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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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2408
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147 if (t) |
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148 t->maybe_mutate (); |
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149 |
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1
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150 definition = t; |
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2408
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151 |
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195
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152 if (! is_builtin_variable ()) |
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153 type = USER_VARIABLE; |
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1
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154 } |
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155 |
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156 void |
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530
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157 symbol_def::define (tree_builtin *t, unsigned fcn_type) |
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1
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158 { |
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159 definition = t; |
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530
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160 type = BUILTIN_FUNCTION | fcn_type; |
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1
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161 } |
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162 |
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163 void |
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530
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164 symbol_def::define (tree_function *t, unsigned fcn_type) |
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1
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165 { |
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166 definition = t; |
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530
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167 type = USER_FUNCTION | fcn_type; |
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195
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168 } |
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169 |
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170 void |
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171 symbol_def::protect (void) |
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172 { |
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173 read_only = 1; |
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174 } |
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175 |
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176 void |
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177 symbol_def::unprotect (void) |
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178 { |
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179 read_only = 0; |
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180 |
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181 } |
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182 |
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183 void |
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184 symbol_def::make_eternal (void) |
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185 { |
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186 eternal = 1; |
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1
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187 } |
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188 |
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489
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189 tree_fvc * |
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164
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190 symbol_def::def (void) const |
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1
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191 { |
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192 return definition; |
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193 } |
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194 |
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1755
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195 string |
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164
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196 symbol_def::help (void) const |
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197 { |
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198 return help_string; |
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199 } |
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200 |
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201 void |
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1755
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202 symbol_def::document (const string& h) |
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203 { |
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204 help_string = h; |
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1
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205 } |
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206 |
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207 int |
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195
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208 maybe_delete (symbol_def *def) |
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209 { |
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210 int count = 0; |
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530
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211 if (def && def->count > 0) |
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195
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212 { |
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530
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213 def->count--; |
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214 count = def->count; |
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215 if (def->count == 0) |
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216 delete def; |
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195
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217 } |
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218 return count; |
