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Annotation of OpenXM_contrib/gmp/mpfr/tests/teq.c, Revision 1.1

1.1     ! ohara       1: /* Test file for mpfr_eq.
        !             2:
        !             3: Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the MPFR Library.
        !             6:
        !             7: The MPFR 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 MPFR 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 MPFR 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 <math.h>
        !            25: #include "gmp.h"
        !            26: #include "mpfr.h"
        !            27: #include "mpfr-impl.h"
        !            28:
        !            29: void teq _PROTO ((mpfr_t));
        !            30:
        !            31: void
        !            32: teq (mpfr_t x)
        !            33: {
        !            34:   mpfr_t y; long k, px, mx;
        !            35:
        !            36:   mpfr_init2(y, MPFR_PREC(x));
        !            37:
        !            38:   mx = (MPFR_PREC(x) - 1)/mp_bits_per_limb;
        !            39:   px = mp_bits_per_limb - 2;
        !            40:
        !            41:   for (k = 2; k < MPFR_PREC(x); k++)
        !            42:     {
        !            43:       mpfr_set(y, x, GMP_RNDN);
        !            44:
        !            45:       MPFR_MANT(y) [mx] ^= (mp_limb_t) 1 << px;
        !            46:
        !            47:       if (mpfr_eq(y, x, k) ||
        !            48:          !mpfr_eq(y, x, k - 1))
        !            49:        {
        !            50:          fprintf(stderr, "Error in eq.\n");
        !            51:          printf("x = "); mpfr_print_binary(x); printf("\n");
        !            52:          printf("y = "); mpfr_print_binary(y); printf("\n");
        !            53:          printf("k = %ld\n", k);
        !            54:          printf("mpfr_eq(y, x, k) = %d\nmpfr_eq(y, x, k - 1) = %d\n", mpfr_eq(y, x, k),mpfr_eq(y, x, k - 1));
        !            55:          mpfr_clear(x); mpfr_clear(y);
        !            56:          exit(-1);
        !            57:        }
        !            58:
        !            59:       if (px) { --px; } else { --mx; px = mp_bits_per_limb - 1; }
        !            60:     }
        !            61:   mpfr_clear(y);
        !            62: }
        !            63:
        !            64: int
        !            65: main (void)
        !            66: {
        !            67:   int j; mpfr_t x;
        !            68:
        !            69:   mpfr_init2 (x, 1000);
        !            70:
        !            71:   for (j=0;j<1000;j++) {
        !            72:     mpfr_random (x);
        !            73:     teq (x);
        !            74:   }
        !            75:   mpfr_clear (x);
        !            76:
        !            77:   return 0;
        !            78: }