mult_vec_to()

void Ring::mult_vec_to	(	vec &	v,
		const ring_elem	r,
		bool	opposite_mult ) const

Definition at line 408 of file ring-vecs.cpp.

{
  if (this->is_zero(r))
    {
      remove_vec(v);
      v = nullptr;
      return;
    }
  vecterm head;
  head.next = v;
  vec p = &head;
  while (p->next != nullptr)
    {
      // old version: this->mult_to(p->next->coeff, a);
      ring_elem c;
      if (opposite_mult)
        c = this->mult(p->next->coeff, r);
      else
        c = this->mult(r, p->next->coeff);
      p->next->coeff = c;
      if (this->is_zero(p->next->coeff))
        {
          vec tmp = p->next;
          p->next = tmp->next;
          remove_vec_node(tmp);
        }
      else
        p = p->next;
    }
  v = head.next;
}

References is_zero(), mult(), vec::next, p, remove_vec(), and remove_vec_node().

Referenced by mult_vec_matrix(), and tensor().