/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 *
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */
package netscape.ldap.util;

/** This abstract class is the parent of those classes which implement
    MIME encoding and decoding: base64.
    @see netcape.ldap.util.MimeBase64Encoder
    @see netcape.ldap.util.MimeBase64Decoder
 */

public abstract class MimeEncoder {

    /** Given a sequence of input bytes, produces a sequence of output bytes.
        Note that some (small) amount of buffering may be necessary, if the
        input byte stream didn't fall on an appropriate boundary.  If there
        are bytes in `out' already, the new bytes are appended, so the
        caller should do `out.setLength(0)' first if that's desired.
     */
    abstract public void translate(ByteBuf in, ByteBuf out);

    /** Tell the decoder that no more input data will be forthcoming.
        This may result in output, as a result of flushing the internal
        buffer.  This object must not be used again after calling eof().
        If there are bytes in `out' already, the new bytes are appended,
        so the caller should do `out.setLength(0)' first if that's desired.
     */
    abstract public void eof(ByteBuf out);
}