67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
|
/*=============================================================================
|
||
|
|
||
|
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) 2007 David Howden
|
||
|
Copyright (C) 2007, 2008, 2009, 2010 William Hart
|
||
|
Copyright (C) 2008 Richard Howell-Peak
|
||
|
Copyright (C) 2011 Fredrik Johansson
|
||
|
Copyright (C) 2012 Lina Kulakova
|
||
|
|
||
|
******************************************************************************/
|
||
|
|
||
|
#include "fmpz_mod_poly.h"
|
||
|
#include "ulong_extras.h"
|
||
|
|
||
|
void
|
||
|
fmpz_mod_poly_factor_equal_deg(fmpz_mod_poly_factor_t factors,
|
||
|
const fmpz_mod_poly_t pol, slong d)
|
||
|
{
|
||
|
if (pol->length == d + 1)
|
||
|
{
|
||
|
fmpz_mod_poly_factor_insert(factors, pol, 1);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
fmpz_mod_poly_t f, g, r;
|
||
|
flint_rand_t state;
|
||
|
|
||
|
fmpz_mod_poly_init(f, &pol->p);
|
||
|
|
||
|
flint_randinit(state);
|
||
|
|
||
|
while (!fmpz_mod_poly_factor_equal_deg_prob(f, state, pol, d))
|
||
|
{
|
||
|
};
|
||
|
|
||
|
flint_randclear(state);
|
||
|
|
||
|
fmpz_mod_poly_init(g, &pol->p);
|
||
|
fmpz_mod_poly_init(r, &pol->p);
|
||
|
fmpz_mod_poly_divrem(g, r, pol, f);
|
||
|
fmpz_mod_poly_clear(r);
|
||
|
|
||
|
fmpz_mod_poly_factor_equal_deg(factors, f, d);
|
||
|
fmpz_mod_poly_clear(f);
|
||
|
fmpz_mod_poly_factor_equal_deg(factors, g, d);
|
||
|
fmpz_mod_poly_clear(g);
|
||
|
}
|
||
|
}
|