/* SPDX-License-Identifier: BSD-2-Clause */
/*
 * What erofs_fs.h, which is kept as it is in Linux, takes from Linux headers:
 * the integer and little-endian types, a few macros, and the file type
 * and magic definitions that Linux keeps elsewhere.
 */
#ifndef _FS_EROFS_COMPAT_H_
#define _FS_EROFS_COMPAT_H_

#include <sys/param.h>
#include <sys/endian.h>

typedef uint8_t		u8;
typedef uint8_t		__u8;
typedef uint32_t	__u32;
typedef uint16_t	__le16;
typedef uint32_t	__le32;
typedef uint64_t	__le64;

#define le16_to_cpu(x)		le16toh(x)
#define cpu_to_le64(x)		htole64(x)

#define BIT(n)			(1UL << (n))
#define BIT_ULL(n)		(1ULL << (n))
#define round_up(x, y)		roundup2((x), (y))

/* Fails to compile when the condition is true, as in Linux. */
#define BUILD_BUG_ON(cond)	((void)sizeof(char[1 - 2 * !!(cond)]))

/* include/uapi/linux/magic.h */
#define EROFS_SUPER_MAGIC_V1	0xE0F5E1E2

/*
 * File types in directory entries; Linux uses the generic FT_* values from
 * include/linux/fs_types.h.
 */
#define EROFS_FT_UNKNOWN	0
#define EROFS_FT_REG_FILE	1
#define EROFS_FT_DIR		2
#define EROFS_FT_CHRDEV		3
#define EROFS_FT_BLKDEV		4
#define EROFS_FT_FIFO		5
#define EROFS_FT_SOCK		6
#define EROFS_FT_SYMLINK	7

#endif