base: ARRAY_NELEM() macro for static arrays

diff --git a/usual/base.h b/usual/base.h
index 590786e747e97bc2db473714f595c047a05d6912..247dcf983f5df0a8c9a41c21b319fcd232afedca 100644 (file)
--- a/usual/base.h
+++ b/usual/base.h
@@ -60,6 +60,9 @@
 #define ALIGN(x)  CUSTOM_ALIGN(x, sizeof(long))
 #endif
 
+/* number of elements in array */
+#define ARRAY_NELEM(a) (sizeof(a) / sizeof((a)[0]))
+
 #define _PACKED                        __attribute__((packed))
 
 /*