quantities.
\begin{code}
+#include "MachDeps.h"
+
module Word
( Word8 -- all abstract.
, Word16 -- instances: Eq, Ord
, Word64 -- Integral, Ix, Enum,
-- Read, Show, Bits,
-- CCallable, CReturnable
- -- (last two
-
- , word8ToWord32 -- :: Word8 -> Word32
- , word32ToWord8 -- :: Word32 -> Word8
- , word16ToWord32 -- :: Word16 -> Word32
- , word32ToWord16 -- :: Word32 -> Word16
- , word8ToInt -- :: Word8 -> Int
- , intToWord8 -- :: Int -> Word8
- , word16ToInt -- :: Word16 -> Int
- , intToWord16 -- :: Int -> Word16
- , word32ToInt -- :: Word32 -> Int
- , intToWord32 -- :: Int -> Word32
+ -- (last two are GHC specific.)
+
+ , word8ToWord16 -- :: Word8 -> Word16
+ , word8ToWord32 -- :: Word8 -> Word32
+ , word8ToWord64 -- :: Word8 -> Word64
+
+ , word16ToWord8 -- :: Word16 -> Word32
+ , word16ToWord32 -- :: Word16 -> Word32
+ , word16ToWord64 -- :: Word8 -> Word64
+
+ , word32ToWord8 -- :: Word32 -> Word8
+ , word32ToWord16 -- :: Word32 -> Word16
+ , word32ToWord64 -- :: Word32 -> Word64
+
+ , word64ToWord8 -- :: Word64 -> Word8
+ , word64ToWord16 -- :: Word64 -> Word16
+ , word64ToWord32 -- :: Word64 -> Word32
+
+ , word8ToInt -- :: Word8 -> Int
+ , word16ToInt -- :: Word16 -> Int
+ , word32ToInt -- :: Word32 -> Int
+ , word64ToInt -- :: Word64 -> Int
+
+ , intToWord8 -- :: Int -> Word8
+ , intToWord16 -- :: Int -> Word16
+ , intToWord32 -- :: Int -> Word32
+ , intToWord64 -- :: Int -> Word64
+
+ , word8ToInteger -- :: Word8 -> Integer
+ , word16ToInteger -- :: Word16 -> Integer
+ , word32ToInteger -- :: Word32 -> Integer
+ , word64ToInteger -- :: Word64 -> Integer
+
+ , integerToWord8 -- :: Integer -> Word8
+ , integerToWord16 -- :: Integer -> Word16
+ , integerToWord32 -- :: Integer -> Word32
+ , integerToWord64 -- :: Integer -> Word64
+
+ -- NB! GHC SPECIFIC:
+ , wordToWord8 -- :: Word -> Word8
+ , wordToWord16 -- :: Word -> Word16
+ , wordToWord32 -- :: Word -> Word32
+ , wordToWord64 -- :: Word -> Word64
+
+ , word8ToWord -- :: Word8 -> Word
+ , word16ToWord -- :: Word16 -> Word
+ , word32ToWord -- :: Word32 -> Word
+ , word64ToWord -- :: Word64 -> Word
+
+ -- The "official" place to get these from is Addr.
+ , indexWord8OffAddr
+ , indexWord16OffAddr
+ , indexWord32OffAddr
+ , indexWord64OffAddr
+
+ , readWord8OffAddr
+ , readWord16OffAddr
+ , readWord32OffAddr
+ , readWord64OffAddr
+
+ , writeWord8OffAddr
+ , writeWord16OffAddr
+ , writeWord32OffAddr
+ , writeWord64OffAddr
+
+ , sizeofWord8
+ , sizeofWord16
+ , sizeofWord32
+ , sizeofWord64
+
+ -- The "official" place to get these from is Foreign
+#ifndef __PARALLEL_HASKELL__
+ , indexWord8OffForeignObj
+ , indexWord16OffForeignObj
+ , indexWord32OffForeignObj
+ , indexWord64OffForeignObj
+
+ , readWord8OffForeignObj
+ , readWord16OffForeignObj
+ , readWord32OffForeignObj
+ , readWord64OffForeignObj
+
+ , writeWord8OffForeignObj
+ , writeWord16OffForeignObj
+ , writeWord32OffForeignObj
+ , writeWord64OffForeignObj
+#endif
+
+ -- non-standard, GHC specific
+ , wordToInt
+
+ -- Internal, do not use.
+ , word8ToWord#
+ , word16ToWord#
+ , word32ToWord#
+
) where
+#ifdef __HUGS__
+import PreludeBuiltin
+#else
import PrelBase
-import PrelNum
-import PrelRead
+import CCall
+import PrelForeign
+import PrelIOBase
+import PrelAddr
+#endif
import Ix
import Bits
-import PrelGHC
-import CCall
+import Ratio
+import Numeric (readDec, showInt)
-----------------------------------------------------------------------------
-- The "official" coercion functions
-----------------------------------------------------------------------------
word8ToWord32 :: Word8 -> Word32
-word32ToWord8 :: Word32 -> Word8
word16ToWord32 :: Word16 -> Word32
+word32ToWord8 :: Word32 -> Word8
word32ToWord16 :: Word32 -> Word16
-word8ToInt :: Word8 -> Int
-intToWord8 :: Int -> Word8
-word16ToInt :: Word16 -> Int
-intToWord16 :: Int -> Word16
+word8ToInt :: Word8 -> Int
+word16ToInt :: Word16 -> Int
+intToWord8 :: Int -> Word8
+intToWord16 :: Int -> Word16
+
+integerToWord8 :: Integer -> Word8
+integerToWord16 :: Integer -> Word16
-word8ToInt = word32ToInt . word8ToWord32
-intToWord8 = word32ToWord8 . intToWord32
-word16ToInt = word32ToInt . word16ToWord32
-intToWord16 = word32ToWord16 . intToWord32
+word8ToInt = word32ToInt . word8ToWord32
+intToWord8 = word32ToWord8 . intToWord32
+word16ToInt = word32ToInt . word16ToWord32
+intToWord16 = word32ToWord16 . intToWord32
+word8ToInteger = word32ToInteger . word8ToWord32
+word16ToInteger = word32ToInteger . word16ToWord32
+integerToWord8 = fromInteger
+integerToWord16 = fromInteger
-intToWord32 (I# x) = W32# (int2Word# x)
+intToWord32 :: Int -> Word32
+intToWord32 (I# x) = W32# ((int2Word# x) `and#` (case (maxBound::Word32) of W32# x# -> x#))
+--intToWord32 (I# x) = W32# (int2Word# x)
+
+word32ToInt :: Word32 -> Int
word32ToInt (W32# x) = I# (word2Int# x)
+
+word32ToInteger :: Word32 -> Integer
+word32ToInteger (W32# x) = word2Integer x
+
+integerToWord32 :: Integer -> Word32
+integerToWord32 = fromInteger
+
+wordToInt :: Word -> Int
+wordToInt (W# w#) = I# (word2Int# w#)
+
\end{code}
\subsection[Word8]{The @Word8@ interface}
instance CReturnable Word8
word8ToWord32 (W8# x) = W32# x
+word8ToWord16 (W8# x) = W16# x
word32ToWord8 (W32# x) = W8# (wordToWord8# x)
-- mask out upper three bytes.
