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

/*
 * Copyright (c) 1987, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strcasecmp.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/string/strcasecmp.c,v 1.8 2009/02/03 17:58:20 danger Exp $");

#include "xlocale_private.h"

#include <strings.h>
#include <ctype.h>

typedef unsigned char u_char;

int
strcasecmp_l(s1, s2, loc)
	const char *s1, *s2;
	locale_t loc;
{
	const u_char
			*us1 = (const u_char *)s1,
			*us2 = (const u_char *)s2;

	NORMALIZE_LOCALE(loc);
	while (tolower_l(*us1, loc) == tolower_l(*us2++, loc))
		if (*us1++ == '\0')
			return (0);
	return (tolower_l(*us1, loc) - tolower_l(*--us2, loc));
}

int
strcasecmp(const char *s1, const char *s2)
{
	return strcasecmp_l(s1, s2, __current_locale());
}

int
strncasecmp_l(s1, s2, n, loc)
	const char *s1, *s2;
	size_t n;
	locale_t loc;
{
	NORMALIZE_LOCALE(loc);
	if (n != 0) {
		const u_char
				*us1 = (const u_char *)s1,
				*us2 = (const u_char *)s2;

		do {
			if (tolower_l(*us1, loc) != tolower_l(*us2++, loc))
				return (tolower_l(*us1, loc) - tolower_l(*--us2, loc));
			if (*us1++ == '\0')
				break;
		} while (--n != 0);
	}
	return (0);
}

int
strncasecmp(const char *s1, const char *s2, size_t n)
{
	return strncasecmp_l(s1, s2, n, __current_locale());
}
Commit	Line	Data
e9ce8d39	1	/*
9385eb3d	2	* Copyright (c) 1987, 1993
e9ce8d39 A	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
e9ce8d39 A	13	* 4. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29
5b2abdfb	30	#if defined(LIBC_SCCS) && !defined(lint)
9385eb3d	31	static char sccsid[] = "@(#)strcasecmp.c 8.1 (Berkeley) 6/4/93";
5b2abdfb	32	#endif /* LIBC_SCCS and not lint */
9385eb3d	33	#include <sys/cdefs.h>
1f2f436a	34	__FBSDID("$FreeBSD: src/lib/libc/string/strcasecmp.c,v 1.8 2009/02/03 17:58:20 danger Exp $");
e9ce8d39	35
ad3c9f2a A	36	#include "xlocale_private.h"
ad3c9f2a A	37
9385eb3d A	38	#include <strings.h>
	39	#include <ctype.h>
	40
	41	typedef unsigned char u_char;
	42
	43	int
ad3c9f2a A	44	strcasecmp_l(s1, s2, loc)
	45	const char s1, s2;
	46	locale_t loc;
9385eb3d A	47	{
	48	const u_char
	49	us1 = (const u_char )s1,
	50	us2 = (const u_char )s2;
	51
ad3c9f2a A	52	NORMALIZE_LOCALE(loc);
ad3c9f2a A	53	while (tolower_l(us1, loc) == tolower_l(us2++, loc))
9385eb3d A	54	if (*us1++ == '\0')
9385eb3d A	55	return (0);
ad3c9f2a	56	return (tolower_l(us1, loc) - tolower_l(--us2, loc));
9385eb3d	57	}
e9ce8d39	58
5b2abdfb	59	int
ad3c9f2a	60	strcasecmp(const char s1, const char s2)
e9ce8d39	61	{
ad3c9f2a A	62	return strcasecmp_l(s1, s2, __current_locale());
	63	}
	64
	65	int
	66	strncasecmp_l(s1, s2, n, loc)
	67	const char s1, s2;
	68	size_t n;
	69	locale_t loc;
	70	{
	71	NORMALIZE_LOCALE(loc);
9385eb3d A	72	if (n != 0) {
	73	const u_char
	74	us1 = (const u_char )s1,
	75	us2 = (const u_char )s2;
5b2abdfb	76
9385eb3d	77	do {
ad3c9f2a A	78	if (tolower_l(us1, loc) != tolower_l(us2++, loc))
ad3c9f2a A	79	return (tolower_l(us1, loc) - tolower_l(--us2, loc));
9385eb3d A	80	if (*us1++ == '\0')
	81	break;
	82	} while (--n != 0);
	83	}
	84	return (0);
e9ce8d39	85	}
ad3c9f2a A	86
	87	int
	88	strncasecmp(const char s1, const char s2, size_t n)
	89	{
	90	return strncasecmp_l(s1, s2, n, __current_locale());
	91	}