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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__) |
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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 "dbleLU.h" |
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32 #include "f77-fcn.h" |
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33 #include "lo-error.h" |
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34 |
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35 // Instantiate the base LU class for the types we need. |
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36 |
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37 #include <base-lu.h> |
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38 #include <base-lu.cc> |
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39 |
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40 template class base_lu <Matrix, double, Matrix, double>; |
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41 |
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42 // Define the constructor for this particular derivation. |
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43 |
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44 extern "C" |
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45 { |
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46 int F77_FCN (dgetrf, DGETRF) (const int&, const int&, double*, |
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47 const int&, int*, int&); |
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48 } |
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49 |
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50 LU::LU (const Matrix& a) |
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51 { |
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52 int a_nr = a.rows (); |
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53 int a_nc = a.cols (); |
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54 |
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55 if (a_nr == 0 || a_nc == 0 || a_nr != a_nc) |
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56 { |
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57 (*current_liboctave_error_handler) ("LU requires square matrix"); |
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58 return; |
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59 } |
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60 |
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61 int n = a_nr; |
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62 |
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63 ipvt.resize (n); |
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64 int *pipvt = ipvt.fortran_vec (); |
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65 |
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66 a_fact = a; |
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67 double *tmp_data = a_fact.fortran_vec (); |
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68 |
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69 int info = 0; |
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70 |
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71 F77_XFCN (dgetrf, DGETRF, (n, n, tmp_data, n, pipvt, info)); |
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72 |
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73 if (f77_exception_encountered) |
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74 (*current_liboctave_error_handler) ("unrecoverable error in dgesv"); |
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75 else |
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76 ipvt -= 1; |
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77 } |
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78 |
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79 /* |
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80 ;;; Local Variables: *** |
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81 ;;; mode: C++ *** |
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82 ;;; End: *** |
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83 */ |