x' = word2Int# x
abs x = x
signum = signumReal
- fromInteger (J# a# s# d#) = W8# (intToWord8# (integer2Int# a# s# d#))
+ fromInteger (J# a# s# d#) = W8# (wordToWord8# (integer2Word# a# s# d#))
fromInt = intToWord8
instance Bounded Word8 where
-- Note: no need to mask results here
-- as they cannot overflow.
instance Integral Word8 where
- div (W8# x) (W8# y) = W8# (x `quotWord#` y)
- quot (W8# x) (W8# y) = W8# (x `quotWord#` y)
- rem (W8# x) (W8# y) = W8# (x `remWord#` y)
- mod (W8# x) (W8# y) = W8# (x `remWord#` y)
+ div x@(W8# x#) (W8# y#)
+ | y# `neWord#` (int2Word# 0#) = W8# (x# `quotWord#` y#)
+ | otherwise = divZeroError "div{Word8}" x
+
+ quot x@(W8# x#) (W8# y#)
+ | y# `neWord#` (int2Word# 0#) = W8# (x# `quotWord#` y#)
+ | otherwise = divZeroError "quot{Word8}" x
+
+ rem x@(W8# x#) (W8# y#)
+ | y# `neWord#` (int2Word# 0#) = W8# (x# `remWord#` y#)
+ | otherwise = divZeroError "rem{Word8}" x
+
+ mod x@(W8# x#) (W8# y#)
+ | y# `neWord#` (int2Word# 0#) = W8# (x# `remWord#` y#)
+ | otherwise = divZeroError "mod{Word8}" x
+
quotRem (W8# x) (W8# y) = (W8# (x `quotWord#` y), W8# (x `remWord#` y))
divMod (W8# x) (W8# y) = (W8# (x `quotWord#` y), W8# (x `remWord#` y))
- toInteger (W8# x) = word2Integer# x
+
+ toInteger (W8# x) = word2Integer x
toInt x = word8ToInt x
instance Ix Word8 where
range (m,n) = [m..n]
- index b@(m,n) i
+ index b@(m,_) i
| inRange b i = word8ToInt (i-m)
- | otherwise = error (showString "Ix{Word8}.index: Index " .
- showParen True (showsPrec 0 i) .
- showString " out of range " $
- showParen True (showsPrec 0 b) "")
+ | otherwise = indexError i b "Word8"
inRange (m,n) i = m <= i && i <= n
instance Enum Word8 where
- toEnum (I# i) = W8# (intToWord8# i)
+ succ w
+ | w == maxBound = succError "Word8"
+ | otherwise = w+1
+ pred w
+ | w == minBound = predError "Word8"
+ | otherwise = w-1
+
+ toEnum i@(I# i#)
+ | i >= toInt (minBound::Word8) && i <= toInt (maxBound::Word8)
+ = W8# (intToWord8# i#)
+ | otherwise
+ = toEnumError "Word8" i (minBound::Word8,maxBound::Word8)
+
fromEnum (W8# w) = I# (word2Int# w)
- enumFrom c = map toEnum [fromEnum c .. fromEnum (maxBound::Word8)]
- enumFromThen c d = map toEnum [fromEnum c, fromEnum d .. fromEnum (last::Word8)]
- where last = if d < c then minBound else maxBound
+ enumFrom c = map toEnum [fromEnum c .. fromEnum (maxBound::Word8)]
+ enumFromThen c d = map toEnum [fromEnum c, fromEnum d .. fromEnum last]
+ where
+ last :: Word8
+ last
+ | d < c = minBound
+ | otherwise = maxBound
instance Read Word8 where
- readsPrec p = readDec
+ readsPrec _ = readDec
instance Show Word8 where
- showsPrec p = showInt
+ showsPrec _ = showInt
--
-- Word8s are represented by an (unboxed) 32-bit Word.
pow2# :: Int# -> Int#
pow2# x# = word2Int# (shiftL# (int2Word# 1#) x#)
+word2Integer :: Word# -> Integer
+word2Integer w = case word2Integer# w of
+ (# a, s, d #) -> J# a s d
+
+pow2_64# :: Int# -> Int64#
+pow2_64# x# = word64ToInt64# (shiftL64# (wordToWord64# (int2Word# 1#)) x#)
+
+sizeofWord8 :: Word32
+sizeofWord8 = 1
+
\end{code}
\subsection[Word16]{The @Word16@ interface}
instance CReturnable Word16
word16ToWord32 (W16# x) = W32# x
+word16ToWord8 (W16# x) = W8# (wordToWord8# x)
word32ToWord16 (W32# x) = W16# (wordToWord16# x)
-- mask out upper 16 bits.
x' = word2Int# x
abs x = x
signum = signumReal
- fromInteger (J# a# s# d#) = W16# (intToWord16# (integer2Int# a# s# d#))
+ fromInteger (J# a# s# d#) = W16# (wordToWord16# (integer2Word# a# s# d#))
fromInt = intToWord16
instance Bounded Word16 where
toRational x = toInteger x % 1
instance Integral Word16 where
- div (W16# x) (W16# y) = W16# (x `quotWord#` y)
- quot (W16# x) (W16# y) = W16# (x `quotWord#` y)
- rem (W16# x) (W16# y) = W16# (x `remWord#` y)
- mod (W16# x) (W16# y) = W16# (x `remWord#` y)
+ div x@(W16# x#) (W16# y#)
+ | y# `neWord#` (int2Word# 0#) = W16# (x# `quotWord#` y#)
+ | otherwise = divZeroError "div{Word16}" x
+
+ quot x@(W16# x#) (W16# y#)
+ | y# `neWord#`(int2Word# 0#) = W16# (x# `quotWord#` y#)
+ | otherwise = divZeroError "quot{Word16}" x
+
+ rem x@(W16# x#) (W16# y#)
+ | y# `neWord#` (int2Word# 0#) = W16# (x# `remWord#` y#)
+ | otherwise = divZeroError "rem{Word16}" x
+
+ mod x@(W16# x#) (W16# y#)
+ | y# `neWord#` (int2Word# 0#) = W16# (x# `remWord#` y#)
+ | otherwise = divZeroError "mod{Word16}" x
+
quotRem (W16# x) (W16# y) = (W16# (x `quotWord#` y), W16# (x `remWord#` y))
divMod (W16# x) (W16# y) = (W16# (x `quotWord#` y), W16# (x `remWord#` y))
- toInteger (W16# x) = word2Integer# x
+
+ toInteger (W16# x) = word2Integer x
toInt x = word16ToInt x
instance Ix Word16 where
range (m,n) = [m..n]
- index b@(m,n) i
+ index b@(m,_) i
| inRange b i = word16ToInt (i - m)
- | otherwise = error (showString "Ix{Word16}.index: Index " .
