Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include "oox/helper/binarystreambase.hxx"
      21             : 
      22             : #include <com/sun/star/io/XSeekable.hpp>
      23             : #include <osl/diagnose.h>
      24             : 
      25             : namespace oox {
      26             : 
      27             : using namespace ::com::sun::star::io;
      28             : using namespace ::com::sun::star::uno;
      29             : 
      30       13614 : BinaryStreamBase::~BinaryStreamBase()
      31             : {
      32       13614 : }
      33             : 
      34         180 : sal_Int64 BinaryStreamBase::getRemaining() const
      35             : {
      36             :     // do not use isSeekable(), implementations may provide stream position and size even if not seekable
      37         180 :     sal_Int64 nPos = tell();
      38         180 :     sal_Int64 nLen = size();
      39         180 :     return ((nPos >= 0) && (nLen >= 0)) ? ::std::max< sal_Int64 >( nLen - nPos, 0 ) : -1;
      40             : }
      41             : 
      42           4 : void BinaryStreamBase::alignToBlock( sal_Int32 nBlockSize, sal_Int64 nAnchorPos )
      43             : {
      44           4 :     sal_Int64 nStrmPos = tell();
      45             :     // nothing to do, if stream is at anchor position
      46           4 :     if( mbSeekable && (0 <= nAnchorPos) && (nAnchorPos != nStrmPos) && (nBlockSize > 1) )
      47             :     {
      48             :         // prevent modulo with negative arguments...
      49             :         sal_Int64 nSkipSize = (nAnchorPos < nStrmPos) ?
      50           4 :             (nBlockSize - ((nStrmPos - nAnchorPos - 1) % nBlockSize) - 1) :
      51           8 :             ((nAnchorPos - nStrmPos) % nBlockSize);
      52           4 :         seek( nStrmPos + nSkipSize );
      53             :     }
      54           4 : }
      55             : 
      56        8188 : BinaryXSeekableStream::BinaryXSeekableStream( const Reference< XSeekable >& rxSeekable ) :
      57           0 :     BinaryStreamBase( rxSeekable.is() ),
      58        8188 :     mxSeekable( rxSeekable )
      59             : {
      60        8188 : }
      61             : 
      62        8188 : BinaryXSeekableStream::~BinaryXSeekableStream()
      63             : {
      64        8188 : }
      65             : 
      66         222 : sal_Int64 BinaryXSeekableStream::size() const
      67             : {
      68         222 :     if( mxSeekable.is() ) try
      69             :     {
      70         222 :         return mxSeekable->getLength();
      71             :     }
      72           0 :     catch( Exception& )
      73             :     {
      74             :         OSL_FAIL( "BinaryXSeekableStream::size - exception caught" );
      75             :     }
      76           0 :     return -1;
      77             : }
      78             : 
      79         742 : sal_Int64 BinaryXSeekableStream::tell() const
      80             : {
      81         742 :     if( mxSeekable.is() ) try
      82             :     {
      83         742 :         return mxSeekable->getPosition();
      84             :     }
      85           0 :     catch( Exception& )
      86             :     {
      87             :         OSL_FAIL( "BinaryXSeekableStream::tell - exception caught" );
      88             :     }
      89           0 :     return -1;
      90             : }
      91             : 
      92         830 : void BinaryXSeekableStream::seek( sal_Int64 nPos )
      93             : {
      94         830 :     if( mxSeekable.is() ) try
      95             :     {
      96         830 :         mbEof = false;
      97         830 :         mxSeekable->seek( nPos );
      98             :     }
      99           0 :     catch( Exception& )
     100             :     {
     101           0 :         mbEof = true;
     102             :     }
     103         830 : }
     104             : 
     105        8188 : void BinaryXSeekableStream::close()
     106             : {
     107        8188 :     mxSeekable.clear();
     108        8188 :     mbEof = true;
     109        8188 : }
     110             : 
     111        4882 : SequenceSeekableStream::SequenceSeekableStream( const StreamDataSequence& rData ) :
     112             :     BinaryStreamBase( true ),
     113             :     mpData( &rData ),
     114        4882 :     mnPos( 0 )
     115             : {
     116        4882 : }
     117             : 
     118           0 : sal_Int64 SequenceSeekableStream::size() const
     119             : {
     120           0 :     return mpData ? mpData->getLength() : -1;
     121             : }
     122             : 
     123           0 : sal_Int64 SequenceSeekableStream::tell() const
     124             : {
     125           0 :     return mpData ? mnPos : -1;
     126             : }
     127             : 
     128           0 : void SequenceSeekableStream::seek( sal_Int64 nPos )
     129             : {
     130           0 :     if( mpData )
     131             :     {
     132           0 :         mnPos = getLimitedValue< sal_Int32, sal_Int64 >( nPos, 0, mpData->getLength() );
     133           0 :         mbEof = mnPos != nPos;
     134             :     }
     135           0 : }
     136             : 
     137           0 : void SequenceSeekableStream::close()
     138             : {
     139           0 :     mpData = 0;
     140           0 :     mbEof = true;
     141           0 : }
     142             : 
     143             : } // namespace oox
     144             : 
     145             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */