From 63f9aba33b45e5bab688ffaa5e4182801c152828 Mon Sep 17 00:00:00 2001 From: Joey Hess Date: Mon, 26 Jun 2017 12:15:27 -0400 Subject: merge from git-annex Removes dependency on MissingH, adding a dependency on split instead. This commit was sponsored by Brock Spratlen on Patreon. --- Utility/Percentage.hs | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Utility/Percentage.hs (limited to 'Utility/Percentage.hs') diff --git a/Utility/Percentage.hs b/Utility/Percentage.hs new file mode 100644 index 0000000..a30c260 --- /dev/null +++ b/Utility/Percentage.hs @@ -0,0 +1,33 @@ +{- percentages + - + - Copyright 2012 Joey Hess + - + - License: BSD-2-clause + -} + +module Utility.Percentage ( + Percentage, + percentage, + showPercentage +) where + +import Data.Ratio + +import Utility.HumanNumber + +newtype Percentage = Percentage (Ratio Integer) + +instance Show Percentage where + show = showPercentage 0 + +{- Normally the big number comes first. But 110% is allowed if desired. :) -} +percentage :: Integer -> Integer -> Percentage +percentage 0 _ = Percentage 0 +percentage full have = Percentage $ have * 100 % full + +{- Pretty-print a Percentage, with a specified level of precision. -} +showPercentage :: Int -> Percentage -> String +showPercentage precision (Percentage p) = v ++ "%" + where + v = showImprecise precision n + n = fromRational p :: Double -- cgit v1.2.3