Add nitems(), a macro for determining the number of elements in a

statically-allocated array. Obtained from: OpenBSD (in principle) MFC after: 3 days
2012-06-02 19:30:49 +00:00 · 2012-06-02 19:30:49 +00:00 · f77bb430b9
commit f77bb430b9
parent e32a51888c
1 changed files with 1 additions and 0 deletions
--- a/sys/sys/param.h
+++ b/sys/sys/param.h
@ -273,6 +273,7 @@
 #ifndef howmany
 #define	howmany(x, y)	(((x)+((y)-1))/(y))
 #endif
+#define	nitems(x)	(sizeof((x)) / sizeof((x)[0]))
 #define	rounddown(x, y)	(((x)/(y))*(y))
 #define	roundup(x, y)	((((x)+((y)-1))/(y))*(y))  /* to any y */
 #define	roundup2(x, y)	(((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */