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

47 lines
1.5 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) 2010 William Hart
******************************************************************************/
#include <gmp.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_vec.h"
slong
_fmpz_vec_max_bits_ref(const fmpz * vec, slong len)
{
slong i, bits, max_bits = 0, sign = 1;
for (i = 0; i < len; i++)
{
bits = fmpz_bits(vec + i);
if (bits > max_bits)
max_bits = bits;
if (fmpz_sgn(vec + i) < 0)
sign = WORD(-1);
}
return max_bits * sign;
}