{-# LANGUAGE CPP #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
{-|
Module:      TextShow.GHC.Fingerprint
Copyright:   (C) 2014-2017 Ryan Scott
License:     BSD-style (see the file LICENSE)
Maintainer:  Ryan Scott
Stability:   Provisional
Portability: GHC

'TextShow' instance for 'Fingerprint'.

/Since: 2/
-}
module TextShow.GHC.Fingerprint () where

import Data.Semigroup.Compat (mtimesDefault)
import Data.Text.Lazy.Builder (Builder, singleton)
import Data.Word (Word64)

import GHC.Fingerprint.Type (Fingerprint(..))

import Prelude ()
import Prelude.Compat

import TextShow.Classes (TextShow(..))
import TextShow.Data.Integral (showbHex)
import TextShow.Utils (lengthB)

-- | /Since: 2/
instance TextShow Fingerprint where
    showb :: Fingerprint -> Builder
showb (Fingerprint Word64
w1 Word64
w2) = Word64 -> Builder
hex16 Word64
w1 forall a. Semigroup a => a -> a -> a
<> Word64 -> Builder
hex16 Word64
w2
      where
        hex16 :: Word64 -> Builder
        hex16 :: Word64 -> Builder
hex16 Word64
i = let hex :: Builder
hex = forall a. (Integral a, TextShow a) => a -> Builder
showbHex Word64
i
                  in forall b a. (Integral b, Monoid a) => b -> a -> a
mtimesDefault (forall a. Ord a => a -> a -> a
max Int64
0 forall a b. (a -> b) -> a -> b
$ Int64
16 forall a. Num a => a -> a -> a
- Builder -> Int64
lengthB Builder
hex) (Char -> Builder
singleton Char
'0') forall a. Semigroup a => a -> a -> a
<> Builder
hex