#ifndef	_SYS_DIRENT_H_
#define	_SYS_DIRENT_H_

#include <machine/ansi.h>

/*
 * The dirent structure defines the format of directory entries returned by
 * the getdirentries(2) system call.
 *
 * A directory entry has a struct dirent at the front of it, containing its
 * inode number, the length of the entry, and the length of the name
 * contained in the entry.  These are followed by the name padded to a 8
 * byte boundary with null bytes.  All names are guaranteed null terminated.
 * The maximum length of a name in a directory is MAXNAMLEN.
 * Explicit pad is added between the last member of the header and
 * d_name, to avoid having the ABI padding in the end of dirent on
 * LP64 arches.  There is code depending on d_name being last.  Also,
 * keeping this pad for ILP32 architectures simplifies compat32 layer.
 */

struct dirent {
	ino_t      d_fileno;		/* file number of entry */
	off_t      d_off;		/* directory offset of the next entry */
	__uint16_t d_reclen;		/* length of this record */
	__uint8_t  d_type;		/* file type, see below */
	__uint8_t  d_namlen;		/* length of string in d_name */
	__uint32_t d_pad0;
#if __BSD_VISIBLE
#define	MAXNAMLEN	255
	char	d_name[MAXNAMLEN + 1];	/* name must be no longer than this */
#else
	char	d_name[255 + 1];	/* name must be no longer than this */
#endif
};

/*
 * File types
 */
#define	DT_UNKNOWN	 0
#define	DT_FIFO		 1
#define	DT_CHR		 2
#define	DT_DIR		 4
#define	DT_BLK		 6
#define	DT_REG		 8
#define	DT_LNK		10
#define	DT_SOCK		12
#define	DT_WHT		14

/*
 * Convert between stat structure types and directory types.
 */
#define	IFTODT(mode)	(((mode) & 0170000) >> 12)
#define	DTTOIF(dirtype)	((dirtype) << 12)

/*
 * The _GENERIC_DIRSIZ macro gives the minimum record length which will hold
 * the directory entry.  This returns the amount of space in struct direct
 * without the d_name field, plus enough space for the name with a terminating
 * null byte (dp->d_namlen+1), rounded up to a 8 byte boundary.
 *
 * XXX although this macro is in the implementation namespace, it requires
 * a manifest constant that is not.
 */
#define	_GENERIC_DIRLEN(namlen)						((__offsetof(struct dirent, d_name) + (namlen) + 1 + 7) & ~7)
#define	_GENERIC_DIRSIZ(dp)	_GENERIC_DIRLEN((dp)->d_namlen)
#endif /* __BSD_VISIBLE */

#ifdef _KERNEL
#define	GENERIC_DIRSIZ(dp)	_GENERIC_DIRSIZ(dp)
#endif

#endif /* !_SYS_DIRENT_H_ */