code: armageddon

CMakeLists.txt

@@ -9,7 +9,7 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE ${CMAKE_BINARY_DIR})
 
 include_directories(eco2d-cli code/vendors code/common)
 include_directories(eco2d-client code/vendors code/common)
-include_directories(eco2d-server code/vendors code/common)
+include_directories(eco2d-server code/vendors code/vendors/flecs code/common)
 
 add_subdirectory(code/apps/client)
 add_subdirectory(code/apps/server)

code/apps/server/CMakeLists.txt

@@ -12,12 +12,16 @@ add_executable(eco2d-server
   header/world/world.h
   header/world/blocks.h
   header/world/blocks_info.h
+  header/components/general.h
+  header/components/net.h
 
   ../../vendors/cwpack/cwpack.c
   ../../vendors/cwpack/cwpack.h
 
   ../../vendors/flecs/flecs.c
   ../../vendors/flecs/flecs.h
+  ../../vendors/flecs/flecs_meta.c
+  ../../vendors/flecs/flecs_meta.h
 )
 
 include_directories(eco2d-server header)

code/apps/server/header/components.h

@@ -1,24 +0,0 @@
-#pragma once
-#include "flecs/flecs.h"
-
-typedef struct {
-    int16_t x, y;
-} chunk;
-
-typedef struct {
-    float x, y;
-} position;
-
-typedef struct {
-    uint16_t peer_id;
-} netclient;
-
-ECS_COMPONENT_DECLARE(chunk);
-ECS_COMPONENT_DECLARE(position);
-ECS_COMPONENT_DECLARE(netclient);
-
-static inline void components_register(ecs_world_t *ecs) {
-    ECS_COMPONENT_DEFINE(ecs, chunk);
-    ECS_COMPONENT_DEFINE(ecs, position);
-    ECS_COMPONENT_DEFINE(ecs, netclient);
-}

code/apps/server/header/components/general.h

@@ -0,0 +1,36 @@
+#pragma once
+#include "flecs/flecs.h"
+#include "flecs/flecs_meta.h"
+
+ECS_STRUCT(Chunk, {
+    int16_t x;
+    int16_t y;
+});
+
+ECS_STRUCT(Position, {
+    int16_t x;
+    int16_t y;
+});
+
+typedef struct {
+    ECS_DECLARE_COMPONENT(Chunk);
+    ECS_DECLARE_COMPONENT(Position);
+} Common;
+
+#define CommonImportHandles(handles)\
+    ECS_IMPORT_COMPONENT(handles, Chunk);\
+    ECS_IMPORT_COMPONENT(handles, Position);
+
+static inline void CommonImport(ecs_world_t *ecs) {
+    ECS_MODULE(ecs, Common);
+
+    ecs_set_name_prefix(ecs, "Common");
+
+    ECS_IMPORT(ecs, FlecsMeta);
+
+    ECS_META(ecs, Chunk);
+    ECS_META(ecs, Position);
+
+    ECS_EXPORT_COMPONENT(Chunk);
+    ECS_EXPORT_COMPONENT(Position);
+}

code/apps/server/header/components/net.h

@@ -0,0 +1,26 @@
+#pragma once
+#include "flecs/flecs.h"
+#include "flecs/flecs_meta.h"
+
+ECS_STRUCT(NetClient, {
+    uint16_t peer_id;
+});
+
+typedef struct {
+    ECS_DECLARE_COMPONENT(NetClient);
+} Net;
+
+#define NetImportHandles(handles)\
+    ECS_IMPORT_COMPONENT(handles, NetClient);\
+
+static inline void NetImport(ecs_world_t *ecs) {
+    ECS_MODULE(ecs, Net);
+
+    ecs_set_name_prefix(ecs, "Net");
+
+    ECS_IMPORT(ecs, FlecsMeta);
+
+    ECS_META(ecs, NetClient);
+
+    ECS_EXPORT_COMPONENT(NetClient);
+}

code/apps/server/source/network.c

@@ -9,9 +9,11 @@
 
 #include "system.h"
 #include "network.h"
-#include "components.h"
 #include "world/world.h"
 
