From 7a1c3ed2cc24df85303f66f23830bdaf8cd9dced Mon Sep 17 00:00:00 2001
From: nareix <hi.nareix@gmail.com>
Date: Wed, 9 Mar 2016 01:26:25 +0800
Subject: [PATCH] add Prepend() for iovec

---
 vecio.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/vecio.go b/vecio.go
index 8256d03..2334188 100644
--- a/vecio.go
+++ b/vecio.go
@@ -17,6 +17,11 @@ type iovec struct {
 	idx int
 }
 
+func (self *iovec) Prepend(b []byte) {
+	self.data = append([][]byte{b}, self.data...)
+	self.Len += len(b)
+}
+
 func (self *iovec) Append(b []byte) {
 	self.data = append(self.data, b)
 	self.Len += len(b)