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

55 lines
1.7 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) 2011, 2012 Sebastian Pancratz
******************************************************************************/
#include "padic.h"
void _padic_reduce(padic_t rop, const padic_ctx_t ctx)
{
if (!fmpz_is_zero(padic_unit(rop)))
{
if (padic_val(rop) < padic_prec(rop))
{
int c;
fmpz_t pow;
c = _padic_ctx_pow_ui(pow, padic_prec(rop) - padic_val(rop), ctx);
fmpz_mod(padic_unit(rop), padic_unit(rop), pow);
if (c)
fmpz_clear(pow);
}
else
{
padic_zero(rop);
}
}
}
void padic_reduce(padic_t rop, const padic_ctx_t ctx)
{
_padic_canonicalise(rop, ctx);
_padic_reduce(rop, ctx);
}