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Diffstat (limited to 'include/oox/ole/vbainputstream.hxx')
-rw-r--r-- | include/oox/ole/vbainputstream.hxx | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/include/oox/ole/vbainputstream.hxx b/include/oox/ole/vbainputstream.hxx new file mode 100644 index 000000000000..7e0cd4986bd7 --- /dev/null +++ b/include/oox/ole/vbainputstream.hxx @@ -0,0 +1,74 @@ +/* -*- 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 . + */ + +#ifndef OOX_OLE_VBAINPUTSTREAM_HXX +#define OOX_OLE_VBAINPUTSTREAM_HXX + +#include <vector> +#include "oox/helper/binaryinputstream.hxx" + +namespace oox { +namespace ole { + +// ============================================================================ + +/** A non-seekable input stream that implements run-length decompression. */ +class VbaInputStream : public BinaryInputStream +{ +public: + explicit VbaInputStream( BinaryInputStream& rInStrm ); + + /** Returns -1, stream size is not determinable. */ + virtual sal_Int64 size() const; + /** Returns -1, stream position is not tracked. */ + virtual sal_Int64 tell() const; + /** Does nothing, stream is not seekable. */ + virtual void seek( sal_Int64 nPos ); + /** Closes the input stream but not the wrapped stream. */ + virtual void close(); + + /** Reads nBytes bytes to the passed sequence. + @return Number of bytes really read. */ + virtual sal_Int32 readData( StreamDataSequence& orData, sal_Int32 nBytes, size_t nAtomSize = 1 ); + /** Reads nBytes bytes to the (existing) buffer opMem. + @return Number of bytes really read. */ + virtual sal_Int32 readMemory( void* opMem, sal_Int32 nBytes, size_t nAtomSize = 1 ); + /** Seeks the stream forward by the passed number of bytes. */ + virtual void skip( sal_Int32 nBytes, size_t nAtomSize = 1 ); + +private: + /** If no data left in chunk buffer, reads the next chunk from stream. */ + bool updateChunk(); + +private: + typedef ::std::vector< sal_uInt8 > ChunkBuffer; + + BinaryInputStream* mpInStrm; + ChunkBuffer maChunk; + size_t mnChunkPos; +}; + +// ============================================================================ + +} // namespace ole +} // namespace oox + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |