X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/90edb255effd0d29d94e662ca5bf3e9eda7ed122..9322ba2854211794c27fae9468768b80b767c211:/h/mh.h

diff --git a/h/mh.h b/h/mh.h
index 55825da0..67b71702 100644
--- a/h/mh.h
+++ b/h/mh.h
@@ -43,6 +43,9 @@ typedef unsigned char  boolean;  /* not int so we can pack in a structure */
 #define NMH_UNUSED(i) i
 #endif
 
+/* DIM gives the number of elements in the one-dimensional array a. */
+#define DIM(a) (sizeof (a) / sizeof (*(a)))
+
 /* LEN gives the strlen() of string constant s, excluding the
  * terminating NUL. */
 #define LEN(s) (sizeof (s) - 1)