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1 /* |
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2 |
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1884
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 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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1315
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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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240
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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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29 #endif |
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30 |
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1962
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31 #include <cctype> |
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32 |
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1792
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33 #include "oct-glob.h" |
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1755
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34 #include "str-vec.h" |
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35 |
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1352
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36 #include "error.h" |
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1742
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37 #include "pt-const.h" |
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38 #include "pt-fcn.h" |
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39 #include "pt-fvc.h" |
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1755
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40 #include "symtab.h" |
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1
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41 #include "utils.h" |
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1352
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42 #include "variables.h" |
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1
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43 |
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767
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44 // Variables and functions. |
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45 |
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1
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46 symbol_def::symbol_def (void) |
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47 { |
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195
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48 init_state (); |
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1
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49 } |
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50 |
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2390
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51 symbol_def::symbol_def (tree_constant *t) |
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1
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52 { |
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195
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53 init_state (); |
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1
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54 definition = t; |
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195
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55 type = USER_VARIABLE; |
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1
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56 } |
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57 |
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530
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58 symbol_def::symbol_def (tree_builtin *t, unsigned fcn_type) |
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1
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59 { |
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195
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60 init_state (); |
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1
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61 definition = t; |
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530
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62 type = BUILTIN_FUNCTION | fcn_type; |
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1
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63 } |
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64 |
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530
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65 symbol_def::symbol_def (tree_function *t, unsigned fcn_type) |
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1
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66 { |
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195
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67 init_state (); |
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68 definition = t; |
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530
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69 type = USER_FUNCTION | fcn_type; |
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195
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70 } |
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71 |
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72 void |
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73 symbol_def::init_state (void) |
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74 { |
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75 type = UNKNOWN; |
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76 eternal = 0; |
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77 read_only = 0; |
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78 |
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530
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79 definition = 0; |
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80 next_elem = 0; |
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195
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81 count = 0; |
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1
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82 } |
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83 |
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84 symbol_def::~symbol_def (void) |
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85 { |
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86 delete definition; |
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87 } |
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88 |
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195
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89 int |
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90 symbol_def::is_variable (void) const |
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91 { |
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530
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92 return (type & USER_VARIABLE || type & BUILTIN_VARIABLE); |
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195
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93 } |
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94 |
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95 int |
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96 symbol_def::is_function (void) const |
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97 { |
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530
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98 return (type & USER_FUNCTION || type & BUILTIN_FUNCTION); |
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195
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99 } |
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100 |
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101 int |
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102 symbol_def::is_user_variable (void) const |
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103 { |
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530
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104 return (type & USER_VARIABLE); |
