NULL_PARENT       673 src/intervals.c   while (! NULL_PARENT (i))
NULL_PARENT       711 src/intervals.c   while (! NULL_PARENT (i))
NULL_PARENT       758 src/intervals.c 	  else if (NULL_PARENT (i))
NULL_PARENT       776 src/intervals.c 	  else if (NULL_PARENT (i))
NULL_PARENT      1410 src/intervals.c   while (! NULL_PARENT (successor))	   /* It's above us.  Subtract as
NULL_PARENT      1466 src/intervals.c   while (! NULL_PARENT (predecessor))	/* It's above us.  Go up,
NULL_PARENT        81 src/intervals.h   (! NULL_PARENT (i) && INTERVAL_PARENT (i)->left == (i))
NULL_PARENT        85 src/intervals.h   (! NULL_PARENT (i) && INTERVAL_PARENT (i)->right == (i))
NULL_PARENT        91 src/intervals.h #define ROOT_INTERVAL_P(i) NULL_PARENT (i)