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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2005 IBM Corporation and others. | |
3 | * All rights reserved. This program and the accompanying materials | |
4 | * are made available under the terms of the Eclipse Public License v1.0 | |
5 | * which accompanies this distribution, and is available at | |
6 | * http://www.eclipse.org/legal/epl-v10.html | |
7 | * | |
8 | * Contributors: | |
9 | * IBM Corporation - initial API and implementation | |
10 | *******************************************************************************/ | |
11 | package org.eclipse.jdt.internal.ui.refactoring.nls.search; | |
12 | ||
13 | import java.io.BufferedReader; | |
14 | import java.io.IOException; | |
15 | import java.io.InputStream; | |
16 | import java.io.InputStreamReader; | |
17 | import java.io.Reader; | |
18 | ||
19 | ||
20 | class LineReader extends Object { | |
21 | protected static final int LF= '\n'; | |
22 | protected static final int CR= '\r'; | |
23 | ||
24 | private BufferedReader fReader; | |
25 | ||
26 | protected int fPushbackChar; | |
27 | protected boolean fPushback; | |
28 | ||
29 | public LineReader(InputStream in, String encoding) throws IOException { | |
30 | this(new InputStreamReader(in, encoding)); | |
31 | } | |
32 | ||
33 | public LineReader(Reader reader) { | |
34 | fPushback= false; | |
35 | fReader= new BufferedReader(reader); | |
36 | } | |
37 | ||
38 | public int readLine(StringBuffer sb) throws IOException { | |
39 | int ch= -1; | |
40 | sb.setLength(0); | |
41 | if (fPushback) { | |
42 | ch= fPushbackChar; | |
43 | fPushback= false; | |
44 | } else | |
45 | ch= fReader.read(); | |
46 | while (ch >= 0) { | |
47 | if (ch == LF) | |
48 | return 1; | |
49 | if (ch == CR) { | |
50 | ch= fReader.read(); | |
51 | if (ch == LF) | |
52 | return 2; | |
53 | else { | |
54 | fPushbackChar= ch; | |
55 | fPushback= true; | |
56 | return 1; | |
57 | } | |
58 | } | |
59 | sb.append((char) ch); | |
60 | ch= fReader.read(); | |
61 | } | |
62 | return -1; | |
63 | } | |
64 | ||
65 | public void close() throws IOException { | |
66 | fReader.close(); | |
67 | } | |
68 | } |