7b5193e2ae
See tdf#42949 for motivation Change-Id: I6b4b05a5e59b256653c4caf5297fffd601b45083 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128845 Tested-by: Jenkins Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>
146 lines
3.7 KiB
C++
146 lines
3.7 KiB
C++
/* -*- 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 <tools/diagnose_ex.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& )
|
|
{
|
|
TOOLS_WARN_EXCEPTION( "oox", "BinaryXSeekableStream::size" );
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
sal_Int64 BinaryXSeekableStream::tell() const
|
|
{
|
|
if( mxSeekable.is() ) try
|
|
{
|
|
return mxSeekable->getPosition();
|
|
}
|
|
catch( Exception& )
|
|
{
|
|
TOOLS_WARN_EXCEPTION( "oox", "BinaryXSeekableStream::tell" );
|
|
}
|
|
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: */
|