/* Test mpz_set_f.
Copyright 2001 Free Software Foundation , Inc .
This file is part of the GNU MP Library test suite .
The GNU MP Library test suite is free software ; you can redistribute it
and / or modify it under the terms of the GNU 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 test suite 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 General
Public License for more details .
You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp-impl.h"
#include "tests.h"
void
check_one (mpz_srcptr z)
{
static const int shift[] = {
0 ,
1 , GMP_LIMB_BITS,
2 *GMP_LIMB_BITS,
5 *GMP_LIMB_BITS
};
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,
0 L);
check_one (z);
mpz_set_si (z,
123 L);
check_one (z);
mpz_rrandomb (z, RANDS,
2 *GMP_LIMB_BITS);
check_one (z);
mpz_rrandomb (z, RANDS,
5 *GMP_LIMB_BITS);
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 );
}
Messung V0.5 in Prozent C=95 H=92 G=93
¤ Dauer der Verarbeitung: 0.2 Sekunden
¤
*© Formatika GbR, Deutschland