--- /dev/null
+/*
+ * msgcode-test.c: check that the new message encoding is correct
+ */
+/*
+ * This file is Free Software. It was originally written for secnet.
+ *
+ * Copyright 2017 Mark Wooding
+ *
+ * You may redistribute secnet as a whole and/or modify it under the
+ * terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3, or (at your option) any
+ * later version.
+ *
+ * You may redistribute this file and/or modify it under the terms of
+ * the GNU General Public License as published by the Free Software
+ * Foundation; either version 2, or (at your option) any later
+ * version.
+ *
+ * This software 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, see
+ * https://www.gnu.org/licenses/gpl.html.
+ */
+
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "magic.h"
+
+#define OLD_LABEL_NAK 0x00000000
+#define OLD_LABEL_MSG0 0x00020200
+#define OLD_LABEL_MSG1 0x01010101
+#define OLD_LABEL_MSG2 0x02020202
+#define OLD_LABEL_MSG3 0x03030303
+#define OLD_LABEL_MSG3BIS 0x13030313
+#define OLD_LABEL_MSG4 0x04040404
+#define OLD_LABEL_MSG5 0x05050505
+#define OLD_LABEL_MSG6 0x06060606
+#define OLD_LABEL_MSG7 0x07070707
+#define OLD_LABEL_MSG8 0x08080808
+#define OLD_LABEL_MSG9 0x09090909
+#define OLD_LABEL_PROD 0x0a0a0a0a
+
+static void check_labels(const char *what, uint32_t new, uint32_t old)
+{
+ if (old != new) {
+ printf("mismatch for %s: %08"PRIx32" (new) /= %08"PRIx32" (old)\n",
+ what, new, old);
+ exit(2);
+ }
+}
+
+int main(void)
+{
+ unsigned i, j;
+ uint32_t m, r, s;
+
+#define CHECK(label) check_labels(#label, LABEL_##label, OLD_LABEL_##label)
+ CHECK(NAK);
+ CHECK(MSG0);
+ CHECK(MSG1);
+ CHECK(MSG2);
+ CHECK(MSG3);
+ CHECK(MSG3BIS);
+ CHECK(MSG4);
+ CHECK(MSG5);
+ CHECK(MSG6);
+ CHECK(MSG7);
+ CHECK(MSG8);
+ CHECK(MSG9);
+ CHECK(PROD);
+#undef CHECK
+ for (i = 0; i < 65536; i++) {
+ for (j = 0; j < 65536; j++) {
+ m = MSGCODE(i, j);
+ r = MSGMAJOR(m); s = MSGMINOR(m);
+ if (r != i || s != j) {
+ printf("roundtrip fail: %04x %04x -> %08"PRIx32" "
+ "-> %08"PRIx32" %08"PRIx32"\n",
+ i, j, m, r, s);
+ exit(2);
+ }
+ }
+ }
+
+ return (0);
+}