static PyObject *
GMPy_Complex_Mul_2exp(PyObject *x, PyObject *y, CTXT_Object *context)
{
MPC_Object *result, *tempx;
unsigned long exp = 0;
CHECK_CONTEXT(context);
exp = c_ulong_From_Integer(y);
if (exp == (unsigned long)(-1) && PyErr_Occurred()) {
return NULL;
}
result = GMPy_MPC_New(0, 0, context);
tempx = GMPy_MPC_From_Complex(x, 1, 1, context);
if (!result || !tempx) {
Py_XDECREF((PyObject*)result);
Py_XDECREF((PyObject*)tempx);
return NULL;
}
result->rc = mpc_mul_2ui(result->c, tempx->c, exp, GET_MPC_ROUND(context));
Py_DECREF((PyObject*)tempx);
GMPY_MPC_CLEANUP(result, context, "mul_2exp()");
return (PyObject*)result;
}
static void
check_ternary_value (mpfr_prec_t prec_max, mpfr_prec_t step)
{
mpfr_prec_t prec;
mpc_t z;
mpfr_t f;
mpc_init2 (z, 2);
mpfr_init (f);
for (prec = 2; prec < prec_max; prec += step)
{
mpc_set_prec (z, prec);
mpfr_set_prec (f, prec);
mpc_set_ui (z, 1, MPC_RNDNN);
mpfr_set_ui (f, 1, MPFR_RNDN);
if (mpc_add_fr (z, z, f, MPC_RNDNZ))
{
printf ("Error in mpc_add_fr: 1+1 should be exact\n");
exit (1);
}
mpc_set_ui (z, 1, MPC_RNDNN);
mpc_mul_2ui (z, z, (unsigned long int) prec, MPC_RNDNN);
if (mpc_add_fr (z, z, f, MPC_RNDNN) == 0)
{
fprintf (stderr, "Error in mpc_add_fr: 2^prec+1 cannot be exact\n");
exit (1);
}
}
mpc_clear (z);
mpfr_clear (f);
}
static void
check_ternary_value (void)
{
mpc_t x, y, z;
mpfr_prec_t prec;
mpc_init2 (x, 2);
mpc_init2 (y, 2);
mpc_init2 (z, 2);
for (prec = 2; prec <= 1000; prec++)
{
mpc_set_prec (x, prec);
mpc_set_prec (y, prec);
mpc_set_ui (x, 1, MPC_RNDNN);
mpc_mul_2ui (x, x, (unsigned long int) prec, MPC_RNDNN);
mpc_set_ui (y, 1, MPC_RNDNN);
if (mpc_add (z, x, y, MPC_RNDNN) == 0)
{
fprintf (stderr, "Error in mpc_add: 2^(-prec)+1 cannot be exact\n");
exit (1);
}
}
mpc_clear (x);
mpc_clear (y);
mpc_clear (z);
}
