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/*
Minetest-c55
Copyright (C) 2011 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 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 "script.h"
#include <cstdarg>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include "log.h"
#include <iostream>
extern "C" {
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
}
LuaError::LuaError(lua_State *L, const std::string &s)
{
m_s = "LuaError: ";
m_s += s + "\n";
m_s += script_get_backtrace(L);
}
std::string script_get_backtrace(lua_State *L)
{
std::string s;
lua_getfield(L, LUA_GLOBALSINDEX, "debug");
if(lua_istable(L, -1)){
lua_getfield(L, -1, "traceback");
if(lua_isfunction(L, -1)){
lua_call(L, 0, 1);
if(lua_isstring(L, -1)){
s += lua_tostring(L, -1);
}
lua_pop(L, 1);
}
else{
lua_pop(L, 1);
}
}
lua_pop(L, 1);
return s;
}
void script_error(lua_State *L, const char *fmt, ...)
{
va_list argp;
va_start(argp, fmt);
char buf[10000];
vsnprintf(buf, 10000, fmt, argp);
va_end(argp);
//errorstream<<"SCRIPT ERROR: "<<buf;
throw LuaError(L, buf);
}
int luaErrorHandler(lua_State *L) {
lua_getfield(L, LUA_GLOBALSINDEX, "debug");
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
return 1;
}
lua_getfield(L, -1, "traceback");
if (!lua_isfunction(L, -1)) {
lua_pop(L, 2);
return 1;
}
lua_pushvalue(L, 1);
lua_pushinteger(L, 2);
lua_call(L, 2, 1);
return 1;
}
bool script_load(lua_State *L, const char *path)
{
infostream<<"Loading and running script from "<<path<<std::endl;
lua_pushcfunction(L, luaErrorHandler);
int errorhandler = lua_gettop(L);
int ret = luaL_loadfile(L, path) || lua_pcall(L, 0, 0, errorhandler);
if(ret){
errorstream<<"Failed to load and run script from "<<path<<":"<<std::endl;
errorstream<<"[LUA] "<<std::endl;
errorstream<<"[LUA] "<<lua_tostring(L, -1)<<std::endl;
errorstream<<"[LUA] "<<std::endl;
lua_pop(L, 1); // Pop error message from stack
lua_pop(L, 1); // Pop the error handler from stack
return false;
}
lua_pop(L, 1); // Pop the error handler from stack
return true;
}
lua_State* script_init()
{
lua_State *L = luaL_newstate();
luaL_openlibs(L);
return L;
}
void script_deinit(lua_State *L)
{
lua_close(L);
}
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