| /** |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef BLOCKCODEC_H_ |
| #define BLOCKCODEC_H_ |
| |
| #include "lib/Compressions.h" |
| |
| namespace NativeTask { |
| |
| class BlockCompressStream : public CompressStream { |
| protected: |
| uint32_t _hint; |
| uint32_t _blockMax; |
| char * _tempBuffer; |
| uint32_t _tempBufferSize; |
| uint64_t _compressedBytesWritten; |
| public: |
| BlockCompressStream(OutputStream * stream, uint32_t bufferSizeHint); |
| |
| virtual ~BlockCompressStream(); |
| |
| virtual void write(const void * buff, uint32_t length); |
| |
| virtual void flush(); |
| |
| virtual void close(); |
| |
| virtual void writeDirect(const void * buff, uint32_t length); |
| |
| virtual uint64_t compressedBytesWritten(); |
| |
| void init(); |
| |
| protected: |
| virtual uint64_t maxCompressedLength(uint64_t origLength) { |
| return origLength; |
| } |
| |
| virtual void compressOneBlock(const void * buff, uint32_t length) { |
| } |
| }; |
| |
| class BlockDecompressStream : public DecompressStream { |
| protected: |
| uint32_t _hint; |
| uint32_t _blockMax; |
| char * _tempBuffer; |
| uint32_t _tempBufferSize; |
| char * _tempDecompressBuffer; |
| uint32_t _tempDecompressBufferSize; |
| uint32_t _tempDecompressBufferUsed; |
| uint32_t _tempDecompressBufferCapacity; |
| uint64_t _compressedBytesRead; |
| public: |
| BlockDecompressStream(InputStream * stream, uint32_t bufferSizeHint); |
| |
| virtual ~BlockDecompressStream(); |
| |
| virtual int32_t read(void * buff, uint32_t length); |
| |
| virtual void close(); |
| |
| virtual int32_t readDirect(void * buff, uint32_t length); |
| |
| virtual uint64_t compressedBytesRead(); |
| |
| void init(); |
| |
| protected: |
| virtual uint64_t maxCompressedLength(uint64_t origLength) { |
| return origLength; |
| } |
| |
| virtual uint32_t decompressOneBlock(uint32_t compressedSize, void * buff, uint32_t length) { |
| //TODO: add implementation |
| return 0; |
| } |
| }; |
| |
| } // namespace NativeTask |
| |
| #endif /* BLOCKCODEC_H_ */ |