1 files changed, 4 insertions, 1 deletions
diff --git a/tmux.h b/tmux.h
index 11294f38..7adf228c 100644
--- a/tmux.h
+++ b/tmux.h
@@ -1,4 +1,4 @@
-/* $Id: tmux.h,v 1.208 2009-01-07 19:53:17 nicm Exp $ */
+/* $Id: tmux.h,v 1.209 2009-01-07 22:52:33 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -135,6 +135,9 @@ extern const char    *__progname;
 #define printflike3 __attribute__ ((format (printf, 3, 4)))
 #define printflike4 __attribute__ ((format (printf, 4, 5)))
 
+/* Number of items in array. */
+#define nitems(_a)  (sizeof((_a)) / sizeof((_a)[0]))
+
 /* Buffer macros. */
 #define BUFFER_USED(b) ((b)->size)
 #define BUFFER_FREE(b) ((b)->space - (b)->off - (b)->size)