1#include "config.h"
2
3#if HAVE_STRCASESTR
4
5int dummy;
6
7#else
8
9/*	$Id: compat_strcasestr.c,v 1.4 2014/12/11 09:19:32 schwarze Exp $	*/
10/*	$NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp $	*/
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 */
53char *
54strcasestr(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
74