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105 } |
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106 |
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107 int |
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108 symbol_def::is_text_function (void) const |
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109 { |
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110 return (type & TEXT_FUNCTION); |
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111 } |
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112 |
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113 int |
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114 symbol_def::is_mapper_function (void) const |
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115 { |
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116 return (type & MAPPER_FUNCTION); |
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195
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117 } |
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118 |
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119 int |
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120 symbol_def::is_user_function (void) const |
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121 { |
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530
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122 return (type & USER_FUNCTION); |
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195
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123 } |
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124 |
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125 int |
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126 symbol_def::is_builtin_variable (void) const |
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127 { |
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530
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128 return (type & BUILTIN_VARIABLE); |
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195
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129 } |
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130 |
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131 int |
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132 symbol_def::is_builtin_function (void) const |
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133 { |
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530
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134 return (type & BUILTIN_FUNCTION); |
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195
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135 } |
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136 |
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2390
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137 // XXX FIXME XXX |
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138 int |
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139 symbol_def::is_map_element (const string& /* elts */) const |
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140 { |
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141 return 0; |
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142 } |
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143 |
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1
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144 void |
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2390
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145 symbol_def::define (tree_constant *t) |
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1
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146 { |
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147 definition = t; |
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195
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148 if (! is_builtin_variable ()) |
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149 type = USER_VARIABLE; |
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1
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150 } |
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151 |
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152 void |
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530
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153 symbol_def::define (tree_builtin *t, unsigned fcn_type) |
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1
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154 { |
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155 definition = t; |
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530
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156 type = BUILTIN_FUNCTION | fcn_type; |
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1
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157 } |
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158 |
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159 void |
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530
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160 symbol_def::define (tree_function *t, unsigned fcn_type) |
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1
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161 { |
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162 definition = t; |
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530
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163 type = USER_FUNCTION | fcn_type; |
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195
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164 } |
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165 |
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166 void |
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167 symbol_def::protect (void) |
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168 { |
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169 read_only = 1; |
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170 } |
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171 |
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172 void |
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173 symbol_def::unprotect (void) |
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174 { |
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175 read_only = 0; |
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176 |
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177 } |
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178 |
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179 void |
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180 symbol_def::make_eternal (void) |
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181 { |
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182 eternal = 1; |
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1
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183 } |
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184 |
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489
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185 tree_fvc * |
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164
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186 symbol_def::def (void) const |
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187 { |
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188 return definition; |
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189 } |
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190 |
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1755
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191 string |
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164
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192 symbol_def::help (void) const |
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193 { |
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194 return help_string; |
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195 } |
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196 |
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197 void |
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198 symbol_def::document (const string& h) |
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199 { |
