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/* $Id: RTFileCopyByHandlesEx-generic.cpp $ */
/** @file
* IPRT - RTFileCopyByHandlesEx, generic implementation.
*/
/*
* Copyright (C) 2006-2022 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
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/file.h>
#include <iprt/alloca.h>
#include <iprt/assert.h>
#include <iprt/mem.h>
#include <iprt/errcore.h>
RTDECL(int) RTFileCopyByHandlesEx(RTFILE hFileSrc, RTFILE hFileDst, PFNRTPROGRESS pfnProgress, void *pvUser)
{
/*
* Validate input.
*/
AssertMsgReturn(RTFileIsValid(hFileSrc), ("hFileSrc=%RTfile\n", hFileSrc), VERR_INVALID_PARAMETER);
AssertMsgReturn(RTFileIsValid(hFileDst), ("hFileDst=%RTfile\n", hFileDst), VERR_INVALID_PARAMETER);
AssertPtrNullReturn(pfnProgress, VERR_INVALID_POINTER);
/*
* Save file offset.
*/
uint64_t offSrcSaved;
int rc = RTFileSeek(hFileSrc, 0, RTFILE_SEEK_CURRENT, &offSrcSaved);
if (RT_FAILURE(rc))
return rc;
/*
* Get the file size and figure out how much we'll copy at a time.
*/
uint64_t cbSrc;
rc = RTFileQuerySize(hFileSrc, &cbSrc);
if (RT_FAILURE(rc))
return rc;
uint64_t cbChunk = cbSrc;
if (pfnProgress && cbSrc > _1M)
{
cbChunk /= 100;
if (cbChunk > _64M)
cbChunk = RT_ALIGN_64(cbChunk, _2M);
else
cbChunk = RT_ALIGN_64(cbChunk, _128K);
}
/*
* Prepare buffers.
*/
RTFILECOPYPARTBUFSTATE BufState;
rc = RTFileCopyPartPrep(&BufState, cbChunk);
if (RT_SUCCESS(rc))
{
/*
* Prepare the destination file.
*/
uint64_t cbDst;
rc = RTFileQuerySize(hFileDst, &cbDst);
if (RT_SUCCESS(rc) && cbDst > cbSrc)
rc = RTFileSetSize(hFileDst, cbSrc);
if (RT_SUCCESS(rc) && cbDst < cbSrc)
{
rc = RTFileSetAllocationSize(hFileDst, cbSrc, RTFILE_ALLOC_SIZE_F_DEFAULT);
if (rc == VERR_NOT_SUPPORTED)
rc = RTFileSetSize(hFileDst, cbSrc);
}
if (RT_SUCCESS(rc))
{
/*
* Copy loop that works till we reach EOF.
*/
RTFOFF off = 0;
RTFOFF cbPercent = cbSrc / 100;
RTFOFF offNextPercent = pfnProgress ? cbPercent : RTFOFF_MAX;
unsigned uPercentage = pfnProgress ? 0 : 100;
for (;;)
{
/*
* Copy a block.
*/
uint64_t cbCopied = 0;
rc = RTFileCopyPartEx(hFileSrc, off, hFileDst, off, cbChunk, 0 /*fFlags*/, &BufState, &cbCopied);
if (RT_FAILURE(rc))
break;
if (cbCopied == 0)
{
/*
* We reached the EOF. Complete the copy operation.
*/
rc = RTFileSetSize(hFileDst, off);
if (RT_SUCCESS(rc))
rc = RTFileCopyAttributes(hFileSrc, hFileDst, 0);
break;
}
/*
* Advance and work the progress callback.
*/
off += cbCopied;
if ( off >= offNextPercent
&& pfnProgress
&& uPercentage < 99)
{
do
{
uPercentage++;
offNextPercent += cbPercent;
} while ( offNextPercent <= off
&& uPercentage < 99);
rc = pfnProgress(uPercentage, pvUser);
if (RT_FAILURE(rc))
break;
}
}
}
RTFileCopyPartCleanup(&BufState);
/*
* 100%.
*/
if ( pfnProgress
&& RT_SUCCESS(rc))
rc = pfnProgress(100, pvUser);
}
/*
* Restore source position.
*/
RTFileSeek(hFileSrc, offSrcSaved, RTFILE_SEEK_BEGIN, NULL);
return rc;
}
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