/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: SchematicPosition.java
*
* Copyright (c) 2003, 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 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 General Public License for more details.
*
* You should have received a copy of the GNU 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.tool.generator.flag;
import java.util.ArrayList;
import java.util.List;
/** The position of a NodeInst deep in the hierarchy. For example "123/456/789"
* means 789 is coordinate of NodeInst, 456 is coordinate of NodeInst's
* parent, and 123 is coordinate of NodeInst's grand parent. */
public class SchematicPosition implements Comparable<SchematicPosition> {
private List<Double> coords = new ArrayList<Double>();
public int depth() {return coords.size();}
public int compareTo(SchematicPosition p2) {
int shared = Math.min(depth(), p2.depth());
for (int i=0; i<shared; i++) {
double x1 = coords.get(i);
double x2 = p2.coords.get(i);
if (x1==x2) continue;
return (int) Math.signum(x1-x2);
}
// position matches up to shared depth
return depth()-p2.depth();
}
public void push(double d) {
coords.add(d);
}
public void pop() {
coords.remove(coords.size()-1);
}
public SchematicPosition copy() {
SchematicPosition c = new SchematicPosition();
for (int i=0; i<depth(); i++) {
c.push(coords.get(i));
}
return c;
}
}