1 files changed, 76 insertions, 0 deletions
diff --git a/source3/param/pyparam_util.c b/source3/param/pyparam_util.c
new file mode 100644
index 0000000..67ab494
--- /dev/null
+++ b/source3/param/pyparam_util.c
@@ -0,0 +1,76 @@
+/*
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright (C) David Mulder <dmulder@samba.org> 2021
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <Python.h>
+#include "includes.h"
+#include "param/param.h"
+#include "param/pyparam.h"
+#include "param/loadparm.h"
+#include "param/s3_param.h"
+#include <pytalloc.h>
+
+#define PyErr_FromString(str) Py_BuildValue("(s)", discard_const_p(char, str))
+#define PyLoadparmContext_AsLoadparmContext(obj) pytalloc_get_type(obj, struct loadparm_context)
+
+_PUBLIC_ struct loadparm_context *lpcfg_from_py_object(TALLOC_CTX *mem_ctx, PyObject *py_obj)
+{
+	PyObject *param_mod;
+	PyTypeObject *lp_type;
+	bool is_lpobj;
+	const struct loadparm_s3_helpers *s3_context;
+	struct loadparm_context *s4_context;
+
+	if (py_obj == Py_None) {
+		s3_context = loadparm_s3_helpers();
+
+		s4_context = loadparm_init_s3(mem_ctx, s3_context);
+		if (s4_context == NULL) {
+			PyErr_NoMemory();
+			return NULL;
+		}
+
+		if (!lpcfg_load_default(s4_context)) {
+			PyErr_FromString("Failed to load defaults\n");
+			return NULL;
+		}
+
+		return s4_context;
+	}
+
+	param_mod = PyImport_ImportModule("samba.param");
+	if (param_mod == NULL) {
+		return NULL;
+	}
+
+	lp_type = (PyTypeObject *)PyObject_GetAttrString(param_mod, "LoadParm");
+	Py_DECREF(param_mod);
+	if (lp_type == NULL) {
+		PyErr_SetString(PyExc_RuntimeError, "Unable to import LoadParm");
+		return NULL;
+	}
+
+	is_lpobj = PyObject_TypeCheck(py_obj, lp_type);
+	Py_DECREF(lp_type);
+	if (is_lpobj) {
+		return talloc_reference(mem_ctx, PyLoadparmContext_AsLoadparmContext(py_obj));
+	}
+
+	PyErr_SetNone(PyExc_TypeError);
+	return NULL;
+}