-{-# OPTIONS_GHC -fno-implicit-prelude #-}
+{-# LANGUAGE CPP
+ , NoImplicitPrelude
+ , MagicHash
+ , GeneralizedNewtypeDeriving
+ #-}
+{-# OPTIONS_GHC -fno-warn-unused-binds #-}
+#ifdef __GLASGOW_HASKELL__
+{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}
+#endif
+-- XXX -fno-warn-unused-binds stops us warning about unused constructors,
+-- but really we should just remove them if we don't want them
+
-----------------------------------------------------------------------------
-- |
-- Module : Foreign.C.Types
-----------------------------------------------------------------------------
module Foreign.C.Types
- ( -- * Representations of C types
+ ( -- * Representations of C types
#ifndef __NHC__
- -- $ctypes
-
- -- ** Integral types
- -- | These types are are represented as @newtype@s of
- -- types in "Data.Int" and "Data.Word", and are instances of
- -- 'Prelude.Eq', 'Prelude.Ord', 'Prelude.Num', 'Prelude.Read',
- -- 'Prelude.Show', 'Prelude.Enum', 'Typeable', 'Storable',
- -- 'Prelude.Bounded', 'Prelude.Real', 'Prelude.Integral' and
- -- 'Bits'.
- CChar, CSChar, CUChar
- , CShort, CUShort, CInt, CUInt
- , CLong, CULong
- , CPtrdiff, CSize, CWchar, CSigAtomic
+ -- $ctypes
+
+ -- ** Integral types
+ -- | These types are are represented as @newtype@s of
+ -- types in "Data.Int" and "Data.Word", and are instances of
+ -- 'Prelude.Eq', 'Prelude.Ord', 'Prelude.Num', 'Prelude.Read',
+ -- 'Prelude.Show', 'Prelude.Enum', 'Typeable', 'Storable',
+ -- 'Prelude.Bounded', 'Prelude.Real', 'Prelude.Integral' and
+ -- 'Bits'.
+ CChar, CSChar, CUChar
+ , CShort, CUShort, CInt, CUInt
+ , CLong, CULong
+ , CPtrdiff, CSize, CWchar, CSigAtomic
, CLLong, CULLong
- , CIntPtr, CUIntPtr
- , CIntMax, CUIntMax
-
- -- ** Numeric types
- -- | These types are are represented as @newtype@s of basic
- -- foreign types, and are instances of
- -- 'Prelude.Eq', 'Prelude.Ord', 'Prelude.Num', 'Prelude.Read',
- -- 'Prelude.Show', 'Prelude.Enum', 'Typeable' and 'Storable'.
- , CClock, CTime
-
- -- ** Floating types
- -- | These types are are represented as @newtype@s of
- -- 'Prelude.Float' and 'Prelude.Double', and are instances of
- -- 'Prelude.Eq', 'Prelude.Ord', 'Prelude.Num', 'Prelude.Read',
- -- 'Prelude.Show', 'Prelude.Enum', 'Typeable', 'Storable',
- -- 'Prelude.Real', 'Prelude.Fractional', 'Prelude.Floating',
- -- 'Prelude.RealFrac' and 'Prelude.RealFloat'.
- , CFloat, CDouble, CLDouble
+ , CIntPtr, CUIntPtr
+ , CIntMax, CUIntMax
+
+ -- ** Numeric types
+ -- | These types are are represented as @newtype@s of basic
+ -- foreign types, and are instances of
+ -- 'Prelude.Eq', 'Prelude.Ord', 'Prelude.Num', 'Prelude.Read',
+ -- 'Prelude.Show', 'Prelude.Enum', 'Typeable' and 'Storable'.
+ , CClock, CTime, CUSeconds, CSUSeconds
+
+ -- extracted from CTime, because we don't want this comment in
+ -- the Haskell 2010 report:
+
+ -- | To convert 'CTime' to 'Data.Time.UTCTime', use the following formula:
+ --
+ -- > posixSecondsToUTCTime (realToFrac :: POSIXTime)
+ --
+
+ -- ** Floating types
+ -- | These types are are represented as @newtype@s of
+ -- 'Prelude.Float' and 'Prelude.Double', and are instances of
+ -- 'Prelude.Eq', 'Prelude.Ord', 'Prelude.Num', 'Prelude.Read',
+ -- 'Prelude.Show', 'Prelude.Enum', 'Typeable', 'Storable',
+ -- 'Prelude.Real', 'Prelude.Fractional', 'Prelude.Floating',
+ -- 'Prelude.RealFrac' and 'Prelude.RealFloat'.
+ , CFloat, CDouble
+-- GHC doesn't support CLDouble yet
+#ifndef __GLASGOW_HASKELL__
+ , CLDouble
+#endif
#else
- -- Exported non-abstractly in nhc98 to fix an interface file problem.
- CChar(..), CSChar(..), CUChar(..)
- , CShort(..), CUShort(..), CInt(..), CUInt(..)
- , CLong(..), CULong(..)
- , CPtrdiff(..), CSize(..), CWchar(..), CSigAtomic(..)
+ -- Exported non-abstractly in nhc98 to fix an interface file problem.
+ CChar(..), CSChar(..), CUChar(..)
+ , CShort(..), CUShort(..), CInt(..), CUInt(..)
+ , CLong(..), CULong(..)
