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/* Test file for mpfr_out_str.
Copyright 1999, 2001-2025 Free Software Foundation, Inc.
Contributed by the Pascaline 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/>. */
/* FIXME: The output is not tested (thus coverage data are meaningless). */
#include <float.h>
#include "mpfr-test.h"
FILE *fout;
#define check(d,r,b) check4(d,r,b,53)
static void
check4 (double d, mpfr_rnd_t rnd, int base, int prec)
{
mpfr_t x;
mpfr_init2 (x, prec);
mpfr_set_d (x, d, rnd);
fprintf (fout, "%1.19e base %d %s:\n ", d, base, mpfr_print_rnd_mode (rnd));
mpfr_out_str (fout, base, (base == 2) ? prec : 0, x, rnd);
fputc ('\n', fout);
mpfr_clear (x);
}
static void
special (void)
{
mpfr_t x;
unsigned int n;
mpfr_init (x);
mpfr_set_nan (x);
n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
fputc ('\n', fout);
if (n != 5)
{
printf ("Error: mpfr_out_str (file, 10, 0, NaN, MPFR_RNDN) wrote %u "
"characters instead of 5.\n", n);
exit (1);
}
mpfr_set_inf (x, 1);
n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
fputc ('\n', fout);
if (n != 5)
{
printf ("Error: mpfr_out_str (file, 10, 0, +Inf, MPFR_RNDN) wrote %u "
"characters instead of 5.\n", n);
exit (1);
}
mpfr_set_inf (x, -1);
n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
fputc ('\n', fout);
if (n != 6)
{
printf ("Error: mpfr_out_str (file, 10, 0, -Inf, MPFR_RNDN) wrote %u "
"characters instead of 6.\n", n);
exit (1);
}
mpfr_set_ui (x, 0, MPFR_RNDN);
n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
fputc ('\n', fout);
if (n != 1)
{
printf ("Error: mpfr_out_str (file, 10, 0, +0, MPFR_RNDN) wrote %u "
"characters instead of 1.\n", n);
exit (1);
}
mpfr_neg (x, x, MPFR_RNDN);
n = mpfr_out_str (fout, 10, 0, x, MPFR_RNDN);
fputc ('\n', fout);
if (n != 2)
{
printf ("Error: mpfr_out_str (file, 10, 0, -0, MPFR_RNDN) wrote %u "
"characters instead of 2.\n", n);
exit (1);
}
mpfr_clear (x);
}
int
main (int argc, char *argv[])
{
const char *fname = "tout_str_out.txt";
int i, N = 10000;
tests_start_mpfr ();
/* with no argument: prints to a temporary file,
tout_str N: prints N tests to stdout */
if (argc == 1)
{
fout = fopen (fname, "w");
if (fout == NULL)
{
perror (NULL);
fprintf (stderr, "Failed to open \"%s\" for writing\n", fname);
exit (1);
}
}
else
{
fout = stdout;
N = atoi (argv[1]);
}
special ();
check (-1.37247529013405550000e+15, MPFR_RNDN, 7);
check (-1.5674376729569697500e+15, MPFR_RNDN, 19);
check (-5.71262771772792640000e-79, MPFR_RNDU, 16);
check (DBL_NEG_ZERO, MPFR_RNDU, 7);
check (-4.5306392613572974756e-308, MPFR_RNDN, 8);
check (-6.7265890111403371523e-165, MPFR_RNDN, 4);
check (-1.3242553591261807653e+156, MPFR_RNDN, 16);
check (-6.606499965302424244461355e233, MPFR_RNDN, 10);
check4 (1.0, MPFR_RNDN, 10, 120);
check (1.0, MPFR_RNDU, 10);
check (4.059650008e-83, MPFR_RNDN, 10);
check (-7.4, MPFR_RNDN, 10);
check (0.997, MPFR_RNDN, 10);
check (-4.53063926135729747564e-308, MPFR_RNDN, 10);
check (2.14478198760196000000e+16, MPFR_RNDN, 10);
check (7.02293374921793516813e-84, MPFR_RNDN, 10);
/* random tests */
for (i = 0; i < N; i++)
{
double d;
mpfr_rnd_t rnd;
int b;
d = DBL_RAND ();
rnd = RND_RAND ();
do
b = (randlimb () % (62 + 36 + 1)) - 36;
while (b > -2 && b < 2);
check (d, rnd, b);
}
if (fout != stdout)
{
if (fclose (fout) != 0)
{
perror (NULL);
fprintf (stderr, "Failed to close \"%s\"\n", fname);
exit (1);
}
remove (fname);
}
tests_end_mpfr ();
return 0;
}
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