VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/string/memrchr.cpp@ 81106

Last change on this file since 81106 was 76553, checked in by vboxsync, 6 years ago

scm --update-copyright-year

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.0 KB
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1/* $Id: memrchr.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2/** @file
3 * IPRT - CRT Strings, memrchr().
4 */
5
6/*
7 * Copyright (C) 2018-2019 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include <iprt/string.h>
32
33
34/**
35 * Search for a given byte starting at the end of the block.
36 *
37 * @returns Pointer on a match or NULL otherwise.
38 * @param pb Pointer to the block.
39 * @param ch The char to search for.
40 * @param cb The size of the block.
41 */
42void *memrchr(const char *pb, int ch, size_t cb)
43{
44 if (cb)
45 {
46 const char *pbCur = pb + cb - 1;
47
48 while (cb)
49 {
50 if (*pbCur == ch)
51 return (void *)pbCur;
52 pbCur--;
53 cb--;
54 }
55 }
56
57 return NULL;
58}
59
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