1 /* $OpenBSD: strchr.c,v 1.3 2004/05/06 01:12:05 deraadt Exp $ */
2
3 /*
4 * Copyright (c) 2004 Daniel Hartmeier
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * - Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
28 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 *
31 */
32
33 #if defined(LIBC_SCCS) && !defined(lint)
34 static char *rcsid = "$OpenBSD: strchr.c,v 1.3 2004/05/06 01:12:05 deraadt Exp $";
35 #endif /* LIBC_SCCS and not lint */
36
37 #include <sys/types.h>
38 #if !defined(_KERNEL) && !defined(_STANDALONE)
39 #include <string.h>
40 #else
41 #include <lib/libkern/libkern.h>
42 #define NULL ((char *)0)
43 #endif
44
45 char *
46 strchr(const char *s, int c)
47 {
48 while (*s) {
49 if (*s == c)
50 return ((char *)s);
51 s++;
52 }
53 return (NULL);
54 }
55
56 char *
57 strrchr(const char *s, int c)
58 {
59 char *t = NULL;
60
61 while (*s) {
62 if (*s == c)
63 t = (char *)s;
64 s++;
65 }
66 return (t);
67 }