| Copyright | (c) The University of Glasgow 2001 |
|---|---|
| License | BSD-style (see the file libraries/base/LICENSE) |
| Maintainer | libraries@haskell.org |
| Stability | stable |
| Portability | portable |
| Safe Haskell | Safe |
| Language | Haskell2010 |
Data.Word
Description
Unsigned integer types.
Synopsis
- data Word
- data Word8
- data Word16
- data Word32
- data Word64
- byteSwap16 :: Word16 -> Word16
- byteSwap32 :: Word32 -> Word32
- byteSwap64 :: Word64 -> Word64
- bitReverse8 :: Word8 -> Word8
- bitReverse16 :: Word16 -> Word16
- bitReverse32 :: Word32 -> Word32
- bitReverse64 :: Word64 -> Word64
Unsigned integral types
Instances
| PrintfArg Word Source # | Since: base-2.1 | ||||
Defined in Text.Printf | |||||
| Bits Word | @since base-2.01 | ||||
Defined in GHC.Internal.Bits Methods (.&.) :: Word -> Word -> Word Source # (.|.) :: Word -> Word -> Word Source # xor :: Word -> Word -> Word Source # complement :: Word -> Word Source # shift :: Word -> Int -> Word Source # rotate :: Word -> Int -> Word Source # setBit :: Word -> Int -> Word Source # clearBit :: Word -> Int -> Word Source # complementBit :: Word -> Int -> Word Source # testBit :: Word -> Int -> Bool Source # bitSizeMaybe :: Word -> Maybe Int Source # bitSize :: Word -> Int Source # isSigned :: Word -> Bool Source # shiftL :: Word -> Int -> Word Source # unsafeShiftL :: Word -> Int -> Word Source # shiftR :: Word -> Int -> Word Source # unsafeShiftR :: Word -> Int -> Word Source # rotateL :: Word -> Int -> Word Source # | |||||
| FiniteBits Word | @since base-4.6.0.0 | ||||
Defined in GHC.Internal.Bits Methods finiteBitSize :: Word -> Int Source # countLeadingZeros :: Word -> Int Source # countTrailingZeros :: Word -> Int Source # | |||||
| Data Word | @since base-4.0.0.0 | ||||
Defined in GHC.Internal.Data.Data Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Word -> c Word Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Word Source # toConstr :: Word -> Constr Source # dataTypeOf :: Word -> DataType Source # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Word) Source # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Word) Source # gmapT :: (forall b. Data b => b -> b) -> Word -> Word Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Word -> r Source # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Word -> r Source # gmapQ :: (forall d. Data d => d -> u) -> Word -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> Word -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Word -> m Word Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Word -> m Word Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Word -> m Word Source # | |||||
| Bounded Word | @since base-2.01 | ||||
| Enum Word | @since base-2.01 | ||||
| Storable Word | @since base-2.01 | ||||
Defined in GHC.Internal.Foreign.Storable Methods sizeOf :: Word -> Int Source # alignment :: Word -> Int Source # peekElemOff :: Ptr Word -> Int -> IO Word Source # pokeElemOff :: Ptr Word -> Int -> Word -> IO () Source # peekByteOff :: Ptr b -> Int -> IO Word Source # pokeByteOff :: Ptr b -> Int -> Word -> IO () Source # | |||||
| Ix Word | @since base-4.6.0.0 | ||||
Defined in GHC.Internal.Ix | |||||
| Num Word | @since base-2.01 | ||||
| Read Word | @since base-4.5.0.0 | ||||
| Integral Word | @since base-2.01 | ||||
Defined in GHC.Internal.Real | |||||
| Real Word | @since base-2.01 | ||||
Defined in GHC.Internal.Real Methods toRational :: Word -> Rational Source # | |||||
