| /** |
| * 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 "CompressionCodecZstd.h" |
| |
| #if HAS_ZSTD |
| #include <zstd.h> |
| |
| namespace pulsar { |
| |
| static const int COMPRESSION_LEVEL = 3; |
| |
| SharedBuffer CompressionCodecZstd::encode(const SharedBuffer& raw) { |
| // Get the max size of the compressed data and allocate a buffer to hold it |
| size_t maxCompressedSize = ZSTD_compressBound(raw.readableBytes()); |
| SharedBuffer compressed = SharedBuffer::allocate(maxCompressedSize); |
| |
| int compressedSize = ZSTD_compress(compressed.mutableData(), maxCompressedSize, raw.data(), |
| raw.readableBytes(), COMPRESSION_LEVEL); |
| compressed.bytesWritten(compressedSize); |
| |
| return compressed; |
| } |
| |
| bool CompressionCodecZstd::decode(const SharedBuffer& encoded, uint32_t uncompressedSize, |
| SharedBuffer& decoded) { |
| SharedBuffer decompressed = SharedBuffer::allocate(uncompressedSize); |
| |
| size_t result = ZSTD_decompress(decompressed.mutableData(), uncompressedSize, encoded.data(), |
| encoded.readableBytes()); |
| if (result == uncompressedSize) { |
| decompressed.bytesWritten(uncompressedSize); |
| decoded = decompressed; |
| return true; |
| } else { |
| // Decompression failed |
| return false; |
| } |
| } |
| } // namespace pulsar |
| |
| #else // No ZSTD |
| |
| #include <stdexcept> |
| |
| namespace pulsar { |
| |
| SharedBuffer CompressionCodecZstd::encode(const SharedBuffer& raw) { |
| throw std::runtime_error("ZStd compression not supported"); |
| } |
| |
| bool CompressionCodecZstd::decode(const SharedBuffer& encoded, uint32_t uncompressedSize, |
| SharedBuffer& decoded) { |
| throw std::runtime_error("ZStd compression not supported"); |
| } |
| } // namespace pulsar |
| |
| #endif // HAS_ZSTD |