0N/A/*
6311N/A * Copyright (c) 1994, 1995, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.misc;
0N/A
0N/A/**
0N/A * The CRC-16 class calculates a 16 bit cyclic redundancy check of a set
0N/A * of bytes. This error detecting code is used to determine if bit rot
6311N/A * has occured in a byte stream.
0N/A */
0N/A
0N/Apublic class CRC16 {
0N/A
0N/A /** value contains the currently computed CRC, set it to 0 initally */
0N/A public int value;
0N/A
0N/A public CRC16() {
0N/A value = 0;
6311N/A }
0N/A
6311N/A /** update CRC with byte b */
0N/A public void update(byte aByte) {
6311N/A int a, b;
0N/A
0N/A a = (int) aByte;
0N/A for (int count = 7; count >=0; count--) {
0N/A a = a << 1;
0N/A b = (a >>> 8) & 1;
0N/A if ((value & 0x8000) != 0) {
0N/A value = ((value << 1) + b) ^ 0x1021;
0N/A } else {
0N/A value = (value << 1) + b;
0N/A }
0N/A }
0N/A value = value & 0xffff;
0N/A return;
0N/A }
0N/A
0N/A /** reset CRC value to 0 */
0N/A public void reset() {
0N/A value = 0;
0N/A }
0N/A}
0N/A