dns/dnsmessage: refactoring

Author: 12ya

dns/dnsmessage/message.go

@@ -197,7 +197,7 @@ const hexDigits = "0123456789abcdef"
 
 func printString(str []byte) string {
 	buf := make([]byte, 0, len(str))
-	for i := 0; i < len(str); i++ {
+	for i := range len(str) {
 		c := str[i]
 		if c == '.' || c == '-' || c == ' ' ||
 			'A' <= c && c <= 'Z' ||

dns/dnsmessage/message_test.go

@@ -1279,7 +1279,7 @@ func BenchmarkParsing(b *testing.B) {
 	}
 
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		benchmarkParsing(b, buf)
 	}
 }
@@ -1422,7 +1422,7 @@ func BenchmarkPack(b *testing.B) {
 
 	b.ReportAllocs()
 
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		if _, err := msg.Pack(); err != nil {
 			b.Fatal("Message.Pack() =", err)
 		}
@@ -1435,7 +1435,7 @@ func BenchmarkAppendPack(b *testing.B) {
 
 	b.ReportAllocs()
 
-	for i := 0; i < b.N; i++ {
+	for range b.N {
 		if _, err := msg.AppendPack(buf[:0]); err != nil {
 			b.Fatal("Message.AppendPack() = ", err)
 		}