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/*
** $Id: lauxlib.c,v 1.12 1998/06/19 16:14:09 roberto Exp $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
/* Please Notice: This file uses only the official API of Lua
** Any function declared here could be written as an application
** function. With care, these functions can be used by other libraries.
*/
#include "lauxlib.h"
#include "lua.h"
#include "luadebug.h"
int luaL_findstring (char *name, char *list[]) {
int i;
for (i=0; list[i]; i++)
if (strcmp(list[i], name) == 0)
return i;
return -1; /* name not found */
}
void luaL_argerror (int numarg, char *extramsg)
{
char *funcname;
lua_getobjname(lua_stackedfunction(0), &funcname);
if (funcname == NULL)
funcname = "???";
if (extramsg == NULL)
luaL_verror("bad argument #%d to function `%.50s'", numarg, funcname);
else
luaL_verror("bad argument #%d to function `%.50s' (%.100s)",
numarg, funcname, extramsg);
}
char *luaL_check_lstr (int numArg, long *len)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(lua_isstring(o), numArg, "string expected");
if (len) *len = lua_strlen(o);
return lua_getstring(o);
}
char *luaL_opt_lstr (int numArg, char *def, long *len)
{
return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
luaL_check_lstr(numArg, len);
}
double luaL_check_number (int numArg)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(lua_isnumber(o), numArg, "number expected");
return lua_getnumber(o);
}
double luaL_opt_number (int numArg, double def)
{
return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
luaL_check_number(numArg);
}
lua_Object luaL_tablearg (int arg)
{
lua_Object o = lua_getparam(arg);
luaL_arg_check(lua_istable(o), arg, "table expected");
return o;
}
lua_Object luaL_functionarg (int arg)
{
lua_Object o = lua_getparam(arg);
luaL_arg_check(lua_isfunction(o), arg, "function expected");
return o;
}
lua_Object luaL_nonnullarg (int numArg)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(o != LUA_NOOBJECT, numArg, "value expected");
return o;
}
void luaL_openlib (struct luaL_reg *l, int n)
{
int i;
lua_open(); /* make sure lua is already open */
for (i=0; i<n; i++)
lua_register(l[i].name, l[i].func);
}
void luaL_verror (char *fmt, ...)
{
char buff[500];
va_list argp;
va_start(argp, fmt);
vsprintf(buff, fmt, argp);
va_end(argp);
lua_error(buff);
}
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