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Annotation of OpenXM_contrib/gmp/tests/mpz/t-get_d.c, Revision 1.1

1.1     ! ohara       1: /* Test mpz_get_d.
        !             2:
        !             3: Copyright 2002 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 "gmp.h"
        !            25: #include "gmp-impl.h"
        !            26: #include "tests.h"
        !            27:
        !            28:
        !            29: void
        !            30: check_onebit (void)
        !            31: {
        !            32:   int     i;
        !            33:   mpz_t   z;
        !            34:   double  got, want;
        !            35:   /* FIXME: It'd be better to base this on the float format. */
        !            36: #ifdef __vax
        !            37:   int     limit = 127;  /* vax fp numbers have limited range */
        !            38: #else
        !            39:   int     limit = 512;
        !            40: #endif
        !            41:
        !            42:   mpz_init (z);
        !            43:
        !            44:   mpz_set_ui (z, 1L);
        !            45:   want = 1.0;
        !            46:
        !            47:   for (i = 0; i < limit; i++)
        !            48:     {
        !            49:       got = mpz_get_d (z);
        !            50:
        !            51:       if (got != want)
        !            52:         {
        !            53:           printf    ("mpz_get_d wrong on 2**%d\n", i);
        !            54:           mpz_trace ("   z    ", z);
        !            55:           printf    ("   want  %.20g\n", want);
        !            56:           printf    ("   got   %.20g\n", got);
        !            57:           abort();
        !            58:         }
        !            59:
        !            60:       mpz_mul_2exp (z, z, 1L);
        !            61:       want *= 2.0;
        !            62:     }
        !            63:   mpz_clear (z);
        !            64: }
        !            65:
        !            66:
        !            67: int
        !            68: main (void)
        !            69: {
        !            70:   tests_start ();
        !            71:
        !            72:   check_onebit ();
        !            73:
        !            74:   tests_end ();
        !            75:   exit (0);
        !            76: }