dataenc- Data encoding librarySource codeContentsIndex

Uuencoding is notoriously badly specified. This implementation is compatible with the GNU Sharutils (

Further documentation and information can be found at

encode :: [Word8] -> String
decode :: String -> Maybe [Word8]
decode' :: String -> [Maybe Word8]
chop :: Int -> String -> [String]
unchop :: [String] -> String
encode :: [Word8] -> StringSource
Encode data.
decode :: String -> Maybe [Word8]Source
Decode data (strict).
decode' :: String -> [Maybe Word8]Source
Decode data (lazy).
:: Intlength (value should be in the range [5..85])
-> String
-> [String]

Chop up a string in parts. Each string in the resulting list is prepended with the length according to the uuencode "specificiation".


  • The length of the strings in the result will be (n -1) div 4 * 4 + 1. The -1 comes from the need to prepend the length (which explains the final +1). Keeping it to a multiple of 4 means that strings returned from encode can be chopped without requiring any changes.
  • The length of lines in GNU's sharutils is 61.
unchop :: [String] -> StringSource
Concatenate the strings into one long string. Each string is assumed to be prepended with the length according to the uuencode specification.
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