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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,252 @@ | ||
| /* | ||
| Minetest | ||
| Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com> | ||
| 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_metadata.h" | ||
| #include "lua_api/l_internal.h" | ||
| #include "common/c_content.h" | ||
| #include "serverenvironment.h" | ||
| #include "map.h" | ||
| #include "server.h" | ||
|
|
||
| // LUALIB_API | ||
| void *luaL_checkudata_is_metadataref(lua_State *L, int ud) { | ||
| void *p = lua_touserdata(L, ud); | ||
| if (p != NULL && // value is a userdata? | ||
| lua_getmetatable(L, ud)) { // does it have a metatable? | ||
| lua_getfield(L, -1, "metadata_class"); | ||
| if (lua_type(L, -1) == LUA_TSTRING) { // does it have a metadata_class field? | ||
| return p; | ||
| } | ||
| } | ||
| luaL_typerror(L, ud, "MetaDataRef"); | ||
| return NULL; | ||
| } | ||
|
|
||
| MetaDataRef* MetaDataRef::checkobject(lua_State *L, int narg) | ||
| { | ||
| luaL_checktype(L, narg, LUA_TUSERDATA); | ||
| void *ud = luaL_checkudata_is_metadataref(L, narg); | ||
| if (!ud) | ||
| luaL_typerror(L, narg, "MetaDataRef"); | ||
|
|
||
| return *(MetaDataRef**)ud; // unbox pointer | ||
| } | ||
|
|
||
| // Exported functions | ||
|
|
||
| // get_string(self, name) | ||
| int MetaDataRef::l_get_string(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
| std::string name = luaL_checkstring(L, 2); | ||
|
|
||
| Metadata *meta = ref->getmeta(false); | ||
| if (meta == NULL) { | ||
| lua_pushlstring(L, "", 0); | ||
| return 1; | ||
| } | ||
|
|
||
| const std::string &str = meta->getString(name); | ||
| lua_pushlstring(L, str.c_str(), str.size()); | ||
| return 1; | ||
| } | ||
|
|
||
| // set_string(self, name, var) | ||
| int MetaDataRef::l_set_string(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
| std::string name = luaL_checkstring(L, 2); | ||
| size_t len = 0; | ||
| const char *s = lua_tolstring(L, 3, &len); | ||
| std::string str(s, len); | ||
|
|
||
| Metadata *meta = ref->getmeta(!str.empty()); | ||
| if (meta == NULL || str == meta->getString(name)) | ||
| return 0; | ||
|
|
||
| meta->setString(name, str); | ||
| ref->reportMetadataChange(); | ||
| return 0; | ||
| } | ||
|
|
||
| // get_int(self, name) | ||
| int MetaDataRef::l_get_int(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
| std::string name = lua_tostring(L, 2); | ||
|
|
||
| Metadata *meta = ref->getmeta(false); | ||
| if (meta == NULL) { | ||
| lua_pushnumber(L, 0); | ||
| return 1; | ||
| } | ||
|
|
||
| const std::string &str = meta->getString(name); | ||
| lua_pushnumber(L, stoi(str)); | ||
| return 1; | ||
| } | ||
|
|
||
| // set_int(self, name, var) | ||
| int MetaDataRef::l_set_int(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
| std::string name = lua_tostring(L, 2); | ||
| int a = lua_tointeger(L, 3); | ||
| std::string str = itos(a); | ||
|
|
||
| Metadata *meta = ref->getmeta(true); | ||
| if (meta == NULL || str == meta->getString(name)) | ||
| return 0; | ||
|
|
||
| meta->setString(name, str); | ||
| ref->reportMetadataChange(); | ||
| return 0; | ||
| } | ||
|
|
||
| // get_float(self, name) | ||
| int MetaDataRef::l_get_float(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
| std::string name = lua_tostring(L, 2); | ||
|
|
||
| Metadata *meta = ref->getmeta(false); | ||
| if (meta == NULL) { | ||
| lua_pushnumber(L, 0); | ||
| return 1; | ||
| } | ||
|
|
||
| const std::string &str = meta->getString(name); | ||
| lua_pushnumber(L, stof(str)); | ||
| return 1; | ||
| } | ||
|
|
||
| // set_float(self, name, var) | ||
| int MetaDataRef::l_set_float(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
| std::string name = lua_tostring(L, 2); | ||
| float a = lua_tonumber(L, 3); | ||
| std::string str = ftos(a); | ||
|
|
||
| Metadata *meta = ref->getmeta(true); | ||
| if (meta == NULL || str == meta->getString(name)) | ||
| return 0; | ||
|
|
||
| meta->setString(name, str); | ||
| ref->reportMetadataChange(); | ||
| return 0; | ||
| } | ||
|
|
||
| // to_table(self) | ||
| int MetaDataRef::l_to_table(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
|
|
||
| Metadata *meta = ref->getmeta(true); | ||
| if (meta == NULL) { | ||
| lua_pushnil(L); | ||
| return 1; | ||
| } | ||
| lua_newtable(L); | ||
|
|
||
| ref->handleToTable(L, meta); | ||
|
|
||
| return 1; | ||
| } | ||
|
|
||
| // from_table(self, table) | ||
| int MetaDataRef::l_from_table(lua_State *L) | ||
| { | ||
| MAP_LOCK_REQUIRED; | ||
|
|
||
| MetaDataRef *ref = checkobject(L, 1); | ||
| int base = 2; | ||
|
|
||
| ref->clearMeta(); | ||
|
|
||
| if (!lua_istable(L, base)) { | ||
| // No metadata | ||
| lua_pushboolean(L, true); | ||
| return 1; | ||
| } | ||
|
|
||
| // Create new metadata | ||
| Metadata *meta = ref->getmeta(true); | ||
| if (meta == NULL) { | ||
| lua_pushboolean(L, false); | ||
| return 1; | ||
| } | ||
|
|
||
| bool was_successful = ref->handleFromTable(L, base, meta); | ||
| ref->reportMetadataChange(); | ||
| lua_pushboolean(L, was_successful); | ||
| return 1; | ||
| } | ||
|
|
||
| void MetaDataRef::handleToTable(lua_State *L, Metadata *meta) | ||
| { | ||
| lua_newtable(L); | ||
| { | ||
| const StringMap &fields = meta->getStrings(); | ||
| for (StringMap::const_iterator | ||
| it = fields.begin(); it != fields.end(); ++it) { | ||
| const std::string &name = it->first; | ||
| const std::string &value = it->second; | ||
| lua_pushlstring(L, name.c_str(), name.size()); | ||
| lua_pushlstring(L, value.c_str(), value.size()); | ||
| lua_settable(L, -3); | ||
| } | ||
| } | ||
| lua_setfield(L, -2, "fields"); | ||
| } | ||
|
|
||
| bool MetaDataRef::handleFromTable(lua_State *L, int table, Metadata *meta) | ||
| { | ||
| // Set fields | ||
| lua_getfield(L, table, "fields"); | ||
| if (lua_istable(L, -1)) { | ||
| int fieldstable = lua_gettop(L); | ||
| lua_pushnil(L); | ||
| while (lua_next(L, fieldstable) != 0) { | ||
| // key at index -2 and value at index -1 | ||
| std::string name = lua_tostring(L, -2); | ||
| size_t cl; | ||
| const char *cs = lua_tolstring(L, -1, &cl); | ||
| meta->setString(name, std::string(cs, cl)); | ||
| lua_pop(L, 1); // Remove value, keep key for next iteration | ||
| } | ||
| lua_pop(L, 1); | ||
| } | ||
|
|
||
| return true; | ||
| } |
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