Annotation of OpenXM_contrib/gmp/tests/mpq/t-get_d.c, Revision 1.1
1.1 ! ohara 1: /* Test mpq_get_d and mpq_set_d
! 2:
! 3: Copyright 1991, 1993, 1994, 1996, 2000, 2001, 2002 Free Software Foundation,
! 4: Inc.
! 5:
! 6: This file is part of the GNU MP Library.
! 7:
! 8: The GNU MP Library is free software; you can redistribute it and/or modify
! 9: it under the terms of the GNU Lesser General Public License as published by
! 10: the Free Software Foundation; either version 2.1 of the License, or (at your
! 11: option) any later version.
! 12:
! 13: The GNU MP Library is distributed in the hope that it will be useful, but
! 14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 15: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
! 16: License for more details.
! 17:
! 18: You should have received a copy of the GNU Lesser General Public License
! 19: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 21: MA 02111-1307, USA. */
! 22:
! 23: #include <stdio.h>
! 24: #include <stdlib.h>
! 25:
! 26: #include "gmp.h"
! 27: #include "gmp-impl.h"
! 28: #include "tests.h"
! 29:
! 30: #ifndef SIZE
! 31: #define SIZE 8
! 32: #endif
! 33:
! 34: /* VAX D floats only have an 8 bit signed exponent, so anything 2^128 or
! 35: bigger will overflow, that being 4 limbs. */
! 36: #if defined (__vax__) && SIZE > 4
! 37: #undef SIZE
! 38: #define SIZE 4
! 39: #define EPSIZE 3
! 40: #else
! 41: #define EPSIZE SIZE
! 42: #endif
! 43:
! 44: void dump _PROTO ((mpq_t));
! 45:
! 46: int
! 47: main (int argc, char **argv)
! 48: {
! 49: mpq_t a;
! 50: mp_size_t size;
! 51: int reps = 1000;
! 52: int i, j;
! 53: double last_d, new_d;
! 54: mpq_t qlast_d, qnew_d;
! 55: mpq_t eps;
! 56:
! 57: tests_start ();
! 58:
! 59: if (argc == 2)
! 60: reps = atoi (argv[1]);
! 61:
! 62: /* The idea here is to test the monotonousness of mpq_get_d by adding
! 63: numbers to the numerator and denominator. */
! 64:
! 65: mpq_init (a);
! 66: mpq_init (eps);
! 67: mpq_init (qlast_d);
! 68: mpq_init (qnew_d);
! 69:
! 70: for (i = 0; i < reps; i++)
! 71: {
! 72: size = urandom () % SIZE - SIZE/2;
! 73: mpz_random2 (mpq_numref (a), size);
! 74: do
! 75: {
! 76: size = urandom () % SIZE - SIZE/2;
! 77: mpz_random2 (mpq_denref (a), size);
! 78: }
! 79: while (mpz_cmp_ui (mpq_denref (a), 0) == 0);
! 80:
! 81: mpq_canonicalize (a);
! 82:
! 83: last_d = mpq_get_d (a);
! 84: mpq_set_d (qlast_d, last_d);
! 85: for (j = 0; j < 10; j++)
! 86: {
! 87: size = urandom () % EPSIZE + 1;
! 88: mpz_random2 (mpq_numref (eps), size);
! 89: size = urandom () % EPSIZE + 1;
! 90: mpz_random2 (mpq_denref (eps), size);
! 91: mpq_canonicalize (eps);
! 92:
! 93: mpq_add (a, a, eps);
! 94: mpq_canonicalize (a);
! 95: new_d = mpq_get_d (a);
! 96: if (last_d > new_d)
! 97: {
! 98: fprintf (stderr, "ERROR (test %d/%d): bad mpq_get_d results\n", i, j);
! 99: printf ("\nlast: %.16g\n ", last_d);
! 100: printf (" new: %.16g\n ", new_d); dump (a);
! 101: abort ();
! 102: }
! 103: mpq_set_d (qnew_d, new_d);
! 104: MPQ_CHECK_FORMAT (qnew_d);
! 105: if (mpq_cmp (qlast_d, qnew_d) > 0)
! 106: {
! 107: fprintf (stderr,
! 108: "ERROR (test %d/%d): bad mpq_set_d results\n", i, j);
! 109: printf ("\nlast: %.16g\n ", last_d); dump (qlast_d);
! 110: printf (" new: %.16g\n ", new_d); dump (qnew_d);
! 111: abort ();
! 112: }
! 113: last_d = new_d;
! 114: mpq_set (qlast_d, qnew_d);
! 115: }
! 116: }
! 117:
! 118: mpq_clear (a);
! 119: mpq_clear (eps);
! 120: mpq_clear (qlast_d);
! 121: mpq_clear (qnew_d);
! 122:
! 123: tests_end ();
! 124: exit (0);
! 125: }
! 126:
! 127: void
! 128: dump (mpq_t x)
! 129: {
! 130: mpz_out_str (stdout, 10, mpq_numref (x));
! 131: printf ("/");
! 132: mpz_out_str (stdout, 10, mpq_denref (x));
! 133: printf ("\n");
! 134: }
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