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%
% (c) The AQUA Project, Glasgow University, 1994-1996
%
\section[Addr]{Module @Addr@}
\begin{code}
#include "MachDeps.h"
module Addr
( Addr
, module Addr
#ifndef __HUGS__
, module Word
, module Int
, module PrelAddr
#endif
-- (non-standard) coercions
, addrToInt -- :: Addr -> Int
, intToAddr -- :: Int -> Addr
) where
import NumExts
#ifndef __HUGS__
import PrelAddr
import PrelForeign
import PrelStable
import PrelBase
import PrelIOBase ( IO(..) )
import Word ( indexWord8OffAddr, indexWord16OffAddr
, indexWord32OffAddr, indexWord64OffAddr
, readWord8OffAddr, readWord16OffAddr
, readWord32OffAddr, readWord64OffAddr
, writeWord8OffAddr, writeWord16OffAddr
, writeWord32OffAddr, writeWord64OffAddr
)
import Int ( indexInt8OffAddr, indexInt16OffAddr
, indexInt32OffAddr, indexInt64OffAddr
, readInt8OffAddr, readInt16OffAddr
, readInt32OffAddr, readInt64OffAddr
, writeInt8OffAddr, writeInt16OffAddr
, writeInt32OffAddr, writeInt64OffAddr
)
#endif
\end{code}
\begin{code}
#ifdef __HUGS__
instance Show Addr where
showsPrec p addr rs = pad_out (showHex int "") rs
where
-- want 0s prefixed to pad it out to a fixed length.
pad_out ('0':'x':ls) rs =
'0':'x':(replicate (2*ADDR_SIZE_IN_BYTES - length ls) '0')
++ ls ++ rs
int = primAddrToInt addr
#else
instance Show Addr where
showsPrec p (A# a) rs = pad_out (showHex int "") rs
where
-- want 0s prefixed to pad it out to a fixed length.
pad_out ('0':'x':ls) rs =
'0':'x':(replicate (2*ADDR_SIZE_IN_BYTES - length ls) '0') ++ ls ++ rs
int =
case word2Integer# (int2Word# (addr2Int# a)) of
(# s, d #) -> J# s d
#endif
\end{code}
Coercing between machine ints and words
\begin{code}
addrToInt :: Addr -> Int
intToAddr :: Int -> Addr
#ifdef __HUGS__
addrToInt = primAddrToInt
intToAddr = primIntToAddr
#else
addrToInt (A# a#) = I# (addr2Int# a#)
intToAddr (I# i#) = A# (int2Addr# i#)
#endif
\end{code}
Indexing immutable memory:
\begin{code}
indexCharOffAddr :: Addr -> Int -> Char
indexIntOffAddr :: Addr -> Int -> Int
indexWordOffAddr :: Addr -> Int -> Word
--in PrelAddr: indexAddrOffAddr :: Addr -> Int -> Addr
indexFloatOffAddr :: Addr -> Int -> Float
indexDoubleOffAddr :: Addr -> Int -> Double
indexStablePtrOffAddr :: Addr -> Int -> StablePtr a
#ifdef __HUGS__
indexCharOffAddr = error "TODO: indexCharOffAddr "
indexIntOffAddr = error "TODO: indexIntOffAddr "
indexWordOffAddr = error "TODO: indexWordOffAddr "
indexAddrOffAddr = error "TODO: indexAddrOffAddr "
indexFloatOffAddr = error "TODO: indexFloatOffAddr "
indexDoubleOffAddr = error "TODO: indexDoubleOffAddr"
indexStablePtrOffAddr = error "TODO: indexStablePtrOffAddr"
#else
indexCharOffAddr (A# addr#) n
= case n of { I# n# ->
case indexCharOffAddr# addr# n# of { r# ->
(C# r#)}}
indexIntOffAddr (A# addr#) n
= case n of { I# n# ->
case indexIntOffAddr# addr# n# of { r# ->
(I# r#)}}
indexWordOffAddr (A# addr#) n
= case n of { I# n# ->
case indexWordOffAddr# addr# n# of { r# ->
(W# r#)}}
indexFloatOffAddr (A# addr#) n
= case n of { I# n# ->
case indexFloatOffAddr# addr# n# of { r# ->
(F# r#)}}
indexDoubleOffAddr (A# addr#) n
= case n of { I# n# ->
case indexDoubleOffAddr# addr# n# of { r# ->
(D# r#)}}
indexStablePtrOffAddr (A# addr#) n
= case n of { I# n# ->
