| /** |
| * 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 "CompressionCodecSnappy.h" |
| |
| #if HAS_SNAPPY |
| #include <snappy.h> |
| #include <snappy-sinksource.h> |
| |
| namespace pulsar { |
| |
| SharedBuffer CompressionCodecSnappy::encode(const SharedBuffer& raw) { |
| // Get the max size of the compressed data and allocate a buffer to hold it |
| size_t maxCompressedLength = snappy::MaxCompressedLength(raw.readableBytes()); |
| SharedBuffer compressed = SharedBuffer::allocate(static_cast<const uint32_t>(maxCompressedLength)); |
| snappy::ByteArraySource source(raw.data(), raw.readableBytes()); |
| snappy::UncheckedByteArraySink sink(compressed.mutableData()); |
| size_t compressedSize = snappy::Compress(&source, &sink); |
| compressed.setWriterIndex(static_cast<uint32_t>(compressedSize)); |
| return compressed; |
| } |
| |
| bool CompressionCodecSnappy::decode(const SharedBuffer& encoded, uint32_t uncompressedSize, |
| SharedBuffer& decoded) { |
| SharedBuffer uncompressed = SharedBuffer::allocate(uncompressedSize); |
| snappy::ByteArraySource source(encoded.data(), encoded.readableBytes()); |
| snappy::UncheckedByteArraySink sink(uncompressed.mutableData()); |
| if (snappy::Uncompress(&source, &sink)) { |
| decoded = uncompressed; |
| decoded.setWriterIndex(uncompressedSize); |
| return true; |
| } else { |
| // Decompression failed |
| return false; |
| } |
| } |
| } // namespace pulsar |
| |
| #else // No SNAPPY |
| |
| #include <stdexcept> |
| |
| namespace pulsar { |
| |
| SharedBuffer CompressionCodecSnappy::encode(const SharedBuffer& raw) { |
| throw std::runtime_error("Snappy compression not supported"); |
| } |
| |
| bool CompressionCodecSnappy::decode(const SharedBuffer& encoded, uint32_t uncompressedSize, |
| SharedBuffer& decoded) { |
| throw std::runtime_error("Snappy compression not supported"); |
| } |
| } // namespace pulsar |
| |
| #endif // HAS_SNAPPY |