001/*
002 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 *  This file is licensed to You under the Eclipse Public License (EPL);
005 *  You may not use this file except in compliance with the License. You
006 *  may obtain a copy of the License at
007 *
008 *      http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 *  See the COPYRIGHT.txt file distributed with this work for information
011 *  regarding copyright ownership.
012 */
013package org.jikesrvm.tools.header_gen;
014
015import java.util.Comparator;
016
017import org.jikesrvm.classloader.RVMField;
018import org.vmmagic.unboxed.Offset;
019
020/**
021 * Utility class to help sort fields.
022 */
023class AscendingOffsetComparator implements Comparator<RVMField> {
024
025  @Override
026  public int compare(RVMField firstField, RVMField secondField) {
027    Offset firstOff = firstField.getOffset();
028    Offset secondOff = secondField.getOffset();
029    if (firstOff.sGT(secondOff)) return 1;
030    if (firstOff.sLT(secondOff)) return -1;
031    return 0;
032  }
033}