453   unsigned int tau = h;  in bds_round()  local
472       tau = i;  in bds_round()
477   if (tau > 0) {  in bds_round()
478     memcpy(buf,     state->auth + (tau-1) * n, n);  in bds_round()
480     memcpy(buf + n, state->keep + ((tau-1) >> 1) * n, n);  in bds_round()
482   if (!((leaf_idx >> (tau + 1)) & 1) && (tau < h - 1)) {  in bds_round()
483     memcpy(state->keep + (tau >> 1)*n, state->auth + tau*n, n);  in bds_round()
485   if (tau == 0) {  in bds_round()
491     setTreeHeight(node_addr, (tau-1));  in bds_round()
492     setTreeIndex(node_addr, leaf_idx >> tau);  in bds_round()
493     hash_h(state->auth + tau * n, buf, pub_seed, node_addr, n);  in bds_round()
494     for (i = 0; i < tau; i++) {  in bds_round()
505     for (i = 0; i < ((tau < h - k) ? tau : (h - k)); i++) {  in bds_round()