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200 help_string = h; |
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1
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201 } |
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202 |
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203 int |
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195
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204 maybe_delete (symbol_def *def) |
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205 { |
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206 int count = 0; |
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530
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207 if (def && def->count > 0) |
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195
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208 { |
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530
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209 def->count--; |
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210 count = def->count; |
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211 if (def->count == 0) |
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212 delete def; |
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195
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213 } |
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214 return count; |
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215 } |
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216 |
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767
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217 // Individual records in a symbol table. |
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218 |
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219 symbol_record::symbol_record (void) |
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220 { |
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195
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221 init_state (); |
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1
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222 } |
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223 |
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1755
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224 symbol_record::symbol_record (const string& n, symbol_record *nxt) |
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225 { |
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195
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226 init_state (); |
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227 nm = n; |
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195
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228 next_elem = nxt; |
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1
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229 } |
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230 |
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195
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231 void |
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232 symbol_record::init_state (void) |
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233 { |
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234 formal_param = 0; |
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195
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235 linked_to_global = 0; |
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530
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236 sv_fcn = 0; |
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237 definition = 0; |
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238 next_elem = 0; |
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1
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239 } |
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240 |
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241 string |
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164
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242 symbol_record::name (void) const |
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243 { |
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244 return nm; |
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245 } |
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246 |
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247 string |
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164
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248 symbol_record::help (void) const |
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249 { |
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250 string retval; |
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251 if (definition) |
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252 retval = definition->help (); |
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253 return retval; |
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254 } |
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255 |
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489
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256 tree_fvc * |
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164
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257 symbol_record::def (void) const |
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258 { |
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530
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259 return definition ? definition->def () : 0; |
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1
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260 } |
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261 |
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572
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262 void |
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1755
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263 symbol_record::rename (const string& new_name) |
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572
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264 { |
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1755
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265 nm = new_name; |
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572
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266 } |
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267 |
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1
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268 int |
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164
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269 symbol_record::is_function (void) const |
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1
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270 { |
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530
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271 return definition ? definition->is_function () : 0; |
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272 } |
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273 |
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274 int |
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275 symbol_record::is_text_function (void) const |
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276 { |
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277 return definition ? definition->is_text_function () : 0; |
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278 } |
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279 |
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280 int |
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281 symbol_record::is_mapper_function (void) const |
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282 { |
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283 return definition ? definition->is_mapper_function () : 0; |
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195
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284 } |
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285 |
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286 int |
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287 symbol_record::is_user_function (void) const |
