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1 // f-hess.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1993, 1994 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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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include "dbleHESS.h" |
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29 #include "CmplxHESS.h" |
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30 |
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31 #include "tree-const.h" |
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32 #include "user-prefs.h" |
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33 #include "error.h" |
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34 #include "gripes.h" |
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35 #include "f-hess.h" |
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36 |
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37 #ifdef WITH_DLD |
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38 tree_constant * |
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39 builtin_hess_2 (const tree_constant *args, int nargin, int nargout) |
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40 { |
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41 return hess (args, nargin, nargout); |
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42 } |
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43 #endif |
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44 |
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45 tree_constant * |
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46 hess (const tree_constant *args, int nargin, int nargout) |
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47 { |
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48 tree_constant *retval = NULL_TREE_CONST; |
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49 |
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50 tree_constant arg = args[1].make_numeric (); |
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51 |
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52 int a_nr = arg.rows (); |
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53 int a_nc = arg.columns (); |
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54 |
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55 if (a_nr == 0 || a_nc == 0) |
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56 { |
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57 int flag = user_pref.propagate_empty_matrices; |
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58 if (flag != 0) |
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59 { |
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60 if (flag < 0) |
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61 warning ("hess: argument is empty matrix"); |
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62 Matrix m; |
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63 retval = new tree_constant [3]; |
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64 retval[0] = tree_constant (m); |
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65 retval[1] = tree_constant (m); |
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66 } |
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67 else |
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68 error ("hess: empty matrix is invalid as argument"); |
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69 |
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70 return retval; |
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71 } |
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72 |
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73 if (a_nr != a_nc) |
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74 { |
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75 gripe_square_matrix_required ("hess"); |
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76 return retval; |
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77 } |
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78 |
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79 Matrix tmp; |
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80 ComplexMatrix ctmp; |
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81 |
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82 switch (arg.const_type ()) |
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83 { |
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84 case tree_constant_rep::matrix_constant: |
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85 { |
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86 tmp = arg.matrix_value (); |
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87 |
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88 HESS result (tmp); |
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89 |
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90 if (nargout == 1) |
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91 { |
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92 retval = new tree_constant [2]; |
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93 retval[0] = tree_constant (result.hess_matrix ()); |
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94 } |
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95 else |
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96 { |
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97 retval = new tree_constant [3]; |
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98 retval[0] = tree_constant (result.unitary_hess_matrix ()); |
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99 retval[1] = tree_constant (result.hess_matrix ()); |
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100 } |
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101 } |
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102 break; |
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103 case tree_constant_rep::complex_matrix_constant: |
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104 { |
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105 ctmp = arg.complex_matrix_value (); |
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106 |
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107 ComplexHESS result (ctmp); |
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108 |
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109 if (nargout == 1) |
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110 { |
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111 retval = new tree_constant [2]; |
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112 retval[0] = tree_constant (result.hess_matrix ()); |
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113 } |
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114 else |
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115 { |
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116 retval = new tree_constant [3]; |
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117 retval[0] = tree_constant (result.unitary_hess_matrix ()); |
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118 retval[1] = tree_constant (result.hess_matrix ()); |
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119 } |
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120 } |
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121 break; |
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122 case tree_constant_rep::scalar_constant: |
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123 { |
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124 double d = arg.double_value (); |
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125 if (nargout == 1) |
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126 { |
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127 retval = new tree_constant [2]; |
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128 retval[0] = tree_constant (d); |
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129 } |
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130 else |
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131 { |
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132 retval = new tree_constant [3]; |
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133 retval[0] = tree_constant (1); |
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134 retval[1] = tree_constant (d); |
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135 } |
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136 } |
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137 break; |
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138 case tree_constant_rep::complex_scalar_constant: |
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139 { |
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140 Complex c = arg.complex_value (); |
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141 if (nargout == 1) |
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142 { |
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143 retval = new tree_constant [2]; |
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144 retval[0] = tree_constant (c); |
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145 } |
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146 else |
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147 { |
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148 retval = new tree_constant [3]; |
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149 retval[0] = tree_constant (1); |
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150 retval[1] = tree_constant (c); |
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151 } |
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152 } |
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153 break; |
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154 default: |
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155 panic_impossible (); |
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156 break; |
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157 } |
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158 return retval; |
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159 } |
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160 |
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161 /* |
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162 ;;; Local Variables: *** |
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163 ;;; mode: C++ *** |
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164 ;;; page-delimiter: "^/\\*" *** |
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165 ;;; End: *** |
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166 */ |
