from_int()

ring_elem Z_mod::from_int ( mpz_srcptr n ) const

virtual

Implements Ring.

Definition at line 140 of file ZZp.cpp.

{
  //  cout << "from_int(";
  //  bignum_text_out(cout, n);
  //  cout << ") = " << endl;
  mpz_t result;
  mpz_init(result);
  mpz_mod_ui(result, n, P);
  int m = static_cast<int>(mpz_get_si(result));
  mpz_clear(result);
  //  cout << m << endl;
  if (m < 0) m += P;
  m = _log_table[m];
  return ring_elem(m);
}

References _log_table, P, and result().

Referenced by from_rational(), getElement< Z_mod >(), and promote().