01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.vfs;
30:
31: import java.io.IOException;
32: import java.io.InputStream;
33: import java.io.Reader;
34:
35: class Utf16RevReader extends Reader {
36: private InputStream is;
37:
38: /**
39: * Create a UTF-16 reader based on the readStream.
40: */
41: Utf16RevReader(InputStream is) {
42: this .is = is;
43: }
44:
45: /**
46: * Reads into a character buffer using the correct encoding.
47: */
48: public int read() throws IOException {
49: int ch1 = is.read();
50: int ch2 = is.read();
51:
52: if (ch2 < 0)
53: return -1;
54:
55: return (ch2 << 8) + ch1;
56: }
57:
58: /**
59: * Reads into a character buffer using the correct encoding.
60: */
61: public int read(char[] cbuf, int off, int len) throws IOException {
62: int i = 0;
63:
64: for (i = 0; i < len; i++) {
65: int ch1 = is.read();
66: int ch2 = is.read();
67:
68: if (ch1 < 0)
69: return i == 0 ? -1 : i;
70:
71: cbuf[off + i] = (char) ((ch2 << 8) + ch1);
72: }
73:
74: return i;
75: }
76:
77: /**
78: * Stub close does nothing.
79: */
80: public void close() {
81: }
82: }
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