1// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved.  Use of
 2// this source code is governed by a BSD-style license that can be found in the
 3// LICENSE file.
 4
 5//go:build appengine
 6// +build appengine
 7
 8package websocket
 9
10func maskBytes(key [4]byte, pos int, b []byte) int {
11	for i := range b {
12		b[i] ^= key[pos&3]
13		pos++
14	}
15	return pos & 3
16}