+#include "components/general.h"
+#include "components/net.h"
+
 #define NETWORK_UPDATE_DELAY 0.100
 #define NETWORK_MAX_CLIENTS 32
 
@@ -59,6 +61,9 @@ int32_t network_server_stop(void) {
 }
 
 int32_t network_server_tick(void) {
+    ECS_IMPORT(world_ecs(), Common);
+    ECS_IMPORT(world_ecs(), Net);
+
     ENetEvent event = {0};
     while (enet_host_service(server, &event, 1) > 0) {
         switch (event.type) {
@@ -67,8 +72,8 @@ int32_t network_server_tick(void) {
                 uint16_t peer_id = event.peer->incomingPeerID;
 
                 ecs_entity_t e = ecs_new(world_ecs(), 0);
-                ecs_set(world_ecs(), e, position, {0, 0});
-                ecs_set(world_ecs(), e, netclient, {peer_id});
+                ecs_set(world_ecs(), e, Position, {0, 0});
+                ecs_set(world_ecs(), e, NetClient, {peer_id});
 
                 event.peer->data = (void*)((uint32_t)e);
 

code/apps/server/source/world/world.c

@@ -1,6 +1,6 @@
 #include "zpl.h"
 #include "librg.h"
-#include "components.h"
+#include "components/general.h"
 #include "world/world.h"
 
 typedef struct {
@@ -69,7 +69,6 @@ int32_t world_init(int32_t seed, uint16_t block_size, uint16_t chunk_size, uint1
     }
 
     world.ecs = ecs_init();
-    components_register(world.ecs);
 
     world.tracker = librg_world_create();
 
@@ -85,17 +84,17 @@ int32_t world_init(int32_t seed, uint16_t block_size, uint16_t chunk_size, uint1
     librg_config_chunkamount_set(world.tracker, world_size, world_size, 1);
     librg_config_chunkoffset_set(world.tracker, LIBRG_OFFSET_MID, LIBRG_OFFSET_MID, LIBRG_OFFSET_MID);
 
+    ECS_IMPORT(world.ecs, Common);
+
     for (int i = 0; i < chunk_size * chunk_size; ++i) {
         ecs_entity_t e = ecs_new(world.ecs, 0);
-        ecs_set(world.ecs, e, chunk, {
+        ecs_set(world.ecs, e, Chunk, {
             .x = i % chunk_size,
             .y = i / chunk_size,
         });
 
         librg_entity_track(world.tracker, e);
         librg_entity_chunk_set(world.tracker, e, i);
-
-        zpl_printf("creating chunk: #%lld %d %d\n", e, i % chunk_size, i / chunk_size);
     }
 
     // librg_event_set(world.tracker, LIBRG_WRITE_UPDATE, world_write_update);

code/vendors/flecs/flecs_meta.h

@@ -0,0 +1,688 @@
+#define flecs_meta_STATIC
+#ifndef FLECS_META_H
+#define FLECS_META_H
+
+/* This generated file contains includes for project dependencies */
+/*
+                                   )
+                                  (.)
+                                  .|.
+                                  | |
+                              _.--| |--._
+                           .-';  ;`-'& ; `&.
+                          \   &  ;    &   &_/
+                           |"""---...---"""|
+                           \ | | | | | | | /
+                            `---.|.|.|.---'
+
+ * 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_META_BAKE_CONFIG_H
+#define FLECS_META_BAKE_CONFIG_H
+
+/* Headers of public dependencies */
+#include <flecs.h>
+
+/* Convenience macro for exporting symbols */
+#ifndef flecs_meta_STATIC
+#if flecs_meta_EXPORTS && (defined(_MSC_VER) || defined(__MINGW32__))
+  #define FLECS_META_API __declspec(dllexport)
+#elif flecs_meta_EXPORTS
+  #define FLECS_META_API __attribute__((__visibility__("default")))
+#elif defined _MSC_VER
+  #define FLECS_META_API __declspec(dllimport)
+#else
+  #define FLECS_META_API
+#endif
+#else
+  #define FLECS_META_API
+#endif
+
+#endif
+
+
+#ifndef FLECS_LEGACY
+////////////////////////////////////////////////////////////////////////////////
+//// Utility macro's (do not use in code!)
+////////////////////////////////////////////////////////////////////////////////
+
+#define ECS_ENUM_BOOTSTRAP(name, ...)\
+typedef enum name __VA_ARGS__ name;\
+ECS_UNUSED \
+static const char * __##name##__ = #__VA_ARGS__
+
+#define ECS_STRUCT_IMPL(name, descriptor, ...)\
+typedef struct name __VA_ARGS__ name;\
+ECS_UNUSED \
+static EcsMetaType __##name##__ = {EcsStructType, sizeof(name), ECS_ALIGNOF(name), descriptor, NULL}\
+
+#define ECS_ENUM_IMPL(name, descriptor, ...)\
+typedef enum name __VA_ARGS__ name;\
+ECS_UNUSED \
+static EcsMetaType __##name##__ = {EcsEnumType, sizeof(name), ECS_ALIGNOF(name), descriptor, NULL}
+
+#define ECS_BITMASK_IMPL(name, descriptor, ...)\
+typedef enum name __VA_ARGS__ name;\
+ECS_UNUSED \
+static EcsMetaType __##name##__ = {EcsBitmaskType, sizeof(name), ECS_ALIGNOF(name), descriptor, NULL}
+
+#define ECS_STRUCT_C(T, ...) ECS_STRUCT_IMPL(T, #__VA_ARGS__, __VA_ARGS__)
+#define ECS_ENUM_C(T, ...) ECS_ENUM_IMPL(T, #__VA_ARGS__, __VA_ARGS__)
+#define ECS_BITMASK_C(T, ...) ECS_BITMASK_IMPL(T, #__VA_ARGS__, __VA_ARGS__)
+
+#define ECS_ARRAY(name, T, length)\
+typedef T name[length];\
+ECS_UNUSED \
+static EcsMetaType __##name##__ = {EcsArrayType, sizeof(T) * length, ECS_ALIGNOF(T), "(" #T "," #length ")", NULL}
+
+#define ECS_VECTOR(name, T)\
+typedef ecs_vector_t *name;\
+ECS_UNUSED \
+static EcsMetaType __##name##__ = {EcsVectorType, sizeof(ecs_vector_t*), ECS_ALIGNOF(ecs_vector_t*), "(" #T ")", NULL}
+
+#define ECS_MAP(name, K, T)\
+typedef ecs_map_t *name;\
+ECS_UNUSED \
+static EcsMetaType __##name##__ = {EcsMapType, sizeof(ecs_map_t*), ECS_ALIGNOF(ecs_map_t*), "(" #K "," #T ")", NULL}
+
+#ifdef __cplusplus
+
+// Unspecialized class (see below)
+namespace flecs {
+template <typename T>
+class __meta__ { };    
+}
+
+// Specialized C++ class that stores name and descriptor of type
+#define ECS_META_CPP(T, kind, descr);\
+namespace flecs {\
+template<>\
+class __meta__ <T> {\
+public:\
+    static const char* name() {\
+        return #T;\
+    }\
+    static EcsMetaType descriptor() {\
+        return {kind, sizeof(T), ECS_ALIGNOF(T), descr, NULL};\
+    }\
+};\
