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High-level wrapper around Flecs, a powerful ECS (Entity Component System) library, written in Zig language
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flecs-zig-ble/libs/flecs/flecs.h

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// Comment out this line when using as DLL
#define flecs_STATIC
/**
* @file flecs.h
* @brief Flecs public API.
*
* This file contains the public API for Flecs.
*/
#ifndef FLECS_H
#define FLECS_H
/**
* @defgroup c C API
*
* @{
* @}
*/
/**
* @defgroup core Core
* @ingroup c
* Core ECS functionality (entities, storage, queries).
*
* @{
*/
/**
* @defgroup options API defines
* Defines for customizing compile time features.
*
* @{
*/
/** @def ecs_float_t
* Customizable precision for floating point operations */
#ifndef ecs_float_t
#define ecs_float_t float
#endif
/** @def ecs_ftime_t
* Customizable precision for scalar time values. Change to double precision for
* processes that can run for a long time (e.g. longer than a day). */
#ifndef ecs_ftime_t
#define ecs_ftime_t ecs_float_t
#endif
/** @def FLECS_LEGACY
* Define when building for C89
*/
// #define FLECS_LEGACY
/** @def FLECS_NO_DEPRECATED_WARNINGS
* disables deprecated warnings
*/
#define FLECS_NO_DEPRECATED_WARNINGS
/** @def FLECS_ACCURATE_COUNTERS
* Define to ensure that global counters used for statistics (such as the
* allocation counters in the OS API) are accurate in multithreaded
* applications, at the cost of increased overhead.
*/
// #define FLECS_ACCURATE_COUNTERS
/* Make sure provided configuration is valid */
#if defined(FLECS_DEBUG) && defined(FLECS_NDEBUG)
#error "invalid configuration: cannot both define FLECS_DEBUG and FLECS_NDEBUG"
#endif
#if defined(FLECS_DEBUG) && defined(NDEBUG)
#error "invalid configuration: cannot both define FLECS_DEBUG and NDEBUG"
#endif
/** @def FLECS_DEBUG
* Used for input parameter checking and cheap sanity checks. There are lots of
* asserts in every part of the code, so this will slow down applications.
*/
#if !defined(FLECS_DEBUG) && !defined(FLECS_NDEBUG)
#if defined(NDEBUG)
#define FLECS_NDEBUG
#else
#define FLECS_DEBUG
#endif
#endif
/** @def FLECS_SANITIZE
* Enables expensive checks that can detect issues early. Recommended for
* running tests or when debugging issues. This will severely slow down code.
*/
#ifdef FLECS_SANITIZE
#ifndef FLECS_DEBUG
#define FLECS_DEBUG /* If sanitized mode is enabled, so is debug mode */
#endif
#endif
/* Tip: if you see weird behavior that you think might be a bug, make sure to
* test with the FLECS_DEBUG or FLECS_SANITIZE flags enabled. There's a good
* chance that this gives you more information about the issue! */
/** @def FLECS_SOFT_ASSERT
* Define to not abort for recoverable errors, like invalid parameters. An error
* is still thrown to the console. This is recommended for when running inside a
* third party runtime, such as the Unreal editor.
*
* Note that internal sanity checks (ECS_INTERNAL_ERROR) will still abort a
* process, as this gives more information than a (likely) subsequent crash.
*
* When a soft assert occurs, the code will attempt to minimize the number of
* side effects of the failed operation, but this may not always be possible.
* Even though an application may still be able to continue running after a soft
* assert, it should be treated as if in an undefined state.
*/
// #define FLECS_SOFT_ASSERT
/** @def FLECS_KEEP_ASSERT
* By default asserts are disabled in release mode, when either FLECS_NDEBUG or
* NDEBUG is defined. Defining FLECS_KEEP_ASSERT ensures that asserts are not
* disabled. This define can be combined with FLECS_SOFT_ASSERT.
*/
// #define FLECS_KEEP_ASSERT
/** @def FLECS_CUSTOM_BUILD
* This macro lets you customize which addons to build flecs with.
* Without any addons Flecs is just a minimal ECS storage, but addons add
* features such as systems, scheduling and reflection. If an addon is disabled,
* it is excluded from the build, so that it consumes no resources. By default
* all addons are enabled.
*
* You can customize a build by either whitelisting or blacklisting addons. To
* whitelist addons, first define the FLECS_CUSTOM_BUILD macro, which disables
* all addons. You can then manually select the addons you need by defining
* their macro, like "FLECS_SYSTEM".
*
* To blacklist an addon, make sure to *not* define FLECS_CUSTOM_BUILD, and
* instead define the addons you don't need by defining FLECS_NO_<addon>, for
* example "FLECS_NO_SYSTEM". If there are any addons that depend on the
* blacklisted addon, an error will be thrown during the build.
*
* Note that addons can have dependencies on each other. Addons will
* automatically enable their dependencies. To see the list of addons that was
* compiled in a build, enable tracing before creating the world by doing:
*
* @code
* ecs_log_set_level(0);
* @endcode
*
* which outputs the full list of addons Flecs was compiled with.
*/
// #define FLECS_CUSTOM_BUILD
/** @def FLECS_CPP_NO_AUTO_REGISTRATION
* When set, the C++ API will require that components are registered before they
* are used. This is useful in multithreaded applications, where components need
* to be registered beforehand, and to catch issues in projects where component
* registration is mandatory. Disabling automatic component registration also
* slightly improves performance.
* The C API is not affected by this feature.
*/
// #define FLECS_CPP_NO_AUTO_REGISTRATION
#ifndef FLECS_CUSTOM_BUILD
// #define FLECS_C /**< C API convenience macros, always enabled */
#define FLECS_CPP /**< C++ API */
#define FLECS_MODULE /**< Module support */
#define FLECS_PARSER /**< String parser for queries */
#define FLECS_PLECS /**< ECS data definition format */
#define FLECS_RULES /**< Constraint solver for advanced queries */
#define FLECS_SNAPSHOT /**< Snapshot & restore ECS data */
#define FLECS_STATS /**< Access runtime statistics */
#define FLECS_MONITOR /**< Track runtime statistics periodically */
#define FLECS_METRICS /**< Expose component data as statistics */
#define FLECS_ALERTS /**< Monitor conditions for errors */
#define FLECS_SYSTEM /**< System support */
#define FLECS_PIPELINE /**< Pipeline support */
#define FLECS_TIMER /**< Timer support */
#define FLECS_META /**< Reflection support */
#define FLECS_META_C /**< Utilities for populating reflection data */
#define FLECS_UNITS /**< Builtin standard units */
#define FLECS_EXPR /**< Parsing strings to/from component values */
#define FLECS_JSON /**< Parsing JSON to/from component values */
#define FLECS_DOC /**< Document entities & components */
#define FLECS_COREDOC /**< Documentation for core entities & components */
#define FLECS_LOG /**< When enabled ECS provides more detailed logs */
#define FLECS_APP /**< Application addon */
#define FLECS_OS_API_IMPL /**< Default implementation for OS API */
#define FLECS_HTTP /**< Tiny HTTP server for connecting to remote UI */
#define FLECS_REST /**< REST API for querying application data */
// #define FLECS_JOURNAL /**< Journaling addon (disabled by default) */
#endif // ifndef FLECS_CUSTOM_BUILD
/** @def FLECS_LOW_FOOTPRINT
* Set a number of constants to values that decrease memory footprint, at the
* cost of decreased performance. */
// #define FLECS_LOW_FOOTPRINT
#ifdef FLECS_LOW_FOOTPRINT
#define FLECS_HI_COMPONENT_ID (16)
#define FLECS_HI_ID_RECORD_ID (16)
#define FLECS_SPARSE_PAGE_BITS (6)
#define FLECS_ENTITY_PAGE_BITS (6)
#define FLECS_USE_OS_ALLOC
#endif
/** @def FLECS_HI_COMPONENT_ID
* This constant can be used to balance between performance and memory
* utilization. The constant is used in two ways:
* - Entity ids 0..FLECS_HI_COMPONENT_ID are reserved for component ids.
* - Used as lookup array size in table edges.
*
* Increasing this value increases the size of the lookup array, which allows
* fast table traversal, which improves performance of ECS add/remove
* operations. Component ids that fall outside of this range use a regular map
* lookup, which is slower but more memory efficient. */
#ifndef FLECS_HI_COMPONENT_ID
#define FLECS_HI_COMPONENT_ID (256)
#endif
/** @def FLECS_HI_ID_RECORD_ID
* This constant can be used to balance between performance and memory
* utilization. The constant is used to determine the size of the id record
* lookup array. Id values that fall outside of this range use a regular map
* lookup, which is slower but more memory efficient.
*/
#ifndef FLECS_HI_ID_RECORD_ID
#define FLECS_HI_ID_RECORD_ID (1024)
#endif
/** @def FLECS_SPARSE_PAGE_BITS
* This constant is used to determine the number of bits of an id that is used
* to determine the page index when used with a sparse set. The number of bits
* determines the page size, which is (1 << bits).
* Lower values decrease memory utilization, at the cost of more allocations. */
#ifndef FLECS_SPARSE_PAGE_BITS
#define FLECS_SPARSE_PAGE_BITS (12)
#endif
/** @def FLECS_ENTITY_PAGE_BITS
* Same as FLECS_SPARSE_PAGE_BITS, but for the entity index. */
#ifndef FLECS_ENTITY_PAGE_BITS
#define FLECS_ENTITY_PAGE_BITS (12)
#endif
/** @def FLECS_USE_OS_ALLOC
* When enabled, Flecs will use the OS allocator provided in the OS API directly
* instead of the builtin block allocator. This can decrease memory utilization
* as memory will be freed more often, at the cost of decreased performance. */
// #define FLECS_USE_OS_ALLOC
/** @def FLECS_ID_DESC_MAX
* Maximum number of ids to add ecs_entity_desc_t / ecs_bulk_desc_t */
#ifndef FLECS_ID_DESC_MAX
#define FLECS_ID_DESC_MAX (32)
#endif
/** @def FLECS_TERM_DESC_MAX
* Maximum number of terms in ecs_filter_desc_t */
#define FLECS_TERM_DESC_MAX (16)
/** @def FLECS_EVENT_DESC_MAX
* Maximum number of events in ecs_observer_desc_t */
#define FLECS_EVENT_DESC_MAX (8)
/** @def FLECS_VARIABLE_COUNT_MAX
* Maximum number of query variables per query */
#define FLECS_VARIABLE_COUNT_MAX (64)
/** @def FLECS_QUERY_SCOPE_NESTING_MAX
* Maximum nesting depth of query scopes */
#define FLECS_QUERY_SCOPE_NESTING_MAX (8)
/** @} */
/**
* @file api_defines.h
* @brief Supporting defines for the public API.
*
* This file contains constants / macros that are typically not used by an
* application but support the public API, and therefore must be exposed. This
* header should not be included by itself.
*/
#ifndef FLECS_API_DEFINES_H
#define FLECS_API_DEFINES_H
/**
* @file api_flags.h
* @brief Bitset flags used by internals.
*/
#ifndef FLECS_API_FLAGS_H
#define FLECS_API_FLAGS_H
#ifdef __cplusplus
extern "C" {
#endif
////////////////////////////////////////////////////////////////////////////////
//// World flags
////////////////////////////////////////////////////////////////////////////////
#define EcsWorldQuitWorkers (1u << 0)
#define EcsWorldReadonly (1u << 1)
#define EcsWorldInit (1u << 2)
#define EcsWorldQuit (1u << 3)
#define EcsWorldFini (1u << 4)
#define EcsWorldMeasureFrameTime (1u << 5)
#define EcsWorldMeasureSystemTime (1u << 6)
#define EcsWorldMultiThreaded (1u << 7)
////////////////////////////////////////////////////////////////////////////////
//// OS API flags
////////////////////////////////////////////////////////////////////////////////
#define EcsOsApiHighResolutionTimer (1u << 0)
#define EcsOsApiLogWithColors (1u << 1)
#define EcsOsApiLogWithTimeStamp (1u << 2)
#define EcsOsApiLogWithTimeDelta (1u << 3)
////////////////////////////////////////////////////////////////////////////////
//// Entity flags (set in upper bits of ecs_record_t::row)
////////////////////////////////////////////////////////////////////////////////
#define EcsEntityIsId (1u << 31)
#define EcsEntityIsTarget (1u << 30)
#define EcsEntityIsTraversable (1u << 29)
////////////////////////////////////////////////////////////////////////////////
//// Id flags (used by ecs_id_record_t::flags)
////////////////////////////////////////////////////////////////////////////////
#define EcsIdOnDeleteRemove (1u << 0)
#define EcsIdOnDeleteDelete (1u << 1)
#define EcsIdOnDeletePanic (1u << 2)
#define EcsIdOnDeleteMask\
(EcsIdOnDeletePanic|EcsIdOnDeleteRemove|EcsIdOnDeleteDelete)
#define EcsIdOnDeleteObjectRemove (1u << 3)
#define EcsIdOnDeleteObjectDelete (1u << 4)
#define EcsIdOnDeleteObjectPanic (1u << 5)
#define EcsIdOnDeleteObjectMask\
(EcsIdOnDeleteObjectPanic|EcsIdOnDeleteObjectRemove|\
EcsIdOnDeleteObjectDelete)
#define EcsIdExclusive (1u << 6)
#define EcsIdDontInherit (1u << 7)
#define EcsIdTraversable (1u << 8)
#define EcsIdTag (1u << 9)
#define EcsIdWith (1u << 10)
#define EcsIdUnion (1u << 11)
#define EcsIdAlwaysOverride (1u << 12)
#define EcsIdHasOnAdd (1u << 16) /* Same values as table flags */
#define EcsIdHasOnRemove (1u << 17)
#define EcsIdHasOnSet (1u << 18)
#define EcsIdHasUnSet (1u << 19)
#define EcsIdHasOnTableFill (1u << 20)
#define EcsIdHasOnTableEmpty (1u << 21)
#define EcsIdHasOnTableCreate (1u << 22)
#define EcsIdHasOnTableDelete (1u << 23)
#define EcsIdEventMask\
(EcsIdHasOnAdd|EcsIdHasOnRemove|EcsIdHasOnSet|EcsIdHasUnSet|\
EcsIdHasOnTableFill|EcsIdHasOnTableEmpty|EcsIdHasOnTableCreate|\
EcsIdHasOnTableDelete)
#define EcsIdMarkedForDelete (1u << 30)
/* Utilities for converting from flags to delete policies and vice versa */
#define ECS_ID_ON_DELETE(flags) \
((ecs_entity_t[]){0, EcsRemove, EcsDelete, 0, EcsPanic}\
[((flags) & EcsIdOnDeleteMask)])
#define ECS_ID_ON_DELETE_TARGET(flags) ECS_ID_ON_DELETE(flags >> 3)
#define ECS_ID_ON_DELETE_FLAG(id) (1u << ((id) - EcsRemove))
#define ECS_ID_ON_DELETE_TARGET_FLAG(id) (1u << (3 + ((id) - EcsRemove)))
////////////////////////////////////////////////////////////////////////////////
//// Iterator flags (used by ecs_iter_t::flags)
////////////////////////////////////////////////////////////////////////////////
#define EcsIterIsValid (1u << 0u) /* Does iterator contain valid result */
#define EcsIterNoData (1u << 1u) /* Does iterator provide (component) data */
#define EcsIterIsInstanced (1u << 2u) /* Is iterator instanced */
#define EcsIterHasShared (1u << 3u) /* Does result have shared terms */
#define EcsIterTableOnly (1u << 4u) /* Result only populates table */
#define EcsIterEntityOptional (1u << 5u) /* Treat terms with entity subject as optional */
#define EcsIterNoResults (1u << 6u) /* Iterator has no results */
#define EcsIterIgnoreThis (1u << 7u) /* Only evaluate non-this terms */
#define EcsIterMatchVar (1u << 8u)
#define EcsIterHasCondSet (1u << 10u) /* Does iterator have conditionally set fields */
#define EcsIterProfile (1u << 11u) /* Profile iterator performance */
#define EcsIterTrivialSearch (1u << 12u) /* Trivial iterator mode */
#define EcsIterTrivialSearchNoData (1u << 13u) /* Trivial iterator w/no data */
#define EcsIterTrivialTest (1u << 14u) /* Trivial test mode (constrained $this) */
#define EcsIterTrivialSearchWildcard (1u << 15u) /* Trivial search with wildcard ids */
////////////////////////////////////////////////////////////////////////////////
//// Event flags (used by ecs_event_decs_t::flags)
////////////////////////////////////////////////////////////////////////////////
#define EcsEventTableOnly (1u << 4u) /* Table event (no data, same as iter flags) */
#define EcsEventNoOnSet (1u << 16u) /* Don't emit OnSet/UnSet for inherited ids */
////////////////////////////////////////////////////////////////////////////////
//// Filter flags (used by ecs_filter_t::flags)
////////////////////////////////////////////////////////////////////////////////
#define EcsFilterMatchThis (1u << 1u) /* Has terms that match This */
#define EcsFilterMatchOnlyThis (1u << 2u) /* Has only terms that match This */
#define EcsFilterMatchPrefab (1u << 3u) /* Does filter match prefabs */
#define EcsFilterMatchDisabled (1u << 4u) /* Does filter match disabled entities */
#define EcsFilterMatchEmptyTables (1u << 5u) /* Does filter return empty tables */
#define EcsFilterMatchAnything (1u << 6u) /* False if filter has no/only Not terms */
#define EcsFilterNoData (1u << 7u) /* When true, data fields won't be populated */
#define EcsFilterIsInstanced (1u << 8u) /* Is filter instanced (see ecs_filter_desc_t) */
#define EcsFilterPopulate (1u << 9u) /* Populate data, ignore non-matching fields */
#define EcsFilterHasCondSet (1u << 10u) /* Does filter have conditionally set fields */
#define EcsFilterUnresolvedByName (1u << 11u) /* Use by-name matching for unresolved entity identifiers */
#define EcsFilterHasPred (1u << 12u) /* Filter has equality predicates */
#define EcsFilterHasScopes (1u << 13u) /* Filter has query scopes */
#define EcsFilterIsTrivial (1u << 14u) /* Trivial filter */
#define EcsFilterMatchOnlySelf (1u << 15u) /* Filter has no up traversal */
#define EcsFilterHasWildcards (1u << 16u) /* Filter has no up traversal */
#define EcsFilterOwnsStorage (1u << 17u) /* Is ecs_filter_t object owned by filter */
#define EcsFilterOwnsTermsStorage (1u << 18u) /* Is terms array owned by filter */
////////////////////////////////////////////////////////////////////////////////
//// Table flags (used by ecs_table_t::flags)
////////////////////////////////////////////////////////////////////////////////
#define EcsTableHasBuiltins (1u << 1u) /* Does table have builtin components */
#define EcsTableIsPrefab (1u << 2u) /* Does the table store prefabs */
#define EcsTableHasIsA (1u << 3u) /* Does the table have IsA relationship */
#define EcsTableHasChildOf (1u << 4u) /* Does the table type ChildOf relationship */
#define EcsTableHasName (1u << 5u) /* Does the table type have (Identifier, Name) */
#define EcsTableHasPairs (1u << 6u) /* Does the table type have pairs */
#define EcsTableHasModule (1u << 7u) /* Does the table have module data */
#define EcsTableIsDisabled (1u << 8u) /* Does the table type has EcsDisabled */
#define EcsTableHasCtors (1u << 9u)
#define EcsTableHasDtors (1u << 10u)
#define EcsTableHasCopy (1u << 11u)
#define EcsTableHasMove (1u << 12u)
#define EcsTableHasUnion (1u << 13u)
#define EcsTableHasToggle (1u << 14u)
#define EcsTableHasOverrides (1u << 15u)
#define EcsTableHasOnAdd (1u << 16u) /* Same values as id flags */
#define EcsTableHasOnRemove (1u << 17u)
#define EcsTableHasOnSet (1u << 18u)
#define EcsTableHasUnSet (1u << 19u)
#define EcsTableHasOnTableFill (1u << 20u)
#define EcsTableHasOnTableEmpty (1u << 21u)
#define EcsTableHasOnTableCreate (1u << 22u)
#define EcsTableHasOnTableDelete (1u << 23u)
#define EcsTableHasTraversable (1u << 25u)
#define EcsTableHasTarget (1u << 26u)
#define EcsTableMarkedForDelete (1u << 30u)
/* Composite table flags */
#define EcsTableHasLifecycle (EcsTableHasCtors | EcsTableHasDtors)
#define EcsTableIsComplex (EcsTableHasLifecycle | EcsTableHasUnion | EcsTableHasToggle)
#define EcsTableHasAddActions (EcsTableHasIsA | EcsTableHasUnion | EcsTableHasCtors | EcsTableHasOnAdd | EcsTableHasOnSet)
#define EcsTableHasRemoveActions (EcsTableHasIsA | EcsTableHasDtors | EcsTableHasOnRemove | EcsTableHasUnSet)
////////////////////////////////////////////////////////////////////////////////
//// Query flags (used by ecs_query_t::flags)
////////////////////////////////////////////////////////////////////////////////
#define EcsQueryHasRefs (1u << 1u) /* Does query have references */
#define EcsQueryIsSubquery (1u << 2u) /* Is query a subquery */
#define EcsQueryIsOrphaned (1u << 3u) /* Is subquery orphaned */
#define EcsQueryHasOutTerms (1u << 4u) /* Does query have out terms */
#define EcsQueryHasNonThisOutTerms (1u << 5u) /* Does query have non-this out terms */
#define EcsQueryHasMonitor (1u << 6u) /* Does query track changes */
#define EcsQueryTrivialIter (1u << 7u) /* Does the query require special features to iterate */
////////////////////////////////////////////////////////////////////////////////
//// Aperiodic action flags (used by ecs_run_aperiodic)
////////////////////////////////////////////////////////////////////////////////
#define EcsAperiodicEmptyTables (1u << 1u) /* Process pending empty table events */
#define EcsAperiodicComponentMonitors (1u << 2u) /* Process component monitors */
#define EcsAperiodicEmptyQueries (1u << 4u) /* Process empty queries */
#ifdef __cplusplus
}
#endif
#endif
#if defined(_WIN32) || defined(_MSC_VER)
#define ECS_TARGET_WINDOWS
#elif defined(__ANDROID__)
#define ECS_TARGET_ANDROID
#define ECS_TARGET_POSIX
#elif defined(__linux__)
#define ECS_TARGET_LINUX
#define ECS_TARGET_POSIX
#elif defined(__FreeBSD__)
#define ECS_TARGET_FREEBSD
#define ECS_TARGET_POSIX
#elif defined(__APPLE__) && defined(__MACH__)
#define ECS_TARGET_DARWIN
#define ECS_TARGET_POSIX
#elif defined(__EMSCRIPTEN__)
#define ECS_TARGET_EM
#define ECS_TARGET_POSIX
#endif
#if defined(__MINGW32__) || defined(__MINGW64__)
#define ECS_TARGET_MINGW
#endif
#if defined(_MSC_VER)
#ifndef __clang__
#define ECS_TARGET_MSVC
#endif
#endif
#if defined(__clang__)
#define ECS_TARGET_CLANG
#endif
#if defined(__GNUC__)
#define ECS_TARGET_GNU
#endif
/* Map between clang and apple clang versions, as version 13 has a difference in
* the format of __PRETTY_FUNCTION__ which enum reflection depends on. */
#if defined(__clang__)
#if defined(__APPLE__)
#if __clang_major__ == 13
#if __clang_minor__ < 1
#define ECS_CLANG_VERSION 12
#else
#define ECS_CLANG_VERSION 13
#endif
#else
#define ECS_CLANG_VERSION __clang_major__
#endif
#else
#define ECS_CLANG_VERSION __clang_major__
#endif
#endif
/* Ignored warnings */
#if defined(ECS_TARGET_CLANG)
/* Ignore unknown options so we don't have to care about the compiler version */
#pragma clang diagnostic ignored "-Wunknown-warning-option"
/* Warns for double or redundant semicolons. There are legitimate cases where a
* semicolon after an empty statement is useful, for example after a macro that
* is replaced with a code block. With this warning enabled, semicolons would
* only have to be added after macro's that are not code blocks, which in some
* cases isn't possible as the implementation of a macro can be different in
* debug/release mode. */
#pragma clang diagnostic ignored "-Wextra-semi-stmt"
/* This is valid in C99, and Flecs must be compiled as C99. */
#pragma clang diagnostic ignored "-Wdeclaration-after-statement"
/* Clang attribute to detect fallthrough isn't supported on older versions.
* Implicit fallthrough is still detected by gcc and ignored with "fall through"
* comments */
#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
/* This warning prevents adding a default case when all enum constants are part
* of the switch. In C however an enum type can assume any value in the range of
* the type, and this warning makes it harder to catch invalid enum values. */
#pragma clang diagnostic ignored "-Wcovered-switch-default"
/* This warning prevents some casts of function results to a different kind of
* type, e.g. casting an int result to double. Not very useful in practice, as
* it just forces the code to assign to a variable first, then cast. */
#pragma clang diagnostic ignored "-Wbad-function-cast"
/* Format strings can be passed down from other functions. */
#pragma clang diagnostic ignored "-Wformat-nonliteral"
/* Useful, but not reliable enough. It can incorrectly flag macro's as unused
* in standalone builds. */
#pragma clang diagnostic ignored "-Wunused-macros"
#if __clang_major__ == 13
/* clang 13 can throw this warning for a define in ctype.h */
#pragma clang diagnostic ignored "-Wreserved-identifier"
#endif
/* Filenames aren't consistent across targets as they can use different casing
* (e.g. WinSock2 vs winsock2). */
#pragma clang diagnostic ignored "-Wnonportable-system-include-path"
/* Enum reflection relies on testing constant values that may not be valid for
* the enumeration. */
#pragma clang diagnostic ignored "-Wenum-constexpr-conversion"
/* Very difficult to workaround this warning in C, especially for an ECS. */
#pragma clang diagnostic ignored "-Wunsafe-buffer-usage"
/* This warning gets thrown when trying to cast pointer returned from dlproc */
#pragma clang diagnostic ignored "-Wcast-function-type-strict"
/* This warning can get thrown for expressions that evaluate to constants
* in debug/release mode. */
#pragma clang diagnostic ignored "-Wconstant-logical-operand"
#elif defined(ECS_TARGET_GNU)
#ifndef __cplusplus
#pragma GCC diagnostic ignored "-Wdeclaration-after-statement"
#pragma GCC diagnostic ignored "-Wbad-function-cast"
#endif
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
#pragma GCC diagnostic ignored "-Wunused-macros"
/* This warning gets thrown *sometimes* when not all members for a struct are
* provided in an initializer. Flecs heavily relies on descriptor structs that
* only require partly initialization, so this warning isn't useful.
* It doesn't introduce any safety issues (fields are guaranteed to be 0
* initialized), and later versions of gcc (>=11) seem to no longer throw this
* warning. */
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
/* Standard library dependencies */
#include <assert.h>
#include <stdarg.h>
#include <string.h>
/* Non-standard but required. If not provided by platform, add manually. */
#include <stdint.h>
/* Contains macros for importing / exporting symbols */
/*
)
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_.--| |--._
.-'; ;`-'& ; `&.
\ & ; & &_/
|"""---...---"""|
\ | | | | | | | /
`---.|.|.|.---'
* This file is generated by bake.lang.c for your convenience. Headers of
* dependencies will automatically show up in this file. Include bake_config.h
* in your main project file. Do not edit! */
#ifndef FLECS_BAKE_CONFIG_H
#define FLECS_BAKE_CONFIG_H
/* Headers of public dependencies */
/* No dependencies */
/* Convenience macro for exporting symbols */
#ifndef flecs_STATIC
#if defined(flecs_EXPORTS) && (defined(_MSC_VER) || defined(__MINGW32__))
#define FLECS_API __declspec(dllexport)
#elif defined(flecs_EXPORTS)
#define FLECS_API __attribute__((__visibility__("default")))
#elif defined(_MSC_VER)
#define FLECS_API __declspec(dllimport)
#else
#define FLECS_API
#endif
#else
#define FLECS_API
#endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __BAKE_LEGACY__
#define FLECS_LEGACY
#endif
/* Some symbols are only exported when building in debug build, to enable
* white-box testing of internal data structures */
#ifndef FLECS_NDEBUG
#define FLECS_DBG_API FLECS_API
#else
#define FLECS_DBG_API
#endif
////////////////////////////////////////////////////////////////////////////////
//// Language support defines
////////////////////////////////////////////////////////////////////////////////
#ifndef FLECS_LEGACY
#include <stdbool.h>
#endif
#ifndef NULL
#define NULL ((void*)0)
#endif
/* The API uses the native bool type in C++, or a custom one in C */
#if !defined(__cplusplus) && !defined(__bool_true_false_are_defined)
#undef bool
#undef true
#undef false
typedef char bool;
#define false 0
#define true !false
#endif
/* Utility types to indicate usage as bitmask */
typedef uint8_t ecs_flags8_t;
typedef uint16_t ecs_flags16_t;
typedef uint32_t ecs_flags32_t;
typedef uint64_t ecs_flags64_t;
/* Keep unsigned integers out of the codebase as they do more harm than good */
typedef int32_t ecs_size_t;
/* Allocator type */
typedef struct ecs_allocator_t ecs_allocator_t;
#define ECS_SIZEOF(T) ECS_CAST(ecs_size_t, sizeof(T))
/* Use alignof in C++, or a trick in C. */
#ifdef __cplusplus
#define ECS_ALIGNOF(T) static_cast<int64_t>(alignof(T))
#elif defined(ECS_TARGET_MSVC)
#define ECS_ALIGNOF(T) (int64_t)__alignof(T)
#elif defined(ECS_TARGET_GNU)
#define ECS_ALIGNOF(T) (int64_t)__alignof__(T)
#else
#define ECS_ALIGNOF(T) ((int64_t)&((struct { char c; T d; } *)0)->d)
#endif
#ifndef FLECS_NO_DEPRECATED_WARNINGS
#if defined(ECS_TARGET_GNU)
#define ECS_DEPRECATED(msg) __attribute__((deprecated(msg)))
#elif defined(ECS_TARGET_MSVC)
#define ECS_DEPRECATED(msg) __declspec(deprecated(msg))
#else
#define ECS_DEPRECATED(msg)
#endif
#else
#define ECS_DEPRECATED(msg)
#endif
#define ECS_ALIGN(size, alignment) (ecs_size_t)((((((size_t)size) - 1) / ((size_t)alignment)) + 1) * ((size_t)alignment))
/* Simple utility for determining the max of two values */
#define ECS_MAX(a, b) (((a) > (b)) ? a : b)
#define ECS_MIN(a, b) (((a) < (b)) ? a : b)
/* Abstraction on top of C-style casts so that C functions can be used in C++
* code without producing warnings */
#ifndef __cplusplus
#define ECS_CAST(T, V) ((T)(V))
#else
#define ECS_CAST(T, V) (static_cast<T>(V))
#endif
/* Utility macro for doing const casts without warnings */
#ifndef __cplusplus
#define ECS_CONST_CAST(type, value) ((type)(uintptr_t)(value))
#else
#define ECS_CONST_CAST(type, value) (const_cast<type>(value))
#endif
/* Utility macro for doing pointer casts without warnings */
#ifndef __cplusplus
#define ECS_PTR_CAST(type, value) ((type)(uintptr_t)(value))
#else
#define ECS_PTR_CAST(type, value) (reinterpret_cast<type>(value))
#endif
/* Utility macro's to do bitwise comparisons between floats without warnings */
#define ECS_EQ(a, b) (ecs_os_memcmp(&(a), &(b), sizeof(a)) == 0)
#define ECS_NEQ(a, b) (!ECS_EQ(a, b))
#define ECS_EQZERO(a) ECS_EQ(a, (uint64_t){0})
#define ECS_NEQZERO(a) ECS_NEQ(a, (uint64_t){0})
#define ECS_CONCAT(a, b) a ## b
////////////////////////////////////////////////////////////////////////////////
//// Magic numbers for sanity checking
////////////////////////////////////////////////////////////////////////////////
/* Magic number to identify the type of the object */
#define ecs_world_t_magic (0x65637377)
#define ecs_stage_t_magic (0x65637373)
#define ecs_query_t_magic (0x65637371)
#define ecs_rule_t_magic (0x65637375)
#define ecs_table_t_magic (0x65637374)
#define ecs_filter_t_magic (0x65637366)
#define ecs_trigger_t_magic (0x65637372)
#define ecs_observer_t_magic (0x65637362)
////////////////////////////////////////////////////////////////////////////////
//// Entity id macros
////////////////////////////////////////////////////////////////////////////////
#define ECS_ROW_MASK (0x0FFFFFFFu)
#define ECS_ROW_FLAGS_MASK (~ECS_ROW_MASK)
#define ECS_RECORD_TO_ROW(v) (ECS_CAST(int32_t, (ECS_CAST(uint32_t, v) & ECS_ROW_MASK)))
#define ECS_RECORD_TO_ROW_FLAGS(v) (ECS_CAST(uint32_t, v) & ECS_ROW_FLAGS_MASK)
#define ECS_ROW_TO_RECORD(row, flags) (ECS_CAST(uint32_t, (ECS_CAST(uint32_t, row) | (flags))))
#define ECS_ID_FLAGS_MASK (0xFFull << 60)
#define ECS_ENTITY_MASK (0xFFFFFFFFull)
#define ECS_GENERATION_MASK (0xFFFFull << 32)
#define ECS_GENERATION(e) ((e & ECS_GENERATION_MASK) >> 32)
#define ECS_GENERATION_INC(e) ((e & ~ECS_GENERATION_MASK) | ((0xFFFF & (ECS_GENERATION(e) + 1)) << 32))
#define ECS_COMPONENT_MASK (~ECS_ID_FLAGS_MASK)
#define ECS_HAS_ID_FLAG(e, flag) ((e) & ECS_##flag)
#define ECS_IS_PAIR(id) (((id) & ECS_ID_FLAGS_MASK) == ECS_PAIR)
#define ECS_PAIR_FIRST(e) (ecs_entity_t_hi(e & ECS_COMPONENT_MASK))
#define ECS_PAIR_SECOND(e) (ecs_entity_t_lo(e))
#define ECS_HAS_RELATION(e, rel) (ECS_HAS_ID_FLAG(e, PAIR) && (ECS_PAIR_FIRST(e) == rel))
////////////////////////////////////////////////////////////////////////////////
//// Convert between C typenames and variables
////////////////////////////////////////////////////////////////////////////////
/** Translate C type to id. */
#define ecs_id(T) FLECS_ID##T##ID_
////////////////////////////////////////////////////////////////////////////////
//// Utilities for working with pair identifiers
////////////////////////////////////////////////////////////////////////////////
#define ecs_entity_t_lo(value) ECS_CAST(uint32_t, value)
#define ecs_entity_t_hi(value) ECS_CAST(uint32_t, (value) >> 32)
#define ecs_entity_t_comb(lo, hi) ((ECS_CAST(uint64_t, hi) << 32) + ECS_CAST(uint32_t, lo))
#define ecs_pair(pred, obj) (ECS_PAIR | ecs_entity_t_comb(obj, pred))
#define ecs_pair_t(pred, obj) (ECS_PAIR | ecs_entity_t_comb(obj, ecs_id(pred)))
#define ecs_pair_first(world, pair) ecs_get_alive(world, ECS_PAIR_FIRST(pair))
#define ecs_pair_second(world, pair) ecs_get_alive(world, ECS_PAIR_SECOND(pair))
#define ecs_pair_relation ecs_pair_first
#define ecs_pair_object ecs_pair_second
#define ecs_poly_id(tag) ecs_pair(ecs_id(EcsPoly), tag)
////////////////////////////////////////////////////////////////////////////////
//// Debug macros
////////////////////////////////////////////////////////////////////////////////
#ifndef FLECS_NDEBUG
#define ECS_TABLE_LOCK(world, table) ecs_table_lock(world, table)
#define ECS_TABLE_UNLOCK(world, table) ecs_table_unlock(world, table)
#else
#define ECS_TABLE_LOCK(world, table)
#define ECS_TABLE_UNLOCK(world, table)
#endif
////////////////////////////////////////////////////////////////////////////////
//// Actions that drive iteration
////////////////////////////////////////////////////////////////////////////////
#define EcsIterNextYield (0) /* Move to next table, yield current */
#define EcsIterYield (-1) /* Stay on current table, yield */
#define EcsIterNext (1) /* Move to next table, don't yield */
////////////////////////////////////////////////////////////////////////////////
//// Convenience macros for ctor, dtor, move and copy
////////////////////////////////////////////////////////////////////////////////
#ifndef FLECS_LEGACY
/* Constructor/Destructor convenience macro */
#define ECS_XTOR_IMPL(type, postfix, var, ...)\
void type##_##postfix(\
void *_ptr,\
int32_t _count,\
const ecs_type_info_t *type_info)\
{\
(void)_ptr;\
(void)_count;\
(void)type_info;\
for (int32_t i = 0; i < _count; i ++) {\
type *var = &((type*)_ptr)[i];\
(void)var;\
__VA_ARGS__\
}\
}
/* Copy convenience macro */
#define ECS_COPY_IMPL(type, dst_var, src_var, ...)\
void type##_##copy(\
void *_dst_ptr,\
const void *_src_ptr,\
int32_t _count,\
const ecs_type_info_t *type_info)\
{\
(void)_dst_ptr;\
(void)_src_ptr;\
(void)_count;\
(void)type_info;\
for (int32_t i = 0; i < _count; i ++) {\
type *dst_var = &((type*)_dst_ptr)[i];\
const type *src_var = &((const type*)_src_ptr)[i];\
(void)dst_var;\
(void)src_var;\
__VA_ARGS__\
}\
}
/* Move convenience macro */
#define ECS_MOVE_IMPL(type, dst_var, src_var, ...)\
void type##_##move(\
void *_dst_ptr,\
void *_src_ptr,\
int32_t _count,\
const ecs_type_info_t *type_info)\
{\
(void)_dst_ptr;\
(void)_src_ptr;\
(void)_count;\
(void)type_info;\
for (int32_t i = 0; i < _count; i ++) {\
type *dst_var = &((type*)_dst_ptr)[i];\
type *src_var = &((type*)_src_ptr)[i];\
(void)dst_var;\
(void)src_var;\
__VA_ARGS__\
}\
}
#define ECS_HOOK_IMPL(type, func, var, ...)\
void func(ecs_iter_t *_it)\
{\
for (int32_t i = 0; i < _it->count; i ++) {\
ecs_entity_t entity = _it->entities[i];\
type *var = &((type*)_it->ptrs[0])[i];\
(void)entity;\
(void)var;\
__VA_ARGS__\
}\
}
#endif
#ifdef __cplusplus
}
#endif
#endif
/**
* @file vec.h
* @brief Vector with allocator support.
*/
#ifndef FLECS_VEC_H
#define FLECS_VEC_H
#ifdef __cplusplus
extern "C" {
#endif
/** A component column. */
typedef struct ecs_vec_t {
void *array;
int32_t count;
int32_t size;
#ifdef FLECS_SANITIZE
ecs_size_t elem_size;
#endif
} ecs_vec_t;
FLECS_API
ecs_vec_t* ecs_vec_init(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem_count);
#define ecs_vec_init_t(allocator, vec, T, elem_count) \
ecs_vec_init(allocator, vec, ECS_SIZEOF(T), elem_count)
FLECS_API
void ecs_vec_init_if(
ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_init_if_t(vec, T) \
ecs_vec_init_if(vec, ECS_SIZEOF(T))
FLECS_API
void ecs_vec_fini(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_fini_t(allocator, vec, T) \
ecs_vec_fini(allocator, vec, ECS_SIZEOF(T))
FLECS_API
ecs_vec_t* ecs_vec_reset(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_reset_t(allocator, vec, T) \
ecs_vec_reset(allocator, vec, ECS_SIZEOF(T))
FLECS_API
void ecs_vec_clear(
ecs_vec_t *vec);
FLECS_API
void* ecs_vec_append(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_append_t(allocator, vec, T) \
ECS_CAST(T*, ecs_vec_append(allocator, vec, ECS_SIZEOF(T)))
FLECS_API
void ecs_vec_remove(
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem);
#define ecs_vec_remove_t(vec, T, elem) \
ecs_vec_remove(vec, ECS_SIZEOF(T), elem)
FLECS_API
void ecs_vec_remove_last(
ecs_vec_t *vec);
FLECS_API
ecs_vec_t ecs_vec_copy(
struct ecs_allocator_t *allocator,
const ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_copy_t(allocator, vec, T) \
ecs_vec_copy(allocator, vec, ECS_SIZEOF(T))
FLECS_API
ecs_vec_t ecs_vec_copy_shrink(
struct ecs_allocator_t *allocator,
const ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_copy_shrink_t(allocator, vec, T) \
ecs_vec_copy_shrink(allocator, vec, ECS_SIZEOF(T))
FLECS_API
void ecs_vec_reclaim(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_reclaim_t(allocator, vec, T) \
ecs_vec_reclaim(allocator, vec, ECS_SIZEOF(T))
FLECS_API
void ecs_vec_set_size(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem_count);
#define ecs_vec_set_size_t(allocator, vec, T, elem_count) \
ecs_vec_set_size(allocator, vec, ECS_SIZEOF(T), elem_count)
FLECS_API
void ecs_vec_set_min_size(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem_count);
#define ecs_vec_set_min_size_t(allocator, vec, T, elem_count) \
ecs_vec_set_min_size(allocator, vec, ECS_SIZEOF(T), elem_count)
FLECS_API
void ecs_vec_set_min_count(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem_count);
#define ecs_vec_set_min_count_t(allocator, vec, T, elem_count) \
ecs_vec_set_min_count(allocator, vec, ECS_SIZEOF(T), elem_count)
FLECS_API
void ecs_vec_set_min_count_zeromem(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem_count);
#define ecs_vec_set_min_count_zeromem_t(allocator, vec, T, elem_count) \
ecs_vec_set_min_count_zeromem(allocator, vec, ECS_SIZEOF(T), elem_count)
FLECS_API
void ecs_vec_set_count(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem_count);
#define ecs_vec_set_count_t(allocator, vec, T, elem_count) \
ecs_vec_set_count(allocator, vec, ECS_SIZEOF(T), elem_count)
FLECS_API
void* ecs_vec_grow(
struct ecs_allocator_t *allocator,
ecs_vec_t *vec,
ecs_size_t size,
int32_t elem_count);
#define ecs_vec_grow_t(allocator, vec, T, elem_count) \
ecs_vec_grow(allocator, vec, ECS_SIZEOF(T), elem_count)
FLECS_API
int32_t ecs_vec_count(
const ecs_vec_t *vec);
FLECS_API
int32_t ecs_vec_size(
const ecs_vec_t *vec);
FLECS_API
void* ecs_vec_get(
const ecs_vec_t *vec,
ecs_size_t size,
int32_t index);
#define ecs_vec_get_t(vec, T, index) \
ECS_CAST(T*, ecs_vec_get(vec, ECS_SIZEOF(T), index))
FLECS_API
void* ecs_vec_first(
const ecs_vec_t *vec);
#define ecs_vec_first_t(vec, T) \
ECS_CAST(T*, ecs_vec_first(vec))
FLECS_API
void* ecs_vec_last(
const ecs_vec_t *vec,
ecs_size_t size);
#define ecs_vec_last_t(vec, T) \
ECS_CAST(T*, ecs_vec_last(vec, ECS_SIZEOF(T)))
#ifdef __cplusplus
}
#endif
#endif
/**
* @file sparse.h
* @brief Sparse set data structure.
*/
#ifndef FLECS_SPARSE_H
#define FLECS_SPARSE_H
#ifdef __cplusplus
extern "C" {
#endif
/** The number of elements in a single page */
#define FLECS_SPARSE_PAGE_SIZE (1 << FLECS_SPARSE_PAGE_BITS)
typedef struct ecs_sparse_t {
ecs_vec_t dense; /* Dense array with indices to sparse array. The
* dense array stores both alive and not alive
* sparse indices. The 'count' member keeps
* track of which indices are alive. */
ecs_vec_t pages; /* Chunks with sparse arrays & data */
ecs_size_t size; /* Element size */
int32_t count; /* Number of alive entries */
uint64_t max_id; /* Local max index (if no global is set) */
struct ecs_allocator_t *allocator;
struct ecs_block_allocator_t *page_allocator;
} ecs_sparse_t;
/** Initialize sparse set */
FLECS_DBG_API
void flecs_sparse_init(
ecs_sparse_t *result,
struct ecs_allocator_t *allocator,
struct ecs_block_allocator_t *page_allocator,
ecs_size_t size);
#define flecs_sparse_init_t(result, allocator, page_allocator, T)\
flecs_sparse_init(result, allocator, page_allocator, ECS_SIZEOF(T))
FLECS_DBG_API
void flecs_sparse_fini(
ecs_sparse_t *sparse);
/** Remove all elements from sparse set */
FLECS_DBG_API
void flecs_sparse_clear(
ecs_sparse_t *sparse);
/** Add element to sparse set, this generates or recycles an id */
FLECS_DBG_API
void* flecs_sparse_add(
ecs_sparse_t *sparse,
ecs_size_t elem_size);
#define flecs_sparse_add_t(sparse, T)\
ECS_CAST(T*, flecs_sparse_add(sparse, ECS_SIZEOF(T)))
/** Get last issued id. */
FLECS_DBG_API
uint64_t flecs_sparse_last_id(
const ecs_sparse_t *sparse);
/** Generate or recycle a new id. */
FLECS_DBG_API
uint64_t flecs_sparse_new_id(
ecs_sparse_t *sparse);
/** Remove an element */
FLECS_DBG_API
void flecs_sparse_remove(
ecs_sparse_t *sparse,
ecs_size_t elem_size,
uint64_t id);
#define flecs_sparse_remove_t(sparse, T, id)\
flecs_sparse_remove(sparse, ECS_SIZEOF(T), id)
/** Test if id is alive, which requires the generation count to match. */
FLECS_DBG_API
bool flecs_sparse_is_alive(
const ecs_sparse_t *sparse,
uint64_t id);
/** Get value from sparse set by dense id. This function is useful in
* combination with flecs_sparse_count for iterating all values in the set. */
FLECS_DBG_API
void* flecs_sparse_get_dense(
const ecs_sparse_t *sparse,
ecs_size_t elem_size,
int32_t index);
#define flecs_sparse_get_dense_t(sparse, T, index)\
ECS_CAST(T*, flecs_sparse_get_dense(sparse, ECS_SIZEOF(T), index))
/** Get the number of alive elements in the sparse set. */
FLECS_DBG_API
int32_t flecs_sparse_count(
const ecs_sparse_t *sparse);
/** Get element by (sparse) id. The returned pointer is stable for the duration
* of the sparse set, as it is stored in the sparse array. */
FLECS_DBG_API
void* flecs_sparse_get(
const ecs_sparse_t *sparse,
ecs_size_t elem_size,
uint64_t id);
#define flecs_sparse_get_t(sparse, T, index)\
ECS_CAST(T*, flecs_sparse_get(sparse, ECS_SIZEOF(T), index))
/** Same as flecs_sparse_get, but doesn't assert if id is not alive. */
FLECS_DBG_API
void* flecs_sparse_try(
const ecs_sparse_t *sparse,
ecs_size_t elem_size,
uint64_t id);
#define flecs_sparse_try_t(sparse, T, index)\
ECS_CAST(T*, flecs_sparse_try(sparse, ECS_SIZEOF(T), index))
/** Like get_sparse, but don't care whether element is alive or not. */
FLECS_DBG_API
void* flecs_sparse_get_any(
const ecs_sparse_t *sparse,
ecs_size_t elem_size,
uint64_t id);
#define flecs_sparse_get_any_t(sparse, T, index)\
ECS_CAST(T*, flecs_sparse_get_any(sparse, ECS_SIZEOF(T), index))
/** Get or create element by (sparse) id. */
FLECS_DBG_API
void* flecs_sparse_ensure(
ecs_sparse_t *sparse,
ecs_size_t elem_size,
uint64_t id);
#define flecs_sparse_ensure_t(sparse, T, index)\
ECS_CAST(T*, flecs_sparse_ensure(sparse, ECS_SIZEOF(T), index))
/** Fast version of ensure, no liveliness checking */
FLECS_DBG_API
void* flecs_sparse_ensure_fast(
ecs_sparse_t *sparse,
ecs_size_t elem_size,
uint64_t id);
#define flecs_sparse_ensure_fast_t(sparse, T, index)\
ECS_CAST(T*, flecs_sparse_ensure_fast(sparse, ECS_SIZEOF(T), index))
/** Get pointer to ids (alive and not alive). Use with count() or size(). */
FLECS_DBG_API
const uint64_t* flecs_sparse_ids(
const ecs_sparse_t *sparse);
/* Publicly exposed APIs
* The flecs_ functions aren't exposed directly as this can cause some
* optimizers to not consider them for link time optimization. */
FLECS_API
void ecs_sparse_init(
ecs_sparse_t *sparse,
ecs_size_t elem_size);
#define ecs_sparse_init_t(sparse, T)\
ecs_sparse_init(sparse, ECS_SIZEOF(T))
FLECS_API
void* ecs_sparse_add(
ecs_sparse_t *sparse,
ecs_size_t elem_size);
#define ecs_sparse_add_t(sparse, T)\
ECS_CAST(T*, ecs_sparse_add(sparse, ECS_SIZEOF(T)))
FLECS_API
uint64_t ecs_sparse_last_id(
const ecs_sparse_t *sparse);
FLECS_API
int32_t ecs_sparse_count(
const ecs_sparse_t *sparse);
/** Override the generation count for a specific id */
FLECS_API
void flecs_sparse_set_generation(
ecs_sparse_t *sparse,
uint64_t id);
FLECS_API
void* ecs_sparse_get_dense(
const ecs_sparse_t *sparse,
ecs_size_t elem_size,
int32_t index);
#define ecs_sparse_get_dense_t(sparse, T, index)\
ECS_CAST(T*, ecs_sparse_get_dense(sparse, ECS_SIZEOF(T), index))
FLECS_API
void* ecs_sparse_get(
const ecs_sparse_t *sparse,
ecs_size_t elem_size,
uint64_t id);
#define ecs_sparse_get_t(sparse, T, index)\
ECS_CAST(T*, ecs_sparse_get(sparse, ECS_SIZEOF(T), index))
#ifdef __cplusplus
}
#endif
#endif
/**
* @file block_allocator.h
* @brief Block allocator.
*/
#ifndef FLECS_BLOCK_ALLOCATOR_H
#define FLECS_BLOCK_ALLOCATOR_H
typedef struct ecs_block_allocator_block_t {
void *memory;
struct ecs_block_allocator_block_t *next;
} ecs_block_allocator_block_t;
typedef struct ecs_block_allocator_chunk_header_t {
struct ecs_block_allocator_chunk_header_t *next;
} ecs_block_allocator_chunk_header_t;
typedef struct ecs_block_allocator_t {
ecs_block_allocator_chunk_header_t *head;
ecs_block_allocator_block_t *block_head;
ecs_block_allocator_block_t *block_tail;
int32_t chunk_size;
int32_t data_size;
int32_t chunks_per_block;
int32_t block_size;
int32_t alloc_count;
} ecs_block_allocator_t;
FLECS_API
void flecs_ballocator_init(
ecs_block_allocator_t *ba,
ecs_size_t size);
#define flecs_ballocator_init_t(ba, T)\
flecs_ballocator_init(ba, ECS_SIZEOF(T))
#define flecs_ballocator_init_n(ba, T, count)\
flecs_ballocator_init(ba, ECS_SIZEOF(T) * count)
FLECS_API
ecs_block_allocator_t* flecs_ballocator_new(
ecs_size_t size);
#define flecs_ballocator_new_t(T)\
flecs_ballocator_new(ECS_SIZEOF(T))
#define flecs_ballocator_new_n(T, count)\
flecs_ballocator_new(ECS_SIZEOF(T) * count)
FLECS_API
void flecs_ballocator_fini(
ecs_block_allocator_t *ba);
FLECS_API
void flecs_ballocator_free(
ecs_block_allocator_t *ba);
FLECS_API
void* flecs_balloc(
ecs_block_allocator_t *allocator);
FLECS_API
void* flecs_bcalloc(
ecs_block_allocator_t *allocator);
FLECS_API
void flecs_bfree(
ecs_block_allocator_t *allocator,
void *memory);
FLECS_API
void* flecs_brealloc(
ecs_block_allocator_t *dst,
ecs_block_allocator_t *src,
void *memory);
FLECS_API
void* flecs_bdup(
ecs_block_allocator_t *ba,
void *memory);
#endif
/**
* @file map.h
* @brief Map data structure.
*/
#ifndef FLECS_MAP_H
#define FLECS_MAP_H
#ifdef __cplusplus
extern "C" {
#endif
typedef uint64_t ecs_map_data_t;
typedef ecs_map_data_t ecs_map_key_t;
typedef ecs_map_data_t ecs_map_val_t;
/* Map type */
typedef struct ecs_bucket_entry_t {
ecs_map_key_t key;
ecs_map_val_t value;
struct ecs_bucket_entry_t *next;
} ecs_bucket_entry_t;
typedef struct ecs_bucket_t {
ecs_bucket_entry_t *first;
} ecs_bucket_t;
typedef struct ecs_map_t {
uint8_t bucket_shift;
bool shared_allocator;
ecs_bucket_t *buckets;
int32_t bucket_count;
int32_t count;
struct ecs_block_allocator_t *entry_allocator;
struct ecs_allocator_t *allocator;
} ecs_map_t;
typedef struct ecs_map_iter_t {
const ecs_map_t *map;
ecs_bucket_t *bucket;
ecs_bucket_entry_t *entry;
ecs_map_data_t *res;
} ecs_map_iter_t;
typedef struct ecs_map_params_t {
struct ecs_allocator_t *allocator;
struct ecs_block_allocator_t entry_allocator;
} ecs_map_params_t;
/* Function/macro postfixes meaning:
* _ptr: access ecs_map_val_t as void*
* _ref: access ecs_map_val_t* as T**
* _deref: dereferences a _ref
* _alloc: if _ptr is NULL, alloc
* _free: if _ptr is not NULL, free
*/
FLECS_API
void ecs_map_params_init(
ecs_map_params_t *params,
struct ecs_allocator_t *allocator);
FLECS_API
void ecs_map_params_fini(
ecs_map_params_t *params);
/** Initialize new map. */
FLECS_API
void ecs_map_init(
ecs_map_t *map,
struct ecs_allocator_t *allocator);
/** Initialize new map. */
FLECS_API
void ecs_map_init_w_params(
ecs_map_t *map,
ecs_map_params_t *params);
/** Initialize new map if uninitialized, leave as is otherwise */
FLECS_API
void ecs_map_init_if(
ecs_map_t *map,
struct ecs_allocator_t *allocator);
FLECS_API
void ecs_map_init_w_params_if(
ecs_map_t *result,
ecs_map_params_t *params);
/** Deinitialize map. */
FLECS_API
void ecs_map_fini(
ecs_map_t *map);
/** Get element for key, returns NULL if they key doesn't exist. */
FLECS_API
ecs_map_val_t* ecs_map_get(
const ecs_map_t *map,
ecs_map_key_t key);
/* Get element as pointer (auto-dereferences _ptr) */
FLECS_API
void* ecs_map_get_deref_(
const ecs_map_t *map,
ecs_map_key_t key);
/** Get or insert element for key. */
FLECS_API
ecs_map_val_t* ecs_map_ensure(
ecs_map_t *map,
ecs_map_key_t key);
/** Get or insert pointer element for key, allocate if the pointer is NULL */
FLECS_API
void* ecs_map_ensure_alloc(
ecs_map_t *map,
ecs_size_t elem_size,
ecs_map_key_t key);
/** Insert element for key. */
FLECS_API
void ecs_map_insert(
ecs_map_t *map,
ecs_map_key_t key,
ecs_map_val_t value);
/** Insert pointer element for key, populate with new allocation. */
FLECS_API
void* ecs_map_insert_alloc(
ecs_map_t *map,
ecs_size_t elem_size,
ecs_map_key_t key);
/** Remove key from map. */
FLECS_API
ecs_map_val_t ecs_map_remove(
ecs_map_t *map,
ecs_map_key_t key);
/* Remove pointer element, free if not NULL */
FLECS_API
void ecs_map_remove_free(
ecs_map_t *map,
ecs_map_key_t key);
/** Remove all elements from map. */
FLECS_API
void ecs_map_clear(
ecs_map_t *map);
/** Return number of elements in map. */
#define ecs_map_count(map) ((map) ? (map)->count : 0)
/** Is map initialized */
#define ecs_map_is_init(map) ((map) ? (map)->bucket_shift != 0 : false)
/** Return iterator to map contents. */
FLECS_API
ecs_map_iter_t ecs_map_iter(
const ecs_map_t *map);
/** Obtain next element in map from iterator. */
FLECS_API
bool ecs_map_next(
ecs_map_iter_t *iter);
/** Copy map. */
FLECS_API
void ecs_map_copy(
ecs_map_t *dst,
const ecs_map_t *src);
#define ecs_map_get_ref(m, T, k) ECS_CAST(T**, ecs_map_get(m, k))
#define ecs_map_get_deref(m, T, k) ECS_CAST(T*, ecs_map_get_deref_(m, k))
#define ecs_map_ensure_ref(m, T, k) ECS_CAST(T**, ecs_map_ensure(m, k))
#define ecs_map_insert_ptr(m, k, v) ecs_map_insert(m, k, ECS_CAST(ecs_map_val_t, ECS_PTR_CAST(uintptr_t, v)))
#define ecs_map_insert_alloc_t(m, T, k) ECS_CAST(T*, ecs_map_insert_alloc(m, ECS_SIZEOF(T), k))
#define ecs_map_ensure_alloc_t(m, T, k) ECS_PTR_CAST(T*, (uintptr_t)ecs_map_ensure_alloc(m, ECS_SIZEOF(T), k))
#define ecs_map_remove_ptr(m, k) (ECS_PTR_CAST(void*, ECS_CAST(uintptr_t, (ecs_map_remove(m, k)))))
#define ecs_map_key(it) ((it)->res[0])
#define ecs_map_value(it) ((it)->res[1])
#define ecs_map_ptr(it) ECS_PTR_CAST(void*, ECS_CAST(uintptr_t, ecs_map_value(it)))
#define ecs_map_ref(it, T) (ECS_CAST(T**, &((it)->res[1])))
#ifdef __cplusplus
}
#endif
#endif
/**
* @file allocator.h
* @brief Allocator that returns memory objects of any size.
*/
#ifndef FLECS_ALLOCATOR_H
#define FLECS_ALLOCATOR_H
FLECS_DBG_API extern int64_t ecs_block_allocator_alloc_count;
FLECS_DBG_API extern int64_t ecs_block_allocator_free_count;
FLECS_DBG_API extern int64_t ecs_stack_allocator_alloc_count;
FLECS_DBG_API extern int64_t ecs_stack_allocator_free_count;
struct ecs_allocator_t {
ecs_block_allocator_t chunks;
struct ecs_sparse_t sizes; /* <size, block_allocator_t> */
};
FLECS_API
void flecs_allocator_init(
ecs_allocator_t *a);
FLECS_API
void flecs_allocator_fini(
ecs_allocator_t *a);
FLECS_API
ecs_block_allocator_t* flecs_allocator_get(
ecs_allocator_t *a,
ecs_size_t size);
FLECS_API
char* flecs_strdup(
ecs_allocator_t *a,
const char* str);
FLECS_API
void flecs_strfree(
ecs_allocator_t *a,
char* str);
FLECS_API
void* flecs_dup(
ecs_allocator_t *a,
ecs_size_t size,
const void *src);
#define flecs_allocator(obj) (&obj->allocators.dyn)
#define flecs_alloc(a, size) flecs_balloc(flecs_allocator_get(a, size))
#define flecs_alloc_t(a, T) flecs_alloc(a, ECS_SIZEOF(T))
#define flecs_alloc_n(a, T, count) flecs_alloc(a, ECS_SIZEOF(T) * (count))
#define flecs_calloc(a, size) flecs_bcalloc(flecs_allocator_get(a, size))
#define flecs_calloc_t(a, T) flecs_calloc(a, ECS_SIZEOF(T))
#define flecs_calloc_n(a, T, count) flecs_calloc(a, ECS_SIZEOF(T) * (count))
#define flecs_free(a, size, ptr) flecs_bfree(flecs_allocator_get(a, size), ptr)
#define flecs_free_t(a, T, ptr) flecs_free(a, ECS_SIZEOF(T), ptr)
#define flecs_free_n(a, T, count, ptr) flecs_free(a, ECS_SIZEOF(T) * (count), ptr)
#define flecs_realloc(a, size_dst, size_src, ptr)\
flecs_brealloc(flecs_allocator_get(a, size_dst),\
flecs_allocator_get(a, size_src),\
ptr)
#define flecs_realloc_n(a, T, count_dst, count_src, ptr)\
flecs_realloc(a, ECS_SIZEOF(T) * (count_dst), ECS_SIZEOF(T) * (count_src), ptr)
#define flecs_dup_n(a, T, count, ptr) flecs_dup(a, ECS_SIZEOF(T) * (count), ptr)
#endif
/**
* @file strbuf.h
* @brief Utility for constructing strings.
*/
#ifndef FLECS_STRBUF_H_
#define FLECS_STRBUF_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
/* Fixes missing field initializer warning on g++ */
#define ECS_STRBUF_INIT (ecs_strbuf_t){}
#else
#define ECS_STRBUF_INIT (ecs_strbuf_t){0}
#endif
#define ECS_STRBUF_SMALL_STRING_SIZE (512)
#define ECS_STRBUF_MAX_LIST_DEPTH (32)
typedef struct ecs_strbuf_list_elem {
int32_t count;
const char *separator;
} ecs_strbuf_list_elem;
typedef struct ecs_strbuf_t {
char *content;
ecs_size_t length;
ecs_size_t size;
ecs_strbuf_list_elem list_stack[ECS_STRBUF_MAX_LIST_DEPTH];
int32_t list_sp;
char small_string[ECS_STRBUF_SMALL_STRING_SIZE];
} ecs_strbuf_t;
/* Append format string to a buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_append(
ecs_strbuf_t *buffer,
const char *fmt,
...);
/* Append format string with argument list to a buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_vappend(
ecs_strbuf_t *buffer,
const char *fmt,
va_list args);
/* Append string to buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_appendstr(
ecs_strbuf_t *buffer,
const char *str);
/* Append character to buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_appendch(
ecs_strbuf_t *buffer,
char ch);
/* Append int to buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_appendint(
ecs_strbuf_t *buffer,
int64_t v);
/* Append float to buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_appendflt(
ecs_strbuf_t *buffer,
double v,
char nan_delim);
/* Append boolean to buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_appendbool(
ecs_strbuf_t *buffer,
bool v);
/* Append source buffer to destination buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_mergebuff(
ecs_strbuf_t *dst_buffer,
ecs_strbuf_t *src_buffer);
/* Append n characters to buffer.
* Returns false when max is reached, true when there is still space */
FLECS_API
void ecs_strbuf_appendstrn(
ecs_strbuf_t *buffer,
const char *str,
int32_t n);
/* Return result string */
FLECS_API
char* ecs_strbuf_get(
ecs_strbuf_t *buffer);
/* Return small string from first element (appends \0) */
FLECS_API
char* ecs_strbuf_get_small(
ecs_strbuf_t *buffer);
/* Reset buffer without returning a string */
FLECS_API
void ecs_strbuf_reset(
ecs_strbuf_t *buffer);
/* Push a list */
FLECS_API
void ecs_strbuf_list_push(
ecs_strbuf_t *buffer,
const char *list_open,
const char *separator);
/* Pop a new list */
FLECS_API
void ecs_strbuf_list_pop(
ecs_strbuf_t *buffer,
const char *list_close);
/* Insert a new element in list */
FLECS_API
void ecs_strbuf_list_next(
ecs_strbuf_t *buffer);
/* Append character to as new element in list. */
FLECS_API
void ecs_strbuf_list_appendch(
ecs_strbuf_t *buffer,
char ch);
/* Append formatted string as a new element in list */
FLECS_API
void ecs_strbuf_list_append(
ecs_strbuf_t *buffer,
const char *fmt,
...);
/* Append string as a new element in list */
FLECS_API
void ecs_strbuf_list_appendstr(
ecs_strbuf_t *buffer,
const char *str);
/* Append string as a new element in list */
FLECS_API
void ecs_strbuf_list_appendstrn(
ecs_strbuf_t *buffer,
const char *str,
int32_t n);
FLECS_API
int32_t ecs_strbuf_written(
const ecs_strbuf_t *buffer);
#define ecs_strbuf_appendlit(buf, str)\
ecs_strbuf_appendstrn(buf, str, (int32_t)(sizeof(str) - 1))
#define ecs_strbuf_list_appendlit(buf, str)\
ecs_strbuf_list_appendstrn(buf, str, (int32_t)(sizeof(str) - 1))
#ifdef __cplusplus
}
#endif
#endif
/**
* @file os_api.h
* @brief Operating system abstraction API.
*
* This file contains the operating system abstraction API. The flecs core
* library avoids OS/runtime specific API calls as much as possible. Instead it
* provides an interface that can be implemented by applications.
*
* Examples for how to implement this interface can be found in the
* examples/os_api folder.
*/
#ifndef FLECS_OS_API_H
#define FLECS_OS_API_H
/**
* @defgroup c_os_api OS API
* @ingroup c
* Interface for providing OS specific functionality.
*
* @{
*/
#include <stdarg.h>
#include <errno.h>
#include <stdio.h>
#if defined(ECS_TARGET_WINDOWS)
#include <malloc.h>
#elif defined(ECS_TARGET_FREEBSD)
#include <stdlib.h>
#else
#include <alloca.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
typedef struct ecs_time_t {
uint32_t sec;
uint32_t nanosec;
} ecs_time_t;
/* Allocation counters */
extern int64_t ecs_os_api_malloc_count;
extern int64_t ecs_os_api_realloc_count;
extern int64_t ecs_os_api_calloc_count;
extern int64_t ecs_os_api_free_count;
/* Use handle types that _at least_ can store pointers */
typedef uintptr_t ecs_os_thread_t;
typedef uintptr_t ecs_os_cond_t;
typedef uintptr_t ecs_os_mutex_t;
typedef uintptr_t ecs_os_dl_t;
typedef uintptr_t ecs_os_sock_t;
/* 64 bit thread id */
typedef uint64_t ecs_os_thread_id_t;
/* Generic function pointer type */
typedef void (*ecs_os_proc_t)(void);
/* OS API init */
typedef
void (*ecs_os_api_init_t)(void);
/* OS API deinit */
typedef
void (*ecs_os_api_fini_t)(void);
/* Memory management */
typedef
void* (*ecs_os_api_malloc_t)(
ecs_size_t size);
typedef
void (*ecs_os_api_free_t)(
void *ptr);
typedef
void* (*ecs_os_api_realloc_t)(
void *ptr,
ecs_size_t size);
typedef
void* (*ecs_os_api_calloc_t)(
ecs_size_t size);
typedef
char* (*ecs_os_api_strdup_t)(
const char *str);
/* Threads */
typedef
void* (*ecs_os_thread_callback_t)(
void*);
typedef
ecs_os_thread_t (*ecs_os_api_thread_new_t)(
ecs_os_thread_callback_t callback,
void *param);
typedef
void* (*ecs_os_api_thread_join_t)(
ecs_os_thread_t thread);
typedef
ecs_os_thread_id_t (*ecs_os_api_thread_self_t)(void);
/* Tasks */
typedef
ecs_os_thread_t (*ecs_os_api_task_new_t)(
ecs_os_thread_callback_t callback,
void *param);
typedef
void* (*ecs_os_api_task_join_t)(
ecs_os_thread_t thread);
/* Atomic increment / decrement */
typedef
int32_t (*ecs_os_api_ainc_t)(
int32_t *value);
typedef
int64_t (*ecs_os_api_lainc_t)(
int64_t *value);
/* Mutex */
typedef
ecs_os_mutex_t (*ecs_os_api_mutex_new_t)(
void);
typedef
void (*ecs_os_api_mutex_lock_t)(
ecs_os_mutex_t mutex);
typedef
void (*ecs_os_api_mutex_unlock_t)(
ecs_os_mutex_t mutex);
typedef
void (*ecs_os_api_mutex_free_t)(
ecs_os_mutex_t mutex);
/* Condition variable */
typedef
ecs_os_cond_t (*ecs_os_api_cond_new_t)(
void);
typedef
void (*ecs_os_api_cond_free_t)(
ecs_os_cond_t cond);
typedef
void (*ecs_os_api_cond_signal_t)(
ecs_os_cond_t cond);
typedef
void (*ecs_os_api_cond_broadcast_t)(
ecs_os_cond_t cond);
typedef
void (*ecs_os_api_cond_wait_t)(
ecs_os_cond_t cond,
ecs_os_mutex_t mutex);
typedef
void (*ecs_os_api_sleep_t)(
int32_t sec,
int32_t nanosec);
typedef
void (*ecs_os_api_enable_high_timer_resolution_t)(
bool enable);
typedef
void (*ecs_os_api_get_time_t)(
ecs_time_t *time_out);
typedef
uint64_t (*ecs_os_api_now_t)(void);
/* Logging */
typedef
void (*ecs_os_api_log_t)(
int32_t level, /* Logging level */
const char *file, /* File where message was logged */
int32_t line, /* Line it was logged */
const char *msg);
/* Application termination */
typedef
void (*ecs_os_api_abort_t)(
void);
/* Dynamic libraries */
typedef
ecs_os_dl_t (*ecs_os_api_dlopen_t)(
const char *libname);
typedef
ecs_os_proc_t (*ecs_os_api_dlproc_t)(
ecs_os_dl_t lib,
const char *procname);
typedef
void (*ecs_os_api_dlclose_t)(
ecs_os_dl_t lib);
typedef
char* (*ecs_os_api_module_to_path_t)(
const char *module_id);
/* Prefix members of struct with 'ecs_' as some system headers may define
* macros for functions like "strdup", "log" or "_free" */
typedef struct ecs_os_api_t {
/* API init / deinit */
ecs_os_api_init_t init_;
ecs_os_api_fini_t fini_;
/* Memory management */
ecs_os_api_malloc_t malloc_;
ecs_os_api_realloc_t realloc_;
ecs_os_api_calloc_t calloc_;
ecs_os_api_free_t free_;
/* Strings */
ecs_os_api_strdup_t strdup_;
/* Threads */
ecs_os_api_thread_new_t thread_new_;
ecs_os_api_thread_join_t thread_join_;
ecs_os_api_thread_self_t thread_self_;
/* Tasks */
ecs_os_api_thread_new_t task_new_;
ecs_os_api_thread_join_t task_join_;
/* Atomic increment / decrement */
ecs_os_api_ainc_t ainc_;
ecs_os_api_ainc_t adec_;
ecs_os_api_lainc_t lainc_;
ecs_os_api_lainc_t ladec_;
/* Mutex */
ecs_os_api_mutex_new_t mutex_new_;
ecs_os_api_mutex_free_t mutex_free_;
ecs_os_api_mutex_lock_t mutex_lock_;
ecs_os_api_mutex_lock_t mutex_unlock_;
/* Condition variable */
ecs_os_api_cond_new_t cond_new_;
ecs_os_api_cond_free_t cond_free_;
ecs_os_api_cond_signal_t cond_signal_;
ecs_os_api_cond_broadcast_t cond_broadcast_;
ecs_os_api_cond_wait_t cond_wait_;
/* Time */
ecs_os_api_sleep_t sleep_;
ecs_os_api_now_t now_;
ecs_os_api_get_time_t get_time_;
/* Logging */
ecs_os_api_log_t log_; /* Logging function. The level should be interpreted as: */
/* >0: Debug tracing. Only enabled in debug builds. */
/* 0: Tracing. Enabled in debug/release builds. */
/* -2: Warning. An issue occurred, but operation was successful. */
/* -3: Error. An issue occurred, and operation was unsuccessful. */
/* -4: Fatal. An issue occurred, and application must quit. */
/* Application termination */
ecs_os_api_abort_t abort_;
/* Dynamic library loading */
ecs_os_api_dlopen_t dlopen_;
ecs_os_api_dlproc_t dlproc_;
ecs_os_api_dlclose_t dlclose_;
/* Overridable function that translates from a logical module id to a
* shared library filename */
ecs_os_api_module_to_path_t module_to_dl_;
/* Overridable function that translates from a logical module id to a
* path that contains module-specif resources or assets */
ecs_os_api_module_to_path_t module_to_etc_;
/* Trace level */
int32_t log_level_;
/* Trace indentation */
int32_t log_indent_;
/* Last error code */
int32_t log_last_error_;
/* Last recorded timestamp */
int64_t log_last_timestamp_;
/* OS API flags */
ecs_flags32_t flags_;
/* File used for logging output (hint, log_ decides where to write) */
FILE *log_out_;
} ecs_os_api_t;
FLECS_API
extern ecs_os_api_t ecs_os_api;
FLECS_API
void ecs_os_init(void);
FLECS_API
void ecs_os_fini(void);
FLECS_API
void ecs_os_set_api(
ecs_os_api_t *os_api);
FLECS_API
ecs_os_api_t ecs_os_get_api(void);
FLECS_API
void ecs_os_set_api_defaults(void);
/* Memory management */
#ifndef ecs_os_malloc
#define ecs_os_malloc(size) ecs_os_api.malloc_(size)
#endif
#ifndef ecs_os_free
#define ecs_os_free(ptr) ecs_os_api.free_(ptr)
#endif
#ifndef ecs_os_realloc
#define ecs_os_realloc(ptr, size) ecs_os_api.realloc_(ptr, size)
#endif
#ifndef ecs_os_calloc
#define ecs_os_calloc(size) ecs_os_api.calloc_(size)
#endif
#if defined(ECS_TARGET_WINDOWS)
#define ecs_os_alloca(size) _alloca((size_t)(size))
#else
#define ecs_os_alloca(size) alloca((size_t)(size))
#endif
#define ecs_os_malloc_t(T) ECS_CAST(T*, ecs_os_malloc(ECS_SIZEOF(T)))
#define ecs_os_malloc_n(T, count) ECS_CAST(T*, ecs_os_malloc(ECS_SIZEOF(T) * (count)))
#define ecs_os_calloc_t(T) ECS_CAST(T*, ecs_os_calloc(ECS_SIZEOF(T)))
#define ecs_os_calloc_n(T, count) ECS_CAST(T*, ecs_os_calloc(ECS_SIZEOF(T) * (count)))
#define ecs_os_realloc_t(ptr, T) ECS_CAST(T*, ecs_os_realloc(ptr, ECS_SIZEOF(T)))
#define ecs_os_realloc_n(ptr, T, count) ECS_CAST(T*, ecs_os_realloc(ptr, ECS_SIZEOF(T) * (count)))
#define ecs_os_alloca_t(T) ECS_CAST(T*, ecs_os_alloca(ECS_SIZEOF(T)))
#define ecs_os_alloca_n(T, count) ECS_CAST(T*, ecs_os_alloca(ECS_SIZEOF(T) * (count)))
/* Strings */
#ifndef ecs_os_strdup
#define ecs_os_strdup(str) ecs_os_api.strdup_(str)
#endif
#ifdef __cplusplus
#define ecs_os_strlen(str) static_cast<ecs_size_t>(strlen(str))
#define ecs_os_strncmp(str1, str2, num) strncmp(str1, str2, static_cast<size_t>(num))
#define ecs_os_memcmp(ptr1, ptr2, num) memcmp(ptr1, ptr2, static_cast<size_t>(num))
#define ecs_os_memcpy(ptr1, ptr2, num) memcpy(ptr1, ptr2, static_cast<size_t>(num))
#define ecs_os_memset(ptr, value, num) memset(ptr, value, static_cast<size_t>(num))
#define ecs_os_memmove(dst, src, size) memmove(dst, src, static_cast<size_t>(size))
#else
#define ecs_os_strlen(str) (ecs_size_t)strlen(str)
#define ecs_os_strncmp(str1, str2, num) strncmp(str1, str2, (size_t)(num))
#define ecs_os_memcmp(ptr1, ptr2, num) memcmp(ptr1, ptr2, (size_t)(num))
#define ecs_os_memcpy(ptr1, ptr2, num) memcpy(ptr1, ptr2, (size_t)(num))
#define ecs_os_memset(ptr, value, num) memset(ptr, value, (size_t)(num))
#define ecs_os_memmove(dst, src, size) memmove(dst, src, (size_t)(size))
#endif
#define ecs_os_memcpy_t(ptr1, ptr2, T) ecs_os_memcpy(ptr1, ptr2, ECS_SIZEOF(T))
#define ecs_os_memcpy_n(ptr1, ptr2, T, count) ecs_os_memcpy(ptr1, ptr2, ECS_SIZEOF(T) * count)
#define ecs_os_memcmp_t(ptr1, ptr2, T) ecs_os_memcmp(ptr1, ptr2, ECS_SIZEOF(T))
#define ecs_os_memmove_t(ptr1, ptr2, T) ecs_os_memmove(ptr1, ptr2, ECS_SIZEOF(T))
#define ecs_os_memmove_n(ptr1, ptr2, T, count) ecs_os_memmove(ptr1, ptr2, ECS_SIZEOF(T) * count)
#define ecs_os_memmove_t(ptr1, ptr2, T) ecs_os_memmove(ptr1, ptr2, ECS_SIZEOF(T))
#define ecs_os_strcmp(str1, str2) strcmp(str1, str2)
#define ecs_os_memset_t(ptr, value, T) ecs_os_memset(ptr, value, ECS_SIZEOF(T))
#define ecs_os_memset_n(ptr, value, T, count) ecs_os_memset(ptr, value, ECS_SIZEOF(T) * count)
#define ecs_os_zeromem(ptr) ecs_os_memset(ptr, 0, ECS_SIZEOF(*ptr))
#define ecs_os_memdup_t(ptr, T) ecs_os_memdup(ptr, ECS_SIZEOF(T))
#define ecs_os_memdup_n(ptr, T, count) ecs_os_memdup(ptr, ECS_SIZEOF(T) * count)
#define ecs_offset(ptr, T, index)\
ECS_CAST(T*, ECS_OFFSET(ptr, ECS_SIZEOF(T) * index))
#if !defined(ECS_TARGET_POSIX) && !defined(ECS_TARGET_MINGW)
#define ecs_os_strcat(str1, str2) strcat_s(str1, INT_MAX, str2)
#define ecs_os_sprintf(ptr, ...) sprintf_s(ptr, INT_MAX, __VA_ARGS__)
#define ecs_os_vsprintf(ptr, fmt, args) vsprintf_s(ptr, INT_MAX, fmt, args)
#define ecs_os_strcpy(str1, str2) strcpy_s(str1, INT_MAX, str2)
#ifdef __cplusplus
#define ecs_os_strncpy(str1, str2, num) strncpy_s(str1, INT_MAX, str2, static_cast<size_t>(num))
#else
#define ecs_os_strncpy(str1, str2, num) strncpy_s(str1, INT_MAX, str2, (size_t)(num))
#endif
#else
#define ecs_os_strcat(str1, str2) strcat(str1, str2)
#define ecs_os_sprintf(ptr, ...) sprintf(ptr, __VA_ARGS__)
#define ecs_os_vsprintf(ptr, fmt, args) vsprintf(ptr, fmt, args)
#define ecs_os_strcpy(str1, str2) strcpy(str1, str2)
#ifdef __cplusplus
#define ecs_os_strncpy(str1, str2, num) strncpy(str1, str2, static_cast<size_t>(num))
#else
#define ecs_os_strncpy(str1, str2, num) strncpy(str1, str2, (size_t)(num))
#endif
#endif
/* Files */
#ifndef ECS_TARGET_POSIX
#define ecs_os_fopen(result, file, mode) fopen_s(result, file, mode)
#else
#define ecs_os_fopen(result, file, mode) (*(result)) = fopen(file, mode)
#endif
/* Threads */
#define ecs_os_thread_new(callback, param) ecs_os_api.thread_new_(callback, param)
#define ecs_os_thread_join(thread) ecs_os_api.thread_join_(thread)
#define ecs_os_thread_self() ecs_os_api.thread_self_()
/* Tasks */
#define ecs_os_task_new(callback, param) ecs_os_api.task_new_(callback, param)
#define ecs_os_task_join(thread) ecs_os_api.task_join_(thread)
/* Atomic increment / decrement */
#define ecs_os_ainc(value) ecs_os_api.ainc_(value)
#define ecs_os_adec(value) ecs_os_api.adec_(value)
#define ecs_os_lainc(value) ecs_os_api.lainc_(value)
#define ecs_os_ladec(value) ecs_os_api.ladec_(value)
/* Mutex */
#define ecs_os_mutex_new() ecs_os_api.mutex_new_()
#define ecs_os_mutex_free(mutex) ecs_os_api.mutex_free_(mutex)
#define ecs_os_mutex_lock(mutex) ecs_os_api.mutex_lock_(mutex)
#define ecs_os_mutex_unlock(mutex) ecs_os_api.mutex_unlock_(mutex)
/* Condition variable */
#define ecs_os_cond_new() ecs_os_api.cond_new_()
#define ecs_os_cond_free(cond) ecs_os_api.cond_free_(cond)
#define ecs_os_cond_signal(cond) ecs_os_api.cond_signal_(cond)
#define ecs_os_cond_broadcast(cond) ecs_os_api.cond_broadcast_(cond)
#define ecs_os_cond_wait(cond, mutex) ecs_os_api.cond_wait_(cond, mutex)
/* Time */
#define ecs_os_sleep(sec, nanosec) ecs_os_api.sleep_(sec, nanosec)
#define ecs_os_now() ecs_os_api.now_()
#define ecs_os_get_time(time_out) ecs_os_api.get_time_(time_out)
/* Logging */
FLECS_API
void ecs_os_dbg(const char *file, int32_t line, const char *msg);
FLECS_API
void ecs_os_trace(const char *file, int32_t line, const char *msg);
FLECS_API
void ecs_os_warn(const char *file, int32_t line, const char *msg);
FLECS_API
void ecs_os_err(const char *file, int32_t line, const char *msg);
FLECS_API
void ecs_os_fatal(const char *file, int32_t line, const char *msg);
FLECS_API
const char* ecs_os_strerror(int err);
FLECS_API
void ecs_os_strset(char **str, const char *value);
#ifdef FLECS_ACCURATE_COUNTERS
#define ecs_os_inc(v) (ecs_os_ainc(v))
#define ecs_os_linc(v) (ecs_os_lainc(v))
#define ecs_os_dec(v) (ecs_os_adec(v))
#define ecs_os_ldec(v) (ecs_os_ladec(v))
#else
#define ecs_os_inc(v) (++(*v))
#define ecs_os_linc(v) (++(*v))
#define ecs_os_dec(v) (--(*v))
#define ecs_os_ldec(v) (--(*v))
#endif
#ifdef ECS_TARGET_MINGW
/* mingw bug: without this a conversion error is thrown, but isnan/isinf should
* accept float, double and long double. */
#define ecs_os_isnan(val) (isnan((float)val))
#define ecs_os_isinf(val) (isinf((float)val))
#else
#define ecs_os_isnan(val) (isnan(val))
#define ecs_os_isinf(val) (isinf(val))
#endif
/* Application termination */
#define ecs_os_abort() ecs_os_api.abort_()
/* Dynamic libraries */
#define ecs_os_dlopen(libname) ecs_os_api.dlopen_(libname)
#define ecs_os_dlproc(lib, procname) ecs_os_api.dlproc_(lib, procname)
#define ecs_os_dlclose(lib) ecs_os_api.dlclose_(lib)
/* Module id translation */
#define ecs_os_module_to_dl(lib) ecs_os_api.module_to_dl_(lib)
#define ecs_os_module_to_etc(lib) ecs_os_api.module_to_etc_(lib)
/* Sleep with floating point time */
FLECS_API
void ecs_sleepf(
double t);
/* Measure time since provided timestamp */
FLECS_API
double ecs_time_measure(
ecs_time_t *start);
/* Calculate difference between two timestamps */
FLECS_API
ecs_time_t ecs_time_sub(
ecs_time_t t1,
ecs_time_t t2);
/* Convert time value to a double */
FLECS_API
double ecs_time_to_double(
ecs_time_t t);
FLECS_API
void* ecs_os_memdup(
const void *src,
ecs_size_t size);
/** Are heap functions available? */
FLECS_API
bool ecs_os_has_heap(void);
/** Are threading functions available? */
FLECS_API
bool ecs_os_has_threading(void);
/** Are task functions available? */
FLECS_API
bool ecs_os_has_task_support(void);
/** Are time functions available? */
FLECS_API
bool ecs_os_has_time(void);
/** Are logging functions available? */
FLECS_API
bool ecs_os_has_logging(void);
/** Are dynamic library functions available? */
FLECS_API
bool ecs_os_has_dl(void);
/** Are module path functions available? */
FLECS_API
bool ecs_os_has_modules(void);
#ifdef __cplusplus
}
#endif
/** @} */
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup api_types API types
* Public API types.
*
* @{
*/
/**
* @defgroup core_types Core API Types
* Types for core API objects.
*
* @{
*/
/** Ids are the things that can be added to an entity.
* An id can be an entity or pair, and can have optional id flags. */
typedef uint64_t ecs_id_t;
/** An entity identifier.
* Entity ids consist out of a number unique to the entity in the lower 32 bits,
* and a counter used to track entity liveliness in the upper 32 bits. When an
* id is recycled, its generation count is increased. This causes recycled ids
* to be very large (>4 billion), which is normal. */
typedef ecs_id_t ecs_entity_t;
/** A type is a list of (component) ids.
* Types are used to communicate the "type" of an entity. In most type systems a
* typeof operation returns a single type. In ECS however, an entity can have
* multiple components, which is why an ECS type consists of a vector of ids.
*
* The component ids of a type are sorted, which ensures that it doesn't matter
* in which order components are added to an entity. For example, if adding
* Position then Velocity would result in type [Position, Velocity], first
* adding Velocity then Position would also result in type [Position, Velocity].
*
* Entities are grouped together by type in the ECS storage in tables. The
* storage has exactly one table per unique type that is created by the
* application that stores all entities and components for that type. This is
* also referred to as an archetype.
*/
typedef struct {
ecs_id_t *array;
int32_t count;
} ecs_type_t;
/** A world is the container for all ECS data and supporting features.
* Applications can have multiple worlds, though in most cases will only need
* one. Worlds are isolated from each other, and can have separate sets of
* systems, components, modules etc.
*
* If an application has multiple worlds with overlapping components, it is
* common (though not strictly required) to use the same component ids across
* worlds, which can be achieved by declaring a global component id variable.
* To do this in the C API, see the entities/fwd_component_decl example. The
* C++ API automatically synchronizes component ids between worlds.
*
* Component id conflicts between worlds can occur when a world has already used
* an id for something else. There are a few ways to avoid this:
*
* - Ensure to register the same components in each world, in the same order.
* - Create a dummy world in which all components are preregistered which
* initializes the global id variables.
*
* In some use cases, typically when writing tests, multiple worlds are created
* and deleted with different components, registered in different order. To
* ensure isolation between tests, the C++ API has a `flecs::reset` function
* that forces the API to ignore the old component ids. */
typedef struct ecs_world_t ecs_world_t;
/** A table stores entities and components for a specific type. */
typedef struct ecs_table_t ecs_table_t;
/** A term is a single element in a query. */
typedef struct ecs_term_t ecs_term_t;
/** A filter is an iterable data structure that describes a query.
* Filters are used by the various query implementations in Flecs, like queries,
* observers and rules, to describe a query. Filters themselves can also be
* iterated. */
typedef struct ecs_filter_t ecs_filter_t;
/** A query that caches its results.
* Queries are the fastest mechanism for finding and iterating over entities.
* Queries cache results as a list of matching tables (vs. individual entities).
*
* This has several advantages:
* - Matching is only performed when new tables are created, which is infrequent
* - Iterating a query just walks over the cache, no actual searching is needed
* - Iteration is table-based, which allows for direct iteration of underlying
* component arrays, providing good cache locality.
*
* While queries are the fastest mechanism to iterate entities, they are slower
* to create than other mechanisms, as a result of having to build the cache
* first. For this reason queries are best suited for use cases where a single
* query can be reused many times (like is the case for systems).
*
* For ad-hoc queries it is recommended to use filters or rules instead, which
* are slower to iterate, but much faster to create. Applications should at all
* times avoid frequent creation/deletion of queries. */
typedef struct ecs_query_t ecs_query_t;
/** A rule is a query with advanced graph traversal features.
* Rules are fast uncached queries with support for advanced graph features such
* as the usage of query variables. A simple example of a rule that matches all
* spaceship entities docked to a planet:
*
* SpaceShip, (DockedTo, $planet), Planet($planet)
*
* Here, the rule traverses the DockedTo relationship, and matches Planet on the
* target of this relationship. Through the usage of variables rules can match
* arbitrary patterns against entity graphs. Other features supported
* exclusively by rules are:
* - Component inheritance
* - Transitivity
*
* Rules have similar iteration performance to filters, but are slower than
* queries. Rules and filters will eventually be merged into a single query
* implementation. Features still lacking for rules are:
* - Up traversal
* - AndFrom, OrFrom, NotFrom operators
*/
typedef struct ecs_rule_t ecs_rule_t;
/** An observer is a system that is invoked when an event matches its query.
* Observers allow applications to respond to specific events, such as adding or
* removing a component. Observers are created by both specifying a query and
* a list of event kinds that should be listened for. An example of an observer
* that triggers when a Position component is added to an entity (in C++):
*
* @code
* world.observer<Position>()
* .event(flecs::OnAdd)
* .each([](Position& p) {
* // called when Position is added to an entity
* });
* @endcode
*
* Observer queries can be as complex as filters. Observers only trigger when
* the source of the event matches the full observer query. For example, an
* OnAdd observer for Position, Velocity will only trigger after both components
* have been added to the entity. */
typedef struct ecs_observer_t ecs_observer_t;
/** An observable produces events that can be listened for by an observer.
* Currently only the world is observable. In the future, queries will become
* observable objects as well. */
typedef struct ecs_observable_t ecs_observable_t;
/* Type used for iterating iterable objects.
* Iterators are a common interface across iterable objects (world, filters,
* rules, queries, systems, observers) to provide applications with information
* about the currently iterated result, and to store any state required for the
* iteration. */
typedef struct ecs_iter_t ecs_iter_t;
/** A ref is a fast way to fetch a component for a specific entity.
* Refs are a faster alternative to repeatedly calling ecs_get() for the same
* entity/component combination. When comparing the performance of getting a ref
* to calling ecs_get(), a ref is typically 3-5x faster.
*
* Refs achieve this performance by caching internal data structures associated
* with the entity and component on the ecs_ref_t object that otherwise would
* have to be looked up. */
typedef struct ecs_ref_t ecs_ref_t;
/** Type hooks are callbacks associated with component lifecycle events.
* Typical examples of lifecycle events are construction, destruction, copying
* and moving of components. */
typedef struct ecs_type_hooks_t ecs_type_hooks_t;
/** Type information.
* Contains information about a (component) type, such as its size and
* alignment and type hooks. */
typedef struct ecs_type_info_t ecs_type_info_t;
/** Information about an entity, like its table and row. */
typedef struct ecs_record_t ecs_record_t;
/** Information about a (component) id, such as type info and tables with the id */
typedef struct ecs_id_record_t ecs_id_record_t;
/** Information about where in a table a specific (component) id is stored. */
typedef struct ecs_table_record_t ecs_table_record_t;
/** A poly object.
* A poly (short for polymorph) object is an object that has a variable list of
* capabilities, determined by a mixin table. This is the current list of types
* in the flecs API that can be used as an ecs_poly_t:
*
* - ecs_world_t
* - ecs_stage_t
* - ecs_query_t
* - ecs_filter_t
* - ecs_rule_t
* - (more to come)
*
* Functions that accept an ecs_poly_t argument can accept objects of these
* types. If the object does not have the requested mixin the API will throw an
* assert.
*
* The poly/mixin framework enables partially overlapping features to be
* implemented once, and enables objects of different types to interact with
* each other depending on what mixins they have, rather than their type
* (in some ways it's like a mini-ECS). Additionally, each poly object has a
* header that enables the API to do sanity checking on the input arguments.
*/
typedef void ecs_poly_t;
/** Type that stores poly mixins */
typedef struct ecs_mixins_t ecs_mixins_t;
/** Header for ecs_poly_t objects. */
typedef struct ecs_header_t {
int32_t magic; /* Magic number verifying it's a flecs object */
int32_t type; /* Magic number indicating which type of flecs object */
ecs_mixins_t *mixins; /* Table with offsets to (optional) mixins */
} ecs_header_t;
/** @} */
/**
* @defgroup function_types Function types.
* Function callback types.
*
* @{
*/
/** Function prototype for runnables (systems, observers).
* The run callback overrides the default behavior for iterating through the
* results of a runnable object.
*
* The default runnable iterates the iterator, and calls an iter_action (see
* below) for each returned result.
*
* @param it The iterator to be iterated by the runnable.
*/
typedef void (*ecs_run_action_t)(
ecs_iter_t *it);
/** Function prototype for iterables.
* A system may invoke a callback multiple times, typically once for each
* matched table.
*
* @param it The iterator containing the data for the current match.
*/
typedef void (*ecs_iter_action_t)(
ecs_iter_t *it);
/** Function prototype for creating an iterator from a poly.
* Used to create iterators from poly objects with the iterable mixin. When a
* filter is provided, an array of two iterators must be passed to the function.
* This allows the mixin implementation to create a chained iterator when
* necessary, which requires two iterator objects.
*
* @param world The world or stage for which to create the iterator.
* @param iterable An iterable poly object.
* @param it The iterator to create (out parameter)
* @param filter Optional term to filter results.
*/
typedef void (*ecs_iter_init_action_t)(
const ecs_world_t *world,
const ecs_poly_t *iterable,
ecs_iter_t *it,
ecs_term_t *filter);
/** Function prototype for iterating an iterator.
* Stored inside initialized iterators. This allows an application to iterate
* an iterator without needing to know what created it.
*
* @param it The iterator to iterate.
* @return True if iterator has no more results, false if it does.
*/
typedef bool (*ecs_iter_next_action_t)(
ecs_iter_t *it);
/** Function prototype for freeing an iterator.
* Free iterator resources.
*
* @param it The iterator to free.
*/
typedef void (*ecs_iter_fini_action_t)(
ecs_iter_t *it);
/** Callback used for comparing components */
typedef int (*ecs_order_by_action_t)(
ecs_entity_t e1,
const void *ptr1,
ecs_entity_t e2,
const void *ptr2);
/** Callback used for sorting the entire table of components */
typedef void (*ecs_sort_table_action_t)(
ecs_world_t* world,
ecs_table_t* table,
ecs_entity_t* entities,
void* ptr,
int32_t size,
int32_t lo,
int32_t hi,
ecs_order_by_action_t order_by);
/** Callback used for grouping tables in a query */
typedef uint64_t (*ecs_group_by_action_t)(
ecs_world_t *world,
ecs_table_t *table,
ecs_id_t group_id,
void *ctx);
/* Callback invoked when a query creates a new group. */
typedef void* (*ecs_group_create_action_t)(
ecs_world_t *world,
uint64_t group_id,
void *group_by_ctx); /* from ecs_query_desc_t */
/* Callback invoked when a query deletes an existing group. */
typedef void (*ecs_group_delete_action_t)(
ecs_world_t *world,
uint64_t group_id,
void *group_ctx, /* return value from ecs_group_create_action_t */
void *group_by_ctx); /* from ecs_query_desc_t */
/** Initialization action for modules */
typedef void (*ecs_module_action_t)(
ecs_world_t *world);
/** Action callback on world exit */
typedef void (*ecs_fini_action_t)(
ecs_world_t *world,
void *ctx);
/** Function to cleanup context data */
typedef void (*ecs_ctx_free_t)(
void *ctx);
/** Callback used for sorting values */
typedef int (*ecs_compare_action_t)(
const void *ptr1,
const void *ptr2);
/** Callback used for hashing values */
typedef uint64_t (*ecs_hash_value_action_t)(
const void *ptr);
/** Constructor/destructor callback */
typedef void (*ecs_xtor_t)(
void *ptr,
int32_t count,
const ecs_type_info_t *type_info);
/** Copy is invoked when a component is copied into another component. */
typedef void (*ecs_copy_t)(
void *dst_ptr,
const void *src_ptr,
int32_t count,
const ecs_type_info_t *type_info);
/** Move is invoked when a component is moved to another component. */
typedef void (*ecs_move_t)(
void *dst_ptr,
void *src_ptr,
int32_t count,
const ecs_type_info_t *type_info);
/* Destructor function for poly objects */
typedef void (*ecs_poly_dtor_t)(
ecs_poly_t *poly);
/** @} */
/**
* @defgroup mixins Poly mixin types.
* Mixin types for poly mechanism.
*
* @{
*/
/** Iterable mixin.
* Allows its container to be iterated. */
typedef struct ecs_iterable_t {
ecs_iter_init_action_t init; /**< Callback that creates iterator. */
} ecs_iterable_t;
/** @} */
/**
* @defgroup query_types Query descriptor types.
* Types used to describe queries.
*
* @{
*/
/** Specify read/write access for term */
typedef enum ecs_inout_kind_t {
EcsInOutDefault, /**< InOut for regular terms, In for shared terms */
EcsInOutNone, /**< Term is neither read nor written */
EcsInOut, /**< Term is both read and written */
EcsIn, /**< Term is only read */
EcsOut, /**< Term is only written */
} ecs_inout_kind_t;
/** Specify operator for term */
typedef enum ecs_oper_kind_t {
EcsAnd, /**< The term must match */
EcsOr, /**< One of the terms in an or chain must match */
EcsNot, /**< The term must not match */
EcsOptional, /**< The term may match */
EcsAndFrom, /**< Term must match all components from term id */
EcsOrFrom, /**< Term must match at least one component from term id */
EcsNotFrom, /**< Term must match none of the components from term id */
} ecs_oper_kind_t;
/* Term id flags */
#define EcsSelf (1u << 1) /**< Match on self */
#define EcsUp (1u << 2) /**< Match by traversing upwards */
#define EcsDown (1u << 3) /**< Match by traversing downwards (derived, cannot be set) */
#define EcsTraverseAll (1u << 4) /**< Match all entities encountered through traversal */
#define EcsCascade (1u << 5) /**< Sort results breadth first */
#define EcsDesc (1u << 6) /**< Iterate groups in descending order */
#define EcsParent (1u << 7) /**< Short for up(ChildOf) */
#define EcsIsVariable (1u << 8) /**< Term id is a variable */
#define EcsIsEntity (1u << 9) /**< Term id is an entity */
#define EcsIsName (1u << 10) /**< Term id is a name (don't attempt to lookup as entity) */
#define EcsFilter (1u << 11) /**< Prevent observer from triggering on term */
#define EcsTraverseFlags (EcsUp|EcsDown|EcsTraverseAll|EcsSelf|EcsCascade|EcsDesc|EcsParent)
/* Term flags discovered & set during filter creation. Mostly used internally to
* store information relevant to queries. */
#define EcsTermMatchAny (1u << 0)
#define EcsTermMatchAnySrc (1u << 1)
#define EcsTermSrcFirstEq (1u << 2)
#define EcsTermSrcSecondEq (1u << 3)
#define EcsTermTransitive (1u << 4)
#define EcsTermReflexive (1u << 5)
#define EcsTermIdInherited (1u << 6)
#define EcsTermIsTrivial (1u << 7)
#define EcsTermNoData (1u << 8)
/* Term flags used for term iteration */
#define EcsTermMatchDisabled (1u << 7)
#define EcsTermMatchPrefab (1u << 8)
/** Type that describes a single identifier in a term */
typedef struct ecs_term_id_t {
ecs_entity_t id; /**< Entity id. If left to 0 and flags does not
* specify whether id is an entity or a variable
* the id will be initialized to EcsThis.
* To explicitly set the id to 0, leave the id
* member to 0 and set EcsIsEntity in flags. */
const char *name; /**< Name. This can be either the variable name
* (when the EcsIsVariable flag is set) or an
* entity name. When ecs_term_t::move is true,
* the API assumes ownership over the string and
* will free it when the term is destroyed. */
ecs_entity_t trav; /**< Relationship to traverse when looking for the
* component. The relationship must have
* the Traversable property. Default is IsA. */
ecs_flags32_t flags; /**< Term flags */
} ecs_term_id_t;
/** Type that describes a term (single element in a query) */
struct ecs_term_t {
ecs_id_t id; /**< Component id to be matched by term. Can be
* set directly, or will be populated from the
* first/second members, which provide more
* flexibility. */
ecs_term_id_t src; /**< Source of term */
ecs_term_id_t first; /**< Component or first element of pair */
ecs_term_id_t second; /**< Second element of pair */
ecs_inout_kind_t inout; /**< Access to contents matched by term */
ecs_oper_kind_t oper; /**< Operator of term */
ecs_id_t id_flags; /**< Id flags of term id */
char *name; /**< Name of term */
int32_t field_index; /**< Index of field for term in iterator */
ecs_id_record_t *idr; /**< Cached pointer to internal index */
ecs_flags16_t flags; /**< Flags that help eval, set by ecs_filter_init */
bool move; /**< Used by internals */
};
/** Use $this variable to initialize user-allocated filter object */
FLECS_API extern ecs_filter_t ECS_FILTER_INIT;
/** Filters allow for ad-hoc quick filtering of entity tables. */
struct ecs_filter_t {
ecs_header_t hdr;
int8_t term_count; /**< Number of elements in terms array */
int8_t field_count; /**< Number of fields in iterator for filter */
ecs_flags32_t flags; /**< Filter flags */
ecs_flags64_t data_fields; /**< Bitset with fields that have data */
ecs_term_t *terms; /**< Array containing terms for filter */
char *variable_names[1]; /**< Placeholder variable names array */
int32_t *sizes; /**< Field size (same for each result) */
ecs_id_t *ids; /**< Array with field ids */
/* Mixins */
ecs_entity_t entity; /**< Entity associated with filter (optional) */
ecs_iterable_t iterable; /**< Iterable mixin */
ecs_poly_dtor_t dtor; /**< Dtor mixin */
ecs_world_t *world; /**< World mixin */
};
/* An observer reacts to events matching a filter */
struct ecs_observer_t {
ecs_header_t hdr;
ecs_filter_t filter; /**< Query for observer */
/* Observer events */
ecs_entity_t events[FLECS_EVENT_DESC_MAX];
int32_t event_count;
ecs_iter_action_t callback; /**< See ecs_observer_desc_t::callback */
ecs_run_action_t run; /**< See ecs_observer_desc_t::run */
void *ctx; /**< Callback context */
void *binding_ctx; /**< Binding context (for language bindings) */
ecs_ctx_free_t ctx_free; /**< Callback to free ctx */
ecs_ctx_free_t binding_ctx_free; /**< Callback to free binding_ctx */
ecs_observable_t *observable; /**< Observable for observer */
int32_t *last_event_id; /**< Last handled event id */
int32_t last_event_id_storage;
ecs_id_t register_id; /**< Id observer is registered with (single term observers only) */
int32_t term_index; /**< Index of the term in parent observer (single term observers only) */
bool is_monitor; /**< If true, the observer only triggers when the
* filter did not match with the entity before
* the event happened. */
bool is_multi; /**< If true, the observer triggers on more than one term */
/* Mixins */
ecs_poly_dtor_t dtor;
};
/** @} */
/** Type that contains component lifecycle callbacks.
*
* @ingroup components
*/
struct ecs_type_hooks_t {
ecs_xtor_t ctor; /**< ctor */
ecs_xtor_t dtor; /**< dtor */
ecs_copy_t copy; /**< copy assignment */
ecs_move_t move; /**< move assignment */
/** Ctor + copy */
ecs_copy_t copy_ctor;
/** Ctor + move */
ecs_move_t move_ctor;
/** Ctor + move + dtor (or move_ctor + dtor).
* This combination is typically used when a component is moved from one
* location to a new location, like when it is moved to a new table. If
* not set explicitly it will be derived from other callbacks. */
ecs_move_t ctor_move_dtor;
/** Move + dtor.
* This combination is typically used when a component is moved from one
* location to an existing location, like what happens during a remove. If
* not set explicitly it will be derived from other callbacks. */
ecs_move_t move_dtor;
/** Callback that is invoked when an instance of a component is added. This
* callback is invoked before triggers are invoked. */
ecs_iter_action_t on_add;
/** Callback that is invoked when an instance of the component is set. This
* callback is invoked before triggers are invoked, and enable the component
* to respond to changes on itself before others can. */
ecs_iter_action_t on_set;
/** Callback that is invoked when an instance of the component is removed.
* This callback is invoked after the triggers are invoked, and before the
* destructor is invoked. */
ecs_iter_action_t on_remove;
void *ctx; /**< User defined context */
void *binding_ctx; /**< Language binding context */
ecs_ctx_free_t ctx_free; /**< Callback to free ctx */
ecs_ctx_free_t binding_ctx_free; /**< Callback to free binding_ctx */
};
/** Type that contains component information (passed to ctors/dtors/...)
*
* @ingroup components
*/
struct ecs_type_info_t {
ecs_size_t size; /**< Size of type */
ecs_size_t alignment; /**< Alignment of type */
ecs_type_hooks_t hooks; /**< Type hooks */
ecs_entity_t component; /**< Handle to component (do not set) */
const char *name; /**< Type name. */
};
/**
* @file api_types.h
* @brief Supporting types for the public API.
*
* This file contains types that are typically not used by an application but
* support the public API, and therefore must be exposed. This header should not
* be included by itself.
