69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/*
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* Copyright (c) 1994 Christian E. Hopps
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christian E. Hopps.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *rcsid = "$NetBSD: strncasecmp.c,v 1.6 2005/02/26 22:58:56 perry Exp $";
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#endif /* LIBC_SCCS and not lint */
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#if defined(_KERNEL) || defined(_STANDALONE)
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#include <lib/libkern/libkern.h>
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#else
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#include <string.h>
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#endif
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int
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strncasecmp(s1, s2, n)
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const char *s1;
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const char *s2;
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size_t n;
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{
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if (n == 0)
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return 0;
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do {
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unsigned char c1 = (unsigned char) *s1++;
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unsigned char c2 = (unsigned char) *s2++;
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if (c1 != c2) {
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if (c1 >= 'A' && c1 <= 'Z' &&
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c2 >= 'a' && c2 <= 'z')
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c1 += 'a' - 'A';
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else if (c1 >= 'a' && c1 <= 'z' &&
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c2 >= 'A' && c2 <= 'Z')
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c2 += 'a' - 'A';
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if (c1 != c2)
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return c1 - c2;
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}
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if (c1 == 0)
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break;
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} while (--n != 0);
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return 0;
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}
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