+}
+
+#endif
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Use these macro's to define types.
+////   The API will automatically select the right macro's for C or C++
+////////////////////////////////////////////////////////////////////////////////
+
+#ifdef __cplusplus
+
+// C++ 
+
+// Define a struct
+#define ECS_STRUCT(T, ...)\
+    ECS_STRUCT_IMPL(T, #__VA_ARGS__, __VA_ARGS__);\
+    ECS_META_CPP(T, EcsStructType, #__VA_ARGS__)
+
+// Define an enumeration
+#define ECS_ENUM(T, ...)\
+    ECS_ENUM_IMPL(T, #__VA_ARGS__, __VA_ARGS__);\
+    ECS_META_CPP(T, EcsEnumType, #__VA_ARGS__);
+
+// Define a bitmask
+#define ECS_BITMASK(T, ...)\
+    ECS_BITMASK_IMPL(T, #__VA_ARGS__, __VA_ARGS__);\
+    ECS_META_CPP(T, EcsBitmaskType, #__VA_ARGS__)
+
+#else
+
+// C
+
+// Define a struct
+#define ECS_STRUCT(name, ...)\
+    ECS_STRUCT_IMPL(name, #__VA_ARGS__, __VA_ARGS__)
+
+// Define an enumeration
+#define ECS_ENUM(name, ...)\
+    ECS_ENUM_IMPL(name, #__VA_ARGS__, __VA_ARGS__)
+
+// Define a bitmask
+#define ECS_BITMASK(name, ...)\
+    ECS_BITMASK_IMPL(name, #__VA_ARGS__, __VA_ARGS__)
+
+// Define a type alias
+#define ECS_ALIAS(type, name)\
+    typedef type name;\
+    ECS_UNUSED \
+    static EcsMetaType __##name##__ = {0, sizeof(name), ECS_ALIGNOF(name), NULL, &__##type##__};\
+
+#endif
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Use these macro's inside types
+////////////////////////////////////////////////////////////////////////////////
+
+// Define a vector
+#define ecs_vector(T) ecs_vector_t*
+
+// Define a map
+#define ecs_map(K, T) ecs_map_t*
+
+// Indicate that members after this should not be serialized
+#define ECS_PRIVATE
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Meta description types
+////////////////////////////////////////////////////////////////////////////////
+
+/* Explicit string type */
+typedef const char* ecs_string_t;
+
+/* Explicit byte type */
+typedef uint8_t ecs_byte_t;
+
+#ifdef __cplusplus
+
+namespace flecs {
+    using string = ecs_string_t;
+    using byte = ecs_byte_t;
+
+    // Define a bitmask
+    // In C++ trying to assign multiple flags to a variable of an enum type will
+    // result in a compiler error. Use this template so that the serializer knows 
+    // this value is a bitmask, while also keeping the compiler happy.
+    template<typename T>
+    using bitmask = int32_t;
+}
+
+#endif
+
+ECS_ENUM_BOOTSTRAP( ecs_type_kind_t, {
+    EcsPrimitiveType,
+    EcsBitmaskType,
+    EcsEnumType,
+    EcsStructType,
+    EcsArrayType,
+    EcsVectorType,
+    EcsMapType
+});
+
+ECS_STRUCT( EcsMetaType, {
+    ecs_type_kind_t kind;
+    ecs_size_t size;
+    int16_t alignment;
+    const char *descriptor;
+    void *alias;
+});
+
+ECS_ENUM( ecs_primitive_kind_t, {
+    EcsBool,
+    EcsChar,
+    EcsByte,
+    EcsU8,
+    EcsU16,
+    EcsU32,
+    EcsU64,
+    EcsI8,
+    EcsI16,
+    EcsI32,
+    EcsI64,
+    EcsF32,
+    EcsF64,
+    EcsUPtr,
+    EcsIPtr,
+    EcsString,
+    EcsEntity
+});
+
+ECS_STRUCT( EcsPrimitive, {
+    ecs_primitive_kind_t kind;
+});
+
+// Define EcsBitmask for both C and C++. Both representations are equivalent in
+// memory, but allow for a nicer type-safe API in C++
+#if defined(__cplusplus) && !defined(FLECS_NO_CPP)
+ECS_STRUCT( EcsBitmask, {
+    flecs::map<int32_t, flecs::string> constants;
+});
+#else
+ECS_STRUCT( EcsBitmask, {
+    ecs_map(int32_t, ecs_string_t) constants;
+});
+#endif
+
+// Define EcsEnum for both C and C++. Both representations are equivalent in
