gh-108494: Argument Clinic partial supports of Limited C API (#108495)

Argument Clinic now has a partial support of the
Limited API:

* Add --limited option to clinic.c.
* Add '_testclinic_limited' extension which is built with
  the limited C API version 3.13.
* For now, hardcode in clinic.py that "_testclinic_limited.c" targets
  the limited C API.

1 files changed, 53 insertions, 0 deletions

diff --git a/Modules/clinic/_testclinic_limited.c.h b/Modules/clinic/_testclinic_limited.c.h
new file mode 100644
index 0000000..730e967
--- /dev/null
+++ b/Modules/clinic/_testclinic_limited.c.h
@@ -0,0 +1,53 @@
+/*[clinic input]
+preserve
+[clinic start generated code]*/
+
+PyDoc_STRVAR(test_empty_function__doc__,
+"test_empty_function($module, /)\n"
+"--\n"
+"\n");
+
+#define TEST_EMPTY_FUNCTION_METHODDEF    \
+    {"test_empty_function", (PyCFunction)test_empty_function, METH_NOARGS, test_empty_function__doc__},
+
+static PyObject *
+test_empty_function_impl(PyObject *module);
+
+static PyObject *
+test_empty_function(PyObject *module, PyObject *Py_UNUSED(ignored))
+{
+    return test_empty_function_impl(module);
+}
+
+PyDoc_STRVAR(my_int_func__doc__,
+"my_int_func($module, arg, /)\n"
+"--\n"
+"\n");
+
+#define MY_INT_FUNC_METHODDEF    \
+    {"my_int_func", (PyCFunction)my_int_func, METH_O, my_int_func__doc__},
+
+static int
+my_int_func_impl(PyObject *module, int arg);
+
+static PyObject *
+my_int_func(PyObject *module, PyObject *arg_)
+{
+    PyObject *return_value = NULL;
+    int arg;
+    int _return_value;
+
+    arg = PyLong_AsInt(arg_);
+    if (arg == -1 && PyErr_Occurred()) {
+        goto exit;
+    }
+    _return_value = my_int_func_impl(module, arg);
+    if ((_return_value == -1) && PyErr_Occurred()) {
+        goto exit;
+    }
+    return_value = PyLong_FromLong((long)_return_value);
+
+exit:
+    return return_value;
+}
+/*[clinic end generated code: output=07e2e8ed6923cd16 input=a9049054013a1b77]*/