*/
#ifndef FLECS_API_TYPES_H
#define FLECS_API_TYPES_H
#ifdef __cplusplus
extern "C" {
#endif
////////////////////////////////////////////////////////////////////////////////
//// Opaque types
////////////////////////////////////////////////////////////////////////////////
/** A stage enables modification while iterating and from multiple threads */
typedef struct ecs_stage_t ecs_stage_t;
/** Table data */
typedef struct ecs_data_t ecs_data_t;
/* Switch list */
typedef struct ecs_switch_t ecs_switch_t;
/* Cached query table data */
typedef struct ecs_query_table_match_t ecs_query_table_match_t;
////////////////////////////////////////////////////////////////////////////////
//// Non-opaque types
////////////////////////////////////////////////////////////////////////////////
/** Mixin for emitting events to triggers/observers */
/** All observers for a specific event */
typedef struct ecs_event_record_t {
struct ecs_event_id_record_t *any;
struct ecs_event_id_record_t *wildcard;
struct ecs_event_id_record_t *wildcard_pair;
ecs_map_t event_ids; /* map<id, ecs_event_id_record_t> */
ecs_entity_t event;
} ecs_event_record_t;
struct ecs_observable_t {
ecs_event_record_t on_add;
ecs_event_record_t on_remove;
ecs_event_record_t on_set;
ecs_event_record_t un_set;
ecs_event_record_t on_wildcard;
ecs_sparse_t events; /* sparse<event, ecs_event_record_t> */
};
/** Record for entity index */
struct ecs_record_t {
ecs_id_record_t *idr; /* Id record to (*, entity) for target entities */
ecs_table_t *table; /* Identifies a type (and table) in world */
uint32_t row; /* Table row of the entity */
int32_t dense; /* Index in dense array */
};
/** Range in table */
typedef struct ecs_table_range_t {
ecs_table_t *table;
int32_t offset; /* Leave both members to 0 to cover entire table */
int32_t count;
} ecs_table_range_t;
/** Value of query variable */
typedef struct ecs_var_t {
ecs_table_range_t range; /* Set when variable stores a range of entities */
ecs_entity_t entity; /* Set when variable stores single entity */
/* Most entities can be stored as a range by setting range.count to 1,
* however in order to also be able to store empty entities in variables,
* a separate entity member is needed. Both range and entity may be set at
* the same time, as long as they are consistent. */
} ecs_var_t;
/** Cached reference. */
struct ecs_ref_t {
ecs_entity_t entity; /* Entity */
ecs_entity_t id; /* Component id */
uint64_t table_id; /* Table id for detecting ABA issues */
struct ecs_table_record_t *tr; /* Table record for component */
ecs_record_t *record; /* Entity index record */
};
/* Cursor to stack allocator. Type is public to allow for white box testing. */
struct ecs_stack_page_t;
typedef struct ecs_stack_cursor_t {
struct ecs_stack_cursor_t *prev;
struct ecs_stack_page_t *page;
int16_t sp;
bool is_free;
#ifdef FLECS_DEBUG
struct ecs_stack_t *owner;
#endif
} ecs_stack_cursor_t;
/* Page-iterator specific data */
typedef struct ecs_page_iter_t {
int32_t offset;
int32_t limit;
int32_t remaining;
} ecs_page_iter_t;
/* Worker-iterator specific data */
typedef struct ecs_worker_iter_t {
int32_t index;
int32_t count;
} ecs_worker_iter_t;
/* Convenience struct to iterate table array for id */
typedef struct ecs_table_cache_iter_t {
struct ecs_table_cache_hdr_t *cur, *next;
struct ecs_table_cache_hdr_t *next_list;
} ecs_table_cache_iter_t;
/** Term-iterator specific data */
typedef struct ecs_term_iter_t {
ecs_term_t term;
ecs_id_record_t *self_index;
ecs_id_record_t *set_index;
ecs_id_record_t *cur;
ecs_table_cache_iter_t it;
int32_t index;
int32_t observed_table_count;
ecs_table_t *table;
int32_t cur_match;
int32_t match_count;
int32_t last_column;
bool empty_tables;
/* Storage */
ecs_id_t id;
int32_t column;
ecs_entity_t subject;
ecs_size_t size;
void *ptr;
} ecs_term_iter_t;
typedef enum ecs_iter_kind_t {
EcsIterEvalCondition,
EcsIterEvalTables,
EcsIterEvalChain,
EcsIterEvalNone
} ecs_iter_kind_t;
/** Filter-iterator specific data */
typedef struct ecs_filter_iter_t {
const ecs_filter_t *filter;
ecs_iter_kind_t kind;
ecs_term_iter_t term_iter;
int32_t matches_left;
int32_t pivot_term;
} ecs_filter_iter_t;
/** Query-iterator specific data */
typedef struct ecs_query_iter_t {
ecs_query_t *query;
ecs_query_table_match_t *node, *prev, *last;
int32_t sparse_smallest;
int32_t sparse_first;
int32_t bitset_first;
int32_t skip_count;
} ecs_query_iter_t;
/** Snapshot-iterator specific data */
typedef struct ecs_snapshot_iter_t {
ecs_filter_t filter;
ecs_vec_t tables; /* ecs_table_leaf_t */
int32_t index;
} ecs_snapshot_iter_t;
typedef struct ecs_rule_op_profile_t {
int32_t count[2]; /* 0 = enter, 1 = redo */
} ecs_rule_op_profile_t;
/** Rule-iterator specific data */
typedef struct ecs_rule_iter_t {
const ecs_rule_t *rule;
struct ecs_var_t *vars; /* Variable storage */
const struct ecs_rule_var_t *rule_vars;
const struct ecs_rule_op_t *ops;
struct ecs_rule_op_ctx_t *op_ctx; /* Operation-specific state */
uint64_t *written;
ecs_flags32_t source_set;
#ifdef FLECS_DEBUG
ecs_rule_op_profile_t *profile;
#endif
int16_t op;
int16_t sp;
} ecs_rule_iter_t;
/* Bits for tracking whether a cache was used/whether the array was allocated.
* Used by flecs_iter_init, flecs_iter_validate and ecs_iter_fini.
* Constants are named to enable easy macro substitution. */
#define flecs_iter_cache_ids (1u << 0u)
#define flecs_iter_cache_columns (1u << 1u)
#define flecs_iter_cache_sources (1u << 2u)
#define flecs_iter_cache_ptrs (1u << 3u)
#define flecs_iter_cache_match_indices (1u << 4u)
#define flecs_iter_cache_variables (1u << 5u)
#define flecs_iter_cache_all (255)
/* Inline iterator arrays to prevent allocations for small array sizes */
typedef struct ecs_iter_cache_t {
ecs_stack_cursor_t *stack_cursor; /* Stack cursor to restore to */
ecs_flags8_t used; /* For which fields is the cache used */
ecs_flags8_t allocated; /* Which fields are allocated */
} ecs_iter_cache_t;
/* Private iterator data. Used by iterator implementations to keep track of
* progress & to provide builtin storage. */
typedef struct ecs_iter_private_t {
union {
ecs_term_iter_t term;
ecs_filter_iter_t filter;
ecs_query_iter_t query;
ecs_rule_iter_t rule;
ecs_snapshot_iter_t snapshot;
ecs_page_iter_t page;
ecs_worker_iter_t worker;
} iter; /* Iterator specific data */
void *entity_iter; /* Filter applied after matching a table */
ecs_iter_cache_t cache; /* Inline arrays to reduce allocations */
} ecs_iter_private_t;
/** Iterator */
struct ecs_iter_t {
/* World */
ecs_world_t *world; /* The world */
ecs_world_t *real_world; /* Actual world. This differs from world when in readonly mode */
/* Matched data */
ecs_entity_t *entities; /* Entity identifiers */
void **ptrs; /* Pointers to components. Array if from this, pointer if not. */
ecs_size_t *sizes; /* Component sizes */
ecs_table_t *table; /* Current table */
ecs_table_t *other_table; /* Prev or next table when adding/removing */
ecs_id_t *ids; /* (Component) ids */
ecs_var_t *variables; /* Values of variables (if any) */
int32_t *columns; /* Query term to table column mapping */
ecs_entity_t *sources; /* Entity on which the id was matched (0 if same as entities) */
int32_t *match_indices; /* Indices of current match for term. Allows an iterator to iterate
* all permutations of wildcards in query. */
ecs_ref_t *references; /* Cached refs to components (if iterating a cache) */
ecs_flags64_t constrained_vars; /* Bitset that marks constrained variables */
uint64_t group_id; /* Group id for table, if group_by is used */
int32_t field_count; /* Number of fields in iterator */
/* Input information */
ecs_entity_t system; /* The system (if applicable) */
ecs_entity_t event; /* The event (if applicable) */
ecs_id_t event_id; /* The (component) id for the event */
int32_t event_cur; /* Unique event id. Used to dedup observer calls */
/* Query information */
const ecs_filter_t *query; /* Query being evaluated */
ecs_term_t *terms; /* Term array of query being evaluated */
int32_t table_count; /* Active table count for query */
int32_t term_index; /* Index of term that emitted an event.
* This field will be set to the 'index' field
* of an observer term. */
int32_t variable_count; /* Number of variables for query */
char **variable_names; /* Names of variables (if any) */
/* Context */
void *param; /* Param passed to ecs_run */
void *ctx; /* System context */
void *binding_ctx; /* Binding context */
/* Time */
ecs_ftime_t delta_time; /* Time elapsed since last frame */
ecs_ftime_t delta_system_time;/* Time elapsed since last system invocation */
/* Iterator counters */
int32_t frame_offset; /* Offset relative to start of iteration */
int32_t offset; /* Offset relative to current table */
int32_t count; /* Number of entities to iterate */
int32_t instance_count; /* Number of entities to iterate before next table */
/* Iterator flags */
ecs_flags32_t flags;
ecs_entity_t interrupted_by; /* When set, system execution is interrupted */
ecs_iter_private_t priv; /* Private data */
/* Chained iterators */
ecs_iter_next_action_t next; /* Function to progress iterator */
ecs_iter_action_t callback; /* Callback of system or observer */
ecs_iter_action_t set_var; /* Invoked after setting variable (optionally set) */
ecs_iter_fini_action_t fini; /* Function to cleanup iterator resources */
ecs_iter_t *chain_it; /* Optional, allows for creating iterator chains */
};
#ifdef __cplusplus
}
#endif
#endif
/**
* @file api_support.h
* @brief Support functions and constants.
*
* Supporting types and functions that need to be exposed either in support of
* the public API or for unit tests, but that may change between minor / patch
* releases.
*/
#ifndef FLECS_API_SUPPORT_H
#define FLECS_API_SUPPORT_H
#ifdef __cplusplus
extern "C" {
#endif
/** This is the largest possible component id. Components for the most part
* occupy the same id range as entities, however they are not allowed to overlap
* with (8) bits reserved for id flags. */
#define ECS_MAX_COMPONENT_ID (~((uint32_t)(ECS_ID_FLAGS_MASK >> 32)))
/** The maximum number of nested function calls before the core will throw a
* cycle detected error */
#define ECS_MAX_RECURSION (512)
/** Maximum length of a parser token (used by parser-related addons) */
#define ECS_MAX_TOKEN_SIZE (256)
////////////////////////////////////////////////////////////////////////////////
//// Global type handles
////////////////////////////////////////////////////////////////////////////////
/** This allows passing 0 as type to functions that accept ids */
#define FLECS_ID0ID_ 0
FLECS_API
char* ecs_module_path_from_c(
const char *c_name);
bool ecs_identifier_is_0(
const char *id);
/* Constructor that zeromem's a component value */
FLECS_API
void ecs_default_ctor(
void *ptr,
int32_t count,
const ecs_type_info_t *ctx);
/* Create allocated string from format */
FLECS_DBG_API
char* ecs_vasprintf(
const char *fmt,
va_list args);
/* Create allocated string from format */
FLECS_API
char* ecs_asprintf(
const char *fmt,
...);
/* Convert identifier to snake case */
FLECS_API
char* flecs_to_snake_case(
const char *str);
FLECS_DBG_API
int32_t flecs_table_observed_count(
const ecs_table_t *table);
FLECS_DBG_API
void flecs_dump_backtrace(
void *stream);
/** Calculate offset from address */
#ifdef __cplusplus
#define ECS_OFFSET(o, offset) reinterpret_cast<void*>((reinterpret_cast<uintptr_t>(o)) + (static_cast<uintptr_t>(offset)))
#else
#define ECS_OFFSET(o, offset) (void*)(((uintptr_t)(o)) + ((uintptr_t)(offset)))
#endif
#define ECS_OFFSET_T(o, T) ECS_OFFSET(o, ECS_SIZEOF(T))
#define ECS_ELEM(ptr, size, index) ECS_OFFSET(ptr, (size) * (index))
#define ECS_ELEM_T(o, T, index) ECS_ELEM(o, ECS_SIZEOF(T), index)
/** Enable/disable bitsets */
#define ECS_BIT_SET(flags, bit) (flags) |= (bit)
#define ECS_BIT_CLEAR(flags, bit) (flags) &= ~(bit)
#define ECS_BIT_COND(flags, bit, cond) ((cond) \
? (ECS_BIT_SET(flags, bit)) \
: (ECS_BIT_CLEAR(flags, bit)))
#define ECS_BIT_IS_SET(flags, bit) ((flags) & (bit))
#ifdef __cplusplus
}
#endif
#endif
/**
* @file hashmap.h
* @brief Hashmap data structure.
*/
#ifndef FLECS_HASHMAP_H
#define FLECS_HASHMAP_H
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
ecs_vec_t keys;
ecs_vec_t values;
} ecs_hm_bucket_t;
typedef struct {
ecs_hash_value_action_t hash;
ecs_compare_action_t compare;
ecs_size_t key_size;
ecs_size_t value_size;
ecs_block_allocator_t *hashmap_allocator;
ecs_block_allocator_t bucket_allocator;
ecs_map_t impl;
} ecs_hashmap_t;
typedef struct {
ecs_map_iter_t it;
ecs_hm_bucket_t *bucket;
int32_t index;
} flecs_hashmap_iter_t;
typedef struct {
void *key;
void *value;
uint64_t hash;
} flecs_hashmap_result_t;
FLECS_DBG_API
void flecs_hashmap_init_(
ecs_hashmap_t *hm,
ecs_size_t key_size,
ecs_size_t value_size,
ecs_hash_value_action_t hash,
ecs_compare_action_t compare,
ecs_allocator_t *allocator);
#define flecs_hashmap_init(hm, K, V, hash, compare, allocator)\
flecs_hashmap_init_(hm, ECS_SIZEOF(K), ECS_SIZEOF(V), hash, compare, allocator)
FLECS_DBG_API
void flecs_hashmap_fini(
ecs_hashmap_t *map);
FLECS_DBG_API
void* flecs_hashmap_get_(
const ecs_hashmap_t *map,
ecs_size_t key_size,
const void *key,
ecs_size_t value_size);
#define flecs_hashmap_get(map, key, V)\
(V*)flecs_hashmap_get_(map, ECS_SIZEOF(*key), key, ECS_SIZEOF(V))
FLECS_DBG_API
flecs_hashmap_result_t flecs_hashmap_ensure_(
ecs_hashmap_t *map,
ecs_size_t key_size,
const void *key,
ecs_size_t value_size);
#define flecs_hashmap_ensure(map, key, V)\
flecs_hashmap_ensure_(map, ECS_SIZEOF(*key), key, ECS_SIZEOF(V))
FLECS_DBG_API
void flecs_hashmap_set_(
ecs_hashmap_t *map,
ecs_size_t key_size,
void *key,
ecs_size_t value_size,
const void *value);
#define flecs_hashmap_set(map, key, value)\
flecs_hashmap_set_(map, ECS_SIZEOF(*key), key, ECS_SIZEOF(*value), value)
FLECS_DBG_API
void flecs_hashmap_remove_(
ecs_hashmap_t *map,
ecs_size_t key_size,
const void *key,
ecs_size_t value_size);
#define flecs_hashmap_remove(map, key, V)\
flecs_hashmap_remove_(map, ECS_SIZEOF(*key), key, ECS_SIZEOF(V))
FLECS_DBG_API
void flecs_hashmap_remove_w_hash_(
ecs_hashmap_t *map,
ecs_size_t key_size,
const void *key,
ecs_size_t value_size,
uint64_t hash);
#define flecs_hashmap_remove_w_hash(map, key, V, hash)\
flecs_hashmap_remove_w_hash_(map, ECS_SIZEOF(*key), key, ECS_SIZEOF(V), hash)
FLECS_DBG_API
ecs_hm_bucket_t* flecs_hashmap_get_bucket(
const ecs_hashmap_t *map,
uint64_t hash);
FLECS_DBG_API
void flecs_hm_bucket_remove(
ecs_hashmap_t *map,
ecs_hm_bucket_t *bucket,
uint64_t hash,
int32_t index);
FLECS_DBG_API
void flecs_hashmap_copy(
ecs_hashmap_t *dst,
const ecs_hashmap_t *src);
FLECS_DBG_API
flecs_hashmap_iter_t flecs_hashmap_iter(
ecs_hashmap_t *map);
FLECS_DBG_API
void* flecs_hashmap_next_(
flecs_hashmap_iter_t *it,
ecs_size_t key_size,
void *key_out,
ecs_size_t value_size);
#define flecs_hashmap_next(map, V)\
(V*)flecs_hashmap_next_(map, 0, NULL, ECS_SIZEOF(V))
#define flecs_hashmap_next_w_key(map, K, key, V)\
(V*)flecs_hashmap_next_(map, ECS_SIZEOF(K), key, ECS_SIZEOF(V))
#ifdef __cplusplus
}
#endif
#endif
/** Used with ecs_entity_init().
*
* @ingroup entities
*/
typedef struct ecs_entity_desc_t {
int32_t _canary;
ecs_entity_t id; /**< Set to modify existing entity (optional) */
const char *name; /**< Name of the entity. If no entity is provided, an
* entity with this name will be looked up first. When
* an entity is provided, the name will be verified
* with the existing entity. */
const char *sep; /**< Optional custom separator for hierarchical names.
* Leave to NULL for default ('.') separator. Set to
* an empty string to prevent tokenization of name. */
const char *root_sep; /**< Optional, used for identifiers relative to root */
const char *symbol; /**< Optional entity symbol. A symbol is an unscoped
* identifier that can be used to lookup an entity. The
* primary use case for this is to associate the entity
* with a language identifier, such as a type or
* function name, where these identifiers differ from
* the name they are registered with in flecs. For
* example, C type "EcsPosition" might be registered
* as "flecs.components.transform.Position", with the
* symbol set to "EcsPosition". */
bool use_low_id; /**< When set to true, a low id (typically reserved for
* components) will be used to create the entity, if
* no id is specified. */
/** Array of ids to add to the new or existing entity. */
ecs_id_t add[FLECS_ID_DESC_MAX];
/** String expression with components to add */
const char *add_expr;
} ecs_entity_desc_t;
/** Used with ecs_bulk_init().
*
* @ingroup entities
*/
typedef struct ecs_bulk_desc_t {
int32_t _canary;
ecs_entity_t *entities; /**< Entities to bulk insert. Entity ids provided by
* the application must be empty (cannot
* have components). If no entity ids are provided, the
* operation will create 'count' new entities. */
int32_t count; /**< Number of entities to create/populate */
ecs_id_t ids[FLECS_ID_DESC_MAX]; /**< Ids to create the entities with */
void **data; /**< Array with component data to insert. Each element in
* the array must correspond with an element in the ids
* array. If an element in the ids array is a tag, the
* data array must contain a NULL. An element may be
* set to NULL for a component, in which case the
* component will not be set by the operation. */
ecs_table_t *table; /**< Table to insert the entities into. Should not be set
* at the same time as ids. When 'table' is set at the
* same time as 'data', the elements in the data array
* must correspond with the ids in the table's type. */
} ecs_bulk_desc_t;
/** Used with ecs_component_init().
*
* @ingroup components
*/
typedef struct ecs_component_desc_t {
int32_t _canary;
/** Existing entity to associate with observer (optional) */
ecs_entity_t entity;
/** Parameters for type (size, hooks, ...) */
ecs_type_info_t type;
} ecs_component_desc_t;
/** Used with ecs_filter_init().
*
* @ingroup filters
*/
typedef struct ecs_filter_desc_t {
int32_t _canary;
/** Terms of the filter. If a filter has more terms than
* FLECS_TERM_DESC_MAX use terms_buffer */
ecs_term_t terms[FLECS_TERM_DESC_MAX];
/** For filters with lots of terms an outside array can be provided. */
ecs_term_t *terms_buffer;
/** Number of terms in array provided in terms_buffer. */
int32_t terms_buffer_count;
/** External storage to prevent allocation of the filter object */
ecs_filter_t *storage;
/** When true, terms returned by an iterator may either contain 1 or N
* elements, where terms with N elements are owned, and terms with 1 element
* are shared, for example from a parent or base entity. When false, the
* iterator will at most return 1 element when the result contains both
* owned and shared terms. */
bool instanced;
/** Flags for advanced usage */
ecs_flags32_t flags;
/** Filter expression. Should not be set at the same time as terms array */
const char *expr;
/** Entity associated with query (optional) */
ecs_entity_t entity;
} ecs_filter_desc_t;
/** Used with ecs_query_init().
*
* @ingroup queries
*/
typedef struct ecs_query_desc_t {
int32_t _canary;
/** Filter for the query */
ecs_filter_desc_t filter;
/** Component to be used by order_by */
ecs_entity_t order_by_component;
/** Callback used for ordering query results. If order_by_id is 0, the
* pointer provided to the callback will be NULL. If the callback is not
* set, results will not be ordered. */
ecs_order_by_action_t order_by;
/** Callback used for ordering query results. Same as order_by,
* but more efficient. */
ecs_sort_table_action_t sort_table;
/** Id to be used by group_by. This id is passed to the group_by function and
* can be used identify the part of an entity type that should be used for
* grouping. */
ecs_id_t group_by_id;
/** Callback used for grouping results. If the callback is not set, results
* will not be grouped. When set, this callback will be used to calculate a
* "rank" for each entity (table) based on its components. This rank is then
* used to sort entities (tables), so that entities (tables) of the same
* rank are "grouped" together when iterated. */
ecs_group_by_action_t group_by;
/** Callback that is invoked when a new group is created. The return value of
* the callback is stored as context for a group. */
ecs_group_create_action_t on_group_create;
/** Callback that is invoked when an existing group is deleted. The return
* value of the on_group_create callback is passed as context parameter. */
ecs_group_delete_action_t on_group_delete;
/** Context to pass to group_by */
void *group_by_ctx;
/** Function to free group_by_ctx */
ecs_ctx_free_t group_by_ctx_free;
/** If set, the query will be created as a subquery. A subquery matches at
* most a subset of its parent query. Subqueries do not directly receive
* (table) notifications from the world. Instead parent queries forward
* results to subqueries. This can improve matching performance, as fewer
* queries need to be matched with new tables.
* Subqueries can be nested. */
ecs_query_t *parent;
/** User context to pass to callback */
void *ctx;
/** Context to be used for language bindings */
void *binding_ctx;
/** Callback to free ctx */
ecs_ctx_free_t ctx_free;
/** Callback to free binding_ctx */
ecs_ctx_free_t binding_ctx_free;
} ecs_query_desc_t;
/** Used with ecs_observer_init().
*
* @ingroup observers
*/
typedef struct ecs_observer_desc_t {
int32_t _canary;
/** Existing entity to associate with observer (optional) */
ecs_entity_t entity;
/** Filter for observer */
ecs_filter_desc_t filter;
/** Events to observe (OnAdd, OnRemove, OnSet, UnSet) */
ecs_entity_t events[FLECS_EVENT_DESC_MAX];
/** When observer is created, generate events from existing data. For example,
* EcsOnAdd Position would match all existing instances of Position.
* This is only supported for events that are iterable (see EcsIterable) */
bool yield_existing;
/** Callback to invoke on an event, invoked when the observer matches. */
ecs_iter_action_t callback;
/** Callback invoked on an event. When left to NULL the default runner
* is used which matches the event with the observer's filter, and calls
* 'callback' when it matches.
* A reason to override the run function is to improve performance, if there
* are more efficient way to test whether an event matches the observer than
* the general purpose query matcher. */
ecs_run_action_t run;
/** User context to pass to callback */
void *ctx;
/** Context to be used for language bindings */
void *binding_ctx;
/** Callback to free ctx */
ecs_ctx_free_t ctx_free;
/** Callback to free binding_ctx */
ecs_ctx_free_t binding_ctx_free;
/** Observable with which to register the observer */
ecs_poly_t *observable;
/** Optional shared last event id for multiple observers. Ensures only one
* of the observers with the shared id gets triggered for an event */
int32_t *last_event_id;
/** Used for internal purposes */
int32_t term_index;
} ecs_observer_desc_t;
/** Used with ecs_emit().
*
* @ingroup observers
*/
typedef struct ecs_event_desc_t {
/** The event id. Only observers for the specified event will be notified */
ecs_entity_t event;
/** Component ids. Only observers with a matching component id will be
* notified. Observers are guaranteed to get notified once, even if they
* match more than one id. */
const ecs_type_t *ids;
/** The table for which to notify. */
ecs_table_t *table;
/** Optional 2nd table to notify. This can be used to communicate the
* previous or next table, in case an entity is moved between tables. */
ecs_table_t *other_table;
/** Limit notified entities to ones starting from offset (row) in table */
int32_t offset;
/** Limit number of notified entities to count. offset+count must be less
* than the total number of entities in the table. If left to 0, it will be
* automatically determined by doing ecs_table_count(table) - offset. */
int32_t count;
/** Single-entity alternative to setting table / offset / count */
ecs_entity_t entity;
/** Optional context.
* The type of the param must be the event, where the event is a component.
* When an event is enqueued, the value of param is coped to a temporary
* storage of the event type. */
void *param;
/* Same as param, but with the guarantee that the value won't be modified.
* When an event with a const parameter is enqueued, the value of the param
* is copied to a temporary storage of the event type. */
const void *const_param;
/** Observable (usually the world) */
ecs_poly_t *observable;
/** Event flags */
ecs_flags32_t flags;
} ecs_event_desc_t;
/**
* @defgroup misc_types Miscellaneous types
* Types used to create entities, observers, queries and more.
*
* @{
*/
/* Utility to hold a value of a dynamic type */
typedef struct ecs_value_t {
ecs_entity_t type;
void *ptr;
} ecs_value_t;
/** Type that contains information about the world. */
typedef struct ecs_world_info_t {
ecs_entity_t last_component_id; /**< Last issued component entity id */
ecs_entity_t min_id; /**< First allowed entity id */
ecs_entity_t max_id; /**< Last allowed entity id */
ecs_ftime_t delta_time_raw; /**< Raw delta time (no time scaling) */
ecs_ftime_t delta_time; /**< Time passed to or computed by ecs_progress */
ecs_ftime_t time_scale; /**< Time scale applied to delta_time */
ecs_ftime_t target_fps; /**< Target fps */
ecs_ftime_t frame_time_total; /**< Total time spent processing a frame */
ecs_ftime_t system_time_total; /**< Total time spent in systems */
ecs_ftime_t emit_time_total; /**< Total time spent notifying observers */
ecs_ftime_t merge_time_total; /**< Total time spent in merges */
ecs_ftime_t world_time_total; /**< Time elapsed in simulation */
ecs_ftime_t world_time_total_raw; /**< Time elapsed in simulation (no scaling) */
ecs_ftime_t rematch_time_total; /**< Time spent on query rematching */
int64_t frame_count_total; /**< Total number of frames */
int64_t merge_count_total; /**< Total number of merges */
int64_t rematch_count_total; /**< Total number of rematches */
int64_t id_create_total; /**< Total number of times a new id was created */
int64_t id_delete_total; /**< Total number of times an id was deleted */
int64_t table_create_total; /**< Total number of times a table was created */
int64_t table_delete_total; /**< Total number of times a table was deleted */
int64_t pipeline_build_count_total; /**< Total number of pipeline builds */
int64_t systems_ran_frame; /**< Total number of systems ran in last frame */
int64_t observers_ran_frame; /**< Total number of times observer was invoked */
int32_t tag_id_count; /**< Number of tag (no data) ids in the world */
int32_t component_id_count; /**< Number of component (data) ids in the world */
int32_t pair_id_count; /**< Number of pair ids in the world */
int32_t table_count; /**< Number of tables */
int32_t empty_table_count; /**< Number of tables without entities */
/* -- Command counts -- */
struct {
int64_t add_count; /**< add commands processed */
int64_t remove_count; /**< remove commands processed */
int64_t delete_count; /**< delete commands processed */
int64_t clear_count; /**< clear commands processed */
int64_t set_count; /**< set commands processed */
int64_t get_mut_count; /**< get_mut/emplace commands processed */
int64_t modified_count; /**< modified commands processed */
int64_t other_count; /**< other commands processed */
int64_t discard_count; /**< commands discarded, happens when entity is no longer alive when running the command */
int64_t batched_entity_count; /**< entities for which commands were batched */
int64_t batched_command_count; /**< commands batched */
} cmd;
const char *name_prefix; /**< Value set by ecs_set_name_prefix(). Used
* to remove library prefixes of symbol
* names (such as `Ecs`, `ecs_`) when
* registering them as names. */
} ecs_world_info_t;
/** Type that contains information about a query group. */
typedef struct ecs_query_group_info_t {
int32_t match_count; /**< How often tables have been matched/unmatched */
int32_t table_count; /**< Number of tables in group */
void *ctx; /**< Group context, returned by on_group_create */
} ecs_query_group_info_t;
/** @} */
/**
* @defgroup builtin_components Builtin component types.
* Types that represent builtin components.
*
* @{
*/
/** A (string) identifier. Used as pair with EcsName and EcsSymbol tags */
typedef struct EcsIdentifier {
char *value; /**< Identifier string */
ecs_size_t length; /**< Length of identifier */
uint64_t hash; /**< Hash of current value */
uint64_t index_hash; /**< Hash of existing record in current index */
ecs_hashmap_t *index; /**< Current index */
} EcsIdentifier;
/** Component information. */
typedef struct EcsComponent {
ecs_size_t size; /**< Component size */
ecs_size_t alignment; /**< Component alignment */
} EcsComponent;
/** Component for storing a poly object */
typedef struct EcsPoly {
ecs_poly_t *poly; /**< Pointer to poly object */
} EcsPoly;
/** Target data for flattened relationships. */
typedef struct EcsTarget {
int32_t count;
ecs_record_t *target;
} EcsTarget;
/** Component for iterable entities */
typedef ecs_iterable_t EcsIterable;
/** @} */
/** @} */
/* Only include deprecated definitions if deprecated addon is required */
#ifdef FLECS_DEPRECATED
/**
* @file addons/deprecated.h
* @brief The deprecated addon contains deprecated operations.
*/
#ifdef FLECS_DEPRECATED
#ifndef FLECS_DEPRECATED_H
#define FLECS_DEPRECATED_H
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
}
#endif
#endif
#endif
#endif
/**
* @defgroup api_constants API Constants
* Public API constants.
*
* @{
*/
/**
* @defgroup id_flags Component id flags.
* Id flags are bits that can be set on an id (ecs_id_t).
*
* @{
*/
/** Indicates that the id is a pair. */
FLECS_API extern const ecs_id_t ECS_PAIR;
/** Automatically override component when it is inherited */
FLECS_API extern const ecs_id_t ECS_OVERRIDE;
/** Adds bitset to storage which allows component to be enabled/disabled */
FLECS_API extern const ecs_id_t ECS_TOGGLE;
/** Include all components from entity to which AND is applied */
FLECS_API extern const ecs_id_t ECS_AND;
/** @} */
/**
* @defgroup builtin_tags Builtin component ids.
* @{
*/
/* Builtin component ids */
FLECS_API extern const ecs_entity_t ecs_id(EcsComponent);
FLECS_API extern const ecs_entity_t ecs_id(EcsIdentifier);
FLECS_API extern const ecs_entity_t ecs_id(EcsIterable);
FLECS_API extern const ecs_entity_t ecs_id(EcsPoly);
FLECS_API extern const ecs_entity_t EcsQuery;
FLECS_API extern const ecs_entity_t EcsObserver;
/* System module component ids */
FLECS_API extern const ecs_entity_t EcsSystem;
FLECS_API extern const ecs_entity_t ecs_id(EcsTickSource);
/* Pipeline module component ids */
FLECS_API extern const ecs_entity_t ecs_id(EcsPipelineQuery);
/* Timer module component ids */
FLECS_API extern const ecs_entity_t ecs_id(EcsTimer);
FLECS_API extern const ecs_entity_t ecs_id(EcsRateFilter);
/** Root scope for builtin flecs entities */
FLECS_API extern const ecs_entity_t EcsFlecs;
/** Core module scope */
FLECS_API extern const ecs_entity_t EcsFlecsCore;
/** Entity associated with world (used for "attaching" components to world) */
FLECS_API extern const ecs_entity_t EcsWorld;
/** Wildcard entity ("*"). Matches any id, returns all matches. */
FLECS_API extern const ecs_entity_t EcsWildcard;
/** Any entity ("_"). Matches any id, returns only the first. */
FLECS_API extern const ecs_entity_t EcsAny;
/** This entity. Default source for queries. */
FLECS_API extern const ecs_entity_t EcsThis;
/** Variable entity ("$"). Used in expressions to prefix variable names */
FLECS_API extern const ecs_entity_t EcsVariable;
/** Marks a relationship as transitive.
* Behavior:
* if R(X, Y) and R(Y, Z) then R(X, Z)
*/
FLECS_API extern const ecs_entity_t EcsTransitive;
/** Marks a relationship as reflexive.
* Behavior:
* R(X, X) == true
*/
FLECS_API extern const ecs_entity_t EcsReflexive;
/** Ensures that entity/component cannot be used as target in IsA relationship.
* Final can improve the performance of rule-based queries, as they will not
* attempt to substitute a final component with its subsets.
*
* Behavior:
* if IsA(X, Y) and Final(Y) throw error
*/
FLECS_API extern const ecs_entity_t EcsFinal;
/** Ensures that component is never inherited from an IsA target.
*
* Behavior:
* if DontInherit(X) and X(B) and IsA(A, B) then X(A) is false.
*/
FLECS_API extern const ecs_entity_t EcsDontInherit;
/** Ensures a component is always overridden.
*
* Behavior:
* As if the component is added together with OVERRIDE | T
*/
FLECS_API extern const ecs_entity_t EcsAlwaysOverride;
/** Marks relationship as commutative.
* Behavior:
* if R(X, Y) then R(Y, X)
*/
FLECS_API extern const ecs_entity_t EcsSymmetric;
/** Can be added to relationship to indicate that the relationship can only occur
* once on an entity. Adding a 2nd instance will replace the 1st.
*
* Behavior:
* R(X, Y) + R(X, Z) = R(X, Z)
*/
FLECS_API extern const ecs_entity_t EcsExclusive;
/** Marks a relationship as acyclic. Acyclic relationships may not form cycles. */
FLECS_API extern const ecs_entity_t EcsAcyclic;
/** Marks a relationship as traversable. Traversable relationships may be
* traversed with "up" queries. Traversable relationships are acyclic. */
FLECS_API extern const ecs_entity_t EcsTraversable;
/** Ensure that a component always is added together with another component.
*
* Behavior:
* If With(R, O) and R(X) then O(X)
* If With(R, O) and R(X, Y) then O(X, Y)
*/
FLECS_API extern const ecs_entity_t EcsWith;
/** Ensure that relationship target is child of specified entity.
*
* Behavior:
* If OneOf(R, O) and R(X, Y), Y must be a child of O
* If OneOf(R) and R(X, Y), Y must be a child of R
*/
FLECS_API extern const ecs_entity_t EcsOneOf;
/** Can be added to relationship to indicate that it should never hold data,
* even when it or the relationship target is a component. */
FLECS_API extern const ecs_entity_t EcsTag;
/** Tag to indicate that relationship is stored as union. Union relationships
* enable changing the target of a union without switching tables. Union
* relationships are also marked as exclusive. */
FLECS_API extern const ecs_entity_t EcsUnion;
/** Tag to indicate name identifier */
FLECS_API extern const ecs_entity_t EcsName;
/** Tag to indicate symbol identifier */
FLECS_API extern const ecs_entity_t EcsSymbol;
/** Tag to indicate alias identifier */
FLECS_API extern const ecs_entity_t EcsAlias;
/** Used to express parent-child relationships. */
FLECS_API extern const ecs_entity_t EcsChildOf;
/** Used to express inheritance relationships. */
FLECS_API extern const ecs_entity_t EcsIsA;
/** Used to express dependency relationships */
FLECS_API extern const ecs_entity_t EcsDependsOn;
/** Used to express a slot (used with prefab inheritance) */
FLECS_API extern const ecs_entity_t EcsSlotOf;
/** Tag added to module entities */
FLECS_API extern const ecs_entity_t EcsModule;
/** Tag to indicate an entity/component/system is private to a module */
FLECS_API extern const ecs_entity_t EcsPrivate;
/** Tag added to prefab entities. Any entity with this tag is automatically
* ignored by queries, unless EcsPrefab is explicitly queried for. */
FLECS_API extern const ecs_entity_t EcsPrefab;
/** When this tag is added to an entity it is skipped by queries, unless
* EcsDisabled is explicitly queried for. */
FLECS_API extern const ecs_entity_t EcsDisabled;
/** Event that triggers when an id is added to an entity */
FLECS_API extern const ecs_entity_t EcsOnAdd;
/** Event that triggers when an id is removed from an entity */
FLECS_API extern const ecs_entity_t EcsOnRemove;
/** Event that triggers when a component is set for an entity */
FLECS_API extern const ecs_entity_t EcsOnSet;
/** Event that triggers when a component is unset for an entity */
FLECS_API extern const ecs_entity_t EcsUnSet;
/** Event that triggers observer when an entity starts/stops matching a query */
FLECS_API extern const ecs_entity_t EcsMonitor;
/** Event that triggers when a table is created. */
FLECS_API extern const ecs_entity_t EcsOnTableCreate;
/** Event that triggers when a table is deleted. */
FLECS_API extern const ecs_entity_t EcsOnTableDelete;
/** Event that triggers when a table becomes empty (doesn't emit on creation). */
FLECS_API extern const ecs_entity_t EcsOnTableEmpty;
/** Event that triggers when a table becomes non-empty. */
FLECS_API extern const ecs_entity_t EcsOnTableFill;
/** Relationship used for specifying cleanup behavior. */
FLECS_API extern const ecs_entity_t EcsOnDelete;
/** Relationship used to define what should happen when a target entity (second
* element of a pair) is deleted. */
FLECS_API extern const ecs_entity_t EcsOnDeleteTarget;
/** Remove cleanup policy. Must be used as target in pair with EcsOnDelete or
* EcsOnDeleteTarget. */
FLECS_API extern const ecs_entity_t EcsRemove;
/** Delete cleanup policy. Must be used as target in pair with EcsOnDelete or
* EcsOnDeleteTarget. */
FLECS_API extern const ecs_entity_t EcsDelete;
/** Panic cleanup policy. Must be used as target in pair with EcsOnDelete or
* EcsOnDeleteTarget. */
FLECS_API extern const ecs_entity_t EcsPanic;
/** Component that stores data for flattened relationships */
FLECS_API extern const ecs_entity_t ecs_id(EcsTarget);
/** Tag added to root entity to indicate its subtree should be flattened. Used
* together with assemblies. */
FLECS_API extern const ecs_entity_t EcsFlatten;
/** Used like (EcsDefaultChildComponent, Component). When added to an entity,
* this informs serialization formats which component to use when a value is
* assigned to an entity without specifying the component. This is intended as
* a hint, serialization formats are not required to use it. Adding this
* component does not change the behavior of core ECS operations. */
FLECS_API extern const ecs_entity_t EcsDefaultChildComponent;
/* Builtin predicates for comparing entity ids in queries. Only supported by rules */
FLECS_API extern const ecs_entity_t EcsPredEq;
FLECS_API extern const ecs_entity_t EcsPredMatch;
FLECS_API extern const ecs_entity_t EcsPredLookup;
/* Builtin marker entities for opening/closing query scopes */
FLECS_API extern const ecs_entity_t EcsScopeOpen;
FLECS_API extern const ecs_entity_t EcsScopeClose;
/** Tag used to indicate query is empty */
FLECS_API extern const ecs_entity_t EcsEmpty;
/* Pipeline module tags */
FLECS_API extern const ecs_entity_t ecs_id(EcsPipeline);
FLECS_API extern const ecs_entity_t EcsOnStart;
FLECS_API extern const ecs_entity_t EcsPreFrame;
FLECS_API extern const ecs_entity_t EcsOnLoad;
FLECS_API extern const ecs_entity_t EcsPostLoad;
FLECS_API extern const ecs_entity_t EcsPreUpdate;
FLECS_API extern const ecs_entity_t EcsOnUpdate;
FLECS_API extern const ecs_entity_t EcsOnValidate;
FLECS_API extern const ecs_entity_t EcsPostUpdate;
FLECS_API extern const ecs_entity_t EcsPreStore;
FLECS_API extern const ecs_entity_t EcsOnStore;
FLECS_API extern const ecs_entity_t EcsPostFrame;
FLECS_API extern const ecs_entity_t EcsPhase;
/** Value used to quickly check if component is builtin. This is used to quickly
* filter out tables with builtin components (for example for ecs_delete()) */
#define EcsLastInternalComponentId (ecs_id(EcsPoly))
/** The first user-defined component starts from this id. Ids up to this number
* are reserved for builtin components */
#define EcsFirstUserComponentId (8)
/** The first user-defined entity starts from this id. Ids up to this number
* are reserved for builtin entities */
#define EcsFirstUserEntityId (FLECS_HI_COMPONENT_ID + 128)
/* When visualized the reserved id ranges look like this:
* [1..8]: Builtin components
* [9..FLECS_HI_COMPONENT_ID]: Low ids reserved for application components
* [FLECS_HI_COMPONENT_ID + 1..EcsFirstUserEntityId]: Builtin entities
*/
/** @} */
/** @} */
/**
* @defgroup world_api World
* Functions for working with `ecs_world_t`.
*
* @{
*/
/**
* @defgroup world_creation_deletion Creation & Deletion
* @{
*/
/** Create a new world.
* This operation automatically imports modules from addons Flecs has been built
* with, except when the module specifies otherwise.
*
* @return A new world
*/
FLECS_API
ecs_world_t* ecs_init(void);
/** Create a new world with just the core module.
* Same as ecs_init(), but doesn't import modules from addons. This operation is
* faster than ecs_init() and results in less memory utilization.
*
* @return A new tiny world
*/
FLECS_API
ecs_world_t* ecs_mini(void);
/** Create a new world with arguments.
* Same as ecs_init(), but allows passing in command line arguments. Command line
* arguments are used to:
* - automatically derive the name of the application from argv[0]
*
* @return A new world
*/
FLECS_API
ecs_world_t* ecs_init_w_args(
int argc,
char *argv[]);
/** Delete a world.
* This operation deletes the world, and everything it contains.
*
* @param world The world to delete.
* @return Zero if successful, non-zero if failed.
*/
FLECS_API
int ecs_fini(
ecs_world_t *world);
/** Returns whether the world is being deleted.
* This operation can be used in callbacks like type hooks or observers to
* detect if they are invoked while the world is being deleted.
*
* @param world The world.
* @return True if being deleted, false if not.
*/
FLECS_API
bool ecs_is_fini(
const ecs_world_t *world);
/** Register action to be executed when world is destroyed.
* Fini actions are typically used when a module needs to clean up before a
* world shuts down.
*
* @param world The world.
* @param action The function to execute.
* @param ctx Userdata to pass to the function */
FLECS_API
void ecs_atfini(
ecs_world_t *world,
ecs_fini_action_t action,
void *ctx);
/** @} */
/**
* @defgroup world_frame Frame functions
* @{
*/
/** Begin frame.
* When an application does not use ecs_progress() to control the main loop, it
* can still use Flecs features such as FPS limiting and time measurements. This
* operation needs to be invoked whenever a new frame is about to get processed.
*
* Calls to ecs_frame_begin() must always be followed by ecs_frame_end().
*
* The function accepts a delta_time parameter, which will get passed to
* systems. This value is also used to compute the amount of time the function
* needs to sleep to ensure it does not exceed the target_fps, when it is set.
* When 0 is provided for delta_time, the time will be measured.
*
* This function should only be ran from the main thread.
*
* @param world The world.
* @param delta_time Time elapsed since the last frame.
* @return The provided delta_time, or measured time if 0 was provided.
*/
FLECS_API
ecs_ftime_t ecs_frame_begin(
ecs_world_t *world,
ecs_ftime_t delta_time);
/** End frame.
* This operation must be called at the end of the frame, and always after
* ecs_frame_begin().
*
* @param world The world.
*/
FLECS_API
void ecs_frame_end(
ecs_world_t *world);
/** Register action to be executed once after frame.
* Post frame actions are typically used for calling operations that cannot be
* invoked during iteration, such as changing the number of threads.
*
* @param world The world.
* @param action The function to execute.
* @param ctx Userdata to pass to the function */
FLECS_API
void ecs_run_post_frame(
ecs_world_t *world,
ecs_fini_action_t action,
void *ctx);
/** Signal exit
* This operation signals that the application should quit. It will cause
* ecs_progress() to return false.
*
* @param world The world to quit.
*/
FLECS_API
void ecs_quit(
ecs_world_t *world);
/** Return whether a quit has been signaled.
*
* @param world The world.
*/
FLECS_API
bool ecs_should_quit(
const ecs_world_t *world);
/** Measure frame time.
* Frame time measurements measure the total time passed in a single frame, and
* how much of that time was spent on systems and on merging.
*
* Frame time measurements add a small constant-time overhead to an application.
* When an application sets a target FPS, frame time measurements are enabled by
* default.
*
* @param world The world.
* @param enable Whether to enable or disable frame time measuring.
*/
FLECS_API void ecs_measure_frame_time(
ecs_world_t *world,
bool enable);
/** Measure system time.
* System time measurements measure the time spent in each system.
*
* System time measurements add overhead to every system invocation and
* therefore have a small but measurable impact on application performance.
* System time measurements must be enabled before obtaining system statistics.
*
* @param world The world.
* @param enable Whether to enable or disable system time measuring.
*/
FLECS_API void ecs_measure_system_time(
ecs_world_t *world,
bool enable);
/** Set target frames per second (FPS) for application.
* Setting the target FPS ensures that ecs_progress() is not invoked faster than
* the specified FPS. When enabled, ecs_progress() tracks the time passed since
* the last invocation, and sleeps the remaining time of the frame (if any).
*
* This feature ensures systems are ran at a consistent interval, as well as
* conserving CPU time by not running systems more often than required.
*
* Note that ecs_progress() only sleeps if there is time left in the frame. Both
* time spent in flecs as time spent outside of flecs are taken into
* account.
*
* @param world The world.
* @param fps The target FPS.
*/
FLECS_API
void ecs_set_target_fps(
ecs_world_t *world,
ecs_ftime_t fps);
/** @} */
/**
* @defgroup commands Commands
* @{
*/
/** Begin readonly mode.
* Readonly mode guarantees that no mutations will occur on the world, which
* makes the world safe to access from multiple threads. While the world is in
* readonly mode, operations are deferred.
*
* Note that while similar to ecs_defer_begin(), deferring only does not guarantee
* the world is not mutated. Operations that are not deferred (like creating a
* query) update data structures on the world and are allowed when deferring is
* enabled, but not when the world is in readonly mode.
*
* A call to ecs_readonly_begin() must be followed up with ecs_readonly_end().
*
* The ecs_progress() function automatically enables readonly mode while systems
* are executed.
*
* When a world has more than one stage, the specific stage must be provided to
* mutating ECS operations. Failing to do so will throw a readonly assert. A
* world typically has more than one stage when using threads. An example:
*
* @code
* ecs_set_stage_count(world, 2);
* ecs_stage_t *stage = ecs_get_stage(world, 1);
*
* ecs_readonly_begin(world);
* ecs_add(world, e, Tag); // readonly assert
* ecs_add(stage, e, Tag); // OK
* @endcode
*
* @param world The world
* @return Whether world is in readonly mode.
*/
FLECS_API
bool ecs_readonly_begin(
ecs_world_t *world);
/** End readonly mode.
* This operation ends readonly mode, and must be called after
* ecs_readonly_begin(). Operations that were deferred while the world was in
* readonly mode will be flushed.
*
* @param world The world
*/
FLECS_API
void ecs_readonly_end(
ecs_world_t *world);
/** Merge world or stage.
* When automatic merging is disabled, an application can call this
* operation on either an individual stage, or on the world which will merge
* all stages. This operation may only be called when staging is not enabled
* (either after ecs_progress() or after ecs_readonly_end()).
*
* This operation may be called on an already merged stage or world.
*
* @param world The world.
*/
FLECS_API
void ecs_merge(
ecs_world_t *world);
/** Defer operations until end of frame.
* When this operation is invoked while iterating, operations inbetween the
* ecs_defer_begin() and ecs_defer_end() operations are executed at the end
* of the frame.
*
* This operation is thread safe.
*
* @param world The world.
* @return true if world changed from non-deferred mode to deferred mode.
*/
FLECS_API
bool ecs_defer_begin(
ecs_world_t *world);
/** Test if deferring is enabled for current stage.
*
* @param world The world.
* @return True if deferred, false if not.
*/
FLECS_API
bool ecs_is_deferred(
const ecs_world_t *world);
/** End block of operations to defer.
* See ecs_defer_begin().
*
* This operation is thread safe.
*
* @param world The world.
* @return true if world changed from deferred mode to non-deferred mode.
*/
FLECS_API
bool ecs_defer_end(
ecs_world_t *world);
/** Suspend deferring but do not flush queue.
* This operation can be used to do an undeferred operation while not flushing
* the operations in the queue.
*
* An application should invoke ecs_defer_resume() before ecs_defer_end() is called.
* The operation may only be called when deferring is enabled.
*
* @param world The world.
*/
FLECS_API
void ecs_defer_suspend(
ecs_world_t *world);
/** Resume deferring.
* See ecs_defer_suspend().
*
* @param world The world.
*/
FLECS_API
void ecs_defer_resume(
ecs_world_t *world);
/** Enable/disable auto-merging for world or stage.
* When auto-merging is enabled, staged data will automatically be merged with
* the world when staging ends. This happens at the end of ecs_progress(), at a
* sync point or when ecs_readonly_end() is called.
*
* Applications can exercise more control over when data from a stage is merged
* by disabling auto-merging. This requires an application to explicitly call
* ecs_merge() on the stage.
*
* When this function is invoked on the world, it sets all current stages to
* the provided value and sets the default for new stages. When this function is
* invoked on a stage, auto-merging is only set for that specific stage.
*
* @param world The world.
* @param automerge Whether to enable or disable auto-merging.
*/
FLECS_API
void ecs_set_automerge(
ecs_world_t *world,
bool automerge);
/** Configure world to have N stages.
* This initializes N stages, which allows applications to defer operations to
* multiple isolated defer queues. This is typically used for applications with
* multiple threads, where each thread gets its own queue, and commands are
* merged when threads are synchronized.
*
* Note that the ecs_set_threads() function already creates the appropriate
* number of stages. The ecs_set_stage_count() operation is useful for applications
* that want to manage their own stages and/or threads.
*
* @param world The world.
* @param stages The number of stages.
*/
FLECS_API
void ecs_set_stage_count(
ecs_world_t *world,
int32_t stages);
/** Get number of configured stages.
* Return number of stages set by ecs_set_stage_count().
*
* @param world The world.
* @return The number of stages used for threading.
*/
FLECS_API
int32_t ecs_get_stage_count(
const ecs_world_t *world);
/** Get current stage id.
* The stage id can be used by an application to learn about which stage it is
* using, which typically corresponds with the worker thread id.
*
* @param world The world.
* @return The stage id.
*/
FLECS_API
int32_t ecs_get_stage_id(
const ecs_world_t *world);
/** Get stage-specific world pointer.
* Flecs threads can safely invoke the API as long as they have a private
* context to write to, also referred to as the stage. This function returns a
* pointer to a stage, disguised as a world pointer.
*
* Note that this function does not(!) create a new world. It simply wraps the
* existing world in a thread-specific context, which the API knows how to
* unwrap. The reason the stage is returned as an ecs_world_t is so that it
* can be passed transparently to the existing API functions, vs. having to
* create a dedicated API for threading.
*
* @param world The world.
* @param stage_id The index of the stage to retrieve.
* @return A thread-specific pointer to the world.
*/
FLECS_API
ecs_world_t* ecs_get_stage(
const ecs_world_t *world,
int32_t stage_id);
/** Test whether the current world is readonly.
* This function allows the code to test whether the currently used world
* is readonly or whether it allows for writing.
*
* @param world A pointer to a stage or the world.
* @return True if the world or stage is readonly.
*/
FLECS_API
bool ecs_stage_is_readonly(
const ecs_world_t *world);
/** Create asynchronous stage.
* An asynchronous stage can be used to asynchronously queue operations for
* later merging with the world. An asynchronous stage is similar to a regular
* stage, except that it does not allow reading from the world.
*
* Asynchronous stages are never merged automatically, and must therefore be
* manually merged with the ecs_merge() function. It is not necessary to call
* ecs_defer_begin() or ecs_defer_end() before and after enqueuing commands, as an
* asynchronous stage unconditionally defers operations.
*
* The application must ensure that no commands are added to the stage while the
* stage is being merged.
*
* An asynchronous stage must be cleaned up by ecs_async_stage_free().
*
* @param world The world.
* @return The stage.
*/
FLECS_API
ecs_world_t* ecs_async_stage_new(
ecs_world_t *world);
/** Free asynchronous stage.
* The provided stage must be an asynchronous stage. If a non-asynchronous stage
* is provided, the operation will fail.
*
* @param stage The stage to free.
*/
FLECS_API
void ecs_async_stage_free(
ecs_world_t *stage);
/** Test whether provided stage is asynchronous.
*
* @param stage The stage.
* @return True when the stage is asynchronous, false for a regular stage or
* world.
*/
FLECS_API
bool ecs_stage_is_async(
ecs_world_t *stage);
/** @} */
/**
* @defgroup world_misc Misc
* @{
*/
/** Set a world context.
* This operation allows an application to register custom data with a world
* that can be accessed anywhere where the application has the world.
*
* @param world The world.
* @param ctx A pointer to a user defined structure.
* @param ctx_free A function that is invoked with ctx when the world is freed.
*/
FLECS_API
void ecs_set_ctx(
ecs_world_t *world,
void *ctx,
ecs_ctx_free_t ctx_free);
/** Set a world binding context.
* Same as ecs_set_ctx() but for binding context. A binding context is intended
* specifically for language bindings to store binding specific data.
*
* @param world The world.
* @param ctx A pointer to a user defined structure.
* @param ctx_free A function that is invoked with ctx when the world is freed.
*/
FLECS_API
void ecs_set_binding_ctx(
ecs_world_t *world,
void *ctx,
ecs_ctx_free_t ctx_free);
/** Get the world context.
* This operation retrieves a previously set world context.
*
* @param world The world.
* @return The context set with ecs_set_ctx(). If no context was set, the
* function returns NULL.
*/
FLECS_API
void* ecs_get_ctx(
const ecs_world_t *world);
/** Get the world binding context.
* This operation retrieves a previously set world binding context.
*
* @param world The world.
* @return The context set with ecs_set_binding_ctx(). If no context was set, the
* function returns NULL.
*/
FLECS_API
void* ecs_get_binding_ctx(
const ecs_world_t *world);
/** Get world info.
*
* @param world The world.
* @return Pointer to the world info. Valid for as long as the world exists.
*/
FLECS_API
const ecs_world_info_t* ecs_get_world_info(
const ecs_world_t *world);
/** Dimension the world for a specified number of entities.
* This operation will preallocate memory in the world for the specified number
* of entities. Specifying a number lower than the current number of entities in
* the world will have no effect.
*
* @param world The world.
* @param entity_count The number of entities to preallocate.
*/
FLECS_API
void ecs_dim(
ecs_world_t *world,
int32_t entity_count);
/** Set a range for issuing new entity ids.
* This function constrains the entity identifiers returned by ecs_new() to the
* specified range. This operation can be used to ensure that multiple processes
* can run in the same simulation without requiring a central service that
* coordinates issuing identifiers.
*
* If id_end is set to 0, the range is infinite. If id_end is set to a non-zero
* value, it has to be larger than id_start. If id_end is set and ecs_new is
* invoked after an id is issued that is equal to id_end, the application will
* abort.
*
* @param world The world.
* @param id_start The start of the range.
* @param id_end The end of the range.
*/
FLECS_API
void ecs_set_entity_range(
ecs_world_t *world,
ecs_entity_t id_start,
ecs_entity_t id_end);
/** Enable/disable range limits.
* When an application is both a receiver of range-limited entities and a
* producer of range-limited entities, range checking needs to be temporarily
* disabled when inserting received entities. Range checking is disabled on a
* stage, so setting this value is thread safe.
*
* @param world The world.
* @param enable True if range checking should be enabled, false to disable.
* @return The previous value.
*/
FLECS_API
bool ecs_enable_range_check(
ecs_world_t *world,
bool enable);
/** Get the largest issued entity id (not counting generation).
*
* @param world The world.
*/
FLECS_API
ecs_entity_t ecs_get_max_id(
const ecs_world_t *world);
/** Force aperiodic actions.
* The world may delay certain operations until they are necessary for the
* application to function correctly. This may cause observable side effects
* such as delayed triggering of events, which can be inconvenient when for
* example running a test suite.
*
* The flags parameter specifies which aperiodic actions to run. Specify 0 to
* run all actions. Supported flags start with 'EcsAperiodic'. Flags identify
* internal mechanisms and may change unannounced.
*
* @param world The world.
* @param flags The flags specifying which actions to run.
*/
FLECS_API
void ecs_run_aperiodic(
ecs_world_t *world,
ecs_flags32_t flags);
/** Cleanup empty tables.
* This operation cleans up empty tables that meet certain conditions. Having
* large amounts of empty tables does not negatively impact performance of the
* ECS, but can take up considerable amounts of memory, especially in
* applications with many components, and many components per entity.
*
* The generation specifies the minimum number of times this operation has
* to be called before an empty table is cleaned up. If a table becomes non
* empty, the generation is reset.
*
* The operation allows for both a "clear" generation and a "delete"
* generation. When the clear generation is reached, the table's
* resources are freed (like component arrays) but the table itself is not
* deleted. When the delete generation is reached, the empty table is deleted.
*
* By specifying a non-zero id the cleanup logic can be limited to tables with
* a specific (component) id. The operation will only increase the generation
* count of matching tables.
*
* The min_id_count specifies a lower bound for the number of components a table
* should have. Often the more components a table has, the more specific it is
* and therefore less likely to be reused.
*
* The time budget specifies how long the operation should take at most.
*
* @param world The world.
* @param id Optional component filter for the tables to evaluate.
* @param clear_generation Free table data when generation > clear_generation.
* @param delete_generation Delete table when generation > delete_generation.
* @param min_id_count Minimum number of component ids the table should have.
* @param time_budget_seconds Amount of time operation is allowed to spend.
* @return Number of deleted tables.
*/
FLECS_API
int32_t ecs_delete_empty_tables(
ecs_world_t *world,
ecs_id_t id,
uint16_t clear_generation,
uint16_t delete_generation,
int32_t min_id_count,
double time_budget_seconds);
/** Get world from poly.
*
* @param poly A pointer to a poly object.
* @return The world.
*/
FLECS_API
const ecs_world_t* ecs_get_world(
const ecs_poly_t *poly);
/** Get entity from poly.
*
* @param poly A pointer to a poly object.
* @return Entity associated with the poly object.
*/
FLECS_API
ecs_entity_t ecs_get_entity(
const ecs_poly_t *poly);
/** Test if pointer is of specified type.
* Usage:
*
* @code
* ecs_poly_is(ptr, ecs_world_t)
* @endcode
*
* This operation only works for poly types.
*
* @param object The object to test.
* @param type The id of the type.
* @return True if the pointer is of the specified type.
*/
FLECS_API
bool ecs_poly_is_(
const ecs_poly_t *object,
int32_t type);
#define ecs_poly_is(object, type)\
ecs_poly_is_(object, type##_magic)
/** Make a pair id.
* This function is equivalent to using the ecs_pair() macro, and is added for
* convenience to make it easier for non C/C++ bindings to work with pairs.
*
* @param first The first element of the pair of the pair.
* @param second The target of the pair.
*/
FLECS_API
ecs_id_t ecs_make_pair(
ecs_entity_t first,
ecs_entity_t second);
/** @} */
/** @} */
/**
* @defgroup entities Entities
* Functions for working with `ecs_entity_t`.
*
* @{
*/
/**
* @defgroup creating_entities Creating & Deleting
* Functions for creating and deleting entities.
*
* @{
*/
/** Create new entity id.
* This operation returns an unused entity id. This operation is guaranteed to
* return an empty entity as it does not use values set by ecs_set_scope() or
* ecs_set_with().
*
* @param world The world.
* @return The new entity id.
*/
FLECS_API
ecs_entity_t ecs_new_id(
ecs_world_t *world);
/** Create new low id.
* This operation returns a new low id. Entity ids start after the
* FLECS_HI_COMPONENT_ID constant. This reserves a range of low ids for things
* like components, and allows parts of the code to optimize operations.
*
* Note that FLECS_HI_COMPONENT_ID does not represent the maximum number of
* components that can be created, only the maximum number of components that
* can take advantage of these optimizations.
*
* This operation is guaranteed to return an empty entity as it does not use
* values set by ecs_set_scope() or ecs_set_with().
*
* This operation does not recycle ids.
*
* @param world The world.
* @return The new component id.
*/
FLECS_API
ecs_entity_t ecs_new_low_id(
ecs_world_t *world);
/** Create new entity with (component) id.
* This operation creates a new entity with an optional (component) id. When 0
* is passed to the id parameter, no component is added to the new entity.
*
* @param world The world.
* @param id The component id to initialize the new entity with.
* @return The new entity.
*/
FLECS_API
ecs_entity_t ecs_new_w_id(
ecs_world_t *world,
ecs_id_t id);
/** Create new entity in table.
* This operation creates a new entity in the specified table.
*
* @param world The world.
* @param table The table to which to add the new entity.
* @return The new entity.
*/
FLECS_API
ecs_entity_t ecs_new_w_table(
ecs_world_t *world,
ecs_table_t *table);
/** Find or create an entity.
* This operation creates a new entity, or modifies an existing one. When a name
* is set in the ecs_entity_desc_t::name field and ecs_entity_desc_t::entity is
* not set, the operation will first attempt to find an existing entity by that
* name. If no entity with that name can be found, it will be created.
*
* If both a name and entity handle are provided, the operation will check if
* the entity name matches with the provided name. If the names do not match,
* the function will fail and return 0.
*
* If an id to a non-existing entity is provided, that entity id become alive.
*
* See the documentation of ecs_entity_desc_t for more details.
*
* @param world The world.
* @param desc Entity init parameters.
* @return A handle to the new or existing entity, or 0 if failed.
*/
FLECS_API
ecs_entity_t ecs_entity_init(
ecs_world_t *world,
const ecs_entity_desc_t *desc);
/** Bulk create/populate new entities.
* This operation bulk inserts a list of new or predefined entities into a
* single table.
*
* The operation does not take ownership of component arrays provided by the
* application. Components that are non-trivially copyable will be moved into
* the storage.
*
* The operation will emit OnAdd events for each added id, and OnSet events for
* each component that has been set.
*
* If no entity ids are provided by the application, the returned array of ids
* points to an internal data structure which changes when new entities are
* created/deleted.
*
* If as a result of the operation triggers are invoked that deletes
* entities and no entity ids were provided by the application, the returned
* array of identifiers may be incorrect. To avoid this problem, an application
* can first call ecs_bulk_init() to create empty entities, copy the array to one
* that is owned by the application, and then use this array to populate the
* entities.
*
* @param world The world.
* @param desc Bulk creation parameters.
* @return Array with the list of entity ids created/populated.
*/
FLECS_API
const ecs_entity_t* ecs_bulk_init(
ecs_world_t *world,
const ecs_bulk_desc_t *desc);
/** Create N new entities.
* This operation is the same as ecs_new_w_id(), but creates N entities
* instead of one.
*
* @param world The world.
* @param id The component id to create the entities with.
* @param count The number of entities to create.
* @return The first entity id of the newly created entities.
*/
FLECS_API
const ecs_entity_t* ecs_bulk_new_w_id(
ecs_world_t *world,
ecs_id_t id,
int32_t count);
/** Clone an entity
* This operation clones the components of one entity into another entity. If
* no destination entity is provided, a new entity will be created. Component
* values are not copied unless copy_value is true.
*
* If the source entity has a name, it will not be copied to the destination
* entity. This is to prevent having two entities with the same name under the
* same parent, which is not allowed.
*
* @param world The world.
* @param dst The entity to copy the components to.
* @param src The entity to copy the components from.
* @param copy_value If true, the value of components will be copied to dst.
* @return The destination entity.
*/
FLECS_API
ecs_entity_t ecs_clone(
ecs_world_t *world,
ecs_entity_t dst,
ecs_entity_t src,
bool copy_value);
/** Delete an entity.
* This operation will delete an entity and all of its components. The entity id
* will be made available for recycling. If the entity passed to ecs_delete() is
* not alive, the operation will have no side effects.
*
* @param world The world.
* @param entity The entity.
*/
FLECS_API
void ecs_delete(
ecs_world_t *world,
ecs_entity_t entity);
/** Delete all entities with the specified id.
* This will delete all entities (tables) that have the specified id. The id
* may be a wildcard and/or a pair.
*
* @param world The world.
* @param id The id.
*/
FLECS_API
void ecs_delete_with(
ecs_world_t *world,
ecs_id_t id);
/** @} */
/**
* @defgroup adding_removing Adding & Removing
* Functions for adding and removing components.
*
* @{
*/
/** Add a (component) id to an entity.
* This operation adds a single (component) id to an entity. If the entity
* already has the id, this operation will have no side effects.
*
* @param world The world.
* @param entity The entity.
* @param id The id to add.
*/
FLECS_API
void ecs_add_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Remove a (component) id from an entity.
* This operation removes a single (component) id to an entity. If the entity
* does not have the id, this operation will have no side effects.
*
* @param world The world.
* @param entity The entity.
* @param id The id to remove.
*/
FLECS_API
void ecs_remove_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Add override for (component) id.
* Adding an override to an entity ensures that when the entity is instantiated
* (by adding an IsA relationship to it) the component with the override is
* copied to a component that is private to the instance. By default components
* reachable through an IsA relationship are shared.
*
* Adding an override does not add the component. If an override is added to an
* entity that does not have the component, it will still be added to the
* instance, but with an uninitialized value (unless the component has a ctor).
* When the entity does have the entity, the component of the instance will be
* initialized with the value of the component on the entity.
*
* This is the same as what happens when calling ecs_add_id() for an id that is
* inherited (reachable through an IsA relationship).
*
* This operation is equivalent to doing:
*
* @code
* ecs_add_id(world, entity, ECS_OVERRIDE | id);
* @endcode
*
* @param world The world.
* @param entity The entity.
* @param id The id to override.
*/
FLECS_API
void ecs_override_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Clear all components.
* This operation will remove all components from an entity.
*
* @param world The world.
* @param entity The entity.
*/
FLECS_API
void ecs_clear(
ecs_world_t *world,
ecs_entity_t entity);
/** Remove all instances of the specified (component) id.
* This will remove the specified id from all entities (tables). The id may be
* a wildcard and/or a pair.
*
* @param world The world.
* @param id The id.
*/
FLECS_API
void ecs_remove_all(
ecs_world_t *world,
ecs_id_t id);
/** Set current with id.
* New entities are automatically created with the specified id.
*
* @param world The world.
* @param id The id.
* @return The previous id.
*/
FLECS_API
ecs_entity_t ecs_set_with(
ecs_world_t *world,
ecs_id_t id);
/** Get current with id.
* Get the id set with ecs_set_with().
*
* @param world The world.
* @return The last id provided to ecs_set_with().
*/
FLECS_API
ecs_id_t ecs_get_with(
const ecs_world_t *world);
/** @} */
/**
* @defgroup enabling_disabling Enabling & Disabling
* Functions for enabling/disabling entities and components.
*
* @{
*/
/** Enable or disable entity.
* This operation enables or disables an entity by adding or removing the
* EcsDisabled tag. A disabled entity will not be matched with any systems,
* unless the system explicitly specifies the EcsDisabled tag.
*
* @param world The world.
* @param entity The entity to enable or disable.
* @param enabled true to enable the entity, false to disable.
*/
FLECS_API
void ecs_enable(
ecs_world_t *world,
ecs_entity_t entity,
bool enabled);
/** Enable or disable component.
* Enabling or disabling a component does not add or remove a component from an
* entity, but prevents it from being matched with queries. This operation can
* be useful when a component must be temporarily disabled without destroying
* its value. It is also a more performant operation for when an application
* needs to add/remove components at high frequency, as enabling/disabling is
* cheaper than a regular add or remove.
*
* @param world The world.
* @param entity The entity.
* @param id The component.
* @param enable True to enable the component, false to disable.
*/
FLECS_API
void ecs_enable_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id,
bool enable);
/** Test if component is enabled.
* Test whether a component is currently enabled or disabled. This operation
* will return true when the entity has the component and if it has not been
* disabled by ecs_enable_component().
*
* @param world The world.
* @param entity The entity.
* @param id The component.
* @return True if the component is enabled, otherwise false.
*/
FLECS_API
bool ecs_is_enabled_id(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** @} */
/**
* @defgroup getting Getting & Setting
* Functions for getting/setting components.
*
* @{
*/
/** Get an immutable pointer to a component.
* This operation obtains a const pointer to the requested component. The
* operation accepts the component entity id.
*
* @param world The world.
* @param entity The entity.
* @param id The id of the component to get.
* @return The component pointer, NULL if the entity does not have the component.
*/
FLECS_API
const void* ecs_get_id(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Create a component ref.
* A ref is a handle to an entity + component which caches a small amount of
* data to reduce overhead of repeatedly accessing the component. Use
* ecs_ref_get() to get the component data.
*
* @param world The world.
* @param entity The entity.
* @param id The id of the component.
* @return The reference.
*/
FLECS_API
ecs_ref_t ecs_ref_init_id(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Get component from ref.
* Get component pointer from ref. The ref must be created with ecs_ref_init().
*
* @param world The world.
* @param ref The ref.
* @param id The component id.
* @return The component pointer, NULL if the entity does not have the component.
*/
FLECS_API
void* ecs_ref_get_id(
const ecs_world_t *world,
ecs_ref_t *ref,
ecs_id_t id);
/** Update ref.
* Ensures contents of ref are up to date. Same as ecs_ref_get_id(), but does not
* return pointer to component id.
*
* @param world The world.
* @param ref The ref.
*/
FLECS_API
void ecs_ref_update(
const ecs_world_t *world,
ecs_ref_t *ref);
/** Get a mutable pointer to a component.
* This operation returns a mutable pointer to a component. If the component did
* not yet exist, it will be added.
*
* If get_mut is called when the world is in deferred/readonly mode, the
* function will:
* - return a pointer to a temp storage if the component does not yet exist, or
* - return a pointer to the existing component if it exists
*
* @param world The world.
* @param entity The entity.
* @param id The entity id of the component to obtain.
* @return The component pointer.
*/
FLECS_API
void* ecs_get_mut_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Combines get_mut + modified in single operation.
* This operation is a more efficient alternative to calling ecs_get_mut_id() and
* ecs_modified_id() separately. This operation is only valid when the world is in
* deferred mode, which ensures that the Modified event is not emitted before
* the modification takes place.
*
* @param world The world.
* @param entity The entity.
* @param id The id of the component to obtain.
* @return The component pointer.
*/
FLECS_API
void* ecs_get_mut_modified_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Begin exclusive write access to entity.
* This operation provides safe exclusive access to the components of an entity
* without the overhead of deferring operations.
*
* When this operation is called simultaneously for the same entity more than
* once it will throw an assert. Note that for this to happen, asserts must be
* enabled. It is up to the application to ensure that access is exclusive, for
* example by using a read-write mutex.
*
* Exclusive access is enforced at the table level, so only one entity can be
* exclusively accessed per table. The exclusive access check is thread safe.
*
* This operation must be followed up with ecs_write_end().
*
* @param world The world.
* @param entity The entity.
* @return A record to the entity.
*/
FLECS_API
ecs_record_t* ecs_write_begin(
ecs_world_t *world,
ecs_entity_t entity);
/** End exclusive write access to entity.
* This operation ends exclusive access, and must be called after
* ecs_write_begin().
*
* @param record Record to the entity.
*/
FLECS_API
void ecs_write_end(
ecs_record_t *record);
/** Begin read access to entity.
* This operation provides safe read access to the components of an entity.
* Multiple simultaneous reads are allowed per entity.
*
* This operation ensures that code attempting to mutate the entity's table will
* throw an assert. Note that for this to happen, asserts must be enabled. It is
* up to the application to ensure that this does not happen, for example by
* using a read-write mutex.
*
* This operation does *not* provide the same guarantees as a read-write mutex,
* as it is possible to call ecs_read_begin() after calling ecs_write_begin(). It is
* up to application has to ensure that this does not happen.
*
* This operation must be followed up with ecs_read_end().
*
* @param world The world.
* @param entity The entity.
* @return A record to the entity.
*/
FLECS_API
const ecs_record_t* ecs_read_begin(
ecs_world_t *world,
ecs_entity_t entity);
/** End read access to entity.
* This operation ends read access, and must be called after ecs_read_begin().
*
* @param record Record to the entity.
*/
FLECS_API
void ecs_read_end(
const ecs_record_t *record);
/** Get entity corresponding with record.
* This operation only works for entities that are not empty.
*
* @param record The record for which to obtain the entity id.
*/
FLECS_API
ecs_entity_t ecs_record_get_entity(
const ecs_record_t *record);
/** Get component from entity record.
* This operation returns a pointer to a component for the entity
* associated with the provided record. For safe access to the component, obtain
* the record with ecs_read_begin() or ecs_write_begin().
*
* Obtaining a component from a record is faster than obtaining it from the
* entity handle, as it reduces the number of lookups required.
*
* @param world The world.
* @param record Record to the entity.
* @param id The (component) id.
* @return Pointer to component, or NULL if entity does not have the component.
*/
FLECS_API
const void* ecs_record_get_id(
const ecs_world_t *world,
const ecs_record_t *record,
ecs_id_t id);
/** Same as ecs_record_get_id(), but returns a mutable pointer.
* For safe access to the component, obtain the record with ecs_write_begin().
*
* @param world The world.
* @param record Record to the entity.
* @param id The (component) id.
* @return Pointer to component, or NULL if entity does not have the component.
*/
FLECS_API
void* ecs_record_get_mut_id(
ecs_world_t *world,
ecs_record_t *record,
ecs_id_t id);
/** Test if entity for record has component.
*
* @param world The world.
* @param record Record to the entity.
* @param id The (component) id.
*/
FLECS_API
bool ecs_record_has_id(
ecs_world_t *world,
const ecs_record_t *record,
ecs_id_t id);
/** Emplace a component.
* Emplace is similar to ecs_get_mut_id() except that the component constructor is not
* invoked for the returned pointer, allowing the component to be "constructed"
* directly in the storage.
*
* Emplace can only be used if the entity does not yet have the component. If
* the entity has the component, the operation will fail.
*
* @param world The world.
* @param entity The entity.
* @param id The component to obtain.
* @return The (uninitialized) component pointer.
*/
FLECS_API
void* ecs_emplace_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Signal that a component has been modified.
* This operation is usually used after modifying a component value obtained by
* ecs_get_mut_id(). The operation will mark the component as dirty, and invoke
* OnSet observers and hooks.
*
* @param world The world.
* @param entity The entity.
* @param id The id of the component that was modified.
*/
FLECS_API
void ecs_modified_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Set the value of a component.
* This operation allows an application to set the value of a component. The
* operation is equivalent to calling ecs_get_mut_id() followed by
* ecs_modified_id(). The operation will not modify the value of the passed in
* component. If the component has a copy hook registered, it will be used to
* copy in the component.
*
* If the provided entity is 0, a new entity will be created.
*
* @param world The world.
* @param entity The entity.
* @param id The id of the component to set.
* @param size The size of the pointed-to value.
* @param ptr The pointer to the value.
* @return The entity. A new entity if no entity was provided.
*/
FLECS_API
ecs_entity_t ecs_set_id(
ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id,
size_t size,
const void *ptr);
/** @} */
/**
* @defgroup liveliness Entity Liveliness
* Functions for testing and modifying entity liveliness.
*
* @{
*/
/** Test whether an entity is valid.
* Entities that are valid can be used with API functions. Using invalid
* entities with API operations will cause the function to panic.
*
* An entity is valid if it is not 0 and if it is alive.
*
* ecs_is_valid() will return true for ids that don't exist (alive or not alive). This
* allows for using ids that have never been created by ecs_new() or similar. In
* this the function differs from ecs_is_alive(), which will return false for
* entities that do not yet exist.
*
* The operation will return false for an id that exists and is not alive, as
* using this id with an API operation would cause it to assert.
*
* @param world The world.
* @param e The entity.
* @return True if the entity is valid, false if the entity is not valid.
*/
FLECS_API
bool ecs_is_valid(
const ecs_world_t *world,
ecs_entity_t e);
/** Test whether an entity is alive.
* Entities are alive after they are created, and become not alive when they are
* deleted. Operations that return alive ids are (amongst others) ecs_new_id(),
* ecs_new_low_id() and ecs_entity_init(). Ids can be made alive with the ecs_ensure()
* function.
*
* After an id is deleted it can be recycled. Recycled ids are different from
* the original id in that they have a different generation count. This makes it
* possible for the API to distinguish between the two. An example:
*
* @code
* ecs_entity_t e1 = ecs_new_id(world);
* ecs_is_alive(world, e1); // true
* ecs_delete(world, e1);
* ecs_is_alive(world, e1); // false
*
* ecs_entity_t e2 = ecs_new_id(world); // recycles e1
* ecs_is_alive(world, e2); // true
* ecs_is_alive(world, e1); // false
* @endcode
*
* @param world The world.
* @param e The entity.
* @return True if the entity is alive, false if the entity is not alive.
*/
FLECS_API
bool ecs_is_alive(
const ecs_world_t *world,
ecs_entity_t e);
/** Remove generation from entity id.
*
* @param e The entity id.
* @return The entity id without the generation count.
*/
FLECS_API
ecs_id_t ecs_strip_generation(
ecs_entity_t e);
/** Override the generation of an entity.
* The generation count of an entity is increased each time an entity is deleted
* and is used to test whether an entity id is alive.
*
* This operation overrides the current generation of an entity with the
* specified generation, which can be useful if an entity is externally managed,
* like for external pools, savefiles or netcode.
*
* @param world The world.
* @param entity Entity for which to set the generation with the new generation.
*/
FLECS_API
void ecs_set_entity_generation(
ecs_world_t *world,
ecs_entity_t entity);
/** Get alive identifier.
* In some cases an application may need to work with identifiers from which
* the generation has been stripped. A typical scenario in which this happens is
* when iterating relationships in an entity type.
*
* For example, when obtaining the parent id from a ChildOf relationship, the parent
* (second element of the pair) will have been stored in a 32 bit value, which
* cannot store the entity generation. This function can retrieve the identifier
* with the current generation for that id.
*
* If the provided identifier is not alive, the function will return 0.
*
* @param world The world.
* @param e The for which to obtain the current alive entity id.
* @return The alive entity id if there is one, or 0 if the id is not alive.
*/
FLECS_API
ecs_entity_t ecs_get_alive(
const ecs_world_t *world,
ecs_entity_t e);
/** Ensure id is alive.
* This operation ensures that the provided id is alive. This is useful in
* scenarios where an application has an existing id that has not been created
* with ecs_new() (such as a global constant or an id from a remote application).
*
* When this operation is successful it guarantees that the provided id exists,
* is valid and is alive.
*
* Before this operation the id must either not be alive or have a generation
* that is equal to the passed in entity.
*
* If the provided id has a non-zero generation count and the id does not exist
* in the world, the id will be created with the specified generation.
*
* If the provided id is alive and has a generation count that does not match
* the provided id, the operation will fail.
*
* @param world The world.
* @param entity The entity id to make alive.
*/
FLECS_API
void ecs_ensure(
ecs_world_t *world,
ecs_entity_t entity);
/** Same as ecs_ensure(), but for (component) ids.
* An id can be an entity or pair, and can contain id flags. This operation
* ensures that the entity (or entities, for a pair) are alive.
*
* When this operation is successful it guarantees that the provided id can be
* used in operations that accept an id.
*
* Since entities in a pair do not encode their generation ids, this operation
* will not fail when an entity with non-zero generation count already exists in
* the world.
*
* This is different from ecs_ensure(), which will fail if attempted with an id
* that has generation 0 and an entity with a non-zero generation is currently
* alive.
*
* @param world The world.
* @param id The id to make alive.
*/
FLECS_API
void ecs_ensure_id(
ecs_world_t *world,
ecs_id_t id);
/** Test whether an entity exists.
* Similar as ecs_is_alive(), but ignores entity generation count.
*
* @param world The world.
* @param entity The entity.
* @return True if the entity exists, false if the entity does not exist.
*/
FLECS_API
bool ecs_exists(
const ecs_world_t *world,
ecs_entity_t entity);
/** @} */
/**
* @defgroup entity_info Entity Information.
* Get information from entity.
*
* @{
*/
/** Get the type of an entity.
*
* @param world The world.
* @param entity The entity.
* @return The type of the entity, NULL if the entity has no components.
*/
FLECS_API
const ecs_type_t* ecs_get_type(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get the table of an entity.
*
* @param world The world.
* @param entity The entity.
* @return The table of the entity, NULL if the entity has no components/tags.
*/
FLECS_API
ecs_table_t* ecs_get_table(
const ecs_world_t *world,
ecs_entity_t entity);
/** Convert type to string.
* The result of this operation must be freed with ecs_os_free().
*
* @param world The world.
* @param type The type.
* @return The stringified type.
*/
FLECS_API
char* ecs_type_str(
const ecs_world_t *world,
const ecs_type_t* type);
/** Convert table to string.
* Same as ecs_type_str(world, ecs_table_get_type(table)). The result of this
* operation must be freed with ecs_os_free().
*
* @param world The world.
* @param table The table.
* @return The stringified table type.
*/
FLECS_API
char* ecs_table_str(
const ecs_world_t *world,
const ecs_table_t *table);
/** Convert entity to string.
* Same as combining:
* - ecs_get_fullpath(world, entity)
* - ecs_type_str(world, ecs_get_type(world, entity))
*
* The result of this operation must be freed with ecs_os_free().
*
* @param world The world.
* @param entity The entity.
* @return The entity path with stringified type.
*/
FLECS_API
char* ecs_entity_str(
const ecs_world_t *world,
ecs_entity_t entity);
/** Test if an entity has an id.
* This operation returns true if the entity has or inherits the specified id.
*
* @param world The world.
* @param entity The entity.
* @param id The id to test for.
* @return True if the entity has the id, false if not.
*/
FLECS_API
bool ecs_has_id(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Test if an entity owns an id.
* This operation returns true if the entity has the specified id. The operation
* behaves the same as ecs_has_id(), except that it will return false for
* components that are inherited through an IsA relationship.
*
* @param world The world.
* @param entity The entity.
* @param id The id to test for.
* @return True if the entity has the id, false if not.
*/
FLECS_API
bool ecs_owns_id(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_id_t id);
/** Get the target of a relationship.
* This will return a target (second element of a pair) of the entity for the
* specified relationship. The index allows for iterating through the targets,
* if a single entity has multiple targets for the same relationship.
*
* If the index is larger than the total number of instances the entity has for
* the relationship, the operation will return 0.
*
* @param world The world.
* @param entity The entity.
* @param rel The relationship between the entity and the target.
* @param index The index of the relationship instance.
* @return The target for the relationship at the specified index.
*/
FLECS_API
ecs_entity_t ecs_get_target(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_entity_t rel,
int32_t index);
/** Get parent (target of ChildOf relationship) for entity.
* This operation is the same as calling:
*
* @code
* ecs_get_target(world, entity, EcsChildOf, 0);
* @endcode
*
* @param world The world.
* @param entity The entity.
* @return The parent of the entity, 0 if the entity has no parent.
*/
FLECS_API
ecs_entity_t ecs_get_parent(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get the target of a relationship for a given id.
* This operation returns the first entity that has the provided id by following
* the specified relationship. If the entity itself has the id then entity will
* be returned. If the id cannot be found on the entity or by following the
* relationship, the operation will return 0.
*
* This operation can be used to lookup, for example, which prefab is providing
* a component by specifying the IsA relationship:
*
* @code
* // Is Position provided by the entity or one of its base entities?
* ecs_get_target_for_id(world, entity, EcsIsA, ecs_id(Position))
* @endcode
*
* @param world The world.
* @param entity The entity.
* @param rel The relationship to follow.
* @param id The id to lookup.
* @return The entity for which the target has been found.
*/
FLECS_API
ecs_entity_t ecs_get_target_for_id(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_entity_t rel,
ecs_id_t id);
/** Return depth for entity in tree for the specified relationship.
* Depth is determined by counting the number of targets encountered while
* traversing up the relationship tree for rel. Only acyclic relationships are
* supported.
*
* @param world The world.
* @param entity The entity.
* @param rel The relationship.
* @return The depth of the entity in the tree.
*/
FLECS_API
int32_t ecs_get_depth(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_entity_t rel);
typedef struct ecs_flatten_desc_t {
/* When true, the flatten operation will not remove names from entities in
* the flattened tree. This may fail if entities from different subtrees
* have the same name. */
bool keep_names;
/* When true, the flattened tree won't contain information about the
* original depth of the entities. This can reduce fragmentation, but may
* cause existing code, such as cascade queries, to no longer work. */
bool lose_depth;
} ecs_flatten_desc_t;
/** Recursively flatten relationship for target entity (experimental).
* This operation combines entities in the subtree of the specified pair from
* different parents in the same table. This can reduce memory fragmentation
* and reduces the number of tables in the storage, which improves RAM
* utilization and various other operations, such as entity cleanup.
*
* The lifecycle of entities in a fixed subtree are bound to the specified
* parent. Entities in a fixed subtree cannot be deleted individually. Entities
* can also not change the target of the fixed relationship, which includes
* removing the relationship.
*
* Entities in a fixed subtree are still fragmented on subtree depth. This
* ensures that entities can still be iterated in breadth-first order with the
* cascade query modifier.
*
* The current implementation is limited to exclusive acyclic relationships, and
* does not allow for adding/removing to entities in flattened tables. An entity
* may only be flattened for a single relationship. Future iterations of the
* feature may remove these limitations.
*
* @param world The world.
* @param pair The relationship pair from which to start flattening.
* @param desc Options for flattening the tree.
*/
FLECS_API
void ecs_flatten(
ecs_world_t *world,
ecs_id_t pair,
const ecs_flatten_desc_t *desc);
/** Count entities that have the specified id.
* Returns the number of entities that have the specified id.
*
* @param world The world.
* @param entity The id to search for.
* @return The number of entities that have the id.
*/
FLECS_API
int32_t ecs_count_id(
const ecs_world_t *world,
ecs_id_t entity);
/** @} */
/**
* @defgroup paths Entity Names
* Functions for working with entity names and paths.
*
* @{
*/
/** Get the name of an entity.
* This will return the name stored in (EcsIdentifier, EcsName).
*
* @param world The world.
* @param entity The entity.
* @return The type of the entity, NULL if the entity has no name.
*/
FLECS_API
const char* ecs_get_name(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get the symbol of an entity.
* This will return the symbol stored in (EcsIdentifier, EcsSymbol).
*
* @param world The world.
* @param entity The entity.
* @return The type of the entity, NULL if the entity has no name.
*/
FLECS_API
const char* ecs_get_symbol(
const ecs_world_t *world,
ecs_entity_t entity);
/** Set the name of an entity.
* This will set or overwrite the name of an entity. If no entity is provided,
* a new entity will be created.
*
* The name is stored in (EcsIdentifier, EcsName).
*
* @param world The world.
* @param entity The entity.
* @param name The name.
* @return The provided entity, or a new entity if 0 was provided.
*/
FLECS_API
ecs_entity_t ecs_set_name(
ecs_world_t *world,
ecs_entity_t entity,
const char *name);
/** Set the symbol of an entity.
* This will set or overwrite the symbol of an entity. If no entity is provided,
* a new entity will be created.
*
* The symbol is stored in (EcsIdentifier, EcsSymbol).
*
* @param world The world.
* @param entity The entity.
* @param symbol The symbol.
* @return The provided entity, or a new entity if 0 was provided.
*/
FLECS_API
ecs_entity_t ecs_set_symbol(
ecs_world_t *world,
ecs_entity_t entity,
const char *symbol);
/** Set alias for entity.
* An entity can be looked up using its alias from the root scope without
* providing the fully qualified name if its parent. An entity can only have
* a single alias.
*
* The symbol is stored in (EcsIdentifier, EcsAlias).
*
* @param world The world.
* @param entity The entity.
* @param alias The alias.
*/
FLECS_API
void ecs_set_alias(
ecs_world_t *world,
ecs_entity_t entity,
const char *alias);
/** Lookup an entity by name.
* Returns an entity that matches the specified name. Only looks for entities in
* the current scope (root if no scope is provided).
*
* @param world The world.
* @param name The entity name.
* @return The entity with the specified name, or 0 if no entity was found.
*/
FLECS_API
ecs_entity_t ecs_lookup(
const ecs_world_t *world,
const char *name);
/** Lookup a child entity by name.
* Returns an entity that matches the specified name. Only looks for entities in
* the provided parent. If no parent is provided, look in the current scope (
* root if no scope is provided).
*
* @param world The world.
* @param name The entity name.
* @return The entity with the specified name, or 0 if no entity was found.
*/
FLECS_API
ecs_entity_t ecs_lookup_child(
const ecs_world_t *world,
ecs_entity_t parent,
const char *name);
/** Lookup an entity from a path.
* Lookup an entity from a provided path, relative to the provided parent. The
* operation will use the provided separator to tokenize the path expression. If
* the provided path contains the prefix, the search will start from the root.
*
* If the entity is not found in the provided parent, the operation will
* continue to search in the parent of the parent, until the root is reached. If
* the entity is still not found, the lookup will search in the flecs.core
* scope. If the entity is not found there either, the function returns 0.
*
* @param world The world.
* @param parent The entity from which to resolve the path.
* @param path The path to resolve.
* @param sep The path separator.
* @param prefix The path prefix.
* @param recursive Recursively traverse up the tree until entity is found.
* @return The entity if found, else 0.
*/
FLECS_API
ecs_entity_t ecs_lookup_path_w_sep(
const ecs_world_t *world,
ecs_entity_t parent,
const char *path,
const char *sep,
const char *prefix,
bool recursive);
/** Lookup an entity by its symbol name.
* This looks up an entity by symbol stored in (EcsIdentifier, EcsSymbol). The
* operation does not take into account hierarchies.
*
* This operation can be useful to resolve, for example, a type by its C
* identifier, which does not include the Flecs namespacing.
*
* @param world The world.
* @param symbol The symbol.
* @param lookup_as_path If not found as a symbol, lookup as path.
* @param recursive If looking up as path, recursively traverse up the tree.
* @return The entity if found, else 0.
*/
FLECS_API
ecs_entity_t ecs_lookup_symbol(
const ecs_world_t *world,
const char *symbol,
bool lookup_as_path,
bool recursive);
/** Get a path identifier for an entity.
* This operation creates a path that contains the names of the entities from
* the specified parent to the provided entity, separated by the provided
* separator. If no parent is provided the path will be relative to the root. If
* a prefix is provided, the path will be prefixed by the prefix.
*
* If the parent is equal to the provided child, the operation will return an
* empty string. If a nonzero component is provided, the path will be created by
* looking for parents with that component.
*
* The returned path should be freed by the application.
*
* @param world The world.
* @param parent The entity from which to create the path.
* @param child The entity to which to create the path.
* @param sep The separator to use between path elements.
* @param prefix The initial character to use for root elements.
* @return The relative entity path.
*/
FLECS_API
char* ecs_get_path_w_sep(
const ecs_world_t *world,
ecs_entity_t parent,
ecs_entity_t child,
const char *sep,
const char *prefix);
/** Write path identifier to buffer.
* Same as ecs_get_path_w_sep(), but writes result to an ecs_strbuf_t.
*
* @param world The world.
* @param parent The entity from which to create the path.
* @param child The entity to which to create the path.
* @param sep The separator to use between path elements.
* @param prefix The initial character to use for root elements.
* @param buf The buffer to write to.
*/
void ecs_get_path_w_sep_buf(
const ecs_world_t *world,
ecs_entity_t parent,
ecs_entity_t child,
const char *sep,
const char *prefix,
ecs_strbuf_t *buf);
/** Find or create entity from path.
* This operation will find or create an entity from a path, and will create any
* intermediate entities if required. If the entity already exists, no entities
* will be created.
*
* If the path starts with the prefix, then the entity will be created from the
* root scope.
*
* @param world The world.
* @param parent The entity relative to which the entity should be created.
* @param path The path to create the entity for.
* @param sep The separator used in the path.
* @param prefix The prefix used in the path.
* @return The entity.
*/
FLECS_API
ecs_entity_t ecs_new_from_path_w_sep(
ecs_world_t *world,
ecs_entity_t parent,
const char *path,
const char *sep,
const char *prefix);
/** Add specified path to entity.
* This operation is similar to ecs_new_from_path(), but will instead add the path
* to an existing entity.
*
* If an entity already exists for the path, it will be returned instead.
*
* @param world The world.
* @param entity The entity to which to add the path.
* @param parent The entity relative to which the entity should be created.
* @param path The path to create the entity for.
* @param sep The separator used in the path.
* @param prefix The prefix used in the path.
* @return The entity.
*/
FLECS_API
ecs_entity_t ecs_add_path_w_sep(
ecs_world_t *world,
ecs_entity_t entity,
ecs_entity_t parent,
const char *path,
const char *sep,
const char *prefix);
/** Set the current scope.
* This operation sets the scope of the current stage to the provided entity.
* As a result new entities will be created in this scope, and lookups will be
* relative to the provided scope.
*
* It is considered good practice to restore the scope to the old value.
*
* @param world The world.
* @param scope The entity to use as scope.
* @return The previous scope.
*/
FLECS_API
ecs_entity_t ecs_set_scope(
ecs_world_t *world,
ecs_entity_t scope);
/** Get the current scope.
* Get the scope set by ecs_set_scope(). If no scope is set, this operation will
* return 0.
*
* @param world The world.
* @return The current scope.
*/
FLECS_API
ecs_entity_t ecs_get_scope(
const ecs_world_t *world);
/** Set a name prefix for newly created entities.
* This is a utility that lets C modules use prefixed names for C types and
* C functions, while using names for the entity names that do not have the
* prefix. The name prefix is currently only used by ECS_COMPONENT.
*
* @param world The world.
* @param prefix The name prefix to use.
* @return The previous prefix.
*/
FLECS_API
const char* ecs_set_name_prefix(
ecs_world_t *world,
const char *prefix);
/** Set search path for lookup operations.
* This operation accepts an array of entity ids that will be used as search
* scopes by lookup operations. The operation returns the current search path.
* It is good practice to restore the old search path.
*
* The search path will be evaluated starting from the last element.
*
* The default search path includes flecs.core. When a custom search path is
* provided it overwrites the existing search path. Operations that rely on
* looking up names from flecs.core without providing the namespace may fail if
* the custom search path does not include flecs.core (EcsFlecsCore).
*
* The search path array is not copied into managed memory. The application must
* ensure that the provided array is valid for as long as it is used as the
* search path.
*
* The provided array must be terminated with a 0 element. This enables an
* application to push/pop elements to an existing array without invoking the
* ecs_set_lookup_path() operation again.
*
* @param world The world.
* @param lookup_path 0-terminated array with entity ids for the lookup path.
* @return Current lookup path array.
*/
FLECS_API
ecs_entity_t* ecs_set_lookup_path(
ecs_world_t *world,
const ecs_entity_t *lookup_path);
/** Get current lookup path.
* Returns value set by ecs_set_lookup_path().
*
* @param world The world.
* @return The current lookup path.
*/
FLECS_API
ecs_entity_t* ecs_get_lookup_path(
const ecs_world_t *world);
/** @} */
/** @} */
/**
* @defgroup components Components
* Functions for registering and working with components.
*
* @{
*/
/** Find or create a component.
* This operation creates a new component, or finds an existing one. The find or
* create behavior is the same as ecs_entity_init().
*
* When an existing component is found, the size and alignment are verified with
* the provided values. If the values do not match, the operation will fail.
*
* See the documentation of ecs_component_desc_t for more details.
*
* @param world The world.
* @param desc Component init parameters.
* @return A handle to the new or existing component, or 0 if failed.
*/
FLECS_API
ecs_entity_t ecs_component_init(
ecs_world_t *world,
const ecs_component_desc_t *desc);
/** Get the type for an id.
* This function returns the type information for an id. The specified id can be
* any valid id. For the rules on how type information is determined based on
* id, see ecs_get_typeid().
*
* @param world The world.
* @param id The id.
* @return The type information of the id.
*/
FLECS_API
const ecs_type_info_t* ecs_get_type_info(
const ecs_world_t *world,
ecs_id_t id);
/** Register hooks for component.
* Hooks allow for the execution of user code when components are constructed,
* copied, moved, destructed, added, removed or set. Hooks can be assigned as
* as long as a component has not yet been used (added to an entity).
*
* The hooks that are currently set can be accessed with ecs_get_type_info().
*
* @param world The world.
* @param id The component id for which to register the actions
* @param hooks Type that contains the component actions.
*/
FLECS_API
void ecs_set_hooks_id(
ecs_world_t *world,
ecs_entity_t id,
const ecs_type_hooks_t *hooks);
/** Get hooks for component.
*
* @param world The world.
* @param id The component id for which to retrieve the hooks.
* @return The hooks for the component, or NULL if not registered.
*/
FLECS_API
const ecs_type_hooks_t* ecs_get_hooks_id(
ecs_world_t *world,
ecs_entity_t id);
/** @} */
/**
* @defgroup ids Ids
* Functions for working with `ecs_id_t`.
*
* @{
*/
/** Returns whether specified id a tag.
* This operation returns whether the specified type is a tag (a component
* without data/size).
*
* An id is a tag when:
* - it is an entity without the EcsComponent component
* - it has an EcsComponent with size member set to 0
* - it is a pair where both elements are a tag
* - it is a pair where the first element has the EcsTag tag
*
* @param world The world.
* @param id The id.
* @return Whether the provided id is a tag.
*/
FLECS_API
bool ecs_id_is_tag(
const ecs_world_t *world,
ecs_id_t id);
/** Return whether represents a union.
* This operation returns whether the specified type represents a union. Only
* pair ids can be unions.
*
* An id represents a union when:
* - The first element of the pair is EcsUnion/flecs::Union
* - The first element of the pair has EcsUnion/flecs::Union
*
* @param world The world.
* @param id The id.
* @return Whether the provided id represents a union.
*/
FLECS_API
bool ecs_id_is_union(
const ecs_world_t *world,
ecs_id_t id);
/** Returns whether specified id is in use.
* This operation returns whether an id is in use in the world. An id is in use
* if it has been added to one or more tables.
*
* @param world The world.
* @param id The id.
* @return Whether the id is in use.
*/
FLECS_API
bool ecs_id_in_use(
const ecs_world_t *world,
ecs_id_t id);
/** Get the type for an id.
* This operation returns the component id for an id, if the id is associated
* with a type. For a regular component with a non-zero size (an entity with the
* EcsComponent component) the operation will return the entity itself.
*
* For an entity that does not have the EcsComponent component, or with an
* EcsComponent value with size 0, the operation will return 0.
*
* For a pair id the operation will return the type associated with the pair, by
* applying the following rules in order:
* - The first pair element is returned if it is a component
* - 0 is returned if the relationship entity has the Tag property
* - The second pair element is returned if it is a component
* - 0 is returned.
*
* @param world The world.
* @param id The id.
* @return The type id of the id.
*/
FLECS_API
ecs_entity_t ecs_get_typeid(
const ecs_world_t *world,
ecs_id_t id);
/** Utility to match an id with a pattern.
* This operation returns true if the provided pattern matches the provided
* id. The pattern may contain a wildcard (or wildcards, when a pair).
*
* @param id The id.
* @param pattern The pattern to compare with.
*/
FLECS_API
bool ecs_id_match(
ecs_id_t id,
ecs_id_t pattern);
/** Utility to check if id is a pair.
*
* @param id The id.
* @return True if id is a pair.
*/
FLECS_API
bool ecs_id_is_pair(
ecs_id_t id);
/** Utility to check if id is a wildcard.
*
* @param id The id.
* @return True if id is a wildcard or a pair containing a wildcard.
*/
FLECS_API
bool ecs_id_is_wildcard(
ecs_id_t id);
/** Utility to check if id is valid.
* A valid id is an id that can be added to an entity. Invalid ids are:
* - ids that contain wildcards
* - ids that contain invalid entities
* - ids that are 0 or contain 0 entities
*
* Note that the same rules apply to removing from an entity, with the exception
* of wildcards.
*
* @param world The world.
* @param id The id.
* @return True if the id is valid.
*/
FLECS_API
bool ecs_id_is_valid(
const ecs_world_t *world,
ecs_id_t id);
/** Get flags associated with id.
* This operation returns the internal flags (see api_flags.h) that are
* associated with the provided id.
*
* @param world The world.
* @param id The id.
* @return Flags associated with the id, or 0 if the id is not in use.
*/
FLECS_API
ecs_flags32_t ecs_id_get_flags(
const ecs_world_t *world,
ecs_id_t id);
/** Convert id flag to string.
* This operation converts a id flag to a string.
*
* @param id_flags The id flag.
* @return The id flag string, or NULL if no valid id is provided.
*/
FLECS_API
const char* ecs_id_flag_str(
ecs_id_t id_flags);
/** Convert id to string.
* This operation interprets the structure of an id and converts it to a string.
*
* @param world The world.
* @param id The id to convert to a string.
* @return The id converted to a string.
*/
FLECS_API
char* ecs_id_str(
const ecs_world_t *world,
ecs_id_t id);
/** Write id string to buffer.
* Same as ecs_id_str() but writes result to ecs_strbuf_t.
*
* @param world The world.
* @param id The id to convert to a string.
* @param buf The buffer to write to.
*/
FLECS_API
void ecs_id_str_buf(
const ecs_world_t *world,
ecs_id_t id,
ecs_strbuf_t *buf);
/** @} */
/**
* @defgroup filters Filters
* Functions for working with `ecs_term_t` and `ecs_filter_t`.
*
* @{
*/
/** Iterator for a single (component) id.
* A term iterator returns all entities (tables) that match a single (component)
* id. The search for the matching set of entities (tables) is performed in
* constant time.
*
* @param world The world.
* @param term The term.
* @return The iterator.
*/
FLECS_API
ecs_iter_t ecs_term_iter(
const ecs_world_t *world,
ecs_term_t *term);
/** Return a chained term iterator.
* A chained iterator applies a filter to the results of the input iterator. The
* resulting iterator must be iterated with ecs_term_next().
*
* @param it The input iterator
* @param term The term filter to apply to the iterator.
* @return The chained iterator.
*/
FLECS_API
ecs_iter_t ecs_term_chain_iter(
const ecs_iter_t *it,
ecs_term_t *term);
/** Progress a term iterator.
* This operation progresses the term iterator to the next table. The
* iterator must have been initialized with ecs_term_iter(). This operation
* must be invoked at least once before interpreting the contents of the
* iterator.
*
* @param it The iterator.
* @returns True if more data is available, false if not.
*/
FLECS_API
bool ecs_term_next(
ecs_iter_t *it);
/** Iterator for a parent's children.
* This operation is equivalent to a term iterator for (ChildOf, parent).
* Iterate the result with ecs_children_next().
*
* @param world The world.
* @param parent The parent for which to iterate the children.
* @return The iterator.
*/
FLECS_API
ecs_iter_t ecs_children(
const ecs_world_t *world,
ecs_entity_t parent);
/** Progress a children iterator.
* Equivalent to ecs_term_next().
*
* @param it The iterator.
* @returns True if more data is available, false if not.
*/
FLECS_API
bool ecs_children_next(
ecs_iter_t *it);
/** Test whether term id is set.
*
* @param id The term id.
* @return True when set, false when not set.
*/
FLECS_API
bool ecs_term_id_is_set(
const ecs_term_id_t *id);
/** Test whether a term is set.
* This operation can be used to test whether a term has been initialized with
* values or whether it is empty.
*
* An application generally does not need to invoke this operation. It is useful
* when initializing a 0-initialized array of terms (like in ecs_term_desc_t) as
* this operation can be used to find the last initialized element.
*
* @param term The term.
* @return True when set, false when not set.
*/
FLECS_API
bool ecs_term_is_initialized(
const ecs_term_t *term);
/** Is term matched on $this variable.
* This operation checks whether a term is matched on the $this variable, which
* is the default source for queries.
*
* A term has a $this source when:
* - ecs_term_t::src::id is EcsThis
* - ecs_term_t::src::flags is EcsIsVariable
*
* If ecs_term_t::src is not populated, it will be automatically initialized to
* the $this source for the created query.
*
* @param term The term.
* @return True if term matches $this, false if not.
*/
FLECS_API
bool ecs_term_match_this(
const ecs_term_t *term);
/** Is term matched on 0 source.
* This operation checks whether a term is matched on a 0 source. A 0 source is
* a term that isn't matched against anything, and can be used just to pass
* (component) ids to a query iterator.
*
* A term has a 0 source when:
* - ecs_term_t::src::id is 0
* - ecs_term_t::src::flags has EcsIsEntity set
*
* @param term The term.
* @return True if term has 0 source, false if not.
*/
FLECS_API
bool ecs_term_match_0(
const ecs_term_t *term);
/** Finalize term.
* Ensure that all fields of a term are consistent and filled out. This
* operation should be invoked before using and after assigning members to, or
* parsing a term. When a term contains unresolved identifiers, this operation
* will resolve and assign the identifiers. If the term contains any identifiers
* that cannot be resolved, the operation will fail.
*
* An application generally does not need to invoke this operation as the APIs
* that use terms (such as filters, queries and triggers) will finalize terms
* when they are created.
*
* The name and expr parameters are optional, and only used for giving more
* descriptive error messages.
*
* @param world The world.
* @param term The term to finalize.
* @return Zero if success, nonzero if an error occurred.
*/
FLECS_API
int ecs_term_finalize(
const ecs_world_t *world,
ecs_term_t *term);
/** Copy resources of a term to another term.
* This operation copies one term to another term. If the source term contains
* allocated resources (such as identifiers), they will be duplicated so that
* no memory is shared between the terms.
*
* @param src The term to copy from.
* @return The destination term.
*/
FLECS_API
ecs_term_t ecs_term_copy(
const ecs_term_t *src);
/** Move resources of a term to another term.
* Same as copy, but moves resources from src, if src->move is set to true. If
* src->move is not set to true, this operation will do a copy.
*
* The conditional move reduces redundant allocations in scenarios where a list
* of terms is partially created with allocated resources.
*
* @param src The term to move from.
* @return The destination term.
*/
FLECS_API
ecs_term_t ecs_term_move(
ecs_term_t *src);
/** Free resources of term.
* This operation frees all resources (such as identifiers) of a term. The term
* itself is not freed.
*
* @param term The term to free.
*/
FLECS_API
void ecs_term_fini(
ecs_term_t *term);
/** Initialize filter
* A filter is a lightweight object that can be used to query for entities in
* a world. Filters, as opposed to queries, do not cache results. They are
* therefore slower to iterate, but are faster to create.