+// memory, but allow for a nicer type-safe API in C++
+#if defined(__cplusplus) && !defined(FLECS_NO_CPP)
+ECS_STRUCT( EcsEnum, {
+    flecs::map<int32_t, flecs::string> constants;
+});
+#else
+ECS_STRUCT( EcsEnum, {
+    ecs_map(int32_t, ecs_string_t) constants;
+});
+#endif
+
+ECS_STRUCT( EcsMember, {
+    char *name;
+    ecs_entity_t type;
+});
+
+// Define EcsStruct for both C and C++. Both representations are equivalent in
+// memory, but allow for a nicer type-safe API in C++
+#if defined(__cplusplus) && !defined(FLECS_NO_CPP)
+ECS_STRUCT( EcsStruct, {
+    flecs::vector<EcsMember> members;
+    bool is_partial;
+});
+#else
+ECS_STRUCT( EcsStruct, {
+    ecs_vector(EcsMember) members;
+    bool is_partial;
+});
+#endif
+
+ECS_STRUCT( EcsArray, {
+    ecs_entity_t element_type;
+    int32_t count;
+});
+
+ECS_STRUCT( EcsVector, {
+    ecs_entity_t element_type;
+});
+
+ECS_STRUCT( EcsMap, {
+    ecs_entity_t key_type;
+    ecs_entity_t element_type;
+});
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Type serializer
+////////////////////////////////////////////////////////////////////////////////
+
+ECS_ENUM_C( ecs_type_op_kind_t, {
+    EcsOpHeader,
+    EcsOpPrimitive,
+    EcsOpEnum,
+    EcsOpBitmask,
+    EcsOpPush,
+    EcsOpPop,
+    EcsOpArray,
+    EcsOpVector,
+    EcsOpMap
+});
+
+typedef ecs_vector_t ecs_type_op_vector_t;
+typedef ecs_vector_t ecs_constant_vector_t;
+
+ECS_STRUCT_C( ecs_type_op_t, {
+    ecs_entity_t type;
+    ecs_type_op_kind_t kind;
+    ecs_size_t size;      /* Size of value or element type if array or vector */
+    int16_t alignment; /* Alignment of value */
+    int32_t count;        /* Number of elements (only used for arrays) */
+    int32_t offset;       /* Offset of value */
+    const char *name;     /* Name of value (only used for struct members) */
+
+ECS_PRIVATE
+
+    /* Instruction-specific data */
+    union {
+        ecs_primitive_kind_t primitive;
+        ecs_ref_t constant;
+        ecs_ref_t collection;
+
+        struct {
+            ecs_ref_t key;
+            ecs_ref_t element;
+        } map;
+    } is;
+});
+
+ECS_STRUCT_C( EcsMetaTypeSerializer, {
+    ecs_vector(ecs_type_op_t) ops;
+});
+
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Pretty printer
+////////////////////////////////////////////////////////////////////////////////
+
+/** Convert value to a string. */
+FLECS_META_API
+char* ecs_ptr_to_str(
+    ecs_world_t *world, 
+    ecs_entity_t type, 
+    void* ptr);
+
+/** Convert value to a string. */
+FLECS_META_API
+char* ecs_entity_to_str(
+    ecs_world_t *world, 
+    ecs_entity_t entity);
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Serialization utilities
+////////////////////////////////////////////////////////////////////////////////
+
+#define ECS_MAX_I8 127
+#define ECS_MIN_I8 -128
+
+#define ECS_MAX_I16 32767
+#define ECS_MIN_I16 -32768
+
+#define ECS_MAX_I32 2147483647
+#define ECS_MIN_I32 -2147483648
+
+#define ECS_MAX_I64 9223372036854775807
+#define ECS_MIN_I64 (-9223372036854775807 - 1)
+
+#define ECS_MAX_U8 255u
+#define ECS_MAX_U16 65535u
+#define ECS_MAX_U32 4294967295u
+#define ECS_MAX_U64 18446744073709551615u
+
+#define ECS_MAX_I8_STR "127"
+#define ECS_MIN_I8_STR "-128"
+
+#define ECS_MAX_I16_STR "32767"
+#define ECS_MIN_I16_STR "-32768"
+
+#define ECS_MAX_I32_STR "2147483647"
+#define ECS_MIN_I32_STR "-2147483648"
+
+#define ECS_MAX_I64_STR "9223372036854775807"
+#define ECS_MIN_I64_STR "-9223372036854775808"
+
+#define ECS_MAX_U8_STR "255"
+#define ECS_MAX_U16_STR "65535"