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288 { |
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530
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289 return definition ? definition->is_user_function () : 0; |
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195
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290 } |
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291 |
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292 int |
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293 symbol_record::is_builtin_function (void) const |
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294 { |
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295 return definition ? definition->is_builtin_function () : 0; |
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1
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296 } |
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297 |
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298 int |
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164
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299 symbol_record::is_variable (void) const |
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1
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300 { |
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530
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301 return definition ? definition->is_variable () : 0; |
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195
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302 } |
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303 |
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304 int |
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305 symbol_record::is_user_variable (void) const |
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306 { |
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530
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307 return definition ? definition->is_user_variable () : 0; |
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195
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308 } |
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309 |
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310 int |
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311 symbol_record::is_builtin_variable (void) const |
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312 { |
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530
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313 return definition ? definition->is_builtin_variable () : 0; |
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195
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314 } |
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315 |
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2390
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316 int |
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317 symbol_record::is_map_element (const string& elts) const |
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318 { |
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319 return definition ? definition->is_map_element (elts) : 0; |
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320 } |
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321 |
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195
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322 unsigned |
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323 symbol_record::type (void) const |
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324 { |
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530
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325 return definition ? definition->type : 0; |
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326 } |
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327 |
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328 int |
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164
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329 symbol_record::is_defined (void) const |
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1
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330 { |
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530
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331 return definition ? (definition->def () != 0) : 0; |
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195
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332 } |
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333 |
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334 int |
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335 symbol_record::is_read_only (void) const |
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336 { |
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530
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337 return definition ? definition->read_only : 0; |
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195
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338 } |
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339 |
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340 int |
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341 symbol_record::is_eternal (void) const |
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342 { |
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530
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343 return definition ? definition->eternal : 0; |
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195
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344 } |
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345 |
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346 void |
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347 symbol_record::protect (void) |
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348 { |
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530
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349 if (definition) |
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195
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350 { |
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351 definition->protect (); |
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352 |
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353 if (! is_defined ()) |
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1755
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354 warning ("protecting undefined variable `%s'", nm.c_str ()); |
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195
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355 } |
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356 } |
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357 |
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358 void |
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359 symbol_record::unprotect (void) |
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360 { |
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530
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361 if (definition) |
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195
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362 definition->unprotect (); |
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363 } |
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364 |
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365 void |
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366 symbol_record::make_eternal (void) |
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367 { |
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530
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368 if (definition) |
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195
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369 { |
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370 definition->make_eternal (); |
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371 |
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372 if (! is_defined ()) |
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1755
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373 warning ("giving eternal life to undefined variable `%s'", |
