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Issue 23229: add cmath.inf, cmath.nan, cmath.infj and cmath.nanj.

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This commit is contained in:
Mark Dickinson 2016-08-29 13:56:58 +01:00
parent 8631da64bb
commit 84e6311dee
4 changed files with 103 additions and 0 deletions
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54
Modules/cmathmodule.c
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@ -81,6 +81,54 @@ else {
#endif
#define CM_SCALE_DOWN (-(CM_SCALE_UP+1)/2)
/* Constants cmath.inf, cmath.infj, cmath.nan, cmath.nanj.
cmath.nan and cmath.nanj are defined only when either
PY_NO_SHORT_FLOAT_REPR is *not* defined (which should be
the most common situation on machines using an IEEE 754
representation), or Py_NAN is defined. */
static double
m_inf(void)
{
#ifndef PY_NO_SHORT_FLOAT_REPR
return _Py_dg_infinity(0);
#else
return Py_HUGE_VAL;
#endif
}
static Py_complex
c_infj(void)
{
Py_complex r;
r.real = 0.0;
r.imag = m_inf();
return r;
}
#if !defined(PY_NO_SHORT_FLOAT_REPR) || defined(Py_NAN)
static double
m_nan(void)
{
#ifndef PY_NO_SHORT_FLOAT_REPR
return _Py_dg_stdnan(0);
#else
return Py_NAN;
#endif
}
static Py_complex
c_nanj(void)
{
Py_complex r;
r.real = 0.0;
r.imag = m_nan();
return r;
}
#endif
/* forward declarations */
static Py_complex cmath_asinh_impl(PyObject *, Py_complex);
static Py_complex cmath_atanh_impl(PyObject *, Py_complex);
@ -1240,6 +1288,12 @@ PyInit_cmath(void)
PyFloat_FromDouble(Py_MATH_PI));
PyModule_AddObject(m, "e", PyFloat_FromDouble(Py_MATH_E));
PyModule_AddObject(m, "tau", PyFloat_FromDouble(Py_MATH_TAU)); /* 2pi */
PyModule_AddObject(m, "inf", PyFloat_FromDouble(m_inf()));
PyModule_AddObject(m, "infj", PyComplex_FromCComplex(c_infj()));
#if !defined(PY_NO_SHORT_FLOAT_REPR) || defined(Py_NAN)
PyModule_AddObject(m, "nan", PyFloat_FromDouble(m_nan()));
PyModule_AddObject(m, "nanj", PyComplex_FromCComplex(c_nanj()));
#endif
/* initialize special value tables */