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gzip: Use utilities from LibCompress to (de)compress files

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Timothy Flynn 2023-03-31 19:12:04 -04:00 committed by Andreas Kling
parent 7ec91dfde7
commit da6f32e5d8
Notes: sideshowbarker 2024-07-16 22:08:03 +09:00 
Author: https://github.com/trflynn89
Commit: https://github.com/SerenityOS/serenity/commit/da6f32e5d8
Pull-request: https://github.com/SerenityOS/serenity/pull/18122
1 changed files with 6 additions and 16 deletions
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22
Userland/Utilities/gzip.cpp
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@ -41,27 +41,17 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
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();
}
ByteBuffer output_bytes;
if (decompress)
output_bytes = TRY(Compress::GzipDecompressor::decompress_all(input_bytes));
else
output_bytes = TRY(Compress::GzipCompressor::compress_all(input_bytes));
auto output_stream = write_to_stdout ? TRY(Core::File::standard_output()) : TRY(Core::File::open(output_filename, Core::File::OpenMode::Write));
TRY(output_stream->write_until_depleted(output_bytes));
if (decompress)
TRY(Compress::GzipDecompressor::decompress_file(input_filename, move(output_stream)));
else
TRY(Compress::GzipCompressor::compress_file(input_filename, move(output_stream)));
if (!keep_input_files) {
TRY(Core::System::unlink(input_filename));
}
}
return 0;
}