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374 nm.c_str ()); |
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195
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375 } |
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1
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376 } |
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377 |
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378 void |
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379 symbol_record::set_sv_function (sv_Function f) |
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380 { |
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381 sv_fcn = f; |
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382 } |
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383 |
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384 int |
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2390
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385 symbol_record::define (tree_constant *t) |
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1
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386 { |
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195
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387 if (is_variable () && read_only_error ()) |
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1
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388 return 0; |
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389 |
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530
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390 tree_fvc *saved_def = 0; |
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391 if (! definition) |
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195
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392 { |
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393 definition = new symbol_def (); |
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394 definition->count = 1; |
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395 } |
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396 else if (is_function ()) |
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1
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397 { |
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195
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398 symbol_def *new_def = new symbol_def (); |
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399 push_def (new_def); |
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400 definition->count = 1; |
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1
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401 } |
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195
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402 else if (is_variable ()) |
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1
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403 { |
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195
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404 saved_def = definition->def (); |
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1
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405 } |
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406 |
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195
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407 definition->define (t); |
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408 |
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530
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409 if (sv_fcn && sv_fcn () < 0) |
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1
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410 { |
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1358
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411 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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412 |
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2390
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413 definition->define ((tree_constant *) saved_def); |
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1
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414 return 0; |
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415 } |
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416 |
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417 delete saved_def; |
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418 |
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419 return 1; |
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420 } |
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421 |
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422 int |
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2390
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423 symbol_record::define (const octave_value& v) |
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424 { |
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425 tree_constant *t = new tree_constant (v); |
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426 return define (t); |
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427 } |
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428 |
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429 int |
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530
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430 symbol_record::define (tree_builtin *t, int text_fcn) |
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1
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431 { |
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195
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432 if (read_only_error ()) |
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1
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433 return 0; |
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434 |
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195
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435 if (is_variable ()) |
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1
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436 { |
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195
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437 symbol_def *old_def = pop_def (); |
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438 maybe_delete (old_def); |
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1
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439 } |
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440 |
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195
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441 if (is_function ()) |
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1
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442 { |
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195
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443 symbol_def *old_def = pop_def (); |
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444 maybe_delete (old_def); |
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1
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445 } |
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446 |
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530
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447 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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448 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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449 : symbol_def::UNKNOWN); |
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450 |
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451 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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452 push_def (new_def); |
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453 definition->count = 1; |
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454 |
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1
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455 return 1; |
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456 } |
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457 |
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458 int |
