PSSubCommand.java

/*
 * This file is part of LaTeXDraw.
 * Copyright (c) 2005-2017 Arnaud BLOUIN
 * LaTeXDraw 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 2 of the License, or (at your option) any later version.
 * LaTeXDraw is distributed 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.
 */
package net.sf.latexdraw.parsers.ps;

import java.util.Deque;

/**
 * The Postscript sub command.
 * @author Arnaud Blouin
 */
public class PSSubCommand implements PSArithemticCommand {
	@Override
	public void execute(final Deque<Double> stack, final double x) throws InvalidFormatPSFunctionException {
		if(stack.size() < 2) throw new InvalidFormatPSFunctionException();

		final double a = stack.pop();
		final double b = stack.pop();

		stack.push(b - a);
	}
}