pqc/external/flint-2.4.3/nmod_poly/shift_left.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) 2010 William Hart
******************************************************************************/
#include <gmp.h>
#include "flint.h"
#include "nmod_vec.h"
#include "nmod_poly.h"
void _nmod_poly_shift_left(mp_ptr res, mp_srcptr poly, slong len, slong k)
{
flint_mpn_copyd(res + k, poly, len);
flint_mpn_zero(res, k);
}
void nmod_poly_shift_left(nmod_poly_t res, const nmod_poly_t poly, slong k)
{
nmod_poly_fit_length(res, poly->length + k);
_nmod_poly_shift_left(res->coeffs, poly->coeffs, poly->length, k);
res->length = poly->length + k;
}