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;
}
}