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