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/* Test file for mpfr_eq.
Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the MPFR Library.
The MPFR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.
The MPFR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "gmp.h"
#include "mpfr.h"
#include "mpfr-impl.h"
void teq (mpfr_t);
void teq (mpfr_t x)
{
mpfr_t y; long k, px, mx;
mpfr_init2(y, MPFR_PREC(x));
mx = (MPFR_PREC(x) - 1)/mp_bits_per_limb;
px = mp_bits_per_limb - 2;
for (k = 2; k < MPFR_PREC(x); k++)
{
mpfr_set(y, x, GMP_RNDN);
MPFR_MANT(y) [mx] ^= (mp_limb_t) 1 << px;
if (mpfr_eq(y, x, k) ||
!mpfr_eq(y, x, k - 1))
{
fprintf(stderr, "Error in eq.\n");
printf("x = "); mpfr_print_binary(x); printf("\n");
printf("y = "); mpfr_print_binary(y); printf("\n");
printf("k = %ld\n", k);
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));
mpfr_clear(x); mpfr_clear(y);
exit(-1);
}
if (px) { --px; } else { --mx; px = mp_bits_per_limb - 1; }
}
mpfr_clear(y);
}
int
main (void)
{
int j; mpfr_t x;
mpfr_init2 (x, 1000);
for (j=0;j<1000;j++) {
mpfr_random (x);
teq (x);
}
mpfr_clear (x);
return 0;
}
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