/*
* Distributed as part of mchange-commons-java 0.2.11
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman <swaldman@mchange.com>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.lang;
public class
ShortUtils
{
public final static int
UNSIGNED_MAX_VALUE = (
Short.
MAX_VALUE * 2) + 1;
public static short
shortFromByteArray(byte[]
bytes, int
offset)
{
int
out = 0;
out |= ((int)
ByteUtils.
toUnsigned(
bytes[
offset + 0])) << 8;
out |= ((int)
ByteUtils.
toUnsigned(
bytes[
offset + 1])) << 0;
return (short)
out;
}
public static byte[]
byteArrayFromShort(short
s)
{
byte[]
out = new byte[2];
shortIntoByteArray(
s, 0,
out);
return
out;
}
public static void
shortIntoByteArray(short
s, int
offset, byte[]
bytes)
{
bytes[
offset + 0] = (byte) ((
s >>> 8) & 0xFF);
bytes[
offset + 1] = (byte) ((
s >>> 0) & 0xFF);
}
public static int
toUnsigned(short
s)
{return (
s < 0 ? (
UNSIGNED_MAX_VALUE + 1) +
s :
s);}
private
ShortUtils()
{}
}