1 /** @file
2 strncasecmp implementation
3
4 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 * Copyright (c) 1987, 1993
14 * The Regents of the University of California. All rights reserved.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39
40 $NetBSD: strncasecmp.c,v 1.2 2007/06/04 18:19:27 christos Exp $
41 strcasecmp.c 8.1 (Berkeley) 6/4/93
42 **/
43 #include <LibConfig.h>
44 #include <sys/cdefs.h>
45
46 #if !defined(_KERNEL) && !defined(_STANDALONE)
47 #include "namespace.h"
48 #include <assert.h>
49 #include <ctype.h>
50 #include <string.h>
51 #ifdef __weak_alias
__weak_alias(strcasecmp,_strcasecmp)52 __weak_alias(strcasecmp,_strcasecmp)
53 __weak_alias(strncasecmp,_strncasecmp)
54 #endif
55 #else
56 #include <lib/libkern/libkern.h>
57 #include <machine/limits.h>
58 #endif
59
60 int
61 strncasecmp(const char *s1, const char *s2, size_t n)
62 {
63 int CompareVal;
64
65 _DIAGASSERT(s1 != NULL);
66 _DIAGASSERT(s2 != NULL);
67
68 if (n != 0) {
69 do {
70 CompareVal = tolower(*s1) - tolower(*s2);
71 if (CompareVal != 0) {
72 return (CompareVal);
73 }
74 ++s1;
75 ++s2;
76 if (*s1 == '\0') {
77 break;
78 }
79 } while (--n != 0);
80 }
81 return (0);
82 }
83