| Copyright | (c) The FFI task force 2001 |
|---|---|
| License | BSD-style (see the file libraries/base/LICENSE) |
| Maintainer | ffi@haskell.org |
| Stability | provisional |
| Portability | portable |
| Safe Haskell | Safe-Inferred |
| Language | Haskell2010 |
Foreign.C.Types
Description
Mapping of C types to corresponding Haskell types.
Synopsis
- newtype CChar = CChar Int8
- newtype CSChar = CSChar Int8
- newtype CUChar = CUChar Word8
- newtype CShort = CShort Int16
- newtype CUShort = CUShort Word16
- newtype CInt = CInt Int32
- newtype CUInt = CUInt Word32
- newtype CLong = CLong Int64
- newtype CULong = CULong Word64
- newtype CPtrdiff = CPtrdiff Int64
- newtype CSize = CSize Word64
- newtype CWchar = CWchar Int32
- newtype CSigAtomic = CSigAtomic Int32
- newtype CLLong = CLLong Int64
- newtype CULLong = CULLong Word64
- newtype CBool = CBool Word8
- newtype CIntPtr = CIntPtr Int64
- newtype CUIntPtr = CUIntPtr Word64
- newtype CIntMax = CIntMax Int64
- newtype CUIntMax = CUIntMax Word64
- newtype CClock = CClock Int64
- newtype CTime = CTime Int64
- newtype CUSeconds = CUSeconds Word32
- newtype CSUSeconds = CSUSeconds Int64
- newtype CFloat = CFloat Float
- newtype CDouble = CDouble Double
- data CFile
- data CFpos
- data CJmpBuf
Representations of C types
Haskell type representing the C char type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C signed char type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C unsigned char type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C short type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C unsigned short type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C int type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C unsigned int type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C long type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C unsigned long type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C ptrdiff_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C size_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C wchar_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
newtype CSigAtomic Source #
Haskell type representing the C sig_atomic_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
See Note [Lack of signals on wasm32-wasi].
Constructors
| CSigAtomic Int32 |
Instances
Haskell type representing the C long long type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C unsigned long long type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C bool type.
(The concrete types of Foreign.C.Types are platform-specific.)
Since: base-4.10.0.0
Instances
Instances
Instances
Instances
Instances
Numeric types
These types are represented as newtypes of basic
foreign types, and are instances of
Eq, Ord, Num, Read,
Show, Enum, Typeable and
Storable.
Haskell type representing the C clock_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C time_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C useconds_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Since: base-4.4.0.0
Instances
newtype CSUSeconds Source #
Haskell type representing the C suseconds_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Since: base-4.4.0.0
Constructors
| CSUSeconds Int64 |
Instances
To convert CTime to UTCTime, use the following:
\t -> posixSecondsToUTCTime (realToFrac t :: POSIXTime)
Floating types
These types are represented as newtypes of
Float and Double, and are instances of
Eq, Ord, Num, Read,
Show, Enum, Typeable, Storable,
Real, Fractional, Floating,
RealFrac and RealFloat. That does mean
that CFloat's (respectively CDouble's) instances of
Eq, Ord, Num and
Fractional are as badly behaved as Float's
(respectively Double's).
Haskell type representing the C float type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Haskell type representing the C double type.
(The concrete types of Foreign.C.Types are platform-specific.)
Instances
Other types
Haskell type representing the C FILE type.
(The concrete types of Foreign.C.Types are platform-specific.)
Haskell type representing the C fpos_t type.
(The concrete types of Foreign.C.Types are platform-specific.)
Haskell type representing the C jmp_buf type.
(The concrete types of Foreign.C.Types are platform-specific.)