Wed, 27 Apr 2016 01:27:09 +0800
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/jaxws/
changeset: 657:d47a47f961ee
tag: jdk8u25-b17
1 /*
2 * Copyright (c) 1997, 2012, 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 */
26 /*
27 * @(#)LineInputStream.java 1.7 03/01/07
28 */
32 package com.sun.xml.internal.messaging.saaj.packaging.mime.util;
34 import java.io.*;
36 /**
37 * This class is to support reading CRLF terminated lines that
38 * contain only US-ASCII characters from an input stream. Provides
39 * functionality that is similar to the deprecated
40 * <code>DataInputStream.readLine()</code>. Expected use is to read
41 * lines as String objects from a RFC822 stream.
42 *
43 * It is implemented as a FilterInputStream, so one can just wrap
44 * this class around any input stream and read bytes from this filter.
45 *
46 * @author John Mani
47 */
49 public final class LineInputStream extends FilterInputStream {
51 private char[] lineBuffer = null; // reusable byte buffer
53 public LineInputStream(InputStream in) {
54 super(in);
55 }
57 /**
58 * Read a line containing only ASCII characters from the input
59 * stream. A line is terminated by a CR or NL or CR-NL sequence.
60 * A common error is a CR-CR-NL sequence, which will also terminate
61 * a line.
62 * The line terminator is not returned as part of the returned
63 * String. Returns null if no data is available. <p>
64 *
65 * This class is similar to the deprecated
66 * <code>DataInputStream.readLine()</code>
67 */
68 public String readLine() throws IOException {
69 InputStream in = this.in;
70 char[] buf = lineBuffer;
72 if (buf == null)
73 buf = lineBuffer = new char[128];
75 int c1;
76 int room = buf.length;
77 int offset = 0;
79 while ((c1 = in.read()) != -1) {
80 if (c1 == '\n') // Got NL, outa here.
81 break;
82 else if (c1 == '\r') {
83 // Got CR, is the next char NL ?
84 int c2 = in.read();
85 if (c2 == '\r') // discard extraneous CR
86 c2 = in.read();
87 if (c2 != '\n') {
88 // If not NL, push it back
89 if (!(in instanceof PushbackInputStream))
90 in = this.in = new PushbackInputStream(in);
91 ((PushbackInputStream)in).unread(c2);
92 }
93 break; // outa here.
94 }
96 // Not CR, NL or CR-NL ...
97 // .. Insert the byte into our byte buffer
98 if (--room < 0) { // No room, need to grow.
99 buf = new char[offset + 128];
100 room = buf.length - offset - 1;
101 System.arraycopy(lineBuffer, 0, buf, 0, offset);
102 lineBuffer = buf;
103 }
104 buf[offset++] = (char)c1;
105 }
107 if ((c1 == -1) && (offset == 0))
108 return null;
110 return String.copyValueOf(buf, 0, offset);
111 }
112 }