Issue #27867: Function PySlice_GetIndicesEx() is replaced with a macro if

Py_LIMITED_API is not set or set to the value between 0x03050400
and 0x03060000 (not including) or 0x03060100 or higher.

1 files changed, 14 insertions, 2 deletions

diff --git a/Include/sliceobject.h b/Include/sliceobject.h
index 26370e0..5359369 100644
--- a/Include/sliceobject.h
+++ b/Include/sliceobject.h
@@ -41,8 +41,20 @@ PyAPI_FUNC(int) _PySlice_GetLongIndices(PySliceObject *self, PyObject *length,
 PyAPI_FUNC(int) PySlice_GetIndices(PyObject *r, Py_ssize_t length,
                                   Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step);
 PyAPI_FUNC(int) PySlice_GetIndicesEx(PyObject *r, Py_ssize_t length,
-				    Py_ssize_t *start, Py_ssize_t *stop,
-				    Py_ssize_t *step, Py_ssize_t *slicelength);
+                                     Py_ssize_t *start, Py_ssize_t *stop,
+                                     Py_ssize_t *step, Py_ssize_t *slicelength);
+
+#if !defined(Py_LIMITED_API) || (Py_LIMITED_API+0 >= 0x03050400 && Py_LIMITED_API+0 < 0x03060000) || Py_LIMITED_API+0 >= 0x03060100
+#define PySlice_GetIndicesEx(slice, length, start, stop, step, slicelen) (  \
+    PySlice_Unpack((slice), (start), (stop), (step)) < 0 ? -1 :             \
+    ((*slicelen = PySlice_AdjustIndices((length), (start), (stop), *(step))), \
+     0))
+PyAPI_FUNC(int) PySlice_Unpack(PyObject *slice,
+                               Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step);
+PyAPI_FUNC(Py_ssize_t) PySlice_AdjustIndices(Py_ssize_t length,
+                                             Py_ssize_t *start, Py_ssize_t *stop,
+                                             Py_ssize_t step);
+#endif
 
 #ifdef __cplusplus
 }