Fix math.ceil() and math.floor() to fall back to __ceil__ and __floor__
methods (respectively). With Keir Mierle.
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 3d5640c..864df23 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -107,9 +107,28 @@
FUNC2(atan2, atan2,
"atan2(y, x)\n\nReturn the arc tangent (measured in radians) of y/x.\n"
"Unlike atan(y/x), the signs of both x and y are considered.")
-FUNC1(ceil, ceil,
- "ceil(x)\n\nReturn the ceiling of x as a float.\n"
- "This is the smallest integral value >= x.")
+
+static PyObject * math_ceil(PyObject *self, PyObject *number) {
+ static PyObject *ceil_str = NULL;
+ PyObject *method;
+
+ if (ceil_str == NULL) {
+ ceil_str = PyUnicode_FromString("__ceil__");
+ if (ceil_str == NULL)
+ return NULL;
+ }
+
+ method = _PyType_Lookup(Py_Type(number), ceil_str);
+ if (method == NULL)
+ return math_1(number, ceil);
+ else
+ return PyObject_CallFunction(method, "O", number);
+}
+
+PyDoc_STRVAR(math_ceil_doc,
+ "ceil(x)\n\nReturn the ceiling of x as a float.\n"
+ "This is the smallest integral value >= x.");
+
FUNC1(cos, cos,
"cos(x)\n\nReturn the cosine of x (measured in radians).")
FUNC1(cosh, cosh,
@@ -118,9 +137,28 @@
"exp(x)\n\nReturn e raised to the power of x.")
FUNC1(fabs, fabs,
"fabs(x)\n\nReturn the absolute value of the float x.")
-FUNC1(floor, floor,
- "floor(x)\n\nReturn the floor of x as a float.\n"
- "This is the largest integral value <= x.")
+
+static PyObject * math_floor(PyObject *self, PyObject *number) {
+ static PyObject *floor_str = NULL;
+ PyObject *method;
+
+ if (floor_str == NULL) {
+ floor_str = PyUnicode_FromString("__floor__");
+ if (floor_str == NULL)
+ return NULL;
+ }
+
+ method = _PyType_Lookup(Py_Type(number), floor_str);
+ if (method == NULL)
+ return math_1(number, floor);
+ else
+ return PyObject_CallFunction(method, "O", number);
+}
+
+PyDoc_STRVAR(math_floor_doc,
+ "floor(x)\n\nReturn the floor of x as a float.\n"
+ "This is the largest integral value <= x.");
+
FUNC2(fmod, fmod,
"fmod(x,y)\n\nReturn fmod(x, y), according to platform C."
" x % y may differ.")