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577
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1 /* |
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2 |
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2847
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3 Copyright (C) 1996, 1997 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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2942
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32 #include <strstream.h> |
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1350
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33 |
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34 #ifdef HAVE_UNISTD_H |
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2442
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35 #ifdef HAVE_SYS_TYPES_H |
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577
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36 #include <sys/types.h> |
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2442
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37 #endif |
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577
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38 #include <unistd.h> |
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39 #endif |
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40 |
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2942
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41 #include "str-vec.h" |
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42 |
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2898
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43 #include "defun.h" |
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577
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44 #include "error.h" |
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2530
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45 #include "input.h" |
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1352
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46 #include "oct-obj.h" |
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2891
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47 #include "oct-usr-fcn.h" |
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2956
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48 #include "oct-var-ref.h" |
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2878
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49 #include "ov.h" |
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1742
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50 #include "pager.h" |
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51 #include "pt-cmd.h" |
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2878
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52 #include "pt-const.h" |
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1742
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53 #include "pt-exp.h" |
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2891
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54 #include "pt-id.h" |
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55 #include "pt-indir.h" |
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1742
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56 #include "pt-misc.h" |
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57 #include "pt-mvr.h" |
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2878
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58 #include "pt-pr-code.h" |
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2124
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59 #include "pt-walk.h" |
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2878
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60 #include "toplev.h" |
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2898
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61 #include "utils.h" |
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2204
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62 #include "variables.h" |
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63 |
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1058
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64 // Nonzero means we're breaking out of a loop or function body. |
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577
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65 extern int breaking; |
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66 |
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67 // Nonzero means we're jumping to the end of a loop. |
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68 extern int continuing; |
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69 |
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70 // Nonzero means we're returning from a function. |
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71 extern int returning; |
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72 |
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2898
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73 // If TRUE, turn off printing of results in functions (as if a |
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74 // semicolon has been appended to each statement). |
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75 static bool Vsilent_functions; |
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76 |
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577
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77 // A list of commands to be executed. |
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78 |
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79 tree_statement::~tree_statement (void) |
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80 { |
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2124
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81 delete cmd; |
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82 delete expr; |
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577
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83 } |
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84 |
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1742
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85 int |
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86 tree_statement::line (void) |
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87 { |
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2124
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88 return cmd ? cmd->line () : (expr ? expr->line () : -1); |
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1742
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89 } |
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90 |
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91 int |
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92 tree_statement::column (void) |
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93 { |
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2124
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94 return cmd ? cmd->column () : (expr ? expr->column () : -1); |
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1742
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95 } |
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96 |
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581
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97 void |
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1827
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98 tree_statement::maybe_echo_code (bool in_function_body) |
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1588
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99 { |
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100 if (in_function_body |
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2204
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101 && (Vecho_executing_commands & ECHO_FUNCTIONS)) |
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2124
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102 { |
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2530
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103 tree_print_code tpc (octave_stdout, Vps4); |
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2124
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104 |
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105 accept (tpc); |
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106 } |
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1588
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107 } |
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108 |
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2898
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109 octave_value |
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110 tree_statement::eval (bool silent, bool in_function_body) |
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111 { |
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112 octave_value retval; |
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113 |
