4dee785...master · binary-bits

git.iko.soy/binary-bits

on master help sign in

.gitignore+1

since splitsnapshots

unifiedsplit

@@ -1,3 +1,4 @@

1.cabal-sandbox

2cabal.sandbox.config

3dist/

4+.stack-work

BitsQC.hs+69−36

@@ -9,6 +9,7 @@ import Data.Binary.Put ( runPut )

9import Data.Binary.Bits

10import Data.Binary.Bits.Get

11import Data.Binary.Bits.Put

12+import Data.Binary.Bits.BitOrder

13import qualified Data.ByteString as B

14import qualified Data.ByteString as B

14import qualified Data.ByteString.Lazy as L

15import qualified Data.ByteString.Lazy as L

@@ -17,7 +18,8 @@ import Control.Applicative

17import Data.Bits

18import Data.Bits

18import Data.Word

19import Data.Word

19import Foreign.Storable

20import Foreign.Storable

20−import System.Random

21+import Data.Traversable (traverse)

22+import Data.Foldable (traverse_)

22import Test.Framework.Providers.QuickCheck2 ( testProperty )

24import Test.Framework.Providers.QuickCheck2 ( testProperty )

23import Test.Framework.Runners.Console ( defaultMain )

25import Test.Framework.Runners.Console ( defaultMain )

@@ -36,7 +38,10 @@ tests =

36 [ testProperty "prop_composite_case" prop_composite_case ]

38 [ testProperty "prop_composite_case" prop_composite_case ]

38 , testGroup "getByteString"

40 , testGroup "getByteString"

39− [ testProperty "prop_getByteString_negative" prop_getByteString_negative ]

41+ [ testProperty "prop_getByteString_negative" prop_getByteString_negative

42+ , testProperty "prop_putByteString_getByteString" (prop_putByteString_getByteString :: BitOrder -> B.ByteString -> Property)

43+ , testProperty "prop_putByteString_getByteString_many" (prop_putByteString_getByteString_many :: BitOrder -> [B.ByteString] -> Property)

44+ ]

41 , testGroup "getLazyByteString"

46 , testGroup "getLazyByteString"

42 [ testProperty "getLazyByteString == getByteString"

47 [ testProperty "getLazyByteString == getByteString"

@@ -84,10 +89,10 @@ tests =

84 ]

89 ]

86 , testGroup "prop_put_with_bitreq"

91 , testGroup "prop_put_with_bitreq"

87− [ testProperty "Word8" (prop_putget_with_bitreq :: W Word8 -> Property)

92+ [ testProperty "Word8" (prop_putget_with_bitreq :: BitOrder -> W Word8 -> Property)

88− , testProperty "Word16" (prop_putget_with_bitreq :: W Word16 -> Property)

93+ , testProperty "Word16" (prop_putget_with_bitreq :: BitOrder -> W Word16 -> Property)

89− , testProperty "Word32" (prop_putget_with_bitreq :: W Word32 -> Property)

94+ , testProperty "Word32" (prop_putget_with_bitreq :: BitOrder -> W Word32 -> Property)

90− , testProperty "Word64" (prop_putget_with_bitreq :: W Word64 -> Property)

95+ , testProperty "Word64" (prop_putget_with_bitreq :: BitOrder -> W Word64 -> Property)

91 ]

96 ]

93 , testGroup "prop_putget_list_simple"

98 , testGroup "prop_putget_list_simple"

@@ -112,10 +117,10 @@ tests =

112 , testProperty "Word64" (prop_putget_list_with_bitreq :: W [Word64] -> Property)

117 , testProperty "Word64" (prop_putget_list_with_bitreq :: W [Word64] -> Property)

113 ]

118 ]

114 , testGroup "prop_bitget_bytestring_interspersed"

119 , testGroup "prop_bitget_bytestring_interspersed"

115− [ testProperty "Word8" (prop_bitget_bytestring_interspersed :: W Word8 -> [B.ByteString] -> Property)

120+ [ testProperty "Word8" (prop_bitget_bytestring_interspersed :: BitOrder -> W Word8 -> [B.ByteString] -> Property)

116− , testProperty "Word16" (prop_bitget_bytestring_interspersed :: W Word16 -> [B.ByteString] -> Property)

121+ , testProperty "Word16" (prop_bitget_bytestring_interspersed :: BitOrder -> W Word16 -> [B.ByteString] -> Property)

117− , testProperty "Word32" (prop_bitget_bytestring_interspersed :: W Word32 -> [B.ByteString] -> Property)

122+ , testProperty "Word32" (prop_bitget_bytestring_interspersed :: BitOrder -> W Word32 -> [B.ByteString] -> Property)

118− , testProperty "Word64" (prop_bitget_bytestring_interspersed :: W Word64 -> [B.ByteString] -> Property)

123+ , testProperty "Word64" (prop_bitget_bytestring_interspersed :: BitOrder -> W Word64 -> [B.ByteString] -> Property)

119 ]

124 ]

120 , testGroup "Simulate programs"

125 , testGroup "Simulate programs"

121 [ testProperty "primitive" prop_primitive

126 [ testProperty "primitive" prop_primitive

@@ -158,13 +163,28 @@ prop_getByteString_negative n =

158 n < 1 ==>

163 n < 1 ==>

159 runGet (runBitGet (getByteString n)) L.empty == B.empty

164 runGet (runBitGet (getByteString n)) L.empty == B.empty

160

165

166+prop_putByteString_getByteString :: BitOrder -> B.ByteString -> Property

167+prop_putByteString_getByteString bo bs = property $ bs' == bs

168+ where

169+ n = B.length bs

170+ w = runPut (runBitPut (withBitOrder bo (putByteString bs)))

171+ bs' = runGet (runBitGet (withBitOrder bo (getByteString n))) w

172+

173+prop_putByteString_getByteString_many :: BitOrder -> [B.ByteString] -> Property

174+prop_putByteString_getByteString_many bo bs = property $ bs' == bs

175+ where

176+ n = fmap B.length bs

177+ w = runPut (runBitPut (withBitOrder bo (traverse_ putByteString bs)))

178+ bs' = runGet (runBitGet (withBitOrder bo (traverse getByteString n))) w

179+

180+

161−prop_putget_with_bitreq :: (BinaryBit a, Num a, Bits a, Ord a) => W a -> Property

181+prop_putget_with_bitreq :: (BinaryBit a, Num a, Bits a, Ord a) => BitOrder -> W a -> Property

162−prop_putget_with_bitreq (W w) = property $

182+prop_putget_with_bitreq bo (W w) = property $

163 -- write all words with as many bits as it's required

183 -- write all words with as many bits as it's required

164 let p = putBits (bitreq w) w

184 let p = putBits (bitreq w) w

165 g = getBits (bitreq w)

185 g = getBits (bitreq w)

166− lbs = runPut (runBitPut p)

186+ lbs = runPut (runBitPut (withBitOrder bo p))

167− w' = runGet (runBitGet g) lbs

187+ w' = runGet (runBitGet (withBitOrder bo g)) lbs

168 in w == w'

188 in w == w'

169

189

170-- | Write a list of items. Each item is written with the maximum amount of

190-- | Write a list of items. Each item is written with the maximum amount of

@@ -226,12 +246,12 @@ prop_bitget_with_put_from_binary (W ws) = property $

226 in ws == ws'

246 in ws == ws'

227

247

228-- | Write each 'ByteString' with a variable sized value as a separator.

248-- | Write each 'ByteString' with a variable sized value as a separator.

229−prop_bitget_bytestring_interspersed :: (BinaryBit a, Binary a, Num a, Ord a, Bits a) => W a -> [B.ByteString] -> Property

249+prop_bitget_bytestring_interspersed :: (BinaryBit a, Binary a, Num a, Ord a, Bits a) => BitOrder -> W a -> [B.ByteString] -> Property

230−prop_bitget_bytestring_interspersed (W ws) bss = property $

250+prop_bitget_bytestring_interspersed bo (W ws) bss = property $

231 let p = mapM_ (\bs -> putBits (bitreq ws) ws >> putByteString bs) bss

251 let p = mapM_ (\bs -> putBits (bitreq ws) ws >> putByteString bs) bss

232 g = mapM (\bs -> (,) <$> getBits (bitreq ws) <*> getByteString (B.length bs)) bss

252 g = mapM (\bs -> (,) <$> getBits (bitreq ws) <*> getByteString (B.length bs)) bss

233− lbs = runPut (runBitPut p)

253+ lbs = runPut (runBitPut (withBitOrder bo p))

234− r = runGet (runBitGet g) lbs

254+ r = runGet (runBitGet (withBitOrder bo g)) lbs

235 in map (ws,) bss == r

255 in map (ws,) bss == r

236

256

237-- | Test failing.

257-- | Test failing.

