fromSmallIntegerCoefficients()

ring_elem PolyRing::fromSmallIntegerCoefficients	(	const std::vector< long > &	coeffs,
		int	var ) const

Definition at line 2249 of file poly.cpp.

{
  // create a poly
  SumCollector *H = make_SumCollector();
  exponents_t exp = ALLOCATE_EXPONENTS(EXPONENT_BYTE_SIZE(
      n_vars()));  // deallocates automatically at end of block
  exponents::one(n_vars(), exp);
  for (long i = 0; i < coeffs.size(); i++)
    {
      exp[var] = static_cast<int>(i);
      ring_elem c = K_->from_long(coeffs[i]);
      if (K_->is_zero(c)) continue;
      Nterm *t = new_term();
      t->coeff = c;
      t->next = nullptr;
      M_->from_expvector(exp, t->monom);
      H->add(t);
    }
  ring_elem result = H->getValue();
  delete H;
  return result;
}

References SumCollector::add(), ALLOCATE_EXPONENTS, Nterm::coeff, EXPONENT_BYTE_SIZE, SumCollector::getValue(), PolynomialRing::K_, PolynomialRing::M_, PolynomialRing::make_SumCollector(), Nterm::monom, PolynomialRing::n_vars(), new_term(), Nterm::next, ExponentVector< int, true >::one(), result(), and var().

Referenced by M2::ARingGFFlint::lift_to_original_ring(), and M2::ARingGFFlintBig::lift_to_original_ring().