+ , CPtrdiff(..), CSize(..), CWchar(..), CSigAtomic(..)
, CLLong(..), CULLong(..)
- , CClock(..), CTime(..)
- , CFloat(..), CDouble(..), CLDouble(..)
+ , CClock(..), CTime(..), CUSeconds(..), CSUSeconds(..)
+ , CFloat(..), CDouble(..), CLDouble(..)
+ , CIntPtr(..), CUIntPtr(..), CIntMax(..), CUIntMax(..)
#endif
- -- ** Other types
+ -- ** Other types
-- Instances of: Eq and Storable
- , CFile, CFpos, CJmpBuf
- ) where
+ , CFile, CFpos, CJmpBuf
+ ) where
#ifndef __NHC__
import Foreign.Storable
-import Data.Bits ( Bits(..) )
-import Data.Int ( Int8, Int16, Int32, Int64 )
-import Data.Word ( Word8, Word16, Word32, Word64 )
-import Data.Typeable
+import Data.Bits ( Bits(..) )
+import Data.Int ( Int8, Int16, Int32, Int64 )
+import Data.Word ( Word8, Word16, Word32, Word64 )
+import {-# SOURCE #-} Data.Typeable
#ifdef __GLASGOW_HASKELL__
import GHC.Base
import GHC.Read
import GHC.Num
#else
-import Control.Monad
-import Foreign.Ptr
+import Control.Monad ( liftM )
+#endif
+
+#ifdef __HUGS__
+import Hugs.Ptr ( castPtr )
#endif
#include "HsBaseConfig.h"
FLOATING_TYPE(CFloat,tyConCFloat,"CFloat",HTYPE_FLOAT)
-- | Haskell type representing the C @double@ type.
FLOATING_TYPE(CDouble,tyConCDouble,"CDouble",HTYPE_DOUBLE)
+-- GHC doesn't support CLDouble yet
+#ifndef __GLASGOW_HASKELL__
-- HACK: Currently no long double in the FFI, so we simply re-use double
-- | Haskell type representing the C @long double@ type.
FLOATING_TYPE(CLDouble,tyConCLDouble,"CLDouble",HTYPE_DOUBLE)
+#endif
{-# RULES
"realToFrac/a->CFloat" realToFrac = \x -> CFloat (realToFrac x)
"realToFrac/a->CDouble" realToFrac = \x -> CDouble (realToFrac x)
-"realToFrac/a->CLDouble" realToFrac = \x -> CLDouble (realToFrac x)
"realToFrac/CFloat->a" realToFrac = \(CFloat x) -> realToFrac x
"realToFrac/CDouble->a" realToFrac = \(CDouble x) -> realToFrac x
-"realToFrac/CLDouble->a" realToFrac = \(CLDouble x) -> realToFrac x
#-}
+-- GHC doesn't support CLDouble yet
+-- "realToFrac/a->CLDouble" realToFrac = \x -> CLDouble (realToFrac x)
+-- "realToFrac/CLDouble->a" realToFrac = \(CLDouble x) -> realToFrac x
+
-- | Haskell type representing the C @ptrdiff_t@ type.
INTEGRAL_TYPE(CPtrdiff,tyConCPtrdiff,"CPtrdiff",HTYPE_PTRDIFF_T)
-- | Haskell type representing the C @size_t@ type.
-- | Haskell type representing the C @clock_t@ type.
ARITHMETIC_TYPE(CClock,tyConCClock,"CClock",HTYPE_CLOCK_T)
-- | Haskell type representing the C @time_t@ type.
+--
ARITHMETIC_TYPE(CTime,tyConCTime,"CTime",HTYPE_TIME_T)
+-- | Haskell type representing the C @useconds_t@ type.
+ARITHMETIC_TYPE(CUSeconds,tyConCUSeconds,"CUSeconds",HTYPE_USECONDS_T)
+-- | Haskell type representing the C @suseconds_t@ type.
+ARITHMETIC_TYPE(CSUSeconds,tyConCSUSeconds,"CSUSeconds",HTYPE_SUSECONDS_T)
-- FIXME: Implement and provide instances for Eq and Storable
-- | Haskell type representing the C @FILE@ type.
-}
-#else /* __NHC__ */
+#else /* __NHC__ */
import NHC.FFI
( CChar(..), CSChar(..), CUChar(..)
, CShort(..), CUShort(..), CInt(..), CUInt(..)
, CLong(..), CULong(..), CLLong(..), CULLong(..)
, CPtrdiff(..), CSize(..), CWchar(..), CSigAtomic(..)
- , CClock(..), CTime(..)
+ , CClock(..), CTime(..), CUSeconds(..), CSUSeconds(..)
, CFloat(..), CDouble(..), CLDouble(..)
+ , CIntPtr(..), CUIntPtr(..),CIntMax(..), CUIntMax(..)
, CFile, CFpos, CJmpBuf
, Storable(..)
)
INSTANCE_BITS(CWchar)
INSTANCE_BITS(CSigAtomic)
INSTANCE_BITS(CSize)
+INSTANCE_BITS(CIntPtr)
+INSTANCE_BITS(CUIntPtr)
+INSTANCE_BITS(CIntMax)
+INSTANCE_BITS(CUIntMax)
#endif
projects / ghc-base.git / blobdiff