Add macros for common list counting without traversing the list.

12 years ago · c059bdcf8c
1 changed files with 4 additions and 0 deletions
--- a/common/panel-private.h
+++ b/common/panel-private.h
@ -37,4 +37,8 @@
 /* xfconf property base (printf format) */
 #define PANEL_PLUGIN_PROPERTY_BASE "/plugins/plugin-%d"

+/* quick GList and GSList counting without traversing */
+#define LIST_HAS_ONE_ENTRY(l)           ((l) != NULL && (l)->next == NULL)
+#define LIST_HAS_TWO_OR_MORE_ENTRIES(l) ((l) != NULL && (l)->next != NULL)
+
 #endif /* !__PANEL_PRIVATE_H__ */