[apple/libc.git] / string / FreeBSD / strcasestr.c

/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/string/strcasestr.c,v 1.5 2009/02/03 17:58:20 danger Exp $");

#include "xlocale_private.h"

#include <ctype.h>
#include <string.h>

/*
 * Find the first occurrence of find in s, ignore case.
 */
char *
strcasestr_l(s, find, loc)
	const char *s, *find;
	locale_t loc;
{
	char c, sc;
	size_t len;

	NORMALIZE_LOCALE(loc);
	if ((c = *find++) != 0) {
		c = tolower_l((unsigned char)c, loc);
		len = strlen(find);
		do {
			do {
				if ((sc = *s++) == 0)
					return (NULL);
			} while ((char)tolower_l((unsigned char)sc, loc) != c);
		} while (strncasecmp_l(s, find, len, loc) != 0);
		s--;
	}
	return ((char *)s);
}

char *
strcasestr(const char *s, const char *find)
{
	return strcasestr_l(s, find, __current_locale());
}
Commit	Line	Data
5b2abdfb	1	/*-
e9ce8d39 A	2	* Copyright (c) 1990, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Chris Torek.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
e9ce8d39 A	16	* 4. Neither the name of the University nor the names of its contributors
	17	* may be used to endorse or promote products derived from this software
	18	* without specific prior written permission.
	19	*
	20	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	* SUCH DAMAGE.
	31	*/
	32
9385eb3d	33	#include <sys/cdefs.h>
1f2f436a	34	__FBSDID("$FreeBSD: src/lib/libc/string/strcasestr.c,v 1.5 2009/02/03 17:58:20 danger Exp $");
9385eb3d	35
ad3c9f2a A	36	#include "xlocale_private.h"
ad3c9f2a A	37
9385eb3d A	38	#include <ctype.h>
	39	#include <string.h>
	40
e9ce8d39	41	/*
9385eb3d	42	* Find the first occurrence of find in s, ignore case.
e9ce8d39	43	*/
9385eb3d	44	char *
ad3c9f2a A	45	strcasestr_l(s, find, loc)
	46	const char s, find;
	47	locale_t loc;
9385eb3d A	48	{
	49	char c, sc;
	50	size_t len;
e9ce8d39	51
ad3c9f2a	52	NORMALIZE_LOCALE(loc);
9385eb3d	53	if ((c = *find++) != 0) {
ad3c9f2a	54	c = tolower_l((unsigned char)c, loc);
9385eb3d A	55	len = strlen(find);
	56	do {
	57	do {
	58	if ((sc = *s++) == 0)
	59	return (NULL);
ad3c9f2a A	60	} while ((char)tolower_l((unsigned char)sc, loc) != c);
ad3c9f2a A	61	} while (strncasecmp_l(s, find, len, loc) != 0);
9385eb3d A	62	s--;
	63	}
	64	return ((char *)s);
	65	}
ad3c9f2a A	66
	67	char *
	68	strcasestr(const char s, const char find)
	69	{
	70	return strcasestr_l(s, find, __current_locale());
	71	}