Lines Matching defs:step
109 /* start, stop, and step are python objects with None indicating no
114 PySlice_New(PyObject *start, PyObject *stop, PyObject *step)
116 if (step == NULL) {
117 step = Py_None;
140 Py_INCREF(step);
141 obj->step = step;
172 Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step)
176 if (r->step == Py_None) {
177 *step = 1;
179 if (!PyLong_Check(r->step)) return -1;
180 *step = PyLong_AsSsize_t(r->step);
183 *start = *step < 0 ? length-1 : 0;
190 *stop = *step < 0 ? -1 : length;
198 if (*step == 0) return -1;
204 Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step)
212 if (r->step == Py_None) {
213 *step = 1;
216 if (!_PyEval_SliceIndex(r->step, step)) return -1;
217 if (*step == 0) {
219 "slice step cannot be zero");
222 /* Here *step might be -PY_SSIZE_T_MAX-1; in this case we replace it
225 * does "step = -step" as part of a slice reversal.
227 if (*step < -PY_SSIZE_T_MAX)
228 *step = -PY_SSIZE_T_MAX;
232 *start = *step < 0 ? PY_SSIZE_T_MAX : 0;
239 *stop = *step < 0 ? PY_SSIZE_T_MIN : PY_SSIZE_T_MAX;
250 Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t step)
254 assert(step != 0);
255 assert(step >= -PY_SSIZE_T_MAX);
260 *start = (step < 0) ? -1 : 0;
264 *start = (step < 0) ? length - 1 : length;
270 *stop = (step < 0) ? -1 : 0;
274 *stop = (step < 0) ? length - 1 : length;
277 if (step < 0) {
279 return (*start - *stop - 1) / (-step) + 1;
284 return (*stop - *start - 1) / step + 1;
294 Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step,
297 if (PySlice_Unpack(_r, start, stop, step) < 0)
299 *slicelength = PySlice_AdjustIndices(length, start, stop, *step);
306 PyObject *start, *stop, *step;
308 start = stop = step = NULL;
313 if (!PyArg_UnpackTuple(args, "slice", 1, 3, &start, &stop, &step))
322 return PySlice_New(start, stop, step);
327 slice(start, stop[, step])\n\
336 Py_DECREF(r->step);
350 return PyUnicode_FromFormat("slice(%R, %R, %R)", r->start, r->stop, r->step);
356 {"step", T_OBJECT, offsetof(PySliceObject, step), READONLY},
386 PyObject *start=NULL, *stop=NULL, *step=NULL;
390 /* Convert step to an integer; raise for zero step. */
391 if (self->step == Py_None) {
392 step = _PyLong_GetOne();
393 Py_INCREF(step);
398 step = evaluate_slice_index(self->step);
399 if (step == NULL)
401 step_sign = _PyLong_Sign(step);
404 "slice step cannot be zero");
507 *step_ptr = step;
516 Py_XDECREF(step);
527 PyObject *start, *stop, *step;
543 error = _PySlice_GetLongIndices(self, length, &start, &stop, &step);
548 return Py_BuildValue("(NNN)", start, stop, step);
562 return Py_BuildValue("O(OOO)", Py_TYPE(self), self->start, self->stop, self->step);
603 ((PySliceObject *)v)->step);
611 ((PySliceObject *)w)->step);
628 Py_VISIT(v->step);