module Happstack.Util.HostAddress (showHostAddress, showHostAddress6, HostAddress, HostAddress6) where
import Data.Word (Word32)
import Numeric (showHex)
import Data.List (intersperse)
type HostAddress = Word32
type HostAddress6 = (Word32, Word32, Word32, Word32)
showHostAddress :: HostAddress -> String
showHostAddress num = concat [show q1, ".", show q2, ".", show q3, ".", show q4]
where (num',q1) = (num `quotRem` 256)
(num'',q2) = (num' `quotRem` 256)
(num''',q3) = (num'' `quotRem` 256)
(_,q4) = (num''' `quotRem` 256)
showHostAddress6 :: HostAddress6 -> String
showHostAddress6 (a,b,c,d) =
(concat . intersperse ":" . map (flip showHex $ "")) $
[p1,p2,p3,p4,p5,p6,p7,p8]
where (a',p2) = (a `quotRem` 65536)
(_,p1) = (a' `quotRem` 65536)
(b',p4) = (b `quotRem` 65536)
(_,p3) = (b' `quotRem` 65536)
(c',p6) = (c `quotRem` 65536)
(_,p5) = (c' `quotRem` 65536)
(d',p8) = (d `quotRem` 65536)
(_,p7) = (d' `quotRem` 65536)