*
* When a filter is copied by value, make sure to use ecs_filter_move() to
* ensure that the terms pointer still points to the inline array:
*
* @code
* ecs_filter_move(&dst_filter, &src_filter)
* @endcode
*
* Alternatively, the ecs_filter_move() function can be called with both arguments
* set to the same filter, to ensure the pointer is valid:
*
* @code
* ecs_filter_move(&f, &f)
* @endcode
*
* It is possible to create a filter without allocating any memory, by setting
* the .storage member in ecs_filter_desc_t. See the documentation for the
* member for more details.
*
* @param world The world.
* @param desc Properties for the filter to create.
* @return The filter if successful, NULL if not successful.
*/
FLECS_API
ecs_filter_t * ecs_filter_init(
ecs_world_t *world,
const ecs_filter_desc_t *desc);
/** Deinitialize filter.
* Free resources associated with filter.
*
* @param filter The filter to deinitialize.
*/
FLECS_API
void ecs_filter_fini(
ecs_filter_t *filter);
/** Finalize filter.
* When manually assigning an array of terms to the filter struct (so not when
* using ecs_filter_init()), this operation should be used to ensure that all
* terms are assigned properly and all (derived) fields have been set.
*
* When ecs_filter_init() is used to create the filter, this function should not
* be called. The purpose of this operation is to support creation of filters
* without allocating memory.
*
* @param filter The filter to finalize.
* @return Zero if filter is valid, non-zero if it contains errors.
* @
*/
FLECS_API
int ecs_filter_finalize(
const ecs_world_t *world,
ecs_filter_t *filter);
/** Find index for $this variable.
* This operation looks up the index of the $this variable. This index can
* be used in operations like ecs_iter_set_var() and ecs_iter_get_var().
*
* The operation will return -1 if the variable was not found. This happens when
* a filter only has terms that are not matched on the $this variable, like a
* filter that exclusively matches singleton components.
*
* @param filter The rule.
* @return The index of the $this variable.
*/
FLECS_API
int32_t ecs_filter_find_this_var(
const ecs_filter_t *filter);
/** Convert term to string expression.
* Convert term to a string expression. The resulting expression is equivalent
* to the same term, with the exception of And & Or operators.
*
* @param world The world.
* @param term The term.
* @return The term converted to a string.
*/
FLECS_API
char* ecs_term_str(
const ecs_world_t *world,
const ecs_term_t *term);
/** Convert filter to string expression.
* Convert filter terms to a string expression. The resulting expression can be
* parsed to create the same filter.
*
* @param world The world.
* @param filter The filter.
* @return The filter converted to a string.
*/
FLECS_API
char* ecs_filter_str(
const ecs_world_t *world,
const ecs_filter_t *filter);
/** Return a filter iterator.
* A filter iterator lets an application iterate over entities that match the
* specified filter.
*
* @param world The world.
* @param filter The filter.
* @return An iterator that can be used with ecs_filter_next().
*/
FLECS_API
ecs_iter_t ecs_filter_iter(
const ecs_world_t *world,
const ecs_filter_t *filter);
/** Return a chained filter iterator.
* A chained iterator applies a filter to the results of the input iterator. The
* resulting iterator must be iterated with ecs_filter_next().
*
* @param it The input iterator
* @param filter The filter to apply to the iterator.
* @return The chained iterator.
*/
FLECS_API
ecs_iter_t ecs_filter_chain_iter(
const ecs_iter_t *it,
const ecs_filter_t *filter);
/** Get pivot term for filter.
* The pivot term is the term that matches the smallest set of tables, and is
* a good default starting point for a search.
*
* The following conditions must be met for a term to be considered as pivot:
* - It must have a This subject
* - It must have the And operator
*
* When a filter does not have any terms that match those conditions, it will
* return -1.
*
* If one or more terms in the filter have no matching tables the filter won't
* yield any results. In this case the operation will return -2 which gives a
* search function the option to early out.
*
* @param world The world.
* @param filter The filter.
* @return Index of the pivot term (use with filter->terms)
*/
FLECS_API
int32_t ecs_filter_pivot_term(
const ecs_world_t *world,
const ecs_filter_t *filter);
/** Iterate tables matched by filter.
* This operation progresses the filter iterator to the next table. The
* iterator must have been initialized with ecs_filter_iter(). This operation
* must be invoked at least once before interpreting the contents of the
* iterator.
*
* @param it The iterator
* @return True if more data is available, false if not.
*/
FLECS_API
bool ecs_filter_next(
ecs_iter_t *it);
/** Same as ecs_filter_next, but always instanced.
* See instanced property of ecs_filter_desc_t.
*
* @param it The iterator
* @return True if more data is available, false if not.
*/
FLECS_API
bool ecs_filter_next_instanced(
ecs_iter_t *it);
/** Move resources of one filter to another.
*
* @param dst The destination filter.
* @param src The source filter.
*/
FLECS_API
void ecs_filter_move(
ecs_filter_t *dst,
ecs_filter_t *src);
/** Copy resources of one filter to another.
*
* @param dst The destination filter.
* @param src The source filter.
*/
FLECS_API
void ecs_filter_copy(
ecs_filter_t *dst,
const ecs_filter_t *src);
/** @} */
/**
* @defgroup queries Queries
* Functions for working with `ecs_query_t`.
*
* @{
*/
/** Create a query.
* This operation creates a query. Queries are used to iterate over entities
* that match a filter and are the fastest way to find and iterate over entities
* and their components.
*
* Queries should be created once, and reused multiple times. While iterating a
* query is a cheap operation, creating and deleting a query is expensive. The
* reason for this is that queries are "pre-matched", which means that a query
* stores state about which entities (or rather, tables) match with the query.
* Building up this state happens during query creation.
*
* Once a query is created, matching only happens when new tables are created.
* In most applications this is an infrequent process, since it only occurs when
* a new combination of components is introduced. While matching is expensive,
* it is important to note that matching does not happen on a per-entity basis,
* but on a per-table basis. This means that the average time spent on matching
* per frame should rapidly approach zero over the lifetime of an application.
*
* A query provides direct access to the component arrays. When an application
* creates/deletes entities or adds/removes components, these arrays can shift
* component values around, or may grow in size. This can cause unexpected or
* undefined behavior to occur if these operations are performed while
* iterating. To prevent this from happening an application should either not
* perform these operations while iterating, or use deferred operations (see
* ecs_defer_begin() and ecs_defer_end()).
*
* Queries can be created and deleted dynamically. If a query was not deleted
* (using ecs_query_fini()) before the world is deleted, it will be deleted
* automatically.
*
* @param world The world.
* @param desc A structure describing the query properties.
* @return The new query.
*/
FLECS_API
ecs_query_t* ecs_query_init(
ecs_world_t *world,
const ecs_query_desc_t *desc);
/** Destroy a query.
* This operation destroys a query and its resources. If the query is used as
* the parent of subqueries, those subqueries will be orphaned and must be
* deinitialized as well.
*
* @param query The query.
*/
FLECS_API
void ecs_query_fini(
ecs_query_t *query);
/** Get filter from a query.
* This operation obtains a pointer to the internally constructed filter
* of the query and can be used to introspect the query terms.
*
* @param query The query.
* @return The filter.
*/
FLECS_API
const ecs_filter_t* ecs_query_get_filter(
const ecs_query_t *query);
/** Return a query iterator.
* A query iterator lets an application iterate over entities that match the
* specified query. If a sorting function is specified, the query will check
* whether a resort is required upon creating the iterator.
*
* Creating a query iterator is a cheap operation that does not allocate any
* resources. An application does not need to deinitialize or free a query
* iterator before it goes out of scope.
*
* To iterate the iterator, an application should use ecs_query_next() to progress
* the iterator and test if it has data.
*
* Query iteration requires an outer and an inner loop. The outer loop uses
* ecs_query_next() to test if new tables are available. The inner loop iterates
* the entities in the table, and is usually a for loop that uses iter.count to
* loop through the entities and component arrays.
*
* The two loops are necessary because of how data is stored internally.
* Entities are grouped by the components they have, in tables. A single query
* can (and often does) match with multiple tables. Because each table has its
* own set of arrays, an application has to reobtain pointers to those arrays
* for each matching table.
*
* @param world The world or stage, when iterating in readonly mode.
* @param query The query to iterate.
* @return The query iterator.
*/
FLECS_API
ecs_iter_t ecs_query_iter(
const ecs_world_t *world,
ecs_query_t *query);
/** Progress the query iterator.
* This operation progresses the query iterator to the next table. The
* iterator must have been initialized with ecs_query_iter(). This operation
* must be invoked at least once before interpreting the contents of the
* iterator.
*
* @param iter The iterator.
* @returns True if more data is available, false if not.
*/
FLECS_API
bool ecs_query_next(
ecs_iter_t *iter);
/** Same as ecs_query_next, but always instanced.
* See "instanced" property of ecs_filter_desc_t.
*
* @param iter The iterator.
* @returns True if more data is available, false if not.
*/
FLECS_API
bool ecs_query_next_instanced(
ecs_iter_t *iter);
/** Fast alternative to ecs_query_next() that only returns matched tables.
* This operation only populates the ecs_iter_t::table field. To access the
* matched components, call ecs_query_populate().
*
* If this operation is used with a query that has inout/out terms, those terms
* will not be marked dirty unless ecs_query_populate() is called.
*
* @param iter The iterator.
* @returns True if more data is available, false if not.
*/
FLECS_API
bool ecs_query_next_table(
ecs_iter_t *iter);
/** Populate iterator fields.
* This operation can be combined with ecs_query_next_table() to populate the
* iterator fields for the current table.
*
* Populating fields conditionally can save time when a query uses change
* detection, and only needs iterator data when the table has changed. When this
* operation is called, inout/out terms will be marked dirty.
*
* In cases where inout/out terms are conditionally written and no changes
* were made after calling ecs_query_populate(), the ecs_query_skip() function can
* be called to prevent the matched table components from being marked dirty.
*
* This operation does should not be used with queries that match disabled
* components, union relationships, or with queries that use order_by.
*
* When the when_changed argument is set to true, the iterator data will only
* populate when the data has changed, using query change detection.
*
* @param iter The iterator.
* @param when_changed Only populate data when result has changed.
*/
FLECS_API
int ecs_query_populate(
ecs_iter_t *iter,
bool when_changed);
/** Returns whether the query data changed since the last iteration.
* The operation will return true after:
* - new entities have been matched with
* - new tables have been matched/unmatched with
* - matched entities were deleted
* - matched components were changed
*
* The operation will not return true after a write-only (EcsOut) or filter
* (EcsInOutNone) term has changed, when a term is not matched with the
* current table (This subject) or for tag terms.
*
* The changed state of a table is reset after it is iterated. If a iterator was
* not iterated until completion, tables may still be marked as changed.
*
* If no iterator is provided the operation will return the changed state of the
* all matched tables of the query.
*
* If an iterator is provided, the operation will return the changed state of
* the currently returned iterator result. The following preconditions must be
* met before using an iterator with change detection:
*
* - The iterator is a query iterator (created with ecs_query_iter())
* - The iterator must be valid (ecs_query_next() must have returned true)
* - The iterator must be instanced
*
* @param query The query (optional if 'it' is provided).
* @param it The iterator result to test (optional if 'query' is provided).
* @return true if entities changed, otherwise false.
*/
FLECS_API
bool ecs_query_changed(
ecs_query_t *query,
const ecs_iter_t *it);
/** Skip a table while iterating.
* This operation lets the query iterator know that a table was skipped while
* iterating. A skipped table will not reset its changed state, and the query
* will not update the dirty flags of the table for its out columns.
*
* Only valid iterators must be provided (next has to be called at least once &
* return true) and the iterator must be a query iterator.
*
* @param it The iterator result to skip.
*/
FLECS_API
void ecs_query_skip(
ecs_iter_t *it);
/** Set group to iterate for query iterator.
* This operation limits the results returned by the query to only the selected
* group id. The query must have a group_by function, and the iterator must
* be a query iterator.
*
* Groups are sets of tables that are stored together in the query cache based
* on a group id, which is calculated per table by the group_by function. To
* iterate a group, an iterator only needs to know the first and last cache node
* for that group, which can both be found in a fast O(1) operation.
*
* As a result, group iteration is one of the most efficient mechanisms to
* filter out large numbers of entities, even if those entities are distributed
* across many tables. This makes it a good fit for things like dividing up
* a world into cells, and only iterating cells close to a player.
*
* The group to iterate must be set before the first call to ecs_query_next(). No
* operations that can add/remove components should be invoked between calling
* ecs_query_set_group() and ecs_query_next().
*
* @param it The query iterator.
* @param group_id The group to iterate.
*/
FLECS_API
void ecs_query_set_group(
ecs_iter_t *it,
uint64_t group_id);
/** Get context of query group.
* This operation returns the context of a query group as returned by the
* on_group_create callback.
*
* @param query The query.
* @param group_id The group for which to obtain the context.
* @return The group context, NULL if the group doesn't exist.
*/
FLECS_API
void* ecs_query_get_group_ctx(
const ecs_query_t *query,
uint64_t group_id);
/** Get information about query group.
* This operation returns information about a query group, including the group
* context returned by the on_group_create callback.
*
* @param query The query.
* @param group_id The group for which to obtain the group info.
* @return The group info, NULL if the group doesn't exist.
*/
FLECS_API
const ecs_query_group_info_t* ecs_query_get_group_info(
const ecs_query_t *query,
uint64_t group_id);
/** Returns whether query is orphaned.
* When the parent query of a subquery is deleted, it is left in an orphaned
* state. The only valid operation on an orphaned query is deleting it. Only
* subqueries can be orphaned.
*
* @param query The query.
* @return true if query is orphaned, otherwise false.
*/
FLECS_API
bool ecs_query_orphaned(
const ecs_query_t *query);
/** Convert query to string.
*
* @param query The query.
* @return The query string.
*/
FLECS_API
char* ecs_query_str(
const ecs_query_t *query);
/** Returns number of tables query matched with.
*
* @param query The query.
* @return The number of matched tables.
*/
FLECS_API
int32_t ecs_query_table_count(
const ecs_query_t *query);
/** Returns number of empty tables query matched with.
*
* @param query The query.
* @return The number of matched empty tables.
*/
FLECS_API
int32_t ecs_query_empty_table_count(
const ecs_query_t *query);
/** Returns number of entities query matched with.
* This operation iterates all non-empty tables in the query cache to find the
* total number of entities.
*
* @param query The query.
* @return The number of matched entities.
*/
FLECS_API
int32_t ecs_query_entity_count(
const ecs_query_t *query);
/** Get query ctx.
* Return the value set in ecs_query_desc_t::ctx.
*
* @param query The query.
* @return The context.
*/
FLECS_API
void* ecs_query_get_ctx(
const ecs_query_t *query);
/** Get query binding ctx.
* Return the value set in ecs_query_desc_t::binding_ctx.
*
* @param query The query.
* @return The context.
*/
FLECS_API
void* ecs_query_get_binding_ctx(
const ecs_query_t *query);
/** @} */
/**
* @defgroup observers Observers
* Functions for working with events and observers.
*
* @{
*/
/** Send event.
* This sends an event to matching triggers & is the mechanism used by flecs
* itself to send OnAdd, OnRemove, etc events.
*
* Applications can use this function to send custom events, where a custom
* event can be any regular entity.
*
* Applications should not send builtin flecs events, as this may violate
* assumptions the code makes about the conditions under which those events are
* sent.
*
* Triggers are invoked synchronously. It is therefore safe to use stack-based
* data as event context, which can be set in the "param" member.
*
* @param world The world.
* @param desc Event parameters.
*/
FLECS_API
void ecs_emit(
ecs_world_t *world,
ecs_event_desc_t *desc);
FLECS_API
void ecs_enqueue(
ecs_world_t *world,
ecs_event_desc_t *desc);
/** Create observer.
* Observers are like triggers, but can subscribe for multiple terms. An
* observer only triggers when the source of the event meets all terms.
*
* See the documentation for ecs_observer_desc_t for more details.
*
* @param world The world.
* @param desc The observer creation parameters.
*/
FLECS_API
ecs_entity_t ecs_observer_init(
ecs_world_t *world,
const ecs_observer_desc_t *desc);
/** Default run action for observer.
* This function can be called from a custom observer run action (see
* ecs_observer_desc_t::run for more details). This function ensures that the
* observer's filter is applied to the iterator's table, filters out duplicate
* events and implements EcsMonitor logic.
*
* @param it The iterator.
* @return True if the observer was invoked.
*/
FLECS_API
bool ecs_observer_default_run_action(
ecs_iter_t *it);
/** Get observer ctx.
* Return the value set in ecs_observer_desc_t::ctx.
*
* @param world The world.
* @param observer The observer.
* @return The context.
*/
FLECS_API
void* ecs_observer_get_ctx(
const ecs_world_t *world,
ecs_entity_t observer);
/** Get observer binding ctx.
* Return the value set in ecs_observer_desc_t::binding_ctx.
*
* @param world The world.
* @param observer The observer.
* @return The context.
*/
FLECS_API
void* ecs_observer_get_binding_ctx(
const ecs_world_t *world,
ecs_entity_t observer);
/** @} */
/**
* @defgroup iterator Iterators
* Functions for working with `ecs_iter_t`.
*
* @{
*/
/** Create iterator from poly object.
* The provided poly object must have the iterable mixin. If an object is
* provided that does not have the mixin, the function will assert.
*
* When a filter is provided, an array of two iterators must be passed to the
* function. This allows the mixin implementation to create a chained iterator
* when necessary, which requires two iterator objects.
*
* If a filter is provided, the first element in the array of two iterators is
* the one that should be iterated. The mixin implementation may or may not set
* the second element, depending on whether an iterator chain is required.
*
* Additionally, when a filter is provided the returned iterator will be for a
* single term with the provided filter id. If the iterator is chained, the
* previous iterator in the chain can be accessed through it->chain_it.
*
* @param world The world or stage for which to create the iterator.
* @param poly The poly object from which to create the iterator.
* @param iter The iterator (out, ecs_iter_t[2] when filter is set).
* @param filter Optional term used for filtering the results.
*/
FLECS_API
void ecs_iter_poly(
const ecs_world_t *world,
const ecs_poly_t *poly,
ecs_iter_t *iter,
ecs_term_t *filter);
/** Progress any iterator.
* This operation is useful in combination with iterators for which it is not
* known what created them. Example use cases are functions that should accept
* any kind of iterator (such as serializers) or iterators created from poly
* objects.
*
* This operation is slightly slower than using a type-specific iterator (e.g.
* ecs_filter_next(), ecs_query_next()) as it has to call a function pointer which
* introduces a level of indirection.
*
* @param it The iterator.
* @return True if iterator has more results, false if not.
*/
FLECS_API
bool ecs_iter_next(
ecs_iter_t *it);
/** Cleanup iterator resources.
* This operation cleans up any resources associated with the iterator.
*
* This operation should only be used when an iterator is not iterated until
* completion (next has not yet returned false). When an iterator is iterated
* until completion, resources are automatically freed.
*
* @param it The iterator.
*/
FLECS_API
void ecs_iter_fini(
ecs_iter_t *it);
/** Count number of matched entities in query.
* This operation returns the number of matched entities. If a query contains no
* matched entities but still yields results (e.g. it has no terms with This
* sources) the operation will return 0.
*
* To determine the number of matched entities, the operation iterates the
* iterator until it yields no more results.
*
* @param it The iterator.
* @return True if iterator has more results, false if not.
*/
FLECS_API
int32_t ecs_iter_count(
ecs_iter_t *it);
/** Test if iterator is true.
* This operation will return true if the iterator returns at least one result.
* This is especially useful in combination with fact-checking rules (see the
* rules addon).
*
* The operation requires a valid iterator. After the operation is invoked, the
* application should no longer invoke next on the iterator and should treat it
* as if the iterator is iterated until completion.
*
* @param it The iterator.
* @return true if the iterator returns at least one result.
*/
FLECS_API
bool ecs_iter_is_true(
ecs_iter_t *it);
/** Get first matching entity from iterator.
* After this operation the application should treat the iterator as if it has
* been iterated until completion.
*
* @param it The iterator.
* @return The first matching entity, or 0 if no entities were matched.
*/
FLECS_API
ecs_entity_t ecs_iter_first(
ecs_iter_t *it);
/** Set value for iterator variable.
* This constrains the iterator to return only results for which the variable
* equals the specified value. The default value for all variables is
* EcsWildcard, which means the variable can assume any value.
*
* Example:
*
* @code
* // Rule that matches (Eats, *)
* ecs_rule_t *r = ecs_rule_init(world, &(ecs_filter_desc_t){
* .terms = {
* { .first.id = Eats, .second.name = "$food" }
* }
* });
*
* int food_var = ecs_rule_find_var(r, "food");
*
* // Set Food to Apples, so we're only matching (Eats, Apples)
* ecs_iter_t it = ecs_rule_iter(world, r);
* ecs_iter_set_var(&it, food_var, Apples);
*
* while (ecs_rule_next(&it)) {
* for (int i = 0; i < it.count; i ++) {
* // iterate as usual
* }
* }
* @endcode
*
* The variable must be initialized after creating the iterator and before the
* first call to next.
*
* @param it The iterator.
* @param var_id The variable index.
* @param entity The entity variable value.
*/
FLECS_API
void ecs_iter_set_var(
ecs_iter_t *it,
int32_t var_id,
ecs_entity_t entity);
/** Same as ecs_iter_set_var(), but for a table.
* This constrains the variable to all entities in a table.
*
* @param it The iterator.
* @param var_id The variable index.
* @param table The table variable value.
*/
FLECS_API
void ecs_iter_set_var_as_table(
ecs_iter_t *it,
int32_t var_id,
const ecs_table_t *table);
/** Same as ecs_iter_set_var(), but for a range of entities
* This constrains the variable to a range of entities in a table.
*
* @param it The iterator.
* @param var_id The variable index.
* @param range The range variable value.
*/
FLECS_API
void ecs_iter_set_var_as_range(
ecs_iter_t *it,
int32_t var_id,
const ecs_table_range_t *range);
/** Get value of iterator variable as entity.
* A variable can be interpreted as entity if it is set to an entity, or if it
* is set to a table range with count 1.
*
* This operation can only be invoked on valid iterators. The variable index
* must be smaller than the total number of variables provided by the iterator
* (as set in ecs_iter_t::variable_count).
*
* @param it The iterator.
* @param var_id The variable index.
* @return The variable value.
*/
FLECS_API
ecs_entity_t ecs_iter_get_var(
ecs_iter_t *it,
int32_t var_id);
/** Get value of iterator variable as table.
* A variable can be interpreted as table if it is set as table range with
* both offset and count set to 0, or if offset is 0 and count matches the
* number of elements in the table.
*
* This operation can only be invoked on valid iterators. The variable index
* must be smaller than the total number of variables provided by the iterator
* (as set in ecs_iter_t::variable_count).
*
* @param it The iterator.
* @param var_id The variable index.
* @return The variable value.
*/
FLECS_API
ecs_table_t* ecs_iter_get_var_as_table(
ecs_iter_t *it,
int32_t var_id);
/** Get value of iterator variable as table range.
* A value can be interpreted as table range if it is set as table range, or if
* it is set to an entity with a non-empty type (the entity must have at least
* one component, tag or relationship in its type).
*
* This operation can only be invoked on valid iterators. The variable index
* must be smaller than the total number of variables provided by the iterator
* (as set in ecs_iter_t::variable_count).
*
* @param it The iterator.
* @param var_id The variable index.
* @return The variable value.
*/
FLECS_API
ecs_table_range_t ecs_iter_get_var_as_range(
ecs_iter_t *it,
int32_t var_id);
/** Returns whether variable is constrained.
* This operation returns true for variables set by one of the ecs_iter_set_var*
* operations.
*
* A constrained variable is guaranteed not to change values while results are
* being iterated.
*
* @param it The iterator.
* @param var_id The variable index.
* @return Whether the variable is constrained to a specified value.
*/
FLECS_API
bool ecs_iter_var_is_constrained(
ecs_iter_t *it,
int32_t var_id);
/** Convert iterator to string.
* Prints the contents of an iterator to a string. Useful for debugging and/or
* testing the output of an iterator.
*
* The function only converts the currently iterated data to a string. To
* convert all data, the application has to manually call the next function and
* call ecs_iter_str() on each result.
*
* @param it The iterator.
* @return A string representing the contents of the iterator.
*/
FLECS_API
char* ecs_iter_str(
const ecs_iter_t *it);
/** Create a paged iterator.
* Paged iterators limit the results to those starting from 'offset', and will
* return at most 'limit' results.
*
* The iterator must be iterated with ecs_page_next().
*
* A paged iterator acts as a passthrough for data exposed by the parent
* iterator, so that any data provided by the parent will also be provided by
* the paged iterator.
*
* @param it The source iterator.
* @param offset The number of entities to skip.
* @param limit The maximum number of entities to iterate.
* @return A page iterator.
*/
FLECS_API
ecs_iter_t ecs_page_iter(
const ecs_iter_t *it,
int32_t offset,
int32_t limit);
/** Progress a paged iterator.
* Progresses an iterator created by ecs_page_iter().
*
* @param it The iterator.
* @return true if iterator has more results, false if not.
*/
FLECS_API
bool ecs_page_next(
ecs_iter_t *it);
/** Create a worker iterator.
* Worker iterators can be used to equally divide the number of matched entities
* across N resources (usually threads). Each resource will process the total
* number of matched entities divided by 'count'.
*
* Entities are distributed across resources such that the distribution is
* stable between queries. Two queries that match the same table are guaranteed
* to match the same entities in that table.
*
* The iterator must be iterated with ecs_worker_next().
*
* A worker iterator acts as a passthrough for data exposed by the parent
* iterator, so that any data provided by the parent will also be provided by
* the worker iterator.
*
* @param it The source iterator.
* @param index The index of the current resource.
* @param count The total number of resources to divide entities between.
* @return A worker iterator.
*/
FLECS_API
ecs_iter_t ecs_worker_iter(
const ecs_iter_t *it,
int32_t index,
int32_t count);
/** Progress a worker iterator.
* Progresses an iterator created by ecs_worker_iter().
*
* @param it The iterator.
* @return true if iterator has more results, false if not.
*/
FLECS_API
bool ecs_worker_next(
ecs_iter_t *it);
/** Obtain data for a query field.
* This operation retrieves a pointer to an array of data that belongs to the
* term in the query. The index refers to the location of the term in the query,
* and starts counting from one.
*
* For example, the query "Position, Velocity" will return the Position array
* for index 1, and the Velocity array for index 2.
*
* When the specified field is not owned by the entity this function returns a
* pointer instead of an array. This happens when the source of a field is not
* the entity being iterated, such as a shared component (from a prefab), a
* component from a parent, or another entity. The ecs_field_is_self() operation
* can be used to test dynamically if a field is owned.
*
* The provided size must be either 0 or must match the size of the datatype
* of the returned array. If the size does not match, the operation may assert.
* The size can be dynamically obtained with ecs_field_size.
*
* @param it The iterator.
* @param size The type size of the requested data.
* @param index The index of the field in the iterator.
* @return A pointer to the data of the field.
*/
FLECS_API
void* ecs_field_w_size(
const ecs_iter_t *it,
size_t size,
int32_t index);
/** Test whether the field is readonly.
* This operation returns whether the field is readonly. Readonly fields are
* annotated with [in], or are added as a const type in the C++ API.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return Whether the field is readonly.
*/
FLECS_API
bool ecs_field_is_readonly(
const ecs_iter_t *it,
int32_t index);
/** Test whether the field is writeonly.
* This operation returns whether this is a writeonly field. Writeonly terms are
* annotated with [out].
*
* Serializers are not required to serialize the values of a writeonly field.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return Whether the field is writeonly.
*/
FLECS_API
bool ecs_field_is_writeonly(
const ecs_iter_t *it,
int32_t index);
/** Test whether field is set.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return Whether the field is set.
*/
FLECS_API
bool ecs_field_is_set(
const ecs_iter_t *it,
int32_t index);
/** Return id matched for field.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return The id matched for the field.
*/
FLECS_API
ecs_id_t ecs_field_id(
const ecs_iter_t *it,
int32_t index);
/** Return index of matched table column.
* This function only returns column indices for fields that have been matched
* on the $this variable. Fields matched on other tables will return -1.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return The index of the matched column, -1 if not matched.
*/
FLECS_API
int32_t ecs_field_column_index(
const ecs_iter_t *it,
int32_t index);
/** Return field source.
* The field source is the entity on which the field was matched.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return The source for the field.
*/
FLECS_API
ecs_entity_t ecs_field_src(
const ecs_iter_t *it,
int32_t index);
/** Return field type size.
* Return type size of the field. Returns 0 if the field has no data.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return The type size for the field.
*/
FLECS_API
size_t ecs_field_size(
const ecs_iter_t *it,
int32_t index);
/** Test whether the field is matched on self.
* This operation returns whether the field is matched on the currently iterated
* entity. This function will return false when the field is owned by another
* entity, such as a parent or a prefab.
*
* When this operation returns false, the field must be accessed as a single
* value instead of an array. Fields for which this operation returns true
* return arrays with it->count values.
*
* @param it The iterator.
* @param index The index of the field in the iterator.
* @return Whether the field is matched on self.
*/
FLECS_API
bool ecs_field_is_self(
const ecs_iter_t *it,
int32_t index);
/** @} */
/**
* @defgroup tables Tables
* Functions for working with `ecs_table_t`.
*
* @{
*/
/** Get type for table.
* The table type is a vector that contains all component, tag and pair ids.
*
* @param table The table.
* @return The type of the table.
*/
FLECS_API
const ecs_type_t* ecs_table_get_type(
const ecs_table_t *table);
/** Get type index for id.
* This operation returns the index for an id in the table's type.
*
* @param world The world.
* @param table The table.
* @param id The id.
* @return The index of the id in the table type, or -1 if not found.
*/
FLECS_API
int32_t ecs_table_get_type_index(
const ecs_world_t *world,
const ecs_table_t *table,
ecs_id_t id);
/** Get column index for id.
* This operation returns the column index for an id in the table's type. If the
* id is not a component, the function will return -1.
*
* @param world The world.
* @param table The table.
* @param id The component id.
* @return The column index of the id, or -1 if not found/not a component.
*/
FLECS_API
int32_t ecs_table_get_column_index(
const ecs_world_t *world,
const ecs_table_t *table,
ecs_id_t id);
/** Return number of columns in table.
* Similar to ecs_table_get_type(table)->count, except that the column count
* only counts the number of components in a table.
*
* @param table The table.
* @return The number of columns in the table.
*/
FLECS_API
int32_t ecs_table_column_count(
const ecs_table_t *table);
/** Convert type index to column index.
* Tables have an array of columns for each component in the table. This array
* does not include elements for tags, which means that the index for a
* component in the table type is not necessarily the same as the index in the
* column array. This operation converts from an index in the table type to an
* index in the column array.
*
* @param table The table.
* @param index The index in the table type.
* @return The index in the table column array.
*/
FLECS_API
int32_t ecs_table_type_to_column_index(
const ecs_table_t *table,
int32_t index);
/** Convert column index to type index.
* Same as ecs_table_type_to_column_index(), but converts from an index in the
* column array to an index in the table type.
*
* @param table The table.
* @param index The column index.
* @return The index in the table type.
*/
FLECS_API
int32_t ecs_table_column_to_type_index(
const ecs_table_t *table,
int32_t index);
/** Get column from table by column index.
* This operation returns the component array for the provided index.
*
* @param table The table.
* @param index The column index.
* @param offset The index of the first row to return (0 for entire column).
* @return The component array, or NULL if the index is not a component.
*/
FLECS_API
void* ecs_table_get_column(
const ecs_table_t *table,
int32_t index,
int32_t offset);
/** Get column from table by component id.
* This operation returns the component array for the provided component id.
*
* @param table The table.
* @param id The component id for the column.
* @param offset The index of the first row to return (0 for entire column).
* @return The component array, or NULL if the index is not a component.
*/
FLECS_API
void* ecs_table_get_id(
const ecs_world_t *world,
const ecs_table_t *table,
ecs_id_t id,
int32_t offset);
/** Get column size from table.
* This operation returns the component size for the provided index.
*
* @param table The table.
* @param index The column index.
* @return The component size, or 0 if the index is not a component.
*/
FLECS_API
size_t ecs_table_get_column_size(
const ecs_table_t *table,
int32_t index);
/** Returns the number of records in the table.
* This operation returns the number of records that have been populated through
* the regular (entity) API as well as the number of records that have been
* inserted using the direct access API.
*
* @param table The table.
* @return The number of records in a table.
*/
FLECS_API
int32_t ecs_table_count(
const ecs_table_t *table);
/** Test if table has id.
* Same as ecs_table_get_type_index(world, table, id) != -1.
*
* @param world The world.
* @param table The table.
* @param id The id.
* @return True if the table has the id, false if the table doesn't.
*/
FLECS_API
bool ecs_table_has_id(
const ecs_world_t *world,
const ecs_table_t *table,
ecs_id_t id);
/** Return depth for table in tree for relationship rel.
* Depth is determined by counting the number of targets encountered while
* traversing up the relationship tree for rel. Only acyclic relationships are
* supported.
*
* @param world The world.
* @param table The table.
* @param rel The relationship.
* @return The depth of the table in the tree.
*/
FLECS_API
int32_t ecs_table_get_depth(
const ecs_world_t *world,
const ecs_table_t *table,
ecs_entity_t rel);
/** Get table that has all components of current table plus the specified id.
* If the provided table already has the provided id, the operation will return
* the provided table.
*
* @param world The world.
* @param table The table.
* @param id The id to add.
* @result The resulting table.
*/
FLECS_API
ecs_table_t* ecs_table_add_id(
ecs_world_t *world,
ecs_table_t *table,
ecs_id_t id);
/** Find table from id array.
* This operation finds or creates a table with the specified array of
* (component) ids. The ids in the array must be sorted, and it may not contain
* duplicate elements.
*
* @param world The world.
* @param ids The id array.
* @param id_count The number of elements in the id array.
* @return The table with the specified (component) ids.
*/
FLECS_API
ecs_table_t* ecs_table_find(
ecs_world_t *world,
const ecs_id_t *ids,
int32_t id_count);
/** Get table that has all components of current table minus the specified id.
* If the provided table doesn't have the provided id, the operation will return
* the provided table.
*
* @param world The world.
* @param table The table.
* @param id The id to remove.
* @result The resulting table.
*/
FLECS_API
ecs_table_t* ecs_table_remove_id(
ecs_world_t *world,
ecs_table_t *table,
ecs_id_t id);
/** Lock a table.
* When a table is locked, modifications to it will throw an assert. When the
* table is locked recursively, it will take an equal amount of unlock
* operations to actually unlock the table.
*
* Table locks can be used to build safe iterators where it is guaranteed that
* the contents of a table are not modified while it is being iterated.
*
* The operation only works when called on the world, and has no side effects
* when called on a stage. The assumption is that when called on a stage,
* operations are deferred already.
*
* @param world The world.
* @param table The table to lock.
*/
FLECS_API
void ecs_table_lock(
ecs_world_t *world,
ecs_table_t *table);
/** Unlock a table.
* Must be called after calling ecs_table_lock().
*
* @param world The world.
* @param table The table to unlock.
*/
FLECS_API
void ecs_table_unlock(
ecs_world_t *world,
ecs_table_t *table);
/** Test table for flags.
* Test if table has all of the provided flags. See
* include/flecs/private/api_flags.h for a list of table flags that can be used
* with this function.
*
* @param table The table.
* @param flags The flags to test for.
* @return Whether the specified flags are set for the table.
*/
FLECS_API
bool ecs_table_has_flags(
ecs_table_t *table,
ecs_flags32_t flags);
/** Swaps two elements inside the table. This is useful for implementing custom
* table sorting algorithms.
* @param world The world
* @param table The table to swap elements in
* @param row_1 Table element to swap with row_2
* @param row_2 Table element to swap with row_1
*/
FLECS_API
void ecs_table_swap_rows(
ecs_world_t* world,
ecs_table_t* table,
int32_t row_1,
int32_t row_2);
/** Commit (move) entity to a table.
* This operation moves an entity from its current table to the specified
* table. This may cause the following actions:
* - Ctor for each component in the target table
* - Move for each overlapping component
* - Dtor for each component in the source table.
* - OnAdd triggers for non-overlapping components in the target table
* - OnRemove triggers for non-overlapping components in the source table.
*
* This operation is a faster than adding/removing components individually.
*
* The application must explicitly provide the difference in components between
* tables as the added/removed parameters. This can usually be derived directly
* from the result of ecs_table_add_id() and ecs_table_remove_id(). These arrays are
* required to properly execute OnAdd/OnRemove triggers.
*
* @param world The world.
* @param entity The entity to commit.
* @param record The entity's record (optional, providing it saves a lookup).
* @param table The table to commit the entity to.
* @return True if the entity got moved, false otherwise.
*/
FLECS_API
bool ecs_commit(
ecs_world_t *world,
ecs_entity_t entity,
ecs_record_t *record,
ecs_table_t *table,
const ecs_type_t *added,
const ecs_type_t *removed);
/** Find record for entity. */
FLECS_API
ecs_record_t* ecs_record_find(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get component pointer from column/record. */
FLECS_API
void* ecs_record_get_column(
const ecs_record_t *r,
int32_t column,
size_t c_size);
/** Search for component id in table type.
* This operation returns the index of first occurrence of the id in the table
* type. The id may be a wildcard.
*
* When id_out is provided, the function will assign it with the found id. The
* found id may be different from the provided id if it is a wildcard.
*
* This is a constant time operation.
*
* @param world The world.
* @param table The table.
* @param id The id to search for.
* @param id_out If provided, it will be set to the found id (optional).
* @return The index of the id in the table type.
*/
FLECS_API
int32_t ecs_search(
const ecs_world_t *world,
const ecs_table_t *table,
ecs_id_t id,
ecs_id_t *id_out);
/** Search for component id in table type starting from an offset.
* This operation is the same as ecs_search(), but starts searching from an offset
* in the table type.
*
* This operation is typically called in a loop where the resulting index is
* used in the next iteration as offset:
*
* @code
* int32_t index = -1;
* while ((index = ecs_search_offset(world, table, offset, id, NULL))) {
* // do stuff
* }
* @endcode
*
* Depending on how the operation is used it is either linear or constant time.
* When the id has the form (id) or (rel, *) and the operation is invoked as
* in the above example, it is guaranteed to be constant time.
*
* If the provided id has the form (*, tgt) the operation takes linear time. The
* reason for this is that ids for an target are not packed together, as they
* are sorted relationship first.
*
* If the id at the offset does not match the provided id, the operation will do
* a linear search to find a matching id.
*
* @param world The world.
* @param table The table.
* @param offset Offset from where to start searching.
* @param id The id to search for.
* @param id_out If provided, it will be set to the found id (optional).
* @return The index of the id in the table type.
*/
FLECS_API
int32_t ecs_search_offset(
const ecs_world_t *world,
const ecs_table_t *table,
int32_t offset,
ecs_id_t id,
ecs_id_t *id_out);
/** Search for component/relationship id in table type starting from an offset.
* This operation is the same as ecs_search_offset(), but has the additional
* capability of traversing relationships to find a component. For example, if
* an application wants to find a component for either the provided table or a
* prefab (using the IsA relationship) of that table, it could use the operation
* like this:
*
* @code
* int32_t index = ecs_search_relation(
* world, // the world
* table, // the table
* 0, // offset 0
* ecs_id(Position), // the component id
* EcsIsA, // the relationship to traverse
* 0, // start at depth 0 (the table itself)
* 0, // no depth limit
* NULL, // (optional) entity on which component was found
* NULL, // see above
* NULL); // internal type with information about matched id
* @endcode
*
* The operation searches depth first. If a table type has 2 IsA relationships, the
* operation will first search the IsA tree of the first relationship.
*
* When choosing between ecs_search(), ecs_search_offset() and ecs_search_relation(),
* the simpler the function the better its performance.
*
* @param world The world.
* @param table The table.
* @param offset Offset from where to start searching.
* @param id The id to search for.
* @param rel The relationship to traverse (optional).
* @param flags Whether to search EcsSelf and/or EcsUp.
* @param subject_out If provided, it will be set to the matched entity.
* @param id_out If provided, it will be set to the found id (optional).
* @param tr_out Internal datatype.
* @return The index of the id in the table type.
*/
FLECS_API
int32_t ecs_search_relation(
const ecs_world_t *world,
const ecs_table_t *table,
int32_t offset,
ecs_id_t id,
ecs_entity_t rel,
ecs_flags32_t flags, /* EcsSelf and/or EcsUp */
ecs_entity_t *subject_out,
ecs_id_t *id_out,
struct ecs_table_record_t **tr_out);
/** @} */
/**
* @defgroup values Values
* Construct, destruct, copy and move dynamically created values.
*
* @{
*/
/** Construct a value in existing storage
*
* @param world The world.
* @param type The type of the value to create.
* @param ptr Pointer to a value of type 'type'
* @return Zero if success, nonzero if failed.
*/
FLECS_API
int ecs_value_init(
const ecs_world_t *world,
ecs_entity_t type,
void *ptr);
/** Construct a value in existing storage
*
* @param world The world.
* @param ti The type info of the type to create.
* @param ptr Pointer to a value of type 'type'
* @return Zero if success, nonzero if failed.
*/
FLECS_API
int ecs_value_init_w_type_info(
const ecs_world_t *world,
const ecs_type_info_t *ti,
void *ptr);
/** Construct a value in new storage
*
* @param world The world.
* @param type The type of the value to create.
* @return Pointer to type if success, NULL if failed.
*/
FLECS_API
void* ecs_value_new(
ecs_world_t *world,
ecs_entity_t type);
/** Construct a value in new storage
*
* @param world The world.
* @param ti The type info of the type to create.
* @return Pointer to type if success, NULL if failed.
*/
void* ecs_value_new_w_type_info(
ecs_world_t *world,
const ecs_type_info_t *ti);
/** Destruct a value
*
* @param world The world.
* @param ti Type info of the value to destruct.
* @param ptr Pointer to constructed value of type 'type'.
* @return Zero if success, nonzero if failed.
*/
int ecs_value_fini_w_type_info(
const ecs_world_t *world,
const ecs_type_info_t *ti,
void *ptr);
/** Destruct a value
*
* @param world The world.
* @param type The type of the value to destruct.
* @param ptr Pointer to constructed value of type 'type'.
* @return Zero if success, nonzero if failed.
*/
FLECS_API
int ecs_value_fini(
const ecs_world_t *world,
ecs_entity_t type,
void* ptr);
/** Destruct a value, free storage
*
* @param world The world.
* @param type The type of the value to destruct.
* @return Zero if success, nonzero if failed.
*/
FLECS_API
int ecs_value_free(
ecs_world_t *world,
ecs_entity_t type,
void* ptr);
/** Copy value.
*
* @param world The world.
* @param ti Type info of the value to copy.
* @param dst Pointer to the storage to copy to.
* @param src Pointer to the value to copy.
* @return Zero if success, nonzero if failed.
*/
FLECS_API
int ecs_value_copy_w_type_info(
const ecs_world_t *world,
const ecs_type_info_t *ti,
void* dst,
const void *src);
/** Copy value.
*
* @param world The world.
* @param type The type of the value to copy.
* @param dst Pointer to the storage to copy to.
* @param src Pointer to the value to copy.
* @return Zero if success, nonzero if failed.
*/
FLECS_API
int ecs_value_copy(
const ecs_world_t *world,
ecs_entity_t type,
void* dst,
const void *src);
/** Move value.
*
* @param world The world.
* @param ti Type info of the value to move.
* @param dst Pointer to the storage to move to.
* @param src Pointer to the value to move.
* @return Zero if success, nonzero if failed.
*/
int ecs_value_move_w_type_info(
const ecs_world_t *world,
const ecs_type_info_t *ti,
void* dst,
void *src);
/** Move value.
*
* @param world The world.
* @param type The type of the value to move.
* @param dst Pointer to the storage to move to.
* @param src Pointer to the value to move.
* @return Zero if success, nonzero if failed.
*/
int ecs_value_move(
const ecs_world_t *world,
ecs_entity_t type,
void* dst,
void *src);
/** Move construct value.
*
* @param world The world.
* @param ti Type info of the value to move.
* @param dst Pointer to the storage to move to.
* @param src Pointer to the value to move.
* @return Zero if success, nonzero if failed.
*/
int ecs_value_move_ctor_w_type_info(
const ecs_world_t *world,
const ecs_type_info_t *ti,
void* dst,
void *src);
/** Move construct value.
*
* @param world The world.
* @param type The type of the value to move.
* @param dst Pointer to the storage to move to.
* @param src Pointer to the value to move.
* @return Zero if success, nonzero if failed.
*/
int ecs_value_move_ctor(
const ecs_world_t *world,
ecs_entity_t type,
void* dst,
void *src);
/** @} */
/** @} */
/**
* @defgroup c_addons Addons
* @ingroup c
* C APIs for addons.
*
* @{
* @}
*/
/**
* @file addons/flecs_c.h
* @brief Extends the core API with convenience macros for C applications.
*/
#ifndef FLECS_C_
#define FLECS_C_
/**
* @defgroup flecs_c Macro API
* @ingroup c
* Convenience macro's for C API
*
* @{
*/
/**
* @defgroup flecs_c_creation Creation macro's
* Convenience macro's for creating entities, components and observers
*
* @{
*/
/* Use for declaring entity, tag, prefab / any other entity identifier */
#define ECS_DECLARE(id)\
ecs_entity_t id, ecs_id(id)
/** Forward declare an entity. */
#define ECS_ENTITY_DECLARE ECS_DECLARE
/** Define a forward declared entity.
*
* Example:
*
* @code
* ECS_ENTITY_DEFINE(world, MyEntity, Position, Velocity);
* @endcode
*/
#define ECS_ENTITY_DEFINE(world, id_, ...) \
{ \
ecs_entity_desc_t desc = {0}; \
desc.id = id_; \
desc.name = #id_; \
desc.add_expr = #__VA_ARGS__; \
id_ = ecs_entity_init(world, &desc); \
ecs_id(id_) = id_; \
ecs_assert(id_ != 0, ECS_INVALID_PARAMETER, NULL); \
} \
(void)id_; \
(void)ecs_id(id_)
/** Declare & define an entity.
*
* Example:
*
* @code
* ECS_ENTITY(world, MyEntity, Position, Velocity);
* @endcode
*/
#define ECS_ENTITY(world, id, ...) \
ecs_entity_t ecs_id(id); \
ecs_entity_t id = 0; \
ECS_ENTITY_DEFINE(world, id, __VA_ARGS__)
/** Forward declare a tag. */
#define ECS_TAG_DECLARE ECS_DECLARE
/** Define a forward declared tag.
*
* Example:
*
* @code
* ECS_TAG_DEFINE(world, MyTag);
* @endcode
*/
#define ECS_TAG_DEFINE(world, id) ECS_ENTITY_DEFINE(world, id, 0)
/** Declare & define a tag.
*
* Example:
*
* @code
* ECS_TAG(world, MyTag);
* @endcode
*/
#define ECS_TAG(world, id) ECS_ENTITY(world, id, 0)
/** Forward declare a prefab. */
#define ECS_PREFAB_DECLARE ECS_DECLARE
/** Define a forward declared prefab.
*
* Example:
*
* @code
* ECS_PREFAB_DEFINE(world, MyPrefab, Position, Velocity);
* @endcode
*/
#define ECS_PREFAB_DEFINE(world, id, ...) ECS_ENTITY_DEFINE(world, id, Prefab, __VA_ARGS__)
/** Declare & define a prefab.
*
* Example:
*
* @code
* ECS_PREFAB(world, MyPrefab, Position, Velocity);
* @endcode
*/
#define ECS_PREFAB(world, id, ...) ECS_ENTITY(world, id, Prefab, __VA_ARGS__)
/** Forward declare a component. */
#define ECS_COMPONENT_DECLARE(id) ecs_entity_t ecs_id(id)
/** Define a forward declared component.
*
* Example:
*
* @code
* ECS_COMPONENT_DEFINE(world, Position);
* @endcode
*/
#define ECS_COMPONENT_DEFINE(world, id_) \
{\
ecs_component_desc_t desc = {0}; \
ecs_entity_desc_t edesc = {0}; \
edesc.id = ecs_id(id_); \
edesc.use_low_id = true; \
edesc.name = #id_; \
edesc.symbol = #id_; \
desc.entity = ecs_entity_init(world, &edesc); \
desc.type.size = ECS_SIZEOF(id_); \
desc.type.alignment = ECS_ALIGNOF(id_); \
ecs_id(id_) = ecs_component_init(world, &desc);\
}\
ecs_assert(ecs_id(id_) != 0, ECS_INVALID_PARAMETER, NULL)
/** Declare & define a component.
*
* Example:
*
* @code
* ECS_COMPONENT(world, Position);
* @endcode
*/
#define ECS_COMPONENT(world, id)\
ecs_entity_t ecs_id(id) = 0;\
ECS_COMPONENT_DEFINE(world, id);\
(void)ecs_id(id)
/* Forward declare an observer. */
#define ECS_OBSERVER_DECLARE(id) ecs_entity_t ecs_id(id)
/** Define a forward declared observer.
*
* Example:
*
* @code
* ECS_OBSERVER_DEFINE(world, AddPosition, EcsOnAdd, Position);
* @endcode
*/
#define ECS_OBSERVER_DEFINE(world, id_, kind, ...)\
{\
ecs_observer_desc_t desc = {0};\
ecs_entity_desc_t edesc = {0}; \
edesc.id = ecs_id(id_); \
edesc.name = #id_; \
desc.entity = ecs_entity_init(world, &edesc); \
desc.callback = id_;\
desc.filter.expr = #__VA_ARGS__;\
desc.events[0] = kind;\
ecs_id(id_) = ecs_observer_init(world, &desc);\
ecs_assert(ecs_id(id_) != 0, ECS_INVALID_PARAMETER, NULL);\
}
/** Declare & define an observer.
*
* Example:
*
* @code
* ECS_OBSERVER(world, AddPosition, EcsOnAdd, Position);
* @endcode
*/
#define ECS_OBSERVER(world, id, kind, ...)\
ecs_entity_t ecs_id(id) = 0; \
ECS_OBSERVER_DEFINE(world, id, kind, __VA_ARGS__);\
ecs_entity_t id = ecs_id(id);\
(void)ecs_id(id);\
(void)id
/** Shorthand for creating an entity with ecs_entity_init().
*
* Example:
*
* @code
* ecs_entity(world, {
* .name = "MyEntity"
* });
* @endcode
*/
#define ecs_entity(world, ...)\
ecs_entity_init(world, &(ecs_entity_desc_t) __VA_ARGS__ )
/** Shorthand for creating a component with ecs_component_init().
*
* Example:
*
* @code
* ecs_component(world, {
* .type.size = 4,
* .type.alignment = 4
* });
* @endcode
*/
#define ecs_component(world, ...)\
ecs_component_init(world, &(ecs_component_desc_t) __VA_ARGS__ )
/** Shorthand for creating a component from a type.
*
* Example:
*
* @code
* ecs_component_t(world, Position);
* @endcode
*/
#define ecs_component_t(world, T)\
ecs_component_init(world, &(ecs_component_desc_t) { \
.entity = ecs_entity(world, { \
.name = #T, \
.symbol = #T, \
.use_low_id = true \
}), \
.type.size = ECS_SIZEOF(T), \
.type.alignment = ECS_ALIGNOF(T) \
})
/** Shorthand for creating a filter with ecs_filter_init().
*
* Example:
*
* @code
* ecs_filter(world, {
* .terms = {{ ecs_id(Position) }}
* });
* @endcode
*/
#define ecs_filter(world, ...)\
ecs_filter_init(world, &(ecs_filter_desc_t) __VA_ARGS__ )
/** Shorthand for creating a query with ecs_query_init().
*
* Example:
*
* @code
* ecs_query(world, {
* .filter.terms = {{ ecs_id(Position) }}
* });
* @endcode
*/
#define ecs_query(world, ...)\
ecs_query_init(world, &(ecs_query_desc_t) __VA_ARGS__ )
/** Shorthand for creating an observer with ecs_observer_init().
*
* Example:
*
* @code
* ecs_observer(world, {
* .filter.terms = {{ ecs_id(Position) }},
* .events = { EcsOnAdd },
* .callback = AddPosition
* });
* @endcode
*/
#define ecs_observer(world, ...)\
ecs_observer_init(world, &(ecs_observer_desc_t) __VA_ARGS__ )
/** @} */
/**
* @defgroup flecs_c_type_safe Type Safe API
* Macro's that wrap around core functions to provide a "type safe" API in C
*
* @{
*/
/**
* @defgroup flecs_c_entities Entity API
* @{
*/
/**
* @defgroup flecs_c_creation_deletion Creation & Deletion
* @{
*/
#define ecs_new(world, T) ecs_new_w_id(world, ecs_id(T))
#define ecs_new_w_pair(world, first, second)\
ecs_new_w_id(world, ecs_pair(first, second))
#define ecs_bulk_new(world, component, count)\
ecs_bulk_new_w_id(world, ecs_id(component), count)
#define ecs_new_entity(world, n)\
ecs_entity_init(world, &(ecs_entity_desc_t){\
.name = n,\
})
#define ecs_new_prefab(world, n)\
ecs_entity_init(world, &(ecs_entity_desc_t){\
.name = n,\
.add = {EcsPrefab}\
})
#define ecs_delete_children(world, parent)\
ecs_delete_with(world, ecs_pair(EcsChildOf, parent))
/** @} */
/**
* @defgroup flecs_c_adding_removing Adding & Removing
* @{
*/
#define ecs_add(world, entity, T)\
ecs_add_id(world, entity, ecs_id(T))
#define ecs_add_pair(world, subject, first, second)\
ecs_add_id(world, subject, ecs_pair(first, second))
#define ecs_remove(world, entity, T)\
ecs_remove_id(world, entity, ecs_id(T))
#define ecs_remove_pair(world, subject, first, second)\
ecs_remove_id(world, subject, ecs_pair(first, second))
#define ecs_override(world, entity, T)\
ecs_override_id(world, entity, ecs_id(T))
#define ecs_override_pair(world, subject, first, second)\
ecs_override_id(world, subject, ecs_pair(first, second))
/** @} */
/**
* @defgroup flecs_c_getting_setting Getting & Setting
* @{
*/
#define ecs_set_ptr(world, entity, component, ptr)\
ecs_set_id(world, entity, ecs_id(component), sizeof(component), ptr)
#define ecs_set(world, entity, component, ...)\
ecs_set_id(world, entity, ecs_id(component), sizeof(component), &(component)__VA_ARGS__)
#define ecs_set_pair(world, subject, First, second, ...)\
ecs_set_id(world, subject,\
ecs_pair(ecs_id(First), second),\
sizeof(First), &(First)__VA_ARGS__)
#define ecs_set_pair_second(world, subject, first, Second, ...)\
ecs_set_id(world, subject,\
ecs_pair(first, ecs_id(Second)),\
sizeof(Second), &(Second)__VA_ARGS__)
#define ecs_set_pair_object ecs_set_pair_second
#define ecs_set_override(world, entity, T, ...)\
ecs_add_id(world, entity, ECS_OVERRIDE | ecs_id(T));\
ecs_set(world, entity, T, __VA_ARGS__)
#define ecs_emplace(world, entity, T)\
(ECS_CAST(T*, ecs_emplace_id(world, entity, ecs_id(T))))
#define ecs_emplace_pair(world, entity, First, second)\
(ECS_CAST(First*, ecs_emplace_id(world, entity, ecs_pair_t(First, second))))
#define ecs_get(world, entity, T)\
(ECS_CAST(const T*, ecs_get_id(world, entity, ecs_id(T))))
#define ecs_get_pair(world, subject, First, second)\
(ECS_CAST(const First*, ecs_get_id(world, subject,\
ecs_pair(ecs_id(First), second))))
#define ecs_get_pair_second(world, subject, first, Second)\
(ECS_CAST(const Second*, ecs_get_id(world, subject,\
ecs_pair(first, ecs_id(Second)))))
#define ecs_get_pair_object ecs_get_pair_second
#define ecs_record_get(world, record, T)\
(ECS_CAST(const T*, ecs_record_get_id(world, record, ecs_id(T))))
#define ecs_record_has(world, record, T)\
(ecs_record_has_id(world, record, ecs_id(T)))
#define ecs_record_get_pair(world, record, First, second)\
(ECS_CAST(const First*, ecs_record_get_id(world, record, \
ecs_pair(ecs_id(First), second))))
#define ecs_record_get_pair_second(world, record, first, Second)\
(ECS_CAST(const Second*, ecs_record_get_id(world, record,\
ecs_pair(first, ecs_id(Second)))))
#define ecs_record_get_mut(world, record, T)\
(ECS_CAST(T*, ecs_record_get_mut_id(world, record, ecs_id(T))))
#define ecs_record_get_mut_pair(world, record, First, second)\
(ECS_CAST(First*, ecs_record_get_mut_id(world, record, \
ecs_pair(ecs_id(First), second))))
#define ecs_record_get_mut_pair_second(world, record, first, Second)\
(ECS_CAST(Second*, ecs_record_get_mut_id(world, record,\
ecs_pair(first, ecs_id(Second)))))
#define ecs_record_get_mut_pair_object ecs_record_get_mut_pair_second
#define ecs_ref_init(world, entity, T)\
ecs_ref_init_id(world, entity, ecs_id(T))
#define ecs_ref_get(world, ref, T)\
(ECS_CAST(const T*, ecs_ref_get_id(world, ref, ecs_id(T))))
#define ecs_get_mut(world, entity, T)\
(ECS_CAST(T*, ecs_get_mut_id(world, entity, ecs_id(T))))
#define ecs_get_mut_pair(world, subject, First, second)\
(ECS_CAST(First*, ecs_get_mut_id(world, subject,\
ecs_pair(ecs_id(First), second))))
#define ecs_get_mut_pair_second(world, subject, first, Second)\
(ECS_CAST(Second*, ecs_get_mut_id(world, subject,\
ecs_pair(first, ecs_id(Second)))))
#define ecs_get_mut_pair_object ecs_get_mut_pair_second
#define ecs_modified(world, entity, component)\
ecs_modified_id(world, entity, ecs_id(component))
#define ecs_modified_pair(world, subject, first, second)\
ecs_modified_id(world, subject, ecs_pair(first, second))
/** @} */
/**
* @defgroup flecs_c_singletons Singletons
* @{
*/
#define ecs_singleton_add(world, comp)\
ecs_add(world, ecs_id(comp), comp)
#define ecs_singleton_remove(world, comp)\
ecs_remove(world, ecs_id(comp), comp)
#define ecs_singleton_get(world, comp)\
ecs_get(world, ecs_id(comp), comp)
#define ecs_singleton_set_ptr(world, comp, ptr)\
ecs_set_ptr(world, ecs_id(comp), comp, ptr)
#define ecs_singleton_set(world, comp, ...)\
ecs_set(world, ecs_id(comp), comp, __VA_ARGS__)
#define ecs_singleton_get_mut(world, comp)\
ecs_get_mut(world, ecs_id(comp), comp)
#define ecs_singleton_modified(world, comp)\
ecs_modified(world, ecs_id(comp), comp)
/** @} */
/**
* @defgroup flecs_c_has Has, Owns, Shares
* @{
*/
#define ecs_has(world, entity, T)\
ecs_has_id(world, entity, ecs_id(T))
#define ecs_has_pair(world, entity, first, second)\
ecs_has_id(world, entity, ecs_pair(first, second))
#define ecs_owns_pair(world, entity, first, second)\
ecs_owns_id(world, entity, ecs_pair(first, second))
#define ecs_owns(world, entity, T)\
ecs_owns_id(world, entity, ecs_id(T))
#define ecs_shares_id(world, entity, id)\
(ecs_search_relation(world, ecs_get_table(world, entity), 0, ecs_id(id), \
EcsIsA, 1, 0, 0, 0, 0) != -1)
#define ecs_shares_pair(world, entity, first, second)\
(ecs_shares_id(world, entity, ecs_pair(first, second)))
#define ecs_shares(world, entity, T)\
(ecs_shares_id(world, entity, ecs_id(T)))
/** @} */
/**
* @defgroup flecs_c_enable_disable Enabling & Disabling
* @{
*/
#define ecs_enable_component(world, entity, T, enable)\
ecs_enable_id(world, entity, ecs_id(T), enable)
#define ecs_is_enabled_component(world, entity, T)\
ecs_is_enabled_id(world, entity, ecs_id(T))
#define ecs_enable_pair(world, entity, First, second, enable)\
ecs_enable_id(world, entity, ecs_pair(ecs_id(First), second), enable)
#define ecs_is_enabled_pair(world, entity, First, second)\
ecs_is_enabled_id(world, entity, ecs_pair(ecs_id(First), second))
/** @} */
/**
* @defgroup flecs_c_entity_names Entity Names
* @{
*/
#define ecs_lookup_path(world, parent, path)\
ecs_lookup_path_w_sep(world, parent, path, ".", NULL, true)
#define ecs_lookup_fullpath(world, path)\
ecs_lookup_path_w_sep(world, 0, path, ".", NULL, true)
#define ecs_get_path(world, parent, child)\
ecs_get_path_w_sep(world, parent, child, ".", NULL)
#define ecs_get_fullpath(world, child)\
ecs_get_path_w_sep(world, 0, child, ".", NULL)
#define ecs_get_fullpath_buf(world, child, buf)\
ecs_get_path_w_sep_buf(world, 0, child, ".", NULL, buf)
#define ecs_new_from_path(world, parent, path)\
ecs_new_from_path_w_sep(world, parent, path, ".", NULL)
#define ecs_new_from_fullpath(world, path)\
ecs_new_from_path_w_sep(world, 0, path, ".", NULL)
#define ecs_add_path(world, entity, parent, path)\
ecs_add_path_w_sep(world, entity, parent, path, ".", NULL)
#define ecs_add_fullpath(world, entity, path)\
ecs_add_path_w_sep(world, entity, 0, path, ".", NULL)
/** @} */
/** @} */
/**
* @defgroup flecs_c_components Component API
* @{
*/
#define ecs_set_hooks(world, T, ...)\
ecs_set_hooks_id(world, ecs_id(T), &(ecs_type_hooks_t)__VA_ARGS__)
#define ecs_get_hooks(world, T)\
ecs_get_hooks_id(world, ecs_id(T));
/** Declare a constructor.
* Example:
*
* @code
* ECS_CTOR(MyType, ptr, { ptr->value = NULL; });
* @endcode
*/
#define ECS_CTOR(type, var, ...)\
ECS_XTOR_IMPL(type, ctor, var, __VA_ARGS__)
/** Declare a destructor.
* Example:
*
* @code
* ECS_DTOR(MyType, ptr, { free(ptr->value); });
* @endcode
*/
#define ECS_DTOR(type, var, ...)\
ECS_XTOR_IMPL(type, dtor, var, __VA_ARGS__)
/** Declare a copy action.
* Example:
*
* @code
* ECS_COPY(MyType, dst, src, { dst->value = strdup(src->value); });
* @endcode
*/
#define ECS_COPY(type, dst_var, src_var, ...)\
ECS_COPY_IMPL(type, dst_var, src_var, __VA_ARGS__)
/** Declare a move action.
* Example:
*
* @code
* ECS_MOVE(MyType, dst, src, { dst->value = src->value; src->value = 0; });
* @endcode
*/
#define ECS_MOVE(type, dst_var, src_var, ...)\
ECS_MOVE_IMPL(type, dst_var, src_var, __VA_ARGS__)
/** Declare component hooks.
* Example:
*
* @code
* ECS_ON_SET(MyType, ptr, { printf("%d\n", ptr->value); });
* @endcode
*/
#define ECS_ON_ADD(type, ptr, ...)\
ECS_HOOK_IMPL(type, ecs_on_add(type), ptr, __VA_ARGS__)
#define ECS_ON_REMOVE(type, ptr, ...)\
ECS_HOOK_IMPL(type, ecs_on_remove(type), ptr, __VA_ARGS__)
#define ECS_ON_SET(type, ptr, ...)\
ECS_HOOK_IMPL(type, ecs_on_set(type), ptr, __VA_ARGS__)
/* Map from typename to function name of component lifecycle action */
#define ecs_ctor(type) type##_ctor
#define ecs_dtor(type) type##_dtor
#define ecs_copy(type) type##_copy
#define ecs_move(type) type##_move
#define ecs_on_set(type) type##_on_set
#define ecs_on_add(type) type##_on_add
#define ecs_on_remove(type) type##_on_remove
/** @} */
/**
* @defgroup flecs_c_ids Id API
* @{
*/
#define ecs_count(world, type)\
ecs_count_id(world, ecs_id(type))
/** @} */
/**
* @defgroup flecs_c_iterators Iterator API
* @{
*/
#define ecs_field(it, T, index)\
(ECS_CAST(T*, ecs_field_w_size(it, sizeof(T), index)))
/** @} */
/**
* @defgroup flecs_c_tables Table API
* @{
*/
#define ecs_table_get(world, table, T, offset)\
(ECS_CAST(T*, ecs_table_get_id(world, table, ecs_id(T), offset)))
#define ecs_table_get_pair(world, table, First, second, offset)\
(ECS_CAST(First*, ecs_table_get_id(world, table, ecs_pair(ecs_id(First), second), offset)))
#define ecs_table_get_pair_second(world, table, first, Second, offset)\
(ECS_CAST(Second*, ecs_table_get_id(world, table, ecs_pair(first, ecs_id(Second)), offset)))
/** @} */
/**
* @defgroup flecs_c_values Value API
* @{
*/
#define ecs_value(T, ptr) ((ecs_value_t){ecs_id(T), ptr})
#define ecs_value_new_t(world, T) ecs_value_new(world, ecs_id(T))
/** @} */
/** @} */
/**
* @defgroup flecs_c_table_sorting Table sorting
* Convenience macro's for sorting tables.
*
* @{
*/
#define ecs_sort_table(id) ecs_id(id##_sort_table)
#define ecs_compare(id) ecs_id(id##_compare_fn)
/* Declare efficient table sorting operation that uses provided compare function.
* For best results use LTO or make the function body visible in the same compilation unit.
* Variadic arguments are prepended before generated functions, use it to declare static
* or exported functions.
* Parameters of the comparison function:
* ecs_entity_t e1, const void* ptr1,
* ecs_entity_t e2, const void* ptr2
* Parameters of the sort functions:
* ecs_world_t *world
* ecs_table_t *table
* ecs_entity_t *entities
* void *ptr
* int32_t elem_size
* int32_t lo
* int32_t hi
* ecs_order_by_action_t order_by - Pointer to the original comparison function. You are not supposed to use it.
* Example:
*
* @code
* int CompareMyType(ecs_entity_t e1, const void* ptr1, ecs_entity_t e2, const void* ptr2) { const MyType* p1 = ptr1; const MyType* p2 = ptr2; return p1->value - p2->value; }
* ECS_SORT_TABLE_WITH_COMPARE(MyType, MyCustomCompare, CompareMyType)
* @endcode
*/
#define ECS_SORT_TABLE_WITH_COMPARE(id, op_name, compare_fn, ...) \
static int32_t ECS_CONCAT(op_name, _partition)( \
ecs_world_t *world, \
ecs_table_t *table, \
ecs_entity_t *entities, \
void *ptr, \
int32_t elem_size, \
int32_t lo, \
int32_t hi, \
ecs_order_by_action_t order_by) \
{ \
(void)(order_by); \
int32_t p = (hi + lo) / 2; \
void *pivot = ECS_ELEM(ptr, elem_size, p); \
ecs_entity_t pivot_e = entities[p]; \
int32_t i = lo - 1, j = hi + 1; \
void *el; \
repeat: \
{ \
do { \
i ++; \
el = ECS_ELEM(ptr, elem_size, i); \
} while ( compare_fn(entities[i], el, pivot_e, pivot) < 0); \
do { \
j --; \
el = ECS_ELEM(ptr, elem_size, j); \
} while ( compare_fn(entities[j], el, pivot_e, pivot) > 0); \
if (i >= j) { \
return j; \
} \
ecs_table_swap_rows(world, table, i, j); \
if (p == i) { \
pivot = ECS_ELEM(ptr, elem_size, j); \
pivot_e = entities[j]; \
} else if (p == j) { \
pivot = ECS_ELEM(ptr, elem_size, i); \
pivot_e = entities[i]; \
} \
goto repeat; \
} \
} \
__VA_ARGS__ void op_name( \
ecs_world_t *world, \
ecs_table_t *table, \
ecs_entity_t *entities, \
void *ptr, \
int32_t size, \
int32_t lo, \
int32_t hi, \
ecs_order_by_action_t order_by) \
{ \
if ((hi - lo) < 1) { \
return; \
} \
int32_t p = ECS_CONCAT(op_name, _partition)(world, table, entities, ptr, size, lo, hi, order_by); \
op_name(world, table, entities, ptr, size, lo, p, order_by); \
op_name(world, table, entities, ptr, size, p + 1, hi, order_by); \
}
/* Declare efficient table sorting operation that uses default component comparison operator.
* For best results use LTO or make the comparison operator visible in the same compilation unit.
* Variadic arguments are prepended before generated functions, use it to declare static
* or exported functions.
* Example:
*
* @code
* ECS_COMPARE(MyType, { const MyType* p1 = ptr1; const MyType* p2 = ptr2; return p1->value - p2->value; });
* ECS_SORT_TABLE(MyType)
* @endcode
*/
#define ECS_SORT_TABLE(id, ...) \
ECS_SORT_TABLE_WITH_COMPARE(id, ecs_sort_table(id), ecs_compare(id), __VA_ARGS__)
/* Declare component comparison operations.
* Parameters:
* ecs_entity_t e1, const void* ptr1,
* ecs_entity_t e2, const void* ptr2
* Example:
*
* @code
* ECS_COMPARE(MyType, { const MyType* p1 = ptr1; const MyType* p2 = ptr2; return p1->value - p2->value; });
* @endcode
*/
#define ECS_COMPARE(id, ...) \
int ecs_compare(id)(ecs_entity_t e1, const void* ptr1, ecs_entity_t e2, const void* ptr2) { \
__VA_ARGS__ \
}
/** @} */
/**
* @defgroup flecs_c_misc Misc
* Misc convenience macro's.
*
* @{
*/
#define ecs_isa(e) ecs_pair(EcsIsA, e)
#define ecs_childof(e) ecs_pair(EcsChildOf, e)
#define ecs_dependson(e) ecs_pair(EcsDependsOn, e)
#define ecs_query_new(world, q_expr)\
ecs_query_init(world, &(ecs_query_desc_t){\
.filter.expr = q_expr\
})
#define ecs_rule_new(world, q_expr)\
ecs_rule_init(world, &(ecs_filter_desc_t){\
.expr = q_expr\
})
/** @} */
/** @} */
#endif // FLECS_C_
#ifdef __cplusplus
}
#endif
/**
* @file addons.h
* @brief Include enabled addons.
*
* This file should only be included by the main flecs.h header.
*/
#ifndef FLECS_ADDONS_H
#define FLECS_ADDONS_H
/* Blacklist macros */
#ifdef FLECS_NO_CPP
#undef FLECS_CPP
#endif
#ifdef FLECS_NO_MODULE
#undef FLECS_MODULE
#endif
#ifdef FLECS_NO_PARSER
#undef FLECS_PARSER
#endif
#ifdef FLECS_NO_PLECS
#undef FLECS_PLECS
#endif
#ifdef FLECS_NO_RULES
#undef FLECS_RULES
#endif
#ifdef FLECS_NO_SNAPSHOT
#undef FLECS_SNAPSHOT
#endif
#ifdef FLECS_NO_MONITOR
#undef FLECS_MONITOR
#endif
#ifdef FLECS_NO_STATS
#undef FLECS_STATS
#endif
#ifdef FLECS_NO_SYSTEM
#undef FLECS_SYSTEM
#endif
#ifdef FLECS_NO_PIPELINE
#undef FLECS_PIPELINE
#endif
#ifdef FLECS_NO_TIMER
#undef FLECS_TIMER
#endif
#ifdef FLECS_NO_META
#undef FLECS_META
#endif
#ifdef FLECS_NO_META_C
#undef FLECS_META_C
#endif
#ifdef FLECS_NO_UNITS
#undef FLECS_UNITS
#endif
#ifdef FLECS_NO_EXPR
#undef FLECS_EXPR
#endif
#ifdef FLECS_NO_JSON
#undef FLECS_JSON
#endif
#ifdef FLECS_NO_DOC
#undef FLECS_DOC
#endif
#ifdef FLECS_NO_COREDOC
#undef FLECS_COREDOC
#endif
#ifdef FLECS_NO_LOG
#undef FLECS_LOG
#endif
#ifdef FLECS_NO_APP
#undef FLECS_APP
#endif
#ifdef FLECS_NO_OS_API_IMPL
#undef FLECS_OS_API_IMPL
#endif
#ifdef FLECS_NO_HTTP
#undef FLECS_HTTP
#endif
#ifdef FLECS_NO_REST
#undef FLECS_REST
#endif
#ifdef FLECS_NO_JOURNAL
#undef FLECS_JOURNAL
#endif
/* Always included, if disabled functions are replaced with dummy macros */
/**
* @file addons/journal.h
* @brief Journaling addon that logs API functions.
*
* The journaling addon traces API calls. The trace is formatted as runnable
* C code, which allows for (partially) reproducing the behavior of an app
* with the journaling trace.
*
* The journaling addon is disabled by default. Enabling it can have a
* significant impact on performance.
*/
#ifdef FLECS_JOURNAL
#ifndef FLECS_LOG
#define FLECS_LOG
#endif
#ifndef FLECS_JOURNAL_H
#define FLECS_JOURNAL_H
/**
* @defgroup c_addons_journal Journal
* @ingroup c_addons
* Journaling addon (disabled by default).
*
*
* @{
*/
/* Trace when log level is at or higher than level */
#define FLECS_JOURNAL_LOG_LEVEL (0)
#ifdef __cplusplus
extern "C" {
#endif
/* Journaling API, meant to be used by internals. */
typedef enum ecs_journal_kind_t {
EcsJournalNew,
EcsJournalMove,
EcsJournalClear,
EcsJournalDelete,
EcsJournalDeleteWith,
EcsJournalRemoveAll,
EcsJournalTableEvents
} ecs_journal_kind_t;
FLECS_DBG_API
void flecs_journal_begin(
ecs_world_t *world,
ecs_journal_kind_t kind,
ecs_entity_t entity,
ecs_type_t *add,
ecs_type_t *remove);
FLECS_DBG_API
void flecs_journal_end(void);
#define flecs_journal(...)\
flecs_journal_begin(__VA_ARGS__);\
flecs_journal_end();
#ifdef __cplusplus
}
#endif // __cplusplus
/** @} */
#endif // FLECS_JOURNAL_H
#else
#define flecs_journal_begin(...)
#define flecs_journal_end(...)
#define flecs_journal(...)
#endif // FLECS_JOURNAL
/**
* @file addons/log.h
* @brief Logging addon.
*
* The logging addon provides an API for (debug) tracing and reporting errors
* at various levels. When enabled, the logging addon can provide more detailed
* information about the state of the ECS and any errors that may occur.
*
* The logging addon can be disabled to reduce footprint of the library, but
* limits information logged to only file, line and error code.
*
* When enabled the logging addon can be configured to exclude levels of tracing
* from the build to reduce the impact on performance. By default all debug
* tracing is enabled for debug builds, tracing is enabled at release builds.
*
* Applications can change the logging level at runtime with ecs_log_set_level(),
* but what is actually logged depends on what is compiled (when compiled
* without debug tracing, setting the runtime level to debug won't have an
* effect).
*
* The logging addon uses the OS API log_ function for all tracing.
*
* Note that even when the logging addon is not enabled, its header/source must
* be included in a build. To prevent unused variable warnings in the code, some
* API functions are included when the addon is disabled, but have empty bodies.
*/
#ifndef FLECS_LOG_H
#define FLECS_LOG_H
#ifdef __cplusplus
extern "C" {
#endif
#ifdef FLECS_LOG
/**
* @defgroup c_addons_log Log
* @ingroup c_addons
* Logging functions.
*
* @{
*/
////////////////////////////////////////////////////////////////////////////////
//// Tracing
////////////////////////////////////////////////////////////////////////////////
FLECS_API
void ecs_deprecated_(
const char *file,
int32_t line,
const char *msg);
/** Increase log stack.
* This operation increases the indent_ value of the OS API and can be useful to
* make nested behavior more visible.
*
* @param level The log level.
*/
FLECS_API
void ecs_log_push_(int32_t level);
/** Decrease log stack.
* This operation decreases the indent_ value of the OS API and can be useful to
* make nested behavior more visible.
*
* @param level The log level.
*/
FLECS_API
void ecs_log_pop_(int32_t level);
/** Should current level be logged.
* This operation returns true when the specified log level should be logged
* with the current log level.
*
* @param level The log level to check for.
* @return Whether logging is enabled for the current level.
*/
FLECS_API
bool ecs_should_log(int32_t level);
////////////////////////////////////////////////////////////////////////////////
//// Error reporting
////////////////////////////////////////////////////////////////////////////////
/** Get description for error code */
FLECS_API
const char* ecs_strerror(
int32_t error_code);
#else // FLECS_LOG
////////////////////////////////////////////////////////////////////////////////
//// Dummy macros for when logging is disabled
////////////////////////////////////////////////////////////////////////////////
#define ecs_deprecated_(file, line, msg)\
(void)file;\
(void)line;\
(void)msg
#define ecs_log_push_(level)
#define ecs_log_pop_(level)
#define ecs_should_log(level) false
#define ecs_strerror(error_code)\
(void)error_code
#endif // FLECS_LOG
////////////////////////////////////////////////////////////////////////////////
//// Logging functions (do nothing when logging is enabled)
////////////////////////////////////////////////////////////////////////////////
FLECS_API
void ecs_print_(
int32_t level,
const char *file,
int32_t line,
const char *fmt,
...);
FLECS_API
void ecs_printv_(
int level,
const char *file,
int32_t line,
const char *fmt,
va_list args);
FLECS_API
void ecs_log_(
int32_t level,
const char *file,
int32_t line,
const char *fmt,
...);
FLECS_API
void ecs_logv_(
int level,
const char *file,
int32_t line,
const char *fmt,
va_list args);
FLECS_API
void ecs_abort_(
int32_t error_code,
const char *file,
int32_t line,
const char *fmt,
...);
FLECS_API
void ecs_assert_log_(
int32_t error_code,
const char *condition_str,
const char *file,
int32_t line,
const char *fmt,
...);
FLECS_API
void ecs_parser_error_(
const char *name,
const char *expr,
int64_t column,
const char *fmt,
...);
FLECS_API
void ecs_parser_errorv_(
const char *name,
const char *expr,
int64_t column,
const char *fmt,
va_list args);
////////////////////////////////////////////////////////////////////////////////
//// Logging macros
////////////////////////////////////////////////////////////////////////////////
#ifndef FLECS_LEGACY /* C89 doesn't support variadic macros */
/* Base logging function. Accepts a custom level */
#define ecs_print(level, ...)\
ecs_print_(level, __FILE__, __LINE__, __VA_ARGS__)
#define ecs_printv(level, fmt, args)\
ecs_printv_(level, __FILE__, __LINE__, fmt, args)
#define ecs_log(level, ...)\
ecs_log_(level, __FILE__, __LINE__, __VA_ARGS__)
#define ecs_logv(level, fmt, args)\
ecs_logv_(level, __FILE__, __LINE__, fmt, args)
/* Tracing. Used for logging of infrequent events */
#define ecs_trace_(file, line, ...) ecs_log_(0, file, line, __VA_ARGS__)
#define ecs_trace(...) ecs_trace_(__FILE__, __LINE__, __VA_ARGS__)
/* Warning. Used when an issue occurs, but operation is successful */
#define ecs_warn_(file, line, ...) ecs_log_(-2, file, line, __VA_ARGS__)
#define ecs_warn(...) ecs_warn_(__FILE__, __LINE__, __VA_ARGS__)
/* Error. Used when an issue occurs, and operation failed. */
#define ecs_err_(file, line, ...) ecs_log_(-3, file, line, __VA_ARGS__)
#define ecs_err(...) ecs_err_(__FILE__, __LINE__, __VA_ARGS__)
/* Fatal. Used when an issue occurs, and the application cannot continue. */
#define ecs_fatal_(file, line, ...) ecs_log_(-4, file, line, __VA_ARGS__)
#define ecs_fatal(...) ecs_fatal_(__FILE__, __LINE__, __VA_ARGS__)
/* Optionally include warnings about using deprecated features */
#ifndef FLECS_NO_DEPRECATED_WARNINGS
#define ecs_deprecated(...)\
ecs_deprecated_(__FILE__, __LINE__, __VA_ARGS__)
#else
#define ecs_deprecated(...)
#endif // FLECS_NO_DEPRECATED_WARNINGS
/* If no tracing verbosity is defined, pick default based on build config */
#if !(defined(FLECS_LOG_0) || defined(FLECS_LOG_1) || defined(FLECS_LOG_2) || defined(FLECS_LOG_3))
#if !defined(FLECS_NDEBUG)
#define FLECS_LOG_3 /* Enable all tracing in debug mode. May slow things down */
#else
#define FLECS_LOG_0 /* Only enable infrequent tracing in release mode */
#endif // !defined(FLECS_NDEBUG)
#endif // !(defined(FLECS_LOG_0) || defined(FLECS_LOG_1) || defined(FLECS_LOG_2) || defined(FLECS_LOG_3))
/* Define/undefine macros based on compiled-in tracing level. This can optimize
* out tracing statements from a build, which improves performance. */
#if defined(FLECS_LOG_3) /* All debug tracing enabled */
#define ecs_dbg_1(...) ecs_log(1, __VA_ARGS__);
#define ecs_dbg_2(...) ecs_log(2, __VA_ARGS__);
#define ecs_dbg_3(...) ecs_log(3, __VA_ARGS__);
#define ecs_log_push_1() ecs_log_push_(1);
#define ecs_log_push_2() ecs_log_push_(2);
#define ecs_log_push_3() ecs_log_push_(3);
#define ecs_log_pop_1() ecs_log_pop_(1);
#define ecs_log_pop_2() ecs_log_pop_(2);
#define ecs_log_pop_3() ecs_log_pop_(3);
#define ecs_should_log_1() ecs_should_log(1)
#define ecs_should_log_2() ecs_should_log(2)
#define ecs_should_log_3() ecs_should_log(3)
#define FLECS_LOG_2
#define FLECS_LOG_1
#define FLECS_LOG_0
#elif defined(FLECS_LOG_2) /* Level 2 and below debug tracing enabled */
#define ecs_dbg_1(...) ecs_log(1, __VA_ARGS__);
#define ecs_dbg_2(...) ecs_log(2, __VA_ARGS__);
#define ecs_dbg_3(...)
#define ecs_log_push_1() ecs_log_push_(1);
#define ecs_log_push_2() ecs_log_push_(2);
#define ecs_log_push_3()
#define ecs_log_pop_1() ecs_log_pop_(1);
#define ecs_log_pop_2() ecs_log_pop_(2);
#define ecs_log_pop_3()
#define ecs_should_log_1() ecs_should_log(1)
#define ecs_should_log_2() ecs_should_log(2)
#define ecs_should_log_3() false
#define FLECS_LOG_1
#define FLECS_LOG_0
#elif defined(FLECS_LOG_1) /* Level 1 debug tracing enabled */
#define ecs_dbg_1(...) ecs_log(1, __VA_ARGS__);
#define ecs_dbg_2(...)
#define ecs_dbg_3(...)
#define ecs_log_push_1() ecs_log_push_(1);
#define ecs_log_push_2()
#define ecs_log_push_3()
#define ecs_log_pop_1() ecs_log_pop_(1);
#define ecs_log_pop_2()
#define ecs_log_pop_3()
#define ecs_should_log_1() ecs_should_log(1)
#define ecs_should_log_2() false
#define ecs_should_log_3() false
#define FLECS_LOG_0
#elif defined(FLECS_LOG_0) /* No debug tracing enabled */
#define ecs_dbg_1(...)
#define ecs_dbg_2(...)
#define ecs_dbg_3(...)
#define ecs_log_push_1()
#define ecs_log_push_2()
#define ecs_log_push_3()
#define ecs_log_pop_1()
#define ecs_log_pop_2()
#define ecs_log_pop_3()
#define ecs_should_log_1() false
#define ecs_should_log_2() false
#define ecs_should_log_3() false
#else /* No tracing enabled */
#undef ecs_trace
#define ecs_trace(...)
#define ecs_dbg_1(...)
#define ecs_dbg_2(...)
#define ecs_dbg_3(...)
#define ecs_log_push_1()
#define ecs_log_push_2()
#define ecs_log_push_3()
#define ecs_log_pop_1()
#define ecs_log_pop_2()
#define ecs_log_pop_3()
#endif // defined(FLECS_LOG_3)
/* Default debug tracing is at level 1 */
#define ecs_dbg ecs_dbg_1
/* Default level for push/pop is 0 */
#define ecs_log_push() ecs_log_push_(0)
#define ecs_log_pop() ecs_log_pop_(0)
/** Abort.
* Unconditionally aborts process. */
#define ecs_abort(error_code, ...)\
ecs_abort_(error_code, __FILE__, __LINE__, __VA_ARGS__);\
ecs_os_abort(); abort(); /* satisfy compiler/static analyzers */
/** Assert.
* Aborts if condition is false, disabled in debug mode. */
#if defined(FLECS_NDEBUG) && !defined(FLECS_KEEP_ASSERT)
#define ecs_assert(condition, error_code, ...)
#else
#define ecs_assert(condition, error_code, ...)\
if (!(condition)) {\
ecs_assert_log_(error_code, #condition, __FILE__, __LINE__, __VA_ARGS__);\
ecs_os_abort();\
}\
assert(condition) /* satisfy compiler/static analyzers */
#endif // FLECS_NDEBUG
#define ecs_assert_var(var, error_code, ...)\
ecs_assert(var, error_code, __VA_ARGS__);\
(void)var
/** Debug assert.
* Assert that is only valid in debug mode (ignores FLECS_KEEP_ASSERT) */
#ifndef FLECS_NDEBUG
#define ecs_dbg_assert(condition, error_code, ...) ecs_assert(condition, error_code, __VA_ARGS__)
#else
#define ecs_dbg_assert(condition, error_code, ...)
#endif
/** Sanitize assert.
* Assert that is only valid in sanitized mode (ignores FLECS_KEEP_ASSERT) */
#ifdef FLECS_SANITIZE
#define ecs_san_assert(condition, error_code, ...) ecs_assert(condition, error_code, __VA_ARGS__)
#else
#define ecs_san_assert(condition, error_code, ...)
#endif
/* Silence dead code/unused label warnings when compiling without checks. */
#define ecs_dummy_check\
if ((false)) {\
goto error;\
}
/** Check.
* goto error if condition is false. */
#if defined(FLECS_NDEBUG) && !defined(FLECS_KEEP_ASSERT)
#define ecs_check(condition, error_code, ...) ecs_dummy_check
#else
#ifdef FLECS_SOFT_ASSERT
#define ecs_check(condition, error_code, ...)\
if (!(condition)) {\
ecs_assert_log_(error_code, #condition, __FILE__, __LINE__, __VA_ARGS__);\
goto error;\
}
#else // FLECS_SOFT_ASSERT
#define ecs_check(condition, error_code, ...)\
ecs_assert(condition, error_code, __VA_ARGS__);\
ecs_dummy_check
#endif
#endif // FLECS_NDEBUG
/** Panic.
* goto error when FLECS_SOFT_ASSERT is defined, otherwise abort */
#if defined(FLECS_NDEBUG) && !defined(FLECS_KEEP_ASSERT)
#define ecs_throw(error_code, ...) ecs_dummy_check
#else
#ifdef FLECS_SOFT_ASSERT
#define ecs_throw(error_code, ...)\
ecs_abort_(error_code, __FILE__, __LINE__, __VA_ARGS__);\
goto error;
#else
#define ecs_throw(error_code, ...)\
ecs_abort(error_code, __VA_ARGS__);\
ecs_dummy_check
#endif
#endif // FLECS_NDEBUG
/** Parser error */
#define ecs_parser_error(name, expr, column, ...)\
ecs_parser_error_(name, expr, column, __VA_ARGS__)
#define ecs_parser_errorv(name, expr, column, fmt, args)\
ecs_parser_errorv_(name, expr, column, fmt, args)
#endif // FLECS_LEGACY
////////////////////////////////////////////////////////////////////////////////
//// Functions that are always available
////////////////////////////////////////////////////////////////////////////////
/** Enable or disable log.
* This will enable builtin log. For log to work, it will have to be
* compiled in which requires defining one of the following macros:
*
* FLECS_LOG_0 - All log is disabled
* FLECS_LOG_1 - Enable log level 1
* FLECS_LOG_2 - Enable log level 2 and below
* FLECS_LOG_3 - Enable log level 3 and below
*
* If no log level is defined and this is a debug build, FLECS_LOG_3 will
* have been automatically defined.
*
* The provided level corresponds with the log level. If -1 is provided as
* value, warnings are disabled. If -2 is provided, errors are disabled as well.
*
* @param level Desired tracing level.
* @return Previous log level.
*/
FLECS_API
int ecs_log_set_level(
int level);
/** Get current log level.
*
* @return Previous log level.
*/
FLECS_API
int ecs_log_get_level(void);
/** Enable/disable tracing with colors.
* By default colors are enabled.
*
* @param enabled Whether to enable tracing with colors.
* @return Previous color setting.
*/
FLECS_API
bool ecs_log_enable_colors(
bool enabled);
/** Enable/disable logging timestamp.
* By default timestamps are disabled. Note that enabling timestamps introduces
* overhead as the logging code will need to obtain the current time.
*
* @param enabled Whether to enable tracing with timestamps.
* @return Previous timestamp setting.
*/
FLECS_API
bool ecs_log_enable_timestamp(
bool enabled);
/** Enable/disable logging time since last log.
* By default deltatime is disabled. Note that enabling timestamps introduces
* overhead as the logging code will need to obtain the current time.
*
* When enabled, this logs the amount of time in seconds passed since the last
* log, when this amount is non-zero. The format is a '+' character followed by
* the number of seconds:
*
* +1 trace: log message
*
* @param enabled Whether to enable tracing with timestamps.
* @return Previous timestamp setting.
*/
FLECS_API
bool ecs_log_enable_timedelta(
bool enabled);
/** Get last logged error code.
* Calling this operation resets the error code.
*
* @return Last error, 0 if none was logged since last call to last_error.
*/
FLECS_API
int ecs_log_last_error(void);
////////////////////////////////////////////////////////////////////////////////
//// Error codes
////////////////////////////////////////////////////////////////////////////////
#define ECS_INVALID_OPERATION (1)
#define ECS_INVALID_PARAMETER (2)
#define ECS_CONSTRAINT_VIOLATED (3)
#define ECS_OUT_OF_MEMORY (4)
#define ECS_OUT_OF_RANGE (5)
#define ECS_UNSUPPORTED (6)
#define ECS_INTERNAL_ERROR (7)
#define ECS_ALREADY_DEFINED (8)
#define ECS_MISSING_OS_API (9)
#define ECS_OPERATION_FAILED (10)
#define ECS_INVALID_CONVERSION (11)
#define ECS_ID_IN_USE (12)
#define ECS_CYCLE_DETECTED (13)
#define ECS_LEAK_DETECTED (14)
#define ECS_DOUBLE_FREE (15)
#define ECS_INCONSISTENT_NAME (20)
#define ECS_NAME_IN_USE (21)
#define ECS_NOT_A_COMPONENT (22)
#define ECS_INVALID_COMPONENT_SIZE (23)
#define ECS_INVALID_COMPONENT_ALIGNMENT (24)
#define ECS_COMPONENT_NOT_REGISTERED (25)
#define ECS_INCONSISTENT_COMPONENT_ID (26)
#define ECS_INCONSISTENT_COMPONENT_ACTION (27)
#define ECS_MODULE_UNDEFINED (28)
#define ECS_MISSING_SYMBOL (29)
#define ECS_ALREADY_IN_USE (30)
#define ECS_ACCESS_VIOLATION (40)
#define ECS_COLUMN_INDEX_OUT_OF_RANGE (41)
#define ECS_COLUMN_IS_NOT_SHARED (42)
#define ECS_COLUMN_IS_SHARED (43)
#define ECS_COLUMN_TYPE_MISMATCH (45)
#define ECS_INVALID_WHILE_READONLY (70)
#define ECS_LOCKED_STORAGE (71)
#define ECS_INVALID_FROM_WORKER (72)
////////////////////////////////////////////////////////////////////////////////
//// Used when logging with colors is enabled
////////////////////////////////////////////////////////////////////////////////
#define ECS_BLACK "\033[1;30m"
#define ECS_RED "\033[0;31m"
#define ECS_GREEN "\033[0;32m"
#define ECS_YELLOW "\033[0;33m"
#define ECS_BLUE "\033[0;34m"
#define ECS_MAGENTA "\033[0;35m"
#define ECS_CYAN "\033[0;36m"
#define ECS_WHITE "\033[1;37m"
#define ECS_GREY "\033[0;37m"
#define ECS_NORMAL "\033[0;49m"
#define ECS_BOLD "\033[1;49m"
#ifdef __cplusplus
}
#endif
/** @} */
#endif // FLECS_LOG_H
/* Handle addon dependencies that need declarations to be visible in header */
#ifdef FLECS_MONITOR
#ifndef FLECS_STATS
#define FLECS_STATS
#endif
#ifndef FLECS_SYSTEM
#define FLECS_SYSTEM
#endif
#ifndef FLECS_TIMER
#define FLECS_TIMER
#endif
#endif
#ifdef FLECS_REST
#define FLECS_HTTP
#endif
#ifdef FLECS_PLECS
#define FLECS_EXPR
#endif
#ifdef FLECS_APP
#ifdef FLECS_NO_APP
#error "FLECS_NO_APP failed: APP is required by other addons"
#endif
/**
* @file addons/app.h
* @brief App addon.
*
* The app addon is a wrapper around the application's main loop. Its main
* purpose is to provide a hook to modules that need to take control of the
* main loop, as is for example the case with native applications that use
* emscripten with webGL.
*/
#ifdef FLECS_APP
#ifndef FLECS_PIPELINE
#define FLECS_PIPELINE
#endif
#ifndef FLECS_APP_H
#define FLECS_APP_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup c_addons_app App
* @ingroup c_addons
* Optional addon for running the main application loop.
*
* @{
*/
/** Callback type for init action. */
typedef int(*ecs_app_init_action_t)(
ecs_world_t *world);
/** Used with ecs_app_run(). */
typedef struct ecs_app_desc_t {
ecs_ftime_t target_fps; /**< Target FPS. */
ecs_ftime_t delta_time; /**< Frame time increment (0 for measured values) */
int32_t threads; /**< Number of threads. */
int32_t frames; /**< Number of frames to run (0 for infinite) */
bool enable_rest; /**< Enables ECS access over HTTP, necessary for explorer */
bool enable_monitor; /**< Periodically collect statistics */
uint16_t port; /**< HTTP port used by REST API */
ecs_app_init_action_t init; /**< If set, function is ran before starting the
* main loop. */
void *ctx; /**< Reserved for custom run/frame actions */
} ecs_app_desc_t;
/** Callback type for run action. */
typedef int(*ecs_app_run_action_t)(
ecs_world_t *world,
ecs_app_desc_t *desc);
/** Callback type for frame action. */
typedef int(*ecs_app_frame_action_t)(
ecs_world_t *world,
const ecs_app_desc_t *desc);
/** Run application.
* This will run the application with the parameters specified in desc. After
* the application quits (ecs_quit() is called) the world will be cleaned up.
*
* If a custom run action is set, it will be invoked by this operation. The
* default run action calls the frame action in a loop until it returns a
* non-zero value.
*
* @param world The world.
* @param desc Application parameters.
*/
FLECS_API
int ecs_app_run(
ecs_world_t *world,
ecs_app_desc_t *desc);
/** Default frame callback.
* This operation will run a single frame. By default this operation will invoke
* ecs_progress() directly, unless a custom frame action is set.
*
* @param world The world.
* @param desc The desc struct passed to ecs_app_run().
* @return value returned by ecs_progress()
*/
FLECS_API
int ecs_app_run_frame(
ecs_world_t *world,
const ecs_app_desc_t *desc);
/** Set custom run action.
* See ecs_app_run().
*
* @param callback The run action.
*/
FLECS_API
int ecs_app_set_run_action(
ecs_app_run_action_t callback);
/** Set custom frame action.
* See ecs_app_run_frame().
*
* @param callback The frame action.
*/
FLECS_API
int ecs_app_set_frame_action(
ecs_app_frame_action_t callback);
/** @} */
#ifdef __cplusplus
}
#endif
#endif
#endif // FLECS_APP
#endif
#ifdef FLECS_HTTP
#ifdef FLECS_NO_HTTP
#error "FLECS_NO_HTTP failed: HTTP is required by other addons"
#endif
/**
* @file addons/http.h
* @brief HTTP addon.
*
* Minimalistic HTTP server that can receive and reply to simple HTTP requests.
* The main goal of this addon is to enable remotely connecting to a running
* Flecs application (for example, with a web-based UI) and request/visualize
* data from the ECS world.
*
* Each server instance creates a single thread used for receiving requests.
* Receiving requests are enqueued and handled when the application calls
* ecs_http_server_dequeue(). This increases latency of request handling vs.
* responding directly in the receive thread, but is better suited for
* retrieving data from ECS applications, as requests can be processed by an ECS
* system without having to lock the world.
*
* This server is intended to be used in a development environment.
*/
#ifdef FLECS_HTTP
/**
* @defgroup c_addons_http Http
* @ingroup c_addons
* Simple HTTP server used for serving up REST API.
*
* @{
*/
#if !defined(FLECS_OS_API_IMPL) && !defined(FLECS_NO_OS_API_IMPL)
#define FLECS_OS_API_IMPL
#endif
#ifndef FLECS_HTTP_H
#define FLECS_HTTP_H
/* Maximum number of headers in request */
#define ECS_HTTP_HEADER_COUNT_MAX (32)
/* Maximum number of query parameters in request */
#define ECS_HTTP_QUERY_PARAM_COUNT_MAX (32)
#ifdef __cplusplus
extern "C" {
#endif
/** HTTP server */
typedef struct ecs_http_server_t ecs_http_server_t;
/** A connection manages communication with the remote host */
typedef struct {
uint64_t id;
ecs_http_server_t *server;
char host[128];
char port[16];
} ecs_http_connection_t;
/** Helper type used for headers & URL query parameters */
typedef struct {
const char *key;
const char *value;
} ecs_http_key_value_t;
/** Supported request methods */
typedef enum {
EcsHttpGet,
EcsHttpPost,
EcsHttpPut,
EcsHttpDelete,
EcsHttpOptions,
EcsHttpMethodUnsupported
} ecs_http_method_t;
/** A request */
typedef struct {
uint64_t id;
ecs_http_method_t method;
char *path;
char *body;
ecs_http_key_value_t headers[ECS_HTTP_HEADER_COUNT_MAX];
ecs_http_key_value_t params[ECS_HTTP_HEADER_COUNT_MAX];
int32_t header_count;
int32_t param_count;
ecs_http_connection_t *conn;
} ecs_http_request_t;
/** A reply */
typedef struct {
int code; /**< default = 200 */
ecs_strbuf_t body; /**< default = "" */
const char* status; /**< default = OK */
const char* content_type; /**< default = application/json */
ecs_strbuf_t headers; /**< default = "" */
} ecs_http_reply_t;
#define ECS_HTTP_REPLY_INIT \
(ecs_http_reply_t){200, ECS_STRBUF_INIT, "OK", "application/json", ECS_STRBUF_INIT}
/* Global statistics. */
extern int64_t ecs_http_request_received_count;
extern int64_t ecs_http_request_invalid_count;
extern int64_t ecs_http_request_handled_ok_count;
extern int64_t ecs_http_request_handled_error_count;
extern int64_t ecs_http_request_not_handled_count;
extern int64_t ecs_http_request_preflight_count;
extern int64_t ecs_http_send_ok_count;
extern int64_t ecs_http_send_error_count;
extern int64_t ecs_http_busy_count;
/** Request callback.
* Invoked for each valid request. The function should populate the reply and
* return true. When the function returns false, the server will reply with a
* 404 (Not found) code. */
typedef bool (*ecs_http_reply_action_t)(
const ecs_http_request_t* request,
ecs_http_reply_t *reply,
void *ctx);
/** Used with ecs_http_server_init(). */
typedef struct {
ecs_http_reply_action_t callback; /**< Function called for each request */
void *ctx; /**< Passed to callback (optional) */
uint16_t port; /**< HTTP port */
const char *ipaddr; /**< Interface to listen on (optional) */
int32_t send_queue_wait_ms; /**< Send queue wait time when empty */
ecs_ftime_t cache_timeout; /**< Cache invalidation timeout (0 disables caching) */
ecs_ftime_t cache_purge_timeout; /**< Cache purge timeout (for purging cache entries) */
} ecs_http_server_desc_t;
/** Create server.
* Use ecs_http_server_start() to start receiving requests.
*
* @param desc Server configuration parameters.
* @return The new server, or NULL if creation failed.
*/
FLECS_API
ecs_http_server_t* ecs_http_server_init(
const ecs_http_server_desc_t *desc);
/** Destroy server.
* This operation will stop the server if it was still running.
*
* @param server The server to destroy.
*/
FLECS_API
void ecs_http_server_fini(
ecs_http_server_t* server);
/** Start server.
* After this operation the server will be able to accept requests.
*
* @param server The server to start.
* @return Zero if successful, non-zero if failed.
*/
FLECS_API
int ecs_http_server_start(
ecs_http_server_t* server);
/** Process server requests.
* This operation invokes the reply callback for each received request. No new
* requests will be enqueued while processing requests.
*
* @param server The server for which to process requests.
*/
FLECS_API
void ecs_http_server_dequeue(
ecs_http_server_t* server,
ecs_ftime_t delta_time);
/** Stop server.
* After this operation no new requests can be received.
*
* @param server The server.
*/
FLECS_API
void ecs_http_server_stop(
ecs_http_server_t* server);
/** Emulate a request.
* The request string must be a valid HTTP request. A minimal example:
*
* GET /entity/flecs/core/World?label=true HTTP/1.1
*
* @param srv The server.
* @param req The request.
* @param len The length of the request (optional).
* @return The reply.
*/
FLECS_API
int ecs_http_server_http_request(
ecs_http_server_t* srv,
const char *req,
ecs_size_t len,
ecs_http_reply_t *reply_out);
/** Convenience wrapper around ecs_http_server_http_request(). */
FLECS_API
int ecs_http_server_request(
ecs_http_server_t* srv,
const char *method,
const char *req,
ecs_http_reply_t *reply_out);
/** Get context provided in ecs_http_server_desc_t */
FLECS_API
void* ecs_http_server_ctx(
ecs_http_server_t* srv);
/** Find header in request.
*
* @param req The request.
* @param name name of the header to find
* @return The header value, or NULL if not found.
*/
FLECS_API
const char* ecs_http_get_header(
const ecs_http_request_t* req,
const char* name);
/** Find query parameter in request.
*
* @param req The request.
* @param name The parameter name.
* @return The decoded parameter value, or NULL if not found.
*/
FLECS_API
const char* ecs_http_get_param(
const ecs_http_request_t* req,
const char* name);
#ifdef __cplusplus
}
#endif
/** @} */
#endif // FLECS_HTTP_H
#endif // FLECS_HTTP
#endif
#ifdef FLECS_REST
#ifdef FLECS_NO_REST
#error "FLECS_NO_REST failed: REST is required by other addons"
#endif
/**
* @file addons/rest.h
* @brief REST API addon.
*
* A small REST API that uses the HTTP server and JSON serializer to provide
* access to application data for remote applications.
*
* A description of the API can be found in docs/RestApi.md
*/
#ifdef FLECS_REST
/**
* @defgroup c_addons_rest Rest
* @ingroup c_addons
* REST API for querying and mutating entities.
*
* @{
*/
/* Used for the HTTP server */
#ifndef FLECS_HTTP
#define FLECS_HTTP
#endif
/* Used for building the JSON replies */
#ifndef FLECS_JSON
#define FLECS_JSON
#endif
/* Query engine used */
#ifndef FLECS_RULES
#define FLECS_RULES
#endif
/* For the REST system */
#ifndef FLECS_PIPELINE
#define FLECS_PIPELINE
#endif
#ifndef FLECS_REST_H
#define FLECS_REST_H
#ifdef __cplusplus
extern "C" {
#endif
#define ECS_REST_DEFAULT_PORT (27750)
/** Component that instantiates the REST API */
FLECS_API extern const ecs_entity_t ecs_id(EcsRest);
typedef struct {
uint16_t port; /**< Port of server (optional, default = 27750) */
char *ipaddr; /**< Interface address (optional, default = 0.0.0.0) */
void *impl;
} EcsRest;
/** Create HTTP server for REST API.
* This allows for the creation of a REST server that can be managed by the
* application without using Flecs systems.
*
* @param world The world.
* @param desc The HTTP server descriptor.
* @return The HTTP server, or NULL if failed.
*/
FLECS_API
ecs_http_server_t* ecs_rest_server_init(
ecs_world_t *world,
const ecs_http_server_desc_t *desc);
/** Cleanup REST HTTP server.
* The server must have been created with ecs_rest_server_init().
*/
FLECS_API
void ecs_rest_server_fini(
ecs_http_server_t *srv);
/* Module import */
FLECS_API
void FlecsRestImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_TIMER
#ifdef FLECS_NO_TIMER
#error "FLECS_NO_TIMER failed: TIMER is required by other addons"
#endif
/**
* @file addons/timer.h
* @brief Timer module.
*
* Timers can be used to trigger actions at periodic or one-shot intervals. They
* are typically used together with systems and pipelines.
*/
#ifdef FLECS_TIMER
/**
* @defgroup c_addons_timer Timer
* @ingroup c_addons
* Run systems at a time interval.
*
* @{
*/
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifndef FLECS_PIPELINE
#define FLECS_PIPELINE
#endif
#ifndef FLECS_TIMER_H
#define FLECS_TIMER_H
#ifdef __cplusplus
extern "C" {
#endif
/** Component used for one shot/interval timer functionality */
typedef struct EcsTimer {
ecs_ftime_t timeout; /**< Timer timeout period */
ecs_ftime_t time; /**< Incrementing time value */
ecs_ftime_t overshoot; /**< Used to correct returned interval time */
int32_t fired_count; /**< Number of times ticked */
bool active; /**< Is the timer active or not */
bool single_shot; /**< Is this a single shot timer */
} EcsTimer;
/** Apply a rate filter to a tick source */
typedef struct EcsRateFilter {
ecs_entity_t src; /**< Source of the rate filter */
int32_t rate; /**< Rate of the rate filter */
int32_t tick_count; /**< Number of times the rate filter ticked */
ecs_ftime_t time_elapsed; /**< Time elapsed since last tick */
} EcsRateFilter;
/** Set timer timeout.
