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/* Test file for mpfr_log10p1.
Copyright 2001-2021 Free Software Foundation, Inc.
Contributed by the AriC and Caramba 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
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-test.h"
#define TEST_FUNCTION mpfr_log10p1
#define TEST_RANDOM_EMAX 80
#include "tgeneric.c"
static void
special (void)
{
mpfr_t x;
int inex;
mpfr_init2 (x, MPFR_PREC_MIN);
mpfr_set_nan (x);
mpfr_clear_flags ();
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
mpfr_set_inf (x, -1);
mpfr_clear_flags ();
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
mpfr_set_inf (x, 1);
mpfr_clear_flags ();
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0);
MPFR_ASSERTN (__gmpfr_flags == 0);
mpfr_set_ui (x, 0, MPFR_RNDN);
mpfr_clear_flags ();
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x) && inex == 0);
MPFR_ASSERTN (__gmpfr_flags == 0);
mpfr_neg (x, x, MPFR_RNDN);
mpfr_clear_flags ();
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_NEG (x) && inex == 0);
MPFR_ASSERTN (__gmpfr_flags == 0);
mpfr_set_si (x, -1, MPFR_RNDN);
mpfr_clear_flags ();
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0);
MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_DIVBY0);
mpfr_set_si (x, -2, MPFR_RNDN);
mpfr_clear_flags ();
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0);
MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
/* include one hard-coded test */
mpfr_set_prec (x, 32);
mpfr_set_ui (x, 17, MPFR_RNDN);
inex = mpfr_log10p1 (x, x, MPFR_RNDN);
MPFR_ASSERTN (mpfr_cmp_ui_2exp (x, 1347838589UL, -30) == 0);
MPFR_ASSERTN (inex < 0);
mpfr_clear (x);
}
/* check exact cases, when 1+x = 10^k (can only occur for k >= 0) */
static void
check_exact (void)
{
mpfr_exp_t k;
mpfr_t x;
int inex, r;
#define KMAX 100
mpfr_init2 (x, 333); /* 10^100 has 333 bits */
for (k = 0; k <= KMAX; k++)
RND_LOOP (r)
{
inex = mpfr_ui_pow_ui (x, 10, k, (mpfr_rnd_t) r);
MPFR_ASSERTN(inex == 0);
inex = mpfr_sub_ui (x, x, 1, (mpfr_rnd_t) r);
MPFR_ASSERTN(inex == 0);
inex = mpfr_log10p1 (x, x, (mpfr_rnd_t) r);
MPFR_ASSERTN(mpfr_cmp_si0 (x, k) == 0);
MPFR_ASSERTN(inex == 0);
}
mpfr_clear (x);
}
int
main (int argc, char *argv[])
{
tests_start_mpfr ();
special ();
check_exact ();
test_generic (MPFR_PREC_MIN, 100, 50);
tests_end_mpfr ();
return 0;
}
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