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Issue #9165: Add math.isfinite and cmath.isfinite.

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This commit is contained in:
Mark Dickinson 2010-07-11 17:38:24 +00:00
parent 3e7428995f
commit 8e0c996873
7 changed files with 61 additions and 0 deletions
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14
Modules/mathmodule.c
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@ -1817,6 +1817,19 @@ PyDoc_STRVAR(math_radians_doc,
"radians(x)\n\n\
Convert angle x from degrees to radians.");
static PyObject *
math_isfinite(PyObject *self, PyObject *arg)
{
double x = PyFloat_AsDouble(arg);
if (x == -1.0 && PyErr_Occurred())
return NULL;
return PyBool_FromLong((long)Py_IS_FINITE(x));
}
PyDoc_STRVAR(math_isfinite_doc,
"isfinite(x) -> bool\n\n\
Check if float x is finite (not an infinity or NaN).");
static PyObject *
math_isnan(PyObject *self, PyObject *arg)
{
@ -1868,6 +1881,7 @@ static PyMethodDef math_methods[] = {
{"fsum", math_fsum, METH_O, math_fsum_doc},
{"gamma", math_gamma, METH_O, math_gamma_doc},
{"hypot", math_hypot, METH_VARARGS, math_hypot_doc},
{"isfinite", math_isfinite, METH_O, math_isfinite_doc},
{"isinf", math_isinf, METH_O, math_isinf_doc},
{"isnan", math_isnan, METH_O, math_isnan_doc},
{"ldexp", math_ldexp, METH_VARARGS, math_ldexp_doc},