Data.Array.IO

Mutable boxed and unboxed arrays in the IO monad.

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

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 IOUArrays

hGetArray

Arguments

:: Handle

Handle to read from

-> IOUArray Int Word8

Array in which to place the values

-> Int

Number of Word8s to read

-> IO Int

Returns: the number of Word8s 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.

hPutArray

Arguments

:: Handle

Handle to write to

-> IOUArray Int Word8

Array to write from

-> Int

Number of Word8s to write

-> IO ()

Writes an array of Word8 to the specified Handle.