583 	uhp->uh_seq = ++curbuf->b_u_seq_last;  in u_savecommon()
584 	curbuf->b_u_seq_cur = uhp->uh_seq;  in u_savecommon()
1036     undo_write_bytes(bi, (long_u)(uhp != NULL ? uhp->uh_seq : 0), 4);  in put_header_ptr()
1294     undo_write_bytes(bi, uhp->uh_seq, 4);  in serialize_uhp()
1343     uhp->uh_seq = undo_read_4c(bi);  in unserialize_uhp()
1344     if (uhp->uh_seq <= 0)  in unserialize_uhp()
2085 			      && uhp_table[i]->uh_seq == uhp_table[j]->uh_seq)  in u_read_undo()
2092 				  && uhp_table[j]->uh_seq == uhp->uh_next.seq)  in u_read_undo()
2100 				  && uhp_table[j]->uh_seq == uhp->uh_prev.seq)  in u_read_undo()
2108 			      && uhp_table[j]->uh_seq == uhp->uh_alt_next.seq)  in u_read_undo()
2116 			      && uhp_table[j]->uh_seq == uhp->uh_alt_prev.seq)  in u_read_undo()
2122 	if (old_header_seq > 0 && old_idx < 0 && uhp->uh_seq == old_header_seq)  in u_read_undo()
2127 	if (new_header_seq > 0 && new_idx < 0 && uhp->uh_seq == new_header_seq)  in u_read_undo()
2132 	if (cur_header_seq > 0 && cur_idx < 0 && uhp->uh_seq == cur_header_seq)  in u_read_undo()
2452 		val = uhp->uh_seq;  in undo_time()
2460 		if ((step < 0 ? uhp->uh_seq <= curbuf->b_u_seq_cur  in undo_time()
2461 			      : uhp->uh_seq > curbuf->b_u_seq_cur)  in undo_time()
2464 				? uhp->uh_seq < closest_seq  in undo_time()
2465 				: uhp->uh_seq > closest_seq)  in undo_time()
2476 		    closest_seq = uhp->uh_seq;  in undo_time()
2484 		target = uhp->uh_seq;  in undo_time()
2565 					 || (uhp->uh_seq == target && !above))  in undo_time()
2626 		if (uhp->uh_seq == target && above)  in undo_time()
2641 		if (uhp->uh_seq == target)	// found it!  in undo_time()
2931     curbuf->b_u_seq_cur = curhead->uh_seq;  in u_undoredo()
2937 	    curbuf->b_u_seq_cur = curhead->uh_next.ptr->uh_seq;  in u_undoredo()
3042 	    uhp == NULL ? 0L : uhp->uh_seq,  in u_undo_end()
3100 							uhp->uh_seq, changes);  in ex_undolist()
3622 	dict_add_number(dict, "seq", uhp->uh_seq);  in u_eval_tree()