1 /*
2 * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
3 * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
4 * and other copyright owners as documented in the project's IP log.
5 *
6 * This program and the accompanying materials are made available
7 * under the terms of the Eclipse Distribution License v1.0 which
8 * accompanies this distribution, is reproduced below, and is
9 * available at http://www.eclipse.org/org/documents/edl-v10.php
10 *
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
15 * conditions are met:
16 *
17 * - Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials provided
23 * with the distribution.
24 *
25 * - Neither the name of the Eclipse Foundation, Inc. nor the
26 * names of its contributors may be used to endorse or promote
27 * products derived from this software without specific prior
28 * written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
31 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
32 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
35 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
37 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
38 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
39 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
42 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 */
44
45 package org.eclipse.jgit.internal.storage.file;
46
47 import java.io.IOException;
48 import java.io.OutputStream;
49
50 import org.eclipse.jgit.internal.JGitText;
51 import org.eclipse.jgit.transport.PackedObjectInfo;
52 import org.eclipse.jgit.util.NB;
53
54 /**
55 * Creates the version 1 (old style) pack table of contents files.
56 *
57 * @see PackIndexWriter
58 * @see PackIndexV1
59 */
60 class PackIndexWriterV1 extends PackIndexWriter {
61 static boolean canStore(PackedObjectInfo oe) {
62 // We are limited to 4 GB per pack as offset is 32 bit unsigned int.
63 //
64 return oe.getOffset() >>> 1 < Integer.MAX_VALUE;
65 }
66
67 PackIndexWriterV1(final OutputStream dst) {
68 super(dst);
69 }
70
71 /** {@inheritDoc} */
72 @Override
73 protected void writeImpl() throws IOException {
74 writeFanOutTable();
75
76 for (PackedObjectInfo oe : entries) {
77 if (!canStore(oe))
78 throw new IOException(JGitText.get().packTooLargeForIndexVersion1);
79 NB.encodeInt32(tmp, 0, (int) oe.getOffset());
80 oe.copyRawTo(tmp, 4);
81 out.write(tmp);
82 }
83
84 writeChecksumFooter();
85 }
86 }