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Java > Open Source Codes > net > sf > drftpd > util > StripAsciiOutputStream


1 /*
2  * This file is part of DrFTPD, Distributed FTP Daemon.
3  *
4  * DrFTPD is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; either version 2 of the License, or
7  * (at your option) any later version.
8  *
9  * DrFTPD is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with DrFTPD; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  */
18 package net.sf.drftpd.util;
19
20 import java.io.IOException JavaDoc;
21 import java.io.OutputStream JavaDoc;
22
23 /**
24  * OutputStream filter that strips the \r from \r\n sequences.
25  *
26  * @author mog
27  * @version $Id: StripAsciiOutputStream.java,v 1.3 2004/02/10 00:03:32 mog Exp $
28  */
29 public class StripAsciiOutputStream extends OutputStream JavaDoc {
30
31     private OutputStream JavaDoc _out;
32
33     boolean _lastWasCarriageReturn = false;
34
35     public StripAsciiOutputStream(OutputStream JavaDoc out) {
36         _out = out;
37     }
38
39     public void write(int b) throws IOException JavaDoc {
40         if (b == '\r') {
41             _lastWasCarriageReturn = true;
42             return;
43         }
44
45         if (_lastWasCarriageReturn) {
46             _lastWasCarriageReturn = false;
47             if (b != '\n') {
48                 _out.write('\r');
49             }
50         }
51         _out.write(b);
52     }
53
54     public void close() throws IOException JavaDoc {
55         _out.close();
56     }
57
58     public void flush() throws IOException JavaDoc {
59         _out.flush();
60     }
61
62 }
63
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