1 /*
   2  * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  * @(#)BEncoderStream.java    1.3 02/03/27
  28  */
  29 
  30 
  31 
  32 package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
  33 
  34 import java.io.OutputStream;
  35 
  36 /**
  37  * This class implements a 'B' Encoder as defined by RFC2047 for
  38  * encoding MIME headers. It subclasses the BASE64EncoderStream
  39  * class.
  40  *
  41  * @author John Mani
  42  */
  43 
  44 public class BEncoderStream extends BASE64EncoderStream {
  45 
  46     /**
  47      * Create a 'B' encoder that encodes the specified input stream.
  48      * @param out        the output stream
  49      */
  50     public BEncoderStream(OutputStream out) {
  51         super(out, Integer.MAX_VALUE); // MAX_VALUE is 2^31, should
  52                                        // suffice (!) to indicate that
  53                                        // CRLFs should not be inserted
  54     }
  55 
  56     /**
  57      * Returns the length of the encoded version of this byte array.
  58      *
  59      * @param b byte array.
  60      *
  61      * @return length of the byte array.
  62      */
  63     public static int encodedLength(byte[] b) {
  64         return ((b.length + 2)/3) * 4;
  65     }
  66 }