From bb2e32175b833e8a9d76ed7d7aa86440fbe22fe0 Mon Sep 17 00:00:00 2001
From: qiuyesuifeng <cuiqiu.bupt@gmail.com>
Date: Mon, 9 Nov 2015 15:39:39 +0800
Subject: [PATCH] util: tiny refactor RoundFloat function.

---
 util/types/helper.go | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/util/types/helper.go b/util/types/helper.go
index eeb12b9127..b9b0817f3b 100644
--- a/util/types/helper.go
+++ b/util/types/helper.go
@@ -21,19 +21,11 @@ import (
 // RoundFloat uses default rounding mode, see http://www.gnu.org/software/libc/manual/html_node/Rounding.html
 // so we will choose the even number if the result is midway between two representable value.
 // e.g, 1.5 -> 2, 2.5 -> 2.
-func RoundFloat(val float64) float64 {
-	v, frac := math.Modf(val)
-	if val >= 0.0 {
-		if frac > 0.5 || (frac == 0.5 && uint64(v)%2 != 0) {
-			v += 1.0
-		}
-	} else {
-		if frac < -0.5 || (frac == -0.5 && uint64(math.Abs(v))%2 != 0) {
-			v -= 1.0
-		}
+func RoundFloat(f float64) float64 {
+	if math.Remainder(f, 1.0) < 0 {
+		return math.Ceil(f)
 	}
-
-	return v
+	return math.Floor(f)
 }
 
 func getMaxFloat(flen int, decimal int) float64 {