pqc/external/flint-2.4.3/nmod_poly/test/t-deflate.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
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 <gmp.h>
#include "flint.h"
#include "nmod_vec.h"
#include "nmod_poly.h"
#include "ulong_extras.h"
int
main(void)
{
int iter;
FLINT_TEST_INIT(state);
flint_printf("deflate....");
fflush(stdout);
for (iter = 0; iter < 100 * flint_test_multiplier(); iter++)
{
nmod_poly_t poly1, poly2, poly3;
mp_limb_t modulus;
ulong infl1, infl, deflation;
modulus = n_randtest_prime(state, 0);
nmod_poly_init(poly1, modulus);
nmod_poly_init(poly2, modulus);
nmod_poly_init(poly3, modulus);
nmod_poly_randtest(poly1, state, n_randint(state, 15));
if (nmod_poly_length(poly1) <= 1)
{
if (nmod_poly_deflation(poly1) != nmod_poly_length(poly1))
{
flint_printf("FAIL: wrong deflation for constant polynomial\n");
abort();
}
nmod_poly_deflate(poly2, poly1, n_randint(state, 5) + 1);
if (!nmod_poly_equal(poly2, poly1))
{
flint_printf("FAIL: constant polynomial changed on deflation\n");
abort();
}
}
else
{
infl = n_randint(state, 13) + 1;
infl1 = nmod_poly_deflation(poly1);
nmod_poly_inflate(poly2, poly1, infl);
deflation = nmod_poly_deflation(poly2);
if (deflation != infl * infl1)
{
flint_printf("FAIL: deflation = %wu, inflation: %wu, %wu\n",
deflation, infl, infl1);
flint_printf("poly1:\n"); nmod_poly_print(poly1); flint_printf("\n\n");
flint_printf("poly2:\n"); nmod_poly_print(poly2); flint_printf("\n\n");
abort();
}
nmod_poly_deflate(poly3, poly2, infl);
if (!nmod_poly_equal(poly3, poly1))
{
flint_printf("FAIL: deflation = %wu, inflation: %wu, %wu\n",
deflation, infl, infl1);
flint_printf("Deflated polynomial not equal to input:\n");
flint_printf("poly1:\n"); nmod_poly_print(poly1); flint_printf("\n\n");
flint_printf("poly2:\n"); nmod_poly_print(poly2); flint_printf("\n\n");
flint_printf("poly3:\n"); nmod_poly_print(poly2); flint_printf("\n\n");
abort();
}
nmod_poly_deflate(poly2, poly2, infl);
if (!nmod_poly_equal(poly3, poly2))
{
flint_printf("FAIL: aliasing\n");
abort();
}
}
nmod_poly_clear(poly1);
nmod_poly_clear(poly2);
nmod_poly_clear(poly3);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}