195 lines
5.7 KiB
C++
195 lines
5.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include <tools/stream.hxx>
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#include <tools/cachestr.hxx>
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#include <tools/tempfile.hxx>
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/*************************************************************************
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|*
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|* SvCacheStream::SvCacheStream()
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|*
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*************************************************************************/
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SvCacheStream::SvCacheStream( sal_uIntPtr nMaxMemSize )
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{
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if( !nMaxMemSize )
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nMaxMemSize = 20480;
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SvStream::bIsWritable = sal_True;
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nMaxSize = nMaxMemSize;
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bPersistent = sal_False;
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pSwapStream = 0;
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pCurrentStream = new SvMemoryStream( nMaxMemSize );
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pTempFile = 0;
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}
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/*************************************************************************
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|*
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|* SvCacheStream::~SvCacheStream()
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|*
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*************************************************************************/
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SvCacheStream::~SvCacheStream()
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{
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if( pCurrentStream != pSwapStream )
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delete pSwapStream;
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delete pCurrentStream;
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if( pSwapStream && !bPersistent && pTempFile )
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{
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// temporaeres File loeschen
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pTempFile->EnableKillingFile( sal_True );
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}
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delete pTempFile;
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}
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/*************************************************************************
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|*
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|* SvCacheStream::SwapOut()
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|*
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*************************************************************************/
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void SvCacheStream::SwapOut()
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{
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if( pCurrentStream != pSwapStream )
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{
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if( !pSwapStream && !aFileName.Len() )
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{
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pTempFile = new TempFile;
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aFileName = pTempFile->GetName();
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}
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sal_uIntPtr nPos = pCurrentStream->Tell();
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pCurrentStream->Seek( 0 );
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if( !pSwapStream )
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pSwapStream = new SvFileStream( aFileName, STREAM_READWRITE | STREAM_TRUNC );
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*pSwapStream << *pCurrentStream;
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pSwapStream->Flush();
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delete pCurrentStream;
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pCurrentStream = pSwapStream;
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pCurrentStream->Seek( nPos );
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}
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}
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/*************************************************************************
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|*
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|* SvCacheStream::GetData()
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|*
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*************************************************************************/
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sal_uIntPtr SvCacheStream::GetData( void* pData, sal_uIntPtr nSize )
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{
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return pCurrentStream->Read( pData, nSize );
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}
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/*************************************************************************
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|*
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|* SvCacheStream::PutData()
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|*
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*************************************************************************/
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sal_uIntPtr SvCacheStream::PutData( const void* pData, sal_uIntPtr nSize )
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{
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// lieber unnoetig auslagern als unnoetig umkopieren
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if( pCurrentStream != pSwapStream
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&& pCurrentStream->Tell() + nSize > nMaxSize )
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SwapOut();
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return pCurrentStream->Write( pData, nSize );
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}
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/*************************************************************************
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|*
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|* SvCacheStream::SeekPos()
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|*
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*************************************************************************/
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sal_uIntPtr SvCacheStream::SeekPos( sal_uIntPtr nPos )
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{
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return pCurrentStream->Seek( nPos );
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}
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/*************************************************************************
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|*
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|* SvCacheStream::FlushData()
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|*
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*************************************************************************/
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void SvCacheStream::FlushData()
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{
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pCurrentStream->Flush();
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if( pCurrentStream != pSwapStream
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&& ((SvMemoryStream*)pCurrentStream)->GetSize() > nMaxSize )
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SwapOut();
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}
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/*************************************************************************
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|*
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|* SvCacheStream::GetStr()
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|*
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*************************************************************************/
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const void* SvCacheStream::GetBuffer()
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{
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Flush();
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if( pCurrentStream != pSwapStream )
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return ((SvMemoryStream*)pCurrentStream)->GetData();
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else
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return 0;
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}
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/*************************************************************************
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|*
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|* SvCacheStream::SetSize()
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|*
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*************************************************************************/
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void SvCacheStream::SetSize( sal_uIntPtr nSize )
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{
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pCurrentStream->SetStreamSize( nSize );
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}
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/*************************************************************************
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|*
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|* SvCacheStream::GetSize()
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|*
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*************************************************************************/
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sal_uIntPtr SvCacheStream::GetSize()
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{
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// ACHTUNG: SvMemoryStream::GetSize() gibt Groesse
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// des allozierten Buffers zurueck
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Flush();
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sal_uIntPtr nTemp = Tell();
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sal_uIntPtr nLength = Seek( STREAM_SEEK_TO_END );
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Seek( nTemp );
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return nLength;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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