+#define ECS_MAX_U32_STR "4294967295"
+#define ECS_MAX_U64_STR "18446744073709551615"
+
+/** Escape a character */
+FLECS_META_API
+char* ecs_chresc(
+    char *out, 
+    char in, 
+    char delimiter);
+
+/** Parse an escaped character */
+FLECS_META_API
+const char* ecs_chrparse(
+    const char *in, 
+    char *out);
+
+/** Escape a string */
+FLECS_META_API
+ecs_size_t ecs_stresc(
+    char *out, 
+    ecs_size_t n, 
+    char delimiter, 
+    const char *in);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Deserialization API
+////////////////////////////////////////////////////////////////////////////////
+
+#define ECS_META_MAX_SCOPE_DEPTH (32) /* >32 levels of nesting is not sane */
+
+typedef struct ecs_meta_scope_t {
+    ecs_entity_t type;
+    ecs_vector_t *ops;
+    int32_t start;
+    int32_t cur_op;
+    int32_t cur_elem;
+    int32_t count;
+    void *base;
+    ecs_vector_t *vector;
+    bool is_collection;
+} ecs_meta_scope_t;
+
+typedef struct ecs_meta_cursor_t {
+    ecs_world_t *world;
+    ecs_meta_scope_t scope[ECS_META_MAX_SCOPE_DEPTH];
+    int32_t depth;
+} ecs_meta_cursor_t;
+
+FLECS_META_API
+ecs_meta_cursor_t ecs_meta_cursor(
+    ecs_world_t *world,
+    ecs_entity_t type, 
+    void *base);
+
+FLECS_META_API
+void* ecs_meta_get_ptr(
+    ecs_meta_cursor_t *cursor);
+
+FLECS_META_API
+int ecs_meta_next(
+    ecs_meta_cursor_t *cursor);
+
+FLECS_META_API
+int ecs_meta_move(
+    ecs_meta_cursor_t *cursor,
+    int32_t pos);
+
+FLECS_META_API
+int ecs_meta_move_name(
+    ecs_meta_cursor_t *cursor,
+    const char *name);
+
+FLECS_META_API
+int ecs_meta_push(
+    ecs_meta_cursor_t *cursor);
+
+FLECS_META_API
+int ecs_meta_pop(
+    ecs_meta_cursor_t *cursor);
+
+FLECS_META_API
+int ecs_meta_set_bool(
+    ecs_meta_cursor_t *cursor,
+    bool value);
+
+FLECS_META_API
+int ecs_meta_set_char(
+    ecs_meta_cursor_t *cursor,
+    char value);
+
+FLECS_META_API
+int ecs_meta_set_int(
+    ecs_meta_cursor_t *cursor,
+    int64_t value);
+
+FLECS_META_API
+int ecs_meta_set_uint(
+    ecs_meta_cursor_t *cursor,
+    uint64_t value);
+
+FLECS_META_API
+int ecs_meta_set_float(
+    ecs_meta_cursor_t *cursor,
+    double value);
+
+FLECS_META_API
+int ecs_meta_set_string(
+    ecs_meta_cursor_t *cursor,
+    const char *value);
+
+FLECS_META_API
+int ecs_meta_set_entity(
+    ecs_meta_cursor_t *cursor,
+    ecs_entity_t value);
+
+FLECS_META_API
+int ecs_meta_set_null(
+    ecs_meta_cursor_t *cursor);
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Module implementation
+////////////////////////////////////////////////////////////////////////////////
+
+typedef struct FlecsMeta {
+    ECS_DECLARE_COMPONENT(EcsPrimitive);
+    ECS_DECLARE_COMPONENT(EcsEnum);
+    ECS_DECLARE_COMPONENT(EcsBitmask);
+    ECS_DECLARE_COMPONENT(EcsStruct);
+    ECS_DECLARE_COMPONENT(EcsArray);
+    ECS_DECLARE_COMPONENT(EcsVector);
+    ECS_DECLARE_COMPONENT(EcsMap);
+    ECS_DECLARE_COMPONENT(EcsMetaType);
+    ECS_DECLARE_COMPONENT(EcsMetaTypeSerializer);
+} FlecsMeta;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+FLECS_META_API
+void FlecsMetaImport(
+    ecs_world_t *world);
+
+#define FlecsMetaImportHandles(handles)\
+    ECS_IMPORT_COMPONENT(handles, EcsPrimitive);\
+    ECS_IMPORT_COMPONENT(handles, EcsEnum);\
+    ECS_IMPORT_COMPONENT(handles, EcsBitmask);\
+    ECS_IMPORT_COMPONENT(handles, EcsStruct);\
+    ECS_IMPORT_COMPONENT(handles, EcsArray);\
+    ECS_IMPORT_COMPONENT(handles, EcsVector);\
+    ECS_IMPORT_COMPONENT(handles, EcsMap);\
