mhd_arr_num_elems: added new helper macro

src/mhd2/Makefile.am

@@ -33,7 +33,7 @@ libmicrohttpd2_la_SOURCES = \
   compat_calloc.h \
   sys_w32_ver.h \
   mhd_assert.h \
-  mhd_cntnr_ptr.h \
+  mhd_cntnr_ptr.h           mhd_arr_num_elems.h \
   mhd_tristate.h \
   mhd_socket_type.h         mhd_sockets_macros.h \
   mhd_sockets_funcs.c       mhd_sockets_funcs.h \

src/mhd2/http_status_str.c

@@ -32,6 +32,7 @@
 #include "sys_base_types.h"
 #include "mhd_public_api.h"
 #include "mhd_str_macros.h"
+#include "mhd_arr_num_elems.h"
 
 #define UNUSED_STATUS {0, NULL}
 
@@ -165,7 +166,7 @@ struct mhd_HttpStatusesBlock
   const struct MHD_String *const data;
 };
 
-#define STATUSES_BLOCK(m) { (sizeof(m) / sizeof(m[0])), m}
+#define STATUSES_BLOCK(m) { mhd_ARR_NUM_ELEMS (m), m}
 
 static const struct mhd_HttpStatusesBlock statuses[] = {
   STATUSES_BLOCK (invalid_hundred),

src/mhd2/mhd_arr_num_elems.h

@@ -0,0 +1,37 @@
+/*
+  This file is part of GNU libmicrohttpd
+  Copyright (C) 2024 Evgeny Grin (Karlson2k)
+
+  GNU libmicrohttpd is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  GNU libmicrohttpd is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
+
+/**
+ * @file src/mhd2/mhd_arr_num_elements.h
+ * @brief  The definition of mhd_ARR_NUM_ELEMS macro
+ * @author Karlson2k (Evgeny Grin)
+ */
+
+#ifndef MHD_ARR_NUM_ELEMS_H
+#define MHD_ARR_NUM_ELEMS_H 1
+
+#include "mhd_sys_options.h"
+
+/**
+ * Get the number of elements in the array
+ */
+#define mhd_ARR_NUM_ELEMS(arr) (sizeof(arr) / sizeof(arr[0]))
+
+#endif /* ! MHD_ARR_NUM_ELEMS_H */