mirror of
https://github.com/expo/bsdiff.git
synced 2026-11-14 08:38:17 -10:00
Tianjie Xu
77833b6477
We modified the patch writer to have the capability to produce the smallest patch if multiple compressors are given. This type is supported for bsdf2 format only. Example usage: bsdiff --format=bsdf2 --type=bz2:brotli <src_file> <tgt_file> <patch_file> Test: diff & patch an apk file Change-Id: Icd4322f21975b82c5ee09f8feb9321f52c9813a4
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
// 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_
|