| Show Word | @since base-2.01 | ||||
| Eq Word | |||||
| Ord Word | |||||
| Generic1 (URec Word :: k -> Type) | |||||
Defined in GHC.Internal.Generics Associated Types
| |||||
| Foldable (UWord :: Type -> Type) | @since base-4.9.0.0 | ||||
Defined in GHC.Internal.Data.Foldable Methods fold :: Monoid m => UWord m -> m Source # foldMap :: Monoid m => (a -> m) -> UWord a -> m Source # foldMap' :: Monoid m => (a -> m) -> UWord a -> m Source # foldr :: (a -> b -> b) -> b -> UWord a -> b Source # foldr' :: (a -> b -> b) -> b -> UWord a -> b Source # foldl :: (b -> a -> b) -> b -> UWord a -> b Source # foldl' :: (b -> a -> b) -> b -> UWord a -> b Source # foldr1 :: (a -> a -> a) -> UWord a -> a Source # foldl1 :: (a -> a -> a) -> UWord a -> a Source # toList :: UWord a -> [a] Source # null :: UWord a -> Bool Source # length :: UWord a -> Int Source # elem :: Eq a => a -> UWord a -> Bool Source # maximum :: Ord a => UWord a -> a Source # minimum :: Ord a => UWord a -> a Source # | |||||
| Traversable (UWord :: Type -> Type) | @since base-4.9.0.0 | ||||
Defined in GHC.Internal.Data.Traversable | |||||
| Functor (URec Word :: Type -> Type) | @since base-4.9.0.0 | ||||
| Generic (URec Word p) | |||||
Defined in GHC.Internal.Generics Associated Types
| |||||
| Show (URec Word p) | @since base-4.9.0.0 | ||||
| Eq (URec Word p) | @since base-4.9.0.0 | ||||
| Ord (URec Word p) | @since base-4.9.0.0 | ||||
Defined in GHC.Internal.Generics Methods compare :: URec Word p -> URec Word p -> Ordering Source # (<) :: URec Word p -> URec Word p -> Bool Source # (<=) :: URec Word p -> URec Word p -> Bool Source # (>) :: URec Word p -> URec Word p -> Bool Source # (>=) :: URec Word p -> URec Word p -> Bool Source # | |||||
| data URec Word (p :: k) | Used for marking occurrences of @since base-4.9.0.0 | ||||
| type Rep1 (URec Word :: k -> Type) | @since base-4.9.0.0 | ||||
Defined in GHC.Internal.Generics | |||||
| type Rep (URec Word p) | @since base-4.9.0.0 | ||||
Defined in GHC.Internal.Generics | |||||
8-bit unsigned integer type
Instances
16-bit unsigned integer type
Instances
32-bit unsigned integer type
Instances
64-bit unsigned integer type
Instances
byte swapping
bit reversal
bitReverse16 :: Word16 -> Word16 Source #
Reverse the order of the bits in a Word16.
@since base-4.14.0.0
bitReverse32 :: Word32 -> Word32 Source #
Reverse the order of the bits in a Word32.
@since base-4.14.0.0
bitReverse64 :: Word64 -> Word64 Source #
Reverse the order of the bits in a Word64.
@since base-4.14.0.0
Notes
- All arithmetic is performed modulo 2^n, where n is the number of
bits in the type. One non-obvious consequence of this is that
negateshould not raise an error on negative arguments. - For coercing between any two integer types, use
fromIntegral, which is specialized for all the common cases so should be fast enough. Coercing word types to and from integer types preserves representation, not sign. - An unbounded size unsigned integer type is available with
Natural. - The rules that hold for
Enuminstances over a bounded type such asInt(see the section of the Haskell report dealing with arithmetic sequences) also hold for theEnuminstances over the variousWordtypes defined here. - Right and left shifts by amounts greater than or equal to the width
of the type result in a zero result. This is contrary to the
behaviour in C, which is undefined; a common interpretation is to
truncate the shift count to the width of the type, for example
1 << 32 == 1in some C implementations.