1 files changed, 148 insertions, 0 deletions
diff --git a/gi/pygi-foreign.c b/gi/pygi-foreign.c
new file mode 100644
index 0000000..13a0f77
--- /dev/null
+++ b/gi/pygi-foreign.c
@@ -0,0 +1,148 @@
+/* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
+/*
+ * Copyright (c) 2010  litl, LLC
+ * Copyright (c) 2010  Collabora Ltd. <http://www.collabora.co.uk/>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "pygi-foreign.h"
+
+#include <config.h>
+#include <girepository.h>
+
+typedef struct {
+    const char *namespace;
+    const char *name;
+    PyGIArgOverrideToGArgumentFunc to_func;
+    PyGIArgOverrideFromGArgumentFunc from_func;
+    PyGIArgOverrideReleaseGArgumentFunc release_func;
+} PyGIForeignStruct;
+
+static GPtrArray *foreign_structs = NULL;
+
+static PyGIForeignStruct *
+pygi_struct_foreign_lookup (GITypeInfo *type_info)
+{
+    gint i;
+    PyObject *module;
+    gchar *module_name;
+    GIBaseInfo *base_info;
+    const gchar *namespace;
+    const gchar *name;
+
+    base_info = g_type_info_get_interface (type_info);
+    if (base_info == NULL) {
+        PyErr_Format (PyExc_ValueError, "Couldn't resolve the type of this foreign struct");
+        return NULL;
+    }
+
+    namespace = g_base_info_get_namespace (base_info);
+    name = g_base_info_get_name (base_info);
+
+    module_name = g_strconcat ("gi._gi_", g_base_info_get_namespace (base_info), NULL);
+    module = PyImport_ImportModule (module_name);
+    g_free (module_name);
+
+    if (foreign_structs != NULL) {
+        for (i = 0; i < foreign_structs->len; i++) {
+            PyGIForeignStruct *foreign_struct = \
+                    g_ptr_array_index (foreign_structs, i);
+
+            if ( (strcmp (namespace, foreign_struct->namespace) == 0) &&
+                    (strcmp (name, foreign_struct->name) == 0)) {
+                g_base_info_unref (base_info);
+                return foreign_struct;
+            }
+        }
+    }
+
+    g_base_info_unref (base_info);
+
+    PyErr_Format (PyExc_TypeError, "Couldn't find conversion for foreign struct '%s.%s'", namespace, name);
+    return NULL;
+}
+
+PyObject *
+pygi_struct_foreign_convert_to_g_argument (PyObject      *value,
+                                           GITypeInfo     *type_info,
+                                           GITransfer      transfer,
+                                           GArgument      *arg)
+{
+    PyGIForeignStruct *foreign_struct = pygi_struct_foreign_lookup (type_info);
+
+    if (foreign_struct == NULL)
+        return NULL;
+
+    if (!foreign_struct->to_func (value, type_info, transfer, arg))
+        return NULL;
+
+    Py_RETURN_NONE;
+}
+
+PyObject *
+pygi_struct_foreign_convert_from_g_argument (GITypeInfo *type_info,
+                                             GArgument  *arg)
+{
+    PyGIForeignStruct *foreign_struct = pygi_struct_foreign_lookup (type_info);
+
+    if (foreign_struct == NULL)
+        return NULL;
+
+    return foreign_struct->from_func (type_info, arg);
+}
+
+PyObject *
+pygi_struct_foreign_release_g_argument (GITransfer  transfer,
+                                        GITypeInfo *type_info,
+                                        GArgument  *arg)
+{
+    PyGIForeignStruct *foreign_struct = pygi_struct_foreign_lookup (type_info);
+
+    if (foreign_struct == NULL)
+        return NULL;
+
+    if (!foreign_struct->release_func)
+        Py_RETURN_NONE;
+
+    if (!foreign_struct->release_func (transfer, type_info, arg))
+        return NULL;
+
+    Py_RETURN_NONE;
+}
+
+void
+pygi_register_foreign_struct_real (const char* namespace_,
+                                   const char* name,
+                                   PyGIArgOverrideToGArgumentFunc to_func,
+                                   PyGIArgOverrideFromGArgumentFunc from_func,
+                                   PyGIArgOverrideReleaseGArgumentFunc release_func)
+{
+    PyGIForeignStruct *new_struct = g_slice_new0 (PyGIForeignStruct);
+    new_struct->namespace = namespace_;
+    new_struct->name = name;
+    new_struct->to_func = to_func;
+    new_struct->from_func = from_func;
+    new_struct->release_func = release_func;
+
+    if (foreign_structs == NULL)
+        foreign_structs = g_ptr_array_new ();
+
+    g_ptr_array_add (foreign_structs, new_struct);
+}