https://github.com/naqvis/snappy

Snappy compression format reader/writer for Crystal
https://github.com/naqvis/snappy

compression-format crystal crystal-lang crystal-language snappy

Last synced: about 1 month ago
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Snappy compression format reader/writer for Crystal

• Host: GitHub
• URL: https://github.com/naqvis/snappy
• Owner: naqvis
• License: mit
• Created: 2019-09-23T13:10:50.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2021-03-25T06:36:12.000Z (over 3 years ago)
• Last Synced: 2024-11-02T13:33:58.453Z (about 1 month ago)
• Topics: compression-format, crystal, crystal-lang, crystal-language, snappy
• Language: Crystal
• Size: 1.26 MB
• Stars: 18
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-crystal - snappy - Snappy compression format reader/writer for Crystal (Compression)
• awesome-crystal - snappy - Snappy compression format reader/writer for Crystal (Compression)

README

        
# Crystal Snappy

![CI](https://github.com/naqvis/snappy/workflows/CI/badge.svg)

[![GitHub release](https://img.shields.io/github/release/naqvis/snappy.svg)](https://github.com/naqvis/snappy/releases)

[![Docs](https://img.shields.io/badge/docs-available-brightgreen.svg)](https://naqvis.github.io/snappy/)

**Pure Crystal** implementation of [Snappy](https://github.com/google/snappy) compression format. This implementation supports more common case [Snappy Framing Format](https://github.com/google/snappy/blob/master/framing_format.txt).

## Installation

1. Add the dependency to your `shard.yml`:

   ```yaml

   dependencies:

     snappy:

       github: naqvis/snappy

   ```

2. Run `shards install`

## Usage

```crystal

require "snappy"

```

Module provides both `Compress::Snappy::Reader` and `Compress::Snappy::Writer` for use with streams like `IO` and/or files. It also provides `Compress::Snappy#decode` and `Compress::Snappy#encode` for uncompressing and compressing block formats.

## Example: decompress a snappy file

#

```crystal

require "snappy"

File.write("file.sz", Bytes[255, 6, 0, 0, 115, 78, 97, 80, 112, 89, 1, 8, 0, 0, 104, 16, 130, 162, 97, 98, 99, 100])

string = File.open("file.sz") do |file|

   Compress::Snappy::Reader.open(file) do |sz|

     sz.gets_to_end

   end

end

string # => "abcd"

```

## Example: compress a file to snappy format

#

```crystal

require "snappy"

File.write("file.txt", "abcd")

File.open("./file.txt", "r") do |input_file|

  File.open("./file.sz", "w") do |output_file|

    Compress::Snappy::Writer.open(output_file) do |sz|

      IO.copy(input_file, sz)

    end

  end

end

```

Refer to **specs** for usage examples.

## Development

To run all tests:

```

crystal spec

```

## Contributing

1. Fork it ()

2. Create your feature branch (`git checkout -b my-new-feature`)

3. Commit your changes (`git commit -am 'Add some feature'`)

4. Push to the branch (`git push origin my-new-feature`)

5. Create a new Pull Request

## Contributors

- [Ali Naqvi](https://github.com/naqvis) - creator and maintainer