Add G_IN_SET, patch our internal users via spatch

I originally tried to get this into GLib:
https://bugzilla.gnome.org/show_bug.cgi?id=783751

But that looks like it's going to fail due to MSVC. Let's add it here at least
so I can start using it tomorrow and not wait for the MSVC team to catch up.

I renamed `glnx-alloca.h` to `glnx-macros.h` as a more natural collective
home for things from systemd's `macro.h`.

Finally, I used a Coccinelle spatch similar to the one referenced
in the above BZ to patch our uses.

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/test-libglnx-macros.c b/tests/test-libglnx-macros.c
new file mode 100644
index 0000000..d16c100
--- /dev/null
+++ b/tests/test-libglnx-macros.c
@@ -0,0 +1,48 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "libglnx.h"
+#include <glib.h>
+#include <stdlib.h>
+#include <gio/gio.h>
+#include <string.h>
+
+static void
+test_inset (void)
+{
+  g_assert (G_IN_SET (7, 7));
+  g_assert (G_IN_SET (7, 42, 7));
+  g_assert (G_IN_SET (7, 7,42,3,9));
+  g_assert (G_IN_SET (42, 7,42,3,9));
+  g_assert (G_IN_SET (3, 7,42,3,9));
+  g_assert (G_IN_SET (9, 7,42,3,9));
+  g_assert (!G_IN_SET (8, 7,42,3,9));
+  g_assert (!G_IN_SET (-1, 7,42,3,9));
+  g_assert (G_IN_SET ('x', 'a', 'x', 'c'));
+  g_assert (!G_IN_SET ('y', 'a', 'x', 'c'))
+}
+
+int main (int argc, char **argv)
+{
+  g_test_init (&argc, &argv, NULL);
+  g_test_add_func ("/inset", test_inset);
+  return g_test_run();
+}