diff -r 8aea65ae1eaf -r 0d3c6075f82c src/cx/utils.h
--- a/src/cx/utils.h	Sat Apr 09 16:37:43 2022 +0200
+++ b/src/cx/utils.h	Sat Apr 09 18:02:53 2022 +0200
@@ -46,6 +46,8 @@
 extern "C" {
 #endif
 
+#define cx_for_n(varname, n) for (size_t varname = 0 ; (varname) < (n) ; (varname)++)
+
 /* ----------------------
  * cx_szmul() definition.
  * ---------------------- */