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1 // tc-hess.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1993 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 2, or (at your option) any |
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11 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, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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24 #ifdef __GNUG__ |
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25 #pragma implementation |
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26 #endif |
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27 |
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28 #include "Matrix.h" |
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29 |
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30 #include "tree-const.h" |
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31 #include "user-prefs.h" |
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32 #include "error.h" |
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33 #include "gripes.h" |
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34 |
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35 #ifdef WITH_DLD |
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36 tree_constant * |
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37 builtin_hess_2 (tree_constant *args, int nargin, int nargout) |
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38 { |
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39 return hess (args, nargin, nargout); |
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40 } |
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41 #endif |
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42 |
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43 tree_constant * |
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44 hess (tree_constant *args, int nargin, int nargout) |
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45 { |
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46 tree_constant *retval = NULL_TREE_CONST; |
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47 |
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48 tree_constant arg = args[1].make_numeric (); |
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49 |
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50 int a_nr = arg.rows (); |
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51 int a_nc = arg.columns (); |
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52 |
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53 if (a_nr == 0 || a_nc == 0) |
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54 { |
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55 int flag = user_pref.propagate_empty_matrices; |
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56 if (flag != 0) |
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57 { |
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58 if (flag < 0) |
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59 warning ("hess: argument is empty matrix"); |
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60 Matrix m; |
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61 retval = new tree_constant [3]; |
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62 retval[0] = tree_constant (m); |
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63 retval[1] = tree_constant (m); |
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64 } |
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65 else |
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66 error ("hess: empty matrix is invalid as argument"); |
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67 |
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68 return retval; |
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69 } |
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70 |
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71 if (a_nr != a_nc) |
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72 { |
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73 gripe_square_matrix_required ("hess"); |
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74 return retval; |
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75 } |
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76 |
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77 Matrix tmp; |
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78 ComplexMatrix ctmp; |
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79 |
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80 switch (arg.const_type ()) |
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81 { |
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82 case tree_constant_rep::matrix_constant: |
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83 { |
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84 tmp = arg.matrix_value (); |
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85 |
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86 HESS result (tmp); |
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87 |
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88 if (nargout == 1) |
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89 { |
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90 retval = new tree_constant [2]; |
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91 retval[0] = tree_constant (result.hess_matrix ()); |
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92 } |
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93 else |
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94 { |
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95 retval = new tree_constant [3]; |
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96 retval[0] = tree_constant (result.unitary_hess_matrix ()); |
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97 retval[1] = tree_constant (result.hess_matrix ()); |
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98 } |
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99 } |
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100 break; |
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101 case tree_constant_rep::complex_matrix_constant: |
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102 { |
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103 ctmp = arg.complex_matrix_value (); |
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104 |
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105 ComplexHESS result (ctmp); |
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106 |
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107 if (nargout == 1) |
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108 { |
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109 retval = new tree_constant [2]; |
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110 retval[0] = tree_constant (result.hess_matrix ()); |
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111 } |
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112 else |
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113 { |
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114 retval = new tree_constant [3]; |
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115 retval[0] = tree_constant (result.unitary_hess_matrix ()); |
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116 retval[1] = tree_constant (result.hess_matrix ()); |
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117 } |
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118 } |
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119 break; |
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120 case tree_constant_rep::scalar_constant: |
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121 { |
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122 double d = arg.double_value (); |
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123 if (nargout == 1) |
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124 { |
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125 retval = new tree_constant [2]; |
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126 retval[0] = tree_constant (d); |
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127 } |
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128 else |
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129 { |
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130 retval = new tree_constant [3]; |
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131 retval[0] = tree_constant (1); |
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132 retval[1] = tree_constant (d); |
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133 } |
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134 } |
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135 break; |
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136 case tree_constant_rep::complex_scalar_constant: |
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137 { |
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138 Complex c = arg.complex_value (); |
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139 if (nargout == 1) |
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140 { |
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141 retval = new tree_constant [2]; |
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142 retval[0] = tree_constant (c); |
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143 } |
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144 else |
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145 { |
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146 retval = new tree_constant [3]; |
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147 retval[0] = tree_constant (1); |
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148 retval[1] = tree_constant (c); |
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149 } |
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150 } |
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151 break; |
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152 default: |
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153 panic_impossible (); |
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154 break; |
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155 } |
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156 return retval; |
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157 } |
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158 |
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159 /* |
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160 ;;; Local Variables: *** |
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161 ;;; mode: C++ *** |
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162 ;;; page-delimiter: "^/\\*" *** |
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163 ;;; End: *** |
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164 */ |