* This operation executes any systems associated with the timer after the
* specified timeout value. If the entity contains an existing timer, the
* timeout value will be reset. The timer can be started and stopped with
* ecs_start_timer() and ecs_stop_timer().
*
* The timer is synchronous, and is incremented each frame by delta_time.
*
* The tick_source entity will be a tick source after this operation. Tick
* sources can be read by getting the EcsTickSource component. If the tick
* source ticked this frame, the 'tick' member will be true. When the tick
* source is a system, the system will tick when the timer ticks.
*
* @param world The world.
* @param tick_source The timer for which to set the timeout (0 to create one).
* @param timeout The timeout value.
* @return The timer entity.
*/
FLECS_API
ecs_entity_t ecs_set_timeout(
ecs_world_t *world,
ecs_entity_t tick_source,
ecs_ftime_t timeout);
/** Get current timeout value for the specified timer.
* This operation returns the value set by ecs_set_timeout(). If no timer is
* active for this entity, the operation returns 0.
*
* After the timeout expires the EcsTimer component is removed from the entity.
* This means that if ecs_get_timeout() is invoked after the timer is expired, the
* operation will return 0.
*
* The timer is synchronous, and is incremented each frame by delta_time.
*
* The tick_source entity will be a tick source after this operation. Tick
* sources can be read by getting the EcsTickSource component. If the tick
* source ticked this frame, the 'tick' member will be true. When the tick
* source is a system, the system will tick when the timer ticks.
*
* @param world The world.
* @param tick_source The timer.
* @return The current timeout value, or 0 if no timer is active.
*/
FLECS_API
ecs_ftime_t ecs_get_timeout(
const ecs_world_t *world,
ecs_entity_t tick_source);
/** Set timer interval.
* This operation will continuously invoke systems associated with the timer
* after the interval period expires. If the entity contains an existing timer,
* the interval value will be reset.
*
* The timer is synchronous, and is incremented each frame by delta_time.
*
* The tick_source entity will be a tick source after this operation. Tick
* sources can be read by getting the EcsTickSource component. If the tick
* source ticked this frame, the 'tick' member will be true. When the tick
* source is a system, the system will tick when the timer ticks.
*
* @param world The world.
* @param tick_source The timer for which to set the interval (0 to create one).
* @param interval The interval value.
* @return The timer entity.
*/
FLECS_API
ecs_entity_t ecs_set_interval(
ecs_world_t *world,
ecs_entity_t tick_source,
ecs_ftime_t interval);
/** Get current interval value for the specified timer.
* This operation returns the value set by ecs_set_interval(). If the entity is
* not a timer, the operation will return 0.
*
* @param world The world.
* @param tick_source The timer for which to set the interval.
* @return The current interval value, or 0 if no timer is active.
*/
FLECS_API
ecs_ftime_t ecs_get_interval(
const ecs_world_t *world,
ecs_entity_t tick_source);
/** Start timer.
* This operation resets the timer and starts it with the specified timeout.
*
* @param world The world.
* @param tick_source The timer to start.
*/
FLECS_API
void ecs_start_timer(
ecs_world_t *world,
ecs_entity_t tick_source);
/** Stop timer
* This operation stops a timer from triggering.
*
* @param world The world.
* @param tick_source The timer to stop.
*/
FLECS_API
void ecs_stop_timer(
ecs_world_t *world,
ecs_entity_t tick_source);
/** Reset time value of timer to 0.
* This operation resets the timer value to 0.
*
* @param world The world.
* @param tick_source The timer to reset.
*/
FLECS_API
void ecs_reset_timer(
ecs_world_t *world,
ecs_entity_t tick_source);
/** Enable randomizing initial time value of timers.
* Initializes timers with a random time value, which can improve scheduling as
* systems/timers for the same interval don't all happen on the same tick.
*
* @param world The world.
*/
FLECS_API
void ecs_randomize_timers(
ecs_world_t *world);
/** Set rate filter.
* This operation initializes a rate filter. Rate filters sample tick sources
* and tick at a configurable multiple. A rate filter is a tick source itself,
* which means that rate filters can be chained.
*
* Rate filters enable deterministic system execution which cannot be achieved
* with interval timers alone. For example, if timer A has interval 2.0 and
* timer B has interval 4.0, it is not guaranteed that B will tick at exactly
* twice the multiple of A. This is partly due to the indeterministic nature of
* timers, and partly due to floating point rounding errors.
*
* Rate filters can be combined with timers (or other rate filters) to ensure
* that a system ticks at an exact multiple of a tick source (which can be
* another system). If a rate filter is created with a rate of 1 it will tick
* at the exact same time as its source.
*
* If no tick source is provided, the rate filter will use the frame tick as
* source, which corresponds with the number of times ecs_progress() is called.
*
* The tick_source entity will be a tick source after this operation. Tick
* sources can be read by getting the EcsTickSource component. If the tick
* source ticked this frame, the 'tick' member will be true. When the tick
* source is a system, the system will tick when the timer ticks.
*
* @param world The world.
* @param tick_source The rate filter entity (0 to create one).
* @param rate The rate to apply.
* @param source The tick source (0 to use frames)
* @return The filter entity.
*/
FLECS_API
ecs_entity_t ecs_set_rate(
ecs_world_t *world,
ecs_entity_t tick_source,
int32_t rate,
ecs_entity_t source);
/** Assign tick source to system.
* Systems can be their own tick source, which can be any of the tick sources
* (one shot timers, interval times and rate filters). However, in some cases it
* is must be guaranteed that different systems tick on the exact same frame.
*
* This cannot be guaranteed by giving two systems the same interval/rate filter
* as it is possible that one system is (for example) disabled, which would
* cause the systems to go out of sync. To provide these guarantees, systems
* must use the same tick source, which is what this operation enables.
*
* When two systems share the same tick source, it is guaranteed that they tick
* in the same frame. The provided tick source can be any entity that is a tick
* source, including another system. If the provided entity is not a tick source
* the system will not be ran.
*
* To disassociate a tick source from a system, use 0 for the tick_source
* parameter.
*
* @param world The world.
* @param system The system to associate with the timer.
* @param tick_source The tick source to associate with the system.
*/
FLECS_API
void ecs_set_tick_source(
ecs_world_t *world,
ecs_entity_t system,
ecs_entity_t tick_source);
////////////////////////////////////////////////////////////////////////////////
//// Module
////////////////////////////////////////////////////////////////////////////////
FLECS_API
void FlecsTimerImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_PIPELINE
#ifdef FLECS_NO_PIPELINE
#error "FLECS_NO_PIPELINE failed: PIPELINE is required by other addons"
#endif
/**
* @file addons/pipeline.h
* @brief Pipeline module.
*
* The pipeline module provides support for running systems automatically and
* on multiple threads. A pipeline is a collection of tags that can be added to
* systems. When ran, a pipeline will query for all systems that have the tags
* that belong to a pipeline, and run them.
*
* The module defines a number of builtin tags (EcsPreUpdate, EcsOnUpdate,
* EcsPostUpdate etc.) that are registered with the builtin pipeline. The
* builtin pipeline is ran by default when calling ecs_progress(). An
* application can set a custom pipeline with the ecs_set_pipeline() function.
*/
#ifdef FLECS_PIPELINE
/**
* @defgroup c_addons_pipeline Pipeline
* @ingroup c_addons
* Pipelines order and schedule systems for execution.
*
* @{
*/
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifndef FLECS_SYSTEM
#define FLECS_SYSTEM
#endif
#if !defined(FLECS_OS_API_IMPL) && !defined(FLECS_NO_OS_API_IMPL)
#define FLECS_OS_API_IMPL
#endif
#ifndef FLECS_PIPELINE_H
#define FLECS_PIPELINE_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef FLECS_LEGACY
#define ECS_PIPELINE_DEFINE(world, id_, ...) \
{ \
ecs_pipeline_desc_t desc = {0}; \
ecs_entity_desc_t edesc = {0}; \
edesc.id = id_;\
edesc.name = #id_;\
desc.entity = ecs_entity_init(world, &edesc);\
desc.query.filter.expr = #__VA_ARGS__; \
id_ = ecs_pipeline_init(world, &desc); \
ecs_id(id_) = id_;\
} \
ecs_assert(id_ != 0, ECS_INVALID_PARAMETER, NULL);
#define ECS_PIPELINE(world, id, ...) \
ecs_entity_t id = 0, ecs_id(id) = 0; ECS_PIPELINE_DEFINE(world, id, __VA_ARGS__);\
(void)id;\
(void)ecs_id(id);
#define ecs_pipeline(world, ...)\
ecs_pipeline_init(world, &(ecs_pipeline_desc_t) __VA_ARGS__ )
#endif
/* Pipeline descriptor (used with ecs_pipeline_init()) */
typedef struct ecs_pipeline_desc_t {
/* Existing entity to associate with pipeline (optional) */
ecs_entity_t entity;
/* Query descriptor. The first term of the query must match the EcsSystem
* component. */
ecs_query_desc_t query;
} ecs_pipeline_desc_t;
/** Create a custom pipeline.
*/
FLECS_API
ecs_entity_t ecs_pipeline_init(
ecs_world_t *world,
const ecs_pipeline_desc_t *desc);
/** Set a custom pipeline.
* This operation sets the pipeline to run when ecs_progress() is invoked.
*
* @param world The world.
* @param pipeline The pipeline to set.
*/
FLECS_API
void ecs_set_pipeline(
ecs_world_t *world,
ecs_entity_t pipeline);
/** Get the current pipeline.
* This operation gets the current pipeline.
*
* @param world The world.
* @return The current pipeline.
*/
FLECS_API
ecs_entity_t ecs_get_pipeline(
const ecs_world_t *world);
/** Progress a world.
* This operation progresses the world by running all systems that are both
* enabled and periodic on their matching entities.
*
* An application can pass a delta_time into the function, which is the time
* passed since the last frame. This value is passed to systems so they can
* update entity values proportional to the elapsed time since their last
* invocation.
*
* When an application passes 0 to delta_time, ecs_progress() will automatically
* measure the time passed since the last frame. If an application does not uses
* time management, it should pass a non-zero value for delta_time (1.0 is
* recommended). That way, no time will be wasted measuring the time.
*
* @param world The world to progress.
* @param delta_time The time passed since the last frame.
* @return false if ecs_quit() has been called, true otherwise.
*/
FLECS_API
bool ecs_progress(
ecs_world_t *world,
ecs_ftime_t delta_time);
/** Set time scale.
* Increase or decrease simulation speed by the provided multiplier.
*
* @param world The world.
* @param scale The scale to apply (default = 1).
*/
FLECS_API
void ecs_set_time_scale(
ecs_world_t *world,
ecs_ftime_t scale);
/** Reset world clock.
* Reset the clock that keeps track of the total time passed in the simulation.
*
* @param world The world.
*/
FLECS_API
void ecs_reset_clock(
ecs_world_t *world);
/** Run pipeline.
* This will run all systems in the provided pipeline. This operation may be
* invoked from multiple threads, and only when staging is disabled, as the
* pipeline manages staging and, if necessary, synchronization between threads.
*
* If 0 is provided for the pipeline id, the default pipeline will be ran (this
* is either the builtin pipeline or the pipeline set with set_pipeline()).
*
* When using progress() this operation will be invoked automatically for the
* default pipeline (either the builtin pipeline or the pipeline set with
* set_pipeline()). An application may run additional pipelines.
*
* @param world The world.
* @param pipeline The pipeline to run.
*/
FLECS_API
void ecs_run_pipeline(
ecs_world_t *world,
ecs_entity_t pipeline,
ecs_ftime_t delta_time);
////////////////////////////////////////////////////////////////////////////////
//// Threading
////////////////////////////////////////////////////////////////////////////////
/** Set number of worker threads.
* Setting this value to a value higher than 1 will start as many threads and
* will cause systems to evenly distribute matched entities across threads. The
* operation may be called multiple times to reconfigure the number of threads
* used, but never while running a system / pipeline.
* Calling ecs_set_threads() will also end the use of task threads setup with
* ecs_set_task_threads() and vice-versa */
FLECS_API
void ecs_set_threads(
ecs_world_t *world,
int32_t threads);
/** Set number of worker task threads.
* ecs_set_task_threads() is similar to ecs_set_threads(), except threads are treated
* as short-lived tasks and will be created and joined around each update of the world.
* Creation and joining of these tasks will use the os_api_t tasks APIs rather than the
* the standard thread API functions, although they may be the same if desired.
* This function is useful for multithreading world updates using an external
* asynchronous job system rather than long running threads by providing the APIs
* to create tasks for your job system and then wait on their conclusion.
* The operation may be called multiple times to reconfigure the number of task threads
* used, but never while running a system / pipeline.
* Calling ecs_set_task_threads() will also end the use of threads setup with
* ecs_set_threads() and vice-versa */
FLECS_API
void ecs_set_task_threads(
ecs_world_t *world,
int32_t task_threads);
/** Returns true if task thread use have been requested. */
FLECS_API
bool ecs_using_task_threads(
ecs_world_t *world);
////////////////////////////////////////////////////////////////////////////////
//// Module
////////////////////////////////////////////////////////////////////////////////
FLECS_API
void FlecsPipelineImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_SYSTEM
#ifdef FLECS_NO_SYSTEM
#error "FLECS_NO_SYSTEM failed: SYSTEM is required by other addons"
#endif
/**
* @file addons/system.h
* @brief System module.
*
* The system module allows for creating and running systems. A system is a
* query in combination with a callback function. In addition systems have
* support for time management and can be monitored by the stats addon.
*/
#ifdef FLECS_SYSTEM
/**
* @defgroup c_addons_system System
* @ingroup c_addons
* Systems are a query + function that can be ran manually or by a pipeline.
*
* @{
*/
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifndef FLECS_SYSTEM_H
#define FLECS_SYSTEM_H
#ifdef __cplusplus
extern "C" {
#endif
/** Component used to provide a tick source to systems */
typedef struct EcsTickSource {
bool tick; /**< True if providing tick */
ecs_ftime_t time_elapsed; /**< Time elapsed since last tick */
} EcsTickSource;
/** Use with ecs_system_init() */
typedef struct ecs_system_desc_t {
int32_t _canary;
/** Existing entity to associate with system (optional) */
ecs_entity_t entity;
/** System query parameters */
ecs_query_desc_t query;
/** Callback that is invoked when a system is ran.
* When left to NULL, the default system runner is used, which calls the
* "callback" action for each result returned from the system's query.
*
* It should not be assumed that the input iterator can always be iterated
* with ecs_query_next(). When a system is multithreaded and/or paged, the
* iterator can be either a worker or paged iterator. Future use cases may
* introduce additional inputs for a system, such as rules and filters. The
* correct function to use for iteration is ecs_iter_next().
*
* An implementation can test whether the iterator is a query iterator by
* testing whether the it->next value is equal to ecs_query_next(). */
ecs_run_action_t run;
/** Callback that is ran for each result returned by the system's query. This
* means that this callback can be invoked multiple times per system per
* frame, typically once for each matching table. */
ecs_iter_action_t callback;
/** Context to be passed to callback (as ecs_iter_t::param) */
void *ctx;
/** Binding context, for when system is implemented in other language */
void *binding_ctx;
/** Functions that are invoked during system cleanup to free context data.
* When set, functions are called unconditionally, even when the ctx
* pointers are NULL. */
ecs_ctx_free_t ctx_free;
ecs_ctx_free_t binding_ctx_free;
/** Interval in seconds at which the system should run */
ecs_ftime_t interval;
/** Rate at which the system should run */
int32_t rate;
/** External tick source that determines when system ticks */
ecs_entity_t tick_source;
/** If true, system will be ran on multiple threads */
bool multi_threaded;
/** If true, system will have access to the actual world. Cannot be true at the
* same time as multi_threaded. */
bool no_readonly;
} ecs_system_desc_t;
/** Create a system */
FLECS_API
ecs_entity_t ecs_system_init(
ecs_world_t *world,
const ecs_system_desc_t *desc);
#ifndef FLECS_LEGACY
/** Forward declare a system. */
#define ECS_SYSTEM_DECLARE(id) ecs_entity_t ecs_id(id)
/** Define a forward declared system.
*
* Example:
*
* @code
* ECS_SYSTEM_DEFINE(world, Move, EcsOnUpdate, Position, Velocity);
* @endcode
*/
#define ECS_SYSTEM_DEFINE(world, id_, phase, ...) \
{ \
ecs_system_desc_t desc = {0}; \
ecs_entity_desc_t edesc = {0}; \
edesc.id = ecs_id(id_);\
edesc.name = #id_;\
edesc.add[0] = ((phase) ? ecs_pair(EcsDependsOn, (phase)) : 0); \
edesc.add[1] = (phase); \
desc.entity = ecs_entity_init(world, &edesc);\
desc.query.filter.expr = #__VA_ARGS__; \
desc.callback = id_; \
ecs_id(id_) = ecs_system_init(world, &desc); \
} \
ecs_assert(ecs_id(id_) != 0, ECS_INVALID_PARAMETER, NULL)
/** Declare & define a system.
*
* Example:
*
* @code
* ECS_SYSTEM(world, Move, EcsOnUpdate, Position, Velocity);
* @endcode
*/
#define ECS_SYSTEM(world, id, phase, ...) \
ecs_entity_t ecs_id(id) = 0; ECS_SYSTEM_DEFINE(world, id, phase, __VA_ARGS__);\
ecs_entity_t id = ecs_id(id);\
(void)ecs_id(id);\
(void)id
/** Shorthand for creating a system with ecs_system_init().
*
* Example:
*
* @code
* ecs_system(world, {
* .entity = ecs_entity(world, {
* .name = "MyEntity",
* .add = { ecs_dependson(EcsOnUpdate) }
* }),
* .query.filter.terms = {
* { ecs_id(Position) },
* { ecs_id(Velocity) }
* },
* .callback = Move
* });
* @endcode
*/
#define ecs_system(world, ...)\
ecs_system_init(world, &(ecs_system_desc_t) __VA_ARGS__ )
#endif
/** Run a specific system manually.
* This operation runs a single system manually. It is an efficient way to
* invoke logic on a set of entities, as manual systems are only matched to
* tables at creation time or after creation time, when a new table is created.
*
* Manual systems are useful to evaluate lists of pre-matched entities at
* application defined times. Because none of the matching logic is evaluated
* before the system is invoked, manual systems are much more efficient than
* manually obtaining a list of entities and retrieving their components.
*
* An application may pass custom data to a system through the param parameter.
* This data can be accessed by the system through the param member in the
* ecs_iter_t value that is passed to the system callback.
*
* Any system may interrupt execution by setting the interrupted_by member in
* the ecs_iter_t value. This is particularly useful for manual systems, where
* the value of interrupted_by is returned by this operation. This, in
* combination with the param argument lets applications use manual systems
* to lookup entities: once the entity has been found its handle is passed to
* interrupted_by, which is then subsequently returned.
*
* @param world The world.
* @param system The system to run.
* @param delta_time The time passed since the last system invocation.
* @param param A user-defined parameter to pass to the system.
* @return handle to last evaluated entity if system was interrupted.
*/
FLECS_API
ecs_entity_t ecs_run(
ecs_world_t *world,
ecs_entity_t system,
ecs_ftime_t delta_time,
void *param);
/** Same as ecs_run(), but subdivides entities across number of provided stages.
*
* @param world The world.
* @param system The system to run.
* @param stage_current The id of the current stage.
* @param stage_count The total number of stages.
* @param delta_time The time passed since the last system invocation.
* @param param A user-defined parameter to pass to the system.
* @return handle to last evaluated entity if system was interrupted.
*/
FLECS_API
ecs_entity_t ecs_run_worker(
ecs_world_t *world,
ecs_entity_t system,
int32_t stage_current,
int32_t stage_count,
ecs_ftime_t delta_time,
void *param);
/** Run system with offset/limit and type filter.
* This operation is the same as ecs_run(), but filters the entities that will be
* iterated by the system.
*
* Entities can be filtered in two ways. Offset and limit control the range of
* entities that is iterated over. The range is applied to all entities matched
* with the system, thus may cover multiple archetypes.
*
* The type filter controls which entity types the system will evaluate. Only
* types that contain all components in the type filter will be iterated over. A
* type filter is only evaluated once per table, which makes filtering cheap if
* the number of entities is large and the number of tables is small, but not as
* cheap as filtering in the system signature.
*
* @param world The world.
* @param system The system to invoke.
* @param delta_time The time passed since the last system invocation.
* @param param A user-defined parameter to pass to the system.
* @return handle to last evaluated entity if system was interrupted.
*/
FLECS_API
ecs_entity_t ecs_run_w_filter(
ecs_world_t *world,
ecs_entity_t system,
ecs_ftime_t delta_time,
int32_t offset,
int32_t limit,
void *param);
/** Get the query object for a system.
* Systems use queries under the hood. This enables an application to get access
* to the underlying query object of a system. This can be useful when, for
* example, an application needs to enable sorting for a system.
*
* @param world The world.
* @param system The system from which to obtain the query.
* @return The query.
*/
FLECS_API
ecs_query_t* ecs_system_get_query(
const ecs_world_t *world,
ecs_entity_t system);
/** Get system context.
* This operation returns the context pointer set for the system. If
* the provided entity is not a system, the function will return NULL.
*
* @param world The world.
* @param system The system from which to obtain the context.
* @return The context.
*/
FLECS_API
void* ecs_system_get_ctx(
const ecs_world_t *world,
ecs_entity_t system);
/** Get system binding context.
* The binding context is a context typically used to attach any language
* binding specific data that is needed when invoking a callback that is
* implemented in another language.
*
* @param world The world.
* @param system The system from which to obtain the context.
* @return The context.
*/
FLECS_API
void* ecs_system_get_binding_ctx(
const ecs_world_t *world,
ecs_entity_t system);
FLECS_API
void FlecsSystemImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_STATS
#ifdef FLECS_NO_STATS
#error "FLECS_NO_STATS failed: STATS is required by other addons"
#endif
/**
* @file addons/stats.h
* @brief Statistics addon.
*
* The statistics addon enables an application to obtain detailed metrics about
* the storage, systems and operations of a world.
*/
#ifdef FLECS_STATS
/**
* @defgroup c_addons_stats Stats
* @ingroup c_addons
* Collection of statistics for world, queries, systems and pipelines.
*
* @{
*/
#ifndef FLECS_STATS_H
#define FLECS_STATS_H
#ifdef __cplusplus
extern "C" {
#endif
#define ECS_STAT_WINDOW (60)
/** Simple value that indicates current state */
typedef struct ecs_gauge_t {
ecs_float_t avg[ECS_STAT_WINDOW];
ecs_float_t min[ECS_STAT_WINDOW];
ecs_float_t max[ECS_STAT_WINDOW];
} ecs_gauge_t;
/** Monotonically increasing counter */
typedef struct ecs_counter_t {
ecs_gauge_t rate; /**< Keep track of deltas too */
double value[ECS_STAT_WINDOW];
} ecs_counter_t;
/** Make all metrics the same size, so we can iterate over fields */
typedef union ecs_metric_t {
ecs_gauge_t gauge;
ecs_counter_t counter;
} ecs_metric_t;
typedef struct ecs_world_stats_t {
int64_t first_;
/* Entities */
struct {
ecs_metric_t count; /**< Number of entities */
ecs_metric_t not_alive_count; /**< Number of not alive (recyclable) entity ids */
} entities;
/* Component ids */
struct {
ecs_metric_t tag_count; /**< Number of tag ids (ids without data) */
ecs_metric_t component_count; /**< Number of components ids (ids with data) */
ecs_metric_t pair_count; /**< Number of pair ids */
ecs_metric_t type_count; /**< Number of registered types */
ecs_metric_t create_count; /**< Number of times id has been created */
ecs_metric_t delete_count; /**< Number of times id has been deleted */
} components;
/* Tables */
struct {
ecs_metric_t count; /**< Number of tables */
ecs_metric_t empty_count; /**< Number of empty tables */
ecs_metric_t create_count; /**< Number of times table has been created */
ecs_metric_t delete_count; /**< Number of times table has been deleted */
} tables;
/* Queries & events */
struct {
ecs_metric_t query_count; /**< Number of queries */
ecs_metric_t observer_count; /**< Number of observers */
ecs_metric_t system_count; /**< Number of systems */
} queries;
/* Commands */
struct {
ecs_metric_t add_count;
ecs_metric_t remove_count;
ecs_metric_t delete_count;
ecs_metric_t clear_count;
ecs_metric_t set_count;
ecs_metric_t get_mut_count;
ecs_metric_t modified_count;
ecs_metric_t other_count;
ecs_metric_t discard_count;
ecs_metric_t batched_entity_count;
ecs_metric_t batched_count;
} commands;
/* Frame data */
struct {
ecs_metric_t frame_count; /**< Number of frames processed. */
ecs_metric_t merge_count; /**< Number of merges executed. */
ecs_metric_t rematch_count; /**< Number of query rematches */
ecs_metric_t pipeline_build_count; /**< Number of system pipeline rebuilds (occurs when an inactive system becomes active). */
ecs_metric_t systems_ran; /**< Number of systems ran. */
ecs_metric_t observers_ran; /**< Number of times an observer was invoked. */
ecs_metric_t event_emit_count; /**< Number of events emitted */
} frame;
/* Timing */
struct {
ecs_metric_t world_time_raw; /**< Actual time passed since simulation start (first time progress() is called) */
ecs_metric_t world_time; /**< Simulation time passed since simulation start. Takes into account time scaling */
ecs_metric_t frame_time; /**< Time spent processing a frame. Smaller than world_time_total when load is not 100% */
ecs_metric_t system_time; /**< Time spent on running systems. */
ecs_metric_t emit_time; /**< Time spent on notifying observers. */
ecs_metric_t merge_time; /**< Time spent on merging commands. */
ecs_metric_t rematch_time; /**< Time spent on rematching. */
ecs_metric_t fps; /**< Frames per second. */
ecs_metric_t delta_time; /**< Delta_time. */
} performance;
struct {
/* Memory allocation data */
ecs_metric_t alloc_count; /**< Allocs per frame */
ecs_metric_t realloc_count; /**< Reallocs per frame */
ecs_metric_t free_count; /**< Frees per frame */
ecs_metric_t outstanding_alloc_count; /**< Difference between allocs & frees */
/* Memory allocator data */
ecs_metric_t block_alloc_count; /**< Block allocations per frame */
ecs_metric_t block_free_count; /**< Block frees per frame */
ecs_metric_t block_outstanding_alloc_count; /**< Difference between allocs & frees */
ecs_metric_t stack_alloc_count; /**< Page allocations per frame */
ecs_metric_t stack_free_count; /**< Page frees per frame */
ecs_metric_t stack_outstanding_alloc_count; /**< Difference between allocs & frees */
} memory;
/* HTTP statistics */
struct {
ecs_metric_t request_received_count;
ecs_metric_t request_invalid_count;
ecs_metric_t request_handled_ok_count;
ecs_metric_t request_handled_error_count;
ecs_metric_t request_not_handled_count;
ecs_metric_t request_preflight_count;
ecs_metric_t send_ok_count;
ecs_metric_t send_error_count;
ecs_metric_t busy_count;
} http;
int64_t last_;
/** Current position in ring buffer */
int32_t t;
} ecs_world_stats_t;
/** Statistics for a single query (use ecs_query_stats_get()) */
typedef struct ecs_query_stats_t {
int64_t first_;
ecs_metric_t matched_table_count; /**< Matched non-empty tables */
ecs_metric_t matched_empty_table_count; /**< Matched empty tables */
ecs_metric_t matched_entity_count; /**< Number of matched entities */
int64_t last_;
/** Current position in ring buffer */
int32_t t;
} ecs_query_stats_t;
/** Statistics for a single system (use ecs_system_stats_get()) */
typedef struct ecs_system_stats_t {
int64_t first_;
ecs_metric_t time_spent; /**< Time spent processing a system */
ecs_metric_t invoke_count; /**< Number of times system is invoked */
int64_t last_;
bool task; /**< Is system a task */
ecs_query_stats_t query;
} ecs_system_stats_t;
/** Statistics for sync point */
typedef struct ecs_sync_stats_t {
int64_t first_;
ecs_metric_t time_spent;
ecs_metric_t commands_enqueued;
int64_t last_;
int32_t system_count;
bool multi_threaded;
bool no_readonly;
} ecs_sync_stats_t;
/** Statistics for all systems in a pipeline. */
typedef struct ecs_pipeline_stats_t {
/* Allow for initializing struct with {0} */
int8_t canary_;
/** Vector with system ids of all systems in the pipeline. The systems are
* stored in the order they are executed. Merges are represented by a 0. */
ecs_vec_t systems;
/** Vector with sync point stats */
ecs_vec_t sync_points;
/** Map with system statistics. For each system in the systems vector, an
* entry in the map exists of type ecs_system_stats_t. */
ecs_map_t system_stats;
/** Current position in ring buffer */
int32_t t;
int32_t system_count; /**< Number of systems in pipeline */
int32_t active_system_count; /**< Number of active systems in pipeline */
int32_t rebuild_count; /**< Number of times pipeline has rebuilt */
} ecs_pipeline_stats_t;
/** Get world statistics.
*
* @param world The world.
* @param stats Out parameter for statistics.
*/
FLECS_API
void ecs_world_stats_get(
const ecs_world_t *world,
ecs_world_stats_t *stats);
/** Reduce source measurement window into single destination measurement. */
FLECS_API
void ecs_world_stats_reduce(
ecs_world_stats_t *dst,
const ecs_world_stats_t *src);
/** Reduce last measurement into previous measurement, restore old value. */
FLECS_API
void ecs_world_stats_reduce_last(
ecs_world_stats_t *stats,
const ecs_world_stats_t *old,
int32_t count);
/** Repeat last measurement. */
FLECS_API
void ecs_world_stats_repeat_last(
ecs_world_stats_t *stats);
/** Copy last measurement from source to destination. */
FLECS_API
void ecs_world_stats_copy_last(
ecs_world_stats_t *dst,
const ecs_world_stats_t *src);
FLECS_API
void ecs_world_stats_log(
const ecs_world_t *world,
const ecs_world_stats_t *stats);
/** Get query statistics.
* Obtain statistics for the provided query.
*
* @param world The world.
* @param query The query.
* @param stats Out parameter for statistics.
*/
FLECS_API
void ecs_query_stats_get(
const ecs_world_t *world,
const ecs_query_t *query,
ecs_query_stats_t *stats);
/** Reduce source measurement window into single destination measurement. */
FLECS_API
void ecs_query_stats_reduce(
ecs_query_stats_t *dst,
const ecs_query_stats_t *src);
/** Reduce last measurement into previous measurement, restore old value. */
FLECS_API
void ecs_query_stats_reduce_last(
ecs_query_stats_t *stats,
const ecs_query_stats_t *old,
int32_t count);
/** Repeat last measurement. */
FLECS_API
void ecs_query_stats_repeat_last(
ecs_query_stats_t *stats);
/** Copy last measurement from source to destination. */
FLECS_API
void ecs_query_stats_copy_last(
ecs_query_stats_t *dst,
const ecs_query_stats_t *src);
#ifdef FLECS_SYSTEM
/** Get system statistics.
* Obtain statistics for the provided system.
*
* @param world The world.
* @param system The system.
* @param stats Out parameter for statistics.
* @return true if success, false if not a system.
*/
FLECS_API
bool ecs_system_stats_get(
const ecs_world_t *world,
ecs_entity_t system,
ecs_system_stats_t *stats);
/** Reduce source measurement window into single destination measurement */
FLECS_API
void ecs_system_stats_reduce(
ecs_system_stats_t *dst,
const ecs_system_stats_t *src);
/** Reduce last measurement into previous measurement, restore old value. */
FLECS_API
void ecs_system_stats_reduce_last(
ecs_system_stats_t *stats,
const ecs_system_stats_t *old,
int32_t count);
/** Repeat last measurement. */
FLECS_API
void ecs_system_stats_repeat_last(
ecs_system_stats_t *stats);
/** Copy last measurement from source to destination. */
FLECS_API
void ecs_system_stats_copy_last(
ecs_system_stats_t *dst,
const ecs_system_stats_t *src);
#endif
#ifdef FLECS_PIPELINE
/** Get pipeline statistics.
* Obtain statistics for the provided pipeline.
*
* @param world The world.
* @param pipeline The pipeline.
* @param stats Out parameter for statistics.
* @return true if success, false if not a pipeline.
*/
FLECS_API
bool ecs_pipeline_stats_get(
ecs_world_t *world,
ecs_entity_t pipeline,
ecs_pipeline_stats_t *stats);
/** Free pipeline stats.
*
* @param stats The stats to free.
*/
FLECS_API
void ecs_pipeline_stats_fini(
ecs_pipeline_stats_t *stats);
/** Reduce source measurement window into single destination measurement */
FLECS_API
void ecs_pipeline_stats_reduce(
ecs_pipeline_stats_t *dst,
const ecs_pipeline_stats_t *src);
/** Reduce last measurement into previous measurement, restore old value. */
FLECS_API
void ecs_pipeline_stats_reduce_last(
ecs_pipeline_stats_t *stats,
const ecs_pipeline_stats_t *old,
int32_t count);
/** Repeat last measurement. */
FLECS_API
void ecs_pipeline_stats_repeat_last(
ecs_pipeline_stats_t *stats);
/** Copy last measurement to destination.
* This operation copies the last measurement into the destination. It does not
* modify the cursor.
*
* @param dst The metrics.
* @param src The metrics to copy.
*/
FLECS_API
void ecs_pipeline_stats_copy_last(
ecs_pipeline_stats_t *dst,
const ecs_pipeline_stats_t *src);
#endif
/** Reduce all measurements from a window into a single measurement. */
FLECS_API
void ecs_metric_reduce(
ecs_metric_t *dst,
const ecs_metric_t *src,
int32_t t_dst,
int32_t t_src);
/** Reduce last measurement into previous measurement */
FLECS_API
void ecs_metric_reduce_last(
ecs_metric_t *m,
int32_t t,
int32_t count);
/** Copy measurement */
FLECS_API
void ecs_metric_copy(
ecs_metric_t *m,
int32_t dst,
int32_t src);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_METRICS
#ifdef FLECS_NO_METRICS
#error "FLECS_NO_METRICS failed: METRICS is required by other addons"
#endif
/**
* @file addons/metrics.h
* @brief Metrics module.
*
* The metrics module extracts metrics from components and makes them available
* through a unified component interface.
*/
#ifdef FLECS_METRICS
/**
* @defgroup c_addons_metrics Metrics
* @ingroup c_addons
* Collect user-defined metrics from ECS data.
*
* @{
*/
#ifndef FLECS_METRICS_H
#define FLECS_METRICS_H
#ifndef FLECS_META
#define FLECS_META
#endif
#ifndef FLECS_UNITS
#define FLECS_UNITS
#endif
#ifndef FLECS_PIPELINE
#define FLECS_PIPELINE
#endif
#ifdef __cplusplus
extern "C" {
#endif
FLECS_API extern ECS_COMPONENT_DECLARE(FlecsMetrics);
/** Tag added to metrics, and used as first element of metric kind pair */
FLECS_API extern ECS_TAG_DECLARE(EcsMetric);
/** Metric that has monotonically increasing value */
FLECS_API extern ECS_TAG_DECLARE(EcsCounter);
/** Counter metric that is auto-incremented by source value */
FLECS_API extern ECS_TAG_DECLARE(EcsCounterIncrement);
/** Counter metric that counts the number of entities with an id */
FLECS_API extern ECS_TAG_DECLARE(EcsCounterId);
/** Metric that represents current value */
FLECS_API extern ECS_TAG_DECLARE(EcsGauge);
/** Tag added to metric instances */
FLECS_API extern ECS_TAG_DECLARE(EcsMetricInstance);
/** Component with metric instance value */
FLECS_API extern ECS_COMPONENT_DECLARE(EcsMetricValue);
/** Component with entity source of metric instance */
FLECS_API extern ECS_COMPONENT_DECLARE(EcsMetricSource);
typedef struct EcsMetricValue {
double value;
} EcsMetricValue;
typedef struct EcsMetricSource {
ecs_entity_t entity;
} EcsMetricSource;
typedef struct ecs_metric_desc_t {
int32_t _canary;
/** Entity associated with metric */
ecs_entity_t entity;
/** Entity associated with member that stores metric value. Must not be set
* at the same time as id. Cannot be combined with EcsCounterId. */
ecs_entity_t member;
/* Member dot expression. Can be used instead of member and supports nested
* members. Must be set together with id and should not be set at the same
* time as member. */
const char *dotmember;
/** Tracks whether entities have the specified component id. Must not be set
* at the same time as member. */
ecs_id_t id;
/** If id is a (R, *) wildcard and relationship R has the OneOf property,
* setting this value to true will track individual targets.
* If the kind is EcsCountId and the id is a (R, *) wildcard, this value
* will create a metric per target. */
bool targets;
/** Must be EcsGauge, EcsCounter, EcsCounterIncrement or EcsCounterId */
ecs_entity_t kind;
/** Description of metric. Will only be set if FLECS_DOC addon is enabled */
const char *brief;
} ecs_metric_desc_t;
/** Create a new metric.
* Metrics are entities that store values measured from a range of different
* properties in the ECS storage. Metrics provide a single unified interface to
* discovering and reading these values, which can be useful for monitoring
* utilities, or for debugging.
*
* Examples of properties that can be measured by metrics are:
* - Component member values
* - How long an entity has had a specific component
* - How long an entity has had a specific target for a relationship
* - How many entities have a specific component
*
* Metrics can either be created as a "gauge" or "counter". A gauge is a metric
* that represents the value of something at a specific point in time, for
* example "velocity". A counter metric represents a value that is monotonically
* increasing, for example "miles driven".
*
* There are three different kinds of counter metric kinds:
* - EcsCounter
* When combined with a member, this will store the actual value of the member
* in the metric. This is useful for values that are already counters, such as
* a MilesDriven component.
* This kind creates a metric per entity that has the member/id.
*
* - EcsCounterIncrement
* When combined with a member, this will increment the value of the metric by
* the value of the member * delta_time. This is useful for values that are
* not counters, such as a Velocity component.
* This kind creates a metric per entity that has the member.
*
* - EcsCounterId
* This metric kind will count the number of entities with a specific
* (component) id. This kind creates a single metric instance for regular ids,
* and a metric instance per target for wildcard ids when targets is set.
*
* @param world The world.
* @param desc Metric description.
* @return The metric entity.
*/
FLECS_API
ecs_entity_t ecs_metric_init(
ecs_world_t *world,
const ecs_metric_desc_t *desc);
/** Shorthand for creating a metric with ecs_metric_init().
*
* Example:
*
* @code
* ecs_metric(world, {
* .member = ecs_lookup_fullpath(world, "Position.x")
* .kind = EcsGauge
* });
* @endcode
*/
#define ecs_metric(world, ...)\
ecs_metric_init(world, &(ecs_metric_desc_t) __VA_ARGS__ )
/* Module import */
FLECS_API
void FlecsMetricsImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_ALERTS
#ifdef FLECS_NO_ALERTS
#error "FLECS_NO_ALERTS failed: ALERTS is required by other addons"
#endif
/**
* @file addons/alerts.h
* @brief Alerts module.
*
* The alerts module enables applications to register alerts for when certain
* conditions are met. Alerts are registered as queries, and automatically
* become active when entities match the alert query.
*/
#ifdef FLECS_ALERTS
/**
* @defgroup c_addons_alerts Alerts
* @ingroup c_addons
* Create alerts from monitoring queries.
*
* @{
*/
#ifndef FLECS_ALERTS_H
#define FLECS_ALERTS_H
#ifndef FLECS_RULES
#define FLECS_RULES
#endif
#ifndef FLECS_PIPELINE
#define FLECS_PIPELINE
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define ECS_ALERT_MAX_SEVERITY_FILTERS (4)
/* Module id */
FLECS_API extern ECS_COMPONENT_DECLARE(FlecsAlerts);
/* Module components */
/** Tag added to alert, and used as first element of alert severity pair */
FLECS_API extern ECS_COMPONENT_DECLARE(EcsAlert);
FLECS_API extern ECS_COMPONENT_DECLARE(EcsAlertInstance);
FLECS_API extern ECS_COMPONENT_DECLARE(EcsAlertsActive);
FLECS_API extern ECS_COMPONENT_DECLARE(EcsAlertTimeout);
/* Alert severity tags */
FLECS_API extern ECS_TAG_DECLARE(EcsAlertInfo);
FLECS_API extern ECS_TAG_DECLARE(EcsAlertWarning);
FLECS_API extern ECS_TAG_DECLARE(EcsAlertError);
FLECS_API extern ECS_TAG_DECLARE(EcsAlertCritical);
/** Alert information. Added to each alert instance */
typedef struct EcsAlertInstance {
char *message;
} EcsAlertInstance;
/** Map with active alerts for entity. */
typedef struct EcsAlertsActive {
int32_t info_count;
int32_t warning_count;
int32_t error_count;
ecs_map_t alerts;
} EcsAlertsActive;
typedef struct ecs_alert_severity_filter_t {
ecs_entity_t severity; /* Severity kind */
ecs_id_t with; /* Component to match */
const char *var; /* Variable to match component on. Do not include the
* '$' character. Leave to NULL for $this. */
int32_t _var_index; /* Index of variable in filter (do not set) */
} ecs_alert_severity_filter_t;
typedef struct ecs_alert_desc_t {
int32_t _canary;
/** Entity associated with alert */
ecs_entity_t entity;
/** Alert query. An alert will be created for each entity that matches the
* specified query. The query must have at least one term that uses the
* $this variable (default). */
ecs_filter_desc_t filter;
/** Template for alert message. This string is used to generate the alert
* message and may refer to variables in the query result. The format for
* the template expressions is as specified by ecs_interpolate_string().
*
* Examples:
*
* "$this has Position but not Velocity"
* "$this has a parent entity $parent without Position"
*/
const char *message;
/** User friendly name. Will only be set if FLECS_DOC addon is enabled. */
const char *doc_name;
/** Description of alert. Will only be set if FLECS_DOC addon is enabled */
const char *brief;
/** Metric kind. Must be EcsAlertInfo, EcsAlertWarning, EcsAlertError or
* EcsAlertCritical. Defaults to EcsAlertError. */
ecs_entity_t severity;
/** Severity filters can be used to assign different severities to the same
* alert. This prevents having to create multiple alerts, and allows
* entities to transition between severities without resetting the
* alert duration (optional). */
ecs_alert_severity_filter_t severity_filters[ECS_ALERT_MAX_SEVERITY_FILTERS];
/** The retain period specifies how long an alert must be inactive before it
* is cleared. This makes it easier to track noisy alerts. While an alert is
* inactive its duration won't increase.
* When the retain period is 0, the alert will clear immediately after it no
* longer matches the alert query. */
ecs_ftime_t retain_period;
/** Alert when member value is out of range. Uses the warning/error ranges
* assigned to the member in the MemberRanges component (optional). */
ecs_entity_t member;
/** (Component) id of member to monitor. If left to 0 this will be set to
* the parent entity of the member (optional). */
ecs_id_t id;
/** Variable from which to fetch the member (optional). When left to NULL
* 'id' will be obtained from $this. */
const char *var;
} ecs_alert_desc_t;
/** Create a new alert.
* An alert is a query that is evaluated periodically and creates alert
* instances for each entity that matches the query. Alerts can be used to
* automate detection of errors in an application.
*
* Alerts are automatically cleared when a query is no longer true for an alert
* instance. At most one alert instance will be created per matched entity.
*
* Alert instances have three components:
* - AlertInstance: contains the alert message for the instance
* - MetricSource: contains the entity that triggered the alert
* - MetricValue: contains how long the alert has been active
*
* Alerts reuse components from the metrics addon so that alert instances can be
* tracked and discovered as metrics. Just like metrics, alert instances are
* created as children of the alert.
*
* When an entity has active alerts, it will have the EcsAlertsActive component
* which contains a map with active alerts for the entity. This component
* will be automatically removed once all alerts are cleared for the entity.
*
* @param world The world.
* @param desc Alert description.
* @return The alert entity.
*/
FLECS_API
ecs_entity_t ecs_alert_init(
ecs_world_t *world,
const ecs_alert_desc_t *desc);
#define ecs_alert(world, ...)\
ecs_alert_init(world, &(ecs_alert_desc_t)__VA_ARGS__)
/** Return number of active alerts for entity.
* When a valid alert entity is specified for the alert parameter, the operation
* will return whether the specified alert is active for the entity. When no
* alert is specified, the operation will return the total number of active
* alerts for the entity.
*
* @param world The world.
* @param entity The entity.
* @param alert The alert to test for (optional).
* @return The number of active alerts for the entity.
*/
FLECS_API
int32_t ecs_get_alert_count(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_entity_t alert);
/** Return alert instance for specified alert.
* This operation returns the alert instance for the specified alert. If the
* alert is not active for the entity, the operation will return 0.
*
* @param world The world.
* @param entity The entity.
* @param alert The alert to test for.
* @return The alert instance for the specified alert.
*/
FLECS_API
ecs_entity_t ecs_get_alert(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_entity_t alert);
/* Module import */
FLECS_API
void FlecsAlertsImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_MONITOR
#ifdef FLECS_NO_MONITOR
#error "FLECS_NO_MONITOR failed: MONITOR is required by other addons"
#endif
/**
* @file addons/monitor.h
* @brief Doc module.
*
* The monitor module automatically tracks statistics from the stats addon and
* stores them in components.
*/
#ifdef FLECS_MONITOR
/**
* @defgroup c_addons_monitor Monitor
* @ingroup c_addons
* The monitor addon periodically tracks statistics for the world and systems.
*
* @{
*/
#ifndef FLECS_MONITOR_H
#define FLECS_MONITOR_H
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifndef FLECS_STATS
#define FLECS_STATS
#endif
#ifdef __cplusplus
extern "C" {
#endif
FLECS_API extern ECS_COMPONENT_DECLARE(FlecsMonitor);
FLECS_API extern ECS_COMPONENT_DECLARE(EcsWorldStats);
FLECS_API extern ECS_COMPONENT_DECLARE(EcsWorldSummary);
FLECS_API extern ECS_COMPONENT_DECLARE(EcsPipelineStats);
FLECS_API extern ecs_entity_t EcsPeriod1s;
FLECS_API extern ecs_entity_t EcsPeriod1m;
FLECS_API extern ecs_entity_t EcsPeriod1h;
FLECS_API extern ecs_entity_t EcsPeriod1d;
FLECS_API extern ecs_entity_t EcsPeriod1w;
typedef struct {
ecs_ftime_t elapsed;
int32_t reduce_count;
} EcsStatsHeader;
typedef struct {
EcsStatsHeader hdr;
ecs_world_stats_t stats;
} EcsWorldStats;
typedef struct {
EcsStatsHeader hdr;
ecs_pipeline_stats_t stats;
} EcsPipelineStats;
typedef struct {
/* Target FPS */
double target_fps; /**< Target FPS */
/* Total time */
double frame_time_total; /**< Total time spent processing a frame */
double system_time_total; /**< Total time spent in systems */
double merge_time_total; /**< Total time spent in merges */
/* Last frame time */
double frame_time_last; /**< Time spent processing a frame */
double system_time_last; /**< Time spent in systems */
double merge_time_last; /**< Time spent in merges */
} EcsWorldSummary;
/* Module import */
FLECS_API
void FlecsMonitorImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_COREDOC
#ifdef FLECS_NO_COREDOC
#error "FLECS_NO_COREDOC failed: COREDOC is required by other addons"
#endif
/**
* @file addons/coredoc.h
* @brief Core doc module.
*
* The core doc module imports documentation and reflection data for core
* components, tags and systems.
*/
#ifdef FLECS_COREDOC
#ifndef FLECS_DOC
#define FLECS_DOC
#endif
#ifndef FLECS_META
#define FLECS_META
#endif
#ifndef FLECS_COREDOC_H
#define FLECS_COREDOC_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup c_addons_coredoc Coredoc
* @ingroup c_addons
* Module that adds documentation and reflection to core entities.
*
* @{
*/
/* Module import */
FLECS_API
void FlecsCoreDocImport(
ecs_world_t *world);
/** @} */
#ifdef __cplusplus
}
#endif
#endif
#endif
#endif
#ifdef FLECS_DOC
#ifdef FLECS_NO_DOC
#error "FLECS_NO_DOC failed: DOC is required by other addons"
#endif
/**
* @file addons/doc.h
* @brief Doc module.
*
* The doc module allows for documenting entities (and thus components, systems)
* by adding brief and/or detailed descriptions as components. Documentation
* added with the doc module can be retrieved at runtime, and can be used by
* tooling such as UIs or documentation frameworks.
*/
#ifdef FLECS_DOC
#ifndef FLECS_DOC_H
#define FLECS_DOC_H
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup c_addons_doc Doc
* @ingroup c_addons
* Utilities for documenting entities, components and systems.
*
* @{
*/
FLECS_API extern const ecs_entity_t ecs_id(EcsDocDescription);
FLECS_API extern const ecs_entity_t EcsDocBrief;
FLECS_API extern const ecs_entity_t EcsDocDetail;
FLECS_API extern const ecs_entity_t EcsDocLink;
FLECS_API extern const ecs_entity_t EcsDocColor;
typedef struct EcsDocDescription {
char *value;
} EcsDocDescription;
/** Add human-readable name to entity.
* Contrary to entity names, human readable names do not have to be unique and
* can contain special characters used in the query language like '*'.
*
* @param world The world.
* @param entity The entity to which to add the name.
* @param name The name to add.
*
* @see ecs_doc_get_name()
* @see flecs::doc::set_name()
* @see flecs::entity_builder::set_doc_name()
*/
FLECS_API
void ecs_doc_set_name(
ecs_world_t *world,
ecs_entity_t entity,
const char *name);
/** Add brief description to entity.
*
* @param world The world.
* @param entity The entity to which to add the description.
* @param description The description to add.
*
* @see ecs_doc_get_brief()
* @see flecs::doc::set_brief()
* @see flecs::entity_builder::set_doc_brief()
*/
FLECS_API
void ecs_doc_set_brief(
ecs_world_t *world,
ecs_entity_t entity,
const char *description);
/** Add detailed description to entity.
*
* @param world The world.
* @param entity The entity to which to add the description.
* @param description The description to add.
*
* @see ecs_doc_get_detail()
* @see flecs::doc::set_detail()
* @see flecs::entity_builder::set_doc_detail()
*/
FLECS_API
void ecs_doc_set_detail(
ecs_world_t *world,
ecs_entity_t entity,
const char *description);
/** Add link to external documentation to entity.
*
* @param world The world.
* @param entity The entity to which to add the link.
* @param link The link to add.
*
* @see ecs_doc_get_link()
* @see flecs::doc::set_link()
* @see flecs::entity_builder::set_doc_link()
*/
FLECS_API
void ecs_doc_set_link(
ecs_world_t *world,
ecs_entity_t entity,
const char *link);
/** Add color to entity.
* UIs can use color as hint to improve visualizing entities.
*
* @param world The world.
* @param entity The entity to which to add the link.
* @param color The color to add.
*
* @see ecs_doc_get_color()
* @see flecs::doc::set_color()
* @see flecs::entity_builder::set_doc_color()
*/
FLECS_API
void ecs_doc_set_color(
ecs_world_t *world,
ecs_entity_t entity,
const char *color);
/** Get human readable name from entity.
* If entity does not have an explicit human readable name, this operation will
* return the entity name.
*
* To test if an entity has a human readable name, use:
*
* @code
* ecs_has_pair(world, e, ecs_id(EcsDocDescription), EcsName);
* @endcode
*
* Or in C++:
*
* @code
* e.has<flecs::doc::Description>(flecs::Name);
* @endcode
*
* @param world The world.
* @param entity The entity from which to get the name.
* @return The name.
*
* @see ecs_doc_set_name()
* @see flecs::doc::get_name()
* @see flecs::entity_view::get_doc_name()
*/
FLECS_API
const char* ecs_doc_get_name(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get brief description from entity.
*
* @param world The world.
* @param entity The entity from which to get the description.
* @return The description.
*
* @see ecs_doc_set_brief()
* @see flecs::doc::get_brief()
* @see flecs::entity_view::get_doc_brief()
*/
FLECS_API
const char* ecs_doc_get_brief(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get detailed description from entity.
*
* @param world The world.
* @param entity The entity from which to get the description.
* @return The description.
*
* @see ecs_doc_set_detail()
* @see flecs::doc::get_detail()
* @see flecs::entity_view::get_doc_detail()
*/
FLECS_API
const char* ecs_doc_get_detail(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get link to external documentation from entity.
*
* @param world The world.
* @param entity The entity from which to get the link.
* @return The link.
*
* @see ecs_doc_set_link()
* @see flecs::doc::get_link()
* @see flecs::entity_view::get_doc_link()
*/
FLECS_API
const char* ecs_doc_get_link(
const ecs_world_t *world,
ecs_entity_t entity);
/** Get color from entity.
*
* @param world The world.
* @param entity The entity from which to get the color.
* @return The color.
*
* @see ecs_doc_set_color()
* @see flecs::doc::get_color()
* @see flecs::entity_view::get_doc_color()
*/
FLECS_API
const char* ecs_doc_get_color(
const ecs_world_t *world,
ecs_entity_t entity);
/* Module import */
FLECS_API
void FlecsDocImport(
ecs_world_t *world);
/** @} */
#ifdef __cplusplus
}
#endif
#endif
#endif
#endif
#ifdef FLECS_JSON
#ifdef FLECS_NO_JSON
#error "FLECS_NO_JSON failed: JSON is required by other addons"
#endif
/**
* @file addons/json.h
* @brief JSON parser addon.
*
* Parse expression strings into component values. Entity identifiers,
* enumerations and bitmasks are encoded as strings.
*
* See docs/JsonFormat.md for a description of the JSON format.
*/
#ifdef FLECS_JSON
#ifndef FLECS_EXPR
#define FLECS_EXPR
#endif
#ifndef FLECS_JSON_H
#define FLECS_JSON_H
/**
* @defgroup c_addons_json Json
* @ingroup c_addons
* Functions for serializing to/from JSON.
*
* @{
*/
#ifdef __cplusplus
extern "C" {
#endif
/** Used with ecs_ptr_from_json(), ecs_entity_from_json(). */
typedef struct ecs_from_json_desc_t {
const char *name; /**< Name of expression (used for logging) */
const char *expr; /**< Full expression (used for logging) */
/** Callback that allows for specifying a custom lookup function. The
* default behavior uses ecs_lookup_fullpath() */
ecs_entity_t (*lookup_action)(
const ecs_world_t*,
const char *value,
void *ctx);
void *lookup_ctx;
} ecs_from_json_desc_t;
/** Parse JSON string into value.
* This operation parses a JSON expression into the provided pointer. The
* memory pointed to must be large enough to contain a value of the used type.
*
* @param world The world.
* @param type The type of the expression to parse.
* @param ptr Pointer to the memory to write to.
* @param json The JSON expression to parse.
* @param desc Configuration parameters for deserializer.
* @return Pointer to the character after the last one read, or NULL if failed.
*/
FLECS_API
const char* ecs_ptr_from_json(
const ecs_world_t *world,
ecs_entity_t type,
void *ptr,
const char *json,
const ecs_from_json_desc_t *desc);
/** Parse JSON object with multiple component values into entity. The format
* is the same as the one outputted by ecs_entity_to_json(), but at the moment
* only supports the "ids" and "values" member.
*
* @param world The world.
* @param entity The entity to serialize to.
* @param json The JSON expression to parse (see entity in JSON format manual).
* @param desc Configuration parameters for deserializer.
* @return Pointer to the character after the last one read, or NULL if failed.
*/
FLECS_API
const char* ecs_entity_from_json(
ecs_world_t *world,
ecs_entity_t entity,
const char *json,
const ecs_from_json_desc_t *desc);
/** Parse JSON object with multiple entities into the world. The format is the
* same as the one outputted by ecs_world_to_json().
*
* @param world The world.
* @param json The JSON expression to parse (see iterator in JSON format manual).
*/
FLECS_API
const char* ecs_world_from_json(
ecs_world_t *world,
const char *json,
const ecs_from_json_desc_t *desc);
/** Serialize array into JSON string.
* This operation serializes a value of the provided type to a JSON string. The
* memory pointed to must be large enough to contain a value of the used type.
*
* If count is 0, the function will serialize a single value, not wrapped in
* array brackets. If count is >= 1, the operation will serialize values to a
* a comma-separated list inside of array brackets.
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @param count The number of elements to serialize.
* @return String with JSON expression, or NULL if failed.
*/
FLECS_API
char* ecs_array_to_json(
const ecs_world_t *world,
ecs_entity_t type,
const void *data,
int32_t count);
/** Serialize array into JSON string buffer.
* Same as ecs_array_to_json(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @param count The number of elements to serialize.
* @param buf_out The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_array_to_json_buf(
const ecs_world_t *world,
ecs_entity_t type,
const void *data,
int32_t count,
ecs_strbuf_t *buf_out);
/** Serialize value into JSON string.
* Same as ecs_array_to_json(), with count = 0.
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @return String with JSON expression, or NULL if failed.
*/
FLECS_API
char* ecs_ptr_to_json(
const ecs_world_t *world,
ecs_entity_t type,
const void *data);
/** Serialize value into JSON string buffer.
* Same as ecs_ptr_to_json(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @param buf_out The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_ptr_to_json_buf(
const ecs_world_t *world,
ecs_entity_t type,
const void *data,
ecs_strbuf_t *buf_out);
/** Serialize type info to JSON.
* This serializes type information to JSON, and can be used to store/transmit
* the structure of a (component) value.
*
* If the provided type does not have reflection data, "0" will be returned.
*
* @param world The world.
* @param type The type to serialize to JSON.
* @return A JSON string with the serialized type info, or NULL if failed.
*/
FLECS_API
char* ecs_type_info_to_json(
const ecs_world_t *world,
ecs_entity_t type);
/** Serialize type info into JSON string buffer.
* Same as ecs_type_info_to_json(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world.
* @param type The type to serialize.
* @param buf_out The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_type_info_to_json_buf(
const ecs_world_t *world,
ecs_entity_t type,
ecs_strbuf_t *buf_out);
/** Used with ecs_iter_to_json(). */
typedef struct ecs_entity_to_json_desc_t {
bool serialize_path; /**< Serialize full pathname */
bool serialize_label; /**< Serialize doc name */
bool serialize_brief; /**< Serialize brief doc description */
bool serialize_link; /**< Serialize doc link (URL) */
bool serialize_color; /**< Serialize doc color */
bool serialize_ids; /**< Serialize (component) ids */
bool serialize_id_labels; /**< Serialize labels of (component) ids */
bool serialize_base; /**< Serialize base components */
bool serialize_private; /**< Serialize private components */
bool serialize_hidden; /**< Serialize ids hidden by override */
bool serialize_values; /**< Serialize component values */
bool serialize_type_info; /**< Serialize type info (requires serialize_values) */
bool serialize_alerts; /**< Serialize active alerts for entity */
ecs_entity_t serialize_refs; /**< Serialize references (incoming edges) for relationship */
bool serialize_matches; /**< Serialize which queries entity matches with */
} ecs_entity_to_json_desc_t;
#define ECS_ENTITY_TO_JSON_INIT (ecs_entity_to_json_desc_t){true, false,\
false, false, false, true, false, true, false, false, false, false, false,\
false, false }
/** Serialize entity into JSON string.
* This creates a JSON object with the entity's (path) name, which components
* and tags the entity has, and the component values.
*
* The operation may fail if the entity contains components with invalid values.
*
* @param world The world.
* @param entity The entity to serialize to JSON.
* @return A JSON string with the serialized entity data, or NULL if failed.
*/
FLECS_API
char* ecs_entity_to_json(
const ecs_world_t *world,
ecs_entity_t entity,
const ecs_entity_to_json_desc_t *desc);
/** Serialize entity into JSON string buffer.
* Same as ecs_entity_to_json(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world.
* @param entity The entity to serialize.
* @param buf_out The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_entity_to_json_buf(
const ecs_world_t *world,
ecs_entity_t entity,
ecs_strbuf_t *buf_out,
const ecs_entity_to_json_desc_t *desc);
/** Used with ecs_iter_to_json(). */
typedef struct ecs_iter_to_json_desc_t {
bool serialize_term_ids; /**< Serialize query term component ids */
bool serialize_term_labels; /**< Serialize query term component id labels */
bool serialize_ids; /**< Serialize actual (matched) component ids */
bool serialize_id_labels; /**< Serialize actual (matched) component id labels */
bool serialize_sources; /**< Serialize sources */
bool serialize_variables; /**< Serialize variables */
bool serialize_is_set; /**< Serialize is_set (for optional terms) */
bool serialize_values; /**< Serialize component values */
bool serialize_private; /**< Serialize component values */
bool serialize_entities; /**< Serialize entities (for This terms) */
bool serialize_entity_labels; /**< Serialize doc name for entities */
bool serialize_entity_ids; /**< Serialize numerical ids for entities */
bool serialize_entity_names; /**< Serialize names (not paths) for entities */
bool serialize_variable_labels; /**< Serialize doc name for variables */
bool serialize_variable_ids; /**< Serialize numerical ids for variables */
bool serialize_colors; /**< Serialize doc color for entities */
bool measure_eval_duration; /**< Serialize evaluation duration */
bool serialize_type_info; /**< Serialize type information */
bool serialize_table; /**< Serialize entire table vs. matched components */
bool serialize_rows; /**< Use row-based serialization, with entities in separate elements */
bool serialize_field_info; /**< Serialize metadata for fields returned by query */
bool dont_serialize_results; /**< If true, query won't be evaluated */
} ecs_iter_to_json_desc_t;
#define ECS_ITER_TO_JSON_INIT (ecs_iter_to_json_desc_t){\
.serialize_term_ids = true, \
.serialize_term_labels = false, \
.serialize_ids = true, \
.serialize_id_labels = false, \
.serialize_sources = true, \
.serialize_variables = true, \
.serialize_is_set = true, \
.serialize_values = true, \
.serialize_entities = true, \
.serialize_entity_labels = false, \
.serialize_entity_ids = false, \
.serialize_entity_names = false, \
.serialize_variable_labels = false, \
.serialize_variable_ids = false, \
.serialize_colors = false, \
.measure_eval_duration = false, \
.serialize_type_info = false, \
.serialize_table = false, \
.serialize_rows = false, \
.serialize_field_info = false, \
.dont_serialize_results = false, \
}
/** Serialize iterator into JSON string.
* This operation will iterate the contents of the iterator and serialize them
* to JSON. The function accepts iterators from any source.
*
* @param world The world.
* @param iter The iterator to serialize to JSON.
* @return A JSON string with the serialized iterator data, or NULL if failed.
*/
FLECS_API
char* ecs_iter_to_json(
const ecs_world_t *world,
ecs_iter_t *iter,
const ecs_iter_to_json_desc_t *desc);
/** Serialize iterator into JSON string buffer.
* Same as ecs_iter_to_json(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world.
* @param iter The iterator to serialize.
* @param buf_out The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_iter_to_json_buf(
const ecs_world_t *world,
ecs_iter_t *iter,
ecs_strbuf_t *buf_out,
const ecs_iter_to_json_desc_t *desc);
/** Used with ecs_iter_to_json(). */
typedef struct ecs_world_to_json_desc_t {
bool serialize_builtin; /**< Exclude flecs modules & contents */
bool serialize_modules; /**< Exclude modules & contents */
} ecs_world_to_json_desc_t;
/** Serialize world into JSON string.
* This operation iterates the contents of the world to JSON. The operation is
* equivalent to the following code:
*
* @code
* ecs_filter_t *f = ecs_filter(world, {
* .terms = {{ .id = EcsAny }}
* });
*
* ecs_iter_t it = ecs_filter_init(world, &f);
* ecs_iter_to_json_desc_t desc = { .serialize_table = true };
* ecs_iter_to_json(world, iter, &desc);
* @endcode
*
* @param world The world to serialize.
* @return A JSON string with the serialized iterator data, or NULL if failed.
*/
FLECS_API
char* ecs_world_to_json(
ecs_world_t *world,
const ecs_world_to_json_desc_t *desc);
/** Serialize world into JSON string buffer.
* Same as ecs_world_to_json(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world to serialize.
* @param buf_out The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_world_to_json_buf(
ecs_world_t *world,
ecs_strbuf_t *buf_out,
const ecs_world_to_json_desc_t *desc);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#if defined(FLECS_EXPR) || defined(FLECS_META_C)
#ifndef FLECS_META
#define FLECS_META
#endif
#endif
#ifdef FLECS_UNITS
#ifdef FLECS_NO_UNITS
#error "FLECS_NO_UNITS failed: UNITS is required by other addons"
#endif
/**
* @file addons/units.h
* @brief Units module.
*
* Builtin standard units. The units addon is not imported by default, even if
* the addon is included in the build. To import the module, do:
*
* In C:
*
* @code
* ECS_IMPORT(world, FlecsUnits);
* @endcode
*
* In C++:
*
* @code
* world.import<flecs::units>();
* @endcode
*
* As a result this module behaves just like an application-defined module,
* which means that the ids generated for the entities inside the module are not
* fixed, and depend on the order in which the module is imported.
*/
#ifdef FLECS_UNITS
/**
* @defgroup c_addons_units Units.
* @ingroup c_addons
* Common unit annotations for reflection framework.
*
* @{
*/
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifndef FLECS_META
#define FLECS_META
#endif
#ifndef FLECS_UNITS_H
#define FLECS_UNITS_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup c_addons_units_prefixes Prefixes
* @ingroup c_addons_units
* Prefixes to indicate unit count (e.g. Kilo, Mega)
*
* @{
*/
FLECS_API extern ECS_DECLARE(EcsUnitPrefixes); /* Parent scope for prefixes */
FLECS_API extern ECS_DECLARE(EcsYocto);
FLECS_API extern ECS_DECLARE(EcsZepto);
FLECS_API extern ECS_DECLARE(EcsAtto);
FLECS_API extern ECS_DECLARE(EcsFemto);
FLECS_API extern ECS_DECLARE(EcsPico);
FLECS_API extern ECS_DECLARE(EcsNano);
FLECS_API extern ECS_DECLARE(EcsMicro);
FLECS_API extern ECS_DECLARE(EcsMilli);
FLECS_API extern ECS_DECLARE(EcsCenti);
FLECS_API extern ECS_DECLARE(EcsDeci);
FLECS_API extern ECS_DECLARE(EcsDeca);
FLECS_API extern ECS_DECLARE(EcsHecto);
FLECS_API extern ECS_DECLARE(EcsKilo);
FLECS_API extern ECS_DECLARE(EcsMega);
FLECS_API extern ECS_DECLARE(EcsGiga);
FLECS_API extern ECS_DECLARE(EcsTera);
FLECS_API extern ECS_DECLARE(EcsPeta);
FLECS_API extern ECS_DECLARE(EcsExa);
FLECS_API extern ECS_DECLARE(EcsZetta);
FLECS_API extern ECS_DECLARE(EcsYotta);
FLECS_API extern ECS_DECLARE(EcsKibi);
FLECS_API extern ECS_DECLARE(EcsMebi);
FLECS_API extern ECS_DECLARE(EcsGibi);
FLECS_API extern ECS_DECLARE(EcsTebi);
FLECS_API extern ECS_DECLARE(EcsPebi);
FLECS_API extern ECS_DECLARE(EcsExbi);
FLECS_API extern ECS_DECLARE(EcsZebi);
FLECS_API extern ECS_DECLARE(EcsYobi);
/** @} */
/**
* @defgroup c_addons_units_duration Duration
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsDuration);
FLECS_API extern ECS_DECLARE(EcsPicoSeconds);
FLECS_API extern ECS_DECLARE(EcsNanoSeconds);
FLECS_API extern ECS_DECLARE(EcsMicroSeconds);
FLECS_API extern ECS_DECLARE(EcsMilliSeconds);
FLECS_API extern ECS_DECLARE(EcsSeconds);
FLECS_API extern ECS_DECLARE(EcsMinutes);
FLECS_API extern ECS_DECLARE(EcsHours);
FLECS_API extern ECS_DECLARE(EcsDays);
/** @} */
/**
* @defgroup c_addons_units_time Time
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsTime);
FLECS_API extern ECS_DECLARE(EcsDate);
/** @} */
/**
* @defgroup c_addons_units_mass Mass
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsMass);
FLECS_API extern ECS_DECLARE(EcsGrams);
FLECS_API extern ECS_DECLARE(EcsKiloGrams);
/** @} */
/**
* @defgroup c_addons_units_electric_Current Electric Current
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsElectricCurrent);
FLECS_API extern ECS_DECLARE(EcsAmpere);
/** @} */
/**
* @defgroup c_addons_units_amount Amount
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsAmount);
FLECS_API extern ECS_DECLARE(EcsMole);
/** @} */
/**
* @defgroup c_addons_units_luminous_intensity Luminous Intensity
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsLuminousIntensity);
FLECS_API extern ECS_DECLARE(EcsCandela);
/** @} */
/**
* @defgroup c_addons_units_force Force
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsForce);
FLECS_API extern ECS_DECLARE(EcsNewton);
/** @} */
/**
* @defgroup c_addons_units_length Length
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsLength);
FLECS_API extern ECS_DECLARE(EcsMeters);
FLECS_API extern ECS_DECLARE(EcsPicoMeters);
FLECS_API extern ECS_DECLARE(EcsNanoMeters);
FLECS_API extern ECS_DECLARE(EcsMicroMeters);
FLECS_API extern ECS_DECLARE(EcsMilliMeters);
FLECS_API extern ECS_DECLARE(EcsCentiMeters);
FLECS_API extern ECS_DECLARE(EcsKiloMeters);
FLECS_API extern ECS_DECLARE(EcsMiles);
FLECS_API extern ECS_DECLARE(EcsPixels);
/** @} */
/**
* @defgroup c_addons_units_pressure Pressure
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsPressure);
FLECS_API extern ECS_DECLARE(EcsPascal);
FLECS_API extern ECS_DECLARE(EcsBar);
/** @} */
/**
* @defgroup c_addons_units_speed Speed
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsSpeed);
FLECS_API extern ECS_DECLARE(EcsMetersPerSecond);
FLECS_API extern ECS_DECLARE(EcsKiloMetersPerSecond);
FLECS_API extern ECS_DECLARE(EcsKiloMetersPerHour);
FLECS_API extern ECS_DECLARE(EcsMilesPerHour);
/** @} */
/**
* @defgroup c_addons_units_temperature Temperature
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsTemperature);
FLECS_API extern ECS_DECLARE(EcsKelvin);
FLECS_API extern ECS_DECLARE(EcsCelsius);
FLECS_API extern ECS_DECLARE(EcsFahrenheit);
/** @} */
/**
* @defgroup c_addons_units_data Data
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsData);
FLECS_API extern ECS_DECLARE(EcsBits);
FLECS_API extern ECS_DECLARE(EcsKiloBits);
FLECS_API extern ECS_DECLARE(EcsMegaBits);
FLECS_API extern ECS_DECLARE(EcsGigaBits);
FLECS_API extern ECS_DECLARE(EcsBytes);
FLECS_API extern ECS_DECLARE(EcsKiloBytes);
FLECS_API extern ECS_DECLARE(EcsMegaBytes);
FLECS_API extern ECS_DECLARE(EcsGigaBytes);
FLECS_API extern ECS_DECLARE(EcsKibiBytes);
FLECS_API extern ECS_DECLARE(EcsMebiBytes);
FLECS_API extern ECS_DECLARE(EcsGibiBytes);
/** @} */
/**
* @defgroup c_addons_units_datarate Data Rate
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsDataRate);
FLECS_API extern ECS_DECLARE(EcsBitsPerSecond);
FLECS_API extern ECS_DECLARE(EcsKiloBitsPerSecond);
FLECS_API extern ECS_DECLARE(EcsMegaBitsPerSecond);
FLECS_API extern ECS_DECLARE(EcsGigaBitsPerSecond);
FLECS_API extern ECS_DECLARE(EcsBytesPerSecond);
FLECS_API extern ECS_DECLARE(EcsKiloBytesPerSecond);
FLECS_API extern ECS_DECLARE(EcsMegaBytesPerSecond);
FLECS_API extern ECS_DECLARE(EcsGigaBytesPerSecond);
/** @} */
/**
* @defgroup c_addons_units_duration Duration
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsAngle);
FLECS_API extern ECS_DECLARE(EcsRadians);
FLECS_API extern ECS_DECLARE(EcsDegrees);
/** @} */
/**
* @defgroup c_addons_units_angle Angle
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsFrequency);
FLECS_API extern ECS_DECLARE(EcsHertz);
FLECS_API extern ECS_DECLARE(EcsKiloHertz);
FLECS_API extern ECS_DECLARE(EcsMegaHertz);
FLECS_API extern ECS_DECLARE(EcsGigaHertz);
/** @} */
/**
* @defgroup c_addons_units_uri Uri
* @ingroup c_addons_units
* @{
*/
FLECS_API extern ECS_DECLARE(EcsUri);
FLECS_API extern ECS_DECLARE(EcsUriHyperlink);
FLECS_API extern ECS_DECLARE(EcsUriImage);
FLECS_API extern ECS_DECLARE(EcsUriFile);
/** @} */
FLECS_API extern ECS_DECLARE(EcsAcceleration);
FLECS_API extern ECS_DECLARE(EcsPercentage);
FLECS_API extern ECS_DECLARE(EcsBel);
FLECS_API extern ECS_DECLARE(EcsDeciBel);
////////////////////////////////////////////////////////////////////////////////
//// Module
////////////////////////////////////////////////////////////////////////////////
FLECS_API
void FlecsUnitsImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_META
#ifdef FLECS_NO_META
#error "FLECS_NO_META failed: META is required by other addons"
#endif
/**
* @file addons/meta.h
* @brief Meta addon.
*
* The meta addon enables reflecting on component data. Types are stored as
* entities, with components that store the reflection data. A type has at least
* two components:
*
* - EcsComponent: core component, contains size & alignment
* - EcsMetaType: component that indicates what kind of type the entity is
*
* Additionally the type may have an additional component that contains the
* reflection data for the type. For example, structs have these components:
*
* - EcsComponent
* - EcsMetaType
* - EcsStruct
*
* Structs can be populated by adding child entities with the EcsMember
* component. Adding a child with a Member component to an entity will
* automatically add the EcsStruct component to the parent.
*
* Enums/bitmasks can be populated by adding child entities with the Constant
* tag. By default constants are automatically assigned values when they are
* added to the enum/bitmask. The parent entity must have the EcsEnum or
* EcsBitmask component before adding the constants.
*
* To create enum constants with a manual value, set (Constant, i32) to the
* desired value. To create bitmask constants with a manual value, set
* (Constant, u32) to the desired value. Constants with manual values should not
* conflict with other constants.
*
* The _init APIs are convenience wrappers around creating the entities and
* components for the types.
*
* When a type is created it automatically receives the EcsComponent and
* EcsMetaType components. The former means that the resulting type can be
* used as a regular component:
*
* @code
* // Create Position type
* ecs_entity_t pos = ecs_struct_init(world, &(ecs_struct_desc_t){
* .entity.name = "Position",
* .members = {
* {"x", ecs_id(ecs_f32_t)},
* {"y", ecs_id(ecs_f32_t)}
* }
* });
*
* // Create entity with Position component
* ecs_entity_t e = ecs_new_w_id(world, pos);
* @endcode
*
* Type entities do not have to be named.
*/
#ifdef FLECS_META
/**
* @defgroup c_addons_meta Meta
* @ingroup c_addons
* Flecs reflection framework.
*
* @{
*/
#include <stddef.h>
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifndef FLECS_META_H
#define FLECS_META_H
#ifdef __cplusplus
extern "C" {
#endif
#define ECS_MEMBER_DESC_CACHE_SIZE (32)
/** Primitive type definitions.
* These typedefs allow the builtin primitives to be used as regular components:
*
* @code
* ecs_set(world, e, ecs_i32_t, {10});
* @endcode
*
* Or a more useful example (create an enum constant with a manual value):
*
* @code
* ecs_set_pair_object(world, e, EcsConstant, ecs_i32_t, {10});
* @endcode
*/
typedef bool ecs_bool_t;
typedef char ecs_char_t;
typedef unsigned char ecs_byte_t;
typedef uint8_t ecs_u8_t;
typedef uint16_t ecs_u16_t;
typedef uint32_t ecs_u32_t;
typedef uint64_t ecs_u64_t;
typedef uintptr_t ecs_uptr_t;
typedef int8_t ecs_i8_t;
typedef int16_t ecs_i16_t;
typedef int32_t ecs_i32_t;
typedef int64_t ecs_i64_t;
typedef intptr_t ecs_iptr_t;
typedef float ecs_f32_t;
typedef double ecs_f64_t;
typedef char* ecs_string_t;
/* Meta module component ids */
FLECS_API extern const ecs_entity_t ecs_id(EcsMetaType);
FLECS_API extern const ecs_entity_t ecs_id(EcsMetaTypeSerialized);
FLECS_API extern const ecs_entity_t ecs_id(EcsPrimitive);
FLECS_API extern const ecs_entity_t ecs_id(EcsEnum);
FLECS_API extern const ecs_entity_t ecs_id(EcsBitmask);
FLECS_API extern const ecs_entity_t ecs_id(EcsMember);
FLECS_API extern const ecs_entity_t ecs_id(EcsMemberRanges);
FLECS_API extern const ecs_entity_t ecs_id(EcsStruct);
FLECS_API extern const ecs_entity_t ecs_id(EcsArray);
FLECS_API extern const ecs_entity_t ecs_id(EcsVector);
FLECS_API extern const ecs_entity_t ecs_id(EcsOpaque);
FLECS_API extern const ecs_entity_t ecs_id(EcsUnit);
FLECS_API extern const ecs_entity_t ecs_id(EcsUnitPrefix);
FLECS_API extern const ecs_entity_t EcsConstant;
FLECS_API extern const ecs_entity_t EcsQuantity;
/* Primitive type component ids */
FLECS_API extern const ecs_entity_t ecs_id(ecs_bool_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_char_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_byte_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_u8_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_u16_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_u32_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_u64_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_uptr_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_i8_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_i16_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_i32_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_i64_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_iptr_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_f32_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_f64_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_string_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_entity_t);
FLECS_API extern const ecs_entity_t ecs_id(ecs_id_t);
/** Type kinds supported by meta addon */
typedef enum ecs_type_kind_t {
EcsPrimitiveType,
EcsBitmaskType,
EcsEnumType,
EcsStructType,
EcsArrayType,
EcsVectorType,
EcsOpaqueType,
EcsTypeKindLast = EcsOpaqueType
} ecs_type_kind_t;
/** Component that is automatically added to every type with the right kind. */
typedef struct EcsMetaType {
ecs_type_kind_t kind;
bool existing; /**< Did the type exist or is it populated from reflection */
bool partial; /**< Is the reflection data a partial type description */
} EcsMetaType;
/** Primitive type kinds supported by meta addon */
typedef enum ecs_primitive_kind_t {
EcsBool = 1,
EcsChar,
EcsByte,
EcsU8,
EcsU16,
EcsU32,
EcsU64,
EcsI8,
EcsI16,
EcsI32,
EcsI64,
EcsF32,
EcsF64,
EcsUPtr,
EcsIPtr,
EcsString,
EcsEntity,
EcsId,
EcsPrimitiveKindLast = EcsId
} ecs_primitive_kind_t;
/** Component added to primitive types */
typedef struct EcsPrimitive {
ecs_primitive_kind_t kind;
} EcsPrimitive;
/** Component added to member entities */
typedef struct EcsMember {
ecs_entity_t type;
int32_t count;
ecs_entity_t unit;
int32_t offset;
} EcsMember;
/** Type expressing a range for a member value */
typedef struct ecs_member_value_range_t {
double min;
double max;
} ecs_member_value_range_t;
/** Component added to member entities to express valid value ranges */
typedef struct EcsMemberRanges {
ecs_member_value_range_t value;
ecs_member_value_range_t warning;
ecs_member_value_range_t error;
} EcsMemberRanges;
/** Element type of members vector in EcsStruct */
typedef struct ecs_member_t {
/** Must be set when used with ecs_struct_desc_t */
const char *name;
ecs_entity_t type;
/** May be set when used with ecs_struct_desc_t */
int32_t count;
int32_t offset;
/** May be set when used with ecs_struct_desc_t, will be auto-populated if
* type entity is also a unit */
ecs_entity_t unit;
/** Numerical range that specifies which values member can assume. This
* range may be used by UI elements such as a progress bar or slider. The
* value of a member should not exceed this range. */
ecs_member_value_range_t range;
/** Numerical range outside of which the value represents an error. This
* range may be used by UI elements to style a value. */
ecs_member_value_range_t error_range;
/** Numerical range outside of which the value represents an warning. This
* range may be used by UI elements to style a value. */
ecs_member_value_range_t warning_range;
/** Should not be set by ecs_struct_desc_t */
ecs_size_t size;
ecs_entity_t member;
} ecs_member_t;
/** Component added to struct type entities */
typedef struct EcsStruct {
/** Populated from child entities with Member component */
ecs_vec_t members; /* vector<ecs_member_t> */
} EcsStruct;
typedef struct ecs_enum_constant_t {
/** Must be set when used with ecs_enum_desc_t */
const char *name;
/** May be set when used with ecs_enum_desc_t */
int32_t value;
/** Should not be set by ecs_enum_desc_t */
ecs_entity_t constant;
} ecs_enum_constant_t;
/** Component added to enum type entities */
typedef struct EcsEnum {
/** Populated from child entities with Constant component */
ecs_map_t constants; /* map<i32_t, ecs_enum_constant_t> */
} EcsEnum;
typedef struct ecs_bitmask_constant_t {
/** Must be set when used with ecs_bitmask_desc_t */
const char *name;
/** May be set when used with ecs_bitmask_desc_t */
ecs_flags32_t value;
/** Should not be set by ecs_bitmask_desc_t */
ecs_entity_t constant;
} ecs_bitmask_constant_t;
/** Component added to bitmask type entities */
typedef struct EcsBitmask {
/* Populated from child entities with Constant component */
ecs_map_t constants; /* map<u32_t, ecs_bitmask_constant_t> */
} EcsBitmask;
/** Component added to array type entities */
typedef struct EcsArray {
ecs_entity_t type; /**< Element type */
int32_t count; /**< Number of elements */
} EcsArray;
/** Component added to vector type entities */
typedef struct EcsVector {
ecs_entity_t type; /**< Element type */
} EcsVector;
/* Opaque type support */
#if !defined(__cplusplus) || !defined(FLECS_CPP)
/** Serializer interface */
typedef struct ecs_serializer_t {
/* Serialize value */
int (*value)(
const struct ecs_serializer_t *ser, /**< Serializer */
ecs_entity_t type, /**< Type of the value to serialize */
const void *value); /**< Pointer to the value to serialize */
/* Serialize member */
int (*member)(
const struct ecs_serializer_t *ser, /**< Serializer */
const char *member); /**< Member name */
const ecs_world_t *world;
void *ctx;
} ecs_serializer_t;
#elif defined(__cplusplus)
} /* extern "C" { */
/** Serializer interface (same layout as C, but with convenience methods) */
typedef struct ecs_serializer_t {
/* Serialize value */
int (*value_)(
const struct ecs_serializer_t *ser,
ecs_entity_t type,
const void *value);
/* Serialize member */
int (*member_)(
const struct ecs_serializer_t *ser,
const char *name);
/* Serialize value */
int value(ecs_entity_t type, const void *value) const;
/* Serialize value */
template <typename T>
int value(const T& value) const;
/* Serialize member */
int member(const char *name) const;
const ecs_world_t *world;
void *ctx;
} ecs_serializer_t;
extern "C" {
#endif
/** Callback invoked serializing an opaque type. */
typedef int (*ecs_meta_serialize_t)(
const ecs_serializer_t *ser,
const void *src); /**< Pointer to value to serialize */
typedef struct EcsOpaque {
ecs_entity_t as_type; /**< Type that describes the serialized output */
ecs_meta_serialize_t serialize; /**< Serialize action */
/* Deserializer interface
* Only override the callbacks that are valid for the opaque type. If a
* deserializer attempts to assign a value type that is not supported by the
* interface, a conversion error is thrown.
*/
/** Assign bool value */
void (*assign_bool)(
void *dst,
bool value);
/** Assign char value */
void (*assign_char)(
void *dst,
char value);
/** Assign int value */
void (*assign_int)(
void *dst,
int64_t value);
/** Assign unsigned int value */
void (*assign_uint)(
void *dst,
uint64_t value);
/** Assign float value */
void (*assign_float)(
void *dst,
double value);
/** Assign string value */
void (*assign_string)(
void *dst,
const char *value);
/** Assign entity value */
void (*assign_entity)(
void *dst,
ecs_world_t *world,
ecs_entity_t entity);
/** Assign (component) id value */
void (*assign_id)(
void *dst,
ecs_world_t *world,
ecs_id_t id);
/** Assign null value */
void (*assign_null)(
void *dst);
/** Clear collection elements */
void (*clear)(
void *dst);
/** Ensure & get collection element */
void* (*ensure_element)(
void *dst,
size_t elem);
/** Ensure & get element */
void* (*ensure_member)(
void *dst,
const char *member);
/** Return number of elements */
size_t (*count)(
const void *dst);
/** Resize to number of elements */
void (*resize)(
void *dst,
size_t count);
} EcsOpaque;
/* Units */
/* Helper type to describe translation between two units. Note that this
* is not intended as a generic approach to unit conversions (e.g. from celsius
* to fahrenheit) but to translate between units that derive from the same base
* (e.g. meters to kilometers).
*
* Note that power is applied to the factor. When describing a translation of
* 1000, either use {factor = 1000, power = 1} or {factor = 1, power = 3}. */
typedef struct ecs_unit_translation_t {
int32_t factor; /**< Factor to apply (e.g. "1000", "1000000", "1024") */
int32_t power; /**< Power to apply to factor (e.g. "1", "3", "-9") */
} ecs_unit_translation_t;
typedef struct EcsUnit {
char *symbol;
ecs_entity_t prefix; /**< Order of magnitude prefix relative to derived */
ecs_entity_t base; /**< Base unit (e.g. "meters") */
ecs_entity_t over; /**< Over unit (e.g. "per second") */
ecs_unit_translation_t translation; /**< Translation for derived unit */
} EcsUnit;
typedef struct EcsUnitPrefix {
char *symbol; /**< Symbol of prefix (e.g. "K", "M", "Ki") */
ecs_unit_translation_t translation; /**< Translation of prefix */
} EcsUnitPrefix;
/* Serializer utilities */
typedef enum ecs_meta_type_op_kind_t {
EcsOpArray,
EcsOpVector,
EcsOpOpaque,
EcsOpPush,
EcsOpPop,
EcsOpScope, /**< Marks last constant that can open/close a scope */
EcsOpEnum,
EcsOpBitmask,
EcsOpPrimitive, /**< Marks first constant that's a primitive */
EcsOpBool,
EcsOpChar,
EcsOpByte,
EcsOpU8,
EcsOpU16,
EcsOpU32,
EcsOpU64,
EcsOpI8,
EcsOpI16,
EcsOpI32,
EcsOpI64,
EcsOpF32,
EcsOpF64,
EcsOpUPtr,
EcsOpIPtr,
EcsOpString,
EcsOpEntity,
EcsOpId,
EcsMetaTypeOpKindLast = EcsOpId
} ecs_meta_type_op_kind_t;
typedef struct ecs_meta_type_op_t {
ecs_meta_type_op_kind_t kind;
ecs_size_t offset; /**< Offset of current field */
int32_t count;
const char *name; /**< Name of value (only used for struct members) */
int32_t op_count; /**< Number of operations until next field or end */
ecs_size_t size; /**< Size of type of operation */
ecs_entity_t type; /**< Type entity */
int32_t member_index; /**< Index of member in struct */
ecs_hashmap_t *members; /**< string -> member index (structs only) */
} ecs_meta_type_op_t;
typedef struct EcsMetaTypeSerialized {
ecs_vec_t ops; /**< vector<ecs_meta_type_op_t> */
} EcsMetaTypeSerialized;
/* Deserializer utilities */
#define ECS_META_MAX_SCOPE_DEPTH (32) /* >32 levels of nesting is not sane */
typedef struct ecs_meta_scope_t {
ecs_entity_t type; /**< The type being iterated */
ecs_meta_type_op_t *ops; /**< The type operations (see ecs_meta_type_op_t) */
int32_t op_count; /**< Number of operations in ops array to process */
int32_t op_cur; /**< Current operation */
int32_t elem_cur; /**< Current element (for collections) */
int32_t prev_depth; /**< Depth to restore, in case dotmember was used */
void *ptr; /**< Pointer to the value being iterated */
const EcsComponent *comp; /**< Pointer to component, in case size/alignment is needed */
const EcsOpaque *opaque; /**< Opaque type interface */
ecs_vec_t *vector; /**< Current vector, in case a vector is iterated */
ecs_hashmap_t *members; /**< string -> member index */
bool is_collection; /**< Is the scope iterating elements? */
bool is_inline_array; /**< Is the scope iterating an inline array? */
bool is_empty_scope; /**< Was scope populated (for collections) */
} ecs_meta_scope_t;
/** Type that enables iterating/populating a value using reflection data */
typedef struct ecs_meta_cursor_t {
const ecs_world_t *world;
ecs_meta_scope_t scope[ECS_META_MAX_SCOPE_DEPTH];
int32_t depth;
bool valid;
bool is_primitive_scope; /**< If in root scope, this allows for a push for primitive types */
/* Custom entity lookup action for overriding default ecs_lookup_fullpath */
ecs_entity_t (*lookup_action)(const ecs_world_t*, const char*, void*);
void *lookup_ctx;
} ecs_meta_cursor_t;
FLECS_API
ecs_meta_cursor_t ecs_meta_cursor(
const ecs_world_t *world,
ecs_entity_t type,
void *ptr);
/** Get pointer to current field */
FLECS_API
void* ecs_meta_get_ptr(
ecs_meta_cursor_t *cursor);
/** Move cursor to next field */
FLECS_API
int ecs_meta_next(
ecs_meta_cursor_t *cursor);
/** Move cursor to a element */
FLECS_API
int ecs_meta_elem(
ecs_meta_cursor_t *cursor,
int32_t elem);
/** Move cursor to member */
FLECS_API
int ecs_meta_member(
ecs_meta_cursor_t *cursor,
const char *name);
/** Move cursor to member, supports dot-separated nested members */
FLECS_API
int ecs_meta_dotmember(
ecs_meta_cursor_t *cursor,
const char *name);
/** Push a scope (required/only valid for structs & collections) */
FLECS_API
int ecs_meta_push(
ecs_meta_cursor_t *cursor);
/** Pop a struct or collection scope (must follow a push) */
FLECS_API
int ecs_meta_pop(
ecs_meta_cursor_t *cursor);
/** Is the current scope a collection? */
FLECS_API
bool ecs_meta_is_collection(
const ecs_meta_cursor_t *cursor);
/** Get type of current element. */
FLECS_API
ecs_entity_t ecs_meta_get_type(
const ecs_meta_cursor_t *cursor);
/** Get unit of current element. */
FLECS_API
ecs_entity_t ecs_meta_get_unit(
const ecs_meta_cursor_t *cursor);
/** Get member name of current member */
FLECS_API
const char* ecs_meta_get_member(
const ecs_meta_cursor_t *cursor);
/** Get member entity of current member */
FLECS_API
ecs_entity_t ecs_meta_get_member_id(
const ecs_meta_cursor_t *cursor);
/* The set functions assign the field with the specified value. If the value
* does not have the same type as the field, it will be cased to the field type.
* If no valid conversion is available, the operation will fail. */
/** Set field with boolean value */
FLECS_API
int ecs_meta_set_bool(
ecs_meta_cursor_t *cursor,
bool value);
/** Set field with char value */
FLECS_API
int ecs_meta_set_char(
ecs_meta_cursor_t *cursor,
char value);
/** Set field with int value */
FLECS_API
int ecs_meta_set_int(
ecs_meta_cursor_t *cursor,
int64_t value);
/** Set field with uint value */
FLECS_API
int ecs_meta_set_uint(
ecs_meta_cursor_t *cursor,
uint64_t value);
/** Set field with float value */
FLECS_API
int ecs_meta_set_float(
ecs_meta_cursor_t *cursor,
double value);
/** Set field with string value */
FLECS_API
int ecs_meta_set_string(
ecs_meta_cursor_t *cursor,
const char *value);
/** Set field with string literal value (has enclosing "") */
FLECS_API
int ecs_meta_set_string_literal(
ecs_meta_cursor_t *cursor,
const char *value);
/** Set field with entity value */
FLECS_API
int ecs_meta_set_entity(
ecs_meta_cursor_t *cursor,
ecs_entity_t value);
/** Set field with (component) id value */
FLECS_API
int ecs_meta_set_id(
ecs_meta_cursor_t *cursor,
ecs_id_t value);
/** Set field with (component) id value */
FLECS_API
int ecs_meta_set_component(
ecs_meta_cursor_t *cursor,
ecs_id_t value);
/** Set field with null value */
FLECS_API
int ecs_meta_set_null(
ecs_meta_cursor_t *cursor);
/** Set field with dynamic value */
FLECS_API
int ecs_meta_set_value(
ecs_meta_cursor_t *cursor,
const ecs_value_t *value);
/* Functions for getting members. */
/** Get field value as boolean. */
FLECS_API
bool ecs_meta_get_bool(
const ecs_meta_cursor_t *cursor);
/** Get field value as char. */
FLECS_API
char ecs_meta_get_char(
const ecs_meta_cursor_t *cursor);
/** Get field value as signed integer. */
FLECS_API
int64_t ecs_meta_get_int(
const ecs_meta_cursor_t *cursor);
/** Get field value as unsigned integer. */
FLECS_API
uint64_t ecs_meta_get_uint(
const ecs_meta_cursor_t *cursor);
/** Get field value as float. */
FLECS_API
double ecs_meta_get_float(
const ecs_meta_cursor_t *cursor);
/** Get field value as string.
* This operation does not perform conversions. If the field is not a string,
* this operation will fail.
*/
FLECS_API
const char* ecs_meta_get_string(
const ecs_meta_cursor_t *cursor);
/** Get field value as entity.
* This operation does not perform conversions. */
FLECS_API
ecs_entity_t ecs_meta_get_entity(
const ecs_meta_cursor_t *cursor);
/** Get field value as (component) id.
* This operation can convert from an entity. */
ecs_id_t ecs_meta_get_id(
const ecs_meta_cursor_t *cursor);
/** Convert pointer of primitive kind to float. */
FLECS_API
double ecs_meta_ptr_to_float(
ecs_primitive_kind_t type_kind,
const void *ptr);
/* API functions for creating meta types */
/** Used with ecs_primitive_init(). */
typedef struct ecs_primitive_desc_t {
ecs_entity_t entity; /**< Existing entity to use for type (optional) */
ecs_primitive_kind_t kind;
} ecs_primitive_desc_t;
/** Create a new primitive type */
FLECS_API
ecs_entity_t ecs_primitive_init(
ecs_world_t *world,
const ecs_primitive_desc_t *desc);
/** Used with ecs_enum_init(). */
typedef struct ecs_enum_desc_t {
ecs_entity_t entity; /**< Existing entity to use for type (optional) */
ecs_enum_constant_t constants[ECS_MEMBER_DESC_CACHE_SIZE];
} ecs_enum_desc_t;
/** Create a new enum type */
FLECS_API
ecs_entity_t ecs_enum_init(
ecs_world_t *world,
const ecs_enum_desc_t *desc);
/** Used with ecs_bitmask_init(). */
typedef struct ecs_bitmask_desc_t {
ecs_entity_t entity; /**< Existing entity to use for type (optional) */
ecs_bitmask_constant_t constants[ECS_MEMBER_DESC_CACHE_SIZE];
} ecs_bitmask_desc_t;
/** Create a new bitmask type */
FLECS_API
ecs_entity_t ecs_bitmask_init(
ecs_world_t *world,
const ecs_bitmask_desc_t *desc);
/** Used with ecs_array_init(). */
typedef struct ecs_array_desc_t {
ecs_entity_t entity; /**< Existing entity to use for type (optional) */
ecs_entity_t type;
int32_t count;
} ecs_array_desc_t;
/** Create a new array type */
FLECS_API
ecs_entity_t ecs_array_init(
ecs_world_t *world,
const ecs_array_desc_t *desc);
/** Used with ecs_vector_init(). */
typedef struct ecs_vector_desc_t {
ecs_entity_t entity; /**< Existing entity to use for type (optional) */
ecs_entity_t type;
} ecs_vector_desc_t;
/** Create a new vector type */
FLECS_API
ecs_entity_t ecs_vector_init(
ecs_world_t *world,
const ecs_vector_desc_t *desc);
/** Used with ecs_struct_init(). */
typedef struct ecs_struct_desc_t {
ecs_entity_t entity; /**< Existing entity to use for type (optional) */
ecs_member_t members[ECS_MEMBER_DESC_CACHE_SIZE];
} ecs_struct_desc_t;
/** Create a new struct type */
FLECS_API
ecs_entity_t ecs_struct_init(
ecs_world_t *world,
const ecs_struct_desc_t *desc);
/** Used with ecs_opaque_init(). */
typedef struct ecs_opaque_desc_t {
ecs_entity_t entity;
EcsOpaque type;
} ecs_opaque_desc_t;
/** Create a new opaque type.
* Opaque types are types of which the layout doesn't match what can be modelled
* with the primitives of the meta framework, but which have a structure
* that can be described with meta primitives. Typical examples are STL types
* such as std::string or std::vector, types with a nontrivial layout, and types
* that only expose getter/setter methods.
*
* An opaque type is a combination of a serialization function, and a handle to
* a meta type which describes the structure of the serialized output. For
* example, an opaque type for std::string would have a serializer function that
* accesses .c_str(), and with type ecs_string_t.
*
* The serializer callback accepts a serializer object and a pointer to the
* value of the opaque type to be serialized. The serializer has two methods:
*
* - value, which serializes a value (such as .c_str())
* - member, which specifies a member to be serialized (in the case of a struct)
*/
FLECS_API
ecs_entity_t ecs_opaque_init(
ecs_world_t *world,
const ecs_opaque_desc_t *desc);
/** Used with ecs_unit_init(). */
typedef struct ecs_unit_desc_t {
/** Existing entity to associate with unit (optional) */
ecs_entity_t entity;
/** Unit symbol, e.g. "m", "%", "g". (optional) */
const char *symbol;
/** Unit quantity, e.g. distance, percentage, weight. (optional) */
ecs_entity_t quantity;
/** Base unit, e.g. "meters" (optional) */
ecs_entity_t base;
/** Over unit, e.g. "per second" (optional) */
ecs_entity_t over;
/** Translation to apply to derived unit (optional) */
ecs_unit_translation_t translation;
/** Prefix indicating order of magnitude relative to the derived unit. If set
* together with "translation", the values must match. If translation is not
* set, setting prefix will auto-populate it.
* Additionally, setting the prefix will enforce that the symbol (if set)
* is consistent with the prefix symbol + symbol of the derived unit. If the
* symbol is not set, it will be auto populated. */
ecs_entity_t prefix;
} ecs_unit_desc_t;
/** Create a new unit */
FLECS_API
ecs_entity_t ecs_unit_init(
ecs_world_t *world,
const ecs_unit_desc_t *desc);
/** Used with ecs_unit_prefix_init(). */
typedef struct ecs_unit_prefix_desc_t {
/** Existing entity to associate with unit prefix (optional) */
ecs_entity_t entity;
/** Unit symbol, e.g. "m", "%", "g". (optional) */
const char *symbol;
/** Translation to apply to derived unit (optional) */
ecs_unit_translation_t translation;
} ecs_unit_prefix_desc_t;
/** Create a new unit prefix */
FLECS_API
ecs_entity_t ecs_unit_prefix_init(
ecs_world_t *world,
const ecs_unit_prefix_desc_t *desc);
/** Create a new quantity */
FLECS_API
ecs_entity_t ecs_quantity_init(
ecs_world_t *world,
const ecs_entity_desc_t *desc);
/* Convenience macros */
#define ecs_primitive(world, ...)\
ecs_primitive_init(world, &(ecs_primitive_desc_t) __VA_ARGS__ )
#define ecs_enum(world, ...)\
ecs_enum_init(world, &(ecs_enum_desc_t) __VA_ARGS__ )
#define ecs_bitmask(world, ...)\
ecs_bitmask_init(world, &(ecs_bitmask_desc_t) __VA_ARGS__ )
#define ecs_array(world, ...)\
ecs_array_init(world, &(ecs_array_desc_t) __VA_ARGS__ )
#define ecs_vector(world, ...)\
ecs_vector_init(world, &(ecs_vector_desc_t) __VA_ARGS__ )
#define ecs_opaque(world, ...)\
ecs_opaque_init(world, &(ecs_opaque_desc_t) __VA_ARGS__ )
#define ecs_struct(world, ...)\
ecs_struct_init(world, &(ecs_struct_desc_t) __VA_ARGS__ )
#define ecs_unit(world, ...)\
ecs_unit_init(world, &(ecs_unit_desc_t) __VA_ARGS__ )
#define ecs_unit_prefix(world, ...)\
ecs_unit_prefix_init(world, &(ecs_unit_prefix_desc_t) __VA_ARGS__ )
#define ecs_quantity(world, ...)\
ecs_quantity_init(world, &(ecs_entity_desc_t) __VA_ARGS__ )
/* Module import */
FLECS_API
void FlecsMetaImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_EXPR
#ifdef FLECS_NO_EXPR
#error "FLECS_NO_EXPR failed: EXPR is required by other addons"
#endif
/**
* @file addons/expr.h
* @brief Flecs expression parser addon.
*
* Parse expression strings into component values. The notation is similar to
* JSON but with a smaller footprint, native support for (large) integer types,
* character types, enumerations, bitmasks and entity identifiers.
*
* Examples:
*
* Member names:
*
* {x: 10, y: 20}
*
* No member names (uses member ordering):
*
* {10, 20}
*
* Enum values:
*
* {color: Red}
*
* Bitmask values:
*
* {toppings: Lettuce|Tomato}
*
* Collections:
*
* {points: [10, 20, 30]}
*
* Nested objects:
*
* {start: {x: 10, y: 20}, stop: {x: 30, y: 40}}
*
*/
#ifdef FLECS_EXPR
#ifndef FLECS_META
#define FLECS_META
#endif
#ifndef FLECS_PARSER
#define FLECS_PARSER
#endif
#ifndef FLECS_EXPR_H
#define FLECS_EXPR_H
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup c_addons_expr Expr
* @ingroup c_addons
* Serialize/deserialize values to string.
*
* @{
*/
/** Write an escaped character.
* Write a character to an output string, insert escape character if necessary.
*
* @param out The string to write the character to.
* @param in The input character.
* @param delimiter The delimiter used (for example '"')
* @return Pointer to the character after the last one written.
*/
FLECS_API
char* ecs_chresc(
char *out,
char in,
char delimiter);
/** Parse an escaped character.
* Parse a character with a potential escape sequence.
*
* @param in Pointer to character in input string.
* @param out Output string.
* @return Pointer to the character after the last one read.
*/
const char* ecs_chrparse(
const char *in,
char *out);
/** Write an escaped string.
* Write an input string to an output string, escape characters where necessary.
* To determine the size of the output string, call the operation with a NULL
* argument for 'out', and use the returned size to allocate a string that is
* large enough.
*
* @param out Pointer to output string (must be).
* @param size Maximum number of characters written to output.
* @param delimiter The delimiter used (for example '"').
* @param in The input string.
* @return The number of characters that (would) have been written.
*/
FLECS_API
ecs_size_t ecs_stresc(
char *out,
ecs_size_t size,
char delimiter,
const char *in);
/** Return escaped string.
* Return escaped version of input string. Same as ecs_stresc(), but returns an
* allocated string of the right size.
*
* @param delimiter The delimiter used (for example '"').
* @param in The input string.
* @return Escaped string.
*/
FLECS_API
char* ecs_astresc(
char delimiter,
const char *in);
/** Storage for parser variables. Variables make it possible to parameterize
* expression strings, and are referenced with the $ operator (e.g. $var). */
typedef struct ecs_expr_var_t {
char *name;
ecs_value_t value;
bool owned; /* Set to false if ecs_vars_t should not take ownership of var */
} ecs_expr_var_t;
typedef struct ecs_expr_var_scope_t {
ecs_hashmap_t var_index;
ecs_vec_t vars;
struct ecs_expr_var_scope_t *parent;
} ecs_expr_var_scope_t;
typedef struct ecs_vars_t {
ecs_world_t *world;
ecs_expr_var_scope_t root;
ecs_expr_var_scope_t *cur;
} ecs_vars_t;
/** Init variable storage */
FLECS_API
void ecs_vars_init(
ecs_world_t *world,
ecs_vars_t *vars);
/** Cleanup variable storage */
FLECS_API
void ecs_vars_fini(
ecs_vars_t *vars);
/** Push variable scope */
FLECS_API
void ecs_vars_push(
ecs_vars_t *vars);
/** Pop variable scope */
FLECS_API
int ecs_vars_pop(
ecs_vars_t *vars);
/** Declare variable in current scope */
FLECS_API
ecs_expr_var_t* ecs_vars_declare(
ecs_vars_t *vars,
const char *name,
ecs_entity_t type);
/** Declare variable in current scope from value.
* This operation takes ownership of the value. The value pointer must be
* allocated with ecs_value_new().
*/
FLECS_API
ecs_expr_var_t* ecs_vars_declare_w_value(
ecs_vars_t *vars,
const char *name,
ecs_value_t *value);
/** Lookup variable in scope and parent scopes */
FLECS_API
ecs_expr_var_t* ecs_vars_lookup(
const ecs_vars_t *vars,
const char *name);
/** Used with ecs_parse_expr(). */
typedef struct ecs_parse_expr_desc_t {
const char *name;
const char *expr;
ecs_entity_t (*lookup_action)(
const ecs_world_t*,
const char *value,
void *ctx);
void *lookup_ctx;
ecs_vars_t *vars;
} ecs_parse_expr_desc_t;
/** Parse expression into value.
* This operation parses a flecs expression into the provided pointer. The
* memory pointed to must be large enough to contain a value of the used type.
*
* If no type and pointer are provided for the value argument, the operation
* will discover the type from the expression and allocate storage for the
* value. The allocated value must be freed with ecs_value_free().
