130 lines
3.0 KiB
C
130 lines
3.0 KiB
C
/* Test mpf_get_str and mpf_set_str.
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Copyright 1996, 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h> /* for strlen */
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "tests.h"
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#ifndef SIZE
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#define SIZE 10
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#endif
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#ifndef EXPO
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#define EXPO 200
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#endif
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int
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main (int argc, char **argv)
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{
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mpf_t x, y;
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int reps = 20000;
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int i;
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mp_size_t bprec = 100;
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mpf_t d, rerr, max_rerr, limit_rerr;
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char *str;
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mp_exp_t bexp;
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long size, exp;
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int base;
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char buf[SIZE * BITS_PER_MP_LIMB + 5];
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tests_start ();
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if (argc > 1)
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{
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reps = strtol (argv[1], 0, 0);
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if (argc > 2)
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bprec = strtol (argv[2], 0, 0);
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}
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mpf_set_default_prec (bprec);
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mpf_init_set_ui (limit_rerr, 1);
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mpf_div_2exp (limit_rerr, limit_rerr, bprec);
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#if VERBOSE
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mpf_dump (limit_rerr);
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#endif
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mpf_init (rerr);
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mpf_init_set_ui (max_rerr, 0);
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mpf_init (x);
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mpf_init (y);
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mpf_init (d);
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for (i = 0; i < reps; i++)
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{
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if (i == 0)
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{
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/* exercise the special case in get_str for for x==0 */
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mpf_set_ui (x, 0L);
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base = 10;
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}
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else
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{
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size = urandom () % (2 * SIZE) - SIZE;
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exp = urandom () % EXPO;
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mpf_random2 (x, size, exp);
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base = urandom () % 61 + 2;
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}
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str = mpf_get_str (0, &bexp, base, 0, x);
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if (str[0] == '-')
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sprintf (buf, "-0.%s@%ld", str + 1, bexp);
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else
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sprintf (buf, "0.%s@%ld", str, bexp);
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mpf_set_str_or_abort (y, buf, -base);
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(*__gmp_free_func) (str, strlen (str) + 1);
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mpf_reldiff (rerr, x, y);
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if (mpf_cmp (rerr, max_rerr) > 0)
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{
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mpf_set (max_rerr, rerr);
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#if VERBOSE
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mpf_dump (max_rerr);
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#endif
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if (mpf_cmp (rerr, limit_rerr) > 0)
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{
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printf ("ERROR after %d tests\n", i);
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printf ("base = %d\n", base);
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printf (" x = "); mpf_dump (x);
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printf (" y = "); mpf_dump (y);
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abort ();
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}
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}
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}
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mpf_clear (limit_rerr);
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mpf_clear (rerr);
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mpf_clear (max_rerr);
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mpf_clear (x);
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mpf_clear (y);
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mpf_clear (d);
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tests_end ();
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exit (0);
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}
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