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114 bool pf = silent ? false : print_flag; |
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115 |
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116 if (cmd || expr) |
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117 { |
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118 maybe_echo_code (in_function_body); |
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119 |
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120 if (cmd) |
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121 cmd->eval (); |
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122 else |
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123 retval = expr->eval (pf); |
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124 } |
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125 |
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126 return retval; |
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127 } |
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128 |
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129 octave_value_list |
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130 tree_statement::eval (bool silent, int nargout, bool in_function_body) |
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131 { |
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132 bool pf = silent ? false : print_flag; |
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133 |
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134 octave_value_list retval; |
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135 |
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136 if (cmd || expr) |
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137 { |
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138 maybe_echo_code (in_function_body); |
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139 |
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140 if (cmd) |
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141 cmd->eval (); |
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142 else |
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143 { |
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144 if (expr->is_multi_val_ret_expression ()) |
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145 { |
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146 octave_value_list args; |
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147 |
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148 tree_multi_val_ret *t = static_cast<tree_multi_val_ret *> (expr); |
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149 |
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150 retval = t->eval (pf, nargout, args); |
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151 } |
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152 else |
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153 retval = expr->eval (pf); |
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154 } |
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155 } |
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156 |
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157 return retval; |
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158 } |
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159 |
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1588
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160 void |
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2124
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161 tree_statement::accept (tree_walker& tw) |
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581
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162 { |
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2124
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163 tw.visit_statement (*this); |
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581
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164 } |
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165 |
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2086
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166 octave_value |
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2898
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167 tree_statement_list::eval (bool silent) |
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577
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168 { |
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2086
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169 octave_value retval; |
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577
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170 |
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171 if (error_state) |
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172 return retval; |
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173 |
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174 for (Pix p = first (); p != 0; next (p)) |
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175 { |
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176 tree_statement *elt = this->operator () (p); |
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177 |
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2898
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178 bool silent_flag = |
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179 silent ? true : (function_body ? Vsilent_functions : false); |
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180 |
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181 retval = elt->eval (silent_flag, function_body); |
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577
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182 |
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2898
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183 if (error_state) |
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184 break; |
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185 |
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186 if (breaking || continuing) |
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187 break; |
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188 |
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189 if (returning) |
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190 break; |
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191 } |
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577
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192 |
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2898
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193 return retval; |
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194 } |
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195 |
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196 octave_value_list |
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197 tree_statement_list::eval (bool no_print, int nargout) |
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198 { |
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199 octave_value_list retval; |
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1588
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200 |
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2898
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201 if (error_state) |
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202 return retval; |
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203 |
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204 if (nargout > 1) |
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205 { |
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206 for (Pix p = first (); p != 0; next (p)) |
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207 { |
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208 tree_statement *elt = this->operator () (p); |
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209 |
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210 retval = elt->eval (no_print, nargout, function_body); |
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577
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211 |
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212 if (error_state) |
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2898
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213 break; |
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577
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214 |
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215 if (breaking || continuing) |
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216 break; |
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217 |
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218 if (returning) |
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219 break; |
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220 } |
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672
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221 } |
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222 else |
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2898
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223 retval = eval (no_print); |
