com.hazelcast.shaded.org.locationtech.jts.io.ByteOrderValues Maven / Gradle / Ivy
/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package com.hazelcast.shaded.org.locationtech.jts.io;
/**
* Methods to read and write primitive Java datatypes from/to byte
* sequences, allowing the byte order to be specified
*
* Similar to the standard Java ByteBuffer class.
*/
public class ByteOrderValues
{
public static final int BIG_ENDIAN = 1;
public static final int LITTLE_ENDIAN = 2;
public static int getInt(byte[] buf, int byteOrder)
{
if (byteOrder == BIG_ENDIAN) {
return ( (buf[0] & 0xff) << 24)
| ( (buf[1] & 0xff) << 16)
| ( (buf[2] & 0xff) << 8)
| ( (buf[3] & 0xff) );
}
else {// LITTLE_ENDIAN
return ( (buf[3] & 0xff) << 24)
| ( (buf[2] & 0xff) << 16)
| ( (buf[1] & 0xff) << 8)
| ( (buf[0] & 0xff) );
}
}
public static void putInt(int intValue, byte[] buf, int byteOrder)
{
if (byteOrder == BIG_ENDIAN) {
buf[0] = (byte)(intValue >> 24);
buf[1] = (byte)(intValue >> 16);
buf[2] = (byte)(intValue >> 8);
buf[3] = (byte) intValue;
}
else {// LITTLE_ENDIAN
buf[0] = (byte) intValue;
buf[1] = (byte)(intValue >> 8);
buf[2] = (byte)(intValue >> 16);
buf[3] = (byte)(intValue >> 24);
}
}
public static long getLong(byte[] buf, int byteOrder)
{
if (byteOrder == BIG_ENDIAN) {
return
(long) (buf[0] & 0xff) << 56
| (long) (buf[1] & 0xff) << 48
| (long) (buf[2] & 0xff) << 40
| (long) (buf[3] & 0xff) << 32
| (long) (buf[4] & 0xff) << 24
| (long) (buf[5] & 0xff) << 16
| (long) (buf[6] & 0xff) << 8
| (long) (buf[7] & 0xff);
}
else {// LITTLE_ENDIAN
return
(long) (buf[7] & 0xff) << 56
| (long) (buf[6] & 0xff) << 48
| (long) (buf[5] & 0xff) << 40
| (long) (buf[4] & 0xff) << 32
| (long) (buf[3] & 0xff) << 24
| (long) (buf[2] & 0xff) << 16
| (long) (buf[1] & 0xff) << 8
| (long) (buf[0] & 0xff);
}
}
public static void putLong(long longValue, byte[] buf, int byteOrder)
{
if (byteOrder == BIG_ENDIAN) {
buf[0] = (byte)(longValue >> 56);
buf[1] = (byte)(longValue >> 48);
buf[2] = (byte)(longValue >> 40);
buf[3] = (byte)(longValue >> 32);
buf[4] = (byte)(longValue >> 24);
buf[5] = (byte)(longValue >> 16);
buf[6] = (byte)(longValue >> 8);
buf[7] = (byte) longValue;
}
else { // LITTLE_ENDIAN
buf[0] = (byte) longValue;
buf[1] = (byte)(longValue >> 8);
buf[2] = (byte)(longValue >> 16);
buf[3] = (byte)(longValue >> 24);
buf[4] = (byte)(longValue >> 32);
buf[5] = (byte)(longValue >> 40);
buf[6] = (byte)(longValue >> 48);
buf[7] = (byte)(longValue >> 56);
}
}
public static double getDouble(byte[] buf, int byteOrder)
{
long longVal = getLong(buf, byteOrder);
return Double.longBitsToDouble(longVal);
}
public static void putDouble(double doubleValue, byte[] buf, int byteOrder)
{
long longVal = Double.doubleToLongBits(doubleValue);
putLong(longVal, buf, byteOrder);
}
}