1 // Copyright 2017 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef _BSDIFF_BSDIFF_ARGUMENTS_H_ 6 #define _BSDIFF_BSDIFF_ARGUMENTS_H_ 7 8 #include <stdint.h> 9 10 #include <string> 11 12 #include "bsdiff/constants.h" 13 #include "bsdiff/patch_writer_interface.h" 14 15 namespace bsdiff { 16 17 // Class to store the patch writer options about format, type and quality. 18 class BsdiffArguments { 19 public: 20 BsdiffArguments() 21 : format_(BsdiffFormat::kLegacy), 22 compressor_type_(CompressorType::kBZ2), 23 compression_quality_(-1) {} 24 25 BsdiffArguments(BsdiffFormat format, CompressorType type, int quality) 26 : format_(format), 27 compressor_type_(type), 28 compression_quality_(quality) {} 29 30 // Check if the compressor type is compatible with the bsdiff format. 31 bool IsValid() const; 32 33 // Getter functions. 34 BsdiffFormat format() const { return format_; } 35 36 int min_length() const { return min_length_; } 37 38 CompressorType compressor_type() const { return compressor_type_; } 39 40 int compression_quality() const { return compression_quality_; } 41 42 // Parse the command line arguments of the main function and set all the 43 // fields accordingly. 44 bool ParseCommandLine(int argc, char** argv); 45 46 // Parse the compression type from string. 47 static bool ParseCompressorType(const std::string& str, CompressorType* type); 48 49 // Parse the minimum length parameter from string. 50 static bool ParseMinLength(const std::string& str, size_t* len); 51 52 // Parse the bsdiff format from string. 53 static bool ParseBsdiffFormat(const std::string& str, BsdiffFormat* format); 54 55 // Parse the compression quality (for brotli) from string. 56 static bool ParseQuality(const std::string& str, int* quality); 57 58 private: 59 // Current format supported are the legacy "BSDIFF40" or "BSDF2". 60 BsdiffFormat format_; 61 62 // The algorithm to compress the patch, i.e. BZ2 or Brotli. 63 CompressorType compressor_type_; 64 65 // The quality of compression, only valid when using brotli as the 66 // compression algorithm. 67 int compression_quality_; 68 69 size_t min_length_{0}; 70 }; 71 72 } // namespace bsdiff 73 74 #endif // _BSDIFF_BSDIFF_ARGUMENTS_H_ 75
