banzai is a pure Rust bzip2 encoder. It is currently pre-alpha software.
banzai <file_to_encode>
Compresses and writes to file_to_encode.bz2.
rust
fn encode(input: I, writer: io::BufWriter<W>, level: usize) -> io::Result<()>
where
I: convert::AsRef<[u8]>,
W: io::Write
Call encode with a reference to an input buffer and a BufWriter. The final parameter is level, which is a number between 1 and 9 inclusive, which corresponds to the block size (block size is level * 100_000 bytes). The typical default is 9.
This is original libre software. However, implementation guidance was derived from several free-software sources.
The suffix array construction algorithm used in banzai is SA-IS, which was developed by Ge Nong, Sen Zhang, and Wai Hong Chan. Guidance for implementing SA-IS was derived from Yuta Mori's sais and burntsushi's suffix.
The implementation of Huffman coding used in banzai takes heavy inspiration from the reference implementation of bzip2, originally authored by Julian Seward, currently maintained by Micah Snyder.
Finally, the unofficial bzip2 Format Specification written by Joe Tsai was extremely helpful when it came to the specifics of the bzip2 binary format.