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char *rcs_auxlib="$Id: $";
#include <stdio.h>
#include "lua.h"
void luaL_arg_check(int cond, char *funcname, int numarg, char *extramsg)
{
if (!cond) {
char buff[100];
if (extramsg == NULL)
sprintf(buff, "bad argument #%d to function `%s'", numarg, funcname);
else
sprintf(buff, "bad argument #%d to function `%s' (%s)",
numarg, funcname, extramsg);
lua_error(buff);
}
}
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);
}
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