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1 /* |
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2 |
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1827
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3 Copyright (C) 1996 John W. Eaton |
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577
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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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1297
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23 #if defined (__GNUG__) |
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24 #pragma implementation |
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25 #endif |
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26 |
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577
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27 #ifdef HAVE_CONFIG_H |
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1192
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28 #include <config.h> |
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577
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29 #endif |
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30 |
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1350
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31 #include <iostream.h> |
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32 |
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33 #ifdef HAVE_UNISTD_H |
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34 #include <sys/types.h> |
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35 #include <unistd.h> |
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36 #endif |
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37 |
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38 #include "error.h" |
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1352
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39 #include "oct-obj.h" |
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1742
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40 #include "pager.h" |
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1670
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41 #include "toplev.h" |
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1742
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42 #include "pt-cmd.h" |
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43 #include "pt-const.h" |
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44 #include "pt-exp.h" |
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45 #include "pt-fcn.h" |
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46 #include "pt-fvc.h" |
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47 #include "pt-misc.h" |
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48 #include "pt-mvr.h" |
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577
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49 #include "user-prefs.h" |
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50 |
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1058
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51 // Nonzero means we're breaking out of a loop or function body. |
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52 extern int breaking; |
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53 |
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54 // Nonzero means we're jumping to the end of a loop. |
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55 extern int continuing; |
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56 |
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57 // Nonzero means we're returning from a function. |
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58 extern int returning; |
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59 |
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60 // A list of commands to be executed. |
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61 |
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62 tree_statement::~tree_statement (void) |
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63 { |
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64 delete command; |
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65 delete expression; |
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66 } |
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67 |
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1742
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68 int |
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69 tree_statement::line (void) |
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70 { |
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71 return command |
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72 ? command->line () : (expression ? expression->line () : -1); |
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73 } |
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74 |
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75 int |
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76 tree_statement::column (void) |
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77 { |
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78 return command |
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79 ? command->column () : (expression ? expression->column () : -1); |
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80 } |
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81 |
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581
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82 void |
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1827
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83 tree_statement::maybe_echo_code (bool in_function_body) |
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1588
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84 { |
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85 if (in_function_body |
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86 && (user_pref.echo_executing_commands & ECHO_FUNCTIONS)) |
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2095
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87 print_code (octave_stdout); |
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1588
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88 } |
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89 |
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90 void |
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581
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91 tree_statement::print_code (ostream& os) |
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92 { |
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93 if (command) |
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94 { |
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95 command->print_code (os); |
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96 |
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97 if (! print_flag) |
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98 os << ";"; |
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99 |
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100 command->print_code_new_line (os); |
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101 } |
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102 else if (expression) |
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103 { |
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104 expression->print_code (os); |
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105 |
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106 if (! print_flag) |
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107 os << ";"; |
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108 |
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109 expression->print_code_new_line (os); |
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110 } |
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111 } |
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112 |
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2086
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113 octave_value |
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114 tree_statement_list::eval (bool print) |
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115 { |
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116 bool pf; |
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117 octave_value retval; |
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118 |
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119 if (error_state) |
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120 return retval; |
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121 |
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122 for (Pix p = first (); p != 0; next (p)) |
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123 { |
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124 tree_statement *elt = this->operator () (p); |
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125 |
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126 if (! print) |
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127 pf = false; |
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128 else |
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129 pf = elt->print_flag; |
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130 |
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131 tree_command *cmd = elt->command; |
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132 tree_expression *expr = elt->expression; |
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133 |
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134 if (cmd || expr) |
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135 { |
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136 elt->maybe_echo_code (function_body); |
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137 |
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577
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138 if (cmd) |
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139 cmd->eval (); |
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140 else |
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141 retval = expr->eval (pf); |
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142 |
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143 if (error_state) |
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144 return octave_value (); |
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145 |
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146 if (breaking || continuing) |
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147 break; |
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148 |
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149 if (returning) |
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150 break; |
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151 } |
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152 else |
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153 retval = octave_value (); |
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154 } |
