binary-shared (empty) → 0.8
raw patch · 4 files changed
+543/−0 lines, 4 filesdep +basedep +binarydep +bytestringsetup-changed
Dependencies added: base, binary, bytestring, containers, mtl
Files
- LICENSE +339/−0
- Setup.lhs +6/−0
- binary-shared.cabal +27/−0
- src/Data/Binary/Shared.hs +171/−0
+ LICENSE view
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+ Setup.lhs view
@@ -0,0 +1,6 @@+#!/usr/bin/runhaskell +> module Main where +> import Distribution.Simple +> main :: IO () +> main = defaultMain +
@@ -0,0 +1,27 @@+name: binary-shared+version: 0.8+cabal-version: -any+build-type: Simple+license: GPL+license-file: LICENSE+copyright: Jürgen Nicklisch-Franken (jutaro)+maintainer: maintainer@leksah.org+build-depends: base >=4.0.0.0 && <5.0.0.0, binary >=0.5,+ bytestring >=0.9.1.4, containers >=0.2.0.0, mtl >=1.1.0.2+homepage: http://www.leksah.org+package-url: http://code.haskell.org/binary-shared+bug-reports: http://code.google.com/p/leksah/issues/list+synopsis: Sharing for the binary package+description: I had problems with the size of the allocated heap space after serializing+ and loading data with the binary package. The reason was that+ binary does not support sharing of identical elements, so I came up+ with the generic solution in this package.+category: Data+author: Jürgen Nicklisch-Franken (jutaro)+tested-with: GHC ==6.10 || ==6.12+data-dir: ""+exposed-modules: Data.Binary.Shared+exposed: True+buildable: True+pkgconfig-depends:+hs-source-dirs: src
@@ -0,0 +1,171 @@+{-# OPTIONS_GHC+ -XExistentialQuantification+ -XDeriveDataTypeable+ -XScopedTypeVariables #-}+-----------------------------------------------------------------------------+--+-- Module : Data.Binary.Shared+-- Copyright : 2007-2010 Juergen "jutaro" Nicklisch-Franken+-- License : GPL+--+-- Maintainer : Jutaro <jutaro@leksah.org>+-- Stability : provisional+-- Portability :+--+-- | Binary serializing with sharing+--+-----------------------------------------------------------------------------++module Data.Binary.Shared (+ BinaryShared(..)+, encodeFileSer+, encodeSer+, decodeSer+) where++import Data.Typeable (typeRepKey,cast,Typeable(..))+import qualified Control.Monad.State as St (StateT(..),get,put)+import Data.Map (Map(..))+import qualified Data.Map as Map (empty,fromDistinctAscList,toAscList,Map(..),insert,lookup)+import Data.IntMap (IntMap(..))+import qualified Data.IntMap as IMap (empty,IntMap(..),insert,lookup)+import qualified Data.Binary as Bin (getWord8,putWord8,Get(..),Binary(..))+import Data.Binary.Put (runPut,PutM(..),putWord64be)+import System.IO.Unsafe (unsafePerformIO)+import Control.Monad.Trans (lift)+import Control.Monad (liftM2,replicateM,liftM)+import qualified Data.Set as Set (fromDistinctAscList,toAscList,Set(..))+import qualified Data.ByteString.Lazy as L+import Data.ByteString (ByteString(..))+import Control.Monad.State.Lazy (evalStateT)+import Data.Binary.Get (runGet,getWord64be)++-- | A class for storing Binary instances with shared nodes.+-- Cycles are not supported, cause put and get is a one path process.++class (Typeable alpha, Ord alpha, Eq alpha, Show alpha) => BinaryShared alpha where+ -- | Encode a value in the Put monad.