@@ -241,8 +261,8 @@ prop_fail lbs errMsg0 = forAll (choose (0, 8 * L.length lbs)) $ \len ->

241 expectedBytesConsumed

261 expectedBytesConsumed

242 | bits == 0 = bytes

262 | bits == 0 = bytes

243 | otherwise = bytes + 1

263 | otherwise = bytes + 1

244− p = do getByteString (fromIntegral bytes)

264+ p = do _ <- getByteString (fromIntegral bytes)

245− getBits (fromIntegral bits) :: BitGet Word8

265+ _ <- getBits (fromIntegral bits) :: BitGet Word8

246 fail errMsg0

266 fail errMsg0

247 r = runGetIncremental (runBitGet p) `pushChunks` lbs

267 r = runGetIncremental (runBitGet p) `pushChunks` lbs

248 in case r of

268 in case r of

@@ -268,7 +288,7 @@ prop_bitreq (W w) = property $

268prop_composite_case :: Bool -> W Word16 -> Property

288prop_composite_case :: Bool -> W Word16 -> Property

269prop_composite_case b (W w) = w < 0x8000 ==>

289prop_composite_case b (W w) = w < 0x8000 ==>

270 let p = do putBool b

290 let p = do putBool b

271− putWord16be 15 w

291+ putWord16 15 w

272 g = do v <- getBool

292 g = do v <- getBool

273 case v of

293 case v of

274 True -> getWord16 15

294 True -> getWord16 15

@@ -374,11 +394,6 @@ instance (Arbitrary (W a), Arbitrary (W b), Arbitrary (W c)) => Arbitrary (W (a,

374 arbitrary = ((W .) .) . (,,) <$> arbitraryW <*> arbitraryW <*> arbitraryW

394 arbitrary = ((W .) .) . (,,) <$> arbitraryW <*> arbitraryW <*> arbitraryW

375 shrink (W (a,b,c)) = ((W .) .) . (,,) <$> shrinkW a <*> shrinkW b <*> shrinkW c

395 shrink (W (a,b,c)) = ((W .) .) . (,,) <$> shrinkW a <*> shrinkW b <*> shrinkW c

376

396

377−integralRandomR :: (Integral a, RandomGen g) => (a,a) -> g -> (a,g)

378−integralRandomR (a,b) g = case randomR (fromIntegral a :: Integer,

379− fromIntegral b :: Integer) g of

380− (x,g) -> (fromIntegral x, g)

381−

382data Primitive

397data Primitive

383 = Bool Bool

398 = Bool Bool

384 | W8 Int Word8

399 | W8 Int Word8

@@ -387,6 +402,7 @@ data Primitive

387 | W64 Int Word64

402 | W64 Int Word64

388 | BS Int B.ByteString

403 | BS Int B.ByteString

389 | LBS Int L.ByteString

404 | LBS Int L.ByteString

405+ | Skip Int

390 | IsEmpty

406 | IsEmpty

391 deriving (Eq, Show)

407 deriving (Eq, Show)

392

408

@@ -405,6 +421,7 @@ instance Arbitrary Primitive where

405 , gen W16

421 , gen W16

406 , gen W32

422 , gen W32

407 , gen W64

423 , gen W64

424+ , Skip <$> choose (0, 3000)

408 , do n <- choose (0,10)

425 , do n <- choose (0,10)

409 cs <- vector n

426 cs <- vector n

410 return (BS n (B.pack cs))

427 return (BS n (B.pack cs))

@@ -421,10 +438,19 @@ instance Arbitrary Primitive where

421 W16 _ x -> snk W16 x

438 W16 _ x -> snk W16 x

422 W32 _ x -> snk W32 x

439 W32 _ x -> snk W32 x

423 W64 _ x -> snk W64 x

440 W64 _ x -> snk W64 x

441+ Skip x -> Skip <$> shrink x

424 BS _ bs -> let ws = B.unpack bs in map (\ws' -> BS (length ws') (B.pack ws')) (shrink ws)

442 BS _ bs -> let ws = B.unpack bs in map (\ws' -> BS (length ws') (B.pack ws')) (shrink ws)

425 LBS _ lbs -> let ws = L.unpack lbs in map (\ws' -> LBS (length ws') (L.pack ws')) (shrink ws)

443 LBS _ lbs -> let ws = L.unpack lbs in map (\ws' -> LBS (length ws') (L.pack ws')) (shrink ws)

426 IsEmpty -> []

444 IsEmpty -> []

427

445

446+instance Arbitrary BitOrder where

447+ arbitrary = elements [BB, LB, LL, BL]

448+ shrink LL = [BB,LB,BL]

449+ shrink BL = [BB,LB]

450+ shrink LB = [BB]

451+ shrink BB = []

452+

453+

428prop_primitive :: Primitive -> Property

454prop_primitive :: Primitive -> Property

429prop_primitive prim = property $

455prop_primitive prim = property $

430 let p = putPrimitive prim

456 let p = putPrimitive prim

@@ -446,9 +472,10 @@ putPrimitive p =

446 case p of

472 case p of

447 Bool b -> putBool b

473 Bool b -> putBool b

448 W8 n x -> putWord8 n x

474 W8 n x -> putWord8 n x

449− W16 n x -> putWord16be n x

475+ W16 n x -> putWord16 n x

450− W32 n x -> putWord32be n x

476+ W32 n x -> putWord32 n x

451− W64 n x -> putWord64be n x

477+ W64 n x -> putWord64 n x

478+ Skip n -> skipBits n

452 BS _ bs -> putByteString bs

479 BS _ bs -> putByteString bs

453 LBS _ lbs -> mapM_ putByteString (L.toChunks lbs)

480 LBS _ lbs -> mapM_ putByteString (L.toChunks lbs)

454 IsEmpty -> return ()

481 IsEmpty -> return ()

@@ -461,10 +488,22 @@ getPrimitive p =

461 W16 n _ -> W16 n <$> getWord16 n

488 W16 n _ -> W16 n <$> getWord16 n

462 W32 n _ -> W32 n <$> getWord32 n

489 W32 n _ -> W32 n <$> getWord32 n

463 W64 n _ -> W64 n <$> getWord64 n

490 W64 n _ -> W64 n <$> getWord64 n

491+ Skip n -> skipBits n >> return (Skip n)

464 BS n _ -> BS n <$> getByteString n

492 BS n _ -> BS n <$> getByteString n

465 LBS n _ -> LBS n <$> getLazyByteString n

493 LBS n _ -> LBS n <$> getLazyByteString n

466 IsEmpty -> isEmpty >> return IsEmpty

494 IsEmpty -> isEmpty >> return IsEmpty

467

495

496+getPrimitiveSize :: Primitive -> Int

497+getPrimitiveSize p = case p of

498+ Bool _ -> 1

499+ W8 n _ -> n

500+ W16 n _ -> n

501+ W32 n _ -> n

502+ W64 n _ -> n

503+ Skip n -> n

504+ BS n _ -> n*8

505+ LBS n _ -> n*8

506+ IsEmpty -> 0

468

507

469verifyProgram :: Int -> Program -> BitGet Bool

508verifyProgram :: Int -> Program -> BitGet Bool

470verifyProgram totalLength ps0 = go 0 ps0

509verifyProgram totalLength ps0 = go 0 ps0

@@ -472,13 +511,6 @@ verifyProgram totalLength ps0 = go 0 ps0

472 go _ [] = return True

511 go _ [] = return True

473 go pos (p:ps) =

512 go pos (p:ps) =

474 case p of

513 case p of

475− Bool x -> check x getBool >> go (pos+1) ps

476− W8 n x -> check x (getWord8 n) >> go (pos+n) ps

477− W16 n x -> check x (getWord16 n) >> go (pos+n) ps

478− W32 n x -> check x (getWord32 n) >> go (pos+n) ps

479− W64 n x -> check x (getWord64 n) >> go (pos+n) ps

480− BS n x -> check x (getByteString n) >> go (pos+(8*n)) ps

481− LBS n x -> check x (getLazyByteString n) >> go (pos+(8*n)) ps

482 IsEmpty -> do

514 IsEmpty -> do

483 let expected = pos == totalLength

515 let expected = pos == totalLength

484 actual <- isEmpty

516 actual <- isEmpty

@@ -486,6 +518,7 @@ verifyProgram totalLength ps0 = go 0 ps0

486 then go pos ps

518 then go pos ps

487 else error $ "isEmpty returned wrong value, expected "

519 else error $ "isEmpty returned wrong value, expected "

488 ++ show expected ++ " but got " ++ show actual

520 ++ show expected ++ " but got " ++ show actual

521+ _ -> check p (getPrimitive p) >> go (pos + getPrimitiveSize p) ps

489 check x g = do

522 check x g = do

490 y <- g

523 y <- g

491 if x == y

524 if x == y

Data/Binary/Bits.hs+3−3

@@ -33,13 +33,13 @@ instance BinaryBit Word8 where

33 getBits = getWord8

35instance BinaryBit Word16 where

36− putBits = putWord16be

36+ putBits = putWord16

37 getBits = getWord16

39instance BinaryBit Word32 where

40− putBits = putWord32be

40+ putBits = putWord32

41 getBits = getWord32

43instance BinaryBit Word64 where

44− putBits = putWord64be

44+ putBits = putWord64

45 getBits = getWord64

Data/Binary/Bits/Alignment.hsnew file+22

@@ -0,0 +1,22 @@

1+-----------------------------------------------------------------------------

2+-- |

3+-- Module : Data.Binary.Bits.Get

4+-- Copyright : (c) Lennart Kolmodin 2010-2011

5+-- (c) Sylvain Henry 2015

6+-- License : BSD3-style (see LICENSE)

7+--

8+-- Maintainer : kolmodin@gmail.com

9+-- Stability : experimental

10+-- Portability : portable (should run where the package binary runs)

11+

12+module Data.Binary.Bits.Alignment

13+ ( Alignable(..)

