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+/*************************************************************************
+ *
+ * $RCSfile: cachestr.cxx,v $
+ *
+ * $Revision: 1.1.1.1 $
+ *
+ * last change: $Author: hr $ $Date: 2000-09-18 17:03:09 $
+ *
+ * The Contents of this file are made available subject to the terms of
+ * either of the following licenses
+ *
+ * - GNU Lesser General Public License Version 2.1
+ * - Sun Industry Standards Source License Version 1.1
+ *
+ * Sun Microsystems Inc., October, 2000
+ *
+ * GNU Lesser General Public License Version 2.1
+ * =============================================
+ * Copyright 2000 by Sun Microsystems, Inc.
+ * 901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software Foundation.
+ *
+ * This library 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 for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ *
+ * Sun Industry Standards Source License Version 1.1
+ * =================================================
+ * The contents of this file are subject to the Sun Industry Standards
+ * Source License Version 1.1 (the "License"); You may not use this file
+ * except in compliance with the License. You may obtain a copy of the
+ * License at http://www.openoffice.org/license.html.
+ *
+ * Software provided under this License is provided on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ * See the License for the specific provisions governing your rights and
+ * obligations concerning the Software.
+ *
+ * The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ * Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ * All Rights Reserved.
+ *
+ * Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#include <debug.hxx>
+#include <stream.hxx>
+#include <cachestr.hxx>
+#include <tempfile.hxx>
+
+/*************************************************************************
+|*
+|* SvCacheStream::SvCacheStream()
+|*
+|* Beschreibung STREAM.SDW
+|* Ersterstellung OV 27.09.94
+|* Letzte Aenderung OV 27.09.94
+|*
+*************************************************************************/
+
+SvCacheStream::SvCacheStream( ULONG nMaxMemSize )
+{
+ if( !nMaxMemSize )
+#if defined WIN || defined WNT || defined OS2 || defined MAC || defined UNX
+ nMaxMemSize = 20480;
+#else
+ nMaxMemSize = 20480;
+#endif
+ 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 )
+#if defined WIN || defined WNT || defined OS2 || defined MAC || defined UNX
+ nMaxMemSize = 20480;
+#else
+ nMaxMemSize = 20480;
+#endif
+
+ 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;
+}
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