added new function mpfr_get_q

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@11563 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 111 insertions, 0 deletions

diff --git a/tests/tget_q.c b/tests/tget_q.c
new file mode 100644
index 000000000..0bafd4817
--- /dev/null
+++ b/tests/tget_q.c
@@ -0,0 +1,111 @@
+/* Test file for mpfr_get_q.
+
+Copyright 2017 Free Software Foundation, Inc.
+Contributed by the AriC and Caramba 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.LESSER.  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-test.h"
+
+static void
+special (void)
+{
+  mpfr_t f;
+  mpq_t q;
+
+  mpfr_init2 (f, MPFR_PREC_MIN);
+  mpq_init (q);
+
+  /* check NaN */
+  mpfr_set_nan (f);
+  mpfr_clear_erangeflag ();
+  mpfr_get_q (q, f);
+  MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0);
+  MPFR_ASSERTN(mpfr_erangeflag_p ());
+
+  /* check +Inf */
+  mpfr_set_inf (f, 1);
+  mpfr_clear_erangeflag ();
+  mpfr_get_q (q, f);
+  MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0);
+  MPFR_ASSERTN(mpfr_erangeflag_p ());
+
+  /* check -Inf */
+  mpfr_set_inf (f, -1);
+  mpfr_clear_erangeflag ();
+  mpfr_get_q (q, f);
+  MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0);
+  MPFR_ASSERTN(mpfr_erangeflag_p ());
+
+  /* check +0 */
+  mpfr_set_zero (f, 1);
+  mpfr_clear_erangeflag ();
+  mpfr_get_q (q, f);
+  MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0);
+  MPFR_ASSERTN(!mpfr_erangeflag_p ());
+
+  /* check -0 */
+  mpfr_set_zero (f, -1);
+  mpfr_clear_erangeflag ();
+  mpfr_get_q (q, f);
+  MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0);
+  MPFR_ASSERTN(!mpfr_erangeflag_p ());
+
+  mpq_clear (q);
+  mpfr_clear (f);
+}
+
+static void
+random_tests (void)
+{
+  mpfr_t f, g;
+  mpq_t q;
+  int inex;
+  mpfr_rnd_t rnd;
+  int i;
+
+  mpfr_init2 (f, MPFR_PREC_MIN + (randlimb() % 100));
+  mpfr_init2 (g, mpfr_get_prec (f));
+  mpq_init (q);
+
+  for (i = 0; i < 1000; i++)
+    {
+      mpfr_urandomb (f, RANDS);
+      mpfr_get_q (q, f);
+      rnd = RND_RAND ();
+      inex = mpfr_set_q (g, q, rnd);
+      MPFR_ASSERTN(inex == 0);
+      MPFR_ASSERTN(mpfr_cmp (f, g) == 0);
+    }
+
+  mpq_clear (q);
+  mpfr_clear (f);
+  mpfr_clear (g);
+}
+
+int
+main (void)
+{
+  tests_start_mpfr ();
+
+  special ();
+  random_tests ();
+
+  tests_end_mpfr ();
+  return 0;
+}