- showParen True (showsPrec 0 i) .
- showString " out of range " $
- showParen True (showsPrec 0 b) "")
+ | otherwise = indexError i b "Word16"
inRange (m,n) i = m <= i && i <= n
instance Enum Word16 where
- toEnum (I# i) = W16# (intToWord16# i)
- fromEnum (W16# w) = I# (word2Int# w)
- enumFrom c = map toEnum [fromEnum c .. fromEnum (maxBound::Word16)]
- enumFromThen c d = map toEnum [fromEnum c, fromEnum d .. fromEnum (last::Word16)]
- where last = if d < c then minBound else maxBound
+ succ w
+ | w == maxBound = succError "Word16"
+ | otherwise = w+1
+ pred w
+ | w == minBound = predError "Word16"
+ | otherwise = w-1
+
+ toEnum i@(I# i#)
+ | i >= toInt (minBound::Word16) && i <= toInt (maxBound::Word16)
+ = W16# (intToWord16# i#)
+ | otherwise
+ = toEnumError "Word16" i (minBound::Word16,maxBound::Word16)
+
+ fromEnum (W16# w) = I# (word2Int# w)
+ enumFrom c = map toEnum [fromEnum c .. fromEnum (maxBound::Word16)]
+ enumFromThen c d = map toEnum [fromEnum c, fromEnum d .. fromEnum last]
+ where
+ last :: Word16
+ last
+ | d < c = minBound
+ | otherwise = maxBound
instance Read Word16 where
- readsPrec p = readDec
+ readsPrec _ = readDec
instance Show Word16 where
- showsPrec p = showInt
+ showsPrec _ = showInt
instance Bits Word16 where
(W16# x) .&. (W16# y) = W16# (x `and#` y)
bitSize _ = 16
isSigned _ = False
+
+sizeofWord16 :: Word32
+sizeofWord16 = 2
+
\end{code}
\subsection[Word32]{The @Word32@ interface}
\begin{code}
data Word32 = W32# Word#
+
instance CCallable Word32
instance CReturnable Word32
W32# (intToWord32# (word2Int# x -# word2Int# y))
(W32# x) * (W32# y) =
W32# (intToWord32# (word2Int# x *# word2Int# y))
-#if WORD_SIZE_IN_BYTES > 4
+#if WORD_SIZE_IN_BYTES == 8
negate w@(W32# x) =
if x' ==# 0#
then w
#endif
abs x = x
signum = signumReal
- fromInteger (J# a# s# d#) = W32# (intToWord32# (integer2Int# a# s# d#))
+ fromInteger (J# a# s# d#) = W32# (integer2Word# a# s# d#)
fromInt (I# x) = W32# (intToWord32# x)
-- ToDo: restrict fromInt{eger} range.
intToWord32# :: Int# -> Word#
wordToWord32# :: Word# -> Word#
-#if WORD_SIZE_IN_BYTES > 4
-intToWord32# i# = (int2Word# i#) `and#` (int2Word# 0xffffffff)
-wordToWord32# w# = w# `and#` (int2Word# 0xffffffff)
+#if WORD_SIZE_IN_BYTES == 8
+intToWord32# i# = (int2Word# i#) `and#` (int2Word# 0xffffffff#)
+wordToWord32# w# = w# `and#` (int2Word# 0xffffffff#)
+wordToWord64# w# = w#
#else
intToWord32# i# = int2Word# i#
wordToWord32# w# = w#
+
#endif
instance Bounded Word32 where
minBound = 0
-#if WORD_SIZE_IN_BYTES > 4
+#if WORD_SIZE_IN_BYTES == 8
maxBound = 0xffffffff
#else
maxBound = minBound - 1
toRational x = toInteger x % 1
instance Integral Word32 where
- div x y = quotWord32 x y
- quot x y = quotWord32 x y
- rem x y = remWord32 x y
- mod x y = remWord32 x y
+ div x y
+ | y /= 0 = quotWord32 x y
+ | otherwise = divZeroError "div{Word32}" x
+
+ quot x y
+ | y /= 0 = quotWord32 x y
+ | otherwise = divZeroError "quot{Word32}" x
+
+ rem x y
+ | y /= 0 = remWord32 x y
+ | otherwise = divZeroError "rem{Word32}" x
+
+ mod x y
+ | y /= 0 = remWord32 x y
+ | otherwise = divZeroError "mod{Word32}" x
+
quotRem a b = (a `quotWord32` b, a `remWord32` b)
divMod x y = quotRem x y
- toInteger (W32# x) = word2Integer# x
+
+ toInteger (W32# x) = word2Integer x
toInt (W32# x) = I# (word2Int# x)
{-# INLINE quotWord32 #-}
{-# INLINE remWord32 #-}
+remWord32, quotWord32 :: Word32 -> Word32 -> Word32
(W32# x) `quotWord32` (W32# y) = W32# (x `quotWord#` y)
(W32# x) `remWord32` (W32# y) = W32# (x `remWord#` y)
instance Ix Word32 where
range (m,n) = [m..n]
- index b@(m,n) i
+ index b@(m,_) i
| inRange b i = word32ToInt (i - m)
- | otherwise = error (showString "Ix{Word32}.index: Index " .
- showParen True (showsPrec 0 i) .
- showString " out of range " $
- showParen True (showsPrec 0 b) "")
+ | otherwise = indexError i b "Word32"
inRange (m,n) i = m <= i && i <= n
instance Enum Word32 where
- toEnum = intToWord32
- fromEnum = word32ToInt
- enumFrom c = map toEnum [fromEnum c .. fromEnum (maxBound::Word32)]
- enumFromThen c d = map toEnum [fromEnum c, fromEnum d .. fromEnum (last::Word32)]
- where last = if d < c then minBound else maxBound
+ succ w
+ | w == maxBound = succError "Word32"
+ | otherwise = w+1
+ pred w
+ | w == minBound = predError "Word32"
+ | otherwise = w-1
+
+ -- the toEnum/fromEnum will fail if the mapping isn't legal,
+ -- use the intTo* & *ToInt coercion functions to 'bypass' these range checks.
