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- /*
- * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <LibCompress/Gzip.h>
- #include <LibCore/ArgsParser.h>
- #include <LibCore/FileStream.h>
- #include <LibCore/MappedFile.h>
- #include <LibCore/System.h>
- #include <LibMain/Main.h>
- #include <unistd.h>
- ErrorOr<int> serenity_main(Main::Arguments arguments)
- {
- Vector<StringView> filenames;
- bool keep_input_files { false };
- bool write_to_stdout { false };
- bool decompress { false };
- Core::ArgsParser args_parser;
- args_parser.add_option(keep_input_files, "Keep (don't delete) input files", "keep", 'k');
- args_parser.add_option(write_to_stdout, "Write to stdout, keep original files unchanged", "stdout", 'c');
- args_parser.add_option(decompress, "Decompress", "decompress", 'd');
- args_parser.add_positional_argument(filenames, "Files", "FILES");
- args_parser.parse(arguments);
- if (write_to_stdout)
- keep_input_files = true;
- for (auto const& input_filename : filenames) {
- DeprecatedString output_filename;
- if (decompress) {
- if (!input_filename.ends_with(".gz"sv)) {
- warnln("unknown suffix for: {}, skipping", input_filename);
- continue;
- }
- output_filename = input_filename.substring_view(0, input_filename.length() - ".gz"sv.length());
- } else {
- output_filename = DeprecatedString::formatted("{}.gz", input_filename);
- }
- // We map the whole file instead of streaming to reduce size overhead (gzip header) and increase the deflate block size (better compression)
- // TODO: automatically fallback to buffered streaming for very large files
- RefPtr<Core::MappedFile> file;
- ReadonlyBytes input_bytes;
- if (TRY(Core::System::stat(input_filename)).st_size > 0) {
- file = TRY(Core::MappedFile::map(input_filename));
- input_bytes = file->bytes();
- }
- AK::Optional<ByteBuffer> output_bytes;
- if (decompress)
- output_bytes = TRY(Compress::GzipDecompressor::decompress_all(input_bytes));
- else
- output_bytes = Compress::GzipCompressor::compress_all(input_bytes);
- if (!output_bytes.has_value()) {
- warnln("Failed gzip {} input file", decompress ? "decompressing"sv : "compressing"sv);
- return 1;
- }
- auto success = false;
- if (write_to_stdout) {
- auto stdout = Core::OutputFileStream { Core::File::standard_output() };
- success = stdout.write_or_error(output_bytes.value());
- } else {
- auto output_stream_result = Core::OutputFileStream::open(output_filename);
- if (output_stream_result.is_error()) {
- warnln("Failed opening output file for writing: {}", output_stream_result.error());
- return 1;
- }
- success = output_stream_result.value().write_or_error(output_bytes.value());
- }
- if (!success) {
- warnln("Failed writing to output");
- return 1;
- }
- if (!keep_input_files) {
- TRY(Core::System::unlink(input_filename));
- }
- }
- return 0;
- }
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