pqc/external/flint-2.4.3/fmpz_vec/test/t-lcm.c
2014-05-24 23:16:06 +02:00

94 lines
2.4 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT 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 2 of the License, or
(at your option) any later version.
FLINT 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 FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2009 William Hart
Copyright (C) 2010 Sebastian Pancratz
Copyright (C) 2011 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_vec.h"
#include "ulong_extras.h"
int
main(void)
{
int i, result;
FLINT_TEST_INIT(state);
flint_printf("lcm....");
fflush(stdout);
/* Check that lcm(a f) = abs(a) lcm(f) */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_t a, c, d;
fmpz *f;
slong len = n_randint(state, 100);
fmpz_init(a);
fmpz_init(c);
fmpz_init(d);
f = _fmpz_vec_init(len);
_fmpz_vec_randtest(f, state, len, 200);
fmpz_randtest(a, state, 100);
_fmpz_vec_lcm(c, f, len);
if (len == 0)
{
result = fmpz_is_one(c);
}
else
{
_fmpz_vec_scalar_mul_fmpz(f, f, len, a);
fmpz_abs(a, a);
fmpz_mul(c, a, c);
_fmpz_vec_lcm(d, f, len);
result = (fmpz_equal(c, d));
}
if (!result)
{
fmpz_print(c), flint_printf("\n\n");
fmpz_print(d), flint_printf("\n\n");
abort();
}
fmpz_clear(a);
fmpz_clear(c);
fmpz_clear(d);
_fmpz_vec_clear(f, len);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}