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34 lines
850 B
C++
34 lines
850 B
C++
#pragma once
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#include <Compression/ICompressionCodec.h>
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namespace DB
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{
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class CompressionCodecDelta : public ICompressionCodec
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{
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public:
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CompressionCodecDelta(UInt8 delta_bytes_size_);
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uint8_t getMethodByte() const override;
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String getCodecDesc() const override;
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void useInfoAboutType(DataTypePtr data_type) override;
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protected:
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UInt32 doCompressData(const char * source, UInt32 source_size, char * dest) const override;
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void doDecompressData(const char * source, UInt32 source_size, char * dest, UInt32 uncompressed_size) const override;
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UInt32 getMaxCompressedDataSize(UInt32 uncompressed_size) const override { return uncompressed_size + 2; }
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bool isCompression() const override { return false; }
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bool isGenericCompression() const override { return false; }
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private:
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UInt8 delta_bytes_size;
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};
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}
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