--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboctave/CmplxSVD.cc	Mon Jun 06 00:33:51 1994 +0000
@@ -0,0 +1,89 @@
+//                                        -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if defined (__GNUG__)
+#pragma implementation
+#endif
+
+#include "CmplxSVD.h"
+#include "mx-inlines.cc"
+#include "f77-uscore.h"
+
+extern "C"
+{
+  int F77_FCN (zgesvd) (const char*, const char*, const int*,
+			const int*, Complex*, const int*, double*,
+			Complex*, const int*, Complex*, const int*,
+			Complex*, const int*, double*, int*, long, long);
+}
+
+int
+ComplexSVD::init (const ComplexMatrix& a)
+{
+  int info;
+
+  int m = a.rows ();
+  int n = a.cols ();
+
+  char jobu = 'A';
+  char jobv = 'A';
+
+  Complex *tmp_data = dup (a.data (), a.length ());
+
+  int min_mn = m < n ? m : n;
+  int max_mn = m > n ? m : n;
+
+  Complex *u = new Complex[m*m];
+  double *s_vec  = new double[min_mn];
+  Complex *vt = new Complex[n*n];
+
+  int lwork = 2*min_mn + max_mn;
+  Complex *work = new Complex[lwork];
+
+  int lrwork = 5*max_mn;
+  double *rwork = new double[lrwork];
+
+  F77_FCN (zgesvd) (&jobu, &jobv, &m, &n, tmp_data, &m, s_vec, u, &m,
+		    vt, &n, work, &lwork, rwork, &info, 1L, 1L);
+
+  left_sm = ComplexMatrix (u, m, m);
+  sigma = DiagMatrix (s_vec, m, n);
+  ComplexMatrix vt_m (vt, n, n);
+  right_sm = ComplexMatrix (vt_m.hermitian ());
+
+  delete [] tmp_data;
+  delete [] work;
+
+  return info;
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/