Python mpfr_get_emax 예제들

예제 #1

파일: context.py 프로젝트: mdickinson/bigfloat

def _temporary_exponent_bounds(emin, emax):
    old_emin = mpfr.mpfr_get_emin()
    mpfr.mpfr_set_emin(emin)
    try:
        old_emax = mpfr.mpfr_get_emax()
        mpfr.mpfr_set_emax(emax)
        try:
            yield
        finally:
            mpfr.mpfr_set_emax(old_emax)
    finally:
        mpfr.mpfr_set_emin(old_emin)

예제 #2

파일: context.py 프로젝트: scdeploy/bigfloat

def _temporary_exponent_bounds(emin, emax):
    old_emin = mpfr.mpfr_get_emin()
    mpfr.mpfr_set_emin(emin)
    try:
        old_emax = mpfr.mpfr_get_emax()
        mpfr.mpfr_set_emax(emax)
        try:
            yield
        finally:
            mpfr.mpfr_set_emax(old_emax)
    finally:
        mpfr.mpfr_set_emin(old_emin)

예제 #3

파일: test_context.py 프로젝트: MingyanZhao/GM_AS2

    def test__temporary_exponent_bounds(self):
        # Failed calls to _temporary_exponent_bounds shouldn't affect emin or
        # emax.
        original_emin = mpfr.mpfr_get_emin()
        original_emax = mpfr.mpfr_get_emax()

        # Call to _temporary_exponent_bounds should restore original values.
        with _temporary_exponent_bounds(-10, 10):
            self.assertEqual(mpfr.mpfr_get_emin(), -10)
            self.assertEqual(mpfr.mpfr_get_emax(), 10)
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)

        # Even erroneous calls should restore originals.
        with self.assertRaises(OverflowError):
            with _temporary_exponent_bounds(-10, 10 ** 100):
                pass
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)

        with self.assertRaises(OverflowError):
            with _temporary_exponent_bounds(-10 ** 100, 10):
                pass
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)

        with self.assertRaises(OverflowError):
            with _temporary_exponent_bounds(-10 ** 100, 10 ** 100):
                pass
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)

예제 #4

파일: test_context.py 프로젝트: roxyboy/bigfloat

    def test__temporary_exponent_bounds(self):
        # Failed calls to _temporary_exponent_bounds shouldn't affect emin or
        # emax.
        original_emin = mpfr.mpfr_get_emin()
        original_emax = mpfr.mpfr_get_emax()

        # Call to _temporary_exponent_bounds should restore original values.
        with _temporary_exponent_bounds(-10, 10):
            self.assertEqual(mpfr.mpfr_get_emin(), -10)
            self.assertEqual(mpfr.mpfr_get_emax(), 10)
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)

        # Even erroneous calls should restore originals.
        with self.assertRaises(OverflowError):
            with _temporary_exponent_bounds(-10, 10**100):
                pass
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)

        with self.assertRaises(OverflowError):
            with _temporary_exponent_bounds(-10**100, 10):
                pass
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)

        with self.assertRaises(OverflowError):
            with _temporary_exponent_bounds(-10**100, 10**100):
                pass
        self.assertEqual(mpfr.mpfr_get_emin(), original_emin)
        self.assertEqual(mpfr.mpfr_get_emax(), original_emax)