Issue #27810: Add _PyCFunction_FastCallKeywords()

Use _PyCFunction_FastCallKeywords() in ceval.c: it allows to remove a lot of
code from ceval.c which was only used to call C functions.

1 files changed, 26 insertions, 0 deletions

diff --git a/Objects/methodobject.c b/Objects/methodobject.c
index 394f1f4502..0fe3315417 100644
--- a/Objects/methodobject.c
+++ b/Objects/methodobject.c
@@ -155,6 +155,7 @@ _PyCFunction_FastCallDict(PyObject *func_obj, PyObject **args, Py_ssize_t nargs,
     PyObject *result;
     int flags;
 
+    assert(PyCFunction_Check(func));
     assert(func != NULL);
     assert(nargs >= 0);
     assert(nargs == 0 || args != NULL);
@@ -243,6 +244,31 @@ _PyCFunction_FastCallDict(PyObject *func_obj, PyObject **args, Py_ssize_t nargs,
     return result;
 }
 
+PyObject *
+_PyCFunction_FastCallKeywords(PyObject *func, PyObject **stack,
+                              Py_ssize_t nargs, PyObject *kwnames)
+{
+    PyObject *kwdict, *result;
+    Py_ssize_t nkwargs;
+
+    assert(PyCFunction_Check(func));
+
+    nkwargs = (kwnames == NULL) ? 0 : PyTuple_GET_SIZE(kwnames);
+    if (nkwargs > 0) {
+        kwdict = _PyStack_AsDict(stack + nargs, nkwargs, kwnames, func);
+        if (kwdict == NULL) {
+            return NULL;
+        }
+    }
+    else {
+        kwdict = NULL;
+    }
+
+    result = _PyCFunction_FastCallDict(func, stack, nargs, kwdict);
+    Py_XDECREF(kwdict);
+    return result;
+}
+
 /* Methods (the standard built-in methods, that is) */
 
 static void