static void M_log_solve_cubic(BigNumber nn, BigNumber rr, int places)
{
BigNumber tmp0, tmp1, tmp2, tmp3, guess;
int ii, maxp, tolerance, local_precision;
guess = new BigNumber();
tmp0 = new BigNumber();
tmp1 = new BigNumber();
tmp2 = new BigNumber();
tmp3 = new BigNumber();
BigNumber.M_get_log_guess(nn, guess);
tolerance = -(places + 4);
maxp = places + 16;
local_precision = 18;
ii = 0;
while (true)
{
BigNumber.Exp(guess, tmp1, local_precision);
BigNumber.Sub(tmp1, nn, tmp3);
BigNumber.Add(tmp1, nn, tmp2);
BigNumber.Div(tmp3, tmp2, tmp1, local_precision);
BigNumber.Mul(BigNumber.Two, tmp1, tmp0);
BigNumber.Sub(guess, tmp0, tmp3);
if (ii != 0)
{
if (((3 * tmp0.exponent) < tolerance) || (tmp0.signum == 0))
{
break;
}
}
BigNumber.Round(tmp3, guess, local_precision);
local_precision *= 3;
if (local_precision > maxp)
{
local_precision = maxp;
}
ii = 1;
}
BigNumber.Round(tmp3, rr, places);
}
