new test file

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@999 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 97 insertions, 0 deletions

diff --git a/tests/tisnan.c b/tests/tisnan.c
new file mode 100644
index 000000000..1a7e646b7
--- /dev/null
+++ b/tests/tisnan.c
@@ -0,0 +1,97 @@
+/* Test file for mpfr_nan_p, mpfr_inf_p and mpfr_number_p.
+
+Copyright (C) 2001 Free Software Foundation.
+
+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 Library General Public License as published by
+the Free Software Foundation; either version 2 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library 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 "gmp.h"
+#include "mpfr.h"
+
+int
+main (void)
+{
+  mpfr_t  x;
+
+  mpfr_init (x);
+
+  /* check +infinity gives non-zero for mpfr_inf_p only */
+  mpfr_set_ui (x, 1L, GMP_RNDZ);
+  mpfr_div_ui (x, x, 0L, GMP_RNDZ);
+  if (mpfr_nan_p (x)) {
+    fprintf (stderr, "Error: mpfr_nan_p(+Inf) gives non-zero\n");
+    exit (1);
+  }
+  if (mpfr_inf_p (x) == 0) {
+    fprintf (stderr, "Error: mpfr_inf_p(+Inf) gives zero\n");
+    exit (1);
+  }
+  if (mpfr_number_p (x)) {
+    fprintf (stderr, "Error: mpfr_number_p(+Inf) gives non-zero\n");
+    exit (1);
+  }
+
+  /* same for -Inf */
+  mpfr_neg (x, x, GMP_RNDN);
+  if (mpfr_nan_p (x)) {
+    fprintf (stderr, "Error: mpfr_nan_p(-Inf) gives non-zero\n");
+    exit (1);
+  }
+  if (mpfr_inf_p (x) == 0) {
+    fprintf (stderr, "Error: mpfr_inf_p(-Inf) gives zero\n");
+    exit (1);
+  }
+  if (mpfr_number_p (x)) {
+    fprintf (stderr, "Error: mpfr_number_p(-Inf) gives non-zero\n");
+    exit (1);
+  }
+
+  /* same for NaN */
+  mpfr_sub (x, x, x, GMP_RNDN);
+  if (mpfr_nan_p (x) == 0) {
+    fprintf (stderr, "Error: mpfr_nan_p(NaN) gives zero\n");
+    exit (1);
+  }
+  if (mpfr_inf_p (x)) {
+    fprintf (stderr, "Error: mpfr_inf_p(NaN) gives non-zero\n");
+    exit (1);
+  }
+  if (mpfr_number_p (x)) {
+    fprintf (stderr, "Error: mpfr_number_p(NaN) gives non-zero\n");
+    exit (1);
+  }
+
+  /* same for an ordinary number */
+  mpfr_set_ui (x, 1, GMP_RNDN);
+  if (mpfr_nan_p (x)) {
+    fprintf (stderr, "Error: mpfr_nan_p(1) gives non-zero\n");
+    exit (1);
+  }
+  if (mpfr_inf_p (x)) {
+    fprintf (stderr, "Error: mpfr_inf_p(1) gives non-zero\n");
+    exit (1);
+  }
+  if (mpfr_number_p (x) == 0) {
+    fprintf (stderr, "Error: mpfr_number_p(1) gives zero\n");
+    exit (1);
+  }
+
+  mpfr_clear (x);
+
+  return 0;
+}