1 files changed, 116 insertions, 0 deletions
diff --git a/mpfr/tests/tconst_euler.c b/mpfr/tests/tconst_euler.c
new file mode 100644
index 0000000000..179b41700f
--- /dev/null
+++ b/mpfr/tests/tconst_euler.c
@@ -0,0 +1,116 @@
+/* Test file for mpfr_const_euler.
+
+Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel 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 <stdio.h>
+#include <stdlib.h>
+
+#include "mpfr-test.h"
+
+/* Wrapper for tgeneric */
+static int
+my_const_euler (mpfr_ptr x, mpfr_srcptr y, mpfr_rnd_t r)
+{
+  return mpfr_const_euler (x, r);
+}
+
+#define RAND_FUNCTION(x) mpfr_set_ui ((x), 0, MPFR_RNDN)
+#define TEST_FUNCTION my_const_euler
+#include "tgeneric.c"
+
+int
+main (int argc, char *argv[])
+{
+  mpfr_t gamma, y, z, t;
+  unsigned int err, prec, yprec, p0 = 2, p1 = 200;
+  int rnd;
+
+  tests_start_mpfr ();
+
+  prec = (argc < 2) ? 53 : atoi(argv[1]);
+
+  if (argc > 1)
+    {
+      mpfr_init2 (gamma, prec);
+      mpfr_const_euler (gamma, MPFR_RNDN);
+      printf("gamma="); mpfr_out_str (stdout, 10, 0, gamma, MPFR_RNDD);
+      puts ("");
+      mpfr_clear (gamma);
+      return 0;
+    }
+
+  mpfr_init (y);
+  mpfr_init (z);
+  mpfr_init (t);
+
+  mpfr_set_prec (y, 32);
+  mpfr_set_prec (z, 32);
+  (mpfr_const_euler) (y, MPFR_RNDN);
+  mpfr_set_str_binary (z, "0.10010011110001000110011111100011");
+  if (mpfr_cmp (y, z))
+    {
+      printf ("Error for prec=32\n");
+      exit (1);
+    }
+
+  for (prec = p0; prec <= p1; prec++)
+    {
+      mpfr_set_prec (z, prec);
+      mpfr_set_prec (t, prec);
+      yprec = prec + 10;
+
+      for (rnd = 0; rnd < MPFR_RND_MAX; rnd++)
+        {
+          mpfr_set_prec (y, yprec);
+          mpfr_const_euler (y, (mpfr_rnd_t) rnd);
+          err = (rnd == MPFR_RNDN) ? yprec + 1 : yprec;
+          if (mpfr_can_round (y, err, (mpfr_rnd_t) rnd, (mpfr_rnd_t) rnd, prec))
+            {
+              mpfr_set (t, y, (mpfr_rnd_t) rnd);
+              mpfr_const_euler (z, (mpfr_rnd_t) rnd);
+              if (mpfr_cmp (t, z))
+                {
+                  printf ("results differ for prec=%u rnd_mode=%s\n", prec,
+                          mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
+                  printf ("   got      ");
+                  mpfr_out_str (stdout, 2, prec, z, MPFR_RNDN);
+                  puts ("");
+                  printf ("   expected ");
+                  mpfr_out_str (stdout, 2, prec, t, MPFR_RNDN);
+                  puts ("");
+                  printf ("   approximation was ");
+                  mpfr_print_binary (y);
+                  puts ("");
+                  exit (1);
+                }
+            }
+        }
+    }
+
+  mpfr_clear (y);
+  mpfr_clear (z);
+  mpfr_clear (t);
+
+  test_generic (2, 200, 1);
+
+  tests_end_mpfr ();
+  return 0;
+}