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672
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224 |
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225 return retval; |
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226 } |
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227 |
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581
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228 void |
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2124
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229 tree_statement_list::accept (tree_walker& tw) |
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581
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230 { |
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2124
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231 tw.visit_statement_list (*this); |
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581
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232 } |
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233 |
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2878
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234 tree_argument_list::~tree_argument_list (void) |
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235 { |
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236 while (! empty ()) |
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237 { |
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238 tree_expression *t = remove_front (); |
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239 delete t; |
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240 } |
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241 } |
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242 |
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2086
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243 octave_value_list |
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577
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244 tree_argument_list::convert_to_const_vector (void) |
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245 { |
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712
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246 int len = length (); |
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577
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247 |
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1358
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248 // XXX FIXME XXX -- would be nice to know in advance how largs args |
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249 // needs to be even when we have a list containing an all_va_args |
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250 // token. |
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922
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251 |
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2086
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252 octave_value_list args; |
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577
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253 args.resize (len); |
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254 |
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255 Pix p = first (); |
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922
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256 int j = 0; |
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712
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257 for (int k = 0; k < len; k++) |
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577
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258 { |
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259 tree_expression *elt = this->operator () (p); |
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260 if (elt) |
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261 { |
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2859
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262 octave_value tmp = elt->eval (); |
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577
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263 if (error_state) |
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264 { |
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265 ::error ("evaluating argument list element number %d", k); |
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2086
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266 args = octave_value_list (); |
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577
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267 break; |
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268 } |
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922
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269 else |
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270 { |
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271 if (tmp.is_all_va_args ()) |
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272 { |
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273 if (curr_function) |
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274 { |
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2086
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275 octave_value_list tva; |
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922
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276 tva = curr_function->octave_all_va_args (); |
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277 int n = tva.length (); |
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278 for (int i = 0; i < n; i++) |
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279 args(j++) = tva(i); |
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280 } |
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281 else |
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282 { |
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283 ::error ("all_va_args is only valid inside functions"); |
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2086
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284 args = octave_value_list (); |
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922
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285 break; |
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286 } |
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287 } |
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288 else |
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289 args(j++) = tmp; |
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290 } |
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577
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291 next (p); |
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292 } |
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293 else |
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294 { |
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2086
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295 args(j++) = octave_value (); |
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577
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296 break; |
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297 } |
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298 } |
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712
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299 |
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927
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300 args.resize (j); |
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301 |
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577
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302 return args; |
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303 } |
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304 |
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2942
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305 string_vector |
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306 tree_argument_list::get_arg_names (void) const |
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307 { |
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308 int len = length (); |
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309 |
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310 string_vector retval (len); |
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311 |
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312 int k = 0; |
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313 |
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314 for (Pix p = first (); p; next (p)) |
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315 { |
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316 tree_expression *elt = this->operator () (p); |
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317 |
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318 strstream str_buf; |
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319 |
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320 tree_print_code pc_buf (str_buf); |
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321 |
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322 elt->accept (pc_buf); |