+ toEnum x
+ | x >= 0 = intToWord32 x
+ | otherwise
+ = toEnumError "Word32" x (minBound::Word32,maxBound::Word32)
+
+ fromEnum x
+ | x <= intToWord32 (maxBound::Int)
+ = word32ToInt x
+ | otherwise
+ = fromEnumError "Word32" x
+
+ enumFrom w = [w .. maxBound]
+ enumFromTo w1 w2
+ | w1 <= w2 = eftt32 True{-increasing-} w1 diff_f last
+ | otherwise = []
+ where
+ last = (> w2)
+ diff_f x = x + 1
+
+ enumFromThen w1 w2 = [w1,w2 .. last]
+ where
+ last :: Word32
+ last
+ | w1 <=w2 = maxBound
+ | otherwise = minBound
+
+ enumFromThenTo w1 w2 wend = eftt32 increasing w1 step_f last
+ where
+ increasing = w1 <= w2
+ diff1 = w2 - w1
+ diff2 = w1 - w2
+
+ last
+ | increasing = (> wend)
+ | otherwise = (< wend)
+
+ step_f
+ | increasing = \ x -> x + diff1
+ | otherwise = \ x -> x - diff2
+
+
+eftt32 :: Bool -> Word32 -> (Word32 -> Word32) -> (Word32-> Bool) -> [Word32]
+eftt32 increasing init stepper done = go init
+ where
+ go now
+ | done now = []
+ | increasing && now > nxt = [now] -- oflow
+ | not increasing && now < nxt = [now] -- uflow
+ | otherwise = now : go nxt
+ where
+ nxt = stepper now
+
instance Read Word32 where
- readsPrec p = readDec
+ readsPrec _ = readDec
instance Show Word32 where
- showsPrec p = showInt
+ showsPrec _ = showInt
instance Bits Word32 where
(W32# x) .&. (W32# y) = W32# (x `and#` y)
bitSize _ = 32
isSigned _ = False
+sizeofWord32 :: Word32
+sizeofWord32 = 4
\end{code}
\subsection[Word64]{The @Word64@ interface}
\begin{code}
-data Word64 = W64 {lo,hi::Word32} deriving (Eq, Ord, Bounded)
+#if WORD_SIZE_IN_BYTES == 8
+--data Word64 = W64# Word#
+
+word32ToWord64 :: Word32 -> Word64
+word32ToWord64 (W32 w#) = W64# w#
+
+word8ToWord64 :: Word8 -> Word64
+word8ToWord64 (W8# w#) = W64# w#
+
+word64ToWord8 :: Word64 -> Word8
+word64ToWord8 (W64# w#) = W8# (w# `and#` (int2Word# 0xff#))
+
+word16ToWord64 :: Word16 -> Word64
+word16ToWord64 (W16# w#) = W64# w#
+
+word64ToWord16 :: Word64 -> Word16
+word64ToWord16 (W64# w#) = W16# (w# `and#` (int2Word# 0xffff#))
+
+wordToWord32# :: Word# -> Word#
+wordToWord32# w# = w# `and#` (case (maxBound::Word32) of W# x# -> x#)
+
+word64ToWord32 :: Word64 -> Word32
+word64ToWord32 (W64# w#) = W32# (wordToWord32# w#)
+
+wordToWord64# w# = w#
+word64ToWord# w# = w#
+
+instance Eq Word64 where
+ (W64# x) == (W64# y) = x `eqWord#` y
+ (W64# x) /= (W64# y) = x `neWord#` y
+
+instance Ord Word64 where
+ compare (W64# x#) (W64# y#) = compareWord# x# y#
+ (<) (W64# x) (W64# y) = x `ltWord#` y
+ (<=) (W64# x) (W64# y) = x `leWord#` y
+ (>=) (W64# x) (W64# y) = x `geWord#` y
+ (>) (W64# x) (W64# y) = x `gtWord#` y
+ max x@(W64# x#) y@(W64# y#) =
+ case (compareWord# x# y#) of { LT -> y ; EQ -> x ; GT -> x }
+ min x@(W64# x#) y@(W64# y#) =
+ case (compareWord# x# y#) of { LT -> x ; EQ -> x ; GT -> y }
+
+instance Num Word64 where
+ (W64# x) + (W64# y) =
+ W64# (intToWord64# (word2Int# x +# word2Int# y))
+ (W64# x) - (W64# y) =
+ W64# (intToWord64# (word2Int# x -# word2Int# y))
+ (W64# x) * (W64# y) =
+ W64# (intToWord64# (word2Int# x *# word2Int# y))
+ negate w@(W64# x) =
+ if x' ==# 0#
+ then w
+ else W64# (int2Word# (0x100# -# x'))
+ where
+ x' = word2Int# x
+ abs x = x
+ signum = signumReal
+ fromInteger (J# a# s# d#) = W64# (integer2Word# a# s# d#)
+ fromInt = intToWord64
+
+-- Note: no need to mask results here
+-- as they cannot overflow.
+instance Integral Word64 where
+ div x@(W64# x#) (W64# y#)
+ | y# `neWord#` (int2Word# 0#) = W64# (x# `quotWord#` y#)
+ | otherwise = divZeroError "div{Word64}" x
+
+ quot x@(W64# x#) (W64# y#)
+ | y# `neWord#` (int2Word# 0#) = W64# (x# `quotWord#` y#)
+ | otherwise = divZeroError "quot{Word64}" x
+
+ rem x@(W64# x#) (W64# y#)
+ | y# `neWord#` (int2Word# 0#) = W64# (x# `remWord#` y#)
+ | otherwise = divZeroError "rem{Word64}" x
+
+ mod (W64# x) (W64# y)
+ | y# `neWord#` (int2Word# 0#) = W64# (x `remWord#` y)
+ | otherwise = divZeroError "mod{Word64}" x
+
+ quotRem (W64# x) (W64# y) = (W64# (x `quotWord#` y), W64# (x `remWord#` y))
+ divMod (W64# x) (W64# y) = (W64# (x `quotWord#` y), W64# (x `remWord#` y))
+
+ toInteger (W64# x) = word2Integer# x
+ toInt x = word64ToInt x
+
+
+instance Bits Word64 where
+ (W64# x) .&. (W64# y) = W64# (x `and#` y)
+ (W64# x) .|. (W64# y) = W64# (x `or#` y)
+ (W64# x) `xor` (W64# y) = W64# (x `xor#` y)
+ complement (W64# x) = W64# (x `xor#` (case (maxBound::Word64) of W64# x# -> x#))
+ shift (W64# x#) i@(I# i#)
+ | i > 0 = W64# (shiftL# x# i#)
+ | otherwise = W64# (shiftRL# x# (negateInt# i#))
+
+ w@(W64# x) `rotate` (I# i)
+ | i ==# 0# = w
+ | i ># 0# = W64# (shiftL# x i') `or#`
+ (shiftRL# (x `and#`
+ (int2Word# (word2Int# maxBound# -# pow2# i2 +# 1#)))
+ i2))
+ | otherwise = rotate w (I# (64# +# i))
+ where
+ i' = word2Int# (int2Word# i `and#` int2Word# 63#)
+ i2 = 64# -# i'
+ (W64# maxBound#) = maxBound
+
+ bit (I# i#)
+ | i# >=# 0# && i# <=# 63# = W64# (shiftL# (int2Word# 1#) i#)
+ | otherwise = 0 -- We'll be overbearing, for now..