14+ )

15+where

16+

17+class Monad m => Alignable m where

18+ -- | Skip the given number of bits

19+ skipBits :: Int -> m ()

20+

21+ -- | Skip bits if necessary to align to the next byte

22+ alignByte :: m ()

Data/Binary/Bits/BitOrder.hsnew file+47

@@ -0,0 +1,47 @@

1+-----------------------------------------------------------------------------

2+-- |

3+-- Module : Data.Binary.Bits.Get

4+-- Copyright : (c) Lennart Kolmodin 2010-2011

5+-- (c) Sylvain Henry 2015

6+-- License : BSD3-style (see LICENSE)

7+--

8+-- Maintainer : kolmodin@gmail.com

9+-- Stability : experimental

10+-- Portability : portable (should run where the package binary runs)

11+

12+module Data.Binary.Bits.BitOrder

13+ ( BitOrder(..)

14+ , BitOrderable(..)

15+ )

16+where

17+

18+-- | Bit order

19+--

20+-- E.g. two words of 5 bits: ABCDE, VWXYZ

21+-- - BB: ABCDEVWX YZxxxxxx

22+-- - LL: XYZABCDE xxxxxxVW

23+-- - BL: EDCBAZYX WVxxxxxx

24+-- - LB: XWVEDCBA xxxxxxZY

25+data BitOrder

26+ = BB -- ^ Big-endian bytes and bits

27+ | LB -- ^ Little-endian bytes, big-endian bits

28+ | BL -- ^ Big-endian bytes, little-endian bits

29+ | LL -- ^ Little-endian bytes and bits

30+ deriving (Show)

31+

32+

33+class Monad m => BitOrderable m where

34+ -- | Set the current bit-order

35+ setBitOrder :: BitOrder -> m ()

36+

37+ -- | Retrieve the current bit-order

38+ getBitOrder :: m BitOrder

39+

40+ -- | Perform the given action with the given bit-order

41+ withBitOrder :: BitOrder -> m a -> m a

42+ withBitOrder bo act = do

43+ bo' <- getBitOrder

44+ setBitOrder bo

45+ r <- act

46+ setBitOrder bo'

47+ return r

Data/Binary/Bits/Get.hs+73−205

@@ -4,6 +4,7 @@

4-- |

5-- Module : Data.Binary.Bits.Get

6-- Copyright : (c) Lennart Kolmodin 2010-2011

7+-- (c) Sylvain Henry 2015

7-- License : BSD3-style (see LICENSE)

8-- License : BSD3-style (see LICENSE)

8--

9--

9-- Maintainer : kolmodin@gmail.com

10-- Maintainer : kolmodin@gmail.com

@@ -55,14 +56,11 @@ module Data.Binary.Bits.Get

55 -- $bitget

56 -- $bitget

57 BitGet

58 BitGet

58− , BitOrder(..)

59 , runBitGet

60− , getBitOrder

61− , selectBitOrder

62− , withBitOrder

64 -- ** Get bytes

61 -- ** Get bytes

65 , getBool

62 , getBool

63+ , getBool#

66 , getWord8

64 , getWord8

67 , getWord16

65 , getWord16

68 , getWord32

66 , getWord32

@@ -99,6 +97,9 @@ module Data.Binary.Bits.Get

100import Data.Binary.Get as B ( Get, getLazyByteString, isEmpty )

98import Data.Binary.Get as B ( Get, getLazyByteString, isEmpty )

101import Data.Binary.Get.Internal as B ( get, put, ensureN )

99import Data.Binary.Get.Internal as B ( get, put, ensureN )

100+import Data.Binary.Bits.BitOrder

101+import Data.Binary.Bits.Internal

102+import Data.Binary.Bits.Alignment

102

103

103import Data.ByteString as B

104import Data.ByteString as B

104import qualified Data.ByteString.Lazy as L

105import qualified Data.ByteString.Lazy as L

@@ -114,12 +115,8 @@ import Control.Applicative

114import Control.Monad (when,foldM_)

115import Control.Monad (when,foldM_)

115

116

116import Prelude as P

117import Prelude as P

117−

118−#if defined(__GLASGOW_HASKELL__) && !defined(__HADDOCK__)

119−import GHC.Base

120import GHC.Word

118import GHC.Word

121−#endif

119+import GHC.Base (uncheckedShiftLWord8#, wordToWord8#, Int (..), andWord8#, Word8#, (-#), Int#, xorI#, eqWord8#, TYPE)

122−

123

120

124-- $bitget

121-- $bitget

125-- Parse bits using a monad.

122-- Parse bits using a monad.

@@ -172,16 +169,6 @@ data S = S {-# UNPACK #-} !ByteString -- Input

172 !BitOrder -- Bit order

169 !BitOrder -- Bit order

173 deriving (Show)

170 deriving (Show)

174

171

175−-- | Compute bit offset (equivalent to x `mod` 8 but faster)

176−bit_offset :: Int -> Int

177−bit_offset n = make_mask 3 .&. n

178−{-# INLINE bit_offset #-}

179−

180−-- | Compute byte offset (equivalent to x `div` 8 but faster)

181−byte_offset :: Int -> Int

182−byte_offset n = n `shiftR` 3

183−{-# INLINE byte_offset #-}

184−

185-- | Increment the current bit offset

172-- | Increment the current bit offset

186incS :: Int -> S -> S

173incS :: Int -> S -> S

187incS o (S bs n bo) = S (unsafeDrop d bs) n' bo

174incS o (S bs n bo) = S (unsafeDrop d bs) n' bo

@@ -190,58 +177,30 @@ incS o (S bs n bo) = S (unsafeDrop d bs) n' bo

190 !d = byte_offset o'

177 !d = byte_offset o'

191 !n' = bit_offset o'

178 !n' = bit_offset o'

192

179

193−-- | Select the bit ordering

194−selectBitOrderS :: BitOrder -> S -> S

195−selectBitOrderS bo (S bs o _) = S bs o bo

196−

197−-- | make_mask 3 = 00000111

198−make_mask :: (Bits a, Num a) => Int -> a

199−make_mask n = (1 `shiftL` fromIntegral n) - 1

200−{-# SPECIALIZE make_mask :: Int -> Int #-}

201−{-# SPECIALIZE make_mask :: Int -> Word #-}

202−{-# SPECIALIZE make_mask :: Int -> Word8 #-}

203−{-# SPECIALIZE make_mask :: Int -> Word16 #-}

204−{-# SPECIALIZE make_mask :: Int -> Word32 #-}

205−{-# SPECIALIZE make_mask :: Int -> Word64 #-}

206−

207−-- | Keep only the n least-significant bits of the given value

208−mask :: (Bits a, Num a) => Int -> a -> a

209−mask n v = v .&. make_mask n

210−{-# INLINE mask #-}

211−

212−-- | Bit order

213−--

214−-- E.g. two words of 5 bits: ABCDE, VWXYZ

215−-- - BB: ABCDEVWX YZxxxxxx

216−-- - LB: XYZABCDE xxxxxxVW

217−-- - BL: EDCBAZYX WVxxxxxx

218−-- - LL: XWVEDCBA xxxxxxZY

219−data BitOrder = BB | LB | BL | LL deriving (Show)

220−

221−-- | Reverse the @n@ least important bits of the given value

222−reverseBits :: (Num a, FastBits a, Bits a) => Int -> a -> a

223−reverseBits n value = rec value n 0

224− where

225− -- rec v i r, where

226− -- v is orginal value shifted

227− -- i is the remaining number of bits

228− -- r is current value

229− rec 0 0 r = r

230− rec 0 i r = r `fastShiftL` i

231− rec v i r = rec (v `fastShiftR` 1) (i-1) ((r `fastShiftL` 1) .|. (v .&. 0x1))

232−

233-- | Read a single bit

180-- | Read a single bit

234readBool :: S -> Bool

181readBool :: S -> Bool

235readBool (S bs o bo) = case bo of

182readBool (S bs o bo) = case bo of

236 BB -> testBit (unsafeHead bs) (7-o)

183 BB -> testBit (unsafeHead bs) (7-o)

237 BL -> testBit (unsafeHead bs) (7-o)

184 BL -> testBit (unsafeHead bs) (7-o)

238− LB -> testBit (unsafeHead bs) o

239 LL -> testBit (unsafeHead bs) o

185 LL -> testBit (unsafeHead bs) o

186+ LB -> testBit (unsafeHead bs) o

187+

188+-- | Read a single bit

189+readBool# :: S -> Int

190+readBool# (S bs (I# o) bo) = case bo of

191+ BB -> testBit# (7# -# o)

192+ BL -> testBit# (7# -# o)

193+ LL -> testBit# o

194+ LB -> testBit# o

195+ where

196+ !(W8# w) = unsafeHead bs

197+ testBit# n = I# (((w `andWord8#` (wordToWord8# 1## `uncheckedShiftLWord8#` n)) `eqWord8#` wordToWord8# 0##) `xorI#` 1#)

198+

240

199

241-- | Extract a range of bits from (ws :: ByteString)

200-- | Extract a range of bits from (ws :: ByteString)

242--

201--

243-- Constraint: 8 * (length ws -1 ) < o+n <= 8 * length ws

202-- Constraint: 8 * (length ws -1 ) < o+n <= 8 * length ws

244−extract :: (Num a, Bits a, FastBits a) => BitOrder -> ByteString -> Int -> Int -> a

