From 9f0bea8a2940504b41c889ccd798e8a94448b21a Mon Sep 17 00:00:00 2001
From: xiaost <xiaost7@gmail.com>
Date: Thu, 7 Apr 2016 18:34:37 +0800
Subject: [PATCH] Tests: backport go1.6 rand.Read for speedup tests

---
 examples_test.go    | 10 +++++++---
 reedsolomon_test.go | 10 +++++++---
 streaming_test.go   |  8 ++------
 3 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/examples_test.go b/examples_test.go
index e44a0260..7ba7407c 100644
--- a/examples_test.go
+++ b/examples_test.go
@@ -11,9 +11,13 @@ import (
 	"github.com/klauspost/reedsolomon"
 )
 
-func fillRandom(b []byte) {
-	for i := range b {
-		b[i] = byte(rand.Int() & 0xff)
+func fillRandom(p []byte) {
+	for i := 0; i < len(p); i += 7 {
+		val := rand.Int63()
+		for j := 0; i+j < len(p) && j < 7; j++ {
+			p[i+j] = byte(val)
+			val >>= 8
+		}
 	}
 }
 
diff --git a/reedsolomon_test.go b/reedsolomon_test.go
index 0e3b9750..2d92a570 100644
--- a/reedsolomon_test.go
+++ b/reedsolomon_test.go
@@ -236,9 +236,13 @@ func TestOneEncode(t *testing.T) {
 
 }
 
-func fillRandom(b []byte) {
-	for i := range b {
-		b[i] = byte(rand.Int() & 0xff)
+func fillRandom(p []byte) {
+	for i := 0; i < len(p); i += 7 {
+		val := rand.Int63()
+		for j := 0; i+j < len(p) && j < 7; j++ {
+			p[i+j] = byte(val)
+			val >>= 8
+		}
 	}
 }
 
diff --git a/streaming_test.go b/streaming_test.go
index 7bdc9938..208571b0 100644
--- a/streaming_test.go
+++ b/streaming_test.go
@@ -119,9 +119,7 @@ func TestStreamEncodingConcurrent(t *testing.T) {
 
 func randomBuffer(length int) *bytes.Buffer {
 	b := make([]byte, length)
-	for i := range b {
-		b[i] = byte(rand.Int() & 0xff)
-	}
+	fillRandom(b)
 	return bytes.NewBuffer(b)
 }
 
@@ -129,9 +127,7 @@ func randomBytes(n, length int) [][]byte {
 	bufs := make([][]byte, n)
 	for j := range bufs {
 		bufs[j] = make([]byte, length)
-		for i := range bufs[j] {
-			bufs[j][i] = byte(rand.Int() & 0xff)
-		}
+		fillRandom(bufs[j])
 	}
 	return bufs
 }