Mercurial > hg > octave-lyh
annotate liboctave/CmplxSCHUR.cc @ 11495:8a5e980da6aa
style fixes
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Thu, 13 Jan 2011 02:09:02 -0500 |
| parents | 23d2378512a0 |
| children | 367bfee35ba0 |
| rev | line source |
|---|---|
| 457 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2002, 2003, 2004, |
| 8920 | 4 2005, 2007, 2008 John W. Eaton |
| 457 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 457 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 457 | 21 |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 1192 | 25 #include <config.h> |
| 457 | 26 #endif |
| 27 | |
| 28 #include "CmplxSCHUR.h" | |
| 1847 | 29 #include "f77-fcn.h" |
| 457 | 30 #include "lo-error.h" |
| 10822 | 31 #include "oct-locbuf.h" |
| 457 | 32 |
| 33 extern "C" | |
| 34 { | |
| 4552 | 35 F77_RET_T |
| 36 F77_FUNC (zgeesx, ZGEESX) (F77_CONST_CHAR_ARG_DECL, | |
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37 F77_CONST_CHAR_ARG_DECL, |
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38 ComplexSCHUR::select_function, |
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39 F77_CONST_CHAR_ARG_DECL, |
| 11495 | 40 const octave_idx_type&, Complex*, |
| 41 const octave_idx_type&, octave_idx_type&, | |
| 42 Complex*, Complex*, const octave_idx_type&, | |
| 43 double&, double&, Complex*, | |
| 44 const octave_idx_type&, double*, | |
| 45 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); |
| 11495 | 49 |
| 10822 | 50 F77_RET_T |
| 11495 | 51 F77_FUNC (zrsf2csf, ZRSF2CSF) (const octave_idx_type&, Complex *, |
| 52 Complex *, double *, double *); | |
| 457 | 53 } |
| 54 | |
| 5275 | 55 static octave_idx_type |
| 1929 | 56 select_ana (const Complex& a) |
| 457 | 57 { |
| 1251 | 58 return a.real () < 0.0; |
| 457 | 59 } |
| 60 | |
| 5275 | 61 static octave_idx_type |
| 1929 | 62 select_dig (const Complex& a) |
| 457 | 63 { |
| 1251 | 64 return (abs (a) < 1.0); |
| 457 | 65 } |
| 66 | |
| 5275 | 67 octave_idx_type |
| 5008 | 68 ComplexSCHUR::init (const ComplexMatrix& a, const std::string& ord, |
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69 bool calc_unitary) |
| 457 | 70 { |
| 5275 | 71 octave_idx_type a_nr = a.rows (); |
| 72 octave_idx_type a_nc = a.cols (); | |
| 1929 | 73 |
| 457 | 74 if (a_nr != a_nc) |
| 75 { | |
| 76 (*current_liboctave_error_handler) | |
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77 ("ComplexSCHUR requires square matrix"); |
| 457 | 78 return -1; |
| 79 } | |
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80 else if (a_nr == 0) |
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81 { |
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82 schur_mat.clear (); |
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83 unitary_mat.clear (); |
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84 return 0; |
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85 } |
| 457 | 86 |
| 3334 | 87 // Workspace requirements may need to be fixed if any of the |
| 88 // following change. | |
| 89 | |
| 5008 | 90 char jobvs; |
| 1930 | 91 char sense = 'N'; |
| 92 char sort = 'N'; | |
| 1756 | 93 |
| 5008 | 94 if (calc_unitary) |
| 95 jobvs = 'V'; | |
| 96 else | |
| 97 jobvs = 'N'; | |
| 98 | |
| 1756 | 99 char ord_char = ord.empty () ? 'U' : ord[0]; |
| 100 | |
| 101 if (ord_char == 'A' || ord_char == 'D' || ord_char == 'a' || ord_char == 'd') | |
| 1930 | 102 sort = 'S'; |
| 457 | 103 |
| 1929 | 104 if (ord_char == 'A' || ord_char == 'a') |
| 105 selector = select_ana; | |
| 106 else if (ord_char == 'D' || ord_char == 'd') | |
| 107 selector = select_dig; | |
| 1930 | 108 else |
| 109 selector = 0; | |
| 457 | 110 |
| 5275 | 111 octave_idx_type n = a_nc; |
| 112 octave_idx_type lwork = 8 * n; | |
| 113 octave_idx_type info; | |
| 114 octave_idx_type sdim; | |
| 457 | 115 double rconde; |
| 116 double rcondv; | |
| 117 | |
| 1929 | 118 schur_mat = a; |
| 5008 | 119 if (calc_unitary) |
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120 unitary_mat.clear (n, n); |
| 1929 | 121 |
| 122 Complex *s = schur_mat.fortran_vec (); | |
| 123 Complex *q = unitary_mat.fortran_vec (); | |
| 124 | |
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125 Array<double> rwork (n, 1); |
| 1929 | 126 double *prwork = rwork.fortran_vec (); |
| 127 | |
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128 Array<Complex> w (n, 1); |
| 1929 | 129 Complex *pw = w.fortran_vec (); |
| 130 | |
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131 Array<Complex> work (lwork, 1); |
| 1929 | 132 Complex *pwork = work.fortran_vec (); |
| 457 | 133 |
| 3334 | 134 // BWORK is not referenced for non-ordered Schur. |
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135 Array<octave_idx_type> bwork ((ord_char == 'N' || ord_char == 'n') ? 0 : n, 1); |
| 5275 | 136 octave_idx_type *pbwork = bwork.fortran_vec (); |
| 457 | 137 |
| 4552 | 138 F77_XFCN (zgeesx, ZGEESX, (F77_CONST_CHAR_ARG2 (&jobvs, 1), |
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139 F77_CONST_CHAR_ARG2 (&sort, 1), |
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140 selector, |
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141 F77_CONST_CHAR_ARG2 (&sense, 1), |
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142 n, s, n, sdim, pw, q, n, rconde, rcondv, |
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143 pwork, lwork, prwork, pbwork, info |
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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 F77_CHAR_ARG_LEN (1))); |
| 457 | 147 |
| 148 return info; | |
| 149 } | |
| 10822 | 150 |
| 151 ComplexSCHUR::ComplexSCHUR (const ComplexMatrix& s, | |
| 152 const ComplexMatrix& u) | |
| 153 : schur_mat (s), unitary_mat (u) | |
| 154 { | |
| 155 octave_idx_type n = s.rows (); | |
| 156 if (s.columns () != n || u.rows () != n || u.columns () != n) | |
| 157 (*current_liboctave_error_handler) | |
| 158 ("schur: inconsistent matrix dimensions"); | |
| 159 } | |
| 160 | |
| 161 ComplexSCHUR::ComplexSCHUR (const SCHUR& s) | |
| 162 : schur_mat (s.schur_matrix ()), unitary_mat (s.unitary_matrix ()) | |
| 163 { | |
| 164 octave_idx_type n = schur_mat.rows (); | |
| 165 if (n > 0) | |
| 166 { | |
| 167 OCTAVE_LOCAL_BUFFER (double, c, n-1); | |
| 168 OCTAVE_LOCAL_BUFFER (double, sx, n-1); | |
| 169 | |
| 170 F77_XFCN (zrsf2csf, ZRSF2CSF, (n, schur_mat.fortran_vec (), | |
| 171 unitary_mat.fortran_vec (), c, sx)); | |
| 172 } | |
| 173 } |