add yaml serialization library

doc/en/scripting.md

@@ -11,7 +11,7 @@ Subsections:
 - [Libraries](#)
     - [app](scripting/builtins/libapp.md)
     - [base64](scripting/builtins/libbase64.md)
-    - [bjson, json, toml](scripting/filesystem.md)
+    - [bjson, json, toml, yaml](scripting/filesystem.md)
     - [block](scripting/builtins/libblock.md)
     - [byteutil](scripting/builtins/libbyteutil.md)
     - [cameras](scripting/builtins/libcameras.md)

doc/en/scripting/filesystem.md

@@ -36,6 +36,22 @@ toml.parse(code: str) -> table
 
 Parses a TOML string into a table.
 
+## *yaml* library
+
+The library contains functions for serializing and deserializing tables:
+
+```python
+yaml.tostring(object: table) -> str
+```
+
+Serializes an object into a YAML string.
+
+```python
+yaml.parse(code: str) -> table
+```
+
+Parses a YAML string into a table.
+
 ## *bjson* library
 
 The library contains functions for working with the binary data exchange format [vcbjson](../../specs/binary_json_spec.md).

doc/ru/scripting.md

@@ -11,7 +11,7 @@
 - [Библиотеки](#)
     - [app](scripting/builtins/libapp.md)
     - [base64](scripting/builtins/libbase64.md)
-    - [bjson, json, toml](scripting/filesystem.md)
+    - [bjson, json, toml, yaml](scripting/filesystem.md)
     - [block](scripting/builtins/libblock.md)
     - [byteutil](scripting/builtins/libbyteutil.md)
     - [cameras](scripting/builtins/libcameras.md)

doc/ru/scripting/filesystem.md

@@ -36,6 +36,22 @@ toml.parse(code: str) -> table
 
 Парсит TOML строку в таблицу.
 
+## Библиотека yaml
+
+Библиотека содержит функции для сериализации и десериализации таблиц:
+
+```python
+yaml.tostring(object: table) -> str
+```
+
+Сериализует объект в YAML строку.
+
+```python
+yaml.parse(code: str) -> table
+```
+
+Парсит YAML строку в таблицу.
+
 ## Библиотека bjson
 
 Библиотека содержит функции для работы с двоичным форматом обмена данными [vcbjson](../../specs/binary_json_spec.md).

src/logic/scripting/lua/libs/api_lua.hpp

@@ -14,6 +14,7 @@
 ///    int l_function_name(lua::State* L);
 
 // Libraries
+extern const luaL_Reg applib[];
 extern const luaL_Reg audiolib[];
 extern const luaL_Reg base64lib[];
 extern const luaL_Reg bjsonlib[];
@@ -38,7 +39,6 @@ extern const luaL_Reg packlib[];
 extern const luaL_Reg particleslib[]; // gfx.particles
 extern const luaL_Reg playerlib[];
 extern const luaL_Reg quatlib[];
-extern const luaL_Reg applib[];
 extern const luaL_Reg text3dlib[]; // gfx.text3d
 extern const luaL_Reg timelib[];
 extern const luaL_Reg tomllib[];
@@ -48,6 +48,7 @@ extern const luaL_Reg vec3lib[];  // vecn.cpp
 extern const luaL_Reg vec4lib[];  // vecn.cpp
 extern const luaL_Reg weatherlib[];
 extern const luaL_Reg worldlib[];
+extern const luaL_Reg yamllib[];
 
 // Components
 extern const luaL_Reg skeletonlib[];

src/logic/scripting/lua/libs/libjson.cpp

@@ -19,4 +19,5 @@ static int l_json_parse(lua::State* L) {
 const luaL_Reg jsonlib[] = {
     {"tostring", lua::wrap<l_json_stringify>},
     {"parse", lua::wrap<l_json_parse>},
-    {NULL, NULL}};
+    {NULL, NULL}
+};

src/logic/scripting/lua/libs/libyaml.cpp

@@ -0,0 +1,20 @@
+#include "coders/yaml.hpp"
+#include "api_lua.hpp"
+
+static int l_stringify(lua::State* L) {
+    auto value = lua::tovalue(L, 1);
+    auto string = yaml::stringify(value);
+    return lua::pushstring(L, string);
+}
+
+static int l_parse(lua::State* L) {
+    auto string = lua::require_string(L, 1);
+    auto element = yaml::parse("[string]", string);
+    return lua::pushvalue(L, element);
+}
+
+const luaL_Reg yamllib[] = {
+    {"tostring", lua::wrap<l_stringify>},
+    {"parse", lua::wrap<l_parse>},
+    {NULL, NULL}
+};

src/logic/scripting/lua/lua_engine.cpp

@@ -56,6 +56,7 @@ static void create_libs(State* L, StateType stateType) {
     openlib(L, "vec2", vec2lib);
     openlib(L, "vec3", vec3lib);
     openlib(L, "vec4", vec4lib);
+    openlib(L, "yaml", yamllib);
 
     if (stateType == StateType::SCRIPT) {
         openlib(L, "app", applib);