pqc/external/flint-2.4.3/fmpz_vec/test/t-get_set_fft.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) 2009, 2011 William Hart
Copyright (C) 2010 Sebastian Pancratz
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fft.h"
#include "fmpz_vec.h"
#include "ulong_extras.h"
int
main(void)
{
int i, result;
FLINT_TEST_INIT(state);
flint_printf("get/set_fft....");
fflush(stdout);
/* convert back and forth and compare */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz * a, * b;
mp_bitcnt_t bits;
slong len, limbs;
mp_limb_t ** ii, * ptr;
slong i, bt;
bits = n_randint(state, 300) + 1;
len = n_randint(state, 300) + 1;
limbs = 2*((bits - 1)/FLINT_BITS + 1);
ii = flint_malloc((len + len*(limbs + 1))*sizeof(mp_limb_t));
ptr = (mp_limb_t *) ii + len;
for (i = 0; i < len; i++, ptr += (limbs + 1))
ii[i] = ptr;
a = _fmpz_vec_init(len);
b = _fmpz_vec_init(len);
_fmpz_vec_randtest(a, state, len, bits);
bt = _fmpz_vec_get_fft(ii, a, limbs, len);
for (i = 0; i < len; i++)
mpn_normmod_2expp1(ii[i], limbs);
_fmpz_vec_set_fft(b, len, ii, limbs, bt < 0);
result = (_fmpz_vec_equal(a, b, len));
if (!result)
{
flint_printf("FAIL:\n");
_fmpz_vec_print(a, len), flint_printf("\n\n");
_fmpz_vec_print(b, len), flint_printf("\n\n");
abort();
}
flint_free(ii);
_fmpz_vec_clear(a, len);
_fmpz_vec_clear(b, len);
}
/* convert back and forth unsigned and compare */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz * a, * b;
mp_bitcnt_t bits;
slong len, limbs;
mp_limb_t ** ii, * ptr;
slong i, bt;
bits = n_randint(state, 300) + 1;
len = n_randint(state, 300) + 1;
limbs = 2*((bits - 1)/FLINT_BITS + 1);
ii = flint_malloc((len + len*(limbs + 1))*sizeof(mp_limb_t));
ptr = (mp_limb_t *) ii + len;
for (i = 0; i < len; i++, ptr += (limbs + 1))
ii[i] = ptr;
a = _fmpz_vec_init(len);
b = _fmpz_vec_init(len);
_fmpz_vec_randtest_unsigned(a, state, len, bits);
bt = _fmpz_vec_get_fft(ii, a, limbs, len);
_fmpz_vec_set_fft(b, len, ii, limbs, bt < 0);
result = (_fmpz_vec_equal(a, b, len));
if (!result)
{
flint_printf("FAIL:\n");
_fmpz_vec_print(a, len), flint_printf("\n\n");
_fmpz_vec_print(b, len), flint_printf("\n\n");
abort();
}
flint_free(ii);
_fmpz_vec_clear(a, len);
_fmpz_vec_clear(b, len);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}