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Common Lisp implementation running on the JVM

There is a newer version: 1.0.1

/*
 * CapitalizeFirstStream.java
 *
 * Copyright (C) 2004-2005 Peter Graves
 * $Id: CapitalizeFirstStream.java 12254 2009-11-06 20:07:54Z ehuelsmann $
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * As a special exception, the copyright holders of this library give you
 * permission to link this library with independent modules to produce an
 * executable, regardless of the license terms of these independent
 * modules, and to copy and distribute the resulting executable under
 * terms of your choice, provided that you also meet, for each linked
 * independent module, the terms and conditions of the license of that
 * module.  An independent module is a module which is not derived from
 * or based on this library.  If you modify this library, you may extend
 * this exception to your version of the library, but you are not
 * obligated to do so.  If you do not wish to do so, delete this
 * exception statement from your version.
 */

package org.armedbear.lisp;

public final class CapitalizeFirstStream extends CaseFrobStream
{
    boolean virgin = true;

    public CapitalizeFirstStream(Stream target)
    {
        super(target);
    }

    @Override
    public void _writeChar(char c)
    {
        if (virgin) {
            if (Character.isLetterOrDigit(c)) {
                c = LispCharacter.toUpperCase(c);
                virgin = false;
            }
        } else
            c = LispCharacter.toLowerCase(c);
        target._writeChar(c);
    }

    @Override
    public void _writeString(String s)
    {
        final int length = s.length();
        for (int i = 0; i < length; i++)
            _writeChar(s.charAt(i));
    }

    @Override
    public void _writeLine(String s)
    {
        _writeString(s);
        _writeChar('\n');
    }
}