61 PySlice_New(PyObject *start, PyObject *stop, PyObject *step)  in PySlice_New()  argument
68     if (step == NULL) step = Py_None;  in PySlice_New()
69     Py_INCREF(step);  in PySlice_New()
75     obj->step = step;  in PySlice_New()
104                    Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step)  in PySlice_GetIndices()  argument
107     if (r->step == Py_None) {  in PySlice_GetIndices()
108         *step = 1;  in PySlice_GetIndices()
110         if (!_PyAnyInt_Check(r->step)) return -1;  in PySlice_GetIndices()
111         *step = PyInt_AsSsize_t(r->step);  in PySlice_GetIndices()
114         *start = *step < 0 ? length-1 : 0;  in PySlice_GetIndices()
121         *stop = *step < 0 ? -1 : length;  in PySlice_GetIndices()
129     if (*step == 0) return -1;  in PySlice_GetIndices()
135                 Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step)  in _PySlice_Unpack()  argument
142     if (r->step == Py_None) {  in _PySlice_Unpack()
143         *step = 1;  in _PySlice_Unpack()
146         if (!_PyEval_SliceIndex(r->step, step)) return -1;  in _PySlice_Unpack()
147         if (*step == 0) {  in _PySlice_Unpack()
157         if (*step < -PY_SSIZE_T_MAX)  in _PySlice_Unpack()
158             *step = -PY_SSIZE_T_MAX;  in _PySlice_Unpack()
162         *start = *step < 0 ? PY_SSIZE_T_MAX : 0;  in _PySlice_Unpack()
169         *stop = *step < 0 ? PY_SSIZE_T_MIN : PY_SSIZE_T_MAX;  in _PySlice_Unpack()
180                        Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t step)  in _PySlice_AdjustIndices()  argument
184     assert(step != 0);  in _PySlice_AdjustIndices()
185     assert(step >= -PY_SSIZE_T_MAX);  in _PySlice_AdjustIndices()
190             *start = (step < 0) ? -1 : 0;  in _PySlice_AdjustIndices()
194         *start = (step < 0) ? length - 1 : length;  in _PySlice_AdjustIndices()
200             *stop = (step < 0) ? -1 : 0;  in _PySlice_AdjustIndices()
204         *stop = (step < 0) ? length - 1 : length;  in _PySlice_AdjustIndices()
207     if (step < 0) {  in _PySlice_AdjustIndices()
209             return (*start - *stop - 1) / (-step) + 1;  in _PySlice_AdjustIndices()
214             return (*stop - *start - 1) / step + 1;  in _PySlice_AdjustIndices()
224                      Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step,  in PySlice_GetIndicesEx()  argument
227     if (_PySlice_Unpack((PyObject *)r, start, stop, step) < 0)  in PySlice_GetIndicesEx()
229     *slicelength = _PySlice_AdjustIndices(length, start, stop, *step);  in PySlice_GetIndicesEx()
236     PyObject *start, *stop, *step;  in slice_new()  local
238     start = stop = step = NULL;  in slice_new()
243     if (!PyArg_UnpackTuple(args, "slice", 1, 3, &start, &stop, &step))  in slice_new()
252     return PySlice_New(start, stop, step);  in slice_new()
265     Py_DECREF(r->step);  in slice_dealloc()
282     PyString_ConcatAndDel(&s, PyObject_Repr(r->step));  in slice_repr()
291     {"step", T_OBJECT, offsetof(PySliceObject, step), READONLY},
298     Py_ssize_t ilen, start, stop, step;  in slice_indices()  local
306     if (_PySlice_Unpack((PyObject *)self, &start, &stop, &step) < 0) {  in slice_indices()
309     _PySlice_AdjustIndices(ilen, &start, &stop, step);  in slice_indices()
311     return Py_BuildValue("(nnn)", start, stop, step);  in slice_indices()
325     return Py_BuildValue("O(OOO)", Py_TYPE(self), self->start, self->stop, self->step);  in slice_reduce()
354     if (PyObject_Cmp(v->step, w->step, &result) < 0)  in slice_compare()
371     Py_VISIT(v->step);  in slice_traverse()