/*******************************************************************************
* This file is part of logisim-evolution.
*
* logisim-evolution 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.
*
* logisim-evolution 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 logisim-evolution. If not, see <http://www.gnu.org/licenses/>.
*
* Original code by Carl Burch (http://www.cburch.com), 2011.
* Subsequent modifications by :
* + Haute École Spécialisée Bernoise
* http://www.bfh.ch
* + Haute École du paysage, d'ingénierie et d'architecture de Genève
* http://hepia.hesge.ch/
* + Haute École d'Ingénierie et de Gestion du Canton de Vaud
* http://www.heig-vd.ch/
* The project is currently maintained by :
* + REDS Institute - HEIG-VD
* Yverdon-les-Bains, Switzerland
* http://reds.heig-vd.ch
*******************************************************************************/
/**
* Code taken from Cornell's version of Logisim:
* http://www.cs.cornell.edu/courses/cs3410/2015sp/
*/
package com.cburch.logisim.util;
public final class Nulls {
public static boolean equal(Object a, Object b) {
if (a == null) {
return b == null;
} else if (b == null) {
return false;
} else {
return a.equals(b);
}
}
public static boolean unequal(Object a, Object b) {
if (a == null) {
return b != null;
} else if (b == null) {
return true;
} else {
return !a.equals(b);
}
}
private Nulls() {
}
}