/*******************************************************************************
* Copyright (c) 2007, 2011 Intel 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:
* Intel Corporation - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.managedbuilder.testplugin;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class DiffUtil {
private static final String DIFF_CMD = "diff -ub";
private static DiffUtil fInstance;
private DiffUtil(){
}
public static DiffUtil getInstance(){
if(fInstance == null)
fInstance = new DiffUtil();
return fInstance;
}
private static String createCommand(String location1, String location2){
StringBuffer buf = new StringBuffer();
buf.append(DIFF_CMD).append(" '").append(location1).append("' '").append(location2).append("'");
return buf.toString();
}
public String diff(String location1, String location2){
InputStream in = invokeDiff(location1, location2);
if(in == null)
return null;
BufferedReader br;
br = new BufferedReader(new InputStreamReader(in));
String line;
StringBuffer buf = new StringBuffer();
try {
while ((line = br.readLine()) != null) {
buf.append("\n");
buf.append(line);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
return buf.toString();
}
private InputStream invokeDiff(String location1, String location2){
try {
Process p = Runtime.getRuntime().exec(createCommand(location1, location2));
return p.getInputStream();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}