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530
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459 symbol_record::define (tree_function *t, int text_fcn) |
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1
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460 { |
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195
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461 if (read_only_error ()) |
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1
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462 return 0; |
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463 |
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195
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464 if (is_variable ()) |
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1
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465 { |
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195
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466 symbol_def *old_def = pop_def (); |
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467 maybe_delete (old_def); |
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1
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468 } |
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469 |
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195
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470 if (is_function ()) |
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1
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471 { |
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195
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472 symbol_def *old_def = pop_def (); |
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473 maybe_delete (old_def); |
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1
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474 } |
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475 |
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530
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476 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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477 : symbol_def::UNKNOWN; |
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478 |
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479 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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480 push_def (new_def); |
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481 definition->count = 1; |
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482 |
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1
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483 return 1; |
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484 } |
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485 |
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486 int |
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2390
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487 symbol_record::define_as_fcn (const octave_value& v) |
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1
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488 { |
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195
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489 if (is_variable () && read_only_error ()) |
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1
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490 return 0; |
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491 |
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195
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492 if (is_variable ()) |
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1
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493 { |
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195
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494 symbol_def *old_def = pop_def (); |
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495 maybe_delete (old_def); |
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496 } |
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497 |
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498 if (is_function ()) |
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499 { |
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500 symbol_def *old_def = pop_def (); |
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501 maybe_delete (old_def); |
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1
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502 } |
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503 |
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2390
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504 tree_constant *t = new tree_constant (v); |
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195
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505 symbol_def *new_def = new symbol_def (t); |
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506 push_def (new_def); |
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507 definition->count = 1; |
|
|
508 definition->type = symbol_def::BUILTIN_FUNCTION; |
|
1
|
509 |
|
|
510 return 1; |
|
|
511 } |
|
|
512 |
|
195
|
513 int |
|
2390
|
514 symbol_record::define_builtin_var (const octave_value& v) |
|
195
|
515 { |
|
2390
|
516 tree_constant *t = new tree_constant (v); |
|
195
|
517 define (t); |
|
|
518 if (is_variable ()) |
|
|
519 definition->type = symbol_def::BUILTIN_VARIABLE; |
|
530
|
520 return 1; |
|
195
|
521 } |
|
|
522 |
|
1
|
523 void |
|
1755
|
524 symbol_record::document (const string& h) |
|
1
|
525 { |
|
530
|
526 if (definition) |
|
195
|
527 { |
|
|
528 definition->document (h); |
|
1
|
529 |
|
195
|
530 if (! is_defined ()) |
|
1755
|
531 warning ("documenting undefined variable `%s'", nm.c_str ()); |
|
195
|
532 } |
|
1
|
533 } |
|
|
534 |
|
|
535 int |
|
195
|
536 symbol_record::clear (void) |
|
1
|
537 { |
|
195
|
538 int count = 0; |
|
|
539 if (linked_to_global) |
|
1
|
540 { |
|
195
|
541 count = maybe_delete (definition); |
|
530
|
542 definition = 0; |
|
195
|
543 linked_to_global = 0; |
|
1
|
544 } |
|
195
|
545 else |
|
|
546 { |
|
|
547 symbol_def *old_def = pop_def (); |
|
|
548 count = maybe_delete (old_def); |
|
|
549 } |
|
|
550 return count; |
|
1
|
551 } |
|
|
552 |
|
|
553 void |
|
530
|
554 symbol_record::alias (symbol_record *s, int force) |
|
1
|
555 { |
|
195
|
556 sv_fcn = s->sv_fcn; |
|
|
557 |
|
530
|
558 if (force && ! s->definition) |
|
1
|
559 { |
|
195
|
560 s->definition = new symbol_def (); |
|
|
561 definition = s->definition; |
|
|
562 definition->count = 2; // Yes, this is correct. |
|
1
|
563 } |
|
530
|
564 else if (s->definition) |
|
1
|
565 { |
|
195
|
566 definition = s->definition; |
|
|
567 definition->count++; |
|
1
|
568 } |
|
|
569 } |
|
|
570 |
|
|
571 void |
|
|
572 symbol_record::mark_as_formal_parameter (void) |
|
|
573 { |
|
|
574 formal_param = 1; |
|
|
575 } |
|
|
576 |
|
|
577 int |
|
164
|
578 symbol_record::is_formal_parameter (void) const |
|
1
|
579 { |
|
|
580 return formal_param; |
|
|
581 } |
|
|
582 |
|
|
583 void |
|
195
|
584 symbol_record::mark_as_linked_to_global (void) |
|
122
|
585 { |
|
195
|
586 linked_to_global = 1; |
|
122
|
587 } |
|
|
588 |
|
|
589 int |
|
195
|
590 symbol_record::is_linked_to_global (void) const |
|
1
|
591 { |
|
195
|
592 return linked_to_global; |
|
1
|
593 } |
|
|
594 |
|
2390
|
595 octave_value |
|
|
596 symbol_record::variable_value (void) const |
|
|
597 { |
|
|
598 octave_value retval; |
|
|
599 |
|
|
600 if (is_variable ()) |
|
|
601 { |
|
|
602 tree_constant *tmp = (tree_constant *) def (); |
|
|
603 retval = tmp->value (); |
|
|
604 } |
|
|
605 |
|
|
606 return retval; |
|
|
607 } |
|
|
608 |
|
|
609 octave_value& |
|
|
610 symbol_record::variable_reference (void) |
|
|
611 { |
|
|
612 if (is_function ()) |
|
|
613 clear (); |
|
|
614 |
|
|
615 if (! is_defined ()) |
|
|
616 { |
|
|
617 if (! (is_formal_parameter () || is_linked_to_global ())) |
|
|
618 link_to_builtin_variable (this); |
|
|
619 |
|
|
620 if (! is_defined ()) |
|
|
621 { |
|
|
622 tree_constant *tmp = new tree_constant (); |
|
|
623 define (tmp); |
|
|
624 } |
|
|
625 } |
|
|
626 |
|
|
627 tree_constant *tmp = (tree_constant *) def (); |
|
|
628 |
|
|
629 return tmp->reference (); |
|
|
630 } |
