new test file for mpfr_dim

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2679 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 104 insertions, 0 deletions

diff --git a/tests/tdim.c b/tests/tdim.c
new file mode 100644
index 000000000..cccca8aeb
--- /dev/null
+++ b/tests/tdim.c
@@ -0,0 +1,104 @@
+/* Test file for mpfr_dim.
+
+Copyright 2004 Free Software Foundation, Inc.
+
+This file is part of the MPFR Library.
+
+The 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 2.1 of the License, or (at your
+option) any later version.
+
+The 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 MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "mpfr-test.h"
+
+int
+main (void)
+{
+  mpfr_t x, y, z;
+
+  tests_start_mpfr ();
+
+  mpfr_init (x);
+  mpfr_init (y);
+  mpfr_init (z);
+
+  /* case x=NaN */
+  mpfr_set_nan (x);
+  mpfr_set_ui (y, 0, GMP_RNDN);
+  mpfr_dim (z, x, y, GMP_RNDN);
+  if (!mpfr_nan_p (z))
+    {
+      printf ("Error in mpfr_dim (NaN, 0)\n");
+      exit (1);
+    }
+
+  /* case x=+Inf */
+  mpfr_set_inf (x, 1);
+  mpfr_set_ui (y, 0, GMP_RNDN);
+  mpfr_dim (z, x, y, GMP_RNDN);
+  if (!mpfr_inf_p (z) || mpfr_sgn (z) < 0)
+    {
+      printf ("Error in mpfr_dim (+Inf, 0)\n");
+      exit (1);
+    }
+
+  /* case x=-Inf */
+  mpfr_set_inf (x, -1);
+  mpfr_set_ui (y, 0, GMP_RNDN);
+  mpfr_dim (z, x, y, GMP_RNDN);
+  if (mpfr_cmp_ui (z, 0) || mpfr_sgn (z) < 0)
+    {
+      printf ("Error in mpfr_dim (-Inf, 0)\n");
+      exit (1);
+    }
+
+  /* case x=y=+Inf */
+  mpfr_set_inf (x, 1);
+  mpfr_set_inf (y, 1);
+  mpfr_dim (z, x, y, GMP_RNDN);
+  if (mpfr_cmp_ui (z, 0) || mpfr_sgn (z) < 0)
+    {
+      printf ("Error in mpfr_dim (+Inf, 0)\n");
+      exit (1);
+    }
+
+  /* case x > y */
+  mpfr_set_ui (x, 2, GMP_RNDN);
+  mpfr_set_ui (y, 1, GMP_RNDN);
+  mpfr_dim (z, x, y, GMP_RNDN);
+  if (mpfr_cmp_ui (z, 1))
+    {
+      printf ("Error in mpfr_dim (2, 1)\n");
+      exit (1);
+    }
+
+  /* case x < y */
+  mpfr_set_ui (x, 1, GMP_RNDN);
+  mpfr_set_ui (y, 2, GMP_RNDN);
+  mpfr_dim (z, x, y, GMP_RNDN);
+  if (mpfr_cmp_ui (z, 0))
+    {
+      printf ("Error in mpfr_dim (1, 2)\n");
+      exit (1);
+    }
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+  mpfr_clear (z);
+
+  tests_end_mpfr ();
+  return 0;
+}