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/* $Id: bs3-cmn-MemCpy.c $ */
/** @file
* BS3Kit - Bs3MemCpy
*/
/*
* Copyright (C) 2007-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#include "bs3kit-template-header.h"
#undef Bs3MemCpy
BS3_CMN_DEF(void BS3_FAR *, Bs3MemCpy,(void BS3_FAR *pvDst, const void BS3_FAR *pvSrc, size_t cbToCopy))
{
#if 1
const size_t BS3_FAR *pBigSrc = (const size_t BS3_FAR *)pvSrc;
size_t BS3_FAR *pBigDst = (size_t *)pvDst;
size_t cBig = cbToCopy / sizeof(size_t);
while (cBig-- > 0)
*pBigDst++ = *pBigSrc++;
switch (cbToCopy % sizeof(size_t))
{
#if TMPL_BITS >= 64
case 7: ((uint8_t BS3_FAR *)pBigDst)[6] = ((const uint8_t BS3_FAR *)pBigSrc)[6];
case 6: ((uint8_t BS3_FAR *)pBigDst)[5] = ((const uint8_t BS3_FAR *)pBigSrc)[5];
case 5: ((uint8_t BS3_FAR *)pBigDst)[4] = ((const uint8_t BS3_FAR *)pBigSrc)[4];
case 4: ((uint8_t BS3_FAR *)pBigDst)[3] = ((const uint8_t BS3_FAR *)pBigSrc)[3];
#endif
#if TMPL_BITS >= 32
case 3: ((uint8_t BS3_FAR *)pBigDst)[2] = ((const uint8_t BS3_FAR *)pBigSrc)[2];
case 2: ((uint8_t BS3_FAR *)pBigDst)[1] = ((const uint8_t BS3_FAR *)pBigSrc)[1];
#endif
case 1: ((uint8_t BS3_FAR *)pBigDst)[0] = ((const uint8_t BS3_FAR *)pBigSrc)[0];
case 0:
break;
}
#else
size_t cLargeRounds;
BS3CPTRUNION uSrc;
BS3PTRUNION uDst;
uSrc.pv = pvSrc;
uDst.pv = pvDst;
cLargeRounds = cbToCopy / sizeof(*uSrc.pcb);
while (cLargeRounds-- > 0)
*uDst.pcb++ = *uSrc.pcb++;
cbToCopy %= sizeof(*uSrc.pcb);
while (cbToCopy-- > 0)
*uDst.pb++ = *uSrc.pb++;
#endif
return pvDst;
}
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