1 /*
2 * Copyright (C) 2006-2008, Shawn O. Pearce <spearce@spearce.org>
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 package org.eclipse.jgit.internal.storage.file;
45
46 import java.io.BufferedInputStream;
47 import java.io.EOFException;
48 import java.io.IOException;
49 import java.io.InputStream;
50
51 import org.eclipse.jgit.util.NB;
52
53 class XInputStream extends BufferedInputStream {
54 private final byte[] intbuf = new byte[8];
55
56 XInputStream(InputStream s) {
57 super(s);
58 }
59
60 synchronized byte[] readFully(final int len) throws IOException {
61 final byte[] b = new byte[len];
62 readFully(b, 0, len);
63 return b;
64 }
65
66 synchronized void readFully(byte[] b, int o, int len)
67 throws IOException {
68 int r;
69 while (len > 0 && (r = read(b, o, len)) > 0) {
70 o += r;
71 len -= r;
72 }
73 if (len > 0)
74 throw new EOFException();
75 }
76
77 int readUInt8() throws IOException {
78 final int r = read();
79 if (r < 0)
80 throw new EOFException();
81 return r;
82 }
83
84 long readUInt32() throws IOException {
85 readFully(intbuf, 0, 4);
86 return NB.decodeUInt32(intbuf, 0);
87 }
88 }