About

Data.Binary is a library for high performance binary serialisation of Haskell data. It uses the ByteString library to achieve efficient, lazy reading and writing of structures in binary format.

Example

import Data.Binary
import Control.Monad
import Codec.Compression.GZip

-- A Haskell AST structure
data Exp = IntE Int
         | OpE  String Exp Exp
   deriving Eq

-- An instance of Binary to encode and decode an Exp in binary
instance Binary Exp where
     put (IntE i)          = put (0 :: Word8) >> put i
     put (OpE s e1 e2)     = put (1 :: Word8) >> put s >> put e1 >> put e2
     get = do tag <- getWord8
              case tag of
                  0 -> liftM  IntE get
                  1 -> liftM3 OpE  get get get

-- A test expression
e = OpE "*" (IntE 7) (OpE "/" (IntE 4) (IntE 2))

-- Serialise and compress with gzip, then decompress and deserialise
main = do
    let t  = compress (encode e)
    print t
    let e' = decode (decompress t)
    print (e == e')

Download

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• Documentation

Project Activity

Starring...

• Lennart Kolmodin
• Duncan Coutts
• Don Stewart
• Spencer Janssen
• David Himmelstrup
• Björn Bringert
• Ross Paterson
• Einar Karttunen
• John Meacham
• Ulf Norell
• Bryan O'Sullivan
• Tomasz Zielonka
• Florian Weimer
• Judah Jacobson