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module Foundation.Random.Class
( MonadRandom(..)
) where
import Data.Proxy
import Basement.Imports
import Foundation.System.Entropy
import qualified Basement.UArray as A
-- | A monad constraint that allows to generate random bytes
class (Functor m, Applicative m, Monad m) => MonadRandom m where
getRandomBytes :: CountOf Word8 -> m (UArray Word8)
getRandomWord64 :: m Word64
getRandomF32 :: m Float
getRandomF64 :: m Double
instance MonadRandom IO where
getRandomBytes = getEntropy
getRandomWord64 = flip A.index 0 . A.unsafeRecast
<$> getRandomBytes (A.primSizeInBytes (Proxy :: Proxy Word64))
getRandomF32 = flip A.index 0 . A.unsafeRecast
<$> getRandomBytes (A.primSizeInBytes (Proxy :: Proxy Word64))
getRandomF64 = flip A.index 0 . A.unsafeRecast
<$> getRandomBytes (A.primSizeInBytes (Proxy :: Proxy Word64))
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