1/*
2 * Copyright (c) 1987, 1993
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.
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
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)strcasecmp.c	8.1 (Berkeley) 6/4/93";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: src/lib/libc/string/strcasecmp.c,v 1.8 2009/02/03 17:58:20 danger Exp $");
35
36#include "xlocale_private.h"
37
38#include <strings.h>
39#include <ctype.h>
40
41typedef unsigned char u_char;
42
43int
44strcasecmp_l(s1, s2, loc)
45	const char *s1, *s2;
46	locale_t loc;
47{
48	const u_char
49			*us1 = (const u_char *)s1,
50			*us2 = (const u_char *)s2;
51
52	NORMALIZE_LOCALE(loc);
53	while (tolower_l(*us1, loc) == tolower_l(*us2++, loc))
54		if (*us1++ == '\0')
55			return (0);
56	return (tolower_l(*us1, loc) - tolower_l(*--us2, loc));
57}
58
59int
60strcasecmp(const char *s1, const char *s2)
61{
62	return strcasecmp_l(s1, s2, __current_locale());
63}
64
65int
66strncasecmp_l(s1, s2, n, loc)
67	const char *s1, *s2;
68	size_t n;
69	locale_t loc;
70{
71	NORMALIZE_LOCALE(loc);
72	if (n != 0) {
73		const u_char
74				*us1 = (const u_char *)s1,
75				*us2 = (const u_char *)s2;
76
77		do {
78			if (tolower_l(*us1, loc) != tolower_l(*us2++, loc))
79				return (tolower_l(*us1, loc) - tolower_l(*--us2, loc));
80			if (*us1++ == '\0')
81				break;
82		} while (--n != 0);
83	}
84	return (0);
85}
86
87int
88strncasecmp(const char *s1, const char *s2, size_t n)
89{
90	return strncasecmp_l(s1, s2, n, __current_locale());
91}
92