module Data.SBV.BitVectors.PrettyNum (PrettyNum(..), readBin) 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 -> IO ()
hex = putStrLn . hexS
bin :: a -> IO ()
bin = putStrLn . binS
instance PrettyNum Bool where {hexS = show; binS = show}
instance PrettyNum Word8 where {hexS = shex (False,8) ; binS = sbin (False,8) }
instance PrettyNum Int8 where {hexS = shex (True,8) ; binS = sbin (True,8) }
instance PrettyNum Word16 where {hexS = shex (False,16); binS = sbin (False,16)}
instance PrettyNum Int16 where {hexS = shex (True,16); binS = sbin (True,16) }
instance PrettyNum Word32 where {hexS = shex (False,32); binS = sbin (False,32)}
instance PrettyNum Int32 where {hexS = shex (True,32); binS = sbin (True,32) }
instance PrettyNum Word64 where {hexS = shex (False,64); binS = sbin (False,64)}
instance PrettyNum Int64 where {hexS = shex (True,64); binS = sbin (True,64) }
instance PrettyNum CW where
hexS cw | cwIsBit cw = hexS (cwToBool cw)
hexS cw = shex (hasSign cw, sizeOf cw) (cwVal cw)
binS cw | cwIsBit cw = binS (cwToBool cw)
binS cw = sbin (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
shex :: (Integral a) => (Bool,Size) -> a -> String
shex (signed,size) a
| a < 0
= "-0x" ++ pad l (s16 (abs ((fromIntegral a) :: Integer))) ++ t
| True
= "0x" ++ pad l (s16 a) ++ t
where t = " :: " ++ (if signed then "Int" else "Word") ++ show size
l = (size + 3) `div` 4
sbin :: (Integral a) => (Bool,Size) -> a -> String
sbin (signed,size) a
| a < 0
= "-0b" ++ pad size (s2 (abs ((fromIntegral a) :: Integer))) ++ t
| True
= "0b" ++ pad size (s2 a) ++ t
where t = " :: " ++ (if signed then "Int" else "Word") ++ show size
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