static void
test_cmp_z (mpfr_prec_t pmin, mpfr_prec_t pmax, int nmax)
{
mpfr_t x, z;
mpz_t y;
mpfr_prec_t p;
int res1, res2;
int n;
mpfr_init (x);
mpfr_init2 (z, MPFR_PREC_MIN);
mpz_init (y);
/* check the erange flag when x is NaN */
mpfr_set_nan (x);
mpz_set_ui (y, 17);
mpfr_clear_erangeflag ();
res1 = mpfr_cmp_z (x, y);
if (res1 != 0 || mpfr_erangeflag_p () == 0)
{
printf ("Error for mpfr_cmp_z (NaN, 17)\n");
printf ("Return value: expected 0, got %d\n", res1);
printf ("Erange flag: expected set, got %d\n", mpfr_erangeflag_p ());
exit (1);
}
for(p=pmin ; p < pmax ; p++)
{
mpfr_set_prec (x, p);
for ( n = 0; n < nmax ; n++)
{
mpfr_urandomb (x, RANDS);
mpz_urandomb (y, RANDS, 1024);
if (!MPFR_IS_SINGULAR (x))
{
mpfr_sub_z (z, x, y, MPFR_RNDN);
res1 = mpfr_sgn (z);
res2 = mpfr_cmp_z (x, y);
if (res1 != res2)
{
printf("Error for mpfr_cmp_z: res=%d sub_z gives %d\n",
res2, res1);
exit (1);
}
}
}
}
mpz_clear (y);
mpfr_clear (x);
mpfr_clear (z);
}
static void
test_cmp_z (mpfr_prec_t pmin, mpfr_prec_t pmax, int nmax)
{
mpfr_t x, z;
mpz_t y;
mpfr_prec_t p;
int res1, res2;
int n;
mpfr_init (x);
mpfr_init2 (z, MPFR_PREC_MIN);
mpz_init (y);
for(p=pmin ; p < pmax ; p++)
{
mpfr_set_prec (x, p);
for ( n = 0; n < nmax ; n++)
{
mpfr_urandomb (x, RANDS);
mpz_urandomb (y, RANDS, 1024);
if (!MPFR_IS_SINGULAR (x))
{
mpfr_sub_z (z, x, y, MPFR_RNDN);
res1 = mpfr_sgn (z);
res2 = mpfr_cmp_z (x, y);
if (res1 != res2)
{
printf("Error for mpfr_cmp_z: res=%d sub_z gives %d\n",
res2, res1);
exit (1);
}
}
}
}
mpz_clear (y);
mpfr_clear (x);
mpfr_clear (z);
}
static void
check_for_zero (void)
{
/* Check that 0 is unsigned! */
mpq_t q;
mpz_t z;
mpfr_t x;
int r;
mpfr_sign_t i;
mpfr_init (x);
mpz_init (z);
mpq_init (q);
mpz_set_ui (z, 0);
mpq_set_ui (q, 0, 1);
MPFR_SET_ZERO (x);
RND_LOOP (r)
{
for (i = MPFR_SIGN_NEG ; i <= MPFR_SIGN_POS ;
i+=MPFR_SIGN_POS-MPFR_SIGN_NEG)
{
MPFR_SET_SIGN(x, i);
mpfr_add_z (x, x, z, (mpfr_rnd_t) r);
if (!MPFR_IS_ZERO(x) || MPFR_SIGN(x)!=i)
{
printf("GMP Zero errors for add_z & rnd=%s & s=%d\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r), i);
mpfr_dump (x);
exit (1);
}
mpfr_sub_z (x, x, z, (mpfr_rnd_t) r);
if (!MPFR_IS_ZERO(x) || MPFR_SIGN(x)!=i)
{
printf("GMP Zero errors for sub_z & rnd=%s & s=%d\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r), i);
mpfr_dump (x);
exit (1);
}
mpfr_mul_z (x, x, z, (mpfr_rnd_t) r);
if (!MPFR_IS_ZERO(x) || MPFR_SIGN(x)!=i)
{
printf("GMP Zero errors for mul_z & rnd=%s & s=%d\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r), i);
mpfr_dump (x);
exit (1);
}
mpfr_add_q (x, x, q, (mpfr_rnd_t) r);
if (!MPFR_IS_ZERO(x) || MPFR_SIGN(x)!=i)
{
printf("GMP Zero errors for add_q & rnd=%s & s=%d\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r), i);
mpfr_dump (x);
exit (1);
}
mpfr_sub_q (x, x, q, (mpfr_rnd_t) r);
