{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DerivingVia #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE UndecidableInstances #-}

module Grisette.Core.Data.Class.SymShift
  ( SymShift (..),
    DefaultFiniteBitsSymShift (..),
  )
where

import Data.Bits (Bits (isSigned, shift), FiniteBits (finiteBitSize))
import Data.Int (Int16, Int32, Int64, Int8)
import Data.Word (Word16, Word32, Word64, Word8)

class (Bits a) => SymShift a where
  symShift :: a -> a -> a

instance SymShift Int where
  symShift :: Int -> Int -> Int
symShift Int
a Int
s
    | Int
s Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
>= Int -> Int
forall b. FiniteBits b => b -> Int
finiteBitSize Int
s = Int
0
    | Int
s Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
<= -Int -> Int
forall b. FiniteBits b => b -> Int
finiteBitSize Int
s = if Int
a Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
>= Int
0 then Int
0 else -Int
1
    | Bool
otherwise = Int -> Int -> Int
forall a. Bits a => a -> Int -> a
shift Int
a Int
s

newtype DefaultFiniteBitsSymShift a = DefaultFiniteBitsSymShift
  { forall a. DefaultFiniteBitsSymShift a -> a
unDefaultFiniteBitsSymShift :: a
  }
  deriving newtype (DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a -> Bool
(DefaultFiniteBitsSymShift a
 -> DefaultFiniteBitsSymShift a -> Bool)
-> (DefaultFiniteBitsSymShift a
    -> DefaultFiniteBitsSymShift a -> Bool)
-> Eq (DefaultFiniteBitsSymShift a)
forall a.
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DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
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DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a -> Bool
== :: DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a -> Bool
$c/= :: forall a.
Eq a =>
DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a -> Bool
/= :: DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a -> Bool
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DefaultFiniteBitsSymShift a
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-> Bits (DefaultFiniteBitsSymShift a)
Int -> DefaultFiniteBitsSymShift a
DefaultFiniteBitsSymShift a -> Bool
DefaultFiniteBitsSymShift a -> Int
DefaultFiniteBitsSymShift a -> Maybe Int
DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a
DefaultFiniteBitsSymShift a -> Int -> Bool
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
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forall a.
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forall a. Bits a => DefaultFiniteBitsSymShift a -> Int
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forall a.
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forall a. Bits a => DefaultFiniteBitsSymShift a -> Int -> Bool
forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
forall a.
Bits a =>
DefaultFiniteBitsSymShift a
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$c.&. :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a
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.&. :: DefaultFiniteBitsSymShift a
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$c.|. :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a
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.|. :: DefaultFiniteBitsSymShift a
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$cxor :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a
-> DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a
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-> DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a
$ccomplement :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a
complement :: DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a
$cshift :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
shift :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$crotate :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
rotate :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$czeroBits :: forall a. Bits a => DefaultFiniteBitsSymShift a
zeroBits :: DefaultFiniteBitsSymShift a
$cbit :: forall a. Bits a => Int -> DefaultFiniteBitsSymShift a
bit :: Int -> DefaultFiniteBitsSymShift a
$csetBit :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
setBit :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$cclearBit :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
clearBit :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$ccomplementBit :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
complementBit :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$ctestBit :: forall a. Bits a => DefaultFiniteBitsSymShift a -> Int -> Bool
testBit :: DefaultFiniteBitsSymShift a -> Int -> Bool
$cbitSizeMaybe :: forall a. Bits a => DefaultFiniteBitsSymShift a -> Maybe Int
bitSizeMaybe :: DefaultFiniteBitsSymShift a -> Maybe Int
$cbitSize :: forall a. Bits a => DefaultFiniteBitsSymShift a -> Int
bitSize :: DefaultFiniteBitsSymShift a -> Int
$cisSigned :: forall a. Bits a => DefaultFiniteBitsSymShift a -> Bool
isSigned :: DefaultFiniteBitsSymShift a -> Bool
$cshiftL :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
shiftL :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$cunsafeShiftL :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
unsafeShiftL :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$cshiftR :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
shiftR :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$cunsafeShiftR :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
unsafeShiftR :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$crotateL :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
rotateL :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$crotateR :: forall a.
Bits a =>
DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
rotateR :: DefaultFiniteBitsSymShift a -> Int -> DefaultFiniteBitsSymShift a
$cpopCount :: forall a. Bits a => DefaultFiniteBitsSymShift a -> Int
popCount :: DefaultFiniteBitsSymShift a -> Int
Bits)

