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39369f1da6
There are more places we can use these, I just picked some that felt like they improved the code.
81 lines
2.7 KiB
C++
81 lines
2.7 KiB
C++
/*
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* Copyright (c) 2020, 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 <LibCompress/Gzip.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/FileStream.h>
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#include <unistd.h>
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static bool decompress_file(Buffered<Core::InputFileStream>& input_stream, Buffered<Core::OutputFileStream>& output_stream)
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{
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auto gzip_stream = Compress::GzipDecompressor { input_stream };
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u8 buffer[4096];
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while (!gzip_stream.has_any_error() && !gzip_stream.unreliable_eof()) {
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const auto nread = gzip_stream.read({ buffer, sizeof(buffer) });
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output_stream.write_or_error({ buffer, nread });
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}
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return !gzip_stream.handle_any_error();
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}
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int main(int argc, char** argv)
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{
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Vector<String> filenames;
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bool keep_input_files { false };
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bool write_to_stdout { false };
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Core::ArgsParser args_parser;
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args_parser.add_option(keep_input_files, "Keep (don't delete) input files", "keep", 'k');
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args_parser.add_option(write_to_stdout, "Write to stdout, keep original files unchanged", "stdout", 'c');
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args_parser.add_positional_argument(filenames, "File to decompress", "FILE");
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args_parser.parse(argc, argv);
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if (write_to_stdout)
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keep_input_files = true;
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for (auto filename : filenames) {
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if (!filename.ends_with(".gz"))
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filename = String::formatted("{}.gz", filename);
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const auto input_filename = filename;
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const auto output_filename = filename.substring_view(0, filename.length() - 3);
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auto input_stream_result = Core::InputFileStream::open_buffered(input_filename);
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if (input_stream_result.is_error()) {
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warnln("Failed opening input file for reading: {}", input_stream_result.error());
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return 1;
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}
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auto success = false;
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if (write_to_stdout) {
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auto stdout = Core::OutputFileStream::stdout_buffered();
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success = decompress_file(input_stream_result.value(), stdout);
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} else {
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auto output_stream_result = Core::OutputFileStream::open_buffered(output_filename);
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if (output_stream_result.is_error()) {
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warnln("Failed opening output file for writing: {}", output_stream_result.error());
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return 1;
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}
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success = decompress_file(input_stream_result.value(), output_stream_result.value());
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}
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if (!success) {
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warnln("Failed gzip decompressing input file");
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return 1;
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}
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if (!keep_input_files) {
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const auto retval = unlink(String { input_filename }.characters());
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if (retval != 0) {
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warnln("Failed removing input file");
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return 1;
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}
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}
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}
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return 0;
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}
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