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annotate liboctave/numeric/floatHESS.cc @ 21136:7cac4e7458f2

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maint: clean up code around calls to current_liboctave_error_handler. Remove statements after call to handler that are no longer reachable. Place input validation first and immediately call handler if necessary. Change if/error_handler/else to if/error_handler and re-indent code. * Array-util.cc, Array.cc, CColVector.cc, CDiagMatrix.cc, CMatrix.cc, CNDArray.cc, CRowVector.cc, CSparse.cc, DiagArray2.cc, MArray.cc, PermMatrix.cc, Sparse.cc, Sparse.h, chMatrix.cc, chNDArray.cc, dColVector.cc, dDiagMatrix.cc, dMatrix.cc, dNDArray.cc, dRowVector.cc, dSparse.cc, fCColVector.cc, fCDiagMatrix.cc, fCMatrix.cc, fCNDArray.cc, fCRowVector.cc, fColVector.cc, fDiagMatrix.cc, fMatrix.cc, fNDArray.cc, fRowVector.cc, idx-vector.cc, CmplxAEPBAL.cc, CmplxCHOL.cc, CmplxGEPBAL.cc, CmplxHESS.cc, CmplxLU.cc, CmplxQR.cc, CmplxSCHUR.cc, CmplxSVD.cc, DASPK.cc, EIG.cc, LSODE.cc, Quad.cc, SparseCmplxCHOL.cc, SparseCmplxLU.cc, SparseCmplxQR.cc, SparseQR.cc, SparsedbleCHOL.cc, SparsedbleLU.cc, base-lu.cc, bsxfun-defs.cc, dbleAEPBAL.cc, dbleCHOL.cc, dbleGEPBAL.cc, dbleHESS.cc, dbleLU.cc, dbleQR.cc, dbleSCHUR.cc, dbleSVD.cc, eigs-base.cc, fCmplxAEPBAL.cc, fCmplxCHOL.cc, fCmplxLU.cc, fCmplxQR.cc, fCmplxSCHUR.cc, fEIG.cc, floatAEPBAL.cc, floatCHOL.cc, floatGEPBAL.cc, floatHESS.cc, floatLU.cc, floatQR.cc, floatSCHUR.cc, floatSVD.cc, lo-specfun.cc, oct-fftw.cc, oct-rand.cc, oct-spparms.cc, sparse-base-chol.cc, sparse-dmsolve.cc, file-ops.cc, lo-sysdep.cc, mach-info.cc, oct-env.cc, oct-syscalls.cc, cmd-edit.cc, cmd-hist.cc, data-conv.cc, lo-ieee.cc, lo-regexp.cc, oct-base64.cc, oct-shlib.cc, pathsearch.cc, singleton-cleanup.cc, sparse-util.cc, unwind-prot.cc: Remove statements after call to handler that are no longer reachable. Place input validation first and immediately call handler if necessary. Change if/error_handler/else to if/error_handler and re-indent code.
author Rik <rik@octave.org>
date Sat, 23 Jan 2016 13:52:03 -0800
parents 4197fc428c7d
children f7121e111991
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1 /*
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2
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4197fc428c7d maint: Update copyright notices for 2015.
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3 Copyright (C) 1994-2015 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 3 of the License, or (at your
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10 option) any 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, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "floatHESS.h"
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28 #include "f77-fcn.h"
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29 #include "lo-error.h"
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30
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31 extern "C"
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32 {
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33 F77_RET_T
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34 F77_FUNC (sgebal, SGEBAL) (F77_CONST_CHAR_ARG_DECL,
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35 const octave_idx_type&, float*,
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36 const octave_idx_type&, octave_idx_type&,
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37 octave_idx_type&, float*, octave_idx_type&
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38 F77_CHAR_ARG_LEN_DECL);
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39
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40 F77_RET_T
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41 F77_FUNC (sgehrd, SGEHRD) (const octave_idx_type&, const octave_idx_type&,
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42 const octave_idx_type&, float*,
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43 const octave_idx_type&, float*, float*,
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44 const octave_idx_type&, octave_idx_type&);
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45
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46 F77_RET_T
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47 F77_FUNC (sorghr, SORGHR) (const octave_idx_type&, const octave_idx_type&,
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48 const octave_idx_type&, float*,
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49 const octave_idx_type&, float*, float*,
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50 const octave_idx_type&, octave_idx_type&);
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51
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52 F77_RET_T
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53 F77_FUNC (sgebak, SGEBAK) (F77_CONST_CHAR_ARG_DECL,
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54 F77_CONST_CHAR_ARG_DECL,
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55 const octave_idx_type&, const octave_idx_type&,
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56 const octave_idx_type&, float*,
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57 const octave_idx_type&, float*,
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58 const octave_idx_type&, octave_idx_type&
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59 F77_CHAR_ARG_LEN_DECL
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60 F77_CHAR_ARG_LEN_DECL);
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61 }
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62
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63 octave_idx_type
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64 FloatHESS::init (const FloatMatrix& a)
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65 {
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66 octave_idx_type a_nr = a.rows ();
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67 octave_idx_type a_nc = a.cols ();
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68
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69 if (a_nr != a_nc)
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70 (*current_liboctave_error_handler) ("FloatHESS requires square matrix");
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71
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72 char job = 'N';
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73 char side = 'R';
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74
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75 octave_idx_type n = a_nc;
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76 octave_idx_type lwork = 32 * n;
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77 octave_idx_type info;
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78 octave_idx_type ilo;
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79 octave_idx_type ihi;
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80
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81 hess_mat = a;
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82 float *h = hess_mat.fortran_vec ();
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83
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84 Array<float> scale (dim_vector (n, 1));
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85 float *pscale = scale.fortran_vec ();
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86
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87 F77_XFCN (sgebal, SGEBAL, (F77_CONST_CHAR_ARG2 (&job, 1),
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88 n, h, n, ilo, ihi, pscale, info
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89 F77_CHAR_ARG_LEN (1)));
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90
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91 Array<float> tau (dim_vector (n-1, 1));
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92 float *ptau = tau.fortran_vec ();
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93
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94 Array<float> work (dim_vector (lwork, 1));
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95 float *pwork = work.fortran_vec ();
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96
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97 F77_XFCN (sgehrd, SGEHRD, (n, ilo, ihi, h, n, ptau, pwork,
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98 lwork, info));
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99
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100 unitary_hess_mat = hess_mat;
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101 float *z = unitary_hess_mat.fortran_vec ();
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102
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103 F77_XFCN (sorghr, SORGHR, (n, ilo, ihi, z, n, ptau, pwork,
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104 lwork, info));
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105
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106 F77_XFCN (sgebak, SGEBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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107 F77_CONST_CHAR_ARG2 (&side, 1),
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108 n, ilo, ihi, pscale, n, z,
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109 n, info
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110 F77_CHAR_ARG_LEN (1)
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111 F77_CHAR_ARG_LEN (1)));
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112
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113 // If someone thinks of a more graceful way of doing
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114 // this (or faster for that matter :-)), please let
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115 // me know!
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116
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117 if (n > 2)
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118 for (octave_idx_type j = 0; j < a_nc; j++)
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119 for (octave_idx_type i = j+2; i < a_nr; i++)
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120 hess_mat.elem (i, j) = 0;
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121
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122 return info;
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123 }