Codec.Binary.Xx

Xxencoding is obsolete but still included for completeness. Further information on the encoding can be found at http://en.wikipedia.org/wiki/Xxencode. It should be noted that this implementation performs no padding, due to the splitting up between encoding and chopping.

Further documentation and information can be found at http://www.haskell.org/haskellwiki/Library/Data_encoding.

Documentation

encode :: [Word8] -> String

Encode data.

decode :: String -> Maybe [Word8]

Decode data (strict).

decode' :: String -> [Maybe Word8]

Decode data (lazy).

chop

Arguments

:: Int

length (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 xxencode "specificiation".

Notes:

• 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.

unchop :: [String] -> String

Concatenate the strings into one long string. Each string is assumed to be prepended with the length according to the xxencode specification.