ClickHouse/src/Compression/CompressionCodecNone.cpp
alesapin 10c7a6c45e
Add ability to specify Default codec for columns (#14049)
* Add ability to specify DefaultCompression codec which correspond to settings specified in config.xml

* Fix style

* Rename DefaultCompression to simple Default

* Fix compression codec

* Better codec description representation

* Less strange code and one method

* Fix delta
2020-08-28 20:40:45 +03:00

40 lines
1008 B
C++

#include <Compression/CompressionCodecNone.h>
#include <Compression/CompressionInfo.h>
#include <Compression/CompressionFactory.h>
#include <Parsers/ASTIdentifier.h>
namespace DB
{
uint8_t CompressionCodecNone::getMethodByte() const
{
return static_cast<uint8_t>(CompressionMethodByte::NONE);
}
ASTPtr CompressionCodecNone::getCodecDesc() const
{
return std::make_shared<ASTIdentifier>("NONE");
}
UInt32 CompressionCodecNone::doCompressData(const char * source, UInt32 source_size, char * dest) const
{
memcpy(dest, source, source_size);
return source_size;
}
void CompressionCodecNone::doDecompressData(const char * source, UInt32 /*source_size*/, char * dest, UInt32 uncompressed_size) const
{
memcpy(dest, source, uncompressed_size);
}
void registerCodecNone(CompressionCodecFactory & factory)
{
factory.registerSimpleCompressionCodec("NONE", static_cast<char>(CompressionMethodByte::NONE), [&] ()
{
return std::make_shared<CompressionCodecNone>();
});
}
}