// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package os

import "syscall"

func isSymlink(stat *syscall.Stat_t) bool {
	return stat.Mode&syscall.S_IFMT == syscall.S_IFLNK
}

func dirFromStat(name string, dir *Dir, lstat, stat *syscall.Stat_t) *Dir {
	dir.Dev = uint64(stat.Dev)
	dir.Ino = uint64(stat.Ino)
	dir.Nlink = uint64(stat.Nlink)
	dir.Mode = uint32(stat.Mode)
	dir.Uid = stat.Uid
	dir.Gid = stat.Gid
	dir.Rdev = uint64(stat.Rdev)
	dir.Size = uint64(stat.Size)
	dir.Blksize = uint64(stat.Blksize)
	dir.Blocks = uint64(stat.Blocks)
	dir.Atime_ns = uint64(syscall.TimespecToNsec(stat.Atimespec))
	dir.Mtime_ns = uint64(syscall.TimespecToNsec(stat.Mtimespec))
	dir.Ctime_ns = uint64(syscall.TimespecToNsec(stat.Ctimespec))
	for i := len(name) - 1; i >= 0; i-- {
		if name[i] == '/' {
			name = name[i+1:]
			break
		}
	}
	dir.Name = name
	if isSymlink(lstat) && !isSymlink(stat) {
		dir.FollowedSymlink = true
	}
	return dir
}