Copyright	(c) The University of Glasgow 2001
License	BSD-style (see the file libraries/base/LICENSE)
Maintainer	libraries@haskell.org
Stability	experimental
Portability	non-portable (uses Data.Array.MArray)
Safe Haskell	None
Language	Haskell2010

Data.Array.IO

Contents

Description

Mutable boxed and unboxed arrays in the IO monad.

Synopsis

`IO` arrays with boxed elements

data IOArray i e :: * -> * -> * Source

An IOArray is a mutable, boxed, non-strict array in the IO monad. The type arguments are as follows:

Instances

`IO` arrays with unboxed elements

Mutable, unboxed, strict arrays in the IO monad. The type arguments are as follows:

i: the index type of the array (should be an instance of Ix)
e: the element type of the array. Only certain element types are supported: see Data.Array.MArray for a list of instances.

Instances

MArray IOUArray Bool IO
MArray IOUArray Char IO
MArray IOUArray Double IO
MArray IOUArray Float IO
MArray IOUArray Int IO
MArray IOUArray Int8 IO
MArray IOUArray Int16 IO
MArray IOUArray Int32 IO
MArray IOUArray Int64 IO
MArray IOUArray Word IO
MArray IOUArray Word8 IO
MArray IOUArray Word16 IO
MArray IOUArray Word32 IO
MArray IOUArray Word64 IO
MArray IOUArray (StablePtr a) IO
MArray IOUArray (Ptr a) IO
MArray IOUArray (FunPtr a) IO
Eq (IOUArray i e)
Typeable (* -> * -> *) IOUArray

Arguments

:: Handle	Handle to read from
-> IOUArray Int Word8	Array in which to place the values
-> Int	Number of `Word8`s to read
-> IO Int	Returns: the number of `Word8`s actually read, which might be smaller than the number requested if the end of file was reached.

Reads a number of Word8s from the specified Handle directly into an array.

Arguments

Writes an array of Word8 to the specified Handle.