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- /*
- * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- package org.eclipse.jgit.storage.file;
-
- import java.io.IOException;
- import java.io.OutputStream;
-
- import org.eclipse.jgit.transport.PackedObjectInfo;
- import org.eclipse.jgit.util.NB;
-
- /**
- * Creates the version 2 pack table of contents files.
- *
- * @see PackIndexWriter
- * @see PackIndexV2
- */
- class PackIndexWriterV2 extends PackIndexWriter {
- private static final int MAX_OFFSET_32 = 0x7fffffff;
- private static final int IS_OFFSET_64 = 0x80000000;
-
- PackIndexWriterV2(final OutputStream dst) {
- super(dst);
- }
-
- @Override
- protected void writeImpl() throws IOException {
- writeTOC(2);
- writeFanOutTable();
- writeObjectNames();
- writeCRCs();
- writeOffset32();
- writeOffset64();
- writeChecksumFooter();
- }
-
- private void writeObjectNames() throws IOException {
- for (final PackedObjectInfo oe : entries)
- oe.copyRawTo(out);
- }
-
- private void writeCRCs() throws IOException {
- for (final PackedObjectInfo oe : entries) {
- NB.encodeInt32(tmp, 0, oe.getCRC());
- out.write(tmp, 0, 4);
- }
- }
-
- private void writeOffset32() throws IOException {
- int o64 = 0;
- for (final PackedObjectInfo oe : entries) {
- final long o = oe.getOffset();
- if (o <= MAX_OFFSET_32)
- NB.encodeInt32(tmp, 0, (int) o);
- else
- NB.encodeInt32(tmp, 0, IS_OFFSET_64 | o64++);
- out.write(tmp, 0, 4);
- }
- }
-
- private void writeOffset64() throws IOException {
- for (final PackedObjectInfo oe : entries) {
- final long o = oe.getOffset();
- if (MAX_OFFSET_32 < o) {
- NB.encodeInt64(tmp, 0, o);
- out.write(tmp, 0, 8);
- }
- }
- }
- }
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