Mercurial > cpython-lru_cache-weakref
diff Modules/mathmodule.c @ 46499:80b16595e462 legacy-trunk
FreeBSD doesn't follow C99 for modf(inf); so add explicit
special-value handling to math.modf code.
| author | Mark Dickinson <dickinsm@gmail.com> |
|---|---|
| date | Sun, 20 Apr 2008 01:39:24 +0000 |
| parents | 648b4d01cccf |
| children | a20def0101de |
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--- a/Modules/mathmodule.c Sun Apr 20 01:22:30 2008 +0000 +++ b/Modules/mathmodule.c Sun Apr 20 01:39:24 2008 +0000 @@ -341,6 +341,15 @@ double y, x = PyFloat_AsDouble(arg); if (x == -1.0 && PyErr_Occurred()) return NULL; + /* some platforms don't do the right thing for NaNs and + infinities, so we take care of special cases directly. */ + if (!Py_IS_FINITE(x)) { + if (Py_IS_INFINITY(x)) + return Py_BuildValue("(dd)", copysign(0., x), x); + else if (Py_IS_NAN(x)) + return Py_BuildValue("(dd)", x, x); + } + errno = 0; PyFPE_START_PROTECT("in math_modf", return 0); x = modf(x, &y);