"bytes"
	"fmt"
	"syscall"
	"unsafe"
)

func direntNamlen(dirent *syscall.Dirent) (uint64, error) {
	const fixedHdr = uint16(unsafe.Offsetof(syscall.Dirent{}.Name))
	nameBuf := (*[unsafe.Sizeof(dirent.Name)]byte)(unsafe.Pointer(&dirent.Name[0]))
	const nameBufLen = uint16(len(nameBuf))
	limit := dirent.Reclen - fixedHdr
	if limit > nameBufLen {
		limit = nameBufLen
	}
	// Avoid bugs in long file names