1 #ifdef HAVE_CONFIG_H
2 #include "config.h"
3 #endif
4
5 #ifdef HAVE_STRCASESTR
6
7 int dummy;
8
9 #else
10
11 /* ($)NetBSD: strcasestr.c,v 1.2 2005/02/09 21:35:47 kleink Exp $ */
12
13 /*-
14 * Copyright (c) 1990, 1993
15 * The Regents of the University of California. All rights reserved.
16 *
17 * This code is derived from software contributed to Berkeley by
18 * Chris Torek.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 * 3. Neither the name of the University nor the names of its contributors
29 * may be used to endorse or promote products derived from this software
30 * without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 */
44
45 #include <sys/types.h>
46 #include <ctype.h>
47 #include <string.h>
48
49 #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
50
51 /*
52 * Find the first occurrence of find in s, ignore case.
53 */
54 char *
strcasestr(const char * s,const char * find)55 strcasestr(const char *s, const char *find)
56 {
57 char c, sc;
58 size_t len;
59
60 if ((c = *find++) != 0) {
61 c = tolower((unsigned char)c);
62 len = strlen(find);
63 do {
64 do {
65 if ((sc = *s++) == 0)
66 return (NULL);
67 } while ((char)tolower((unsigned char)sc) != c);
68 } while (strncasecmp(s, find, len) != 0);
69 s--;
70 }
71 return __UNCONST(s);
72 }
73
74 #endif
75