528 	PARENT(tp) = LEFT(tp) = RIGHT(tp) = LINKFOR(tp) = NULL;  in realfree()
547 						PARENT(tp) = np;  in realfree()
555 						PARENT(tp) = np;  in realfree()
559 					if ((sp = PARENT(np)) != NULL) {  in realfree()
564 						PARENT(tp) = sp;  in realfree()
570 						PARENT(sp) = tp;  in realfree()
574 						PARENT(sp) = tp;  in realfree()
703 			if ((RIGHT(x) = LEFT(y)) != NULL) PARENT(RIGHT(x)) = x;\
704 			if ((PARENT(y) = PARENT(x)) != NULL)\
705 				if (LEFT(PARENT(x)) == x) LEFT(PARENT(y)) = y;\
706 				else RIGHT(PARENT(y)) = y;\
707 			LEFT(y) = x; PARENT(x) = y
710 			if ((LEFT(x) = RIGHT(y)) != NULL) PARENT(LEFT(x)) = x;\
711 			if ((PARENT(y) = PARENT(x)) != NULL)\
712 				if (LEFT(PARENT(x)) == x) LEFT(PARENT(y)) = y;\
713 				else RIGHT(PARENT(y)) = y;\
714 			RIGHT(y) = x; PARENT(x) = y
717 			if ((RIGHT(x) = LEFT(y)) != NULL) PARENT(RIGHT(x)) = x;\
718 			if ((RIGHT(y) = LEFT(z)) != NULL) PARENT(RIGHT(y)) = y;\
719 			if ((PARENT(z) = PARENT(x)) != NULL)\
720 				if (LEFT(PARENT(x)) == x) LEFT(PARENT(z)) = z;\
721 				else RIGHT(PARENT(z)) = z;\
722 			LEFT(z) = y; PARENT(y) = z; LEFT(y) = x; PARENT(x) = y
725 			if ((LEFT(x) = RIGHT(y)) != NULL) PARENT(LEFT(x)) = x;\
726 			if ((LEFT(y) = RIGHT(z)) != NULL) PARENT(LEFT(y)) = y;\
727 			if ((PARENT(z) = PARENT(x)) != NULL)\
728 				if (LEFT(PARENT(x)) == x) LEFT(PARENT(z)) = z;\
729 				else RIGHT(PARENT(z)) = z;\
730 			RIGHT(z) = y; PARENT(y) = z; RIGHT(y) = x; PARENT(x) = y
733 			if ((RIGHT(y) = LEFT(z)) != NULL) PARENT(RIGHT(y)) = y;\
734 			if ((PARENT(z) = PARENT(x)) != NULL)\
735 				if (LEFT(PARENT(x)) == x) LEFT(PARENT(z)) = z;\
736 				else RIGHT(PARENT(z)) = z;\
737 			PARENT(x) = z; LEFT(z) = x;
740 			if ((LEFT(y) = RIGHT(z)) != NULL) PARENT(LEFT(y)) = y;\
741 			if ((PARENT(z) = PARENT(x)) != NULL)\
742 				if (LEFT(PARENT(x)) == x) LEFT(PARENT(z)) = z;\
743 				else RIGHT(PARENT(z)) = z;\
744 			PARENT(x) = z; RIGHT(z) = x;
764 	if (PARENT(op))  in t_delete()
769 		PARENT(tp) = NULL;  in t_delete()
771 			PARENT(sp) = tp;  in t_delete()
775 			PARENT(sp) = tp;  in t_delete()
784 		PARENT(tp) = NULL;  in t_delete()
800 			PARENT(RIGHT(tp)) = tp;  in t_delete()
803 		PARENT(tp) = NULL;  in t_delete()
819 	while ((pp = PARENT(tp)) != NULL) {  in t_splay()
821 		gp = PARENT(pp);  in t_splay()