145 lines
4.3 KiB
C
145 lines
4.3 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) 2007 David Howden
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Copyright (C) 2007, 2008, 2009, 2010 William Hart
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Copyright (C) 2008 Richard Howell-Peak
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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("factor_squarefree....");
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fflush(stdout);
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for (iter = 0; iter < 300; iter++)
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{
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int result = 1;
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fmpz_mod_poly_t pol1, poly, quot, rem;
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fmpz_mod_poly_factor_t res;
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fmpz_t modulus;
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slong exp[5], prod1;
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slong length, i, j, num;
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fmpz_init_set_ui(modulus, n_randtest_prime(state, 0));
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fmpz_mod_poly_init(pol1, modulus);
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fmpz_mod_poly_init(poly, modulus);
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fmpz_mod_poly_init(quot, modulus);
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fmpz_mod_poly_init(rem, modulus);
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fmpz_mod_poly_zero(pol1);
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fmpz_mod_poly_set_coeff_ui(pol1, 0, 1);
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length = n_randint(state, 7) + 2;
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do
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{
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fmpz_mod_poly_randtest(poly, state, length);
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fmpz_mod_poly_make_monic(poly, poly);
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}
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while ((!fmpz_mod_poly_is_irreducible(poly)) || (poly->length < 2));
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exp[0] = n_randprime(state, 5, 0);
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prod1 = exp[0];
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for (i = 0; i < exp[0]; i++)
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fmpz_mod_poly_mul(pol1, pol1, poly);
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num = n_randint(state, 5) + 1;
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for (i = 1; i < num; i++)
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{
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do
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{
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length = n_randint(state, 7) + 2;
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fmpz_mod_poly_randtest(poly, state, length);
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if (poly->length)
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{
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fmpz_mod_poly_make_monic(poly, poly);
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fmpz_mod_poly_divrem(quot, rem, pol1, poly);
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}
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}
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while ((!fmpz_mod_poly_is_irreducible(poly)) ||
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(poly->length < 2) || (rem->length == 0));
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do
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exp[i] = n_randprime(state, 5, 0);
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while (prod1 % exp[i] == 0);
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prod1 *= exp[i];
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for (j = 0; j < exp[i]; j++)
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fmpz_mod_poly_mul(pol1, pol1, poly);
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}
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fmpz_mod_poly_factor_init(res);
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fmpz_mod_poly_factor_squarefree(res, pol1);
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result &= (res->num == num);
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if (result)
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{
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ulong prod2 = 1;
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for (i = 0; i < num; i++)
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prod2 *= res->exp[i];
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result &= (prod1 == prod2);
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}
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if (!result)
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{
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flint_printf("Error: exp don't match. Modulus = ");
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fmpz_print(modulus);
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flint_printf("\n");
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for (i = 0; i < res->num; i++)
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flint_printf("%wd ", res->exp[i]);
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flint_printf("\n");
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for (i = 0; i < num; i++)
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flint_printf("%wd ", exp[i]);
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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(quot);
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fmpz_mod_poly_clear(rem);
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fmpz_mod_poly_clear(pol1);
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fmpz_mod_poly_clear(poly);
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fmpz_mod_poly_factor_clear(res);
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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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