131 lines
3.2 KiB
C++
131 lines
3.2 KiB
C++
/*
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Minetest-c55
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Copyright (C) 2011 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 General Public License as published by
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the Free Software Foundation; either version 2 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 General Public License for more details.
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You should have received a copy of the GNU 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 "script.h"
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#include <cstdarg>
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#include <cstring>
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#include <cstdio>
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#include <cstdlib>
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#include "log.h"
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#include <iostream>
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extern "C" {
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#include <lua.h>
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#include <lualib.h>
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#include <lauxlib.h>
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}
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void script_error(lua_State *L, const char *fmt, ...)
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{
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va_list argp;
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va_start(argp, fmt);
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vfprintf(stderr, fmt, argp);
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va_end(argp);
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lua_close(L);
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exit(EXIT_FAILURE);
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}
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void script_call_va(lua_State *L, const char *func, const char *sig, ...)
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{
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va_list vl;
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int narg, nres; /* number of arguments and results */
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va_start(vl, sig);
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lua_getglobal(L, func); /* push function */
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for (narg = 0; *sig; narg++) {
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/* repeat for each argument */
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/* check stack space */
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luaL_checkstack(L, 1, "too many arguments");
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switch (*sig++) {
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case 'd': /* double argument */
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lua_pushnumber(L, va_arg(vl, double));
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break;
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case 'i': /* int argument */
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lua_pushinteger(L, va_arg(vl, int));
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break;
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case 's': /* string argument */
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lua_pushstring(L, va_arg(vl, char *));
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break;
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case '>': /* end of arguments */
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goto endargs;
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default:
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script_error(L, "invalid option (%c)", *(sig - 1));
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}
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}
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endargs:
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nres = strlen(sig); /* number of expected results */
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if (lua_pcall(L, narg, nres, 0) != 0) /* do the call */
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script_error(L, "error calling '%s': %s", func, lua_tostring(L, -1));
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nres = -nres; /* stack index of first result */
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while (*sig) { /* repeat for each result */
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switch (*sig++) {
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case 'd': /* double result */
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if (!lua_isnumber(L, nres))
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script_error(L, "wrong result type");
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*va_arg(vl, double *) = lua_tonumber(L, nres);
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break;
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case 'i': /* int result */
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if (!lua_isnumber(L, nres))
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script_error(L, "wrong result type");
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*va_arg(vl, int *) = lua_tointeger(L, nres);
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break;
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case 's': /* string result */
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if (!lua_isstring(L, nres))
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script_error(L, "wrong result type");
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*va_arg(vl, const char **) = lua_tostring(L, nres);
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break;
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default:
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script_error(L, "invalid option (%c)", *(sig - 1));
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}
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nres++;
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}
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va_end(vl);
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}
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bool script_load(lua_State *L, const char *path)
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{
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infostream<<"Loading and running script from "<<path<<std::endl;
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int ret = luaL_loadfile(L, path) || lua_pcall(L, 0, 0, 0);
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if(ret){
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errorstream<<"Failed to load and run script from "<<path<<": "<<lua_tostring(L, -1)<<std::endl;
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lua_pop(L, 1); // Pop error message from stack
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return false;
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}
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return true;
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}
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lua_State* script_init()
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{
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lua_State *L = luaL_newstate();
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luaL_openlibs(L);
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return L;
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}
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lua_State* script_deinit(lua_State *L)
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{
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lua_close(L);
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}
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