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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| /* | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * 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 "velox/common/compression/SnappyCompression.h" | ||
| #include "velox/common/base/Exceptions.h" | ||
|
|
||
| namespace facebook::velox::common { | ||
|
|
||
| uint64_t SnappyCodec::maxCompressedLength(uint64_t inputLength) { | ||
| DCHECK_GE(inputLength, 0); | ||
| return static_cast<uint64_t>( | ||
| snappy::MaxCompressedLength(static_cast<size_t>(inputLength))); | ||
| } | ||
|
|
||
| Expected<uint64_t> SnappyCodec::compress( | ||
| const uint8_t* input, | ||
| uint64_t inputLength, | ||
| uint8_t* output, | ||
| uint64_t outputLength) { | ||
| size_t output_size; | ||
| snappy::RawCompress( | ||
| reinterpret_cast<const char*>(input), | ||
| static_cast<size_t>(inputLength), | ||
| reinterpret_cast<char*>(output), | ||
| &output_size); | ||
| return static_cast<uint64_t>(output_size); | ||
| } | ||
|
|
||
| Expected<uint64_t> SnappyCodec::decompress( | ||
| const uint8_t* input, | ||
| uint64_t inputLength, | ||
| uint8_t* output, | ||
| uint64_t outputLength) { | ||
| size_t decompressedSize; | ||
| VELOX_RETURN_UNEXPECTED_IF( | ||
| !snappy::GetUncompressedLength( | ||
| reinterpret_cast<const char*>(input), | ||
| static_cast<size_t>(inputLength), | ||
| &decompressedSize), | ||
| Status::IOError("Corrupt snappy compressed data.")); | ||
| VELOX_RETURN_UNEXPECTED_IF( | ||
| outputLength < decompressedSize, | ||
| Status::IOError("Output length is too small")); | ||
| VELOX_RETURN_UNEXPECTED_IF( | ||
| !snappy::RawUncompress( | ||
| reinterpret_cast<const char*>(input), | ||
| static_cast<size_t>(inputLength), | ||
| reinterpret_cast<char*>(output)), | ||
| Status::IOError("Corrupt snappy compressed data.")); | ||
| return static_cast<uint64_t>(decompressedSize); | ||
| } | ||
|
|
||
| Expected<std::shared_ptr<StreamingCompressor>> | ||
| SnappyCodec::makeStreamingCompressor() { | ||
| return folly::makeUnexpected( | ||
| Status::NotImplemented("Streaming compression unsupported with Snappy")); | ||
| } | ||
|
|
||
| Expected<std::shared_ptr<StreamingDecompressor>> | ||
| SnappyCodec::makeStreamingDecompressor() { | ||
| return folly::makeUnexpected(Status::NotImplemented( | ||
| "Streaming decompression unsupported with Snappy")); | ||
| } | ||
|
|
||
| CompressionKind SnappyCodec::compressionKind() const { | ||
| return CompressionKind_SNAPPY; | ||
| } | ||
|
|
||
| int32_t SnappyCodec::minimumCompressionLevel() const { | ||
| return kUseDefaultCompressionLevel; | ||
| } | ||
|
|
||
| int32_t SnappyCodec::maximumCompressionLevel() const { | ||
| return kUseDefaultCompressionLevel; | ||
| } | ||
|
|
||
| int32_t SnappyCodec::defaultCompressionLevel() const { | ||
| return kUseDefaultCompressionLevel; | ||
| } | ||
|
|
||
| std::optional<uint64_t> SnappyCodec::getUncompressedLength( | ||
| const uint8_t* input, | ||
| uint64_t inputLength) const { | ||
| size_t decompressedSize; | ||
| if (!snappy::GetUncompressedLength( | ||
| reinterpret_cast<const char*>(input), | ||
| static_cast<size_t>(inputLength), | ||
| &decompressedSize)) { | ||
| return std::nullopt; | ||
| } | ||
| return static_cast<uint64_t>(decompressedSize); | ||
| } | ||
|
|
||
| std::unique_ptr<Codec> makeSnappyCodec() { | ||
| return std::make_unique<SnappyCodec>(); | ||
| } | ||
| } // namespace facebook::velox::common |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| /* | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
||
| // Derived from Apache Arrow. | ||
|
|
||
| #include <snappy.h> | ||
| #include <cstddef> | ||
| #include <cstdint> | ||
| #include <memory> | ||
| #include "velox/common/compression/Compression.h" | ||
|
|
||
| namespace facebook::velox::common { | ||
|
|
||
| class SnappyCodec : public Codec { | ||
| public: | ||
| uint64_t maxCompressedLength(uint64_t inputLength) override; | ||
|
|
||
| Expected<uint64_t> compress( | ||
| const uint8_t* input, | ||
| uint64_t inputLength, | ||
| uint8_t* output, | ||
| uint64_t outputLength) override; | ||
|
|
||
| Expected<uint64_t> decompress( | ||
| const uint8_t* input, | ||
| uint64_t inputLength, | ||
| uint8_t* output, | ||
| uint64_t outputLength) override; | ||
|
|
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| Expected<std::shared_ptr<StreamingCompressor>> makeStreamingCompressor() | ||
| override; | ||
|
|
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| Expected<std::shared_ptr<StreamingDecompressor>> makeStreamingDecompressor() | ||
| override; | ||
|
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| CompressionKind compressionKind() const override; | ||
|
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| int32_t minimumCompressionLevel() const override; | ||
|
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| int32_t maximumCompressionLevel() const override; | ||
|
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| int32_t defaultCompressionLevel() const override; | ||
|
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| std::optional<uint64_t> getUncompressedLength( | ||
| const uint8_t* input, | ||
| uint64_t inputLength) const override; | ||
| }; | ||
|
|
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| std::unique_ptr<Codec> makeSnappyCodec(); | ||
|
|
||
| } // namespace facebook::velox::common |
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