memcmp-tests module (was: Re: rpl_memcmp on mingw with g++?)

[Simon Josefsson]

Simon Josefsson <address@hidden> writes:

> MinGW apparently needs gnulib's memcmp module

That was rather surprising to me, so I started investigating why that is
the case.  The first part of this was adding a self-test for memcmp.
I'm sure it can be improved to test more corner cases, but this is much
better than nothing.  Pushed.

/Simon

>From f57b1e96a2f83183073b34a05890aa4875708301 Mon Sep 17 00:00:00 2001
From: Simon Josefsson <address@hidden>
Date: Tue, 20 May 2008 09:22:45 +0200
Subject: [PATCH] Add memcmp-tests module.

---
 ChangeLog            |    5 ++++
 modules/memcmp-tests |   10 +++++++++
 tests/test-memcmp.c  |   52 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+), 0 deletions(-)
 create mode 100644 modules/memcmp-tests
 create mode 100644 tests/test-memcmp.c

diff --git a/ChangeLog b/ChangeLog
index 43d4986..f80ec3c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-05-20  Simon Josefsson  <address@hidden>
+
+       * modules/memcmp-tests: New file.
+       * tests/test-memcmp.c: New file.
+
 2008-05-19  Bruno Haible  <address@hidden>
 
        * modules/propername (Notice, configure.ac): Put quoted "..." into
diff --git a/modules/memcmp-tests b/modules/memcmp-tests
new file mode 100644
index 0000000..14edc38
--- /dev/null
+++ b/modules/memcmp-tests
@@ -0,0 +1,10 @@
+Files:
+tests/test-memcmp.c
+
+Depends-on:
+
+configure.ac:
+
+Makefile.am:
+TESTS += test-memcmp
+check_PROGRAMS += test-memcmp
diff --git a/tests/test-memcmp.c b/tests/test-memcmp.c
new file mode 100644
index 0000000..28c8fb0
--- /dev/null
+++ b/tests/test-memcmp.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2008 Free Software Foundation
+ * Written by Simon Josefsson
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <string.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define ASSERT(expr) \
+  do                                                                        \
+    {                                                                       \
+      if (!(expr))                                                          \
+       {                                                                    \
+         fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+         fflush (stderr);                                                   \
+         abort ();                                                          \
+       }                                                                    \
+    }                                                                       \
+  while (0)
+
+int
+main (void)
+{
+  char foo[] = "foo";
+  char foobar[] = "foobar";
+  char bar[] = "bar";
+
+  ASSERT (memcmp (NULL, NULL, 0) == 0);
+  ASSERT (memcmp (foo, foobar, 2) == 0);
+  ASSERT (memcmp (foo, foobar, 3) == 0);
+  ASSERT (memcmp (foo, foobar, 4) != 0);
+  ASSERT (memcmp (foo, bar, 1) != 0);
+  ASSERT (memcmp (foo, bar, 3) != 0);
+
+  return 0;
+}
-- 
1.5.5.1