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/*******************************************************************************
* Copyright (c) 2000, 2013 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.externaltools.internal.launchConfigurations;
import java.util.Comparator;
public class IgnoreWhiteSpaceComparator implements Comparator<String> {
@Override
public int compare(String o1, String o2) {
if (o1 == null || o2 == null) {
if (o1 == o2) {
return 0;
}
return -1;
}
int i1 = 0;
int i2 = 0;
int l1 = o1.length();
int l2 = o2.length();
char ch1 = ' ';
char ch2 = ' ';
while (i1 < l1 && i2 < l2) {
while (i1 < l1 && Character.isWhitespace(ch1 = o1.charAt(i1))) {
i1++;
}
while (i2 < l2 && Character.isWhitespace(ch2 = o2.charAt(i2))) {
i2++;
}
if (i1 == l1 && i2 == l2) {
return 0;
}
if (ch1 != ch2) {
return -1;
}
i1++;
i2++;
}
return 0;
}
}
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