memrchr.cc
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1 /*
2  * Copyright (C) 1996-2017 The Squid Software Foundation and contributors
3  *
4  * Squid software is distributed under GPLv2+ license and includes
5  * contributions from numerous individuals and organizations.
6  * Please see the COPYING and CONTRIBUTORS files for details.
7  */
8 
9 /*
10  * Copyright (c) 2007 Todd C. Miller <Todd.Miller@courtesan.com>
11  *
12  * Permission to use, copy, modify, and distribute this software for any
13  * purpose with or without fee is hereby granted, provided that the above
14  * copyright notice and this permission notice appear in all copies.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
17  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
18  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
19  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
20  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
21  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
22  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23  */
24 
25 #include "squid.h"
26 
27 #if !HAVE_MEMRCHR
28 
29 #include "compat/memrchr.h"
30 
31 /*
32  * Reverse memchr()
33  * Find the last occurrence of 'c' in the buffer 's' of size 'n'.
34  */
35 void *
36 memrchr(const void *s, int c, size_t n)
37 {
38  const unsigned char *cp;
39 
40  if (n != 0) {
41  cp = (unsigned char *)s + n;
42  do {
43  if (*(--cp) == (unsigned char)c)
44  return((void *)cp);
45  } while (--n != 0);
46  }
47  return((void *)0);
48 }
49 
50 #endif
51 
void * memrchr(const void *s, int c, size_t n)
Definition: memrchr.cc:36

 

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