[337] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #include <curl/curl.h>
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| 26 |
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| 27 | #include "curl_memrchr.h"
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| 28 | #include "curl_memory.h"
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| 29 |
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| 30 | /* The last #include file should be: */
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| 31 | #include "memdebug.h"
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| 32 |
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| 33 | #ifndef HAVE_MEMRCHR
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| 34 |
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| 35 | /*
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| 36 | * Curl_memrchr()
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| 37 | *
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| 38 | * Our memrchr() function clone for systems which lack this function. The
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| 39 | * memrchr() function is like the memchr() function, except that it searches
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| 40 | * backwards from the end of the n bytes pointed to by s instead of forward
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| 41 | * from the beginning.
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| 42 | */
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| 43 |
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| 44 | void *
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| 45 | Curl_memrchr(const void *s, int c, size_t n)
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| 46 | {
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| 47 | const unsigned char *p = s;
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| 48 | const unsigned char *q = s;
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| 49 |
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| 50 | p += n - 1;
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| 51 |
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| 52 | while(p >= q) {
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| 53 | if(*p == (unsigned char)c)
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| 54 | return (void *)p;
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| 55 | p--;
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| 56 | }
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| 57 |
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| 58 | return NULL;
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| 59 | }
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| 60 |
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| 61 | #endif /* HAVE_MEMRCHR */
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