--- a/Modules/mathmodule.c	Thu Jan 31 23:08:23 2008 +0000
+++ b/Modules/mathmodule.c	Fri Feb 01 06:22:46 2008 +0000
@@ -155,6 +155,21 @@
       "tanh(x)\n\nReturn the hyperbolic tangent of x.")
 
 static PyObject *
+math_trunc(PyObject *self, PyObject *number)
+{
+        /* XXX: The py3k branch gets better errors for this by using
+           _PyType_Lookup(), but since float's mro isn't set in py2.6,
+           we just use PyObject_CallMethod here. */
+	return PyObject_CallMethod(number, "__trunc__", NULL);
+}
+
+PyDoc_STRVAR(math_trunc_doc,
+"trunc(x:Real) -> Integral\n"
+"\n"
+"Truncates x to the nearest Integral toward 0. Uses the __trunc__ magic"
+"method.");
+
+static PyObject *
 math_frexp(PyObject *self, PyObject *arg)
 {
 	int i;
@@ -377,6 +392,7 @@
 	{"sqrt",	math_sqrt,	METH_O,		math_sqrt_doc},
 	{"tan",		math_tan,	METH_O,		math_tan_doc},
 	{"tanh",	math_tanh,	METH_O,		math_tanh_doc},
+ 	{"trunc",	math_trunc,	METH_O,		math_trunc_doc},
 	{NULL,		NULL}		/* sentinel */
 };