flecs_cpp.h

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#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(
    /* If symbol_name is NULL, the function allocates a buffer with ecs_os_malloc().
     * Callers must free the returned pointer with ecs_os_free(). */
    char *symbol_name,
    const char *type_name,
    /* If len is 0, the function derives it from 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);
 
typedef void (*ecs_cpp_type_action_t)(
    ecs_world_t *world,
    ecs_entity_t component);
 
typedef struct ecs_cpp_component_desc_t {
    ecs_entity_t id;
    int32_t ids_index;
    const char *name;
    const char *cpp_name;
    const char *cpp_symbol;
    size_t size;
    size_t alignment;
    ecs_cpp_type_action_t lifecycle_action;
    ecs_cpp_type_action_t enum_action;
    bool is_component;
    bool explicit_registration;
} ecs_cpp_component_desc_t;

FLECS_API
ecs_entity_t ecs_cpp_component_register(
    ecs_world_t *world,
    const ecs_cpp_component_desc_t *desc);

FLECS_API
void ecs_cpp_enum_init(
    ecs_world_t *world,
    ecs_entity_t id,
    ecs_entity_t underlying_type);

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,
    void *value,
    ecs_entity_t value_type,
    size_t value_size);

typedef struct ecs_cpp_get_mut_t {
    ecs_world_t *world;       
    ecs_stage_t *stage;       
    void *ptr;                
    bool call_modified;       
} ecs_cpp_get_mut_t;

FLECS_API
FLECS_ALWAYS_INLINE ecs_cpp_get_mut_t ecs_cpp_set(
    ecs_world_t *world,
    ecs_entity_t entity,
    ecs_id_t component,
    const void *new_ptr,
    size_t size);

FLECS_API
FLECS_ALWAYS_INLINE ecs_cpp_get_mut_t ecs_cpp_assign(
    ecs_world_t *world,
    ecs_entity_t entity,
    ecs_id_t component,
    const void *new_ptr,
    size_t size);

FLECS_API
FLECS_ALWAYS_INLINE ecs_entity_t ecs_cpp_new(
    ecs_world_t *world,
    ecs_entity_t parent,
    const char *name,
    const char *sep,
    const char *root_sep);
 
#ifdef FLECS_META
FLECS_API
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