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

63 lines
1.9 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 <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "nmod_mat.h"
#include "nmod_vec.h"
void
nmod_mat_transpose(nmod_mat_t B, const nmod_mat_t A)
{
mp_limb_t tmp;
slong i, j;
if (B->r != A->c || B->c != A->r)
{
flint_printf("Exception (nmod_mat_transpose). Incompatible dimensions.\n");
abort();
}
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++)
{
tmp = A->rows[i][j];
A->rows[i][j] = A->rows[j][i];
A->rows[j][i] = tmp;
}
}
else /* Not aliased; general case */
{
for (i = 0; i < B->r; i++)
for (j = 0; j < B->c; j++)
B->rows[i][j] = A->rows[j][i];
}
}