mirror of https://github.com/lua/lua
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
|
|
** $Id: lauxlib.c,v 1.12 1998/06/19 16:14:09 roberto Exp roberto $
|
|
** 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) {
|
|
lua_Function f = lua_stackedfunction(0);
|
|
char *funcname;
|
|
lua_getobjname(f, &funcname);
|
|
numarg -= lua_nups(f);
|
|
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);
|
|
}
|
|
|