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#include <IO/CompressionMethod.h>
#include <IO/BrotliReadBuffer.h>
#include <IO/BrotliWriteBuffer.h>
#include <IO/LZMADeflatingWriteBuffer.h>
#include <IO/LZMAInflatingReadBuffer.h>
#include <IO/ReadBuffer.h>
#include <IO/WriteBuffer.h>
#include <IO/ZlibDeflatingWriteBuffer.h>
#include <IO/ZlibInflatingReadBuffer.h>
#include <IO/ZstdDeflatingWriteBuffer.h>
#include <IO/ZstdInflatingReadBuffer.h>
#include <IO/Lz4DeflatingWriteBuffer.h>
#include <IO/Lz4InflatingReadBuffer.h>
#include <IO/Bzip2ReadBuffer.h>
#include <IO/Bzip2WriteBuffer.h>
#include <IO/HadoopSnappyReadBuffer.h>
#include "clickhouse_config.h"
#include <boost/algorithm/string/case_conv.hpp>
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
}
std::string toContentEncodingName(CompressionMethod method)
{
switch (method)
{
case CompressionMethod::Gzip:
return "gzip";
case CompressionMethod::Zlib:
return "deflate";
case CompressionMethod::Brotli:
return "br";
case CompressionMethod::Xz:
return "xz";
case CompressionMethod::Zstd:
return "zstd";
case CompressionMethod::Lz4:
return "lz4";
case CompressionMethod::Bzip2:
return "bz2";
case CompressionMethod::Snappy:
return "snappy";
case CompressionMethod::None:
return "";
}
UNREACHABLE();
}
CompressionMethod chooseHTTPCompressionMethod(const std::string & list)
{
/// The compression methods are ordered from most to least preferred.
if (std::string::npos != list.find("zstd"))
return CompressionMethod::Zstd;
else if (std::string::npos != list.find("br"))
return CompressionMethod::Brotli;
else if (std::string::npos != list.find("lz4"))
return CompressionMethod::Lz4;
else if (std::string::npos != list.find("snappy"))
return CompressionMethod::Snappy;
else if (std::string::npos != list.find("gzip"))
return CompressionMethod::Gzip;
else if (std::string::npos != list.find("deflate"))
return CompressionMethod::Zlib;
else if (std::string::npos != list.find("xz"))
return CompressionMethod::Xz;
else if (std::string::npos != list.find("bz2"))
return CompressionMethod::Bzip2;
else
return CompressionMethod::None;
}
CompressionMethod chooseCompressionMethod(const std::string & path, const std::string & hint)
{
std::string file_extension;
if (hint.empty() || hint == "auto")
{
auto pos = path.find_last_of('.');
if (pos != std::string::npos)
file_extension = path.substr(pos + 1, std::string::npos);
}
std::string method_str;
if (file_extension.empty())
method_str = hint;
else
method_str = std::move(file_extension);
boost::algorithm::to_lower(method_str);
if (method_str == "gzip" || method_str == "gz")
return CompressionMethod::Gzip;
if (method_str == "deflate")
return CompressionMethod::Zlib;
if (method_str == "brotli" || method_str == "br")
return CompressionMethod::Brotli;
if (method_str == "lzma" || method_str == "xz")
return CompressionMethod::Xz;
if (method_str == "zstd" || method_str == "zst")
return CompressionMethod::Zstd;
if (method_str == "lz4")
return CompressionMethod::Lz4;
if (method_str == "bz2")
return CompressionMethod::Bzip2;
if (method_str == "snappy")
return CompressionMethod::Snappy;
if (hint.empty() || hint == "auto" || hint == "none")
return CompressionMethod::None;
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Unknown compression method '{}'. "
"Only 'auto', 'none', 'gzip', 'deflate', 'br', 'xz', 'zstd', 'lz4', 'bz2', 'snappy' are supported as compression methods", hint);
}
std::pair<uint64_t, uint64_t> getCompressionLevelRange(const CompressionMethod & method)
{
switch (method)
