679         ActiveEdge *grandparent = nullptr;  in insert()  local
711                     int dir2 = (top->fChild[1] == grandparent);  in insert()
713                         top->fChild[dir2] = SingleRotation(grandparent, !last);  in insert()
715                         top->fChild[dir2] = DoubleRotation(grandparent, !last);  in insert()
725                     int dir2 = (top->fChild[1] == grandparent);  in insert()
727                         top->fChild[dir2] = SingleRotation(grandparent, !last);  in insert()
729                         top->fChild[dir2] = DoubleRotation(grandparent, !last);  in insert()
754             if (grandparent) {  in insert()
755                 top = grandparent;  in insert()
757             grandparent = parent;  in insert()
837         ActiveEdge* grandparent = nullptr;  in remove()  local
846             grandparent = parent;  in remove()
881                             int dir2 = (grandparent->fChild[1] == parent);  in remove()
884                                 grandparent->fChild[dir2] = DoubleRotation(parent, last);  in remove()
886                                 grandparent->fChild[dir2] = SingleRotation(parent, last);  in remove()
890                             curr->fRed = grandparent->fChild[dir2]->fRed = true;  in remove()
891                             grandparent->fChild[dir2]->fChild[0]->fRed = false;  in remove()
892                             grandparent->fChild[dir2]->fChild[1]->fRed = false;  in remove()