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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#include <curl/curl.h>
#include "curl_memrchr.h"
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
#ifndef HAVE_MEMRCHR
/*
* Curl_memrchr()
*
* Our memrchr() function clone for systems which lack this function. The
* memrchr() function is like the memchr() function, except that it searches
* backwards from the end of the n bytes pointed to by s instead of forward
* from the beginning.
*/
void *
Curl_memrchr(const void *s, int c, size_t n)
{
if(n > 0) {
const unsigned char *p = s;
const unsigned char *q = s;
p += n - 1;
while(p >= q) {
if(*p == (unsigned char)c)
return (void *)p;
p--;
}
}
return NULL;
}
#endif /* HAVE_MEMRCHR */
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