Rename wsutil/floor.[ch] to wsutil/floorl.[ch].

That better indicates what they do - they don't supply floor(), as
that's a standard math.h feature dating back before C89, they supply
floorl().

Change-Id: Ib1278c51cdfc57680c28c51de87eafb2cb50c8eb
Reviewed-on: https://code.wireshark.org/review/5905
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 47 insertions, 0 deletions

diff --git a/wsutil/floorl.c b/wsutil/floorl.c
new file mode 100644
index 0000000000..5ca7354441
--- /dev/null
+++ b/wsutil/floorl.c
@@ -0,0 +1,47 @@
+/* floorl.c
+ * 
+ * Provides floorl function for systems that do not provide it
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+
+#include "wsutil/floorl.h"
+
+#ifndef HAVE_FLOORL
+long double
+floorl(long double x)
+{
+#ifdef (__GNUC__)
+  /*
+   * Handle platforms where GCC has the builtin but the platform's
+   * headers (including the headers used with GCC!) don't define
+   * floorl() to use it.
+   *
+   * XXX - are there any such platforms?
+   */
+  __builtin_floorl(x);
+#else
+  /* Not perfect, but probably the best workaround available */
+  return floor((double)x);
+#endif
+}
+
+#endif /* !HAVE_FLOORL */