Sorry --- But this code is driving me a little crazy

1)     if (BUILTIN_TYPE(obj) == T_CLASS && FL_TEST(obj, FL_SINGLETON)) {
2)        RBASIC(klass)->klass = klass;
3)        RCLASS(klass)->super = 
RBASIC(rb_class_real(RCLASS(obj)->super))->klass;
4)       }
5)   else {
6)       VALUE metasuper = RBASIC(rb_class_real(super))->klass;
7)
8)   /* metaclass of a superclass may be NULL at boot time */
9)       if (metasuper) {
10)        RBASIC(klass)->klass = metasuper;
11)       }
12)    }

Questions:
  2)  This says (i think) set the metaclass: klass pointer to the 
current Object?
  3)  and set the metaclass: super pointer to the first real object in 
the base classes
       super inheritance tree.

   and beyond that I seem to be lost!!   -- Can this be explained in 
plain english?

   Thanks in advance.               Chuck T.