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* mod can create a ModMetadata object where store its values and retrieve it. * Modmetadata object can only be fetched at mod loading * Save when modified using same time as map interval or at server stop * add helper function to get mod storage path * ModMetadata has exactly same calls than all every other Metadata
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| /* | ||
| Minetest | ||
| Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com> | ||
| Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr> | ||
| This program is free software; you can redistribute it and/or modify | ||
| it under the terms of the GNU Lesser General Public License as published by | ||
| the Free Software Foundation; either version 2.1 of the License, or | ||
| (at your option) any later version. | ||
| This program is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public License along | ||
| with this program; if not, write to the Free Software Foundation, Inc., | ||
| 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| */ | ||
|
|
||
| #include "lua_api/l_storage.h" | ||
| #include "l_internal.h" | ||
| #include "mods.h" | ||
| #include "server.h" | ||
|
|
||
| int ModApiStorage::l_get_mod_storage(lua_State *L) | ||
| { | ||
| lua_rawgeti(L, LUA_REGISTRYINDEX, CUSTOM_RIDX_CURRENT_MOD_NAME); | ||
| if (!lua_isstring(L, -1)) { | ||
| return 0; | ||
| } | ||
|
|
||
| std::string mod_name = lua_tostring(L, -1); | ||
|
|
||
| ModMetadata *store = new ModMetadata(mod_name); | ||
| // For server side | ||
| if (Server *server = getServer(L)) { | ||
| store->load(server->getModStoragePath()); | ||
| server->registerModStorage(store); | ||
| } else { | ||
| assert(false); // this should not happen | ||
| } | ||
|
|
||
| StorageRef::create(L, store); | ||
| int object = lua_gettop(L); | ||
|
|
||
| lua_pushvalue(L, object); | ||
| return 1; | ||
| } | ||
|
|
||
| void ModApiStorage::Initialize(lua_State *L, int top) | ||
| { | ||
| API_FCT(get_mod_storage); | ||
| } | ||
|
|
||
| StorageRef::StorageRef(ModMetadata *object): | ||
| m_object(object) | ||
| { | ||
| } | ||
|
|
||
| void StorageRef::create(lua_State *L, ModMetadata *object) | ||
| { | ||
| StorageRef *o = new StorageRef(object); | ||
| *(void **)(lua_newuserdata(L, sizeof(void *))) = o; | ||
| luaL_getmetatable(L, className); | ||
| lua_setmetatable(L, -2); | ||
| } | ||
|
|
||
| int StorageRef::gc_object(lua_State *L) | ||
| { | ||
| StorageRef *o = *(StorageRef **)(lua_touserdata(L, 1)); | ||
| // Server side | ||
| if (Server *server = getServer(L)) | ||
| server->unregisterModStorage(getobject(o)->getModName()); | ||
| delete o; | ||
| return 0; | ||
| } | ||
|
|
||
| void StorageRef::Register(lua_State *L) | ||
| { | ||
| lua_newtable(L); | ||
| int methodtable = lua_gettop(L); | ||
| luaL_newmetatable(L, className); | ||
| int metatable = lua_gettop(L); | ||
|
|
||
| lua_pushliteral(L, "__metatable"); | ||
| lua_pushvalue(L, methodtable); | ||
| lua_settable(L, metatable); // hide metatable from Lua getmetatable() | ||
|
|
||
| lua_pushliteral(L, "metadata_class"); | ||
| lua_pushlstring(L, className, strlen(className)); | ||
| lua_settable(L, metatable); | ||
|
|
||
| lua_pushliteral(L, "__index"); | ||
| lua_pushvalue(L, methodtable); | ||
| lua_settable(L, metatable); | ||
|
|
||
| lua_pushliteral(L, "__gc"); | ||
| lua_pushcfunction(L, gc_object); | ||
| lua_settable(L, metatable); | ||
|
|
||
| lua_pop(L, 1); // drop metatable | ||
|
|
||
| luaL_openlib(L, 0, methods, 0); // fill methodtable | ||
| lua_pop(L, 1); // drop methodtable | ||
| } | ||
|
|
||
| StorageRef* StorageRef::checkobject(lua_State *L, int narg) | ||
| { | ||
| luaL_checktype(L, narg, LUA_TUSERDATA); | ||
| void *ud = luaL_checkudata(L, narg, className); | ||
| if (!ud) luaL_typerror(L, narg, className); | ||
| return *(StorageRef**)ud; // unbox pointer | ||
| } | ||
|
|
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| ModMetadata* StorageRef::getobject(StorageRef *ref) | ||
| { | ||
| ModMetadata *co = ref->m_object; | ||
| return co; | ||
| } | ||
|
|
||
| Metadata* StorageRef::getmeta(bool auto_create) | ||
| { | ||
| return m_object; | ||
| } | ||
|
|
||
| void StorageRef::clearMeta() | ||
| { | ||
| m_object->clear(); | ||
| } | ||
|
|
||
| const char StorageRef::className[] = "StorageRef"; | ||
| const luaL_reg StorageRef::methods[] = { | ||
| luamethod(MetaDataRef, get_string), | ||
| luamethod(MetaDataRef, set_string), | ||
| luamethod(MetaDataRef, get_int), | ||
| luamethod(MetaDataRef, set_int), | ||
| luamethod(MetaDataRef, get_float), | ||
| luamethod(MetaDataRef, set_float), | ||
| luamethod(MetaDataRef, to_table), | ||
| luamethod(MetaDataRef, from_table), | ||
| {0,0} | ||
| }; |
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