module Data.Primitive.Ptr.BigEndian
(
writeOffPtr
, readOffPtr
, indexOffPtr
) where
import Data.Primitive (Prim)
import Data.Primitive.Ptr (Ptr)
import Control.Monad.Primitive (PrimMonad)
import System.ByteOrder (Bytes,toBigEndian,fromBigEndian)
import qualified Data.Primitive.Ptr as PM
writeOffPtr :: (PrimMonad m, Prim a, Bytes a) => Ptr a -> Int -> a -> m ()
writeOffPtr :: Ptr a -> Int -> a -> m ()
writeOffPtr Ptr a
arr Int
ix a
v = Ptr a -> Int -> a -> m ()
forall a (m :: * -> *).
(Prim a, PrimMonad m) =>
Ptr a -> Int -> a -> m ()
PM.writeOffPtr Ptr a
arr Int
ix (a -> a
forall a. Bytes a => a -> a
toBigEndian a
v)
readOffPtr :: (PrimMonad m, Prim a, Bytes a) => Ptr a -> Int -> m a
readOffPtr :: Ptr a -> Int -> m a
readOffPtr Ptr a
arr Int
ix = a -> a
forall a. Bytes a => a -> a
fromBigEndian (a -> a) -> m a -> m a
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Ptr a -> Int -> m a
forall a (m :: * -> *).
(Prim a, PrimMonad m) =>
Ptr a -> Int -> m a
PM.readOffPtr Ptr a
arr Int
ix
indexOffPtr :: (Prim a, Bytes a) => Ptr a -> Int -> a
indexOffPtr :: Ptr a -> Int -> a
indexOffPtr Ptr a
arr Int
ix = a -> a
forall a. Bytes a => a -> a
fromBigEndian (Ptr a -> Int -> a
forall a. Prim a => Ptr a -> Int -> a
PM.indexOffPtr Ptr a
arr Int
ix)