73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
|
|
* CompressionUtils.h
|
|
*
|
|
* This source file is part of the FoundationDB open source project
|
|
*
|
|
* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef FLOW_COMPRESSION_UTILS_H
|
|
#define FLOW_COMPRESSION_UTILS_H
|
|
#pragma once
|
|
|
|
#include "flow/Arena.h"
|
|
|
|
#include <unordered_set>
|
|
|
|
enum class CompressionFilter {
|
|
NONE,
|
|
ZSTD,
|
|
LAST // Always the last member
|
|
};
|
|
|
|
struct CompressionUtils {
|
|
static StringRef compress(const CompressionFilter filter, const StringRef& data, Arena& arena);
|
|
static StringRef compress(const CompressionFilter filter, const StringRef& data, int level, Arena& arena);
|
|
static StringRef decompress(const CompressionFilter filter, const StringRef& data, Arena& arena);
|
|
|
|
static int getDefaultCompressionLevel(CompressionFilter filter);
|
|
static CompressionFilter getRandomFilter();
|
|
|
|
static CompressionFilter fromFilterString(const std::string& filter) {
|
|
if (filter == "NONE") {
|
|
return CompressionFilter::NONE;
|
|
} else if (filter == "ZSTD") {
|
|
return CompressionFilter::ZSTD;
|
|
} else {
|
|
throw not_implemented();
|
|
}
|
|
}
|
|
|
|
static std::string toString(const CompressionFilter filter) {
|
|
if (filter == CompressionFilter::NONE) {
|
|
return "NONE";
|
|
} else if (filter == CompressionFilter::ZSTD) {
|
|
return "ZSTD";
|
|
} else {
|
|
throw not_implemented();
|
|
}
|
|
}
|
|
|
|
static void checkFilterSupported(const CompressionFilter filter) {
|
|
if (CompressionUtils::supportedFilters.find(filter) == CompressionUtils::supportedFilters.end()) {
|
|
throw not_implemented();
|
|
}
|
|
}
|
|
|
|
static std::unordered_set<CompressionFilter> supportedFilters;
|
|
};
|
|
|
|
#endif // FLOW_COMPRRESSION_UTILS_H
|