pqc/external/flint-2.4.3/fmpz/test/t-gcdinv.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("gcdinv....");
fflush(stdout);
/* Test aliasing of d and f, a and g */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_t d, a, f, g, F, G;
fmpz_init(d);
fmpz_init(a);
fmpz_init(f);
fmpz_init(g);
fmpz_init(F);
fmpz_init(G);
fmpz_randtest_unsigned(G, state, 200);
fmpz_add_ui(G, G, 1);
fmpz_randm(F, state, G);
fmpz_set(f, F);
fmpz_set(g, G);
fmpz_gcdinv(d, a, f, g);
fmpz_gcdinv(f, g, f, g);
result = (fmpz_equal(d, f) && (fmpz_equal(a, g) || fmpz_is_zero(F)));
if (!result)
{
flint_printf("FAIL:\n\n");
flint_printf("d = "), fmpz_print(d), flint_printf("\n");
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
flint_printf("f = "), fmpz_print(f), flint_printf("\n");
flint_printf("g = "), fmpz_print(g), flint_printf("\n");
flint_printf("F = "), fmpz_print(F), flint_printf("\n");
flint_printf("G = "), fmpz_print(G), flint_printf("\n");
abort();
}
fmpz_clear(d);
fmpz_clear(a);
fmpz_clear(f);
fmpz_clear(g);
fmpz_clear(F);
fmpz_clear(G);
}
/* Test aliasing of a and f, d and g */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_t d, a, f, g, F, G;
fmpz_init(d);
fmpz_init(a);
fmpz_init(f);
fmpz_init(g);
fmpz_init(F);
fmpz_init(G);
fmpz_randtest_unsigned(G, state, 200);
fmpz_add_ui(G, G, 1);
fmpz_randm(F, state, G);
fmpz_set(f, F);
fmpz_set(g, G);
fmpz_gcdinv(d, a, f, g);
fmpz_gcdinv(g, f, f, g);
result = (fmpz_equal(d, g) && (fmpz_equal(a, f) || fmpz_is_zero(F)));
if (!result)
{
flint_printf("FAIL:\n\n");
flint_printf("d = "), fmpz_print(d), flint_printf("\n");
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
flint_printf("f = "), fmpz_print(f), flint_printf("\n");
flint_printf("g = "), fmpz_print(g), flint_printf("\n");
flint_printf("F = "), fmpz_print(F), flint_printf("\n");
flint_printf("G = "), fmpz_print(G), flint_printf("\n");
abort();
}
fmpz_clear(d);
fmpz_clear(a);
fmpz_clear(f);
fmpz_clear(g);
fmpz_clear(F);
fmpz_clear(G);
}
/* Test a f == d mod g (generically d == 1) */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_t d, a, f, g, t;
fmpz_init(d);
fmpz_init(a);
fmpz_init(f);
fmpz_init(g);
fmpz_init(t);
fmpz_randtest_unsigned(g, state, 200);
fmpz_add_ui(g, g, 1);
fmpz_randm(f, state, g);
fmpz_gcdinv(d, a, f, g);
fmpz_mul(t, a, f);
fmpz_mod(t, t, g);
result = (fmpz_equal(t, d) || fmpz_is_zero(f));
if (!result)
{
flint_printf("FAIL:\n\n");
flint_printf("d = "), fmpz_print(d), flint_printf("\n");
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
flint_printf("f = "), fmpz_print(f), flint_printf("\n");
flint_printf("g = "), fmpz_print(g), flint_printf("\n");
flint_printf("t = "), fmpz_print(t), flint_printf("\n");
abort();
}
fmpz_clear(d);
fmpz_clear(a);
fmpz_clear(f);
fmpz_clear(g);
fmpz_clear(t);
}
/* Test a f == d mod g (specifically d > 1) */
for (i = 0; i < 1000 * flint_test_multiplier(); i++)
{
fmpz_t d, a, f, g, t, x;
fmpz_init(d);
fmpz_init(a);
fmpz_init(f);
fmpz_init(g);
fmpz_init(t);
fmpz_init(x);
fmpz_randtest_unsigned(g, state, 200);
fmpz_add_ui(g, g, 1);
fmpz_randm(f, state, g);
fmpz_randtest_unsigned(x, state, 100);
fmpz_add_ui(x, x, 1);
fmpz_mul(f, f, x);
fmpz_mul(g, g, x);
fmpz_gcdinv(d, a, f, g);
fmpz_mul(t, a, f);
fmpz_mod(t, t, g);
result = (fmpz_equal(t, d) || fmpz_is_zero(f));
if (!result)
{
flint_printf("FAIL:\n\n");
flint_printf("d = "), fmpz_print(d), flint_printf("\n");
flint_printf("a = "), fmpz_print(a), flint_printf("\n");
flint_printf("f = "), fmpz_print(f), flint_printf("\n");
flint_printf("g = "), fmpz_print(g), flint_printf("\n");
flint_printf("t = "), fmpz_print(t), flint_printf("\n");
flint_printf("x = "), fmpz_print(x), flint_printf("\n");
abort();
}
fmpz_clear(d);
fmpz_clear(a);
fmpz_clear(f);
fmpz_clear(g);
fmpz_clear(t);
fmpz_clear(x);
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}