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/* $OpenBSD: memrchr.c,v 1.3 2015/08/31 02:53:57 guenther 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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#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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DEF_WEAK(memrchr); |