/* Soot - a J*va Optimization Framework
 * Copyright (C) 2002 Sable Research Group
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the Sable Research Group and others 1997-1999.  
 * See the 'credits' file distributed with Soot for the complete list of
 * contributors.  (Soot is distributed at http://www.sable.mcgill.ca/soot)
 */


/* @author Feng Qian */

package soot.util.dot;
import java.io.*;

public class DotGraphUtility {

  /* replace any " to \" in the string */
  public static String replaceQuotes(String original){
    byte[] ord = original.getBytes();
    int quotes = 0;
    for (byte element : ord) {
      if (element == '\"') quotes++;
    }

    if (quotes == 0) return original;

    byte[] newsrc = new byte[ord.length+quotes];
    for (int i=0, j=0, n=ord.length; i<n; i++, j++){
      if (ord[i] == '\"') {
	newsrc[j++] = (byte) '\\';
      }
      newsrc[j] = ord[i];
    }

    /*
    G.v().out.println("before "+original);
    G.v().out.println("after  "+(new String(newsrc)));
    */

    return new String(newsrc);
  }

  /* replace any return by to "\n" */
  public static String replaceReturns(String original){
    byte[] ord = original.getBytes();
    int quotes = 0;
    for (byte element : ord) {
      if (element == '\n') quotes++;
    }

    if (quotes == 0) return original;

    byte[] newsrc = new byte[ord.length+quotes];
    for (int i=0, j=0, n=ord.length; i<n; i++, j++){
      if (ord[i] == '\n') {
	newsrc[j++] = (byte) '\\';
	newsrc[j] = (byte) 'n';
      } else {
	newsrc[j] = ord[i];
      }
    }

    /*
    G.v().out.println("before "+original);
    G.v().out.println("after  "+(new String(newsrc)));
    */

    return new String(newsrc);    
  }

  public static void renderLine(OutputStream out,
		      String content, 
		      int indent) throws IOException {
    for (int i=0; i<indent; i++) {
      out.write(' ');
    }
    
    content = content + "\n";

    out.write(content.getBytes());
  }
}