case indexStablePtrOffAddr# addr# n# of { r# ->
(StablePtr r#)}}
#endif
\end{code}
Indexing mutable memory:
\begin{code}
readCharOffAddr :: Addr -> Int -> IO Char
readIntOffAddr :: Addr -> Int -> IO Int
readWordOffAddr :: Addr -> Int -> IO Word
readAddrOffAddr :: Addr -> Int -> IO Addr
readFloatOffAddr :: Addr -> Int -> IO Float
readDoubleOffAddr :: Addr -> Int -> IO Double
readStablePtrOffAddr :: Addr -> Int -> IO (StablePtr a)
#ifdef __HUGS__
readCharOffAddr = error "TODO: readCharOffAddr "
readIntOffAddr = error "TODO: readIntOffAddr "
readWordOffAddr = error "TODO: readWordOffAddr "
readAddrOffAddr = error "TODO: readAddrOffAddr "
readFloatOffAddr = error "TODO: readFloatOffAddr "
readDoubleOffAddr = error "TODO: readDoubleOffAddr "
readStablePtrOffAddr = error "TODO: readStablePtrOffAddr"
#else
readCharOffAddr a i = case indexCharOffAddr a i of { C# o# -> return (C# o#) }
readIntOffAddr a i = case indexIntOffAddr a i of { I# o# -> return (I# o#) }
readWordOffAddr a i = case indexWordOffAddr a i of { W# o# -> return (W# o#) }
readAddrOffAddr a i = case indexAddrOffAddr a i of { A# o# -> return (A# o#) }
readFloatOffAddr a i = case indexFloatOffAddr a i of { F# o# -> return (F# o#) }
readDoubleOffAddr a i = case indexDoubleOffAddr a i of { D# o# -> return (D# o#) }
readStablePtrOffAddr a i = case indexStablePtrOffAddr a i of { StablePtr x -> return (StablePtr x) }
#endif
\end{code}
\begin{code}
writeCharOffAddr :: Addr -> Int -> Char -> IO ()
writeIntOffAddr :: Addr -> Int -> Int -> IO ()
writeWordOffAddr :: Addr -> Int -> Word -> IO ()
writeAddrOffAddr :: Addr -> Int -> Addr -> IO ()
writeFloatOffAddr :: Addr -> Int -> Float -> IO ()
writeDoubleOffAddr :: Addr -> Int -> Double -> IO ()
#ifdef __HUGS__
writeCharOffAddr = error "TODO: writeCharOffAddr "
writeIntOffAddr = error "TODO: writeIntOffAddr "
writeWordOffAddr = error "TODO: writeWordOffAddr "
writeAddrOffAddr = error "TODO: writeAddrOffAddr "
writeFloatOffAddr = error "TODO: writeFloatOffAddr "
writeDoubleOffAddr = error "TODO: writeDoubleOffAddr "
#else
writeCharOffAddr (A# a#) (I# i#) (C# c#) = IO $ \ s# ->
case (writeCharOffAddr# a# i# c# s#) of s2# -> (# s2#, () #)
writeIntOffAddr (A# a#) (I# i#) (I# e#) = IO $ \ s# ->
case (writeIntOffAddr# a# i# e# s#) of s2# -> (# s2#, () #)
writeWordOffAddr (A# a#) (I# i#) (W# e#) = IO $ \ s# ->
case (writeWordOffAddr# a# i# e# s#) of s2# -> (# s2#, () #)
writeAddrOffAddr (A# a#) (I# i#) (A# e#) = IO $ \ s# ->
case (writeAddrOffAddr# a# i# e# s#) of s2# -> (# s2#, () #)
writeFloatOffAddr (A# a#) (I# i#) (F# e#) = IO $ \ s# ->
case (writeFloatOffAddr# a# i# e# s#) of s2# -> (# s2#, () #)
writeDoubleOffAddr (A# a#) (I# i#) (D# e#) = IO $ \ s# ->
case (writeDoubleOffAddr# a# i# e# s#) of s2# -> (# s2#, () #)
#ifndef __PARALLEL_HASKELL__
writeForeignObjOffAddr :: Addr -> Int -> ForeignObj -> IO ()
writeForeignObjOffAddr (A# a#) (I# i#) (ForeignObj e#) = IO $ \ s# ->
case (writeForeignObjOffAddr# a# i# e# s#) of s2# -> (# s2#, () #)
#endif
writeStablePtrOffAddr :: Addr -> Int -> StablePtr a -> IO ()
writeStablePtrOffAddr (A# a#) (I# i#) (StablePtr e#) = IO $ \ s# ->
case (writeStablePtrOffAddr# a# i# e# s#) of s2# -> (# s2# , () #)
#endif
\end{code}
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