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155 return retval; |
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156 } |
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157 |
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2086
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158 octave_value_list |
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159 tree_statement_list::eval (bool print, int nargout) |
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672
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160 { |
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2086
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161 octave_value_list retval; |
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672
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162 |
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163 if (nargout > 1) |
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164 { |
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165 bool pf; |
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672
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166 |
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167 if (error_state) |
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168 return retval; |
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169 |
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170 for (Pix p = first (); p != 0; next (p)) |
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171 { |
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172 tree_statement *elt = this->operator () (p); |
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173 |
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1827
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174 if (! print) |
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175 pf = false; |
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672
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176 else |
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177 pf = elt->print_flag; |
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178 |
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179 tree_command *cmd = elt->command; |
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180 tree_expression *expr = elt->expression; |
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181 |
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182 if (cmd || expr) |
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183 { |
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184 elt->maybe_echo_code (function_body); |
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185 |
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672
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186 if (cmd) |
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187 cmd->eval (); |
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188 else |
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189 { |
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190 if (expr->is_multi_val_ret_expression ()) |
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191 { |
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2086
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192 octave_value_list args; |
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672
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193 tree_multi_val_ret *t = (tree_multi_val_ret *) expr; |
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194 retval = t->eval (pf, nargout, args); |
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195 } |
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196 else |
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197 retval = expr->eval (pf); |
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198 } |
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199 |
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200 if (error_state) |
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2086
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201 return octave_value (); |
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672
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202 |
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203 if (breaking || continuing) |
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204 break; |
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205 |
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206 if (returning) |
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207 break; |
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208 } |
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209 else |
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2086
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210 retval = octave_value_list (); |
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672
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211 } |
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212 return retval; |
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213 } |
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214 else |
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215 retval = eval (print); |
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216 |
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217 return retval; |
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218 } |
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219 |
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581
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220 void |
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221 tree_statement_list::print_code (ostream& os) |
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222 { |
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223 for (Pix p = first (); p != 0; next (p)) |
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224 { |
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225 tree_statement *elt = this->operator () (p); |
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226 |
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227 if (elt) |
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228 elt->print_code (os); |
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229 } |
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230 } |
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231 |
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2086
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232 octave_value_list |
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577
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233 tree_argument_list::convert_to_const_vector (void) |
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234 { |
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712
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235 int len = length (); |
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577
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236 |
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1358
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237 // XXX FIXME XXX -- would be nice to know in advance how largs args |
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238 // needs to be even when we have a list containing an all_va_args |
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239 // token. |
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240 |
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2086
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241 octave_value_list args; |
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577
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242 args.resize (len); |
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243 |
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244 Pix p = first (); |
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245 int j = 0; |
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712
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246 for (int k = 0; k < len; k++) |
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577
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247 { |
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248 tree_expression *elt = this->operator () (p); |
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249 if (elt) |
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250 { |
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251 octave_value tmp = elt->eval (false); |
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577
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252 if (error_state) |
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253 { |
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254 ::error ("evaluating argument list element number %d", k); |
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2086
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255 args = octave_value_list (); |
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577
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256 break; |
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257 } |
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922
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258 else |
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259 { |
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260 if (tmp.is_all_va_args ()) |
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261 { |
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262 if (curr_function) |
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263 { |
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2086
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264 octave_value_list tva; |
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922
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265 tva = curr_function->octave_all_va_args (); |
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266 int n = tva.length (); |
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267 for (int i = 0; i < n; i++) |
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268 args(j++) = tva(i); |
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269 } |
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270 else |
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271 { |
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272 ::error ("all_va_args is only valid inside functions"); |
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2086
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273 args = octave_value_list (); |
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274 break; |
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275 } |
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276 } |
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277 else |
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278 args(j++) = tmp; |
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279 } |
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577
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280 next (p); |
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281 } |
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282 else |
