mirror of
https://github.com/SerenityOS/serenity
synced 2024-07-22 02:26:11 +00:00
739e657ad0
This has the side-effect of making the algorithm name case-sensitive, but there doesn't seem to be an especially good reason to support that. On the other hand, converting an AK::String to lowercase would require linking LibUnicode.
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/String.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <LibCrypto/Checksum/Adler32.h>
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#include <LibCrypto/Checksum/CRC32.h>
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#include <LibMain/Main.h>
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#include <string.h>
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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Vector<StringView> paths;
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StringView opt_algorithm;
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Core::ArgsParser args_parser;
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args_parser.add_option(opt_algorithm, "Checksum algorithm (default 'crc32', use 'list' to list available algorithms)", "algorithm", '\0', nullptr);
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args_parser.add_positional_argument(paths, "File", "file", Core::ArgsParser::Required::No);
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args_parser.parse(arguments);
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auto algorithm = opt_algorithm.is_empty() ? "crc32"sv : opt_algorithm;
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auto available_algorithms = Vector<StringView> { "crc32"sv, "adler32"sv };
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if (algorithm == "list") {
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outln("Available algorithms:");
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for (auto& available_algorithm : available_algorithms) {
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outln(available_algorithm);
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}
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exit(0);
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}
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if (!available_algorithms.contains_slow(algorithm)) {
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warnln("{}: Unknown checksum algorithm: {}", arguments.strings[0], algorithm);
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exit(1);
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}
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if (paths.is_empty())
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paths.append("-"sv);
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bool fail = false;
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Array<u8, PAGE_SIZE> buffer;
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for (auto& path : paths) {
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auto file_or_error = Core::File::open_file_or_standard_stream(path, Core::File::OpenMode::Read);
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auto filepath = (path == "-"sv) ? "/dev/stdin"sv : path;
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if (file_or_error.is_error()) {
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warnln("{}: {}: {}", arguments.strings[0], filepath, file_or_error.error());
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fail = true;
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continue;
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}
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auto file = file_or_error.release_value();
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size_t file_size = 0;
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if (algorithm == "crc32"sv) {
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Crypto::Checksum::CRC32 crc32;
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while (!file->is_eof()) {
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auto data_or_error = file->read_some(buffer);
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if (data_or_error.is_error()) {
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warnln("{}: Failed to read {}: {}", arguments.strings[0], filepath, data_or_error.error());
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fail = true;
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continue;
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}
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file_size += data_or_error.value().size();
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crc32.update(data_or_error.value());
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}
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outln("{:08x} {} {}", crc32.digest(), file_size, path);
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} else if (algorithm == "adler32"sv) {
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Crypto::Checksum::Adler32 adler32;
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while (!file->is_eof()) {
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auto data_or_error = file->read_some(buffer);
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if (data_or_error.is_error()) {
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warnln("{}: Failed to read {}: {}", arguments.strings[0], filepath, data_or_error.error());
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fail = true;
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continue;
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}
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file_size += data_or_error.value().size();
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adler32.update(data_or_error.value());
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}
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outln("{:08x} {} {}", adler32.digest(), file_size, path);
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} else {
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warnln("{}: Unknown checksum algorithm: {}", arguments.strings[0], algorithm);
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exit(1);
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}
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}
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return fail;
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}
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