100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2011 Fredrik Johansson
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Copyright (C) 2012 Lina Kulakova
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "fmpz_vec.h"
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#include "fmpz_mod_poly.h"
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#include "ulong_extras.h"
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int
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main(void)
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{
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int iter;
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FLINT_TEST_INIT(state);
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flint_printf("is_irreducible_ddf....");
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fflush(stdout);
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for (iter = 0; iter < 100; iter++)
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{
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fmpz_mod_poly_t poly1, poly2;
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fmpz_t modulus;
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slong length;
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int i, num;
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fmpz_init_set_ui(modulus, n_randtest_prime(state, 0));
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fmpz_mod_poly_init(poly1, modulus);
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fmpz_mod_poly_init(poly2, modulus);
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length = n_randint(state, 10) + 2;
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do
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{
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fmpz_mod_poly_randtest(poly1, state, length);
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if (!fmpz_mod_poly_is_zero(poly1))
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fmpz_mod_poly_make_monic(poly1, poly1);
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}
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while ((!fmpz_mod_poly_is_irreducible_ddf(poly1)) || (poly1->length < 2));
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num = n_randint(state, 5) + 1;
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for (i = 0; i < num; i++)
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{
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do
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{
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fmpz_mod_poly_randtest(poly2, state, length);
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if (!fmpz_mod_poly_is_zero(poly1))
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fmpz_mod_poly_make_monic(poly2, poly2);
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}
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while ((!fmpz_mod_poly_is_irreducible_ddf(poly2)) || (poly2->length < 2));
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fmpz_mod_poly_mul(poly1, poly1, poly2);
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}
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if (fmpz_mod_poly_is_irreducible_ddf(poly1))
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{
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flint_printf("Error: reducible polynomial declared irreducible!\n");
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flint_printf("poly:\n");
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fmpz_mod_poly_print(poly1);
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flint_printf("\n");
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abort();
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}
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fmpz_clear(modulus);
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fmpz_mod_poly_clear(poly1);
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fmpz_mod_poly_clear(poly2);
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}
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FLINT_TEST_CLEANUP(state);
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flint_printf("PASS\n");
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return 0;
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}
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