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283 { |
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2086
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284 args(j++) = octave_value (); |
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577
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285 break; |
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286 } |
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287 } |
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712
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288 |
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927
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289 args.resize (j); |
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290 |
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577
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291 return args; |
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292 } |
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293 |
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581
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294 void |
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295 tree_argument_list::print_code (ostream& os) |
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296 { |
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297 Pix p = first (); |
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298 |
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299 while (p) |
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300 { |
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301 tree_expression *elt = this->operator () (p); |
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302 |
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303 next (p); |
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304 |
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305 if (elt) |
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306 { |
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307 elt->print_code (os); |
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308 |
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309 if (p) |
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310 os << ", "; |
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311 } |
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312 } |
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313 } |
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314 |
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577
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315 // Parameter lists. |
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316 |
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1742
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317 tree_parameter_list::~tree_parameter_list (void) |
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318 { |
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319 while (! empty ()) |
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320 { |
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321 tree_identifier *t = remove_front (); |
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322 delete t; |
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323 } |
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324 } |
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325 |
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577
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326 void |
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327 tree_parameter_list::mark_as_formal_parameters (void) |
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328 { |
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329 for (Pix p = first (); p != 0; next (p)) |
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330 { |
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331 tree_identifier *elt = this->operator () (p); |
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332 elt->mark_as_formal_parameter (); |
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333 } |
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334 } |
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335 |
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336 void |
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2086
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337 tree_parameter_list::initialize_undefined_elements (octave_value& val) |
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1093
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338 { |
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339 for (Pix p = first (); p != 0; next (p)) |
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340 { |
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341 tree_identifier *elt = this->operator () (p); |
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342 if (! elt->is_defined ()) |
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343 elt->assign (val); |
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344 } |
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345 } |
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346 |
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347 void |
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2086
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348 tree_parameter_list::define_from_arg_vector (const octave_value_list& args) |
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577
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349 { |
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712
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350 int nargin = args.length (); |
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351 |
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352 if (nargin <= 0) |
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577
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353 return; |
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354 |
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712
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355 int expected_nargin = length (); |
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577
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356 |
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357 Pix p = first (); |
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358 |
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712
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359 for (int i = 0; i < expected_nargin; i++) |
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577
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360 { |
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361 tree_identifier *elt = this->operator () (p); |
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362 |
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2086
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363 octave_value *tmp = 0; |
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577
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364 |
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365 if (i < nargin) |
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366 { |
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620
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367 if (args(i).is_defined () && args(i).is_magic_colon ()) |
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577
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368 { |
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369 ::error ("invalid use of colon in function argument list"); |
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370 return; |
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371 } |
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2086
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372 tmp = new octave_value (args(i)); |
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577
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373 } |
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374 |
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375 elt->define (tmp); |
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376 |
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377 next (p); |
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378 } |
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379 } |
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380 |
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2086
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381 octave_value_list |
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723
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382 tree_parameter_list::convert_to_const_vector (tree_va_return_list *vr_list) |
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577
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383 { |
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384 int nout = length (); |
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385 |
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723
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386 if (vr_list) |
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387 nout += vr_list->length (); |
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388 |
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2086
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389 octave_value_list retval; |
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577
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390 retval.resize (nout); |
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391 |
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392 int i = 0; |
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393 |
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394 for (Pix p = first (); p != 0; next (p)) |
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395 { |
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396 tree_identifier *elt = this->operator () (p); |
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397 |
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398 if (elt->is_defined ()) |
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1827
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399 retval(i) = elt->eval (false); |
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577
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400 |
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401 i++; |
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402 } |
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403 |
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723
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404 if (vr_list) |
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405 { |
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1321
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406 for (Pix p = vr_list->first (); p != 0; vr_list->next (p)) |
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723
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407 { |
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408 retval(i) = vr_list->operator () (p); |
