pqc/external/flint-2.4.3/fmpz_poly/hensel_lift_once.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) 2011 Andy Novocin
Copyright (C) 2011 William Hart
Copyright (C) 2011 Sebastian Pancratz
******************************************************************************/
#include "flint.h"
#include "fmpz_poly.h"
#include "nmod_poly.h"
void fmpz_poly_hensel_lift_once(fmpz_poly_factor_t lifted_fac,
const fmpz_poly_t f,
const nmod_poly_factor_t local_fac, slong N)
{
const slong r = local_fac->num;
slong i;
slong *link;
fmpz_poly_t *v, *w;
link = flint_malloc((2*r - 2) * sizeof(slong));
v = flint_malloc(2*(2*r - 2) * sizeof(fmpz_poly_t));
w = v + (2*r - 2);
for(i = 0; i < 2*r - 2; i++)
{
fmpz_poly_init(v[i]);
fmpz_poly_init(w[i]);
}
_fmpz_poly_hensel_start_lift(lifted_fac, link, v, w, f, local_fac, N);
for (i = 0; i < 2*r - 2; i++)
{
fmpz_poly_clear(v[i]);
fmpz_poly_clear(w[i]);
}
flint_free(link);
flint_free(v);
}