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char *rcs_auxlib="$Id: auxlib.c,v 1.1 1997/03/17 17:02:29 roberto Exp roberto $";
#include <stdio.h>
#include <stdarg.h>
#include "lua.h"
#include "auxlib.h"
void luaL_arg_check(int cond, char *funcname, int numarg, char *extramsg)
{
if (!cond) {
if (extramsg == NULL)
luaL_verror("bad argument #%d to function `%s'", numarg, funcname);
else
luaL_verror("bad argument #%d to function `%s' (%s)",
numarg, funcname, extramsg);
}
}
char *luaL_check_string (int numArg, char *funcname)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(lua_isstring(o), funcname, numArg, "string expected");
return lua_getstring(o);
}
char *luaL_opt_string (int numArg, char *def, char *funcname)
{
return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
luaL_check_string(numArg, funcname);
}
double luaL_check_number (int numArg, char *funcname)
{
lua_Object o = lua_getparam(numArg);
luaL_arg_check(lua_isnumber(o), funcname, numArg, "number expected");
return lua_getnumber(o);
}
double luaL_opt_number (int numArg, double def, char *funcname)
{
return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
luaL_check_number(numArg, funcname);
}
void luaL_openlib (struct luaL_reg *l, int n)
{
int i;
for (i=0; i<n; i++)
lua_register(l[i].name, l[i].func);
}
void luaL_verror (char *fmt, ...)
{
char buff[1000];
va_list argp;
va_start(argp, fmt);
vsprintf(buff, fmt, argp);
va_end(argp);
lua_error(buff);
}
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