/* Rmpc_get_max_prec - return the maximum precision of two mpc_t.
*
* Reads in the precision used for storing the two provided mpc_t
* variables and stores the maximum of the real and imaginary
* precision through the provided pointers.
*
* Args:
* real_prec: Pointer to store the necessary precision for real part.
* imag_prec: Pointer to store the necessary precision for imaginary part.
* z1: An mpc_t
* z2: An mpc_t
* Return value:
* None.
*/
static
void Rmpc_get_max_prec(mpfr_prec_t *real_prec,
mpfr_prec_t *imag_prec, mpc_t z1, mpc_t z2) {
mpfr_prec_t rp1, ip1, rp2, ip2;
mpc_get_prec2(&rp1, &ip1, z1);
mpc_get_prec2(&rp2, &ip2, z2);
*real_prec = max(rp1, rp2);
*imag_prec = max(ip1, ip2);
}
static PyObject *
GMPy_MPC_Repr_Slot(MPC_Object *self)
{
PyObject *result, *temp;
mpfr_prec_t rbits, ibits;
long rprec, iprec;
char fmtstr[60];
mpc_get_prec2(&rbits, &ibits, MPC(self));
rprec = (long)(log10(2) * (double)rbits) + 2;
iprec = (long)(log10(2) * (double)ibits) + 2;
if (rbits != DBL_MANT_DIG || ibits !=DBL_MANT_DIG)
sprintf(fmtstr, "mpc('{0:.%ld.%ldg}',(%ld,%ld))",
rprec, iprec, rbits, ibits);
else
sprintf(fmtstr, "mpc('{0:.%ld.%ldg}')", rprec, iprec);
temp = Py_BuildValue("s", fmtstr);
if (!temp)
return NULL;
result = PyObject_CallMethod(temp, "format", "O", self);
Py_DECREF(temp);
return result;
}
static PyObject *
GMPy_MPC_GetPrec_Attrib(MPC_Object *self, void *closure)
{
mpfr_prec_t rprec = 0, iprec = 0;
mpc_get_prec2(&rprec, &iprec, self->c);
return Py_BuildValue("(nn)", rprec, iprec);
}
/* R_mpc_get_prec - Return precision used for an MPC S3 object.
*
* Args:
* ptr - An MPC S3 object.
* Returns:
* Vector of length two for real and imaginary precision bits for MPC.
*/
SEXP R_mpc_get_prec(SEXP ptr) {
mpc_ptr z = (mpc_ptr)R_ExternalPtrAddr(ptr);
SEXP retVal;
if (z) {
PROTECT(retVal = Rf_allocVector(INTSXP, 2));
mpfr_prec_t real_prec, imag_prec;
mpc_get_prec2(&real_prec, &imag_prec, z);
INTEGER(retVal)[0] = real_prec;
INTEGER(retVal)[1] = imag_prec;
UNPROTECT(1);
return retVal;
}
return R_NilValue;
}