instance
  (Integral a, FiniteBits a) =>
  SymShift (DefaultFiniteBitsSymShift a)
  where
  symShift :: DefaultFiniteBitsSymShift a
-> DefaultFiniteBitsSymShift a -> DefaultFiniteBitsSymShift a
symShift (DefaultFiniteBitsSymShift a
a) (DefaultFiniteBitsSymShift a
s)
    | a -> Bool
forall a. Bits a => a -> Bool
isSigned a
a = a -> DefaultFiniteBitsSymShift a
forall a. a -> DefaultFiniteBitsSymShift a
DefaultFiniteBitsSymShift (a -> DefaultFiniteBitsSymShift a)
-> a -> DefaultFiniteBitsSymShift a
forall a b. (a -> b) -> a -> b
$ a -> a -> a
forall a. (Integral a, FiniteBits a) => a -> a -> a
symShiftSigned a
a a
s
    | Bool
otherwise = a -> DefaultFiniteBitsSymShift a
forall a. a -> DefaultFiniteBitsSymShift a
DefaultFiniteBitsSymShift (a -> DefaultFiniteBitsSymShift a)
-> a -> DefaultFiniteBitsSymShift a
forall a b. (a -> b) -> a -> b
$ a -> a -> a
forall a. (Integral a, FiniteBits a) => a -> a -> a
symShiftUnsigned a
a a
s
    where
      symShiftUnsigned :: (Integral a, FiniteBits a) => a -> a -> a
      symShiftUnsigned :: forall a. (Integral a, FiniteBits a) => a -> a -> a
symShiftUnsigned a
a a
s | a
s a -> a -> Bool
forall a. Ord a => a -> a -> Bool
>= Int -> a
forall a b. (Integral a, Num b) => a -> b
fromIntegral (a -> Int
forall b. FiniteBits b => b -> Int
finiteBitSize a
a) = a
0
      symShiftUnsigned a
a a
s = a -> Int -> a
forall a. Bits a => a -> Int -> a
shift a
a (a -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral a
s)

      symShiftSigned :: (Integral a, FiniteBits a) => a -> a -> a
      symShiftSigned :: forall a. (Integral a, FiniteBits a) => a -> a -> a
symShiftSigned a
a a
s | a -> Int
forall b. FiniteBits b => b -> Int
finiteBitSize a
s Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
1 = a
a
      symShiftSigned a
a a
s
        | a -> Int
forall b. FiniteBits b => b -> Int
finiteBitSize a
s Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
2 =
            if a
s a -> a -> Bool
forall a. Eq a => a -> a -> Bool
== -a
2
              then if a
a a -> a -> Bool
forall a. Ord a => a -> a -> Bool
< a
0 then -a
1 else a
0
              else a -> Int -> a
forall a. Bits a => a -> Int -> a
shift a
a (a -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral a
s)
      symShiftSigned a
a a
s | a
s a -> a -> Bool
forall a. Ord a => a -> a -> Bool
>= Int -> a
forall a b. (Integral a, Num b) => a -> b
fromIntegral (a -> Int
forall b. FiniteBits b => b -> Int
finiteBitSize a
a) = a
0
      symShiftSigned a
a a
s
        | a
s a -> a -> Bool
forall a. Ord a => a -> a -> Bool
<= Int -> a
forall a b. (Integral a, Num b) => a -> b
fromIntegral (-a -> Int
forall b. FiniteBits b => b -> Int
finiteBitSize a
a) =
            if a
a a -> a -> Bool
forall a. Ord a => a -> a -> Bool
< a
0 then -a
1 else a
0
      symShiftSigned a
a a
s = a -> Int -> a
forall a. Bits a => a -> Int -> a
shift a
a (a -> Int
forall a b. (Integral a, Num b) => a -> b
fromIntegral a
s)

deriving via (DefaultFiniteBitsSymShift Int8) instance SymShift Int8

deriving via (DefaultFiniteBitsSymShift Int16) instance SymShift Int16

deriving via (DefaultFiniteBitsSymShift Int32) instance SymShift Int32

deriving via (DefaultFiniteBitsSymShift Int64) instance SymShift Int64

deriving via (DefaultFiniteBitsSymShift Word8) instance SymShift Word8

deriving via (DefaultFiniteBitsSymShift Word16) instance SymShift Word16

deriving via (DefaultFiniteBitsSymShift Word32) instance SymShift Word32

deriving via (DefaultFiniteBitsSymShift Word64) instance SymShift Word64

deriving via (DefaultFiniteBitsSymShift Word) instance SymShift Word