pqc/external/flint-2.4.3/fmpz_factor/extend_factor_ui.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) 2008, 2009 William Hart
Copyright (C) 2010 Fredrik Johansson
******************************************************************************/
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_vec.h"
#include "ulong_extras.h"
void
_fmpz_factor_extend_factor_ui(fmpz_factor_t factor, mp_limb_t n)
{
slong i, len;
n_factor_t nfac;
if (n == 0)
{
_fmpz_factor_set_length(factor, 0);
factor->sign = 0;
return;
}
n_factor_init(&nfac);
n_factor(&nfac, n, 0);
len = factor->num;
_fmpz_factor_fit_length(factor, len + nfac.num);
_fmpz_factor_set_length(factor, len + nfac.num);
for (i = 0; i < nfac.num; i++)
{
fmpz_set_ui(factor->p + len + i, nfac.p[i]);
factor->exp[len + i] = nfac.exp[i];
}
}