+/*
+ * Utility macro used to register backends
+ *
+ * use: EV_BACKEND_REGISTER_WITH_CODE(BackendName, backend_name, CODE)
+ */
+#define EV_BACKEND_REGISTER_WITH_CODE(BackendName, backend_name, CODE) \
+ \
+static GType g_define_type_id = 0; \
+ \
+GType \
+backend_name##_get_type (void) \
+{ \
+ return g_define_type_id; \
+} \
+ \
+static void backend_name##_init (BackendName *self); \
+static void backend_name##_class_init (BackendName##Class *klass); \
+static gpointer backend_name##_parent_class = NULL; \
+static void backend_name##_class_intern_init (gpointer klass) \
+{ \
+ backend_name##_parent_class = g_type_class_peek_parent (klass); \
+ backend_name##_class_init ((BackendName##Class *) klass); \
+} \
+ \
+G_MODULE_EXPORT GType \
+register_evince_backend (GTypeModule *module) \
+{ \
+ const GTypeInfo our_info = { \
+ sizeof (BackendName##Class), \
+ NULL, /* base_init */ \
+ NULL, /* base_finalize */ \
+ (GClassInitFunc) backend_name##_class_intern_init, \
+ NULL, \
+ NULL, /* class_data */ \
+ sizeof (BackendName), \
+ 0, /* n_preallocs */ \
+ (GInstanceInitFunc) backend_name##_init \
+ }; \
+ \
+ /* Initialise the i18n stuff */ \
+ bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR); \
+ bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); \
+ \
+ g_define_type_id = g_type_module_register_type (module, \
+ EV_TYPE_DOCUMENT, \
+ #BackendName, \
+ &our_info, \
+ (GTypeFlags)0); \
+ \
+ CODE \
+ \
+ return g_define_type_id; \
+}
+
+/*
+ * Utility macro used to register backend
+ *
+ * use: EV_BACKEND_REGISTER(BackendName, backend_name)
+ */
+#define EV_BACKEND_REGISTER(BackendName, backend_name) \
+ EV_BACKEND_REGISTER_WITH_CODE(BackendName, backend_name, ;)
+
+/*
+ * A convenience macro for boxed type implementations, which defines a
+ * type_name_get_type() function registering the boxed type.
+ */
+#define EV_DEFINE_BOXED_TYPE(TypeName, type_name, copy_func, free_func) \
+GType \
+type_name##_get_type (void) \
+{ \
+ static volatile gsize g_define_type_id__volatile = 0; \
+ if (g_once_init_enter (&g_define_type_id__volatile)) { \
+ GType g_define_type_id = \
+ g_boxed_type_register_static (g_intern_static_string (#TypeName), \
+ (GBoxedCopyFunc) copy_func, \
+ (GBoxedFreeFunc) free_func); \
+ g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
+ } \
+ return g_define_type_id__volatile; \
+}
+
+/* A convenience macro for GTypeInterface definitions, which declares
+ * a default vtable initialization function and defines a *_get_type()
+ * function.
+ *
+ * The macro expects the interface initialization function to have the
+ * name <literal>t_n ## _default_init</literal>, and the interface
+ * structure to have the name <literal>TN ## Interface</literal>.
+ */
+#define EV_DEFINE_INTERFACE(TypeName, type_name, TYPE_PREREQ) \
+static void type_name##_class_init (TypeName##Iface *klass); \
+ \
+GType \
+type_name##_get_type (void) \
+{ \
+ static volatile gsize g_define_type_id__volatile = 0; \
+ if (g_once_init_enter (&g_define_type_id__volatile)) { \
+ GType g_define_type_id = \
+ g_type_register_static_simple (G_TYPE_INTERFACE, \
+ g_intern_static_string (#TypeName), \
+ sizeof (TypeName##Iface), \
+ (GClassInitFunc)type_name##_class_init, \
+ 0, \
+ (GInstanceInitFunc)NULL, \
+ (GTypeFlags) 0); \
+ if (TYPE_PREREQ) \
+ g_type_interface_add_prerequisite (g_define_type_id, TYPE_PREREQ); \
+ g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
+ } \
+ return g_define_type_id__volatile; \
+}
+
+/*
+ * A convenience macro for boxed type implementations, which defines a
+ * type_name_get_type() function registering the boxed type.
+ */
+#define EV_DEFINE_BOXED_TYPE(TypeName, type_name, copy_func, free_func) \
+GType \
+type_name##_get_type (void) \
+{ \
+ static volatile gsize g_define_type_id__volatile = 0; \
+ if (g_once_init_enter (&g_define_type_id__volatile)) { \
+ GType g_define_type_id = \
+ g_boxed_type_register_static (g_intern_static_string (#TypeName), \
+ (GBoxedCopyFunc) copy_func, \
+ (GBoxedFreeFunc) free_func); \
+ g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
+ } \
+ return g_define_type_id__volatile; \
+}
+