block.h

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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
 * block.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_BLOCK_H
#define SQFS_BLOCK_H
 
#include "sqfs/predef.h"
 
#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 {
    sqfs_u64 start_offset;
 
    sqfs_u32 size;
 
    sqfs_u32 pad0;
};
 
typedef enum {
    SQFS_BLK_DONT_COMPRESS = 0x0001,
 
    SQFS_BLK_ALIGN = 0x0002,
 
    SQFS_BLK_DONT_FRAGMENT = 0x0004,
 
    SQFS_BLK_DONT_DEDUPLICATE = 0x0008,
 
    SQFS_BLK_IGNORE_SPARSE = 0x0010,
 
    SQFS_BLK_DONT_HASH = 0x0020,
 
    SQFS_BLK_IS_SPARSE = 0x0400,
 
    SQFS_BLK_FIRST_BLOCK = 0x0800,
 
    SQFS_BLK_LAST_BLOCK = 0x1000,
 
    SQFS_BLK_IS_FRAGMENT = 0x2000,
 
    SQFS_BLK_FRAGMENT_BLOCK = 0x4000,
 
    SQFS_BLK_IS_COMPRESSED = 0x8000,
 
    SQFS_BLK_USER_SETTABLE_FLAGS = 0x003F,
 
    SQFS_BLK_FLAGS_ALL = 0xFC3F,
} SQFS_BLK_FLAGS;
 
#endif /* SQFS_BLOCK_H */