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219 } |
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220 |
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767
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221 // Individual records in a symbol table. |
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222 |
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223 symbol_record::symbol_record (void) |
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224 { |
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195
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225 init_state (); |
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1
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226 } |
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227 |
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1755
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228 symbol_record::symbol_record (const string& n, symbol_record *nxt) |
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1
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229 { |
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195
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230 init_state (); |
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1755
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231 nm = n; |
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195
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232 next_elem = nxt; |
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1
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233 } |
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234 |
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195
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235 void |
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236 symbol_record::init_state (void) |
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1
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237 { |
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238 formal_param = 0; |
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195
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239 linked_to_global = 0; |
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2846
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240 tagged_static = 0; |
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530
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241 sv_fcn = 0; |
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242 definition = 0; |
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243 next_elem = 0; |
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1
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244 } |
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245 |
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1755
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246 string |
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164
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247 symbol_record::name (void) const |
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248 { |
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249 return nm; |
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250 } |
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251 |
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1755
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252 string |
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164
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253 symbol_record::help (void) const |
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254 { |
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1755
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255 string retval; |
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256 if (definition) |
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257 retval = definition->help (); |
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258 return retval; |
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259 } |
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260 |
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489
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261 tree_fvc * |
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164
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262 symbol_record::def (void) const |
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263 { |
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530
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264 return definition ? definition->def () : 0; |
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1
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265 } |
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266 |
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572
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267 void |
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1755
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268 symbol_record::rename (const string& new_name) |
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572
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269 { |
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2791
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270 if (! read_only_error ("rename")) |
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271 nm = new_name; |
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572
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272 } |
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273 |
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1
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274 int |
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164
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275 symbol_record::is_function (void) const |
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1
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276 { |
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530
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277 return definition ? definition->is_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_text_function (void) const |
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282 { |
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283 return definition ? definition->is_text_function () : 0; |
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284 } |
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285 |
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286 int |
