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/*
* Copyright (C) 2025, Google LLC
*
* 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.midx;
class MultiPackIndexConstants {
static final int MIDX_SIGNATURE = 0x4d494458; /* MIDX */
static final byte MIDX_VERSION = 1;
/**
* We infer the length of object IDs (OIDs) from this value:
*
* <pre>
* 1 => SHA-1
* 2 => SHA-256
* </pre>
*/
static final byte OID_HASH_VERSION = 1;
static final int MULTIPACK_INDEX_FANOUT_SIZE = 4 * 256;
/**
* First 4 bytes describe the chunk id. Value 0 is a terminating label.
* Other 8 bytes provide the byte-offset in current file for chunk to start.
*/
static final int CHUNK_LOOKUP_WIDTH = 12;
/** "PNAM" chunk */
static final int MIDX_CHUNKID_PACKNAMES = 0x504e414d;
/** "OIDF" chunk */
static final int MIDX_CHUNKID_OIDFANOUT = 0x4f494446;
/** "OIDL" chunk */
static final int MIDX_CHUNKID_OIDLOOKUP = 0x4f49444c;
/** "OOFF" chunk */
static final int MIDX_CHUNKID_OBJECTOFFSETS = 0x4f4f4646;
/** "LOFF" chunk */
static final int MIDX_CHUNKID_LARGEOFFSETS = 0x4c4f4646;
/** "RIDX" chunk */
static final int MIDX_CHUNKID_REVINDEX = 0x52494458;
/** "BTMP" chunk */
static final int MIDX_CHUNKID_BITMAPPEDPACKS = 0x42544D50;
private MultiPackIndexConstants() {
}
}
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