* Boston, MA 02111-1307, USA.
*/
-/* collect a single argument value from a va_list
+/*
+ * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
-static inline gchar*
-gtk_arg_collect_value (GtkType fundamental_type,
- GtkArg *arg,
- va_list *var_args)
-{
- gchar *error_msg;
- error_msg = NULL;
- switch (fundamental_type)
- {
- case GTK_TYPE_INVALID:
- error_msg = g_strdup ("invalid untyped argument");
- break;
- case GTK_TYPE_NONE:
- error_msg = g_strdup ("invalid argument type `void'");
- break;
- case GTK_TYPE_CHAR:
- GTK_VALUE_CHAR (*arg) = va_arg (*var_args, gchar);
- break;
- case GTK_TYPE_BOOL:
- GTK_VALUE_BOOL (*arg) = va_arg (*var_args, gboolean);
- break;
- case GTK_TYPE_INT:
- GTK_VALUE_INT (*arg) = va_arg (*var_args, gint);
- break;
- case GTK_TYPE_UINT:
- GTK_VALUE_UINT (*arg) = va_arg (*var_args, guint);
- break;
- case GTK_TYPE_ENUM:
- GTK_VALUE_ENUM (*arg) = va_arg (*var_args, gint);
- break;
- case GTK_TYPE_FLAGS:
- GTK_VALUE_FLAGS (*arg) = va_arg (*var_args, gint);
- break;
- case GTK_TYPE_LONG:
- GTK_VALUE_LONG (*arg) = va_arg (*var_args, glong);
- break;
- case GTK_TYPE_ULONG:
- GTK_VALUE_ULONG (*arg) = va_arg (*var_args, gulong);
- break;
- case GTK_TYPE_FLOAT:
- GTK_VALUE_FLOAT (*arg) = va_arg (*var_args, gfloat);
- break;
- case GTK_TYPE_DOUBLE:
- GTK_VALUE_DOUBLE (*arg) = va_arg (*var_args, gdouble);
- break;
- case GTK_TYPE_STRING:
- GTK_VALUE_STRING (*arg) = va_arg (*var_args, gchar*);
- break;
- case GTK_TYPE_POINTER:
- GTK_VALUE_POINTER (*arg) = va_arg (*var_args, gpointer);
- break;
- case GTK_TYPE_BOXED:
- GTK_VALUE_BOXED (*arg) = va_arg (*var_args, gpointer);
- break;
- case GTK_TYPE_SIGNAL:
- GTK_VALUE_SIGNAL (*arg).f = va_arg (*var_args, GtkFunction);
- GTK_VALUE_SIGNAL (*arg).d = va_arg (*var_args, gpointer);
- break;
- case GTK_TYPE_FOREIGN:
- GTK_VALUE_FOREIGN (*arg).data = va_arg (*var_args, gpointer);
- GTK_VALUE_FOREIGN (*arg).notify = va_arg (*var_args, GtkDestroyNotify);
- break;
- case GTK_TYPE_CALLBACK:
- GTK_VALUE_CALLBACK (*arg).marshal = va_arg (*var_args, GtkCallbackMarshal);
- GTK_VALUE_CALLBACK (*arg).data = va_arg (*var_args, gpointer);
- GTK_VALUE_CALLBACK (*arg).notify = va_arg (*var_args, GtkDestroyNotify);
- break;
- case GTK_TYPE_C_CALLBACK:
- GTK_VALUE_C_CALLBACK (*arg).func = va_arg (*var_args, GtkFunction);
- GTK_VALUE_C_CALLBACK (*arg).func_data = va_arg (*var_args, gpointer);
- break;
- case GTK_TYPE_ARGS:
- GTK_VALUE_ARGS (*arg).n_args = va_arg (*var_args, gint);
- GTK_VALUE_ARGS (*arg).args = va_arg (*var_args, GtkArg*);
- break;
- case GTK_TYPE_OBJECT:
- GTK_VALUE_OBJECT (*arg) = va_arg (*var_args, GtkObject*);
- if (GTK_VALUE_OBJECT (*arg) != NULL)
- {
- register GtkObject *object = GTK_VALUE_OBJECT (*arg);
-
- if (object->klass == NULL ||
- !gtk_type_is_a (GTK_OBJECT_TYPE (object), arg->type))
- error_msg = g_strconcat ("invalid object `",
- gtk_type_name (GTK_OBJECT_TYPE (object)),
- "' for argument type `",
- gtk_type_name (arg->type),
- "'",
- NULL);
- }
- break;
- default:
- error_msg = g_strconcat ("unsupported argument type `",
- gtk_type_name (arg->type),
- "'",
- NULL);
- break;
- }
-
- return error_msg;
-}
+/* collect a single argument value from a va_list.
