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#pragma once
#include "clickhouse_config.h"
#if USE_SNAPPY
#include <IO/BufferWithOwnMemory.h>
#include <IO/WriteBuffer.h>
namespace DB
{
/// Performs compression using snappy library and write compressed data to the underlying buffer.
class SnappyWriteBuffer : public BufferWithOwnMemory<WriteBuffer>
{
public:
explicit SnappyWriteBuffer(
std::unique_ptr<WriteBuffer> out_,
size_t buf_size = DBMS_DEFAULT_BUFFER_SIZE,
char * existing_memory = nullptr,
size_t alignment = 0);
~SnappyWriteBuffer() override;
void finalizeImpl() override { finish(); }
private:
void nextImpl() override;
void finishImpl();
void finish();
std::unique_ptr<WriteBuffer> out;
bool finished = false;
String uncompress_buffer;
String compress_buffer;
};
}
#endif
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