/*----------------------------------------------------------------

  * $Id: InputReader.java,v 1.1.1.1 2004/01/26 20:46:18 pkb Exp $

  * 

  * (c)2000 - Paul Blankenbaker

  *

  * Revision Log

  * 

  *  2000-11-16 10:53:02        Paul Blankenbaker 

  * 

  *         Created initial version

  */

 //----------------------------------------------------------------

 package com.ccg.macros;

 import java.io.*;                // needed for I/O operations

 //----------------------------------------------------------------

 /** Describe...

  * 

  * <code><pre>

  * class Example {

  *   public void main(String[] args) {

  *     com.ccg.macros.InputReader o = new com.ccg.macros.InputReader();

  *           System.out.println(o);

  *   }

  * }

  * </pre></code>

  * 

  * @version $Revision: 1.1.1.1 $

  * 

  * @since 1.0

  * 

  * @author $Author: pkb $

  * 

  * @see Input */

 //----------------------------------------------------------------

 public class InputReader extends Input {

   //----------------------------------------------------------------

   /** Initializes object to... It performs the following tasks:

    * 

    * <ul><li>Initializes </li>

    * 

    * <li></li>

    * 

    * </ul>

    * 

    * @since        1.0 */

   //----------------------------------------------------------------

   public InputReader() {

     super();

     _in = null;

   }

   public InputReader(Reader r) {

     super(new char[2048],2048,2048);

     _in = r;

   }

   public InputReader(File f) throws IOException {

     this(new FileReader(f));

   }

   public InputReader(InputStream in) {

     this(new InputStreamReader(in));

   }

   public void close() throws IOException {

     if (_in != null) _in.close();

   }

   int shiftAndFill(int cur_ofs) throws IOException {

                                 // shift above

     int len = super.shiftAndFill(cur_ofs);

                                 // see if we have room to add more

     char[] buf = getBuffer();

                                 // see if room to read in more

     int fetch = buf.length - len;

     if ((fetch > 0) && (_in != null)) {

       fetch = _in.read(buf,len,fetch);

       if (fetch == -1) _in = null;

       else {

         len += fetch;

         setLength(len);

       }

     }

     return len;

   }

   private Reader _in;

 }