pqc/external/flint-2.4.3/nmod_poly/interpolate_nmod_vec.c

62 lines
2.0 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) 2011 Fredrik Johansson
******************************************************************************/
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
#include "nmod_vec.h"
#include "nmod_poly.h"
void
_nmod_poly_interpolate_nmod_vec(mp_ptr poly,
mp_srcptr xs, mp_srcptr ys, slong n, nmod_t mod)
{
if (n < 6)
_nmod_poly_interpolate_nmod_vec_newton(poly, xs, ys, n, mod);
else if (n < 16)
_nmod_poly_interpolate_nmod_vec_barycentric(poly, xs, ys, n, mod);
else
_nmod_poly_interpolate_nmod_vec_fast(poly, xs, ys, n, mod);
}
void
nmod_poly_interpolate_nmod_vec(nmod_poly_t poly,
mp_srcptr xs, mp_srcptr ys, slong n)
{
if (n == 0)
{
nmod_poly_zero(poly);
}
else
{
nmod_poly_fit_length(poly, n);
poly->length = n;
_nmod_poly_interpolate_nmod_vec(poly->coeffs,
xs, ys, n, poly->mod);
_nmod_poly_normalise(poly);
}
}