*
* @param world The world.
* @param ptr The pointer to the expression to parse.
* @param value The value containing type & pointer to write to.
* @param desc Configuration parameters for deserializer.
* @return Pointer to the character after the last one read, or NULL if failed.
*/
FLECS_API
const char* ecs_parse_expr(
ecs_world_t *world,
const char *ptr,
ecs_value_t *value,
const ecs_parse_expr_desc_t *desc);
/** Serialize value into expression string.
* This operation serializes a value of the provided type to a string. The
* memory pointed to must be large enough to contain a value of the used type.
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @return String with expression, or NULL if failed.
*/
FLECS_API
char* ecs_ptr_to_expr(
const ecs_world_t *world,
ecs_entity_t type,
const void *data);
/** Serialize value into expression buffer.
* Same as ecs_ptr_to_expr(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @param buf The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_ptr_to_expr_buf(
const ecs_world_t *world,
ecs_entity_t type,
const void *data,
ecs_strbuf_t *buf);
/** Similar as ecs_ptr_to_expr(), but serializes values to string.
* Whereas the output of ecs_ptr_to_expr() is a valid expression, the output of
* ecs_ptr_to_str() is a string representation of the value. In most cases the
* output of the two operations is the same, but there are some differences:
* - Strings are not quoted
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @return String with result, or NULL if failed.
*/
FLECS_API
char* ecs_ptr_to_str(
const ecs_world_t *world,
ecs_entity_t type,
const void *data);
/** Serialize value into string buffer.
* Same as ecs_ptr_to_str(), but serializes to an ecs_strbuf_t instance.
*
* @param world The world.
* @param type The type of the value to serialize.
* @param data The value to serialize.
* @param buf The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_ptr_to_str_buf(
const ecs_world_t *world,
ecs_entity_t type,
const void *data,
ecs_strbuf_t *buf);
/** Serialize primitive value into string buffer.
* Serializes a primitive value to an ecs_strbuf_t instance. This operation can
* be reused by other serializers to avoid having to write boilerplate code that
* serializes primitive values to a string.
*
* @param world The world.
* @param kind The kind of primitive value.
* @param data The value to serialize
* @param buf The strbuf to append the string to.
* @return Zero if success, non-zero if failed.
*/
FLECS_API
int ecs_primitive_to_expr_buf(
const ecs_world_t *world,
ecs_primitive_kind_t kind,
const void *data,
ecs_strbuf_t *buf);
/** Parse expression token.
* Expression tokens can contain more characters (such as '|') than tokens
* parsed by the query (term) parser.
*
* @param name The name of the expression (used for debug logs).
* @param expr The full expression (used for debug logs).
* @param ptr The pointer to the expression to parse.
* @param token The buffer to write to (must have size ECS_MAX_TOKEN_SIZE)
* @return Pointer to the character after the last one read, or NULL if failed.
*/
FLECS_API
const char *ecs_parse_expr_token(
const char *name,
const char *expr,
const char *ptr,
char *token);
/** Evaluate interpolated expressions in string.
* This operation evaluates expressions in a string, and replaces them with
* their evaluated result. Supported expression formats are:
* - $variable_name
* - {expression}
*
* The $, { and } characters can be escaped with a backslash (\).
*
* @param world The world.
* @param str The string to evaluate.
* @param vars The variables to use for evaluation.
*/
FLECS_API
char* ecs_interpolate_string(
ecs_world_t *world,
const char *str,
const ecs_vars_t *vars);
/** Convert iterator to vars
* This operation converts an iterator to a variable array. This allows for
* using iterator results in expressions. The operation only converts a
* single result at a time, and does not progress the iterator.
*
* Iterator fields with data will be made available as variables with as name
* the field index (e.g. "$1"). The operation does not check if reflection data
* is registered for a field type. If no reflection data is registered for the
* type, using the field variable in expressions will fail.
*
* Field variables will only contain single elements, even if the iterator
* returns component arrays. The offset parameter can be used to specify which
* element in the component arrays to return. The offset parameter must be
* smaller than it->count.
*
* The operation will create a variable for query variables that contain a
* single entity.
*
* The operation will attempt to use existing variables. If a variable does not
* yet exist, the operation will create it. If an existing variable exists with
* a mismatching type, the operation will fail.
*
* Accessing variables after progressing the iterator or after the iterator is
* destroyed will result in undefined behavior.
*
* If vars contains a variable that is not present in the iterator, the variable
* will not be modified.
*
* @param it The iterator to convert to variables.
* @param vars The variables to write to.
* @param offset The offset to the current element.
*/
FLECS_API
void ecs_iter_to_vars(
const ecs_iter_t *it,
ecs_vars_t *vars,
int offset);
/** @} */
#ifdef __cplusplus
}
#endif
#endif
#endif
#endif
#ifdef FLECS_META_C
#ifdef FLECS_NO_META_C
#error "FLECS_NO_META_C failed: META_C is required by other addons"
#endif
/**
* @file addons/meta_c.h
* @brief Utility macros for populating reflection data in C.
*/
#ifdef FLECS_META_C
/**
* @defgroup c_addons_meta_c Meta Utilities
* @ingroup c_addons
* Macro utilities to automatically insert reflection data.
*
* @{
*/
#ifndef FLECS_META
#define FLECS_META
#endif
#ifndef FLECS_PARSER
#define FLECS_PARSER
#endif
#ifndef FLECS_META_C_H
#define FLECS_META_C_H
#ifdef __cplusplus
extern "C" {
#endif
/* Macro that controls behavior of API. Usually set in module header. When the
* macro is not defined, it defaults to IMPL. */
/* Define variables used by reflection utilities. This should only be defined
* by the module itself, not by the code importing the module */
/* #define ECS_META_IMPL IMPL */
/* Don't define variables used by reflection utilities but still declare the
* variable for the component id. This enables the reflection utilities to be
* used for global component variables, even if no reflection is used. */
/* #define ECS_META_IMPL DECLARE */
/* Don't define variables used by reflection utilities. This generates an extern
* variable for the component identifier. */
/* #define ECS_META_IMPL EXTERN */
/** Declare component with descriptor */
#define ECS_META_COMPONENT(world, name)\
ECS_COMPONENT_DEFINE(world, name);\
ecs_meta_from_desc(world, ecs_id(name),\
FLECS__##name##_kind, FLECS__##name##_desc)
/** ECS_STRUCT(name, body) */
#define ECS_STRUCT(name, ...)\
ECS_META_IMPL_CALL(ECS_STRUCT_, ECS_META_IMPL, name, #__VA_ARGS__);\
ECS_STRUCT_TYPE(name, __VA_ARGS__)
/** ECS_ENUM(name, body) */
#define ECS_ENUM(name, ...)\
ECS_META_IMPL_CALL(ECS_ENUM_, ECS_META_IMPL, name, #__VA_ARGS__);\
ECS_ENUM_TYPE(name, __VA_ARGS__)
/** ECS_BITMASK(name, body) */
#define ECS_BITMASK(name, ...)\
ECS_META_IMPL_CALL(ECS_BITMASK_, ECS_META_IMPL, name, #__VA_ARGS__);\
ECS_ENUM_TYPE(name, __VA_ARGS__)
/** Macro used to mark part of type for which no reflection data is created */
#define ECS_PRIVATE
/** Populate meta information from type descriptor. */
FLECS_API
int ecs_meta_from_desc(
ecs_world_t *world,
ecs_entity_t component,
ecs_type_kind_t kind,
const char *desc);
/* Private API */
/* Utilities to switch between IMPL, DECLARE and EXTERN variants */
#define ECS_META_IMPL_CALL_INNER(base, impl, name, type_desc)\
base ## impl(name, type_desc)
#define ECS_META_IMPL_CALL(base, impl, name, type_desc)\
ECS_META_IMPL_CALL_INNER(base, impl, name, type_desc)
/* ECS_STRUCT implementation */
#define ECS_STRUCT_TYPE(name, ...)\
typedef struct __VA_ARGS__ name
#define ECS_STRUCT_ECS_META_IMPL ECS_STRUCT_IMPL
#define ECS_STRUCT_IMPL(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name);\
static const char *FLECS__##name##_desc = type_desc;\
static ecs_type_kind_t FLECS__##name##_kind = EcsStructType;\
ECS_COMPONENT_DECLARE(name) = 0
#define ECS_STRUCT_DECLARE(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name);\
ECS_COMPONENT_DECLARE(name) = 0
#define ECS_STRUCT_EXTERN(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name)
/* ECS_ENUM implementation */
#define ECS_ENUM_TYPE(name, ...)\
typedef enum __VA_ARGS__ name
#define ECS_ENUM_ECS_META_IMPL ECS_ENUM_IMPL
#define ECS_ENUM_IMPL(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name);\
static const char *FLECS__##name##_desc = type_desc;\
static ecs_type_kind_t FLECS__##name##_kind = EcsEnumType;\
ECS_COMPONENT_DECLARE(name) = 0
#define ECS_ENUM_DECLARE(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name);\
ECS_COMPONENT_DECLARE(name) = 0
#define ECS_ENUM_EXTERN(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name)
/* ECS_BITMASK implementation */
#define ECS_BITMASK_TYPE(name, ...)\
typedef enum __VA_ARGS__ name
#define ECS_BITMASK_ECS_META_IMPL ECS_BITMASK_IMPL
#define ECS_BITMASK_IMPL(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name);\
static const char *FLECS__##name##_desc = type_desc;\
static ecs_type_kind_t FLECS__##name##_kind = EcsBitmaskType;\
ECS_COMPONENT_DECLARE(name) = 0
#define ECS_BITMASK_DECLARE(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name);\
ECS_COMPONENT_DECLARE(name) = 0
#define ECS_BITMASK_EXTERN(name, type_desc)\
extern ECS_COMPONENT_DECLARE(name)
#ifdef __cplusplus
}
#endif
#endif // FLECS_META_C_H
/** @} */
#endif // FLECS_META_C
#endif
#ifdef FLECS_PLECS
#ifdef FLECS_NO_PLECS
#error "FLECS_NO_PLECS failed: PLECS is required by other addons"
#endif
/**
* @file addons/plecs.h
* @brief Flecs script module.
*
* For script, see examples/plecs.
*/
#ifdef FLECS_PLECS
/**
* @defgroup c_addons_plecs Flecs script
* @ingroup c_addons
* Data definition format for loading entity data.
*
* @{
*/
#ifndef FLECS_MODULE
#define FLECS_MODULE
#endif
#ifndef FLECS_PARSER
#define FLECS_PARSER
#endif
#ifndef FLECS_EXPR
#define FLECS_EXPR
#endif
#ifndef FLECS_PLECS_H
#define FLECS_PLECS_H
#ifdef __cplusplus
extern "C" {
#endif
FLECS_API
extern ECS_COMPONENT_DECLARE(EcsScript);
/* Script component */
typedef struct EcsScript {
ecs_vec_t using_;
char *script;
ecs_vec_t prop_defaults;
ecs_world_t *world;
} EcsScript;
/** Parse plecs string.
* This parses a plecs string and instantiates the entities in the world.
*
* @param world The world.
* @param name The script name (typically the file).
* @param str The plecs string.
* @return Zero if success, non-zero otherwise.
*/
FLECS_API
int ecs_plecs_from_str(
ecs_world_t *world,
const char *name,
const char *str);
/** Parse plecs file.
* This parses a plecs file and instantiates the entities in the world. This
* operation is equivalent to loading the file contents and passing it to
* ecs_plecs_from_str().
*
* @param world The world.
* @param filename The plecs file name.
* @return Zero if success, non-zero otherwise.
*/
FLECS_API
int ecs_plecs_from_file(
ecs_world_t *world,
const char *filename);
/** Used with ecs_script_init() */
typedef struct ecs_script_desc_t {
ecs_entity_t entity; /* Set to customize entity handle associated with script */
const char *filename; /* Set to load script from file */
const char *str; /* Set to parse script from string */
} ecs_script_desc_t;
/** Load managed script.
* A managed script tracks which entities it creates, and keeps those entities
* synchronized when the contents of the script are updated. When the script is
* updated, entities that are no longer in the new version will be deleted.
*
* This feature is experimental.
*
* @param world The world.
* @param desc Script descriptor.
*/
FLECS_API
ecs_entity_t ecs_script_init(
ecs_world_t *world,
const ecs_script_desc_t *desc);
#define ecs_script(world, ...)\
ecs_script_init(world, &(ecs_script_desc_t) __VA_ARGS__)
/** Update script with new code.
*
* @param world The world.
* @param script The script entity.
* @param instance An assembly instance (optional).
* @param str The script code.
* @param vars Optional preset variables for script parameterization.
*/
FLECS_API
int ecs_script_update(
ecs_world_t *world,
ecs_entity_t script,
ecs_entity_t instance,
const char *str,
ecs_vars_t *vars);
/** Clear all entities associated with script.
*
* @param world The world.
* @param script The script entity.
* @param instance The script instance.
*/
FLECS_API
void ecs_script_clear(
ecs_world_t *world,
ecs_entity_t script,
ecs_entity_t instance);
/* Module import */
FLECS_API
void FlecsScriptImport(
ecs_world_t *world);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_RULES
#ifdef FLECS_NO_RULES
#error "FLECS_NO_RULES failed: RULES is required by other addons"
#endif
/**
* @file addons/rules.h
* @brief Rule query engine addon.
*
* Rules are advanced queries that in addition to the capabilities of regular
* queries and filters have the following features:
*
* - query for all components of an entity (vs. all entities for a component)
* - query for all relationship pairs of an entity
* - support for query variables that are resolved at evaluation time
* - automatic traversal of transitive relationships
*/
#ifdef FLECS_RULES
/**
* @defgroup c_addons_rules Rules
* @ingroup c_addons
* Rules are an advanced query engine for matching against entity graphs.
*
* @{
*/
#ifndef FLECS_RULES_H
#define FLECS_RULES_H
#ifdef __cplusplus
extern "C" {
#endif
/** Convenience macro for rule creation */
#define ecs_rule(world, ...)\
ecs_rule_init(world, &(ecs_filter_desc_t) __VA_ARGS__ )
/** Create a rule.
* A rule accepts the same descriptor as a filter, but has the additional
* ability to use query variables.
*
* Query variables can be used to constrain wildcards across multiple terms to
* the same entity. Regular ECS queries do this in a limited form, as querying
* for Position, Velocity only returns entities that have both components.
*
* Query variables expand this to constrain entities that are resolved while the
* query is being matched. Consider a query for all entities and the mission
* they are on:
* (Mission, *)
*
* If an entity is on multiple missions, the wildcard will match it multiple
* times. Now say we want to only list combat missions. Naively we could try:
* (Mission, *), CombatMission(*)
*
* But this doesn't work, as term 1 returns entities with missions, and term 2
* returns all combat missions for all entities. Query variables make it
* possible to apply CombatMission to the found mission:
* (Mission, $M), CombatMission($M)
*
* By using the same variable ('M') we ensure that CombatMission is applied to
* the mission found in the current result.
*
* Variables can be used in each part of the term (predicate, subject, object).
* This is a valid query:
* Likes($X, $Y), Likes($Y, $X)
*
* This is also a valid query:
* _Component, Serializable(_Component)
*
* In the query expression syntax, variables are prefixed with a $. When using
* the descriptor, specify the variable kind:
* desc.terms[0].second = { .name = "X", .var = EcsVarIsVariable }
*
* Different terms with the same variable name are automatically correlated by
* the query engine.
*
* A rule needs to be explicitly deleted with ecs_rule_fini().
*
* @param world The world.
* @param desc The descriptor (see ecs_filter_desc_t)
* @return The rule.
*/
FLECS_API
ecs_rule_t* ecs_rule_init(
ecs_world_t *world,
const ecs_filter_desc_t *desc);
/** Delete a rule.
*
* @param rule The rule.
*/
FLECS_API
void ecs_rule_fini(
ecs_rule_t *rule);
/** Obtain filter from rule.
* This operation returns the filter with which the rule was created.
*
* @param rule The rule.
* @return The filter.
*/
FLECS_API
const ecs_filter_t* ecs_rule_get_filter(
const ecs_rule_t *rule);
/** Return number of variables in rule.
*
* @param rule The rule.
* @return The number of variables/
*/
FLECS_API
int32_t ecs_rule_var_count(
const ecs_rule_t *rule);
/** Find variable index.
* This operation looks up the index of a variable in the rule. This index can
* be used in operations like ecs_iter_set_var() and ecs_iter_get_var().
*
* @param rule The rule.
* @param name The variable name.
* @return The variable index.
*/
FLECS_API
int32_t ecs_rule_find_var(
const ecs_rule_t *rule,
const char *name);
/** Get variable name.
* This operation returns the variable name for an index.
*
* @param rule The rule.
* @param var_id The variable index.
*/
FLECS_API
const char* ecs_rule_var_name(
const ecs_rule_t *rule,
int32_t var_id);
/** Test if variable is an entity.
* Internally the rule engine has entity variables and table variables. When
* iterating through rule variables (by using ecs_rule_variable_count()) only
* the values for entity variables are accessible. This operation enables an
* application to check if a variable is an entity variable.
*
* @param rule The rule.
* @param var_id The variable id.
*/
FLECS_API
bool ecs_rule_var_is_entity(
const ecs_rule_t *rule,
int32_t var_id);
/** Iterate a rule.
* Note that rule iterators may allocate memory, and that unless the iterator
* is iterated until completion, it may still hold resources. When stopping
* iteration before ecs_rule_next() has returned false, use ecs_iter_fini() to
* cleanup any remaining resources.
*
* @param world The world.
* @param rule The rule.
* @return An iterator.
*/
FLECS_API
ecs_iter_t ecs_rule_iter(
const ecs_world_t *world,
const ecs_rule_t *rule);
/** Progress rule iterator.
*
* @param it The iterator.
*/
FLECS_API
bool ecs_rule_next(
ecs_iter_t *it);
/** Progress instanced iterator.
* Should not be called unless you know what you're doing :-)
*
* @param it The iterator.
*/
FLECS_API
bool ecs_rule_next_instanced(
ecs_iter_t *it);
/** Convert rule to a string.
* This will convert the rule program to a string which can aid in debugging
* the behavior of a rule.
*
* The returned string must be freed with ecs_os_free().
*
* @param rule The rule.
* @return The string
*/
FLECS_API
char* ecs_rule_str(
const ecs_rule_t *rule);
/** Convert rule to string with profile.
* To use this you must set the EcsIterProfile flag on an iterator before
* starting iteration:
* it.flags |= EcsIterProfile
*
* @param rule The rule.
* @return The string
*/
FLECS_API
char* ecs_rule_str_w_profile(
const ecs_rule_t *rule,
const ecs_iter_t *it);
/** Populate variables from key-value string.
* Convenience function to set rule variables from a key-value string separated
* by comma's. The string must have the following format:
* var_a: value, var_b: value
*
* The key-value list may optionally be enclosed in parenthesis.
*
* @param rule The rule.
* @param it The iterator for which to set the variables.
* @param expr The key-value expression.
*/
FLECS_API
const char* ecs_rule_parse_vars(
ecs_rule_t *rule,
ecs_iter_t *it,
const char *expr);
#ifdef __cplusplus
}
#endif
#endif // FLECS_RULES_H
/** @} */
#endif // FLECS_RULES
#endif
#ifdef FLECS_SNAPSHOT
#ifdef FLECS_NO_SNAPSHOT
#error "FLECS_NO_SNAPSHOT failed: SNAPSHOT is required by other addons"
#endif
/**
* @file addons/snapshot.h
* @brief Snapshot addon.
*
* A snapshot records the state of a world in a way so that it can be restored
* later. Snapshots work with POD components and non-POD components, provided
* that the appropriate lifecycle actions are registered for non-POD components.
*
* A snapshot is tightly coupled to a world. It is not possible to restore a
* snapshot from world A into world B.
*/
#ifdef FLECS_SNAPSHOT
/**
* @defgroup c_addons_snapshot Snapshot
* @ingroup c_addons
* @brief Save & restore world.
*
* @{
*/
#ifndef FLECS_SNAPSHOT_H
#define FLECS_SNAPSHOT_H
#ifdef __cplusplus
extern "C" {
#endif
/** A snapshot stores the state of a world in a particular point in time. */
typedef struct ecs_snapshot_t ecs_snapshot_t;
/** Create a snapshot.
* This operation makes a copy of the current state of the world.
*
* @param world The world to snapshot.
* @return The snapshot.
*/
FLECS_API
ecs_snapshot_t* ecs_snapshot_take(
ecs_world_t *world);
/** Create a filtered snapshot.
* This operation is the same as ecs_snapshot_take(), but accepts an iterator so
* an application can control what is stored by the snapshot.
*
* @param iter An iterator to the data to be stored by the snapshot.
* @return The snapshot.
*/
FLECS_API
ecs_snapshot_t* ecs_snapshot_take_w_iter(
ecs_iter_t *iter);
/** Restore a snapshot.
* This operation restores the world to the state it was in when the specified
* snapshot was taken. A snapshot can only be used once for restoring, as its
* data replaces the data that is currently in the world.
* This operation also resets the last issued entity handle, so any calls to
* ecs_new() may return entity ids that have been issued before restoring the
* snapshot.
*
* The world in which the snapshot is restored must be the same as the world in
* which the snapshot is taken.
*
* @param world The world to restore the snapshot to.
* @param snapshot The snapshot to restore.
*/
FLECS_API
void ecs_snapshot_restore(
ecs_world_t *world,
ecs_snapshot_t *snapshot);
/** Obtain iterator to snapshot data.
*
* @param snapshot The snapshot to iterate over.
* @return Iterator to snapshot data. */
FLECS_API
ecs_iter_t ecs_snapshot_iter(
ecs_snapshot_t *snapshot);
/** Progress snapshot iterator.
*
* @param iter The snapshot iterator.
* @return True if more data is available, otherwise false.
*/
FLECS_API
bool ecs_snapshot_next(
ecs_iter_t *iter);
/** Free snapshot resources.
* This frees resources associated with a snapshot without restoring it.
*
* @param snapshot The snapshot to free.
*/
FLECS_API
void ecs_snapshot_free(
ecs_snapshot_t *snapshot);
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_PARSER
#ifdef FLECS_NO_PARSER
#error "FLECS_NO_PARSER failed: PARSER is required by other addons"
#endif
/**
* @file addons/parser.h
* @brief Parser addon.
*
* The parser addon parses string expressions into lists of terms, and can be
* used to construct filters, queries and types.
*/
#ifdef FLECS_PARSER
/**
* @defgroup c_addons_parser Parser
* @ingroup c_addons
* Query DSL parser and parsing utilities.
*
* @{
*/
#ifndef FLECS_PARSER_H
#define FLECS_PARSER_H
/** Maximum number of extra arguments in term expression */
#define ECS_PARSER_MAX_ARGS (16)
#ifdef __cplusplus
extern "C" {
#endif
/** Skip whitespace characters.
* This function skips whitespace characters. Does not skip newlines.
*
* @param ptr Pointer to (potential) whitespaces to skip.
* @return Pointer to the next non-whitespace character.
*/
FLECS_API
const char* ecs_parse_ws(
const char *ptr);
/** Skip whitespace and newline characters.
* This function skips whitespace characters.
*
* @param ptr Pointer to (potential) whitespaces to skip.
* @return Pointer to the next non-whitespace character.
*/
FLECS_API
const char* ecs_parse_ws_eol(
const char *ptr);
/** Utility function to parse an identifier */
const char* ecs_parse_identifier(
const char *name,
const char *expr,
const char *ptr,
char *token_out);
/** Parse digit.
* This function will parse until the first non-digit character is found. The
* provided expression must contain at least one digit character.
*
* @param ptr The expression to parse.
* @param token The output buffer.
* @return Pointer to the first non-digit character.
*/
FLECS_API
const char* ecs_parse_digit(
const char *ptr,
char *token);
/** Parse a single token.
* This function can be used as simple tokenizer by other parsers.
*
* @param name of program (used for logging).
* @param expr pointer to token to parse.
* @param ptr pointer to first character to parse.
* @param token_out Parsed token (buffer should be ECS_MAX_TOKEN_SIZE large)
* @return Pointer to the next token, or NULL if error occurred.
*/
FLECS_API
const char* ecs_parse_token(
const char *name,
const char *expr,
const char *ptr,
char *token_out,
char delim);
/** Parse term in expression.
* This operation parses a single term in an expression and returns a pointer
* to the next term expression.
*
* If the returned pointer points to the 0-terminator, the expression is fully
* parsed. The function would typically be called in a while loop:
*
* @code
* const char *ptr = expr;
* while (ptr[0] && (ptr = ecs_parse_term(world, name, expr, ptr, &term))) { }
* @endcode
*
* The operation does not attempt to find entity ids from the names in the
* expression. Use the ecs_term_resolve_ids() function to resolve the identifiers
* in the parsed term.
*
* The returned term will in most cases contain allocated resources, which
* should freed (or used) by the application. To free the resources for a term,
* use the ecs_term_free() function.
*
* The parser accepts expressions in the legacy string format.
*
* @param world The world.
* @param name The name of the expression (optional, improves error logs)
* @param expr The expression to parse (optional, improves error logs)
* @param ptr The pointer to the current term (must be in expr).
* @param term_out Out parameter for the term.
* @param extra_args Out array for extra args, must be of size ECS_PARSER_MAX_ARGS.
* @return pointer to next term if successful, NULL if failed.
*/
FLECS_API
char* ecs_parse_term(
const ecs_world_t *world,
const char *name,
const char *expr,
const char *ptr,
ecs_term_t *term_out,
ecs_oper_kind_t *extra_oper,
ecs_term_id_t *extra_args,
bool allow_newline);
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // FLECS_PARSER_H
/** @} */
#endif // FLECS_PARSER
#endif
#ifdef FLECS_OS_API_IMPL
#ifdef FLECS_NO_OS_API_IMPL
#error "FLECS_NO_OS_API_IMPL failed: OS_API_IMPL is required by other addons"
#endif
/**
* @file addons/os_api_impl.h
* @brief Default OS API implementation.
*/
#ifdef FLECS_OS_API_IMPL
/**
* @defgroup c_addons_os_api_impl OS API Implementation
* @ingroup c_addons
* Default implementation for OS API interface.
*
* @{
*/
#ifndef FLECS_OS_API_IMPL_H
#define FLECS_OS_API_IMPL_H
#ifdef __cplusplus
extern "C" {
#endif
FLECS_API
void ecs_set_os_api_impl(void);
#ifdef __cplusplus
}
#endif
#endif // FLECS_OS_API_IMPL_H
/** @} */
#endif // FLECS_OS_API_IMPL
#endif
#ifdef FLECS_MODULE
#ifdef FLECS_NO_MODULE
#error "FLECS_NO_MODULE failed: MODULE is required by other addons"
#endif
/**
* @file addons/module.h
* @brief Module addon.
*
* The module addon allows for creating and importing modules. Flecs modules
* enable applications to organize components and systems into reusable units of
* code that can easily be across projects.
*/
#ifdef FLECS_MODULE
/**
* @defgroup c_addons_module Module
* @ingroup c_addons
* Modules organize components, systems and more in reusable units of code.
*
* @{
*/
#ifndef FLECS_MODULE_H
#define FLECS_MODULE_H
#ifdef __cplusplus
extern "C" {
#endif
/** Import a module.
* This operation will load a modules and store the public module handles in the
* handles_out out parameter. The module name will be used to verify if the
* module was already loaded, in which case it won't be reimported. The name
* will be translated from PascalCase to an entity path (pascal.case) before the
* lookup occurs.
*
* Module contents will be stored as children of the module entity. This
* prevents modules from accidentally defining conflicting identifiers. This is
* enforced by setting the scope before and after loading the module to the
* module entity id.
*
* A more convenient way to import a module is by using the ECS_IMPORT macro.
*
* @param world The world.
* @param module The module import function.
* @param module_name The name of the module.
* @return The module entity.
*/
FLECS_API
ecs_entity_t ecs_import(
ecs_world_t *world,
ecs_module_action_t module,
const char *module_name);
/** Same as ecs_import(), but with name to scope conversion.
* PascalCase names are automatically converted to scoped names.
*
* @param world The world.
* @param module The module import function.
* @param module_name_c The name of the module.
* @return The module entity.
*/
FLECS_API
ecs_entity_t ecs_import_c(
ecs_world_t *world,
ecs_module_action_t module,
const char *module_name_c);
/** Import a module from a library.
* Similar to ecs_import(), except that this operation will attempt to load the
* module from a dynamic library.
*
* A library may contain multiple modules, which is why both a library name and
* a module name need to be provided. If only a library name is provided, the
* library name will be reused for the module name.
*
* The library will be looked up using a canonical name, which is in the same
* form as a module, like `flecs.components.transform`. To transform this
* identifier to a platform specific library name, the operation relies on the
* module_to_dl callback of the os_api which the application has to override if
* the default does not yield the correct library name.
*
* @param world The world.
* @param library_name The name of the library to load.
* @param module_name The name of the module to load.
*/
FLECS_API
ecs_entity_t ecs_import_from_library(
ecs_world_t *world,
const char *library_name,
const char *module_name);
/** Register a new module. */
FLECS_API
ecs_entity_t ecs_module_init(
ecs_world_t *world,
const char *c_name,
const ecs_component_desc_t *desc);
/** Define module. */
#define ECS_MODULE_DEFINE(world, id)\
{\
ecs_component_desc_t desc = {0};\
desc.entity = ecs_id(id);\
ecs_id(id) = ecs_module_init(world, #id, &desc);\
ecs_set_scope(world, ecs_id(id));\
}
#define ECS_MODULE(world, id)\
ecs_entity_t ecs_id(id) = 0; ECS_MODULE_DEFINE(world, id)\
(void)ecs_id(id)
/** Wrapper around ecs_import().
* This macro provides a convenient way to load a module with the world. It can
* be used like this:
*
* @code
* ECS_IMPORT(world, FlecsSystemsPhysics);
* @endcode
*/
#define ECS_IMPORT(world, id) ecs_import_c(world, id##Import, #id)
#ifdef __cplusplus
}
#endif
#endif
/** @} */
#endif
#endif
#ifdef FLECS_CPP
#ifdef FLECS_NO_CPP
#error "FLECS_NO_CPP failed: CPP is required by other addons"
#endif
/**
* @file addons/flecs_cpp.h
* @brief C++ utility functions
*
* This header contains utility functions that are accessible from both C and
* C++ code. These functions are not part of the public API and are not meant
* to be used directly by applications.
*/
#ifdef FLECS_CPP
#ifndef FLECS_CPP_H
#define FLECS_CPP_H
#ifdef __cplusplus
extern "C" {
#endif
// The functions in this file can be used from C or C++, but these macros are only relevant to C++.
#ifdef __cplusplus
#if defined(__clang__)
#define ECS_FUNC_NAME_FRONT(type, name) ((sizeof(#type) + sizeof(" flecs::_::() [T = ") + sizeof(#name)) - 3u)
#define ECS_FUNC_NAME_BACK (sizeof("]") - 1u)
#define ECS_FUNC_NAME __PRETTY_FUNCTION__
#elif defined(__GNUC__)
#define ECS_FUNC_NAME_FRONT(type, name) ((sizeof(#type) + sizeof(" flecs::_::() [with T = ") + sizeof(#name)) - 3u)
#define ECS_FUNC_NAME_BACK (sizeof("]") - 1u)
#define ECS_FUNC_NAME __PRETTY_FUNCTION__
#elif defined(_WIN32)
#define ECS_FUNC_NAME_FRONT(type, name) ((sizeof(#type) + sizeof(" __cdecl flecs::_::<") + sizeof(#name)) - 3u)
#define ECS_FUNC_NAME_BACK (sizeof(">(void)") - 1u)
#define ECS_FUNC_NAME __FUNCSIG__
#else
#error "implicit component registration not supported"
#endif
#define ECS_FUNC_TYPE_LEN(type, name, str)\
(flecs::string::length(str) - (ECS_FUNC_NAME_FRONT(type, name) + ECS_FUNC_NAME_BACK))
#endif
FLECS_API
char* ecs_cpp_get_type_name(
char *type_name,
const char *func_name,
size_t len,
size_t front_len);
FLECS_API
char* ecs_cpp_get_symbol_name(
char *symbol_name,
const char *type_name,
size_t len);
FLECS_API
char* ecs_cpp_get_constant_name(
char *constant_name,
const char *func_name,
size_t len,
size_t back_len);
FLECS_API
const char* ecs_cpp_trim_module(
ecs_world_t *world,
const char *type_name);
FLECS_API
void ecs_cpp_component_validate(
ecs_world_t *world,
ecs_entity_t id,
const char *name,
const char *symbol,
size_t size,
size_t alignment,
bool implicit_name);
FLECS_API
ecs_entity_t ecs_cpp_component_register(
ecs_world_t *world,
ecs_entity_t id,
const char *name,
const char *symbol,
ecs_size_t size,
ecs_size_t alignment,
bool implicit_name,
bool *existing_out);
FLECS_API
ecs_entity_t ecs_cpp_component_register_explicit(
ecs_world_t *world,
ecs_entity_t s_id,
ecs_entity_t id,
const char *name,
const char *type_name,
const char *symbol,
size_t size,
size_t alignment,
bool is_component,
bool *existing_out);
FLECS_API
void ecs_cpp_enum_init(
ecs_world_t *world,
ecs_entity_t id);
FLECS_API
ecs_entity_t ecs_cpp_enum_constant_register(
ecs_world_t *world,
ecs_entity_t parent,
ecs_entity_t id,
const char *name,
int value);
FLECS_API
int32_t ecs_cpp_reset_count_get(void);
FLECS_API
int32_t ecs_cpp_reset_count_inc(void);
#ifdef FLECS_META
FLECS_API
const ecs_member_t* ecs_cpp_last_member(
const ecs_world_t *world,
ecs_entity_t type);
#endif
#ifdef __cplusplus
}
#endif
#endif // FLECS_CPP_H
#endif // FLECS_CPP
#ifdef __cplusplus
/**
* @file addons/cpp/flecs.hpp
* @brief Flecs C++11 API.
*/
#pragma once
// STL includes
#include <type_traits>
/**
* @defgroup cpp C++ API
* @{
*/
namespace flecs
{
struct world;
struct world_async_stage;
struct iter;
struct entity_view;
struct entity;
struct type;
struct table;
struct table_range;
struct untyped_component;
template <typename T>
struct component;
namespace _
{
template <typename T, typename U = int>
struct cpp_type;
template <typename Func, typename ... Components>
struct each_delegate;
} // namespace _
} // namespace flecs
// Types imported from C API
/**
* @file addons/cpp/c_types.hpp
* @brief Aliases for types/constants from C API
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_globals API Types & Globals
* @ingroup cpp_core
* Types & constants bridged from C API.
*
* @{
*/
using world_t = ecs_world_t;
using world_info_t = ecs_world_info_t;
using query_group_info_t = ecs_query_group_info_t;
using id_t = ecs_id_t;
using entity_t = ecs_entity_t;
using type_t = ecs_type_t;
using table_t = ecs_table_t;
using filter_t = ecs_filter_t;
using observer_t = ecs_observer_t;
using query_t = ecs_query_t;
using rule_t = ecs_rule_t;
using ref_t = ecs_ref_t;
using iter_t = ecs_iter_t;
using type_info_t = ecs_type_info_t;
using type_hooks_t = ecs_type_hooks_t;
using flags32_t = ecs_flags32_t;
enum inout_kind_t {
InOutDefault = EcsInOutDefault,
InOutNone = EcsInOutNone,
InOut = EcsInOut,
In = EcsIn,
Out = EcsOut
};
enum oper_kind_t {
And = EcsAnd,
Or = EcsOr,
Not = EcsNot,
Optional = EcsOptional,
AndFrom = EcsAndFrom,
OrFrom = EcsOrFrom,
NotFrom = EcsNotFrom
};
/** Id flags */
static const flecs::entity_t Pair = ECS_PAIR;
static const flecs::entity_t Override = ECS_OVERRIDE;
static const flecs::entity_t Toggle = ECS_TOGGLE;
////////////////////////////////////////////////////////////////////////////////
//// Builtin components and tags
////////////////////////////////////////////////////////////////////////////////
/* Builtin components */
using Component = EcsComponent;
using Identifier = EcsIdentifier;
using Poly = EcsPoly;
using Target = EcsTarget;
/* Builtin tags */
static const flecs::entity_t Query = EcsQuery;
static const flecs::entity_t Observer = EcsObserver;
static const flecs::entity_t Private = EcsPrivate;
static const flecs::entity_t Module = EcsModule;
static const flecs::entity_t Prefab = EcsPrefab;
static const flecs::entity_t Disabled = EcsDisabled;
static const flecs::entity_t Empty = EcsEmpty;
static const flecs::entity_t Monitor = EcsMonitor;
static const flecs::entity_t System = EcsSystem;
static const flecs::entity_t Pipeline = ecs_id(EcsPipeline);
static const flecs::entity_t Phase = EcsPhase;
/* Builtin event tags */
static const flecs::entity_t OnAdd = EcsOnAdd;
static const flecs::entity_t OnRemove = EcsOnRemove;
static const flecs::entity_t OnSet = EcsOnSet;
static const flecs::entity_t UnSet = EcsUnSet;
static const flecs::entity_t OnTableCreate = EcsOnTableCreate;
static const flecs::entity_t OnTableDelete = EcsOnTableDelete;
/* Builtin term flags */
static const uint32_t Self = EcsSelf;
static const uint32_t Up = EcsUp;
static const uint32_t Down = EcsDown;
static const uint32_t Cascade = EcsCascade;
static const uint32_t Desc = EcsDesc;
static const uint32_t Parent = EcsParent;
static const uint32_t IsVariable = EcsIsVariable;
static const uint32_t IsEntity = EcsIsEntity;
static const uint32_t Filter = EcsFilter;
static const uint32_t TraverseFlags = EcsTraverseFlags;
/* Builtin entity ids */
static const flecs::entity_t Flecs = EcsFlecs;
static const flecs::entity_t FlecsCore = EcsFlecsCore;
static const flecs::entity_t World = EcsWorld;
/* Relationship properties */
static const flecs::entity_t Wildcard = EcsWildcard;
static const flecs::entity_t Any = EcsAny;
static const flecs::entity_t This = EcsThis;
static const flecs::entity_t Transitive = EcsTransitive;
static const flecs::entity_t Reflexive = EcsReflexive;
static const flecs::entity_t Final = EcsFinal;
static const flecs::entity_t DontInherit = EcsDontInherit;
static const flecs::entity_t AlwaysOverride = EcsAlwaysOverride;
static const flecs::entity_t Tag = EcsTag;
static const flecs::entity_t Union = EcsUnion;
static const flecs::entity_t Exclusive = EcsExclusive;
static const flecs::entity_t Acyclic = EcsAcyclic;
static const flecs::entity_t Traversable = EcsTraversable;
static const flecs::entity_t Symmetric = EcsSymmetric;
static const flecs::entity_t With = EcsWith;
static const flecs::entity_t OneOf = EcsOneOf;
/* Builtin relationships */
static const flecs::entity_t IsA = EcsIsA;
static const flecs::entity_t ChildOf = EcsChildOf;
static const flecs::entity_t DependsOn = EcsDependsOn;
static const flecs::entity_t SlotOf = EcsSlotOf;
/* Builtin identifiers */
static const flecs::entity_t Name = EcsName;
static const flecs::entity_t Symbol = EcsSymbol;
/* Cleanup policies */
static const flecs::entity_t OnDelete = EcsOnDelete;
static const flecs::entity_t OnDeleteTarget = EcsOnDeleteTarget;
static const flecs::entity_t Remove = EcsRemove;
static const flecs::entity_t Delete = EcsDelete;
static const flecs::entity_t Panic = EcsPanic;
/* Misc */
static const flecs::entity_t Flatten = EcsFlatten;
static const flecs::entity_t DefaultChildComponent = EcsDefaultChildComponent;
/* Builtin predicates for comparing entity ids in queries. Only supported by rules */
static const flecs::entity_t PredEq = EcsPredEq;
static const flecs::entity_t PredMatch = EcsPredMatch;
static const flecs::entity_t PredLookup = EcsPredLookup;
/* Builtin marker entities for query scopes */
static const flecs::entity_t ScopeOpen = EcsScopeOpen;
static const flecs::entity_t ScopeClose = EcsScopeClose;
/** @} */
}
// C++ utilities
/**
* @file addons/cpp/utils/utils.hpp
* @brief Flecs STL (FTL?)
*
* Flecs STL (FTL?)
* Minimalistic utilities that allow for STL like functionality without having
* to depend on the actual STL.
*/
// Macros so that C++ new calls can allocate using ecs_os_api memory allocation functions
// Rationale:
// - Using macros here instead of a templated function bc clients might override ecs_os_malloc
// to contain extra debug info like source tracking location. Using a template function
// in that scenario would collapse all source location into said function vs. the
// actual call site
// - FLECS_PLACEMENT_NEW(): exists to remove any naked new calls/make it easy to identify any regressions
// by grepping for new/delete
#define FLECS_PLACEMENT_NEW(_ptr, _type) ::new(flecs::_::placement_new_tag, _ptr) _type
#define FLECS_NEW(_type) FLECS_PLACEMENT_NEW(ecs_os_malloc(sizeof(_type)), _type)
#define FLECS_DELETE(_ptr) \
do { \
if (_ptr) { \
flecs::_::destruct_obj(_ptr); \
ecs_os_free(_ptr); \
} \
} while (false)
/* Faster (compile time) alternatives to std::move / std::forward. From:
* https://www.foonathan.net/2020/09/move-forward/
*/
#define FLECS_MOV(...) \
static_cast<flecs::remove_reference_t<decltype(__VA_ARGS__)>&&>(__VA_ARGS__)
#define FLECS_FWD(...) \
static_cast<decltype(__VA_ARGS__)&&>(__VA_ARGS__)
namespace flecs
{
namespace _
{
// Dummy Placement new tag to disambiguate from any other operator new overrides
struct placement_new_tag_t{};
constexpr placement_new_tag_t placement_new_tag{};
template<class Ty> inline void destruct_obj(Ty* _ptr) { _ptr->~Ty(); }
template<class Ty> inline void free_obj(Ty* _ptr) {
if (_ptr) {
destruct_obj(_ptr);
ecs_os_free(_ptr);
}
}
} // namespace _
} // namespace flecs
// Allows overriding flecs_static_assert, which is useful when testing
#ifndef flecs_static_assert
#define flecs_static_assert(cond, str) static_assert(cond, str)
#endif
inline void* operator new(size_t, flecs::_::placement_new_tag_t, void* _ptr) noexcept { return _ptr; }
inline void operator delete(void*, flecs::_::placement_new_tag_t, void*) noexcept { }
namespace flecs
{
// C++11/C++14 convenience template replacements
template <bool V, typename T, typename F>
using conditional_t = typename std::conditional<V, T, F>::type;
template <typename T>
using decay_t = typename std::decay<T>::type;
template <bool V, typename T = void>
using enable_if_t = typename std::enable_if<V, T>::type;
template <typename T>
using remove_pointer_t = typename std::remove_pointer<T>::type;
template <typename T>
using remove_reference_t = typename std::remove_reference<T>::type;
using std::is_base_of;
using std::is_empty;
using std::is_const;
using std::is_pointer;
using std::is_reference;
using std::is_volatile;
using std::is_same;
using std::is_enum;
// Determine constness even if T is a pointer type
template <typename T>
using is_const_p = is_const< remove_pointer_t<T> >;
// Apply cv modifiers from source type to destination type
// (from: https://stackoverflow.com/questions/52559336/add-const-to-type-if-template-arg-is-const)
template<class Src, class Dst>
using transcribe_const_t = conditional_t<is_const<Src>::value, Dst const, Dst>;
template<class Src, class Dst>
using transcribe_volatile_t = conditional_t<is_volatile<Src>::value, Dst volatile, Dst>;
template<class Src, class Dst>
using transcribe_cv_t = transcribe_const_t< Src, transcribe_volatile_t< Src, Dst> >;
template<class Src, class Dst>
using transcribe_pointer_t = conditional_t<is_pointer<Src>::value, Dst*, Dst>;
template<class Src, class Dst>
using transcribe_cvp_t = transcribe_cv_t< Src, transcribe_pointer_t< Src, Dst> >;
// More convenience templates. The if_*_t templates use int as default type
// instead of void. This enables writing code that's a bit less cluttered when
// the templates are used in a template declaration:
//
// enable_if_t<true>* = nullptr
// vs:
// if_t<true> = 0
template <bool V>
using if_t = enable_if_t<V, int>;
template <bool V>
using if_not_t = enable_if_t<false == V, int>;
namespace _
{
// Utility to prevent static assert from immediately triggering
template <class... T>
struct always_false {
static const bool value = false;
};
} // namespace _
} // namespace flecs
#include <stdlib.h>
/**
* @file addons/cpp/utils/array.hpp
* @brief Array class.
*
* Array class. Simple std::array like utility that is mostly there to aid
* template code where template expansion would lead to an array with size 0.
*/
namespace flecs {
template <typename T>
struct array_iterator
{
explicit array_iterator(T* value, int index) {
m_value = value;
m_index = index;
}
bool operator!=(array_iterator const& other) const
{
return m_index != other.m_index;
}
T & operator*() const
{
return m_value[m_index];
}
array_iterator& operator++()
{
++m_index;
return *this;
}
private:
T* m_value;
int m_index;
};
template <typename T, size_t Size, class Enable = void>
struct array final { };
template <typename T, size_t Size>
struct array<T, Size, enable_if_t<Size != 0> > final {
array() {};
array(const T (&elems)[Size]) {
int i = 0;
for (auto it = this->begin(); it != this->end(); ++ it) {
*it = elems[i ++];
}
}
T& operator[](int index) {
return m_array[index];
}
T& operator[](size_t index) {
return m_array[index];
}
array_iterator<T> begin() {
return array_iterator<T>(m_array, 0);
}
array_iterator<T> end() {
return array_iterator<T>(m_array, Size);
}
size_t size() {
return Size;
}
T* ptr() {
return m_array;
}
template <typename Func>
void each(const Func& func) {
for (auto& elem : *this) {
func(elem);
}
}
private:
T m_array[Size];
};
template<typename T, size_t Size>
array<T, Size> to_array(const T (&elems)[Size]) {
return array<T, Size>(elems);
}
// Specialized class for zero-sized array
template <typename T, size_t Size>
struct array<T, Size, enable_if_t<Size == 0>> final {
array() {};
array(const T* (&elems)) { (void)elems; }
T operator[](size_t index) { ecs_os_abort(); (void)index; return T(); }
array_iterator<T> begin() { return array_iterator<T>(nullptr, 0); }
array_iterator<T> end() { return array_iterator<T>(nullptr, 0); }
size_t size() {
return 0;
}
T* ptr() {
return NULL;
}
};
}
/**
* @file addons/cpp/utils/string.hpp
* @brief String utility that doesn't implicitly allocate memory.
*/
namespace flecs {
struct string_view;
// This removes dependencies on std::string (and therefore STL) and allows the
// API to return allocated strings without incurring additional allocations when
// wrapping in an std::string.
struct string {
explicit string()
: m_str(nullptr)
, m_const_str("")
, m_length(0) { }
explicit string(char *str)
: m_str(str)
, m_const_str(str ? str : "")
, m_length(str ? ecs_os_strlen(str) : 0) { }
~string() {
// If flecs is included in a binary but is not used, it is possible that
// the OS API is not initialized. Calling ecs_os_free in that case could
// crash the application during exit. However, if a string has been set
// flecs has been used, and OS API should have been initialized.
if (m_str) {
ecs_os_free(m_str);
}
}
string(string&& str) noexcept {
ecs_os_free(m_str);
m_str = str.m_str;
m_const_str = str.m_const_str;
m_length = str.m_length;
str.m_str = nullptr;
}
operator const char*() const {
return m_const_str;
}
string& operator=(string&& str) noexcept {
ecs_os_free(m_str);
m_str = str.m_str;
m_const_str = str.m_const_str;
m_length = str.m_length;
str.m_str = nullptr;
return *this;
}
// Ban implicit copies/allocations
string& operator=(const string& str) = delete;
string(const string& str) = delete;
bool operator==(const flecs::string& str) const {
if (str.m_const_str == m_const_str) {
return true;
}
if (!m_const_str || !str.m_const_str) {
return false;
}
if (str.m_length != m_length) {
return false;
}
return ecs_os_strcmp(str, m_const_str) == 0;
}
bool operator!=(const flecs::string& str) const {
return !(*this == str);
}
bool operator==(const char *str) const {
if (m_const_str == str) {
return true;
}
if (!m_const_str || !str) {
return false;
}
return ecs_os_strcmp(str, m_const_str) == 0;
}
bool operator!=(const char *str) const {
return !(*this == str);
}
const char* c_str() const {
return m_const_str;
}
std::size_t length() const {
return static_cast<std::size_t>(m_length);
}
template <size_t N>
static constexpr size_t length( char const (&)[N] ) {
return N - 1;
}
std::size_t size() const {
return length();
}
void clear() {
ecs_os_free(m_str);
m_str = nullptr;
m_const_str = nullptr;
}
bool contains(const char *substr) {
if (m_const_str) {
return strstr(m_const_str, substr) != nullptr;
} else {
return false;
}
}
protected:
// Must be constructed through string_view. This allows for using the string
// class for both owned and non-owned strings, which can reduce allocations
// when code conditionally should store a literal or an owned string.
// Making this constructor private forces the code to explicitly create a
// string_view which emphasizes that the string won't be freed by the class.
string(const char *str)
: m_str(nullptr)
, m_const_str(str ? str : "")
, m_length(str ? ecs_os_strlen(str) : 0) { }
char *m_str = nullptr;
const char *m_const_str;
ecs_size_t m_length;
};
// For consistency, the API returns a string_view where it could have returned
// a const char*, so an application won't have to think about whether to call
// c_str() or not. The string_view is a thin wrapper around a string that forces
// the API to indicate explicitly when a string is owned or not.
struct string_view : string {
explicit string_view(const char *str)
: string(str) { }
};
}
/**
* @file addons/cpp/utils/enum.hpp
* @brief Compile time enum reflection utilities.
*
* Discover at compile time valid enumeration constants for an enumeration type
* and their names. This is used to automatically register enum constants.
*/
#include <string.h>
#define FLECS_ENUM_MAX(T) _::to_constant<T, 128>::value
#define FLECS_ENUM_MAX_COUNT (FLECS_ENUM_MAX(int) + 1)
#ifndef FLECS_CPP_ENUM_REFLECTION_SUPPORT
#if !defined(__clang__) && defined(__GNUC__)
#if __GNUC__ > 7 || (__GNUC__ == 7 && __GNUC_MINOR__ >= 5)
#define FLECS_CPP_ENUM_REFLECTION_SUPPORT 1
#else
#define FLECS_CPP_ENUM_REFLECTION_SUPPORT 0
#endif
#else
#define FLECS_CPP_ENUM_REFLECTION_SUPPORT 1
#endif
#endif
namespace flecs {
/** Int to enum */
namespace _ {
template <typename E, int Value>
struct to_constant {
#if defined(__clang__) && __clang_major__ >= 16
// https://reviews.llvm.org/D130058, https://reviews.llvm.org/D131307
static constexpr E value = __builtin_bit_cast(E, Value);
#else
static constexpr E value = static_cast<E>(Value);
#endif
};
template <typename E, int Value>
constexpr E to_constant<E, Value>::value;
}
/** Convenience type with enum reflection data */
template <typename E>
struct enum_data;
template <typename E>
static enum_data<E> enum_type(flecs::world_t *world);
template <typename E>
struct enum_last {
static constexpr E value = FLECS_ENUM_MAX(E);
};
/* Utility macro to override enum_last trait */
#define FLECS_ENUM_LAST(T, Last)\
namespace flecs {\
template<>\
struct enum_last<T> {\
static constexpr T value = Last;\
};\
}
namespace _ {
#if INTPTR_MAX == INT64_MAX
#ifdef ECS_TARGET_MSVC
#if _MSC_VER >= 1930
#define ECS_SIZE_T_STR "unsigned __int64"
#else
#define ECS_SIZE_T_STR "unsigned int"
#endif
#elif defined(__clang__)
#define ECS_SIZE_T_STR "size_t"
#else
#ifdef ECS_TARGET_WINDOWS
#define ECS_SIZE_T_STR "constexpr size_t; size_t = long long unsigned int"
#else
#define ECS_SIZE_T_STR "constexpr size_t; size_t = long unsigned int"
#endif
#endif
#else
#ifdef ECS_TARGET_MSVC
#if _MSC_VER >= 1930
#define ECS_SIZE_T_STR "unsigned __int32"
#else
#define ECS_SIZE_T_STR "unsigned int"
#endif
#elif defined(__clang__)
#define ECS_SIZE_T_STR "size_t"
#else
#ifdef ECS_TARGET_WINDOWS
#define ECS_SIZE_T_STR "constexpr size_t; size_t = unsigned int"
#else
#define ECS_SIZE_T_STR "constexpr size_t; size_t = unsigned int"
#endif
#endif
#endif
template <typename E>
constexpr size_t enum_type_len() {
return ECS_FUNC_TYPE_LEN(, enum_type_len, ECS_FUNC_NAME)
- (sizeof(ECS_SIZE_T_STR) - 1u);
}
/** Test if value is valid for enumeration.
* This function leverages that when a valid value is provided,
* __PRETTY_FUNCTION__ contains the enumeration name, whereas if a value is
* invalid, the string contains a number. */
#if defined(ECS_TARGET_CLANG)
#if ECS_CLANG_VERSION < 13
template <typename E, E C>
constexpr bool enum_constant_is_valid() {
return !(
(ECS_FUNC_NAME[ECS_FUNC_NAME_FRONT(bool, enum_constant_is_valid) +
enum_type_len<E>() + 6 /* ', C = ' */] >= '0') &&
(ECS_FUNC_NAME[ECS_FUNC_NAME_FRONT(bool, enum_constant_is_valid) +
enum_type_len<E>() + 6 /* ', C = ' */] <= '9'));
}
#else
template <typename E, E C>
constexpr bool enum_constant_is_valid() {
return (ECS_FUNC_NAME[ECS_FUNC_NAME_FRONT(bool, enum_constant_is_valid) +
enum_type_len<E>() + 6 /* ', E C = ' */] != '(');
}
#endif
#elif defined(ECS_TARGET_GNU)
template <typename E, E C>
constexpr bool enum_constant_is_valid() {
return (ECS_FUNC_NAME[ECS_FUNC_NAME_FRONT(constexpr bool, enum_constant_is_valid) +
enum_type_len<E>() + 8 /* ', E C = ' */] != '(');
}
#else
/* Use different trick on MSVC, since it uses hexadecimal representation for
* invalid enum constants. We can leverage that msvc inserts a C-style cast
* into the name, and the location of its first character ('(') is known. */
template <typename E, E C>
constexpr bool enum_constant_is_valid() {
return ECS_FUNC_NAME[ECS_FUNC_NAME_FRONT(bool, enum_constant_is_valid) +
enum_type_len<E>() + 1] != '(';
}
#endif
template <typename E, E C>
struct enum_is_valid {
static constexpr bool value = enum_constant_is_valid<E, C>();
};
/** Extract name of constant from string */
template <typename E, E C>
static const char* enum_constant_to_name() {
static const size_t len = ECS_FUNC_TYPE_LEN(const char*, enum_constant_to_name, ECS_FUNC_NAME);
static char result[len + 1] = {};
return ecs_cpp_get_constant_name(
result, ECS_FUNC_NAME, string::length(ECS_FUNC_NAME),
ECS_FUNC_NAME_BACK);
}
/** Enumeration constant data */
struct enum_constant_data {
flecs::entity_t id;
int next;
};
/** Enumeration type data */
struct enum_data_impl {
flecs::entity_t id;
int min;
int max;
enum_constant_data constants[FLECS_ENUM_MAX_COUNT];
};
/** Class that scans an enum for constants, extracts names & creates entities */
template <typename E>
struct enum_type {
static enum_data_impl data;
static enum_type<E>& get() {
static _::enum_type<E> instance;
return instance;
}
flecs::entity_t entity(E value) const {
return data.constants[static_cast<int>(value)].id;
}
void init(flecs::world_t *world, flecs::entity_t id) {
#if !FLECS_CPP_ENUM_REFLECTION_SUPPORT
ecs_abort(ECS_UNSUPPORTED, "enum reflection requires gcc 7.5 or higher")
#endif
ecs_log_push();
ecs_cpp_enum_init(world, id);
data.id = id;
data.min = FLECS_ENUM_MAX(int);
init< enum_last<E>::value >(world);
ecs_log_pop();
}
private:
template <E Value>
static constexpr int to_int() {
return static_cast<int>(Value);
}
template <int Value>
static constexpr E from_int() {
return to_constant<E, Value>::value;
}
template <E Value>
static constexpr int is_not_0() {
return static_cast<int>(Value != from_int<0>());
}
template <E Value, flecs::if_not_t< enum_constant_is_valid<E, Value>() > = 0>
static void init_constant(flecs::world_t*) { }
template <E Value, flecs::if_t< enum_constant_is_valid<E, Value>() > = 0>
static void init_constant(flecs::world_t *world) {
int v = to_int<Value>();
const char *name = enum_constant_to_name<E, Value>();
data.constants[v].next = data.min;
data.min = v;
if (!data.max) {
data.max = v;
}
data.constants[v].id = ecs_cpp_enum_constant_register(
world, data.id, data.constants[v].id, name, v);
}
template <E Value = FLECS_ENUM_MAX(E) >
static void init(flecs::world_t *world) {
init_constant<Value>(world);
if (is_not_0<Value>()) {
init<from_int<to_int<Value>() - is_not_0<Value>()>()>(world);
}
}
};
template <typename E>
enum_data_impl enum_type<E>::data;
template <typename E, if_t< is_enum<E>::value > = 0>
inline static void init_enum(flecs::world_t *world, flecs::entity_t id) {
_::enum_type<E>::get().init(world, id);
}
template <typename E, if_not_t< is_enum<E>::value > = 0>
inline static void init_enum(flecs::world_t*, flecs::entity_t) { }
} // namespace _
/** Enumeration type data wrapper with world pointer */
template <typename E>
struct enum_data {
enum_data(flecs::world_t *world, _::enum_data_impl& impl)
: world_(world)
, impl_(impl) { }
bool is_valid(int value) {
return impl_.constants[value].id != 0;
}
int first() const {
return impl_.min;
}
int last() const {
return impl_.max;
}
int next(int cur) const {
return impl_.constants[cur].next;
}
flecs::entity entity() const;
flecs::entity entity(int value) const;
flecs::entity entity(E value) const;
flecs::world_t *world_;
_::enum_data_impl& impl_;
};
/** Convenience function for getting enum reflection data */
template <typename E>
enum_data<E> enum_type(flecs::world_t *world) {
_::cpp_type<E>::id(world); // Ensure enum is registered
auto& ref = _::enum_type<E>::get();
return enum_data<E>(world, ref.data);
}
} // namespace flecs
/**
* @file addons/cpp/utils/stringstream.hpp
* @brief Wrapper around ecs_strbuf_t that provides a simple stringstream like API.
*/
namespace flecs {
struct stringstream {
explicit stringstream()
: m_buf({}) { }
~stringstream() {
ecs_strbuf_reset(&m_buf);
}
stringstream(stringstream&& str) noexcept {
ecs_strbuf_reset(&m_buf);
m_buf = str.m_buf;
str.m_buf = {};
}
stringstream& operator=(stringstream&& str) noexcept {
ecs_strbuf_reset(&m_buf);
m_buf = str.m_buf;
str.m_buf = {};
return *this;
}
// Ban implicit copies/allocations
stringstream& operator=(const stringstream& str) = delete;
stringstream(const stringstream& str) = delete;
stringstream& operator<<(const char* str) {
ecs_strbuf_appendstr(&m_buf, str);
return *this;
}
flecs::string str() {
return flecs::string(ecs_strbuf_get(&m_buf));
}
private:
ecs_strbuf_t m_buf;
};
}
/**
* @file addons/cpp/utils/function_traits.hpp
* @brief Compile time utilities to inspect properties of functions.
*
* Code from: https://stackoverflow.com/questions/27024238/c-template-mechanism-to-get-the-number-of-function-arguments-which-would-work
*/
namespace flecs {
namespace _ {
template <typename ... Args>
struct arg_list { };
// Base type that contains the traits
template <typename ReturnType, typename... Args>
struct function_traits_defs
{
static constexpr bool is_callable = true;
static constexpr size_t arity = sizeof...(Args);
using return_type = ReturnType;
using args = arg_list<Args ...>;
};
// Primary template for function_traits_impl
template <typename T>
struct function_traits_impl {
static constexpr bool is_callable = false;
};
// Template specializations for the different kinds of function types (whew)
template <typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(Args...)>
: function_traits_defs<ReturnType, Args...> {};
template <typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(*)(Args...)>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...)>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) const>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) const&>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) const&&>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) volatile>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) volatile&>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) volatile&&>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) const volatile>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) const volatile&>
: function_traits_defs<ReturnType, Args...> {};
template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits_impl<ReturnType(ClassType::*)(Args...) const volatile&&>
: function_traits_defs<ReturnType, Args...> {};
// Primary template for function_traits_no_cv. If T is not a function, the
// compiler will attempt to instantiate this template and fail, because its base
// is undefined.
template <typename T, typename V = void>
struct function_traits_no_cv
: function_traits_impl<T> {};
// Specialized template for function types
template <typename T>
struct function_traits_no_cv<T, decltype((void)&T::operator())>
: function_traits_impl<decltype(&T::operator())> {};
// Front facing template that decays T before ripping it apart.
template <typename T>
struct function_traits
: function_traits_no_cv< decay_t<T> > {};
} // _
template <typename T>
struct is_callable {
static constexpr bool value = _::function_traits<T>::is_callable;
};
template <typename T>
struct arity {
static constexpr int value = _::function_traits<T>::arity;
};
template <typename T>
using return_type_t = typename _::function_traits<T>::return_type;
template <typename T>
using arg_list_t = typename _::function_traits<T>::args;
// First arg
template<typename Func, typename ... Args>
struct first_arg_impl;
template<typename Func, typename T, typename ... Args>
struct first_arg_impl<Func, _::arg_list<T, Args ...> > {
using type = T;
};
template<typename Func>
struct first_arg {
using type = typename first_arg_impl<Func, arg_list_t<Func>>::type;
};
template <typename Func>
using first_arg_t = typename first_arg<Func>::type;
// Last arg
template<typename Func, typename ... Args>
struct second_arg_impl;
template<typename Func, typename First, typename T, typename ... Args>
struct second_arg_impl<Func, _::arg_list<First, T, Args ...> > {
using type = T;
};
template<typename Func>
struct second_arg {
using type = typename second_arg_impl<Func, arg_list_t<Func>>::type;
};
template <typename Func>
using second_arg_t = typename second_arg<Func>::type;
} // flecs
// Mixin forward declarations
/**
* @file addons/cpp/mixins/id/decl.hpp
* @brief Id class.
*/
#pragma once
namespace flecs {
struct id;
struct entity;
/**
* @defgroup cpp_ids Ids
* @ingroup cpp_core
* Class for working with entity, component, tag and pair ids.
*
* @{
*/
/** Class that wraps around a flecs::id_t.
* A flecs id is an identifier that can be added to entities. Ids can be:
* - entities (including components, tags)
* - pair ids
* - entities with id flags set (like flecs::Override, flecs::Toggle)
*/
struct id {
id()
: m_world(nullptr)
, m_id(0) { }
explicit id(flecs::id_t value)
: m_world(nullptr)
, m_id(value) { }
explicit id(flecs::world_t *world, flecs::id_t value = 0)
: m_world(world)
, m_id(value) { }
explicit id(flecs::world_t *world, flecs::id_t first, flecs::id_t second)
: m_world(world)
, m_id(ecs_pair(first, second)) { }
explicit id(flecs::id_t first, flecs::id_t second)
: m_world(nullptr)
, m_id(ecs_pair(first, second)) { }
explicit id(const flecs::id& first, const flecs::id& second)
: m_world(first.m_world)
, m_id(ecs_pair(first.m_id, second.m_id)) { }
/** Test if id is pair (has first, second) */
bool is_pair() const {
return (m_id & ECS_ID_FLAGS_MASK) == flecs::Pair;
}
/** Test if id is a wildcard */
bool is_wildcard() const {
return ecs_id_is_wildcard(m_id);
}
/** Test if id is entity */
bool is_entity() const {
return !(m_id & ECS_ID_FLAGS_MASK);
}
/** Return id as entity (only allowed when id is valid entity) */
flecs::entity entity() const;
/** Return id with role added */
flecs::entity add_flags(flecs::id_t flags) const;
/** Return id with role removed */
flecs::entity remove_flags(flecs::id_t flags) const;
/** Return id without role */
flecs::entity remove_flags() const;
/** Return id without role */
flecs::entity remove_generation() const;
/** Return component type of id */
flecs::entity type_id() const;
/** Test if id has specified role */
bool has_flags(flecs::id_t flags) const {
return ((m_id & flags) == flags);
}
/** Test if id has any role */
bool has_flags() const {
return (m_id & ECS_ID_FLAGS_MASK) != 0;
}
/** Return id flags set on id */
flecs::entity flags() const;
/** Test if id has specified first */
bool has_relation(flecs::id_t first) const {
if (!is_pair()) {
return false;
}
return ECS_PAIR_FIRST(m_id) == first;
}
/** Get first element from a pair.
* If the id is not a pair, this operation will fail. When the id has a
* world, the operation will ensure that the returned id has the correct
* generation count. */
flecs::entity first() const;
/** Get second element from a pair.
* If the id is not a pair, this operation will fail. When the id has a
* world, the operation will ensure that the returned id has the correct
* generation count. */
flecs::entity second() const;
/* Convert id to string */
flecs::string str() const {
return flecs::string(ecs_id_str(m_world, m_id));
}
/** Convert role of id to string. */
flecs::string flags_str() const {
return flecs::string_view( ecs_id_flag_str(m_id & ECS_ID_FLAGS_MASK));
}
/** Return flecs::id_t value */
flecs::id_t raw_id() const {
return m_id;
}
operator flecs::id_t() const {
return m_id;
}
flecs::world world() const;
protected:
/* World is optional, but guarantees that entity identifiers extracted from
* the id are valid */
flecs::world_t *m_world;
flecs::id_t m_id;
};
/** @} */
}
/**
* @file addons/cpp/mixins/term/decl.hpp
* @brief Term declarations.
*/
#pragma once
namespace flecs {
/**
* @ingroup cpp_core_filters
*
* @{
*/
struct term;
struct term_builder;
/** @} */
}
/**
* @file addons/cpp/mixins/filter/decl.hpp
* @brief Filter declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_core_filters Filters
* @ingroup cpp_core
* Filters are cheaper to create, but slower to iterate than flecs::query.
*
* @{
*/
struct filter_base;
template<typename ... Components>
struct filter;
template<typename ... Components>
struct filter_builder;
/** @} */
}
/**
* @file addons/cpp/mixins/event/decl.hpp
* @brief Event declarations.
*/
#pragma once
/**
* @file addons/cpp/mixins/event/builder.hpp
* @brief Event builder.
*/
#pragma once
#define ECS_EVENT_DESC_ID_COUNT_MAX (8)
namespace flecs {
/**
* @ingroup cpp_addons_event
* @{
*/
/** Event builder interface */
template <typename Base, typename E>
struct event_builder_base {
event_builder_base(flecs::world_t *world, flecs::entity_t event)
: m_world(world)
, m_desc{}
, m_ids{}
, m_ids_array{}
{
m_desc.event = event;
}
/** Add component to emit for */
template <typename T>
Base& id() {
m_ids.array = m_ids_array;
m_ids.array[m_ids.count] = _::cpp_type<T>().id(m_world);
m_ids.count ++;
return *this;
}
/**
* Add pair to emit for
* @tparam First The first element of the pair.
* @tparam Second the second element of a pair.
*/
template <typename First, typename Second>
Base& id() {
return id(
ecs_pair(_::cpp_type<First>::id(this->m_world),
_::cpp_type<Second>::id(this->m_world)));
}
/**
* Add pair to emit for
* @tparam First The first element of the pair.
* @param second The second element of the pair id.
*/
template <typename First>
Base& id(entity_t second) {
return id(ecs_pair(_::cpp_type<First>::id(this->m_world), second));
}
/**
* Add pair to emit for
* @param first The first element of the pair type.
* @param second The second element of the pair id.
*/
Base& id(entity_t first, entity_t second) {
return id(ecs_pair(first, second));
}
/** Add (component) id to emit for */
Base& id(flecs::id_t id) {
m_ids.array = m_ids_array;
m_ids.array[m_ids.count] = id;
m_ids.count ++;
return *this;
}
/** Set entity for which to emit event */
Base& entity(flecs::entity_t e) {
m_desc.entity = e;
return *this;
}
/* Set table for which to emit event */
Base& table(flecs::table_t *t, int32_t offset = 0, int32_t count = 0) {
m_desc.table = t;
m_desc.offset = offset;
m_desc.count = count;
return *this;
}
/* Set event data */
Base& ctx(const E* ptr) {
m_desc.const_param = ptr;
return *this;
}
/* Set event data */
Base& ctx(E* ptr) {
m_desc.param = ptr;
return *this;
}
void emit() {
m_ids.array = m_ids_array;
m_desc.ids = &m_ids;
m_desc.observable = const_cast<flecs::world_t*>(ecs_get_world(m_world));
ecs_emit(m_world, &m_desc);
}
void enqueue() {
m_ids.array = m_ids_array;
m_desc.ids = &m_ids;
m_desc.observable = const_cast<flecs::world_t*>(ecs_get_world(m_world));
ecs_enqueue(m_world, &m_desc);
}
protected:
flecs::world_t *m_world;
ecs_event_desc_t m_desc;
flecs::type_t m_ids;
flecs::id_t m_ids_array[ECS_EVENT_DESC_ID_COUNT_MAX];
private:
operator Base&() {
return *static_cast<Base*>(this);
}
};
struct event_builder : event_builder_base<event_builder, void> {
using event_builder_base::event_builder_base;
};
template <typename E>
struct event_builder_typed : event_builder_base<event_builder_typed<E>, E> {
private:
using Class = event_builder_typed<E>;
public:
using event_builder_base<Class, E>::event_builder_base;
/* Set event data */
Class& ctx(const E& ptr) {
this->m_desc.const_param = &ptr;
return *this;
}
/* Set event data */
Class& ctx(E&& ptr) {
this->m_desc.param = &ptr;
return *this;
}
};
/** @} */
}
namespace flecs {
namespace _ {
// Utility to derive event type from function
template <typename Func, typename U = int>
struct event_from_func;
// Specialization for observer callbacks with a single argument
template <typename Func>
struct event_from_func<Func, if_t< arity<Func>::value == 1>> {
using type = decay_t<first_arg_t<Func>>;
};
// Specialization for observer callbacks with an initial entity src argument
template <typename Func>
struct event_from_func<Func, if_t< arity<Func>::value == 2>> {
using type = decay_t<second_arg_t<Func>>;
};
template <typename Func>
using event_from_func_t = typename event_from_func<Func>::type;
}
}
/**
* @file addons/cpp/mixins/query/decl.hpp
* @brief Query declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_core_queries Queries
* @ingroup cpp_core
* Cached query implementation. Fast to iterate, but slower to create than flecs::filter.
*
* @{
*/
struct query_base;
template<typename ... Components>
struct query;
template<typename ... Components>
struct query_builder;
/** @} */
}
/**
* @file addons/cpp/mixins/observer/decl.hpp
* @brief Observer declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_observers Observers
* @ingroup cpp_core
* Observers let applications register callbacks for ECS events.
*
* @{
*/
struct observer;
template<typename ... Components>
struct observer_builder;
/** @} */
}
#ifdef FLECS_SYSTEM
/**
* @file addons/cpp/mixins/system/decl.hpp
* @brief System module declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_systems Systems
* @ingroup cpp_addons
* Systems are a query + function that can be ran manually or by a pipeline.
*
* @{
*/
using TickSource = EcsTickSource;
struct system;
template<typename ... Components>
struct system_builder;
namespace _ {
void system_init(flecs::world& world);
/** @} */
} // namespace _
} // namespace flecs
#endif
#ifdef FLECS_PIPELINE
/**
* @file addons/cpp/mixins/pipeline/decl.hpp
* @brief Pipeline module declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_pipelines Pipelines
* @ingroup cpp_addons
* Pipelines order and schedule systems for execution.
*
* @{
*/
template <typename ... Components>
struct pipeline;
template <typename ... Components>
struct pipeline_builder;
/* Builtin pipeline tags */
static const flecs::entity_t OnStart = EcsOnStart;
static const flecs::entity_t PreFrame = EcsPreFrame;
static const flecs::entity_t OnLoad = EcsOnLoad;
static const flecs::entity_t PostLoad = EcsPostLoad;
static const flecs::entity_t PreUpdate = EcsPreUpdate;
static const flecs::entity_t OnUpdate = EcsOnUpdate;
static const flecs::entity_t OnValidate = EcsOnValidate;
static const flecs::entity_t PostUpdate = EcsPostUpdate;
static const flecs::entity_t PreStore = EcsPreStore;
static const flecs::entity_t OnStore = EcsOnStore;
static const flecs::entity_t PostFrame = EcsPostFrame;
/** @} */
}
#endif
#ifdef FLECS_TIMER
/**
* @file addons/cpp/mixins/timer/decl.hpp
* @brief Timer module declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_timer Timer
* @ingroup cpp_addons
* Run systems at a time interval.
*
* @{
*/
using Timer = EcsTimer;
using RateFilter = EcsRateFilter;
struct timer;
/** @} */
namespace _ {
void timer_init(flecs::world& world);
} // namespace _
} // namespace flecs
#endif
#ifdef FLECS_SNAPSHOT
/**
* @file addons/cpp/mixins/snapshot/decl.hpp
* @brief Snapshot module declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_snapshots Snapshots
* @ingroup cpp_addons
* Save & restore world.
*
* @{
*/
using snapshot_t = ecs_snapshot_t;
struct snapshot;
/** @} */
}
#endif
#ifdef FLECS_DOC
/**
* @file addons/cpp/mixins/doc/decl.hpp
* @brief Doc mixin declarations.
*/
#pragma once
namespace flecs {
namespace doc {
/**
* @defgroup cpp_addons_doc Doc
* @ingroup cpp_addons
* Utilities for documenting entities, components and systems.
*
* @{
*/
/** flecs.doc.Description component */
using Description = EcsDocDescription;
/** flecs.doc.Brief component */
static const flecs::entity_t Brief = EcsDocBrief;
/** flecs.doc.Detail component */
static const flecs::entity_t Detail = EcsDocDetail;
/** flecs.doc.Link component */
static const flecs::entity_t Link = EcsDocLink;
/** flecs.doc.Color component */
static const flecs::entity_t Color = EcsDocColor;
/** @private */
namespace _ {
/** @private */
void init(flecs::world& world);
}
/** @} */
}
}
#endif
#ifdef FLECS_REST
/**
* @file addons/cpp/mixins/rest/decl.hpp
* @brief Rest module declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_rest Rest
* @ingroup cpp_addons
* REST API for querying and mutating entities.
*
* @{
*/
using Rest = EcsRest;
namespace rest {
namespace _ {
void init(flecs::world& world);
}
}
/** @} */
}
#endif
#ifdef FLECS_RULES
/**
* @file addons/cpp/mixins/rule/decl.hpp
* @brief Rule declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_rules Rules
* @ingroup cpp_addons
* Rules are an advanced query engine for matching against entity graphs.
*
* @{
*/
struct rule_base;
template<typename ... Components>
struct rule;
template<typename ... Components>
struct rule_builder;
/** @} */
}
#endif
#ifdef FLECS_META
/**
* @file addons/cpp/mixins/meta/decl.hpp
* @brief Meta declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_meta Meta
* @ingroup cpp_addons
* Flecs reflection framework.
*
* @{
*/
/* Primitive type aliases */
using bool_t = ecs_bool_t;
using char_t = ecs_char_t;
using u8_t = ecs_u8_t;
using u16_t = ecs_u16_t;
using u32_t = ecs_u32_t;
using u64_t = ecs_u64_t;
using uptr_t = ecs_uptr_t;
using i8_t = ecs_i8_t;
using i16_t = ecs_i16_t;
using i32_t = ecs_i32_t;
using i64_t = ecs_i64_t;
using iptr_t = ecs_iptr_t;
using f32_t = ecs_f32_t;
using f64_t = ecs_f64_t;
/* Embedded type aliases */
using member_t = ecs_member_t;
using enum_constant_t = ecs_enum_constant_t;
using bitmask_constant_t = ecs_bitmask_constant_t;
/* Components */
using MetaType = EcsMetaType;
using MetaTypeSerialized = EcsMetaTypeSerialized;
using Primitive = EcsPrimitive;
using Enum = EcsEnum;
using Bitmask = EcsBitmask;
using Member = EcsMember;
using MemberRanges = EcsMemberRanges;
using Struct = EcsStruct;
using Array = EcsArray;
using Vector = EcsVector;
using Unit = EcsUnit;
/** Base type for bitmasks */
struct bitmask {
uint32_t value;
};
/* Handles to builtin reflection types */
static const flecs::entity_t Bool = ecs_id(ecs_bool_t);
static const flecs::entity_t Char = ecs_id(ecs_char_t);
static const flecs::entity_t Byte = ecs_id(ecs_byte_t);
static const flecs::entity_t U8 = ecs_id(ecs_u8_t);
static const flecs::entity_t U16 = ecs_id(ecs_u16_t);
static const flecs::entity_t U32 = ecs_id(ecs_u32_t);
static const flecs::entity_t U64 = ecs_id(ecs_u64_t);
static const flecs::entity_t Uptr = ecs_id(ecs_uptr_t);
static const flecs::entity_t I8 = ecs_id(ecs_i8_t);
static const flecs::entity_t I16 = ecs_id(ecs_i16_t);
static const flecs::entity_t I32 = ecs_id(ecs_i32_t);
static const flecs::entity_t I64 = ecs_id(ecs_i64_t);
static const flecs::entity_t Iptr = ecs_id(ecs_iptr_t);
static const flecs::entity_t F32 = ecs_id(ecs_f32_t);
static const flecs::entity_t F64 = ecs_id(ecs_f64_t);
static const flecs::entity_t String = ecs_id(ecs_string_t);
static const flecs::entity_t Entity = ecs_id(ecs_entity_t);
static const flecs::entity_t Constant = EcsConstant;
static const flecs::entity_t Quantity = EcsQuantity;
namespace meta {
/* Type kinds supported by reflection system */
using type_kind_t = ecs_type_kind_t;
static const type_kind_t PrimitiveType = EcsPrimitiveType;
static const type_kind_t BitmaskType = EcsBitmaskType;
static const type_kind_t EnumType = EcsEnumType;
static const type_kind_t StructType = EcsStructType;
static const type_kind_t ArrayType = EcsArrayType;
static const type_kind_t VectorType = EcsVectorType;
static const type_kind_t CustomType = EcsOpaqueType;
static const type_kind_t TypeKindLast = EcsTypeKindLast;
/* Primitive type kinds supported by reflection system */
using primitive_kind_t = ecs_primitive_kind_t;
static const primitive_kind_t Bool = EcsBool;
static const primitive_kind_t Char = EcsChar;
static const primitive_kind_t Byte = EcsByte;
static const primitive_kind_t U8 = EcsU8;
static const primitive_kind_t U16 = EcsU16;
static const primitive_kind_t U32 = EcsU32;
static const primitive_kind_t U64 = EcsU64;
static const primitive_kind_t I8 = EcsI8;
static const primitive_kind_t I16 = EcsI16;
static const primitive_kind_t I32 = EcsI32;
static const primitive_kind_t I64 = EcsI64;
static const primitive_kind_t F32 = EcsF32;
static const primitive_kind_t F64 = EcsF64;
static const primitive_kind_t UPtr = EcsUPtr;
static const primitive_kind_t IPtr = EcsIPtr;
static const primitive_kind_t String = EcsString;
static const primitive_kind_t Entity = EcsEntity;
static const primitive_kind_t PrimitiveKindLast = EcsPrimitiveKindLast;
/** @} */
namespace _ {
void init(flecs::world& world);
} // namespace _
} // namespace meta
} // namespace flecs
/**
* @file addons/cpp/mixins/meta/opaque.hpp
* @brief Helpers for opaque type registration.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_meta Meta
* @ingroup cpp_addons
* Flecs reflection framework.
*
* @{
*/
/** Class for reading/writing dynamic values.
*
* @ingroup cpp_addons_meta
*/
struct cursor {
cursor(flecs::world_t *world, flecs::entity_t type_id, void *ptr) {
m_cursor = ecs_meta_cursor(world, type_id, ptr);
}
/** Push value scope (such as a nested struct) */
int push() {
return ecs_meta_push(&m_cursor);
}
/** Pop value scope */
int pop() {
return ecs_meta_pop(&m_cursor);
}
/** Move to next member/element */
int next() {
return ecs_meta_next(&m_cursor);
}
/** Move to member by name */
int member(const char *name) {
return ecs_meta_member(&m_cursor, name);
}
/** Move to element by index */
int elem(int32_t elem) {
return ecs_meta_elem(&m_cursor, elem);
}
/** Test if current scope is a collection type */
bool is_collection() {
return ecs_meta_is_collection(&m_cursor);
}
/** Get member name */
flecs::string_view get_member() const {
return flecs::string_view(ecs_meta_get_member(&m_cursor));
}
/** Get type of value */
flecs::entity get_type() const;
/** Get unit of value */
flecs::entity get_unit() const;
/** Get untyped pointer to value */
void* get_ptr() {
return ecs_meta_get_ptr(&m_cursor);
}
/** Set boolean value */
int set_bool(bool value) {
return ecs_meta_set_bool(&m_cursor, value);
}
/** Set char value */
int set_char(char value) {
return ecs_meta_set_char(&m_cursor, value);
}
/** Set signed int value */
int set_int(int64_t value) {
return ecs_meta_set_int(&m_cursor, value);
}
/** Set unsigned int value */
int set_uint(uint64_t value) {
return ecs_meta_set_uint(&m_cursor, value);
}
/** Set float value */
int set_float(double value) {
return ecs_meta_set_float(&m_cursor, value);
}
/** Set string value */
int set_string(const char *value) {
return ecs_meta_set_string(&m_cursor, value);
}
/** Set string literal value */
int set_string_literal(const char *value) {
return ecs_meta_set_string_literal(&m_cursor, value);
}
/** Set entity value */
int set_entity(flecs::entity_t value) {
return ecs_meta_set_entity(&m_cursor, value);
}
/** Set (component) id value */
int set_id(flecs::id_t value) {
return ecs_meta_set_id(&m_cursor, value);
}
/** Set null value */
int set_null() {
return ecs_meta_set_null(&m_cursor);
}
/** Get boolean value */
bool get_bool() const {
return ecs_meta_get_bool(&m_cursor);
}
/** Get char value */
char get_char() const {
return ecs_meta_get_char(&m_cursor);
}
/** Get signed int value */
int64_t get_int() const {
return ecs_meta_get_int(&m_cursor);
}
/** Get unsigned int value */
uint64_t get_uint() const {
return ecs_meta_get_uint(&m_cursor);
}
/** Get float value */
double get_float() const {
return ecs_meta_get_float(&m_cursor);
}
/** Get string value */
const char *get_string() const {
return ecs_meta_get_string(&m_cursor);
}
/** Get entity value */
flecs::entity get_entity() const;
/** Cursor object */
ecs_meta_cursor_t m_cursor;
};
/** @} */
}
/**
* @file addons/cpp/mixins/meta/opaque.hpp
* @brief Helpers for opaque type registration.
*/
#pragma once
#include <stdio.h>
namespace flecs {
/**
* @defgroup cpp_addons_meta Meta
* @ingroup cpp_addons
* Flecs reflection framework.
*
* @{
*/
/** Serializer object, used for serializing opaque types */
using serializer = ecs_serializer_t;
/** Serializer function, used to serialize opaque types */
using serialize_t = ecs_meta_serialize_t;
/** Type safe variant of serializer function */
template <typename T>
using serialize = int(*)(const serializer *, const T*);
/** Type safe interface for opaque types */
template <typename T, typename ElemType = void>
struct opaque {
opaque(flecs::world_t *w = nullptr) : world(w) {
if (world) {
desc.entity = _::cpp_type<T>::id(world);
}
}
/** Type that describes the type kind/structure of the opaque type */
opaque& as_type(flecs::id_t func) {
this->desc.type.as_type = func;
return *this;
}
/** Serialize function */
opaque& serialize(flecs::serialize<T> func) {
this->desc.type.serialize =
reinterpret_cast<decltype(
this->desc.type.serialize)>(func);
return *this;
}
/** Assign bool value */
opaque& assign_bool(void (*func)(T *dst, bool value)) {
this->desc.type.assign_bool =
reinterpret_cast<decltype(
this->desc.type.assign_bool)>(func);
return *this;
}
/** Assign char value */
opaque& assign_char(void (*func)(T *dst, char value)) {
this->desc.type.assign_char =
reinterpret_cast<decltype(
this->desc.type.assign_char)>(func);
return *this;
}
/** Assign int value */
opaque& assign_int(void (*func)(T *dst, int64_t value)) {
this->desc.type.assign_int =
reinterpret_cast<decltype(
this->desc.type.assign_int)>(func);
return *this;
}
/** Assign unsigned int value */
opaque& assign_uint(void (*func)(T *dst, uint64_t value)) {
this->desc.type.assign_uint =
reinterpret_cast<decltype(
this->desc.type.assign_uint)>(func);
return *this;
}
/** Assign float value */
opaque& assign_float(void (*func)(T *dst, double value)) {
this->desc.type.assign_float =
reinterpret_cast<decltype(
this->desc.type.assign_float)>(func);
return *this;
}
/** Assign string value */
opaque& assign_string(void (*func)(T *dst, const char *value)) {
this->desc.type.assign_string =
reinterpret_cast<decltype(
this->desc.type.assign_string)>(func);
return *this;
}
/** Assign entity value */
opaque& assign_entity(
void (*func)(T *dst, ecs_world_t *world, ecs_entity_t entity))
{
this->desc.type.assign_entity =
reinterpret_cast<decltype(
this->desc.type.assign_entity)>(func);
return *this;
}
/** Assign (component) id value */
opaque& assign_id(
void (*func)(T *dst, ecs_world_t *world, ecs_id_t id))
{
this->desc.type.assign_id =
reinterpret_cast<decltype(
this->desc.type.assign_id)>(func);
return *this;
}
/** Assign null value */
opaque& assign_null(void (*func)(T *dst)) {
this->desc.type.assign_null =
reinterpret_cast<decltype(
this->desc.type.assign_null)>(func);
return *this;
}
/** Clear collection elements */
opaque& clear(void (*func)(T *dst)) {
this->desc.type.clear =
reinterpret_cast<decltype(
this->desc.type.clear)>(func);
return *this;
}
/** Ensure & get collection element */
opaque& ensure_element(ElemType* (*func)(T *dst, size_t elem)) {
this->desc.type.ensure_element =
reinterpret_cast<decltype(
this->desc.type.ensure_element)>(func);
return *this;
}
/** Ensure & get element */
opaque& ensure_member(void* (*func)(T *dst, const char *member)) {
this->desc.type.ensure_member =
reinterpret_cast<decltype(
this->desc.type.ensure_member)>(func);
return *this;
}
/** Return number of elements */
opaque& count(size_t (*func)(const T *dst)) {
this->desc.type.count =
reinterpret_cast<decltype(
this->desc.type.count)>(func);
return *this;
}
/** Resize to number of elements */
opaque& resize(void (*func)(T *dst, size_t count)) {
this->desc.type.resize =
reinterpret_cast<decltype(
this->desc.type.resize)>(func);
return *this;
}
~opaque() {
if (world) {
ecs_opaque_init(world, &desc);
}
}
/** Opaque type descriptor */
flecs::world_t *world = nullptr;
ecs_opaque_desc_t desc = {};
};
/** @} */
}
#endif
#ifdef FLECS_UNITS
/**
* @file addons/cpp/mixins/units/decl.hpp
* @brief Units module declarations.
*/
#pragma once
namespace flecs {
struct units {
/**
* @defgroup cpp_addons_units Units
* @ingroup cpp_addons
* Common unit annotations for reflection framework.
*
* @{
*/
struct Prefixes { };
/**
* @defgroup cpp_addons_units_prefixes Prefixes
* @ingroup cpp_addons_units
* Prefixes to indicate unit count (e.g. Kilo, Mega)
*
* @{
*/
struct Yocto { };
struct Zepto { };
struct Atto { };
struct Femto { };
struct Pico { };
struct Nano { };
struct Micro { };
struct Milli { };
struct Centi { };
struct Deci { };
struct Deca { };
struct Hecto { };
struct Kilo { };
struct Mega { };
struct Giga { };
struct Tera { };
struct Peta { };
struct Exa { };
struct Zetta { };
struct Yotta { };
struct Kibi { };
struct Mebi { };
struct Gibi { };
struct Tebi { };
struct Pebi { };
struct Exbi { };
struct Zebi { };
struct Yobi { };
/** @} */
/**
* @defgroup cpp_addons_units_quantities Quantities
* @ingroup cpp_addons_units
* Quantities that group units (e.g. Length)
*
* @{
*/
struct Duration { };
struct Time { };
struct Mass { };
struct ElectricCurrent { };
struct LuminousIntensity { };
struct Force { };
struct Amount { };
struct Length { };
struct Pressure { };
struct Speed { };
struct Temperature { };
struct Data { };
struct DataRate { };
struct Angle { };
struct Frequency { };
struct Uri { };
/** @} */
struct duration {
/**
* @defgroup cpp_addons_units_duration Duration
* @ingroup cpp_addons_units
* @{
*/
struct PicoSeconds { };
struct NanoSeconds { };
struct MicroSeconds { };
struct MilliSeconds { };
struct Seconds { };
struct Minutes { };
struct Hours { };
struct Days { };
/** @} */
};
struct angle {
/**
* @defgroup cpp_addons_units_angle Angle
* @ingroup cpp_addons_units
* @{
*/
struct Radians { };
struct Degrees { };
/** @} */
};
struct time {
/**
* @defgroup cpp_addons_units_time Time
* @ingroup cpp_addons_units
* @{
*/
struct Date { };
/** @} */
};
struct mass {
/**
* @defgroup cpp_addons_units_mass Mass
* @ingroup cpp_addons_units
* @{
*/
struct Grams { };
struct KiloGrams { };
/** @} */
};
struct electric_current {
/**
* @defgroup cpp_addons_units_electric_current Electric Current
* @ingroup cpp_addons_units
* @{
*/
struct Ampere { };
/** @} */
};
struct amount {
/**
* @defgroup cpp_addons_units_amount Amount
* @ingroup cpp_addons_units
* @{
*/
struct Mole { };
/** @} */
};
struct luminous_intensity {
/**
* @defgroup cpp_addons_units_luminous_intensity Luminous Intensity
* @ingroup cpp_addons_units
* @{
*/
struct Candela { };
/** @} */
};
struct force {
/**
* @defgroup cpp_addons_units_force Force
* @ingroup cpp_addons_units
* @{
*/
struct Newton { };
/** @} */
};
struct length {
/**
* @defgroup cpp_addons_units_length Length
* @ingroup cpp_addons_units
* @{
*/
struct Meters { };
struct PicoMeters { };
struct NanoMeters { };
struct MicroMeters { };
struct MilliMeters { };
struct CentiMeters { };
struct KiloMeters { };
struct Miles { };
struct Pixels { };
/** @} */
};
struct pressure {
/**
* @defgroup cpp_addons_units_pressure Pressure
* @ingroup cpp_addons_units
* @{
*/
struct Pascal { };
struct Bar { };
/** @} */
};
struct speed {
/**
* @defgroup cpp_addons_units_speed Speed
* @ingroup cpp_addons_units
* @{
*/
struct MetersPerSecond { };
struct KiloMetersPerSecond { };
struct KiloMetersPerHour { };
struct MilesPerHour { };
/** @} */
};
struct temperature {
/**
* @defgroup cpp_addons_units_temperature Temperature
* @ingroup cpp_addons_units
* @{
*/
struct Kelvin { };
struct Celsius { };
struct Fahrenheit { };
/** @} */
};
struct data {
/**
* @defgroup cpp_addons_units_data Data
* @ingroup cpp_addons_units
* @{
*/
struct Bits { };
struct KiloBits { };
struct MegaBits { };
struct GigaBits { };
struct Bytes { };
struct KiloBytes { };
struct MegaBytes { };
struct GigaBytes { };
struct KibiBytes { };
struct MebiBytes { };
struct GibiBytes { };
/** @} */
};
struct datarate {
/**
* @defgroup cpp_addons_units_datarate Data Rate
* @ingroup cpp_addons_units
* @{
*/
struct BitsPerSecond { };
struct KiloBitsPerSecond { };
struct MegaBitsPerSecond { };
struct GigaBitsPerSecond { };
struct BytesPerSecond { };
struct KiloBytesPerSecond { };
struct MegaBytesPerSecond { };
struct GigaBytesPerSecond { };
/** @} */
};
struct frequency {
/**
* @defgroup cpp_addons_units_frequency Frequency
* @ingroup cpp_addons_units
* @{
*/
struct Hertz { };
struct KiloHertz { };
struct MegaHertz { };
struct GigaHertz { };
/** @} */
};
struct uri {
/**
* @defgroup cpp_addons_units_uri Uri
* @ingroup cpp_addons_units
* @{
*/
struct Hyperlink { };
struct Image { };
struct File { };
/** @} */
};
struct Percentage { };
struct Bel { };
struct DeciBel { };
units(flecs::world& world);
/** @} */
};
}
#endif
#ifdef FLECS_MONITOR
/**
* @file addons/cpp/mixins/monitor/decl.hpp
* @brief Monitor module declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_monitor Monitor
* @ingroup cpp_addons
* The monitor addon periodically tracks statistics for the world and systems.
*
* @{
*/
/** Component that stores world statistics */
using WorldStats = EcsWorldStats;
/** Component that stores system/pipeline statistics */
using PipelineStats = EcsPipelineStats;
struct monitor {
monitor(flecs::world& world);
};
/** @} */
}
#endif
#ifdef FLECS_METRICS
/**
* @file addons/cpp/mixins/metrics/decl.hpp
* @brief Metrics declarations.
*/
#pragma once
/**
* @file addons/cpp/mixins/metrics/builder.hpp
* @brief Metric builder.
*/
#pragma once
#define ECS_EVENT_DESC_ID_COUNT_MAX (8)
namespace flecs {
/**
* @ingroup cpp_addons_metrics
* @{
*/
/** Event builder interface */
struct metric_builder {
metric_builder(flecs::world_t *world, flecs::entity_t entity)
: m_world(world)
{
m_desc.entity = entity;
}
~metric_builder();
metric_builder& member(flecs::entity_t e) {
m_desc.member = e;
return *this;
}
metric_builder& member(const char *name);
template <typename T>
metric_builder& member(const char *name);
metric_builder& dotmember(const char *name);
template <typename T>
metric_builder& dotmember(const char *name);
metric_builder& id(flecs::id_t the_id) {
m_desc.id = the_id;
return *this;
}
metric_builder& id(flecs::entity_t first, flecs::entity_t second) {
m_desc.id = ecs_pair(first, second);
return *this;
}
template <typename T>
metric_builder& id() {
return id(_::cpp_type<T>::id(m_world));
}
template <typename First>
metric_builder& id(flecs::entity_t second) {
return id(_::cpp_type<First>::id(m_world), second);
}
template <typename Second>
metric_builder& id_second(flecs::entity_t first) {
return id(first, _::cpp_type<Second>::id(m_world));
}
template <typename First, typename Second>
metric_builder& id() {
return id<First>(_::cpp_type<Second>::id(m_world));
}
metric_builder& targets(bool value = true) {
m_desc.targets = value;
return *this;
}
metric_builder& kind(flecs::entity_t the_kind) {
m_desc.kind = the_kind;
return *this;
}
template <typename Kind>
metric_builder& kind() {
return kind(_::cpp_type<Kind>::id(m_world));
}
metric_builder& brief(const char *b) {
m_desc.brief = b;
return *this;
}
operator flecs::entity();
protected:
flecs::world_t *m_world;
ecs_metric_desc_t m_desc = {};
bool m_created = false;
};
/**
* @}
*/
}
namespace flecs {
/**
* @defgroup cpp_addons_metrics Metrics
* @ingroup cpp_addons
* The metrics module extracts metrics from components and makes them available
* through a unified component interface.
*
* @{
*/
struct metrics {
using Value = EcsMetricValue;
using Source = EcsMetricSource;
struct Instance { };
struct Metric { };
struct Counter { };
struct CounterIncrement { };
struct CounterId { };
struct Gauge { };
metrics(flecs::world& world);
};
/** @} */
}
#endif
#ifdef FLECS_ALERTS
/**
* @file addons/cpp/mixins/alerts/decl.hpp
* @brief Alert declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_alerts Alerts
* @ingroup cpp_addons
* Alert implementation.
*
* @{
*/
/** Module */
struct alerts {
using AlertsActive = EcsAlertsActive;
using Instance = EcsAlertInstance;
struct Alert { };
struct Info { };
struct Warning { };
struct Error { };
alerts(flecs::world& world);
};
template <typename ... Components>
struct alert;
template <typename ... Components>
struct alert_builder;
/** @} */
}
#endif
#ifdef FLECS_JSON
/**
* @file addons/cpp/mixins/json/decl.hpp
* @brief JSON addon declarations.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_json Json
* @ingroup cpp_addons
* Functions for serializing to/from JSON.
*
* @{
*/
using from_json_desc_t = ecs_from_json_desc_t;
using entity_to_json_desc_t = ecs_entity_to_json_desc_t;
using iter_to_json_desc_t = ecs_iter_to_json_desc_t;
/** @} */
}
#endif
#ifdef FLECS_APP
/**
* @file addons/cpp/mixins/app/decl.hpp
* @brief App addon declarations.
*/
#pragma once
/**
* @file addons/cpp/mixins/app/builder.hpp
* @brief App builder.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_addons_app App
* @ingroup cpp_addons
* Optional addon for running the main application loop.
*
* @{
*/
/** App builder interface */
struct app_builder {
app_builder(flecs::world_t *world)
: m_world(world)
, m_desc{}
{
const ecs_world_info_t *stats = ecs_get_world_info(world);
m_desc.target_fps = stats->target_fps;
ecs_ftime_t t_zero = 0.0;
if (ECS_EQ(m_desc.target_fps, t_zero)) {
m_desc.target_fps = 60;
}
}
app_builder& target_fps(ecs_ftime_t value) {
m_desc.target_fps = value;
return *this;
}
app_builder& delta_time(ecs_ftime_t value) {
m_desc.delta_time = value;
return *this;
}
app_builder& threads(int32_t value) {
m_desc.threads = value;
return *this;
}
app_builder& frames(int32_t value) {
m_desc.frames = value;
return *this;
}
app_builder& enable_rest(uint16_t port = 0) {
m_desc.enable_rest = true;
m_desc.port = port;
return *this;
}
app_builder& enable_monitor(bool value = true) {
m_desc.enable_monitor = value;
return *this;
}
app_builder& init(ecs_app_init_action_t value) {
m_desc.init = value;
return *this;
}
app_builder& ctx(void *value) {
m_desc.ctx = value;
return *this;
}
int run() {
int result = ecs_app_run(m_world, &m_desc);
if (ecs_should_quit(m_world)) {
// Only free world if quit flag is set. This ensures that we won't
// try to cleanup the world if the app is used in an environment
// that takes over the main loop, like with emscripten.
ecs_fini(m_world);
}
return result;
}
private:
flecs::world_t *m_world;
ecs_app_desc_t m_desc;
};
/** @} */
}
#endif
/**
* @file addons/cpp/log.hpp
* @brief Logging functions.
*/
#pragma once
namespace flecs {
namespace log {
/**
* @defgroup cpp_log Logging
* @ingroup cpp_addons
* Logging functions.
*
* @{
*/
/** Set log level */
inline void set_level(int level) {
ecs_log_set_level(level);
}
inline int get_level() {
return ecs_log_get_level();
}
/** Enable colors in logging */
inline void enable_colors(bool enabled = true) {
ecs_log_enable_colors(enabled);
}
/** Enable timestamps in logging */
inline void enable_timestamp(bool enabled = true) {
ecs_log_enable_timestamp(enabled);
}
/** Enable time delta in logging */
inline void enable_timedelta(bool enabled = true) {
ecs_log_enable_timedelta(enabled);
}
/** Debug trace (level 1) */
inline void dbg(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
ecs_logv(1, fmt, args);
va_end(args);
}
/** Trace (level 0) */
inline void trace(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
ecs_logv(0, fmt, args);
va_end(args);
}
/** Trace (level -2) */
inline void warn(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
ecs_logv(-2, fmt, args);
va_end(args);
}
/** Trace (level -3) */
inline void err(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
ecs_logv(-3, fmt, args);
va_end(args);
}
/** Increase log indentation */
inline void push(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
ecs_logv(0, fmt, args);
va_end(args);
ecs_log_push();
}
/** Increase log indentation */
inline void push() {
ecs_log_push();
}
/** Increase log indentation */
inline void pop() {
ecs_log_pop();
}
/** @} */
}
}
/**
* @file addons/cpp/pair.hpp
* @brief Utilities for working with compile time pairs.
*/
#pragma once
namespace flecs {
namespace _ {
struct pair_base { };
} // _
/**
* @defgroup cpp_pair_type Pair type
* @ingroup cpp_core
* Compile time utilities for working with relationship pairs.
*
* @{
*/
/** Type that represents a pair.
* The pair type can be used to represent a pair at compile time, and is able
* to automatically derive the storage type associated with the pair, accessible
* through pair::type.
*
* The storage type is derived using the following rules:
* - if pair::first is non-empty, the storage type is pair::first
* - if pair::first is empty and pair::second is non-empty, the storage type is pair::second
*
* The pair type can hold a temporary value so that it can be used in the
* signatures of queries
*/
template <typename First, typename Second>
struct pair : _::pair_base {
using type = conditional_t<!is_empty<First>::value || is_empty<Second>::value, First, Second>;
using first = First;
using second = Second;
pair(type& v) : ref_(v) { }
// This allows the class to be used as a temporary object
pair(const type& v) : ref_(const_cast<type&>(v)) { }
operator type&() {
return ref_;
}
operator const type&() const {
return ref_;
}
type* operator->() {
return &ref_;
}
const type* operator->() const {
return &ref_;
}
type& operator*() {
return ref_;
}
const type& operator*() const {
return ref_;
}
private:
type& ref_;
};
template <typename First, typename Second, if_t<is_empty<First>::value> = 0>
using pair_object = pair<First, Second>;
template <typename T>
using raw_type_t = remove_pointer_t<remove_reference_t<T>>;
/** Test if type is a pair. */
template <typename T>
struct is_pair {
static constexpr bool value = is_base_of<_::pair_base, raw_type_t<T> >::value;
};
/** Get pair::first from pair while preserving cv qualifiers. */
template <typename P>
using pair_first_t = transcribe_cv_t<remove_reference_t<P>, typename raw_type_t<P>::first>;
/** Get pair::second from pair while preserving cv qualifiers. */
template <typename P>
using pair_second_t = transcribe_cv_t<remove_reference_t<P>, typename raw_type_t<P>::second>;
/** Get pair::type type from pair while preserving cv qualifiers and pointer type. */
template <typename P>
using pair_type_t = transcribe_cvp_t<remove_reference_t<P>, typename raw_type_t<P>::type>;
/** Get actual type from a regular type or pair. */
template <typename T, typename U = int>
struct actual_type;
template <typename T>
struct actual_type<T, if_not_t< is_pair<T>::value >> {
using type = T;
};
template <typename T>
struct actual_type<T, if_t< is_pair<T>::value >> {
using type = pair_type_t<T>;
};
template <typename T>
using actual_type_t = typename actual_type<T>::type;
// Get type without const, *, &
template<typename T>
struct base_type {
using type = decay_t< remove_pointer_t< actual_type_t<T> > >;
};
template <typename T>
using base_type_t = typename base_type<T>::type;
// Get type without *, & (retains const which is useful for function args)
template<typename T>
struct base_arg_type {
using type = remove_pointer_t< remove_reference_t< actual_type_t<T> > >;
};
template <typename T>
using base_arg_type_t = typename base_arg_type<T>::type;
// Test if type is the same as its actual type
template <typename T>
struct is_actual {
static constexpr bool value =
std::is_same<T, actual_type_t<T> >::value && !is_enum<T>::value;
};
} // flecs
/**
* @file addons/cpp/lifecycle_traits.hpp
* @brief Utilities for discovering and registering component lifecycle hooks.
