compat_strcasestr.c revision 274876 
1#ifdef HAVE_CONFIG_H
2#include "config.h"
3#endif
4
5#ifdef HAVE_STRCASESTR
6
7int 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 */
54char *
55strcasestr(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