README.md

Zippy

Zippy is a small file compression utility built purely in Haskell. It provides for two different data compression techniques, namely,

• Huffman Encoding
• Lempel–Ziv–Welch (LZW) Compression Algorithm

This project was built as a partial fullfilment towards CS2433-Principles of Programming Languages II (Spring'18) taught by Dr. Saurabh Joshi at IIT Hyderabad.

Getting Started

Running the application

Open a terminal window.

$ ./zippy <option> <input_file> <output_file>

Command-line Arguments

Zippy requires three command-line arguments : , <input_file> and <output_file>.

• <option> can take the following values:

  • -c-huf for compression using Huffman encoding.
  • -c-lzw for compression using LZW compression algorithm.
  • -d-huf for decompression using Huffman encoding.
  • -d-lzw for decompression using LZW compression algorithm.

• <input_file> is the relative path of the file to be compressed.

• <output_file> is the relative path of the compressed/decompressed file.

Building from source

Zippy requires GHC 8.0.2+ to build source. Clone the repository.

$ cd haskell-13
$ chmod +x build.sh
$ ./build.sh

Authors

• Pawar Abhishek Dwarkanath (cs16btech11027@iith.ac.in)
• Ninad Akolekar (cs16btech11024@iith.ac.in)
• Saahil Sirowa (cs16btech11030@iith.ac.in)