Foreign/C/Types.hs

   1 {-# OPTIONS -fno-implicit-prelude #-}
   2 -----------------------------------------------------------------------------
   3 -- |
   4 -- Module      :  Foreign.C.Types
   5 -- Copyright   :  (c) The FFI task force 2001
   6 -- License     :  BSD-style (see the file libraries/base/LICENSE)
   7 --
   8 -- Maintainer  :  ffi@haskell.org
   9 -- Stability   :  provisional
  10 -- Portability :  portable
  11 --
  12 -- Mapping of C types to corresponding Haskell types. A cool hack...
  13 --
  14 -----------------------------------------------------------------------------
  15
  16 module Foreign.C.Types
  17         ( -- Integral types, instances of: Eq, Ord, Num, Read, Show, Enum,
  18           -- Typeable, Storable, Bounded, Real, Integral, Bits
  19           CChar(..),  CSChar(..),  CUChar(..)
  20         , CShort(..), CUShort(..), CInt(..),   CUInt(..)
  21         , CLong(..),  CULong(..),  CLLong(..), CULLong(..)
  22
  23           -- Floating types, instances of: Eq, Ord, Num, Read, Show, Enum,
  24           -- Typeable, Storable, Real, Fractional, Floating, RealFrac,
  25           -- RealFloat
  26         , CFloat(..),  CDouble(..), CLDouble(..)
  27         ) where
  28
  29 import Data.Bits        ( Bits(..) )
  30 import Data.Int         ( Int8,  Int16,  Int32,  Int64  )
  31 import Data.Word        ( Word8, Word16, Word32, Word64 )
  32 import Data.Dynamic
  33
  34 #ifdef __GLASGOW_HASKELL__
  35 import GHC.Base
  36 import GHC.Float
  37 import GHC.Enum
  38 import GHC.Real
  39 import GHC.Show
  40 import GHC.Read
  41 import GHC.Num
  42 #endif
  43
  44 #include "CTypes.h"
  45
  46 INTEGRAL_TYPE(CChar,tyConCChar,"CChar",HTYPE_CHAR)
  47 INTEGRAL_TYPE(CSChar,tyConCSChar,"CSChar",HTYPE_SIGNED_CHAR)
  48 INTEGRAL_TYPE(CUChar,tyConCUChar,"CUChar",HTYPE_UNSIGNED_CHAR)
  49
  50 INTEGRAL_TYPE(CShort,tyConCShort,"CShort",HTYPE_SHORT)
  51 INTEGRAL_TYPE(CUShort,tyConCUShort,"CUShort",HTYPE_UNSIGNED_SHORT)
  52
  53 INTEGRAL_TYPE(CInt,tyConCInt,"CInt",HTYPE_INT)
  54 INTEGRAL_TYPE(CUInt,tyConCUInt,"CUInt",HTYPE_UNSIGNED_INT)
  55
  56 INTEGRAL_TYPE(CLong,tyConCLong,"CLong",HTYPE_LONG)
  57 INTEGRAL_TYPE(CULong,tyConCULong,"CULong",HTYPE_UNSIGNED_LONG)
  58
  59 INTEGRAL_TYPE(CLLong,tyConCLLong,"CLLong",HTYPE_LONG_LONG)
  60 INTEGRAL_TYPE(CULLong,tyConCULLong,"CULLong",HTYPE_UNSIGNED_LONG_LONG)
  61
  62 {-# RULES
  63 "fromIntegral/a->CChar"   fromIntegral = \x -> CChar   (fromIntegral x)
  64 "fromIntegral/a->CSChar"  fromIntegral = \x -> CSChar  (fromIntegral x)
  65 "fromIntegral/a->CUChar"  fromIntegral = \x -> CUChar  (fromIntegral x)
  66 "fromIntegral/a->CShort"  fromIntegral = \x -> CShort  (fromIntegral x)
  67 "fromIntegral/a->CUShort" fromIntegral = \x -> CUShort (fromIntegral x)
  68 "fromIntegral/a->CInt"    fromIntegral = \x -> CInt    (fromIntegral x)
  69 "fromIntegral/a->CUInt"   fromIntegral = \x -> CUInt   (fromIntegral x)
  70 "fromIntegral/a->CLong"   fromIntegral = \x -> CLong   (fromIntegral x)
  71 "fromIntegral/a->CULong"  fromIntegral = \x -> CULong  (fromIntegral x)
  72 "fromIntegral/a->CLLong"  fromIntegral = \x -> CLLong  (fromIntegral x)
  73 "fromIntegral/a->CULLong" fromIntegral = \x -> CULLong (fromIntegral x)
  74
  75 "fromIntegral/CChar->a"   fromIntegral = \(CChar   x) -> fromIntegral x
  76 "fromIntegral/CSChar->a"  fromIntegral = \(CSChar  x) -> fromIntegral x
  77 "fromIntegral/CUChar->a"  fromIntegral = \(CUChar  x) -> fromIntegral x
  78 "fromIntegral/CShort->a"  fromIntegral = \(CShort  x) -> fromIntegral x
  79 "fromIntegral/CUShort->a" fromIntegral = \(CUShort x) -> fromIntegral x
  80 "fromIntegral/CInt->a"    fromIntegral = \(CInt    x) -> fromIntegral x
  81 "fromIntegral/CUInt->a"   fromIntegral = \(CUInt   x) -> fromIntegral x
  82 "fromIntegral/CLong->a"   fromIntegral = \(CLong   x) -> fromIntegral x
  83 "fromIntegral/CULong->a"  fromIntegral = \(CULong  x) -> fromIntegral x
  84 "fromIntegral/CLLong->a"  fromIntegral = \(CLLong  x) -> fromIntegral x
  85 "fromIntegral/CULLong->a" fromIntegral = \(CULLong x) -> fromIntegral x
  86  #-}
  87
  88 FLOATING_TYPE(CFloat,tyConCFloat,"CFloat",HTYPE_FLOAT)
  89 FLOATING_TYPE(CDouble,tyConCDouble,"CDouble",HTYPE_DOUBLE)
  90 -- HACK: Currently no long double in the FFI, so we simply re-use double
  91 FLOATING_TYPE(CLDouble,tyConCLDouble,"CLDouble",HTYPE_DOUBLE)
  92
  93
  94 #include "Dynamic.h"
  95 INSTANCE_TYPEABLE0(CChar,cCharTc,"CChar")
  96 INSTANCE_TYPEABLE0(CSChar,cSCharTc,"CSChar")
  97 INSTANCE_TYPEABLE0(CUChar,cUCharTc,"CUChar")
  98
  99 INSTANCE_TYPEABLE0(CShort,cShortTc,"CShort")
 100 INSTANCE_TYPEABLE0(CUShort,cUShortTc,"CUShort")
 101
 102 INSTANCE_TYPEABLE0(CInt,cIntTc,"CInt")
 103 INSTANCE_TYPEABLE0(CUInt,cUIntTc,"CUInt")
 104
 105 INSTANCE_TYPEABLE0(CLong,cLongTc,"CLong")
 106 INSTANCE_TYPEABLE0(CULong,cULongTc,"CULong")
 107
 108 INSTANCE_TYPEABLE0(CLLong,cLLongTc,"CLLong")
 109 INSTANCE_TYPEABLE0(CULLong,cULLongTc,"CULLong")
 110
 111 INSTANCE_TYPEABLE0(CFloat,cFloatTc,"CFloat")
 112 INSTANCE_TYPEABLE0(CDouble,cDoubleTc,"CDouble")
 113 INSTANCE_TYPEABLE0(CLDouble,cLDoubleTc,"CLDouble")