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/*
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 "content/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 = readParam<std::string>(L, -1);
ModMetadata *store = nullptr;
if (IGameDef *gamedef = getGameDef(L)) {
store = new ModMetadata(mod_name, gamedef->getModStorageDatabase());
if (gamedef->registerModStorage(store)) {
StorageRef::create(L, store);
int object = lua_gettop(L);
lua_pushvalue(L, object);
return 1;
}
} else {
assert(false); // this should not happen
}
delete store;
lua_pushnil(L);
return 1;
}
void ModApiStorage::Initialize(lua_State *L, int top)
{
API_FCT(get_mod_storage);
}
StorageRef::StorageRef(ModMetadata *object):
m_object(object)
{
}
StorageRef::~StorageRef()
{
delete m_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 (IGameDef *gamedef = getGameDef(L))
gamedef->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_pushliteral(L, "__eq");
lua_pushcfunction(L, l_equals);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_register(L, nullptr, methods); // 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
}
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, contains),
luamethod(MetaDataRef, get),
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),
luamethod(MetaDataRef, equals),
{0,0}
};
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