1/*
2 * Copyright (c) 2012-2013 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 <string.h>
26#include "secure.h"
27
28void *
29__memccpy_chk (void *dest, const void *src, int c, size_t len, size_t dstlen)
30{
31  void *retval;
32
33  if (__builtin_expect (dstlen < len, 0))
34    __chk_fail_overflow ();
35
36  /* retval is NULL if len was copied, otherwise retval is the
37   * byte *after* the last one written.
38   */
39  retval = memccpy (dest, src, c, len);
40
41  if (retval != NULL) {
42    len = (uintptr_t)retval - (uintptr_t)dest;
43  }
44
45  __chk_overlap(dest, len, src, len);
46
47  return retval;
48}
49