From fb2acb93602d54a9be9ff735bcabbe17a66cb876 Mon Sep 17 00:00:00 2001
From: joeybloggs <Dean.Karn@gmail.com>
Date: Fri, 12 Aug 2016 22:28:58 -0400
Subject: add FmtPercent logic.

---
 nl_SR/nl_SR.go | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

(limited to 'nl_SR')

diff --git a/nl_SR/nl_SR.go b/nl_SR/nl_SR.go
index 5f5372ec..f1a2b19a 100644
--- a/nl_SR/nl_SR.go
+++ b/nl_SR/nl_SR.go
@@ -134,3 +134,45 @@ func (nl *nl_SR) FmtNumber(num float64, v uint64) []byte {
 
 	return b
 }
+
+// FmtPercent returns 'num' with digits/precision of 'v' for 'nl_SR' and handles both Whole and Real numbers based on 'v'
+// returned as a []byte just in case the caller wishes to add more and can help
+// avoid allocations; otherwise just cast as string.
+// NOTE: 'num' passed into FmtPercent is assumed to be in percent already
+func (nl *nl_SR) FmtPercent(num float64, v uint64) []byte {
+
+	s := strconv.FormatFloat(math.Abs(num), 'f', int(v), 64)
+	l := len(s) + len(nl.decimal)
+
+	b := make([]byte, 0, l)
+
+	for i := len(s) - 1; i >= 0; i-- {
+
+		if s[i] == '.' {
+			for j := len(nl.decimal) - 1; j >= 0; j-- {
+				b = append(b, nl.decimal[j])
+			}
+
+			continue
+		}
+
+		b = append(b, s[i])
+	}
+
+	if num < 0 {
+		for j := len(nl.minus) - 1; j >= 0; j-- {
+			b = append(b, nl.minus[j])
+		}
+	}
+
+	// reverse
+	for i, j := 0, len(b)-1; i < j; i, j = i+1, j-1 {
+		b[i], b[j] = b[j], b[i]
+	}
+
+	for j := len(nl.percent) - 1; j >= 0; j-- {
+		b = append(b, nl.percent[j])
+	}
+
+	return b
+}
-- 
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