1/* 2 * Copyright (c) 2007 Todd C. Miller <Todd.Miller@courtesan.com> 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17#include <config.h> 18 19#include <sys/types.h> 20 21#include "missing.h" 22 23/* 24 * Reverse memchr() 25 * Find the last occurrence of 'c' in the buffer 's' of size 'n'. 26 */ 27void * 28memrchr(s, c, n) 29 const void *s; 30 int c; 31 size_t n; 32{ 33 const unsigned char *cp; 34 35 if (n != 0) { 36 cp = (unsigned char *)s + n; 37 do { 38 if (*(--cp) == (unsigned char)c) 39 return (void *)cp; 40 } while (--n != 0); 41 } 42 return (void *)0; 43} 44