+ * this is implemented as a huge macro <shrug>, because we can't
+ * pass va_list variables by reference on some systems.
+ * the corresponding prototype would be:
+ * static inline gchar*
+ * gtk_arg_collect_value (GtkArg *arg,
+ * va_list var_args);
+ */
+#define GTK_ARG_COLLECT_VALUE(arg, var_args, _error) \
+G_STMT_START { \
+ gchar *error_msg; \
+ GtkType fundamental_type; \
+ \
+ fundamental_type = GTK_FUNDAMENTAL_TYPE (arg->type); \
+ if (fundamental_type > GTK_TYPE_FUNDAMENTAL_LAST) \
+ { \
+ fundamental_type = gtk_type_get_varargs_type (fundamental_type); \
+ if (!fundamental_type) \
+ fundamental_type = GTK_FUNDAMENTAL_TYPE (arg->type); \
+ } \
+ \
+ error_msg = NULL; \
+ switch (fundamental_type) \
+ { \
+ case GTK_TYPE_INVALID: \
+ error_msg = g_strdup ("invalid untyped argument"); \
+ break; \
+ \
+ case GTK_TYPE_NONE: \
+ /* we just ignore this type, since it arithmetically just requires \
+ * us to not move the var_args pointer any further. callers need to \
+ * check for the validity of GTK_TYPE_NONE themselves. \
+ * \
+ * error_msg = g_strdup ("invalid argument type `void'"); \
+ */ \
+ break; \
+ \
+ /* everything smaller than an int is guarranteed to be \
+ * passed as an int \
+ */ \
+ case GTK_TYPE_CHAR: \
+ GTK_VALUE_CHAR (*arg) = va_arg (var_args, gint); \
+ break; \
+ case GTK_TYPE_UCHAR: \
+ GTK_VALUE_UCHAR (*arg) = va_arg (var_args, guint); \
+ break; \
+ case GTK_TYPE_BOOL: \
+ GTK_VALUE_BOOL (*arg) = va_arg (var_args, gint); \
+ break; \
+ case GTK_TYPE_INT: \
+ GTK_VALUE_INT (*arg) = va_arg (var_args, gint); \
+ break; \
+ case GTK_TYPE_UINT: \
+ GTK_VALUE_UINT (*arg) = va_arg (var_args, guint); \
+ break; \
+ case GTK_TYPE_ENUM: \
+ GTK_VALUE_ENUM (*arg) = va_arg (var_args, gint); \
+ break; \
+ case GTK_TYPE_FLAGS: \
+ GTK_VALUE_FLAGS (*arg) = va_arg (var_args, guint); \
+ break; \
+ \
+ /* we collect longs as glongs since they differ in size with \
+ * integers on some platforms \
+ */ \
+ case GTK_TYPE_LONG: \
+ GTK_VALUE_LONG (*arg) = va_arg (var_args, glong); \
+ break; \
+ case GTK_TYPE_ULONG: \
+ GTK_VALUE_ULONG (*arg) = va_arg (var_args, gulong); \
+ break; \
+ \
+ /* floats are always passed as doubles \
+ */ \
+ case GTK_TYPE_FLOAT: \
+ /* GTK_VALUE_FLOAT (*arg) = va_arg (var_args, gfloat); */ \
+ GTK_VALUE_FLOAT (*arg) = va_arg (var_args, gdouble); \
+ break; \
+ case GTK_TYPE_DOUBLE: \
+ GTK_VALUE_DOUBLE (*arg) = va_arg (var_args, gdouble); \
