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/*
Copyright (C) 2025 Lars Göttgens
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 "nmod_poly.h"
#include "nmod_poly_mat.h"
void
nmod_poly_mat_transpose(nmod_poly_mat_t B, const nmod_poly_mat_t A)
{
slong i, j;
if (B->r != A->c || B->c != A->r)
{
flint_throw(FLINT_ERROR, "Exception (nmod_poly_mat_transpose). Incompatible dimensions.\n");
}
if (A == B) /* In-place, guaranteed to be square */
{
for (i = 0; i < A->r - 1; i++)
for (j = i + 1; j < A->c; j++)
nmod_poly_swap(nmod_poly_mat_entry(A, i, j), nmod_poly_mat_entry(A, j, i));
}
else /* Not aliased; general case */
{
for (i = 0; i < B->r; i++)
for (j = 0; j < B->c; j++)
nmod_poly_set(nmod_poly_mat_entry(B, i, j), nmod_poly_mat_entry(A, j, i));
}
}