| /** |
| * Copyright 2016 Yahoo Inc. |
| * |
| * Licensed 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. |
| */ |
| |
| #include "CompressionCodecLZ4.h" |
| |
| #include "lz4/lz4.h" |
| #include <cassert> |
| |
| namespace pulsar { |
| |
| SharedBuffer CompressionCodecLZ4::encode(const SharedBuffer& raw) { |
| // Get the max size of the compressed data and allocate a buffer to hold it |
| int maxCompressedSize = LZ4_compressBound(raw.readableBytes()); |
| SharedBuffer compressed = SharedBuffer::allocate(maxCompressedSize); |
| |
| int compressedSize = LZ4_compress_default(raw.data(), compressed.mutableData(), |
| raw.readableBytes(), maxCompressedSize); |
| assert(compressedSize > 0); |
| compressed.bytesWritten(compressedSize); |
| |
| return compressed; |
| } |
| |
| bool CompressionCodecLZ4::decode(const SharedBuffer& encoded, uint32_t uncompressedSize, |
| SharedBuffer& decoded) { |
| SharedBuffer decompressed = SharedBuffer::allocate(uncompressedSize); |
| |
| int result = LZ4_decompress_fast(encoded.data(), decompressed.mutableData(), uncompressedSize); |
| if (result > 0) { |
| decompressed.bytesWritten(uncompressedSize); |
| decoded = decompressed; |
| return true; |
| } else { |
| // Decompression failed |
| return false; |
| } |
| } |
| |
| } |