power() [1/2]

ring_elem GF::power ( const ring_elem f, int n ) const

virtual

Reimplemented from Ring.

Definition at line 378 of file GF.cpp.

{
  if (f.get_int() != _ZERO)
    {
      int m = (f.get_int() * n) % Q1_;
      if (m <= 0) m += Q1_;
      return ring_elem(m);
    }
  else
    {
      // f == 0 element.
      if (n == 0)
        return ring_elem(_ONE);
      else if (n > 0)
        return ring_elem(_ZERO);
      else
        throw exc::division_by_zero_error();
    }
}

References _ONE, _ZERO, ring_elem::get_int(), and Q1_.