/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: UnboxedDouble.java
*
* Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) 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. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.database.geometry.btree.unboxed;
import java.io.*;
/** A 64-bit <tt>double</tt> */
public class UnboxedDouble implements UnboxedComparable<Double> {
public static final UnboxedDouble instance = new UnboxedDouble();
public int getSize() { return 8; }
public Double deserialize(byte[] buf, int ofs) { return new Double(deserializeDouble(buf, ofs)); }
public void serialize(Double k, byte[] buf, int ofs) { serializeDouble(k.doubleValue(), buf, ofs); }
public Double deserializeDouble(byte[] buf, int ofs) {
return
Double.longBitsToDouble(((buf[ofs+0] & 0xffL) << 0) |
((buf[ofs+1] & 0xffL) << 8) |
((buf[ofs+2] & 0xffL) << 16) |
((buf[ofs+3] & 0xffL) << 24) |
((buf[ofs+4] & 0xffL) << 32) |
((buf[ofs+5] & 0xffL) << 40) |
((buf[ofs+6] & 0xffL) << 48) |
((buf[ofs+7] & 0xffL) << 56));
}
public void serializeDouble(double f, byte[] buf, int ofs) {
long i = Double.doubleToRawLongBits(f);
buf[ofs+0] = (byte)((i >> 0) & 0xffL);
buf[ofs+1] = (byte)((i >> 8) & 0xffL);
buf[ofs+2] = (byte)((i >> 16) & 0xffL);
buf[ofs+3] = (byte)((i >> 24) & 0xffL);
buf[ofs+4] = (byte)((i >> 32) & 0xffL);
buf[ofs+5] = (byte)((i >> 40) & 0xffL);
buf[ofs+6] = (byte)((i >> 48) & 0xffL);
buf[ofs+7] = (byte)((i >> 56) & 0xffL);
}
public int compare(byte[] buf1, int ofs1, byte[] buf2, int ofs2) {
double f1 = deserializeDouble(buf1, ofs1);
double f2 = deserializeDouble(buf2, ofs2);
return Double.compare(f1, f2);
}
}