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85 lines
2.5 KiB
85 lines
2.5 KiB
// Copyright 2017 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef _BSDIFF_BSDIFF_ARGUMENTS_H_
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#define _BSDIFF_BSDIFF_ARGUMENTS_H_
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#include <stdint.h>
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#include <set>
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#include <string>
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#include <vector>
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#include "bsdiff/constants.h"
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#include "bsdiff/patch_writer_interface.h"
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namespace bsdiff {
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// Class to store the patch writer options about format, type and
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// brotli_quality.
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class BsdiffArguments {
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public:
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BsdiffArguments() : format_(BsdiffFormat::kLegacy), brotli_quality_(-1) {
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compressor_types_.emplace(CompressorType::kBZ2);
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}
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BsdiffArguments(BsdiffFormat format,
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std::set<CompressorType> types,
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int brotli_quality)
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: format_(format),
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compressor_types_(std::move(types)),
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brotli_quality_(brotli_quality) {}
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// Check if the compressor type is compatible with the bsdiff format.
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bool IsValid() const;
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// Getter functions.
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BsdiffFormat format() const { return format_; }
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int min_length() const { return min_length_; }
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std::vector<CompressorType> compressor_types() const;
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int brotli_quality() const { return brotli_quality_; }
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// Parse the command line arguments of the main function and set all the
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// fields accordingly.
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bool ParseCommandLine(int argc, char** argv);
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// Parse the compression type from string.
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static bool ParseCompressorTypes(const std::string& str,
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std::set<CompressorType>* types);
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// Parse the minimum length parameter from string.
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static bool ParseMinLength(const std::string& str, size_t* len);
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// Parse the bsdiff format from string.
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static bool ParseBsdiffFormat(const std::string& str, BsdiffFormat* format);
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// Parse the compression quality (for brotli) from string; also check if the
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// value is within the valid range.
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static bool ParseQuality(const std::string& str,
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int* quality,
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int min,
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int max);
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private:
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bool IsCompressorSupported(CompressorType type) const;
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// Current format supported are the legacy "BSDIFF40" or "BSDF2".
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BsdiffFormat format_;
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// The algorithms to compress the patch, e.g. bz2, brotli.
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std::set<CompressorType> compressor_types_;
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// The quality of brotli compressor.
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int brotli_quality_;
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size_t min_length_{0};
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};
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} // namespace bsdiff
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#endif // _BSDIFF_BSDIFF_ARGUMENTS_H_
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