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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 2000, 2002, 2003, 2005, 2007 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 #if !defined (octave_base_de_h) |
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24 #define octave_base_de_h 1 |
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25 |
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26 #include <string> |
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27 |
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28 #include "dColVector.h" |
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29 #include "dMatrix.h" |
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30 |
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31 class |
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32 base_diff_eqn |
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33 { |
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34 public: |
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35 |
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36 base_diff_eqn (void) |
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37 : x (), t (0.0), stop_time (0.0), stop_time_set (false), |
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38 restart (true), integration_error (false), istate (0) { } |
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39 |
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40 base_diff_eqn (const ColumnVector& xx, double tt) |
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41 : x (xx), t (tt), stop_time (0.0), stop_time_set (false), |
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42 restart (true), integration_error (false), istate (0) { } |
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43 |
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44 base_diff_eqn (const base_diff_eqn& a) |
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45 : x (a.x), t (a.t), stop_time (0.0), stop_time_set (false), |
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46 restart (true), integration_error (false), istate (0) { } |
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47 |
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48 virtual ~base_diff_eqn (void) { } |
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49 |
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50 base_diff_eqn& operator = (const base_diff_eqn& a) |
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51 { |
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52 if (this != &a) |
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53 { |
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54 x = a.x; |
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55 t = a.t; |
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56 stop_time = a.stop_time; |
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57 stop_time_set = a.stop_time_set; |
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58 restart = a.restart; |
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59 integration_error = a.integration_error; |
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60 istate = a.istate; |
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61 } |
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62 |
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63 return *this; |
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64 } |
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65 |
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66 void initialize (const ColumnVector& x0, double t0) |
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67 { |
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68 x = x0; |
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69 t = t0; |
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70 integration_error = false; |
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71 istate = 0; |
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72 force_restart (); |
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73 } |
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74 |
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75 octave_idx_type size (void) const { return x.capacity (); } |
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76 |
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77 ColumnVector state (void) const { return x; } |
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78 |
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79 double time (void) const { return t; } |
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80 |
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81 void set_stop_time (double tt) |
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82 { |
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83 stop_time_set = true; |
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84 stop_time = tt; |
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85 force_restart (); |
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86 } |
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87 |
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88 void clear_stop_time (void) |
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89 { |
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90 stop_time_set = false; |
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91 force_restart (); |
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92 } |
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93 |
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94 virtual void force_restart (void) { restart = true; } |
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95 |
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96 bool integration_ok (void) const { return ! integration_error; } |
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97 |
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98 octave_idx_type integration_state (void) const { return istate; } |
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99 |
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100 virtual std::string error_message (void) const = 0; |
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101 |
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102 protected: |
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103 |
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104 ColumnVector x; |
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105 |
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106 double t; |
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107 |
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108 double stop_time; |
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109 |
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110 bool stop_time_set; |
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111 |
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112 bool restart; |
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113 |
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114 bool integration_error; |
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115 |
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116 octave_idx_type istate; |
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117 }; |
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118 |
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119 #endif |
