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1 /* |
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2 |
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3 Copyright (C) 2005 David Bateman |
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4 Copyright (C) 1998-2005 Andy Adler |
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5 |
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6 Octave is free software; you can redistribute it and/or modify it |
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7 under the terms of the GNU General Public License as published by the |
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8 Free Software Foundation; either version 2, or (at your option) any |
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9 later version. |
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10 |
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11 Octave is distributed in the hope that it will be useful, but WITHOUT |
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 for more details. |
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15 |
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16 You should have received a copy of the GNU General Public License |
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17 along with this program; see the file COPYING. If not, write to the |
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18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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19 Boston, MA 02110-1301, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_sparse_base_chol_h) |
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24 #define octave_sparse_base_chol_h 1 |
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25 |
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26 #ifdef HAVE_CONFIG_H |
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27 #include <config.h> |
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28 #endif |
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29 |
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30 #include "oct-sparse.h" |
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31 #include "dColVector.h" |
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32 |
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33 template <class chol_type, class chol_elt, class p_type> |
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34 class |
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35 sparse_base_chol |
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36 { |
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37 protected: |
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38 class sparse_base_chol_rep |
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39 { |
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40 public: |
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41 sparse_base_chol_rep (void) : count (1), Lsparse (NULL), |
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42 is_pd (false), minor_p (0) { } |
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43 |
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44 sparse_base_chol_rep (const chol_type& a, |
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45 const bool natural) : count (1) |
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46 { init (a, natural); } |
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47 |
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48 sparse_base_chol_rep (const chol_type& a, octave_idx_type& info, |
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49 const bool natural) : count (1) |
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50 { info = init (a, natural); } |
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51 |
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52 #ifndef HAVE_CHOLMOD |
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53 ~sparse_base_chol_rep (void) { } |
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54 #else |
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55 ~sparse_base_chol_rep (void) |
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56 { CHOLMOD_NAME(free_sparse) (&Lsparse, &Common); } |
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57 #endif |
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58 |
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59 cholmod_sparse * L (void) const { return Lsparse; } |
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60 |
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61 octave_idx_type P (void) const |
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62 { return (minor_p == static_cast<octave_idx_type>(Lsparse->ncol) ? |
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63 0 : minor_p + 1); } |
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64 |
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65 ColumnVector perm (void) const { return perms + 1; } |
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66 |
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67 p_type Q (void) const; |
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68 |
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69 bool is_positive_definite (void) const { return is_pd; } |
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70 |
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71 double rcond (void) const { return cond; } |
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72 |
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73 int count; |
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74 |
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75 private: |
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76 cholmod_sparse *Lsparse; |
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77 |
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78 cholmod_common Common; |
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79 |
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80 bool is_pd; |
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81 |
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82 octave_idx_type minor_p; |
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83 |
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84 ColumnVector perms; |
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85 |
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86 double cond; |
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87 |
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88 octave_idx_type init (const chol_type& a, bool natural = true); |
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89 |
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90 void drop_zeros (const cholmod_sparse* S); |
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91 |
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92 // No assignment |
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93 sparse_base_chol_rep& operator = (const sparse_base_chol_rep& a); |
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94 }; |
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95 |
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96 private: |
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97 sparse_base_chol_rep *rep; |
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98 |
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99 public: |
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100 |
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101 sparse_base_chol (void) : rep (new typename |
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102 sparse_base_chol<chol_type, chol_elt, p_type>::sparse_base_chol_rep ()) { } |
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103 |
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104 sparse_base_chol (const chol_type& a, const bool n) : rep (new typename |
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105 sparse_base_chol<chol_type, chol_elt, p_type>:: |
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106 sparse_base_chol_rep (a, n)) { } |
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107 |
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108 sparse_base_chol (const chol_type& a, octave_idx_type& info, const bool n) : |
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109 rep (new typename sparse_base_chol<chol_type, chol_elt, p_type>:: |
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110 sparse_base_chol_rep (a, info, n)) { } |
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111 |
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112 sparse_base_chol (const sparse_base_chol<chol_type, chol_elt, p_type>& a) : |
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113 rep (a.rep) { rep->count++; } |
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114 |
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115 ~sparse_base_chol (void) |
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116 { |
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117 if (--rep->count <= 0) |
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118 delete rep; |
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119 } |
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120 |
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121 sparse_base_chol& operator = (const sparse_base_chol& a) |
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122 { |
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123 if (this != &a) |
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124 { |
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125 if (--rep->count <= 0) |
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126 delete rep; |
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127 |
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128 rep = a.rep; |
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129 rep->count++; |
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130 } |
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131 |
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132 return *this; |
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133 } |
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134 |
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135 chol_type L (void) const; |
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136 |
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137 chol_type R (void) const { return L().hermitian (); } |
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138 |
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139 octave_idx_type P (void) const { return rep->P(); } |
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140 |
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141 ColumnVector perm (void) const { return rep->perm(); } |
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142 |
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143 p_type Q (void) const { return rep->Q(); } |
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144 |
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145 bool is_positive_definite (void) const |
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146 { return rep->is_positive_definite(); } |
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147 |
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148 double rcond (void) const { return rep->rcond(); } |
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149 |
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150 chol_type inverse (void) const; |
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151 }; |
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152 |
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153 #endif |
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154 |
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155 /* |
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156 ;;; Local Variables: *** |
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157 ;;; mode: C++ *** |
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158 ;;; End: *** |
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159 */ |
