RIGHT_ENTRY
cur = RIGHT_ENTRY(cur);
else if ((child = RIGHT_ENTRY(tmp)) != NULL
child = RIGHT_ENTRY(tmp);
child = RIGHT_ENTRY(tmp);
tmp = RIGHT_ENTRY(prev);
child = RIGHT_ENTRY(tmp);
tmp = RIGHT_ENTRY(tmp);
if ((child = RIGHT_ENTRY(entry)) != NULL && maxgap < child->maxgap)