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comparison mupdf-source/thirdparty/curl/lib/curl_memrchr.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2018, 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.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 */