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

79 lines
2.3 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) 2008, 2009 William Hart
Copyright (C) 2010, 2012 Sebastian Pancratz
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#ifdef T
#include "templates.h"
void
_TEMPLATE(T, poly_shift_left) (TEMPLATE(T, struct) * rop,
const TEMPLATE(T, struct) * op, slong len,
slong n, const TEMPLATE(T, ctx_t) ctx)
{
slong i;
if (rop != op)
{
for (i = len; i--;)
TEMPLATE(T, set) (rop + n + i, op + i, ctx);
}
else
{
for (i = len; i--;)
TEMPLATE(T, swap) (rop + n + i, rop + i, ctx);
}
for (i = 0; i < n; i++)
TEMPLATE(T, zero) (rop + i, ctx);
}
void
TEMPLATE(T, poly_shift_left) (TEMPLATE(T, poly_t) rop,
const TEMPLATE(T, poly_t) op, slong n,
const TEMPLATE(T, ctx_t) ctx)
{
if (n == 0)
{
TEMPLATE(T, poly_set) (rop, op, ctx);
}
else if (TEMPLATE(T, poly_is_zero) (op, ctx))
{
TEMPLATE(T, poly_zero) (rop, ctx);
}
else
{
TEMPLATE(T, poly_fit_length) (rop, op->length + n, ctx);
_TEMPLATE(T, poly_shift_left) (rop->coeffs, op->coeffs, op->length, n,
ctx);
_TEMPLATE(T, poly_set_length) (rop, op->length + n, ctx);
}
}
#endif