Mercurial > octave-nkf
annotate liboctave/fCmplxSCHUR.cc @ 11498:367bfee35ba0
data member initialization fixes
author | John W. Eaton <jwe@octave.org> |
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date | Thu, 13 Jan 2011 02:37:45 -0500 |
parents | 8a5e980da6aa |
children | fd0a3ac60b0e |
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1 /* |
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2 |
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3 Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2002, 2003, 2004, |
8920 | 4 2005, 2007, 2008 John W. Eaton |
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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 "fCmplxSCHUR.h" |
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29 #include "f77-fcn.h" |
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30 #include "lo-error.h" |
10822 | 31 #include "oct-locbuf.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 (cgeesx, CGEESX) (F77_CONST_CHAR_ARG_DECL, |
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37 F77_CONST_CHAR_ARG_DECL, |
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38 FloatComplexSCHUR::select_function, |
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39 F77_CONST_CHAR_ARG_DECL, |
11495 | 40 const octave_idx_type&, FloatComplex*, |
41 const octave_idx_type&, octave_idx_type&, | |
42 FloatComplex*, FloatComplex*, | |
43 const octave_idx_type&, float&, float&, | |
44 FloatComplex*, const octave_idx_type&, | |
45 float*, octave_idx_type*, octave_idx_type& | |
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46 F77_CHAR_ARG_LEN_DECL |
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47 F77_CHAR_ARG_LEN_DECL |
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48 F77_CHAR_ARG_LEN_DECL); |
10822 | 49 F77_RET_T |
11495 | 50 F77_FUNC (crsf2csf, CRSF2CSF) (const octave_idx_type&, FloatComplex *, |
51 FloatComplex *, float *, float *); | |
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52 } |
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53 |
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54 static octave_idx_type |
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55 select_ana (const FloatComplex& a) |
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56 { |
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57 return a.real () < 0.0; |
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58 } |
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59 |
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60 static octave_idx_type |
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61 select_dig (const FloatComplex& a) |
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62 { |
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63 return (abs (a) < 1.0); |
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64 } |
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65 |
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66 octave_idx_type |
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67 FloatComplexSCHUR::init (const FloatComplexMatrix& a, const std::string& ord, |
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68 bool calc_unitary) |
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69 { |
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70 octave_idx_type a_nr = a.rows (); |
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71 octave_idx_type a_nc = a.cols (); |
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72 |
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73 if (a_nr != a_nc) |
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74 { |
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75 (*current_liboctave_error_handler) |
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76 ("FloatComplexSCHUR requires square matrix"); |
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77 return -1; |
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78 } |
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79 else if (a_nr == 0) |
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80 { |
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81 schur_mat.clear (); |
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82 unitary_mat.clear (); |
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83 return 0; |
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84 } |
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85 |
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86 // Workspace requirements may need to be fixed if any of the |
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87 // following change. |
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88 |
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89 char jobvs; |
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90 char sense = 'N'; |
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91 char sort = 'N'; |
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92 |
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93 if (calc_unitary) |
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94 jobvs = 'V'; |
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95 else |
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96 jobvs = 'N'; |
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97 |
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98 char ord_char = ord.empty () ? 'U' : ord[0]; |
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99 |
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100 if (ord_char == 'A' || ord_char == 'D' || ord_char == 'a' || ord_char == 'd') |
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101 sort = 'S'; |
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102 |
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103 if (ord_char == 'A' || ord_char == 'a') |
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104 selector = select_ana; |
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105 else if (ord_char == 'D' || ord_char == 'd') |
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106 selector = select_dig; |
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107 else |
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108 selector = 0; |
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109 |
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110 octave_idx_type n = a_nc; |
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111 octave_idx_type lwork = 8 * n; |
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112 octave_idx_type info; |
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113 octave_idx_type sdim; |
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114 float rconde; |
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115 float rcondv; |
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116 |
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117 schur_mat = a; |
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118 if (calc_unitary) |
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119 unitary_mat.clear (n, n); |
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120 |
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121 FloatComplex *s = schur_mat.fortran_vec (); |
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122 FloatComplex *q = unitary_mat.fortran_vec (); |
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123 |
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124 Array<float> rwork (n, 1); |
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125 float *prwork = rwork.fortran_vec (); |
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126 |
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127 Array<FloatComplex> w (n, 1); |
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128 FloatComplex *pw = w.fortran_vec (); |
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129 |
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130 Array<FloatComplex> work (lwork, 1); |
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131 FloatComplex *pwork = work.fortran_vec (); |
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132 |
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133 // BWORK is not referenced for non-ordered Schur. |
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134 Array<octave_idx_type> bwork ((ord_char == 'N' || ord_char == 'n') ? 0 : n, 1); |
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135 octave_idx_type *pbwork = bwork.fortran_vec (); |
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136 |
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137 F77_XFCN (cgeesx, CGEESX, (F77_CONST_CHAR_ARG2 (&jobvs, 1), |
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138 F77_CONST_CHAR_ARG2 (&sort, 1), |
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139 selector, |
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140 F77_CONST_CHAR_ARG2 (&sense, 1), |
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141 n, s, n, sdim, pw, q, n, rconde, rcondv, |
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142 pwork, lwork, prwork, pbwork, info |
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143 F77_CHAR_ARG_LEN (1) |
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144 F77_CHAR_ARG_LEN (1) |
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145 F77_CHAR_ARG_LEN (1))); |
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146 |
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147 return info; |
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148 } |
10822 | 149 |
150 FloatComplexSCHUR::FloatComplexSCHUR (const FloatComplexMatrix& s, | |
151 const FloatComplexMatrix& u) | |
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152 : schur_mat (s), unitary_mat (u), selector (0) |
10822 | 153 { |
154 octave_idx_type n = s.rows (); | |
155 if (s.columns () != n || u.rows () != n || u.columns () != n) | |
156 (*current_liboctave_error_handler) | |
157 ("schur: inconsistent matrix dimensions"); | |
158 } | |
159 | |
160 FloatComplexSCHUR::FloatComplexSCHUR (const FloatSCHUR& s) | |
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161 : schur_mat (s.schur_matrix ()), unitary_mat (s.unitary_matrix ()), |
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162 selector (0) |
10822 | 163 { |
164 octave_idx_type n = schur_mat.rows (); | |
165 if (n > 0) | |
166 { | |
167 OCTAVE_LOCAL_BUFFER (float, c, n-1); | |
168 OCTAVE_LOCAL_BUFFER (float, sx, n-1); | |
169 | |
170 F77_XFCN (crsf2csf, CRSF2CSF, (n, schur_mat.fortran_vec (), | |
171 unitary_mat.fortran_vec (), c, sx)); | |
172 } | |
173 } |