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

97 lines
2.5 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) 2011 Fredrik Johansson
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <gmp.h>
#include "flint.h"
#include "nmod_mat.h"
#include "nmod_vec.h"
#include "ulong_extras.h"
int
main(void)
{
slong m, n, mod, rep;
FLINT_TEST_INIT(state);
flint_printf("scalar_mul....");
fflush(stdout);
for (rep = 0; rep < 1000 * flint_test_multiplier(); rep++)
{
nmod_mat_t A, B, C, D;
mp_limb_t c;
m = n_randint(state, 20);
n = n_randint(state, 20);
mod = n_randtest_not_zero(state);
c = n_randint(state, mod);
nmod_mat_init(A, m, n, mod);
nmod_mat_init(B, m, n, mod);
nmod_mat_init(C, m, n, mod);
nmod_mat_init(D, m, n, mod);
nmod_mat_randtest(A, state);
nmod_mat_randtest(B, state);
nmod_mat_scalar_mul(C, A, c);
nmod_mat_scalar_mul(D, A, nmod_sub(c, UWORD(1), A->mod));
/* c*A - (c-1)*A == A */
nmod_mat_sub(D, C, D);
if (!nmod_mat_equal(A, D))
{
flint_printf("FAIL\n");
abort();
}
/* Aliasing */
nmod_mat_scalar_mul(C, A, c);
nmod_mat_scalar_mul(A, A, c);
if (!nmod_mat_equal(A, C))
{
flint_printf("FAIL\n");
abort();
}
nmod_mat_clear(A);
nmod_mat_clear(B);
nmod_mat_clear(C);
nmod_mat_clear(D);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}