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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if defined (__GNUG__) && ! defined (NO_PRAGMA_INTERFACE_IMPLEMENTATION) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include <string> |
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32 |
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33 #include "CmplxAEPBAL.h" |
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34 #include "dMatrix.h" |
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35 #include "f77-fcn.h" |
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36 |
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37 extern "C" |
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38 { |
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39 int F77_FUNC (zgebal, ZGEBAL) (const char*, const int&, Complex*, |
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40 const int&, int&, int&, double*, int&, |
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41 long, long); |
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42 |
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43 int F77_FUNC (zgebak, ZGEBAK) (const char*, const char*, const int&, |
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44 const int&, const int&, double*, const |
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45 int&, Complex*, const int&, int&, |
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46 long, long); |
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47 } |
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48 |
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49 int |
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50 ComplexAEPBALANCE::init (const ComplexMatrix& a, |
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51 const std::string& balance_job) |
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52 { |
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53 int n = a.cols (); |
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54 |
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55 if (a.rows () != n) |
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56 { |
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57 (*current_liboctave_error_handler) ("AEPBALANCE requires square matrix"); |
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58 return -1; |
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59 } |
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60 |
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61 int info; |
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62 int ilo; |
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63 int ihi; |
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64 |
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65 Array<double> scale (n); |
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66 double *pscale = scale.fortran_vec (); |
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67 |
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68 balanced_mat = a; |
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69 Complex *p_balanced_mat = balanced_mat.fortran_vec (); |
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70 |
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71 char job = balance_job[0]; |
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72 |
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73 F77_XFCN (zgebal, ZGEBAL, (&job, n, p_balanced_mat, n, ilo, ihi, |
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74 pscale, info, 1L, 1L)); |
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75 |
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76 if (f77_exception_encountered) |
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77 (*current_liboctave_error_handler) ("unrecoverable error in zgebal"); |
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78 else |
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79 { |
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80 balancing_mat = ComplexMatrix (n, n, 0.0); |
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81 for (int i = 0; i < n; i++) |
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82 balancing_mat.elem (i, i) = 1.0; |
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83 |
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84 Complex *p_balancing_mat = balancing_mat.fortran_vec (); |
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85 |
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86 char side = 'R'; |
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87 |
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88 F77_XFCN (zgebak, ZGEBAK, (&job, &side, n, ilo, ihi, pscale, n, |
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89 p_balancing_mat, n, info, 1L, 1L)); |
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90 |
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91 if (f77_exception_encountered) |
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92 (*current_liboctave_error_handler) ("unrecoverable error in zgebak"); |
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93 } |
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94 |
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95 return info; |
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96 } |
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97 |
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98 /* |
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99 ;;; Local Variables: *** |
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100 ;;; mode: C++ *** |
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101 ;;; End: *** |
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102 */ |
