https://github.com/corruptedspring/spaceglider

Compression Tool
https://github.com/corruptedspring/spaceglider

compress compression compression-algorithm data-compression data-compression-algorithms java loseless-compression

Last synced: 10 days ago
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Compression Tool

• Host: GitHub
• URL: https://github.com/corruptedspring/spaceglider
• Owner: CorruptedSpring
• Created: 2024-12-18T10:26:04.000Z (16 days ago)
• Default Branch: main
• Last Pushed: 2024-12-23T20:56:57.000Z (10 days ago)
• Last Synced: 2024-12-23T21:25:25.473Z (10 days ago)
• Topics: compress, compression, compression-algorithm, data-compression, data-compression-algorithms, java, loseless-compression
• Language: Java
• Homepage:
• Size: 17.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: ReadME.md

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README

        
# SpaceGlider

SpaceGlider is a file compression and decompression tool designed for text files. It uses a custom dictionary-based approach to compress files efficiently

#

Tested on [enwik9](http://mattmahoney.net/dc/enwik9.zip) with a compression rate of 42.56% (size includes dictionnary generated).

#

## Features

- Compresses text files using a word dictionary.

- Orders dictionary entries by frequency.

- Rewrites files with binary replacements for words.

## Usage

1. **Run the program:**

   ```

   java Main

   ```

2. **Enter the file path to compress when prompted.**

3. **The program will generate the following files:**

   - `_dict.dict`: The word dictionary.

   - `_dict.dictsrt`: The sorted word dictionary.

   - `compressedfile`: The compressed file.

   - `decompressedfile`: The decompressed file.

## Limitations

- Made for files containing 270,549,120 words or less.

## Main Functions

### `createWordDictionary`

Creates a word dictionary from the input file, counting the frequency of each word.

### `orderLinesByValue`

Orders the dictionary entries by their frequency in descending order.

### `rewriteFileWithBinaryReplacement`

Rewrites the input file using binary replacements for words based on the dictionary.

### `revertCompressedFile`

Reverts the compressed file back to its original form using the dictionary.