pqc/external/flint-2.4.3/nmod_poly/init2.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) 2007, David Howden.
Copyright (C) 2010 William Hart
******************************************************************************/
#include <gmp.h>
#include <stdlib.h>
#include "flint.h"
#include "ulong_extras.h"
#include "nmod_poly.h"
void
nmod_poly_init2_preinv(nmod_poly_t poly,
mp_limb_t n, mp_limb_t ninv, slong alloc)
{
if (alloc)
poly->coeffs = (mp_ptr) flint_malloc(alloc * sizeof(mp_limb_t));
else
poly->coeffs = NULL;
poly->mod.n = n;
poly->mod.ninv = ninv;
count_leading_zeros(poly->mod.norm, n);
poly->alloc = alloc;
poly->length = 0;
}
void
nmod_poly_init2(nmod_poly_t poly, mp_limb_t n, slong alloc)
{
nmod_poly_init2_preinv(poly, n, n_preinvert_limb(n), alloc);
}