NRINTERNAL
nbytes = NRINTERNAL;
h->linp[0] = h->upper = t->bt_psize - NRINTERNAL;
h->linp[1] = h->upper -= NRINTERNAL;
nbytes = NRINTERNAL;
nbytes = NRINTERNAL;
nbytes = NRINTERNAL;
h->linp[0] = h->upper = t->bt_psize - NRINTERNAL;
__PAST_END(h->linp, 1) = h->upper -= NRINTERNAL;
nbytes = NRINTERNAL;
nbytes = NRINTERNAL;