1143880Spjd/*-
2143880Spjd * Copyright (c) 1990, 1993
3143880Spjd *	The Regents of the University of California.  All rights reserved.
4143880Spjd *
5143880Spjd * This code is derived from software contributed to Berkeley by
6143880Spjd * Chris Torek.
7143880Spjd *
8143880Spjd * Copyright (c) 2011 The FreeBSD Foundation
9143880Spjd * All rights reserved.
10263351Sjmmv * Portions of this software were developed by David Chisnall
11143880Spjd * under sponsorship from the FreeBSD Foundation.
12143880Spjd *
13143880Spjd * Redistribution and use in source and binary forms, with or without
14143880Spjd * modification, are permitted provided that the following conditions
15143880Spjd * are met:
16143880Spjd * 1. Redistributions of source code must retain the above copyright
17143880Spjd *    notice, this list of conditions and the following disclaimer.
18143880Spjd * 2. Redistributions in binary form must reproduce the above copyright
19143880Spjd *    notice, this list of conditions and the following disclaimer in the
20143880Spjd *    documentation and/or other materials provided with the distribution.
21143880Spjd * 3. Neither the name of the University nor the names of its contributors
22143880Spjd *    may be used to endorse or promote products derived from this software
23143880Spjd *    without specific prior written permission.
24143880Spjd *
25143880Spjd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26143880Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27143880Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28263351Sjmmv * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29143880Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30143880Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31143880Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32143880Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33143880Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34143880Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35143880Spjd * SUCH DAMAGE.
36143880Spjd */
37143880Spjd
38143880Spjd#include <sys/cdefs.h>
39143880Spjd__FBSDID("$FreeBSD: releng/10.3/lib/libc/string/strcasestr.c 251069 2013-05-28 20:57:40Z emaste $");
40143880Spjd
41143880Spjd#include <ctype.h>
42143880Spjd#include <string.h>
43#include "xlocale_private.h"
44
45/*
46 * Find the first occurrence of find in s, ignore case.
47 */
48char *
49strcasestr_l(const char *s, const char *find, locale_t locale)
50{
51	char c, sc;
52	size_t len;
53	FIX_LOCALE(locale);
54
55	if ((c = *find++) != 0) {
56		c = tolower_l((unsigned char)c, locale);
57		len = strlen(find);
58		do {
59			do {
60				if ((sc = *s++) == 0)
61					return (NULL);
62			} while ((char)tolower_l((unsigned char)sc, locale) != c);
63		} while (strncasecmp_l(s, find, len, locale) != 0);
64		s--;
65	}
66	return ((char *)s);
67}
68char *
69strcasestr(const char *s, const char *find)
70{
71	return strcasestr_l(s, find, __get_locale());
72}
73