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

42 lines
1.4 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_shift(padic_t rop, const padic_t op, slong v, const padic_ctx_t ctx)
{
if (padic_is_zero(op) || (padic_val(op) + v >= padic_prec(rop)))
{
padic_zero(rop);
}
else
{
fmpz_set(padic_unit(rop), padic_unit(op));
padic_val(rop) = padic_val(op) + v;
_padic_reduce(rop, ctx);
}
}