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287 symbol_record::is_mapper_function (void) const |
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288 { |
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289 return definition ? definition->is_mapper_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_user_function (void) const |
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294 { |
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530
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295 return definition ? definition->is_user_function () : 0; |
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195
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296 } |
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297 |
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298 int |
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299 symbol_record::is_builtin_function (void) const |
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300 { |
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530
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301 return definition ? definition->is_builtin_function () : 0; |
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1
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302 } |
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303 |
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304 int |
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164
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305 symbol_record::is_variable (void) const |
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1
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306 { |
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530
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307 return definition ? definition->is_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_user_variable (void) const |
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312 { |
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530
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313 return definition ? definition->is_user_variable () : 0; |
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195
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314 } |
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315 |
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316 int |
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317 symbol_record::is_builtin_variable (void) const |
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318 { |
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530
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319 return definition ? definition->is_builtin_variable () : 0; |
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195
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320 } |
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321 |
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2390
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322 int |
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323 symbol_record::is_map_element (const string& elts) const |
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324 { |
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325 return definition ? definition->is_map_element (elts) : 0; |
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326 } |
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327 |
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195
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328 unsigned |
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329 symbol_record::type (void) const |
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330 { |
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530
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331 return definition ? definition->type : 0; |
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1
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332 } |
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333 |
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334 int |
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164
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335 symbol_record::is_defined (void) const |
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1
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336 { |
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530
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337 return definition ? (definition->def () != 0) : 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_read_only (void) const |
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342 { |
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530
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343 return definition ? definition->read_only : 0; |
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195
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344 } |
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345 |
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346 int |
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347 symbol_record::is_eternal (void) const |
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348 { |
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530
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349 return definition ? definition->eternal : 0; |
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195
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350 } |
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351 |
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352 void |
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353 symbol_record::protect (void) |
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354 { |
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530
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355 if (definition) |
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195
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356 { |
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357 definition->protect (); |
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358 |
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359 if (! is_defined ()) |
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1755
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360 warning ("protecting undefined variable `%s'", nm.c_str ()); |
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195
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361 } |
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362 } |
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363 |
