length -package:vector package:memory

length :: ByteArrayAccess ba => ba -> Int
memory Data.ByteArray
Return the length in bytes of a bytearray
unBase32Length :: Ptr Word8 -> Int -> IO (Maybe Int)
memory Data.Memory.Encoding.Base32
Get the length needed for the destination buffer for a base32 decoding. if the length is not a multiple of 8, Nothing is returned
unBase64Length :: Ptr Word8 -> Int -> IO (Maybe Int)
memory Data.Memory.Encoding.Base64
Get the length needed for the destination buffer for a base64 decoding. if the length is not a multiple of 4, Nothing is returned
unBase64LengthUnpadded :: Int -> Maybe Int
memory Data.Memory.Encoding.Base64
Get the length needed for the destination buffer for an unpadded base64 decoding. If the length of the encoded string is a multiple of 4, plus one, Nothing is returned. Any other value can be valid without padding.