@@ -2,6 +2,9 @@
2{-# LANGUAGE DeriveDataTypeable #-}
2{-# LANGUAGE DeriveDataTypeable #-}
3{-# LANGUAGE TypeFamilies #-}
3{-# LANGUAGE TypeFamilies #-}
4{-# LANGUAGE ViewPatterns #-}
4{-# LANGUAGE ViewPatterns #-}
5+{-# LANGUAGE Unsafe #-}
6+{-# LANGUAGE DeriveLift #-}
7+{-# LANGUAGE StandaloneDeriving #-}
5{-# OPTIONS_HADDOCK hide #-}
8{-# OPTIONS_HADDOCK hide #-}
@@ -43,22 +46,15 @@ module Data.UUID.Types.Internal
44import Prelude hiding (null)
47import Prelude hiding (null)
46−import Control.Applicative ((<*>))
47import Control.DeepSeq (NFData (..))
49import Control.DeepSeq (NFData (..))
48import Control.Monad (guard, liftM2)
50import Control.Monad (guard, liftM2)
49import Data.Bits
51import Data.Bits
50import Data.Char
52import Data.Char
51−import Data.Functor ((<$>))
53+import Data.Data
52import Data.Hashable
54import Data.Hashable
53import Data.List (elemIndices)
55import Data.List (elemIndices)
54import Foreign.Ptr (Ptr)
56import Foreign.Ptr (Ptr)
56−#if MIN_VERSION_base(4,0,0)
59−import Data.Generics.Basics
62import Foreign.Storable
58import Foreign.Storable
64import Data.Binary
60import Data.Binary
@@ -69,19 +65,19 @@ import qualified Data.ByteString.Internal as BI
69import qualified Data.ByteString.Lazy as BL
65import qualified Data.ByteString.Lazy as BL
70import qualified Data.ByteString.Unsafe as BU
66import qualified Data.ByteString.Unsafe as BU
71import Data.Text (Text)
67import Data.Text (Text)
72−import qualified Data.Text as T
68+import qualified Data.Text.Encoding as T
74import Data.UUID.Types.Internal.Builder
70import Data.UUID.Types.Internal.Builder
76−import System.Random
72+import System.Random (Random (..), uniform)
73+import System.Random.Stateful (Uniform (..), uniformWord64)
75+import Language.Haskell.TH.Syntax (Lift)
79−-- |The UUID type. A 'Random' instance is provided which produces
77+-- | Type representing <https://en.wikipedia.org/wiki/UUID Universally Unique Identifiers (UUID)> as specified in
80−-- insecure version 4 UUIDs as specified in <http://tools.ietf.org/html/rfc4122 RFC 4122>. The 'Storable' and
81−-- 'Binary' instances are compatible with <http://tools.ietf.org/html/rfc4122 RFC 4122>, storing the fields in
78+-- <http://tools.ietf.org/html/rfc4122 RFC 4122>.
82−-- network order as 16 bytes.
83data UUID = UUID {-# UNPACK #-} !Word64 {-# UNPACK #-} !Word64
79data UUID = UUID {-# UNPACK #-} !Word64 {-# UNPACK #-} !Word64
84− deriving (Eq, Ord, Typeable)
80+ deriving (Eq, Ord)
86 Prior to uuid-types-1.0.4:
82 Prior to uuid-types-1.0.4:
87 !Word32 !Word32 !Word32 !Word32
83 !Word32 !Word32 !Word32 !Word32
@@ -100,6 +96,9 @@ data UUID = UUID {-# UNPACK #-} !Word64 {-# UNPACK #-} !Word64
100-- Useful for when you need to serialize a UUID and
96-- Useful for when you need to serialize a UUID and
101-- neither 'Storable' nor 'Binary' are appropriate.
97-- neither 'Storable' nor 'Binary' are appropriate.
99+-- >>> toWords <$> fromString "550e8400-e29b-41d4-a716-446655440000"
100+-- Just (1427014656,3801825748,2803254374,1430519808)
103-- See also 'toWords64'.
102-- See also 'toWords64'.
105-- /Since: @uuid-1.2.2@/
104-- /Since: @uuid-1.2.2@/
@@ -127,6 +126,9 @@ fromWords w1 w2 w3 w4 = UUID (w32to64 w1 w2) (w32to64 w3 w4)
128-- | Convert a 'UUID' into a pair of 'Word64's.
127-- | Convert a 'UUID' into a pair of 'Word64's.
129+-- >>> toWords64 <$> fromString "550e8400-e29b-41d4-a716-446655440000"
130+-- Just (6128981282234515924,12039885860129472512)
130-- See also 'toWords'.
132-- See also 'toWords'.