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364 void |
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365 symbol_record::unprotect (void) |
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366 { |
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530
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367 if (definition) |
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195
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368 definition->unprotect (); |
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369 } |
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370 |
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371 void |
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372 symbol_record::make_eternal (void) |
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373 { |
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530
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374 if (definition) |
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195
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375 { |
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376 definition->make_eternal (); |
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377 |
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378 if (! is_defined ()) |
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1755
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379 warning ("giving eternal life to undefined variable `%s'", |
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380 nm.c_str ()); |
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195
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381 } |
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1
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382 } |
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383 |
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384 void |
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385 symbol_record::set_sv_function (sv_Function f) |
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386 { |
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387 sv_fcn = f; |
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388 } |
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389 |
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390 int |
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2390
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391 symbol_record::define (tree_constant *t) |
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1
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392 { |
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2791
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393 if (is_variable () && read_only_error ("redefine")) |
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1
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394 return 0; |
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395 |
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530
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396 tree_fvc *saved_def = 0; |
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397 if (! definition) |
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195
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398 { |
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399 definition = new symbol_def (); |
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400 definition->count = 1; |
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401 } |
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402 else if (is_function ()) |
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1
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403 { |
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195
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404 symbol_def *new_def = new symbol_def (); |
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405 push_def (new_def); |
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406 definition->count = 1; |
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1
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407 } |
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195
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408 else if (is_variable ()) |
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1
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409 { |
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195
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410 saved_def = definition->def (); |
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1
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411 } |
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412 |
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195
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413 definition->define (t); |
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414 |
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530
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415 if (sv_fcn && sv_fcn () < 0) |
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1
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416 { |
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1358
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417 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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418 |
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2800
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419 definition->define (static_cast<tree_constant *> (saved_def)); |
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1
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420 return 0; |
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421 } |
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422 |
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423 delete saved_def; |
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424 |
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425 return 1; |
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426 } |
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427 |
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428 int |
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2390
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429 symbol_record::define (const octave_value& v) |
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430 { |
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431 tree_constant *t = new tree_constant (v); |
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432 return define (t); |
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433 } |