if (!MPFR_IS_ZERO(x) || MPFR_SIGN(x)!=i)
{
printf("GMP Zero errors for sub_q & rnd=%s & s=%d\n",
mpfr_print_rnd_mode ((mpfr_rnd_t) r), i);
mpfr_dump (x);
exit (1);
}
}
}
mpq_clear (q);
mpz_clear (z);
mpfr_clear (x);
}
static void
reduced_expo_range (void)
{
mpfr_t x;
mpz_t z;
mpq_t q;
mpfr_exp_t emin;
int inex;
emin = mpfr_get_emin ();
set_emin (4);
mpfr_init2 (x, 32);
mpz_init (z);
mpfr_clear_flags ();
inex = mpfr_set_ui (x, 17, MPFR_RNDN);
MPFR_ASSERTN (inex == 0);
mpz_set_ui (z, 3);
inex = mpfr_mul_z (x, x, z, MPFR_RNDN);
if (inex != 0 || MPFR_IS_NAN (x) || mpfr_cmp_ui (x, 51) != 0)
{
printf ("Error 1 in reduce_expo_range: expected 51 with inex = 0,"
" got\n");
mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
printf ("with inex = %d\n", inex);
exit (1);
}
inex = mpfr_div_z (x, x, z, MPFR_RNDN);
if (inex != 0 || MPFR_IS_NAN (x) || mpfr_cmp_ui (x, 17) != 0)
{
printf ("Error 2 in reduce_expo_range: expected 17 with inex = 0,"
" got\n");
mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
printf ("with inex = %d\n", inex);
exit (1);
}
inex = mpfr_add_z (x, x, z, MPFR_RNDN);
if (inex != 0 || MPFR_IS_NAN (x) || mpfr_cmp_ui (x, 20) != 0)
{
printf ("Error 3 in reduce_expo_range: expected 20 with inex = 0,"
" got\n");
mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
printf ("with inex = %d\n", inex);
exit (1);
}
inex = mpfr_sub_z (x, x, z, MPFR_RNDN);
if (inex != 0 || MPFR_IS_NAN (x) || mpfr_cmp_ui (x, 17) != 0)
{
printf ("Error 4 in reduce_expo_range: expected 17 with inex = 0,"
" got\n");
mpfr_out_str (stdout, 10, 0, x, MPFR_RNDN);
printf ("with inex = %d\n", inex);
exit (1);
}
MPFR_ASSERTN (__gmpfr_flags == 0);
if (mpfr_cmp_z (x, z) <= 0)
{
printf ("Error 5 in reduce_expo_range: expected a positive value.\n");
exit (1);
}
mpz_clear (z);
mpq_init (q);
mpq_set_ui (q, 1, 1);
mpfr_set_ui (x, 16, MPFR_RNDN);
inex = mpfr_add_q (x, x, q, MPFR_RNDN);
if (inex != 0 || MPFR_IS_NAN (x) || mpfr_cmp_ui (x, 17) != 0)
{
printf ("Error in reduce_expo_range for 16 + 1/1,"
" got inex = %d and\nx = ", inex);
mpfr_dump (x);
exit (1);
}
inex = mpfr_sub_q (x, x, q, MPFR_RNDN);
if (inex != 0 || MPFR_IS_NAN (x) || mpfr_cmp_ui (x, 16) != 0)
{
printf ("Error in reduce_expo_range for 17 - 1/1,"
" got inex = %d and\nx = ", inex);
mpfr_dump (x);
exit (1);
}
mpq_clear (q);
mpfr_clear (x);
set_emin (emin);
}
static PyObject *
GMPy_Real_Sub(PyObject *x, PyObject *y, CTXT_Object *context)
{
MPFR_Object *result;
CHECK_CONTEXT(context);
if (!(result = GMPy_MPFR_New(0, context)))
return NULL;
/* This only processes mpfr if the exponent is still in-bounds. Need
* to handle the rare case at the end. */
if (MPFR_Check(x) && MPFR_Check(y)) {
mpfr_clear_flags();
result->rc = mpfr_sub(result->f, MPFR(x), MPFR(y), GET_MPFR_ROUND(context));
goto done;
}
if (MPFR_Check(x)) {
if (PyIntOrLong_Check(y)) {
int error;
