| /** |
| * 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. |
| */ |
| #include "CompressionCodecZLib.h" |
| |
| #include <zlib.h> |
| #include <cstring> |
| #include <cstdlib> |
| #include <cmath> |
| #include "LogUtils.h" |
| |
| DECLARE_LOG_OBJECT() |
| |
| namespace pulsar { |
| |
| SharedBuffer CompressionCodecZLib::encode(const SharedBuffer& raw) { |
| // Get the max size of the compressed data and allocate a buffer to hold it |
| int maxCompressedSize = compressBound(raw.readableBytes()); |
| SharedBuffer compressed = SharedBuffer::allocate(maxCompressedSize); |
| |
| unsigned long bytesWritten = maxCompressedSize; |
| int res = compress((Bytef*)compressed.mutableData(), &bytesWritten, (const Bytef*)raw.data(), |
| raw.readableBytes()); |
| if (res != Z_OK) { |
| LOG_ERROR("Failed to compress buffer. res=" << res); |
| abort(); |
| } |
| |
| compressed.bytesWritten(bytesWritten); |
| return compressed; |
| } |
| |
| bool CompressionCodecZLib::decode(const SharedBuffer& encoded, uint32_t uncompressedSize, |
| SharedBuffer& decoded) { |
| SharedBuffer decompressed = SharedBuffer::allocate(uncompressedSize); |
| |
| unsigned long bytesUncompressed = uncompressedSize; |
| int res = uncompress((Bytef*)decompressed.mutableData(), &bytesUncompressed, (Bytef*)encoded.data(), |
| encoded.readableBytes()); |
| |
| decompressed.bytesWritten(bytesUncompressed); |
| if (res == Z_OK) { |
| decoded = decompressed; |
| return true; |
| } else { |
| return false; |
| } |
| } |
| } // namespace pulsar |