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annotate liboctave/numeric/floatAEPBAL.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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3 Copyright (C) 1994-2015 John W. Eaton
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4 Copyright (C) 2008 Jaroslav Hajek
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include <string>
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29
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30 #include "floatAEPBAL.h"
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31 #include "f77-fcn.h"
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32
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33 extern "C"
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34 {
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35 F77_RET_T
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36 F77_FUNC (sgebal, SGEBAL) (F77_CONST_CHAR_ARG_DECL,
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37 const octave_idx_type&, float*,
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38 const octave_idx_type&, octave_idx_type&,
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39 octave_idx_type&, float*, octave_idx_type&
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40 F77_CHAR_ARG_LEN_DECL);
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41
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42 F77_RET_T
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43 F77_FUNC (sgebak, SGEBAK) (F77_CONST_CHAR_ARG_DECL,
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44 F77_CONST_CHAR_ARG_DECL,
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45 const octave_idx_type&, const octave_idx_type&,
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46 const octave_idx_type&, const float*,
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47 const octave_idx_type&, float*,
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48 const octave_idx_type&, octave_idx_type&
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49 F77_CHAR_ARG_LEN_DECL
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50 F77_CHAR_ARG_LEN_DECL);
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51 }
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52
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53 FloatAEPBALANCE::FloatAEPBALANCE (const FloatMatrix& a,
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54 bool noperm, bool noscal)
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55 : base_aepbal<FloatMatrix, FloatColumnVector> ()
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56 {
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57 octave_idx_type n = a.cols ();
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58
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59 if (a.rows () != n)
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60 (*current_liboctave_error_handler) ("AEPBALANCE requires square matrix");
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61
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62 octave_idx_type info;
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63
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64 scale = FloatColumnVector (n);
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65 float *pscale = scale.fortran_vec ();
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66
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67 balanced_mat = a;
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68 float *p_balanced_mat = balanced_mat.fortran_vec ();
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69
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70 job = noperm ? (noscal ? 'N' : 'S') : (noscal ? 'P' : 'B');
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71
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72 F77_XFCN (sgebal, SGEBAL, (F77_CONST_CHAR_ARG2 (&job, 1),
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73 n, p_balanced_mat, n, ilo, ihi, pscale, info
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74 F77_CHAR_ARG_LEN (1)));
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75 }
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76
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77 FloatMatrix
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78 FloatAEPBALANCE::balancing_matrix (void) const
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79 {
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80 octave_idx_type n = balanced_mat.rows ();
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81 FloatMatrix balancing_mat (n, n, 0.0);
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82 for (octave_idx_type i = 0; i < n; i++)
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83 balancing_mat.elem (i ,i) = 1.0;
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84
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85 float *p_balancing_mat = balancing_mat.fortran_vec ();
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86 const float *pscale = scale.fortran_vec ();
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87
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88 octave_idx_type info;
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89
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90 char side = 'R';
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91
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92 F77_XFCN (sgebak, SGEBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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93 F77_CONST_CHAR_ARG2 (&side, 1),
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94 n, ilo, ihi, pscale, n,
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95 p_balancing_mat, n, info
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96 F77_CHAR_ARG_LEN (1)
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97 F77_CHAR_ARG_LEN (1)));
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98
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99 return balancing_mat;
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100 }