1 /*
2 * Copyright (c) 1997, 2013, 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
46 /**
47 * Create a Q-decoder that decodes the specified input stream.
48 * @param in the input stream
49 */
50 public QDecoderStream(InputStream in) {
51 super(in);
52 }
53
54 /**
55 * Read the next decoded byte from this input stream. The byte
56 * is returned as an <code>int</code> in the range <code>0</code>
57 * to <code>255</code>. If no byte is available because the end of
58 * the stream has been reached, the value <code>-1</code> is returned.
59 * This method blocks until input data is available, the end of the
60 * stream is detected, or an exception is thrown.
61 *
62 * @return the next byte of data, or <code>-1</code> if the end of the
63 * stream is reached.
64 * @exception IOException if an I/O error occurs.
65 */
66 public int read() throws IOException {
67 int c = in.read();
68
69 if (c == '_') // Return '_' as ' '
70 return ' ';
71 else if (c == '=') {
72 // QP Encoded atom. Get the next two bytes ..
73 ba[0] = (byte)in.read();
74 ba[1] = (byte)in.read();
75 // .. and decode them
76 try {
77 return ASCIIUtility.parseInt(ba, 0, 2, 16);
78 } catch (NumberFormatException nex) {
79 throw new IOException("Error in QP stream " + nex.getMessage());
80 }
81 } else
82 return c;
83 }
84 }
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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
46 /**
47 * Create a Q-decoder that decodes the specified input stream.
48 * @param in the input stream
49 */
50 public QDecoderStream(InputStream in) {
51 super(in);
52 }
53
54 /**
55 * Read the next decoded byte from this input stream. The byte
56 * is returned as an <code>int</code> in the range <code>0</code>
57 * to <code>255</code>. If no byte is available because the end of
58 * the stream has been reached, the value <code>-1</code> is returned.
59 * This method blocks until input data is available, the end of the
60 * stream is detected, or an exception is thrown.
61 *
62 * @return the next byte of data, or <code>-1</code> if the end of the
63 * stream is reached.
64 * @exception IOException if an I/O error occurs.
65 */
66 @Override
67 public int read() throws IOException {
68 int c = in.read();
69
70 if (c == '_') // Return '_' as ' '
71 return ' ';
72 else if (c == '=') {
73 // QP Encoded atom. Get the next two bytes ..
74 ba[0] = (byte)in.read();
75 ba[1] = (byte)in.read();
76 // .. and decode them
77 try {
78 return ASCIIUtility.parseInt(ba, 0, 2, 16);
79 } catch (NumberFormatException nex) {
80 throw new IOException("Error in QP stream " + nex.getMessage());
81 }
82 } else
83 return c;
84 }
85 }
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