1*716024cdSPeter Avalos /* 2*716024cdSPeter Avalos * Copyright (c) 2007 Todd C. Miller <Todd.Miller@courtesan.com> 3*716024cdSPeter Avalos * 4*716024cdSPeter Avalos * Permission to use, copy, modify, and distribute this software for any 5*716024cdSPeter Avalos * purpose with or without fee is hereby granted, provided that the above 6*716024cdSPeter Avalos * copyright notice and this permission notice appear in all copies. 7*716024cdSPeter Avalos * 8*716024cdSPeter Avalos * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9*716024cdSPeter Avalos * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10*716024cdSPeter Avalos * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11*716024cdSPeter Avalos * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12*716024cdSPeter Avalos * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13*716024cdSPeter Avalos * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14*716024cdSPeter Avalos * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15*716024cdSPeter Avalos * 16*716024cdSPeter Avalos * $OpenBSD: memrchr.c,v 1.2 2007/11/27 16:22:12 martynas Exp $ 17*716024cdSPeter Avalos * $FreeBSD: src/lib/libc/string/memrchr.c,v 1.1 2008/04/10 00:12:44 delphij Exp $ 18*716024cdSPeter Avalos */ 19*716024cdSPeter Avalos 20*716024cdSPeter Avalos #include <string.h> 21*716024cdSPeter Avalos 22*716024cdSPeter Avalos /* 23*716024cdSPeter Avalos * Reverse memchr() 24*716024cdSPeter Avalos * Find the last occurrence of 'c' in the buffer 's' of size 'n'. 25*716024cdSPeter Avalos */ 26*716024cdSPeter Avalos void * 27*716024cdSPeter Avalos memrchr(const void *s, int c, size_t n) 28*716024cdSPeter Avalos { 29*716024cdSPeter Avalos const unsigned char *cp; 30*716024cdSPeter Avalos 31*716024cdSPeter Avalos if (n != 0) { 32*716024cdSPeter Avalos cp = (unsigned char *)s + n; 33*716024cdSPeter Avalos do { 34*716024cdSPeter Avalos if (*(--cp) == (unsigned char)c) 35*716024cdSPeter Avalos return((void *)cp); 36*716024cdSPeter Avalos } while (--n != 0); 37*716024cdSPeter Avalos } 38*716024cdSPeter Avalos return(NULL); 39*716024cdSPeter Avalos } 40