2010-10-12 08:56:41 -05:00
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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2008-01-17 01:06:10 -06:00
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/*************************************************************************
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*
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2008-04-10 09:42:51 -05:00
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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2008-01-17 01:06:10 -06:00
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*
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2010-02-12 08:01:35 -06:00
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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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2008-01-17 01:06:10 -06:00
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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 <com/sun/star/io/XSeekable.hpp>
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#include <osl/diagnose.h>
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namespace oox {
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// ============================================================================
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using namespace ::com::sun::star::io;
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using namespace ::com::sun::star::uno;
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// ============================================================================
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BinaryStreamBase::~BinaryStreamBase()
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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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// do not use isSeekable(), implementations may provide stream position and size even if not seekable
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sal_Int64 nPos = tell();
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sal_Int64 nLen = size();
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return ((nPos >= 0) && (nLen >= 0)) ? ::std::max< sal_Int64 >( nLen - nPos, 0 ) : -1;
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}
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void BinaryStreamBase::alignToBlock( sal_Int32 nBlockSize, sal_Int64 nAnchorPos )
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{
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sal_Int64 nStrmPos = tell();
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// nothing to do, if stream is at anchor position
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if( mbSeekable && (0 <= nAnchorPos) && (nAnchorPos != nStrmPos) && (nBlockSize > 1) )
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{
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// prevent modulo with negative arguments...
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sal_Int64 nSkipSize = (nAnchorPos < nStrmPos) ?
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(nBlockSize - ((nStrmPos - nAnchorPos - 1) % nBlockSize) - 1) :
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((nAnchorPos - nStrmPos) % nBlockSize);
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seek( nStrmPos + nSkipSize );
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}
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}
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// ============================================================================
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BinaryXSeekableStream::BinaryXSeekableStream( const Reference< XSeekable >& rxSeekable ) :
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BinaryStreamBase( mxSeekable.is() ),
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mxSeekable( rxSeekable )
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{
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}
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BinaryXSeekableStream::~BinaryXSeekableStream()
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{
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}
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sal_Int64 BinaryXSeekableStream::size() 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_FAIL( "BinaryXSeekableStream::size - 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_FAIL( "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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void BinaryXSeekableStream::close()
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{
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mxSeekable.clear();
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mbEof = true;
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}
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// ============================================================================
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SequenceSeekableStream::SequenceSeekableStream( const StreamDataSequence& rData ) :
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BinaryStreamBase( true ),
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mpData( &rData ),
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mnPos( 0 )
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{
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}
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sal_Int64 SequenceSeekableStream::size() const
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{
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return mpData ? mpData->getLength() : -1;
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}
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sal_Int64 SequenceSeekableStream::tell() const
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{
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return mpData ? mnPos : -1;
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}
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void SequenceSeekableStream::seek( sal_Int64 nPos )
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{
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if( mpData )
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{
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mnPos = getLimitedValue< sal_Int32, sal_Int64 >( nPos, 0, mpData->getLength() );
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mbEof = mnPos != nPos;
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}
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}
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void SequenceSeekableStream::close()
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{
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mpData = 0;
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mbEof = true;
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}
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// ============================================================================
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2008-01-17 01:06:10 -06:00
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} // namespace oox
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2010-10-12 08:56:41 -05:00
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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