+
+ setBit x i = x .|. bit i
+ clearBit x i = x .&. complement (bit i)
+ complementBit x i = x `xor` bit i
+
+ testBit (W64# x#) (I# i#)
+ | i# <# 64# && i# >=# 0# = (word2Int# (x# `and#` (shiftL# (int2Word# 1#) i#))) /=# 0#
+ | otherwise = False -- for now, this is really an error.
+
+ bitSize _ = 64
+ isSigned _ = False
+
+#else
+--defined in PrelCCall: data Word64 = W64 Word64# deriving (Eq, Ord, Bounded)
+
+-- for completeness sake
+word32ToWord64 :: Word32 -> Word64
+word32ToWord64 (W32# w#) = W64# (wordToWord64# w#)
+
+word64ToWord32 :: Word64 -> Word32
+word64ToWord32 (W64# w#) = W32# (word64ToWord# w#)
+
+word8ToWord64 :: Word8 -> Word64
+word8ToWord64 (W8# w#) = W64# (wordToWord64# w#)
+
+word64ToWord8 :: Word64 -> Word8
+word64ToWord8 (W64# w#) = W8# ((word64ToWord# w#) `and#` (int2Word# 0xff#))
+
+word16ToWord64 :: Word16 -> Word64
+word16ToWord64 (W16# w#) = W64# (wordToWord64# w#)
+
+word64ToWord16 :: Word64 -> Word16
+word64ToWord16 (W64# w#) = W16# ((word64ToWord# w#) `and#` (int2Word# 0xffff#))
-w64ToInteger W64{lo,hi} = toInteger lo + 0x100000000 * toInteger hi
-integerToW64 x = case x `quotRem` 0x100000000 of
- (h,l) -> W64{lo=fromInteger l, hi=fromInteger h}
+
+word64ToInteger :: Word64 -> Integer
+word64ToInteger (W64# w#) =
+ case word64ToInteger# w# of
+ (# a#, s#, p# #) -> J# a# s# p#
+
+word64ToInt :: Word64 -> Int
+word64ToInt w =
+ case w `quotRem` 0x100000000 of
+ (_,l) -> toInt (word64ToWord32 l)
+
+intToWord64# :: Int# -> Word64#
+intToWord64# i# = wordToWord64# (int2Word# i#)
+
+intToWord64 :: Int -> Word64
+intToWord64 (I# i#) = W64# (intToWord64# i#)
+
+integerToWord64 :: Integer -> Word64
+integerToWord64 (J# a# s# d#) = W64# (integerToWord64# a# s# d#)
+
+instance Eq Word64 where
+ (W64# x) == (W64# y) = x `eqWord64#` y
+ (W64# x) /= (W64# y) = not (x `eqWord64#` y)
+
+instance Ord Word64 where
+ compare (W64# x#) (W64# y#) = compareWord64# x# y#
+ (<) (W64# x) (W64# y) = x `ltWord64#` y
+ (<=) (W64# x) (W64# y) = x `leWord64#` y
+ (>=) (W64# x) (W64# y) = x `geWord64#` y
+ (>) (W64# x) (W64# y) = x `gtWord64#` y
+ max x@(W64# x#) y@(W64# y#) =
+ case (compareWord64# x# y#) of { LT -> y ; EQ -> x ; GT -> x }
+ min x@(W64# x#) y@(W64# y#) =
+ case (compareWord64# x# y#) of { LT -> x ; EQ -> x ; GT -> y }
+
+instance Num Word64 where
+ (W64# x) + (W64# y) =
+ W64# (int64ToWord64# (word64ToInt64# x `plusInt64#` word64ToInt64# y))
+ (W64# x) - (W64# y) =
+ W64# (int64ToWord64# (word64ToInt64# x `minusInt64#` word64ToInt64# y))
+ (W64# x) * (W64# y) =
+ W64# (int64ToWord64# (word64ToInt64# x `timesInt64#` word64ToInt64# y))
+ negate w
+ | w == 0 = w
+ | otherwise = maxBound - w
+
+ abs x = x
+ signum = signumReal
+ fromInteger i = integerToWord64 i
+ fromInt = intToWord64
+
+-- Note: no need to mask results here
+-- as they cannot overflow.
+-- ToDo: protect against div by zero.
+instance Integral Word64 where
+ div (W64# x) (W64# y) = W64# (x `quotWord64#` y)
+ quot (W64# x) (W64# y) = W64# (x `quotWord64#` y)
+ rem (W64# x) (W64# y) = W64# (x `remWord64#` y)
+ mod (W64# x) (W64# y) = W64# (x `remWord64#` y)
+ quotRem (W64# x) (W64# y) = (W64# (x `quotWord64#` y), W64# (x `remWord64#` y))
+ divMod (W64# x) (W64# y) = (W64# (x `quotWord64#` y), W64# (x `remWord64#` y))
+ toInteger w64 = word64ToInteger w64
+ toInt x = word64ToInt x
+
+
+instance Bits Word64 where
+ (W64# x) .&. (W64# y) = W64# (x `and64#` y)
+ (W64# x) .|. (W64# y) = W64# (x `or64#` y)
+ (W64# x) `xor` (W64# y) = W64# (x `xor64#` y)
+ complement (W64# x) = W64# (x `xor64#` (case (maxBound::Word64) of W64# x# -> x#))
+ shift (W64# x#) i@(I# i#)
+ | i > 0 = W64# (shiftL64# x# i#)
+ | otherwise = W64# (shiftRL64# x# (negateInt# i#))
+
+ w@(W64# x) `rotate` (I# i)
+ | i ==# 0# = w
+ | i ># 0# = W64# ((shiftL64# x i') `or64#`
+ (shiftRL64# (x `and64#`
+ (int64ToWord64# ((word64ToInt64# maxBound#) `minusInt64#`
+ (pow2_64# i2 `plusInt64#` (intToInt64# 1#))))))
+ i2)
+ | otherwise = rotate w (I# (64# +# i))
+ where
+ i' = word2Int# (int2Word# i `and#` int2Word# 63#)
+ i2 = 64# -# i'
+ (W64# maxBound#) = maxBound
+
+ bit (I# i#)
+ | i# >=# 0# && i# <=# 63# = W64# (shiftL64# (wordToWord64# (int2Word# 1#)) i#)
+ | otherwise = 0 -- We'll be overbearing, for now..
