1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
24  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
25  */
26 
27 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 /*
31  * Portions of this source code were derived from Berkeley 4.3 BSD
32  * under license from the Regents of the University of California.
33  */
34 
35 #include "lint.h"
36 #include <sys/types.h>
37 #include <strings.h>
38 #include <ctype.h>
39 #include <locale.h>
40 #include "localeimpl.h"
41 #include "lctype.h"
42 
43 int
44 strcasecmp_l(const char *s1, const char *s2, locale_t loc)
45 {
46 	extern int ascii_strcasecmp(const char *s1, const char *s2);
47 	const int *cm;
48 	const uchar_t *us1;
49 	const uchar_t *us2;
50 	const struct lc_ctype *lct = loc->ctype;
51 
52 	/*
53 	 * If we are in a locale that uses the ASCII character set
54 	 * (C or POSIX), use the fast ascii_strcasecmp() function.
55 	 */
56 	if (lct->lc_is_ascii)
57 		return (ascii_strcasecmp(s1, s2));
58 
59 	cm = lct->lc_trans_lower;
60 	us1 = (const uchar_t *)s1;
61 	us2 = (const uchar_t *)s2;
62 
63 	while (cm[*us1] == cm[*us2++])
64 		if (*us1++ == '\0')
65 			return (0);
66 	return (cm[*us1] - cm[*(us2 - 1)]);
67 }
68 
69 int
70 strcasecmp(const char *s1, const char *s2)
71 {
72 	/* would be nice to avoid uselocale()... but I don't see how */
73 	return (strcasecmp_l(s1, s2, uselocale(NULL)));
74 }
75