From d3d9381f09fba70b0d622815b797358c6bcdc548 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@kitenet.net>
Date: Fri, 19 Jul 2013 19:39:14 -0400
Subject: refactor and unify code

This fixes several bugs in both modules.
---
 Utility/HumanNumber.hs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 Utility/HumanNumber.hs

(limited to 'Utility/HumanNumber.hs')

diff --git a/Utility/HumanNumber.hs b/Utility/HumanNumber.hs
new file mode 100644
index 000000000..904135987
--- /dev/null
+++ b/Utility/HumanNumber.hs
@@ -0,0 +1,21 @@
+{- numbers for humans
+ -
+ - Copyright 2012-2013 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Utility.HumanNumber where
+
+{- Displays a fractional value as a string with a limited number
+ - of decimal digits. -}
+showImprecise :: RealFrac a => Int -> a -> String
+showImprecise precision n
+	| precision == 0 || remainder == 0 = show (round n :: Integer)
+	| otherwise = show int ++ "." ++ striptrailing0s (pad0s $ show remainder)
+  where
+	int :: Integer
+	(int, frac) = properFraction n
+	remainder = round (frac * 10 ^ precision) :: Integer
+	pad0s s = (take (precision - length s) (repeat '0')) ++ s
+	striptrailing0s = reverse . dropWhile (== '0') . reverse
-- 
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