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/*
* Matrix operations library
*
* Copyright (C) 1999-2000
* Thomas Sailer, <sailer@ife.ee.ethz.ch>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* AIX requires this to be the first thing in the file. */
#ifndef __GNUC__
# if HAVE_ALLOCA_H
# include <alloca.h>
# else
# ifdef _AIX
#pragma alloca
# else
# ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
# endif
# endif
# endif
#endif
#include <string.h>
#include "mat.h"
/* Transpose a matrix (a el C^{d1 x d2}, b el C^{d2 x d1}) */
void fctranspose(cplxfloat_t *b, const cplxfloat_t *a, unsigned int d1, unsigned int d2)
{
const cplxfloat_t *c = a;
unsigned int ci, bi, i, j;
if (b == a) {
c = alloca(d1 * d2 * sizeof(c[0]));
memcpy((void *)c, a, d1 * d2 * sizeof(c[0]));
}
for (i = 0; i < d1; i++)
for (j = 0; j < d2; j++) {
ci = i*d2+j;
bi = j*d1+i;
b[bi] = c[ci];
}
}
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