pqc/external/flint-2.4.3/fmpz/test/t-xgcd_partial.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 William Hart
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
#include "fmpz.h"
int
main(void)
{
int i, result;
FLINT_TEST_INIT(state);
flint_printf("xgcd_partial....");
fflush(stdout);
/* Test co2*r1 - co1*r2 = r2_orig */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_t co1, co2, f, g, t1, t2, L;
fmpz_init(co1);
fmpz_init(co2);
fmpz_init(f);
fmpz_init(g);
fmpz_init(L);
fmpz_init(t1);
fmpz_init(t2);
fmpz_randtest_unsigned(g, state, 200);
fmpz_add_ui(g, g, 1);
fmpz_randm(f, state, g);
fmpz_randtest_unsigned(L, state, 200);
fmpz_set(t2, g);
fmpz_abs(t2, t2);
fmpz_xgcd_partial(co2, co1, g, f, L);
fmpz_mul(t1, co2, f);
fmpz_submul(t1, co1, g);
fmpz_abs(t1, t1);
result = fmpz_equal(t1, t2);
if (!result)
{
flint_printf("FAIL:\n\n");
flint_printf("co1 = "), fmpz_print(co1), flint_printf("\n");
flint_printf("co2 = "), fmpz_print(co2), flint_printf("\n");
flint_printf("f = "), fmpz_print(f), flint_printf("\n");
flint_printf("g = "), fmpz_print(g), flint_printf("\n");
flint_printf("L = "), fmpz_print(L), flint_printf("\n");
flint_printf("t1 = "), fmpz_print(t1), flint_printf("\n");
flint_printf("t2 = "), fmpz_print(t2), flint_printf("\n");
abort();
}
fmpz_clear(co1);
fmpz_clear(co2);
fmpz_clear(f);
fmpz_clear(g);
fmpz_clear(L);
fmpz_clear(t1);
fmpz_clear(t2);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}