132-- @since 1.0.4
134-- @since 1.0.4
@@ -193,10 +195,10 @@ pack unpacked =
194-- |Build a Word32 from four Word8 values, presented in big-endian order
196-- |Build a Word32 from four Word8 values, presented in big-endian order
195word :: Word8 -> Word8 -> Word8 -> Word8 -> Word32
197word :: Word8 -> Word8 -> Word8 -> Word8 -> Word32
196−word a b c d = (fromIntegral a `shiftL` 24)
198+word a b c d = (fromIntegral a `unsafeShiftL` 24)
197− .|. (fromIntegral b `shiftL` 16)
199+ .|. (fromIntegral b `unsafeShiftL` 16)
198− .|. (fromIntegral c `shiftL` 8)
200+ .|. (fromIntegral c `unsafeShiftL` 8)
199− .|. (fromIntegral d )
201+ .|. (fromIntegral d )
201-- |Extract a Word8 from a Word64. Bytes, high to low, are numbered from 7 to 0,
203-- |Extract a Word8 from a Word64. Bytes, high to low, are numbered from 7 to 0,
202byte :: Int -> Word64 -> Word8
204byte :: Int -> Word64 -> Word8
@@ -205,7 +207,7 @@ byte i w = fromIntegral (w `shiftR` (i * 8))
205-- |Build a Word16 from two Word8 values, presented in big-endian order.
207-- |Build a Word16 from two Word8 values, presented in big-endian order.
206w8to16 :: Word8 -> Word8 -> Word16
208w8to16 :: Word8 -> Word8 -> Word16
207w8to16 w0s w1s =
209w8to16 w0s w1s =
208− (w0 `shiftL` 8) .|. w1
210+ (w0 `unsafeShiftL` 8) .|. w1
210 w0 = fromIntegral w0s
212 w0 = fromIntegral w0s
211 w1 = fromIntegral w1s
213 w1 = fromIntegral w1s
@@ -239,7 +241,7 @@ buildFromBytes v b0 b1 b2 b3 b4 b5 b6 b7 b8 b9 ba bb bc bd be bf =
239 where b6' = b6 .&. 0x0f .|. (v `shiftL` 4)
241 where b6' = b6 .&. 0x0f .|. (v `shiftL` 4)
240 b8' = b8 .&. 0x3f .|. 0x80
242 b8' = b8 .&. 0x3f .|. 0x80
242−-- |Build a UUID of a given version from Word32 values.
244+-- |Build a UUID of a given version from 'Word32' values.
243buildFromWords :: Word8 -> Word32 -> Word32 -> Word32 -> Word32 -> UUID
245buildFromWords :: Word8 -> Word32 -> Word32 -> Word32 -> Word32 -> UUID
244buildFromWords v w0 w1 w2 w3 = fromWords w0 w1' w2' w3
246buildFromWords v w0 w1 w2 w3 = fromWords w0 w1' w2' w3
245 where w1' = w1 .&. 0xffff0fff .|. ((fromIntegral v) `shiftL` 12)
247 where w1' = w1 .&. 0xffff0fff .|. ((fromIntegral v) `shiftL` 12)
@@ -273,8 +275,8 @@ null = (== nil)
273 -- null (UUID 0 0 0 0) = True
275 -- null (UUID 0 0 0 0) = True
274 -- null _ = False
276 -- null _ = False
276−-- |The nil UUID, as defined in <http://tools.ietf.org/html/rfc4122 RFC 4122>.
278+-- |The 'nil' UUID, as defined in <http://tools.ietf.org/html/rfc4122 RFC 4122>.
277−-- It is a UUID of all zeros. @'null' u@ iff @'u' == 'nil'@.
279+-- It is a UUID of all zeros. @'null' u@ /iff/ @'u' == 'nil'@.
278nil :: UUID
280nil :: UUID
279nil = UUID 0 0
281nil = UUID 0 0
@@ -284,6 +286,8 @@ fromByteString :: BL.ByteString -> Maybe UUID
284fromByteString = fromList . BL.unpack
286fromByteString = fromList . BL.unpack
286-- |Encode a UUID into a 'ByteString' in network order.
288-- |Encode a UUID into a 'ByteString' in network order.
290+-- This uses the same encoding as the 'Binary' instance.
287toByteString :: UUID -> BL.ByteString
291toByteString :: UUID -> BL.ByteString
288toByteString = BL.pack . toList
292toByteString = BL.pack . toList
@@ -291,9 +295,8 @@ toByteString = BL.pack . toList
291-- The hyphens may not be omitted.
295-- The hyphens may not be omitted.
292-- Example:
296-- Example:
295−-- fromString \"c2cc10e1-57d6-4b6f-9899-38d972112d8c\"
298+-- >>> fromString "c2cc10e1-57d6-4b6f-9899-38d972112d8c"
296−-- @
299+-- Just c2cc10e1-57d6-4b6f-9899-38d972112d8c
298-- Hex digits may be upper or lower-case.
