mirror of
https://github.com/minetest/minetest.git
synced 2024-11-15 20:23:44 +01:00
339 lines
8.7 KiB
C++
339 lines
8.7 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "lua_api/l_nodemeta.h"
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#include "lua_api/l_internal.h"
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#include "lua_api/l_inventory.h"
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#include "common/c_converter.h"
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#include "common/c_content.h"
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#include "environment.h"
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#include "map.h"
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#include "nodemetadata.h"
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/*
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NodeMetaRef
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*/
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NodeMetaRef* NodeMetaRef::checkobject(lua_State *L, int narg)
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{
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luaL_checktype(L, narg, LUA_TUSERDATA);
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void *ud = luaL_checkudata(L, narg, className);
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if(!ud) luaL_typerror(L, narg, className);
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return *(NodeMetaRef**)ud; // unbox pointer
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}
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NodeMetadata* NodeMetaRef::getmeta(NodeMetaRef *ref, bool auto_create)
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{
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NodeMetadata *meta = ref->m_env->getMap().getNodeMetadata(ref->m_p);
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if(meta == NULL && auto_create) {
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meta = new NodeMetadata(ref->m_env->getGameDef());
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if(!ref->m_env->getMap().setNodeMetadata(ref->m_p, meta)) {
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delete meta;
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return NULL;
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}
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}
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return meta;
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}
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void NodeMetaRef::reportMetadataChange(NodeMetaRef *ref)
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{
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// NOTE: This same code is in rollback_interface.cpp
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// Inform other things that the metadata has changed
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v3s16 blockpos = getNodeBlockPos(ref->m_p);
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MapEditEvent event;
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event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
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event.p = blockpos;
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ref->m_env->getMap().dispatchEvent(&event);
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// Set the block to be saved
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MapBlock *block = ref->m_env->getMap().getBlockNoCreateNoEx(blockpos);
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if(block)
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block->raiseModified(MOD_STATE_WRITE_NEEDED,
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"NodeMetaRef::reportMetadataChange");
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}
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// Exported functions
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// garbage collector
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int NodeMetaRef::gc_object(lua_State *L) {
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NodeMetaRef *o = *(NodeMetaRef **)(lua_touserdata(L, 1));
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delete o;
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return 0;
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}
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// get_string(self, name)
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int NodeMetaRef::l_get_string(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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std::string name = luaL_checkstring(L, 2);
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NodeMetadata *meta = getmeta(ref, false);
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if(meta == NULL){
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lua_pushlstring(L, "", 0);
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return 1;
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}
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std::string str = meta->getString(name);
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lua_pushlstring(L, str.c_str(), str.size());
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return 1;
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}
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// set_string(self, name, var)
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int NodeMetaRef::l_set_string(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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std::string name = luaL_checkstring(L, 2);
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size_t len = 0;
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const char *s = lua_tolstring(L, 3, &len);
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std::string str(s, len);
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NodeMetadata *meta = getmeta(ref, !str.empty());
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if(meta == NULL || str == meta->getString(name))
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return 0;
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meta->setString(name, str);
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reportMetadataChange(ref);
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return 0;
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}
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// get_int(self, name)
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int NodeMetaRef::l_get_int(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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std::string name = lua_tostring(L, 2);
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NodeMetadata *meta = getmeta(ref, false);
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if(meta == NULL){
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lua_pushnumber(L, 0);
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return 1;
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}
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std::string str = meta->getString(name);
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lua_pushnumber(L, stoi(str));
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return 1;
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}
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// set_int(self, name, var)
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int NodeMetaRef::l_set_int(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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std::string name = lua_tostring(L, 2);
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int a = lua_tointeger(L, 3);
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std::string str = itos(a);
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NodeMetadata *meta = getmeta(ref, true);
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if(meta == NULL || str == meta->getString(name))
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return 0;
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meta->setString(name, str);
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reportMetadataChange(ref);
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return 0;
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}
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// get_float(self, name)
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int NodeMetaRef::l_get_float(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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std::string name = lua_tostring(L, 2);
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NodeMetadata *meta = getmeta(ref, false);
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if(meta == NULL){
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lua_pushnumber(L, 0);
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return 1;
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}
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std::string str = meta->getString(name);
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lua_pushnumber(L, stof(str));
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return 1;
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}
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// set_float(self, name, var)
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int NodeMetaRef::l_set_float(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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std::string name = lua_tostring(L, 2);
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float a = lua_tonumber(L, 3);
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std::string str = ftos(a);
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NodeMetadata *meta = getmeta(ref, true);
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if(meta == NULL || str == meta->getString(name))
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return 0;
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meta->setString(name, str);
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reportMetadataChange(ref);
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return 0;
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}
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// get_inventory(self)
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int NodeMetaRef::l_get_inventory(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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getmeta(ref, true); // try to ensure the metadata exists
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InvRef::createNodeMeta(L, ref->m_p);
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return 1;
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}