+ put :: alpha -> PutShared++ putShared :: (alpha -> PutShared) -> alpha -> PutShared+ putShared fput v = do+ (dict, unique) <- St.get+ case (ObjC v) `Map.lookup` dict of+ Just i -> lift (Bin.putWord8 0 >> putWord64be (fromIntegral i))+ Nothing -> do+ St.put (dict,unique + 1)+ lift (Bin.putWord8 1)+ lift (putWord64be (fromIntegral unique))+ fput v+ (dict2, unique2) <- St.get+ let newDict = Map.insert (ObjC v) unique dict2+ St.put (newDict,unique2)++ -- | Decode a value in the Get monad+ get :: GetShared alpha++ getShared :: GetShared alpha -> GetShared alpha+ getShared f = do+ dict <- St.get+ w <- lift Bin.getWord8+ case w of+ 0 -> do+ i <- lift (liftM fromIntegral (getWord64be))+ case IMap.lookup i dict of+ Just (ObjC obj) -> return (forceJust (cast obj)+ "Shared>>getShared: Cast failed")+ Nothing -> error $ "Shared>>getShared : Dont find in Map " ++ show i+ 1 -> do+ i <- lift (liftM fromIntegral (getWord64be))+ obj <- f+ dict2 <- St.get+ St.put (IMap.insert i (ObjC obj) dict2)+ return obj+ _ -> error $ "Shared>>getShared : Encoding error"+++-- * How to call this++encodeSer :: BinaryShared a => a -> L.ByteString+encodeSer v = runPut (evalStateT (put v) (Map.empty,0))++encodeFileSer :: BinaryShared a => FilePath -> a -> IO ()+encodeFileSer f v = L.writeFile f (encodeSer v)++decodeSer :: BinaryShared alpha => L.ByteString -> alpha+decodeSer = runGet (evalStateT get IMap.empty)++-- * The types needed internally++data Object = forall alpha. (Typeable alpha, Ord alpha, Eq alpha, Show alpha) => ObjC {unObj :: alpha}++instance Eq Object where+ (ObjC a) == (ObjC b) = if typeOf a /= typeOf b+ then False+ else (Just a) == cast b++instance Ord Object where+ compare (ObjC a) (ObjC b) = if typeOf a /= typeOf b+ then compare ((unsafePerformIO . typeRepKey . typeOf) a)+ ((unsafePerformIO . typeRepKey . typeOf) b)+ else compare (Just a) (cast b)++type PutShared = St.StateT (Map Object Int, Int) PutM ()+type GetShared = St.StateT (IntMap Object) Bin.Get++-----------+-- * Some standard instances, but very incomplete++instance BinaryShared a => BinaryShared [a] where+ put = putShared (\l -> lift (Bin.put (length l)) >> mapM_ put l)+ get = getShared (do+ n <- lift (Bin.get :: Bin.Get Int)+ replicateM n get)++instance (BinaryShared a) => BinaryShared (Maybe a) where+ put Nothing = lift (Bin.putWord8 0)+ put (Just x) = lift (Bin.putWord8 1) >> put x+ get = do+ w <- lift (Bin.getWord8)+ case w of+ 0 -> return Nothing+ _ -> liftM Just get++instance (BinaryShared a, BinaryShared b) => BinaryShared (a,b) where+ put (a,b) = put a >> put b+ get = liftM2 (,) get get++instance BinaryShared a => BinaryShared (Set.Set a) where+ put s = put (Set.toAscList s)+ get = liftM Set.fromDistinctAscList get++instance (BinaryShared k, BinaryShared e) => BinaryShared (Map.Map k e) where+ put m = put (Map.toAscList m)+ get = liftM Map.fromDistinctAscList get++instance BinaryShared Bool where+ put = lift . Bin.put+ get = lift Bin.get++instance BinaryShared Char where+ put = lift . Bin.put+ get = lift Bin.get++instance BinaryShared Int where+ put = lift . Bin.put+ get = lift Bin.get++instance BinaryShared Integer where+ put = lift . Bin.put+ get = lift Bin.get++instance BinaryShared ByteString where+ put = lift . Bin.put+ get = lift Bin.get+++forceJust :: Maybe alpha -> String -> alpha+forceJust mb str = case mb of+ Nothing -> error str+ Just it -> it+