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409 i++; |
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410 } |
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411 } |
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412 |
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577
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413 return retval; |
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414 } |
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415 |
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1827
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416 bool |
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577
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417 tree_parameter_list::is_defined (void) |
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418 { |
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1827
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419 bool status = true; |
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577
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420 |
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421 for (Pix p = first (); p != 0; next (p)) |
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422 { |
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423 tree_identifier *elt = this->operator () (p); |
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424 |
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425 if (! elt->is_defined ()) |
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426 { |
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1827
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427 status = false; |
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577
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428 break; |
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429 } |
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430 } |
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431 |
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432 return status; |
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433 } |
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434 |
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435 void |
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581
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436 tree_parameter_list::print_code (ostream& os) |
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437 { |
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438 Pix p = first (); |
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439 |
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440 while (p) |
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441 { |
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442 tree_identifier *elt = this->operator () (p); |
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443 |
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444 next (p); |
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445 |
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446 if (elt) |
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447 { |
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448 elt->print_code (os); |
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449 |
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450 if (p) |
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451 os << ", "; |
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452 } |
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453 } |
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454 } |
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455 |
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456 // Return lists. |
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457 |
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1742
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458 tree_return_list::~tree_return_list (void) |
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459 { |
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460 while (! empty ()) |
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461 { |
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462 tree_index_expression *t = remove_front (); |
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463 delete t; |
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464 } |
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465 } |
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466 |
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581
|
467 void |
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468 tree_return_list::print_code (ostream& os) |
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469 { |
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470 Pix p = first (); |
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471 |
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472 while (p) |
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473 { |
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474 tree_index_expression *elt = this->operator () (p); |
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475 |
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476 next (p); |
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477 |
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478 if (elt) |
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479 { |
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480 elt->print_code (os); |
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481 |
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482 if (p) |
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483 os << ", "; |
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484 } |
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485 } |
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486 } |
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487 |
|
|
488 // Global. |
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489 |
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1742
|
490 tree_global::~tree_global (void) |
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|
491 { |
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|
492 delete ident; |
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|
493 delete assign_expr; |
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|
494 } |
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495 |
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581
|
496 void |
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577
|
497 tree_global::eval (void) |
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|
498 { |
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|
499 if (ident) |
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500 { |
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|
501 ident->link_to_global (); |
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502 } |
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|
503 else if (assign_expr) |
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|
504 { |
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745
|
505 tree_identifier *id = 0; |
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|
506 if (assign_expr->left_hand_side_is_identifier_only () |
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|
507 && (id = assign_expr->left_hand_side_id ())) |
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|
508 { |
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|
509 id->link_to_global (); |
|
1827
|
510 assign_expr->eval (false); |
|
745
|
511 } |
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|
512 else |
|
|
513 error ("global: unable to make individual structure elements global"); |
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577
|
514 } |
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515 } |
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516 |
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|
517 void |
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581
|
518 tree_global::print_code (ostream& os) |
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|
519 { |
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|
520 if (ident) |
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|
521 ident->print_code (os); |
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|
522 |
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|
523 if (assign_expr) |
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|
524 assign_expr->print_code (os); |
|
|
525 } |
|
|
526 |
|
|
527 // Global initializer lists. |
|
|
528 |
|
|
529 void |
|
577
|
530 tree_global_init_list::eval (void) |
|
|
531 { |
|
|
532 for (Pix p = first (); p != 0; next (p)) |
|
|
533 { |
|
|
534 tree_global *t = this->operator () (p); |
|
|
535 t->eval (); |
|
|
536 } |
|
|
537 } |
|
|
538 |
|
581
|
539 void |
|
|
540 tree_global_init_list::print_code (ostream& os) |
|
|
541 { |
|
|
542 Pix p = first (); |
|
|
543 |
|
|
544 while (p) |
|
|
545 { |
|
|
546 tree_global *elt = this->operator () (p); |
|
|
547 |
|
|
548 next (p); |
|
|
549 |
|
|
550 if (elt) |
|
|
551 { |
|
|
552 elt->print_code (os); |
|
|
553 |
|
|
554 if (p) |
|
|
555 os << ", "; |
|
|
556 } |
|
|
557 } |
|
|
558 } |
|
|
559 |
|
|
560 // If. |
|
|
561 |
|
1742
|
562 tree_if_clause::~tree_if_clause (void) |
|
|
563 { |
|
|
564 delete expr; |
|
|
565 delete list; |
|
|
566 } |
|
|
567 |
|
577
|
568 int |
|
|
569 tree_if_clause::eval (void) |
|
|
570 { |
|
1491
|
571 if (is_else_clause () || expr->is_logically_true ("if")) |
|
577
|
572 { |
|
|
573 if (list) |
|
1827
|
574 list->eval (true); |
|
577
|
575 |
|
|
576 return 1; |
|
|
577 } |
|
|
578 |
|
|
579 return 0; |
|
|
580 } |
|
|
581 |
|
|
582 void |
|
581
|
583 tree_if_clause::print_code (ostream& os) |
|
|
584 { |
|
|
585 if (expr) |
|
1063
|
586 expr->print_code (os); |
|
581
|
587 |
|
1063
|
588 print_code_new_line (os); |
|
1588
|
589 |
|
1063
|
590 increment_indent_level (); |
|
581
|
591 |
|
|
592 if (list) |
|
|
593 { |
|
|
594 list->print_code (os); |
|
|
595 |
|
|
596 decrement_indent_level (); |
|
|
597 } |
|
|
598 } |
|
|
599 |
|
|
600 // List of if commands. |
|
|
601 |
|
|
602 void |
|
577
|
603 tree_if_command_list::eval (void) |
|
|
604 { |
|
|
605 for (Pix p = first (); p != 0; next (p)) |
|
|
606 { |
|
|
607 tree_if_clause *t = this->operator () (p); |
|
|
608 |
|
|
609 if (t->eval () || error_state) |
|
|
610 break; |
|
|
611 } |
|
|
612 } |
|
|
613 |
|
581
|
614 void |
|
|
615 tree_if_command_list::print_code (ostream& os) |
|
|
616 { |
|
|
617 Pix p = first (); |
|
|
618 |
|
1827
|
619 bool first_elt = true; |
|
581
|
620 |
|
|
621 while (p) |
|
|
622 { |
|
|
623 tree_if_clause *elt = this->operator () (p); |
|
|
624 |
|
|
625 if (elt) |
|
|
626 { |
|
1063
|
627 if (! first_elt) |
|
581
|
628 { |
|
|
629 print_code_indent (os); |
|
|
630 |
|
1063
|
631 if (elt->is_else_clause ()) |
|
|
632 os << "else"; |
|
|
633 else |
|
|
634 os << "elseif "; |
|
581
|
635 } |
|
|
636 |
|
|
637 elt->print_code (os); |
|
|
638 } |
|
|
639 |
|
1827
|
640 first_elt = false; |
|
1063
|
641 next (p); |
|
581
|
642 } |
|
|
643 } |
|
|
644 |
|
577
|
645 /* |
|
|
646 ;;; Local Variables: *** |
|
|
647 ;;; mode: C++ *** |
|
|
648 ;;; End: *** |
|
|
649 */ |
