1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2015, 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 http://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 #include "curl_memrchr.h" 25 #include "curl_memory.h" 26 27 /* The last #include file should be: */ 28 #include "memdebug.h" 29 30 #ifndef HAVE_MEMRCHR 31 32 /* 33 * Curl_memrchr() 34 * 35 * Our memrchr() function clone for systems which lack this function. The 36 * memrchr() function is like the memchr() function, except that it searches 37 * backwards from the end of the n bytes pointed to by s instead of forward 38 * from the beginning. 39 */ 40 41 void * 42 Curl_memrchr(const void *s, int c, size_t n) 43 { 44 const unsigned char *p = s; 45 const unsigned char *q = s; 46 47 p += n - 1; 48 49 while(p >= q) { 50 if(*p == (unsigned char)c) 51 return (void *)p; 52 p--; 53 } 54 55 return NULL; 56 } 57 58 #endif /* HAVE_MEMRCHR */ 59
