suricata
util-memrchr.c
Go to the documentation of this file.
1 /* Copyright (C) 2007-2013 Open Information Security Foundation
2  *
3  * You can copy, redistribute or modify this Program under the terms of
4  * the GNU General Public License version 2 as published by the Free
5  * Software Foundation.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * version 2 along with this program; if not, write to the Free Software
14  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15  * 02110-1301, USA.
16  */
17 
18 /**
19  * \file
20  *
21  * \author Victor Julien <victor@inliniac.net>
22  *
23  */
24 
25 #include "suricata-common.h"
26 #include "util-unittest.h"
27 #include "util-memrchr.h"
28 
29 #ifndef HAVE_MEMRCHR
30 void *memrchr (const void *s, int c, size_t n)
31 {
32  const char *end = s + n;
33 
34  while (end > (const char *)s) {
35  if (*end == (char)c)
36  return (void *)end;
37  end--;
38  }
39  return NULL;
40 }
41 #endif /* HAVE_MEMRCHR */
42 
43 #ifdef UNITTESTS
44 static int MemrchrTest01 (void)
45 {
46  const char *haystack = "abcabc";
47  char needle = 'b';
48 
49  char *ptr = memrchr(haystack, needle, strlen(haystack));
50  if (ptr == NULL)
51  return 0;
52 
53  if (strlen(ptr) != 2)
54  return 0;
55 
56  if (strcmp(ptr, "bc") != 0)
57  return 0;
58 
59  return 1;
60 }
61 #endif
62 
64 {
65 #ifdef UNITTESTS
66  UtRegisterTest("MemrchrTest01", MemrchrTest01);
67 #endif
68 }
void * memrchr(const void *s, int c, size_t n)
Definition: util-memrchr.c:30
void UtRegisterTest(const char *name, int(*TestFn)(void))
Register unit test.
void MemrchrRegisterTests(void)
Definition: util-memrchr.c:63