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 * All rights reserved.
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 #if defined(LIBC_SCCS) && !defined(lint)
38 static char sccsid[] = "@(#)strcasecmp.c 8.1 (Berkeley) 6/4/93";
39 #endif /* LIBC_SCCS and not lint */
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
42
43 #include <strings.h>
44 #include <ctype.h>
45 #include "xlocale_private.h"
46
47 int
strcasecmp_l(const char * s1,const char * s2,locale_t locale)48 strcasecmp_l(const char *s1, const char *s2, locale_t locale)
49 {
50 const u_char
51 *us1 = (const u_char *)s1,
52 *us2 = (const u_char *)s2;
53 FIX_LOCALE(locale);
54
55 while (tolower_l(*us1, locale) == tolower_l(*us2++, locale))
56 if (*us1++ == '\0')
57 return (0);
58 return (tolower_l(*us1, locale) - tolower_l(*--us2, locale));
59 }
60 int
strcasecmp(const char * s1,const char * s2)61 strcasecmp(const char *s1, const char *s2)
62 {
63 return strcasecmp_l(s1, s2, __get_locale());
64 }
65
66 int
strncasecmp_l(const char * s1,const char * s2,size_t n,locale_t locale)67 strncasecmp_l(const char *s1, const char *s2, size_t n, locale_t locale)
68 {
69 FIX_LOCALE(locale);
70 if (n != 0) {
71 const u_char
72 *us1 = (const u_char *)s1,
73 *us2 = (const u_char *)s2;
74
75 do {
76 if (tolower_l(*us1, locale) != tolower_l(*us2++, locale))
77 return (tolower_l(*us1, locale) - tolower_l(*--us2, locale));
78 if (*us1++ == '\0')
79 break;
80 } while (--n != 0);
81 }
82 return (0);
83 }
84
85 int
strncasecmp(const char * s1,const char * s2,size_t n)86 strncasecmp(const char *s1, const char *s2, size_t n)
87 {
88 return strncasecmp_l(s1, s2, n, __get_locale());
89 }
90