|
|
631 |
|
1
|
632 symbol_record * |
|
164
|
633 symbol_record::next (void) const |
|
1
|
634 { |
|
|
635 return next_elem; |
|
|
636 } |
|
|
637 |
|
195
|
638 void |
|
|
639 symbol_record::chain (symbol_record *s) |
|
|
640 { |
|
|
641 next_elem = s; |
|
|
642 } |
|
|
643 |
|
220
|
644 void |
|
|
645 symbol_record::push_context (void) |
|
|
646 { |
|
|
647 context.push (definition); |
|
530
|
648 definition = 0; |
|
395
|
649 |
|
|
650 global_link_context.push ((unsigned) linked_to_global); |
|
|
651 linked_to_global = 0; |
|
220
|
652 } |
|
|
653 |
|
|
654 void |
|
|
655 symbol_record::pop_context (void) |
|
|
656 { |
|
1653
|
657 // It is possible for context to be empty if new symbols have been |
|
|
658 // inserted in the symbol table during recursive calls. This can |
|
|
659 // happen as a result of calls to eval() and feval(). |
|
220
|
660 |
|
1653
|
661 if (! context.empty ()) |
|
220
|
662 { |
|
1653
|
663 if (is_variable ()) |
|
|
664 { |
|
|
665 symbol_def *old_def = pop_def (); |
|
|
666 maybe_delete (old_def); |
|
|
667 } |
|
|
668 |
|
|
669 if (is_function ()) |
|
|
670 { |
|
|
671 symbol_def *old_def = pop_def (); |
|
|
672 maybe_delete (old_def); |
|
|
673 } |
|
|
674 |
|
|
675 definition = context.pop (); |
|
|
676 linked_to_global = global_link_context.pop (); |
|
220
|
677 } |
|
|
678 } |
|
|
679 |
|
195
|
680 int |
|
|
681 symbol_record::read_only_error (void) |
|
|
682 { |
|
|
683 if (is_read_only ()) |
|
|
684 { |
|
|
685 if (is_variable ()) |
|
1045
|
686 { |
|
2205
|
687 ::error ("can't redefine read-only constant `%s'", nm.c_str ()); |
|
1045
|
688 } |
|
195
|
689 else if (is_function ()) |
|
1045
|
690 { |
|
1755
|
691 ::error ("can't redefine read-only function `%s'", nm.c_str ()); |
|
1045
|
692 } |
|
|
693 else |
|
|
694 { |
|
1755
|
695 ::error ("can't redefine read-only symbol `%s'", nm.c_str ()); |
|
1045
|
696 } |
|
195
|
697 |
|
|
698 return 1; |
|
|
699 } |
|
|
700 else |
|
|
701 return 0; |
|
|
702 } |
|
|
703 |
|
|
704 void |
|
|
705 symbol_record::push_def (symbol_def *sd) |
|
|
706 { |
|
530
|
707 if (! sd) |
|
195
|
708 return; |
|
|
709 |
|
|
710 sd->next_elem = definition; |
|
|
711 definition = sd; |
|
|
712 } |
|
|
713 |
|
|
714 symbol_def * |
|
|
715 symbol_record::pop_def (void) |
|
|
716 { |
|
|
717 symbol_def *top = definition; |
|
530
|
718 if (definition) |
|
195
|
719 definition = definition->next_elem; |
|
|
720 return top; |
|
|
721 } |
|
|
722 |
|
767
|
723 // A structure for handling verbose information about a symbol_record. |
|
195
|
724 |
|
|
725 symbol_record_info::symbol_record_info (void) |
|
|
726 { |
|
|
727 init_state (); |
|
|
728 } |
|
|
729 |
|
|
730 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
|
731 { |
|
|
732 init_state (); |
|
|
733 |
|
|
734 type = sr.type (); |
|
|
735 |
|
|
736 if (sr.is_variable () && sr.is_defined ()) |
|
|
737 { |
|
1358
|
738 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
739 |
|
2390
|
740 tree_constant *tmp = (tree_constant *) sr.def (); |
|
620
|
741 if (tmp->is_real_scalar ()) |
|
|
742 const_type = SR_INFO_SCALAR; |
|
|
743 else if (tmp->is_complex_scalar ()) |
|
|
744 const_type = SR_INFO_COMPLEX_SCALAR; |
|
|
745 else if (tmp->is_real_matrix ()) |
|
|
746 const_type = SR_INFO_MATRIX; |
|
|
747 else if (tmp->is_complex_matrix ()) |
|
|
748 const_type = SR_INFO_COMPLEX_MATRIX; |
|
|
749 else if (tmp->is_range ()) |
|
|
750 const_type = SR_INFO_RANGE; |
|
|
751 else if (tmp->is_string ()) |
|
|
752 const_type = SR_INFO_STRING; |
|
195
|
753 |
|
|
754 nr = tmp->rows (); |
|
|
755 nc = tmp->columns (); |
|
|
756 |
|
|
757 symbol_def *sr_def = sr.definition; |
|
|
758 symbol_def *hidden_def = sr_def->next_elem; |
|
530
|
759 if (hidden_def) |
|
195
|
760 { |
|
|
761 if (hidden_def->is_user_function ()) |
|
|
762 hides = SR_INFO_USER_FUNCTION; |
|
|
763 else if (hidden_def->is_builtin_function ()) |
|
|
764 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
765 } |
|
|
766 } |
|
|
767 |
|
|
768 eternal = sr.is_eternal (); |
|
|
769 read_only = sr.is_read_only (); |
|
|
770 |
|
1755
|
771 nm = sr.name (); |
|
195
|
772 |
|
|
773 initialized = 1; |
|
|
774 } |
|
|
775 |
|
|
776 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
|
777 { |
|
|
778 type = s.type; |
|
|
779 const_type = s.const_type; |
|
|
780 hides = s.hides; |
|
|
781 eternal = s.eternal; |
|
|
782 read_only = s.read_only; |
|
|
783 nr = s.nr; |
|
|
784 nc = s.nc; |
|
1755
|
785 nm = s.nm; |
|
195
|
786 initialized = s.initialized; |
|
|
787 } |
|
|
788 |
|
|
789 symbol_record_info& |
|
|
790 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
791 { |
|
|
792 if (this != &s) |
|
|
793 { |
|
|
794 type = s.type; |
|
|
795 const_type = s.const_type; |
|
|
796 hides = s.hides; |
|
|
797 eternal = s.eternal; |
|
|
798 read_only = s.read_only; |
|
|
799 nr = s.nr; |
|
|
800 nc = s.nc; |
|
1755
|
801 nm = s.nm; |
|
195
|
802 initialized = s.initialized; |
|
|
803 } |
|
|
804 return *this; |
|
|
805 } |
|
|
806 |
|
|
807 int |
|
|
808 symbol_record_info::is_defined (void) const |
|
|
809 { |
|
|
810 return initialized; |
|
|
811 } |
|
|
812 |
|
|
813 int |
|
|
814 symbol_record_info::is_read_only (void) const |
|
|
815 { |
|
|
816 return read_only; |
|
|
817 } |
|
|
818 |
|
|
819 int |
|
|
820 symbol_record_info::is_eternal (void) const |
|
|
821 { |
|
|
822 return eternal; |
|
|
823 } |
|
|
824 |
|
|
825 int |
|
|
826 symbol_record_info::hides_fcn (void) const |
|
|
827 { |
|
|
828 return (hides & SR_INFO_USER_FUNCTION); |
|
|
829 } |
|
|
830 |
|
|
831 int |
|
|
832 symbol_record_info::hides_builtin (void) const |
|
|
833 { |
|
|
834 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
835 } |
|
|
836 |
|
1755
|
837 string |
|
2390
|
838 symbol_record_info::type_name (void) const |
|
195
|
839 { |
|
|
840 if (type == symbol_def::USER_FUNCTION) |
|
|
841 return "user function"; |
|
|
842 else if (type == symbol_def::BUILTIN_FUNCTION) |
|
|
843 return "builtin function"; |
|
|
844 else |
|
|
845 { |
|
|
846 if (const_type == SR_INFO_SCALAR) |
|
|
847 return "real scalar"; |
|
|
848 else if (const_type == SR_INFO_COMPLEX_SCALAR) |
|
|
849 return "complex scalar"; |
|
|
850 else if (const_type == SR_INFO_MATRIX) |
|
|
851 return "real matrix"; |
|
|
852 else if (const_type == SR_INFO_COMPLEX_MATRIX) |
|
|
853 return "complex matrix"; |
|
|
854 else if (const_type == SR_INFO_RANGE) |
|
|
855 return "range"; |
|
|
856 else if (const_type == SR_INFO_STRING) |
|
|
857 return "string"; |
|
|
858 else |
|
|
859 return ""; |
|
|
860 } |
|
|
861 } |
|
|
862 |
|
|
863 int |
|
|
864 symbol_record_info::is_function (void) const |
|
|
865 { |
|
|
866 return (type == symbol_def::USER_FUNCTION |
|
|
867 || type == symbol_def::BUILTIN_FUNCTION); |
|
|
868 } |
|
|
869 |
|
|
870 int |
|
|
871 symbol_record_info::rows (void) const |
|
|
872 { |
|
|
873 return nr; |
|
|
874 } |
|
|
875 |
|
|
876 int |
|
|
877 symbol_record_info::columns (void) const |
|
|
878 { |
|
|
879 return nc; |
|
|
880 } |
|
|
881 |
|
1755
|
882 string |
|
195
|
883 symbol_record_info::name (void) const |
|
|
884 { |
|
|
885 return nm; |
|
|
886 } |
|
|
887 |
|
|
888 void |
|
|
889 symbol_record_info::init_state (void) |
|
|
890 { |
|
|
891 initialized = 0; |
|
|
892 type = symbol_def::UNKNOWN; |
|
|
893 const_type = SR_INFO_UNKNOWN; |
|
|
894 hides = SR_INFO_NONE; |
|
|
895 eternal = 0; |
|
|
896 read_only = 0; |
|
|
897 nr = -1; |
|
|
898 nc = -1; |
|
|
899 } |
|
|
900 |
|
767
|
901 // A symbol table. |
|
1
|
902 |
|
|
903 symbol_table::symbol_table (void) |
|
|
904 { |
|
|
905 } |
|
|
906 |
|
|
907 symbol_record * |
|
1755
|
908 symbol_table::lookup (const string& nm, int insert, int warn) |
|
1
|
909 { |
|
|
910 int index = hash (nm) & HASH_MASK; |
|
|
911 |
|
|
912 symbol_record *ptr = table[index].next (); |
|
|
913 |
|
530
|
914 while (ptr) |
|
1
|
915 { |
|
1755
|
916 if (ptr->name () == nm) |
|
1
|
917 return ptr; |
|
|
918 ptr = ptr->next (); |
|
|
919 } |
|
|
920 |
|
|
921 if (insert) |
|
|
922 { |
|
|
923 symbol_record *new_sym; |
|
|
924 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
925 table[index].chain (new_sym); |
|
1
|
926 return new_sym; |
|
|
927 } |
|
|
928 else if (warn) |
|
1755
|
929 warning ("lookup: symbol`%s' not found", nm.c_str ()); |
|
1
|
930 |
|
530
|
931 return 0; |
|
