dirblk_t
#define D_DIRENT(dbp) ((hpfsdirent_t *)((caddr_t)dbp + sizeof(dirblk_t)))
#define D_DE(dbp, deoff) ((hpfsdirent_t *)((caddr_t)dbp + sizeof(dirblk_t) + (deoff)))
dirblk_t *dbp;
dbp = (dirblk_t *) bp->b_data;
deoff = sizeof(dirblk_t);
if (deoff > sizeof (dirblk_t)) {