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434 |
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435 int |
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530
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436 symbol_record::define (tree_builtin *t, int text_fcn) |
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1
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437 { |
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2791
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438 if (read_only_error ("redefine")) |
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1
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439 return 0; |
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440 |
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195
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441 if (is_variable ()) |
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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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195
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447 if (is_function ()) |
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1
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448 { |
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195
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449 symbol_def *old_def = pop_def (); |
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450 maybe_delete (old_def); |
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1
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451 } |
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452 |
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530
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453 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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454 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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455 : symbol_def::UNKNOWN); |
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456 |
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457 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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458 push_def (new_def); |
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459 definition->count = 1; |
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460 |
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1
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461 return 1; |
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462 } |
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463 |
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464 int |
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530
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465 symbol_record::define (tree_function *t, int text_fcn) |
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1
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466 { |
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2791
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467 if (read_only_error ("redefine")) |
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1
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468 return 0; |
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469 |
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195
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470 if (is_variable ()) |
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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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195
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476 if (is_function ()) |
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1
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477 { |
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195
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478 symbol_def *old_def = pop_def (); |
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479 maybe_delete (old_def); |
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1
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480 } |
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481 |
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530
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482 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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483 : symbol_def::UNKNOWN; |
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484 |
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485 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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486 push_def (new_def); |
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487 definition->count = 1; |
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488 |
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1
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489 return 1; |
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490 } |
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491 |
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492 int |
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2390
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493 symbol_record::define_as_fcn (const octave_value& v) |
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1
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494 { |
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2791
|
495 if (is_variable () && read_only_error ("redefine")) |
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1
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496 return 0; |
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497 |
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195
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498 if (is_variable ()) |
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1
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499 { |
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195
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500 symbol_def *old_def = pop_def (); |
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501 maybe_delete (old_def); |
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502 } |
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503 |
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504 if (is_function ()) |
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505 { |
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506 symbol_def *old_def = pop_def (); |
