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Byte to bit list

Converts a byte list to a bit list. Takes a list of bytes and transforms it all into a flattened array of bits. For example, > bytesToBits [|byte(0x0F);byte(0xF0)|] 16 ;; val it : byte [] = [|0uy; 0uy; 0uy; 0uy; 1uy; 1uy; 1uy; 1uy; 1uy; 1uy; 1uy; 1uy; 0uy; 0uy; 0uy; 0uy|]

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let bitMasks = Seq.unfold (fun bitIndex -> Some((pown 2 bitIndex, bitIndex), bitIndex + 1)) 0                           
                   |> Seq.take 8
                   |> Seq.toList
                   |> List.rev

let byteToBitArray b = List.map (fun (bitMask, bitPosition) -> (b &&& bitMask) >>> bitPosition) bitMasks

val bitMasks : (int * int) list

Full name: Script.bitMasks

module Seq

from Microsoft.FSharp.Collections

val unfold : generator:('State -> ('T * 'State) option) -> state:'State -> seq<'T>

Full name: Microsoft.FSharp.Collections.Seq.unfold

val bitIndex : int

union case Option.Some: Value: 'T -> Option<'T>

val pown : x:'T -> n:int -> 'T (requires member get_One and member ( * ) and member ( / ))

Full name: Microsoft.FSharp.Core.Operators.pown

val take : count:int -> source:seq<'T> -> seq<'T>

Full name: Microsoft.FSharp.Collections.Seq.take

val toList : source:seq<'T> -> 'T list

Full name: Microsoft.FSharp.Collections.Seq.toList

Multiple items
module List

from Microsoft.FSharp.Collections

--------------------
type List<'T> =
  | ( [] )
  | ( :: ) of Head: 'T * Tail: 'T list
  interface IEnumerable
  interface IEnumerable<'T>
  member Head : 'T
  member IsEmpty : bool
  member Item : index:int -> 'T with get
  member Length : int
  member Tail : 'T list
  static member Cons : head:'T * tail:'T list -> 'T list
  static member Empty : 'T list

Full name: Microsoft.FSharp.Collections.List<_>

val rev : list:'T list -> 'T list

Full name: Microsoft.FSharp.Collections.List.rev

val byteToBitArray : b:int -> int list

Full name: Script.byteToBitArray

val b : int

val map : mapping:('T -> 'U) -> list:'T list -> 'U list

Full name: Microsoft.FSharp.Collections.List.map

val bitMask : int

val bitPosition : int32

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More information

Link:	http://fssnip.net/jB
Posted:	10 years ago
Author:	devshorts
Tags:	low level , byte