| /* |
| * Copyright (C) 2017, Google Inc. |
| * 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.internal.storage.reftable; |
| |
| class ReftableConstants { |
| static final byte[] FILE_HEADER_MAGIC = { 'R', 'E', 'F', 'T' }; |
| static final byte VERSION_1 = (byte) 1; |
| |
| static final int FILE_HEADER_LEN = 24; |
| static final int FILE_FOOTER_LEN = 68; |
| |
| static final byte FILE_BLOCK_TYPE = 'R'; |
| static final byte REF_BLOCK_TYPE = 'r'; |
| static final byte OBJ_BLOCK_TYPE = 'o'; |
| static final byte LOG_BLOCK_TYPE = 'g'; |
| static final byte INDEX_BLOCK_TYPE = 'i'; |
| |
| static final int VALUE_NONE = 0x0; |
| static final int VALUE_1ID = 0x1; |
| static final int VALUE_2ID = 0x2; |
| static final int VALUE_SYMREF = 0x3; |
| static final int VALUE_TYPE_MASK = 0x7; |
| |
| static final int LOG_NONE = 0x0; |
| static final int LOG_DATA = 0x1; |
| |
| static final int MAX_BLOCK_SIZE = (1 << 24) - 1; |
| static final int MAX_RESTARTS = 65535; |
| |
| static boolean isFileHeaderMagic(byte[] buf, int o, int n) { |
| return (n - o) >= FILE_HEADER_MAGIC.length |
| && buf[o + 0] == FILE_HEADER_MAGIC[0] |
| && buf[o + 1] == FILE_HEADER_MAGIC[1] |
| && buf[o + 2] == FILE_HEADER_MAGIC[2] |
| && buf[o + 3] == FILE_HEADER_MAGIC[3]; |
| } |
| |
| static long reverseUpdateIndex(long time) { |
| return 0xffffffffffffffffL - time; |
| } |
| |
| private ReftableConstants() { |
| } |
| } |