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bundled/Basement/IntegralConv.hs
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235
bundled/Basement/IntegralConv.hs
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{-# LANGUAGE BangPatterns #-}
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{-# LANGUAGE DeriveDataTypeable #-}
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{-# LANGUAGE TypeFamilies #-}
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{-# LANGUAGE RebindableSyntax #-}
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{-# LANGUAGE NoImplicitPrelude #-}
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE MagicHash #-}
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{-# LANGUAGE DefaultSignatures #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE UnboxedTuples #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE GADTs #-}
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{-# LANGUAGE TypeOperators #-}
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module Basement.IntegralConv
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( IntegralDownsize(..)
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, IntegralUpsize(..)
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, intToInt64
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, int64ToInt
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, wordToWord64
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, word64ToWord32s
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, Word32x2(..)
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, word64ToWord
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, wordToChar
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, wordToInt
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, charToInt
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) where
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import GHC.Types
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import GHC.Prim hiding (word64ToWord#)
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import qualified GHC.Prim
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import GHC.Int
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import GHC.Word
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import Prelude (Integer, fromIntegral)
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import Basement.Compat.Base
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import Basement.Compat.Natural
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import Basement.Compat.Primitive
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import Basement.Numerical.Number
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import Basement.Numerical.Conversion
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-- | Downsize an integral value
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class IntegralDownsize a b where
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integralDownsize :: a -> b
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default integralDownsize :: a ~ b => a -> b
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integralDownsize = id
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integralDownsizeCheck :: a -> Maybe b
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-- | Upsize an integral value
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--
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-- The destination type 'b' size need to be greater or equal
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-- than the size type of 'a'
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class IntegralUpsize a b where
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integralUpsize :: a -> b
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integralDownsizeBounded :: forall a b . (Ord a, Bounded b, IntegralDownsize a b, IntegralUpsize b a)
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=> (a -> b)
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-> a
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-> Maybe b
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integralDownsizeBounded aToB x
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| x < integralUpsize (minBound :: b) && x > integralUpsize (maxBound :: b) = Nothing
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| otherwise = Just (aToB x)
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instance IsIntegral a => IntegralUpsize a Integer where
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integralUpsize = toInteger
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instance IsNatural a => IntegralUpsize a Natural where
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integralUpsize = toNatural
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instance IntegralUpsize Int8 Int16 where
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integralUpsize (I8# i) = I16# (int8ToInt16# i)
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instance IntegralUpsize Int8 Int32 where
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integralUpsize (I8# i) = I32# (int8ToInt32# i)
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instance IntegralUpsize Int8 Int64 where
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integralUpsize (I8# i) = intToInt64 (I# (int8ToInt# i))
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instance IntegralUpsize Int8 Int where
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integralUpsize (I8# i) = I# (int8ToInt# i)
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instance IntegralUpsize Int16 Int32 where
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integralUpsize (I16# i) = I32# (int16ToInt32# i)
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instance IntegralUpsize Int16 Int64 where
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integralUpsize (I16# i) = intToInt64 (I# (int16ToInt# i))
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instance IntegralUpsize Int16 Int where
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integralUpsize (I16# i) = I# (int16ToInt# i)
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instance IntegralUpsize Int32 Int64 where
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integralUpsize (I32# i) = intToInt64 (I# (int32ToInt# i))
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instance IntegralUpsize Int32 Int where
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integralUpsize (I32# i) = I# (int32ToInt# i)
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instance IntegralUpsize Int Int64 where
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integralUpsize = intToInt64
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instance IntegralUpsize Word8 Word16 where
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integralUpsize (W8# i) = W16# (word8ToWord16# i)
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instance IntegralUpsize Word8 Word32 where
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integralUpsize (W8# i) = W32# (word8ToWord32# i)
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instance IntegralUpsize Word8 Word64 where
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integralUpsize (W8# i) = wordToWord64 (W# (word8ToWord# i))
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instance IntegralUpsize Word8 Word where
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integralUpsize (W8# i) = W# (word8ToWord# i)
