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

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

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	/*
aoqi@0	27	* @(#)QDecoderStream.java 1.5 02/03/27
aoqi@0	28	*/
aoqi@0	29
aoqi@0	30
aoqi@0	31
aoqi@0	32	package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
aoqi@0	33
aoqi@0	34	import java.io.IOException;
aoqi@0	35	import java.io.InputStream;
aoqi@0	36
aoqi@0	37	/**
aoqi@0	38	* This class implements a Q Decoder as defined in RFC 2047
aoqi@0	39	* for decoding MIME headers. It subclasses the QPDecoderStream class.
aoqi@0	40	*
aoqi@0	41	* @author John Mani
aoqi@0	42	*/
aoqi@0	43
aoqi@0	44	public class QDecoderStream extends QPDecoderStream {
aoqi@0	45
aoqi@0	46	/**
aoqi@0	47	* Create a Q-decoder that decodes the specified input stream.
aoqi@0	48	* @param in the input stream
aoqi@0	49	*/
aoqi@0	50	public QDecoderStream(InputStream in) {
aoqi@0	51	super(in);
aoqi@0	52	}
aoqi@0	53
aoqi@0	54	/**
aoqi@0	55	* Read the next decoded byte from this input stream. The byte
aoqi@0	56	* is returned as an <code>int</code> in the range <code>0</code>
aoqi@0	57	* to <code>255</code>. If no byte is available because the end of
aoqi@0	58	* the stream has been reached, the value <code>-1</code> is returned.
aoqi@0	59	* This method blocks until input data is available, the end of the
aoqi@0	60	* stream is detected, or an exception is thrown.
aoqi@0	61	*
aoqi@0	62	* @return the next byte of data, or <code>-1</code> if the end of the
aoqi@0	63	* stream is reached.
aoqi@0	64	* @exception IOException if an I/O error occurs.
aoqi@0	65	*/
aoqi@0	66	public int read() throws IOException {
aoqi@0	67	int c = in.read();
aoqi@0	68
aoqi@0	69	if (c == '_') // Return '_' as ' '
aoqi@0	70	return ' ';
aoqi@0	71	else if (c == '=') {
aoqi@0	72	// QP Encoded atom. Get the next two bytes ..
aoqi@0	73	ba[0] = (byte)in.read();
aoqi@0	74	ba[1] = (byte)in.read();
aoqi@0	75	// .. and decode them
aoqi@0	76	try {
aoqi@0	77	return ASCIIUtility.parseInt(ba, 0, 2, 16);
aoqi@0	78	} catch (NumberFormatException nex) {
aoqi@0	79	throw new IOException("Error in QP stream " + nex.getMessage());
aoqi@0	80	}
aoqi@0	81	} else
aoqi@0	82	return c;
aoqi@0	83	}
aoqi@0	84	}