Add a test for the RNG used for perfect hashing.

.gitignore

@@ -40,6 +40,10 @@ Makefile.in
 /src/tests/*.trs
 /src/test-suite.log
 
+/src/rnd_test
+/src/rnd_test.log
+/src/rnd_test.trs
+
 # Package build artifacts
 *.tar.gz
 *.rpm

src/Makefile.am

@@ -55,6 +55,14 @@ AM_VTC_LOG_FLAGS = -Dvmod_selector="$(VMOD_SELECTOR)"
 
 TESTS = @VMOD_TESTS@
 
+check_PROGRAMS = rnd_test
+
+rnd_test_SOURCES = rnd_test.c rnd.h
+
+rnd_test_CFLAGS = -Wall -Werror -Wextra -std=c99
+
+TESTS += rnd_test
+
 gcov: clean
 	$(AM_V_at)$(MAKE) $(AM_MAKEFLAGS) CC=gcc \
 		CFLAGS="${AM_CFLAGS} --coverage -fno-inline -g -O0" check

src/rnd_test.c

+/*-
+ * Copyright (c) 2020 UPLEX Nils Goroll Systemoptimierung
+ * All rights reserved
+ *
+ * Author: Geoffrey Simmons <geoffrey.simmons@uplex.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* Test the KISS99 implementation for Marsaglia's known answer. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+
+#include "rnd.h"
+
+#define MWC1 (12345)
+#define MWC2 (65435)
+#define JSR (34221)
+#define JCONG (12345)
+
+#define EXPECT (1372460312U)
+
+int
+main(int argc, char *argv[])
+{
+	uint32_t r, seed[4];
+
+	(void)argc;
+	(void)argv;
+
+	seed[0] = MWC1;
+	seed[1] = MWC2;
+	seed[2] = JSR;
+	seed[3] = JCONG;
+	rnd_init(seed);
+
+	for (int i = 0; i < 1000255; i++)
+		(void)rnd_nxt();
+	r = rnd_nxt();
+	if (r != EXPECT) {
+		fprintf(stderr, "got %" PRIu32 ",expected %" PRIu32 "\n",
+			r, EXPECT);
+		exit(EXIT_FAILURE);
+	}
+	exit(EXIT_SUCCESS);
+}