1 files changed, 122 insertions, 0 deletions
diff --git a/tests/tlog10.c b/tests/tlog10.c
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+/* Test file for mpfr_log10.
+
+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"
+
+#ifdef CHECK_EXTERNAL
+static int
+test_log10 (mpfr_ptr a, mpfr_srcptr b, mpfr_rnd_t rnd_mode)
+{
+  int res;
+  int ok = rnd_mode == MPFR_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53;
+  if (ok)
+    {
+      mpfr_print_raw (b);
+    }
+  res = mpfr_log10 (a, b, rnd_mode);
+  if (ok)
+    {
+      printf (" ");
+      mpfr_print_raw (a);
+      printf ("\n");
+    }
+  return res;
+}
+#else
+#define test_log10 mpfr_log10
+#endif
+
+#define TEST_FUNCTION test_log10
+#define TEST_RANDOM_POS 8
+#include "tgeneric.c"
+
+int
+main (int argc, char *argv[])
+{
+  mpfr_t x, y;
+  unsigned int n;
+  int inex;
+
+  tests_start_mpfr ();
+
+  test_generic (2, 100, 20);
+
+  mpfr_init2 (x, 53);
+  mpfr_init2 (y, 53);
+
+  /* check NaN */
+  mpfr_set_nan (x);
+  inex = test_log10 (y, x, MPFR_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0);
+
+  /* check Inf */
+  mpfr_set_inf (x, -1);
+  inex = test_log10 (y, x, MPFR_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0);
+
+  mpfr_set_inf (x, 1);
+  inex = test_log10 (y, x, MPFR_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (y) && mpfr_sgn (y) > 0 && inex == 0);
+
+  mpfr_set_ui (x, 0, MPFR_RNDN);
+  inex = test_log10 (x, x, MPFR_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
+  mpfr_set_ui (x, 0, MPFR_RNDN);
+  mpfr_neg (x, x, MPFR_RNDN);
+  inex = test_log10 (x, x, MPFR_RNDN);
+  MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
+
+  /* check negative argument */
+  mpfr_set_si (x, -1, MPFR_RNDN);
+  inex = test_log10 (y, x, MPFR_RNDN);
+  MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0);
+
+  /* check log10(1) = 0 */
+  mpfr_set_ui (x, 1, MPFR_RNDN);
+  inex = test_log10 (y, x, MPFR_RNDN);
+  MPFR_ASSERTN (mpfr_cmp_ui (y, 0) == 0 && MPFR_IS_POS (y) && inex == 0);
+
+  /* check log10(10^n)=n */
+  mpfr_set_ui (x, 1, MPFR_RNDN);
+  for (n = 1; n <= 15; n++)
+    {
+      mpfr_mul_ui (x, x, 10, MPFR_RNDN); /* x = 10^n */
+      inex = test_log10 (y, x, MPFR_RNDN);
+      if (mpfr_cmp_ui (y, n))
+        {
+          printf ("log10(10^n) <> n for n=%u\n", n);
+          exit (1);
+        }
+      MPFR_ASSERTN (inex == 0);
+    }
+
+  mpfr_clear (x);
+  mpfr_clear (y);
+
+  data_check ("data/log10", mpfr_log10, "mpfr_log10");
+
+  tests_end_mpfr ();
+  return 0;
+}