1/*
2 * Copyright (c) 2007-2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. Please obtain a copy of the License at
10 * http://www.opensource.apple.com/apsl/ and read it before using this
11 * file.
12 *
13 * The Original Code and all software distributed under the License are
14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18 * Please see the License for the specific language governing rights and
19 * limitations under the License.
20 *
21 * @APPLE_LICENSE_HEADER_END@
22 */
23
24#include <stdlib.h>
25#include <stdio.h>
26#include <stdarg.h>
27#include <limits.h>
28#include "secure.h"
29
30int
31__vsprintf_chk (char *dest, int flags, size_t dstlen, const char *format,
32		va_list arg)
33{
34  int done;
35
36  if (__builtin_expect (dstlen > (size_t) INT_MAX, 0))
37    done = vsprintf (dest, format, arg);
38  else
39    {
40      done = vsnprintf (dest, dstlen, format, arg);
41      if (__builtin_expect (done >= 0 && (size_t) done >= dstlen, 0))
42        __chk_fail_overflow ();
43    }
44
45  return done;
46}
47