*/
#pragma once
namespace flecs
{
namespace _
{
inline void ecs_ctor_illegal(void *, int32_t, const ecs_type_info_t *ti) {
ecs_abort(ECS_INVALID_OPERATION, "invalid constructor for %s", ti->name);
}
inline void ecs_dtor_illegal(void *, int32_t, const ecs_type_info_t *ti) {
ecs_abort(ECS_INVALID_OPERATION, "invalid destructor for %s", ti->name);
}
inline void ecs_copy_illegal(
void *, const void *, int32_t, const ecs_type_info_t *ti)
{
ecs_abort(ECS_INVALID_OPERATION, "invalid copy assignment for %s", ti->name);
}
inline void ecs_move_illegal(void *, void *, int32_t, const ecs_type_info_t *ti) {
ecs_abort(ECS_INVALID_OPERATION, "invalid move assignment for %s", ti->name);
}
inline void ecs_copy_ctor_illegal(
void *, const void *, int32_t, const ecs_type_info_t *ti)
{
ecs_abort(ECS_INVALID_OPERATION, "invalid copy construct for %s", ti->name);
}
inline void ecs_move_ctor_illegal(
void *, void *, int32_t, const ecs_type_info_t *ti)
{
ecs_abort(ECS_INVALID_OPERATION, "invalid move construct for %s", ti->name);
}
// T()
// Can't coexist with T(flecs::entity) or T(flecs::world, flecs::entity)
template <typename T>
void ctor_impl(void *ptr, int32_t count, const ecs_type_info_t *info) {
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *arr = static_cast<T*>(ptr);
for (int i = 0; i < count; i ++) {
FLECS_PLACEMENT_NEW(&arr[i], T);
}
}
// ~T()
template <typename T>
void dtor_impl(void *ptr, int32_t count, const ecs_type_info_t *info) {
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *arr = static_cast<T*>(ptr);
for (int i = 0; i < count; i ++) {
arr[i].~T();
}
}
// T& operator=(const T&)
template <typename T>
void copy_impl(void *dst_ptr, const void *src_ptr, int32_t count,
const ecs_type_info_t *info)
{
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *dst_arr = static_cast<T*>(dst_ptr);
const T *src_arr = static_cast<const T*>(src_ptr);
for (int i = 0; i < count; i ++) {
dst_arr[i] = src_arr[i];
}
}
// T& operator=(T&&)
template <typename T>
void move_impl(void *dst_ptr, void *src_ptr, int32_t count,
const ecs_type_info_t *info)
{
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *dst_arr = static_cast<T*>(dst_ptr);
T *src_arr = static_cast<T*>(src_ptr);
for (int i = 0; i < count; i ++) {
dst_arr[i] = FLECS_MOV(src_arr[i]);
}
}
// T(T&)
template <typename T>
void copy_ctor_impl(void *dst_ptr, const void *src_ptr, int32_t count,
const ecs_type_info_t *info)
{
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *dst_arr = static_cast<T*>(dst_ptr);
const T *src_arr = static_cast<const T*>(src_ptr);
for (int i = 0; i < count; i ++) {
FLECS_PLACEMENT_NEW(&dst_arr[i], T(src_arr[i]));
}
}
// T(T&&)
template <typename T>
void move_ctor_impl(void *dst_ptr, void *src_ptr, int32_t count,
const ecs_type_info_t *info)
{
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *dst_arr = static_cast<T*>(dst_ptr);
T *src_arr = static_cast<T*>(src_ptr);
for (int i = 0; i < count; i ++) {
FLECS_PLACEMENT_NEW(&dst_arr[i], T(FLECS_MOV(src_arr[i])));
}
}
// T(T&&), ~T()
// Typically used when moving to a new table, and removing from the old table
template <typename T>
void ctor_move_dtor_impl(void *dst_ptr, void *src_ptr, int32_t count,
const ecs_type_info_t *info)
{
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *dst_arr = static_cast<T*>(dst_ptr);
T *src_arr = static_cast<T*>(src_ptr);
for (int i = 0; i < count; i ++) {
FLECS_PLACEMENT_NEW(&dst_arr[i], T(FLECS_MOV(src_arr[i])));
src_arr[i].~T();
}
}
// Move assign + dtor (non-trivial move assignment)
// Typically used when moving a component to a deleted component
template <typename T, if_not_t<
std::is_trivially_move_assignable<T>::value > = 0>
void move_dtor_impl(void *dst_ptr, void *src_ptr, int32_t count,
const ecs_type_info_t *info)
{
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *dst_arr = static_cast<T*>(dst_ptr);
T *src_arr = static_cast<T*>(src_ptr);
for (int i = 0; i < count; i ++) {
// Move assignment should free dst & assign dst to src
dst_arr[i] = FLECS_MOV(src_arr[i]);
// Destruct src. Move should have left object in a state where it no
// longer holds resources, but it still needs to be destructed.
src_arr[i].~T();
}
}
// Move assign + dtor (trivial move assignment)
// Typically used when moving a component to a deleted component
template <typename T, if_t<
std::is_trivially_move_assignable<T>::value > = 0>
void move_dtor_impl(void *dst_ptr, void *src_ptr, int32_t count,
const ecs_type_info_t *info)
{
(void)info; ecs_assert(info->size == ECS_SIZEOF(T),
ECS_INTERNAL_ERROR, NULL);
T *dst_arr = static_cast<T*>(dst_ptr);
T *src_arr = static_cast<T*>(src_ptr);
for (int i = 0; i < count; i ++) {
// Cleanup resources of dst
dst_arr[i].~T();
// Copy src to dst
dst_arr[i] = FLECS_MOV(src_arr[i]);
// No need to destruct src. Since this is a trivial move the code
// should be agnostic to the address of the component which means we
// can pretend nothing got destructed.
}
}
} // _
// Trait to test if type is constructible by flecs
template <typename T>
struct is_flecs_constructible {
static constexpr bool value =
std::is_default_constructible<actual_type_t<T>>::value;
};
namespace _
{
// Trivially constructible
template <typename T, if_t< std::is_trivially_constructible<T>::value > = 0>
ecs_xtor_t ctor() {
return nullptr;
}
// Not constructible by flecs
template <typename T, if_t<
! std::is_default_constructible<T>::value > = 0>
ecs_xtor_t ctor() {
return ecs_ctor_illegal;
}
// Default constructible
template <typename T, if_t<
! std::is_trivially_constructible<T>::value &&
std::is_default_constructible<T>::value > = 0>
ecs_xtor_t ctor() {
return ctor_impl<T>;
}
// No dtor
template <typename T, if_t< std::is_trivially_destructible<T>::value > = 0>
ecs_xtor_t dtor() {
return nullptr;
}
// Dtor
template <typename T, if_t<
std::is_destructible<T>::value &&
! std::is_trivially_destructible<T>::value > = 0>
ecs_xtor_t dtor() {
return dtor_impl<T>;
}
// Assert when the type cannot be destructed
template <typename T, if_not_t< std::is_destructible<T>::value > = 0>
ecs_xtor_t dtor() {
flecs_static_assert(always_false<T>::value,
"component type must be destructible");
return ecs_dtor_illegal;
}
// Trivially copyable
template <typename T, if_t< std::is_trivially_copyable<T>::value > = 0>
ecs_copy_t copy() {
return nullptr;
}
// Not copyable
template <typename T, if_t<
! std::is_trivially_copyable<T>::value &&
! std::is_copy_assignable<T>::value > = 0>
ecs_copy_t copy() {
return ecs_copy_illegal;
}
// Copy assignment
template <typename T, if_t<
std::is_copy_assignable<T>::value &&
! std::is_trivially_copyable<T>::value > = 0>
ecs_copy_t copy() {
return copy_impl<T>;
}
// Trivially move assignable
template <typename T, if_t< std::is_trivially_move_assignable<T>::value > = 0>
ecs_move_t move() {
return nullptr;
}
// Component types must be move assignable
template <typename T, if_not_t< std::is_move_assignable<T>::value > = 0>
ecs_move_t move() {
flecs_static_assert(always_false<T>::value,
"component type must be move assignable");
return ecs_move_illegal;
}
// Move assignment
template <typename T, if_t<
std::is_move_assignable<T>::value &&
! std::is_trivially_move_assignable<T>::value > = 0>
ecs_move_t move() {
return move_impl<T>;
}
// Trivially copy constructible
template <typename T, if_t<
std::is_trivially_copy_constructible<T>::value > = 0>
ecs_copy_t copy_ctor() {
return nullptr;
}
// No copy ctor
template <typename T, if_t< ! std::is_copy_constructible<T>::value > = 0>
ecs_copy_t copy_ctor() {
return ecs_copy_ctor_illegal;
}
// Copy ctor
template <typename T, if_t<
std::is_copy_constructible<T>::value &&
! std::is_trivially_copy_constructible<T>::value > = 0>
ecs_copy_t copy_ctor() {
return copy_ctor_impl<T>;
}
// Trivially move constructible
template <typename T, if_t<
std::is_trivially_move_constructible<T>::value > = 0>
ecs_move_t move_ctor() {
return nullptr;
}
// Component types must be move constructible
template <typename T, if_not_t< std::is_move_constructible<T>::value > = 0>
ecs_move_t move_ctor() {
flecs_static_assert(always_false<T>::value,
"component type must be move constructible");
return ecs_move_ctor_illegal;
}
// Move ctor
template <typename T, if_t<
std::is_move_constructible<T>::value &&
! std::is_trivially_move_constructible<T>::value > = 0>
ecs_move_t move_ctor() {
return move_ctor_impl<T>;
}
// Trivial merge (move assign + dtor)
template <typename T, if_t<
std::is_trivially_move_constructible<T>::value &&
std::is_trivially_destructible<T>::value > = 0>
ecs_move_t ctor_move_dtor() {
return nullptr;
}
// Component types must be move constructible and destructible
template <typename T, if_t<
! std::is_move_constructible<T>::value ||
! std::is_destructible<T>::value > = 0>
ecs_move_t ctor_move_dtor() {
flecs_static_assert(always_false<T>::value,
"component type must be move constructible and destructible");
return ecs_move_ctor_illegal;
}
// Merge ctor + dtor
template <typename T, if_t<
!(std::is_trivially_move_constructible<T>::value &&
std::is_trivially_destructible<T>::value) &&
std::is_move_constructible<T>::value &&
std::is_destructible<T>::value > = 0>
ecs_move_t ctor_move_dtor() {
return ctor_move_dtor_impl<T>;
}
// Trivial merge (move assign + dtor)
template <typename T, if_t<
std::is_trivially_move_assignable<T>::value &&
std::is_trivially_destructible<T>::value > = 0>
ecs_move_t move_dtor() {
return nullptr;
}
// Component types must be move constructible and destructible
template <typename T, if_t<
! std::is_move_assignable<T>::value ||
! std::is_destructible<T>::value > = 0>
ecs_move_t move_dtor() {
flecs_static_assert(always_false<T>::value,
"component type must be move constructible and destructible");
return ecs_move_ctor_illegal;
}
// Merge assign + dtor
template <typename T, if_t<
!(std::is_trivially_move_assignable<T>::value &&
std::is_trivially_destructible<T>::value) &&
std::is_move_assignable<T>::value &&
std::is_destructible<T>::value > = 0>
ecs_move_t move_dtor() {
return move_dtor_impl<T>;
}
} // _
} // flecs
/**
* @file addons/cpp/ref.hpp
* @brief Class that caches data to speedup get operations.
*/
#pragma once
namespace flecs
{
/**
* @defgroup cpp_ref Refs
* @ingroup cpp_core
* Refs are a fast mechanism for referring to a specific entity/component.
*
* @{
*/
/** Component reference.
* Reference to a component from a specific entity.
*/
template <typename T>
struct ref {
ref() : m_world(nullptr), m_ref{} { }
ref(world_t *world, entity_t entity, flecs::id_t id = 0)
: m_ref()
{
// the world we were called with may be a stage; convert it to a world
// here if that is the case
m_world = world ? const_cast<flecs::world_t *>(ecs_get_world(world))
: nullptr;
if (!id) {
id = _::cpp_type<T>::id(world);
}
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
m_ref = ecs_ref_init_id(m_world, entity, id);
}
T* operator->() {
T* result = static_cast<T*>(ecs_ref_get_id(
m_world, &m_ref, this->m_ref.id));
ecs_assert(result != NULL, ECS_INVALID_PARAMETER, NULL);
return result;
}
T* get() {
return static_cast<T*>(ecs_ref_get_id(
m_world, &m_ref, this->m_ref.id));
}
T* try_get() {
if (!m_world || !m_ref.entity) {
return nullptr;
}
return get();
}
flecs::entity entity() const;
private:
world_t *m_world;
flecs::ref_t m_ref;
};
/** @} */
}
/**
* @file addons/cpp/world.hpp
* @brief World class.
*/
#pragma once
namespace flecs
{
/* Static helper functions to assign a component value */
// set(T&&), T = constructible
template <typename T, if_t< is_flecs_constructible<T>::value > = 0>
inline void set(world_t *world, flecs::entity_t entity, T&& value, flecs::id_t id) {
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
if (!ecs_is_deferred(world)) {
T& dst = *static_cast<T*>(ecs_get_mut_id(world, entity, id));
dst = FLECS_MOV(value);
ecs_modified_id(world, entity, id);
} else {
T& dst = *static_cast<T*>(ecs_get_mut_modified_id(world, entity, id));
dst = FLECS_MOV(value);
}
}
// set(const T&), T = constructible
template <typename T, if_t< is_flecs_constructible<T>::value > = 0>
inline void set(world_t *world, flecs::entity_t entity, const T& value, flecs::id_t id) {
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
if (!ecs_is_deferred(world)) {
T& dst = *static_cast<T*>(ecs_get_mut_id(world, entity, id));
dst = FLECS_MOV(value);
ecs_modified_id(world, entity, id);
} else {
T& dst = *static_cast<T*>(ecs_get_mut_modified_id(world, entity, id));
dst = FLECS_MOV(value);
}
}
// set(T&&), T = not constructible
template <typename T, if_not_t< is_flecs_constructible<T>::value > = 0>
inline void set(world_t *world, flecs::entity_t entity, T&& value, flecs::id_t id) {
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
if (!ecs_is_deferred(world)) {
T& dst = *static_cast<remove_reference_t<T>*>(ecs_get_mut_id(world, entity, id));
dst = FLECS_MOV(value);
ecs_modified_id(world, entity, id);
} else {
T& dst = *static_cast<remove_reference_t<T>*>(ecs_get_mut_modified_id(world, entity, id));
dst = FLECS_MOV(value);
}
}
// set(const T&), T = not constructible
template <typename T, if_not_t< is_flecs_constructible<T>::value > = 0>
inline void set(world_t *world, flecs::entity_t entity, const T& value, flecs::id_t id) {
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
if (!ecs_is_deferred(world)) {
T& dst = *static_cast<remove_reference_t<T>*>(ecs_get_mut_id(world, entity, id));
dst = FLECS_MOV(value);
ecs_modified_id(world, entity, id);
} else {
T& dst = *static_cast<remove_reference_t<T>*>(ecs_get_mut_modified_id(world, entity, id));
dst = FLECS_MOV(value);
}
}
// emplace for T(Args...)
template <typename T, typename ... Args, if_t<
std::is_constructible<actual_type_t<T>, Args...>::value ||
std::is_default_constructible<actual_type_t<T>>::value > = 0>
inline void emplace(world_t *world, flecs::entity_t entity, flecs::id_t id, Args&&... args) {
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
T& dst = *static_cast<T*>(ecs_emplace_id(world, entity, id));
FLECS_PLACEMENT_NEW(&dst, T{FLECS_FWD(args)...});
ecs_modified_id(world, entity, id);
}
// set(T&&)
template <typename T, typename A>
inline void set(world_t *world, entity_t entity, A&& value) {
id_t id = _::cpp_type<T>::id(world);
flecs::set(world, entity, FLECS_FWD(value), id);
}
// set(const T&)
template <typename T, typename A>
inline void set(world_t *world, entity_t entity, const A& value) {
id_t id = _::cpp_type<T>::id(world);
flecs::set(world, entity, value, id);
}
/** Return id without generation.
*
* @see ecs_strip_generation
*/
inline flecs::id_t strip_generation(flecs::entity_t e) {
return ecs_strip_generation(e);
}
/** Return entity generation.
*/
inline uint32_t get_generation(flecs::entity_t e) {
return ECS_GENERATION(e);
}
struct scoped_world;
/**
* @defgroup cpp_world World
* @ingroup cpp_core
* World operations.
*
* @{
*/
/** The world.
* The world is the container of all ECS data and systems. If the world is
* deleted, all data in the world will be deleted as well.
*/
struct world {
/** Create world.
*/
explicit world()
: m_world( ecs_init() )
, m_owned( true ) { init_builtin_components(); }
/** Create world with command line arguments.
* Currently command line arguments are not interpreted, but they may be
* used in the future to configure Flecs parameters.
*/
explicit world(int argc, char *argv[])
: m_world( ecs_init_w_args(argc, argv) )
, m_owned( true ) { init_builtin_components(); }
/** Create world from C world.
*/
explicit world(world_t *w)
: m_world( w )
, m_owned( false ) { }
/** Not allowed to copy a world. May only take a reference.
*/
world(const world& obj) = delete;
world(world&& obj) noexcept {
m_world = obj.m_world;
m_owned = obj.m_owned;
obj.m_world = nullptr;
obj.m_owned = false;
}
/* Implicit conversion to world_t* */
operator world_t*() const { return m_world; }
/** Not allowed to copy a world. May only take a reference.
*/
world& operator=(const world& obj) = delete;
world& operator=(world&& obj) noexcept {
this->~world();
m_world = obj.m_world;
m_owned = obj.m_owned;
obj.m_world = nullptr;
obj.m_owned = false;
return *this;
}
~world() {
if (m_owned && ecs_stage_is_async(m_world)) {
ecs_async_stage_free(m_world);
} else
if (m_owned && m_world) {
ecs_fini(m_world);
}
}
/** Deletes and recreates the world. */
void reset() {
// Can only reset the world if we own the world object.
ecs_assert(this->m_owned, ECS_INVALID_OPERATION, NULL);
ecs_fini(m_world);
m_world = ecs_init();
}
/** Obtain pointer to C world object.
*/
world_t* c_ptr() const {
return m_world;
}
/** Signal application should quit.
* After calling this operation, the next call to progress() returns false.
*/
void quit() const {
ecs_quit(m_world);
}
/** Register action to be executed when world is destroyed.
*/
void atfini(ecs_fini_action_t action, void *ctx) const {
ecs_atfini(m_world, action, ctx);
}
/** Test if quit() has been called.
*/
bool should_quit() const {
return ecs_should_quit(m_world);
}
/** Begin frame.
* When an application does not use progress() to control the main loop, it
* can still use Flecs features such as FPS limiting and time measurements.
* This operation needs to be invoked whenever a new frame is about to get
* processed.
*
* Calls to frame_begin must always be followed by frame_end.
*
* The function accepts a delta_time parameter, which will get passed to
* systems. This value is also used to compute the amount of time the
* function needs to sleep to ensure it does not exceed the target_fps, when
* it is set. When 0 is provided for delta_time, the time will be measured.
*
* This function should only be ran from the main thread.
*
* @param delta_time Time elapsed since the last frame.
* @return The provided delta_time, or measured time if 0 was provided.
*/
ecs_ftime_t frame_begin(float delta_time = 0) const {
return ecs_frame_begin(m_world, delta_time);
}
/** End frame.
* This operation must be called at the end of the frame, and always after
* ecs_frame_begin.
*
* This function should only be ran from the main thread.
*/
void frame_end() const {
ecs_frame_end(m_world);
}
/** Begin staging.
* When an application does not use ecs_progress to control the main loop, it
* can still use Flecs features such as the defer queue. When an application
* needs to stage changes, it needs to call this function after ecs_frame_begin.
* A call to ecs_readonly_begin must be followed by a call to ecs_readonly_end.
*
* When staging is enabled, modifications to entities are stored to a stage.
* This ensures that arrays are not modified while iterating. Modifications are
* merged back to the "main stage" when ecs_readonly_end is invoked.
*
* While the world is in staging mode, no structural changes (add/remove/...)
* can be made to the world itself. Operations must be executed on a stage
* instead (see ecs_get_stage).
*
* This function should only be ran from the main thread.
*
* @return Whether world is currently staged.
*/
bool readonly_begin() const {
return ecs_readonly_begin(m_world);
}
/** End staging.
* Leaves staging mode. After this operation the world may be directly mutated
* again. By default this operation also merges data back into the world, unless
* auto-merging was disabled explicitly.
*
* This function should only be ran from the main thread.
*/
void readonly_end() const {
ecs_readonly_end(m_world);
}
/** Defer operations until end of frame.
* When this operation is invoked while iterating, operations inbetween the
* defer_begin and defer_end operations are executed at the end of the frame.
*
* This operation is thread safe.
*/
bool defer_begin() const {
return ecs_defer_begin(m_world);
}
/** End block of operations to defer.
* See defer_begin.
*
* This operation is thread safe.
*/
bool defer_end() const {
return ecs_defer_end(m_world);
}
/** Test whether deferring is enabled.
*/
bool is_deferred() const {
return ecs_is_deferred(m_world);
}
/** Configure world to have N stages.
* This initializes N stages, which allows applications to defer operations to
* multiple isolated defer queues. This is typically used for applications with
* multiple threads, where each thread gets its own queue, and commands are
* merged when threads are synchronized.
*
* Note that set_threads() already creates the appropriate number of stages.
* The set_stage_count() operation is useful for applications that want to manage
* their own stages and/or threads.
*
* @param stages The number of stages.
*/
void set_stage_count(int32_t stages) const {
ecs_set_stage_count(m_world, stages);
}
/** Get number of configured stages.
* Return number of stages set by set_stage_count.
*
* @return The number of stages used for threading.
*/
int32_t get_stage_count() const {
return ecs_get_stage_count(m_world);
}
/** Get current stage id.
* The stage id can be used by an application to learn about which stage it
* is using, which typically corresponds with the worker thread id.
*
* @return The stage id.
*/
int32_t get_stage_id() const {
return ecs_get_stage_id(m_world);
}
/** Test if is a stage.
* If this function returns false, it is guaranteed that this is a valid
* world object.
*
* @return True if the world is a stage, false if not.
*/
bool is_stage() const {
ecs_assert(
ecs_poly_is(m_world, ecs_world_t) ||
ecs_poly_is(m_world, ecs_stage_t),
ECS_INVALID_PARAMETER, NULL);
return ecs_poly_is(m_world, ecs_stage_t);
}
/** Enable/disable auto-merging for world or stage.
* When auto-merging is enabled, staged data will automatically be merged
* with the world when staging ends. This happens at the end of progress(),
* at a sync point or when readonly_end() is called.
*
* Applications can exercise more control over when data from a stage is
* merged by disabling auto-merging. This requires an application to
* explicitly call merge() on the stage.
*
* When this function is invoked on the world, it sets all current stages to
* the provided value and sets the default for new stages. When this
* function is invoked on a stage, auto-merging is only set for that specific
* stage.
*
* @param automerge Whether to enable or disable auto-merging.
*/
void set_automerge(bool automerge) const {
ecs_set_automerge(m_world, automerge);
}
/** Merge world or stage.
* When automatic merging is disabled, an application can call this
* operation on either an individual stage, or on the world which will merge
* all stages. This operation may only be called when staging is not enabled
* (either after progress() or after readonly_end()).
*
* This operation may be called on an already merged stage or world.
*/
void merge() const {
ecs_merge(m_world);
}
/** Get stage-specific world pointer.
* Flecs threads can safely invoke the API as long as they have a private
* context to write to, also referred to as the stage. This function returns a
* pointer to a stage, disguised as a world pointer.
*
* Note that this function does not(!) create a new world. It simply wraps the
* existing world in a thread-specific context, which the API knows how to
* unwrap. The reason the stage is returned as an ecs_world_t is so that it
* can be passed transparently to the existing API functions, vs. having to
* create a dediated API for threading.
*
* @param stage_id The index of the stage to retrieve.
* @return A thread-specific pointer to the world.
*/
flecs::world get_stage(int32_t stage_id) const {
return flecs::world(ecs_get_stage(m_world, stage_id));
}
/** Create asynchronous stage.
* An asynchronous stage can be used to asynchronously queue operations for
* later merging with the world. An asynchronous stage is similar to a regular
* stage, except that it does not allow reading from the world.
*
* Asynchronous stages are never merged automatically, and must therefore be
* manually merged with the ecs_merge function. It is not necessary to call
* defer_begin or defer_end before and after enqueuing commands, as an
* asynchronous stage unconditionally defers operations.
*
* The application must ensure that no commands are added to the stage while the
* stage is being merged.
*
* An asynchronous stage must be cleaned up by ecs_async_stage_free.
*
* @return The stage.
*/
flecs::world async_stage() const {
auto result = flecs::world(ecs_async_stage_new(m_world));
result.m_owned = true;
return result;
}
/** Get actual world.
* If the current object points to a stage, this operation will return the
* actual world.
*
* @return The actual world.
*/
flecs::world get_world() const {
/* Safe cast, mutability is checked */
return flecs::world(
m_world ? const_cast<flecs::world_t*>(ecs_get_world(m_world)) : nullptr);
}
/** Test whether the current world object is readonly.
* This function allows the code to test whether the currently used world
* object is readonly or whether it allows for writing.
*
* @return True if the world or stage is readonly.
*/
bool is_readonly() const {
return ecs_stage_is_readonly(m_world);
}
/** Set world context.
* Set a context value that can be accessed by anyone that has a reference
* to the world.
*
* @param ctx The world context.
*/
void set_ctx(void* ctx, ecs_ctx_free_t ctx_free = nullptr) const {
ecs_set_ctx(m_world, ctx, ctx_free);
}
/** Get world context.
*
* @return The configured world context.
*/
void* get_ctx() const {
return ecs_get_ctx(m_world);
}
/** Set world binding context.
* Set a context value that can be accessed by anyone that has a reference
* to the world.
*
* @param ctx The world context.
*/
void set_binding_ctx(void* ctx, ecs_ctx_free_t ctx_free = nullptr) const {
ecs_set_binding_ctx(m_world, ctx, ctx_free);
}
/** Get world binding context.
*
* @return The configured world context.
*/
void* get_binding_ctx() const {
return ecs_get_binding_ctx(m_world);
}
/** Preallocate memory for number of entities.
* This function preallocates memory for the entity index.
*
* @param entity_count Number of entities to preallocate memory for.
*/
void dim(int32_t entity_count) const {
ecs_dim(m_world, entity_count);
}
/** Set entity range.
* This function limits the range of issued entity ids between min and max.
*
* @param min Minimum entity id issued.
* @param max Maximum entity id issued.
*/
void set_entity_range(entity_t min, entity_t max) const {
ecs_set_entity_range(m_world, min, max);
}
/** Enforce that operations cannot modify entities outside of range.
* This function ensures that only entities within the specified range can
* be modified. Use this function if specific parts of the code only are
* allowed to modify a certain set of entities, as could be the case for
* networked applications.
*
* @param enabled True if range check should be enabled, false if not.
*/
void enable_range_check(bool enabled) const {
ecs_enable_range_check(m_world, enabled);
}
/** Set current scope.
*
* @param scope The scope to set.
* @return The current scope;
* @see ecs_set_scope
*/
flecs::entity set_scope(const flecs::entity_t scope) const;
/** Get current scope.
*
* @return The current scope.
* * @see ecs_get_scope
*/
flecs::entity get_scope() const;
/** Same as set_scope but with type.
* * @see ecs_set_scope
*/
template <typename T>
flecs::entity set_scope() const;
/** Set search path.
* @see ecs_set_lookup_path
*/
flecs::entity_t* set_lookup_path(const flecs::entity_t *search_path) const {
return ecs_set_lookup_path(m_world, search_path);
}
/** Lookup entity by name.
*
* @param name Entity name.
* @param search_path When false, only the current scope is searched.
* @result The entity if found, or 0 if not found.
*/
flecs::entity lookup(const char *name, bool search_path = true) const;
/** Set singleton component.
*/
template <typename T, if_t< !is_callable<T>::value > = 0>
void set(const T& value) const {
flecs::set<T>(m_world, _::cpp_type<T>::id(m_world), value);
}
/** Set singleton component.
*/
template <typename T, if_t< !is_callable<T>::value > = 0>
void set(T&& value) const {
flecs::set<T>(m_world, _::cpp_type<T>::id(m_world),
FLECS_FWD(value));
}
/** Set singleton pair.
*/
template <typename First, typename Second, typename P = flecs::pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
void set(const A& value) const {
flecs::set<P>(m_world, _::cpp_type<First>::id(m_world), value);
}
/** Set singleton pair.
*/
template <typename First, typename Second, typename P = flecs::pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
void set(A&& value) const {
flecs::set<P>(m_world, _::cpp_type<First>::id(m_world), FLECS_FWD(value));
}
/** Set singleton pair.
*/
template <typename First, typename Second>
void set(Second second, const First& value) const;
/** Set singleton pair.
*/
template <typename First, typename Second>
void set(Second second, First&& value) const;
/** Set singleton component inside a callback.
*/
template <typename Func, if_t< is_callable<Func>::value > = 0 >
void set(const Func& func) const;
template <typename T, typename ... Args>
void emplace(Args&&... args) const {
flecs::id_t component_id = _::cpp_type<T>::id(m_world);
flecs::emplace<T>(m_world, component_id, component_id,
FLECS_FWD(args)...);
}
/** Get mut singleton component.
*/
template <typename T>
T* get_mut() const;
/** Mark singleton component as modified.
*/
template <typename T>
void modified() const;
/** Get ref singleton component.
*/
template <typename T>
ref<T> get_ref() const;
/** Get singleton component.
*/
template <typename T>
const T* get() const;
/** Get singleton pair.
*/
template <typename First, typename Second, typename P = flecs::pair<First, Second>,
typename A = actual_type_t<P>>
const A* get() const;
/** Get singleton pair.
*/
template <typename First, typename Second>
const First* get(Second second) const;
/** Get singleton component inside a callback.
*/
template <typename Func, if_t< is_callable<Func>::value > = 0 >
void get(const Func& func) const;
/** Test if world has singleton component.
*/
template <typename T>
bool has() const;
/** Test if world has the provided pair.
*
* @tparam First The first element of the pair
* @tparam Second The second element of the pair
*/
template <typename First, typename Second>
bool has() const;
/** Test if world has the provided pair.
*
* @tparam First The first element of the pair
* @param second The second element of the pair.
*/
template <typename First>
bool has(flecs::id_t second) const;
/** Test if world has the provided pair.
*
* @param first The first element of the pair
* @param second The second element of the pair
*/
bool has(flecs::id_t first, flecs::id_t second) const;
/** Add singleton component.
*/
template <typename T>
void add() const;
/** Adds a pair to the singleton component.
*
* @tparam First The first element of the pair
* @tparam Second The second element of the pair
*/
template <typename First, typename Second>
void add() const;
/** Adds a pair to the singleton component.
*
* @tparam First The first element of the pair
* @param second The second element of the pair.
*/
template <typename First>
void add(flecs::entity_t second) const;
/** Adds a pair to the singleton entity.
*
* @param first The first element of the pair
* @param second The second element of the pair
*/
void add(flecs::entity_t first, flecs::entity_t second) const;
/** Remove singleton component.
*/
template <typename T>
void remove() const;
/** Removes the pair singleton component.
*
* @tparam First The first element of the pair
* @tparam Second The second element of the pair
*/
template <typename First, typename Second>
void remove() const;
/** Removes the pair singleton component.
*
* @tparam First The first element of the pair
* @param second The second element of the pair.
*/
template <typename First>
void remove(flecs::entity_t second) const;
/** Removes the pair singleton component.
*
* @param first The first element of the pair
* @param second The second element of the pair
*/
void remove(flecs::entity_t first, flecs::entity_t second) const;
/** Iterate entities in root of world
* Accepts a callback with the following signature:
*
* @code
* void(*)(flecs::entity e);
* @endcode
*/
template <typename Func>
void children(Func&& f) const;
/** Get singleton entity for type.
*/
template <typename T>
flecs::entity singleton() const;
/** Get target for a given pair from a singleton entity.
* This operation returns the target for a given pair. The optional
* index can be used to iterate through targets, in case the entity has
* multiple instances for the same relationship.
*
* @tparam First The first element of the pair.
* @param index The index (0 for the first instance of the relationship).
*/
template<typename First>
flecs::entity target(int32_t index = 0) const;
/** Get target for a given pair from a singleton entity.
* This operation returns the target for a given pair. The optional
* index can be used to iterate through targets, in case the entity has
* multiple instances for the same relationship.
*
* @param first The first element of the pair for which to retrieve the target.
* @param index The index (0 for the first instance of the relationship).
*/
template<typename T>
flecs::entity target(flecs::entity_t first, int32_t index = 0) const;
/** Get target for a given pair from a singleton entity.
* This operation returns the target for a given pair. The optional
* index can be used to iterate through targets, in case the entity has
* multiple instances for the same relationship.
*
* @param first The first element of the pair for which to retrieve the target.
* @param index The index (0 for the first instance of the relationship).
*/
flecs::entity target(flecs::entity_t first, int32_t index = 0) const;
/** Create alias for component.
*
* @tparam T to create an alias for.
* @param alias Alias for the component.
* @return Entity representing the component.
*/
template <typename T>
flecs::entity use(const char *alias = nullptr) const;
/** Create alias for entity.
*
* @param name Name of the entity.
* @param alias Alias for the entity.
*/
flecs::entity use(const char *name, const char *alias = nullptr) const;
/** Create alias for entity.
*
* @param entity Entity for which to create the alias.
* @param alias Alias for the entity.
*/
void use(flecs::entity entity, const char *alias = nullptr) const;
/** Count entities matching a component.
*
* @param component_id The component id.
*/
int count(flecs::id_t component_id) const {
return ecs_count_id(m_world, component_id);
}
/** Count entities matching a pair.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
int count(flecs::entity_t first, flecs::entity_t second) const {
return ecs_count_id(m_world, ecs_pair(first, second));
}
/** Count entities matching a component.
*
* @tparam T The component type.
*/
template <typename T>
int count() const {
return count(_::cpp_type<T>::id(m_world));
}
/** Count entities matching a pair.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
*/
template <typename First>
int count(flecs::entity_t second) const {
return count(_::cpp_type<First>::id(m_world), second);
}
/** Count entities matching a pair.
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
*/
template <typename First, typename Second>
int count() const {
return count(
_::cpp_type<First>::id(m_world),
_::cpp_type<Second>::id(m_world));
}
/** All entities created in function are created with id.
*/
template <typename Func>
void with(id_t with_id, const Func& func) const {
ecs_id_t prev = ecs_set_with(m_world, with_id);
func();
ecs_set_with(m_world, prev);
}
/** All entities created in function are created with type.
*/
template <typename T, typename Func>
void with(const Func& func) const {
with(this->id<T>(), func);
}
/** All entities created in function are created with pair.
*/
template <typename First, typename Second, typename Func>
void with(const Func& func) const {
with(ecs_pair(this->id<First>(), this->id<Second>()), func);
}
/** All entities created in function are created with pair.
*/
template <typename First, typename Func>
void with(id_t second, const Func& func) const {
with(ecs_pair(this->id<First>(), second), func);
}
/** All entities created in function are created with pair.
*/
template <typename Func>
void with(id_t first, id_t second, const Func& func) const {
with(ecs_pair(first, second), func);
}
/** All entities created in function are created in scope. All operations
* called in function (such as lookup) are relative to scope.
*/
template <typename Func>
void scope(id_t parent, const Func& func) const {
ecs_entity_t prev = ecs_set_scope(m_world, parent);
func();
ecs_set_scope(m_world, prev);
}
/** Same as scope(parent, func), but with T as parent.
*/
template <typename T, typename Func>
void scope(const Func& func) const {
flecs::id_t parent = _::cpp_type<T>::id(m_world);
scope(parent, func);
}
/** Use provided scope for operations ran on returned world.
* Operations need to be ran in a single statement.
*/
flecs::scoped_world scope(id_t parent) const;
template <typename T>
flecs::scoped_world scope() const;
flecs::scoped_world scope(const char* name) const;
/** Delete all entities with specified id. */
void delete_with(id_t the_id) const {
ecs_delete_with(m_world, the_id);
}
/** Delete all entities with specified pair. */
void delete_with(entity_t first, entity_t second) const {
delete_with(ecs_pair(first, second));
}
/** Delete all entities with specified component. */
template <typename T>
void delete_with() const {
delete_with(_::cpp_type<T>::id(m_world));
}
/** Delete all entities with specified pair. */
template <typename First, typename Second>
void delete_with() const {
delete_with(_::cpp_type<First>::id(m_world), _::cpp_type<Second>::id(m_world));
}
/** Delete all entities with specified pair. */
template <typename First>
void delete_with(entity_t second) const {
delete_with(_::cpp_type<First>::id(m_world), second);
}
/** Remove all instances of specified id. */
void remove_all(id_t the_id) const {
ecs_remove_all(m_world, the_id);
}
/** Remove all instances of specified pair. */
void remove_all(entity_t first, entity_t second) const {
remove_all(ecs_pair(first, second));
}
/** Remove all instances of specified component. */
template <typename T>
void remove_all() const {
remove_all(_::cpp_type<T>::id(m_world));
}
/** Remove all instances of specified pair. */
template <typename First, typename Second>
void remove_all() const {
remove_all(_::cpp_type<First>::id(m_world), _::cpp_type<Second>::id(m_world));
}
/** Remove all instances of specified pair. */
template <typename First>
void remove_all(entity_t second) const {
remove_all(_::cpp_type<First>::id(m_world), second);
}
/** Defer all operations called in function. If the world is already in
* deferred mode, do nothing.
*/
template <typename Func>
void defer(const Func& func) const {
ecs_defer_begin(m_world);
func();
ecs_defer_end(m_world);
}
/** Suspend deferring operations.
*
* @see ecs_defer_suspend
*/
void defer_suspend() const {
ecs_defer_suspend(m_world);
}
/** Resume deferring operations.
*
* @see ecs_defer_suspend
*/
void defer_resume() const {
ecs_defer_resume(m_world);
}
/** Check if entity id exists in the world.
*
* @see ecs_exists
*/
bool exists(flecs::entity_t e) const {
return ecs_exists(m_world, e);
}
/** Check if entity id exists in the world.
*
* @see ecs_is_alive
*/
bool is_alive(flecs::entity_t e) const {
return ecs_is_alive(m_world, e);
}
/** Check if entity id is valid.
* Invalid entities cannot be used with API functions.
*
* @see ecs_is_valid
*/
bool is_valid(flecs::entity_t e) const {
return ecs_is_valid(m_world, e);
}
/** Get alive entity for id.
* Returns the entity with the current generation.
*
* @see ecs_get_alive
*/
flecs::entity get_alive(flecs::entity_t e) const;
/* Prevent clashing with Unreal define. Unreal applications will have to use
* ecs_ensure. */
#ifndef ensure
/** Ensures that entity with provided generation is alive.
* This operation will fail if an entity exists with the same id and a
* different, non-zero generation.
*
* @see ecs_ensure
*/
flecs::entity ensure(flecs::entity_t e) const;
#endif
/* Run callback after completing frame */
void run_post_frame(ecs_fini_action_t action, void *ctx) const {
ecs_run_post_frame(m_world, action, ctx);
}
/** Get the world info.
* @see ecs_get_world_info
*/
const flecs::world_info_t* get_info() const{
return ecs_get_world_info(m_world);
}
/** Get delta_time */
ecs_ftime_t delta_time() const {
return get_info()->delta_time;
}
/**
* @file addons/cpp/mixins/id/mixin.inl
* @brief Id world mixin.
*/
/** Get id from a type.
*
* @memberof flecs::world
*/
template <typename T>
flecs::id id() const;
/** Id factory.
*
* @memberof flecs::world
*/
template <typename ... Args>
flecs::id id(Args&&... args) const;
/** Get pair id from relationship, object.
*
* @memberof flecs::world
*/
template <typename First, typename Second>
flecs::id pair() const;
/** Get pair id from relationship, object.
*
* @memberof flecs::world
*/
template <typename First>
flecs::id pair(entity_t o) const;
/** Get pair id from relationship, object.
*
* @memberof flecs::world
*/
flecs::id pair(entity_t r, entity_t o) const;
/**
* @file addons/cpp/mixins/component/mixin.inl
* @brief Component mixin.
*/
/** Find or register component.
*
* @ingroup cpp_components
* @memberof flecs::world
*/
template <typename T, typename... Args>
flecs::component<T> component(Args &&... args) const;
/** Find or register untyped component.
* Method available on flecs::world class.
*
* @ingroup cpp_components
* @memberof flecs::world
*/
template <typename... Args>
flecs::untyped_component component(Args &&... args) const;
/**
* @file addons/cpp/mixins/entity/mixin.inl
* @brief Entity world mixin.
*/
/** Create an entity.
*
* @memberof flecs::world
* @ingroup cpp_entities
*/
template <typename... Args>
flecs::entity entity(Args &&... args) const;
/** Convert enum constant to entity.
*
* @memberof flecs::world
* @ingroup cpp_entities
*/
template <typename E, if_t< is_enum<E>::value > = 0>
flecs::id id(E value) const;
/** Convert enum constant to entity.
*
* @memberof flecs::world
* @ingroup cpp_entities
*/
template <typename E, if_t< is_enum<E>::value > = 0>
flecs::entity entity(E value) const;
/** Create a prefab.
*
* @memberof flecs::world
* @ingroup cpp_entities
*/
template <typename... Args>
flecs::entity prefab(Args &&... args) const;
/** Create an entity that's associated with a type.
*
* @memberof flecs::world
* @ingroup cpp_entities
*/
template <typename T>
flecs::entity entity(const char *name = nullptr) const;
/** Create a prefab that's associated with a type.
*
* @memberof flecs::world
* @ingroup cpp_entities
*/
template <typename T>
flecs::entity prefab(const char *name = nullptr) const;
/**
* @file addons/cpp/mixins/event/mixin.inl
* @brief Event world mixin.
*/
/**
* @defgroup cpp_addons_event Events
* @ingroup cpp_addons
* API for emitting events.
*
* @{
*/
/** Create a new event.
*
* @memberof flecs::world
*
* @param evt The event id.
* @return Event builder.
*/
flecs::event_builder event(flecs::entity_t evt) const;
/** Create a new event.
*
* @memberof flecs::world
*
* @tparam E The event type.
* @return Event builder.
*/
template <typename E>
flecs::event_builder_typed<E> event() const;
/** @} */
/**
* @file addons/cpp/mixins/term/mixin.inl
* @brief Term world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_core_filters
*
* @{
*/
/** Create a term.
*
*/
template<typename... Args>
flecs::term term(Args &&... args) const;
/** Create a term for a (component) type.
*/
template<typename T>
flecs::term term() const;
/** Create a term for a pair.
*/
template<typename First, typename Second>
flecs::term term() const;
/** @} */
/**
* @file addons/cpp/mixins/filter/mixin.inl
* @brief Filter world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_core_filters
*
* @{
*/
/** Create a filter.
*
* @see ecs_filter_init
*/
template <typename... Comps, typename... Args>
flecs::filter<Comps...> filter(Args &&... args) const;
/** Create a filter builder.
*
* @see ecs_filter_init
*/
template <typename... Comps, typename... Args>
flecs::filter_builder<Comps...> filter_builder(Args &&... args) const;
/** Iterate over all entities with components in argument list of function.
* The function parameter must match the following signature:
*
* @code
* void(*)(T&, U&, ...)
* @endcode
*
* or:
*
* @code
* void(*)(flecs::entity, T&, U&, ...)
* @endcode
*
*/
template <typename Func>
void each(Func&& func) const;
/** Iterate over all entities with provided component.
* The function parameter must match the following signature:
*
* @code
* void(*)(T&)
* @endcode
*
* or:
*
* @code
* void(*)(flecs::entity, T&)
* @endcode
*
*/
template <typename T, typename Func>
void each(Func&& func) const;
/** Iterate over all entities with provided (component) id. */
template <typename Func>
void each(flecs::id_t term_id, Func&& func) const;
/** @} */
/**
* @file addons/cpp/mixins/observer/mixin.inl
* @brief Observer world mixin.
*/
/** Observer builder.
*
* @memberof flecs::world
* @ingroup cpp_observers
*
* @{
*/
/** Upcast entity to an observer.
* The provided entity must be an observer.
*
* @param e The entity.
* @return An observer object.
*/
flecs::observer observer(flecs::entity e) const;
/** Create a new observer.
*
* @tparam Components The components to match on.
* @tparam Args Arguments passed to the constructor of flecs::observer_builder.
* @return Observer builder.
*/
template <typename... Components, typename... Args>
flecs::observer_builder<Components...> observer(Args &&... args) const;
/** @} */
/**
* @file addons/cpp/mixins/query/mixin.inl
* @brief Query world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_core_queries
*
* @{
*/
/** Create a query.
* @see ecs_query_init
*/
template <typename... Comps, typename... Args>
flecs::query<Comps...> query(Args &&... args) const;
/** Create a subquery.
* @see ecs_query_init
*/
template <typename... Comps, typename... Args>
flecs::query<Comps...> query(flecs::query_base& parent, Args &&... args) const;
/** Create a query builder.
* @see ecs_query_init
*/
template <typename... Comps, typename... Args>
flecs::query_builder<Comps...> query_builder(Args &&... args) const;
/** @} */
/**
* @file addons/cpp/mixins/enum/mixin.inl
* @brief Enum world mixin.
*/
/** Convert enum constant to entity.
*
* @memberof flecs::world
* @ingroup cpp_entities
*/
template <typename E, if_t< is_enum<E>::value > = 0>
flecs::entity to_entity(E constant) const;
# ifdef FLECS_MODULE
/**
* @file addons/cpp/mixins/module/mixin.inl
* @brief Module world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_addons_modules
*
* @{
*/
/** Define a module.
* This operation is not mandatory, but can be called inside the module ctor to
* obtain the entity associated with the module, or override the module name.
*
* @tparam Module module class.
* @return Module entity.
*/
template <typename Module>
flecs::entity module(const char *name = nullptr) const;
/** Import a module.
*
* @tparam Module module class.
* @return Module entity.
*/
template <typename Module>
flecs::entity import();
/** @} */
# endif
# ifdef FLECS_PIPELINE
/**
* @file addons/cpp/mixins/pipeline/mixin.inl
* @brief Pipeline world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_pipelines
*
* @{
*/
/** Create a new pipeline.
*
* @return A pipeline builder.
*/
flecs::pipeline_builder<> pipeline() const;
/** Create a new pipeline.
*
* @tparam Pipeline Type associated with pipeline.
* @return A pipeline builder.
*/
template <typename Pipeline, if_not_t< is_enum<Pipeline>::value > = 0>
flecs::pipeline_builder<> pipeline() const;
/** Set pipeline.
* @see ecs_set_pipeline
*/
void set_pipeline(const flecs::entity pip) const;
/** Set pipeline.
* @see ecs_set_pipeline
*/
template <typename Pipeline>
void set_pipeline() const;
/** Get pipeline.
* @see ecs_get_pipeline
*/
flecs::entity get_pipeline() const;
/** Progress world one tick.
* @see ecs_progress
*/
bool progress(ecs_ftime_t delta_time = 0.0) const;
/** Run pipeline.
* @see ecs_run_pipeline
*/
void run_pipeline(const flecs::entity_t pip, ecs_ftime_t delta_time = 0.0) const;
/** Run pipeline.
* @tparam Pipeline Type associated with pipeline.
* @see ecs_run_pipeline
*/
template <typename Pipeline, if_not_t< is_enum<Pipeline>::value > = 0>
void run_pipeline(ecs_ftime_t delta_time = 0.0) const;
/** Set timescale.
* @see ecs_set_time_scale
*/
void set_time_scale(ecs_ftime_t mul) const;
/** Set target FPS.
* @see ecs_set_target_fps
*/
void set_target_fps(ecs_ftime_t target_fps) const;
/** Reset simulation clock.
* @see ecs_reset_clock
*/
void reset_clock() const;
/** Set number of threads.
* @see ecs_set_threads
*/
void set_threads(int32_t threads) const;
/** Set number of threads.
* @see ecs_get_stage_count
*/
int32_t get_threads() const;
/** Set number of task threads.
* @see ecs_set_task_threads
*/
void set_task_threads(int32_t task_threads) const;
/** Returns true if task thread use has been requested.
* @see ecs_using_task_threads
*/
bool using_task_threads() const;
/** @} */
# endif
# ifdef FLECS_SNAPSHOT
/**
* @file addons/cpp/mixins/snapshot/mixin.inl
* @brief Snapshot world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_addons_snapshots
*
* @{
*/
/** Create a snapshot.
*/
template <typename... Args>
flecs::snapshot snapshot(Args &&... args) const;
/** @} */
# endif
# ifdef FLECS_SYSTEM
/**
* @file addons/cpp/mixins/system/mixin.inl
* @brief System module world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_addons_systems
*
* @{
*/
/** Upcast entity to a system.
* The provided entity must be a system.
*
* @param e The entity.
* @return A system object.
*/
flecs::system system(flecs::entity e) const;
/** Create a new system.
*
* @tparam Components The components to match on.
* @tparam Args Arguments passed to the constructor of flecs::system_builder.
* @return System builder.
*/
template <typename... Components, typename... Args>
flecs::system_builder<Components...> system(Args &&... args) const;
/** @} */
# endif
# ifdef FLECS_TIMER
/**
* @file addons/cpp/mixins/timer/mixin.inl
* @brief Timer module mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_addons_timer
*/
/** Find or register a singleton timer. */
template <typename T>
flecs::timer timer() const;
/** Find or register a timer. */
template <typename... Args>
flecs::timer timer(Args &&... args) const;
/** Enable randomization of initial time values for timers.
* @see ecs_randomize_timers
*/
void randomize_timers() const;
# endif
# ifdef FLECS_RULES
/**
* @file addons/cpp/mixins/rule/mixin.inl
* @brief Rule world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_addons_rules
*
* @{
*/
/** Create a rule.
* @see ecs_rule_init
*/
template <typename... Comps, typename... Args>
flecs::rule<Comps...> rule(Args &&... args) const;
/** Create a subrule.
* @see ecs_rule_init
*/
template <typename... Comps, typename... Args>
flecs::rule<Comps...> rule(flecs::rule_base& parent, Args &&... args) const;
/** Create a rule builder.
* @see ecs_rule_init
*/
template <typename... Comps, typename... Args>
flecs::rule_builder<Comps...> rule_builder(Args &&... args) const;
/** @} */
# endif
# ifdef FLECS_PLECS
/**
* @file addons/cpp/mixins/plecs/mixin.inl
* @brief Plecs world mixin.
*/
/**
* @defgroup cpp_addons_plecs Plecs
* @ingroup cpp_addons
* Data definition format for loading entity data.
*
* @{
*/
/** Load plecs string.
* @see ecs_plecs_from_str
*/
int plecs_from_str(const char *name, const char *str) const {
return ecs_plecs_from_str(m_world, name, str);
}
/** Load plecs from file.
* @see ecs_plecs_from_file
*/
int plecs_from_file(const char *filename) const {
return ecs_plecs_from_file(m_world, filename);
}
/** @} */
# endif
# ifdef FLECS_META
/**
* @file addons/cpp/mixins/meta/world.inl
* @brief Meta world mixin.
*/
/**
* @memberof flecs::world
* @ingroup cpp_addons_meta
*
* @{
*/
/** Convert value to string */
flecs::string to_expr(flecs::entity_t tid, const void* value) {
char *expr = ecs_ptr_to_expr(m_world, tid, value);
return flecs::string(expr);
}
/** Convert value to string */
template <typename T>
flecs::string to_expr(const T* value) {
flecs::entity_t tid = _::cpp_type<T>::id(m_world);
return to_expr(tid, value);
}
/** Return meta cursor to value */
flecs::cursor cursor(flecs::entity_t tid, void *ptr) {
return flecs::cursor(m_world, tid, ptr);
}
/** Return meta cursor to value */
template <typename T>
flecs::cursor cursor(void *ptr) {
flecs::entity_t tid = _::cpp_type<T>::id(m_world);
return cursor(tid, ptr);
}
/** Create primitive type */
flecs::entity primitive(flecs::meta::primitive_kind_t kind);
/** Create array type. */
flecs::entity array(flecs::entity_t elem_id, int32_t array_count);
/** Create array type. */
template <typename T>
flecs::entity array(int32_t array_count);
/** Create vector type. */
flecs::entity vector(flecs::entity_t elem_id);
/** Create vector type. */
template <typename T>
flecs::entity vector();
/** @} */
# endif
# ifdef FLECS_JSON
/**
* @file addons/cpp/mixins/json/world.inl
* @brief JSON world mixin.
*/
/** Serialize untyped value to JSON.
*
* @memberof flecs::world
* @ingroup cpp_addons_json
*/
flecs::string to_json(flecs::entity_t tid, const void* value) {
char *json = ecs_ptr_to_json(m_world, tid, value);
return flecs::string(json);
}
/** Serialize value to JSON.
*
* @memberof flecs::world
* @ingroup cpp_addons_json
*/
template <typename T>
flecs::string to_json(const T* value) {
flecs::entity_t tid = _::cpp_type<T>::id(m_world);
return to_json(tid, value);
}
/** Serialize world to JSON.
*
* @memberof flecs::world
* @ingroup cpp_addons_json
*/
flecs::string to_json() {
return flecs::string( ecs_world_to_json(m_world, nullptr) );
}
/** Deserialize value from JSON.
*
* @memberof flecs::world
* @ingroup cpp_addons_json
*/
const char* from_json(flecs::entity_t tid, void* value, const char *json, flecs::from_json_desc_t *desc = nullptr) {
return ecs_ptr_from_json(m_world, tid, value, json, desc);
}
/** Deserialize value from JSON.
*
* @memberof flecs::world
* @ingroup cpp_addons_json
*/
template <typename T>
const char* from_json(T* value, const char *json, flecs::from_json_desc_t *desc = nullptr) {
return ecs_ptr_from_json(m_world, _::cpp_type<T>::id(m_world),
value, json, desc);
}
/** Deserialize JSON into world.
*
* @memberof flecs::world
* @ingroup cpp_addons_json
*/
const char* from_json(const char *json, flecs::from_json_desc_t *desc = nullptr) {
return ecs_world_from_json(m_world, json, desc);
}
# endif
# ifdef FLECS_APP
/**
* @file addons/cpp/mixins/app/mixin.inl
* @brief App world addon mixin.
*/
/**
* @ingroup cpp_addons_app
* @memberof flecs::world
*
* @{
*/
/** Return app builder.
* The app builder is a convenience wrapper around a loop that runs
* world::progress. An app allows for writing platform agnostic code,
* as it provides hooks to modules for overtaking the main loop which is
* required for frameworks like emscripten.
*/
flecs::app_builder app() {
m_owned = false; // App takes ownership of world
return flecs::app_builder(m_world);
}
/** @} */
# endif
# ifdef FLECS_METRICS
/** Create metric.
*
* @ingroup cpp_addons_metrics
* @memberof flecs::world
*/
template <typename... Args>
flecs::metric_builder metric(Args &&... args) const;
# endif
# ifdef FLECS_ALERTS
/** Create alert.
*
* @ingroup cpp_addons_alerts
* @memberof flecs::world
*/
template <typename... Comps, typename... Args>
flecs::alert_builder<Comps...> alert(Args &&... args) const;
# endif
public:
void init_builtin_components();
world_t *m_world;
bool m_owned;
};
/** Scoped world.
* Utility class used by the world::scope method to create entities in a scope.
*/
struct scoped_world : world {
scoped_world(
flecs::world_t *w,
flecs::entity_t s) : world(nullptr)
{
m_prev_scope = ecs_set_scope(w, s);
m_world = w;
m_owned = false;
}
~scoped_world() {
ecs_set_scope(m_world, m_prev_scope);
}
scoped_world(const scoped_world& obj) : world(nullptr) {
m_prev_scope = obj.m_prev_scope;
m_world = obj.m_world;
m_owned = obj.m_owned;
}
flecs::entity_t m_prev_scope;
};
/** @} */
} // namespace flecs
/**
* @file addons/cpp/iter.hpp
* @brief Wrapper classes for ecs_iter_t and component arrays.
*/
#pragma once
/**
* @defgroup cpp_iterator Iterators
* @ingroup cpp_core
* Iterator operations.
*
* @{
*/
namespace flecs
{
/** Unsafe wrapper class around a column.
* This class can be used when a system does not know the type of a column at
* compile time.
*
* @ingroup cpp_iterator
*/
struct untyped_column {
untyped_column(void* array, size_t size, size_t count, bool is_shared = false)
: m_array(array)
, m_size(size)
, m_count(count)
, m_is_shared(is_shared) {}
/** Return element in component array.
* This operator may only be used if the column is not shared.
*
* @param index Index of element.
* @return Reference to element.
*/
void* operator[](size_t index) const {
ecs_assert(index < m_count, ECS_COLUMN_INDEX_OUT_OF_RANGE, NULL);
ecs_assert(!m_is_shared, ECS_INVALID_PARAMETER, NULL);
return ECS_OFFSET(m_array, m_size * index);
}
protected:
void* m_array;
size_t m_size;
size_t m_count;
bool m_is_shared;
};
/** Wrapper class around a column.
*
* @tparam T component type of the column.
*
* @ingroup cpp_iterator
*/
template <typename T>
struct column {
static_assert(std::is_empty<T>::value == false,
"invalid type for column, cannot iterate empty type");
/** Create column from component array.
*
* @param array Pointer to the component array.
* @param count Number of elements in component array.
* @param is_shared Is the component shared or not.
*/
column(T* array, size_t count, bool is_shared = false)
: m_array(array)
, m_count(count)
, m_is_shared(is_shared) {}
/** Create column from iterator.
*
* @param iter Iterator object.
* @param column Index of the signature of the query being iterated over.
*/
column(iter &iter, int column);
/** Return element in component array.
* This operator may only be used if the column is not shared.
*
* @param index Index of element.
* @return Reference to element.
*/
T& operator[](size_t index) const {
ecs_assert(index < m_count, ECS_COLUMN_INDEX_OUT_OF_RANGE, NULL);
ecs_assert(!index || !m_is_shared, ECS_INVALID_PARAMETER, NULL);
ecs_assert(m_array != nullptr, ECS_COLUMN_INDEX_OUT_OF_RANGE, NULL);
return m_array[index];
}
/** Return first element of component array.
* This operator is typically used when the column is shared.
*
* @return Reference to the first element.
*/
T& operator*() const {
ecs_assert(m_array != nullptr, ECS_COLUMN_INDEX_OUT_OF_RANGE, NULL);
return *m_array;
}
/** Return first element of component array.
* This operator is typically used when the column is shared.
*
* @return Pointer to the first element.
*/
T* operator->() const {
ecs_assert(m_array != nullptr, ECS_COLUMN_INDEX_OUT_OF_RANGE, NULL);
return m_array;
}
protected:
T* m_array;
size_t m_count;
bool m_is_shared;
};
////////////////////////////////////////////////////////////////////////////////
namespace _ {
////////////////////////////////////////////////////////////////////////////////
/** Iterate over an integer range (used to iterate over entity range).
*
* @tparam T of the iterator
*/
template <typename T>
struct range_iterator
{
explicit range_iterator(T value)
: m_value(value){}
bool operator!=(range_iterator const& other) const
{
return m_value != other.m_value;
}
T const& operator*() const
{
return m_value;
}
range_iterator& operator++()
{
++m_value;
return *this;
}
private:
T m_value;
};
} // namespace _
} // namespace flecs
namespace flecs
{
////////////////////////////////////////////////////////////////////////////////
/** Class for iterating over query results.
*
* @ingroup cpp_iterator
*/
struct iter {
private:
using row_iterator = _::range_iterator<size_t>;
public:
/** Construct iterator from C iterator object.
* This operation is typically not invoked directly by the user.
*
* @param it Pointer to C iterator.
*/
iter(ecs_iter_t *it) : m_iter(it) {
m_begin = 0;
m_end = static_cast<std::size_t>(it->count);
}
row_iterator begin() const {
return row_iterator(m_begin);
}
row_iterator end() const {
return row_iterator(m_end);
}
flecs::entity system() const;
flecs::entity event() const;
flecs::id event_id() const;
flecs::world world() const;
const flecs::iter_t* c_ptr() const {
return m_iter;
}
size_t count() const {
return static_cast<size_t>(m_iter->count);
}
ecs_ftime_t delta_time() const {
return m_iter->delta_time;
}
ecs_ftime_t delta_system_time() const {
return m_iter->delta_system_time;
}
flecs::type type() const;
flecs::table table() const;
flecs::table_range range() const;
/** Access ctx.
* ctx contains the context pointer assigned to a system.
*/
void* ctx() {
return m_iter->ctx;
}
/** Access ctx.
* ctx contains the context pointer assigned to a system.
*/
template <typename T>
T* ctx() {
return static_cast<T*>(m_iter->ctx);
}
/** Access param.
* param contains the pointer passed to the param argument of system::run
*/
void* param() {
return m_iter->param;
}
/** Access param.
* param contains the pointer passed to the param argument of system::run
*/
template <typename T>
T* param() {
/* TODO: type check */
return static_cast<T*>(m_iter->param);
}
/** Obtain mutable handle to entity being iterated over.
*
* @param row Row being iterated over.
*/
flecs::entity entity(size_t row) const;
/** Returns whether field is matched on self.
*
* @param index The field index.
*/
bool is_self(int32_t index) const {
return ecs_field_is_self(m_iter, index);
}
/** Returns whether field is set.
*
* @param index The field index.
*/
bool is_set(int32_t index) const {
return ecs_field_is_set(m_iter, index);
}
/** Returns whether field is readonly.
*
* @param index The field index.
*/
bool is_readonly(int32_t index) const {
return ecs_field_is_readonly(m_iter, index);
}
/** Number of fields in iterator.
*/
int32_t field_count() const {
return m_iter->field_count;
}
/** Size of field data type.
*
* @param index The field id.
*/
size_t size(int32_t index) const {
return ecs_field_size(m_iter, index);
}
/** Obtain field source (0 if This).
*
* @param index The field index.
*/
flecs::entity src(int32_t index) const;
/** Obtain id matched for field.
*
* @param index The field index.
*/
flecs::id id(int32_t index) const;
/** Obtain pair id matched for field.
* This operation will fail if the id is not a pair.
*
* @param index The field index.
*/
flecs::id pair(int32_t index) const;
/** Obtain column index for field.
*
* @param index The field index.
*/
int32_t column_index(int32_t index) const {
return ecs_field_column_index(m_iter, index);
}
/** Convert current iterator result to string.
*/
flecs::string str() const {
char *s = ecs_iter_str(m_iter);
return flecs::string(s);
}
/** Get readonly access to field data.
* If the specified field index does not match with the provided type, the
* function will assert.
*
* @tparam T Type of the field.
* @param index The field index.
* @return The field data.
*/
template <typename T, typename A = actual_type_t<T>,
typename std::enable_if<std::is_const<T>::value, void>::type* = nullptr>
flecs::column<A> field(int32_t index) const {
return get_field<A>(index);
}
/** Get read/write access to field data.
* If the matched id for the specified field does not match with the provided
* type or if the field is readonly, the function will assert.
*
* @tparam T Type of the field.
* @param index The field index.
* @return The field data.
*/
template <typename T, typename A = actual_type_t<T>,
typename std::enable_if<
std::is_const<T>::value == false, void>::type* = nullptr>
flecs::column<A> field(int32_t index) const {
ecs_assert(!ecs_field_is_readonly(m_iter, index),
ECS_ACCESS_VIOLATION, NULL);
return get_field<A>(index);
}
/** Get unchecked access to field data.
* Unchecked access is required when a system does not know the type of a
* field at compile time.
*
* @param index The field index.
*/
flecs::untyped_column field(int32_t index) const {
return get_unchecked_field(index);
}
/** Get readonly access to entity ids.
*
* @return The entity ids.
*/
flecs::column<const flecs::entity_t> entities() const {
return flecs::column<const flecs::entity_t>(m_iter->entities, static_cast<size_t>(m_iter->count), false);
}
/** Obtain the total number of tables the iterator will iterate over. */
int32_t table_count() const {
return m_iter->table_count;
}
/** Check if the current table has changed since the last iteration.
* Can only be used when iterating queries and/or systems. */
bool changed() {
return ecs_query_changed(nullptr, m_iter);
}
/** Skip current table.
* This indicates to the query that the data in the current table is not
* modified. By default, iterating a table with a query will mark the
* iterated components as dirty if they are annotated with InOut or Out.
*
* When this operation is invoked, the components of the current table will
* not be marked dirty. */
void skip() {
ecs_query_skip(m_iter);
}
/* Return group id for current table (grouped queries only) */
uint64_t group_id() const {
return m_iter->group_id;
}
#ifdef FLECS_RULES
/** Get value of variable by id.
* Get value of a query variable for current result.
*/
flecs::entity get_var(int var_id) const;
/** Get value of variable by name.
* Get value of a query variable for current result.
*/
flecs::entity get_var(const char *name) const;
#endif
private:
/* Get field, check if correct type is used */
template <typename T, typename A = actual_type_t<T>>
flecs::column<T> get_field(int32_t index) const {
#ifndef FLECS_NDEBUG
ecs_entity_t term_id = ecs_field_id(m_iter, index);
ecs_assert(ECS_HAS_ID_FLAG(term_id, PAIR) ||
term_id == _::cpp_type<T>::id(m_iter->world),
ECS_COLUMN_TYPE_MISMATCH, NULL);
#endif
size_t count;
bool is_shared = !ecs_field_is_self(m_iter, index);
/* If a shared column is retrieved with 'column', there will only be a
* single value. Ensure that the application does not accidentally read
* out of bounds. */
if (is_shared) {
count = 1;
} else {
/* If column is owned, there will be as many values as there are
* entities. */
count = static_cast<size_t>(m_iter->count);
}
return flecs::column<A>(
static_cast<T*>(ecs_field_w_size(m_iter, sizeof(A), index)),
count, is_shared);
}
flecs::untyped_column get_unchecked_field(int32_t index) const {
size_t count;
size_t size = ecs_field_size(m_iter, index);
bool is_shared = !ecs_field_is_self(m_iter, index);
/* If a shared column is retrieved with 'column', there will only be a
* single value. Ensure that the application does not accidentally read
* out of bounds. */
if (is_shared) {
count = 1;
} else {
/* If column is owned, there will be as many values as there are
* entities. */
count = static_cast<size_t>(m_iter->count);
}
return flecs::untyped_column(
ecs_field_w_size(m_iter, 0, index), size, count, is_shared);
}
flecs::iter_t *m_iter;
std::size_t m_begin;
std::size_t m_end;
};
} // namespace flecs
/** @} */
/**
* @file addons/cpp/entity.hpp
* @brief Entity class.
*
* This class provides read/write access to entities.
*/
#pragma once
/**
* @file addons/cpp/entity_view.hpp
* @brief Entity class with only readonly operations.
*
* This class provides readonly access to entities. Using this class to store
* entities in components ensures valid handles, as this class will always store
* the actual world vs. a stage. The constructors of this class will never
* create a new entity.
*
* To obtain a mutable handle to the entity, use the "mut" function.
*/
#pragma once
/**
* @ingroup cpp_entities
* @{
*/
namespace flecs
{
/** Entity view.
* Class with read operations for entities. Base for flecs::entity.
*
* @ingroup cpp_entities
*/
struct entity_view : public id {
entity_view() : flecs::id() { }
/** Wrap an existing entity id.
*
* @param world The world in which the entity is created.
* @param id The entity id.
*/
explicit entity_view(flecs::world_t *world, flecs::id_t id)
: flecs::id(world
? const_cast<flecs::world_t*>(ecs_get_world(world))
: nullptr
, id ) { }
/** Implicit conversion from flecs::entity_t to flecs::entity_view. */
entity_view(entity_t id)
: flecs::id( nullptr, id ) { }
/** Get entity id.
* @return The integer entity id.
*/
entity_t id() const {
return m_id;
}
/** Check if entity is valid.
*
* @return True if the entity is alive, false otherwise.
*/
bool is_valid() const {
return m_world && ecs_is_valid(m_world, m_id);
}
explicit operator bool() const {
return is_valid();
}
/** Check if entity is alive.
*
* @return True if the entity is alive, false otherwise.
*/
bool is_alive() const {
return m_world && ecs_is_alive(m_world, m_id);
}
/** Return the entity name.
*
* @return The entity name.
*/
flecs::string_view name() const {
return flecs::string_view(ecs_get_name(m_world, m_id));
}
/** Return the entity symbol.
*
* @return The entity symbol.
*/
flecs::string_view symbol() const {
return flecs::string_view(ecs_get_symbol(m_world, m_id));
}
/** Return the entity path.
*
* @return The hierarchical entity path.
*/
flecs::string path(const char *sep = "::", const char *init_sep = "::") const {
return path_from(0, sep, init_sep);
}
/** Return the entity path relative to a parent.
*
* @return The relative hierarchical entity path.
*/
flecs::string path_from(flecs::entity_t parent, const char *sep = "::", const char *init_sep = "::") const {
char *path = ecs_get_path_w_sep(m_world, parent, m_id, sep, init_sep);
return flecs::string(path);
}
/** Return the entity path relative to a parent.
*
* @return The relative hierarchical entity path.
*/
template <typename Parent>
flecs::string path_from(const char *sep = "::", const char *init_sep = "::") const {
return path_from(_::cpp_type<Parent>::id(m_world), sep, init_sep);
}
bool enabled() const {
return !ecs_has_id(m_world, m_id, flecs::Disabled);
}
/** Get the entity's type.
*
* @return The entity's type.
*/
flecs::type type() const;
/** Get the entity's table.
*
* @return Returns the entity's table.
*/
flecs::table table() const;
/** Get table range for the entity.
* Returns a range with the entity's row as offset and count set to 1. If
* the entity is not stored in a table, the function returns a range with
* count 0.
*
* @return Returns the entity's table range.
*/
flecs::table_range range() const;
/** Iterate (component) ids of an entity.
* The function parameter must match the following signature:
*
* @code
* void(*)(flecs::id id)
* @endcode
*
* @param func The function invoked for each id.
*/
template <typename Func>
void each(const Func& func) const;
/** Iterate matching pair ids of an entity.
* The function parameter must match the following signature:
*
* @code
* void(*)(flecs::id id)
* @endcode
*
* @param func The function invoked for each id.
*/
template <typename Func>
void each(flecs::id_t first, flecs::id_t second, const Func& func) const;
/** Iterate targets for a given relationship.
* The function parameter must match the following signature:
*
* @code
* void(*)(flecs::entity target)
* @endcode
*
* @param rel The relationship for which to iterate the targets.
* @param func The function invoked for each target.
*/
template <typename Func>
void each(const flecs::entity_view& rel, const Func& func) const;
/** Iterate targets for a given relationship.
* The function parameter must match the following signature:
*
* @code
* void(*)(flecs::entity target)
* @endcode
*
* @tparam First The relationship for which to iterate the targets.
* @param func The function invoked for each target.
*/
template <typename First, typename Func>
void each(const Func& func) const {
return each(_::cpp_type<First>::id(m_world), func);
}
/** Iterate children for entity.
* The function parameter must match the following signature:
*
* @code
* void(*)(flecs::entity target)
* @endcode
*
* @param rel The relationship to follow.
* @param func The function invoked for each child.
*/
template <typename Func>
void children(flecs::entity_t rel, Func&& func) const {
/* When the entity is a wildcard, this would attempt to query for all
* entities with (ChildOf, *) or (ChildOf, _) instead of querying for
* the children of the wildcard entity. */
if (m_id == flecs::Wildcard || m_id == flecs::Any) {
/* This is correct, wildcard entities don't have children */
return;
}
flecs::world world(m_world);
ecs_term_t terms[2];
ecs_filter_t f = ECS_FILTER_INIT;
f.terms = terms;
f.term_count = 2;
ecs_filter_desc_t desc = {};
desc.terms[0].first.id = rel;
desc.terms[0].second.id = m_id;
desc.terms[0].second.flags = EcsIsEntity;
desc.terms[1].id = flecs::Prefab;
desc.terms[1].oper = EcsOptional;
desc.storage = &f;
if (ecs_filter_init(m_world, &desc) != nullptr) {
ecs_iter_t it = ecs_filter_iter(m_world, &f);
while (ecs_filter_next(&it)) {
_::each_delegate<Func>(FLECS_MOV(func)).invoke(&it);
}
ecs_filter_fini(&f);
}
}
/** Iterate children for entity.
* The function parameter must match the following signature:
*
* @code
* void(*)(flecs::entity target)
* @endcode
*
* @tparam Rel The relationship to follow.
* @param func The function invoked for each child.
*/
template <typename Rel, typename Func>
void children(Func&& func) const {
children(_::cpp_type<Rel>::id(m_world), FLECS_MOV(func));
}
/** Iterate children for entity.
* The function parameter must match the following signature:
*
* @code
* void(*)(flecs::entity target)
* @endcode
*
* This operation follows the ChildOf relationship.
*
* @param func The function invoked for each child.
*/
template <typename Func>
void children(Func&& func) const {
children(flecs::ChildOf, FLECS_MOV(func));
}
/** Get component value.
*
* @tparam T The component to get.
* @return Pointer to the component value, nullptr if the entity does not
* have the component.
*/
template <typename T, if_t< is_actual<T>::value > = 0>
const T* get() const {
auto comp_id = _::cpp_type<T>::id(m_world);
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
return static_cast<const T*>(ecs_get_id(m_world, m_id, comp_id));
}
/** Get component value.
* Overload for when T is not the same as the actual type, which happens
* when using pair types.
*
* @tparam T The component to get.
* @return Pointer to the component value, nullptr if the entity does not
* have the component.
*/
template <typename T, typename A = actual_type_t<T>,
if_t< flecs::is_pair<T>::value > = 0>
const A* get() const {
auto comp_id = _::cpp_type<T>::id(m_world);
ecs_assert(_::cpp_type<A>::size() != 0, ECS_INVALID_PARAMETER, NULL);
return static_cast<const A*>(ecs_get_id(m_world, m_id, comp_id));
}
/** Get a pair.
* This operation gets the value for a pair from the entity.
*
* @tparam First The first element of the pair.
* @tparam Second the second element of a pair.
*/
template <typename First, typename Second, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value > = 0>
const A* get() const {
return this->get<P>();
}
/** Get a pair.
* This operation gets the value for a pair from the entity.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
*/
template<typename First, typename Second, if_not_t< is_enum<Second>::value> = 0>
const First* get(Second second) const {
auto comp_id = _::cpp_type<First>::id(m_world);
ecs_assert(_::cpp_type<First>::size() != 0, ECS_INVALID_PARAMETER, NULL);
return static_cast<const First*>(
ecs_get_id(m_world, m_id, ecs_pair(comp_id, second)));
}
/** Get a pair.
* This operation gets the value for a pair from the entity.
*
* @tparam First The first element of the pair.
* @param constant the enum constant.
*/
template<typename First, typename Second, if_t<is_enum<Second>::value> = 0>
const First* get(Second constant) const {
const auto& et = enum_type<Second>(this->m_world);
flecs::entity_t target = et.entity(constant);
return get<First>(target);
}
/** Get component value (untyped).
*
* @param comp The component to get.
* @return Pointer to the component value, nullptr if the entity does not
* have the component.
*/
const void* get(flecs::id_t comp) const {
return ecs_get_id(m_world, m_id, comp);
}
/** Get a pair (untyped).
* This operation gets the value for a pair from the entity. If neither the
* first nor the second part of the pair are components, the operation
* will fail.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
const void* get(flecs::entity_t first, flecs::entity_t second) const {
return ecs_get_id(m_world, m_id, ecs_pair(first, second));
}
/** Get 1..N components.
* This operation accepts a callback with as arguments the components to
* retrieve. The callback will only be invoked when the entity has all
* the components.
*
* This operation is faster than individually calling get for each component
* as it only obtains entity metadata once.
*
* While the callback is invoked the table in which the components are
* stored is locked, which prevents mutations that could cause invalidation
* of the component references. Note that this is not an actual lock:
* invalid access causes a runtime panic and so it is still up to the
* application to ensure access is protected.
*
* The component arguments must be references and can be either const or
* non-const. When all arguments are const, the function will read-lock the
* table (see ecs_read_begin). If one or more arguments are non-const the
* function will write-lock the table (see ecs_write_begin).
*
* Example:
*
* @code
* e.get([](Position& p, Velocity& v) { // write lock
* p.x += v.x;
* });
*
* e.get([](const Position& p) { // read lock
* std::cout << p.x << std::endl;
* });
* @endcode
*
* @param func The callback to invoke.
* @return True if the entity has all components, false if not.
*/
template <typename Func, if_t< is_callable<Func>::value > = 0>
bool get(const Func& func) const;
/** Get enum constant.
*
* @tparam T The enum type for which to get the constant
* @return Constant entity if found, 0 entity if not.
*/
template <typename T, if_t< is_enum<T>::value > = 0>
const T* get() const;
/** Get the second part for a pair.
* This operation gets the value for a pair from the entity. The first
* part of the pair should not be a component.
*
* @tparam Second the second element of a pair.
* @param first The first part of the pair.
*/
template<typename Second>
const Second* get_second(flecs::entity_t first) const {
auto second = _::cpp_type<Second>::id(m_world);
ecs_assert(_::cpp_type<Second>::size() != 0, ECS_INVALID_PARAMETER, NULL);
return static_cast<const Second*>(
ecs_get_id(m_world, m_id, ecs_pair(first, second)));
}
/** Get the second part for a pair.
* This operation gets the value for a pair from the entity. The first
* part of the pair should not be a component.
*
* @tparam First The first element of the pair.
* @tparam Second the second element of a pair.
*/
template<typename First, typename Second>
const Second* get_second() const {
return get<pair_object<First, Second>>();
}
/** Get target for a given pair.
* This operation returns the target for a given pair. The optional
* index can be used to iterate through targets, in case the entity has
* multiple instances for the same relationship.
*
* @tparam First The first element of the pair.
* @param index The index (0 for the first instance of the relationship).
*/
template<typename First>
flecs::entity target(int32_t index = 0) const;
/** Get target for a given pair.
* This operation returns the target for a given pair. The optional
* index can be used to iterate through targets, in case the entity has
* multiple instances for the same relationship.
*
* @param first The first element of the pair for which to retrieve the target.
* @param index The index (0 for the first instance of the relationship).
*/
flecs::entity target(flecs::entity_t first, int32_t index = 0) const;
/** Get the target of a pair for a given relationship id.
* This operation returns the first entity that has the provided id by following
* the specified relationship. If the entity itself has the id then entity will
* be returned. If the id cannot be found on the entity or by following the
* relationship, the operation will return 0.
*
* This operation can be used to lookup, for example, which prefab is providing
* a component by specifying the IsA pair:
*
* @code
* // Is Position provided by the entity or one of its base entities?
* ecs_get_target_for_id(world, entity, EcsIsA, ecs_id(Position))
* @endcode
*
* @param relationship The relationship to follow.
* @param id The id to lookup.
* @return The entity for which the target has been found.
*/
flecs::entity target_for(flecs::entity_t relationship, flecs::id_t id) const;
template <typename T>
flecs::entity target_for(flecs::entity_t relationship) const;
template <typename First, typename Second>
flecs::entity target_for(flecs::entity_t relationship) const;
/** Get depth for given relationship.
*
* @param rel The relationship.
* @return The depth.
*/
int32_t depth(flecs::entity_t rel) const {
return ecs_get_depth(m_world, m_id, rel);
}
/** Get depth for given relationship.
*
* @tparam Rel The relationship.
* @return The depth.
*/
template<typename Rel>
int32_t depth() const {
return this->depth(_::cpp_type<Rel>::id(m_world));
}
/** Get parent of entity.
* Short for target(flecs::ChildOf).
*
* @return The parent of the entity.
*/
flecs::entity parent() const;
/** Lookup an entity by name.
* Lookup an entity in the scope of this entity. The provided path may
* contain double colons as scope separators, for example: "Foo::Bar".
*
* @param path The name of the entity to lookup.
* @param search_path When false, only the entity's scope is searched.
* @return The found entity, or entity::null if no entity matched.
*/
flecs::entity lookup(const char *path, bool search_path = false) const;
/** Check if entity has the provided entity.
*
* @param e The entity to check.
* @return True if the entity has the provided entity, false otherwise.
*/
bool has(flecs::id_t e) const {
return ecs_has_id(m_world, m_id, e);
}
/** Check if entity has the provided component.
*
* @tparam T The component to check.
* @return True if the entity has the provided component, false otherwise.
*/
template <typename T>
bool has() const {
flecs::id_t cid = _::cpp_type<T>::id(m_world);
bool result = ecs_has_id(m_world, m_id, cid);
if (result) {
return result;
}
if (is_enum<T>::value) {
return ecs_has_pair(m_world, m_id, cid, flecs::Wildcard);
}
return false;
}
/** Check if entity has the provided enum constant.
*
* @tparam E The enum type (can be deduced).
* @param value The enum constant to check.
* @return True if the entity has the provided constant, false otherwise.
*/
template <typename E, if_t< is_enum<E>::value > = 0>
bool has(E value) const {
auto r = _::cpp_type<E>::id(m_world);
auto o = enum_type<E>(m_world).entity(value);
return ecs_has_pair(m_world, m_id, r, o);
}
/** Check if entity has the provided pair.
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
* @return True if the entity has the provided component, false otherwise.
*/
template <typename First, typename Second>
bool has() const {
return this->has<First>(_::cpp_type<Second>::id(m_world));
}
/** Check if entity has the provided pair.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
* @return True if the entity has the provided component, false otherwise.
*/
template<typename First, typename Second, if_not_t< is_enum<Second>::value > = 0>
bool has(Second second) const {
auto comp_id = _::cpp_type<First>::id(m_world);
return ecs_has_id(m_world, m_id, ecs_pair(comp_id, second));
}
/** Check if entity has the provided pair.
*
* @tparam Second The second element of the pair.
* @param first The first element of the pair.
* @return True if the entity has the provided component, false otherwise.
*/
template <typename Second>
bool has_second(flecs::entity_t first) const {
return this->has(first, _::cpp_type<Second>::id(m_world));
}
/** Check if entity has the provided pair.
*
* @tparam First The first element of the pair.
* @param value The enum constant.
* @return True if the entity has the provided component, false otherwise.
*/
template<typename First, typename E, if_t< is_enum<E>::value > = 0>
bool has(E value) const {
const auto& et = enum_type<E>(this->m_world);
flecs::entity_t second = et.entity(value);
return has<First>(second);
}
/** Check if entity has the provided pair.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
* @return True if the entity has the provided component, false otherwise.
*/
bool has(flecs::id_t first, flecs::id_t second) const {
return ecs_has_id(m_world, m_id, ecs_pair(first, second));
}
/** Check if entity owns the provided entity.
* An entity is owned if it is not shared from a base entity.
*
* @param e The entity to check.
* @return True if the entity owns the provided entity, false otherwise.
*/
bool owns(flecs::id_t e) const {
return ecs_owns_id(m_world, m_id, e);
}
/** Check if entity owns the provided pair.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
* @return True if the entity owns the provided component, false otherwise.
*/
template <typename First>
bool owns(flecs::id_t second) const {
auto comp_id = _::cpp_type<First>::id(m_world);
return owns(ecs_pair(comp_id, second));
}
/** Check if entity owns the provided pair.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
* @return True if the entity owns the provided component, false otherwise.
*/
bool owns(flecs::id_t first, flecs::id_t second) const {
return owns(ecs_pair(first, second));
}
/** Check if entity owns the provided component.
* An component is owned if it is not shared from a base entity.
*
* @tparam T The component to check.
* @return True if the entity owns the provided component, false otherwise.
*/
template <typename T>
bool owns() const {
return owns(_::cpp_type<T>::id(m_world));
}
/** Check if entity owns the provided pair.
* An pair is owned if it is not shared from a base entity.
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
* @return True if the entity owns the provided pair, false otherwise.
*/
template <typename First, typename Second>
bool owns() const {
return owns(
_::cpp_type<First>::id(m_world),
_::cpp_type<Second>::id(m_world));
}
/** Test if id is enabled.
*
* @param id The id to test.
* @return True if enabled, false if not.
*/
bool enabled(flecs::id_t id) const {
return ecs_is_enabled_id(m_world, m_id, id);
}
/** Test if component is enabled.
*
* @tparam T The component to test.
* @return True if enabled, false if not.
*/
template<typename T>
bool enabled() const {
return this->enabled(_::cpp_type<T>::id(m_world));
}
/** Test if pair is enabled.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
* @return True if enabled, false if not.
*/
bool enabled(flecs::id_t first, flecs::id_t second) const {
return this->enabled(ecs_pair(first, second));
}
/** Test if pair is enabled.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
* @return True if enabled, false if not.
*/
template <typename First>
bool enabled(flecs::id_t second) const {
return this->enabled(_::cpp_type<First>::id(m_world), second);
}
/** Test if pair is enabled.
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
* @return True if enabled, false if not.
*/
template <typename First, typename Second>
bool enabled() const {
return this->enabled<First>(_::cpp_type<Second>::id(m_world));
}
flecs::entity clone(bool clone_value = true, flecs::entity_t dst_id = 0) const;
/** Return mutable entity handle for current stage
* When an entity handle created from the world is used while the world is
* in staged mode, it will only allow for readonly operations since
* structural changes are not allowed on the world while in staged mode.
*
* To do mutations on the entity, this operation provides a handle to the
* entity that uses the stage instead of the actual world.
*
* Note that staged entity handles should never be stored persistently, in
* components or elsewhere. An entity handle should always point to the
* main world.
*
* Also note that this operation is not necessary when doing mutations on an
* entity outside of a system. It is allowed to do entity operations
* directly on the world, as long as the world is not in staged mode.
*
* @param stage The current stage.
* @return An entity handle that allows for mutations in the current stage.
*/
flecs::entity mut(const flecs::world& stage) const;
/** Same as mut(world), but for iterator.
* This operation allows for the construction of a mutable entity handle
* from an iterator.
*
* @param it An iterator that contains a reference to the world or stage.
* @return An entity handle that allows for mutations in the current stage.
*/
flecs::entity mut(const flecs::iter& it) const;
/** Same as mut(world), but for entity.
* This operation allows for the construction of a mutable entity handle
* from another entity. This is useful in each() functions, which only
* provide a handle to the entity being iterated over.
*
* @param e Another mutable entity.
* @return An entity handle that allows for mutations in the current stage.
*/
flecs::entity mut(const flecs::entity_view& e) const;
# ifdef FLECS_JSON
/**
* @file addons/cpp/mixins/json/entity_view.inl
* @brief JSON entity mixin.
*/
/** Serialize entity to JSON.
*
* @memberof flecs::entity_view
* @ingroup cpp_addons_json
*/
flecs::string to_json(const flecs::entity_to_json_desc_t *desc = nullptr) const {
char *json = ecs_entity_to_json(m_world, m_id, desc);
return flecs::string(json);
}
# endif
# ifdef FLECS_DOC
/**
* @file addons/cpp/mixins/doc/entity_view.inl
* @brief Doc entity view mixin.
*/
/** Get human readable name.
*
* @see ecs_doc_get_name()
* @see flecs::doc::get_name()
* @see flecs::entity_builder::set_doc_name()
*
* @memberof flecs::entity_view
* @ingroup cpp_addons_doc
*/
const char* doc_name() const {
return ecs_doc_get_name(m_world, m_id);
}
/** Get brief description.
*
* @see ecs_doc_get_brief()
* @see flecs::doc::get_brief()
* @see flecs::entity_builder::set_doc_brief()
*
* @memberof flecs::entity_view
* @ingroup cpp_addons_doc
*/
const char* doc_brief() const {
return ecs_doc_get_brief(m_world, m_id);
}
/** Get detailed description.
*
* @see ecs_doc_get_detail()
* @see flecs::doc::get_detail()
* @see flecs::entity_builder::set_doc_detail()
*
* @memberof flecs::entity_view
* @ingroup cpp_addons_doc
*/
const char* doc_detail() const {
return ecs_doc_get_detail(m_world, m_id);
}
/** Get link to external documentation.
*
* @see ecs_doc_get_link()
* @see flecs::doc::get_link()
* @see flecs::entity_builder::set_doc_link()
*
* @memberof flecs::entity_view
* @ingroup cpp_addons_doc
*/
const char* doc_link() const {
return ecs_doc_get_link(m_world, m_id);
}
/** Get color.
*
* @see ecs_doc_get_color()
* @see flecs::doc::get_color()
* @see flecs::entity_builder::set_doc_color()
*
* @memberof flecs::entity_view
* @ingroup cpp_addons_doc
*/
const char* doc_color() const {
return ecs_doc_get_color(m_world, m_id);
}
# endif
# ifdef FLECS_ALERTS
/**
* @file addons/cpp/mixins/alerts/entity_view.inl
* @brief Alerts entity mixin.
*/
/** Return number of alerts for entity.
*
* @memberof flecs::entity_view
* @ingroup cpp_addons_alerts
*/
int32_t alert_count(flecs::entity_t alert = 0) const {
return ecs_get_alert_count(m_world, m_id, alert);
}
# endif
/**
* @file addons/cpp/mixins/enum/entity_view.inl
* @brief Enum entity view mixin.
*/
/** Convert entity to enum constant.
*
* @memberof flecs::entity_view
* @ingroup cpp_entities
*/
template <typename E>
E to_constant() const;
/**
* @file addons/cpp/mixins/event/entity_view.inl
* @brief Event entity mixin.
*/
/** Emit event for entity.
*
* @memberof flecs::entity_view
*
* @param evt The event to emit.
*/
void emit(flecs::entity_t evt) {
flecs::world(m_world)
.event(evt)
.entity(m_id)
.emit();
}
/** Emit event for entity.
*
* @memberof flecs::entity_view
*
* @param evt The event to emit.
*/
void emit(flecs::entity evt);
/** Emit event for entity.
*
* @memberof flecs::entity_view
*
* @tparam Evt The event to emit.
*/
template <typename Evt, if_t<is_empty<Evt>::value> = 0>
void emit() {
this->emit(_::cpp_type<Evt>::id(m_world));
}
/** Emit event with payload for entity.
*
* @memberof flecs::entity_view
*
* @tparam Evt The event to emit.
*/
template <typename Evt, if_not_t<is_empty<Evt>::value> = 0>
void emit(const Evt& payload) {
flecs::world(m_world)
.event(_::cpp_type<Evt>::id(m_world))
.entity(m_id)
.ctx(&payload)
.emit();
}
/** Enqueue event for entity.
*
* @memberof flecs::entity_view
*
* @param evt The event to enqueue.
*/
void enqueue(flecs::entity_t evt) {
flecs::world(m_world)
.event(evt)
.entity(m_id)
.enqueue();
}
/** Enqueue event for entity.
*
* @memberof flecs::entity_view
*
* @param evt The event to enqueue.
*/
void enqueue(flecs::entity evt);
/** Enqueue event for entity.
*
* @memberof flecs::entity_view
*
* @tparam Evt The event to enqueue.
*/
template <typename Evt, if_t<is_empty<Evt>::value> = 0>
void enqueue() {
this->enqueue(_::cpp_type<Evt>::id(m_world));
}
/** Enqueue event with payload for entity.
*
* @memberof flecs::entity_view
*
* @tparam Evt The event to enqueue.
*/
template <typename Evt, if_not_t<is_empty<Evt>::value> = 0>
void enqueue(const Evt& payload) {
flecs::world(m_world)
.event(_::cpp_type<Evt>::id(m_world))
.entity(m_id)
.ctx(&payload)
.enqueue();
}
private:
flecs::entity set_stage(world_t *stage);
};
}
/** @} */
/**
* @file addons/cpp/mixins/entity/builder.hpp
* @brief Entity builder.
*/
#pragma once
namespace flecs
{
/** Entity builder.
* @ingroup cpp_entities
*/
template <typename Self>
struct entity_builder : entity_view {
using entity_view::entity_view;
/** Add a component to an entity.
* To ensure the component is initialized, it should have a constructor.
*
* @tparam T the component type to add.
*/
template <typename T>
Self& add() {
flecs_static_assert(is_flecs_constructible<T>::value,
"cannot default construct type: add T::T() or use emplace<T>()");
ecs_add_id(this->m_world, this->m_id, _::cpp_type<T>::id(this->m_world));
return to_base();
}
/** Add pair for enum constant.
* This operation will add a pair to the entity where the first element is
* the enumeration type, and the second element the enumeration constant.
*
* The operation may be used with regular (C style) enumerations as well as
* enum classes.
*
* @param value The enumeration value.
*/
template <typename E, if_t< is_enum<E>::value > = 0>
Self& add(E value) {
flecs::entity_t first = _::cpp_type<E>::id(this->m_world);
const auto& et = enum_type<E>(this->m_world);
flecs::entity_t second = et.entity(value);
return this->add(first, second);
}
/** Add an entity to an entity.
* Add an entity to the entity. This is typically used for tagging.
*
* @param component The component to add.
*/
Self& add(id_t component) {
ecs_add_id(this->m_world, this->m_id, component);
return to_base();
}
/** Add a pair.
* This operation adds a pair to the entity.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
Self& add(entity_t first, entity_t second) {
ecs_add_pair(this->m_world, this->m_id, first, second);
return to_base();
}
/** Add a pair.
* This operation adds a pair to the entity.
*
* @tparam First The first element of the pair
* @tparam Second The second element of the pair
*/
template<typename First, typename Second>
Self& add() {
return this->add<First>(_::cpp_type<Second>::id(this->m_world));
}
/** Add a pair.
* This operation adds a pair to the entity.
*
* @tparam First The first element of the pair
* @param second The second element of the pair.
*/
template<typename First, typename Second, if_not_t< is_enum<Second>::value > = 0>
Self& add(Second second) {
flecs_static_assert(is_flecs_constructible<First>::value,
"cannot default construct type: add T::T() or use emplace<T>()");
return this->add(_::cpp_type<First>::id(this->m_world), second);
}
/** Add a pair.
* This operation adds a pair to the entity that consists out of a tag
* combined with an enum constant.
*
* @tparam First The first element of the pair
* @param constant the enum constant.
*/
template<typename First, typename Second, if_t< is_enum<Second>::value > = 0>
Self& add(Second constant) {
flecs_static_assert(is_flecs_constructible<First>::value,
"cannot default construct type: add T::T() or use emplace<T>()");
const auto& et = enum_type<Second>(this->m_world);
return this->add<First>(et.entity(constant));
}
/** Add a pair.
* This operation adds a pair to the entity.
*
* @param first The first element of the pair
* @tparam Second The second element of the pair
*/
template<typename Second>
Self& add_second(flecs::entity_t first) {
return this->add(first, _::cpp_type<Second>::id(this->m_world));
}
/** Conditional add.
* This operation adds if condition is true, removes if condition is false.
*
* @param cond The condition to evaluate.
* @param component The component to add.
*/
Self& add_if(bool cond, flecs::id_t component) {
if (cond) {
return this->add(component);
} else {
return this->remove(component);
}
}
/** Conditional add.
* This operation adds if condition is true, removes if condition is false.
*
* @tparam T The component to add.
* @param cond The condition to evaluate.
*/
template <typename T>
Self& add_if(bool cond) {
if (cond) {
return this->add<T>();
} else {
return this->remove<T>();
}
}
/** Conditional add.
* This operation adds if condition is true, removes if condition is false.
*
* @param cond The condition to evaluate.
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
Self& add_if(bool cond, flecs::entity_t first, flecs::entity_t second) {
if (cond) {
return this->add(first, second);
} else {
/* If second is 0 or if relationship is exclusive, use wildcard for
* second which will remove all instances of the relationship.
* Replacing 0 with Wildcard will make it possible to use the second
* as the condition. */
if (!second || ecs_has_id(this->m_world, first, flecs::Exclusive)) {
second = flecs::Wildcard;
}
return this->remove(first, second);
}
}
/** Conditional add.
* This operation adds if condition is true, removes if condition is false.
*
* @tparam First The first element of the pair
* @param cond The condition to evaluate.
* @param second The second element of the pair.
*/
template <typename First>
Self& add_if(bool cond, flecs::entity_t second) {
return this->add_if(cond, _::cpp_type<First>::id(this->m_world), second);
}
/** Conditional add.
* This operation adds if condition is true, removes if condition is false.
*
* @tparam First The first element of the pair
* @tparam Second The second element of the pair
* @param cond The condition to evaluate.
*/
template <typename First, typename Second>
Self& add_if(bool cond) {
return this->add_if<First>(cond, _::cpp_type<Second>::id(this->m_world));
}
/** Conditional add.
* This operation adds if condition is true, removes if condition is false.
*
* @param cond The condition to evaluate.
* @param constant The enumeration constant.
*/
template <typename E, if_t< is_enum<E>::value > = 0>
Self& add_if(bool cond, E constant) {
const auto& et = enum_type<E>(this->m_world);
return this->add_if<E>(cond, et.entity(constant));
}
/** Shortcut for add(IsA, entity).
*
* @param second The second element of the pair.
*/
Self& is_a(entity_t second) {
return this->add(flecs::IsA, second);
}
/** Shortcut for add(IsA, entity).
*
* @tparam T the type associated with the entity.
*/
template <typename T>
Self& is_a() {
return this->add(flecs::IsA, _::cpp_type<T>::id(this->m_world));
}
/** Shortcut for add(ChildOf, entity).
*
* @param second The second element of the pair.
*/
Self& child_of(entity_t second) {
return this->add(flecs::ChildOf, second);
}
/** Shortcut for add(DependsOn, entity).
*
* @param second The second element of the pair.
*/
Self& depends_on(entity_t second) {
return this->add(flecs::DependsOn, second);
}
/** Shortcut for add(SlotOf, entity).
*
* @param second The second element of the pair.
*/
Self& slot_of(entity_t second) {
return this->add(flecs::SlotOf, second);
}
/** Shortcut for add(SlotOf, target(ChildOf)).
*/
Self& slot() {
ecs_check(ecs_get_target(m_world, m_id, flecs::ChildOf, 0),
ECS_INVALID_PARAMETER, "add ChildOf pair before using slot()");
return this->slot_of(this->target(flecs::ChildOf));
error:
return to_base();
}
/** Shortcut for add(ChildOf, entity).
*
* @tparam T the type associated with the entity.
*/
template <typename T>
Self& child_of() {
return this->child_of(_::cpp_type<T>::id(this->m_world));
}
/** Shortcut for add(DependsOn, entity).
*
* @tparam T the type associated with the entity.
*/
template <typename T>
Self& depends_on() {
return this->depends_on(_::cpp_type<T>::id(this->m_world));
}
/** Shortcut for add(SlotOf, entity).
*
* @tparam T the type associated with the entity.
*/
template <typename T>
Self& slot_of() {
return this->slot_of(_::cpp_type<T>::id(this->m_world));
}
/** Remove a component from an entity.
*
* @tparam T the type of the component to remove.
*/
template <typename T, if_not_t< is_enum<T>::value > = 0>
Self& remove() {
ecs_remove_id(this->m_world, this->m_id, _::cpp_type<T>::id(this->m_world));
return to_base();
}
/** Remove pair for enum.
* This operation will remove any (Enum, *) pair from the entity.
*
* @tparam E The enumeration type.
*/
template <typename E, if_t< is_enum<E>::value > = 0>
Self& remove() {
flecs::entity_t first = _::cpp_type<E>::id(this->m_world);
return this->remove(first, flecs::Wildcard);
}
/** Remove an entity from an entity.
*
* @param entity The entity to remove.
*/
Self& remove(entity_t entity) {
ecs_remove_id(this->m_world, this->m_id, entity);
return to_base();
}
/** Remove a pair.
* This operation removes a pair from the entity.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
Self& remove(entity_t first, entity_t second) {
ecs_remove_pair(this->m_world, this->m_id, first, second);
return to_base();
}
/** Removes a pair.
* This operation removes a pair from the entity.
*
* @tparam First The first element of the pair
* @tparam Second The second element of the pair
*/
template<typename First, typename Second>
Self& remove() {
return this->remove<First>(_::cpp_type<Second>::id(this->m_world));
}
/** Remove a pair.
* This operation removes the pair from the entity.
*
* @tparam First The first element of the pair
* @param second The second element of the pair.
*/
template<typename First, typename Second, if_not_t< is_enum<Second>::value > = 0>
Self& remove(Second second) {
return this->remove(_::cpp_type<First>::id(this->m_world), second);
}
/** Removes a pair.
* This operation removes a pair from the entity.
*
* @tparam Second The second element of the pair
* @param first The first element of the pair
*/
template<typename Second>
Self& remove_second(flecs::entity_t first) {
return this->remove(first, _::cpp_type<Second>::id(this->m_world));
}
/** Remove a pair.
* This operation removes the pair from the entity.
*
* @tparam First The first element of the pair
* @param constant the enum constant.
*/
template<typename First, typename Second, if_t< is_enum<Second>::value > = 0>
Self& remove(Second constant) {
const auto& et = enum_type<Second>(this->m_world);
flecs::entity_t second = et.entity(constant);
return this->remove<First>(second);
}
/** Mark id for auto-overriding.
* When an entity inherits from a base entity (using the IsA relationship)
* any ids marked for auto-overriding on the base will be overridden
* automatically by the entity.
*
* @param id The id to mark for overriding.
*/
Self& override(flecs::id_t id) {
return this->add(ECS_OVERRIDE | id);
}
/** Mark pair for auto-overriding.
* @see override(flecs::id_t id)
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
Self& override(flecs::entity_t first, flecs::entity_t second) {
return this->override(ecs_pair(first, second));
}
/** Mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam T The component to mark for overriding.
*/
template <typename T>
Self& override() {
return this->override(_::cpp_type<T>::id(this->m_world));
}
/** Mark pair for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
*/
template <typename First>
Self& override(flecs::entity_t second) {
return this->override(_::cpp_type<First>::id(this->m_world), second);
}
/** Mark pair for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
*/
template <typename First, typename Second>
Self& override() {
return this->override<First>(_::cpp_type<Second>::id(this->m_world));
}
/** Set component, mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam T The component to set and for which to add the OVERRIDE flag
*/
template <typename T>
Self& set_override(const T& val) {
this->override<T>();
return this->set<T>(val);
}
/** Set component, mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam T The component to set and for which to add the OVERRIDE flag
*/
template <typename T>
Self& set_override(T&& val) {
this->override<T>();
return this->set<T>(FLECS_FWD(val));
}
/** Set pair, mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
*/
template <typename First>
Self& set_override(flecs::entity_t second, const First& val) {
this->override<First>(second);
return this->set<First>(second, val);
}
/** Set pair, mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
*/
template <typename First>
Self& set_override(flecs::entity_t second, First&& val) {
this->override<First>(second);
return this->set<First>(second, FLECS_FWD(val));
}
/** Set component, mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
*/
template <typename First, typename Second, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
Self& set_override(const A& val) {
this->override<First, Second>();
return this->set<First, Second>(val);
}
/** Set component, mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
*/
template <typename First, typename Second, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
Self& set_override(A&& val) {
this->override<First, Second>();
return this->set<First, Second>(FLECS_FWD(val));
}
/** Emplace component, mark component for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam T The component to emplace and override.
*/
template <typename T, typename ... Args>
Self& emplace_override(Args&&... args) {
this->override<T>();
flecs::emplace<T>(this->m_world, this->m_id,
_::cpp_type<T>::id(this->m_world), FLECS_FWD(args)...);
return to_base();
}
/** Emplace pair, mark pair for auto-overriding.
* @see override(flecs::id_t id)
*
* @tparam First The first element of the pair to emplace and override.
* @tparam Second The second element of the pair to emplace and override.
*/
template <typename First, typename Second, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0,
typename ... Args>
Self& emplace_override(Args&&... args) {
this->override<First, Second>();
flecs::emplace<A>(this->m_world, this->m_id,
ecs_pair(_::cpp_type<First>::id(this->m_world),
_::cpp_type<Second>::id(this->m_world)),
FLECS_FWD(args)...);
return to_base();
}
/** Enable an entity.
* Enabled entities are matched with systems and can be searched with
* queries.
*/
Self& enable() {
ecs_enable(this->m_world, this->m_id, true);
return to_base();
}
/** Disable an entity.
* Disabled entities are not matched with systems and cannot be searched
* with queries, unless explicitly specified in the query expression.
*/
Self& disable() {
ecs_enable(this->m_world, this->m_id, false);
return to_base();
}
/** Enable an id.
* This sets the enabled bit for this component. If this is the first time
* the component is enabled or disabled, the bitset is added.
*
* @param id The id to enable.
* @param toggle True to enable, false to disable (default = true).
*/
Self& enable(flecs::id_t id, bool toggle = true) {
ecs_enable_id(this->m_world, this->m_id, id, toggle);
return to_base();
}
/** Enable a component.
* @see enable(flecs::id_t id)
*
* @tparam T The component to enable.
*/
template<typename T>
Self& enable() {
return this->enable(_::cpp_type<T>::id(this->m_world));
}
/** Enable a pair.
* @see enable(flecs::id_t id)
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
Self& enable(flecs::id_t first, flecs::id_t second) {
return this->enable(ecs_pair(first, second));
}
/** Enable a pair.
* @see enable(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
*/
template<typename First>
Self& enable(flecs::id_t second) {
return this->enable(_::cpp_type<First>::id(), second);
}
/** Enable a pair.
* @see enable(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
*/
template<typename First, typename Second>
Self& enable() {
return this->enable<First>(_::cpp_type<Second>::id());
}
/** Disable an id.
* This sets the enabled bit for this id. If this is the first time
* the id is enabled or disabled, the bitset is added.
*
* @param id The id to disable.
*/
Self& disable(flecs::id_t id) {
return this->enable(id, false);
}
/** Disable a component.
* @see disable(flecs::id_t id)
*
* @tparam T The component to enable.
*/
template<typename T>
Self& disable() {
return this->disable(_::cpp_type<T>::id());
}
/** Disable a pair.
* @see disable(flecs::id_t id)
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
Self& disable(flecs::id_t first, flecs::id_t second) {
return this->disable(ecs_pair(first, second));
}
/** Disable a pair.
* @see disable(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
*/
template<typename First>
Self& disable(flecs::id_t second) {
return this->disable(_::cpp_type<First>::id(), second);
}
/** Disable a pair.
* @see disable(flecs::id_t id)
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
*/
template<typename First, typename Second>
Self& disable() {
return this->disable<First>(_::cpp_type<Second>::id());
}
Self& set_ptr(entity_t comp, size_t size, const void *ptr) {
ecs_set_id(this->m_world, this->m_id, comp, size, ptr);
return to_base();
}
Self& set_ptr(entity_t comp, const void *ptr) {
const flecs::Component *cptr = ecs_get(
this->m_world, comp, EcsComponent);
/* Can't set if it's not a component */
ecs_assert(cptr != NULL, ECS_INVALID_PARAMETER, NULL);
return set_ptr(comp, cptr->size, ptr);
}
template<typename T, if_t<
!is_callable<T>::value && is_actual<T>::value> = 0 >
Self& set(T&& value) {
flecs::set<T>(this->m_world, this->m_id, FLECS_FWD(value));
return to_base();
}
template<typename T, if_t<
!is_callable<T>::value && is_actual<T>::value > = 0>
Self& set(const T& value) {
flecs::set<T>(this->m_world, this->m_id, value);
return to_base();
}
template<typename T, typename A = actual_type_t<T>, if_not_t<
is_callable<T>::value || is_actual<T>::value > = 0>
Self& set(A&& value) {
flecs::set<T>(this->m_world, this->m_id, FLECS_FWD(value));
return to_base();
}
template<typename T, typename A = actual_type_t<T>, if_not_t<
is_callable<T>::value || is_actual<T>::value > = 0>
Self& set(const A& value) {
flecs::set<T>(this->m_world, this->m_id, value);
return to_base();
}
/** Set a pair for an entity.
* This operation sets the pair value, and uses First as type. If the
* entity did not yet have the pair, it will be added.
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair
* @param value The value to set.
*/
template <typename First, typename Second, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
Self& set(A&& value) {
flecs::set<P>(this->m_world, this->m_id, FLECS_FWD(value));
return to_base();
}
/** Set a pair for an entity.
* This operation sets the pair value, and uses First as type. If the
* entity did not yet have the pair, it will be added.
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair
* @param value The value to set.
*/
template <typename First, typename Second, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
Self& set(const A& value) {
flecs::set<P>(this->m_world, this->m_id, value);
return to_base();
}
/** Set a pair for an entity.
* This operation sets the pair value, and uses First as type. If the
* entity did not yet have the pair, it will be added.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
* @param value The value to set.
