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Annotation of OpenXM_contrib/gmp/tests/mpf/t-conv.c, Revision 1.1.1.1

1.1       ohara       1: /* Test mpf_get_str and mpf_set_str.
                      2:
                      3: Copyright 1996, 2000, 2001 Free Software Foundation, Inc.
                      4:
                      5: This file is part of the GNU MP Library.
                      6:
                      7: The GNU MP Library is free software; you can redistribute it and/or modify
                      8: it under the terms of the GNU Lesser General Public License as published by
                      9: the Free Software Foundation; either version 2.1 of the License, or (at your
                     10: option) any later version.
                     11:
                     12: The GNU MP Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Lesser General Public License
                     18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA. */
                     21:
                     22: #include <stdio.h>
                     23: #include <stdlib.h>
                     24: #include <string.h> /* for strlen */
                     25:
                     26: #include "gmp.h"
                     27: #include "gmp-impl.h"
                     28: #include "tests.h"
                     29:
                     30: #ifndef SIZE
                     31: #define SIZE 10
                     32: #endif
                     33:
                     34: #ifndef EXPO
                     35: #define EXPO 20
                     36: #endif
                     37:
                     38: int
                     39: main (int argc, char **argv)
                     40: {
                     41:   mpf_t x, y;
                     42:   int reps = 20000;
                     43:   int i;
                     44:   mp_size_t bprec = 100;
                     45:   mpf_t d, rerr, max_rerr, limit_rerr;
                     46:   char *str;
                     47:   mp_exp_t bexp;
                     48:   long size, exp;
                     49:   int base;
                     50:   char buf[SIZE * BITS_PER_MP_LIMB + 5];
                     51:
                     52:   tests_start ();
                     53:
                     54:   if (argc > 1)
                     55:     {
                     56:       reps = strtol (argv[1], 0, 0);
                     57:       if (argc > 2)
                     58:        bprec = strtol (argv[2], 0, 0);
                     59:     }
                     60:
                     61:   mpf_set_default_prec (bprec);
                     62:
                     63:   mpf_init_set_ui (limit_rerr, 1);
                     64:   mpf_div_2exp (limit_rerr, limit_rerr, bprec);
                     65: #if VERBOSE
                     66:   mpf_dump (limit_rerr);
                     67: #endif
                     68:   mpf_init (rerr);
                     69:   mpf_init_set_ui (max_rerr, 0);
                     70:
                     71:   mpf_init (x);
                     72:   mpf_init (y);
                     73:   mpf_init (d);
                     74:
                     75:   for (i = 0; i < reps; i++)
                     76:     {
                     77:       if (i == 0)
                     78:         {
                     79:           /* exercise the special case in get_str for for x==0 */
                     80:           mpf_set_ui (x, 0L);
                     81:           base = 10;
                     82:         }
                     83:       else
                     84:         {
                     85:           size = urandom () % (2 * SIZE) - SIZE;
                     86:           exp = urandom () % EXPO;
                     87:           mpf_random2 (x, size, exp);
                     88:           base = urandom () % 35 + 2;
                     89:         }
                     90:
                     91:       str = mpf_get_str (0, &bexp, base, 0, x);
                     92:
                     93:       if (str[0] == '-')
                     94:        sprintf (buf, "-0.%s@%ld", str + 1, bexp);
                     95:       else
                     96:        sprintf (buf, "0.%s@%ld", str, bexp);
                     97:
                     98:       mpf_set_str_or_abort (y, buf, -base);
                     99:       (*__gmp_free_func) (str, strlen (str) + 1);
                    100:
                    101:       mpf_reldiff (rerr, x, y);
                    102:       if (mpf_cmp (rerr, max_rerr) > 0)
                    103:        {
                    104:          mpf_set (max_rerr, rerr);
                    105: #if VERBOSE
                    106:          mpf_dump (max_rerr);
                    107: #endif
                    108:          if (mpf_cmp (rerr, limit_rerr) > 0)
                    109:            {
                    110:              printf ("ERROR after %d tests\n", i);
                    111:              printf ("base = %d\n", base);
                    112:              printf ("   x = "); mpf_dump (x);
                    113:              printf ("   y = "); mpf_dump (y);
                    114:              abort ();
                    115:            }
                    116:        }
                    117:     }
                    118:
                    119:   mpf_clear (limit_rerr);
                    120:   mpf_clear (rerr);
                    121:   mpf_clear (max_rerr);
                    122:
                    123:   mpf_clear (x);
                    124:   mpf_clear (y);
                    125:   mpf_clear (d);
                    126:
                    127:   tests_end ();
                    128:   exit (0);
                    129: }