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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_DASSL_h) |
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24 #define octave_DASSL_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <cfloat> |
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31 #include <cmath> |
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32 |
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33 #include "DAE.h" |
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34 |
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35 class |
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36 DASSL_options |
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37 { |
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38 public: |
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39 |
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40 DASSL_options (void) { init (); } |
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41 |
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42 DASSL_options (const DASSL_options& opt) { copy (opt); } |
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43 |
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44 DASSL_options& operator = (const DASSL_options& opt) |
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45 { |
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46 if (this != &opt) |
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47 copy (opt); |
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48 |
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49 return *this; |
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50 } |
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51 |
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52 ~DASSL_options (void) { } |
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53 |
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54 void init (void) |
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55 { |
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56 double sqrt_eps = ::sqrt (DBL_EPSILON); |
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57 x_absolute_tolerance = sqrt_eps; |
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58 x_initial_step_size = -1.0; |
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59 x_maximum_step_size = -1.0; |
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60 x_minimum_step_size = 0.0; |
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61 x_relative_tolerance = sqrt_eps; |
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62 } |
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63 |
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64 void copy (const DASSL_options& opt) |
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65 { |
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66 x_absolute_tolerance = opt.x_absolute_tolerance; |
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67 x_initial_step_size = opt.x_initial_step_size; |
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68 x_maximum_step_size = opt.x_maximum_step_size; |
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69 x_minimum_step_size = opt.x_minimum_step_size; |
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70 x_relative_tolerance = opt.x_relative_tolerance; |
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71 } |
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72 |
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73 void set_default_options (void) { init (); } |
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74 |
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75 void set_absolute_tolerance (double val) |
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76 { x_absolute_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); } |
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77 |
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78 void set_initial_step_size (double val) |
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79 { x_initial_step_size = (val >= 0.0) ? val : -1.0; } |
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80 |
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81 void set_maximum_step_size (double val) |
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82 { x_maximum_step_size = (val >= 0.0) ? val : -1.0; } |
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83 |
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84 void set_minimum_step_size (double val) |
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85 { x_minimum_step_size = (val >= 0.0) ? val : 0.0; } |
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86 |
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87 void set_relative_tolerance (double val) |
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88 { x_relative_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); } |
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89 |
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90 double absolute_tolerance (void) { return x_absolute_tolerance; } |
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91 |
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92 double initial_step_size (void) { return x_initial_step_size; } |
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93 |
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94 double maximum_step_size (void) { return x_maximum_step_size; } |
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95 |
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96 double minimum_step_size (void) { return x_minimum_step_size; } |
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97 |
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98 double relative_tolerance (void) { return x_relative_tolerance; } |
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99 |
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100 private: |
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101 |
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102 double x_absolute_tolerance; |
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103 double x_initial_step_size; |
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104 double x_maximum_step_size; |
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105 double x_minimum_step_size; |
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106 double x_relative_tolerance; |
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107 }; |
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108 |
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109 class |
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110 DASSL : public DAE, public DASSL_options |
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111 { |
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112 public: |
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113 |
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114 DASSL (void); |
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115 |
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116 DASSL (const ColumnVector& state, double time, DAEFunc& f); |
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117 |
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118 DASSL (const ColumnVector& state, const ColumnVector& xdot, |
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119 double time, DAEFunc& f); |
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120 |
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121 ~DASSL (void) { } |
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122 |
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123 void force_restart (void); |
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124 |
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125 void set_stop_time (double t); |
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126 void clear_stop_time (void); |
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127 |
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128 ColumnVector do_integrate (double t); |
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129 |
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130 Matrix do_integrate (const ColumnVector& tout); |
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131 |
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132 Matrix do_integrate (const ColumnVector& tout, const ColumnVector& tcrit); |
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133 |
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134 Matrix integrate (const ColumnVector& tout, Matrix& xdot_out); |
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135 |
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136 Matrix integrate (const ColumnVector& tout, Matrix& xdot_out, |
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137 const ColumnVector& tcrit); |
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138 |
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139 private: |
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140 |
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141 double stop_time; |
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142 int stop_time_set; |
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143 |
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144 int n; |
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145 int integration_error; |
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146 int restart; |
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147 int liw; |
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148 int lrw; |
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149 int idid; |
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150 int sanity_checked; |
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151 Array<int> info; |
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152 Array<int> iwork; |
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153 Array<double> rwork; |
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154 |
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155 friend int ddassl_j (double *time, double *state, double *deriv, |
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156 double *pd, double *cj, double *rpar, int *ipar); |
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157 |
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158 friend int ddassl_f (double *time, double *state, double *deriv, |
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159 double *delta, int *ires, double *rpar, int *ipar); |
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160 |
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161 }; |
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162 |
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163 #endif |
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164 |
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165 /* |
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166 ;;; Local Variables: *** |
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167 ;;; mode: C++ *** |
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168 ;;; End: *** |
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169 */ |