203+extract :: (Num a, FastBits a) => BitOrder -> ByteString -> Int -> Int -> a

245extract bo bs o n

204extract bo bs o n

246 | n == 0 = 0

205 | n == 0 = 0

247 | B.length bs == 0 = error "Empty ByteString"

206 | B.length bs == 0 = error "Empty ByteString"

@@ -259,36 +218,29 @@ extract bo bs o n

259

218

260 -- shift offset depending on the byte position (0..B.length-1)

219 -- shift offset depending on the byte position (0..B.length-1)

261 off i = case bo of

220 off i = case bo of

262− LB -> 8*i - o

263 LL -> 8*i - o

221 LL -> 8*i - o

222+ LB -> 8*i - o

264 BB -> (B.length bs -1 - i) * 8 - r

223 BB -> (B.length bs -1 - i) * 8 - r

265 BL -> (B.length bs -1 - i) * 8 - r

224 BL -> (B.length bs -1 - i) * 8 - r

266

225

267 -- reverse bits if necessary

226 -- reverse bits if necessary

268 rev = case bo of

227 rev = case bo of

269− LL -> reverseBits n

228+ LB -> reverseBits n

270 BL -> reverseBits n

229 BL -> reverseBits n

271− BB -> id

230+ BB -> id

272− LB -> id

231+ LL -> id

273

232

274

233

275-- | Generic readWord

234-- | Generic readWord

276−readWord :: (Num a, Bits a, FastBits a) => Int -> S -> a

235+readWord :: (Num a, FastBits a) => Int -> S -> a

277readWord n (S bs o bo)

236readWord n (S bs o bo)

278 | n == 0 = 0

237 | n == 0 = 0

279− | o+n <= 8 = extract bo (unsafeTake 1 bs) o n

280− | o+n <= 16 = extract bo (unsafeTake 2 bs) o n

281− | o+n <= 24 = extract bo (unsafeTake 3 bs) o n

282− | o+n <= 32 = extract bo (unsafeTake 4 bs) o n

283− | o+n <= 40 = extract bo (unsafeTake 5 bs) o n

284− | o+n <= 48 = extract bo (unsafeTake 6 bs) o n

285− | o+n <= 56 = extract bo (unsafeTake 7 bs) o n

286− | o+n <= 64 = extract bo (unsafeTake 8 bs) o n

287− | otherwise = extract bo (unsafeTake ((o+n+7) `div` 8) bs) o n

238+ | otherwise = extract bo (unsafeTake nbytes bs) o n

239+ where nbytes = byte_offset (o+n+7)

288

240

289-- | Check that the number of bits to read is not greater than the first parameter

241-- | Check that the number of bits to read is not greater than the first parameter

290{-# INLINE readWordChecked #-}

242{-# INLINE readWordChecked #-}

291−readWordChecked :: (Num a, Bits a, FastBits a) => Int -> Int -> S -> a

243+readWordChecked :: (Num a, FastBits a) => Int -> Int -> S -> a

292readWordChecked m n s

244readWordChecked m n s

293 | n > m = error $ "Tried to read more than " ++ show m ++ " bits (" ++ show n ++")"

245 | n > m = error $ "Tried to read more than " ++ show m ++ " bits (" ++ show n ++")"

294 | otherwise = readWord n s

246 | otherwise = readWord n s

@@ -296,23 +248,24 @@ readWordChecked m n s

296-- | Read the given number of bytes and return them in Big-Endian order

248-- | Read the given number of bytes and return them in Big-Endian order

297--

249--

298-- Examples:

250-- Examples:

299−-- BB: xxxABCDE FGHIJKLM NOPQRxxx -> ABCDEFGH IJKLMNOP QRxxxxxx

251+-- BB: xxxABCDE FGHIJKLM NOPxxxxx -> ABCDEFGH IJKLMNOP

300−-- LB: NOPQRxxx FGHIJKLM xxxABCDE -> ABCDEFGH IJKLMNOP QRxxxxxx

252+-- LL: LMNOPxxx DEFGHIJK xxxxxABC -> ABCDEFGH IJKLMNOP

301−-- BL: xxxRQPON MLKJIHGF EDCBAxxx -> ABCDEFGH IJKLMNOP QRxxxxxx

253+-- BL: xxxPONML KJIHGFED CBAxxxxx -> ABCDEFGH IJKLMNOP

302−-- LL: EDCBAxxx MLKJIHGF xxxRQPON -> ABCDEFGH IJKLMNOP QRxxxxxx

254+-- LB: EDCBAxxx MLKJIHGF xxxxxPON -> ABCDEFGH IJKLMNOP

303readByteString :: Int -> S -> ByteString

255readByteString :: Int -> S -> ByteString

304readByteString n (S bs o bo) =

256readByteString n (S bs o bo) =

305 let

257 let

306− bs' = unsafeTake (n+1) bs

258+ bs' = unsafeTake (n+1) bs

259+ bs'' = unsafeTake n bs

307− rev = B.map (reverseBits 9)

260+ rev = B.map (reverseBits 8)

308 in case (o,bo) of

261 in case (o,bo) of

309− (0,BB) -> unsafeTake n bs

262+ (0,BB) -> bs''

310− (0,LB) -> B.reverse (unsafeTake n bs)

263+ (0,LL) -> B.reverse bs''

311− (0,BL) -> rev (unsafeTake n bs)

264+ (0,LB) -> rev bs''

312− (0,LL) -> rev (B.reverse (unsafeTake n bs))

265+ (0,BL) -> rev . B.reverse $ bs''

313− (_,BL) -> rev (readByteString n (S (B.reverse bs') o LB))

266+ (_,LL) -> readByteString n (S (B.reverse bs') (8-o) BB)

314− (_,LL) -> rev (readByteString n (S (B.reverse bs') o BB))

267+ (_,BL) -> rev . B.reverse $ readByteString n (S bs' o BB)

315− (_,LB) -> readByteString n (S (B.reverse bs') o BB)

268+ (_,LB) -> rev . B.reverse $ readByteString n (S bs' o LL)

316 (_,BB) -> unsafePerformIO $ do

269 (_,BB) -> unsafePerformIO $ do

317 let len = n+1

270 let len = n+1

318 ptr <- mallocBytes len

271 ptr <- mallocBytes len

@@ -334,7 +287,6 @@ newtype BitGet a = B { runState :: S -> Get (S,a) }

334

287

335instance Monad BitGet where

288instance Monad BitGet where

336 return x = B $ \s -> return (s,x)

289 return x = B $ \s -> return (s,x)

337− fail str = B $ \s -> putBackState s >> fail str

338 (B f) >>= g = B $ \s -> do (s',a) <- f s

290 (B f) >>= g = B $ \s -> do (s',a) <- f s

339 runState (g a) s'

291 runState (g a) s'

340

292

@@ -345,6 +297,29 @@ instance Applicative BitGet where

345 pure x = return x

297 pure x = return x

346 fm <*> m = fm >>= \f -> m >>= \v -> return (f v)

298 fm <*> m = fm >>= \f -> m >>= \v -> return (f v)

347

299

300+instance BitOrderable BitGet where

301+ setBitOrder bo = do

302+ (S bs o _) <- getState

303+ putState (S bs o bo)

304+

305+ getBitOrder = do

306+ (S _ _ bo) <- getState

307+ return bo

308+

309+instance Alignable BitGet where

310+ -- | Skip the given number of bits

311+ skipBits n = do

312+ ensureBits n

313+ withState (incS n)

314+

315+ -- | Skip bits if necessary to align to the next byte

316+ alignByte = do

317+ (S _ o _) <- getState

318+ when (o /= 0) $

319+ skipBits (8-o)

320+

321+

322+

348-- | Run a 'BitGet' within the Binary packages 'Get' monad. If a byte has

323-- | Run a 'BitGet' within the Binary packages 'Get' monad. If a byte has

349-- been partially consumed it will be discarded once 'runBitGet' is finished.

324-- been partially consumed it will be discarded once 'runBitGet' is finished.

350runBitGet :: BitGet a -> Get a

325runBitGet :: BitGet a -> Get a

@@ -379,13 +354,6 @@ withState f = do

379 s <- getState

354 s <- getState

380 putState $! f s

355 putState $! f s

381

356

382−-- | Get the bit ordering

383−getBitOrder :: BitGet BitOrder

384−getBitOrder = do

385− (S _ _ bo) <- getState

386− return bo

387−

388−

389-- | Make sure there are at least @n@ bits.

357-- | Make sure there are at least @n@ bits.

390ensureBits :: Int -> BitGet ()

358ensureBits :: Int -> BitGet ()

391ensureBits n = do

359ensureBits n = do

@@ -399,33 +367,6 @@ ensureBits n = do

399 put B.empty

367 put B.empty

400 return (S (bs`append`bs') o bo, ())

368 return (S (bs`append`bs') o bo, ())

401

369

402−-- | Skip the given number of bits

403−skipBits :: Int -> BitGet ()

404−skipBits n = do

405− ensureBits n

406− withState (incS n)

407−

408−-- | Skip bits if necessary to align to the next byte

409−alignByte :: BitGet ()

410−alignByte = do

411− (S _ o _) <- getState

412− when (o /= 0) $

413− skipBits (8-o)

414−

415−-- | Select the bit ordering

416−selectBitOrder :: BitOrder -> BitGet ()

417−selectBitOrder = withState . selectBitOrderS

418−

419−withBitOrder :: BitOrder -> BitGet a -> BitGet a

420−withBitOrder bo f = do

421− bo' <- getBitOrder

422− selectBitOrder bo

423− r <- f

424− selectBitOrder bo'

425− return r

426−

427−

428−

429-- | Test whether all input has been consumed, i.e. there are no remaining

370-- | Test whether all input has been consumed, i.e. there are no remaining

430-- undecoded bytes.

