[Python-checkins] r76916 - python/trunk/Modules/mathmodule.c
mark.dickinson
python-checkins at python.org
Sun Dec 20 14:58:18 CET 2009
Author: mark.dickinson
Date: Sun Dec 20 14:58:18 2009
New Revision: 76916
Log:
math.factorial depends on PyLong_AsLong correctly converting floats; rewrite
it to do the conversion explicitly instead. See issue #7550.
Modified:
python/trunk/Modules/mathmodule.c
Modified: python/trunk/Modules/mathmodule.c
==============================================================================
--- python/trunk/Modules/mathmodule.c (original)
+++ python/trunk/Modules/mathmodule.c Sun Dec 20 14:58:18 2009
@@ -1082,15 +1082,22 @@
PyObject *result, *iobj, *newresult;
if (PyFloat_Check(arg)) {
+ PyObject *lx;
double dx = PyFloat_AS_DOUBLE((PyFloatObject *)arg);
- if (dx != floor(dx)) {
+ if (!(Py_IS_FINITE(dx) && dx == floor(dx))) {
PyErr_SetString(PyExc_ValueError,
"factorial() only accepts integral values");
return NULL;
}
+ lx = PyLong_FromDouble(dx);
+ if (lx == NULL)
+ return NULL;
+ x = PyLong_AsLong(lx);
+ Py_DECREF(lx);
}
+ else
+ x = PyInt_AsLong(arg);
- x = PyInt_AsLong(arg);
if (x == -1 && PyErr_Occurred())
return NULL;
if (x < 0) {
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