*/
template <typename First, typename Second, if_not_t< is_enum<Second>::value > = 0>
Self& set(Second second, const First& value) {
auto first = _::cpp_type<First>::id(this->m_world);
flecs::set(this->m_world, this->m_id, value,
ecs_pair(first, second));
return to_base();
}
/** Set a pair for an entity.
* This operation sets the pair value, and uses First as type. If the
* entity did not yet have the pair, it will be added.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
* @param value The value to set.
*/
template <typename First, typename Second, if_not_t< is_enum<Second>::value > = 0>
Self& set(Second second, First&& value) {
auto first = _::cpp_type<First>::id(this->m_world);
flecs::set(this->m_world, this->m_id, FLECS_FWD(value),
ecs_pair(first, second));
return to_base();
}
/** Set a pair for an entity.
* This operation sets the pair value, and uses First as type. If the
* entity did not yet have the pair, it will be added.
*
* @tparam First The first element of the pair.
* @param constant The enum constant.
* @param value The value to set.
*/
template <typename First, typename Second, if_t< is_enum<Second>::value > = 0>
Self& set(Second constant, const First& value) {
const auto& et = enum_type<Second>(this->m_world);
flecs::entity_t second = et.entity(constant);
return set<First>(second, value);
}
/** Set a pair for an entity.
* This operation sets the pair value, and uses Second as type. If the
* entity did not yet have the pair, it will be added.
*
* @tparam Second The second element of the pair
* @param first The first element of the pair.
* @param value The value to set.
*/
template <typename Second>
Self& set_second(entity_t first, const Second& value) {
auto second = _::cpp_type<Second>::id(this->m_world);
flecs::set(this->m_world, this->m_id, value,
ecs_pair(first, second));
return to_base();
}
/** Set a pair for an entity.
* This operation sets the pair value, and uses Second as type. If the
* entity did not yet have the pair, it will be added.
*
* @tparam Second The second element of the pair
* @param first The first element of the pair.
* @param value The value to set.
*/
template <typename Second>
Self& set_second(entity_t first, Second&& value) {
auto second = _::cpp_type<Second>::id(this->m_world);
flecs::set(this->m_world, this->m_id, FLECS_FWD(value),
ecs_pair(first, second));
return to_base();
}
template <typename First, typename Second>
Self& set_second(const Second& value) {
flecs::set<pair_object<First, Second>>(this->m_world, this->m_id, value);
return to_base();
}
/** Set 1..N components.
* This operation accepts a callback with as arguments the components to
* set. If the entity does not have all of the provided components, they
* will be added.
*
* This operation is faster than individually calling get for each component
* as it only obtains entity metadata once. When this operation is called
* while deferred, its performance is equivalent to that of calling get_mut
* for each component separately.
*
* The operation will invoke modified for each component after the callback
* has been invoked.
*
* @param func The callback to invoke.
*/
template <typename Func, if_t< is_callable<Func>::value > = 0>
Self& set(const Func& func);
/** Emplace component.
* Emplace constructs a component in the storage, which prevents calling the
* destructor on the value passed into the function.
*
* Emplace attempts the following signatures to construct the component:
*
* @code
* T{Args...}
* T{flecs::entity, Args...}
* @endcode
*
* If the second signature matches, emplace will pass in the current entity
* as argument to the constructor, which is useful if the component needs
* to be aware of the entity to which it has been added.
*
* Emplace may only be called for components that have not yet been added
* to the entity.
*
* @tparam T the component to emplace
* @param args The arguments to pass to the constructor of T
*/
template<typename T, typename ... Args, typename A = actual_type_t<T>>
Self& emplace(Args&&... args) {
flecs::emplace<A>(this->m_world, this->m_id,
_::cpp_type<T>::id(this->m_world), FLECS_FWD(args)...);
return to_base();
}
template <typename First, typename Second, typename ... Args, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
Self& emplace(Args&&... args) {
flecs::emplace<A>(this->m_world, this->m_id,
ecs_pair(_::cpp_type<First>::id(this->m_world),
_::cpp_type<Second>::id(this->m_world)),
FLECS_FWD(args)...);
return to_base();
}
template <typename First, typename ... Args>
Self& emplace_first(flecs::entity_t second, Args&&... args) {
flecs::emplace<First>(this->m_world, this->m_id,
ecs_pair(_::cpp_type<First>::id(this->m_world), second),
FLECS_FWD(args)...);
return to_base();
}
template <typename Second, typename ... Args>
Self& emplace_second(flecs::entity_t first, Args&&... args) {
flecs::emplace<Second>(this->m_world, this->m_id,
ecs_pair(first, _::cpp_type<Second>::id(this->m_world)),
FLECS_FWD(args)...);
return to_base();
}
/** Entities created in function will have the current entity.
* This operation is thread safe.
*
* @param func The function to call.
*/
template <typename Func>
Self& with(const Func& func) {
ecs_id_t prev = ecs_set_with(this->m_world, this->m_id);
func();
ecs_set_with(this->m_world, prev);
return to_base();
}
/** Entities created in function will have (First, this).
* This operation is thread safe.
*
* @tparam First The first element of the pair
* @param func The function to call.
*/
template <typename First, typename Func>
Self& with(const Func& func) {
with(_::cpp_type<First>::id(this->m_world), func);
return to_base();
}
/** Entities created in function will have (first, this).
* This operation is thread safe.
*
* @param first The first element of the pair.
* @param func The function to call.
*/
template <typename Func>
Self& with(entity_t first, const Func& func) {
ecs_id_t prev = ecs_set_with(this->m_world,
ecs_pair(first, this->m_id));
func();
ecs_set_with(this->m_world, prev);
return to_base();
}
/** The function will be ran with the scope set to the current entity. */
template <typename Func>
Self& scope(const Func& func) {
ecs_entity_t prev = ecs_set_scope(this->m_world, this->m_id);
func();
ecs_set_scope(this->m_world, prev);
return to_base();
}
/** Return world scoped to entity */
scoped_world scope() const {
return scoped_world(m_world, m_id);
}
/* Set the entity name.
*/
Self& set_name(const char *name) {
ecs_set_name(this->m_world, this->m_id, name);
return to_base();
}
/* Set entity alias.
*/
Self& set_alias(const char *name) {
ecs_set_alias(this->m_world, this->m_id, name);
return to_base();
}
# ifdef FLECS_DOC
/**
* @file addons/cpp/mixins/doc/entity_builder.inl
* @brief Doc entity builder mixin.
*/
/** Set human readable name.
* This adds `(flecs.doc.Description, flecs.Name)` to the entity.
*
* @see ecs_doc_set_name()
* @see flecs::doc::set_name()
* @see flecs::entity_view::doc_name()
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_doc
*/
Self& set_doc_name(const char *name) {
ecs_doc_set_name(m_world, m_id, name);
return to_base();
}
/** Set brief description.
* This adds `(flecs.doc.Description, flecs.doc.Brief)` to the entity.
*
* @see ecs_doc_set_brief()
* @see flecs::doc::set_brief()
* @see flecs::entity_view::doc_brief()
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_doc
*/
Self& set_doc_brief(const char *brief) {
ecs_doc_set_brief(m_world, m_id, brief);
return to_base();
}
/** Set detailed description.
* This adds `(flecs.doc.Description, flecs.doc.Detail)` to the entity.
*
* @see ecs_doc_set_detail()
* @see flecs::doc::set_detail()
* @see flecs::entity_view::doc_detail()
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_doc
*/
Self& set_doc_detail(const char *detail) {
ecs_doc_set_detail(m_world, m_id, detail);
return to_base();
}
/** Set link to external documentation.
* This adds `(flecs.doc.Description, flecs.doc.Link)` to the entity.
*
* @see ecs_doc_set_link()
* @see flecs::doc::set_link()
* @see flecs::entity_view::doc_link()
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_doc
*/
Self& set_doc_link(const char *link) {
ecs_doc_set_link(m_world, m_id, link);
return to_base();
}
/** Set doc color.
* This adds `(flecs.doc.Description, flecs.doc.Color)` to the entity.
*
* @see ecs_doc_set_color()
* @see flecs::doc::set_color()
* @see flecs::entity_view::doc_color()
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_doc
*/
Self& set_doc_color(const char *link) {
ecs_doc_set_color(m_world, m_id, link);
return to_base();
}
# endif
# ifdef FLECS_META
/**
* @file addons/cpp/mixins/meta/entity_builder.inl
* @brief Meta entity builder mixin.
*/
/**
* @memberof flecs::entity_view
* @ingroup cpp_addons_meta
*
* @{
*/
/** Make entity a unit */
Self& unit(
const char *symbol,
flecs::entity_t prefix = 0,
flecs::entity_t base = 0,
flecs::entity_t over = 0,
int32_t factor = 0,
int32_t power = 0)
{
ecs_unit_desc_t desc = {};
desc.entity = this->m_id;
desc.symbol = const_cast<char*>(symbol); /* safe, will be copied in */
desc.base = base;
desc.over = over;
desc.prefix = prefix;
desc.translation.factor = factor;
desc.translation.power = power;
ecs_unit_init(this->world(), &desc);
return to_base();
}
/** Make entity a derived unit */
Self& unit(
flecs::entity_t prefix = 0,
flecs::entity_t base = 0,
flecs::entity_t over = 0,
int32_t factor = 0,
int32_t power = 0)
{
ecs_unit_desc_t desc = {};
desc.entity = this->m_id;
desc.base = base;
desc.over = over;
desc.prefix = prefix;
desc.translation.factor = factor;
desc.translation.power = power;
ecs_unit_init(this->world(), &desc);
return to_base();
}
/** Make entity a derived unit */
Self& unit_prefix(
const char *symbol,
int32_t factor = 0,
int32_t power = 0)
{
ecs_unit_prefix_desc_t desc = {};
desc.entity = this->m_id;
desc.symbol = const_cast<char*>(symbol); /* safe, will be copied in */
desc.translation.factor = factor;
desc.translation.power = power;
ecs_unit_prefix_init(this->world(), &desc);
return to_base();
}
/** Add quantity to unit */
Self& quantity(flecs::entity_t quantity) {
ecs_add_pair(this->world(), this->id(), flecs::Quantity, quantity);
return to_base();
}
/** Make entity a unity prefix */
template <typename Quantity>
Self& quantity() {
return this->quantity(_::cpp_type<Quantity>::id(this->world()));
}
/** Make entity a quantity */
Self& quantity() {
ecs_add_id(this->world(), this->id(), flecs::Quantity);
return to_base();
}
/** @} */
# endif
# ifdef FLECS_JSON
/**
* @file addons/cpp/mixins/json/entity_builder.inl
* @brief JSON entity mixin.
*/
/** Set component from JSON.
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_json
*/
Self& set_json(
flecs::id_t e,
const char *json,
flecs::from_json_desc_t *desc = nullptr)
{
flecs::entity_t type = ecs_get_typeid(m_world, e);
if (!type) {
ecs_err("id is not a type");
return to_base();
}
void *ptr = ecs_get_mut_id(m_world, m_id, e);
ecs_assert(ptr != NULL, ECS_INTERNAL_ERROR, NULL);
ecs_ptr_from_json(m_world, type, ptr, json, desc);
ecs_modified_id(m_world, m_id, e);
return to_base();
}
/** Set pair from JSON.
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_json
*/
Self& set_json(
flecs::entity_t r,
flecs::entity_t t,
const char *json,
flecs::from_json_desc_t *desc = nullptr)
{
return set_json(ecs_pair(r, t), json, desc);
}
/** Set component from JSON.
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_json
*/
template <typename T>
Self& set_json(
const char *json,
flecs::from_json_desc_t *desc = nullptr)
{
return set_json(_::cpp_type<T>::id(m_world), json, desc);
}
/** Set pair from JSON.
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_json
*/
template <typename R, typename T>
Self& set_json(
const char *json,
flecs::from_json_desc_t *desc = nullptr)
{
return set_json(
_::cpp_type<R>::id(m_world),
_::cpp_type<T>::id(m_world),
json, desc);
}
/** Set pair from JSON.
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_json
*/
template <typename R>
Self& set_json(
flecs::entity_t t,
const char *json,
flecs::from_json_desc_t *desc = nullptr)
{
return set_json(
_::cpp_type<R>::id(m_world), t,
json, desc);
}
/** Set pair from JSON.
*
* @memberof flecs::entity_builder
* @ingroup cpp_addons_json
*/
template <typename T>
Self& set_json_second(
flecs::entity_t r,
const char *json,
flecs::from_json_desc_t *desc = nullptr)
{
return set_json(
r, _::cpp_type<T>::id(m_world),
json, desc);
}
# endif
/**
* @file addons/cpp/mixins/event/entity_builder.inl
* @brief Event entity mixin.
*/
/** Observe event on entity
*
* @memberof flecs::entity_builder
*
* @param evt The event id.
* @param callback The observer callback.
* @return Event builder.
*/
template <typename Func>
Self& observe(flecs::entity_t evt, Func&& callback);
/** Observe event on entity
*
* @memberof flecs::entity_builder
*
* @tparam Evt The event type.
* @param callback The observer callback.
* @return Event builder.
*/
template <typename Evt, typename Func>
Self& observe(Func&& callback);
/** Observe event on entity
*
* @memberof flecs::entity_builder
*
* @param callback The observer callback.
* @return Event builder.
*/
template <typename Func>
Self& observe(Func&& callback);
protected:
Self& to_base() {
return *static_cast<Self*>(this);
}
};
}
/**
* @defgroup cpp_entities Entities
* @ingroup cpp_core
* Entity operations.
*
* @{
*/
namespace flecs
{
/** Entity.
* Class with read/write operations for entities.
*
* @ingroup cpp_entities
*/
struct entity : entity_builder<entity>
{
entity() : entity_builder<entity>() { }
/** Create entity.
*
* @param world The world in which to create the entity.
*/
explicit entity(world_t *world)
: entity_builder()
{
m_world = world;
m_id = ecs_new(world, 0);
}
/** Wrap an existing entity id.
*
* @param world The world in which the entity is created.
* @param id The entity id.
*/
explicit entity(const flecs::world_t *world, flecs::id_t id) {
m_world = const_cast<flecs::world_t*>(world);
m_id = id;
}
/** Create a named entity.
* Named entities can be looked up with the lookup functions. Entity names
* may be scoped, where each element in the name is separated by "::".
* For example: "Foo::Bar". If parts of the hierarchy in the scoped name do
* not yet exist, they will be automatically created.
*
* @param world The world in which to create the entity.
* @param name The entity name.
*/
explicit entity(world_t *world, const char *name)
: entity_builder()
{
m_world = world;
ecs_entity_desc_t desc = {};
desc.name = name;
desc.sep = "::";
desc.root_sep = "::";
m_id = ecs_entity_init(world, &desc);
}
/** Conversion from flecs::entity_t to flecs::entity.
*
* @param id The entity_t value to convert.
*/
explicit entity(entity_t id)
: entity_builder( nullptr, id ) { }
/** Get mutable component value.
* This operation returns a mutable pointer to the component. If the entity
* did not yet have the component, it will be added. If a base entity had
* the component, it will be overridden, and the value of the base component
* will be copied to the entity before this function returns.
*
* @tparam T The component to get.
* @return Pointer to the component value.
*/
template <typename T>
T* get_mut() const {
auto comp_id = _::cpp_type<T>::id(m_world);
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
return static_cast<T*>(ecs_get_mut_id(m_world, m_id, comp_id));
}
/** Get mutable component value (untyped).
* This operation returns a mutable pointer to the component. If the entity
* did not yet have the component, it will be added. If a base entity had
* the component, it will be overridden, and the value of the base component
* will be copied to the entity before this function returns.
*
* @param comp The component to get.
* @return Pointer to the component value.
*/
void* get_mut(entity_t comp) const {
return ecs_get_mut_id(m_world, m_id, comp);
}
/** Get mutable pointer for a pair.
* This operation gets the value for a pair from the entity.
*
* @tparam First The first part of the pair.
* @tparam Second the second part of the pair.
*/
template <typename First, typename Second, typename P = pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
A* get_mut() const {
return static_cast<A*>(ecs_get_mut_id(m_world, m_id, ecs_pair(
_::cpp_type<First>::id(m_world),
_::cpp_type<Second>::id(m_world))));
}
/** Get mutable pointer for the first element of a pair.
* This operation gets the value for a pair from the entity.
*
* @tparam First The first part of the pair.
* @param second The second element of the pair.
*/
template <typename First>
First* get_mut(entity_t second) const {
auto comp_id = _::cpp_type<First>::id(m_world);
ecs_assert(_::cpp_type<First>::size() != 0, ECS_INVALID_PARAMETER, NULL);
return static_cast<First*>(
ecs_get_mut_id(m_world, m_id, ecs_pair(comp_id, second)));
}
/** Get mutable pointer for a pair (untyped).
* This operation gets the value for a pair from the entity. If neither the
* first nor second element of the pair is a component, the operation will
* fail.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
void* get_mut(entity_t first, entity_t second) const {
return ecs_get_mut_id(m_world, m_id, ecs_pair(first, second));
}
/** Get mutable pointer for the second element of a pair.
* This operation gets the value for a pair from the entity.
*
* @tparam Second The second element of the pair.
* @param first The first element of the pair.
*/
template <typename Second>
Second* get_mut_second(entity_t first) const {
auto second = _::cpp_type<Second>::id(m_world);
ecs_assert(_::cpp_type<Second>::size() != 0, ECS_INVALID_PARAMETER, NULL);
return static_cast<Second*>(
ecs_get_mut_id(m_world, m_id, ecs_pair(first, second)));
}
/** Signal that component was modified.
*
* @tparam T component that was modified.
*/
template <typename T>
void modified() const {
auto comp_id = _::cpp_type<T>::id(m_world);
ecs_assert(_::cpp_type<T>::size() != 0, ECS_INVALID_PARAMETER, NULL);
this->modified(comp_id);
}
/** Signal that the first element of a pair was modified.
*
* @tparam First The first part of the pair.
* @tparam Second the second part of the pair.
*/
template <typename First, typename Second>
void modified() const {
this->modified<First>(_::cpp_type<Second>::id(m_world));
}
/** Signal that the first part of a pair was modified.
*
* @tparam First The first part of the pair.
* @param second The second element of the pair.
*/
template <typename First>
void modified(entity_t second) const {
auto first = _::cpp_type<First>::id(m_world);
ecs_assert(_::cpp_type<First>::size() != 0, ECS_INVALID_PARAMETER, NULL);
this->modified(first, second);
}
/** Signal that a pair has modified (untyped).
* If neither the first or second element of the pair are a component, the
* operation will fail.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
*/
void modified(entity_t first, entity_t second) const {
this->modified(ecs_pair(first, second));
}
/** Signal that component was modified.
*
* @param comp component that was modified.
*/
void modified(entity_t comp) const {
ecs_modified_id(m_world, m_id, comp);
}
/** Get reference to component.
* A reference allows for quick and safe access to a component value, and is
* a faster alternative to repeatedly calling 'get' for the same component.
*
* @tparam T component for which to get a reference.
* @return The reference.
*/
template <typename T>
ref<T> get_ref() const {
return ref<T>(m_world, m_id, _::cpp_type<T>::id(m_world));
}
template <typename First, typename Second, typename P = flecs::pair<First, Second>,
typename A = actual_type_t<P>>
ref<A> get_ref() const {
return ref<A>(m_world, m_id,
ecs_pair(_::cpp_type<First>::id(m_world),
_::cpp_type<Second>::id(m_world)));
}
template <typename First>
ref<First> get_ref(flecs::entity_t second) const {
return ref<First>(m_world, m_id,
ecs_pair(_::cpp_type<First>::id(m_world), second));
}
template <typename Second>
ref<Second> get_ref_second(flecs::entity_t first) const {
return ref<Second>(m_world, m_id,
ecs_pair(first, _::cpp_type<Second>::id(m_world)));
}
/** Recursively flatten relationship.
* @see ecs_flatten
*/
void flatten(flecs::entity_t r, const ecs_flatten_desc_t *desc = nullptr) {
ecs_flatten(m_world, ecs_pair(r, m_id), desc);
}
/** Clear an entity.
* This operation removes all components from an entity without recycling
* the entity id.
*/
void clear() const {
ecs_clear(m_world, m_id);
}
/** Delete an entity.
* Entities have to be deleted explicitly, and are not deleted when the
* entity object goes out of scope.
*/
void destruct() const {
ecs_delete(m_world, m_id);
}
/** Return entity as entity_view.
* This returns an entity_view instance for the entity which is a readonly
* version of the entity class.
*
* This is similar to a regular upcast, except that this method ensures that
* the entity_view instance is instantiated with a world vs. a stage, which
* a regular upcast does not guarantee.
*/
flecs::entity_view view() const {
return flecs::entity_view(
const_cast<flecs::world_t*>(ecs_get_world(m_world)), m_id);
}
/** Entity id 0.
* This function is useful when the API must provide an entity that
* belongs to a world, but the entity id is 0.
*
* @param world The world.
*/
static
flecs::entity null(const flecs::world_t *world) {
flecs::entity result;
result.m_world = const_cast<flecs::world_t*>(world);
return result;
}
static
flecs::entity null() {
return flecs::entity();
}
# ifdef FLECS_JSON
/** Deserialize entity to JSON.
*
* @memberof flecs::entity
* @ingroup cpp_addons_json
*/
const char* from_json(const char *json) {
return ecs_entity_from_json(m_world, m_id, json, nullptr);
}
# endif
};
} // namespace flecs
/** @} */
/**
* @file addons/cpp/delegate.hpp
* @brief Wrappers around C++ functions that provide callbacks for C APIs.
*/
#pragma once
namespace flecs
{
namespace _
{
// Binding ctx for component hooks
struct component_binding_ctx {
void *on_add = nullptr;
void *on_remove = nullptr;
void *on_set = nullptr;
ecs_ctx_free_t free_on_add = nullptr;
ecs_ctx_free_t free_on_remove = nullptr;
ecs_ctx_free_t free_on_set = nullptr;
~component_binding_ctx() {
if (on_add && free_on_add) {
free_on_add(on_add);
}
if (on_remove && free_on_remove) {
free_on_remove(on_remove);
}
if (on_set && free_on_set) {
free_on_set(on_set);
}
}
};
// Utility to convert template argument pack to array of term ptrs
struct term_ptr {
void *ptr;
bool is_ref;
};
template <typename ... Components>
struct term_ptrs {
using array = flecs::array<_::term_ptr, sizeof...(Components)>;
bool populate(const ecs_iter_t *iter) {
return populate(iter, 0, static_cast<
remove_reference_t<
remove_pointer_t<Components>>
*>(nullptr)...);
}
array m_terms;
private:
/* Populate terms array without checking for references */
bool populate(const ecs_iter_t*, size_t) { return false; }
template <typename T, typename... Targs>
bool populate(const ecs_iter_t *iter, size_t index, T, Targs... comps) {
m_terms[index].ptr = iter->ptrs[index];
bool is_ref = iter->sources && iter->sources[index] != 0;
m_terms[index].is_ref = is_ref;
is_ref |= populate(iter, index + 1, comps ...);
return is_ref;
}
};
struct delegate { };
// Template that figures out from the template parameters of a query/system
// how to pass the value to the each callback
template <typename T, typename = int>
struct each_column { };
// Base class
struct each_column_base {
each_column_base(const _::term_ptr& term, size_t row)
: m_term(term), m_row(row) { }
protected:
const _::term_ptr& m_term;
size_t m_row;
};
// If type is not a pointer, return a reference to the type (default case)
template <typename T>
struct each_column<T, if_t< !is_pointer<T>::value &&
!is_empty<actual_type_t<T>>::value && is_actual<T>::value > >
: each_column_base
{
each_column(const _::term_ptr& term, size_t row)
: each_column_base(term, row) { }
T& get_row() {
return static_cast<T*>(this->m_term.ptr)[this->m_row];
}
};
// If argument type is not the same as actual component type, return by value.
// This requires that the actual type can be converted to the type.
// A typical scenario where this happens is when using flecs::pair types.
template <typename T>
struct each_column<T, if_t< !is_pointer<T>::value &&
!is_empty<actual_type_t<T>>::value && !is_actual<T>::value> >
: each_column_base
{
each_column(const _::term_ptr& term, size_t row)
: each_column_base(term, row) { }
T get_row() {
return static_cast<actual_type_t<T>*>(this->m_term.ptr)[this->m_row];
}
};
// If type is empty (indicating a tag) the query will pass a nullptr. To avoid
// returning nullptr to reference arguments, return a temporary value.
template <typename T>
struct each_column<T, if_t< is_empty<actual_type_t<T>>::value &&
!is_pointer<T>::value > >
: each_column_base
{
each_column(const _::term_ptr& term, size_t row)
: each_column_base(term, row) { }
T get_row() {
return actual_type_t<T>();
}
};
// If type is a pointer (indicating an optional value) return the type as is
template <typename T>
struct each_column<T, if_t< is_pointer<T>::value &&
!is_empty<actual_type_t<T>>::value > >
: each_column_base
{
each_column(const _::term_ptr& term, size_t row)
: each_column_base(term, row) { }
actual_type_t<T> get_row() {
if (this->m_term.ptr) {
return &static_cast<actual_type_t<T>>(this->m_term.ptr)[this->m_row];
} else {
// optional argument doesn't have a value
return nullptr;
}
}
};
// If the query contains component references to other entities, check if the
// current argument is one.
template <typename T, typename = int>
struct each_ref_column : public each_column<T> {
each_ref_column(const _::term_ptr& term, size_t row)
: each_column<T>(term, row) {
if (term.is_ref) {
// If this is a reference, set the row to 0 as a ref always is a
// single value, not an array. This prevents the application from
// having to do an if-check on whether the column is owned.
//
// This check only happens when the current table being iterated
// over caused the query to match a reference. The check is
// performed once per iterated table.
this->m_row = 0;
}
}
};
template <typename Func, typename ... Components>
struct each_delegate : public delegate {
// If the number of arguments in the function signature is one more than the
// number of components in the query, an extra entity arg is required.
static constexpr bool PassEntity =
(sizeof...(Components) + 1) == (arity<Func>::value);
// If the number of arguments in the function is two more than the number of
// components in the query, extra iter + index arguments are required.
static constexpr bool PassIter =
(sizeof...(Components) + 2) == (arity<Func>::value);
static_assert(arity<Func>::value > 0,
"each() must have at least one argument");
using Terms = typename term_ptrs<Components ...>::array;
template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
explicit each_delegate(Func&& func) noexcept
: m_func(FLECS_MOV(func)) { }
explicit each_delegate(const Func& func) noexcept
: m_func(func) { }
// Invoke object directly. This operation is useful when the calling
// function has just constructed the delegate, such as what happens when
// iterating a query.
void invoke(ecs_iter_t *iter) const {
term_ptrs<Components...> terms;
if (terms.populate(iter)) {
invoke_callback< each_ref_column >(iter, m_func, 0, terms.m_terms);
} else {
invoke_callback< each_column >(iter, m_func, 0, terms.m_terms);
}
}
// Static function that can be used as callback for systems/triggers
static void run(ecs_iter_t *iter) {
auto self = static_cast<const each_delegate*>(iter->binding_ctx);
ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
self->invoke(iter);
}
// Create instance of delegate
static each_delegate* make(const Func& func) {
return FLECS_NEW(each_delegate)(func);
}
// Function that can be used as callback to free delegate
static void free(void *obj) {
_::free_obj<each_delegate>(static_cast<each_delegate*>(obj));
}
// Static function to call for component on_add hook
static void run_add(ecs_iter_t *iter) {
component_binding_ctx *ctx = reinterpret_cast<component_binding_ctx*>(
iter->binding_ctx);
iter->binding_ctx = ctx->on_add;
run(iter);
}
// Static function to call for component on_remove hook
static void run_remove(ecs_iter_t *iter) {
component_binding_ctx *ctx = reinterpret_cast<component_binding_ctx*>(
iter->binding_ctx);
iter->binding_ctx = ctx->on_remove;
run(iter);
}
// Static function to call for component on_set hook
static void run_set(ecs_iter_t *iter) {
component_binding_ctx *ctx = reinterpret_cast<component_binding_ctx*>(
iter->binding_ctx);
iter->binding_ctx = ctx->on_set;
run(iter);
}
// Each delegates always use instanced iterators
static bool instanced() {
return true;
}
private:
// Number of function arguments is one more than number of components, pass
// entity as argument.
template <template<typename X, typename = int> class ColumnType,
typename... Args, if_t<
sizeof...(Components) == sizeof...(Args) && PassEntity> = 0>
static void invoke_callback(
ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
{
ECS_TABLE_LOCK(iter->world, iter->table);
ecs_world_t *world = iter->world;
size_t count = static_cast<size_t>(iter->count);
ecs_assert(count > 0, ECS_INVALID_OPERATION,
"no entities returned, use each() without flecs::entity argument");
for (size_t i = 0; i < count; i ++) {
func(flecs::entity(world, iter->entities[i]),
(ColumnType< remove_reference_t<Components> >(comps, i)
.get_row())...);
}
ECS_TABLE_UNLOCK(iter->world, iter->table);
}
// Number of function arguments is two more than number of components, pass
// iter + index as argument.
template <template<typename X, typename = int> class ColumnType,
typename... Args, int Enabled = PassIter, if_t<
sizeof...(Components) == sizeof...(Args) && Enabled> = 0>
static void invoke_callback(
ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
{
size_t count = static_cast<size_t>(iter->count);
if (count == 0) {
// If query has no This terms, count can be 0. Since each does not
// have an entity parameter, just pass through components
count = 1;
}
flecs::iter it(iter);
ECS_TABLE_LOCK(iter->world, iter->table);
for (size_t i = 0; i < count; i ++) {
func(it, i, (ColumnType< remove_reference_t<Components> >(comps, i)
.get_row())...);
}
ECS_TABLE_UNLOCK(iter->world, iter->table);
}
// Number of function arguments is equal to number of components, no entity
template <template<typename X, typename = int> class ColumnType,
typename... Args, if_t<
sizeof...(Components) == sizeof...(Args) && !PassEntity && !PassIter> = 0>
static void invoke_callback(
ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
{
size_t count = static_cast<size_t>(iter->count);
if (count == 0) {
// If query has no This terms, count can be 0. Since each does not
// have an entity parameter, just pass through components
count = 1;
}
flecs::iter it(iter);
ECS_TABLE_LOCK(iter->world, iter->table);
for (size_t i = 0; i < count; i ++) {
func( (ColumnType< remove_reference_t<Components> >(comps, i)
.get_row())...);
}
ECS_TABLE_UNLOCK(iter->world, iter->table);
}
template <template<typename X, typename = int> class ColumnType,
typename... Args, if_t< sizeof...(Components) != sizeof...(Args) > = 0>
static void invoke_callback(ecs_iter_t *iter, const Func& func,
size_t index, Terms& columns, Args... comps)
{
invoke_callback<ColumnType>(
iter, func, index + 1, columns, comps..., columns[index]);
}
Func m_func;
};
template <typename Func, typename ... Components>
struct find_delegate : public delegate {
// If the number of arguments in the function signature is one more than the
// number of components in the query, an extra entity arg is required.
static constexpr bool PassEntity =
(sizeof...(Components) + 1) == (arity<Func>::value);
// If the number of arguments in the function is two more than the number of
// components in the query, extra iter + index arguments are required.
static constexpr bool PassIter =
(sizeof...(Components) + 2) == (arity<Func>::value);
static_assert(arity<Func>::value > 0,
"each() must have at least one argument");
using Terms = typename term_ptrs<Components ...>::array;
template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
explicit find_delegate(Func&& func) noexcept
: m_func(FLECS_MOV(func)) { }
explicit find_delegate(const Func& func) noexcept
: m_func(func) { }
// Invoke object directly. This operation is useful when the calling
// function has just constructed the delegate, such as what happens when
// iterating a query.
flecs::entity invoke(ecs_iter_t *iter) const {
term_ptrs<Components...> terms;
if (terms.populate(iter)) {
return invoke_callback< each_ref_column >(iter, m_func, 0, terms.m_terms);
} else {
return invoke_callback< each_column >(iter, m_func, 0, terms.m_terms);
}
}
// Find delegates always use instanced iterators
static bool instanced() {
return true;
}
private:
// Number of function arguments is one more than number of components, pass
// entity as argument.
template <template<typename X, typename = int> class ColumnType,
typename... Args, if_t<
sizeof...(Components) == sizeof...(Args) && PassEntity> = 0>
static flecs::entity invoke_callback(
ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
{
ECS_TABLE_LOCK(iter->world, iter->table);
ecs_world_t *world = iter->world;
size_t count = static_cast<size_t>(iter->count);
flecs::entity result;
ecs_assert(count > 0, ECS_INVALID_OPERATION,
"no entities returned, use find() without flecs::entity argument");
for (size_t i = 0; i < count; i ++) {
if (func(flecs::entity(world, iter->entities[i]),
(ColumnType< remove_reference_t<Components> >(comps, i)
.get_row())...))
{
result = flecs::entity(world, iter->entities[i]);
break;
}
}
ECS_TABLE_UNLOCK(iter->world, iter->table);
return result;
}
// Number of function arguments is two more than number of components, pass
// iter + index as argument.
template <template<typename X, typename = int> class ColumnType,
typename... Args, int Enabled = PassIter, if_t<
sizeof...(Components) == sizeof...(Args) && Enabled> = 0>
static flecs::entity invoke_callback(
ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
{
size_t count = static_cast<size_t>(iter->count);
if (count == 0) {
// If query has no This terms, count can be 0. Since each does not
// have an entity parameter, just pass through components
count = 1;
}
flecs::iter it(iter);
flecs::entity result;
ECS_TABLE_LOCK(iter->world, iter->table);
for (size_t i = 0; i < count; i ++) {
if (func(it, i, (ColumnType< remove_reference_t<Components> >(comps, i)
.get_row())...))
{
result = flecs::entity(iter->world, iter->entities[i]);
break;
}
}
ECS_TABLE_UNLOCK(iter->world, iter->table);
return result;
}
// Number of function arguments is equal to number of components, no entity
template <template<typename X, typename = int> class ColumnType,
typename... Args, if_t<
sizeof...(Components) == sizeof...(Args) && !PassEntity && !PassIter> = 0>
static flecs::entity invoke_callback(
ecs_iter_t *iter, const Func& func, size_t, Terms&, Args... comps)
{
size_t count = static_cast<size_t>(iter->count);
if (count == 0) {
// If query has no This terms, count can be 0. Since each does not
// have an entity parameter, just pass through components
count = 1;
}
flecs::iter it(iter);
flecs::entity result;
ECS_TABLE_LOCK(iter->world, iter->table);
for (size_t i = 0; i < count; i ++) {
if (func( (ColumnType< remove_reference_t<Components> >(comps, i)
.get_row())...))
{
result = flecs::entity(iter->world, iter->entities[i]);
break;
}
}
ECS_TABLE_UNLOCK(iter->world, iter->table);
return result;
}
template <template<typename X, typename = int> class ColumnType,
typename... Args, if_t< sizeof...(Components) != sizeof...(Args) > = 0>
static flecs::entity invoke_callback(ecs_iter_t *iter, const Func& func,
size_t index, Terms& columns, Args... comps)
{
return invoke_callback<ColumnType>(
iter, func, index + 1, columns, comps..., columns[index]);
}
Func m_func;
};
////////////////////////////////////////////////////////////////////////////////
//// Utility class to invoke a system iterate action
////////////////////////////////////////////////////////////////////////////////
template <typename Func, typename ... Components>
struct iter_delegate : delegate {
private:
static constexpr bool IterOnly = arity<Func>::value == 1;
using Terms = typename term_ptrs<Components ...>::array;
public:
template < if_not_t< is_same< decay_t<Func>, decay_t<Func>& >::value > = 0>
explicit iter_delegate(Func&& func) noexcept
: m_func(FLECS_MOV(func)) { }
explicit iter_delegate(const Func& func) noexcept
: m_func(func) { }
// Invoke object directly. This operation is useful when the calling
// function has just constructed the delegate, such as what happens when
// iterating a query.
void invoke(ecs_iter_t *iter) const {
term_ptrs<Components...> terms;
terms.populate(iter);
invoke_callback(iter, m_func, 0, terms.m_terms);
}
// Static function that can be used as callback for systems/triggers
static void run(ecs_iter_t *iter) {
auto self = static_cast<const iter_delegate*>(iter->binding_ctx);
ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
self->invoke(iter);
}
// Instancing needs to be enabled explicitly for iter delegates
static bool instanced() {
return false;
}
private:
template <typename... Args, if_t<!sizeof...(Args) && IterOnly> = 0>
static void invoke_callback(ecs_iter_t *iter, const Func& func,
size_t, Terms&, Args...)
{
flecs::iter it(iter);
ECS_TABLE_LOCK(iter->world, iter->table);
func(it);
ECS_TABLE_UNLOCK(iter->world, iter->table);
}
template <typename... Targs, if_t<!IterOnly &&
(sizeof...(Targs) == sizeof...(Components))> = 0>
static void invoke_callback(ecs_iter_t *iter, const Func& func, size_t,
Terms&, Targs... comps)
{
flecs::iter it(iter);
ECS_TABLE_LOCK(iter->world, iter->table);
func(it, ( static_cast<
remove_reference_t<
remove_pointer_t<
actual_type_t<Components> > >* >
(comps.ptr))...);
ECS_TABLE_UNLOCK(iter->world, iter->table);
}
template <typename... Targs, if_t<!IterOnly &&
(sizeof...(Targs) != sizeof...(Components)) > = 0>
static void invoke_callback(ecs_iter_t *iter, const Func& func,
size_t index, Terms& columns, Targs... comps)
{
invoke_callback(iter, func, index + 1, columns, comps...,
columns[index]);
}
Func m_func;
};
////////////////////////////////////////////////////////////////////////////////
//// Utility class to invoke an entity observer delegate
////////////////////////////////////////////////////////////////////////////////
template <typename Func>
struct entity_observer_delegate : delegate {
explicit entity_observer_delegate(Func&& func) noexcept
: m_func(FLECS_MOV(func)) { }
// Static function that can be used as callback for systems/triggers
static void run(ecs_iter_t *iter) {
invoke<Func>(iter);
}
private:
template <typename F, if_t<arity<F>::value == 1> = 0>
static void invoke(ecs_iter_t *iter) {
auto self = static_cast<const entity_observer_delegate*>(iter->binding_ctx);
ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
self->m_func(flecs::entity(iter->world, ecs_field_src(iter, 1)));
}
template <typename F, if_t<arity<F>::value == 0> = 0>
static void invoke(ecs_iter_t *iter) {
auto self = static_cast<const entity_observer_delegate*>(iter->binding_ctx);
ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
self->m_func();
}
Func m_func;
};
template <typename Func, typename Event>
struct entity_payload_observer_delegate : delegate {
explicit entity_payload_observer_delegate(Func&& func) noexcept
: m_func(FLECS_MOV(func)) { }
// Static function that can be used as callback for systems/triggers
static void run(ecs_iter_t *iter) {
invoke<Func>(iter);
}
private:
template <typename F, if_t<arity<F>::value == 1> = 0>
static void invoke(ecs_iter_t *iter) {
auto self = static_cast<const entity_payload_observer_delegate*>(
iter->binding_ctx);
ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION,
"entity observer invoked without payload");
Event *data = static_cast<Event*>(iter->param);
self->m_func(*data);
}
template <typename F, if_t<arity<F>::value == 2> = 0>
static void invoke(ecs_iter_t *iter) {
auto self = static_cast<const entity_payload_observer_delegate*>(
iter->binding_ctx);
ecs_assert(self != nullptr, ECS_INTERNAL_ERROR, NULL);
ecs_assert(iter->param != nullptr, ECS_INVALID_OPERATION,
"entity observer invoked without payload");
Event *data = static_cast<Event*>(iter->param);
self->m_func(flecs::entity(iter->world, ecs_field_src(iter, 1)), *data);
}
Func m_func;
};
////////////////////////////////////////////////////////////////////////////////
//// Utility to invoke callback on entity if it has components in signature
////////////////////////////////////////////////////////////////////////////////
template<typename ... Args>
struct entity_with_delegate_impl;
template<typename ... Args>
struct entity_with_delegate_impl<arg_list<Args ...>> {
using ColumnArray = flecs::array<int32_t, sizeof...(Args)>;
using ArrayType = flecs::array<void*, sizeof...(Args)>;
using DummyArray = flecs::array<int, sizeof...(Args)>;
using IdArray = flecs::array<id_t, sizeof...(Args)>;
static bool const_args() {
static flecs::array<bool, sizeof...(Args)> is_const_args ({
flecs::is_const<flecs::remove_reference_t<Args>>::value...
});
for (auto is_const : is_const_args) {
if (!is_const) {
return false;
}
}
return true;
}
static
bool get_ptrs(world_t *world, const ecs_record_t *r, ecs_table_t *table,
ArrayType& ptrs)
{
ecs_assert(table != NULL, ECS_INTERNAL_ERROR, NULL);
if (!ecs_table_column_count(table)) {
return false;
}
/* table_index_of needs real world */
const flecs::world_t *real_world = ecs_get_world(world);
/* Get column indices for components */
ColumnArray columns ({
ecs_table_get_column_index(real_world, table,
_::cpp_type<Args>().id(world))...
});
/* Get pointers for columns for entity */
size_t i = 0;
for (int32_t column : columns) {
if (column == -1) {
return false;
}
ptrs[i ++] = ecs_record_get_column(r, column, 0);
}
return true;
}
static bool get_mut_ptrs(world_t *world, ecs_entity_t e, ArrayType& ptrs) {
/* Get pointers w/get_mut */
size_t i = 0;
DummyArray dummy ({
(ptrs[i ++] = ecs_get_mut_id(world, e,
_::cpp_type<Args>().id(world)), 0)...
});
return true;
}
template <typename Func>
static bool invoke_read(world_t *world, entity_t e, const Func& func) {
const ecs_record_t *r = ecs_read_begin(world, e);
if (!r) {
return false;
}
ecs_table_t *table = r->table;
if (!table) {
return false;
}
ArrayType ptrs;
bool has_components = get_ptrs(world, r, table, ptrs);
if (has_components) {
invoke_callback(func, 0, ptrs);
}
ecs_read_end(r);
return has_components;
}
template <typename Func>
static bool invoke_write(world_t *world, entity_t e, const Func& func) {
ecs_record_t *r = ecs_write_begin(world, e);
if (!r) {
return false;
}
ecs_table_t *table = r->table;
if (!table) {
return false;
}
ArrayType ptrs;
bool has_components = get_ptrs(world, r, table, ptrs);
if (has_components) {
invoke_callback(func, 0, ptrs);
}
ecs_write_end(r);
return has_components;
}
template <typename Func>
static bool invoke_get(world_t *world, entity_t e, const Func& func) {
if (const_args()) {
return invoke_read(world, e, func);
} else {
return invoke_write(world, e, func);
}
}
// Utility for storing id in array in pack expansion
static size_t store_added(IdArray& added, size_t elem, ecs_table_t *prev,
ecs_table_t *next, id_t id)
{
// Array should only contain ids for components that are actually added,
// so check if the prev and next tables are different.
if (prev != next) {
added[elem] = id;
elem ++;
}
return elem;
}
template <typename Func>
static bool invoke_get_mut(world_t *world, entity_t id, const Func& func) {
flecs::world w(world);
ArrayType ptrs;
ecs_table_t *table = NULL;
// When not deferred take the fast path.
if (!w.is_deferred()) {
// Bit of low level code so we only do at most one table move & one
// entity lookup for the entire operation.
// Make sure the object is not a stage. Operations on a stage are
// only allowed when the stage is in deferred mode, which is when
// the world is in readonly mode.
ecs_assert(!w.is_stage(), ECS_INVALID_PARAMETER, NULL);
// Find table for entity
ecs_record_t *r = ecs_record_find(world, id);
if (r) {
table = r->table;
}
// Find destination table that has all components
ecs_table_t *prev = table, *next;
size_t elem = 0;
IdArray added;
// Iterate components, only store added component ids in added array
DummyArray dummy_before ({ (
next = ecs_table_add_id(world, prev, w.id<Args>()),
elem = store_added(added, elem, prev, next, w.id<Args>()),
prev = next, 0
)... });
(void)dummy_before;
// If table is different, move entity straight to it
if (table != next) {
ecs_type_t ids;
ids.array = added.ptr();
ids.count = static_cast<ecs_size_t>(elem);
ecs_commit(world, id, r, next, &ids, NULL);
table = next;
}
if (!get_ptrs(w, r, table, ptrs)) {
ecs_abort(ECS_INTERNAL_ERROR, NULL);
}
ECS_TABLE_LOCK(world, table);
// When deferred, obtain pointers with regular get_mut
} else {
get_mut_ptrs(world, id, ptrs);
}
invoke_callback(func, 0, ptrs);
if (!w.is_deferred()) {
ECS_TABLE_UNLOCK(world, table);
}
// Call modified on each component
DummyArray dummy_after ({
( ecs_modified_id(world, id, w.id<Args>()), 0)...
});
(void)dummy_after;
return true;
}
private:
template <typename Func, typename ... TArgs,
if_t<sizeof...(TArgs) == sizeof...(Args)> = 0>
static void invoke_callback(
const Func& f, size_t, ArrayType&, TArgs&& ... comps)
{
f(*static_cast<typename base_arg_type<Args>::type*>(comps)...);
}
template <typename Func, typename ... TArgs,
if_t<sizeof...(TArgs) != sizeof...(Args)> = 0>
static void invoke_callback(const Func& f, size_t arg, ArrayType& ptrs,
TArgs&& ... comps)
{
invoke_callback(f, arg + 1, ptrs, comps..., ptrs[arg]);
}
};
template <typename Func, typename U = int>
struct entity_with_delegate {
static_assert(function_traits<Func>::value, "type is not callable");
};
template <typename Func>
struct entity_with_delegate<Func, if_t< is_callable<Func>::value > >
: entity_with_delegate_impl< arg_list_t<Func> >
{
static_assert(function_traits<Func>::arity > 0,
"function must have at least one argument");
};
} // namespace _
// Experimental: allows using the each delegate for use cases outside of flecs
template <typename Func, typename ... Args>
using delegate = _::each_delegate<typename std::decay<Func>::type, Args...>;
} // namespace flecs
/**
* @file addons/cpp/utils/iterable.hpp
* @brief Base class for iterable objects, like queries.
*/
namespace flecs {
template <typename ... Components>
struct iter_iterable;
template <typename ... Components>
struct page_iterable;
template <typename ... Components>
struct worker_iterable;
template <typename ... Components>
struct iterable {
/** Each iterator.
* The "each" iterator accepts a function that is invoked for each matching
* entity. The following function signatures are valid:
* - func(flecs::entity e, Components& ...)
* - func(flecs::iter& it, size_t index, Components& ....)
* - func(Components& ...)
*
* Each iterators are automatically instanced.
*/
template <typename Func>
void each(Func&& func) const {
each(nullptr, FLECS_FWD(func));
}
template <typename Func>
void each(flecs::world_t *world, Func&& func) const {
iterate<_::each_delegate>(world, FLECS_FWD(func),
this->next_each_action());
}
template <typename Func>
void each(flecs::iter& it, Func&& func) const {
iterate<_::each_delegate>(it.world(), FLECS_FWD(func),
this->next_each_action());
}
template <typename Func>
void each(flecs::entity e, Func&& func) const {
iterate<_::each_delegate>(e.world(), FLECS_FWD(func),
this->next_each_action());
}
template <typename Func>
flecs::entity find(Func&& func) const {
return iterate_find<_::find_delegate>(nullptr, FLECS_FWD(func),
this->next_each_action());
}
/** Iter iterator.
* The "iter" iterator accepts a function that is invoked for each matching
* table. The following function signatures are valid:
* - func(flecs::iter& it, Components* ...)
* - func(Components& ...)
*
* Iter iterators are not automatically instanced. When a result contains
* shared components, entities of the result will be iterated one by one.
* This ensures that applications can't accidentally read out of bounds by
* accessing a shared component as an array.
*/
template <typename Func>
void iter(Func&& func) const {
iterate<_::iter_delegate>(nullptr, FLECS_FWD(func),
this->next_action());
}
template <typename Func>
void iter(flecs::world_t *world, Func&& func) const {
iterate<_::iter_delegate>(world, FLECS_FWD(func),
this->next_action());
}
template <typename Func>
void iter(flecs::iter& it, Func&& func) const {
iterate<_::iter_delegate>(it.world(), FLECS_FWD(func),
this->next_action());
}
template <typename Func>
void iter(flecs::entity e, Func&& func) const {
iterate<_::iter_delegate>(e.world(), FLECS_FWD(func),
this->next_action());
}
/** Create iterator.
* Create an iterator object that can be modified before iterating.
*/
iter_iterable<Components...> iter(flecs::world_t *world = nullptr) const;
/** Page iterator.
* Create an iterator that limits the returned entities with offset/limit.
*
* @param offset How many entities to skip.
* @param limit The maximum number of entities to return.
* @return Iterable that can be iterated with each/iter.
*/
page_iterable<Components...> page(int32_t offset, int32_t limit);
/** Worker iterator.
* Create an iterator that divides the number of matched entities across
* a number of resources.
*
* @param index The index of the current resource.
* @param count The total number of resources to divide entities between.
* @return Iterable that can be iterated with each/iter.
*/
worker_iterable<Components...> worker(int32_t index, int32_t count);
/** Return number of entities matched by iterable. */
int32_t count() const {
return this->iter().count();
}
/** Return whether iterable has any matches. */
bool is_true() const {
return this->iter().is_true();
}
/** Return first entity matched by iterable. */
flecs::entity first() const {
return this->iter().first();
}
virtual ~iterable() { }
protected:
friend iter_iterable<Components...>;
friend page_iterable<Components...>;
friend worker_iterable<Components...>;
virtual ecs_iter_t get_iter(flecs::world_t *stage) const = 0;
virtual ecs_iter_next_action_t next_action() const = 0;
virtual ecs_iter_next_action_t next_each_action() const = 0;
template < template<typename Func, typename ... Comps> class Delegate, typename Func, typename NextFunc, typename ... Args>
void iterate(flecs::world_t *stage, Func&& func, NextFunc next, Args &&... args) const {
ecs_iter_t it = this->get_iter(stage);
if (Delegate<Func, Components...>::instanced()) {
ECS_BIT_SET(it.flags, EcsIterIsInstanced);
}
while (next(&it, FLECS_FWD(args)...)) {
Delegate<Func, Components...>(func).invoke(&it);
}
}
template < template<typename Func, typename ... Comps> class Delegate, typename Func, typename NextFunc, typename ... Args>
flecs::entity iterate_find(flecs::world_t *stage, Func&& func, NextFunc next, Args &&... args) const {
ecs_iter_t it = this->get_iter(stage);
if (Delegate<Func, Components...>::instanced()) {
ECS_BIT_SET(it.flags, EcsIterIsInstanced);
}
flecs::entity result;
while (!result && next(&it, FLECS_FWD(args)...)) {
result = Delegate<Func, Components...>(func).invoke(&it);
}
if (result) {
ecs_iter_fini(&it);
}
return result;
}
};
template <typename ... Components>
struct iter_iterable final : iterable<Components...> {
template <typename Iterable>
iter_iterable(Iterable *it, flecs::world_t *world)
{
m_it = it->get_iter(world);
m_next = it->next_action();
m_next_each = it->next_action();
}
iter_iterable<Components...>& set_var(int var_id, flecs::entity_t value) {
ecs_assert(var_id != -1, ECS_INVALID_PARAMETER, 0);
ecs_iter_set_var(&m_it, var_id, value);
return *this;
}
# ifdef FLECS_RULES
/**
* @file addons/cpp/mixins/rule/iterable.inl
* @brief Rule iterable mixin.
*/
/**
* @memberof flecs::iter
* @ingroup cpp_addons_rules
*
* @{
*/
iter_iterable<Components...>& set_var(const char *name, flecs::entity_t value) {
ecs_rule_iter_t *rit = &m_it.priv.iter.rule;
int var_id = ecs_rule_find_var(rit->rule, name);
ecs_assert(var_id != -1, ECS_INVALID_PARAMETER, name);
ecs_iter_set_var(&m_it, var_id, value);
return *this;
}
/** @} */
# endif
# ifdef FLECS_JSON
/**
* @file addons/cpp/mixins/json/iterable.inl
* @brief JSON iterable mixin.
*/
/** Serialize iterator result to JSON.
*
* @memberof flecs::iter
* @ingroup cpp_addons_json
*/
flecs::string to_json(flecs::iter_to_json_desc_t *desc = nullptr) {
char *json = ecs_iter_to_json(m_it.real_world, &m_it, desc);
return flecs::string(json);
}
# endif
// Return total number of entities in result.
int32_t count() {
int32_t result = 0;
while (m_next_each(&m_it)) {
result += m_it.count;
}
return result;
}
// Returns true if iterator yields at least once result.
bool is_true() {
bool result = m_next_each(&m_it);
if (result) {
ecs_iter_fini(&m_it);
}
return result;
}
// Return first matching entity.
flecs::entity first() {
flecs::entity result;
if (m_next_each(&m_it) && m_it.count) {
result = flecs::entity(m_it.world, m_it.entities[0]);
ecs_iter_fini(&m_it);
}
return result;
}
// Limit results to tables with specified group id (grouped queries only)
iter_iterable<Components...>& set_group(uint64_t group_id) {
ecs_query_set_group(&m_it, group_id);
return *this;
}
// Limit results to tables with specified group id (grouped queries only)
template <typename Group>
iter_iterable<Components...>& set_group() {
ecs_query_set_group(&m_it, _::cpp_type<Group>().id(m_it.real_world));
return *this;
}
protected:
ecs_iter_t get_iter(flecs::world_t *world) const {
if (world) {
ecs_iter_t result = m_it;
result.world = world;
return result;
}
return m_it;
}
ecs_iter_next_action_t next_action() const {
return m_next;
}
ecs_iter_next_action_t next_each_action() const {
return m_next_each;
}
private:
ecs_iter_t m_it;
ecs_iter_next_action_t m_next;
ecs_iter_next_action_t m_next_each;
};
template <typename ... Components>
iter_iterable<Components...> iterable<Components...>::iter(flecs::world_t *world) const
{
return iter_iterable<Components...>(this, world);
}
template <typename ... Components>
struct page_iterable final : iterable<Components...> {
template <typename Iterable>
page_iterable(int32_t offset, int32_t limit, Iterable *it)
: m_offset(offset)
, m_limit(limit)
{
m_chain_it = it->get_iter(nullptr);
}
protected:
ecs_iter_t get_iter(flecs::world_t*) const {
return ecs_page_iter(&m_chain_it, m_offset, m_limit);
}
ecs_iter_next_action_t next_action() const {
return ecs_page_next;
}
ecs_iter_next_action_t next_each_action() const {
return ecs_page_next;
}
private:
ecs_iter_t m_chain_it;
int32_t m_offset;
int32_t m_limit;
};
template <typename ... Components>
page_iterable<Components...> iterable<Components...>::page(
int32_t offset,
int32_t limit)
{
return page_iterable<Components...>(offset, limit, this);
}
template <typename ... Components>
struct worker_iterable final : iterable<Components...> {
worker_iterable(int32_t offset, int32_t limit, iterable<Components...> *it)
: m_offset(offset)
, m_limit(limit)
{
m_chain_it = it->get_iter(nullptr);
}
protected:
ecs_iter_t get_iter(flecs::world_t*) const {
return ecs_worker_iter(&m_chain_it, m_offset, m_limit);
}
ecs_iter_next_action_t next_action() const {
return ecs_worker_next;
}
ecs_iter_next_action_t next_each_action() const {
return ecs_worker_next;
}
private:
ecs_iter_t m_chain_it;
int32_t m_offset;
int32_t m_limit;
};
template <typename ... Components>
worker_iterable<Components...> iterable<Components...>::worker(
int32_t index,
int32_t count)
{
return worker_iterable<Components...>(index, count, this);
}
}
/**
* @file addons/cpp/component.hpp
* @brief Registering/obtaining info from components.
*/
#pragma once
#include <ctype.h>
#include <stdio.h>
/**
* @defgroup cpp_components Components
* @ingroup cpp_core
* Registering and working with components.
*
* @{
*/
namespace flecs {
namespace _ {
// Trick to obtain typename from type, as described here
// https://blog.molecular-matters.com/2015/12/11/getting-the-type-of-a-template-argument-as-string-without-rtti/
//
// The code from the link has been modified to work with more types, and across
// multiple compilers. The resulting string should be the same on all platforms
// for all compilers.
//
#if defined(__GNUC__) || defined(_WIN32)
template <typename T>
inline static const char* type_name() {
static const size_t len = ECS_FUNC_TYPE_LEN(const char*, type_name, ECS_FUNC_NAME);
static char result[len + 1] = {};
static const size_t front_len = ECS_FUNC_NAME_FRONT(const char*, type_name);
return ecs_cpp_get_type_name(result, ECS_FUNC_NAME, len, front_len);
}
#else
#error "implicit component registration not supported"
#endif
// Translate a typename into a language-agnostic identifier. This allows for
// registration of components/modules across language boundaries.
template <typename T>
inline static const char* symbol_name() {
static const size_t len = ECS_FUNC_TYPE_LEN(const char*, symbol_name, ECS_FUNC_NAME);
static char result[len + 1] = {};
return ecs_cpp_get_symbol_name(result, type_name<T>(), len);
}
template <> inline const char* symbol_name<uint8_t>() {
return "u8";
}
template <> inline const char* symbol_name<uint16_t>() {
return "u16";
}
template <> inline const char* symbol_name<uint32_t>() {
return "u32";
}
template <> inline const char* symbol_name<uint64_t>() {
return "u64";
}
template <> inline const char* symbol_name<int8_t>() {
return "i8";
}
template <> inline const char* symbol_name<int16_t>() {
return "i16";
}
template <> inline const char* symbol_name<int32_t>() {
return "i32";
}
template <> inline const char* symbol_name<int64_t>() {
return "i64";
}
template <> inline const char* symbol_name<float>() {
return "f32";
}
template <> inline const char* symbol_name<double>() {
return "f64";
}
// If type is trivial, don't register lifecycle actions. While the functions
// that obtain the lifecycle callback do detect whether the callback is required
// adding a special case for trivial types eases the burden a bit on the
// compiler as it reduces the number of templates to evaluate.
template<typename T, enable_if_t<
std::is_trivial<T>::value == true
>* = nullptr>
void register_lifecycle_actions(ecs_world_t*, ecs_entity_t) { }
// If the component is non-trivial, register component lifecycle actions.
// Depending on the type not all callbacks may be available.
template<typename T, enable_if_t<
std::is_trivial<T>::value == false
>* = nullptr>
void register_lifecycle_actions(
ecs_world_t *world,
ecs_entity_t component)
{
ecs_type_hooks_t cl{};
cl.ctor = ctor<T>();
cl.dtor = dtor<T>();
cl.copy = copy<T>();
cl.copy_ctor = copy_ctor<T>();
cl.move = move<T>();
cl.move_ctor = move_ctor<T>();
cl.ctor_move_dtor = ctor_move_dtor<T>();
cl.move_dtor = move_dtor<T>();
ecs_set_hooks_id( world, component, &cl);
}
// Class that manages component ids across worlds & binaries.
// The cpp_type class stores the component id for a C++ type in a static global
// variable that is shared between worlds. Whenever a component is used this
// class will check if it already has been registered (has the global id been
// set), and if not, register the component with the world.
//
// If the id has been set, the class will ensure it is known by the world. If it
// is not known the component has been registered by another world and will be
// registered with the world using the same id. If the id does exist, the class
// will register it as a component, and verify whether the input is consistent.
template <typename T>
struct cpp_type_impl {
// Initialize component identifier
static void init(
entity_t entity,
bool allow_tag = true)
{
if (s_reset_count != ecs_cpp_reset_count_get()) {
reset();
}
// If an identifier was already set, check for consistency
if (s_id) {
ecs_assert(s_id == entity, ECS_INCONSISTENT_COMPONENT_ID,
type_name<T>());
ecs_assert(allow_tag == s_allow_tag, ECS_INVALID_PARAMETER, NULL);
// Component was already registered and data is consistent with new
// identifier, so nothing else to be done.
return;
}
// Component wasn't registered yet, set the values. Register component
// name as the fully qualified flecs path.
s_id = entity;
s_allow_tag = allow_tag;
s_size = sizeof(T);
s_alignment = alignof(T);
if (is_empty<T>::value && allow_tag) {
s_size = 0;
s_alignment = 0;
}
s_reset_count = ecs_cpp_reset_count_get();
}
// Obtain a component identifier for explicit component registration.
static entity_t id_explicit(world_t *world = nullptr,
const char *name = nullptr, bool allow_tag = true, flecs::id_t id = 0,
bool is_component = true, bool *existing = nullptr)
{
if (!s_id) {
// If no world was provided the component cannot be registered
ecs_assert(world != nullptr, ECS_COMPONENT_NOT_REGISTERED, name);
} else {
ecs_assert(!id || s_id == id, ECS_INCONSISTENT_COMPONENT_ID, NULL);
}
// If no id has been registered yet for the component (indicating the
// component has not yet been registered, or the component is used
// across more than one binary), or if the id does not exists in the
// world (indicating a multi-world application), register it.
if (!s_id || (world && !ecs_exists(world, s_id))) {
init(s_id ? s_id : id, allow_tag);
ecs_assert(!id || s_id == id, ECS_INTERNAL_ERROR, NULL);
const char *symbol = nullptr;
if (id) {
symbol = ecs_get_symbol(world, id);
}
if (!symbol) {
symbol = symbol_name<T>();
}
entity_t entity = ecs_cpp_component_register_explicit(
world, s_id, id, name, type_name<T>(), symbol,
s_size, s_alignment, is_component, existing);
s_id = entity;
// If component is enum type, register constants
#if FLECS_CPP_ENUM_REFLECTION_SUPPORT
_::init_enum<T>(world, entity);
#endif
}
// By now the identifier must be valid and known with the world.
ecs_assert(s_id != 0 && ecs_exists(world, s_id),
ECS_INTERNAL_ERROR, NULL);
return s_id;
}
// Obtain a component identifier for implicit component registration. This
// is almost the same as id_explicit, except that this operation
// automatically registers lifecycle callbacks.
// Additionally, implicit registration temporarily resets the scope & with
// state of the world, so that the component is not implicitly created with
// the scope/with of the code it happens to be first used by.
static id_t id(world_t *world = nullptr, const char *name = nullptr,
bool allow_tag = true)
{
// If no id has been registered yet, do it now.
#ifndef FLECS_CPP_NO_AUTO_REGISTRATION
if (!registered(world)) {
ecs_entity_t prev_scope = 0;
ecs_id_t prev_with = 0;
if (world) {
prev_scope = ecs_set_scope(world, 0);
prev_with = ecs_set_with(world, 0);
}
// This will register a component id, but will not register
// lifecycle callbacks.
bool existing;
id_explicit(world, name, allow_tag, 0, true, &existing);
// Register lifecycle callbacks, but only if the component has a
// size. Components that don't have a size are tags, and tags don't
// require construction/destruction/copy/move's.
if (size() && !existing) {
register_lifecycle_actions<T>(world, s_id);
}
if (prev_with) {
ecs_set_with(world, prev_with);
}
if (prev_scope) {
ecs_set_scope(world, prev_scope);
}
}
#else
(void)world;
(void)name;
(void)allow_tag;
ecs_assert(registered(world), ECS_INVALID_OPERATION,
"component '%s' was not registered before use",
type_name<T>());
#endif
// By now we should have a valid identifier
ecs_assert(s_id != 0, ECS_INTERNAL_ERROR, NULL);
return s_id;
}
// Return the size of a component.
static size_t size() {
ecs_assert(s_id != 0, ECS_INTERNAL_ERROR, NULL);
return s_size;
}
// Return the alignment of a component.
static size_t alignment() {
ecs_assert(s_id != 0, ECS_INTERNAL_ERROR, NULL);
return s_alignment;
}
// Was the component already registered.
static bool registered(flecs::world_t *world) {
if (s_reset_count != ecs_cpp_reset_count_get()) {
reset();
}
if (s_id == 0) {
return false;
}
if (world && !ecs_exists(world, s_id)) {
return false;
}
return true;
}
// This function is only used to test cross-translation unit features. No
// code other than test cases should invoke this function.
static void reset() {
s_id = 0;
s_size = 0;
s_alignment = 0;
s_allow_tag = true;
}
static entity_t s_id;
static size_t s_size;
static size_t s_alignment;
static bool s_allow_tag;
static int32_t s_reset_count;
};
// Global templated variables that hold component identifier and other info
template <typename T> entity_t cpp_type_impl<T>::s_id;
template <typename T> size_t cpp_type_impl<T>::s_size;
template <typename T> size_t cpp_type_impl<T>::s_alignment;
template <typename T> bool cpp_type_impl<T>::s_allow_tag( true );
template <typename T> int32_t cpp_type_impl<T>::s_reset_count;
// Front facing class for implicitly registering a component & obtaining
// static component data
// Regular type
template <typename T>
struct cpp_type<T, if_not_t< is_pair<T>::value >>
: cpp_type_impl<base_type_t<T>> { };
// Pair type
template <typename T>
struct cpp_type<T, if_t< is_pair<T>::value >>
{
// Override id method to return id of pair
static id_t id(world_t *world = nullptr) {
return ecs_pair(
cpp_type< pair_first_t<T> >::id(world),
cpp_type< pair_second_t<T> >::id(world));
}
};
} // namespace _
/** Untyped component class.
* Generic base class for flecs::component.
*
* @ingroup cpp_components
*/
struct untyped_component : entity {
using entity::entity;
# ifdef FLECS_META
/**
* @file addons/cpp/mixins/meta/untyped_component.inl
* @brief Meta component mixin.
*/
/**
* @memberof flecs::component
* @ingroup cpp_addons_meta
*
* @{
*/
/** Add member with unit. */
untyped_component& member(flecs::entity_t type_id, flecs::entity_t unit, const char *name, int32_t count = 0, size_t offset = 0) {
ecs_entity_desc_t desc = {};
desc.name = name;
desc.add[0] = ecs_pair(flecs::ChildOf, m_id);
ecs_entity_t eid = ecs_entity_init(m_world, &desc);
ecs_assert(eid != 0, ECS_INTERNAL_ERROR, NULL);
flecs::entity e(m_world, eid);
Member m = {};
m.type = type_id;
m.unit = unit;
m.count = count;
m.offset = static_cast<int32_t>(offset);
e.set<Member>(m);
return *this;
}
/** Add member. */
untyped_component& member(flecs::entity_t type_id, const char* name, int32_t count = 0, size_t offset = 0) {
return member(type_id, 0, name, count, offset);
}
/** Add member. */
template <typename MemberType>
untyped_component& member(const char *name, int32_t count = 0, size_t offset = 0) {
flecs::entity_t type_id = _::cpp_type<MemberType>::id(m_world);
return member(type_id, name, count, offset);
}
/** Add member with unit. */
template <typename MemberType>
untyped_component& member(flecs::entity_t unit, const char *name, int32_t count = 0, size_t offset = 0) {
flecs::entity_t type_id = _::cpp_type<MemberType>::id(m_world);
return member(type_id, unit, name, count, offset);
}
/** Add member with unit. */
template <typename MemberType, typename UnitType>
untyped_component& member(const char *name, int32_t count = 0, size_t offset = 0) {
flecs::entity_t type_id = _::cpp_type<MemberType>::id(m_world);
flecs::entity_t unit_id = _::cpp_type<UnitType>::id(m_world);
return member(type_id, unit_id, name, count, offset);
}
/** Add member using pointer-to-member. */
template <typename MemberType, typename ComponentType, typename RealType = typename std::remove_extent<MemberType>::type>
untyped_component& member(const char* name, const MemberType ComponentType::* ptr) {
flecs::entity_t type_id = _::cpp_type<RealType>::id(m_world);
size_t offset = reinterpret_cast<size_t>(&(static_cast<ComponentType*>(nullptr)->*ptr));
return member(type_id, name, std::extent<MemberType>::value, offset);
}
/** Add member with unit using pointer-to-member. */
template <typename MemberType, typename ComponentType, typename RealType = typename std::remove_extent<MemberType>::type>
untyped_component& member(flecs::entity_t unit, const char* name, const MemberType ComponentType::* ptr) {
flecs::entity_t type_id = _::cpp_type<RealType>::id(m_world);
size_t offset = reinterpret_cast<size_t>(&(static_cast<ComponentType*>(nullptr)->*ptr));
return member(type_id, unit, name, std::extent<MemberType>::value, offset);
}
/** Add member with unit using pointer-to-member. */
template <typename UnitType, typename MemberType, typename ComponentType, typename RealType = typename std::remove_extent<MemberType>::type>
untyped_component& member(const char* name, const MemberType ComponentType::* ptr) {
flecs::entity_t type_id = _::cpp_type<RealType>::id(m_world);
flecs::entity_t unit_id = _::cpp_type<UnitType>::id(m_world);
size_t offset = reinterpret_cast<size_t>(&(static_cast<ComponentType*>(nullptr)->*ptr));
return member(type_id, unit_id, name, std::extent<MemberType>::value, offset);
}
/** Add constant. */
untyped_component& constant(const char *name, int32_t value) {
ecs_add_id(m_world, m_id, _::cpp_type<flecs::Enum>::id(m_world));
ecs_entity_desc_t desc = {};
desc.name = name;
desc.add[0] = ecs_pair(flecs::ChildOf, m_id);
ecs_entity_t eid = ecs_entity_init(m_world, &desc);
ecs_assert(eid != 0, ECS_INTERNAL_ERROR, NULL);
ecs_set_id(m_world, eid,
ecs_pair(flecs::Constant, flecs::I32), sizeof(int32_t),
&value);
return *this;
}
/** Add bitmask constant. */
untyped_component& bit(const char *name, uint32_t value) {
ecs_add_id(m_world, m_id, _::cpp_type<flecs::Bitmask>::id(m_world));
ecs_entity_desc_t desc = {};
desc.name = name;
desc.add[0] = ecs_pair(flecs::ChildOf, m_id);
ecs_entity_t eid = ecs_entity_init(m_world, &desc);
ecs_assert(eid != 0, ECS_INTERNAL_ERROR, NULL);
ecs_set_id(m_world, eid,
ecs_pair(flecs::Constant, flecs::U32), sizeof(uint32_t),
&value);
return *this;
}
/** Register array metadata for component */
template <typename Elem>
untyped_component& array(int32_t elem_count) {
ecs_array_desc_t desc = {};
desc.entity = m_id;
desc.type = _::cpp_type<Elem>::id(m_world);
desc.count = elem_count;
ecs_array_init(m_world, &desc);
return *this;
}
/** Add member value range */
untyped_component& range(double min, double max) {
const flecs::member_t *m = ecs_cpp_last_member(m_world, m_id);
if (!m) {
return *this;
}
flecs::world w(m_world);
flecs::entity me = w.entity(m->member);
flecs::MemberRanges *mr = me.get_mut<flecs::MemberRanges>();
mr->value.min = min;
mr->value.max = max;
me.modified<flecs::MemberRanges>();
return *this;
}
/** Add member warning range */
untyped_component& warning_range(double min, double max) {
const flecs::member_t *m = ecs_cpp_last_member(m_world, m_id);
if (!m) {
return *this;
}
flecs::world w(m_world);
flecs::entity me = w.entity(m->member);
flecs::MemberRanges *mr = me.get_mut<flecs::MemberRanges>();
mr->warning.min = min;
mr->warning.max = max;
me.modified<flecs::MemberRanges>();
return *this;
}
/** Add member error range */
untyped_component& error_range(double min, double max) {
const flecs::member_t *m = ecs_cpp_last_member(m_world, m_id);
if (!m) {
return *this;
}
flecs::world w(m_world);
flecs::entity me = w.entity(m->member);
flecs::MemberRanges *mr = me.get_mut<flecs::MemberRanges>();
mr->error.min = min;
mr->error.max = max;
me.modified<flecs::MemberRanges>();
return *this;
}
/** @} */
# endif
# ifdef FLECS_METRICS
/**
* @file addons/cpp/mixins/meta/untyped_component.inl
* @brief Metrics component mixin.
*/
/**
* @memberof flecs::component
* @ingroup cpp_addons_metrics
*
* @{
*/
/** Register member as metric.
* When no explicit name is provided, this operation will derive the metric name
* from the member name. When the member name is "value", the operation will use
* the name of the component.
*
* When the brief parameter is provided, it is set on the metric as if
* set_doc_brief is used. The brief description can be obtained with
* get_doc_brief.
*
* @tparam Kind Metric kind (Counter, CounterIncrement or Gauge).
* @param parent Parent entity of the metric (optional).
* @param brief Description for metric (optional).
* @param name Name of metric (optional).
*/
template <typename Kind>
untyped_component& metric(
flecs::entity_t parent = 0,
const char *brief = nullptr,
const char *name = nullptr);
/** @} */
# endif
};
/** Component class.
* Class used to register components and component metadata.
*
* @ingroup cpp_components
*/
template <typename T>
struct component : untyped_component {
/** Register a component.
* If the component was already registered, this operation will return a handle
* to the existing component.
*
* @param world The world for which to register the component.
* @param name Optional name (overrides typename).
* @param allow_tag If true, empty types will be registered with size 0.
* @param id Optional id to register component with.
*/
component(
flecs::world_t *world,
const char *name = nullptr,
bool allow_tag = true,
flecs::id_t id = 0)
{
const char *n = name;
bool implicit_name = false;
if (!n) {
n = _::type_name<T>();
/* Keep track of whether name was explicitly set. If not, and the
* component was already registered, just use the registered name.
*
* The registered name may differ from the typename as the registered
* name includes the flecs scope. This can in theory be different from
* the C++ namespace though it is good practice to keep them the same */
implicit_name = true;
}
if (_::cpp_type<T>::registered(world)) {
/* Obtain component id. Because the component is already registered,
* this operation does nothing besides returning the existing id */
id = _::cpp_type<T>::id_explicit(world, name, allow_tag, id);
ecs_cpp_component_validate(world, id, n, _::symbol_name<T>(),
_::cpp_type<T>::size(),
_::cpp_type<T>::alignment(),
implicit_name);
} else {
/* If component is registered from an existing scope, ignore the
* namespace in the name of the component. */
if (implicit_name && (ecs_get_scope(world) != 0)) {
/* If the type is a template type, make sure to ignore ':'
* inside the template parameter list. */
const char *start = strchr(n, '<'), *last_elem = NULL;
if (start) {
const char *ptr = start;
while (ptr[0] && (ptr[0] != ':') && (ptr > n)) {
ptr --;
}
if (ptr[0] == ':') {
last_elem = ptr;
}
}
if (last_elem) {
name = last_elem + 1;
}
}
/* Find or register component */
bool existing;
id = ecs_cpp_component_register(world, id, n, _::symbol_name<T>(),
ECS_SIZEOF(T), ECS_ALIGNOF(T), implicit_name, &existing);
/* Initialize static component data */
id = _::cpp_type<T>::id_explicit(world, name, allow_tag, id);
/* Initialize lifecycle actions (ctor, dtor, copy, move) */
if (_::cpp_type<T>::size() && !existing) {
_::register_lifecycle_actions<T>(world, id);
}
}
m_world = world;
m_id = id;
}
/** Register on_add hook. */
template <typename Func>
component<T>& on_add(Func&& func) {
using Delegate = typename _::each_delegate<typename std::decay<Func>::type, T>;
flecs::type_hooks_t h = get_hooks();
ecs_assert(h.on_add == nullptr, ECS_INVALID_OPERATION,
"on_add hook is already set");
BindingCtx *ctx = get_binding_ctx(h);
h.on_add = Delegate::run_add;
ctx->on_add = FLECS_NEW(Delegate)(FLECS_FWD(func));
ctx->free_on_add = reinterpret_cast<ecs_ctx_free_t>(
_::free_obj<Delegate>);
ecs_set_hooks_id(m_world, m_id, &h);
return *this;
}
/** Register on_remove hook. */
template <typename Func>
component<T>& on_remove(Func&& func) {
using Delegate = typename _::each_delegate<
typename std::decay<Func>::type, T>;
flecs::type_hooks_t h = get_hooks();
ecs_assert(h.on_remove == nullptr, ECS_INVALID_OPERATION,
"on_remove hook is already set");
BindingCtx *ctx = get_binding_ctx(h);
h.on_remove = Delegate::run_remove;
ctx->on_remove = FLECS_NEW(Delegate)(FLECS_FWD(func));
ctx->free_on_remove = reinterpret_cast<ecs_ctx_free_t>(
_::free_obj<Delegate>);
ecs_set_hooks_id(m_world, m_id, &h);
return *this;
}
/** Register on_set hook. */
template <typename Func>
component<T>& on_set(Func&& func) {
using Delegate = typename _::each_delegate<
typename std::decay<Func>::type, T>;
flecs::type_hooks_t h = get_hooks();
ecs_assert(h.on_set == nullptr, ECS_INVALID_OPERATION,
"on_set hook is already set");
BindingCtx *ctx = get_binding_ctx(h);
h.on_set = Delegate::run_set;
ctx->on_set = FLECS_NEW(Delegate)(FLECS_FWD(func));
ctx->free_on_set = reinterpret_cast<ecs_ctx_free_t>(
_::free_obj<Delegate>);
ecs_set_hooks_id(m_world, m_id, &h);
return *this;
}
# ifdef FLECS_META
/** Register opaque type interface */
template <typename Func>
component& opaque(const Func& type_support) {
flecs::world world(m_world);
auto ts = type_support(world);
ts.desc.entity = _::cpp_type<T>::id(m_world);
ecs_opaque_init(m_world, &ts.desc);
return *this;
}
flecs::opaque<T> opaque(flecs::entity_t as_type) {
return flecs::opaque<T>(m_world).as_type(as_type);
}
flecs::opaque<T> opaque(flecs::entity as_type) {
return this->opaque(as_type.id());
}
flecs::opaque<T> opaque(flecs::untyped_component as_type) {
return this->opaque(as_type.id());
}
/** Return opaque type builder for collection type */
template <typename ElemType>
flecs::opaque<T, ElemType> opaque(flecs::id_t as_type) {
return flecs::opaque<T, ElemType>(m_world).as_type(as_type);
}
/** Add constant. */
component<T>& constant(const char *name, T value) {
int32_t v = static_cast<int32_t>(value);
untyped_component::constant(name, v);
return *this;
}
# endif
private:
using BindingCtx = _::component_binding_ctx;
BindingCtx* get_binding_ctx(flecs::type_hooks_t& h){
BindingCtx *result = static_cast<BindingCtx*>(h.binding_ctx);
if (!result) {
result = FLECS_NEW(BindingCtx);
h.binding_ctx = result;
h.binding_ctx_free = reinterpret_cast<ecs_ctx_free_t>(
_::free_obj<BindingCtx>);
}
return result;
}
flecs::type_hooks_t get_hooks() {
const flecs::type_hooks_t* h = ecs_get_hooks_id(m_world, m_id);
if (h) {
return *h;
} else {
return {};
}
}
};
/** Get id currently assigned to component. If no world has registered the
* component yet, this operation will return 0. */
template <typename T>
flecs::entity_t type_id() {
if (_::cpp_type<T>::s_reset_count == ecs_cpp_reset_count_get()) {
return _::cpp_type<T>::s_id;
} else {
return 0;
}
}
/** Reset static component ids.
* When components are registered their component ids are stored in a static
* type specific variable. This stored id is passed into component registration
* functions to ensure consistent ids across worlds.
*
* In some cases this can be undesirable, like when a process repeatedly creates
* worlds with different components. A typical example where this can happen is
* when running multiple tests in a single process, where each test registers
* its own set of components.
*
* This operation can be used to prevent reusing of component ids and force
* generating a new ids upon registration.
*
* Note that this operation should *never* be called while there are still
* alive worlds in a process. Doing so results in undefined behavior.
*
* Also note that this operation does not actually change the static component
* variables. It only ensures that the next time a component id is requested, a
* new id will be generated.
*
* @ingroup cpp_components
*/
inline void reset() {
ecs_cpp_reset_count_inc();
}
}
/** @} */
/**
* @file addons/cpp/type.hpp
* @brief Utility functions for id vector.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_types Types
* @ingroup cpp_core
* @brief Type operations.
*
* @{
*/
/** Type class.
* A type is a vector of component ids which can be requested from entities or tables.
*/
struct type {
type() : m_world(nullptr), m_type(nullptr) { }
type(world_t *world, const type_t *t)
: m_world(world)
, m_type(t) { }
/** Convert type to comma-separated string */
flecs::string str() const {
return flecs::string(ecs_type_str(m_world, m_type));
}
/** Return number of ids in type */
int32_t count() const {
if (!m_type) {
return 0;
}
return m_type->count;
}
/** Return pointer to array. */
flecs::id_t* array() const {
if (!m_type) {
return nullptr;
}
return m_type->array;
}
/** Get id at specified index in type */
flecs::id get(int32_t index) const {
ecs_assert(m_type != NULL, ECS_INVALID_PARAMETER, NULL);
ecs_assert(m_type->count > index, ECS_OUT_OF_RANGE, NULL);
if (!m_type) {
return flecs::id();
}
return flecs::id(m_world, m_type->array[index]);
}
flecs::id_t* begin() const {
return m_type->array;
}
flecs::id_t* end() const {
return &m_type->array[m_type->count];
}
/** Implicit conversion to type_t */
operator const type_t*() const {
return m_type;
}
private:
world_t *m_world;
const type_t *m_type;
};
/** #} */
}
/**
* @file addons/cpp/table.hpp
* @brief Direct access to table data.
*/
#pragma once
namespace flecs {
/**
* @defgroup cpp_tables Tables
* @ingroup cpp_core
* Table operations.
*
* @{
*/
struct table {
table() : m_world(nullptr), m_table(nullptr) { }
table(world_t *world, table_t *t)
: m_world(world)
, m_table(t) { }
virtual ~table() { }
/** Convert table type to string. */
flecs::string str() const {
return flecs::string(ecs_table_str(m_world, m_table));
}
/** Get table type. */
flecs::type type() const {
return flecs::type(m_world, ecs_table_get_type(m_table));
}
/** Get table count. */
int32_t count() const {
return ecs_table_count(m_table);
}
/** Find type index for (component) id.
*
* @param id The (component) id.
* @return The index of the id in the table type, -1 if not found/
*/
int32_t type_index(flecs::id_t id) const {
return ecs_table_get_type_index(m_world, m_table, id);
}
/** Find type index for type.
*
* @tparam T The type.
* @return True if the table has the type, false if not.
*/
template <typename T>
int32_t type_index() const {
return type_index(_::cpp_type<T>::id(m_world));
}
/** Find type index for pair.
* @param first First element of pair.
* @param second Second element of pair.
* @return True if the table has the pair, false if not.
*/
int32_t type_index(flecs::entity_t first, flecs::entity_t second) const {
return type_index(ecs_pair(first, second));
}
/** Find type index for pair.
* @tparam First First element of pair.
* @param second Second element of pair.
* @return True if the table has the pair, false if not.
*/
template <typename First>
int32_t type_index(flecs::entity_t second) const {
return type_index(_::cpp_type<First>::id(m_world), second);
}
/** Find type index for pair.
* @tparam First First element of pair.
* @tparam Second Second element of pair.
* @return True if the table has the pair, false if not.
*/
template <typename First, typename Second>
int32_t type_index() const {
return type_index<First>(_::cpp_type<Second>::id(m_world));
}
/** Find column index for (component) id.
*
* @param id The (component) id.
* @return The index of the id in the table type, -1 if not found/
*/
int32_t column_index(flecs::id_t id) const {
return ecs_table_get_column_index(m_world, m_table, id);
}
/** Find column index for type.
*
* @tparam T The type.
* @return True if the table has the type, false if not.
*/
template <typename T>
int32_t column_index() const {
return column_index(_::cpp_type<T>::id(m_world));
}
/** Find column index for pair.
* @param first First element of pair.
* @param second Second element of pair.
* @return True if the table has the pair, false if not.
*/
int32_t column_index(flecs::entity_t first, flecs::entity_t second) const {
return column_index(ecs_pair(first, second));
}
/** Find column index for pair.
* @tparam First First element of pair.
* @param second Second element of pair.
* @return True if the table has the pair, false if not.
*/
template <typename First>
int32_t column_index(flecs::entity_t second) const {
return column_index(_::cpp_type<First>::id(m_world), second);
}
/** Find column index for pair.
* @tparam First First element of pair.
* @tparam Second Second element of pair.
* @return True if the table has the pair, false if not.
*/
template <typename First, typename Second>
int32_t column_index() const {
return column_index<First>(_::cpp_type<Second>::id(m_world));
}
/** Test if table has (component) id.
*
* @param id The (component) id.
* @return True if the table has the id, false if not.
*/
bool has(flecs::id_t id) const {
return type_index(id) != -1;
}
/** Test if table has the type.
*
* @tparam T The type.
* @return True if the table has the type, false if not.
*/
template <typename T>
bool has() const {
return type_index<T>() != -1;
}
/** Test if table has the pair.
*
* @param first First element of pair.
* @param second Second element of pair.
* @return True if the table has the pair, false if not.
*/
bool has(flecs::entity_t first, flecs::entity_t second) const {
return type_index(first, second) != -1;
}
/** Test if table has the pair.
*
* @tparam First First element of pair.
* @param second Second element of pair.
* @return True if the table has the pair, false if not.
*/
template <typename First>
bool has(flecs::entity_t second) const {
return type_index<First>(second) != -1;
}
/** Test if table has the pair.
*
* @tparam First First element of pair.
* @tparam Second Second element of pair.
* @return True if the table has the pair, false if not.
*/
template <typename First, typename Second>
bool has() const {
return type_index<First, Second>() != -1;
}
/** Get pointer to component array by column index.
*
* @param index The column index.
* @return Pointer to the column, NULL if not a component.
*/
virtual void* get_column(int32_t index) const {
return ecs_table_get_column(m_table, index, 0);
}
/** Get pointer to component array by component.
*
* @param id The component id.
* @return Pointer to the column, NULL if not found.
*/
void* get(flecs::id_t id) const {
int32_t index = column_index(id);
if (index == -1) {
return NULL;
}
return get_column(index);
}
/** Get pointer to component array by pair.
*
* @param first The first element of the pair.
* @param second The second element of the pair.
* @return Pointer to the column, NULL if not found.
*/
void* get(flecs::entity_t first, flecs::entity_t second) const {
return get(ecs_pair(first, second));
}
/** Get pointer to component array by component.
*
* @tparam T The component.
* @return Pointer to the column, NULL if not found.
*/
template <typename T, if_t< is_actual<T>::value > = 0>
T* get() const {
return static_cast<T*>(get(_::cpp_type<T>::id(m_world)));
}
/** Get pointer to component array by (enum) component.
*
* @tparam T The (enum) component.
* @return Pointer to the column, NULL if not found.
*/
template <typename T, if_t< is_enum<T>::value > = 0>
T* get() const {
return static_cast<T*>(get(_::cpp_type<T>::id(m_world)));
}
/** Get pointer to component array by component.
*
* @tparam T The component.
* @return Pointer to the column, NULL if not found.
*/
template <typename T, typename A = actual_type_t<T>,
if_t< flecs::is_pair<T>::value > = 0>
A* get() const {
return static_cast<A*>(get(_::cpp_type<T>::id(m_world)));
}
/** Get pointer to component array by pair.
*
* @tparam First The first element of the pair.
* @param second The second element of the pair.
* @return Pointer to the column, NULL if not found.
*/
template <typename First>
First* get(flecs::entity_t second) const {
return static_cast<First*>(get(_::cpp_type<First>::id(m_world), second));
}
/** Get pointer to component array by pair.
*
* @tparam First The first element of the pair.
* @tparam Second The second element of the pair.
* @return Pointer to the column, NULL if not found.
*/
template <typename First, typename Second, typename P = flecs::pair<First, Second>,
typename A = actual_type_t<P>, if_not_t< flecs::is_pair<First>::value> = 0>
A* get() const {
return static_cast<A*>(get<First>(_::cpp_type<Second>::id(m_world)));
}
/** Get column size */
size_t column_size(int32_t index) {
return ecs_table_get_column_size(m_table, index);
}
/** Get depth for given relationship.
*
* @param rel The relationship.
* @return The depth.
*/
int32_t depth(flecs::entity_t rel) {
return ecs_table_get_depth(m_world, m_table, rel);
}
/** Get depth for given relationship.
*
* @tparam Rel The relationship.
* @return The depth.
*/
template <typename Rel>
int32_t depth() {
return depth(_::cpp_type<Rel>::id(m_world));
}
/* Implicit conversion to table_t */
operator table_t*() const {
return m_table;
}
protected:
world_t *m_world;
table_t *m_table;
};
struct table_range : table {
table_range()
: table()
, m_offset(0)
, m_count(0) { }
table_range(world_t *world, table_t *t, int32_t offset, int32_t count)
: table(world, t)
, m_offset(offset)
, m_count(count) { }
int32_t offset() const {
return m_offset;
}
int32_t count() const {
return m_count;
}
/** Get pointer to component array by column index.
*
* @param index The column index.
* @return Pointer to the column, NULL if not a component.
*/
void* get_column(int32_t index) const override {
return ecs_table_get_column(m_table, index, m_offset);
}
private:
int32_t m_offset = 0;
int32_t m_count = 0;
};
/** @} */
}
// Mixin implementations
/**
* @file addons/cpp/mixins/id/impl.hpp
* @brief Id class implementation.
*/
#pragma once
namespace flecs {
inline flecs::entity id::entity() const {
ecs_assert(!is_pair(), ECS_INVALID_OPERATION, NULL);
ecs_assert(!flags(), ECS_INVALID_OPERATION, NULL);
return flecs::entity(m_world, m_id);
}
inline flecs::entity id::flags() const {
return flecs::entity(m_world, m_id & ECS_ID_FLAGS_MASK);
}
inline flecs::entity id::first() const {
ecs_assert(is_pair(), ECS_INVALID_OPERATION, NULL);
flecs::entity_t e = ECS_PAIR_FIRST(m_id);
if (m_world) {
return flecs::entity(m_world, ecs_get_alive(m_world, e));
} else {
return flecs::entity(e);
}
}
inline flecs::entity id::second() const {
flecs::entity_t e = ECS_PAIR_SECOND(m_id);
if (m_world) {
return flecs::entity(m_world, ecs_get_alive(m_world, e));
} else {
return flecs::entity(e);
}
}
inline flecs::entity id::add_flags(flecs::id_t flags) const {
return flecs::entity(m_world, m_id | flags);
}
inline flecs::entity id::remove_flags(flecs::id_t flags) const {
(void)flags;
ecs_assert((m_id & ECS_ID_FLAGS_MASK) == flags, ECS_INVALID_PARAMETER, NULL);
return flecs::entity(m_world, m_id & ECS_COMPONENT_MASK);
}
inline flecs::entity id::remove_flags() const {
return flecs::entity(m_world, m_id & ECS_COMPONENT_MASK);
}
inline flecs::entity id::remove_generation() const {
return flecs::entity(m_world, static_cast<uint32_t>(m_id));
}
inline flecs::world id::world() const {
return flecs::world(m_world);
}
inline flecs::entity id::type_id() const {
return flecs::entity(m_world, ecs_get_typeid(m_world, m_id));
}
// Id mixin implementation
template <typename T>
inline flecs::id world::id() const {
return flecs::id(m_world, _::cpp_type<T>::id(m_world));
}
template <typename ... Args>
inline flecs::id world::id(Args&&... args) const {
return flecs::id(m_world, FLECS_FWD(args)...);
}
template <typename First, typename Second>
inline flecs::id world::pair() const {
return flecs::id(
m_world,
ecs_pair(
_::cpp_type<First>::id(m_world),
_::cpp_type<Second>::id(m_world)));
}
template <typename First>
inline flecs::id world::pair(entity_t o) const {
ecs_assert(!ECS_IS_PAIR(o), ECS_INVALID_PARAMETER,
"cannot create nested pairs");
return flecs::id(
m_world,
ecs_pair(
_::cpp_type<First>::id(m_world),
o));
}
inline flecs::id world::pair(entity_t r, entity_t o) const {
ecs_assert(!ECS_IS_PAIR(r) && !ECS_IS_PAIR(o), ECS_INVALID_PARAMETER,
"cannot create nested pairs");
return flecs::id(
m_world,
ecs_pair(r, o));
}
}
/**
* @file addons/cpp/mixins/entity/impl.hpp
* @brief Entity implementation.
*/
#pragma once
namespace flecs {
template <typename T>
flecs::entity ref<T>::entity() const {
return flecs::entity(m_world, m_ref.entity);
}
template <typename Self>
template <typename Func, if_t< is_callable<Func>::value > >
inline Self& entity_builder<Self>::set(const Func& func) {
_::entity_with_delegate<Func>::invoke_get_mut(
this->m_world, this->m_id, func);
return to_base();
}
template <typename T, if_t< is_enum<T>::value > >
const T* entity_view::get() const {
entity_t r = _::cpp_type<T>::id(m_world);
entity_t c = ecs_get_target(m_world, m_id, r, 0);
if (c) {
// Get constant value from constant entity
const T* v = static_cast<const T*>(ecs_get_id(m_world, c, r));
ecs_assert(v != NULL, ECS_INTERNAL_ERROR,
"missing enum constant value");
return v;
} else {
// If there is no matching pair for (r, *), try just r
return static_cast<const T*>(ecs_get_id(m_world, m_id, r));
}
}
template<typename First>
inline flecs::entity entity_view::target(int32_t index) const
{
return flecs::entity(m_world,
ecs_get_target(m_world, m_id, _::cpp_type<First>::id(m_world), index));
}
inline flecs::entity entity_view::target(
flecs::entity_t relationship,
int32_t index) const
{
return flecs::entity(m_world,
ecs_get_target(m_world, m_id, relationship, index));
}
inline flecs::entity entity_view::target_for(
flecs::entity_t relationship,
flecs::id_t id) const
{
return flecs::entity(m_world,
ecs_get_target_for_id(m_world, m_id, relationship, id));
}
template <typename T>
inline flecs::entity entity_view::target_for(flecs::entity_t relationship) const {
return target_for(relationship, _::cpp_type<T>::id(m_world));
}
template <typename First, typename Second>
inline flecs::entity entity_view::target_for(flecs::entity_t relationship) const {
return target_for(relationship, _::cpp_type<First, Second>::id(m_world));
}
inline flecs::entity entity_view::parent() const {
return target(flecs::ChildOf);
}
inline flecs::entity entity_view::mut(const flecs::world& stage) const {
ecs_assert(!stage.is_readonly(), ECS_INVALID_PARAMETER,
"cannot use readonly world/stage to create mutable handle");
return flecs::entity(m_id).set_stage(stage.c_ptr());
}
inline flecs::entity entity_view::mut(const flecs::iter& it) const {
ecs_assert(!it.world().is_readonly(), ECS_INVALID_PARAMETER,
"cannot use iterator created for readonly world/stage to create mutable handle");
return flecs::entity(m_id).set_stage(it.world().c_ptr());
}
inline flecs::entity entity_view::mut(const flecs::entity_view& e) const {
ecs_assert(!e.world().is_readonly(), ECS_INVALID_PARAMETER,
"cannot use entity created for readonly world/stage to create mutable handle");
return flecs::entity(m_id).set_stage(e.m_world);
}
inline flecs::entity entity_view::set_stage(world_t *stage) {
return flecs::entity(stage, m_id);
}
inline flecs::type entity_view::type() const {
return flecs::type(m_world, ecs_get_type(m_world, m_id));
}
inline flecs::table entity_view::table() const {
return flecs::table(m_world, ecs_get_table(m_world, m_id));
}
inline flecs::table_range entity_view::range() const {
ecs_record_t *r = ecs_record_find(m_world, m_id);
if (r) {
return flecs::table_range(m_world, r->table,
ECS_RECORD_TO_ROW(r->row), 1);
}
return flecs::table_range();
}
template <typename Func>
inline void entity_view::each(const Func& func) const {
const ecs_type_t *type = ecs_get_type(m_world, m_id);
if (!type) {
return;
}
const ecs_id_t *ids = type->array;
int32_t count = type->count;
for (int i = 0; i < count; i ++) {
ecs_id_t id = ids[i];
flecs::id ent(m_world, id);
func(ent);
// Union object is not stored in type, so handle separately
if (ECS_PAIR_FIRST(id) == EcsUnion) {
ent = flecs::id(m_world, ECS_PAIR_SECOND(id),
ecs_get_target(m_world, m_id, ECS_PAIR_SECOND(id), 0));
func(ent);
}
}
}
template <typename Func>
inline void entity_view::each(flecs::id_t pred, flecs::id_t obj, const Func& func) const {
flecs::world_t *real_world = const_cast<flecs::world_t*>(
ecs_get_world(m_world));
const ecs_table_t *table = ecs_get_table(m_world, m_id);
if (!table) {
return;
}
const ecs_type_t *type = ecs_table_get_type(table);
if (!type) {
return;
}
flecs::id_t pattern = pred;
if (obj) {
pattern = ecs_pair(pred, obj);
}
int32_t cur = 0;
id_t *ids = type->array;
while (-1 != (cur = ecs_search_offset(real_world, table, cur, pattern, 0)))
{
flecs::id ent(m_world, ids[cur]);
func(ent);
cur ++;
}
}
template <typename Func>
inline void entity_view::each(const flecs::entity_view& rel, const Func& func) const {
return this->each(rel, flecs::Wildcard, [&](flecs::id id) {
flecs::entity obj = id.second();
func(obj);
});
}
template <typename Func, if_t< is_callable<Func>::value > >
inline bool entity_view::get(const Func& func) const {
return _::entity_with_delegate<Func>::invoke_get(m_world, m_id, func);
}
inline flecs::entity entity_view::lookup(const char *path, bool search_path) const {
ecs_assert(m_id != 0, ECS_INVALID_PARAMETER, "invalid lookup from null handle");
auto id = ecs_lookup_path_w_sep(m_world, m_id, path, "::", "::", search_path);
return flecs::entity(m_world, id);
}
inline flecs::entity entity_view::clone(bool copy_value, flecs::entity_t dst_id) const {
if (!dst_id) {
dst_id = ecs_new_id(m_world);
}
flecs::entity dst = flecs::entity(m_world, dst_id);
ecs_clone(m_world, dst_id, m_id, copy_value);
return dst;
}
// Entity mixin implementation
template <typename... Args>
inline flecs::entity world::entity(Args &&... args) const {
return flecs::entity(m_world, FLECS_FWD(args)...);
}
template <typename E, if_t< is_enum<E>::value >>
inline flecs::id world::id(E value) const {
flecs::entity_t constant = enum_type<E>(m_world).entity(value);
return flecs::id(m_world, constant);
}
template <typename E, if_t< is_enum<E>::value >>
inline flecs::entity world::entity(E value) const {
flecs::entity_t constant = enum_type<E>(m_world).entity(value);
return flecs::entity(m_world, constant);
}
template <typename T>
inline flecs::entity world::entity(const char *name) const {
return flecs::entity(m_world,
_::cpp_type<T>::id_explicit(m_world, name, true, 0, false) );
}
template <typename... Args>
inline flecs::entity world::prefab(Args &&... args) const {
flecs::entity result = flecs::entity(m_world, FLECS_FWD(args)...);
result.add(flecs::Prefab);
return result;
}
template <typename T>
inline flecs::entity world::prefab(const char *name) const {
flecs::entity result = flecs::component<T>(m_world, name, true);
result.add(flecs::Prefab);
return result;
}
}
/**
* @file addons/cpp/mixins/component/impl.hpp
* @brief Component mixin implementation
*/
#pragma once
namespace flecs {
template <typename T, typename... Args>
inline flecs::component<T> world::component(Args &&... args) const {
return flecs::component<T>(m_world, FLECS_FWD(args)...);
}
template <typename... Args>
inline flecs::untyped_component world::component(Args &&... args) const {
return flecs::untyped_component(m_world, FLECS_FWD(args)...);
}
} // namespace flecs
/**
* @file addons/cpp/mixins/term/impl.hpp
* @brief Term implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/term/builder_i.hpp
* @brief Term builder interface.
*/
#pragma once
/**
* @file addons/cpp/utils/signature.hpp
* @brief Compile time utilities for deriving query attributes from param pack.
*/
#pragma once
#include <stdio.h>
namespace flecs {
namespace _ {
template <typename T, if_t< is_const_p<T>::value > = 0>
static constexpr flecs::inout_kind_t type_to_inout() {
return flecs::In;
}
template <typename T, if_t< is_reference<T>::value > = 0>
static constexpr flecs::inout_kind_t type_to_inout() {
return flecs::Out;
}
template <typename T, if_not_t<
is_const_p<T>::value || is_reference<T>::value > = 0>
static constexpr flecs::inout_kind_t type_to_inout() {
return flecs::InOutDefault;
}
template <typename T, if_t< is_pointer<T>::value > = 0>
static constexpr flecs::oper_kind_t type_to_oper() {
return flecs::Optional;
}
template <typename T, if_not_t< is_pointer<T>::value > = 0>
static constexpr flecs::oper_kind_t type_to_oper() {
return flecs::And;
}
template <typename ... Components>
struct sig {
sig(flecs::world_t *world)
: m_world(world)
, ids({ (_::cpp_type<Components>::id(world))... })
, inout ({ (type_to_inout<Components>())... })
, oper ({ (type_to_oper<Components>())... })
{ }
flecs::world_t *m_world;
flecs::array<flecs::id_t, sizeof...(Components)> ids;
flecs::array<flecs::inout_kind_t, sizeof...(Components)> inout;
flecs::array<flecs::oper_kind_t, sizeof...(Components)> oper;
template <typename Builder>
void populate(const Builder& b) {
size_t i = 0;
for (auto id : ids) {
if (!(id & ECS_ID_FLAGS_MASK)) {
const flecs::type_info_t *ti = ecs_get_type_info(m_world, id);
if (ti) {
// Union relationships always return a value of type
// flecs::entity_t which holds the target id of the
// union relationship.
// If a union component with a non-zero size (like an
// enum) is added to the query signature, the each/iter
// functions would accept a parameter of the component
// type instead of flecs::entity_t, which would cause
// an assert.
ecs_assert(!ti->size || !ecs_has_id(m_world, id, flecs::Union),
ECS_INVALID_PARAMETER,
"use term() method to add union relationship");
}
}
b->term(id).inout(inout[i]).oper(oper[i]);
i ++;
}
}
};
} // namespace _
} // namespace flecs
namespace flecs
{
/** Term identifier builder.
* A term identifier describes a single identifier in a term. Identifier
* descriptions can reference entities by id, name or by variable, which means
* the entity will be resolved when the term is evaluated.
*
* @ingroup cpp_core_filters
*/
template<typename Base>
struct term_id_builder_i {
term_id_builder_i() : m_term_id(nullptr) { }
virtual ~term_id_builder_i() { }
/* The self flag indicates the term identifier itself is used */
Base& self() {
this->assert_term_id();
m_term_id->flags |= flecs::Self;
return *this;
}
/* The up flag indicates that the term identifier may be substituted by
* traversing a relationship upwards. For example: substitute the identifier
* with its parent by traversing the ChildOf relationship. */
Base& up(flecs::entity_t trav = 0) {
this->assert_term_id();
m_term_id->flags |= flecs::Up;
if (trav) {
m_term_id->trav = trav;
}
return *this;
}
template <typename Trav>
Base& up() {
return this->up(_::cpp_type<Trav>::id(this->world_v()));
}
/* The cascade flag is like up, but returns results in breadth-first order.
* Only supported for flecs::query */
Base& cascade(flecs::entity_t trav = 0) {
this->assert_term_id();
m_term_id->flags |= flecs::Cascade;
if (trav) {
m_term_id->trav = trav;
}
return *this;
}
template <typename Trav>
Base& cascade() {
return this->cascade(_::cpp_type<Trav>::id(this->world_v()));
}
/* Use with cascade to iterate results in descending (bottom -> top) order */
Base& desc() {
this->assert_term_id();
m_term_id->flags |= flecs::Desc;
return *this;
}
/* The parent flag is short for up(flecs::ChildOf) */
Base& parent() {
this->assert_term_id();
m_term_id->flags |= flecs::Parent;
return *this;
}
/* Specify relationship to traverse, and flags to indicate direction */
Base& trav(flecs::entity_t trav, flecs::flags32_t flags = 0) {
this->assert_term_id();
m_term_id->trav = trav;
m_term_id->flags |= flags;
return *this;
}
/* Specify value of identifier by id */
Base& id(flecs::entity_t id) {
this->assert_term_id();
m_term_id->id = id;
return *this;
}
/* Specify value of identifier by id. Almost the same as id(entity), but this
* operation explicitly sets the flecs::IsEntity flag. This forces the id to
* be interpreted as entity, whereas not setting the flag would implicitly
* convert ids for builtin variables such as flecs::This to a variable.
*
* This function can also be used to disambiguate id(0), which would match
* both id(entity_t) and id(const char*).
*/
Base& entity(flecs::entity_t entity) {
this->assert_term_id();
m_term_id->flags = flecs::IsEntity;
m_term_id->id = entity;
return *this;
}
/* Specify value of identifier by name */
Base& name(const char *name) {
this->assert_term_id();
m_term_id->flags |= flecs::IsEntity;
m_term_id->name = const_cast<char*>(name);
return *this;
}
/* Specify identifier is a variable (resolved at query evaluation time) */
Base& var(const char *var_name) {
this->assert_term_id();
m_term_id->flags |= flecs::IsVariable;
m_term_id->name = const_cast<char*>(var_name);
return *this;
}
/* Override term id flags */
Base& flags(flecs::flags32_t flags) {
this->assert_term_id();
m_term_id->flags = flags;
return *this;
}
ecs_term_id_t *m_term_id;
protected:
virtual flecs::world_t* world_v() = 0;
private:
void assert_term_id() {
ecs_assert(m_term_id != NULL, ECS_INVALID_PARAMETER,
"no active term (call .term() first)");
}
operator Base&() {
return *static_cast<Base*>(this);
}
};
/** Term builder interface.
* A term is a single element of a query expression.
