jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/QPDecoderStream.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/QPDecoderStream.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/QPDecoderStream.java

Thu, 31 Aug 2017 15:18:52 +0800

author: aoqi
date: Thu, 31 Aug 2017 15:18:52 +0800
changeset 637: 9c07ef4934dd
parent 368: 0989ad8c0860
parent 0: 373ffda63c9a
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
  * 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.
  */
 /*
  * @(#)QPDecoderStream.java   1.9 02/04/02
  */
 package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
 import java.io.*;
 /**
  * This class implements a QP Decoder. It is implemented as
  * a FilterInputStream, so one can just wrap this class around
  * any input stream and read bytes from this filter. The decoding
  * is done as the bytes are read out.
  *
  * @author John Mani
  */
 public class QPDecoderStream extends FilterInputStream {
     protected byte[] ba = new byte[2];
     protected int spaces = 0;
     /**
      * Create a Quoted Printable decoder that decodes the specified
      * input stream.
      * @param in        the input stream
      */
     public QPDecoderStream(InputStream in) {
         super(new PushbackInputStream(in, 2)); // pushback of size=2
     }
     /**
      * Read the next decoded byte from this input stream. The byte
      * is returned as an <code>int</code> in the range <code>0</code>
      * to <code>255</code>. If no byte is available because the end of
      * the stream has been reached, the value <code>-1</code> is returned.
      * This method blocks until input data is available, the end of the
      * stream is detected, or an exception is thrown.
      *
      * @return     the next byte of data, or <code>-1</code> if the end of the
      *             stream is reached.
      * @exception  IOException  if an I/O error occurs.
      */
     public int read() throws IOException {
         if (spaces > 0) {
             // We have cached space characters, return one
             spaces--;
             return ' ';
         }
         int c = in.read();
         if (c == ' ') {
             // Got space, keep reading till we get a non-space char
             while ((c = in.read()) == ' ')
                 spaces++;
             if (c == '\r' || c == '\n' || c == -1)
                 // If the non-space char is CR/LF/EOF, the spaces we got
                 // so far is junk introduced during transport. Junk 'em.
                 spaces = 0;
             else {
                 // The non-space char is NOT CR/LF, the spaces are valid.
                 ((PushbackInputStream)in).unread(c);
                 c = ' ';
             }
             return c; // return either <SPACE> or <CR/LF>
         }
         else if (c == '=') {
             // QP Encoded atom. Decode the next two bytes
             int a = in.read();
             if (a == '\n') {
                 /* Hmm ... not really confirming QP encoding, but lets
                  * allow this as a LF terminated encoded line .. and
                  * consider this a soft linebreak and recurse to fetch
                  * the next char.
                  */
                 return read();
             } else if (a == '\r') {
                 // Expecting LF. This forms a soft linebreak to be ignored.
                 int b = in.read();
                 if (b != '\n')
                     /* Not really confirming QP encoding, but
                      * lets allow this as well.
                      */
                     ((PushbackInputStream)in).unread(b);
                 return read();
             } else if (a == -1) {
                 // Not valid QP encoding, but we be nice and tolerant here !
                 return -1;
             } else {
                 ba[0] = (byte)a;
                 ba[1] = (byte)in.read();
                 try {
                     return ASCIIUtility.parseInt(ba, 0, 2, 16);
                 } catch (NumberFormatException nex) {
                     /*
                     System.err.println(
                         "Illegal characters in QP encoded stream: " +
                         ASCIIUtility.toString(ba, 0, 2)
                     );
                     */
                     ((PushbackInputStream)in).unread(ba);
                     return c;
                 }
             }
         }
         return c;
     }
     /**
      * Reads up to <code>len</code> decoded bytes of data from this input stream
      * into an array of bytes. This method blocks until some input is
      * available.
      * <p>
      *
      * @param      buf   the buffer into which the data is read.
      * @param      off   the start offset of the data.
      * @param      len   the maximum number of bytes read.
      * @return     the total number of bytes read into the buffer, or
      *             <code>-1</code> if there is no more data because the end of
      *             the stream has been reached.
      * @exception  IOException  if an I/O error occurs.
      */
     public int read(byte[] buf, int off, int len) throws IOException {
         int i, c;
         for (i = 0; i < len; i++) {
             if ((c = read()) == -1) {
                 if (i == 0) // At end of stream, so we should
                     i = -1; // return -1 , NOT 0.
                 break;
             }
             buf[off+i] = (byte)c;
         }
         return i;
     }
     /**
      * Tests if this input stream supports marks. Currently this class
      * does not support marks
      */
     public boolean markSupported() {
         return false;
     }
     /**
      * Returns the number of bytes that can be read from this input
      * stream without blocking. The QP algorithm does not permit
      * a priori knowledge of the number of bytes after decoding, so
      * this method just invokes the <code>available</code> method
      * of the original input stream.
      */
     public int available() throws IOException {
         // This is bogus ! We don't really know how much
         // bytes are available *after* decoding
         return in.available();
     }
     /**** begin TEST program
     public static void main(String argv[]) throws Exception {
         FileInputStream infile = new FileInputStream(argv[0]);
         QPDecoderStream decoder = new QPDecoderStream(infile);
         int c;
         while ((c = decoder.read()) != -1)
             System.out.print((char)c);
         System.out.println();
     }
     *** end TEST program ****/
 }

Mercurial > jdk8-mips64-public > jaxws / annotate

src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/QPDecoderStream.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/messaging/saaj/packaging/mime/util/QPDecoderStream.java