2012-02-25 Bruno Haible <bruno@clisp.org>
+ Tests for module 'modfl'.
+ * modules/modfl-tests: New file.
+ * tests/test-modfl.c: New file.
+ * tests/test-math-c++.cc: Check the declaration of modfl.
+
New module 'modfl'.
* lib/math.in.h (modfl): New declaration.
* lib/modfl.c: New file.
SIGNATURE_CHECK (GNULIB_NAMESPACE::modff, float, (float, float *));
#endif
//SIGNATURE_CHECK (GNULIB_NAMESPACE::modf, double, (double, double *));
+#if GNULIB_TEST_MODFL
+SIGNATURE_CHECK (GNULIB_NAMESPACE::modfl, long double,
+ (long double, long double *));
+#endif
//SIGNATURE_CHECK (GNULIB_NAMESPACE::nextafter, double, (double, double));
--- /dev/null
+/* Test of modfl() function.
+ Copyright (C) 2010-2012 Free Software Foundation, Inc.
+
+ 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/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (modfl, long double, (long double, long double *));
+
+#include "fpucw.h"
+#include "macros.h"
+
+volatile long double x;
+long double y;
+long double z;
+
+int
+main ()
+{
+ DECL_LONG_DOUBLE_ROUNDING
+
+ BEGIN_LONG_DOUBLE_ROUNDING ();
+
+ /* A particular positive value. */
+ x = 5.972406760L;
+ y = modfl (x, &z);
+ ASSERT (y >= 0.972406759L && y <= 0.972406761L);
+ ASSERT (z == 5.0);
+
+ /* A particular negative value. */
+ x = -5.972406760L;
+ y = modfl (x, &z);
+ ASSERT (y >= -0.972406761L && y <= -0.972406759L);
+ ASSERT (z == -5.0L);
+
+ return 0;
+}