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
41 int
strcasecmp_l(const char * s1,const char * s2,locale_t locale)42 strcasecmp_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 }
54 int
strcasecmp(const char * s1,const char * s2)55 strcasecmp(const char *s1, const char *s2)
56 {
57 return strcasecmp_l(s1, s2, __get_locale());
58 }
59
60 int
strncasecmp_l(const char * s1,const char * s2,size_t n,locale_t locale)61 strncasecmp_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
79 int
strncasecmp(const char * s1,const char * s2,size_t n)80 strncasecmp(const char *s1, const char *s2, size_t n)
81 {
82 return strncasecmp_l(s1, s2, n, __get_locale());
83 }
84