Makefile.am mpfr.h mpfr.texi set_zero.c: New function mpfr_set_zero.

tests/tset.c: Replace all MPFR_ASSERTN with verbose message. Add tests for mpfr_set_zero.


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@6339 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 31 insertions, 0 deletions

diff --git a/set_zero.c b/set_zero.c
new file mode 100644
index 000000000..8308c7022
--- /dev/null
+++ b/set_zero.c
@@ -0,0 +1,31 @@
+/* mpfr_set_zero -- set a number to plus or minus zero.
+
+Copyright 2009 Free Software Foundation, Inc.
+Contributed by the Arenaire and Cacao projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR 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 3 of the License, or (at your
+option) any later version.
+
+The GNU MPFR 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 the GNU MPFR Library; see the file COPYING.LIB.  If not, see
+http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include "mpfr-impl.h"
+
+void
+mpfr_set_zero (mpfr_ptr x, int sign)
+{
+  mpfr_set_ui (x, 0, MPFR_RNDN);
+  if (sign < 0)
+    MPFR_SET_NEG(x);
+}