41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
/* $OpenBSD: memrchr.c,v 1.2 2007/11/27 16:22:12 martynas Exp $ */
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/*
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* Copyright (c) 2007 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* $FreeBSD$
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*/
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#include <string.h>
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/*
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* Reverse memchr()
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* Find the last occurrence of 'c' in the buffer 's' of size 'n'.
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*/
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void *
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memrchr(const void *s, int c, size_t n)
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{
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const unsigned char *cp;
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if (n != 0) {
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cp = (unsigned char *)s + n;
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do {
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if (*(--cp) == (unsigned char)c)
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return((void *)cp);
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} while (--n != 0);
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}
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return(NULL);
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}
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