147 lines
3.4 KiB
C++
147 lines
3.4 KiB
C++
/*************************************************************************
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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 2008 by Sun Microsystems, Inc.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: binarystreambase.cxx,v $
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* $Revision: 1.3.22.2 $
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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 "oox/helper/binarystreambase.hxx"
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#include <osl/diagnose.h>
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using ::com::sun::star::uno::Reference;
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using ::com::sun::star::uno::Exception;
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using ::com::sun::star::io::XSeekable;
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namespace oox {
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// ============================================================================
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BinaryStreamBase::~BinaryStreamBase()
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{
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}
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bool BinaryStreamBase::isSeekable() const
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{
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return false;
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}
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sal_Int64 BinaryStreamBase::getLength() const
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{
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return -1;
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}
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sal_Int64 BinaryStreamBase::tell() const
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{
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return -1;
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}
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void BinaryStreamBase::seek( sal_Int64 )
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{
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}
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sal_Int64 BinaryStreamBase::getRemaining() const
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{
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return isSeekable() ? ::std::max< sal_Int64 >( getLength() - tell(), 0 ) : -1;
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}
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// ============================================================================
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BinaryXSeekableStream::BinaryXSeekableStream( const Reference< XSeekable >& rxSeekable ) :
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mxSeekable( rxSeekable )
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{
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}
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bool BinaryXSeekableStream::isSeekable() const
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{
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return mxSeekable.is();
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}
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sal_Int64 BinaryXSeekableStream::getLength() const
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{
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if( mxSeekable.is() ) try
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{
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return mxSeekable->getLength();
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}
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catch( Exception& )
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{
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OSL_ENSURE( false, "BinaryXSeekableStream::getLength - exception caught" );
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}
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return -1;
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}
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sal_Int64 BinaryXSeekableStream::tell() const
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{
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if( mxSeekable.is() ) try
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{
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return mxSeekable->getPosition();
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}
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catch( Exception& )
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{
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OSL_ENSURE( false, "BinaryXSeekableStream::tell - exception caught" );
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}
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return -1;
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}
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void BinaryXSeekableStream::seek( sal_Int64 nPos )
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{
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if( mxSeekable.is() ) try
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{
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mbEof = false;
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mxSeekable->seek( nPos );
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}
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catch( Exception& )
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{
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mbEof = true;
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}
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}
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// ============================================================================
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bool SequenceSeekableStream::isSeekable() const
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{
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return true;
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}
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sal_Int64 SequenceSeekableStream::getLength() const
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{
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return mrData.getLength();
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}
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sal_Int64 SequenceSeekableStream::tell() const
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{
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return mnPos;
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}
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void SequenceSeekableStream::seek( sal_Int64 nPos )
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{
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mnPos = getLimitedValue< sal_Int32, sal_Int64 >( nPos, 0, mrData.getLength() );
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mbEof = mnPos < nPos;
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}
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// ============================================================================
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} // namespace oox
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