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(..)
  22         , CPtrdiff(..), CSize(..), CWchar(..), CSigAtomic(..)
  23 #ifndef __HUGS__
  24         , CLLong(..), CULLong(..)
  25 #endif
  26           -- Numeric types, instances of: Eq, Ord, Num, Read, Show, Enum,
  27           -- Typeable, Storable
  28         , CClock(..),   CTime(..)
  29
  30           -- Floating types, instances of: Eq, Ord, Num, Read, Show, Enum,
  31           -- Typeable, Storable, Real, Fractional, Floating, RealFrac,
  32           -- RealFloat
  33         , CFloat(..),  CDouble(..), CLDouble(..)
  34
  35           -- Instances of: Eq and Storable
  36         , CFile,        CFpos,     CJmpBuf
  37         ) where
  38
  39 #ifdef __NHC__
  40 import NHC.FFI
  41   ( CChar(..),  CSChar(..),  CUChar(..)
  42   , CShort(..), CUShort(..), CInt(..),   CUInt(..)
  43   , CLong(..),  CULong(..), CLLong(..), CULLong(..)
  44   , CPtrdiff(..), CSize(..), CWchar(..), CSigAtomic(..)
  45   , CClock(..),   CTime(..)
  46   , CFloat(..),  CDouble(..), CLDouble(..)
  47   , CFile,        CFpos,     CJmpBuf
  48   , Storable(..)
  49   )
  50 #else
  51
  52 import Foreign.C.TypesISO
  53 import Foreign.Storable
  54 import Data.Bits        ( Bits(..) )
  55 import Data.Int         ( Int8,  Int16,  Int32,  Int64  )
  56 import Data.Word        ( Word8, Word16, Word32, Word64 )
  57 import Data.Dynamic
  58
  59 #ifdef __GLASGOW_HASKELL__
  60 import GHC.Base
  61 import GHC.Float
  62 import GHC.Enum
  63 import GHC.Real
  64 import GHC.Show
  65 import GHC.Read
  66 import GHC.Num
  67 #else
  68 import Control.Monad
  69 import Foreign.Ptr
  70 #endif
  71
  72 #include "Dynamic.h"
  73 #include "CTypes.h"
  74
  75 INTEGRAL_TYPE(CChar,tyConCChar,"CChar",HTYPE_CHAR)
  76 INTEGRAL_TYPE(CSChar,tyConCSChar,"CSChar",HTYPE_SIGNED_CHAR)
  77 INTEGRAL_TYPE(CUChar,tyConCUChar,"CUChar",HTYPE_UNSIGNED_CHAR)
  78
  79 INTEGRAL_TYPE(CShort,tyConCShort,"CShort",HTYPE_SHORT)
  80 INTEGRAL_TYPE(CUShort,tyConCUShort,"CUShort",HTYPE_UNSIGNED_SHORT)
  81
  82 INTEGRAL_TYPE(CInt,tyConCInt,"CInt",HTYPE_INT)
  83 INTEGRAL_TYPE(CUInt,tyConCUInt,"CUInt",HTYPE_UNSIGNED_INT)
  84
  85 INTEGRAL_TYPE(CLong,tyConCLong,"CLong",HTYPE_LONG)
  86 INTEGRAL_TYPE(CULong,tyConCULong,"CULong",HTYPE_UNSIGNED_LONG)
  87
  88 #ifndef __HUGS__
  89 INTEGRAL_TYPE(CLLong,tyConCLLong,"CLLong",HTYPE_LONG_LONG)
  90 INTEGRAL_TYPE(CULLong,tyConCULLong,"CULLong",HTYPE_UNSIGNED_LONG_LONG)
  91 #endif
  92
  93 {-# RULES
  94 "fromIntegral/a->CChar"   fromIntegral = \x -> CChar   (fromIntegral x)
  95 "fromIntegral/a->CSChar"  fromIntegral = \x -> CSChar  (fromIntegral x)
  96 "fromIntegral/a->CUChar"  fromIntegral = \x -> CUChar  (fromIntegral x)
  97 "fromIntegral/a->CShort"  fromIntegral = \x -> CShort  (fromIntegral x)
  98 "fromIntegral/a->CUShort" fromIntegral = \x -> CUShort (fromIntegral x)
  99 "fromIntegral/a->CInt"    fromIntegral = \x -> CInt    (fromIntegral x)
 100 "fromIntegral/a->CUInt"   fromIntegral = \x -> CUInt   (fromIntegral x)
 101 "fromIntegral/a->CLong"   fromIntegral = \x -> CLong   (fromIntegral x)
 102 "fromIntegral/a->CULong"  fromIntegral = \x -> CULong  (fromIntegral x)
 103 "fromIntegral/a->CLLong"  fromIntegral = \x -> CLLong  (fromIntegral x)
 104 "fromIntegral/a->CULLong" fromIntegral = \x -> CULLong (fromIntegral x)
 105
 106 "fromIntegral/CChar->a"   fromIntegral = \(CChar   x) -> fromIntegral x
 107 "fromIntegral/CSChar->a"  fromIntegral = \(CSChar  x) -> fromIntegral x
 108 "fromIntegral/CUChar->a"  fromIntegral = \(CUChar  x) -> fromIntegral x
 109 "fromIntegral/CShort->a"  fromIntegral = \(CShort  x) -> fromIntegral x
 110 "fromIntegral/CUShort->a" fromIntegral = \(CUShort x) -> fromIntegral x
 111 "fromIntegral/CInt->a"    fromIntegral = \(CInt    x) -> fromIntegral x
 112 "fromIntegral/CUInt->a"   fromIntegral = \(CUInt   x) -> fromIntegral x
 113 "fromIntegral/CLong->a"   fromIntegral = \(CLong   x) -> fromIntegral x
 114 "fromIntegral/CULong->a"  fromIntegral = \(CULong  x) -> fromIntegral x
 115 "fromIntegral/CLLong->a"  fromIntegral = \(CLLong  x) -> fromIntegral x
 116 "fromIntegral/CULLong->a" fromIntegral = \(CULLong x) -> fromIntegral x
 117  #-}
 118
 119 FLOATING_TYPE(CFloat,tyConCFloat,"CFloat",HTYPE_FLOAT)
 120 FLOATING_TYPE(CDouble,tyConCDouble,"CDouble",HTYPE_DOUBLE)
 121 -- HACK: Currently no long double in the FFI, so we simply re-use double
 122 FLOATING_TYPE(CLDouble,tyConCLDouble,"CLDouble",HTYPE_DOUBLE)
 123
 124 #endif