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

50 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 Fredrik Johansson
******************************************************************************/
#include <stdlib.h>
#include "flint.h"
#include "fmpz.h"
#include "fmpz_poly.h"
#include "fmpz_poly_mat.h"
slong
fmpz_poly_mat_rank(const fmpz_poly_mat_t A)
{
fmpz_poly_mat_t tmp;
fmpz_poly_t den;
slong rank;
if (fmpz_poly_mat_is_empty(A))
return 0;
fmpz_poly_mat_init_set(tmp, A);
fmpz_poly_init(den);
rank = fmpz_poly_mat_fflu(tmp, den, NULL, tmp, 0);
fmpz_poly_mat_clear(tmp);
fmpz_poly_clear(den);
return rank;
}