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