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maint: Update copyright notices for release.
author John W. Eaton <jwe@octave.org>
date Wed, 23 Oct 2013 22:09:27 -0400
parents 648dabbb4c6b
children 49a5a4be04a1
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1 /*
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2
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3 Copyright (C) 1994-2013 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 <string>
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28 #include <vector>
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29
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30 #include "floatGEPBAL.h"
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31 #include "Array-util.h"
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32 #include "f77-fcn.h"
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33 #include "oct-locbuf.h"
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34
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35 extern "C"
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36 {
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37 F77_RET_T
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38 F77_FUNC (sggbal, SGGBAL) (F77_CONST_CHAR_ARG_DECL,
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39 const octave_idx_type& N, float* A,
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40 const octave_idx_type& LDA, float* B,
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41 const octave_idx_type& LDB,
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42 octave_idx_type& ILO, octave_idx_type& IHI,
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43 float* LSCALE, float* RSCALE,
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44 float* WORK, octave_idx_type& INFO
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45 F77_CHAR_ARG_LEN_DECL);
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46
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47 F77_RET_T
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48 F77_FUNC (sggbak, SGGBAK) (F77_CONST_CHAR_ARG_DECL,
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49 F77_CONST_CHAR_ARG_DECL,
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50 const octave_idx_type& N,
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51 const octave_idx_type& ILO,
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52 const octave_idx_type& IHI,
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53 const float* LSCALE, const float* RSCALE,
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54 octave_idx_type& M, float* V,
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55 const octave_idx_type& LDV, octave_idx_type& INFO
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56 F77_CHAR_ARG_LEN_DECL
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57 F77_CHAR_ARG_LEN_DECL);
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58
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59 }
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60
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61 octave_idx_type
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62 FloatGEPBALANCE::init (const FloatMatrix& a, const FloatMatrix& b,
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63 const std::string& balance_job)
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64 {
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65 octave_idx_type n = a.cols ();
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66
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67 if (a.rows () != n)
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68 {
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69 (*current_liboctave_error_handler) ("FloatGEPBALANCE requires square matrix");
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70 return -1;
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71 }
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72
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73 if (a.dims () != b.dims ())
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74 {
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75 gripe_nonconformant ("FloatGEPBALANCE", n, n, b.rows(), b.cols());
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76 return -1;
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77 }
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78
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79 octave_idx_type info;
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80 octave_idx_type ilo;
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81 octave_idx_type ihi;
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82
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83 OCTAVE_LOCAL_BUFFER (float, plscale, n);
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84 OCTAVE_LOCAL_BUFFER (float, prscale, n);
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85 OCTAVE_LOCAL_BUFFER (float, pwork, 6 * n);
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86
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87 balanced_mat = a;
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88 float *p_balanced_mat = balanced_mat.fortran_vec ();
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89 balanced_mat2 = b;
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90 float *p_balanced_mat2 = balanced_mat2.fortran_vec ();
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91
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92 char job = balance_job[0];
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93
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94 F77_XFCN (sggbal, SGGBAL, (F77_CONST_CHAR_ARG2 (&job, 1),
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95 n, p_balanced_mat, n, p_balanced_mat2,
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96 n, ilo, ihi, plscale, prscale, pwork, info
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97 F77_CHAR_ARG_LEN (1)));
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98
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99 balancing_mat = FloatMatrix (n, n, 0.0);
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100 balancing_mat2 = FloatMatrix (n, n, 0.0);
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101 for (octave_idx_type i = 0; i < n; i++)
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102 {
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103 octave_quit ();
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104 balancing_mat.elem (i ,i) = 1.0;
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105 balancing_mat2.elem (i ,i) = 1.0;
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106 }
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107
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108 float *p_balancing_mat = balancing_mat.fortran_vec ();
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109 float *p_balancing_mat2 = balancing_mat2.fortran_vec ();
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110
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111 // first left
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112 F77_XFCN (sggbak, SGGBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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113 F77_CONST_CHAR_ARG2 ("L", 1),
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114 n, ilo, ihi, plscale, prscale,
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115 n, p_balancing_mat, n, info
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116 F77_CHAR_ARG_LEN (1)
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117 F77_CHAR_ARG_LEN (1)));
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118
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119 // then right
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120 F77_XFCN (sggbak, SGGBAK, (F77_CONST_CHAR_ARG2 (&job, 1),
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121 F77_CONST_CHAR_ARG2 ("R", 1),
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122 n, ilo, ihi, plscale, prscale,
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123 n, p_balancing_mat2, n, info
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124 F77_CHAR_ARG_LEN (1)
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125 F77_CHAR_ARG_LEN (1)));
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126
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127 return info;
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128 }