+
+ setBit x i = x .|. bit i
+ clearBit x i = x .&. complement (bit i)
+ complementBit x i = x `xor` bit i
+
+ testBit (W64# x#) (I# i#)
+ | i# <# 64# && i# >=# 0# = (word2Int# (word64ToWord# (x# `and64#` (shiftL64# (wordToWord64# (int2Word# 1#)) i#)))) /=# 0#
+ | otherwise = False -- for now, this is really an error.
+
+ bitSize _ = 64
+ isSigned _ = False
+
+compareWord64# :: Word64# -> Word64# -> Ordering
+compareWord64# i# j#
+ | i# `ltWord64#` j# = LT
+ | i# `eqWord64#` j# = EQ
+ | otherwise = GT
+
+-- Word64# primop wrappers:
+
+ltWord64# :: Word64# -> Word64# -> Bool
+ltWord64# x# y# = unsafePerformIO $ do
+ v <- _ccall_ stg_ltWord64 x# y#
+ case (v::Int) of
+ 0 -> return False
+ _ -> return True
+
+leWord64# :: Word64# -> Word64# -> Bool
+leWord64# x# y# = unsafePerformIO $ do
+ v <- _ccall_ stg_leWord64 x# y#
+ case (v::Int) of
+ 0 -> return False
+ _ -> return True
+
+eqWord64# :: Word64# -> Word64# -> Bool
+eqWord64# x# y# = unsafePerformIO $ do
+ v <- _ccall_ stg_eqWord64 x# y#
+ case (v::Int) of
+ 0 -> return False
+ _ -> return True
+
+neWord64# :: Word64# -> Word64# -> Bool
+neWord64# x# y# = unsafePerformIO $ do
+ v <- _ccall_ stg_neWord64 x# y#
+ case (v::Int) of
+ 0 -> return False
+ _ -> return True
+
+geWord64# :: Word64# -> Word64# -> Bool
+geWord64# x# y# = unsafePerformIO $ do
+ v <- _ccall_ stg_geWord64 x# y#
+ case (v::Int) of
+ 0 -> return False
+ _ -> return True
+
+gtWord64# :: Word64# -> Word64# -> Bool
+gtWord64# x# y# = unsafePerformIO $ do
+ v <- _ccall_ stg_gtWord64 x# y#
+ case (v::Int) of
+ 0 -> return False
+ _ -> return True
+
+plusInt64# :: Int64# -> Int64# -> Int64#
+plusInt64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_plusInt64 a# b#)) of
+ I64# i# -> i#
+
+minusInt64# :: Int64# -> Int64# -> Int64#
+minusInt64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_minusInt64 a# b#)) of
+ I64# i# -> i#
+
+timesInt64# :: Int64# -> Int64# -> Int64#
+timesInt64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_timesInt64 a# b#)) of
+ I64# i# -> i#
+
+quotWord64# :: Word64# -> Word64# -> Word64#
+quotWord64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_quotWord64 a# b#)) of
+ W64# w# -> w#
+
+remWord64# :: Word64# -> Word64# -> Word64#
+remWord64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_remWord64 a# b#)) of
+ W64# w# -> w#
+
+negateInt64# :: Int64# -> Int64#
+negateInt64# a# =
+ case (unsafePerformIO (_ccall_ stg_negateInt64 a#)) of
+ I64# i# -> i#
+
+and64# :: Word64# -> Word64# -> Word64#
+and64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_and64 a# b#)) of
+ W64# w# -> w#
+
+or64# :: Word64# -> Word64# -> Word64#
+or64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_or64 a# b#)) of
+ W64# w# -> w#
+
+xor64# :: Word64# -> Word64# -> Word64#
+xor64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_xor64 a# b#)) of
+ W64# w# -> w#
+
+not64# :: Word64# -> Word64#
+not64# a# =
+ case (unsafePerformIO (_ccall_ stg_not64 a#)) of
+ W64# w# -> w#
+
+shiftL64# :: Word64# -> Int# -> Word64#
+shiftL64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_shiftL64 a# b#)) of
+ W64# w# -> w#
+
+shiftRL64# :: Word64# -> Int# -> Word64#
+shiftRL64# a# b# =
+ case (unsafePerformIO (_ccall_ stg_shiftRL64 a# b#)) of
+ W64# w# -> w#
+
+word64ToWord# :: Word64# -> Word#
+word64ToWord# w64# =
+ case (unsafePerformIO (_ccall_ stg_word64ToWord w64#)) of
+ W# w# -> w#
+
+wordToWord64# :: Word# -> Word64#
+wordToWord64# w# =
+ case (unsafePerformIO (_ccall_ stg_wordToWord64 w#)) of
+ W64# w64# -> w64#
+
+word64ToInt64# :: Word64# -> Int64#
+word64ToInt64# w64# =
+ case (unsafePerformIO (_ccall_ stg_word64ToInt64 w64#)) of
+ I64# i# -> i#
+
+int64ToWord64# :: Int64# -> Word64#
+int64ToWord64# i64# =
+ case (unsafePerformIO (_ccall_ stg_int64ToWord64 i64#)) of
+ W64# w# -> w#
+
+intToInt64# :: Int# -> Int64#
+intToInt64# i# =
+ case (unsafePerformIO (_ccall_ stg_intToInt64 i#)) of
+ I64# i64# -> i64#
+
+#endif
+
+instance Enum Word64 where
+ succ w
+ | w == maxBound = succError "Word64"
+ | otherwise = w+1
+ pred w
+ | w == minBound = predError "Word64"
+ | otherwise = w-1
+
+ toEnum i
+ | i >= 0 = intToWord64 i
+ | otherwise
+ = toEnumError "Word64" i (minBound::Word64,maxBound::Word64)
+
+ fromEnum w
+ | w <= intToWord64 (maxBound::Int)
+ = word64ToInt w
+ | otherwise
+ = fromEnumError "Word64" w
+
+ enumFrom e1 = map integerToWord64 [word64ToInteger e1 .. word64ToInteger maxBound]
+ enumFromTo e1 e2 = map integerToWord64 [word64ToInteger e1 .. word64ToInteger e2]
+ enumFromThen e1 e2 = map integerToWord64 [word64ToInteger e1, word64ToInteger e2 .. word64ToInteger last]
+ where
+ last :: Word64
+ last
+ | e2 < e1 = minBound
+ | otherwise = maxBound
+
+ enumFromThenTo e1 e2 e3 = map integerToWord64 [word64ToInteger e1, word64ToInteger e2 .. word64ToInteger e3]
instance Show Word64 where
- showsPrec p x = showsPrec p (w64ToInteger x)
+ showsPrec p x = showsPrec p (word64ToInteger x)
instance Read Word64 where
- readsPrec p s = [ (integerToW64 x,r) | (x,r) <- readDec s ]
+ readsPrec _ s = [ (integerToWord64 x,r) | (x,r) <- readDec s ]
------------------------------------------------------------------------------
--- End of exported definitions
---
--- The remainder of this file consists of definitions which are only
--- used in the implementation.