1
|
932 } |
|
|
933 |
|
|
934 void |
|
1755
|
935 symbol_table::rename (const string& old_name, const string& new_name) |
|
572
|
936 { |
|
|
937 int index = hash (old_name) & HASH_MASK; |
|
|
938 |
|
|
939 symbol_record *prev = &table[index]; |
|
|
940 symbol_record *ptr = prev->next (); |
|
|
941 |
|
|
942 while (ptr) |
|
|
943 { |
|
1755
|
944 if (ptr->name () == old_name) |
|
572
|
945 { |
|
|
946 prev->chain (ptr->next ()); |
|
|
947 |
|
|
948 index = hash (new_name) & HASH_MASK; |
|
|
949 table[index].chain (ptr); |
|
|
950 ptr->rename (new_name); |
|
|
951 |
|
|
952 return; |
|
|
953 } |
|
|
954 |
|
|
955 prev = ptr; |
|
|
956 ptr = ptr->next (); |
|
|
957 } |
|
|
958 |
|
1755
|
959 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
960 new_name.c_str ()); |
|
572
|
961 } |
|
|
962 |
|
|
963 void |
|
530
|
964 symbol_table::clear (int clear_user_functions) |
|
1
|
965 { |
|
|
966 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
967 { |
|
169
|
968 symbol_record *ptr = table[i].next (); |
|
1
|
969 |
|
530
|
970 while (ptr) |
|
169
|
971 { |
|
195
|
972 if (ptr->is_user_variable () |
|
|
973 || (clear_user_functions && ptr->is_user_function ())) |
|
|
974 { |
|
|
975 ptr->clear (); |
|
|
976 } |
|
|
977 |
|
169
|
978 ptr = ptr->next (); |
|
1
|
979 } |
|
|
980 } |
|
|
981 } |
|
|
982 |
|
|
983 int |
|
1755
|
984 symbol_table::clear (const string& nm, int clear_user_functions) |
|
1
|
985 { |
|
|
986 int index = hash (nm) & HASH_MASK; |
|
|
987 |
|
195
|
988 symbol_record *ptr = table[index].next (); |
|
1
|
989 |
|
530
|
990 while (ptr) |
|
1
|
991 { |
|
1755
|
992 if (ptr->name () == nm |
|
195
|
993 && (ptr->is_user_variable () |
|
|
994 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
995 { |
|
195
|
996 ptr->clear (); |
|
|
997 return 1; |
|
1
|
998 } |
|
195
|
999 ptr = ptr->next (); |
|
1
|
1000 } |
|
|
1001 |
|
|
1002 return 0; |
|
|
1003 } |
|
|
1004 |
|
|
1005 int |
|
164
|
1006 symbol_table::size (void) const |
|
1
|
1007 { |
|
|
1008 int count = 0; |
|
|
1009 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1010 { |
|
|
1011 symbol_record *ptr = table[i].next (); |
|
530
|
1012 while (ptr) |
|
1
|
1013 { |
|
|
1014 count++; |
|
|
1015 ptr = ptr->next (); |
|
|
1016 } |
|
|
1017 } |
|
|
1018 return count; |
|
|
1019 } |
|
|
1020 |
|
195
|
1021 static inline int |
|
|
1022 pstrcmp (char **a, char **b) |
|
1
|
1023 { |
|
195
|
1024 return strcmp (*a, *b); |
|
1
|
1025 } |
|
|
1026 |
|
195
|
1027 static inline int |
|
|
1028 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
1029 { |
|
1755
|
1030 return (a->name () == b->name ()); |
|
1
|
1031 } |
|
|
1032 |
|
867
|
1033 static int |
|
1755
|
1034 matches_patterns (const string& name, const string_vector& pats, int npats) |
|
867
|
1035 { |
|
1755
|
1036 for (int i = 0; i < npats; i++) |
|
867
|
1037 { |
|
1792
|
1038 glob_match pattern (pats[i]); |
|
|
1039 if (pattern.match (name)) |
|
867
|
1040 return 1; |
|
|
1041 } |
|
|
1042 |
|
|
1043 return 0; |
|
|
1044 } |
|
|
1045 |
|
195
|
1046 // This function should probably share code with symbol_table::list. |
|
|
1047 // XXX FIXME XXX |
|
1
|
1048 |
|
195
|
1049 symbol_record_info * |
|
1755
|
1050 symbol_table::long_list (int& count, const string_vector& pats, |
|
|
1051 int npats, int sort, unsigned type, |
|
|
1052 unsigned scope) const |
|
1
|
1053 { |
|
115
|
1054 count = 0; |
|
1
|
1055 int n = size (); |
|
|
1056 if (n == 0) |
|
530
|
1057 return 0; |
|
1
|
1058 |
|
195
|
1059 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1060 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1061 { |
|
|
1062 symbol_record *ptr = table[i].next (); |
|
530
|
1063 while (ptr) |
|
1
|
1064 { |
|
|
1065 assert (count < n); |
|
867
|
1066 |
|
195
|
1067 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
1068 |
|
195
|
1069 unsigned my_type = ptr->type (); |
|
867
|
1070 |
|
1755
|
1071 string my_name = ptr->name (); |
|
867
|
1072 |
|
|
1073 if ((type & my_type) && (scope & my_scope) |
|
|
1074 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
|
1075 symbols[count++] = symbol_record_info (*ptr); |
|
|
1076 |
|
1
|
1077 ptr = ptr->next (); |
|
|
1078 } |
|
|
1079 } |
|
195
|
1080 symbols[count] = symbol_record_info (); |
|
|
1081 |
|
530
|
1082 if (sort && symbols) |
|
195
|
1083 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
530
|
1084 (int (*)(const void*, const void*)) symbol_record_info_cmp); |
|
195
|
1085 |
|
1
|
1086 return symbols; |
|
|
1087 } |
|
|
1088 |
|
1755
|
1089 string_vector |
|
|
1090 symbol_table::list (int& count, const string_vector& pats, int npats, |
|
|
1091 int sort, unsigned type, unsigned scope) const |
|
1
|
1092 { |
|
115
|
1093 count = 0; |
|
1
|
1094 int n = size (); |
|
|
1095 if (n == 0) |
|
530
|
1096 return 0; |
|
1
|
1097 |
|
1755
|
1098 string_vector symbols (n); |
|
|
1099 |
|
1
|
1100 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1101 { |
|
|
1102 symbol_record *ptr = table[i].next (); |
|
530
|
1103 while (ptr) |
|
1
|
1104 { |
|
|
1105 assert (count < n); |
|
605
|
1106 |
|
195
|
1107 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1108 |
|
195
|
1109 unsigned my_type = ptr->type (); |
|
605
|
1110 |
|
1755
|
1111 string my_name = ptr->name (); |
|
867
|
1112 |
|
|
1113 if ((type & my_type) && (scope & my_scope) |
|
|
1114 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
1755
|
1115 symbols[count++] = ptr->name (); |
|
605
|
1116 |
|
1
|
1117 ptr = ptr->next (); |
|
|
1118 } |
|
|
1119 } |
|
1755
|
1120 |
|
|
1121 symbols.resize (count); |
|
1
|
1122 |
|
1755
|
1123 if (sort && ! symbols.empty ()) |
|
|
1124 symbols.qsort (); |
|
1
|
1125 |
|
|
1126 return symbols; |
|
|
1127 } |
|
|
1128 |
|
605
|
1129 symbol_record ** |
|
1755
|
1130 symbol_table::glob (int& count, const string& pat, unsigned type, |
|
605
|
1131 unsigned scope) const |
|
|
1132 { |
|
|
1133 count = 0; |
|
|
1134 int n = size (); |
|
|
1135 if (n == 0) |
|
|
1136 return 0; |
|
|
1137 |
|
|
1138 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1139 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1140 { |
|
|
1141 symbol_record *ptr = table[i].next (); |
|
|
1142 while (ptr) |
|
|
1143 { |
|
|
1144 assert (count < n); |
|
|
1145 |
|
|
1146 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1147 |
|
|
1148 unsigned my_type = ptr->type (); |
|
|
1149 |
|
1792
|
1150 glob_match pattern (pat); |
|
1755
|
1151 |
|
605
|
1152 if ((type & my_type) && (scope & my_scope) |
|
1792
|
1153 && pattern.match (ptr->name ())) |
|
605
|
1154 { |
|
|
1155 symbols[count++] = ptr; |
|
|
1156 } |
|
|
1157 |
|
|
1158 ptr = ptr->next (); |
|
|
1159 } |
|
|
1160 } |
|
|
1161 symbols[count] = 0; |
|
|
1162 |
|
|
1163 return symbols; |
|
|
1164 } |
|
|
1165 |
|
220
|
1166 void |
|
|
1167 symbol_table::push_context (void) |
|
|
1168 { |
|
|
1169 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1170 { |
|
|
1171 symbol_record *ptr = table[i].next (); |
|
|
1172 |
|
530
|
1173 while (ptr) |
|
220
|
1174 { |
|
|
1175 ptr->push_context (); |
|
|
1176 ptr = ptr->next (); |
|
|
1177 } |
|
|
1178 } |
|
|
1179 } |
|
|
1180 |
|
|
1181 void |
|
|
1182 symbol_table::pop_context (void) |
|
|
1183 { |
|
|
1184 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1185 { |
|
|
1186 symbol_record *ptr = table[i].next (); |
|
|
1187 |
|
530
|
1188 while (ptr) |
|
220
|
1189 { |
|
|
1190 ptr->pop_context (); |
|
|
1191 ptr = ptr->next (); |
|
|
1192 } |
|
|
1193 } |
|
|
1194 } |
|
|
1195 |
|
1
|
1196 // Chris Torek's fave hash function. |
|
|
1197 |
|
|
1198 unsigned int |
|
1755
|
1199 symbol_table::hash (const string& str) |
|
1
|
1200 { |
|
|
1201 unsigned h = 0; |
|
1755
|
1202 for (unsigned i = 0; i < str.length (); i++) |
|
|
1203 h = h * 33 + str[i]; |
|
1
|
1204 return h; |
|
|
1205 } |
|
|
1206 |
|
1962
|
1207 // Return nonzero if S is a valid identifier. |
|
|
1208 |
|
|
1209 int |
|
|
1210 valid_identifier (const char *s) |
|
|
1211 { |
|
|
1212 if (! s || ! (isalnum (*s) || *s == '_')) |
|
|
1213 return 0; |
|
|
1214 |
|
|
1215 while (*++s != '\0') |
|
|
1216 if (! (isalnum (*s) || *s == '_')) |
|
|
1217 return 0; |
|
|
1218 |
|
|
1219 return 1; |
|
|
1220 } |
|
|
1221 |
|
1
|
1222 /* |
|
|
1223 ;;; Local Variables: *** |
|
|
1224 ;;; mode: C++ *** |
|
|
1225 ;;; End: *** |
|
|
1226 */ |