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instance IntegralUpsize Word8 Int16 where
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integralUpsize (W8# w) = I16# (word8ToInt16# w)
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instance IntegralUpsize Word8 Int32 where
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integralUpsize (W8# w) = I32# (word8ToInt32# w)
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instance IntegralUpsize Word8 Int64 where
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integralUpsize (W8# w) = intToInt64 (I# (word2Int# (word8ToWord# w)))
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instance IntegralUpsize Word8 Int where
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integralUpsize (W8# w) = I# (word2Int# (word8ToWord# w))
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instance IntegralUpsize Word16 Word32 where
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integralUpsize (W16# i) = W32# (word16ToWord32# i)
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instance IntegralUpsize Word16 Word64 where
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integralUpsize (W16# i) = wordToWord64 (W# (word16ToWord# i))
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instance IntegralUpsize Word16 Word where
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integralUpsize (W16# i) = W# (word16ToWord# i)
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instance IntegralUpsize Word32 Word64 where
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integralUpsize (W32# i) = wordToWord64 (W# (word32ToWord# i))
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instance IntegralUpsize Word32 Word where
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integralUpsize (W32# i) = W# (word32ToWord# i)
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instance IntegralUpsize Word Word64 where
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integralUpsize = wordToWord64
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instance IntegralDownsize Int Int8 where
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integralDownsize (I# i) = I8# (intToInt8# i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Int Int16 where
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integralDownsize (I# i) = I16# (intToInt16# i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Int Int32 where
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integralDownsize (I# i) = I32# (intToInt32# i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Int64 Int8 where
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integralDownsize i = integralDownsize (int64ToInt i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Int64 Int16 where
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integralDownsize i = integralDownsize (int64ToInt i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Int64 Int32 where
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integralDownsize i = integralDownsize (int64ToInt i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Int64 Int where
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integralDownsize i = int64ToInt i
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word64 Word8 where
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#if __GLASGOW_HASKELL__ >= 904
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integralDownsize (W64# i) = W8# (wordToWord8# (GHC.Prim.word64ToWord# i))
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#else
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integralDownsize (W64# i) = W8# (wordToWord8# (word64ToWord# i))
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#endif
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word64 Word16 where
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#if __GLASGOW_HASKELL__ >= 904
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integralDownsize (W64# i) = W16# (wordToWord16# (GHC.Prim.word64ToWord# i))
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#else
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integralDownsize (W64# i) = W16# (wordToWord16# (word64ToWord# i))
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#endif
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word64 Word32 where
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#if __GLASGOW_HASKELL__ >= 904
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integralDownsize (W64# i) = W32# (wordToWord32# (GHC.Prim.word64ToWord# i))
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#else
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integralDownsize (W64# i) = W32# (wordToWord32# (word64ToWord# i))
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#endif
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word Word8 where
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integralDownsize (W# w) = W8# (wordToWord8# w)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word Word16 where
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integralDownsize (W# w) = W16# (wordToWord16# w)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word Word32 where
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integralDownsize (W# w) = W32# (wordToWord32# w)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word32 Word8 where
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integralDownsize (W32# i) = W8# (word32ToWord8# i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word32 Word16 where
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integralDownsize (W32# i) = W16# (word32ToWord16# i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Word16 Word8 where
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integralDownsize (W16# i) = W8# (word16ToWord8# i)
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Int8 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Int16 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Int32 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Int64 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Word8 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Word16 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Word32 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Word64 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Integer Natural where
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integralDownsize i
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| i >= 0 = fromIntegral i
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| otherwise = 0
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integralDownsizeCheck i
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| i >= 0 = Just (fromIntegral i)
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| otherwise = Nothing
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instance IntegralDownsize Natural Word8 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Natural Word16 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Natural Word32 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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instance IntegralDownsize Natural Word64 where
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integralDownsize = fromIntegral
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integralDownsizeCheck = integralDownsizeBounded integralDownsize
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