1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel (at) 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.haxx.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 ***************************************************************************/ 22 23 #include "curl_setup.h" 24 25 #include <curl/curl.h> 26 27 #include "curl_memrchr.h" 28 #include "curl_memory.h" 29 30 /* The last #include file should be: */ 31 #include "memdebug.h" 32 33 #ifndef HAVE_MEMRCHR 34 35 /* 36 * Curl_memrchr() 37 * 38 * Our memrchr() function clone for systems which lack this function. The 39 * memrchr() function is like the memchr() function, except that it searches 40 * backwards from the end of the n bytes pointed to by s instead of forward 41 * from the beginning. 42 */ 43 44 void * 45 Curl_memrchr(const void *s, int c, size_t n) 46 { 47 if(n > 0) { 48 const unsigned char *p = s; 49 const unsigned char *q = s; 50 51 p += n - 1; 52 53 while(p >= q) { 54 if(*p == (unsigned char)c) 55 return (void *)p; 56 p--; 57 } 58 } 59 return NULL; 60 } 61 62 #endif /* HAVE_MEMRCHR */ 63
