// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved.  Use of

// this source code is governed by a BSD-style license that can be found in the

// LICENSE file.

// +build appengine

package websocket

func maskBytes(key [4]byte, pos int, b []byte) int {

	for i := range b {

		b[i] ^= key[pos&3]

		pos++

	}

	return pos & 3

}