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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
25 * Copyright 2016 Joyent, Inc.
26 */
27
28 /*
29 * Compare strings ignoring case difference.
30 * returns: s1>s2: >0 s1==s2: 0 s1<s2: <0
31 * All letters are converted to the lowercase and compared.
32 */
33
34 #include "lint.h"
35 #include <stdlib.h>
36 #include <wchar.h>
37 #include <locale.h>
38 #include "libc.h"
39
40 /* Legacy Sun interfaces */
41 #pragma weak wscasecmp = wcscasecmp
42 #pragma weak wsncasecmp = wcsncasecmp
43
44 int
wcscasecmp_l(const wchar_t * s1,const wchar_t * s2,locale_t loc)45 wcscasecmp_l(const wchar_t *s1, const wchar_t *s2, locale_t loc)
46 {
47 if (s1 == s2)
48 return (0);
49
50 while (towlower_l(*s1, loc) == towlower_l(*s2, loc)) {
51 if (*s1 == 0)
52 return (0);
53 s1++;
54 s2++;
55 }
56 return (towlower_l(*s1, loc) - towlower_l(*s2, loc));
57 }
58
59 int
wcscasecmp(const wchar_t * s1,const wchar_t * s2)60 wcscasecmp(const wchar_t *s1, const wchar_t *s2)
61 {
62 return (wcscasecmp_l(s1, s2, uselocale(NULL)));
63 }
64
65 int
wcsncasecmp_l(const wchar_t * s1,const wchar_t * s2,size_t n,locale_t loc)66 wcsncasecmp_l(const wchar_t *s1, const wchar_t *s2, size_t n, locale_t loc)
67 {
68 if (s1 == s2 || n == 0)
69 return (0);
70
71 while ((towlower_l(*s1, loc) == towlower_l(*s2, loc)) && --n) {
72 if (*s1 == 0)
73 return (0);
74 s1++;
75 s2++;
76 }
77 return (towlower_l(*s1, loc) - towlower_l(*s2, loc));
78 }
79
80 int
wcsncasecmp(const wchar_t * s1,const wchar_t * s2,size_t n)81 wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
82 {
83 return (wcsncasecmp_l(s1, s2, n, uselocale(NULL)));
84 }
85