#huffman #huffman-coding #compression #decompression

app huff_rs

Encode and decode files with Huffman coding

3 releases

0.1.3 Mar 2, 2021
0.1.2 Mar 1, 2021
0.1.1 Mar 1, 2021
0.1.0 Mar 1, 2021

#82 in Compression

21 downloads per month

MIT license

15KB
313 lines

huff_rs

Crates.io GitHub last commit License

This program was created as a fun project of mine after having to implement Huffman coding for a university project. It utilizes the bitvec crate to create the bitsequences. The performance of this program is honestly pretty bad, I have yet to do further analysis on that. The file format for the compressed files is something I came up with, so afaik it doesn't conform to any standard (if there even is one).

Help

huff_rs 1.0
Thomas Lindae <thomas.lindae@in.tum.de>
Compresses files with huffman encoding

USAGE:
    huff_rs <SUBCOMMAND>

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

SUBCOMMANDS:
    decode    Decodes the specified file
    encode    Encodes the specified file
    help      Prints this message or the help of the given subcommand(s)

Installation

It's best to use cargo to install huff_rs:

cargo install huff_rs

Building

To build huff_rs:

git clone https://github.com/Treeniks/huff_rs
cd huff_rs
cargo build --release
./target/release/huff_rs --version

Usage

Encode

To encode a file:

huff_rs encode file.txt

The default output filename will be the same as the input with the extension replaced by .huff.
You can also specify the output filename with -o:

huff_rs encode file.txt -o compressed.huff

Decode

To decode a file:

huff_rs decode file.huff

The default output filename will be the same as the input with the extension replaced by .txt.
You can also specify the output filename with -o:

huff_rs decode file.huff -o original.txt

TODO

There is 2 main things that this project still needs:

  1. adding checks for correct file format in decode
    Currently the program doesn't check for the correct file format. As such, if you give it the wrong file format, it will either give a random error or panic.
  2. better testing
    I have not implemented proper testing yet, only one small test for a single string.

Dependencies

~3MB
~59K SLoC