array-0.5.0.0: Mutable and immutable arrays

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

IO arrays with boxed elements
IO arrays with unboxed elements
Overloaded mutable array interface
Doing I/O with IOUArrays

Description

Mutable boxed and unboxed arrays in the IO monad.

Synopsis

data IOArray i e :: * -> * -> *
data IOUArray i e
module Data.Array.MArray
hGetArray :: Handle -> IOUArray Int Word8 -> Int -> IO Int
hPutArray :: Handle -> IOUArray Int Word8 -> Int -> IO ()

`IO` arrays with boxed elements

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

An IOArray is a mutable, boxed, non-strict array 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.

Instances

MArray IOArray e IO

Eq (IOArray i e)

Typeable (* -> * -> *) IOArray

`IO` arrays with unboxed elements

data IOUArray i e Source

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

Overloaded mutable array interface

module Data.Array.MArray

Doing I/O with `IOUArray`s

hGetArray Source

Arguments

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 Word8 s from the specified Handle directly into an array.

hPutArray Source

Arguments

Handle to write to

-> IOUArray Int Word8

Array to write from

-> Int

Number of Word8 s to write

-> IO ()

Writes an array of Word8 to the specified Handle .