{
case CompressionMethod::Zstd:
return {1, 22};
case CompressionMethod::Lz4:
return {1, 12};
default:
return {1, 9};
}
}
static std::unique_ptr<CompressedReadBufferWrapper> createCompressedWrapper(
std::unique_ptr<ReadBuffer> nested, CompressionMethod method, size_t buf_size, char * existing_memory, size_t alignment, int zstd_window_log_max)
{
if (method == CompressionMethod::Gzip || method == CompressionMethod::Zlib)
return std::make_unique<ZlibInflatingReadBuffer>(std::move(nested), method, buf_size, existing_memory, alignment);
#if USE_BROTLI
if (method == CompressionMethod::Brotli)
return std::make_unique<BrotliReadBuffer>(std::move(nested), buf_size, existing_memory, alignment);
#endif
if (method == CompressionMethod::Xz)
return std::make_unique<LZMAInflatingReadBuffer>(std::move(nested), buf_size, existing_memory, alignment);
if (method == CompressionMethod::Zstd)
return std::make_unique<ZstdInflatingReadBuffer>(std::move(nested), buf_size, existing_memory, alignment, zstd_window_log_max);
if (method == CompressionMethod::Lz4)
return std::make_unique<Lz4InflatingReadBuffer>(std::move(nested), buf_size, existing_memory, alignment);
#if USE_BZIP2
if (method == CompressionMethod::Bzip2)
return std::make_unique<Bzip2ReadBuffer>(std::move(nested), buf_size, existing_memory, alignment);
#endif
#if USE_SNAPPY
if (method == CompressionMethod::Snappy)
return std::make_unique<HadoopSnappyReadBuffer>(std::move(nested), buf_size, existing_memory, alignment);
#endif
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Unsupported compression method");
}
std::unique_ptr<ReadBuffer> wrapReadBufferWithCompressionMethod(
std::unique_ptr<ReadBuffer> nested, CompressionMethod method, int zstd_window_log_max, size_t buf_size, char * existing_memory, size_t alignment)
{
if (method == CompressionMethod::None)
return nested;
return createCompressedWrapper(std::move(nested), method, buf_size, existing_memory, alignment, zstd_window_log_max);
}
std::unique_ptr<WriteBuffer> wrapWriteBufferWithCompressionMethod(
std::unique_ptr<WriteBuffer> nested, CompressionMethod method, int level, size_t buf_size, char * existing_memory, size_t alignment)
{
if (method == DB::CompressionMethod::Gzip || method == CompressionMethod::Zlib)
return std::make_unique<ZlibDeflatingWriteBuffer>(std::move(nested), method, level, buf_size, existing_memory, alignment);
#if USE_BROTLI
if (method == DB::CompressionMethod::Brotli)
return std::make_unique<BrotliWriteBuffer>(std::move(nested), level, buf_size, existing_memory, alignment);
#endif
if (method == CompressionMethod::Xz)
return std::make_unique<LZMADeflatingWriteBuffer>(std::move(nested), level, buf_size, existing_memory, alignment);
if (method == CompressionMethod::Zstd)
return std::make_unique<ZstdDeflatingWriteBuffer>(std::move(nested), level, buf_size, existing_memory, alignment);
if (method == CompressionMethod::Lz4)
return std::make_unique<Lz4DeflatingWriteBuffer>(std::move(nested), level, buf_size, existing_memory, alignment);
#if USE_BZIP2
if (method == CompressionMethod::Bzip2)
return std::make_unique<Bzip2WriteBuffer>(std::move(nested), level, buf_size, existing_memory, alignment);
#endif
#if USE_SNAPPY
if (method == CompressionMethod::Snappy)
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Unsupported compression method");
#endif
if (method == CompressionMethod::None)
return nested;
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Unsupported compression method");
}
}
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