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Java > Open Source Codes > com > caucho > quercus > env > StringInputStream


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */

29
30 package com.caucho.quercus.env;
31
32 import java.io.InputStream JavaDoc;
33
34 /**
35  * Represents an ISO-8859-1 input stream.
36  */

37 public class StringInputStream extends InputStream JavaDoc {
38   private final String JavaDoc _string;
39   private final int _length;
40
41   private int _index;
42
43   public StringInputStream(String JavaDoc s)
44   {
45     _string = s;
46     _length = s.length();
47   }
48
49   public int read()
50   {
51     if (_index < _length)
52       return _string.charAt(_index++);
53     else
54       return -1;
55   }
56
57   public int read(byte []buffer, int offset, int length)
58   {
59     int sublen = _length - _index;
60
61     if (sublen == 0)
62       return -1;
63     
64     if (length < sublen)
65       sublen = length;
66
67     String JavaDoc s = _string;
68     int index = _index;
69
70     for (int i = 0; i < sublen; i++) {
71       buffer[offset + i] = (byte) s.charAt(index + i);
72     }
73
74     _index = index + sublen;
75
76     return sublen;
77   }
78 }
79
80
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