301-- Hex digits may be upper or lower-case.
299fromString :: String -> Maybe UUID
302fromString :: String -> Maybe UUID
@@ -325,32 +328,39 @@ fromString' s0 = do
325-- | Convert a UUID into a hypenated string using lower-case letters.
328-- | Convert a UUID into a hypenated string using lower-case letters.
326-- Example:
329-- Example:
329−-- toString \<$\> fromString \"550e8400-e29b-41d4-a716-446655440000\"
331+-- >>> toString <$> fromString "550e8400-e29b-41d4-a716-446655440000"
330−-- @
332+-- Just "550e8400-e29b-41d4-a716-446655440000"
331toString :: UUID -> String
335toString :: UUID -> String
332−toString uuid = hexw w0 $ hexw' w1 $ hexw' w2 $ hexw w3 ""
336+toString uuid = hexw0 w0 $ hexw1 w1 ""
333− where hexw :: Word32 -> String -> String
337+ where hexw0 :: Word64 -> String -> String
338+ hexw0 w s = hexn w 60 : hexn w 56 : hexn w 52 : hexn w 48
339+ : hexn w 44 : hexn w 40 : hexn w 36 : hexn w 32
334− hexw w s = hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
340+ : '-' : hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
335− : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0 : s
341+ : '-' : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0
337− hexw' :: Word32 -> String -> String
344+ hexw1 :: Word64 -> String -> String
338− hexw' w s = '-' : hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
345+ hexw1 w s = '-' : hexn w 60 : hexn w 56 : hexn w 52 : hexn w 48
346+ : '-' : hexn w 44 : hexn w 40 : hexn w 36 : hexn w 32
347+ : hexn w 28 : hexn w 24 : hexn w 20 : hexn w 16
339− : '-' : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0 : s
348+ : hexn w 12 : hexn w 8 : hexn w 4 : hexn w 0
341− hexn :: Word32 -> Int -> Char
351+ hexn :: Word64 -> Int -> Char
342 hexn w r = intToDigit $ fromIntegral ((w `shiftR` r) .&. 0xf)
352 hexn w r = intToDigit $ fromIntegral ((w `shiftR` r) .&. 0xf)
344− (w0,w1,w2,w3) = toWords uuid
354+ (w0,w1) = toWords64 uuid
346-- | If the passed in `Text` can be parsed as an ASCII representation of
356-- | If the passed in `Text` can be parsed as an ASCII representation of
347-- a `UUID`, it will be. The hyphens may not be omitted.
357-- a `UUID`, it will be. The hyphens may not be omitted.
348fromText :: Text -> Maybe UUID
358fromText :: Text -> Maybe UUID
349−fromText = fromString . T.unpack
359+fromText = fromASCIIBytes . T.encodeUtf8
351-- | Convert a UUID into a hyphentated string using lower-case letters.
361-- | Convert a UUID into a hyphentated string using lower-case letters.
352toText :: UUID -> Text
362toText :: UUID -> Text
353−toText = T.pack . toString
363+toText = T.decodeLatin1 . toASCIIBytes
355-- | Convert a UUID into a hyphentated string using lower-case letters, packed
365-- | Convert a UUID into a hyphentated string using lower-case letters, packed
356-- as ASCII bytes into `B.ByteString`.
366-- as ASCII bytes into `B.ByteString`.
@@ -445,49 +455,30 @@ fromASCIIBytes bs = do
445-- | Similar to `toASCIIBytes` except we produce a lazy `BL.ByteString`.
455-- | Similar to `toASCIIBytes` except we produce a lazy `BL.ByteString`.
446toLazyASCIIBytes :: UUID -> BL.ByteString
456toLazyASCIIBytes :: UUID -> BL.ByteString
447toLazyASCIIBytes =
457toLazyASCIIBytes =
448−#if MIN_VERSION_bytestring(0,10,0)
449 BL.fromStrict
458 BL.fromStrict
451− BL.fromChunks . return
453 . toASCIIBytes
459 . toASCIIBytes
455-- | Similar to `fromASCIIBytes` except parses from a lazy `BL.ByteString`.
461-- | Similar to `fromASCIIBytes` except parses from a lazy `BL.ByteString`.
456fromLazyASCIIBytes :: BL.ByteString -> Maybe UUID
462fromLazyASCIIBytes :: BL.ByteString -> Maybe UUID
457fromLazyASCIIBytes bs =
463fromLazyASCIIBytes bs =
458− if BL.length bs == 36 then fromASCIIBytes (
464+ if BL.length bs == 36 then fromASCIIBytes (BL.toStrict bs) else Nothing
459−#if MIN_VERSION_bytestring(0,10,0)
462− B.concat $ BL.toChunks bs
467-- Class Instances
467-- Class Instances
470+-- | This 'Random' instance produces __insecure__ version 4 UUIDs as
471+-- specified in <http://tools.ietf.org/html/rfc4122 RFC 4122>.
