1 /*
2 * Copyright (C) 2014, André de Oliveira <andre.oliveira@liferay.com>
3 *
4 * This program and the accompanying materials are made available
5 * under the terms of the Eclipse Distribution License v1.0 which
6 * accompanies this distribution, is reproduced below, and is
7 * available at http://www.eclipse.org/org/documents/edl-v10.php
8 *
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials provided
21 * with the distribution.
22 *
23 * - Neither the name of the Eclipse Foundation, Inc. nor the
24 * names of its contributors may be used to endorse or promote
25 * products derived from this software without specific prior
26 * written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
29 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
30 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
33 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
36 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
37 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
40 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 */
42 package org.eclipse.jgit.merge;
43
44 import java.io.IOException;
45 import java.io.OutputStream;
46
47 /**
48 * An output stream which is aware of newlines and can be asked to begin a new
49 * line if not already in one.
50 */
51 class EolAwareOutputStream extends OutputStream {
52 private final OutputStream out;
53
54 private boolean bol = true;
55
56 /**
57 * Initialize a new EOL aware stream.
58 *
59 * @param out
60 * stream to output all writes to.
61 */
62 EolAwareOutputStream(OutputStream out) {
63 this.out = out;
64 }
65
66 /**
67 * Begin a new line if not already in one.
68 *
69 * @exception IOException
70 * if an I/O error occurs.
71 */
72 void beginln() throws IOException {
73 if (!bol)
74 write('\n');
75 }
76
77 /** @return true if a new line has just begun. */
78 boolean isBeginln() {
79 return bol;
80 }
81
82 /** {@inheritDoc} */
83 @Override
84 public void write(int val) throws IOException {
85 out.write(val);
86 bol = (val == '\n');
87 }
88
89 /** {@inheritDoc} */
90 @Override
91 public void write(byte[] buf, int pos, int cnt) throws IOException {
92 if (cnt > 0) {
93 out.write(buf, pos, cnt);
94 bol = (buf[pos + (cnt - 1)] == '\n');
95 }
96 }
97 }