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/* Test mpz_set_f.
Copyright 2001 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_one (mpz_srcptr z)
{
static const int shift[] = {
0, 1, BITS_PER_MP_LIMB, 2*BITS_PER_MP_LIMB, 5*BITS_PER_MP_LIMB
};
int sh, shneg, neg;
mpf_t f;
mpz_t got, want;
mpf_init2 (f, mpz_sizeinbase(z,2));
mpz_init (got);
mpz_init (want);
for (sh = 0; sh < numberof(shift); sh++)
{
for (shneg = 0; shneg <= 1; shneg++)
{
for (neg = 0; neg <= 1; neg++)
{
mpf_set_z (f, z);
mpz_set (want, z);
if (neg)
{
mpf_neg (f, f);
mpz_neg (want, want);
}
if (shneg)
{
mpz_tdiv_q_2exp (want, want, shift[sh]);
mpf_div_2exp (f, f, shift[sh]);
}
else
{
mpz_mul_2exp (want, want, shift[sh]);
mpf_mul_2exp (f, f, shift[sh]);
}
mpz_set_f (got, f);
MPZ_CHECK_FORMAT (got);
if (mpz_cmp (got, want) != 0)
{
printf ("wrong result\n");
printf (" shift %d\n", shneg ? -shift[sh] : shift[sh]);
printf (" neg %d\n", neg);
mpf_trace (" f", f);
mpz_trace (" got", got);
mpz_trace (" want", want);
abort ();
}
}
}
}
mpf_clear (f);
mpz_clear (got);
mpz_clear (want);
}
void
check_various (void)
{
mpz_t z;
mpz_init (z);
mpz_set_ui (z, 0L);
check_one (z);
mpz_set_si (z, 123L);
check_one (z);
mpz_rrandomb (z, RANDS, 2*BITS_PER_MP_LIMB);
check_one (z);
mpz_rrandomb (z, RANDS, 5*BITS_PER_MP_LIMB);
check_one (z);
mpz_clear (z);
}
int
main (int argc, char *argv[])
{
#if GMP_NAIL_BITS == 0
tests_start ();
mp_trace_base = 16;
check_various ();
tests_end ();
#endif
exit (0);
}
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