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|
{-# LANGUAGE UnboxedTuples, MagicHash, CPP, DeriveDataTypeable #-}
-- |
-- Module : Data.Primitive.Types
-- Copyright : (c) Roman Leshchinskiy 2009-2010
-- License : BSD-style
--
-- Maintainer : Roman Leshchinskiy <rl@cse.unsw.edu.au>
-- Portability : non-portable
--
-- Basic types and classes for primitive array operations
--
module Data.Primitive.Types (
Prim(..),
Addr(..),
) where
import Control.Monad.Primitive
import Data.Primitive.MachDeps
import GHC.Base (
Int(..), Char(..),
)
import GHC.Float (
Float(..), Double(..)
)
import GHC.Word (
Word(..), Word8(..), Word16(..), Word32(..), Word64(..)
)
import GHC.Int (
Int8(..), Int16(..), Int32(..), Int64(..)
)
import GHC.Prim
import Data.Typeable ( Typeable )
import Data.Data ( Data(..), mkNorepType )
-- | A machine address
data Addr = Addr Addr# deriving ( Typeable )
instance Eq Addr where
Addr a# == Addr b# = eqAddr# a# b#
Addr a# /= Addr b# = neAddr# a# b#
instance Ord Addr where
Addr a# > Addr b# = gtAddr# a# b#
Addr a# >= Addr b# = geAddr# a# b#
Addr a# < Addr b# = ltAddr# a# b#
Addr a# <= Addr b# = leAddr# a# b#
instance Data Addr where
toConstr _ = error "toConstr"
gunfold _ _ = error "gunfold"
dataTypeOf _ = mkNorepType "Data.Primitive.Types.Addr"
-- | Class of types supporting primitive array operations
class Prim a where
-- | Size of values of type @a@. The argument is not used.
sizeOf# :: a -> Int#
-- | Alignment of values of type @a@. The argument is not used.
alignment# :: a -> Int#
-- | Read a value from the array. The offset is in elements of type
-- @a@ rather than in bytes.
indexByteArray# :: ByteArray# -> Int# -> a
-- | Read a value from the mutable array. The offset is in elements of type
-- @a@ rather than in bytes.
readByteArray# :: MutableByteArray# s -> Int# -> State# s -> (# State# s, a #)
-- | Write a value to the mutable array. The offset is in elements of type
-- @a@ rather than in bytes.
writeByteArray# :: MutableByteArray# s -> Int# -> a -> State# s -> State# s
-- | Read a value from a memory position given by an address and an offset.
-- The memory block the address refers to must be immutable. The offset is in
-- elements of type @a@ rather than in bytes.
indexOffAddr# :: Addr# -> Int# -> a
-- | Read a value from a memory position given by an address and an offset.
-- The offset is in elements of type @a@ rather than in bytes.
readOffAddr# :: Addr# -> Int# -> State# s -> (# State# s, a #)
-- | Write a value to a memory position given by an address and an offset.
-- The offset is in elements of type @a@ rather than in bytes.
writeOffAddr# :: Addr# -> Int# -> a -> State# s -> State# s
#define derivePrim(ty, ctr, sz, align, idx_arr, rd_arr, wr_arr, idx_addr, rd_addr, wr_addr) \
instance Prim ty where { \
sizeOf# _ = unI# sz \
; alignment# _ = unI# align \
; indexByteArray# arr# i# = ctr (idx_arr arr# i#) \
; readByteArray# arr# i# s# = case rd_arr arr# i# s# of \
{ (# s1#, x# #) -> (# s1#, ctr x# #) } \
; writeByteArray# arr# i# (ctr x#) s# = wr_arr arr# i# x# s# \
\
; indexOffAddr# addr# i# = ctr (idx_addr addr# i#) \
; readOffAddr# addr# i# s# = case rd_addr addr# i# s# of \
{ (# s1#, x# #) -> (# s1#, ctr x# #) } \
; writeOffAddr# addr# i# (ctr x#) s# = wr_addr addr# i# x# s# }
unI# :: Int -> Int#
unI# (I# n#) = n#
derivePrim(Word, W#, sIZEOF_WORD, aLIGNMENT_WORD,
indexWordArray#, readWordArray#, writeWordArray#,
indexWordOffAddr#, readWordOffAddr#, writeWordOffAddr#)
derivePrim(Word8, W8#, sIZEOF_WORD8, aLIGNMENT_WORD8,
indexWord8Array#, readWord8Array#, writeWord8Array#,
indexWord8OffAddr#, readWord8OffAddr#, writeWord8OffAddr#)
derivePrim(Word16, W16#, sIZEOF_WORD16, aLIGNMENT_WORD16,
indexWord16Array#, readWord16Array#, writeWord16Array#,
indexWord16OffAddr#, readWord16OffAddr#, writeWord16OffAddr#)
derivePrim(Word32, W32#, sIZEOF_WORD32, aLIGNMENT_WORD32,
indexWord32Array#, readWord32Array#, writeWord32Array#,
indexWord32OffAddr#, readWord32OffAddr#, writeWord32OffAddr#)
derivePrim(Word64, W64#, sIZEOF_WORD64, aLIGNMENT_WORD64,
indexWord64Array#, readWord64Array#, writeWord64Array#,
indexWord64OffAddr#, readWord64OffAddr#, writeWord64OffAddr#)
derivePrim(Int, I#, sIZEOF_INT, aLIGNMENT_INT,
indexIntArray#, readIntArray#, writeIntArray#,
indexIntOffAddr#, readIntOffAddr#, writeIntOffAddr#)
derivePrim(Int8, I8#, sIZEOF_INT8, aLIGNMENT_INT8,
indexInt8Array#, readInt8Array#, writeInt8Array#,
indexInt8OffAddr#, readInt8OffAddr#, writeInt8OffAddr#)
derivePrim(Int16, I16#, sIZEOF_INT16, aLIGNMENT_INT16,
indexInt16Array#, readInt16Array#, writeInt16Array#,
indexInt16OffAddr#, readInt16OffAddr#, writeInt16OffAddr#)
derivePrim(Int32, I32#, sIZEOF_INT32, aLIGNMENT_INT32,
indexInt32Array#, readInt32Array#, writeInt32Array#,
indexInt32OffAddr#, readInt32OffAddr#, writeInt32OffAddr#)
derivePrim(Int64, I64#, sIZEOF_INT64, aLIGNMENT_INT64,
indexInt64Array#, readInt64Array#, writeInt64Array#,
indexInt64OffAddr#, readInt64OffAddr#, writeInt64OffAddr#)
derivePrim(Float, F#, sIZEOF_FLOAT, aLIGNMENT_FLOAT,
indexFloatArray#, readFloatArray#, writeFloatArray#,
indexFloatOffAddr#, readFloatOffAddr#, writeFloatOffAddr#)
derivePrim(Double, D#, sIZEOF_DOUBLE, aLIGNMENT_DOUBLE,
indexDoubleArray#, readDoubleArray#, writeDoubleArray#,
indexDoubleOffAddr#, readDoubleOffAddr#, writeDoubleOffAddr#)
derivePrim(Char, C#, sIZEOF_CHAR, aLIGNMENT_CHAR,
indexWideCharArray#, readWideCharArray#, writeWideCharArray#,
indexWideCharOffAddr#, readWideCharOffAddr#, writeWideCharOffAddr#)
derivePrim(Addr, Addr, sIZEOF_PTR, aLIGNMENT_PTR,
indexAddrArray#, readAddrArray#, writeAddrArray#,
indexAddrOffAddr#, readAddrOffAddr#, writeAddrOffAddr#)
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