371-- undecoded bytes.

431isEmpty :: BitGet Bool

372isEmpty :: BitGet Bool

@@ -437,6 +378,10 @@ isEmpty = B $ \ (S bs o bo) -> if B.null bs

437getBool :: BitGet Bool

378getBool :: BitGet Bool

438getBool = block bool

379getBool = block bool

439

380

381+-- | Get 1 bit as a 'Bool'.

382+getBool# :: BitGet Int

383+getBool# = block bool#

384+

440-- | Get @n@ bits as a 'Word8'. @n@ must be within @[0..8]@.

385-- | Get @n@ bits as a 'Word8'. @n@ must be within @[0..8]@.

441getWord8 :: Int -> BitGet Word8

386getWord8 :: Int -> BitGet Word8

442getWord8 n = block (word8 n)

387getWord8 n = block (word8 n)

@@ -512,6 +457,10 @@ block (Block i p) = do

512bool :: Block Bool

457bool :: Block Bool

513bool = Block 1 readBool

458bool = Block 1 readBool

514

459

460+-- | Read a 1 bit 'Bool'.

461+bool# :: Block Int

462+bool# = Block 1 readBool#

463+

515-- | Read @n@ bits as a 'Word8'. @n@ must be within @[0..8]@.

464-- | Read @n@ bits as a 'Word8'. @n@ must be within @[0..8]@.

516word8 :: Int -> Block Word8

465word8 :: Int -> Block Word8

517word8 n = Block n (readWordChecked 8 n)

466word8 n = Block n (readWordChecked 8 n)

@@ -545,84 +494,3 @@ byteString :: Int -> Block ByteString

545byteString n | n > 0 = Block (n*8) (readByteString n)

494byteString n | n > 0 = Block (n*8) (readByteString n)

546 | otherwise = Block 0 (\_ -> B.empty)

495 | otherwise = Block 0 (\_ -> B.empty)

547

496

548−

549−---------------------------------------------------------------------

550−-- Unchecked shifts, from the "binary" package

551−

552−-- | Class for types supporting fast bit shifting

553−class FastBits a where

554− fastShiftR :: a -> Int -> a

555− fastShiftL :: a -> Int -> a

556−

557− {-# INLINE fastShift #-}

558− fastShift :: a -> Int -> a

559− fastShift x n

560− | n > 0 = fastShiftL x n

561− | n < 0 = fastShiftR x (negate n)

562− | otherwise = x

563−

564−instance FastBits Word8 where

565− fastShiftR = shiftr_w8

566− fastShiftL = shiftl_w8

567−

568−instance FastBits Word16 where

569− fastShiftR = shiftr_w16

570− fastShiftL = shiftl_w16

571−

572−instance FastBits Word32 where

573− fastShiftR = shiftr_w32

574− fastShiftL = shiftl_w32

575−

576−instance FastBits Word64 where

577− fastShiftR = shiftr_w64

578− fastShiftL = shiftl_w64

579−

580−

581−shiftl_w8 :: Word8 -> Int -> Word8

582−shiftl_w16 :: Word16 -> Int -> Word16

583−shiftl_w32 :: Word32 -> Int -> Word32

584−shiftl_w64 :: Word64 -> Int -> Word64

585−

586−shiftr_w8 :: Word8 -> Int -> Word8

587−shiftr_w16 :: Word16 -> Int -> Word16

588−shiftr_w32 :: Word32 -> Int -> Word32

589−shiftr_w64 :: Word64 -> Int -> Word64

590−

591−#if defined(__GLASGOW_HASKELL__) && !defined(__HADDOCK__)

592−shiftl_w8 (W8# w) (I# i) = W8# (w `uncheckedShiftL#` i)

593−shiftl_w16 (W16# w) (I# i) = W16# (w `uncheckedShiftL#` i)

594−shiftl_w32 (W32# w) (I# i) = W32# (w `uncheckedShiftL#` i)

595−

596−shiftr_w8 (W8# w) (I# i) = W8# (w `uncheckedShiftRL#` i)

597−shiftr_w16 (W16# w) (I# i) = W16# (w `uncheckedShiftRL#` i)

598−shiftr_w32 (W32# w) (I# i) = W32# (w `uncheckedShiftRL#` i)

599−

600−

601−#if WORD_SIZE_IN_BITS < 64

602−shiftl_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftL64#` i)

603−shiftr_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftRL64#` i)

604−

605−#if __GLASGOW_HASKELL__ <= 606

606−-- Exported by GHC.Word in GHC 6.8 and higher

607−foreign import ccall unsafe "stg_uncheckedShiftL64"

608− uncheckedShiftL64# :: Word64# -> Int# -> Word64#

609−foreign import ccall unsafe "stg_uncheckedShiftRL64"

610− uncheckedShiftRL64# :: Word64# -> Int# -> Word64#

611−#endif

612−

613−#else

614−shiftl_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftL#` i)

615−shiftr_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftRL#` i)

616−#endif

617−

618−#else

619−shiftl_w8 = shiftL

620−shiftl_w16 = shiftL

621−shiftl_w32 = shiftL

622−shiftl_w64 = shiftL

623−

624−shiftr_w8 = shiftR

625−shiftr_w16 = shiftR

626−shiftr_w32 = shiftR

627−shiftr_w64 = shiftR

628−#endif

Data/Binary/Bits/Internal.hsnew file+176

@@ -0,0 +1,176 @@

1+{-# LANGUAGE RankNTypes, MagicHash, BangPatterns, CPP #-}

3+-----------------------------------------------------------------------------

4+-- |

5+-- Module : Data.Binary.Bits.Get

6+-- Copyright : (c) Lennart Kolmodin 2010-2011

7+-- License : BSD3-style (see LICENSE)

8+--

9+-- Maintainer : kolmodin@gmail.com

10+-- Stability : experimental

11+-- Portability : portable (should run where the package binary runs)

12+

13+module Data.Binary.Bits.Internal

14+ ( make_mask

15+ , make_mask#

16+ , mask

17+ , mask#

18+ , bit_offset

19+ , byte_offset

20+ , reverseBits

21+ , reverseBits#

22+ , FastBits(..)

23+ )

24+where

25+

26+import Data.Word

27+import Data.Bits

28+

29+#if defined(__GLASGOW_HASKELL__) && !defined(__HADDOCK__)

30+import GHC.Base

31+import GHC.Word

32+#endif

33+

34+-- | make_mask 3 = 00000111

35+make_mask :: (Bits a, Num a) => Int -> a

36+make_mask n = (1 `shiftL` fromIntegral n) - 1

37+{-# SPECIALIZE make_mask :: Int -> Int #-}

38+{-# SPECIALIZE make_mask :: Int -> Word #-}

39+{-# SPECIALIZE make_mask :: Int -> Word8 #-}

40+{-# SPECIALIZE make_mask :: Int -> Word16 #-}

41+{-# SPECIALIZE make_mask :: Int -> Word32 #-}

42+{-# SPECIALIZE make_mask :: Int -> Word64 #-}

43+

44+make_mask# :: Int# -> Word#

45+make_mask# n = (1## `shiftL#` n) `minusWord#` 1##

46+

47+-- | Keep only the n least-significant bits of the given value

48+mask :: (Bits a, Num a) => Int -> a -> a

49+mask n v = v .&. make_mask n

50+{-# INLINE mask #-}

51+

52+-- | Keep only the n least-significant bits of the given value

53+mask# :: Int# -> Word# -> Word#

54+mask# n v = v `and#` make_mask# n

55+

56+-- | Compute bit offset (equivalent to x `mod` 8 but faster)

57+bit_offset :: Int -> Int

58+bit_offset n = make_mask 3 .&. n

59+{-# INLINE bit_offset #-}

60+

61+-- | Compute byte offset (equivalent to x `div` 8 but faster)

62+byte_offset :: Int -> Int

63+byte_offset n = n `shiftR` 3

64+{-# INLINE byte_offset #-}

65+

66+-- | Reverse the @n@ least important bits of the given value

67+reverseBits :: (Num a, FastBits a, Bits a) => Int -> a -> a

68+reverseBits n value = rec value n 0

69+ where

70+ -- rec v i r, where

71+ -- v is orginal value shifted

72+ -- i is the remaining number of bits

73+ -- r is current value

74+ rec 0 0 r = r

75+ rec 0 i r = r `fastShiftL` i

76+ rec v i r = rec (v `fastShiftR` 1) (i-1) ((r `fastShiftL` 1) .|. (v .&. 0x1))

77+

78+reverseBits# :: Int# -> Word# -> Word#

79+reverseBits# n value = rec value n 0##

80+ where

81+ -- rec v i r, where

82+ -- v is orginal value shifted

83+ -- i is the remaining number of bits

84+ -- r is current value

85+ rec 0## 0# r = r

86+ rec 0## i r = r `shiftL#` i

87+ rec v i r = rec (v `shiftRL#` 1#) (i -# 1#) ((r `shiftL#` 1#) `or#` (v `and#` 0x1##))

88+

89+

90+---------------------------------------------------------------------

91+-- Unchecked shifts, from the "binary" package

92+

93+-- | Class for types supporting fast bit shifting

94+class Bits a => FastBits a where

95+ fastShiftR :: a -> Int -> a

96+ fastShiftR = shiftR

97+

98+ fastShiftL :: a -> Int -> a

99+ fastShiftL = shiftL

100+

101+ {-# INLINE fastShift #-}

102+ fastShift :: a -> Int -> a

103+ fastShift x n

104+ | n > 0 = fastShiftL x n

105+ | n < 0 = fastShiftR x (negate n)

106+ | otherwise = x

107+

108+instance FastBits Word8 where

109+ fastShiftR = shiftr_w8

110+ fastShiftL = shiftl_w8

111+

112+instance FastBits Word16 where

113+ fastShiftR = shiftr_w16

114+ fastShiftL = shiftl_w16

115+

116+instance FastBits Word32 where

117+ fastShiftR = shiftr_w32

118+ fastShiftL = shiftl_w32

119+

120+instance FastBits Word64 where

121+ fastShiftR = shiftr_w64

122+ fastShiftL = shiftl_w64

123+

124+instance FastBits Int

125+

126+instance FastBits Word

127+

128+

129+shiftl_w8 :: Word8 -> Int -> Word8

130+shiftl_w16 :: Word16 -> Int -> Word16

131+shiftl_w32 :: Word32 -> Int -> Word32

132+shiftl_w64 :: Word64 -> Int -> Word64

133+

134+shiftr_w8 :: Word8 -> Int -> Word8

135+shiftr_w16 :: Word16 -> Int -> Word16

136+shiftr_w32 :: Word32 -> Int -> Word32

137+shiftr_w64 :: Word64 -> Int -> Word64

138+

139+#if defined(__GLASGOW_HASKELL__) && !defined(__HADDOCK__)

140+shiftl_w8 w i = w `unsafeShiftL` i

141+shiftl_w16 w i = w `unsafeShiftL` i

142+shiftl_w32 w i = w `unsafeShiftL` i

143+

144+shiftr_w8 w i = w `unsafeShiftR` i

145+shiftr_w16 w i = w `unsafeShiftR` i

146+shiftr_w32 w i = w `unsafeShiftR` i

147+

148+

149+#if WORD_SIZE_IN_BITS < 64

150+shiftl_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftL64#` i)

151+shiftr_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftRL64#` i)

152+

153+#if __GLASGOW_HASKELL__ <= 606

154+-- Exported by GHC.Word in GHC 6.8 and higher

155+foreign import ccall unsafe "stg_uncheckedShiftL64"

156+ uncheckedShiftL64# :: Word64# -> Int# -> Word64#

157+foreign import ccall unsafe "stg_uncheckedShiftRL64"

158+ uncheckedShiftRL64# :: Word64# -> Int# -> Word64#

159+#endif

160+

161+#else

162+shiftl_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftL#` i)

163+shiftr_w64 (W64# w) (I# i) = W64# (w `uncheckedShiftRL#` i)

164+#endif

165+

166+#else

167+shiftl_w8 = shiftL

168+shiftl_w16 = shiftL

169+shiftl_w32 = shiftL

170+shiftl_w64 = shiftL

171+

172+shiftr_w8 = shiftR

173+shiftr_w16 = shiftR

174+shiftr_w32 = shiftR

175+shiftr_w64 = shiftR

176+#endif

Data/Binary/Bits/Put.hs+186−76

@@ -1,7 +1,10 @@

1+{-# LANGUAGE MagicHash #-}

1-----------------------------------------------------------------------------

3-----------------------------------------------------------------------------

2-- |

4-- |

3-- Module : Data.Binary.Bits.Put

5-- Module : Data.Binary.Bits.Put

4-- Copyright : (c) Lennart Kolmodin 2010-2011

6-- Copyright : (c) Lennart Kolmodin 2010-2011

7+-- (c) Sylvain Henry 2015

5-- License : BSD3-style (see LICENSE)

8-- License : BSD3-style (see LICENSE)

6--

9--

7-- Maintainer : kolmodin@gmail.com

10-- Maintainer : kolmodin@gmail.com

@@ -19,9 +22,14 @@ module Data.Binary.Bits.Put

19 -- * Data types

22 -- * Data types

20 -- ** Bool

23 -- ** Bool

21 , putBool

24 , putBool

25+ , putBool#

23 -- ** Words

27 -- ** Words

28+ , putWord#

24 , putWord8

29 , putWord8

30+ , putWord16

31+ , putWord32

32+ , putWord64

25 , putWord16be

33 , putWord16be

26 , putWord32be

34 , putWord32be

27 , putWord64be

35 , putWord64be

@@ -35,125 +43,210 @@ import qualified Data.Binary.Builder as B

35import Data.Binary.Builder ( Builder )

43import Data.Binary.Builder ( Builder )

36import qualified Data.Binary.Put as Put

44import qualified Data.Binary.Put as Put

37import Data.Binary.Put ( Put )

45import Data.Binary.Put ( Put )

46+import Data.Binary.Bits.Internal

47+import Data.Binary.Bits.BitOrder

48+import Data.Binary.Bits.Alignment

39−import Data.ByteString

50+import Data.ByteString as BS

51+import Data.ByteString.Unsafe as BS

41−import Control.Applicative

53+import Control.Monad (when)

42import Data.Bits

54import Data.Bits

43−import Data.Monoid

44import Data.Word

55import Data.Word

56+import GHC.Base (Word#, shiftRL#, Int (..), Int#, (-#), (<#), isTrue#, (+#), shiftL#, wordToWord8#, orWord8#)

57+import GHC.Word (Word8(..))

46data BitPut a = BitPut { run :: (S -> PairS a) }

59data BitPut a = BitPut { run :: (S -> PairS a) }

48data PairS a = PairS a {-# UNPACK #-} !S

61data PairS a = PairS a {-# UNPACK #-} !S

50−data S = S !Builder !Word8 !Int

63+data S = S !Builder !Word8 !Int !BitOrder

52-- | Put a 1 bit 'Bool'.

65-- | Put a 1 bit 'Bool'.

53putBool :: Bool -> BitPut ()

66putBool :: Bool -> BitPut ()

54putBool b = putWord8 1 (if b then 0xff else 0x00)

67putBool b = putWord8 1 (if b then 0xff else 0x00)

56−-- | make_mask 3 = 00000111

69+-- | Put a 1 bit 'Bool'.

57−make_mask :: (Bits a, Num a) => Int -> a

70+putBool# :: Word# -> BitPut ()

58−make_mask n = (1 `shiftL` fromIntegral n) - 1

71+putBool# b = putWord# 1# b

59−{-# SPECIALIZE make_mask :: Int -> Int #-}

72+

60−{-# SPECIALIZE make_mask :: Int -> Word #-}

73+

61−{-# SPECIALIZE make_mask :: Int -> Word8 #-}

74+-- | Generic putWord

62−{-# SPECIALIZE make_mask :: Int -> Word16 #-}

75+putWord :: (Num a, FastBits a, Integral a) => Int -> a -> BitPut ()

63−{-# SPECIALIZE make_mask :: Int -> Word32 #-}

76+putWord n w = BitPut $ \s -> PairS () (putWordS n w s)

64−{-# SPECIALIZE make_mask :: Int -> Word64 #-}

77+

78+putWord# :: Int# -> Word# -> BitPut ()

79+putWord# n w = BitPut $ \s -> PairS () (putWordS# n w s)

80+

81+putWordS :: (Num a, FastBits a, Integral a) => Int -> a -> S -> S

82+putWordS n w s@(S builder b o bo) = s'

83+ where

84+ -- number of bits that will be stored in the current byte

85+ cn = min (8-o) n

86+

87+ -- new state

88+ s' = case n of

89+ 0 -> s

90+ _ -> putWordS (n-cn) w' (flush (S builder b' (o+cn) bo))

91+

92+ -- new current byte

93+ b' = shl (selectBits w) .|. b

94+

95+ -- Word containing the remaining (n-cn) bits to store in its LSB

96+ w' = case bo of

97+ BB -> w

98+ BL -> w `fastShiftR` cn

99+ LL -> w `fastShiftR` cn

100+ LB -> w

101+

102+ -- Select bits to store in the current byte.

