com.sun.mail.util.BEncoderStream Maven / Gradle / Ivy

/*
 * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.mail.util;

import java.io.*;

/**
 * This class implements a 'B' Encoder as defined by RFC2047 for
 * encoding MIME headers. It subclasses the BASE64EncoderStream
 * class.
 * 
 * @author John Mani
 */

public class BEncoderStream extends BASE64EncoderStream {

    /**
     * Create a 'B' encoder that encodes the specified input stream.
     * @param out        the output stream
     */
    public BEncoderStream(OutputStream out) {
	super(out, Integer.MAX_VALUE); // MAX_VALUE is 2^31, should
				       // suffice (!) to indicate that
				       // CRLFs should not be inserted
    }

    /**
     * Returns the length of the encoded version of this byte array.
     *
     * @param	b	the byte array
     * @return		the length
     */
    public static int encodedLength(byte[] b) {
        return ((b.length + 2)/3) * 4;
    }
}