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/* test mpz_congruent_p
Copyright 2001, 2002, 2012, 2014 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 "testutils.h"
#define MPZ_SRCPTR_SWAP(x, y) \
do { \
mpz_srcptr __mpz_srcptr_swap__tmp = (x); \
(x) = (y); \
(y) = __mpz_srcptr_swap__tmp; \
} while (0)
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);
dump (" a", a);
dump (" c", c);
dump (" d", d);
abort ();
}
#if 0
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);
dump (" a", a);
printf (" c=%lu\n", uc);
printf (" d=%lu\n", ud);
abort ();
}
}
#endif
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;
unsigned 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[])
{
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++)
{
mini_urandomb (bs, 32);
size_range = mpz_get_ui (bs) % 13 + 1; /* 0..8192 bit operands */
mini_urandomb (bs, size_range);
size = mpz_get_ui (bs);
mini_rrandomb (a, size);
mini_urandomb (bs, 32);
size_range = mpz_get_ui (bs) % 13 + 1; /* 0..8192 bit operands */
mini_urandomb (bs, size_range);
size = mpz_get_ui (bs);
mini_rrandomb (c, size);
do
{
mini_urandomb (bs, 32);
size_range = mpz_get_ui (bs) % 13 + 1; /* 0..8192 bit operands */
mini_urandomb (bs, size_range);
size = mpz_get_ui (bs);
mini_rrandomb (d, size);
}
while (mpz_sgn(d) == 0);
mini_urandomb (bs, 3);
if (mpz_tstbit (bs, 0))
mpz_neg (a, a);
if (mpz_tstbit (bs, 1))
mpz_neg (c, c);
if (mpz_tstbit (bs, 2))
mpz_neg (d, d);
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);
check_one (a, c, d, 1);
}
mpz_clear (bs);
mpz_clear (a);
mpz_clear (c);
mpz_clear (d);
mpz_clear (ra);
mpz_clear (rc);
}
void
testmain (int argc, char *argv[])
{
check_data ();
check_random (argc, argv);
}
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