| /* |
| * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.internal.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); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected void writeImpl() throws IOException { |
| writeTOC(2); |
| writeFanOutTable(); |
| writeObjectNames(); |
| writeCRCs(); |
| writeOffset32(); |
| writeOffset64(); |
| writeChecksumFooter(); |
| } |
| |
| private void writeObjectNames() throws IOException { |
| for (PackedObjectInfo oe : entries) |
| oe.copyRawTo(out); |
| } |
| |
| private void writeCRCs() throws IOException { |
| for (PackedObjectInfo oe : entries) { |
| NB.encodeInt32(tmp, 0, oe.getCRC()); |
| out.write(tmp, 0, 4); |
| } |
| } |
| |
| private void writeOffset32() throws IOException { |
| int o64 = 0; |
| for (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 (PackedObjectInfo oe : entries) { |
| final long o = oe.getOffset(); |
| if (MAX_OFFSET_32 < o) { |
| NB.encodeInt64(tmp, 0, o); |
| out.write(tmp, 0, 8); |
| } |
| } |
| } |
| } |