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/* Test mpf_set, mpf_init_set.
Copyright 2004, 2012 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP 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 3 of the License, or (at your
option) any later version.
The GNU MP 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 GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"
void
check_reuse (void)
{
/* Try mpf_set(f,f) when f is bigger than prec. In the past this had
resulted in an MPN_COPY with invalid operand overlap. */
mpf_t f;
mp_size_t limbs = 20;
unsigned long bits = limbs * GMP_NUMB_BITS;
mpf_init2 (f, bits);
refmpf_fill (f, limbs, GMP_NUMB_MAX);
mpf_set_prec_raw (f, bits / 2);
mpf_set (f, f);
MPF_CHECK_FORMAT (f);
mpf_set_prec_raw (f, bits);
mpf_clear (f);
}
void
check_random (long reps)
{
unsigned long test;
gmp_randstate_ptr rands;
mpf_t a, b;
mpz_t z;
int precbits;
#define PRECBITS 10
rands = RANDS;
mpz_init (z);
mpf_init2 (a, 1 << PRECBITS);
for (test = 0; test < reps; test++)
{
mpz_urandomb (z, rands, PRECBITS);
precbits = mpz_get_ui (z) + 1;
mpz_urandomb (z, rands, precbits);
mpz_setbit (z, precbits - 1); /* make sure msb is set */
mpf_set_z (a, z);
mpz_urandomb (z, rands, PRECBITS);
mpf_div_2exp (a, a, mpz_get_ui (z) + 1);
mpz_urandomb (z, rands, PRECBITS);
precbits -= mpz_get_ui (z);
if (precbits <= 0)
precbits = 1 - precbits;
mpf_set_default_prec (precbits);
mpf_init_set (b, a);
MPF_CHECK_FORMAT (b);
if (!mpf_eq (a, b, precbits))
{
printf ("mpf_init_set wrong.\n");
abort();
}
mpf_set_ui (b, 0);
mpf_set (b, a);
MPF_CHECK_FORMAT (b);
if (!mpf_eq (a, b, precbits))
{
printf ("mpf_set wrong.\n");
abort();
}
mpf_clear (b);
}
mpf_clear (a);
mpz_clear (z);
}
int
main (int argc, char *argv[])
{
long reps = 10000;
if (argc == 2)
reps = strtol (argv[1], 0, 0);
tests_start ();
check_reuse ();
check_random (reps);
tests_end ();
exit (0);
}
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