------------------------------------------------------------------------------
+instance Ix Word64 where
+ range (m,n) = [m..n]
+ index b@(m,_) i
+ | inRange b i = word64ToInt (i-m)
+ | otherwise = indexError i b "Word64"
+ inRange (m,n) i = m <= i && i <= n
------------------------------------------------------------------------------
--- Code copied from the Prelude
------------------------------------------------------------------------------
+instance Bounded Word64 where
+ minBound = 0
+ maxBound = minBound - 1
+
+instance Real Word64 where
+ toRational x = toInteger x % 1
+
+sizeofWord64 :: Word32
+sizeofWord64 = 8
+
+\end{code}
+
+
+The Hugs-GHC extension libraries provide functions for going between
+Int and the various (un)signed ints. Here we provide the same for
+the GHC specific Word type:
+
+\begin{code}
+wordToWord8 :: Word -> Word8
+wordToWord16 :: Word -> Word16
+wordToWord32 :: Word -> Word32
+
+word8ToWord :: Word8 -> Word
+word16ToWord :: Word16 -> Word
+word32ToWord :: Word32 -> Word
+
+word8ToWord# :: Word8 -> Word#
+word16ToWord# :: Word16 -> Word#
+word32ToWord# :: Word32 -> Word#
+
+word8ToWord (W8# w#) = W# w#
+word8ToWord# (W8# w#) = w#
+
+wordToWord8 (W# w#) = W8# (w# `and#` (case (maxBound::Word8) of W8# x# -> x#))
+word16ToWord (W16# w#) = W# w#
+word16ToWord# (W16# w#) = w#
+
+wordToWord16 (W# w#) = W16# (w# `and#` (case (maxBound::Word16) of W16# x# -> x#))
+wordToWord32 (W# w#) = W32# (w# `and#` (case (maxBound::Word32) of W32# x# -> x#))
+
+word32ToWord (W32# w#) = W# w#
+word32ToWord# (W32# w#) = w#
+
+wordToWord64 :: Word -> Word64
+wordToWord64 (W# w#) = W64# (wordToWord64# w#)
+
+-- lossy on 32-bit platforms, but provided nontheless.
+word64ToWord :: Word64 -> Word
+word64ToWord (W64# w#) = W# (word64ToWord# w#)
+
+\end{code}
+
+
+--End of exported definitions
+
+The remainder of this file consists of definitions which are only
+used in the implementation.
+
+\begin{code}
+signumReal :: (Ord a, Num a) => a -> a
signumReal x | x == 0 = 0
| x > 0 = 1
| otherwise = -1
--- showInt is used for positive numbers only
--- stolen from Hugs prelude --SDM
-showInt :: Integral a => a -> ShowS
-showInt n r | n < 0 = error "Word.showInt: can't show negative numbers"
- | otherwise =
- let (n',d) = quotRem n 10
- r' = toEnum (fromEnum '0' + fromIntegral d) : r
- in if n' == 0 then r' else showInt n' r'
+\end{code}
+
+NOTE: the index is in units of the size of the type, *not* bytes.
+
+\begin{code}
+indexWord8OffAddr :: Addr -> Int -> Word8
+indexWord8OffAddr (A# a#) (I# i#) = intToWord8 (I# (ord# (indexCharOffAddr# a# i#)))
+
+indexWord16OffAddr :: Addr -> Int -> Word16
+indexWord16OffAddr a i =
+#ifdef WORDS_BIGENDIAN
+ intToWord16 ( word8ToInt l + (word8ToInt maxBound) * word8ToInt h)
+#else
+ intToWord16 ( word8ToInt h + (word8ToInt maxBound) * word8ToInt l)
+#endif
+ where
+ byte_idx = i * 2
+ l = indexWord8OffAddr a byte_idx
+ h = indexWord8OffAddr a (byte_idx+1)
+
+indexWord32OffAddr :: Addr -> Int -> Word32
+indexWord32OffAddr (A# a#) i = wordToWord32 (W# (indexWordOffAddr# a# i'#))
+ where
+ -- adjust index to be in Word units, not Word32 ones.
+ (I# i'#)
+#if WORD_SIZE_IN_BYTES==8
+ = i `div` 2
+#else
+ = i
+#endif
+
+indexWord64OffAddr :: Addr -> Int -> Word64
+indexWord64OffAddr (A# a#) (I# i#)
+#if WORD_SIZE_IN_BYTES==8
+ = W64# (indexWordOffAddr# a# i#)
+#else
+ = W64# (indexWord64OffAddr# a# i#)
+#endif
+
+#ifndef __PARALLEL_HASKELL__
+
+indexWord8OffForeignObj :: ForeignObj -> Int -> Word8
+indexWord8OffForeignObj (ForeignObj fo#) (I# i#) = intToWord8 (I# (ord# (indexCharOffForeignObj# fo# i#)))
+
+indexWord16OffForeignObj :: ForeignObj -> Int -> Word16
+indexWord16OffForeignObj fo i =
+#ifdef WORDS_BIGENDIAN
+ intToWord16 ( word8ToInt l + (word8ToInt maxBound) * word8ToInt h)
+#else
+ intToWord16 ( word8ToInt h + (word8ToInt maxBound) * word8ToInt l)
+#endif
+ where
+ byte_idx = i * 2
+ l = indexWord8OffForeignObj fo byte_idx
+ h = indexWord8OffForeignObj fo (byte_idx+1)
+
+indexWord32OffForeignObj :: ForeignObj -> Int -> Word32
+indexWord32OffForeignObj (ForeignObj fo#) i = wordToWord32 (W# (indexWordOffForeignObj# fo# i'#))
+ where
+ -- adjust index to be in Word units, not Word32 ones.
