Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

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  * 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

  * published by the Free Software Foundation.  Oracle designates this

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

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * 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.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  */

 /*

  * @(#)UUEncoderStream.java   1.3 02/03/27

  */

 package com.sun.xml.internal.messaging.saaj.packaging.mime.util;

 import java.io.*;

 /**

  * This class implements a UUEncoder. It is implemented as

  * a FilterOutputStream, so one can just wrap this class around

  * any output stream and write bytes into this filter. The Encoding

  * is done as the bytes are written out.

  *

  * @author John Mani

  */

 public class UUEncoderStream extends FilterOutputStream {

     private byte[] buffer;      // cache of bytes that are yet to be encoded

     private int bufsize = 0;    // size of the cache

     private boolean wrotePrefix = false;

     protected String name;      // name of file

     protected int mode;         // permissions mode

     /**

      * Create a UUencoder that encodes the specified input stream

      * @param out        the output stream

      */

     public UUEncoderStream(OutputStream out) {

         this(out, "encoder.buf", 644);

     }

     /**

      * Create a UUencoder that encodes the specified input stream

      * @param out        the output stream

      * @param name       Specifies a name for the encoded buffer

      */

     public UUEncoderStream(OutputStream out, String name) {

         this(out, name, 644);

     }

     /**

      * Create a UUencoder that encodes the specified input stream

      * @param out        the output stream

      * @param name       Specifies a name for the encoded buffer

      * @param mode       Specifies permission mode for the encoded buffer

      */

     public UUEncoderStream(OutputStream out, String name, int mode) {

         super(out);

         this.name = name;

         this.mode = mode;

         buffer = new byte[45];

     }

     /**

      * Set up the buffer name and permission mode.

      * This method has any effect only if it is invoked before

      * you start writing into the output stream

      */

     public void setNameMode(String name, int mode) {

         this.name = name;

         this.mode = mode;

     }

     public void write(byte[] b, int off, int len) throws IOException {

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

             write(b[off + i]);

     }

     public void write(byte[] data) throws IOException {

         write(data, 0, data.length);

     }

     public void write(int c) throws IOException {

         /* buffer up characters till we get a line's worth, then encode

          * and write them out. Max number of characters allowed per

          * line is 45.

          */

         buffer[bufsize++] = (byte)c;

         if (bufsize == 45) {

             writePrefix();

             encode();

             bufsize = 0;

         }

     }

     public void flush() throws IOException {

         if (bufsize > 0) { // If there's unencoded characters in the buffer

             writePrefix();

             encode();      // .. encode them

         }

         writeSuffix();

         out.flush();

     }

     public void close() throws IOException {

         flush();

         out.close();

     }

     /**

      * Write out the prefix: "begin <mode> <name>"

      */

     private void writePrefix() throws IOException {

         if (!wrotePrefix) {

             PrintStream ps = new PrintStream(out);

             ps.println("begin " + mode + " " + name);

             ps.flush();

             wrotePrefix = true;

         }

     }

     /**

      * Write a single line containing space and the suffix line

      * containing the single word "end" (terminated by a newline)

      */

     private void writeSuffix() throws IOException {

         PrintStream ps = new PrintStream(out);

         ps.println(" \nend");

         ps.flush();

     }

     /**

      * Encode a line.

      * Start off with the character count, followed by the encoded atoms

      * and terminate with LF. (or is it CRLF or the local line-terminator ?)

      * Take three bytes and encodes them into 4 characters

      * If bufsize if not a multiple of 3, the remaining bytes are filled

      * with '1'. This insures that the last line won't end in spaces

      * and potentiallly be truncated.

      */

     private void encode() throws IOException {

         byte a, b, c;

         int c1, c2, c3, c4;

         int i = 0;

         // Start off with the count of characters in the line

         out.write((bufsize & 0x3f) + ' ');

         while (i < bufsize) {

             a = buffer[i++];

             if (i < bufsize) {

                 b = buffer[i++];

                 if (i < bufsize)

                     c = buffer[i++];

                 else // default c to 1

                     c = 1;

             }

             else { // default b & c to 1

                 b = 1;

                 c = 1;

             }

             c1 = (a >>> 2) & 0x3f;

             c2 = ((a << 4) & 0x30) | ((b >>> 4) & 0xf);

             c3 = ((b << 2) & 0x3c) | ((c >>> 6) & 0x3);

             c4 = c & 0x3f;

             out.write(c1 + ' ');

             out.write(c2 + ' ');

             out.write(c3 + ' ');

             out.write(c4 + ' ');

         }

         // Terminate with LF. (should it be CRLF or local line-terminator ?)

         out.write('\n');

     }

     /**** begin TEST program *****

     public static void main(String argv[]) throws Exception {

         FileInputStream infile = new FileInputStream(argv[0]);

         UUEncoderStream encoder = new UUEncoderStream(System.out);

         int c;

         while ((c = infile.read()) != -1)

             encoder.write(c);

         encoder.close();

     }

     **** end TEST program *****/

 }