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/*
Copyright (C) 1996 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 2, 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, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if defined (__GNUG__)
#pragma implementation
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "dbleLU.h"
#include "f77-fcn.h"
#include "lo-error.h"
#include "mx-inlines.cc"
// Instantiate the base LU class for the types we need.
#include <base-lu.h>
#include <base-lu.cc>
template class base_lu <Matrix, double, Matrix, double>;
// Define the constructor for this particular derivation.
extern "C"
{
int F77_FCN (dgesv, DGESV) (const int&, const int&, double*,
const int&, int*, double&, const int&,
int&);
}
LU::LU (const Matrix& a)
{
int a_nr = a.rows ();
int a_nc = a.cols ();
if (a_nr == 0 || a_nc == 0 || a_nr != a_nc)
{
(*current_liboctave_error_handler) ("LU requires square matrix");
return;
}
int n = a_nr;
ipvt.resize (n);
int *pipvt = ipvt.fortran_vec ();
a_fact = a;
double *tmp_data = a_fact.fortran_vec ();
int info = 0;
double dummy = 0;
F77_XFCN (dgesv, DGESV, (n, 0, tmp_data, n, pipvt, dummy, n, info));
if (f77_exception_encountered)
(*current_liboctave_error_handler) ("unrecoverable error in dgesv");
else
ipvt -= 1;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
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