pqc/external/flint-2.4.3/fmpq_poly/shift_left.c
2014-05-24 23:16:06 +02:00

53 lines
1.6 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) 2010 Sebastian Pancratz
******************************************************************************/
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_poly.h"
#include "fmpq_poly.h"
void
fmpq_poly_shift_left(fmpq_poly_t res, const fmpq_poly_t poly, slong n)
{
if (n == 0)
{
fmpq_poly_set(res, poly);
return;
}
if (poly->length == 0)
{
fmpq_poly_zero(res);
return;
}
fmpq_poly_fit_length(res, poly->length + n);
_fmpz_poly_shift_left(res->coeffs, poly->coeffs, poly->length, n);
fmpz_set(res->den, poly->den);
_fmpq_poly_set_length(res, poly->length + n);
}