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/* Test mpf_get_str and mpf_set_str.
Copyright 1996, 2000, 2001, 2008 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU 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 MP Library test suite 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 General
Public License for more details.
You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite. If not, see http://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h> /* for strlen */
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"
#ifndef SIZE
#define SIZE 10
#endif
#ifndef EXPO
#define EXPO 200
#endif
int
main (int argc, char **argv)
{
mpf_t x, y;
int reps = 20000;
int i;
mp_size_t bprec = 100;
mpf_t d, rerr, max_rerr, limit_rerr;
char *str;
mp_exp_t bexp;
long size, exp;
int base;
char buf[SIZE * GMP_LIMB_BITS + 5];
tests_start ();
if (argc > 1)
{
reps = strtol (argv[1], 0, 0);
if (argc > 2)
bprec = strtol (argv[2], 0, 0);
}
mpf_set_default_prec (bprec);
mpf_init_set_ui (limit_rerr, 1);
mpf_div_2exp (limit_rerr, limit_rerr, bprec);
#if VERBOSE
mpf_dump (limit_rerr);
#endif
mpf_init (rerr);
mpf_init_set_ui (max_rerr, 0);
mpf_init (x);
mpf_init (y);
mpf_init (d);
/* First test some specific values. */
mpf_set_str (y, "1.23456e1000", 0);
mpf_set_str (x, "1.23456e1000", 10);
if (mpf_cmp (x, y) != 0)
abort ();
mpf_set_str (x, "1.23456e+1000", 0);
if (mpf_cmp (x, y) != 0)
abort ();
mpf_set_str (x, "1.23456e+1000", 10);
if (mpf_cmp (x, y) != 0)
abort ();
/* Now test random values. */
for (i = 0; i < reps; i++)
{
if (i == 0)
{
/* exercise the special case in get_str for for x==0 */
mpf_set_ui (x, 0L);
base = 10;
}
else
{
size = urandom () % (2 * SIZE) - SIZE;
exp = urandom () % EXPO;
mpf_random2 (x, size, exp);
base = urandom () % 61 + 2;
}
str = mpf_get_str (0, &bexp, base, 0, x);
if (str[0] == '-')
sprintf (buf, "-0.%s@%ld", str + 1, bexp);
else
sprintf (buf, "0.%s@%ld", str, bexp);
mpf_set_str_or_abort (y, buf, -base);
(*__gmp_free_func) (str, strlen (str) + 1);
mpf_reldiff (rerr, x, y);
if (mpf_cmp (rerr, max_rerr) > 0)
{
mpf_set (max_rerr, rerr);
#if VERBOSE
mpf_dump (max_rerr);
#endif
if (mpf_cmp (rerr, limit_rerr) > 0)
{
printf ("ERROR after %d tests\n", i);
printf ("base = %d\n", base);
printf (" x = "); mpf_dump (x);
printf (" y = "); mpf_dump (y);
abort ();
}
}
}
mpf_clear (limit_rerr);
mpf_clear (rerr);
mpf_clear (max_rerr);
mpf_clear (x);
mpf_clear (y);
mpf_clear (d);
tests_end ();
exit (0);
}
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