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323 |
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324 str_buf << ends; |
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325 |
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326 const char *s = str_buf.str (); |
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327 |
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328 retval(k++) = s; |
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329 |
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330 delete [] s; |
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331 } |
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332 |
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333 return retval; |
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334 } |
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335 |
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581
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336 void |
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2124
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337 tree_argument_list::accept (tree_walker& tw) |
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581
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338 { |
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2124
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339 tw.visit_argument_list (*this); |
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581
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340 } |
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341 |
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577
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342 // Parameter lists. |
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343 |
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1742
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344 tree_parameter_list::~tree_parameter_list (void) |
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345 { |
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346 while (! empty ()) |
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347 { |
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348 tree_identifier *t = remove_front (); |
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349 delete t; |
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350 } |
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351 } |
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352 |
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577
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353 void |
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354 tree_parameter_list::mark_as_formal_parameters (void) |
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355 { |
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356 for (Pix p = first (); p != 0; next (p)) |
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357 { |
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358 tree_identifier *elt = this->operator () (p); |
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359 elt->mark_as_formal_parameter (); |
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360 } |
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361 } |
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362 |
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363 void |
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2086
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364 tree_parameter_list::initialize_undefined_elements (octave_value& val) |
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1093
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365 { |
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366 for (Pix p = first (); p != 0; next (p)) |
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367 { |
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368 tree_identifier *elt = this->operator () (p); |
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2948
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369 |
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1093
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370 if (! elt->is_defined ()) |
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2948
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371 elt->reference () . assign (octave_value::asn_eq, val); |
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1093
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372 } |
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373 } |
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374 |
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375 void |
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2086
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376 tree_parameter_list::define_from_arg_vector (const octave_value_list& args) |
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577
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377 { |
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712
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378 int nargin = args.length (); |
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379 |
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380 if (nargin <= 0) |
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577
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381 return; |
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382 |
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712
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383 int expected_nargin = length (); |
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577
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384 |
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385 Pix p = first (); |
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386 |
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712
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387 for (int i = 0; i < expected_nargin; i++) |
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577
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388 { |
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389 tree_identifier *elt = this->operator () (p); |
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390 |
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2959
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391 octave_variable_reference ref = elt->reference (); |
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392 |
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577
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393 if (i < nargin) |
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394 { |
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620
|
395 if (args(i).is_defined () && args(i).is_magic_colon ()) |
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577
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396 { |
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397 ::error ("invalid use of colon in function argument list"); |
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398 return; |
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399 } |
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2891
|
400 |
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2959
|
401 ref.assign (octave_value::asn_eq, args(i)); |
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577
|
402 } |
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2891
|
403 else |
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2959
|
404 ref.assign (octave_value::asn_eq, octave_value ()); |
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577
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405 |
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406 next (p); |
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407 } |
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408 } |
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409 |
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2086
|
410 octave_value_list |
|
723
|
411 tree_parameter_list::convert_to_const_vector (tree_va_return_list *vr_list) |
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577
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412 { |
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413 int nout = length (); |
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414 |
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723
|
415 if (vr_list) |
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416 nout += vr_list->length (); |
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417 |
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2086
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418 octave_value_list retval; |
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577
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419 retval.resize (nout); |
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420 |
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421 int i = 0; |
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422 |
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423 for (Pix p = first (); p != 0; next (p)) |
