module Data.SBV.BitVectors.PrettyNum (PrettyNum(..), readBin, shex, sbin) where
import Data.Char (ord)
import Data.Int (Int8, Int16, Int32, Int64)
import Data.List (isPrefixOf)
import Data.Maybe (fromJust)
import Data.Word (Word8, Word16, Word32, Word64)
import Numeric (showIntAtBase, showHex, readInt)
import Data.SBV.BitVectors.Data
import Data.SBV.BitVectors.Model ()
class PrettyNum a where
hexS :: a -> String
binS :: a -> String
hex :: a -> String
bin :: a -> String
instance PrettyNum Bool where
{hexS = show; binS = show; hex = show; bin = show}
instance PrettyNum Word8 where
{hexS = shex True True (False,8) ; binS = sbin True True (False,8) ; hex = shex False False (False,8) ; bin = sbin False False (False,8) ;}
instance PrettyNum Int8 where
{hexS = shex True True (True,8) ; binS = sbin True True (True,8) ; hex = shex False False (True,8) ; bin = sbin False False (True,8) ;}
instance PrettyNum Word16 where
{hexS = shex True True (False,16); binS = sbin True True (False,16); hex = shex False False (False,16); bin = sbin False False (False,16);}
instance PrettyNum Int16 where
{hexS = shex True True (True,16); binS = sbin True True (True,16) ; hex = shex False False (True,16); bin = sbin False False (True,16) ;}
instance PrettyNum Word32 where
{hexS = shex True True (False,32); binS = sbin True True (False,32); hex = shex False False (False,32); bin = sbin False False (False,32);}
instance PrettyNum Int32 where
{hexS = shex True True (True,32); binS = sbin True True (True,32) ; hex = shex False False (True,32); bin = sbin False False (True,32) ;}
instance PrettyNum Word64 where
{hexS = shex True True (False,64); binS = sbin True True (False,64); hex = shex False False (False,64); bin = sbin False False (False,64);}
instance PrettyNum Int64 where
{hexS = shex True True (True,64); binS = sbin True True (True,64) ; hex = shex False False (True,64); bin = sbin False False (True,64) ;}
instance PrettyNum CW where
hexS cw | cwIsBit cw = hexS (cwToBool cw)
hexS cw = shex True True (hasSign cw, sizeOf cw) (cwVal cw)
binS cw | cwIsBit cw = binS (cwToBool cw)
binS cw = sbin True True (hasSign cw, sizeOf cw) (cwVal cw)
hex cw | cwIsBit cw = hexS (cwToBool cw)
hex cw = shex False False (hasSign cw, sizeOf cw) (cwVal cw)
bin cw | cwIsBit cw = binS (cwToBool cw)
bin cw = sbin False False (hasSign cw, sizeOf cw) (cwVal cw)
instance (SymWord a, PrettyNum a) => PrettyNum (SBV a) where
hexS s = maybe (show s) (hexS :: a -> String) $ unliteral s
binS s = maybe (show s) (binS :: a -> String) $ unliteral s
hex s = maybe (show s) (hex :: a -> String) $ unliteral s
bin s = maybe (show s) (bin :: a -> String) $ unliteral s
shex :: (Integral a) => Bool -> Bool -> (Bool, Size) -> a -> String
shex shType shPre (signed, size) a
| a < 0
= "-" ++ pre ++ pad l (s16 (abs ((fromIntegral a) :: Integer))) ++ t
| True
= pre ++ pad l (s16 a) ++ t
where t | shType = " :: " ++ (if signed then "Int" else "Word") ++ show size
| True = ""
pre | shPre = "0x"
| True = ""
l = (size + 3) `div` 4
sbin :: (Integral a) => Bool -> Bool -> (Bool, Size) -> a -> String
sbin shType shPre (signed,size) a
| a < 0
= "-" ++ pre ++ pad size (s2 (abs ((fromIntegral a) :: Integer))) ++ t
| True
= pre ++ pad size (s2 a) ++ t
where t | shType = " :: " ++ (if signed then "Int" else "Word") ++ show size
| True = ""
pre | shPre = "0b"
| True = ""
pad :: Int -> String -> String
pad l s = replicate (l length s) '0' ++ s
s2, s16 :: Integral a => a -> String
s2 v = showIntAtBase 2 dig v "" where dig = fromJust . flip lookup [(0, '0'), (1, '1')]
s16 v = showHex v ""
readBin :: Num a => String -> a
readBin ('-':s) = (readBin s)
readBin s = case readInt 2 isDigit cvt s' of
[(a, "")] -> a
_ -> error $ "SBV.readBin: Cannot read a binary number from: " ++ show s
where cvt c = ord c ord '0'
isDigit = (`elem` "01")
s' | "0b" `isPrefixOf` s = drop 2 s
| True = s