From c683c73c489243e869b39888a37be827599d6879 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Sun, 21 Jun 2015 18:00:34 +0200
Subject: Show instance for level now has fixed precision for dB

---
 src/Trivmix.hs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/Trivmix.hs')

diff --git a/src/Trivmix.hs b/src/Trivmix.hs
index 0f84f62..cedc3e3 100644
--- a/src/Trivmix.hs
+++ b/src/Trivmix.hs
@@ -48,9 +48,14 @@ data Options = Options
 
 data Level = Lin Float | DB Float
 
+fixedPrecision :: (RealFrac a, Num a) => a -> a
+fixedPrecision x = (fromInteger $ round $ p * x) / p
+  where
+    p = 1e3
+
 instance Show Level where
   show (Lin x) = show x
-  show (DB x) = (show x') ++ "dB"
+  show (DB x) = (show $ fixedPrecision x') ++ "dB"
     where
       x' = 20 * (logBase 10 x)
 
-- 
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