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Java > Open Source Codes > org > jruby > util > RubyInputStream


1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2002 Jan Arne Petersen <jpetersen@uni-bonn.de>
15  * Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
16  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
17  *
18  * Alternatively, the contents of this file may be used under the terms of
19  * either of the GNU General Public License Version 2 or later (the "GPL"),
20  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
21  * in which case the provisions of the GPL or the LGPL are applicable instead
22  * of those above. If you wish to allow use of your version of this file only
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24  * use your version of this file under the terms of the CPL, indicate your
25  * decision by deleting the provisions above and replace them with the notice
26  * and other provisions required by the GPL or the LGPL. If you do not delete
27  * the provisions above, a recipient may use your version of this file under
28  * the terms of any one of the CPL, the GPL or the LGPL.
29  ***** END LICENSE BLOCK *****/
30 package org.jruby.util;
31
32 import java.io.BufferedInputStream JavaDoc;
33 import java.io.IOException JavaDoc;
34 import java.io.InputStream JavaDoc;
35 import java.io.PushbackInputStream JavaDoc;
36
37
38 /**
39  *
40  * @author jpetersen
41  */
42 public class RubyInputStream extends PushbackInputStream JavaDoc {
43     public RubyInputStream(InputStream JavaDoc in) {
44         super(new BufferedInputStream JavaDoc(in));
45     }
46
47     public String JavaDoc gets(String JavaDoc separatorString) throws IOException JavaDoc {
48         if (separatorString == null) {
49             return getsEntireStream();
50         }
51         final char[] separator = separatorString.toCharArray();
52
53         int c = read();
54         if (c == -1) {
55             return null;
56         }
57
58         StringBuffer JavaDoc buffer = new StringBuffer JavaDoc();
59
60         LineLoop : while (true) {
61             while (c != separator[0] && c != -1) {
62                 buffer.append((char) c);
63                 c = read();
64             }
65             for (int i = 0; i < separator.length; i++) {
66                 if (c == -1) {
67                     break LineLoop;
68                 } else if (c != separator[i]) {
69                     continue LineLoop;
70                 }
71                 buffer.append((char) c);
72                 if (i < separator.length - 1) {
73                     c = read();
74                 }
75             }
76             break;
77         }
78         return buffer.toString();
79     }
80
81     private String JavaDoc getsEntireStream() throws IOException JavaDoc {
82         StringBuffer JavaDoc result = new StringBuffer JavaDoc();
83         int c;
84         while ((c = read()) != -1) {
85             result.append((char) c);
86         }
87         return result.toString();
88     }
89 }
90
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