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507 maybe_delete (old_def); |
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1
|
508 } |
|
|
509 |
|
2390
|
510 tree_constant *t = new tree_constant (v); |
|
195
|
511 symbol_def *new_def = new symbol_def (t); |
|
|
512 push_def (new_def); |
|
|
513 definition->count = 1; |
|
|
514 definition->type = symbol_def::BUILTIN_FUNCTION; |
|
1
|
515 |
|
|
516 return 1; |
|
|
517 } |
|
|
518 |
|
195
|
519 int |
|
2390
|
520 symbol_record::define_builtin_var (const octave_value& v) |
|
195
|
521 { |
|
2390
|
522 tree_constant *t = new tree_constant (v); |
|
195
|
523 define (t); |
|
|
524 if (is_variable ()) |
|
|
525 definition->type = symbol_def::BUILTIN_VARIABLE; |
|
530
|
526 return 1; |
|
195
|
527 } |
|
|
528 |
|
1
|
529 void |
|
1755
|
530 symbol_record::document (const string& h) |
|
1
|
531 { |
|
530
|
532 if (definition) |
|
195
|
533 { |
|
|
534 definition->document (h); |
|
1
|
535 |
|
195
|
536 if (! is_defined ()) |
|
1755
|
537 warning ("documenting undefined variable `%s'", nm.c_str ()); |
|
195
|
538 } |
|
1
|
539 } |
|
|
540 |
|
|
541 int |
|
195
|
542 symbol_record::clear (void) |
|
1
|
543 { |
|
195
|
544 int count = 0; |
|
|
545 if (linked_to_global) |
|
1
|
546 { |
|
195
|
547 count = maybe_delete (definition); |
|
530
|
548 definition = 0; |
|
195
|
549 linked_to_global = 0; |
|
1
|
550 } |
|
2846
|
551 else if (! tagged_static) |
|
195
|
552 { |
|
|
553 symbol_def *old_def = pop_def (); |
|
|
554 count = maybe_delete (old_def); |
|
|
555 } |
|
|
556 return count; |
|
1
|
557 } |
|
|
558 |
|
|
559 void |
|
530
|
560 symbol_record::alias (symbol_record *s, int force) |
|
1
|
561 { |
|
195
|
562 sv_fcn = s->sv_fcn; |
|
|
563 |
|
530
|
564 if (force && ! s->definition) |
|
1
|
565 { |
|
195
|
566 s->definition = new symbol_def (); |
|
|
567 definition = s->definition; |
|
|
568 definition->count = 2; // Yes, this is correct. |
|
1
|
569 } |
|
530
|
570 else if (s->definition) |
|
1
|
571 { |
|
195
|
572 definition = s->definition; |
|
|
573 definition->count++; |
|
1
|
574 } |
|
|
575 } |
|
|
576 |
|
|
577 void |
|
|
578 symbol_record::mark_as_formal_parameter (void) |
|
|
579 { |
|
|
580 formal_param = 1; |
|
|
581 } |
|
|
582 |
|
|
583 int |
|
164
|
584 symbol_record::is_formal_parameter (void) const |
|
1
|
585 { |
|
|
586 return formal_param; |
|
|
587 } |
|
|
588 |
|
|
589 void |
|
195
|
590 symbol_record::mark_as_linked_to_global (void) |
|
122
|
591 { |
|
195
|
592 linked_to_global = 1; |
|
122
|
593 } |
|
|
594 |
|
|
595 int |
|
195
|
596 symbol_record::is_linked_to_global (void) const |
|
1
|
597 { |
|
195
|
598 return linked_to_global; |
|
1
|
599 } |
|
|
600 |
|
2846
|
601 void |
|
|
602 symbol_record::mark_as_static (void) |
|
|
603 { |
|
|
604 if (is_linked_to_global ()) |
|
|
605 error ("can't make global variable static"); |
|
|
606 else if (is_formal_parameter ()) |
|
|
607 error ("can't make formal parameter static"); |
|
|
608 else |
|
|
609 tagged_static = 1; |
|
|
610 } |
|
|
611 |
|
|
612 int |
|
|
613 symbol_record::is_static (void) const |
|
|
614 { |
|
|
615 return tagged_static; |
|
|
616 } |
|
|
617 |
|
2390
|
618 octave_value |
|
|
619 symbol_record::variable_value (void) const |
|
|
620 { |
|
|
621 octave_value retval; |
|
|
622 |
|
|
623 if (is_variable ()) |
|
|
624 { |
|
2800
|
625 tree_constant *tmp = static_cast<tree_constant *> (def ()); |
|
2390
|
626 retval = tmp->value (); |
|
|
627 } |
|
|
628 |
|
|
629 return retval; |
|
|
630 } |
|
|
631 |
|
|
632 octave_value& |
|
|
633 symbol_record::variable_reference (void) |
|
|
634 { |
|
|
635 if (is_function ()) |
|
|
636 clear (); |
|
|
637 |
|
|
638 if (! is_defined ()) |
|
|
639 { |
|
|
640 if (! (is_formal_parameter () || is_linked_to_global ())) |
|
|
641 link_to_builtin_variable (this); |
|
|
642 |
|
|
643 if (! is_defined ()) |
|
|
644 { |
|
|
645 tree_constant *tmp = new tree_constant (); |
|
|
646 define (tmp); |
|
|
647 } |
|
|
648 } |
|
|
649 |
|
2800
|
650 tree_constant *tmp = static_cast<tree_constant *> (def ()); |
|
2390
|
651 |
|
|
652 return tmp->reference (); |
|
|
653 } |
|
|
654 |
|
1
|
655 symbol_record * |
|
164
|
656 symbol_record::next (void) const |
|
1
|
657 { |
|
|
658 return next_elem; |
|
|
659 } |
|
|
660 |
|
195
|
661 void |
|
|
662 symbol_record::chain (symbol_record *s) |
|
|
663 { |
|
|
664 next_elem = s; |
|
|
665 } |
|
|
666 |
|
220
|
667 void |
|
|
668 symbol_record::push_context (void) |
|
|
669 { |
|
2846
|
670 if (! is_static ()) |
|
|
671 { |
|
|
672 context.push (definition); |
|
|
673 definition = 0; |
|
395
|
674 |
|
2846
|
675 global_link_context.push (static_cast<unsigned> (linked_to_global)); |
|
|
676 linked_to_global = 0; |
|
|
677 } |
|
220
|
678 } |
|
|
679 |
|
|
680 void |
|
|
681 symbol_record::pop_context (void) |
|
|
682 { |
|
1653
|
683 // It is possible for context to be empty if new symbols have been |
|
|
684 // inserted in the symbol table during recursive calls. This can |
|
|
685 // happen as a result of calls to eval() and feval(). |
|
220
|
686 |
|
1653
|
687 if (! context.empty ()) |
|
220
|
688 { |
|
1653
|
689 if (is_variable ()) |
|
|
690 { |
|
|
691 symbol_def *old_def = pop_def (); |
|
|
692 maybe_delete (old_def); |
|
|
693 } |
|
|
694 |
|
|
695 if (is_function ()) |
|
|
696 { |
|
|
697 symbol_def *old_def = pop_def (); |
|
|
698 maybe_delete (old_def); |
|
|
699 } |
|
|
700 |
|
|
701 definition = context.pop (); |
|
|
702 linked_to_global = global_link_context.pop (); |
|
220
|
703 } |
|
|
704 } |
|
|
705 |
|
195
|
706 int |
|
2791
|
707 symbol_record::read_only_error (const char *action) |
|
195
|
708 { |
|
|
709 if (is_read_only ()) |
|
|
710 { |
|
|
711 if (is_variable ()) |
|
1045
|
712 { |
|
2791
|
713 ::error ("can't %s read-only constant `%s'", action, nm.c_str ()); |
|
1045
|
714 } |
|
195
|
715 else if (is_function ()) |
|
1045
|
716 { |
|
2791
|
717 ::error ("can't %s read-only function `%s'", action, nm.c_str ()); |
|
1045
|
718 } |
|
|
719 else |
|
|
720 { |
|
2791
|
721 ::error ("can't %s read-only symbol `%s'", action, nm.c_str ()); |
|
1045
|
722 } |
|
195
|
723 |
|
|
724 return 1; |
|
|
725 } |
|
|
726 else |
|
|
727 return 0; |
|
|
728 } |
|
|
729 |
|
|
730 void |
|
|
731 symbol_record::push_def (symbol_def *sd) |
|
|
732 { |
|
530
|
733 if (! sd) |
|
195
|
734 return; |
|
|
735 |
|
|
736 sd->next_elem = definition; |
|
|
737 definition = sd; |
|
|
738 } |
|
|
739 |
|
|
740 symbol_def * |
|
|
741 symbol_record::pop_def (void) |
|
|
742 { |
|
|
743 symbol_def *top = definition; |
|
530
|
744 if (definition) |
|
195
|
745 definition = definition->next_elem; |
|
|
746 return top; |
|
|
747 } |
|
|
748 |
|
767
|
