1/*
2 * Copyright (c) 1987, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Copyright (c) 2011 The FreeBSD Foundation
6 * All rights reserved.
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#if defined(LIBC_SCCS) && !defined(lint)
36static char sccsid[] = "@(#)strcasecmp.c	8.1 (Berkeley) 6/4/93";
37#endif /* LIBC_SCCS and not lint */
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD$");
40
41#include <strings.h>
42#include <ctype.h>
43#include "xlocale_private.h"
44
45int
46strcasecmp_l(const char *s1, const char *s2, locale_t locale)
47{
48	const u_char
49			*us1 = (const u_char *)s1,
50			*us2 = (const u_char *)s2;
51	FIX_LOCALE(locale);
52
53	while (tolower_l(*us1, locale) == tolower_l(*us2++, locale))
54		if (*us1++ == '\0')
55			return (0);
56	return (tolower_l(*us1, locale) - tolower_l(*--us2, locale));
57}
58int
59strcasecmp(const char *s1, const char *s2)
60{
61	return strcasecmp_l(s1, s2, __get_locale());
62}
63
64int
65strncasecmp_l(const char *s1, const char *s2, size_t n, locale_t locale)
66{
67	FIX_LOCALE(locale);
68	if (n != 0) {
69		const u_char
70				*us1 = (const u_char *)s1,
71				*us2 = (const u_char *)s2;
72
73		do {
74			if (tolower_l(*us1, locale) != tolower_l(*us2++, locale))
75				return (tolower_l(*us1, locale) - tolower_l(*--us2, locale));
76			if (*us1++ == '\0')
77				break;
78		} while (--n != 0);
79	}
80	return (0);
81}
82
83int
84strncasecmp(const char *s1, const char *s2, size_t n)
85{
86	return strncasecmp_l(s1, s2, n, __get_locale());
87}
88