| /* $OpenBSD: memrchr.c,v 1.3 2015/08/31 02:53:57 guenther Exp $ */ |
| |
| /* |
| * Copyright (c) 2007 Todd C. Miller <Todd.Miller@courtesan.com> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include <string.h> |
| |
| /* |
| * Reverse memchr() |
| * Find the last occurrence of 'c' in the buffer 's' of size 'n'. |
| */ |
| void * |
| memrchr(const void *s, int c, size_t n) |
| { |
| const unsigned char *cp; |
| |
| if (n != 0) { |
| cp = (unsigned char *)s + n; |
| do { |
| if (*(--cp) == (unsigned char)c) |
| return((void *)cp); |
| } while (--n != 0); |
| } |
| return(NULL); |
| } |
| DEF_WEAK(memrchr); |