reset_degree()

void M2::ARingTower::reset_degree ( ARingPolynomial & f ) const

private

Definition at line 118 of file aring-tower.cpp.

{
  if (f == nullptr) return;
  int fdeg = f->deg;
  for (int j = fdeg; j >= 0; --j)
    if (f->polys[j] != nullptr)
      {
        f->deg = j;
        return;
      }
  // at this point, everything is 0!
  dealloc_poly(f);  // sets f to 0
}

References dealloc_poly(), M2::ARingPolynomialStruct::deg, and M2::ARingPolynomialStruct::polys.

Referenced by add_in_place(), and subtract_in_place().