Documentation

module Foreign

module Foreign.C

type MbString = Maybe String Source

marshall_bool_ :: Bool -> IO Int Source

unmarshall_bool_ :: Int -> IO Bool Source

marshall_string_ :: [Char] -> IO CString Source

unmarshall_string_ :: CString -> IO String Source

marshall_stringLen_ :: [Char] -> IO CStringLen Source

unmarshall_stringLen_ :: CString -> Int -> IO String Source

data Float

Single-precision floating point numbers. It is desirable that this type be at least equal in range and precision to the IEEE single-precision type.

Instances

Enum Float
Eq Float
Floating Float
Fractional Float
Num Float
Ord Float
Real Float
RealFloat Float
RealFrac Float
Show Float

data Double

Double-precision floating point numbers. It is desirable that this type be at least equal in range and precision to the IEEE double-precision type.

Instances

Enum Double
Eq Double
Floating Double
Fractional Double
Num Double
Ord Double
Real Double
RealFloat Double
RealFrac Double
Show Double

data Char

The character type Char is an enumeration whose values represent Unicode (or equivalently ISO/IEC 10646) characters (see http://www.unicode.org/ for details). This set extends the ISO 8859-1 (Latin-1) character set (the first 256 charachers), which is itself an extension of the ASCII character set (the first 128 characters). A character literal in Haskell has type Char.

To convert a Char to or from the corresponding Int value defined by Unicode, use Prelude.toEnum and Prelude.fromEnum from the Prelude.Enum class respectively (or equivalently ord and chr).

Instances

Eq Char
Ord Char
Show Char