Undent - remove leading spaces

    
/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.io.*;

/** Undent - remove leading spaces
 * @author Ian F. Darwin, http://www.darwinsys.com/
 * @version $Id: Undent.java,v 1.5 2004/02/08 23:57:09 ian Exp $
 */

public class Undent {
  //+
  /** the default number of spaces to remove. */
  int nSpaces = 2;
  //-

    public static void main(String[] av) {
        Undent c = new Undent();
        if (av.length == 0)
            c.process(new BufferedReader(
        new InputStreamReader(System.in)));
    else for (int i=0; i<av.length; i++) {
      try {
        c.process(new BufferedReader(new FileReader(av[i])));
      } catch (FileNotFoundException e) {
        System.err.println(e);
      }
        }
    }


    /** undent one file, given an open BufferedReader.
   * Undent by removing UP TO "nSpaces" leading spaces.
   */
    public void process(BufferedReader is) {
    //+
    // GRRR THIS DOES NOT QUITE WORK - FIX -- Ian
        try {
            String inputLine;

            while ((inputLine = is.readLine()) != null) {
        int i;
        for (i=0; i<nSpaces; i++) {
          if (!Character.isWhitespace(inputLine.charAt(i)))
            break;
        }
                System.out.println(inputLine.substring(i));
            }
            is.close();
    //-
        } catch (IOException e) {
            System.out.println("IOException: " + e);
        }
    }
  //-
}

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Undent - remove leading spaces : File Commands « File Input Output « Java

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