+ (I# i'#)
+#if WORD_SIZE_IN_BYTES==8
+ = i `div` 2
+#else
+ = i
+#endif
+
+indexWord64OffForeignObj :: ForeignObj -> Int -> Word64
+indexWord64OffForeignObj (ForeignObj fo#) (I# i#)
+#if WORD_SIZE_IN_BYTES==8
+ = W64# (indexWordOffForeignObj# fo# i#)
+#else
+ = W64# (indexWord64OffForeignObj# fo# i#)
+#endif
+#endif
+
+\end{code}
+
+Read words out of mutable memory:
+
+\begin{code}
+readWord8OffAddr :: Addr -> Int -> IO Word8
+readWord8OffAddr a i = _casm_ `` %r=(StgNat8)(((StgNat8*)%0)[(StgInt)%1]); '' a i
+
+readWord16OffAddr :: Addr -> Int -> IO Word16
+readWord16OffAddr a i = _casm_ `` %r=(StgNat16)(((StgNat16*)%0)[(StgInt)%1]); '' a i
+
+readWord32OffAddr :: Addr -> Int -> IO Word32
+readWord32OffAddr a i = _casm_ `` %r=(StgNat32)(((StgNat32*)%0)[(StgInt)%1]); '' a i
+
+readWord64OffAddr :: Addr -> Int -> IO Word64
+#if WORD_SIZE_IN_BYTES==8
+readWord64OffAddr a i = _casm_ `` %r=(StgWord)(((StgWord*)%0)[(StgInt)%1]); '' a i
+#else
+readWord64OffAddr a i = _casm_ `` %r=(StgNat64)(((StgNat64*)%0)[(StgInt)%1]); '' a i
+#endif
+
+#ifndef __PARALLEL_HASKELL__
+readWord8OffForeignObj :: ForeignObj -> Int -> IO Word8
+readWord8OffForeignObj fo i = _casm_ `` %r=(StgNat8)(((StgNat8*)%0)[(StgInt)%1]); '' fo i
+
+readWord16OffForeignObj :: ForeignObj -> Int -> IO Word16
+readWord16OffForeignObj fo i = _casm_ `` %r=(StgNat16)(((StgNat16*)%0)[(StgInt)%1]); '' fo i
+
+readWord32OffForeignObj :: ForeignObj -> Int -> IO Word32
+readWord32OffForeignObj fo i = _casm_ `` %r=(StgNat32)(((StgNat32*)%0)[(StgInt)%1]); '' fo i
+
+readWord64OffForeignObj :: ForeignObj -> Int -> IO Word64
+#if WORD_SIZE_IN_BYTES==8
+readWord64OffForeignObj fo i = _casm_ `` %r=(StgWord)(((StgWord*)%0)[(StgInt)%1]); '' fo i
+#else
+readWord64OffForeignObj fo i = _casm_ `` %r=(StgNat64)(((StgNat64*)%0)[(StgInt)%1]); '' fo i
+#endif
+
+#endif
+
+\end{code}
+
+Note: we provide primops for the writing via Addrs since that's used
+in the IO implementation (a place where we *really* do care about cycles.)
+
+\begin{code}
+writeWord8OffAddr :: Addr -> Int -> Word8 -> IO ()
+writeWord8OffAddr (A# a#) (I# i#) (W8# w#) = IO $ \ s# ->
+ case (writeCharOffAddr# a# i# (chr# (word2Int# w#)) s#) of s2# -> (# s2#, () #)
+
+writeWord16OffAddr :: Addr -> Int -> Word16 -> IO ()
+writeWord16OffAddr a i e = _casm_ `` (((StgNat16*)%0)[(StgInt)%1])=(StgNat16)%2; '' a i e
+
+writeWord32OffAddr :: Addr -> Int -> Word32 -> IO ()
+writeWord32OffAddr (A# a#) i (W32# w#) = IO $ \ s# ->
+ case (writeWordOffAddr# a# i'# w# s#) of s2# -> (# s2#, () #)
+ where
+ -- adjust index to be in Word units, not Word32 ones.
+ (I# i'#)
+#if WORD_SIZE_IN_BYTES==8
+ = i `div` 2
+#else
+ = i
+#endif
+
+writeWord64OffAddr :: Addr -> Int -> Word64 -> IO ()
+#if WORD_SIZE_IN_BYTES==8
+writeWord64OffAddr (A# a#) (I# i#) (W64# w#) = IO $ \ s# ->
+ case (writeWordOffAddr# a# i# w# s#) of s2# -> (# s2#, () #)
+#else
+writeWord64OffAddr (A# a#) (I# i#) (W64# w#) = IO $ \ s# ->
+ case (writeWord64OffAddr# a# i# w# s#) of s2# -> (# s2#, () #)
+#endif
+
+#ifndef __PARALLEL_HASKELL__
+
+writeWord8OffForeignObj :: ForeignObj -> Int -> Word8 -> IO ()
+writeWord8OffForeignObj fo i w = _casm_ `` (((StgNat16*)%0)[(StgInt)%1])=(StgNat16)%2; '' fo i w
+
+writeWord16OffForeignObj :: ForeignObj -> Int -> Word16 -> IO ()
+writeWord16OffForeignObj fo i w = _casm_ `` (((StgNat16*)%0)[(StgInt)%1])=(StgNat16)%2; '' fo i w
+
+writeWord32OffForeignObj :: ForeignObj -> Int -> Word32 -> IO ()
+writeWord32OffForeignObj fo i w = _casm_ `` (((StgNat16*)%0)[(StgInt)%1])=(StgNat16)%2; '' fo i' w
+ where
+ -- adjust index to be in Word units, not Word32 ones.
+ i'
+#if WORD_SIZE_IN_BYTES==8
+ = i `div` 2
+#else
+ = i
+#endif
+
+writeWord64OffForeignObj :: ForeignObj -> Int -> Word64 -> IO ()
+# if WORD_SIZE_IN_BYTES==8
+writeWord64OffForeignObj fo i e = _casm_ `` (((StgWord*)%0)[(StgInt)%1])=(StgWord)%2; '' fo i e
+# else
+writeWord64OffForeignObj fo i e = _casm_ `` (((StgNat64*)%0)[(StgInt)%1])=(StgNat64)%2; '' fo i e
+# endif
+
+#endif
+
+\end{code}
+
+Utils for generating friendly error messages.
+
+\begin{code}
+{-# NOINLINE indexError #-}
+indexError :: (Show a) => a -> (a,a) -> String -> b
+indexError i rng tp
+ = error (showString "Ix{" . showString tp . showString "}.index: Index " .
+ showParen True (showsPrec 0 i) .
+ showString " out of range " $
+ showParen True (showsPrec 0 rng) "")
+
+toEnumError :: (Show a,Show b) => String -> a -> (b,b) -> c
+toEnumError inst_ty tag bnds
+ = error ("Enum.toEnum{" ++ inst_ty ++ "}: tag " ++
+ (showParen True (showsPrec 0 tag) $
+ " is outside of bounds " ++
+ show bnds))
+
+fromEnumError :: (Show a,Show b) => String -> a -> b
+fromEnumError inst_ty tag
+ = error ("Enum.fromEnum{" ++ inst_ty ++ "}: value " ++
+ (showParen True (showsPrec 0 tag) $
+ " is outside of Int's bounds " ++
+ show (minBound::Int,maxBound::Int)))
+
+succError :: String -> a
+succError inst_ty
+ = error ("Enum.succ{" ++ inst_ty ++ "}: tried to take `succ' of maxBound")
+
+predError :: String -> a
+predError inst_ty
+ = error ("Enum.pred{" ++ inst_ty ++ "}: tried to take `pred' of minBound")
+
+divZeroError :: (Show a) => String -> a -> b
+divZeroError meth v
+ = error ("Integral." ++ meth ++ ": divide by 0 (" ++ show v ++ " / 0)")
\end{code}
projects / ghc-hetmet.git / blobdiff