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// to_table(self)
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int NodeMetaRef::l_to_table(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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NodeMetadata *meta = getmeta(ref, true);
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if(meta == NULL){
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lua_pushnil(L);
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return 1;
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}
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lua_newtable(L);
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// fields
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lua_newtable(L);
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{
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std::map<std::string, std::string> fields = meta->getStrings();
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for(std::map<std::string, std::string>::const_iterator
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i = fields.begin(); i != fields.end(); i++){
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const std::string &name = i->first;
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const std::string &value = i->second;
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lua_pushlstring(L, name.c_str(), name.size());
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lua_pushlstring(L, value.c_str(), value.size());
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lua_settable(L, -3);
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}
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}
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lua_setfield(L, -2, "fields");
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// inventory
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lua_newtable(L);
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Inventory *inv = meta->getInventory();
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if(inv){
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std::vector<const InventoryList*> lists = inv->getLists();
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for(std::vector<const InventoryList*>::const_iterator
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i = lists.begin(); i != lists.end(); i++){
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push_inventory_list(L, inv, (*i)->getName().c_str());
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lua_setfield(L, -2, (*i)->getName().c_str());
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}
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}
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lua_setfield(L, -2, "inventory");
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return 1;
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}
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// from_table(self, table)
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int NodeMetaRef::l_from_table(lua_State *L)
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{
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NodeMetaRef *ref = checkobject(L, 1);
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int base = 2;
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// clear old metadata first
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ref->m_env->getMap().removeNodeMetadata(ref->m_p);
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if(lua_isnil(L, base)){
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// No metadata
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lua_pushboolean(L, true);
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return 1;
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}
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// Create new metadata
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NodeMetadata *meta = getmeta(ref, true);
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if(meta == NULL){
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lua_pushboolean(L, false);
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return 1;
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}
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// Set fields
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lua_getfield(L, base, "fields");
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int fieldstable = lua_gettop(L);
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lua_pushnil(L);
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while(lua_next(L, fieldstable) != 0){
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// key at index -2 and value at index -1
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std::string name = lua_tostring(L, -2);
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size_t cl;
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const char *cs = lua_tolstring(L, -1, &cl);
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std::string value(cs, cl);
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meta->setString(name, value);
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lua_pop(L, 1); // removes value, keeps key for next iteration
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}
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// Set inventory
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Inventory *inv = meta->getInventory();
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lua_getfield(L, base, "inventory");
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int inventorytable = lua_gettop(L);
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lua_pushnil(L);
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while(lua_next(L, inventorytable) != 0){
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// key at index -2 and value at index -1
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std::string name = lua_tostring(L, -2);
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read_inventory_list(L, -1, inv, name.c_str(), getServer(L));
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lua_pop(L, 1); // removes value, keeps key for next iteration
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}
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reportMetadataChange(ref);
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lua_pushboolean(L, true);
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return 1;
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}
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NodeMetaRef::NodeMetaRef(v3s16 p, ServerEnvironment *env):
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m_p(p),
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m_env(env)
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{
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}
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NodeMetaRef::~NodeMetaRef()
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{
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}
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// Creates an NodeMetaRef and leaves it on top of stack
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// Not callable from Lua; all references are created on the C side.
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void NodeMetaRef::create(lua_State *L, v3s16 p, ServerEnvironment *env)
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{
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NodeMetaRef *o = new NodeMetaRef(p, env);
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//infostream<<"NodeMetaRef::create: o="<<o<<std::endl;
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*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
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luaL_getmetatable(L, className);
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lua_setmetatable(L, -2);
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}
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void NodeMetaRef::Register(lua_State *L)
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{
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lua_newtable(L);
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int methodtable = lua_gettop(L);
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luaL_newmetatable(L, className);
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int metatable = lua_gettop(L);
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lua_pushliteral(L, "__metatable");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable); // hide metatable from Lua getmetatable()
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lua_pushliteral(L, "__index");
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lua_pushvalue(L, methodtable);
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lua_settable(L, metatable);
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lua_pushliteral(L, "__gc");
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lua_pushcfunction(L, gc_object);
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lua_settable(L, metatable);
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lua_pop(L, 1); // drop metatable
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luaL_openlib(L, 0, methods, 0); // fill methodtable
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lua_pop(L, 1); // drop methodtable
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// Cannot be created from Lua
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//lua_register(L, className, create_object);
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}
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const char NodeMetaRef::className[] = "NodeMetaRef";
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const luaL_reg NodeMetaRef::methods[] = {
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luamethod(NodeMetaRef, get_string),
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luamethod(NodeMetaRef, set_string),
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luamethod(NodeMetaRef, get_int),
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luamethod(NodeMetaRef, set_int),
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luamethod(NodeMetaRef, get_float),
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luamethod(NodeMetaRef, set_float),
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luamethod(NodeMetaRef, get_inventory),
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luamethod(NodeMetaRef, to_table),
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luamethod(NodeMetaRef, from_table),
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{0,0}
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};
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