diff options
Diffstat (limited to 'Objects')
| -rw-r--r-- | Objects/sliceobject.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/Objects/sliceobject.c b/Objects/sliceobject.c index a43644d..f2d84da 100644 --- a/Objects/sliceobject.c +++ b/Objects/sliceobject.c @@ -221,6 +221,39 @@ static PyMemberDef slice_members[] = { {0} }; +static PyObject* +slice_indices(PySliceObject* self, PyObject* len) +{ + int ilen, start, stop, step, slicelength; + + ilen = PyInt_AsLong(len); + + if (ilen == -1 && PyErr_Occurred()) { + return NULL; + } + + if (PySlice_GetIndicesEx(self, ilen, &start, &stop, + &step, &slicelength) < 0) { + return NULL; + } + + return Py_BuildValue("(lll)", start, stop, step); +} + +PyDoc_STRVAR(slice_indices_doc, +"S.indices(len) -> (start, stop, stride)\n\ +\n\ +Assuming a sequence of length len, calculate the start and stop\n\ +indices, and the stride length of the extended slice described by\n\ +S. Out of bounds indices are clipped in a manner consistent with the\n\ +handling of normal slices."); + +static PyMethodDef slice_methods[] = { + {"indices", (PyCFuntion)slice_indices, + METH_O, slice_indices_doc}, + {NULL, NULL} +}; + static int slice_compare(PySliceObject *v, PySliceObject *w) { @@ -271,7 +304,7 @@ PyTypeObject PySlice_Type = { 0, /* tp_weaklistoffset */ 0, /* tp_iter */ 0, /* tp_iternext */ - 0, /* tp_methods */ + slice_methods, /* tp_methods */ slice_members, /* tp_members */ 0, /* tp_getset */ 0, /* tp_base */ |