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/*
Copyright (C) 2010 Fredrik Johansson
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "fmpz.h"
#include "fmpz_mat.h"
slong
fmpz_mat_rank(const fmpz_mat_t A)
{
fmpz_mat_t tmp;
fmpz_t den;
slong rank;
if (fmpz_mat_is_empty(A))
return 0;
fmpz_mat_init_set(tmp, A);
fmpz_init(den);
if (FLINT_ABS(fmpz_mat_max_bits(tmp)) <= (FLINT_BITS - 4)/2)
rank = fmpz_mat_rank_small_inplace(tmp);
else if (FLINT_MIN(tmp->r, tmp->c) < 25)
rank = fmpz_mat_fflu(tmp, den, NULL, tmp, 0);
else
rank = fmpz_mat_rref(tmp, den, tmp);
fmpz_mat_clear(tmp);
fmpz_clear(den);
return rank;
}