long temp = GMPy_Integer_AsLongAndError(y, &error);
if (!error) {
mpfr_clear_flags();
result->rc = mpfr_sub_si(result->f, MPFR(x), temp, GET_MPFR_ROUND(context));
goto done;
}
else {
mpz_t tempz;
mpz_inoc(tempz);
mpz_set_PyIntOrLong(tempz, y);
mpfr_clear_flags();
result->rc = mpfr_sub_z(result->f, MPFR(x), tempz, GET_MPFR_ROUND(context));
mpz_cloc(tempz);
goto done;
}
}
if (CHECK_MPZANY(y)) {
mpfr_clear_flags();
result->rc = mpfr_sub_z(result->f, MPFR(x), MPZ(y), GET_MPFR_ROUND(context));
goto done;
}
if (IS_RATIONAL(y)) {
MPQ_Object *tempy;
if (!(tempy = GMPy_MPQ_From_Number(y, context))) {
Py_DECREF((PyObject*)result);
return NULL;
}
mpfr_clear_flags();
result->rc = mpfr_sub_q(result->f, MPFR(x), tempy->q, GET_MPFR_ROUND(context));
Py_DECREF((PyObject*)tempy);
goto done;
}
if (PyFloat_Check(y)) {
mpfr_clear_flags();
result->rc = mpfr_sub_d(result->f, MPFR(x), PyFloat_AS_DOUBLE(y), GET_MPFR_ROUND(context));
goto done;
}
}
if (MPFR_Check(y)) {
if (PyIntOrLong_Check(x)) {
int error;
long temp = GMPy_Integer_AsLongAndError(x, &error);
if (!error) {
mpfr_clear_flags();
result->rc = mpfr_sub_si(result->f, MPFR(y), temp, GET_MPFR_ROUND(context));
mpfr_neg(result->f, result->f, GET_MPFR_ROUND(context));
goto done;
}
else {
mpz_t tempz;
mpz_inoc(tempz);
mpz_set_PyIntOrLong(tempz, x);
mpfr_clear_flags();
result->rc = mpfr_sub_z(result->f, MPFR(y), tempz, GET_MPFR_ROUND(context));
mpfr_neg(result->f, result->f, GET_MPFR_ROUND(context));
mpz_cloc(tempz);
goto done;
}
}
if (CHECK_MPZANY(x)) {
mpfr_clear_flags();
result->rc = mpfr_sub_z(result->f, MPFR(y), MPZ(x), GET_MPFR_ROUND(context));
mpfr_neg(result->f, result->f, GET_MPFR_ROUND(context));
goto done;
}
if (IS_RATIONAL(x)) {
MPQ_Object *tempx;
if (!(tempx = GMPy_MPQ_From_Number(x, context))) {
Py_DECREF((PyObject*)result);
return NULL;
}
mpfr_clear_flags();
result->rc = mpfr_sub_q(result->f, MPFR(y), tempx->q, GET_MPFR_ROUND(context));
mpfr_neg(result->f, result->f, GET_MPFR_ROUND(context));
Py_DECREF((PyObject*)tempx);
goto done;
}
if (PyFloat_Check(x)) {
mpfr_clear_flags();
result->rc = mpfr_sub_d(result->f, MPFR(y), PyFloat_AS_DOUBLE(x), GET_MPFR_ROUND(context));
mpfr_neg(result->f, result->f, GET_MPFR_ROUND(context));
goto done;
}
}
if (IS_REAL(x) && IS_REAL(y)) {
MPFR_Object *tempx, *tempy;
tempx = GMPy_MPFR_From_Real(x, 1, context);
tempy = GMPy_MPFR_From_Real(y, 1, context);
if (!tempx || !tempy) {
Py_XDECREF((PyObject*)tempx);
Py_XDECREF((PyObject*)tempy);
Py_DECREF((PyObject*)result);
return NULL;
}
mpfr_clear_flags();
result->rc = mpfr_sub(result->f, MPFR(tempx), MPFR(tempy), GET_MPFR_ROUND(context));
Py_DECREF((PyObject*)tempx);
Py_DECREF((PyObject*)tempy);
goto done;
}
Py_DECREF((PyObject*)result);
Py_RETURN_NOTIMPLEMENTED;
done:
GMPY_MPFR_CLEANUP(result, context, "subtraction");
return (PyObject*)result;
}