Function            rceil - rounds up

  Syntax              long rceil(struct REAL rx);

  Prototype in        real.h

  Remarks             rceil finds the smallest integer not less than rx.

                      Refer to the section SIMULATED FP MATH for further
                      details.

  Return value        rceil returns the integer found (as a long).

  See also            _r_minpre, _rmatherr
                      radd(), rdiv(), rfloor(), rnegate(), rnormalize(),
                      rsign(), rsub()