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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_tools.hxx"
#include <tools/debug.hxx>
#include <tools/stream.hxx>
#include <tools/cachestr.hxx>
#include <tools/tempfile.hxx>
/*************************************************************************
|*
|* SvCacheStream::SvCacheStream()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
SvCacheStream::SvCacheStream( ULONG nMaxMemSize )
{
if( !nMaxMemSize )
nMaxMemSize = 20480;
SvStream::bIsWritable = TRUE;
nMaxSize = nMaxMemSize;
bPersistent = FALSE;
pSwapStream = 0;
pCurrentStream = new SvMemoryStream( nMaxMemSize );
pTempFile = 0;
}
/*************************************************************************
|*
|* SvCacheStream::SvCacheStream()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
SvCacheStream::SvCacheStream( const String &rFileName,
ULONG nExpectedSize,
ULONG nMaxMemSize )
{
if( !nMaxMemSize )
nMaxMemSize = 20480;
if( nExpectedSize > nMaxMemSize )
nExpectedSize = nMaxMemSize; // oder gleich in File schreiben
else if( !nExpectedSize )
nExpectedSize = 4096;
SvStream::bIsWritable = TRUE;
nMaxSize = nMaxMemSize;
bPersistent = TRUE;
aFileName = rFileName;
pSwapStream = 0;
pCurrentStream = new SvMemoryStream( nExpectedSize );
pTempFile = 0;
}
/*************************************************************************
|*
|* SvCacheStream::~SvCacheStream()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
SvCacheStream::~SvCacheStream()
{
if( pCurrentStream != pSwapStream )
delete pSwapStream;
delete pCurrentStream;
if( pSwapStream && !bPersistent && pTempFile )
{
// temporaeres File loeschen
pTempFile->EnableKillingFile( TRUE );
}
delete pTempFile;
}
/*************************************************************************
|*
|* SvCacheStream::SwapOut()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
void SvCacheStream::SwapOut()
{
if( pCurrentStream != pSwapStream )
{
if( !pSwapStream && !aFileName.Len() )
{
if (aFilenameLinkHdl.IsSet())
{
// pSwapStream wird zum Schutz gegen Reentranz genutzt
pSwapStream = pCurrentStream;
Link aLink( aFilenameLinkHdl );
aFilenameLinkHdl = Link();
aLink.Call(this);
// pSwapStream nur zuruecksetzen, wenn nicht ueber
// SetSwapStream geaendert
if( pSwapStream == pCurrentStream ) pSwapStream = 0;
}
else
{
pTempFile = new TempFile;
aFileName = pTempFile->GetName();
}
}
ULONG nPos = pCurrentStream->Tell();
pCurrentStream->Seek( 0 );
if( !pSwapStream )
pSwapStream = new SvFileStream( aFileName, STREAM_READWRITE | STREAM_TRUNC );
*pSwapStream << *pCurrentStream;
pSwapStream->Flush();
delete pCurrentStream;
pCurrentStream = pSwapStream;
pCurrentStream->Seek( nPos );
}
}
/*************************************************************************
|*
|* SvCacheStream::GetData()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
ULONG SvCacheStream::GetData( void* pData, ULONG nSize )
{
return pCurrentStream->Read( pData, nSize );
}
/*************************************************************************
|*
|* SvCacheStream::PutData()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
ULONG SvCacheStream::PutData( const void* pData, ULONG nSize )
{
// lieber unnoetig auslagern als unnoetig umkopieren
if( pCurrentStream != pSwapStream
&& pCurrentStream->Tell() + nSize > nMaxSize )
SwapOut();
return pCurrentStream->Write( pData, nSize );
}
/*************************************************************************
|*
|* SvCacheStream::SeekPos()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
ULONG SvCacheStream::SeekPos( ULONG nPos )
{
return pCurrentStream->Seek( nPos );
}
/*************************************************************************
|*
|* SvCacheStream::FlushData()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
void SvCacheStream::FlushData()
{
pCurrentStream->Flush();
if( pCurrentStream != pSwapStream
&& ((SvMemoryStream*)pCurrentStream)->GetSize() > nMaxSize )
SwapOut();
}
/*************************************************************************
|*
|* SvCacheStream::GetStr()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
const void* SvCacheStream::GetBuffer()
{
Flush();
if( pCurrentStream != pSwapStream )
return ((SvMemoryStream*)pCurrentStream)->GetData();
else
return 0;
}
/*************************************************************************
|*
|* SvCacheStream::SetSize()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
void SvCacheStream::SetSize( ULONG nSize )
{
pCurrentStream->SetStreamSize( nSize );
}
/*************************************************************************
|*
|* SvCacheStream::GetSize()
|*
|* Beschreibung STREAM.SDW
|* Ersterstellung OV 27.09.94
|* Letzte Aenderung OV 27.09.94
|*
*************************************************************************/
ULONG SvCacheStream::GetSize()
{
// ACHTUNG: SvMemoryStream::GetSize() gibt Groesse
// des allozierten Buffers zurueck
Flush();
ULONG nTemp = Tell();
ULONG nLength = Seek( STREAM_SEEK_TO_END );
Seek( nTemp );
return nLength;
}
void SvCacheStream::SetFilenameHdl( const Link& rLink)
{
aFilenameLinkHdl = rLink;
}
const Link& SvCacheStream::GetFilenameHdl() const
{
return aFilenameLinkHdl;
}
|
