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-- This module describes utility functions.
module Utils where
import Prelude hiding (Word)
import Data.Bits
-------------------------------------------------------------------------------
-- Bitwork
toBit :: Bool -> Int
toBit True = 1
toBit False = 0
toBits :: Bits a => a -> [Int] -> [Int]
toBits x r = map (toBit . testBit x) r
toBitsWhole :: FiniteBits a => a -> [Int]
toBitsWhole x = toBits x [0..(finiteBitSize x - 1)]
fromBits :: [Int] -> Int
fromBits = foldl (\a b -> 2 * a + b) 0 . reverse
extractBits :: Bits a => a -> [Int] -> Int
extractBits x r = fromBits $ toBits x r
-------------------------------------------------------------------------------
-- Transformers for commands arguments
args2 :: (Int -> Int -> t) ->
[Int] -> [Int] -> t
args2 f a b = f (fromBits a) (fromBits b)
args3 :: (Int -> Int -> Int -> t) ->
[Int] -> [Int] -> [Int] -> t
args3 f a b c = f (fromBits a) (fromBits b) (fromBits c)
args4 :: (Int -> Int -> Int -> Int -> t) ->
[Int] -> [Int] -> [Int] -> [Int] -> t
args4 f a b c d = f (fromBits a) (fromBits b) (fromBits c) (fromBits d)
args5 :: (Int -> Int -> Int -> Int -> Int -> t) ->
[Int] -> [Int] -> [Int] -> [Int] -> [Int] -> t
args5 f a b c d e = f (fromBits a) (fromBits b) (fromBits c)
(fromBits d) (fromBits e)
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