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/*
Copyright (C) 2023 Albin Ahlbäck
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 "fmpq.h"
#include "fmpq_mat.h"
void fmpq_mat_invert_rows(fmpq_mat_t mat, slong * perm)
{
slong i;
for (i = 0; i < mat->r/2; i++)
fmpq_mat_swap_rows(mat, perm, i, mat->r - i - 1);
}
void fmpq_mat_invert_cols(fmpq_mat_t mat, slong * perm)
{
if (!fmpq_mat_is_empty(mat))
{
slong t, i;
slong c = mat->c;
slong k = mat->c/2;
if (perm != NULL)
for (i = 0; i < k; i++)
FLINT_SWAP(slong, perm[i], perm[c - i - 1]);
for (t = 0; t < mat->r; t++)
for (i = 0; i < k; i++)
fmpq_swap(fmpq_mat_entry(mat, t, i), fmpq_mat_entry(mat, t, c - i - 1));
}
}