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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* data.h - This file is part of libsquashfs
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef SQFS_DATA_H
#define SQFS_DATA_H
#include "sqfs/predef.h"
/**
* @file data.h
*
* @brief Contains on-disk data structures for data block management
* and helper macros.
*/
#define SQFS_META_BLOCK_SIZE 8192
#define SQFS_IS_BLOCK_COMPRESSED(size) (((size) & (1 << 24)) == 0)
#define SQFS_ON_DISK_BLOCK_SIZE(size) ((size) & ((1 << 24) - 1))
#define SQFS_IS_SPARSE_BLOCK(size) (SQFS_ON_DISK_BLOCK_SIZE(size) == 0)
/**
* @struct sqfs_fragment_t
*
* @brief Data structure that makes up the fragment table entries.
*/
struct sqfs_fragment_t {
/**
* @brief Location of the fragment block on-disk.
*/
uint64_t start_offset;
/**
* @brief Size of the fragment block in bytes.
*/
uint32_t size;
/**
* @brief Unused. Always initialize this to 0.
*/
uint32_t pad0;
};
#endif /* SQFS_DATA_H */
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