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Annotation of OpenXM_contrib/gmp/mpfr/tests/teq.c, Revision 1.1.1.1

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: }