1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 * SPDX-License-Identifier: curl 22 * 23 ***************************************************************************/ 24 25#include "curl_setup.h" 26 27#include <curl/curl.h> 28 29#include "curl_memrchr.h" 30#include "curl_memory.h" 31 32/* The last #include file should be: */ 33#include "memdebug.h" 34 35#ifndef HAVE_MEMRCHR 36 37/* 38 * Curl_memrchr() 39 * 40 * Our memrchr() function clone for systems which lack this function. The 41 * memrchr() function is like the memchr() function, except that it searches 42 * backwards from the end of the n bytes pointed to by s instead of forward 43 * from the beginning. 44 */ 45 46void * 47Curl_memrchr(const void *s, int c, size_t n) 48{ 49 if(n > 0) { 50 const unsigned char *p = s; 51 const unsigned char *q = s; 52 53 p += n - 1; 54 55 while(p >= q) { 56 if(*p == (unsigned char)c) 57 return (void *)p; 58 p--; 59 } 60 } 61 return NULL; 62} 63 64#endif /* HAVE_MEMRCHR */ 65