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Java > Open Source Codes > org > columba > ristretto > coder > CRLFFilterInputStream


1 /* ***** BEGIN LICENSE BLOCK *****
2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Mozilla Public License Version
5  * 1.1 (the "License"); you may not use this file except in compliance with
6  * the License. You may obtain a copy of the License at
7  * http://www.mozilla.org/MPL/
8  *
9  * Software distributed under the License is distributed on an "AS IS" basis,
10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11  * for the specific language governing rights and limitations under the
12  * License.
13  *
14  * The Original Code is Ristretto Mail API.
15  *
16  * The Initial Developers of the Original Code are
17  * Timo Stich and Frederik Dietz.
18  * Portions created by the Initial Developers are Copyright (C) 2004
19  * All Rights Reserved.
20  *
21  * Contributor(s):
22  *
23  * Alternatively, the contents of this file may be used under the terms of
24  * either the GNU General Public License Version 2 or later (the "GPL"), or
25  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
26  * in which case the provisions of the GPL or the LGPL are applicable instead
27  * of those above. If you wish to allow use of your version of this file only
28  * under the terms of either the GPL or the LGPL, and not to allow others to
29  * use your version of this file under the terms of the MPL, indicate your
30  * decision by deleting the provisions above and replace them with the notice
31  * and other provisions required by the GPL or the LGPL. If you do not delete
32  * the provisions above, a recipient may use your version of this file under
33  * the terms of any one of the MPL, the GPL or the LGPL.
34  *
35  * ***** END LICENSE BLOCK ***** */
36 package org.columba.ristretto.coder;
37
38 import java.io.FilterInputStream JavaDoc;
39 import java.io.IOException JavaDoc;
40 import java.io.InputStream JavaDoc;
41
42 /**
43  * FilterInputStream that removes all occurences of CRLF (ascii 10, 13)
44  * from the InputStream.
45  *
46  * @author Timo Stich<tstich@users.sourceforge.net>
47  */
48 public class CRLFFilterInputStream extends FilterInputStream JavaDoc {
49
50 protected byte[] buffer = new byte[1024];
51 protected int pos = 0;
52 protected int count = -1;
53
54 /**
55  * Constructs the CRLFFilterInputStream.
56  *
57  * @param in
58  */
59 public CRLFFilterInputStream( InputStream JavaDoc in ) {
60     super( in );
61 }
62
63
64 /**
65  * @see java.io.FilterInputStream#read()
66  */
67 public int read() throws IOException JavaDoc{
68     int next = in.read();
69     while( next == '\r' || next == '\n') {
70         next = in.read();
71     }
72     if( next == -1 ) return -1;
73     
74     return next;
75 }
76
77 /**
78  * @see java.io.InputStream#read(byte[], int, int)
79  */
80 public int read(byte[] arg0, int arg1, int arg2) throws IOException JavaDoc {
81     int next;
82     for( int i=0; i<arg2; i++) {
83         next = read();
84         if( next == -1 ) {
85             if( i == 0 ) {
86                 return -1;
87             } else {
88                 return i;
89             }
90         }
91         arg0[arg1+i] = (byte) next;
92     }
93     return arg2;
94 }
95
96
97 }
98
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