Annotation of mandoc/compat_strcasestr.c, Revision 1.4
1.1 schwarze 1: #include "config.h"
2:
1.3 schwarze 3: #if HAVE_STRCASESTR
1.1 schwarze 4:
5: int dummy;
6:
7: #else
8:
1.4 ! schwarze 9: /* $Id$ */
! 10: /* $NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp $ */
1.1 schwarze 11:
12: /*-
13: * Copyright (c) 1990, 1993
14: * The Regents of the University of California. All rights reserved.
15: *
16: * This code is derived from software contributed to Berkeley by
17: * Chris Torek.
18: *
19: * Redistribution and use in source and binary forms, with or without
20: * modification, are permitted provided that the following conditions
21: * are met:
22: * 1. Redistributions of source code must retain the above copyright
23: * notice, this list of conditions and the following disclaimer.
24: * 2. Redistributions in binary form must reproduce the above copyright
25: * notice, this list of conditions and the following disclaimer in the
26: * documentation and/or other materials provided with the distribution.
27: * 3. Neither the name of the University nor the names of its contributors
28: * may be used to endorse or promote products derived from this software
29: * without specific prior written permission.
30: *
31: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41: * SUCH DAMAGE.
42: */
43:
44: #include <sys/types.h>
45: #include <ctype.h>
46: #include <string.h>
47:
48: #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
49:
50: /*
51: * Find the first occurrence of find in s, ignore case.
52: */
53: char *
54: strcasestr(const char *s, const char *find)
55: {
56: char c, sc;
57: size_t len;
58:
59: if ((c = *find++) != 0) {
60: c = tolower((unsigned char)c);
61: len = strlen(find);
62: do {
63: do {
64: if ((sc = *s++) == 0)
65: return (NULL);
66: } while ((char)tolower((unsigned char)sc) != c);
67: } while (strncasecmp(s, find, len) != 0);
68: s--;
69: }
70: return __UNCONST(s);
71: }
72:
73: #endif
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