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