749 // A structure for handling verbose information about a symbol_record. |
|
195
|
750 |
|
|
751 symbol_record_info::symbol_record_info (void) |
|
2404
|
752 : initialized (0), nr (-1), nc (-1), type (symbol_def::UNKNOWN), |
|
|
753 hides (SR_INFO_NONE), eternal (0), read_only (0), nm (), |
|
|
754 const_type () { } |
|
195
|
755 |
|
|
756 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
2404
|
757 : initialized (0), nr (-1), nc (-1), type (sr.type ()), |
|
|
758 hides (SR_INFO_NONE), eternal (0), read_only (0), nm (), |
|
|
759 const_type () |
|
195
|
760 { |
|
|
761 if (sr.is_variable () && sr.is_defined ()) |
|
|
762 { |
|
1358
|
763 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
764 |
|
2800
|
765 tree_constant *tmp = static_cast<tree_constant *> (sr.def ()); |
|
2404
|
766 |
|
|
767 const_type = tmp->type_name (); |
|
195
|
768 |
|
|
769 nr = tmp->rows (); |
|
|
770 nc = tmp->columns (); |
|
|
771 |
|
|
772 symbol_def *sr_def = sr.definition; |
|
|
773 symbol_def *hidden_def = sr_def->next_elem; |
|
2404
|
774 |
|
530
|
775 if (hidden_def) |
|
195
|
776 { |
|
|
777 if (hidden_def->is_user_function ()) |
|
|
778 hides = SR_INFO_USER_FUNCTION; |
|
|
779 else if (hidden_def->is_builtin_function ()) |
|
|
780 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
781 } |
|
|
782 } |
|
|
783 |
|
|
784 eternal = sr.is_eternal (); |
|
|
785 read_only = sr.is_read_only (); |
|
|
786 |
|
1755
|
787 nm = sr.name (); |
|
195
|
788 |
|
|
789 initialized = 1; |
|
|
790 } |
|
|
791 |
|
|
792 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
2404
|
793 : initialized (s.initialized), nr (s.nr), nc (s.nc), type (s.type), |
|
|
794 hides (s.hides), eternal (s.eternal), read_only (s.read_only), |
|
|
795 nm (s.nm), const_type (s.const_type) { } |
|
195
|
796 |
|
|
797 symbol_record_info& |
|
|
798 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
799 { |
|
|
800 if (this != &s) |
|
|
801 { |
|
2404
|
802 initialized = s.initialized; |
|
|
803 nr = s.nr; |
|
|
804 nc = s.nc; |
|
195
|
805 type = s.type; |
|
|
806 hides = s.hides; |
|
|
807 eternal = s.eternal; |
|
|
808 read_only = s.read_only; |
|
1755
|
809 nm = s.nm; |
|
2404
|
810 const_type = s.const_type; |
|
195
|
811 } |
|
|
812 return *this; |
|
|
813 } |
|
|
814 |
|
|
815 int |
|
|
816 symbol_record_info::is_defined (void) const |
|
|
817 { |
|
|
818 return initialized; |
|
|
819 } |
|
|
820 |
|
|
821 int |
|
|
822 symbol_record_info::is_read_only (void) const |
|
|
823 { |
|
|
824 return read_only; |
|
|
825 } |
|
|
826 |
|
|
827 int |
|
|
828 symbol_record_info::is_eternal (void) const |
|
|
829 { |
|
|
830 return eternal; |
|
|
831 } |
|
|
832 |
|
|
833 int |
|
|
834 symbol_record_info::hides_fcn (void) const |
|
|
835 { |
|
|
836 return (hides & SR_INFO_USER_FUNCTION); |
|
|
837 } |
|
|
838 |
|
|
839 int |
|
|
840 symbol_record_info::hides_builtin (void) const |
|
|
841 { |
|
|
842 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
843 } |
|
|
844 |
|
1755
|
845 string |
|
2390
|
846 symbol_record_info::type_name (void) const |
|
195
|
847 { |
|
2404
|
848 string retval; |
|
|
849 |
|
195
|
850 if (type == symbol_def::USER_FUNCTION) |
|
2404
|
851 retval = "user function"; |
|
|
852 else if (type & symbol_def::BUILTIN_FUNCTION) |
|
195
|
853 { |
|
2404
|
854 if (type & symbol_def::TEXT_FUNCTION) |
|
|
855 retval = "text function"; |
|
|
856 else if (type & symbol_def::MAPPER_FUNCTION) |
|
|
857 retval = "mapper function"; |
|
195
|
858 else |
|
2404
|
859 retval = "builtin function"; |
|
195
|
860 } |
|
2404
|
861 else |
|
|
862 retval = const_type; |
|
|
863 |
|
|
864 return retval; |
|
195
|
865 } |
|
|
866 |
|
|
867 int |
|
|
868 symbol_record_info::is_function (void) const |
|
|
869 { |
|
|
870 return (type == symbol_def::USER_FUNCTION |
|
2404
|
871 || type == symbol_def::BUILTIN_FUNCTION |
|
|
872 || symbol_def::TEXT_FUNCTION |
|
|
873 || symbol_def::MAPPER_FUNCTION); |
|
195
|
874 } |
|
|
875 |
|
|
876 int |
|
|
877 symbol_record_info::rows (void) const |
|
|
878 { |
|
|
879 return nr; |
|
|
880 } |
|
|
881 |
|
|
882 int |
|
|
883 symbol_record_info::columns (void) const |
|
|
884 { |
|
|
885 return nc; |
|
|
886 } |
|
|
887 |
|
1755
|
888 string |
|
195
|
889 symbol_record_info::name (void) const |
|
|
890 { |
|
|
891 return nm; |
|
|
892 } |
|
|
893 |
|
767
|
894 // A symbol table. |
|
1
|
895 |
|
|
896 symbol_table::symbol_table (void) |
|
|
897 { |
|
|
898 } |
|
|
899 |
|
|
900 symbol_record * |
|
1755
|
901 symbol_table::lookup (const string& nm, int insert, int warn) |
|
1
|
902 { |
|
|
903 int index = hash (nm) & HASH_MASK; |
|
|
904 |
|
|
905 symbol_record *ptr = table[index].next (); |
|
|
906 |
|
530
|
907 while (ptr) |
|
1
|
908 { |
|
1755
|
909 if (ptr->name () == nm) |
|
1
|
910 return ptr; |
|
|
911 ptr = ptr->next (); |
|
|
912 } |
|
|
913 |
|
|
914 if (insert) |
|
|
915 { |
|
|
916 symbol_record *new_sym; |
|
|
917 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
918 table[index].chain (new_sym); |
|
1
|
919 return new_sym; |
|
|
920 } |
|
|
921 else if (warn) |
|
1755
|
922 warning ("lookup: symbol`%s' not found", nm.c_str ()); |
|
1
|
923 |
|
530
|
924 return 0; |
|
1
|
925 } |
|
|
926 |
|
|
927 void |
|
1755
|
928 symbol_table::rename (const string& old_name, const string& new_name) |
|
572
|
929 { |
|
|
930 int index = hash (old_name) & HASH_MASK; |
|
|
931 |
|
|
932 symbol_record *prev = &table[index]; |
|
|
933 symbol_record *ptr = prev->next (); |
|
|
934 |
|
|
935 while (ptr) |
|
|
936 { |
|
1755
|
937 if (ptr->name () == old_name) |
|
572
|
938 { |
|
|
939 ptr->rename (new_name); |
|
|
940 |
|
2791
|
941 if (! error_state) |
|
|
942 { |
|
|
943 prev->chain (ptr->next ()); |
|
|
944 |
|
|
945 index = hash (new_name) & HASH_MASK; |
|
|
946 table[index].chain (ptr); |
|
|
947 |
|
|
948 return; |
|
|
949 } |
|
|
950 |
|
|
951 break; |
|
572
|
952 } |
|
|
953 |
|
|
954 prev = ptr; |
|
|
955 ptr = ptr->next (); |
|
|
956 } |
|
|
957 |
|
1755
|
958 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
959 new_name.c_str ()); |
|
572
|
960 } |
|
|
961 |
|
|
962 void |
|
530
|
963 symbol_table::clear (int clear_user_functions) |
|
1
|
964 { |
|
|
965 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
966 { |
|
169
|
967 symbol_record *ptr = table[i].next (); |
|
1
|
968 |
|
530
|
969 while (ptr) |
|
169
|
970 { |
|
195
|
971 if (ptr->is_user_variable () |
|
|
972 || (clear_user_functions && ptr->is_user_function ())) |
|
|
973 { |
|
|
974 ptr->clear (); |
|
|
975 } |
|
|
976 |
|
169
|
977 ptr = ptr->next (); |
|
1
|
978 } |
|
|
979 } |
|
|
980 } |
|
|
981 |
|
|
982 int |
|
1755
|
983 symbol_table::clear (const string& nm, int clear_user_functions) |
|
1
