1*e3508121SAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*e3508121SAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*e3508121SAndrew Rist * or more contributor license agreements. See the NOTICE file 5*e3508121SAndrew Rist * distributed with this work for additional information 6*e3508121SAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*e3508121SAndrew Rist * to you under the Apache License, Version 2.0 (the 8*e3508121SAndrew Rist * "License"); you may not use this file except in compliance 9*e3508121SAndrew Rist * with the License. You may obtain a copy of the License at 10*e3508121SAndrew Rist * 11*e3508121SAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*e3508121SAndrew Rist * 13*e3508121SAndrew Rist * Unless required by applicable law or agreed to in writing, 14*e3508121SAndrew Rist * software distributed under the License is distributed on an 15*e3508121SAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*e3508121SAndrew Rist * KIND, either express or implied. See the License for the 17*e3508121SAndrew Rist * specific language governing permissions and limitations 18*e3508121SAndrew Rist * under the License. 19*e3508121SAndrew Rist * 20*e3508121SAndrew Rist *************************************************************/ 21*e3508121SAndrew Rist 22*e3508121SAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir #ifndef OOX_OLE_VBAINPUTSTREAM_HXX 25cdf0e10cSrcweir #define OOX_OLE_VBAINPUTSTREAM_HXX 26cdf0e10cSrcweir 27cdf0e10cSrcweir #include <vector> 28cdf0e10cSrcweir #include "oox/helper/binaryinputstream.hxx" 29cdf0e10cSrcweir 30cdf0e10cSrcweir namespace oox { 31cdf0e10cSrcweir namespace ole { 32cdf0e10cSrcweir 33cdf0e10cSrcweir // ============================================================================ 34cdf0e10cSrcweir 35cdf0e10cSrcweir /** A non-seekable input stream that implements run-length decompression. */ 36cdf0e10cSrcweir class VbaInputStream : public BinaryInputStream 37cdf0e10cSrcweir { 38cdf0e10cSrcweir public: 39cdf0e10cSrcweir explicit VbaInputStream( BinaryInputStream& rInStrm ); 40cdf0e10cSrcweir 41cdf0e10cSrcweir /** Returns -1, stream size is not determinable. */ 42cdf0e10cSrcweir virtual sal_Int64 size() const; 43cdf0e10cSrcweir /** Returns -1, stream position is not tracked. */ 44cdf0e10cSrcweir virtual sal_Int64 tell() const; 45cdf0e10cSrcweir /** Does nothing, stream is not seekable. */ 46cdf0e10cSrcweir virtual void seek( sal_Int64 nPos ); 47cdf0e10cSrcweir /** Closes the input stream but not the wrapped stream. */ 48cdf0e10cSrcweir virtual void close(); 49cdf0e10cSrcweir 50cdf0e10cSrcweir /** Reads nBytes bytes to the passed sequence. 51cdf0e10cSrcweir @return Number of bytes really read. */ 52cdf0e10cSrcweir virtual sal_Int32 readData( StreamDataSequence& orData, sal_Int32 nBytes, size_t nAtomSize = 1 ); 53cdf0e10cSrcweir /** Reads nBytes bytes to the (existing) buffer opMem. 54cdf0e10cSrcweir @return Number of bytes really read. */ 55cdf0e10cSrcweir virtual sal_Int32 readMemory( void* opMem, sal_Int32 nBytes, size_t nAtomSize = 1 ); 56cdf0e10cSrcweir /** Seeks the stream forward by the passed number of bytes. */ 57cdf0e10cSrcweir virtual void skip( sal_Int32 nBytes, size_t nAtomSize = 1 ); 58cdf0e10cSrcweir 59cdf0e10cSrcweir private: 60cdf0e10cSrcweir /** If no data left in chunk buffer, reads the next chunk from stream. */ 61cdf0e10cSrcweir bool updateChunk(); 62cdf0e10cSrcweir 63cdf0e10cSrcweir private: 64cdf0e10cSrcweir typedef ::std::vector< sal_uInt8 > ChunkBuffer; 65cdf0e10cSrcweir 66cdf0e10cSrcweir BinaryInputStream* mpInStrm; 67cdf0e10cSrcweir ChunkBuffer maChunk; 68cdf0e10cSrcweir size_t mnChunkPos; 69cdf0e10cSrcweir }; 70cdf0e10cSrcweir 71cdf0e10cSrcweir // ============================================================================ 72cdf0e10cSrcweir 73cdf0e10cSrcweir } // namespace ole 74cdf0e10cSrcweir } // namespace oox 75cdf0e10cSrcweir 76cdf0e10cSrcweir #endif 77