| /* Test file for mpfr_log10. |
| |
| Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| Contributed by the Arenaire and Cacao 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 2.1 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.LIB. If not, 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, mp_rnd_t rnd_mode) |
| { |
| int res; |
| int ok = rnd_mode == GMP_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, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0); |
| |
| /* check Inf */ |
| mpfr_set_inf (x, -1); |
| inex = test_log10 (y, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0); |
| |
| mpfr_set_inf (x, 1); |
| inex = test_log10 (y, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_inf_p (y) && mpfr_sgn (y) > 0 && inex == 0); |
| |
| mpfr_set_ui (x, 0, GMP_RNDN); |
| inex = test_log10 (x, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); |
| mpfr_set_ui (x, 0, GMP_RNDN); |
| mpfr_neg (x, x, GMP_RNDN); |
| inex = test_log10 (x, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); |
| |
| /* check negative argument */ |
| mpfr_set_si (x, -1, GMP_RNDN); |
| inex = test_log10 (y, x, GMP_RNDN); |
| MPFR_ASSERTN (mpfr_nan_p (y) && inex == 0); |
| |
| /* check log10(1) = 0 */ |
| mpfr_set_ui (x, 1, GMP_RNDN); |
| inex = test_log10 (y, x, GMP_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, GMP_RNDN); |
| for (n = 1; n <= 15; n++) |
| { |
| mpfr_mul_ui (x, x, 10, GMP_RNDN); /* x = 10^n */ |
| inex = test_log10 (y, x, GMP_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; |
| } |