Capplication is an archiver which is capable of compressing both text and binary files such as .bmp, .png, .mp3 and other files. It utilizes a recurring algorithm in order to achieve maximum level of compression. It chooses between RLE and Huffman archivation to achieve less size.
The unique extension and corresponding signature is used for this application: .seven; the signature is CAFE FADE in the hexadecimal code. Its structure is described below:
| Size | Function |
|---|---|
| 4 bytes | signature |
| 4 bytes | total file size |
| 1 byte | algorithm of encoding & decoding (0 is RLE; 1 is Huffman) |
| 1 byte | inumber of iterations necessary to be conducted to decode original file |
| 1 byte | number bits at the end of the file that need to be skipped (Only huffman) |
| 4 bytes | size of huffman-encoding dictionary in bytes (Only huffman) |
| - bytes | content |
Decoded file has recoveried extension if the original one was .txt, .bmp, .jpg, .png, .mp3, .mp4, .docx, .exe or .doc
Program provides users with basic user interface: a button to search for target file; two labels to display input path and output path; and a button to commit packaging/unpackaging.