games/minimal/mods/default/textures/player_back.png

/*
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_nodemeta.h"
#include "lua_api/l_internal.h"
#include "lua_api/l_inventory.h"
#include "common/c_converter.h"
#include "common/c_content.h"
#include "environment.h"
#include "map.h"
#include "nodemetadata.h"


/*
	NodeMetaRef
*/
NodeMetaRef* NodeMetaRef::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 *(NodeMetaRef**)ud;  // unbox pointer
}

NodeMetadata* NodeMetaRef::getmeta(NodeMetaRef *ref, bool auto_create)
{
	NodeMetadata *meta = ref->m_env->getMap().getNodeMetadata(ref->m_p);
	if(meta == NULL && auto_create)	{
		meta = new NodeMetadata(ref->m_env->getGameDef());
		if(!ref->m_env->getMap().setNodeMetadata(ref->m_p, meta)) {
			delete meta;
			return NULL;
		}
	}
	return meta;
}

void NodeMetaRef::reportMetadataChange(NodeMetaRef *ref)
{
	// NOTE: This same code is in rollback_interface.cpp
	// Inform other things that the metadata has changed
	v3s16 blockpos = getNodeBlockPos(ref->m_p);
	MapEditEvent event;
	event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
	event.p = blockpos;
	ref->m_env->getMap().dispatchEvent(&event);
	// Set the block to be saved
	MapBlock *block = ref->m_env->getMap().getBlockNoCreateNoEx(blockpos);
	if(block)
		block->raiseModified(MOD_STATE_WRITE_NEEDED,
				"NodeMetaRef::reportMetadataChange");
}

// Exported functions

// garbage collector
int NodeMetaRef::gc_object(lua_State *L) {
	NodeMetaRef *o = *(NodeMetaRef **)(lua_touserdata(L, 1));
	delete o;
	return 0;
}

// get_string(self, name)
int NodeMetaRef::l_get_string(lua_State *L)
{
	NodeMetaRef *ref = checkobject(L, 1);
	std::string name = luaL_checkstring(L, 2);

	NodeMetadata *meta = getmeta(ref, false);
	if(meta == NULL){
		lua_pushlstring(L, "", 0);
		return 1;
	}
	std::string str = meta->getString(name);
	lua_pushlstring(L, str.c_str(), str.size());
	return 1;
}

// set_string(self, name, var)
int NodeMetaRef::l_set_string(lua_State *L)
{
	NodeMetaRef *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);
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 10 00 00 00 20 08 06 00 00 00 1b 89 f8	.PNG........IHDR................
0020	cc 00 00 00 09 70 48 59 73 00 00 0e c4 00 00 0e c4 01 95 2b 0e 1b 00 00 00 7b 49 44 41 54 48 89	.....pHYs..........+.....{IDATH.
0040	ed 95 dd 0e 80 20 08 85 0f ce 07 e7 cd e9 a6 35 0b 44 62 35 6d 8b 5b 39 1f 7f 8a c0 ab c6 10 30	...............5.Db5m.[9.......0
0060	c4 73 29 61 50 c7 e8 96 88 b5 bf 0d f0 d2 be 40 a8 39 70 6b ed c1 4a 5a ac 32 38 93 c3 25 c4 a6	.s)aP..........@.9pk..JZ.28..%..
0080	e0 d8 7c 40 7e 0a 7b 2f 28 25 6e 20 f3 7b f0 03 d6 03 18 1b 47 d9 d3 af b1 86 23 db d9 48 4d 0a	..\|@~.{/(%n..{......G.....#..HM.
00a0	8f 80 ab 4d e1 93 80 f1 4a 63 90 f7 cd d9 2b cd ba 17 1d c8 06 d9 3a 1d b8 b7 b7 04 23 00 00 00	...M....Jc....+.......:.....#...
00c0	00 49 45 4e 44 ae 42 60 82	.IEND.B`.