content: /*******************************************************************************
   * Copyright (c) 2000, 2007 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.wst.jsdt.internal.ui.refactoring.nls.search;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.Reader;
  
  
  class LineReader extends Object {
  	protected static final int LF= '\n';
  	protected static final int CR= '\r';
  
  	private BufferedReader fReader;
  
  	protected int fPushbackChar;
  	protected boolean fPushback;
  
  	public LineReader(InputStream in, String encoding) throws IOException {
  		this(new InputStreamReader(in, encoding));
  	}
  
  	public LineReader(Reader reader) {
  		fPushback= false;
  		fReader= new BufferedReader(reader);
  	}
  
  	public int readLine(StringBuffer sb) throws IOException {
  		int ch= -1;
  		sb.setLength(0);
  		if (fPushback) {
  			ch= fPushbackChar;
  			fPushback= false;
  		} else
  			ch= fReader.read();
  		while (ch >= 0) {
  			if (ch == LF)
  				return 1;
  			if (ch == CR) {
  				ch= fReader.read();
  				if (ch == LF)
  					return 2;
  				else {
  					fPushbackChar= ch;
  					fPushback= true;
  					return 1;
  				}
  			}
  			sb.append((char) ch);
  			ch= fReader.read();
  		}
  		return -1;
  	}
  
  	public void close() throws IOException {
  		fReader.close();
  	}
  }
  