# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1729629768 -7200
# Node ID 84a5fab8a47c468fec80e18cc43593c78f783a5c
# Parent  c26299cc9897f460c9b3c98d9a67ab574be2f308
add cx_nmemb() utility

diff -r c26299cc9897 -r 84a5fab8a47c CHANGELOG
--- a/CHANGELOG	Tue Oct 22 22:20:50 2024 +0200
+++ b/CHANGELOG	Tue Oct 22 22:42:48 2024 +0200
@@ -10,6 +10,7 @@
  * adds cx_sprintf() and several more variants
  * adds runtime constants to read out the actual SBO sizes
  * adds improved version of UCX 2 Test framework (now a self-contained header)
+ * adds cx_nmemb() utility function to common.h
  * the cx_compare_func symbol is now declared by compare.h
  * fixes wrong link from UCX 2 documentation to UCX 3 documentation
  * fixes critical bug that produced wrong results when comparing lists of different type but same size
diff -r c26299cc9897 -r 84a5fab8a47c src/cx/common.h
--- a/src/cx/common.h	Tue Oct 22 22:20:50 2024 +0200
+++ b/src/cx/common.h	Tue Oct 22 22:42:48 2024 +0200
@@ -117,6 +117,16 @@
         void *
 );
 
+/**
+ * Determines the number of members in a static C array.
+ *
+ * @attention never use this to determine the size of a dynamically allocated
+ * array.
+ *
+ * @param arr the array identifier
+ * @return the number of elements
+ */
+#define cx_nmemb(arr) (sizeof(arr)/sizeof((arr)[0]))
 
 // Compiler specific stuff