470instance Random UUID where
472instance Random UUID where
471− random g = (fromGenNext w0 w1 w2 w3 w4, g4)
473+ random = uniform
472− where (w0, g0) = next g
477 randomR _ = random -- range is ignored
474 randomR _ = random -- range is ignored
479−-- |Build a UUID from the results of five calls to next on a StdGen.
476+-- @since 1.0.4
480−-- While next on StdGet returns an Int, it doesn't provide 32 bits of
477+instance Uniform UUID where
481−-- randomness. This code relies on at last 28 bits of randomness in the
478+ uniformM gen = do
482−-- and optimizes its use so as to make only five random values, not six.
479+ w0 <- uniformWord64 gen
483−fromGenNext :: Int -> Int -> Int -> Int -> Int -> UUID
480+ w1 <- uniformWord64 gen
484−fromGenNext w0 w1 w2 w3 w4 =
485− buildFromBytes 4 /-/ (ThreeByte w0)
481+ pure $ buildFromBytes 4 /-/ w0 /-/ w1
487− /-/ w2 -- use all 4 bytes because we know the version
488− -- field will "cover" the upper, non-random bits
492-- |A ByteSource to extract only three bytes from an Int, since next on StdGet
483-- |A ByteSource to extract only three bytes from an Int, since next on StdGet
493-- only returns 31 bits of randomness.
484-- only returns 31 bits of randomness.
@@ -495,8 +486,8 @@ type instance ByteSink ThreeByte g = Takes3Bytes g
495newtype ThreeByte = ThreeByte Int
486newtype ThreeByte = ThreeByte Int
496instance ByteSource ThreeByte where
487instance ByteSource ThreeByte where
497 f /-/ (ThreeByte w) = f b1 b2 b3
488 f /-/ (ThreeByte w) = f b1 b2 b3
498− where b1 = fromIntegral (w `shiftR` 16)
489+ where b1 = fromIntegral (w `unsafeShiftR` 16)
499− b2 = fromIntegral (w `shiftR` 8)
490+ b2 = fromIntegral (w `unsafeShiftR` 8)
500 b3 = fromIntegral w
491 b3 = fromIntegral w
502instance NFData UUID where
493instance NFData UUID where
@@ -513,6 +504,11 @@ instance Hashable UUID where
513 `hashWithSalt` w2
504 `hashWithSalt` w2
514 `hashWithSalt` w3
505 `hashWithSalt` w3
507+-- | Pretty prints a 'UUID' (without quotation marks). See also 'toString'.
510+-- "00000000-0000-0000-0000-000000000000"
516instance Show UUID where
512instance Show UUID where
517 show = toString
513 show = toString
@@ -523,7 +519,7 @@ instance Read UUID where
523 Nothing -> []
519 Nothing -> []
524 Just u -> [(u,drop 36 noSpaces)]
520 Just u -> [(u,drop 36 noSpaces)]
526−
522+-- | This 'Storable' instance uses the memory layout as described in <http://tools.ietf.org/html/rfc4122 RFC 4122>, but in contrast to the 'Binary' instance, __the fields are stored in host byte order__.
527instance Storable UUID where
523instance Storable UUID where
528 sizeOf _ = 16
524 sizeOf _ = 16
529 alignment _ = 4
525 alignment _ = 4
@@ -560,6 +556,7 @@ instance Storable UUID where
560 pokeByteOff p (off+14) x9
556 pokeByteOff p (off+14) x9
561 pokeByteOff p (off+15) x10
557 pokeByteOff p (off+15) x10
559+-- | This 'Binary' instance is compatible with <http://tools.ietf.org/html/rfc4122 RFC 4122>, storing the fields in network order as 16 bytes.
563instance Binary UUID where
560instance Binary UUID where
564 put (UUID w0 w1) = putWord64be w0 >> putWord64be w1
561 put (UUID w0 w1) = putWord64be w0 >> putWord64be w1
565 get = liftM2 UUID getWord64be getWord64be
562 get = liftM2 UUID getWord64be getWord64be
@@ -575,13 +572,4 @@ instance Data UUID where
575uuidType :: DataType
572uuidType :: DataType
576uuidType = mkNoRepType "Data.UUID.Types.UUID"
573uuidType = mkNoRepType "Data.UUID.Types.UUID"
578−#if !(MIN_VERSION_base(4,2,0))
575+deriving instance Lift UUID
579−mkNoRepType :: String -> DataType
580−mkNoRepType = mkNorepType
583−#if !MIN_VERSION_base(4,5,0)
584−unsafeShiftR, unsafeShiftL :: Word64 -> Int -> Word64
585−unsafeShiftR = shiftR
586−unsafeShiftL = shiftL