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424 { |
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425 tree_identifier *elt = this->operator () (p); |
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426 |
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427 if (elt->is_defined ()) |
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2859
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428 retval(i) = elt->eval (); |
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577
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429 |
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430 i++; |
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431 } |
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432 |
|
723
|
433 if (vr_list) |
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434 { |
|
1321
|
435 for (Pix p = vr_list->first (); p != 0; vr_list->next (p)) |
|
723
|
436 { |
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437 retval(i) = vr_list->operator () (p); |
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438 i++; |
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439 } |
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440 } |
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441 |
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577
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442 return retval; |
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443 } |
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444 |
|
1827
|
445 bool |
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577
|
446 tree_parameter_list::is_defined (void) |
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|
447 { |
|
1827
|
448 bool status = true; |
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577
|
449 |
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450 for (Pix p = first (); p != 0; next (p)) |
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451 { |
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452 tree_identifier *elt = this->operator () (p); |
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453 |
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454 if (! elt->is_defined ()) |
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455 { |
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1827
|
456 status = false; |
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577
|
457 break; |
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458 } |
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459 } |
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460 |
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461 return status; |
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462 } |
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463 |
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|
464 void |
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2124
|
465 tree_parameter_list::accept (tree_walker& tw) |
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581
|
466 { |
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2124
|
467 tw.visit_parameter_list (*this); |
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581
|
468 } |
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469 |
|
|
470 // Return lists. |
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471 |
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1742
|
472 tree_return_list::~tree_return_list (void) |
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|
473 { |
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|
474 while (! empty ()) |
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|
475 { |
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|
476 tree_index_expression *t = remove_front (); |
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|
477 delete t; |
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|
478 } |
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|
479 } |
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480 |
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581
|
481 void |
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2124
|
482 tree_return_list::accept (tree_walker& tw) |
|
581
|
483 { |
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2124
|
484 tw.visit_return_list (*this); |
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581
|
485 } |
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|
486 |
|
2846
|
487 // Declarations (global, static, etc.). |
|
581
|
488 |
|
2846
|
489 tree_decl_elt::~tree_decl_elt (void) |
|
1742
|
490 { |
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2124
|
491 delete id; |
|
|
492 delete ass_expr; |
|
1742
|
493 } |
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|
494 |
|
581
|
495 void |
|
2846
|
496 tree_decl_elt::accept (tree_walker& tw) |
|
577
|
497 { |
|
2846
|
498 tw.visit_decl_elt (*this); |
|
|
499 } |
|
|
500 |
|
|
501 // Initializer lists for declaration statements. |
|
|
502 |
|
|
503 void |
|
|
504 tree_decl_init_list::eval (tree_decl_elt::eval_fcn f, bool skip_init) |
|
|
505 { |
|
|
506 for (Pix p = first (); p != 0; next (p)) |
|
577
|
507 { |
|
2846
|
508 f (*(this->operator () (p)), skip_init); |
|
2124
|
509 |
|
2846
|
510 if (error_state) |
|
|
511 break; |
|
577
|
512 } |
|
|
513 } |
|
|
514 |
|
|
515 void |
|
2846
|
516 tree_decl_init_list::accept (tree_walker& tw) |
|
577
|
517 { |
|
2846
|
518 tw.visit_decl_init_list (*this); |
|
581
|
519 } |
|
|
520 |
|
|
521 // If. |
|
|
522 |
|
1742
|
523 tree_if_clause::~tree_if_clause (void) |
|
|
524 { |
|
|
525 delete expr; |
|
|
526 delete list; |
|
|
527 } |
|
|
528 |
|
577
|
529 int |
|
|
530 tree_if_clause::eval (void) |
|
|
531 { |
|
1491
|
532 if (is_else_clause () || expr->is_logically_true ("if")) |
|
577
|
533 { |
|
|
534 if (list) |
|
2898
|
535 list->eval (); |
|
577
|
536 |
|
|
537 return 1; |
|
|
538 } |
|
|
539 |
|
|
540 return 0; |
|
|
541 } |
|
|
542 |
|
|
543 void |
|
2124
|
544 tree_if_clause::accept (tree_walker& tw) |
|
581
|
545 { |
|
2124
|
546 tw.visit_if_clause (*this); |
|
581
|
547 } |
|
|
548 |
|
|
549 // List of if commands. |
|
|
550 |
|
|
551 void |
|
577
|
552 tree_if_command_list::eval (void) |
|
|
553 { |
|
|
554 for (Pix p = first (); p != 0; next (p)) |
|
|
555 { |
|
|
556 tree_if_clause *t = this->operator () (p); |
|
|
557 |
|
|
558 if (t->eval () || error_state) |
|
|
559 break; |
|
|
560 } |
|
|
561 } |
|
|
562 |
|
581
|
563 void |
|
2124
|
564 tree_if_command_list::accept (tree_walker& tw) |
|
581
|
565 { |
|
2124
|
566 tw.visit_if_command_list (*this); |
|
581
|
567 } |
|
|
568 |
|
2764
|
569 // Switch. |
|
|
570 |
|
|
571 tree_switch_case::~tree_switch_case (void) |
|
|
572 { |
|
|
573 delete label; |
|
|
574 delete list; |
|
|
575 } |
|
|
576 |
|
|
577 bool |
|
|
578 tree_switch_case::label_matches (const octave_value& val) |
|
|
579 { |
|
|
580 bool retval = false; |
|
|
581 |
|
2859
|
582 octave_value label_value = label->eval (); |
|
2764
|
583 |
|
|
584 if (! error_state) |
|
|
585 { |
|
|
586 if (label_value.is_defined ()) |
|
|
587 { |
|
|
588 octave_value tmp = do_binary_op (octave_value::eq, |
|
|
589 val, label_value); |
|
|
590 |
|
|
591 if (! error_state) |
|
|
592 { |
|
|
593 if (tmp.is_defined ()) |
|
|
594 retval = tmp.is_true (); |
|
|
595 else |
|
|
596 eval_error (); |
|
|
597 } |
|
|
598 else |
|
|
599 eval_error (); |
|
|
600 } |
|
|
601 else |
|
|
602 eval_error (); |
|
|
603 } |
|
|
604 else |
|
|
605 eval_error (); |
|
|
606 |
|
|
607 return retval; |
|
|
608 } |
|
|
609 |
|
|
610 int |
|
|
611 tree_switch_case::eval (const octave_value& val) |
|
|
612 { |
|
|
613 int retval = 0; |
|
|
614 |
|
|
615 if (is_default_case () || label_matches (val)) |
|
|
616 { |
|
|
617 if (list) |
|
2898
|
618 list->eval (); |
|
2764
|
619 |
|
|
620 retval = 1; |
|
|
621 } |
|
|
622 |
|
|
623 return retval; |
|
|
624 } |
|
|
625 |
|
|
626 void |
|
|
627 tree_switch_case::eval_error (void) |
|
|
628 { |
|
|
629 ::error ("evaluating switch case label"); |
|
|
630 } |
|
|
631 |
|
|
632 void |
|
|
633 tree_switch_case::accept (tree_walker& tw) |
|
|
634 { |
|
|
635 tw.visit_switch_case (*this); |
|
|
636 } |
|
|
637 |
|
|
638 // List of switch cases. |
|
|
639 |
|
|
640 void |
|
|
641 tree_switch_case_list::eval (const octave_value& val) |
|
|
642 { |
|
|
643 for (Pix p = first (); p != 0; next (p)) |
|
|
644 { |
|
|
645 tree_switch_case *t = this->operator () (p); |
|
|
646 |
|
|
647 if (t->eval (val) || error_state) |
|
|
648 break; |
|
|
649 } |
|
|
650 } |
|
|
651 |
|
|
652 void |
|
|
653 tree_switch_case_list::accept (tree_walker& tw) |
|
|
654 { |
|
|
655 tw.visit_switch_case_list (*this); |
|
|
656 } |
|
|
657 |
|
2898
|
658 static int |
|
|
659 silent_functions (void) |
|
|
660 { |
|
|
661 Vsilent_functions = check_preference ("silent_functions"); |
|
|
662 |
|
|
663 return 0; |
|
|
664 } |
|
|
665 |
|
|
666 void |
|
|
667 symbols_of_pt_misc (void) |
|
|
668 { |
|
|
669 DEFVAR (silent_functions, 0.0, 0, silent_functions, |
|
|
670 "suppress printing results in called functions"); |
|
|
671 } |
|
|
672 |
|
577
|
673 /* |
|
|
674 ;;; Local Variables: *** |
|
|
675 ;;; mode: C++ *** |
|
|
676 ;;; End: *** |
|
|
677 */ |
