| /* |
| * Copyright (C) 2017, Google Inc. 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.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() { |
| } |
| } |