Add generic comparison functions.

t/Makefile.am

@@ -6,7 +6,7 @@ noinst_HEADERS = t.h
 
 # Common support code
 check_LTLIBRARIES = libt.la
-libt_la_SOURCES = t_main.c t_file.c t_const.c
+libt_la_SOURCES = t_main.c t_file.c t_util.c t_const.c
 
 # Link in the test driver and the full cryb library
 LDADD = $(builddir)/libt.la \

t/t.h

@@ -79,6 +79,12 @@ void t_frewind(struct t_file *);
 void t_fclose(struct t_file *);
 void t_fcloseall(void);
 
+/*
+ * Various utilities
+ */
+int t_compare_mem(const void *, const void *, size_t);
+int t_compare_str(const char *, const char *, size_t);
+
 /*
  * Useful constants
  */

t/t_util.c

@@ -0,0 +1,79 @@
+/*-
+ * Copyright (c) 2012-2014 Dag-Erling Smørgrav
+ * All rights reserved.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * 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 THE 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.
+ *
+ * Author: Dag-Erling Smørgrav <des@des.no>
+ *
+ * $Cryb$
+ */
+
+#include "cryb/impl.h"
+
+#include <err.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <unistd.h>
+
+#include "t.h"
+
+/*
+ * Compare two buffers, and print a verbose message if they differ.
+ */
+int
+t_compare_mem(const void *expected, const void *received, size_t len)
+{
+
+	if (memcmp(expected, received, len) != 0) {
+		t_verbose("expected ");
+		t_verbose_hex(expected, len);
+		t_verbose("\n");
+		t_verbose("received      ");
+		t_verbose_hex(received, len);
+		t_verbose("\n");
+		return (0);
+	}
+	return (1);
+}
+
+/*
+ * Compare two strings, and print a verbose message if they differ.
+ */
+int
+t_compare_str(const char *expected, const char *received)
+{
+
+	if (strcmp(expected, received, len) != 0) {
+		t_verbose("expected %s\n", expected);
+		t_verbose("received %s\n", received);
+		return (0);
+	}
+	return (1);
+}