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/*
Copyright (C) 1994, 1995, 1996, 1997, 2000, 2002, 2003, 2004, 2005,
2007 John W. Eaton
This file is part of Octave.
Octave 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 3 of the License, or (at your
option) any later version.
Octave 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 Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string>
#include "CmplxAEPBAL.h"
#include "dMatrix.h"
#include "f77-fcn.h"
extern "C"
{
F77_RET_T
F77_FUNC (zgebal, ZGEBAL) (F77_CONST_CHAR_ARG_DECL, const octave_idx_type&,
Complex*, const octave_idx_type&,
octave_idx_type&, octave_idx_type&, double*,
octave_idx_type& F77_CHAR_ARG_LEN_DECL);
F77_RET_T
F77_FUNC (zgebak, ZGEBAK) (F77_CONST_CHAR_ARG_DECL, F77_CONST_CHAR_ARG_DECL,
const octave_idx_type&, const octave_idx_type&,
const octave_idx_type&, double*,
const octave_idx_type&, Complex*,
const octave_idx_type&, octave_idx_type&
F77_CHAR_ARG_LEN_DECL F77_CHAR_ARG_LEN_DECL);
}
octave_idx_type
ComplexAEPBALANCE::init (const ComplexMatrix& a,
const std::string& balance_job)
{
octave_idx_type n = a.cols ();
if (a.rows () != n)
{
(*current_liboctave_error_handler) ("AEPBALANCE requires square matrix");
return -1;
}
octave_idx_type info;
octave_idx_type ilo;
octave_idx_type ihi;
Array<double> scale (n);
double *pscale = scale.fortran_vec ();
balanced_mat = a;
Complex *p_balanced_mat = balanced_mat.fortran_vec ();
char job = balance_job[0];
F77_XFCN (zgebal, ZGEBAL, (F77_CONST_CHAR_ARG2 (&job, 1),
n, p_balanced_mat, n, ilo, ihi,
pscale, info
F77_CHAR_ARG_LEN (1)));
if (f77_exception_encountered)
(*current_liboctave_error_handler) ("unrecoverable error in zgebal");
else
{
balancing_mat = ComplexMatrix (n, n, 0.0);
for (octave_idx_type i = 0; i < n; i++)
balancing_mat.elem (i, i) = 1.0;
Complex *p_balancing_mat = balancing_mat.fortran_vec ();
char side = 'R';
F77_XFCN (zgebak, ZGEBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
F77_CONST_CHAR_ARG2 (&side, 1),
n, ilo, ihi, pscale, n,
p_balancing_mat, n, info
F77_CHAR_ARG_LEN (1)
F77_CHAR_ARG_LEN (1)));
if (f77_exception_encountered)
(*current_liboctave_error_handler) ("unrecoverable error in zgebak");
}
return info;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
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