mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-18 04:12:19 +00:00
100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
#include "CompressionCodecLZ4.h"
|
|
|
|
#include <lz4.h>
|
|
#include <lz4hc.h>
|
|
#include <Compression/CompressionInfo.h>
|
|
#include <Compression/CompressionFactory.h>
|
|
#include <Compression/LZ4_decompress_faster.h>
|
|
#include <Parsers/IAST.h>
|
|
#include <Parsers/ASTLiteral.h>
|
|
#include <IO/WriteHelpers.h>
|
|
|
|
#pragma GCC diagnostic ignored "-Wold-style-cast"
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int CANNOT_COMPRESS;
|
|
extern const int ILLEGAL_SYNTAX_FOR_CODEC_TYPE;
|
|
}
|
|
|
|
|
|
uint8_t CompressionCodecLZ4::getMethodByte() const
|
|
{
|
|
return static_cast<uint8_t>(CompressionMethodByte::LZ4);
|
|
}
|
|
|
|
String CompressionCodecLZ4::getCodecDesc() const
|
|
{
|
|
return "LZ4";
|
|
}
|
|
|
|
UInt32 CompressionCodecLZ4::getMaxCompressedDataSize(UInt32 uncompressed_size) const
|
|
{
|
|
return LZ4_COMPRESSBOUND(uncompressed_size);
|
|
}
|
|
|
|
UInt32 CompressionCodecLZ4::doCompressData(const char * source, UInt32 source_size, char * dest) const
|
|
{
|
|
return LZ4_compress_default(source, dest, source_size, LZ4_COMPRESSBOUND(source_size));
|
|
}
|
|
|
|
void CompressionCodecLZ4::doDecompressData(const char * source, UInt32 source_size, char * dest, UInt32 uncompressed_size) const
|
|
{
|
|
LZ4::decompress(source, dest, source_size, uncompressed_size, lz4_stat);
|
|
}
|
|
|
|
void registerCodecLZ4(CompressionCodecFactory & factory)
|
|
{
|
|
factory.registerSimpleCompressionCodec("LZ4", static_cast<UInt8>(CompressionMethodByte::LZ4), [&] ()
|
|
{
|
|
return std::make_shared<CompressionCodecLZ4>();
|
|
});
|
|
}
|
|
|
|
|
|
String CompressionCodecLZ4HC::getCodecDesc() const
|
|
{
|
|
return "LZ4HC(" + toString(level) + ")";
|
|
}
|
|
|
|
UInt32 CompressionCodecLZ4HC::doCompressData(const char * source, UInt32 source_size, char * dest) const
|
|
{
|
|
auto success = LZ4_compress_HC(source, dest, source_size, LZ4_COMPRESSBOUND(source_size), level);
|
|
|
|
if (!success)
|
|
throw Exception("Cannot LZ4_compress_HC", ErrorCodes::CANNOT_COMPRESS);
|
|
|
|
return success;
|
|
}
|
|
|
|
void registerCodecLZ4HC(CompressionCodecFactory & factory)
|
|
{
|
|
factory.registerCompressionCodec("LZ4HC", {}, [&](const ASTPtr & arguments) -> CompressionCodecPtr
|
|
{
|
|
int level = 0;
|
|
|
|
if (arguments && !arguments->children.empty())
|
|
{
|
|
if (arguments->children.size() > 1)
|
|
throw Exception("LZ4HC codec must have 1 parameter, given " + std::to_string(arguments->children.size()), ErrorCodes::ILLEGAL_SYNTAX_FOR_CODEC_TYPE);
|
|
|
|
const auto children = arguments->children;
|
|
const auto * literal = children[0]->as<ASTLiteral>();
|
|
level = literal->value.safeGet<UInt64>();
|
|
}
|
|
|
|
return std::make_shared<CompressionCodecLZ4HC>(level);
|
|
});
|
|
}
|
|
|
|
CompressionCodecLZ4HC::CompressionCodecLZ4HC(int level_)
|
|
: level(level_)
|
|
{
|
|
}
|
|
|
|
}
|