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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* 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 General Public License for more details.
*
* You should have received a copy of the GNU 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 "common/lua/lua.h"
#include "common/lua/lauxlib.h"
#include "common/lua/lualib.h"
#include "common/debug.h"
#include "hdb/lua-script.h"
namespace HDB {
LuaScript::LuaScript() {
_state = NULL;
_systemInit = false;
}
LuaScript::~LuaScript() {
if (_state) {
lua_close(_state);
}
}
bool LuaScript::init() {
// Create new lua_State and initialize the Std Libs
_state = luaL_newstate();
if (!_state || !registerStdLibs()) {
error("Cannot initialize Lua");
return false;
}
_systemInit = true;
return true;
}
bool LuaScript::executeFile(const Common::String &filename) {
if (!_systemInit) {
return false;
}
Common::File *file = new Common::File;
if (!file->open(filename)) {
error("Cannot find \"%s\"", filename.c_str());
}
uint fileSize = file->size();
const char *fileData = new char[fileSize];
file->read((void *)fileData, fileSize);
if (!executeChunk(fileData, fileSize, filename)) {
delete[] fileData;
delete file;
return false;
}
delete[] fileData;
delete file;
return true;
}
bool LuaScript::registerStdLibs() {
luaL_openlibs(_state);
return true;
}
bool LuaScript::executeChunk(const char *chunk, uint chunkSize, const Common::String &chunkName) const {
if (!_systemInit) {
return false;
}
// Compile Chunk
if (luaL_loadbuffer(_state, chunk, chunkSize, chunkName.c_str())) {
error("Couldn't compile \"%s\": %s", chunkName.c_str(), lua_tostring(_state, -1));
lua_pop(_state, -1);
return false;
}
// Execute Chunk
if (lua_pcall(_state, 0, 0, 0)) {
error("An error occured while executing \"%s\": %s.", chunkName.c_str(), lua_tostring(_state, -1));
lua_pop(_state, -1);
return false;
}
debug("Chunk successfully executed");
return true;
}
}
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