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/* $Id: memchr.cpp $ */
/** @file
* IPRT - CRT Strings, memcpy().
*/
/*
* Copyright (C) 2006-2020 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 a memory block for a character.
*
* @returns Pointer to the first instance of ch in pv.
* @returns NULL if ch wasn't found.
* @param pv Pointer to the block to search.
* @param ch The character to search for.
* @param cb The size of the block.
*/
#ifdef _MSC_VER /* Silly 'safeness' from MS. */
# if _MSC_VER >= 1400
_CRTIMP __checkReturn _CONST_RETURN void * __cdecl memchr( __in_bcount_opt(_MaxCount) const void * pv, __in int ch, __in size_t cb)
# else
void *memchr(const void *pv, int ch, size_t cb)
# endif
#else
void *memchr(const void *pv, int ch, size_t cb)
#endif
{
register uint8_t const *pu8 = (uint8_t const *)pv;
register size_t cb2 = cb;
while (cb2-- > 0)
{
if (*pu8 == ch)
return (void *)pu8;
pu8++;
}
return NULL;
}
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