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Issue #23185: add math.inf and math.nan constants.

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This commit is contained in:
Mark Dickinson 2015-01-11 11:55:29 +00:00
parent 845b14cc8e
commit a5d0c7c2fd
5 changed files with 69 additions and 1 deletions
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35
Modules/mathmodule.c
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@ -223,6 +223,35 @@ lanczos_sum(double x)
return num/den;
}
/* Constant for +infinity, generated in the same way as float('inf'). */
static double
m_inf(void)
{
#ifndef PY_NO_SHORT_FLOAT_REPR
return _Py_dg_infinity(0);
#else
return Py_HUGE_VAL;
#endif
}
/* Constant nan value, generated in the same way as float('nan'). */
/* We don't currently assume that Py_NAN is defined everywhere. */
#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
}
#endif
static double
m_tgamma(double x)
{
@ -2009,7 +2038,11 @@ PyInit_math(void)
PyModule_AddObject(m, "pi", PyFloat_FromDouble(Py_MATH_PI));
PyModule_AddObject(m, "e", PyFloat_FromDouble(Py_MATH_E));
PyModule_AddObject(m, "inf", PyFloat_FromDouble(m_inf()));
#if !defined(PY_NO_SHORT_FLOAT_REPR) || defined(Py_NAN)
PyModule_AddObject(m, "nan", PyFloat_FromDouble(m_nan()));
#endif
finally:
finally:
return m;
}