| 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 | Trustworthy |
| Language | Haskell2010 |
Foreign.Marshal.Array
Contents
Description
Marshalling support: routines allocating, storing, and retrieving Haskell lists that are represented as arrays in the foreign language
- mallocArray :: Storable a => Int -> IO (Ptr a)
- mallocArray0 :: Storable a => Int -> IO (Ptr a)
- allocaArray :: Storable a => Int -> (Ptr a -> IO b) -> IO b
- allocaArray0 :: Storable a => Int -> (Ptr a -> IO b) -> IO b
- reallocArray :: Storable a => Ptr a -> Int -> IO (Ptr a)
- reallocArray0 :: Storable a => Ptr a -> Int -> IO (Ptr a)
- callocArray :: Storable a => Int -> IO (Ptr a)
- callocArray0 :: Storable a => Int -> IO (Ptr a)
- peekArray :: Storable a => Int -> Ptr a -> IO [a]
- peekArray0 :: (Storable a, Eq a) => a -> Ptr a -> IO [a]
- pokeArray :: Storable a => Ptr a -> [a] -> IO ()
- pokeArray0 :: Storable a => a -> Ptr a -> [a] -> IO ()
- newArray :: Storable a => [a] -> IO (Ptr a)
- newArray0 :: Storable a => a -> [a] -> IO (Ptr a)
- withArray :: Storable a => [a] -> (Ptr a -> IO b) -> IO b
- withArray0 :: Storable a => a -> [a] -> (Ptr a -> IO b) -> IO b
- withArrayLen :: Storable a => [a] -> (Int -> Ptr a -> IO b) -> IO b
- withArrayLen0 :: Storable a => a -> [a] -> (Int -> Ptr a -> IO b) -> IO b
- copyArray :: Storable a => Ptr a -> Ptr a -> Int -> IO ()
- moveArray :: Storable a => Ptr a -> Ptr a -> Int -> IO ()
- lengthArray0 :: (Storable a, Eq a) => a -> Ptr a -> IO Int
- advancePtr :: Storable a => Ptr a -> Int -> Ptr a
Marshalling arrays
Allocation
mallocArray :: Storable a => Int -> IO (Ptr a) Source #
Allocate storage for the given number of elements of a storable type
(like malloc, but for multiple elements).
mallocArray0 :: Storable a => Int -> IO (Ptr a) Source #
Like mallocArray, but add an extra position to hold a special
termination element.
allocaArray :: Storable a => Int -> (Ptr a -> IO b) -> IO b Source #
Temporarily allocate space for the given number of elements
(like alloca, but for multiple elements).
allocaArray0 :: Storable a => Int -> (Ptr a -> IO b) -> IO b Source #
Like allocaArray, but add an extra position to hold a special
termination element.
reallocArray0 :: Storable a => Ptr a -> Int -> IO (Ptr a) Source #
Adjust the size of an array including an extra position for the end marker.
callocArray :: Storable a => Int -> IO (Ptr a) Source #
Like mallocArray, but allocated memory is filled with bytes of value zero.
callocArray0 :: Storable a => Int -> IO (Ptr a) Source #
Like callocArray0, but allocated memory is filled with bytes of value
zero.
Marshalling
peekArray :: Storable a => Int -> Ptr a -> IO [a] Source #
Convert an array of given length into a Haskell list. The implementation is tail-recursive and so uses constant stack space.
peekArray0 :: (Storable a, Eq a) => a -> Ptr a -> IO [a] Source #
Convert an array terminated by the given end marker into a Haskell list
pokeArray :: Storable a => Ptr a -> [a] -> IO () Source #
Write the list elements consecutive into memory
pokeArray0 :: Storable a => a -> Ptr a -> [a] -> IO () Source #
Write the list elements consecutive into memory and terminate them with the given marker element
Combined allocation and marshalling
newArray :: Storable a => [a] -> IO (Ptr a) Source #
Write a list of storable elements into a newly allocated, consecutive
sequence of storable values
(like new, but for multiple elements).
newArray0 :: Storable a => a -> [a] -> IO (Ptr a) Source #
Write a list of storable elements into a newly allocated, consecutive sequence of storable values, where the end is fixed by the given end marker
withArray :: Storable a => [a] -> (Ptr a -> IO b) -> IO b Source #
Temporarily store a list of storable values in memory
(like with, but for multiple elements).
withArray0 :: Storable a => a -> [a] -> (Ptr a -> IO b) -> IO b Source #
Like withArray, but a terminator indicates where the array ends
withArrayLen :: Storable a => [a] -> (Int -> Ptr a -> IO b) -> IO b Source #
Like withArray, but the action gets the number of values
as an additional parameter
withArrayLen0 :: Storable a => a -> [a] -> (Int -> Ptr a -> IO b) -> IO b Source #
Like withArrayLen, but a terminator indicates where the array ends
Copying
(argument order: destination, source)
copyArray :: Storable a => Ptr a -> Ptr a -> Int -> IO () Source #
Copy the given number of elements from the second array (source) into the first array (destination); the copied areas may not overlap
moveArray :: Storable a => Ptr a -> Ptr a -> Int -> IO () Source #
Copy the given number of elements from the second array (source) into the first array (destination); the copied areas may overlap
Finding the length
lengthArray0 :: (Storable a, Eq a) => a -> Ptr a -> IO Int Source #
Return the number of elements in an array, excluding the terminator