*
* @ingroup cpp_core_filters
*/
template<typename Base>
struct term_builder_i : term_id_builder_i<Base> {
term_builder_i() : m_term(nullptr) { }
term_builder_i(ecs_term_t *term_ptr) {
set_term(term_ptr);
}
Base& term(id_t id) {
return this->id(id);
}
/* Call prior to setting values for src identifier */
Base& src() {
this->assert_term();
this->m_term_id = &m_term->src;
return *this;
}
/* Call prior to setting values for first identifier. This is either the
* component identifier, or first element of a pair (in case second is
* populated as well). */
Base& first() {
this->assert_term();
this->m_term_id = &m_term->first;
return *this;
}
/* Call prior to setting values for second identifier. This is the second
* element of a pair. Requires that first() is populated as well. */
Base& second() {
this->assert_term();
this->m_term_id = &m_term->second;
return *this;
}
/* Select src identifier, initialize it with entity id */
Base& src(flecs::entity_t id) {
this->src();
this->id(id);
return *this;
}
/* Select src identifier, initialize it with id associated with type */
template<typename T>
Base& src() {
this->src(_::cpp_type<T>::id(this->world_v()));
return *this;
}
/* Select src identifier, initialize it with name. If name starts with a $
* the name is interpreted as a variable. */
Base& src(const char *name) {
ecs_assert(name != NULL, ECS_INVALID_PARAMETER, NULL);
this->src();
if (name[0] == '$') {
this->var(&name[1]);
} else {
this->name(name);
}
return *this;
}
/* Select first identifier, initialize it with entity id */
Base& first(flecs::entity_t id) {
this->first();
this->id(id);
return *this;
}
/* Select first identifier, initialize it with id associated with type */
template<typename T>
Base& first() {
this->first(_::cpp_type<T>::id(this->world_v()));
return *this;
}
/* Select first identifier, initialize it with name. If name starts with a $
* the name is interpreted as a variable. */
Base& first(const char *name) {
ecs_assert(name != NULL, ECS_INVALID_PARAMETER, NULL);
this->first();
if (name[0] == '$') {
this->var(&name[1]);
} else {
this->name(name);
}
return *this;
}
/* Select second identifier, initialize it with entity id */
Base& second(flecs::entity_t id) {
this->second();
this->id(id);
return *this;
}
/* Select second identifier, initialize it with id associated with type */
template<typename T>
Base& second() {
this->second(_::cpp_type<T>::id(this->world_v()));
return *this;
}
/* Select second identifier, initialize it with name. If name starts with a $
* the name is interpreted as a variable. */
Base& second(const char *name) {
ecs_assert(name != NULL, ECS_INVALID_PARAMETER, NULL);
this->second();
if (name[0] == '$') {
this->var(&name[1]);
} else {
this->name(name);
}
return *this;
}
/** Set role of term. */
Base& role(id_t role) {
this->assert_term();
m_term->id_flags = role;
return *this;
}
/** Set read/write access of term. */
Base& inout(flecs::inout_kind_t inout) {
this->assert_term();
m_term->inout = static_cast<ecs_inout_kind_t>(inout);
return *this;
}
/** Set read/write access for stage. Use this when a system reads or writes
* components other than the ones provided by the query. This information
* can be used by schedulers to insert sync/merge points between systems
* where deferred operations are flushed.
*
* Setting this is optional. If not set, the value of the accessed component
* may be out of sync for at most one frame.
*/
Base& inout_stage(flecs::inout_kind_t inout) {
this->assert_term();
m_term->inout = static_cast<ecs_inout_kind_t>(inout);
if (m_term->oper != EcsNot) {
this->src().entity(0);
}
return *this;
}
/** Short for inout_stage(flecs::Out).
* Use when system uses add, remove or set.
*/
Base& write() {
return this->inout_stage(flecs::Out);
}
/** Short for inout_stage(flecs::In).
* Use when system uses get.
*/
Base& read() {
return this->inout_stage(flecs::In);
}
/** Short for inout_stage(flecs::InOut).
* Use when system uses get_mut.
*/
Base& read_write() {
return this->inout_stage(flecs::InOut);
}
/** Short for inout(flecs::In) */
Base& in() {
return this->inout(flecs::In);
}
/** Short for inout(flecs::Out) */
Base& out() {
return this->inout(flecs::Out);
}
/** Short for inout(flecs::InOut) */
Base& inout() {
return this->inout(flecs::InOut);
}
/** Short for inout(flecs::In) */
Base& inout_none() {
return this->inout(flecs::InOutNone);
}
/** Set operator of term. */
Base& oper(flecs::oper_kind_t oper) {
this->assert_term();
m_term->oper = static_cast<ecs_oper_kind_t>(oper);
return *this;
}
/* Short for oper(flecs::And) */
Base& and_() {
return this->oper(flecs::And);
}
/* Short for oper(flecs::Or) */
Base& or_() {
return this->oper(flecs::Or);
}
/* Short for oper(flecs::Or) */
Base& not_() {
return this->oper(flecs::Not);
}
/* Short for oper(flecs::Or) */
Base& optional() {
return this->oper(flecs::Optional);
}
/* Short for oper(flecs::AndFrom) */
Base& and_from() {
return this->oper(flecs::AndFrom);
}
/* Short for oper(flecs::OrFrom) */
Base& or_from() {
return this->oper(flecs::OrFrom);
}
/* Short for oper(flecs::NotFrom) */
Base& not_from() {
return this->oper(flecs::NotFrom);
}
/** Match singleton. */
Base& singleton() {
this->assert_term();
ecs_assert(m_term->id || m_term->first.id, ECS_INVALID_PARAMETER,
"no component specified for singleton");
flecs::id_t sid = m_term->id;
if (!sid) {
sid = m_term->first.id;
}
ecs_assert(sid != 0, ECS_INVALID_PARAMETER, NULL);
if (!ECS_IS_PAIR(sid)) {
m_term->src.id = sid;
} else {
m_term->src.id = ecs_pair_first(world(), sid);
}
return *this;
}
/* Filter terms are not triggered on by observers */
Base& filter() {
m_term->src.flags |= flecs::Filter;
return *this;
}
ecs_term_t *m_term;
protected:
virtual flecs::world_t* world_v() = 0;
void set_term(ecs_term_t *term) {
m_term = term;
if (term) {
this->m_term_id = &m_term->src; // default to subject
} else {
this->m_term_id = nullptr;
}
}
private:
void assert_term() {
ecs_assert(m_term != NULL, ECS_INVALID_PARAMETER,
"no active term (call .term() first)");
}
operator Base&() {
return *static_cast<Base*>(this);
}
};
}
namespace flecs {
/** Class that describes a term.
*
* @ingroup cpp_core_filters
*/
struct term final : term_builder_i<term> {
term()
: term_builder_i<term>(&value)
, value({})
, m_world(nullptr) { value.move = true; }
term(flecs::world_t *world_ptr)
: term_builder_i<term>(&value)
, value({})
, m_world(world_ptr) { value.move = true; }
term(flecs::world_t *world_ptr, ecs_term_t t)
: term_builder_i<term>(&value)
, value({})
, m_world(world_ptr) {
value = t;
value.move = false;
this->set_term(&value);
}
term(flecs::world_t *world_ptr, id_t id)
: term_builder_i<term>(&value)
, value({})
, m_world(world_ptr) {
if (id & ECS_ID_FLAGS_MASK) {
value.id = id;
} else {
value.first.id = id;
}
value.move = false;
this->set_term(&value);
}
term(flecs::world_t *world_ptr, entity_t r, entity_t o)
: term_builder_i<term>(&value)
, value({})
, m_world(world_ptr) {
value.id = ecs_pair(r, o);
value.move = false;
this->set_term(&value);
}
term(id_t id)
: term_builder_i<term>(&value)
, value({})
, m_world(nullptr) {
if (id & ECS_ID_FLAGS_MASK) {
value.id = id;
} else {
value.first.id = id;
}
value.move = true;
}
term(id_t r, id_t o)
: term_builder_i<term>(&value)
, value({})
, m_world(nullptr) {
value.id = ecs_pair(r, o);
value.move = true;
}
term(const term& t) : term_builder_i<term>(&value) {
m_world = t.m_world;
value = ecs_term_copy(&t.value);
this->set_term(&value);
}
term(term&& t) noexcept : term_builder_i<term>(&value) {
m_world = t.m_world;
value = ecs_term_move(&t.value);
t.reset();
this->set_term(&value);
}
term& operator=(const term& t) {
ecs_assert(m_world == t.m_world, ECS_INVALID_PARAMETER, NULL);
ecs_term_fini(&value);
value = ecs_term_copy(&t.value);
this->set_term(&value);
return *this;
}
term& operator=(term&& t) noexcept {
ecs_assert(m_world == t.m_world, ECS_INVALID_PARAMETER, NULL);
ecs_term_fini(&value);
value = t.value;
this->set_term(&value);
t.reset();
return *this;
}
~term() {
ecs_term_fini(&value);
}
void reset() {
value = {};
this->set_term(nullptr);
}
int finalize() {
return ecs_term_finalize(m_world, &value);
}
bool is_set() {
return ecs_term_is_initialized(&value);
}
flecs::id id() {
return flecs::id(m_world, value.id);
}
flecs::inout_kind_t inout() {
return static_cast<flecs::inout_kind_t>(value.inout);
}
flecs::oper_kind_t oper() {
return static_cast<flecs::oper_kind_t>(value.oper);
}
flecs::entity get_src() {
return flecs::entity(m_world, value.src.id);
}
flecs::entity get_first() {
return flecs::entity(m_world, value.first.id);
}
flecs::entity get_second() {
return flecs::entity(m_world, value.second.id);
}
ecs_term_t move() { /* explicit move to ecs_term_t */
return ecs_term_move(&value);
}
ecs_term_t value;
protected:
flecs::world_t* world_v() override { return m_world; }
private:
flecs::world_t *m_world;
};
// Term mixin implementation
template <typename... Args>
inline flecs::term world::term(Args &&... args) const {
return flecs::term(m_world, FLECS_FWD(args)...);
}
template <typename T>
inline flecs::term world::term() const {
return flecs::term(m_world, _::cpp_type<T>::id(m_world));
}
template <typename First, typename Second>
inline flecs::term world::term() const {
return flecs::term(m_world, ecs_pair(
_::cpp_type<First>::id(m_world),
_::cpp_type<Second>::id(m_world)));
}
}
/**
* @file addons/cpp/mixins/filter/impl.hpp
* @brief Filter implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/filter/builder.hpp
* @brief Filter builder.
*/
#pragma once
/**
* @file addons/cpp/utils/builder.hpp
* @brief Builder base class.
*
* Generic functionality for builder classes.
*/
#pragma once
namespace flecs {
namespace _ {
// Macros for template types so we don't go cross-eyed
#define FLECS_TBUILDER template<typename ... Components> class
#define FLECS_IBUILDER template<typename IBase, typename ... Components> class
template<FLECS_TBUILDER T, typename TDesc, typename Base, FLECS_IBUILDER IBuilder, typename ... Components>
struct builder : IBuilder<Base, Components ...>
{
using IBase = IBuilder<Base, Components ...>;
public:
builder(flecs::world_t *world)
: IBase(&m_desc)
, m_desc{}
, m_world(world) { }
builder(const builder& f)
: IBase(&m_desc, f.m_term_index)
{
m_world = f.m_world;
m_desc = f.m_desc;
}
builder(builder&& f) noexcept
: builder<T, TDesc, Base, IBuilder, Components...>(f) { }
operator TDesc*() {
return &m_desc;
}
T<Components ...> build() {
return T<Components...>(m_world, *static_cast<Base*>(this));
}
protected:
flecs::world_t* world_v() override { return m_world; }
TDesc m_desc;
flecs::world_t *m_world;
};
#undef FLECS_TBUILDER
#undef FLECS_IBUILDER
} // namespace _
} // namespace flecs
/**
* @file addons/cpp/mixins/filter/builder_i.hpp
* @brief Filter builder interface.
*/
#pragma once
namespace flecs
{
/** Filter builder interface.
*
* @ingroup cpp_core_filters
*/
template<typename Base, typename ... Components>
struct filter_builder_i : term_builder_i<Base> {
filter_builder_i(ecs_filter_desc_t *desc, int32_t term_index = 0)
: m_term_index(term_index)
, m_expr_count(0)
, m_desc(desc) { }
Base& instanced() {
m_desc->instanced = true;
return *this;
}
Base& filter_flags(ecs_flags32_t flags) {
m_desc->flags |= flags;
return *this;
}
Base& expr(const char *expr) {
ecs_check(m_expr_count == 0, ECS_INVALID_OPERATION,
"filter_builder::expr() called more than once");
m_desc->expr = expr;
m_expr_count ++;
error:
return *this;
}
/* With/without shorthand notation. */
template <typename ... Args>
Base& with(Args&&... args) {
return this->term(FLECS_FWD(args)...).inout_none();
}
template <typename T, typename ... Args>
Base& with(Args&&... args) {
return this->term<T>(FLECS_FWD(args)...).inout_none();
}
template <typename First, typename Second>
Base& with() {
return this->term<First, Second>().inout_none();
}
template <typename ... Args>
Base& without(Args&&... args) {
return this->term(FLECS_FWD(args)...).not_();
}
template <typename T, typename ... Args>
Base& without(Args&&... args) {
return this->term<T>(FLECS_FWD(args)...).not_();
}
template <typename First, typename Second>
Base& without() {
return this->term<First, Second>().not_();
}
/* Write/read shorthand notation */
Base& write() {
term_builder_i<Base>::write();
return *this;
}
template <typename ... Args>
Base& write(Args&&... args) {
return this->term(FLECS_FWD(args)...).write();
}
template <typename T, typename ... Args>
Base& write(Args&&... args) {
return this->term<T>(FLECS_FWD(args)...).write();
}
template <typename First, typename Second>
Base& write() {
return this->term<First, Second>().write();
}
Base& read() {
term_builder_i<Base>::read();
return *this;
}
template <typename ... Args>
Base& read(Args&&... args) {
return this->term(FLECS_FWD(args)...).read();
}
template <typename T, typename ... Args>
Base& read(Args&&... args) {
return this->term<T>(FLECS_FWD(args)...).read();
}
template <typename First, typename Second>
Base& read() {
return this->term<First, Second>().read();
}
/* Scope_open/scope_close shorthand notation. */
Base& scope_open() {
return this->with(flecs::ScopeOpen).entity(0);
}
Base& scope_close() {
return this->with(flecs::ScopeClose).entity(0);
}
/* Term notation for more complex query features */
Base& term() {
if (this->m_term) {
ecs_check(ecs_term_is_initialized(this->m_term),
ECS_INVALID_OPERATION,
"filter_builder::term() called without initializing term");
}
if (m_term_index >= FLECS_TERM_DESC_MAX) {
if (m_term_index == FLECS_TERM_DESC_MAX) {
m_desc->terms_buffer = ecs_os_calloc_n(
ecs_term_t, m_term_index + 1);
ecs_os_memcpy_n(m_desc->terms_buffer, m_desc->terms,
ecs_term_t, m_term_index);
ecs_os_memset_n(m_desc->terms, 0,
ecs_term_t, FLECS_TERM_DESC_MAX);
} else {
m_desc->terms_buffer = ecs_os_realloc_n(m_desc->terms_buffer,
ecs_term_t, m_term_index + 1);
}
m_desc->terms_buffer_count = m_term_index + 1;
this->set_term(&m_desc->terms_buffer[m_term_index]);
} else {
this->set_term(&m_desc->terms[m_term_index]);
}
m_term_index ++;
error:
return *this;
}
Base& term_at(int32_t term_index) {
ecs_assert(term_index > 0, ECS_INVALID_PARAMETER, NULL);
int32_t prev_index = m_term_index;
m_term_index = term_index - 1;
this->term();
m_term_index = prev_index;
ecs_assert(ecs_term_is_initialized(this->m_term),
ECS_INVALID_PARAMETER, NULL);
return *this;
}
Base& arg(int32_t term_index) {
return this->term_at(term_index);
}
template<typename T>
Base& term() {
this->term();
*this->m_term = flecs::term(_::cpp_type<T>::id(this->world_v())).move();
this->m_term->inout = static_cast<ecs_inout_kind_t>(
_::type_to_inout<T>());
return *this;
}
Base& term(id_t id) {
this->term();
*this->m_term = flecs::term(id).move();
return *this;
}
Base& term(const char *name) {
this->term();
*this->m_term = flecs::term().first(name).move();
return *this;
}
Base& term(const char *first, const char *second) {
this->term();
*this->m_term = flecs::term().first(first).second(second).move();
return *this;
}
Base& term(entity_t r, entity_t o) {
this->term();
*this->m_term = flecs::term(r, o).move();
return *this;
}
Base& term(entity_t r, const char *o) {
this->term();
*this->m_term = flecs::term(r).second(o).move();
return *this;
}
template<typename First>
Base& term(id_t o) {
return this->term(_::cpp_type<First>::id(this->world_v()), o);
}
template<typename First>
Base& term(const char *second) {
return this->term(_::cpp_type<First>::id(this->world_v())).second(second);
}
template<typename First, typename Second>
Base& term() {
return this->term<First>(_::cpp_type<Second>::id(this->world_v()));
}
template <typename E, if_t< is_enum<E>::value > = 0>
Base& term(E value) {
flecs::entity_t r = _::cpp_type<E>::id(this->world_v());
auto o = enum_type<E>(this->world_v()).entity(value);
return this->term(r, o);
}
Base& term(flecs::term& term) {
this->term();
*this->m_term = term.move();
return *this;
}
Base& term(flecs::term&& term) {
this->term();
*this->m_term = term.move();
return *this;
}
protected:
virtual flecs::world_t* world_v() = 0;
int32_t m_term_index;
int32_t m_expr_count;
private:
operator Base&() {
return *static_cast<Base*>(this);
}
ecs_filter_desc_t *m_desc;
};
}
namespace flecs {
namespace _ {
template <typename ... Components>
using filter_builder_base = builder<
filter, ecs_filter_desc_t, filter_builder<Components...>,
filter_builder_i, Components ...>;
}
/** Filter builder.
*
* @ingroup cpp_core_filters
*/
template <typename ... Components>
struct filter_builder final : _::filter_builder_base<Components...> {
filter_builder(flecs::world_t* world, const char *name = nullptr)
: _::filter_builder_base<Components...>(world)
{
_::sig<Components...>(world).populate(this);
if (name != nullptr) {
ecs_entity_desc_t entity_desc = {};
entity_desc.name = name;
entity_desc.sep = "::";
entity_desc.root_sep = "::";
this->m_desc.entity = ecs_entity_init(world, &entity_desc);
}
}
template <typename Func>
void each(Func&& func) {
this->build().each(FLECS_FWD(func));
}
};
}
namespace flecs
{
struct filter_base {
filter_base()
: m_world(nullptr)
, m_filter({})
, m_filter_ptr(nullptr) { }
filter_base(world_t *world, const ecs_filter_t *filter)
: m_world(world)
, m_filter({})
, m_filter_ptr(filter) { }
filter_base(world_t *world, ecs_filter_t *filter)
: m_world(world)
, m_filter_ptr(&m_filter) {
ecs_filter_move(&m_filter, filter);
}
filter_base(world_t *world, ecs_filter_desc_t *desc)
: m_world(world)
{
desc->storage = &m_filter;
if (ecs_filter_init(world, desc) == NULL) {
ecs_abort(ECS_INVALID_PARAMETER, NULL);
}
if (desc->terms_buffer) {
ecs_os_free(desc->terms_buffer);
}
m_filter_ptr = &m_filter;
}
filter_base(const filter_base& obj) {
this->m_world = obj.m_world;
if (obj.m_filter_ptr) {
this->m_filter_ptr = &this->m_filter;
} else {
this->m_filter_ptr = nullptr;
}
ecs_filter_copy(&m_filter, &obj.m_filter);
}
filter_base& operator=(const filter_base& obj) {
this->m_world = obj.m_world;
if (obj.m_filter_ptr) {
this->m_filter_ptr = &this->m_filter;
} else {
this->m_filter_ptr = nullptr;
}
ecs_filter_copy(&m_filter, &obj.m_filter);
return *this;
}
filter_base(filter_base&& obj) noexcept {
this->m_world = obj.m_world;
if (obj.m_filter_ptr) {
this->m_filter_ptr = &this->m_filter;
} else {
this->m_filter_ptr = nullptr;
}
ecs_filter_move(&m_filter, &obj.m_filter);
}
filter_base& operator=(filter_base&& obj) noexcept {
this->m_world = obj.m_world;
if (obj.m_filter_ptr) {
this->m_filter_ptr = &this->m_filter;
} else {
this->m_filter_ptr = nullptr;
}
ecs_filter_move(&m_filter, &obj.m_filter);
return *this;
}
flecs::entity entity() {
return flecs::entity(m_world, ecs_get_entity(m_filter_ptr));
}
operator const flecs::filter_t*() const {
return m_filter_ptr;
}
/** Free the filter.
*/
~filter_base() {
if ((&m_filter == m_filter_ptr) && m_filter_ptr) {
ecs_filter_fini(&m_filter);
}
}
template <typename Func>
void each_term(const Func& func) {
for (int i = 0; i < m_filter_ptr->term_count; i ++) {
flecs::term t(m_world, m_filter_ptr->terms[i]);
func(t);
t.reset(); // prevent freeing resources
}
}
flecs::term term(int32_t index) {
return flecs::term(m_world, m_filter_ptr->terms[index]);
}
int32_t field_count() {
return m_filter_ptr->term_count;
}
flecs::string str() {
char *result = ecs_filter_str(m_world, m_filter_ptr);
return flecs::string(result);
}
operator filter<>() const;
protected:
world_t *m_world = nullptr;
filter_t m_filter = ECS_FILTER_INIT;
const filter_t *m_filter_ptr;
};
template<typename ... Components>
struct filter : filter_base, iterable<Components...> {
private:
using Terms = typename _::term_ptrs<Components...>::array;
public:
using filter_base::filter_base;
filter() : filter_base() { } // necessary not to confuse msvc
filter(const filter& obj) : filter_base(obj) { }
filter& operator=(const filter& obj) {
filter_base::operator=(obj);
return *this;
}
filter(filter&& obj) noexcept : filter_base(FLECS_MOV(obj)) { }
filter& operator=(filter&& obj) noexcept {
filter_base::operator=(FLECS_FWD(obj));
return *this;
}
private:
ecs_iter_t get_iter(flecs::world_t *world) const override {
if (!world) {
world = m_world;
}
return ecs_filter_iter(world, m_filter_ptr);
}
ecs_iter_next_action_t next_action() const override {
return ecs_filter_next;
}
ecs_iter_next_action_t next_each_action() const override {
return ecs_filter_next_instanced;
}
};
// World mixin implementation
template <typename... Comps, typename... Args>
inline flecs::filter<Comps...> world::filter(Args &&... args) const {
return flecs::filter_builder<Comps...>(m_world, FLECS_FWD(args)...)
.build();
}
template <typename... Comps, typename... Args>
inline flecs::filter_builder<Comps...> world::filter_builder(Args &&... args) const {
return flecs::filter_builder<Comps...>(m_world, FLECS_FWD(args)...);
}
// world::each
namespace _ {
// Each with entity parameter
template<typename Func, typename ... Args>
struct filter_delegate_w_ent;
template<typename Func, typename E, typename ... Args>
struct filter_delegate_w_ent<Func, arg_list<E, Args ...> >
{
filter_delegate_w_ent(const flecs::world& world, Func&& func) {
auto f = world.filter<Args ...>();
f.each(FLECS_MOV(func));
}
};
// Each without entity parameter
template<typename Func, typename ... Args>
struct filter_delegate_no_ent;
template<typename Func, typename ... Args>
struct filter_delegate_no_ent<Func, arg_list<Args ...> >
{
filter_delegate_no_ent(const flecs::world& world, Func&& func) {
auto f = world.filter<Args ...>();
f.each(FLECS_MOV(func));
}
};
// Switch between function with & without entity parameter
template<typename Func, typename T = int>
struct filter_delegate;
template <typename Func>
struct filter_delegate<Func, if_t<is_same<first_arg_t<Func>, flecs::entity>::value> > {
filter_delegate(const flecs::world& world, Func&& func) {
filter_delegate_w_ent<Func, arg_list_t<Func>>(world, FLECS_MOV(func));
}
};
template <typename Func>
struct filter_delegate<Func, if_not_t<is_same<first_arg_t<Func>, flecs::entity>::value> > {
filter_delegate(const flecs::world& world, Func&& func) {
filter_delegate_no_ent<Func, arg_list_t<Func>>(world, FLECS_MOV(func));
}
};
}
template <typename Func>
inline void world::each(Func&& func) const {
_::filter_delegate<Func> f_delegate(*this, FLECS_MOV(func));
}
template <typename T, typename Func>
inline void world::each(Func&& func) const {
ecs_term_t t = {};
t.id = _::cpp_type<T>::id();
ecs_iter_t it = ecs_term_iter(m_world, &t);
while (ecs_term_next(&it)) {
_::each_delegate<Func, T>(func).invoke(&it);
}
}
template <typename Func>
inline void world::each(flecs::id_t term_id, Func&& func) const {
ecs_term_t t = {};
t.id = term_id;
ecs_iter_t it = ecs_term_iter(m_world, &t);
while (ecs_term_next(&it)) {
_::each_delegate<Func>(func).invoke(&it);
}
}
// filter_base implementation
inline filter_base::operator flecs::filter<> () const {
flecs::filter<> f;
ecs_filter_copy(&f.m_filter, &this->m_filter);
f.m_filter_ptr = &f.m_filter;
f.m_world = this->m_world;
return f;
}
}
/**
* @file addons/cpp/mixins/query/impl.hpp
* @brief Query implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/query/builder.hpp
* @brief Query builder.
*/
#pragma once
/**
* @file addons/cpp/mixins/query/builder_i.hpp
* @brief Query builder interface.
*/
#pragma once
namespace flecs {
/** Query builder interface.
*
* @ingroup cpp_core_queries
*/
template<typename Base, typename ... Components>
struct query_builder_i : filter_builder_i<Base, Components ...> {
private:
using BaseClass = filter_builder_i<Base, Components ...>;
public:
query_builder_i()
: BaseClass(nullptr)
, m_desc(nullptr) { }
query_builder_i(ecs_query_desc_t *desc, int32_t term_index = 0)
: BaseClass(&desc->filter, term_index)
, m_desc(desc) { }
/** Sort the output of a query.
* This enables sorting of entities across matched tables. As a result of this
* operation, the order of entities in the matched tables may be changed.
* Resorting happens when a query iterator is obtained, and only if the table
* data has changed.
*
* If multiple queries that match the same (down)set of tables specify different
* sorting functions, resorting is likely to happen every time an iterator is
* obtained, which can significantly slow down iterations.
*
* The sorting function will be applied to the specified component. Resorting
* only happens if that component has changed, or when the entity order in the
* table has changed. If no component is provided, resorting only happens when
* the entity order changes.
*
* @tparam T The component used to sort.
* @param compare The compare function used to sort the components.
*/
template <typename T>
Base& order_by(int(*compare)(flecs::entity_t, const T*, flecs::entity_t, const T*)) {
ecs_order_by_action_t cmp = reinterpret_cast<ecs_order_by_action_t>(compare);
return this->order_by(_::cpp_type<T>::id(this->world_v()), cmp);
}
/** Sort the output of a query.
* Same as order_by<T>, but with component identifier.
*
* @param component The component used to sort.
* @param compare The compare function used to sort the components.
*/
Base& order_by(flecs::entity_t component, int(*compare)(flecs::entity_t, const void*, flecs::entity_t, const void*)) {
m_desc->order_by = reinterpret_cast<ecs_order_by_action_t>(compare);
m_desc->order_by_component = component;
return *this;
}
/** Group and sort matched tables.
* Similar to ecs_query_order_by(), but instead of sorting individual entities, this
* operation only sorts matched tables. This can be useful of a query needs to
* enforce a certain iteration order upon the tables it is iterating, for
* example by giving a certain component or tag a higher priority.
*
* The sorting function assigns a "rank" to each type, which is then used to
* sort the tables. Tables with higher ranks will appear later in the iteration.
*
* Resorting happens when a query iterator is obtained, and only if the set of
* matched tables for a query has changed. If table sorting is enabled together
* with entity sorting, table sorting takes precedence, and entities will be
* sorted within each set of tables that are assigned the same rank.
*
* @tparam T The component used to determine the group rank.
* @param group_by_action Callback that determines group id for table.
*/
template <typename T>
Base& group_by(uint64_t(*group_by_action)(flecs::world_t*, flecs::table_t *table, flecs::id_t id, void* ctx)) {
ecs_group_by_action_t action = reinterpret_cast<ecs_group_by_action_t>(group_by_action);
return this->group_by(_::cpp_type<T>::id(this->world_v()), action);
}
/** Group and sort matched tables.
* Same as group_by<T>, but with component identifier.
*
* @param component The component used to determine the group rank.
* @param group_by_action Callback that determines group id for table.
*/
Base& group_by(flecs::entity_t component, uint64_t(*group_by_action)(flecs::world_t*, flecs::table_t *table, flecs::id_t id, void* ctx)) {
m_desc->group_by = reinterpret_cast<ecs_group_by_action_t>(group_by_action);
m_desc->group_by_id = component;
return *this;
}
/** Group and sort matched tables.
* Same as group_by<T>, but with default group_by action.
*
* @tparam T The component used to determine the group rank.
*/
template <typename T>
Base& group_by() {
return this->group_by(_::cpp_type<T>::id(this->world_v()), nullptr);
}
/** Group and sort matched tables.
* Same as group_by, but with default group_by action.
*
* @param component The component used to determine the group rank.
*/
Base& group_by(flecs::entity_t component) {
return this->group_by(component, nullptr);
}
/** Specify context to be passed to group_by function.
*
* @param ctx Context to pass to group_by function.
* @param ctx_free Function to cleanup context (called when query is deleted).
*/
Base& group_by_ctx(void *ctx, ecs_ctx_free_t ctx_free = nullptr) {
m_desc->group_by_ctx = ctx;
m_desc->group_by_ctx_free = ctx_free;
return *this;
}
/** Specify on_group_create action.
*/
Base& on_group_create(ecs_group_create_action_t action) {
m_desc->on_group_create = action;
return *this;
}
/** Specify on_group_delete action.
*/
Base& on_group_delete(ecs_group_delete_action_t action) {
m_desc->on_group_delete = action;
return *this;
}
/** Specify parent query (creates subquery) */
Base& observable(const query_base& parent);
protected:
virtual flecs::world_t* world_v() = 0;
private:
operator Base&() {
return *static_cast<Base*>(this);
}
ecs_query_desc_t *m_desc;
};
}
namespace flecs {
namespace _ {
template <typename ... Components>
using query_builder_base = builder<
query, ecs_query_desc_t, query_builder<Components...>,
query_builder_i, Components ...>;
}
/** Query builder.
*
* @ingroup cpp_core_queries
*/
template <typename ... Components>
struct query_builder final : _::query_builder_base<Components...> {
query_builder(flecs::world_t* world, const char *name = nullptr)
: _::query_builder_base<Components...>(world)
{
_::sig<Components...>(world).populate(this);
if (name != nullptr) {
ecs_entity_desc_t entity_desc = {};
entity_desc.name = name;
entity_desc.sep = "::";
entity_desc.root_sep = "::";
this->m_desc.filter.entity = ecs_entity_init(world, &entity_desc);
}
}
};
}
namespace flecs {
////////////////////////////////////////////////////////////////////////////////
//// Persistent queries
////////////////////////////////////////////////////////////////////////////////
struct query_base {
query_base()
: m_world(nullptr)
, m_query(nullptr) { }
query_base(world_t *world, query_t *query = nullptr)
: m_world(world)
, m_query(query) { }
query_base(world_t *world, ecs_query_desc_t *desc)
: m_world(world)
{
m_query = ecs_query_init(world, desc);
if (!m_query) {
ecs_abort(ECS_INVALID_PARAMETER, NULL);
}
if (desc->filter.terms_buffer) {
ecs_os_free(desc->filter.terms_buffer);
}
}
operator query_t*() const {
return m_query;
}
/** Returns whether the query data changed since the last iteration.
* This operation must be invoked before obtaining the iterator, as this will
* reset the changed state. The operation will return true after:
* - new entities have been matched with
* - matched entities were deleted
* - matched components were changed
*
* @return true if entities changed, otherwise false.
*/
bool changed() const {
return ecs_query_changed(m_query, 0);
}
/** Returns whether query is orphaned.
* When the parent query of a subquery is deleted, it is left in an orphaned
* state. The only valid operation on an orphaned query is deleting it. Only
* subqueries can be orphaned.
*
* @return true if query is orphaned, otherwise false.
*/
bool orphaned() const {
return ecs_query_orphaned(m_query);
}
/** Get info for group.
*
* @param group_id The group id for which to retrieve the info.
* @return The group info.
*/
const flecs::query_group_info_t* group_info(uint64_t group_id) const {
return ecs_query_get_group_info(m_query, group_id);
}
/** Get context for group.
*
* @param group_id The group id for which to retrieve the context.
* @return The group context.
*/
void* group_ctx(uint64_t group_id) const {
const flecs::query_group_info_t *gi = group_info(group_id);
if (gi) {
return gi->ctx;
} else {
return NULL;
}
}
/** Free the query.
*/
void destruct() {
ecs_query_fini(m_query);
m_world = nullptr;
m_query = nullptr;
}
template <typename Func>
void each_term(const Func& func) const {
this->filter().each_term(func);
}
filter_base filter() const {
return filter_base(m_world, ecs_query_get_filter(m_query));
}
flecs::term term(int32_t index) const {
const ecs_filter_t *f = ecs_query_get_filter(m_query);
ecs_assert(f != NULL, ECS_INVALID_PARAMETER, NULL);
return flecs::term(m_world, f->terms[index]);
}
int32_t field_count() const {
const ecs_filter_t *f = ecs_query_get_filter(m_query);
return f->term_count;
}
flecs::string str() const {
const ecs_filter_t *f = ecs_query_get_filter(m_query);
char *result = ecs_filter_str(m_world, f);
return flecs::string(result);
}
flecs::entity entity() const {
return flecs::entity(m_world, ecs_get_entity(m_query));
}
operator query<>() const;
protected:
world_t *m_world;
query_t *m_query;
};
template<typename ... Components>
struct query final : query_base, iterable<Components...> {
public:
flecs::world world() const {
return flecs::world(m_world);
}
private:
using Terms = typename _::term_ptrs<Components...>::array;
ecs_iter_t get_iter(flecs::world_t *world) const override {
if (!world) {
world = m_world;
}
return ecs_query_iter(world, m_query);
}
ecs_iter_next_action_t next_action() const override {
return ecs_query_next;
}
ecs_iter_next_action_t next_each_action() const override {
return ecs_query_next_instanced;
}
public:
using query_base::query_base;
};
// Mixin implementation
template <typename... Comps, typename... Args>
inline flecs::query<Comps...> world::query(Args &&... args) const {
return flecs::query_builder<Comps...>(m_world, FLECS_FWD(args)...)
.build();
}
template <typename... Comps, typename... Args>
inline flecs::query_builder<Comps...> world::query_builder(Args &&... args) const {
return flecs::query_builder<Comps...>(m_world, FLECS_FWD(args)...);
}
// Builder implementation
template <typename Base, typename ... Components>
inline Base& query_builder_i<Base, Components ...>::observable(const query_base& parent) {
m_desc->parent = parent;
return *static_cast<Base*>(this);
}
// query_base implementation
inline query_base::operator query<>() const {
return flecs::query<>(m_world, m_query);
}
} // namespace flecs
/**
* @file addons/cpp/mixins/observer/impl.hpp
* @brief Observer implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/observer/builder.hpp
* @brief Observer builder.
*/
#pragma once
/**
* @file addons/cpp/utils/node_builder.hpp
* @brief Base builder class for node objects, like systems, observers.
*/
#pragma once
namespace flecs {
namespace _ {
// Macros for template types so we don't go cross-eyed
#define FLECS_IBUILDER template<typename IBase, typename ... Components> class
template<typename T, typename TDesc, typename Base, FLECS_IBUILDER IBuilder, typename ... Components>
struct node_builder : IBuilder<Base, Components ...>
{
using IBase = IBuilder<Base, Components ...>;
public:
explicit node_builder(flecs::world_t* world, const char *name = nullptr)
: IBase(&m_desc)
, m_desc{}
, m_world(world)
, m_instanced(false)
{
ecs_entity_desc_t entity_desc = {};
entity_desc.name = name;
entity_desc.sep = "::";
entity_desc.root_sep = "::";
m_desc.entity = ecs_entity_init(m_world, &entity_desc);
}
/* Iter (or each) is mandatory and always the last thing that
* is added in the fluent method chain. Create system signature from both
* template parameters and anything provided by the signature method. */
template <typename Func>
T iter(Func&& func) {
using Delegate = typename _::iter_delegate<
typename std::decay<Func>::type, Components...>;
return build<Delegate>(FLECS_FWD(func));
}
/* Each is similar to action, but accepts a function that operates on a
* single entity */
template <typename Func>
T each(Func&& func) {
using Delegate = typename _::each_delegate<
typename std::decay<Func>::type, Components...>;
m_instanced = true;
return build<Delegate>(FLECS_FWD(func));
}
protected:
flecs::world_t* world_v() override { return m_world; }
TDesc m_desc;
flecs::world_t *m_world;
bool m_instanced;
private:
template <typename Delegate, typename Func>
T build(Func&& func) {
auto ctx = FLECS_NEW(Delegate)(FLECS_FWD(func));
m_desc.callback = Delegate::run;
m_desc.binding_ctx = ctx;
m_desc.binding_ctx_free = reinterpret_cast<
ecs_ctx_free_t>(_::free_obj<Delegate>);
return T(m_world, &m_desc, m_instanced);
}
};
#undef FLECS_IBUILDER
} // namespace _
} // namespace flecs
/**
* @file addons/cpp/mixins/observer/builder_i.hpp
* @brief Observer builder interface.
*/
#pragma once
namespace flecs {
/** Observer builder interface.
*
* @ingroup cpp_observers
*/
template<typename Base, typename ... Components>
struct observer_builder_i : filter_builder_i<Base, Components ...> {
using BaseClass = filter_builder_i<Base, Components ...>;
observer_builder_i()
: BaseClass(nullptr)
, m_desc(nullptr)
, m_event_count(0) { }
observer_builder_i(ecs_observer_desc_t *desc)
: BaseClass(&desc->filter)
, m_desc(desc)
, m_event_count(0) { }
/** Specify the event(s) for when the observer should run.
* @param evt The event.
*/
Base& event(entity_t evt) {
m_desc->events[m_event_count ++] = evt;
return *this;
}
/** Specify the event(s) for when the observer should run.
* @tparam E The event.
*/
template <typename E>
Base& event() {
m_desc->events[m_event_count ++] = _::cpp_type<E>().id(world_v());
return *this;
}
/** Invoke observer for anything that matches its filter on creation */
Base& yield_existing(bool value = true) {
m_desc->yield_existing = value;
return *this;
}
/** Set observer context */
Base& ctx(void *ptr) {
m_desc->ctx = ptr;
return *this;
}
/** Set observer run callback */
Base& run(ecs_iter_action_t action) {
m_desc->run = action;
return *this;
}
protected:
virtual flecs::world_t* world_v() = 0;
private:
operator Base&() {
return *static_cast<Base*>(this);
}
ecs_observer_desc_t *m_desc;
int32_t m_event_count;
};
}
namespace flecs {
namespace _ {
template <typename ... Components>
using observer_builder_base = node_builder<
observer, ecs_observer_desc_t, observer_builder<Components...>,
observer_builder_i, Components ...>;
}
/** Observer builder.
*
* @ingroup cpp_observers
*/
template <typename ... Components>
struct observer_builder final : _::observer_builder_base<Components...> {
observer_builder(flecs::world_t* world, const char *name = nullptr)
: _::observer_builder_base<Components...>(world, name)
{
_::sig<Components...>(world).populate(this);
}
};
}
namespace flecs
{
struct observer final : entity
{
using entity::entity;
explicit observer() : entity() { }
observer(flecs::world_t *world, ecs_observer_desc_t *desc, bool instanced)
{
if (!desc->filter.instanced) {
desc->filter.instanced = instanced;
}
m_world = world;
m_id = ecs_observer_init(world, desc);
if (desc->filter.terms_buffer) {
ecs_os_free(desc->filter.terms_buffer);
}
}
void ctx(void *ctx) {
ecs_observer_desc_t desc = {};
desc.entity = m_id;
desc.ctx = ctx;
ecs_observer_init(m_world, &desc);
}
void* ctx() const {
return ecs_observer_get_ctx(m_world, m_id);
}
flecs::filter<> query() const {
const flecs::Poly *poly = this->get<flecs::Poly>(flecs::Observer);
const ecs_observer_t *ob = static_cast<const flecs::observer_t*>(poly->poly);
return flecs::filter<>(m_world, &ob->filter);
}
};
// Mixin implementation
inline observer world::observer(flecs::entity e) const {
return flecs::observer(m_world, e);
}
template <typename... Comps, typename... Args>
inline observer_builder<Comps...> world::observer(Args &&... args) const {
return flecs::observer_builder<Comps...>(m_world, FLECS_FWD(args)...);
}
} // namespace flecs
/**
* @file addons/cpp/mixins/event/impl.hpp
* @brief Event implementation.
*/
#pragma once
namespace flecs
{
// Mixin implementation
inline flecs::event_builder world::event(flecs::entity_t evt) const {
return flecs::event_builder(m_world, evt);
}
template <typename E>
inline flecs::event_builder_typed<E> world::event() const {
return flecs::event_builder_typed<E>(m_world, _::cpp_type<E>().id(m_world));
}
namespace _ {
inline void entity_observer_create(
flecs::world_t *world,
flecs::entity_t event,
flecs::entity_t entity,
ecs_iter_action_t callback,
void *binding_ctx,
ecs_ctx_free_t binding_ctx_free)
{
ecs_observer_desc_t desc = {};
desc.events[0] = event;
desc.filter.terms[0].id = EcsAny;
desc.filter.terms[0].src.id = entity;
desc.callback = callback;
desc.binding_ctx = binding_ctx;
desc.binding_ctx_free = binding_ctx_free;
flecs::entity_t o = ecs_observer_init(world, &desc);
ecs_add_pair(world, o, EcsChildOf, entity);
}
template <typename Func>
struct entity_observer_factory {
template <typename Evt, if_t<is_empty<Evt>::value> = 0>
static void create(
flecs::world_t *world,
flecs::entity_t entity,
Func&& f)
{
using Delegate = _::entity_observer_delegate<Func>;
auto ctx = FLECS_NEW(Delegate)(FLECS_FWD(f));
entity_observer_create(world, _::cpp_type<Evt>::id(world), entity, Delegate::run, ctx,
reinterpret_cast<ecs_ctx_free_t>(_::free_obj<Delegate>));
}
template <typename Evt, if_not_t<is_empty<Evt>::value> = 0>
static void create(
flecs::world_t *world,
flecs::entity_t entity,
Func&& f)
{
using Delegate = _::entity_payload_observer_delegate<Func, Evt>;
auto ctx = FLECS_NEW(Delegate)(FLECS_FWD(f));
entity_observer_create(world, _::cpp_type<Evt>::id(world), entity, Delegate::run, ctx,
reinterpret_cast<ecs_ctx_free_t>(_::free_obj<Delegate>));
}
};
}
template <typename Self>
template <typename Func>
inline Self& entity_builder<Self>::observe(flecs::entity_t evt, Func&& f) {
using Delegate = _::entity_observer_delegate<Func>;
auto ctx = FLECS_NEW(Delegate)(FLECS_FWD(f));
_::entity_observer_create(m_world, evt, m_id, Delegate::run, ctx,
reinterpret_cast<ecs_ctx_free_t>(_::free_obj<Delegate>));
return to_base();
}
template <typename Self>
template <typename Evt, typename Func>
inline Self& entity_builder<Self>::observe(Func&& f) {
_::entity_observer_factory<Func>::template create<Evt>(
m_world, m_id, FLECS_FWD(f));
return to_base();
}
template <typename Self>
template <typename Func>
inline Self& entity_builder<Self>::observe(Func&& f) {
return this->observe<_::event_from_func_t<Func>>(FLECS_FWD(f));
}
inline void entity_view::emit(flecs::entity evt) {
this->emit(evt.id());
}
inline void entity_view::enqueue(flecs::entity evt) {
this->enqueue(evt.id());
}
} // namespace flecs
/**
* @file addons/cpp/mixins/enum/impl.hpp
* @brief Enum implementation.
*/
#pragma once
namespace flecs {
template <typename E>
inline E entity_view::to_constant() const {
const E* ptr = this->get<E>();
ecs_assert(ptr != NULL, ECS_INVALID_PARAMETER, "entity is not a constant");
return ptr[0];
}
template <typename E, if_t< is_enum<E>::value >>
inline flecs::entity world::to_entity(E constant) const {
const auto& et = enum_type<E>(m_world);
return flecs::entity(m_world, et.entity(constant));
}
}
#ifdef FLECS_MODULE
/**
* @file addons/cpp/mixins/module/impl.hpp
* @brief Module implementation.
*/
#pragma once
namespace flecs {
namespace _ {
template <typename T>
ecs_entity_t do_import(world& world, const char *symbol) {
ecs_trace("#[magenta]import#[reset] %s", _::type_name<T>());
ecs_log_push();
ecs_entity_t scope = ecs_set_scope(world, 0);
// Initialize module component type & don't allow it to be registered as a
// tag, as this would prevent calling emplace()
auto m_c = component<T>(world, nullptr, false);
ecs_add_id(world, m_c, EcsModule);
ecs_set_scope(world, m_c);
world.emplace<T>(world);
ecs_set_scope(world, scope);
// It should now be possible to lookup the module
ecs_entity_t m = ecs_lookup_symbol(world, symbol, true, false);
ecs_assert(m != 0, ECS_MODULE_UNDEFINED, symbol);
ecs_assert(m == m_c, ECS_INTERNAL_ERROR, NULL);
ecs_log_pop();
return m;
}
template <typename T>
flecs::entity import(world& world) {
const char *symbol = _::symbol_name<T>();
ecs_entity_t m = ecs_lookup_symbol(world, symbol, true, false);
if (!_::cpp_type<T>::registered(world)) {
/* Module is registered with world, initialize static data */
if (m) {
_::cpp_type<T>::init(m, false);
/* Module is not yet registered, register it now */
} else {
m = _::do_import<T>(world, symbol);
}
/* Module has been registered, but could have been for another world. Import
* if module hasn't been registered for this world. */
} else if (!m) {
m = _::do_import<T>(world, symbol);
}
return flecs::entity(world, m);
}
}
/**
* @defgroup cpp_addons_modules Modules
* @ingroup cpp_addons
* Modules organize components, systems and more in reusable units of code.
*
* @{
*/
template <typename Module>
inline flecs::entity world::module(const char *name) const {
flecs::id_t result = _::cpp_type<Module>::id(m_world, nullptr, false);
if (name) {
ecs_add_path_w_sep(m_world, result, 0, name, "::", "::");
}
ecs_set_scope(m_world, result);
return flecs::entity(m_world, result);
}
template <typename Module>
inline flecs::entity world::import() {
return flecs::_::import<Module>(*this);
}
/** @} */
}
#endif
#ifdef FLECS_SYSTEM
/**
* @file addons/cpp/mixins/system/impl.hpp
* @brief System module implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/system/builder.hpp
* @brief System builder.
*/
#pragma once
/**
* @file addons/cpp/mixins/system/builder_i.hpp
* @brief System builder interface.
*/
#pragma once
namespace flecs
{
/** System builder interface.
*
* @ingroup cpp_addons_systems
*/
template<typename Base, typename ... Components>
struct system_builder_i : query_builder_i<Base, Components ...> {
private:
using BaseClass = query_builder_i<Base, Components ...>;
public:
system_builder_i(ecs_system_desc_t *desc)
: BaseClass(&desc->query)
, m_desc(desc) { }
/** Specify in which phase the system should run.
*
* @param phase The phase.
*/
Base& kind(entity_t phase) {
flecs::entity_t cur_phase = ecs_get_target(
world_v(), m_desc->entity, EcsDependsOn, 0);
if (cur_phase) {
ecs_remove_id(world_v(), m_desc->entity, ecs_dependson(cur_phase));
ecs_remove_id(world_v(), m_desc->entity, cur_phase);
}
if (phase) {
ecs_add_id(world_v(), m_desc->entity, ecs_dependson(phase));
ecs_add_id(world_v(), m_desc->entity, phase);
}
return *this;
}
/** Specify in which phase the system should run.
*
* @tparam Phase The phase.
*/
template <typename Phase>
Base& kind() {
return this->kind(_::cpp_type<Phase>::id(world_v()));
}
/** Specify whether system can run on multiple threads.
*
* @param value If false system will always run on a single thread.
*/
Base& multi_threaded(bool value = true) {
m_desc->multi_threaded = value;
return *this;
}
/** Specify whether system should be ran in staged context.
*
* @param value If false system will always run staged.
*/
Base& no_readonly(bool value = true) {
m_desc->no_readonly = value;
return *this;
}
/** Set system interval.
* This operation will cause the system to be ran at the specified interval.
*
* The timer is synchronous, and is incremented each frame by delta_time.
*
* @param interval The interval value.
*/
Base& interval(ecs_ftime_t interval) {
m_desc->interval = interval;
return *this;
}
/** Set system rate.
* This operation will cause the system to be ran at a multiple of the
* provided tick source. The tick source may be any entity, including
* another system.
*
* @param tick_source The tick source.
* @param rate The multiple at which to run the system.
*/
Base& rate(const entity_t tick_source, int32_t rate) {
m_desc->rate = rate;
m_desc->tick_source = tick_source;
return *this;
}
/** Set system rate.
* This operation will cause the system to be ran at a multiple of the
* frame tick frequency. If a tick source was provided, this just updates
* the rate of the system.
*
* @param rate The multiple at which to run the system.
*/
Base& rate(int32_t rate) {
m_desc->rate = rate;
return *this;
}
/** Set tick source.
* This operation sets a shared tick source for the system.
*
* @tparam T The type associated with the singleton tick source to use for the system.
*/
template<typename T>
Base& tick_source() {
m_desc->tick_source = _::cpp_type<T>::id(world_v());
return *this;
}
/** Set tick source.
* This operation sets a shared tick source for the system.
*
* @param tick_source The tick source to use for the system.
*/
Base& tick_source(flecs::entity_t tick_source) {
m_desc->tick_source = tick_source;
return *this;
}
/** Set system context */
Base& ctx(void *ptr) {
m_desc->ctx = ptr;
return *this;
}
/** Set system run callback */
Base& run(ecs_iter_action_t action) {
m_desc->run = action;
return *this;
}
protected:
virtual flecs::world_t* world_v() = 0;
private:
operator Base&() {
return *static_cast<Base*>(this);
}
ecs_system_desc_t *m_desc;
};
}
namespace flecs {
namespace _ {
template <typename ... Components>
using system_builder_base = node_builder<
system, ecs_system_desc_t, system_builder<Components...>,
system_builder_i, Components ...>;
}
/** System builder.
*
* @ingroup cpp_addons_systems
*/
template <typename ... Components>
struct system_builder final : _::system_builder_base<Components...> {
system_builder(flecs::world_t* world, const char *name = nullptr)
: _::system_builder_base<Components...>(world, name)
{
_::sig<Components...>(world).populate(this);
#ifdef FLECS_PIPELINE
ecs_add_id(world, this->m_desc.entity, ecs_dependson(flecs::OnUpdate));
ecs_add_id(world, this->m_desc.entity, flecs::OnUpdate);
#endif
}
};
}
namespace flecs
{
struct system_runner_fluent {
system_runner_fluent(
world_t *world,
entity_t id,
int32_t stage_current,
int32_t stage_count,
ecs_ftime_t delta_time,
void *param)
: m_stage(world)
, m_id(id)
, m_delta_time(delta_time)
, m_param(param)
, m_offset(0)
, m_limit(0)
, m_stage_current(stage_current)
, m_stage_count(stage_count) { }
system_runner_fluent& offset(int32_t offset) {
m_offset = offset;
return *this;
}
system_runner_fluent& limit(int32_t limit) {
m_limit = limit;
return *this;
}
system_runner_fluent& stage(flecs::world& stage) {
m_stage = stage.c_ptr();
return *this;
}
~system_runner_fluent() {
if (m_stage_count) {
ecs_run_worker(
m_stage, m_id, m_stage_current, m_stage_count, m_delta_time,
m_param);
} else {
ecs_run_w_filter(
m_stage, m_id, m_delta_time, m_offset, m_limit, m_param);
}
}
private:
world_t *m_stage;
entity_t m_id;
ecs_ftime_t m_delta_time;
void *m_param;
int32_t m_offset;
int32_t m_limit;
int32_t m_stage_current;
int32_t m_stage_count;
};
struct system final : entity
{
using entity::entity;
explicit system() {
m_id = 0;
m_world = nullptr;
}
explicit system(flecs::world_t *world, ecs_system_desc_t *desc, bool instanced)
{
if (!desc->query.filter.instanced) {
desc->query.filter.instanced = instanced;
}
m_world = world;
m_id = ecs_system_init(world, desc);
if (desc->query.filter.terms_buffer) {
ecs_os_free(desc->query.filter.terms_buffer);
}
}
void ctx(void *ctx) {
ecs_system_desc_t desc = {};
desc.entity = m_id;
desc.ctx = ctx;
ecs_system_init(m_world, &desc);
}
void* ctx() const {
return ecs_system_get_ctx(m_world, m_id);
}
flecs::query<> query() const {
return flecs::query<>(m_world, ecs_system_get_query(m_world, m_id));
}
system_runner_fluent run(ecs_ftime_t delta_time = 0.0f, void *param = nullptr) const {
return system_runner_fluent(m_world, m_id, 0, 0, delta_time, param);
}
system_runner_fluent run_worker(
int32_t stage_current,
int32_t stage_count,
ecs_ftime_t delta_time = 0.0f,
void *param = nullptr) const
{
return system_runner_fluent(
m_world, m_id, stage_current, stage_count, delta_time, param);
}
# ifdef FLECS_TIMER
/**
* @file addons/cpp/mixins/timer/system_mixin.inl
* @brief Timer module system mixin.
*/
/**
* @memberof flecs::system
* @ingroup cpp_addons_timer
*
* @{
*/
/** Set interval.
* @see ecs_set_interval
*/
void interval(ecs_ftime_t interval);
/** Get interval.
* @see ecs_get_interval.
*/
ecs_ftime_t interval();
/** Set timeout.
* @see ecs_set_timeout
*/
void timeout(ecs_ftime_t timeout);
/** Get timeout.
* @see ecs_get_timeout
*/
ecs_ftime_t timeout();
/** Set system rate (system is its own tick source).
* @see ecs_set_rate
*/
void rate(int32_t rate);
/** Start timer.
* @see ecs_start_timer
*/
void start();
/** Stop timer.
* @see ecs_start_timer
*/
void stop();
/** Set external tick source.
* @see ecs_set_tick_source
*/
template<typename T>
void set_tick_source();
/** Set external tick source.
* @see ecs_set_tick_source
*/
void set_tick_source(flecs::entity e);
/** @} */
# endif
};
// Mixin implementation
inline system world::system(flecs::entity e) const {
return flecs::system(m_world, e);
}
template <typename... Comps, typename... Args>
inline system_builder<Comps...> world::system(Args &&... args) const {
return flecs::system_builder<Comps...>(m_world, FLECS_FWD(args)...);
}
namespace _ {
inline void system_init(flecs::world& world) {
world.component<TickSource>("flecs::system::TickSource");
}
} // namespace _
} // namespace flecs
#endif
#ifdef FLECS_PIPELINE
/**
* @file addons/cpp/mixins/pipeline/impl.hpp
* @brief Pipeline module implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/pipeline/builder.hpp
* @brief Pipeline builder.
*/
#pragma once
/**
* @file addons/cpp/mixins/pipeline/builder_i.hpp
* @brief Pipeline builder interface.
*/
#pragma once
namespace flecs {
/** Pipeline builder interface.
*
* @ingroup cpp_pipelines
*/
template<typename Base>
struct pipeline_builder_i : query_builder_i<Base> {
pipeline_builder_i(ecs_pipeline_desc_t *desc, int32_t term_index = 0)
: query_builder_i<Base>(&desc->query, term_index)
, m_desc(desc) { }
private:
ecs_pipeline_desc_t *m_desc;
};
}
namespace flecs {
namespace _ {
template <typename ... Components>
using pipeline_builder_base = builder<
pipeline, ecs_pipeline_desc_t, pipeline_builder<Components...>,
pipeline_builder_i, Components ...>;
}
/** Pipeline builder.
*
* @ingroup cpp_pipelines
*/
template <typename ... Components>
struct pipeline_builder final : _::pipeline_builder_base<Components...> {
pipeline_builder(flecs::world_t* world, flecs::entity_t id = 0)
: _::pipeline_builder_base<Components...>(world)
{
_::sig<Components...>(world).populate(this);
this->m_desc.entity = id;
}
};
}
namespace flecs {
template <typename ... Components>
struct pipeline : entity {
pipeline(world_t *world, ecs_pipeline_desc_t *desc)
: entity(world)
{
m_id = ecs_pipeline_init(world, desc);
if (!m_id) {
ecs_abort(ECS_INVALID_PARAMETER, NULL);
}
if (desc->query.filter.terms_buffer) {
ecs_os_free(desc->query.filter.terms_buffer);
}
}
};
inline flecs::pipeline_builder<> world::pipeline() const {
return flecs::pipeline_builder<>(m_world);
}
template <typename Pipeline, if_not_t< is_enum<Pipeline>::value >>
inline flecs::pipeline_builder<> world::pipeline() const {
return flecs::pipeline_builder<>(m_world, _::cpp_type<Pipeline>::id(m_world));
}
inline void world::set_pipeline(const flecs::entity pip) const {
return ecs_set_pipeline(m_world, pip);
}
template <typename Pipeline>
inline void world::set_pipeline() const {
return ecs_set_pipeline(m_world, _::cpp_type<Pipeline>::id(m_world));
}
inline flecs::entity world::get_pipeline() const {
return flecs::entity(m_world, ecs_get_pipeline(m_world));
}
inline bool world::progress(ecs_ftime_t delta_time) const {
return ecs_progress(m_world, delta_time);
}
inline void world::run_pipeline(const flecs::entity_t pip, ecs_ftime_t delta_time) const {
return ecs_run_pipeline(m_world, pip, delta_time);
}
template <typename Pipeline, if_not_t< is_enum<Pipeline>::value >>
inline void world::run_pipeline(ecs_ftime_t delta_time) const {
return ecs_run_pipeline(m_world, _::cpp_type<Pipeline>::id(m_world), delta_time);
}
inline void world::set_time_scale(ecs_ftime_t mul) const {
ecs_set_time_scale(m_world, mul);
}
inline void world::set_target_fps(ecs_ftime_t target_fps) const {
ecs_set_target_fps(m_world, target_fps);
}
inline void world::reset_clock() const {
ecs_reset_clock(m_world);
}
inline void world::set_threads(int32_t threads) const {
ecs_set_threads(m_world, threads);
}
inline int32_t world::get_threads() const {
return ecs_get_stage_count(m_world);
}
inline void world::set_task_threads(int32_t task_threads) const {
ecs_set_task_threads(m_world, task_threads);
}
inline bool world::using_task_threads() const {
return ecs_using_task_threads(m_world);
}
}
#endif
#ifdef FLECS_TIMER
/**
* @file addons/cpp/mixins/timer/impl.hpp
* @brief Timer module implementation.
*/
#pragma once
namespace flecs {
// Timer class
struct timer final : entity {
using entity::entity;
timer& interval(ecs_ftime_t interval) {
ecs_set_interval(m_world, m_id, interval);
return *this;
}
ecs_ftime_t interval() {
return ecs_get_interval(m_world, m_id);
}
timer& timeout(ecs_ftime_t timeout) {
ecs_set_timeout(m_world, m_id, timeout);
return *this;
}
ecs_ftime_t timeout() {
return ecs_get_timeout(m_world, m_id);
}
timer& rate(int32_t rate, flecs::entity_t tick_source = 0) {
ecs_set_rate(m_world, m_id, rate, tick_source);
return *this;
}
void start() {
ecs_start_timer(m_world, m_id);
}
void stop() {
ecs_stop_timer(m_world, m_id);
}
};
template <typename T>
inline flecs::timer world::timer() const {
return flecs::timer(m_world, _::cpp_type<T>::id(m_world));
}
template <typename... Args>
inline flecs::timer world::timer(Args &&... args) const {
return flecs::timer(m_world, FLECS_FWD(args)...);
}
inline void world::randomize_timers() const {
ecs_randomize_timers(m_world);
}
inline void system::interval(ecs_ftime_t interval) {
ecs_set_interval(m_world, m_id, interval);
}
inline ecs_ftime_t system::interval() {
return ecs_get_interval(m_world, m_id);
}
inline void system::timeout(ecs_ftime_t timeout) {
ecs_set_timeout(m_world, m_id, timeout);
}
inline ecs_ftime_t system::timeout() {
return ecs_get_timeout(m_world, m_id);
}
inline void system::rate(int32_t rate) {
ecs_set_rate(m_world, m_id, rate, 0);
}
inline void system::start() {
ecs_start_timer(m_world, m_id);
}
inline void system::stop() {
ecs_stop_timer(m_world, m_id);
}
template<typename T>
inline void system::set_tick_source() {
ecs_set_tick_source(m_world, m_id, _::cpp_type<T>::id(m_world));
}
inline void system::set_tick_source(flecs::entity e) {
ecs_set_tick_source(m_world, m_id, e);
}
namespace _ {
inline void timer_init(flecs::world& world) {
world.component<RateFilter>("flecs::timer::RateFilter");
world.component<Timer>("flecs::timer::Timer");
}
}
}
#endif
#ifdef FLECS_SNAPSHOT
/**
* @file addons/cpp/mixins/snapshot/impl.hpp
* @brief Snapshot module implementation.
*/
#pragma once
namespace flecs {
struct snapshot final {
explicit snapshot(const world& world)
: m_world( world )
, m_snapshot( nullptr ) { }
snapshot(const snapshot& obj)
: m_world( obj.m_world )
{
ecs_iter_t it = ecs_snapshot_iter(obj.m_snapshot);
m_snapshot = ecs_snapshot_take_w_iter(&it);
}
snapshot(snapshot&& obj) noexcept
: m_world(obj.m_world)
, m_snapshot(obj.m_snapshot)
{
obj.m_snapshot = nullptr;
}
snapshot& operator=(const snapshot& obj) {
ecs_assert(m_world.c_ptr() == obj.m_world.c_ptr(), ECS_INVALID_PARAMETER, NULL);
ecs_iter_t it = ecs_snapshot_iter(obj.m_snapshot);
m_snapshot = ecs_snapshot_take_w_iter(&it);
return *this;
}
snapshot& operator=(snapshot&& obj) noexcept {
ecs_assert(m_world.c_ptr() == obj.m_world.c_ptr(), ECS_INVALID_PARAMETER, NULL);
m_snapshot = obj.m_snapshot;
obj.m_snapshot = nullptr;
return *this;
}
void take() {
if (m_snapshot) {
ecs_snapshot_free(m_snapshot);
}
m_snapshot = ecs_snapshot_take(m_world.c_ptr());
}
template <typename F>
void take(const F& f) {
if (m_snapshot) {
ecs_snapshot_free(m_snapshot);
}
ecs_iter_t it = ecs_filter_iter(m_world, f.c_ptr());
m_snapshot = ecs_snapshot_take_w_iter(&it);
}
void restore() {
if (m_snapshot) {
ecs_snapshot_restore(m_world.c_ptr(), m_snapshot);
m_snapshot = nullptr;
}
}
~snapshot() {
if (m_snapshot) {
ecs_snapshot_free(m_snapshot);
}
}
snapshot_t* c_ptr() const {
return m_snapshot;
}
private:
const world& m_world;
snapshot_t *m_snapshot;
};
// Snapshot mixin implementation
template <typename... Args>
inline flecs::snapshot world::snapshot(Args &&... args) const {
return flecs::snapshot(*this, FLECS_FWD(args)...);
}
}
#endif
#ifdef FLECS_DOC
/**
* @file addons/cpp/mixins/doc/impl.hpp
* @brief Doc mixin implementation.
*/
#pragma once
namespace flecs {
namespace doc {
/** Get human readable name for an entity.
*
* @see ecs_doc_get_name()
* @see flecs::doc::set_name()
* @see flecs::entity_view::doc_name()
*
* @ingroup cpp_addons_doc
*/
inline const char* get_name(const flecs::entity_view& e) {
return ecs_doc_get_name(e.world(), e);
}
/** Get brief description for an entity.
*
* @see ecs_doc_get_brief()
* @see flecs::doc::set_brief()
* @see flecs::entity_view::doc_brief()
*
* @ingroup cpp_addons_doc
*/
inline const char* get_brief(const flecs::entity_view& e) {
return ecs_doc_get_brief(e.world(), e);
}
/** Get detailed description for an entity.
*
* @see ecs_doc_get_detail()
* @see flecs::doc::set_detail()
* @see flecs::entity_view::doc_detail()
*
* @ingroup cpp_addons_doc
*/
inline const char* get_detail(const flecs::entity_view& e) {
return ecs_doc_get_detail(e.world(), e);
}
/** Get link to external documentation for an entity.
*
* @see ecs_doc_get_link()
* @see flecs::doc::set_link()
* @see flecs::entity_view::doc_link()
*
* @ingroup cpp_addons_doc
*/
inline const char* get_link(const flecs::entity_view& e) {
return ecs_doc_get_link(e.world(), e);
}
/** Get color for an entity.
*
* @see ecs_doc_get_color()
* @see flecs::doc::set_color()
* @see flecs::entity_view::doc_color()
*
* @ingroup cpp_addons_doc
*/
inline const char* get_color(const flecs::entity_view& e) {
return ecs_doc_get_color(e.world(), e);
}
/** Set human readable name for an entity.
*
* @see ecs_doc_set_name()
* @see flecs::doc::get_name()
* @see flecs::entity_builder::set_doc_name()
*
* @ingroup cpp_addons_doc
*/
inline void set_name(flecs::entity& e, const char *name) {
ecs_doc_set_name(e.world(), e, name);
}
/** Set brief description for an entity.
*
* @see ecs_doc_set_brief()
* @see flecs::doc::get_brief()
* @see flecs::entity_builder::set_doc_brief()
*
* @ingroup cpp_addons_doc
*/
inline void set_brief(flecs::entity& e, const char *description) {
ecs_doc_set_brief(e.world(), e, description);
}
/** Set detailed description for an entity.
*
* @see ecs_doc_set_detail()
* @see flecs::doc::get_detail()
* @see flecs::entity_builder::set_doc_detail()
*
* @ingroup cpp_addons_doc
*/
inline void set_detail(flecs::entity& e, const char *description) {
ecs_doc_set_detail(e.world(), e, description);
}
/** Set link to external documentation for an entity.
*
* @see ecs_doc_set_link()
* @see flecs::doc::get_link()
* @see flecs::entity_builder::set_doc_link()
*
* @ingroup cpp_addons_doc
*/
inline void set_link(flecs::entity& e, const char *link) {
ecs_doc_set_link(e.world(), e, link);
}
/** Set color for an entity.
*
* @see ecs_doc_set_color()
* @see flecs::doc::get_color()
* @see flecs::entity_builder::set_doc_color()
*
* @ingroup cpp_addons_doc
*/
inline void set_color(flecs::entity& e, const char *color) {
ecs_doc_set_color(e.world(), e, color);
}
/** @private */
namespace _ {
/** @private */
inline void init(flecs::world& world) {
world.component<doc::Description>("flecs::doc::Description");
}
} // namespace _
} // namespace doc
} // namespace flecs
#endif
#ifdef FLECS_DOC
#endif
#ifdef FLECS_REST
/**
* @file addons/cpp/mixins/rest/impl.hpp
* @brief Rest module implementation.
*/
#pragma once
namespace flecs {
namespace rest {
namespace _ {
inline void init(flecs::world& world) {
world.component<Rest>("flecs::rest::Rest");
}
} // namespace _
} // namespace rest
} // namespace flecs
#endif
#ifdef FLECS_RULES
/**
* @file addons/cpp/mixins/rule/impl.hpp
* @brief Rule implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/rule/builder.hpp
* @brief Rule builder.
*/
#pragma once
namespace flecs {
namespace _ {
template <typename ... Components>
using rule_builder_base = builder<
rule, ecs_filter_desc_t, rule_builder<Components...>,
filter_builder_i, Components ...>;
}
/** Rule builder.
*
* @ingroup cpp_addons_rules
*/
template <typename ... Components>
struct rule_builder final : _::rule_builder_base<Components...> {
rule_builder(flecs::world_t* world, const char *name = nullptr)
: _::rule_builder_base<Components...>(world)
{
_::sig<Components...>(world).populate(this);
if (name != nullptr) {
ecs_entity_desc_t entity_desc = {};
entity_desc.name = name;
entity_desc.sep = "::";
entity_desc.root_sep = "::";
this->m_desc.entity = ecs_entity_init(world, &entity_desc);
}
}
};
}
namespace flecs {
////////////////////////////////////////////////////////////////////////////////
//// Persistent queries
////////////////////////////////////////////////////////////////////////////////
struct rule_base {
rule_base()
: m_world(nullptr)
, m_rule(nullptr) { }
rule_base(world_t *world, rule_t *rule = nullptr)
: m_world(world)
, m_rule(rule) { }
rule_base(world_t *world, ecs_filter_desc_t *desc)
: m_world(world)
{
m_rule = ecs_rule_init(world, desc);
if (desc->terms_buffer) {
ecs_os_free(desc->terms_buffer);
}
}
bool is_valid() const {
return m_rule != nullptr;
}
operator rule_t*() const {
return m_rule;
}
flecs::entity entity() {
return flecs::entity(m_world, ecs_get_entity(m_rule));
}
/** Free the rule. */
void destruct() {
if (m_rule) {
ecs_rule_fini(m_rule);
m_world = nullptr;
m_rule = nullptr;
}
}
template <typename Func>
void each_term(const Func& func) const {
this->filter().each_term(func);
}
/** Move the rule. */
void move(flecs::rule_base&& obj) {
this->destruct();
this->m_world = obj.m_world;
this->m_rule = obj.m_rule;
obj.m_world = nullptr;
obj.m_rule = nullptr;
}
flecs::filter_base filter() const {
return filter_base(m_world, ecs_rule_get_filter(m_rule));
}
/** Converts this rule to a string expression
* @see ecs_filter_str
*/
flecs::string str() const {
const ecs_filter_t *f = ecs_rule_get_filter(m_rule);
char *result = ecs_filter_str(m_world, f);
return flecs::string(result);
}
/** Converts this rule to a string that can be used to aid debugging
* the behavior of the rule.
* @see ecs_rule_str
*/
flecs::string rule_str() const {
char *result = ecs_rule_str(m_rule);
return flecs::string(result);
}
operator rule<>() const;
protected:
world_t *m_world;
rule_t *m_rule;
};
template<typename ... Components>
struct rule final : rule_base, iterable<Components...> {
private:
using Terms = typename _::term_ptrs<Components...>::array;
ecs_iter_t get_iter(flecs::world_t *world) const override {
if (!world) {
world = m_world;
}
return ecs_rule_iter(world, m_rule);
}
ecs_iter_next_action_t next_action() const override {
return ecs_rule_next;
}
ecs_iter_next_action_t next_each_action() const override {
return ecs_rule_next_instanced;
}
public:
using rule_base::rule_base;
int32_t find_var(const char *name) {
return ecs_rule_find_var(m_rule, name);
}
};
// Mixin implementation
template <typename... Comps, typename... Args>
inline flecs::rule<Comps...> world::rule(Args &&... args) const {
return flecs::rule_builder<Comps...>(m_world, FLECS_FWD(args)...)
.build();
}
template <typename... Comps, typename... Args>
inline flecs::rule_builder<Comps...> world::rule_builder(Args &&... args) const {
return flecs::rule_builder<Comps...>(m_world, FLECS_FWD(args)...);
}
// rule_base implementation
inline rule_base::operator rule<>() const {
return flecs::rule<>(m_world, m_rule);
}
} // namespace flecs
#endif
#ifdef FLECS_META
/**
* @file addons/cpp/mixins/meta/impl.hpp
* @brief Meta implementation.
*/
#pragma once
FLECS_ENUM_LAST(flecs::meta::type_kind_t, flecs::meta::TypeKindLast)
FLECS_ENUM_LAST(flecs::meta::primitive_kind_t, flecs::meta::PrimitiveKindLast)
namespace flecs {
namespace meta {
namespace _ {
/* Type support for entity wrappers */
template <typename EntityType>
inline flecs::opaque<EntityType> flecs_entity_support(flecs::world&) {
return flecs::opaque<EntityType>()
.as_type(flecs::Entity)
.serialize([](const flecs::serializer *ser, const EntityType *data) {
flecs::entity_t id = data->id();
return ser->value(flecs::Entity, &id);
})
.assign_entity(
[](EntityType *dst, flecs::world_t *world, flecs::entity_t e) {
*dst = EntityType(world, e);
});
}
inline void init(flecs::world& world) {
world.component<bool_t>("flecs::meta::bool");
world.component<char_t>("flecs::meta::char");
world.component<u8_t>("flecs::meta::u8");
world.component<u16_t>("flecs::meta::u16");
world.component<u32_t>("flecs::meta::u32");
world.component<u64_t>("flecs::meta::u64");
world.component<i8_t>("flecs::meta::i8");
world.component<i16_t>("flecs::meta::i16");
world.component<i32_t>("flecs::meta::i32");
world.component<i64_t>("flecs::meta::i64");
world.component<f32_t>("flecs::meta::f32");
world.component<f64_t>("flecs::meta::f64");
world.component<type_kind_t>("flecs::meta::type_kind");
world.component<primitive_kind_t>("flecs::meta::primitive_kind");
world.component<member_t>("flecs::meta::member");
world.component<enum_constant_t>("flecs::meta::enum_constant");
world.component<bitmask_constant_t>("flecs::meta::bitmask_constant");
world.component<MetaType>("flecs::meta::MetaType");
world.component<MetaTypeSerialized>("flecs::meta::MetaTypeSerialized");
world.component<Primitive>("flecs::meta::Primitive");
world.component<Enum>("flecs::meta::Enum");
world.component<Bitmask>("flecs::meta::Bitmask");
world.component<Member>("flecs::meta::Member");
world.component<Struct>("flecs::meta::Struct");
world.component<Array>("flecs::meta::Array");
world.component<Vector>("flecs::meta::Vector");
world.component<Unit>("flecs::meta::Unit");
// To support member<uintptr_t> and member<intptr_t> register components
// (that do not have conflicting symbols with builtin ones) for platform
// specific types.
if (!flecs::is_same<i32_t, iptr_t>() && !flecs::is_same<i64_t, iptr_t>()) {
flecs::_::cpp_type<iptr_t>::init(flecs::Iptr, true);
ecs_assert(flecs::type_id<iptr_t>() == flecs::Iptr,
ECS_INTERNAL_ERROR, NULL);
// Remove symbol to prevent validation errors, as it doesn't match with
// the typename
ecs_remove_pair(world, flecs::Iptr, ecs_id(EcsIdentifier), EcsSymbol);
}
if (!flecs::is_same<u32_t, uptr_t>() && !flecs::is_same<u64_t, uptr_t>()) {
flecs::_::cpp_type<uptr_t>::init(flecs::Uptr, true);
ecs_assert(flecs::type_id<uptr_t>() == flecs::Uptr,
ECS_INTERNAL_ERROR, NULL);
// Remove symbol to prevent validation errors, as it doesn't match with
// the typename
ecs_remove_pair(world, flecs::Uptr, ecs_id(EcsIdentifier), EcsSymbol);
}
// Register opaque type support for C++ entity wrappers
world.component<flecs::entity_view>()
.opaque(flecs_entity_support<flecs::entity_view>);
world.component<flecs::entity>()
.opaque(flecs_entity_support<flecs::entity>);
}
} // namespace _
} // namespace meta
inline flecs::entity cursor::get_type() const {
return flecs::entity(m_cursor.world, ecs_meta_get_type(&m_cursor));
}
inline flecs::entity cursor::get_unit() const {
return flecs::entity(m_cursor.world, ecs_meta_get_unit(&m_cursor));
}
inline flecs::entity cursor::get_entity() const {
return flecs::entity(m_cursor.world, ecs_meta_get_entity(&m_cursor));
}
/** Create primitive type */
inline flecs::entity world::primitive(flecs::meta::primitive_kind_t kind) {
ecs_primitive_desc_t desc = {};
desc.kind = kind;
flecs::entity_t eid = ecs_primitive_init(m_world, &desc);
ecs_assert(eid != 0, ECS_INVALID_OPERATION, NULL);
return flecs::entity(m_world, eid);
}
/** Create array type. */
inline flecs::entity world::array(flecs::entity_t elem_id, int32_t array_count) {
ecs_array_desc_t desc = {};
desc.type = elem_id;
desc.count = array_count;
flecs::entity_t eid = ecs_array_init(m_world, &desc);
ecs_assert(eid != 0, ECS_INVALID_OPERATION, NULL);
return flecs::entity(m_world, eid);
}
/** Create array type. */
template <typename T>
inline flecs::entity world::array(int32_t array_count) {
return this->array(_::cpp_type<T>::id(m_world), array_count);
}
inline flecs::entity world::vector(flecs::entity_t elem_id) {
ecs_vector_desc_t desc = {};
desc.type = elem_id;
flecs::entity_t eid = ecs_vector_init(m_world, &desc);
ecs_assert(eid != 0, ECS_INVALID_OPERATION, NULL);
return flecs::entity(m_world, eid);
}
template <typename T>
inline flecs::entity world::vector() {
return this->vector(_::cpp_type<T>::id(m_world));
}
} // namespace flecs
inline int ecs_serializer_t::value(ecs_entity_t type, const void *v) const {
return this->value_(this, type, v);
}
template <typename T>
inline int ecs_serializer_t::value(const T& v) const {
return this->value(flecs::_::cpp_type<T>::id(
const_cast<flecs::world_t*>(this->world)), &v);
}
inline int ecs_serializer_t::member(const char *name) const {
return this->member_(this, name);
}
#endif
#ifdef FLECS_UNITS
/**
* @file addons/cpp/mixins/units/impl.hpp
* @brief Units module implementation.
*/
#pragma once
namespace flecs {
inline units::units(flecs::world& world) {
/* Import C module */
FlecsUnitsImport(world);
/* Bridge between C++ types and flecs.units entities */
world.module<units>();
// Initialize world.entity(prefixes) scope
world.entity<Prefixes>("::flecs::units::prefixes");
// Initialize prefixes
world.entity<Yocto>("::flecs::units::prefixes::Yocto");
world.entity<Zepto>("::flecs::units::prefixes::Zepto");
world.entity<Atto>("::flecs::units::prefixes::Atto");
world.entity<Femto>("::flecs::units::prefixes::Femto");
world.entity<Pico>("::flecs::units::prefixes::Pico");
world.entity<Nano>("::flecs::units::prefixes::Nano");
world.entity<Micro>("::flecs::units::prefixes::Micro");
world.entity<Milli>("::flecs::units::prefixes::Milli");
world.entity<Centi>("::flecs::units::prefixes::Centi");
world.entity<Deci>("::flecs::units::prefixes::Deci");
world.entity<Deca>("::flecs::units::prefixes::Deca");
world.entity<Hecto>("::flecs::units::prefixes::Hecto");
world.entity<Kilo>("::flecs::units::prefixes::Kilo");
world.entity<Mega>("::flecs::units::prefixes::Mega");
world.entity<Giga>("::flecs::units::prefixes::Giga");
world.entity<Tera>("::flecs::units::prefixes::Tera");
world.entity<Peta>("::flecs::units::prefixes::Peta");
world.entity<Exa>("::flecs::units::prefixes::Exa");
world.entity<Zetta>("::flecs::units::prefixes::Zetta");
world.entity<Yotta>("::flecs::units::prefixes::Yotta");
world.entity<Kibi>("::flecs::units::prefixes::Kibi");
world.entity<Mebi>("::flecs::units::prefixes::Mebi");
world.entity<Gibi>("::flecs::units::prefixes::Gibi");
world.entity<Tebi>("::flecs::units::prefixes::Tebi");
world.entity<Pebi>("::flecs::units::prefixes::Pebi");
world.entity<Exbi>("::flecs::units::prefixes::Exbi");
world.entity<Zebi>("::flecs::units::prefixes::Zebi");
world.entity<Yobi>("::flecs::units::prefixes::Yobi");
// Initialize quantities
world.entity<Duration>("::flecs::units::Duration");
world.entity<Time>("::flecs::units::Time");
world.entity<Mass>("::flecs::units::Mass");
world.entity<Force>("::flecs::units::Force");
world.entity<ElectricCurrent>("::flecs::units::ElectricCurrent");
world.entity<Amount>("::flecs::units::Amount");
world.entity<LuminousIntensity>("::flecs::units::LuminousIntensity");
world.entity<Length>("::flecs::units::Length");
world.entity<Pressure>("::flecs::units::Pressure");
world.entity<Speed>("::flecs::units::Speed");
world.entity<Temperature>("::flecs::units::Temperature");
world.entity<Data>("::flecs::units::Data");
world.entity<DataRate>("::flecs::units::DataRate");
world.entity<Angle>("::flecs::units::Angle");
world.entity<Frequency>("::flecs::units::Frequency");
world.entity<Uri>("::flecs::units::Uri");
// Initialize duration units
world.entity<duration::PicoSeconds>(
"::flecs::units::Duration::PicoSeconds");
world.entity<duration::NanoSeconds>(
"::flecs::units::Duration::NanoSeconds");
world.entity<duration::MicroSeconds>(
"::flecs::units::Duration::MicroSeconds");
world.entity<duration::MilliSeconds>(
"::flecs::units::Duration::MilliSeconds");
world.entity<duration::Seconds>(
"::flecs::units::Duration::Seconds");
world.entity<duration::Minutes>(
"::flecs::units::Duration::Minutes");
world.entity<duration::Hours>(
"::flecs::units::Duration::Hours");
world.entity<duration::Days>(
"::flecs::units::Duration::Days");
// Initialize time units
world.entity<time::Date>("::flecs::units::Time::Date");
// Initialize mass units
world.entity<mass::Grams>("::flecs::units::Mass::Grams");
world.entity<mass::KiloGrams>("::flecs::units::Mass::KiloGrams");
// Initialize current units
world.entity<electric_current::Ampere>
("::flecs::units::ElectricCurrent::Ampere");
// Initialize amount units
world.entity<amount::Mole>("::flecs::units::Amount::Mole");
// Initialize luminous intensity units
world.entity<luminous_intensity::Candela>(
"::flecs::units::LuminousIntensity::Candela");
// Initialize force units
world.entity<force::Newton>("::flecs::units::Force::Newton");
// Initialize length units
world.entity<length::Meters>("::flecs::units::Length::Meters");
world.entity<length::PicoMeters>("::flecs::units::Length::PicoMeters");
world.entity<length::NanoMeters>("::flecs::units::Length::NanoMeters");
world.entity<length::MicroMeters>("::flecs::units::Length::MicroMeters");
world.entity<length::MilliMeters>("::flecs::units::Length::MilliMeters");
world.entity<length::CentiMeters>("::flecs::units::Length::CentiMeters");
world.entity<length::KiloMeters>("::flecs::units::Length::KiloMeters");
world.entity<length::Miles>("::flecs::units::Length::Miles");
world.entity<length::Pixels>("::flecs::units::Length::Pixels");
// Initialize pressure units
world.entity<pressure::Pascal>("::flecs::units::Pressure::Pascal");
world.entity<pressure::Bar>("::flecs::units::Pressure::Bar");
// Initialize speed units
world.entity<speed::MetersPerSecond>(
"::flecs::units::Speed::MetersPerSecond");
world.entity<speed::KiloMetersPerSecond>(
"::flecs::units::Speed::KiloMetersPerSecond");
world.entity<speed::KiloMetersPerHour>(
"::flecs::units::Speed::KiloMetersPerHour");
world.entity<speed::MilesPerHour>(
"::flecs::units::Speed::MilesPerHour");
// Initialize temperature units
world.entity<temperature::Kelvin>(
"::flecs::units::Temperature::Kelvin");
world.entity<temperature::Celsius>(
"::flecs::units::Temperature::Celsius");
world.entity<temperature::Fahrenheit>(
"::flecs::units::Temperature::Fahrenheit");
// Initialize data units
world.entity<data::Bits>(
"::flecs::units::Data::Bits");
world.entity<data::KiloBits>(
"::flecs::units::Data::KiloBits");
world.entity<data::MegaBits>(
"::flecs::units::Data::MegaBits");
world.entity<data::GigaBits>(
"::flecs::units::Data::GigaBits");
world.entity<data::Bytes>(
"::flecs::units::Data::Bytes");
world.entity<data::KiloBytes>(
"::flecs::units::Data::KiloBytes");
world.entity<data::MegaBytes>(
"::flecs::units::Data::MegaBytes");
world.entity<data::GigaBytes>(
"::flecs::units::Data::GigaBytes");
world.entity<data::KibiBytes>(
"::flecs::units::Data::KibiBytes");
world.entity<data::MebiBytes>(
"::flecs::units::Data::MebiBytes");
world.entity<data::GibiBytes>(
"::flecs::units::Data::GibiBytes");
// Initialize datarate units
world.entity<datarate::BitsPerSecond>(
"::flecs::units::DataRate::BitsPerSecond");
world.entity<datarate::KiloBitsPerSecond>(
"::flecs::units::DataRate::KiloBitsPerSecond");
world.entity<datarate::MegaBitsPerSecond>(
"::flecs::units::DataRate::MegaBitsPerSecond");
world.entity<datarate::GigaBitsPerSecond>(
"::flecs::units::DataRate::GigaBitsPerSecond");
world.entity<datarate::BytesPerSecond>(
"::flecs::units::DataRate::BytesPerSecond");
world.entity<datarate::KiloBytesPerSecond>(
"::flecs::units::DataRate::KiloBytesPerSecond");
world.entity<datarate::MegaBytesPerSecond>(
"::flecs::units::DataRate::MegaBytesPerSecond");
world.entity<datarate::GigaBytesPerSecond>(
"::flecs::units::DataRate::GigaBytesPerSecond");
// Initialize hertz units
world.entity<frequency::Hertz>(
"::flecs::units::Frequency::Hertz");
world.entity<frequency::KiloHertz>(
"::flecs::units::Frequency::KiloHertz");
world.entity<frequency::MegaHertz>(
"::flecs::units::Frequency::MegaHertz");
world.entity<frequency::GigaHertz>(
"::flecs::units::Frequency::GigaHertz");
// Initialize uri units
world.entity<uri::Hyperlink>(
"::flecs::units::Uri::Hyperlink");
world.entity<uri::Image>(
"::flecs::units::Uri::Image");
world.entity<uri::File>(
"::flecs::units::Uri::File");
// Initialize angles
world.entity<angle::Radians>(
"::flecs::units::Angle::Radians");
world.entity<angle::Degrees>(
"::flecs::units::Angle::Degrees");
// Initialize percentage
world.entity<Percentage>("::flecs::units::Percentage");
// Initialize Bel
world.entity<Bel>("::flecs::units::Bel");
world.entity<DeciBel>("::flecs::units::DeciBel");
}
}
#endif
#ifdef FLECS_MONITOR
/**
* @file addons/cpp/mixins/monitor/impl.hpp
* @brief Monitor module implementation.
*/
#pragma once
namespace flecs {
inline monitor::monitor(flecs::world& world) {
/* Import C module */
FlecsMonitorImport(world);
}
}
#endif
#ifdef FLECS_METRICS
/**
* @file addons/cpp/mixins/metrics/impl.hpp
* @brief Metrics module implementation.
*/
#pragma once
namespace flecs {
inline metrics::metrics(flecs::world& world) {
world.import<flecs::units>();
/* Import C module */
FlecsMetricsImport(world);
world.entity<metrics::Instance>("::flecs::metrics::Instance");
world.entity<metrics::Metric>("::flecs::metrics::Metric");
world.entity<metrics::Counter>("::flecs::metrics::Metric::Counter");
world.entity<metrics::CounterId>("::flecs::metrics::Metric::CounterId");
world.entity<metrics::CounterIncrement>("::flecs::metrics::Metric::CounterIncrement");
world.entity<metrics::Gauge>("::flecs::metrics::Metric::Gauge");
}
inline metric_builder::~metric_builder() {
if (!m_created) {
ecs_metric_init(m_world, &m_desc);
}
}
inline metric_builder& metric_builder::member(const char *name) {
flecs::entity m;
if (m_desc.id) {
flecs::entity_t type = ecs_get_typeid(m_world, m_desc.id);
m = flecs::entity(m_world, type).lookup(name);
} else {
m = flecs::world(m_world).lookup(name);
}
if (!m) {
flecs::log::err("member '%s' not found", name);
}
return member(m);
}
template <typename T>
inline metric_builder& metric_builder::member(const char *name) {
flecs::entity e (m_world, _::cpp_type<T>::id(m_world));
flecs::entity_t m = e.lookup(name);
if (!m) {
flecs::log::err("member '%s' not found in type '%s'",
name, e.path().c_str());
return *this;
}
return member(m);
}
inline metric_builder& metric_builder::dotmember(const char *expr) {
m_desc.dotmember = expr;
return *this;
}
template <typename T>
inline metric_builder& metric_builder::dotmember(const char *expr) {
m_desc.dotmember = expr;
m_desc.id = _::cpp_type<T>::id(m_world);
return *this;
}
inline metric_builder::operator flecs::entity() {
if (!m_created) {
m_created = true;
flecs::entity result(m_world, ecs_metric_init(m_world, &m_desc));
m_desc.entity = result;
return result;
} else {
return flecs::entity(m_world, m_desc.entity);
}
}
template <typename... Args>
inline flecs::metric_builder world::metric(Args &&... args) const {
flecs::entity result(m_world, FLECS_FWD(args)...);
return flecs::metric_builder(m_world, result);
}
template <typename Kind>
inline untyped_component& untyped_component::metric(
flecs::entity_t parent,
const char *brief,
const char *metric_name)
{
flecs::world w(m_world);
flecs::entity e(m_world, m_id);
const flecs::member_t *m = ecs_cpp_last_member(w, e);
if (!m) {
return *this;
}
flecs::entity me = w.entity(m->member);
flecs::entity metric_entity = me;
if (parent) {
const char *component_name = e.name();
if (!metric_name) {
if (ecs_os_strcmp(m->name, "value") || !component_name) {
metric_entity = w.scope(parent).entity(m->name);
} else {
// If name of member is "value", use name of type.
char *snake_name = flecs_to_snake_case(component_name);
metric_entity = w.scope(parent).entity(snake_name);
ecs_os_free(snake_name);
}
} else {
metric_entity = w.scope(parent).entity(metric_name);
}
}
w.metric(metric_entity).member(me).kind<Kind>().brief(brief);
return *this;
}
}
#endif
#ifdef FLECS_ALERTS
/**
* @file addons/cpp/mixins/alerts/impl.hpp
* @brief Alerts module implementation.
*/
#pragma once
/**
* @file addons/cpp/mixins/alerts/builder.hpp
* @brief Alert builder.
*/
#pragma once
/**
* @file addons/cpp/mixins/alerts/builder_i.hpp
* @brief Alert builder interface.
*/
#pragma once
namespace flecs {
/** Alert builder interface.
*
* @ingroup cpp_addons_alerts
*/
template<typename Base, typename ... Components>
struct alert_builder_i : filter_builder_i<Base, Components ...> {
private:
using BaseClass = filter_builder_i<Base, Components ...>;
public:
alert_builder_i()
: BaseClass(nullptr)
, m_desc(nullptr) { }
alert_builder_i(ecs_alert_desc_t *desc, int32_t term_index = 0)
: BaseClass(&desc->filter, term_index)
, m_desc(desc) { }
/** Alert message.
*
* @see ecs_alert_desc_t::message
*/
Base& message(const char *message) {
m_desc->message = message;
return *this;
}
/** Set brief description for alert.
*
* @see ecs_alert_desc_t::brief
*/
Base& brief(const char *brief) {
m_desc->brief = brief;
return *this;
}
/** Set doc name for alert.
*
* @see ecs_alert_desc_t::doc_name
*/
Base& doc_name(const char *doc_name) {
m_desc->doc_name = doc_name;
return *this;
}
/** Set severity of alert (default is Error)
*
* @see ecs_alert_desc_t::severity
*/
Base& severity(flecs::entity_t kind) {
m_desc->severity = kind;
return *this;
}
/* Set retain period of alert.
*
* @see ecs_alert_desc_t::retain_period
*/
Base& retain_period(ecs_ftime_t period) {
m_desc->retain_period = period;
return *this;
}
/** Set severity of alert (default is Error)
*
* @see ecs_alert_desc_t::severity
*/
template <typename Severity>
Base& severity() {
return severity(_::cpp_type<Severity>::id(world_v()));
}
/** Add severity filter */
Base& severity_filter(flecs::entity_t kind, flecs::id_t with, const char *var = nullptr) {
ecs_assert(severity_filter_count < ECS_ALERT_MAX_SEVERITY_FILTERS,
ECS_INVALID_PARAMETER, "Maximum number of severity filters reached");
ecs_alert_severity_filter_t *filter =
&m_desc->severity_filters[severity_filter_count ++];
filter->severity = kind;
filter->with = with;
filter->var = var;
return *this;
}
/** Add severity filter */
template <typename Severity>
Base& severity_filter(flecs::id_t with, const char *var = nullptr) {
return severity_filter(_::cpp_type<Severity>::id(world_v()), with, var);
}
/** Add severity filter */
template <typename Severity, typename T, if_not_t< is_enum<T>::value > = 0>
Base& severity_filter(const char *var = nullptr) {
return severity_filter(_::cpp_type<Severity>::id(world_v()),
_::cpp_type<T>::id(world_v()), var);
}
/** Add severity filter */
template <typename Severity, typename T, if_t< is_enum<T>::value > = 0 >
Base& severity_filter(T with, const char *var = nullptr) {
flecs::world w(world_v());
flecs::entity constant = w.to_entity<T>(with);
return severity_filter(_::cpp_type<Severity>::id(world_v()),
w.pair<T>(constant), var);
}
/** Set member to create an alert for out of range values */
Base& member(flecs::entity_t m) {
m_desc->member = m;
return *this;
}
/** Set (component) id for member (optional). If .member() is set and id
* is not set, the id will default to the member parent. */
Base& id(flecs::id_t id) {
m_desc->id = id;
return *this;
}
/** Set member to create an alert for out of range values */
template <typename T>
Base& member(const char *m, const char *v = nullptr) {
flecs::entity_t id = _::cpp_type<T>::id(world_v());
flecs::entity_t mid = ecs_lookup_path_w_sep(
world_v(), id, m, "::", "::", false);
ecs_assert(m != 0, ECS_INVALID_PARAMETER, NULL);
m_desc->var = v;
return this->member(mid);
}
/** Set source variable for member (optional, defaults to $this) */
Base& var(const char *v) {
m_desc->var = v;
return *this;
}
protected:
virtual flecs::world_t* world_v() = 0;
private:
operator Base&() {
return *static_cast<Base*>(this);
}
ecs_alert_desc_t *m_desc;
int32_t severity_filter_count = 0;
};
}
namespace flecs {
namespace _ {
template <typename ... Components>
using alert_builder_base = builder<
alert, ecs_alert_desc_t, alert_builder<Components...>,
alert_builder_i, Components ...>;
}
/** Alert builder.
*
* @ingroup cpp_addons_alerts
*/
template <typename ... Components>
struct alert_builder final : _::alert_builder_base<Components...> {
alert_builder(flecs::world_t* world, const char *name = nullptr)
: _::alert_builder_base<Components...>(world)
{
_::sig<Components...>(world).populate(this);
if (name != nullptr) {
ecs_entity_desc_t entity_desc = {};
entity_desc.name = name;
entity_desc.sep = "::";
entity_desc.root_sep = "::";
this->m_desc.entity = ecs_entity_init(world, &entity_desc);
}
}
};
}
namespace flecs {
template <typename ... Components>
struct alert final : entity
{
using entity::entity;
explicit alert() {
m_id = 0;
m_world = nullptr;
}
explicit alert(flecs::world_t *world, ecs_alert_desc_t *desc)
{
m_world = world;
m_id = ecs_alert_init(world, desc);
if (desc->filter.terms_buffer) {
ecs_os_free(desc->filter.terms_buffer);
}
}
};
inline alerts::alerts(flecs::world& world) {
/* Import C module */
FlecsAlertsImport(world);
world.entity<alerts::Alert>("::flecs::alerts::Alert");
world.entity<alerts::Info>("::flecs::alerts::Info");
world.entity<alerts::Warning>("::flecs::alerts::Warning");
world.entity<alerts::Error>("::flecs::alerts::Error");
}
template <typename... Comps, typename... Args>
inline flecs::alert_builder<Comps...> world::alert(Args &&... args) const {
return flecs::alert_builder<Comps...>(m_world, FLECS_FWD(args)...);
}
}
#endif
/**
* @file addons/cpp/impl/iter.hpp
* @brief Iterator implementation.
*/
#pragma once
namespace flecs
{
inline flecs::entity iter::system() const {
return flecs::entity(m_iter->world, m_iter->system);
}
inline flecs::entity iter::event() const {
return flecs::entity(m_iter->world, m_iter->event);
}
inline flecs::id iter::event_id() const {
return flecs::id(m_iter->world, m_iter->event_id);
}
inline flecs::world iter::world() const {
return flecs::world(m_iter->world);
}
inline flecs::entity iter::entity(size_t row) const {
ecs_assert(row < static_cast<size_t>(m_iter->count),
ECS_COLUMN_INDEX_OUT_OF_RANGE, NULL);
return flecs::entity(m_iter->world, m_iter->entities[row]);
}
template <typename T>
inline column<T>::column(iter &iter, int32_t index) {
*this = iter.field<T>(index);
}
inline flecs::entity iter::src(int32_t index) const {
return flecs::entity(m_iter->world, ecs_field_src(m_iter, index));
}
inline flecs::id iter::id(int32_t index) const {
return flecs::id(m_iter->world, ecs_field_id(m_iter, index));
}
inline flecs::id iter::pair(int32_t index) const {
flecs::id_t id = ecs_field_id(m_iter, index);
ecs_check(ECS_HAS_ID_FLAG(id, PAIR), ECS_INVALID_PARAMETER, NULL);
return flecs::id(m_iter->world, id);
error:
return flecs::id();
}
inline flecs::type iter::type() const {
return flecs::type(m_iter->world, ecs_table_get_type(m_iter->table));
}
inline flecs::table iter::table() const {
return flecs::table(m_iter->real_world, m_iter->table);
}
inline flecs::table_range iter::range() const {
return flecs::table_range(m_iter->real_world, m_iter->table,
m_iter->offset, m_iter->count);
}
#ifdef FLECS_RULES
inline flecs::entity iter::get_var(int var_id) const {
ecs_assert(var_id != -1, ECS_INVALID_PARAMETER, 0);
return flecs::entity(m_iter->world, ecs_iter_get_var(m_iter, var_id));
}
/** Get value of variable by name.
* Get value of a query variable for current result.
*/
inline flecs::entity iter::get_var(const char *name) const {
ecs_rule_iter_t *rit = &m_iter->priv.iter.rule;
const flecs::rule_t *r = rit->rule;
int var_id = ecs_rule_find_var(r, name);
ecs_assert(var_id != -1, ECS_INVALID_PARAMETER, name);
return flecs::entity(m_iter->world, ecs_iter_get_var(m_iter, var_id));
}
#endif
} // namespace flecs
/**
* @file addons/cpp/impl/world.hpp
* @brief World implementation.
*/
#pragma once
namespace flecs
{
inline void world::init_builtin_components() {
# ifdef FLECS_SYSTEM
_::system_init(*this);
# endif
# ifdef FLECS_TIMER
_::timer_init(*this);
# endif
# ifdef FLECS_DOC
doc::_::init(*this);
# endif
# ifdef FLECS_REST
rest::_::init(*this);
# endif
# ifdef FLECS_META
meta::_::init(*this);
# endif
}
template <typename T>
inline flecs::entity world::use(const char *alias) const {
entity_t e = _::cpp_type<T>::id(m_world);
const char *name = alias;
if (!name) {
// If no name is defined, use the entity name without the scope
name = ecs_get_name(m_world, e);
}
ecs_set_alias(m_world, e, name);
return flecs::entity(m_world, e);
}
inline flecs::entity world::use(const char *name, const char *alias) const {
entity_t e = ecs_lookup_path_w_sep(m_world, 0, name, "::", "::", true);
ecs_assert(e != 0, ECS_INVALID_PARAMETER, NULL);
ecs_set_alias(m_world, e, alias);
return flecs::entity(m_world, e);
}
inline void world::use(flecs::entity e, const char *alias) const {
entity_t eid = e.id();
const char *name = alias;
if (!name) {
// If no name is defined, use the entity name without the scope
name = ecs_get_name(m_world, eid);
}
ecs_set_alias(m_world, eid, name);
}
inline flecs::entity world::set_scope(const flecs::entity_t s) const {
return flecs::entity(ecs_set_scope(m_world, s));
}
inline flecs::entity world::get_scope() const {
return flecs::entity(m_world, ecs_get_scope(m_world));
}
template <typename T>
inline flecs::entity world::set_scope() const {
return set_scope( _::cpp_type<T>::id(m_world) );
}
inline entity world::lookup(const char *name, bool search_path) const {
auto e = ecs_lookup_path_w_sep(m_world, 0, name, "::", "::", search_path);
return flecs::entity(*this, e);
}
template <typename T>
inline T* world::get_mut() const {
flecs::entity e(m_world, _::cpp_type<T>::id(m_world));
return e.get_mut<T>();
}
template <typename T>
inline void world::modified() const {
flecs::entity e(m_world, _::cpp_type<T>::id(m_world));
e.modified<T>();
}
template <typename First, typename Second>
inline void world::set(Second second, const First& value) const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
e.set<First>(second, value);
}
template <typename First, typename Second>
inline void world::set(Second second, First&& value) const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
e.set<First>(second, value);
}
template <typename T>
inline ref<T> world::get_ref() const {
flecs::entity e(m_world, _::cpp_type<T>::id(m_world));
return e.get_ref<T>();
}
template <typename T>
inline const T* world::get() const {
flecs::entity e(m_world, _::cpp_type<T>::id(m_world));
return e.get<T>();
}
template <typename First, typename Second, typename P, typename A>
const A* world::get() const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
return e.get<First, Second>();
}
template <typename First, typename Second>
const First* world::get(Second second) const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
return e.get<First>(second);
}
template <typename T>
inline bool world::has() const {
flecs::entity e(m_world, _::cpp_type<T>::id(m_world));
return e.has<T>();
}
template <typename First, typename Second>
inline bool world::has() const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
return e.has<First, Second>();
}
template <typename First>
inline bool world::has(flecs::id_t second) const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
return e.has<First>(second);
}
inline bool world::has(flecs::id_t first, flecs::id_t second) const {
flecs::entity e(m_world, first);
return e.has(first, second);
}
template <typename T>
inline void world::add() const {
flecs::entity e(m_world, _::cpp_type<T>::id(m_world));
e.add<T>();
}
template <typename First, typename Second>
inline void world::add() const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
e.add<First, Second>();
}
template <typename First>
inline void world::add(flecs::entity_t second) const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
e.add<First>(second);
}
inline void world::add(flecs::entity_t first, flecs::entity_t second) const {
flecs::entity e(m_world, first);
e.add(first, second);
}
template <typename T>
inline void world::remove() const {
flecs::entity e(m_world, _::cpp_type<T>::id(m_world));
e.remove<T>();
}
template <typename First, typename Second>
inline void world::remove() const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
e.remove<First, Second>();
}
template <typename First>
inline void world::remove(flecs::entity_t second) const {
flecs::entity e(m_world, _::cpp_type<First>::id(m_world));
e.remove<First>(second);
}
inline void world::remove(flecs::entity_t first, flecs::entity_t second) const {
flecs::entity e(m_world, first);
e.remove(first, second);
}
template <typename Func>
inline void world::children(Func&& f) const {
this->entity(0).children(FLECS_FWD(f));
}
template <typename T>
inline flecs::entity world::singleton() const {
return flecs::entity(m_world, _::cpp_type<T>::id(m_world));
}
template <typename First>
inline flecs::entity world::target(int32_t index) const
{
return flecs::entity(m_world,
ecs_get_target(m_world, _::cpp_type<First>::id(m_world), _::cpp_type<First>::id(m_world), index));
}
template <typename T>
inline flecs::entity world::target(
flecs::entity_t relationship,
int32_t index) const
{
return flecs::entity(m_world,
ecs_get_target(m_world, _::cpp_type<T>::id(m_world), relationship, index));
}
inline flecs::entity world::target(
flecs::entity_t relationship,
int32_t index) const
{
return flecs::entity(m_world,
ecs_get_target(m_world, relationship, relationship, index));
}
template <typename Func, if_t< is_callable<Func>::value > >
inline void world::get(const Func& func) const {
static_assert(arity<Func>::value == 1, "singleton component must be the only argument");
_::entity_with_delegate<Func>::invoke_get(
this->m_world, this->singleton<first_arg_t<Func>>(), func);
}
template <typename Func, if_t< is_callable<Func>::value > >
inline void world::set(const Func& func) const {
static_assert(arity<Func>::value == 1, "singleton component must be the only argument");
_::entity_with_delegate<Func>::invoke_get_mut(
this->m_world, this->singleton<first_arg_t<Func>>(), func);
}
inline flecs::entity world::get_alive(flecs::entity_t e) const {
e = ecs_get_alive(m_world, e);
return flecs::entity(m_world, e);
}
/* Prevent clashing with Unreal define. Unreal applications will have to use
* ecs_ensure. */
#ifndef ensure
inline flecs::entity world::ensure(flecs::entity_t e) const {
ecs_ensure(m_world, e);
return flecs::entity(m_world, e);
}
#endif
template <typename E>
inline flecs::entity enum_data<E>::entity() const {
return flecs::entity(world_, impl_.id);
}
template <typename E>
inline flecs::entity enum_data<E>::entity(int value) const {
return flecs::entity(world_, impl_.constants[value].id);
}
template <typename E>
inline flecs::entity enum_data<E>::entity(E value) const {
return flecs::entity(world_, impl_.constants[static_cast<int>(value)].id);
}
/** Use provided scope for operations ran on returned world.
* Operations need to be ran in a single statement.
*/
inline flecs::scoped_world world::scope(id_t parent) const {
return scoped_world(m_world, parent);
}
template <typename T>
inline flecs::scoped_world world::scope() const {
flecs::id_t parent = _::cpp_type<T>::id(m_world);
return scoped_world(m_world, parent);
}
inline flecs::scoped_world world::scope(const char* name) const {
return scope(entity(name));
}
} // namespace flecs
/**
* @defgroup cpp_core Core
* Core ECS functionality (entities, storage, queries)
*
* @{
* @}
*/
/**
* @defgroup cpp_addons Addons
* C++ APIs for addons.
*
* @{
* @}
*/
/** @} */
#endif // __cplusplus
#endif // FLECS_CPP
#endif
#endif