mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-17 20:02:05 +00:00
33 lines
801 B
C++
33 lines
801 B
C++
#pragma once
|
|
|
|
#include <Compression/ICompressionCodec.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
class CompressionCodecDelta : public ICompressionCodec
|
|
{
|
|
public:
|
|
CompressionCodecDelta(UInt8 delta_bytes_size_);
|
|
|
|
uint8_t getMethodByte() const override;
|
|
|
|
void updateHash(SipHash & hash) const override;
|
|
|
|
protected:
|
|
|
|
UInt32 doCompressData(const char * source, UInt32 source_size, char * dest) const override;
|
|
|
|
void doDecompressData(const char * source, UInt32 source_size, char * dest, UInt32 uncompressed_size) const override;
|
|
|
|
UInt32 getMaxCompressedDataSize(UInt32 uncompressed_size) const override { return uncompressed_size + 2; }
|
|
|
|
bool isCompression() const override { return false; }
|
|
bool isGenericCompression() const override { return false; }
|
|
|
|
private:
|
|
UInt8 delta_bytes_size;
|
|
};
|
|
|
|
}
|