67 lines
2.1 KiB
C
67 lines
2.1 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 "fmpz_mod_poly.h"
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#include "ulong_extras.h"
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void
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fmpz_mod_poly_factor_equal_deg(fmpz_mod_poly_factor_t factors,
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const fmpz_mod_poly_t pol, slong d)
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{
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if (pol->length == d + 1)
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{
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fmpz_mod_poly_factor_insert(factors, pol, 1);
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}
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else
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{
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fmpz_mod_poly_t f, g, r;
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flint_rand_t state;
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fmpz_mod_poly_init(f, &pol->p);
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flint_randinit(state);
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while (!fmpz_mod_poly_factor_equal_deg_prob(f, state, pol, d))
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{
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};
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flint_randclear(state);
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fmpz_mod_poly_init(g, &pol->p);
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fmpz_mod_poly_init(r, &pol->p);
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fmpz_mod_poly_divrem(g, r, pol, f);
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fmpz_mod_poly_clear(r);
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fmpz_mod_poly_factor_equal_deg(factors, f, d);
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fmpz_mod_poly_clear(f);
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fmpz_mod_poly_factor_equal_deg(factors, g, d);
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fmpz_mod_poly_clear(g);
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}
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}
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