pqc/external/flint-2.4.3/fq_poly_templates/inflate.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
Copyright (C) 2011 Fredrik Johansson
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#ifdef T
#include "templates.h"
void
TEMPLATE(T, poly_inflate) (TEMPLATE(T, poly_t) result,
const TEMPLATE(T, poly_t) input, ulong inflation,
const TEMPLATE(T, ctx_t) ctx)
{
if (input->length <= 1 || inflation == 1)
{
TEMPLATE(T, poly_set) (result, input, ctx);
}
else if (inflation == 0)
{
TEMPLATE(T, t) v;
TEMPLATE(T, init) (v, ctx);
TEMPLATE(T, one) (v, ctx);
TEMPLATE(T, TEMPLATE(poly_evaluate, T)) (v, input, v, ctx);
TEMPLATE(T, poly_zero) (result, ctx);
TEMPLATE(T, poly_set_coeff) (result, 0, v, ctx);
TEMPLATE(T, clear) (v, ctx);
}
else
{
slong i, j, res_length = (input->length - 1) * inflation + 1;
TEMPLATE(T, poly_fit_length) (result, res_length, ctx);
for (i = input->length - 1; i > 0; i--)
{
TEMPLATE(T, set) (result->coeffs + (i * inflation),
input->coeffs + i, ctx);
for (j = i * inflation - 1; j > (i - 1) * inflation; j--)
TEMPLATE(T, zero) (result->coeffs + j, ctx);
}
TEMPLATE(T, set) (result->coeffs, input->coeffs, ctx);
result->length = res_length;
}
}
#endif