/* test mpz_congruent_p and mpz_congruent_ui_p
Copyright 2001 , 2002 , 2012 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 a, mpz_srcptr c, mpz_srcptr d,
int want)
{
int got;
int swap;
for (swap =
0 ; swap <=
1 ; swap++)
{
got = (mpz_congruent_p (a, c, d) !=
0 );
if (want != got)
{
printf (
"mpz_congruent_p wrong\n" );
printf (
" expected %d got %d\n" , want, got);
mpz_trace (
" a" , a);
mpz_trace (
" c" , c);
mpz_trace (
" d" , d);
mp_trace_base = -
16 ;
mpz_trace (
" a" , a);
mpz_trace (
" c" , c);
mpz_trace (
" d" , d);
abort ();
}
if (mpz_fits_ulong_p (c) && mpz_fits_ulong_p (d))
{
unsigned long uc = mpz_get_ui (c);
unsigned long ud = mpz_get_ui (d);
got = (mpz_congruent_ui_p (a, uc, ud) !=
0 );
if (want != got)
{
printf (
"mpz_congruent_ui_p wrong\n" );
printf (
" expected %d got %d\n" , want, got);
mpz_trace (
" a" , a);
printf (
" c=%lu\n" , uc);
printf (
" d=%lu\n" , ud);
mp_trace_base = -
16 ;
mpz_trace (
" a" , a);
printf (
" c=0x%lX\n" , uc);
printf (
" d=0x%lX\n" , ud);
abort ();
}
}
MPZ_SRCPTR_SWAP (a, c);
}
}
void
check_data (
void )
{
static const struct {
const char *a;
const char *c;
const char *d;
int want;
} data[] = {
/* strict equality mod 0 */
{
"0" ,
"0" ,
"0" ,
1 },
{
"11" ,
"11" ,
"0" ,
1 },
{
"3" ,
"11" ,
"0" ,
0 },
/* anything congruent mod 1 */
{
"0" ,
"0" ,
"1" ,
1 },
{
"1" ,
"0" ,
"1" ,
1 },
{
"0" ,
"1" ,
"1" ,
1 },
{
"123" ,
"456" ,
"1" ,
1 },
{
"0x123456789123456789" ,
"0x987654321987654321" ,
"1" ,
1 },
/* csize==1, dsize==2 changing to 1 after stripping 2s */
{
"0x3333333333333333" ,
"0x33333333" ,
"0x180000000" ,
1 },
{
"0x33333333333333333333333333333333" ,
"0x3333333333333333" ,
"0x18000000000000000" ,
1 },
/* another dsize==2 becoming 1, with opposite signs this time */
{
"0x444444441" ,
"-0x22222221F" ,
"0x333333330" ,
1 },
{
"0x44444444444444441" ,
"-0x2222222222222221F" ,
"0x33333333333333330" ,
1 },
};
mpz_t a, c, d;
int i;
mpz_init (a);
mpz_init (c);
mpz_init (d);
for (i =
0 ; i < numberof (data); i++)
{
mpz_set_str_or_abort (a, data[i].a,
0 );
mpz_set_str_or_abort (c, data[i].c,
0 );
mpz_set_str_or_abort (d, data[i].d,
0 );
check_one (a, c, d, data[i].want);
}
mpz_clear (a);
mpz_clear (c);
mpz_clear (d);
}
void
check_random (
int argc,
char *argv[])
{
gmp_randstate_ptr rands = RANDS;
mpz_t a, c, d, ra, rc;
int i;
int want;
int reps =
10000 ;
mpz_t bs;
unsigned long size_range, size;
if (argc >=
2 )
reps = atoi (argv[
1 ]);
mpz_init (bs);
mpz_init (a);
mpz_init (c);
mpz_init (d);
mpz_init (ra);
mpz_init (rc);
for (i =
0 ; i < reps; i++)
{
mpz_urandomb (bs, rands,
32 );
size_range = mpz_get_ui (bs) %
16 +
1 ;
/* 0..65536 bit operands */
mpz_urandomb (bs, rands, size_range);
size = mpz_get_ui (bs);
mpz_rrandomb (a, rands, size);
mpz_urandomb (bs, rands,
32 );
size_range = mpz_get_ui (bs) %
16 +
1 ;
/* 0..65536 bit operands */
mpz_urandomb (bs, rands, size_range);
size = mpz_get_ui (bs);
mpz_rrandomb (c, rands, size);
do
{
mpz_urandomb (bs, rands,
32 );
size_range = mpz_get_ui (bs) %
16 +
1 ;
/* 0..65536 bit operands */
mpz_urandomb (bs, rands, size_range);
size = mpz_get_ui (bs);
mpz_rrandomb (d, rands, size);
}
while (SIZ(d) ==
0 );
mpz_negrandom (a, rands);
MPZ_CHECK_FORMAT (a);
mpz_negrandom (c, rands);
MPZ_CHECK_FORMAT (c);
mpz_negrandom (d, rands);
mpz_fdiv_r (ra, a, d);
mpz_fdiv_r (rc, c, d);
want = (mpz_cmp (ra, rc) ==
0 );
check_one (a, c, d, want);
mpz_sub (ra, ra, rc);
mpz_sub (a, a, ra);
MPZ_CHECK_FORMAT (a);
check_one (a, c, d,
1 );
if (! mpz_pow2abs_p (d))
{
refmpz_combit (a, urandom() % (
8 *GMP_LIMB_BITS));
check_one (a, c, d,
0 );
}
}
mpz_clear (bs);
mpz_clear (a);
mpz_clear (c);
mpz_clear (d);
mpz_clear (ra);
mpz_clear (rc);
}
int
main (
int argc,
char *argv[])
{
tests_start ();
check_data ();
check_random (argc, argv);
tests_end ();
exit (
0 );
}
Messung V0.5 in Prozent C=92 H=97 G=94
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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