103+ -- Put them in the correct order and return them in the least-significant

104+ -- bits of the returned value

105+ selectBits :: (Num a, FastBits a, Integral a) => a -> Word8

106+ selectBits x = fromIntegral $ case bo of

107+ BB -> mask cn $ x `fastShiftR` (n-cn)

108+ LB -> reverseBits cn $ mask cn $ x `fastShiftR` (n-cn)

109+ LL -> mask cn x

110+ BL -> reverseBits cn $ mask cn x

111+

112+ -- shift left at the correct position

113+ shl :: Word8 -> Word8

114+ shl x = case bo of

115+ BB -> x `fastShiftL` (8-o-cn)

116+ BL -> x `fastShiftL` (8-o-cn)

117+ LL -> x `fastShiftL` o

118+ LB -> x `fastShiftL` o

119+

120+ flush s2@(S b2 w2 o2 bo2)

121+ | o2 == 8 = S (b2 `mappend` B.singleton w2) 0 0 bo2

122+ | otherwise = s2

123+

124+putWordS# :: Int# -> Word# -> S -> S

125+putWordS# n w s@(S builder (W8# b) (I# o) bo) = s'

126+ where

127+ min# :: Int# -> Int# -> Int#

128+ min# x y | isTrue# (x <# y) = x

129+ min# _ y = y

130+

131+ -- number of bits that will be stored in the current byte

132+ cn = min# (8# -# o) n

133+

134+ -- new state

135+ s' = case n of

136+ 0# -> s

137+ _ -> putWordS# (n -# cn) w' (flush (S builder (W8# b') (I# (o +# cn)) bo))

138+

139+ -- new current byte

140+ b' = wordToWord8# (shl (selectBits w)) `orWord8#` b

141+

142+ -- Word containing the remaining (n-cn) bits to store in its LSB

143+ w' = case bo of

144+ BB -> w

145+ BL -> w `shiftRL#` cn

146+ LL -> w `shiftRL#` cn

147+ LB -> w

148+

149+ -- Select bits to store in the current byte.

150+ -- Put them in the correct order and return them in the least-significant

151+ -- bits of the returned value

152+ selectBits :: Word# -> Word#

153+ selectBits x = case bo of

154+ BB -> mask# cn (x `shiftRL#` (n -# cn))

155+ LB -> reverseBits# cn (mask# cn (x `shiftRL#` (n -# cn)))

156+ LL -> mask# cn x

157+ BL -> reverseBits# cn (mask# cn x)

158+

159+ -- shift left at the correct position

160+ shl :: Word# -> Word#

161+ shl x = case bo of

162+ BB -> x `shiftL#` (8# -# o -# cn)

163+ BL -> x `shiftL#` (8# -# o -# cn)

164+ LL -> x `shiftL#` o

165+ LB -> x `shiftL#` o

166+

167+ flush s2@(S b2 w2 o2 bo2)

168+ | o2 == 8 = S (b2 `mappend` B.singleton w2) 0 0 bo2

169+ | otherwise = s2

170+

171

66-- | Put the @n@ lower bits of a 'Word8'.

172-- | Put the @n@ lower bits of a 'Word8'.

67putWord8 :: Int -> Word8 -> BitPut ()

173putWord8 :: Int -> Word8 -> BitPut ()

68−putWord8 n w = BitPut $ \s -> PairS () $

174+putWord8 = putWord

69− let w' = make_mask n .&. w in

70− case s of

71− -- a whole word8, no offset

72− (S b t o) | n == 8 && o == 0 -> flush $ S b w n

73− -- less than a word8, will fit in the current word8

74− | n <= 8 - o -> flush $ S b (t .|. (w' `shiftL` (8 - n - o))) (o+n)

75− -- will finish this word8, and spill into the next one

76− | otherwise -> flush $

77− let o' = o + n - 8

78− b' = t .|. (w' `shiftR` o')

79− t' = w `shiftL` (8 - o')

80− in S (b `mappend` B.singleton b') t' o'

175

82-- | Put the @n@ lower bits of a 'Word16'.

176-- | Put the @n@ lower bits of a 'Word16'.

177+putWord16 :: Int -> Word16 -> BitPut ()

178+putWord16 = putWord

179+

83putWord16be :: Int -> Word16 -> BitPut ()

180putWord16be :: Int -> Word16 -> BitPut ()

84−putWord16be n w

181+putWord16be = putWord

85− | n <= 8 = putWord8 n (fromIntegral w)

182+{-# DEPRECATED putWord16be "Use 'putWord16' instead" #-}

86− | otherwise =

87− BitPut $ \s -> PairS () $

88− let w' = make_mask n .&. w in

89− case s of

90− -- as n>=9, it's too big to fit into one single byte

91− -- it'll either use 2 or 3 bytes

92− -- it'll fit in 2 bytes

93− (S b t o) | o + n <= 16 -> flush $

94− let o' = o + n - 8

95− b' = t .|. fromIntegral (w' `shiftR` o')

96− t' = fromIntegral (w `shiftL` (8-o'))

97− in (S (b `mappend` B.singleton b') t' o')

98− -- 3 bytes required

99− | otherwise -> flush $

100− let o' = o + n - 16

101− b' = t .|. fromIntegral (w' `shiftR` (o' + 8))

102− b'' = fromIntegral ((w `shiftR` o') .&. 0xff)

103− t' = fromIntegral (w `shiftL` (8-o'))

104− in (S (b `mappend` B.singleton b' `mappend` B.singleton b'') t' o')

105

183

106-- | Put the @n@ lower bits of a 'Word32'.

184-- | Put the @n@ lower bits of a 'Word32'.

185+putWord32 :: Int -> Word32 -> BitPut ()

186+putWord32 = putWord

187+

107putWord32be :: Int -> Word32 -> BitPut ()

188putWord32be :: Int -> Word32 -> BitPut ()

108−putWord32be n w

189+putWord32be = putWord

109− | n <= 16 = putWord16be n (fromIntegral w)

190+{-# DEPRECATED putWord32be "Use 'putWord32' instead" #-}

110− | otherwise = do

111− putWord32be (n-16) (w`shiftR`16)

112− putWord32be 16 (w .&. 0x0000ffff)

113

191

114-- | Put the @n@ lower bits of a 'Word64'.

192-- | Put the @n@ lower bits of a 'Word64'.

193+putWord64 :: Int -> Word64 -> BitPut ()

194+putWord64 = putWord

195+

115putWord64be :: Int -> Word64 -> BitPut ()

196putWord64be :: Int -> Word64 -> BitPut ()

116−putWord64be n w

197+putWord64be = putWord

117− | n <= 32 = putWord32be n (fromIntegral w)

198+{-# DEPRECATED putWord64be "Use 'putWord64' instead" #-}

118− | otherwise = do

119− putWord64be (n-32) (w`shiftR`32)

120− putWord64be 32 (w .&. 0xffffffff)

121

199

122-- | Put a 'ByteString'.

200-- | Put a 'ByteString'.

201+--

202+-- Examples: 3 bits are already written in the current byte

203+-- BB: ABCDEFGH IJKLMNOP -> xxxABCDE FGHIJKLM NOPxxxxx

204+-- LL: ABCDEFGH IJKLMNOP -> LMNOPxxx DEFGHIJK xxxxxABC

205+-- BL: ABCDEFGH IJKLMNOP -> xxxPONML KJIHGFED CBAxxxxx

206+-- LB: ABCDEFGH IJKLMNOP -> EDCBAxxx MLKJIHGF xxxxxPON

123putByteString :: ByteString -> BitPut ()

207putByteString :: ByteString -> BitPut ()

124−putByteString bs = do

208+putByteString bs = BitPut $ \s -> PairS () (putByteStringS bs s)

125− offset <- hasOffset

209+

126− if offset

210+putByteStringS :: ByteString -> S -> S

127− then mapM_ (putWord8 8) (unpack bs) -- naive

211+putByteStringS bs s

128− else joinPut (Put.putByteString bs)

212+ | BS.null bs = s

129− where

213+ | otherwise = case s of

130− hasOffset = BitPut $ \ s@(S _ _ o) -> PairS (o /= 0) s

214+ (S builder b 0 BB) -> S (builder `mappend` B.fromByteString bs) b 0 BB

215+ (S builder b 0 LL) -> S (builder `mappend` B.fromByteString (BS.reverse bs)) b 0 LL

216+ (S builder b 0 LB) -> S (builder `mappend` B.fromByteString (rev bs)) b 0 LB

217+ (S builder b 0 BL) -> S (builder `mappend` B.fromByteString (rev (BS.reverse bs))) b 0 BL

218+ (S _ _ _ BB) -> putByteStringS (BS.unsafeTail bs) (putWordS 8 (BS.unsafeHead bs) s)

219+ (S _ _ _ LL) -> putByteStringS (BS.unsafeInit bs) (putWordS 8 (BS.unsafeLast bs) s)

220+ (S _ _ _ BL) -> putByteStringS (BS.unsafeInit bs) (putWordS 8 (BS.unsafeLast bs) s)

221+ (S _ _ _ LB) -> putByteStringS (BS.unsafeTail bs) (putWordS 8 (BS.unsafeHead bs) s)

222+ where

223+ rev = BS.map (reverseBits 8)

224+

131

225

132-- | Run a 'Put' inside 'BitPut'. Any partially written bytes will be flushed

226-- | Run a 'Put' inside 'BitPut'. Any partially written bytes will be flushed

133-- before 'Put' executes to ensure byte alignment.

227-- before 'Put' executes to ensure byte alignment.

