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/*
Copyright (C) 2015 Tommy Hofmann
This file is part of Arb.
Arb 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 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "arb_mat.h"
void
arb_mat_transpose(arb_mat_t B, const arb_mat_t A)
{
slong i, j;
if (arb_mat_nrows(B) != arb_mat_ncols(A) || arb_mat_ncols(B) != arb_mat_nrows(A))
{
flint_printf("Exception (arb_mat_transpose). Incompatible dimensions.\n");
flint_abort();
}
if (arb_mat_is_empty(A))
return;
if (A == B) /* In-place, guaranteed to be square */
{
for (i = 0; i < arb_mat_nrows(A) - 1; i++)
{
for (j = i + 1; j < arb_mat_ncols(A); j++)
{
arb_swap(arb_mat_entry(A, i, j), arb_mat_entry(A, j, i));
}
}
}
else /* Not aliased; general case */
{
for (i = 0; i < arb_mat_nrows(B); i++)
for (j = 0; j < arb_mat_ncols(B); j++)
arb_set(arb_mat_entry(B, i, j), arb_mat_entry(A, j, i));
}
}
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