+    ECS_IMPORT_COMPONENT(handles, EcsMetaType);\
+    ECS_IMPORT_COMPONENT(handles, EcsMetaTypeSerializer);
+
+////////////////////////////////////////////////////////////////////////////////
+//// Macro for inserting metadata in C application
+////////////////////////////////////////////////////////////////////////////////
+
+FLECS_META_API
+void ecs_new_meta(
+    ecs_world_t *world,
+    ecs_entity_t component,
+    struct EcsMetaType *meta_type);
+
+#define ECS_META(world, T)\
+    ECS_COMPONENT(world, T);\
+    ecs_new_meta(world, ecs_entity(T), &__##T##__);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// C++ Module implementation
+////////////////////////////////////////////////////////////////////////////////
+
+#ifdef __cplusplus
+#ifndef FLECS_NO_CPP
+
+namespace flecs {
+namespace components {
+
+class meta {
+public:
+    using Primitive = EcsPrimitive;
+    using Enum = EcsEnum;
+    using Bitmask = EcsBitmask;
+    using Struct = EcsStruct;
+    using Array = EcsArray;
+    using Vector = EcsVector;
+    using Type = EcsMetaType;
+    using TypeSerializer = EcsMetaTypeSerializer;
+
+    enum TypeKind {
+        PrimitiveType = EcsPrimitiveType,
+        BitmaskType = EcsBitmaskType,
+        EnumType = EcsEnumType,
+        StructType = EcsStructType,
+        ArrayType = EcsArrayType,
+        VectorType = EcsVectorType,
+        MapType = EcsMapType        
+    };
+
+    meta(flecs::world& world) {
+        FlecsMetaImport(world.c_ptr());
+
+        flecs::module<flecs::components::meta>(world, "flecs::components::meta");
+
+        flecs::component<Primitive>(world, "EcsPrimitive");
+        flecs::component<Enum>(world, "EcsEnum");
+        flecs::component<Bitmask>(world, "EcsBitmask");
+        flecs::component<Struct>(world, "EcsStruct");
+        flecs::component<Array>(world, "EcsArray");
+        flecs::component<Vector>(world, "EcsVector");
+        flecs::component<Type>(world, "EcsMetaType");
+        flecs::component<TypeSerializer>(world, "EcsMetaTypeSerializer");
+    }
+};
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//// Functions for inserting metadata in C++ applications
+////////////////////////////////////////////////////////////////////////////////
+
+// Template that injects metadata into ECS
+template <typename T>
+flecs::entity meta(flecs::world& world) {
+    flecs::entity e = flecs::component<T>(world, flecs::__meta__<T>::name());
+    e.set<EcsMetaType>({ flecs::__meta__<T>::descriptor() });
+    return e;
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+//// Serialize values to string
+////////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+std::string pretty_print(flecs::world& world, flecs::entity_t type, T& data) {
+    char *str = ecs_ptr_to_str(world.c_ptr(), type, &data);
+    std::string result = std::string(str);
+    free(str);
+    return result;
+}
+
+template <typename T>
+std::string pretty_print(flecs::world& world, flecs::entity type, T& data) {
+    return pretty_print(world, type.id(), data);
+}
+
+template <typename T>
+std::string pretty_print(flecs::world& world, T& data) {
+    entity_t type = _::component_info<T>::id();
+    return flecs::pretty_print(world, type, data);
+}
+
+template <>
+inline std::string pretty_print<flecs::entity>(flecs::world& world, flecs::entity& entity) {
+    char *str = ecs_entity_to_str(world.c_ptr(), entity.id());
+    std::string result = std::string(str);
+    free(str);
+    return result;
+}
+
+}
+
+#endif // FLECS_NO_CPP
+#endif // __cplusplus
+
+#endif // FLECS_META_H