199 	u_check_tree(uhp->uh_alt_next.ptr, uhp->uh_next.ptr, uhp);  in u_check_tree()
543 	    else if (uhfree->uh_alt_next.ptr == NULL)  in u_savecommon()
549 		while (uhfree->uh_alt_next.ptr != NULL)  in u_savecommon()
550 		    uhfree = uhfree->uh_alt_next.ptr;  in u_savecommon()
568 	uhp->uh_alt_next.ptr = old_curhead;  in u_savecommon()
573 		uhp->uh_alt_prev.ptr->uh_alt_next.ptr = uhp;  in u_savecommon()
1292     put_header_ptr(bi, uhp->uh_alt_next.ptr);  in serialize_uhp()
1341     uhp->uh_alt_next.seq = undo_read_4c(bi);  in unserialize_uhp()
1762 	else if (uhp->uh_alt_next.ptr != NULL  in u_write_undo()
1763 				     && uhp->uh_alt_next.ptr->uh_walk != mark)  in u_write_undo()
1764 	    uhp = uhp->uh_alt_next.ptr;  in u_write_undo()
2108 			      && uhp_table[j]->uh_seq == uhp->uh_alt_next.seq)  in u_read_undo()
2110 		uhp->uh_alt_next.ptr = uhp_table[j];  in u_read_undo()
2494 	    else if (uhp->uh_alt_next.ptr != NULL  in undo_time()
2495 		    && uhp->uh_alt_next.ptr->uh_walk != nomark  in undo_time()
2496 		    && uhp->uh_alt_next.ptr->uh_walk != mark)  in undo_time()
2497 		uhp = uhp->uh_alt_next.ptr;  in undo_time()
2595 		while (last->uh_alt_next.ptr != NULL  in undo_time()
2596 				    && last->uh_alt_next.ptr->uh_walk == mark)  in undo_time()
2597 		    last = last->uh_alt_next.ptr;  in undo_time()
2604 		    if (last->uh_alt_next.ptr != NULL)  in undo_time()
2605 			last->uh_alt_next.ptr->uh_alt_prev.ptr =  in undo_time()
2607 		    last->uh_alt_prev.ptr->uh_alt_next.ptr =  in undo_time()
2608 							last->uh_alt_next.ptr;  in undo_time()
2610 		    last->uh_alt_next.ptr = uhp;  in undo_time()
3124 	else if (uhp->uh_alt_next.ptr != NULL  in ex_undolist()
3125 		&& uhp->uh_alt_next.ptr->uh_walk != nomark  in ex_undolist()
3126 		&& uhp->uh_alt_next.ptr->uh_walk != mark)  in ex_undolist()
3127 	    uhp = uhp->uh_alt_next.ptr;  in ex_undolist()
3276 	if (uh->uh_alt_next.ptr != NULL)  in u_unch_branch()
3277 	    u_unch_branch(uh->uh_alt_next.ptr);	    // recursive  in u_unch_branch()
3348     if (uhp->uh_alt_next.ptr != NULL)  in u_freeheader()
3349 	u_freebranch(buf, uhp->uh_alt_next.ptr, uhpp);  in u_freeheader()
3352 	uhp->uh_alt_prev.ptr->uh_alt_next.ptr = NULL;  in u_freeheader()
3364 						 uhap = uhap->uh_alt_next.ptr)  in u_freeheader()
3391 	uhp->uh_alt_prev.ptr->uh_alt_next.ptr = NULL;  in u_freebranch()
3397 	if (tofree->uh_alt_next.ptr != NULL)  in u_freebranch()
3398 	    u_freebranch(buf, tofree->uh_alt_next.ptr, uhpp);   // recursive  in u_freebranch()
3631 	if (uhp->uh_alt_next.ptr != NULL)  in u_eval_tree()
3638 		u_eval_tree(uhp->uh_alt_next.ptr, alt_list);  in u_eval_tree()