Add _PyStack_AsTupleSlice() helper
diff --git a/Include/abstract.h b/Include/abstract.h
index 3ca283a..d96e8a5 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -160,6 +160,12 @@
PyObject **stack,
Py_ssize_t nargs);
+PyAPI_FUNC(PyObject*) _PyStack_AsTupleSlice(
+ PyObject **stack,
+ Py_ssize_t nargs,
+ Py_ssize_t start,
+ Py_ssize_t end);
+
/* Convert keyword arguments from the (stack, kwnames) format to a Python
dictionary.
diff --git a/Objects/abstract.c b/Objects/abstract.c
index 5726160..bba946e 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -2274,7 +2274,30 @@
Py_INCREF(item);
PyTuple_SET_ITEM(args, i, item);
}
+ return args;
+}
+PyObject*
+_PyStack_AsTupleSlice(PyObject **stack, Py_ssize_t nargs,
+ Py_ssize_t start, Py_ssize_t end)
+{
+ PyObject *args;
+ Py_ssize_t i;
+
+ assert(0 <= start);
+ assert(end <= nargs);
+ assert(start <= end);
+
+ args = PyTuple_New(end - start);
+ if (args == NULL) {
+ return NULL;
+ }
+
+ for (i=start; i < end; i++) {
+ PyObject *item = stack[i];
+ Py_INCREF(item);
+ PyTuple_SET_ITEM(args, i - start, item);
+ }
return args;
}