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/* $Id: memrchr.cpp $ */
/** @file
* IPRT - CRT Strings, memrchr().
*/
/*
* Copyright (C) 2018-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/string.h>
/**
* Search for a given byte starting at the end of the block.
*
* @returns Pointer on a match or NULL otherwise.
* @param pb Pointer to the block.
* @param ch The char to search for.
* @param cb The size of the block.
*/
void *memrchr(const char *pb, int ch, size_t cb)
{
if (cb)
{
const char *pbCur = pb + cb - 1;
while (cb)
{
if (*pbCur == ch)
return (void *)pbCur;
pbCur--;
cb--;
}
}
return NULL;
}
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