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