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Annotation of OpenXM_contrib/gmp/mpq/tests/t-get_d.c, Revision 1.1.1.1

1.1       maekawa     1: /* Test mpq_get_d
                      2:
                      3: Copyright (C) 1991, 1993, 1994, 1996 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 Library General Public License as published by
                      9: the Free Software Foundation; either version 2 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 Library General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Library 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 "gmp.h"
                     24: #include "gmp-impl.h"
                     25: #include "urandom.h"
                     26:
                     27: #ifndef SIZE
                     28: #define SIZE 8
                     29: #endif
                     30:
                     31: main (argc, argv)
                     32:      int argc;
                     33:      char **argv;
                     34: {
                     35:   mpq_t a;
                     36:   mp_size_t size;
                     37:   int reps = 10000;
                     38:   int i, j;
                     39:   double last_d, new_d;
                     40:   mpz_t eps;
                     41:
                     42:   if (argc == 2)
                     43:      reps = atoi (argv[1]);
                     44:
                     45:   /* The idea here is to test the monotonousness of mpq_get_d by adding
                     46:      numbers to the numerator and denominator.  */
                     47:
                     48:   mpq_init (a);
                     49:   mpz_init (eps);
                     50:
                     51:   for (i = 0; i < reps; i++)
                     52:     {
                     53:       size = urandom () % SIZE - SIZE/2;
                     54:       mpz_random2 (mpq_numref (a), size);
                     55:       do
                     56:        {
                     57:          size = urandom () % SIZE - SIZE/2;
                     58:          mpz_random2 (mpq_denref (a), size);
                     59:        }
                     60:       while (mpz_cmp_ui (mpq_denref (a), 0) == 0);
                     61:
                     62:       mpq_canonicalize (a);
                     63:
                     64:       last_d = mpq_get_d (a);
                     65:       for (j = 0; j < 10; j++)
                     66:        {
                     67:          size = urandom () % SIZE;
                     68:          mpz_random2 (eps, size);
                     69:          mpz_add (mpq_numref (a), mpq_numref (a), eps);
                     70:          mpq_canonicalize (a);
                     71:          new_d = mpq_get_d (a);
                     72:          if (last_d > new_d)
                     73:            abort ();
                     74:          last_d = new_d;
                     75:        }
                     76:     }
                     77:
                     78:   exit (0);
                     79: }
                     80:
                     81: dump (x)
                     82:      mpq_t x;
                     83: {
                     84:   mpz_out_str (stdout, 10, mpq_numref (x));
                     85:   printf ("/");
                     86:   mpz_out_str (stdout, 10, mpq_denref (x));
                     87:   printf ("\n");
                     88: }