228+--

229+-- Warning: this method does not take bit order into account (i.e. BB assumed)

134joinPut :: Put -> BitPut ()

230joinPut :: Put -> BitPut ()

135joinPut m = BitPut $ \s0 -> PairS () $

231joinPut m = BitPut $ \s0 -> PairS () $

136− let (S b0 _ _) = flushIncomplete s0

232+ let (S b0 _ _ bo) = flushIncomplete s0

137 b = Put.execPut m

233 b = Put.execPut m

138− in (S (b0`mappend`b) 0 0)

234+ in (S (b0`mappend`b) 0 0 bo)

139−

140−flush :: S -> S

141−flush s@(S b w o)

142− | o > 8 = error "flush: offset > 8"

143− | o == 8 = S (b `mappend` B.singleton w) 0 0

144− | otherwise = s

145

235

146flushIncomplete :: S -> S

236flushIncomplete :: S -> S

147−flushIncomplete s@(S b w o)

237+flushIncomplete s@(S b w o bo)

148 | o == 0 = s

238 | o == 0 = s

149− | otherwise = (S (b `mappend` B.singleton w) 0 0)

239+ | otherwise = (S (b `mappend` B.singleton w) 0 0 bo)

240+

241+getOffset :: BitPut Int

242+getOffset = BitPut $ \s@(S _ _ o _) -> PairS o s

150

243

151-- | Run the 'BitPut' monad inside 'Put'.

244-- | Run the 'BitPut' monad inside 'Put'.

152runBitPut :: BitPut () -> Put.Put

245runBitPut :: BitPut () -> Put.Put

153runBitPut m = Put.putBuilder b

246runBitPut m = Put.putBuilder b

154 where

247 where

155− PairS _ s = run m (S mempty 0 0)

248+ PairS _ s = run m (S mempty 0 0 BB)

156− (S b _ _) = flushIncomplete s

249+ (S b _ _ _) = flushIncomplete s

157

250

158instance Functor BitPut where

251instance Functor BitPut where

159 fmap f (BitPut k) = BitPut $ \s ->

252 fmap f (BitPut k) = BitPut $ \s ->

@@ -173,3 +266,20 @@ instance Monad BitPut where

173 PairS b s'' = run (k a) s'

266 PairS b s'' = run (k a) s'

174 in PairS b s''

267 in PairS b s''

175 return x = BitPut $ \s -> PairS x s

268 return x = BitPut $ \s -> PairS x s

269+

270+instance BitOrderable BitPut where

271+ setBitOrder bo = BitPut $ \(S bu b o _) -> PairS () (S bu b o bo)

272+

273+ getBitOrder = BitPut $ \s@(S _ _ _ bo) -> PairS bo s

274+

275+instance Alignable BitPut where

276+ -- | Skip the given number of bits

277+ skipBits n

278+ | n <= 64 = putWord64 n 0

279+ | otherwise = putWord64 64 0 >> skipBits (n-64)

280+

281+ -- | Skip bits if necessary to align to the next byte

282+ alignByte = do

283+ o <- getOffset

284+ when (o /= 0) $

285+ skipBits (8-o)

binary-bits.cabal+6−2

@@ -1,6 +1,6 @@

1-- http://www.haskell.org/cabal/release/cabal-latest/doc/users-guide/

2name: binary-bits

3−version: 0.5.1

3+version: 0.6

4synopsis: Bit parsing/writing on top of binary.

5description: Bit parsing/writing on top of binary. Provides functions to

6 read and write bits to and from 8\/16\/32\/64 words.

@@ -24,7 +24,10 @@ library

25 exposed-modules: Data.Binary.Bits ,

26 Data.Binary.Bits.Put ,

27− Data.Binary.Bits.Get

27+ Data.Binary.Bits.Get ,

28+ Data.Binary.Bits.BitOrder ,

29+ Data.Binary.Bits.Alignment

30+ other-modules: Data.Binary.Bits.Internal

29 default-language: Haskell98

32 default-language: Haskell98

@@ -34,6 +37,7 @@ test-suite qc

34 type: exitcode-stdio-1.0

37 type: exitcode-stdio-1.0

35 main-is: BitsQC.hs

38 main-is: BitsQC.hs

36 default-language: Haskell98

39 default-language: Haskell98

40+ --ghc-options: -O2 -Wall

38 build-depends: base==4.*, binary >= 0.6.0.0, bytestring,

42 build-depends: base==4.*, binary >= 0.6.0.0, bytestring,

39 QuickCheck>=2, random,

43 QuickCheck>=2, random,

flake.locknew file+59

@@ -0,0 +1,59 @@

1+{

2+ "nodes": {

3+ "flake-utils": {

4+ "inputs": {

5+ "systems": "systems"

6+ },

7+ "locked": {

8+ "lastModified": 1731533236,

9+ "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",

10+ "owner": "numtide",

11+ "repo": "flake-utils",

12+ "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",

13+ "type": "github"

14+ },

15+ "original": {

16+ "id": "flake-utils",

17+ "type": "indirect"

18+ }

19+ },

20+ "nixpkgs": {

21+ "locked": {

22+ "lastModified": 1737469691,

23+ "narHash": "sha256-nmKOgAU48S41dTPIXAq0AHZSehWUn6ZPrUKijHAMmIk=",

24+ "owner": "NixOS",

25+ "repo": "nixpkgs",

26+ "rev": "9e4d5190a9482a1fb9d18adf0bdb83c6e506eaab",

27+ "type": "github"

28+ },

29+ "original": {

30+ "id": "nixpkgs",

31+ "ref": "nixos-unstable",

32+ "type": "indirect"

33+ }

34+ },

35+ "root": {

36+ "inputs": {

37+ "flake-utils": "flake-utils",

38+ "nixpkgs": "nixpkgs"

39+ }

40+ },

41+ "systems": {

42+ "locked": {

43+ "lastModified": 1681028828,

44+ "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",

45+ "owner": "nix-systems",

46+ "repo": "default",

47+ "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",

48+ "type": "github"

49+ },

50+ "original": {

51+ "owner": "nix-systems",

52+ "repo": "default",

53+ "type": "github"

54+ }

55+ }

56+ },

57+ "root": "root",

58+ "version": 7

59+}

flake.nixnew file+24

@@ -0,0 +1,24 @@

1+{

2+ inputs = {

3+ nixpkgs.url = "nixpkgs/nixos-unstable";

4+ flake-utils.url = "flake-utils";

5+ };

7+ outputs = { self, flake-utils, nixpkgs }:

8+ let

9+ supportedSystems =

10+ [ "x86_64-linux" "x86_64-darwin" "aarch64-darwin" "aarch64-linux" ];

11+ compilerVersion = "966";

12+ in flake-utils.lib.eachSystem supportedSystems (system:

13+ let pkgs = import nixpkgs { inherit system; };

14+ in {

15+ devShells.default = pkgs.mkShell {

16+ buildInputs = with pkgs; [

17+ haskell.compiler."ghc${compilerVersion}"

18+ (pkgs.haskell-language-server.override {

19+ supportedGhcVersions = [ compilerVersion ];

20+ })

21+ ];

22+ };

23+ });

24+}

stack.yamlnew file+66

@@ -0,0 +1,66 @@

1+# This file was automatically generated by 'stack init'

2+#

3+# Some commonly used options have been documented as comments in this file.

4+# For advanced use and comprehensive documentation of the format, please see:

5+# https://docs.haskellstack.org/en/stable/yaml_configuration/

7+# Resolver to choose a 'specific' stackage snapshot or a compiler version.

8+# A snapshot resolver dictates the compiler version and the set of packages

9+# to be used for project dependencies. For example:

10+#

11+# resolver: lts-3.5

12+# resolver: nightly-2015-09-21

13+# resolver: ghc-7.10.2

14+#

15+# The location of a snapshot can be provided as a file or url. Stack assumes

16+# a snapshot provided as a file might change, whereas a url resource does not.

17+#

18+# resolver: ./custom-snapshot.yaml

19+# resolver: https://example.com/snapshots/2018-01-01.yaml

20+resolver: lts-22.43

21+

22+# User packages to be built.

23+# Various formats can be used as shown in the example below.

24+#

25+# packages:

26+# - some-directory

27+# - https://example.com/foo/bar/baz-0.0.2.tar.gz

28+# subdirs:

29+# - auto-update

30+# - wai

31+packages:

32+- .

33+# Dependency packages to be pulled from upstream that are not in the resolver.

34+# These entries can reference officially published versions as well as

35+# forks / in-progress versions pinned to a git hash. For example:

36+#

37+# extra-deps:

38+# - acme-missiles-0.3

39+# - git: https://github.com/commercialhaskell/stack.git

40+# commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a

41+#

42+# extra-deps: []

43+

44+# Override default flag values for local packages and extra-deps

45+# flags: {}

46+

47+# Extra package databases containing global packages

48+# extra-package-dbs: []

49+

50+# Control whether we use the GHC we find on the path

51+# system-ghc: true

52+#

53+# Require a specific version of stack, using version ranges

54+# require-stack-version: -any # Default

55+# require-stack-version: ">=2.9"

56+#

57+# Override the architecture used by stack, especially useful on Windows

58+# arch: i386

59+# arch: x86_64

60+#

61+# Extra directories used by stack for building

62+# extra-include-dirs: [/path/to/dir]

63+# extra-lib-dirs: [/path/to/dir]

64+#

65+# Allow a newer minor version of GHC than the snapshot specifies

66+# compiler-check: newer-minor

stack.yaml.locknew file+12

@@ -0,0 +1,12 @@

1+# This file was autogenerated by Stack.

2+# You should not edit this file by hand.

3+# For more information, please see the documentation at:

4+# https://docs.haskellstack.org/en/stable/lock_files

6+packages: []

7+snapshots:

8+- completed:

9+ sha256: 08bd13ce621b41a8f5e51456b38d5b46d7783ce114a50ab604d6bbab0d002146

10+ size: 720271

11+ url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/22/43.yaml

12+ original: lts-22.43