Data.Text.Array

Packed, unboxed, heap-resident arrays. Suitable for performance critical use, both in terms of large data quantities and high speed.

This module is intended to be imported qualified, to avoid name clashes with Prelude functions, e.g.

import qualified Data.Text.Array as A

The names in this module resemble those in the Array family of modules, but are shorter due to the assumption of qualified naming.

Types

data Array

Immutable array type.

Constructors

Array

Fields

• aBA :: ByteArray#

data MArray s

Mutable array type, for use in the ST monad.

Constructors

MArray

Fields

• maBA :: MutableByteArray# s

Functions

copyM

Arguments

:: MArray s

Destination

-> Int

Destination offset

-> MArray s

Source

-> Int

Source offset

-> Int

Count

-> ST s ()

Copy some elements of a mutable array.

copyI

Arguments

:: MArray s

Destination

-> Int

Destination offset

-> Array

Source

-> Int

Source offset

-> Int

First offset in destination not to copy (i.e. not length)

-> ST s ()

Copy some elements of an immutable array.

empty :: Array

An empty immutable array.

equal

Arguments

:: Array

First

-> Int

Offset into first

-> Array

Second

-> Int

Offset into second

-> Int

Count

-> Bool

Compare portions of two arrays for equality. No bounds checking is performed.

run :: (forall s. ST s (MArray s)) -> Array

Run an action in the ST monad and return an immutable array of its result.

run2 :: (forall s. ST s (MArray s, a)) -> (Array, a)

Run an action in the ST monad and return an immutable array of its result paired with whatever else the action returns.

toList :: Array -> Int -> Int -> [Word16]

Convert an immutable array to a list.

unsafeFreeze :: MArray s -> ST s Array

Freeze a mutable array. Do not mutate the MArray afterwards!

unsafeIndex :: Array -> Int -> Word16

Unchecked read of an immutable array. May return garbage or crash on an out-of-bounds access.

new :: forall s. Int -> ST s (MArray s)

Create an uninitialized mutable array.

unsafeWrite :: MArray s -> Int -> Word16 -> ST s ()

Unchecked write of a mutable array. May return garbage or crash on an out-of-bounds access.