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/*
* Copyright (c) 2021, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/String.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCrypto/Checksum/Adler32.h>
#include <LibCrypto/Checksum/CRC32.h>
#include <LibMain/Main.h>
#include <string.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
Vector<StringView> paths;
StringView opt_algorithm;
Core::ArgsParser args_parser;
args_parser.add_option(opt_algorithm, "Checksum algorithm (default 'crc32', use 'list' to list available algorithms)", "algorithm", '\0', nullptr);
args_parser.add_positional_argument(paths, "File", "file", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
auto algorithm = opt_algorithm.is_empty() ? "crc32"sv : opt_algorithm;
auto available_algorithms = Vector<StringView> { "crc32"sv, "adler32"sv };
if (algorithm == "list") {
outln("Available algorithms:");
for (auto& available_algorithm : available_algorithms) {
outln(available_algorithm);
}
exit(0);
}
if (!available_algorithms.contains_slow(algorithm)) {
warnln("{}: Unknown checksum algorithm: {}", arguments.strings[0], algorithm);
exit(1);
}
if (paths.is_empty())
paths.append("-"sv);
bool fail = false;
Array<u8, PAGE_SIZE> buffer;
for (auto& path : paths) {
auto file_or_error = Core::File::open_file_or_standard_stream(path, Core::File::OpenMode::Read);
auto filepath = (path == "-"sv) ? "/dev/stdin"sv : path;
if (file_or_error.is_error()) {
warnln("{}: {}: {}", arguments.strings[0], filepath, file_or_error.error());
fail = true;
continue;
}
auto file = file_or_error.release_value();
size_t file_size = 0;
if (algorithm == "crc32"sv) {
Crypto::Checksum::CRC32 crc32;
while (!file->is_eof()) {
auto data_or_error = file->read_some(buffer);
if (data_or_error.is_error()) {
warnln("{}: Failed to read {}: {}", arguments.strings[0], filepath, data_or_error.error());
fail = true;
continue;
}
file_size += data_or_error.value().size();
crc32.update(data_or_error.value());
}
outln("{:08x} {} {}", crc32.digest(), file_size, path);
} else if (algorithm == "adler32"sv) {
Crypto::Checksum::Adler32 adler32;
while (!file->is_eof()) {
auto data_or_error = file->read_some(buffer);
if (data_or_error.is_error()) {
warnln("{}: Failed to read {}: {}", arguments.strings[0], filepath, data_or_error.error());
fail = true;
continue;
}
file_size += data_or_error.value().size();
adler32.update(data_or_error.value());
}
outln("{:08x} {} {}", adler32.digest(), file_size, path);
} else {
warnln("{}: Unknown checksum algorithm: {}", arguments.strings[0], algorithm);
exit(1);
}
}
return fail;
}
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