| /** |
| * 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 "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; |
| } |
| } |
| |
| } |