+ break; \
+ \
+ /* collect pointer values \
+ */ \
+ case GTK_TYPE_STRING: \
+ GTK_VALUE_STRING (*arg) = va_arg (var_args, gchar*); \
+ break; \
+ case GTK_TYPE_POINTER: \
+ GTK_VALUE_POINTER (*arg) = va_arg (var_args, gpointer); \
+ break; \
+ case GTK_TYPE_BOXED: \
+ GTK_VALUE_BOXED (*arg) = va_arg (var_args, gpointer); \
+ break; \
+ \
+ /* structured types \
+ */ \
+ case GTK_TYPE_SIGNAL: \
+ GTK_VALUE_SIGNAL (*arg).f = va_arg (var_args, GtkSignalFunc); \
+ GTK_VALUE_SIGNAL (*arg).d = va_arg (var_args, gpointer); \
+ break; \
+ case GTK_TYPE_ARGS: \
+ GTK_VALUE_ARGS (*arg).n_args = va_arg (var_args, gint); \
+ GTK_VALUE_ARGS (*arg).args = va_arg (var_args, GtkArg*); \
+ break; \
+ case GTK_TYPE_FOREIGN: \
+ GTK_VALUE_FOREIGN (*arg).data = va_arg (var_args, gpointer); \
+ GTK_VALUE_FOREIGN (*arg).notify = va_arg (var_args, GtkDestroyNotify); \
+ break; \
+ case GTK_TYPE_CALLBACK: \
+ GTK_VALUE_CALLBACK (*arg).marshal = va_arg (var_args, GtkCallbackMarshal); \
+ GTK_VALUE_CALLBACK (*arg).data = va_arg (var_args, gpointer); \
+ GTK_VALUE_CALLBACK (*arg).notify = va_arg (var_args, GtkDestroyNotify); \
+ break; \
+ case GTK_TYPE_C_CALLBACK: \
+ GTK_VALUE_C_CALLBACK (*arg).func = va_arg (var_args, GtkFunction); \
+ GTK_VALUE_C_CALLBACK (*arg).func_data = va_arg (var_args, gpointer); \
+ break; \
+ \
+ /* we do some extra sanity checking when collecting objects, \
+ * i.e. if the object pointer is not NULL, we check whether we \
+ * actually got an object pointer within the desired class branch. \
+ */ \
+ case GTK_TYPE_OBJECT: \
+ GTK_VALUE_OBJECT (*arg) = va_arg (var_args, GtkObject*); \
+ if (GTK_VALUE_OBJECT (*arg) != NULL) \
+ { \
+ register GtkObject *object = GTK_VALUE_OBJECT (*arg); \
+ \
+ if (object->klass == NULL) \
+ error_msg = g_strconcat ("invalid unclassed object pointer for argument type `", \
+ gtk_type_name (arg->type), \
+ "'", \
+ NULL); \
+ else if (!gtk_type_is_a (GTK_OBJECT_TYPE (object), arg->type)) \
+ error_msg = g_strconcat ("invalid object `", \
+ gtk_type_name (GTK_OBJECT_TYPE (object)), \
+ "' for argument type `", \
+ gtk_type_name (arg->type), \
+ "'", \
+ NULL); \
+ } \
+ break; \
+ \
+ default: \
+ error_msg = g_strconcat ("unsupported argument type `", \
+ gtk_type_name (arg->type), \
+ "'", \
+ NULL); \
+ break; \
+ } \
+ \
+ _error = error_msg; /* return error_msg; */ \
+} G_STMT_END
projects / ~andy / gtk / blobdiff