error handling for decoding functions

Main.hs

@@ -143,18 +143,49 @@ enc64 input =
      Right byteString -> C.unpack byteString
      Left errMsg -> "Error: " ++ errMsg
 
-
+dec64url :: String -> String
 dec64url = C.unpack . U.fromRight . B64U.decode . BSU.fromString
+
+enc64url :: String -> String
 enc64url = C.unpack . B64U.encode . BSU.fromString
+
+
+decurl :: String -> String
 decurl = HB.urlDecode 
+
+encurl :: String -> String
 encurl = HB.urlEncode
+
 dec62 = show . fromJust . B62.decode128 . (Bytes.fromByteString . BSU.fromString)
 enc62 = C.unpack . BSU.fromString. Bytes.toLatinString . (Bytes.fromByteArray . ( B62.encode64 . (intToWord64 . decimalStringToInt)))
-dec58 = C.unpack . fromJust . B58.decodeBase58 . pack 
+
+dec58 :: String -> String
+-- dec58 = C.unpack . fromJust . B58.decodeBase58 . pack 
+dec58 input = 
+   case B58.decodeBase58 (pack input) of
+     Just decoded -> (C.unpack decoded)
+     Nothing -> "Error decoding Base58"
+
+enc58 :: String -> String
 enc58 = unpack . B58.encodeBase58 . BSU.fromString
-dec32 = C.unpack . U.fromRight . B32.decode . BSU.fromString
+
+dec32 :: String -> String
+-- dec32 = C.unpack . U.fromRight . B32.decode . BSU.fromString
+dec32 input =
+   case B32.decode (BSU.fromString input) of
+     Right decoded -> C.unpack decoded
+     Left _ -> "Error decoding Base32"
+
+enc32 :: String -> String
 enc32 = C.unpack . B32.encode . BSU.fromString
-dec16 = C.unpack . U.fromRight . B16.decode . BSU.fromString
+
+dec16 :: String -> String
+-- dec16 = C.unpack . U.fromRight . B16.decode . BSU.fromString
+dec16 input =
+   case B16.decode (BSU.fromString input) of
+     Right decoded -> C.unpack decoded
+     Left _ -> "Error decoding Base16"
+
 enc16 = C.unpack . B16.encode . BSU.fromString
 dec10 = show . hexStringToInt 
 enc10 = C.unpack . BSU.fromString . intToHexString . decimalStringToInt -- Depending on what you want,  do enc10 = show . map ord
@@ -162,13 +193,46 @@ dec8  = C.unpack . encodeUtf8 . toText . showbOct . hexStringToInt
 enc8  = C.unpack . BSU.fromString . intToHexString . octToInt . (reverse . (map fromJust . (map fromOctDigit)))
 dec2  = C.unpack . encodeUtf8 . toText . showbBin . hexStringToInt
 enc2  = C.unpack . BSU.fromString . intToHexString . binToInt . (reverse . (map fromJust . (map fromBinDigit)))
-decqp = C.unpack . U.fromRight . QP.decode . BSU.fromString
+
+decqp :: String -> String
+-- decqp = C.unpack . U.fromRight . QP.decode . BSU.fromString
+decqp input =
+   case QP.decode (BSU.fromString input) of
+     Right decoded -> C.unpack decoded
+     Left _ -> "Error decoding QP"
+
+encqp :: String -> String
 encqp = C.unpack . QP.encode . BSU.fromString
-decuu = C.unpack . U.fromRight . UU.decode . BSU.fromString
+
+decuu :: String -> String
+-- decuu = C.unpack . U.fromRight . UU.decode . BSU.fromString
+decuu input =
+   case UU.decode (BSU.fromString input) of
+     Right decoded -> C.unpack decoded
+     Left _ -> "Error decoding UU."
+
+encuu :: String -> String
 encuu = C.unpack . UU.encode . BSU.fromString
-decxx = C.unpack . U.fromRight . XX.decode . BSU.fromString
+
+decxx :: String -> String
+-- decxx = C.unpack . U.fromRight . XX.decode . BSU.fromString
+decxx input =
+   case XX.decode (BSU.fromString input) of
+     Right decoded -> C.unpack decoded
+     Left _ -> "Error decoding XX."
+
+encxx :: String -> String
 encxx = C.unpack . XX.encode . BSU.fromString
-decy  = C.unpack . U.fromRight . Y.decode . BSU.fromString
+
+decy :: String -> String
+-- decy  = C.unpack . U.fromRight . Y.decode . BSU.fromString
+decy input =
+   case Y.decode (BSU.fromString input) of
+     Right decoded -> C.unpack decoded
+     Left _ -> "Error decoding Y.\n"
+
+
+ency :: String -> String
 ency  = C.unpack . Y.encode  . BSU.fromString
        
 optionHandler Decode{b91=True} = dec91