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