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             : #ifndef OOX_OLE_VBAINPUTSTREAM_HXX
      21             : #define OOX_OLE_VBAINPUTSTREAM_HXX
      22             : 
      23             : #include <vector>
      24             : #include "oox/helper/binaryinputstream.hxx"
      25             : 
      26             : namespace oox {
      27             : namespace ole {
      28             : 
      29             : // ============================================================================
      30             : 
      31             : /** A non-seekable input stream that implements run-length decompression. */
      32          18 : class VbaInputStream : public BinaryInputStream
      33             : {
      34             : public:
      35             :     explicit            VbaInputStream( BinaryInputStream& rInStrm );
      36             : 
      37             :     /** Returns -1, stream size is not determinable. */
      38             :     virtual sal_Int64   size() const;
      39             :     /** Returns -1, stream position is not tracked. */
      40             :     virtual sal_Int64   tell() const;
      41             :     /** Does nothing, stream is not seekable. */
      42             :     virtual void        seek( sal_Int64 nPos );
      43             :     /** Closes the input stream but not the wrapped stream. */
      44             :     virtual void        close();
      45             : 
      46             :     /** Reads nBytes bytes to the passed sequence.
      47             :         @return  Number of bytes really read. */
      48             :     virtual sal_Int32   readData( StreamDataSequence& orData, sal_Int32 nBytes, size_t nAtomSize = 1 );
      49             :     /** Reads nBytes bytes to the (existing) buffer opMem.
      50             :         @return  Number of bytes really read. */
      51             :     virtual sal_Int32   readMemory( void* opMem, sal_Int32 nBytes, size_t nAtomSize = 1 );
      52             :     /** Seeks the stream forward by the passed number of bytes. */
      53             :     virtual void        skip( sal_Int32 nBytes, size_t nAtomSize = 1 );
      54             : 
      55             : private:
      56             :     /** If no data left in chunk buffer, reads the next chunk from stream. */
      57             :     bool                updateChunk();
      58             : 
      59             : private:
      60             :     typedef ::std::vector< sal_uInt8 > ChunkBuffer;
      61             : 
      62             :     BinaryInputStream*  mpInStrm;
      63             :     ChunkBuffer         maChunk;
      64             :     size_t              mnChunkPos;
      65             : };
      66             : 
      67             : // ============================================================================
      68             : 
      69             : } // namespace ole
      70          51 : } // namespace oox
      71             : 
      72             : #endif
      73             : 
      74             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */