/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package com.sun.corba.se.impl.orbutil;

import java.io.StringWriter;

import java.io.OutputStream;

import java.io.IOException;

/**

 * Writes each input byte as a 2 byte hexidecimal output pair making it

 * possible to turn arbitrary binary data into an ASCII format.

 * The high 4 bits of the byte is translated into the first byte.

 *

 * @author      Jeff Nisewanger

 */

public class HexOutputStream extends OutputStream

{

    static private final char hex[] = {

        '0', '1', '2', '3', '4', '5', '6', '7',

        '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'

    };

    private StringWriter writer;

    /**

     * Creates a new HexOutputStream.

     * @param w The underlying StringWriter.

     */

    public

        HexOutputStream(StringWriter w) {

        writer = w;

    }

    /**

     * Writes a byte. Will block until the byte is actually

     * written.

     * param b The byte to write out.

     * @exception java.io.IOException I/O error occurred.

     */

    public synchronized void write(int b) throws IOException {

        writer.write(hex[((b >> 4) & 0xF)]);

        writer.write(hex[((b >> 0) & 0xF)]);

    }

    public synchronized void write(byte[] b) throws IOException {

        write(b, 0, b.length);

    }

    public synchronized void write(byte[] b, int off, int len)

        throws IOException

    {

        for(int i=0; i < len; i++) {

            write(b[off + i]);

        }

    }

}