New module 'ceil-ieee'.

* modules/ceil-ieee: New file.
* m4/ceil.m4 (gl_FUNC_CEIL): Require gl_MATH_H_DEFAULTS. If
gl_FUNC_CEIL_IEEE is also used, test whether ceil works according to
ISO C 99 with IEC 60559.
* m4/ceil-ieee.m4: New file.
* modules/ceil (Files): Add lib/ceil.c.
(Depends-on): Add 'float'.
(configure.ac): Invoke gl_MATH_MODULE_INDICATOR.
* lib/math.in.h (ceil): New declaration.
* m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize GNULIB_CEIL,
REPLACE_CEIL.
* modules/math (Makefile.am): Substitute GNULIB_CEIL, REPLACE_CEIL.
* modules/ceil-ieee-tests: New file.
* tests/test-ceil-ieee.c: New file, based on tests/test-ceilf-ieee.c.
* tests/test-math-c++.cc: Check the signature of 'ceil'.
* doc/posix-functions/ceil.texi: Mention the new module.

1 files changed, 32 insertions, 0 deletions

diff --git a/tests/test-ceil-ieee.c b/tests/test-ceil-ieee.c
new file mode 100644
index 0000000000..06cfeff9e0
--- /dev/null
+++ b/tests/test-ceil-ieee.c
@@ -0,0 +1,32 @@
+/* Test of rounding towards positive infinity.
+   Copyright (C) 2010 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/>.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include "minus-zero.h"
+#include "macros.h"
+
+int
+main ()
+{
+  /* Zero.  */
+  ASSERT (!signbit (ceil (0.0)));
+  ASSERT (!!signbit (ceil (minus_zerod)) == !!signbit (minus_zerod));
+
+  return 0;
+}