git-annex/Utility/Base64.hs
Magnus Therning 8ab56a5cf2 Replace dataenc with sandi.
The library dataenc is unmaintained and has been superseded by sandi.

Signed-off-by: Magnus Therning <magnus@therning.org>
2015-05-07 18:07:05 -04:00

27 lines
724 B
Haskell

{- Simple Base64 encoding of Strings
-
- Copyright 2011, 2015 Joey Hess <id@joeyh.name>
-
- License: BSD-2-clause
-}
module Utility.Base64 (toB64, fromB64Maybe, fromB64, prop_b64_roundtrips) where
import qualified "sandi" Codec.Binary.Base64 as B64
import Data.Maybe
import Data.ByteString.UTF8 (fromString, toString)
toB64 :: String -> String
toB64 = toString . B64.encode . fromString
fromB64Maybe :: String -> Maybe String
fromB64Maybe s = either (const Nothing) (Just . toString)
(B64.decode $ fromString s)
fromB64 :: String -> String
fromB64 = fromMaybe bad . fromB64Maybe
where
bad = error "bad base64 encoded data"
prop_b64_roundtrips :: String -> Bool
prop_b64_roundtrips s = s == fromB64 (toB64 s)