709         ActiveEdge *grandparent = nullptr;  in insert()  local
741                     int dir2 = (top->fChild[1] == grandparent);  in insert()
743                         top->fChild[dir2] = SingleRotation(grandparent, !last);  in insert()
745                         top->fChild[dir2] = DoubleRotation(grandparent, !last);  in insert()
755                     int dir2 = (top->fChild[1] == grandparent);  in insert()
757                         top->fChild[dir2] = SingleRotation(grandparent, !last);  in insert()
759                         top->fChild[dir2] = DoubleRotation(grandparent, !last);  in insert()
784             if (grandparent) {  in insert()
785                 top = grandparent;  in insert()
787             grandparent = parent;  in insert()
867         ActiveEdge* grandparent = nullptr;  in remove()  local
876             grandparent = parent;  in remove()
911                             int dir2 = (grandparent->fChild[1] == parent);  in remove()
914                                 grandparent->fChild[dir2] = DoubleRotation(parent, last);  in remove()
916                                 grandparent->fChild[dir2] = SingleRotation(parent, last);  in remove()
920                             curr->fRed = grandparent->fChild[dir2]->fRed = true;  in remove()
921                             grandparent->fChild[dir2]->fChild[0]->fRed = false;  in remove()
922                             grandparent->fChild[dir2]->fChild[1]->fRed = false;  in remove()