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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#include <oox/helper/binarystreambase.hxx>
#include <oox/helper/helper.hxx>
#include <com/sun/star/io/XSeekable.hpp>
#include <osl/diagnose.h>
namespace oox {
using namespace ::com::sun::star::io;
using namespace ::com::sun::star::uno;
BinaryStreamBase::~BinaryStreamBase()
{
}
sal_Int64 BinaryStreamBase::getRemaining() const
{
// do not use isSeekable(), implementations may provide stream position and size even if not seekable
sal_Int64 nPos = tell();
sal_Int64 nLen = size();
return ((nPos >= 0) && (nLen >= 0)) ? ::std::max< sal_Int64 >( nLen - nPos, 0 ) : -1;
}
void BinaryStreamBase::alignToBlock( sal_Int32 nBlockSize, sal_Int64 nAnchorPos )
{
sal_Int64 nStrmPos = tell();
// nothing to do, if stream is at anchor position
if( mbSeekable && (0 <= nAnchorPos) && (nAnchorPos != nStrmPos) && (nBlockSize > 1) )
{
// prevent modulo with negative arguments...
sal_Int64 nSkipSize = (nAnchorPos < nStrmPos) ?
(nBlockSize - ((nStrmPos - nAnchorPos - 1) % nBlockSize) - 1) :
((nAnchorPos - nStrmPos) % nBlockSize);
seek( nStrmPos + nSkipSize );
}
}
BinaryXSeekableStream::BinaryXSeekableStream( const Reference< XSeekable >& rxSeekable ) :
BinaryStreamBase( rxSeekable.is() ),
mxSeekable( rxSeekable )
{
}
BinaryXSeekableStream::~BinaryXSeekableStream()
{
}
sal_Int64 BinaryXSeekableStream::size() const
{
if( mxSeekable.is() ) try
{
return mxSeekable->getLength();
}
catch( Exception& )
{
OSL_FAIL( "BinaryXSeekableStream::size - exception caught" );
}
return -1;
}
sal_Int64 BinaryXSeekableStream::tell() const
{
if( mxSeekable.is() ) try
{
return mxSeekable->getPosition();
}
catch( Exception& )
{
OSL_FAIL( "BinaryXSeekableStream::tell - exception caught" );
}
return -1;
}
void BinaryXSeekableStream::seek( sal_Int64 nPos )
{
if( mxSeekable.is() ) try
{
mbEof = false;
mxSeekable->seek( nPos );
}
catch( Exception& )
{
mbEof = true;
}
}
void BinaryXSeekableStream::close()
{
mxSeekable.clear();
mbEof = true;
}
SequenceSeekableStream::SequenceSeekableStream( const StreamDataSequence& rData ) :
BinaryStreamBase( true ),
mpData( &rData ),
mnPos( 0 )
{
}
sal_Int64 SequenceSeekableStream::size() const
{
return mpData ? mpData->getLength() : -1;
}
sal_Int64 SequenceSeekableStream::tell() const
{
return mpData ? mnPos : -1;
}
void SequenceSeekableStream::seek( sal_Int64 nPos )
{
if( mpData )
{
mnPos = getLimitedValue< sal_Int32, sal_Int64 >( nPos, 0, mpData->getLength() );
mbEof = mnPos != nPos;
}
}
void SequenceSeekableStream::close()
{
mpData = nullptr;
mbEof = true;
}
} // namespace oox
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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