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Diffstat (limited to 'mpfr/tests/tlog10.c')
-rw-r--r-- | mpfr/tests/tlog10.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/mpfr/tests/tlog10.c b/mpfr/tests/tlog10.c new file mode 100644 index 0000000000..eb8a587a45 --- /dev/null +++ b/mpfr/tests/tlog10.c @@ -0,0 +1,122 @@ +/* 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; +} |