|
984 { |
|
|
985 int index = hash (nm) & HASH_MASK; |
|
|
986 |
|
195
|
987 symbol_record *ptr = table[index].next (); |
|
1
|
988 |
|
530
|
989 while (ptr) |
|
1
|
990 { |
|
1755
|
991 if (ptr->name () == nm |
|
195
|
992 && (ptr->is_user_variable () |
|
|
993 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
994 { |
|
195
|
995 ptr->clear (); |
|
|
996 return 1; |
|
1
|
997 } |
|
195
|
998 ptr = ptr->next (); |
|
1
|
999 } |
|
|
1000 |
|
|
1001 return 0; |
|
|
1002 } |
|
|
1003 |
|
|
1004 int |
|
164
|
1005 symbol_table::size (void) const |
|
1
|
1006 { |
|
|
1007 int count = 0; |
|
|
1008 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1009 { |
|
|
1010 symbol_record *ptr = table[i].next (); |
|
530
|
1011 while (ptr) |
|
1
|
1012 { |
|
|
1013 count++; |
|
|
1014 ptr = ptr->next (); |
|
|
1015 } |
|
|
1016 } |
|
|
1017 return count; |
|
|
1018 } |
|
|
1019 |
|
195
|
1020 static inline int |
|
|
1021 pstrcmp (char **a, char **b) |
|
1
|
1022 { |
|
195
|
1023 return strcmp (*a, *b); |
|
1
|
1024 } |
|
|
1025 |
|
195
|
1026 static inline int |
|
|
1027 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
1028 { |
|
1755
|
1029 return (a->name () == b->name ()); |
|
1
|
1030 } |
|
|
1031 |
|
867
|
1032 static int |
|
1755
|
1033 matches_patterns (const string& name, const string_vector& pats, int npats) |
|
867
|
1034 { |
|
1755
|
1035 for (int i = 0; i < npats; i++) |
|
867
|
1036 { |
|
1792
|
1037 glob_match pattern (pats[i]); |
|
|
1038 if (pattern.match (name)) |
|
867
|
1039 return 1; |
|
|
1040 } |
|
|
1041 |
|
|
1042 return 0; |
|
|
1043 } |
|
|
1044 |
|
195
|
1045 // This function should probably share code with symbol_table::list. |
|
|
1046 // XXX FIXME XXX |
|
1
|
1047 |
|
195
|
1048 symbol_record_info * |
|
1755
|
1049 symbol_table::long_list (int& count, const string_vector& pats, |
|
|
1050 int npats, int sort, unsigned type, |
|
|
1051 unsigned scope) const |
|
1
|
1052 { |
|
115
|
1053 count = 0; |
|
1
|
1054 int n = size (); |
|
|
1055 if (n == 0) |
|
530
|
1056 return 0; |
|
1
|
1057 |
|
195
|
1058 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1059 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1060 { |
|
|
1061 symbol_record *ptr = table[i].next (); |
|
530
|
1062 while (ptr) |
|
1
|
1063 { |
|
|
1064 assert (count < n); |
|
867
|
1065 |
|
195
|
1066 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
1067 |
|
195
|
1068 unsigned my_type = ptr->type (); |
|
867
|
1069 |
|
1755
|
1070 string my_name = ptr->name (); |
|
867
|
1071 |
|
|
1072 if ((type & my_type) && (scope & my_scope) |
|
|
1073 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
|
1074 symbols[count++] = symbol_record_info (*ptr); |
|
|
1075 |
|
1
|
1076 ptr = ptr->next (); |
|
|
1077 } |
|
|
1078 } |
|
195
|
1079 symbols[count] = symbol_record_info (); |
|
|
1080 |
|
530
|
1081 if (sort && symbols) |
|
2800
|
1082 qsort (symbols, count, sizeof (symbol_record_info), |
|
|
1083 symbol_record_info_cmp); |
|
195
|
1084 |
|
1
|
1085 return symbols; |
|
|
1086 } |
|
|
1087 |
|
1755
|
1088 string_vector |
|
|
1089 symbol_table::list (int& count, const string_vector& pats, int npats, |
|
|
1090 int sort, unsigned type, unsigned scope) const |
|
1
|
1091 { |
|
115
|
1092 count = 0; |
|
1
|
1093 int n = size (); |
|
|
1094 if (n == 0) |
|
530
|
1095 return 0; |
|
1
|
1096 |
|
1755
|
1097 string_vector symbols (n); |
|
|
1098 |
|
1
|
1099 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1100 { |
|
|
1101 symbol_record *ptr = table[i].next (); |
|
530
|
1102 while (ptr) |
|
1
|
1103 { |
|
|
1104 assert (count < n); |
|
605
|
1105 |
|
195
|
1106 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1107 |
|
195
|
1108 unsigned my_type = ptr->type (); |
|
605
|
1109 |
|
1755
|
1110 string my_name = ptr->name (); |
|
867
|
1111 |
|
|
1112 if ((type & my_type) && (scope & my_scope) |
|
|
1113 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
1755
|
1114 symbols[count++] = ptr->name (); |
|
605
|
1115 |
|
1
|
1116 ptr = ptr->next (); |
|
|
1117 } |
|
|
1118 } |
|
1755
|
1119 |
|
|
1120 symbols.resize (count); |
|
1
|
1121 |
|
1755
|
1122 if (sort && ! symbols.empty ()) |
|
|
1123 symbols.qsort (); |
|
1
|
1124 |
|
|
1125 return symbols; |
|
|
1126 } |
|
|
1127 |
|
605
|
1128 symbol_record ** |
|
1755
|
1129 symbol_table::glob (int& count, const string& pat, unsigned type, |
|
605
|
1130 unsigned scope) const |
|
|
1131 { |
|
|
1132 count = 0; |
|
|
1133 int n = size (); |
|
|
1134 if (n == 0) |
|
|
1135 return 0; |
|
|
1136 |
|
|
1137 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1138 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1139 { |
|
|
1140 symbol_record *ptr = table[i].next (); |
|
|
1141 while (ptr) |
|
|
1142 { |
|
|
1143 assert (count < n); |
|
|
1144 |
|
|
1145 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1146 |
|
|
1147 unsigned my_type = ptr->type (); |
|
|
1148 |
|
1792
|
1149 glob_match pattern (pat); |
|
1755
|
1150 |
|
605
|
1151 if ((type & my_type) && (scope & my_scope) |
|
1792
|
1152 && pattern.match (ptr->name ())) |
|
605
|
1153 { |
|
|
1154 symbols[count++] = ptr; |
|
|
1155 } |
|
|
1156 |
|
|
1157 ptr = ptr->next (); |
|
|
1158 } |
|
|
1159 } |
|
|
1160 symbols[count] = 0; |
|
|
1161 |
|
|
1162 return symbols; |
|
|
1163 } |
|
|
1164 |
|
220
|
1165 void |
|
|
1166 symbol_table::push_context (void) |
|
|
1167 { |
|
|
1168 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1169 { |
|
|
1170 symbol_record *ptr = table[i].next (); |
|
|
1171 |
|
530
|
1172 while (ptr) |
|
220
|
1173 { |
|
|
1174 ptr->push_context (); |
|
|
1175 ptr = ptr->next (); |
|
|
1176 } |
|
|
1177 } |
|
|
1178 } |
|
|
1179 |
|
|
1180 void |
|
|
1181 symbol_table::pop_context (void) |
|
|
1182 { |
|
|
1183 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1184 { |
|
|
1185 symbol_record *ptr = table[i].next (); |
|
|
1186 |
|
530
|
1187 while (ptr) |
|
220
|
1188 { |
|
|
1189 ptr->pop_context (); |
|
|
1190 ptr = ptr->next (); |
|
|
1191 } |
|
|
1192 } |
|
|
1193 } |
|
|
1194 |
|
1
|
1195 // Chris Torek's fave hash function. |
|
|
1196 |
|
|
1197 unsigned int |
|
1755
|
1198 symbol_table::hash (const string& str) |
|
1
|
1199 { |
|
|
1200 unsigned h = 0; |
|
1755
|
1201 for (unsigned i = 0; i < str.length (); i++) |
|
|
1202 h = h * 33 + str[i]; |
|
1
|
1203 return h; |
|
|
1204 } |
|
|
1205 |
|
1962
|
1206 // Return nonzero if S is a valid identifier. |
|
|
1207 |
|
|
1208 int |
|
|
1209 valid_identifier (const char *s) |
|
|
1210 { |
|
|
1211 if (! s || ! (isalnum (*s) || *s == '_')) |
|
|
1212 return 0; |
|
|
1213 |
|
|
1214 while (*++s != '\0') |
|
|
1215 if (! (isalnum (*s) || *s == '_')) |
|
|
1216 return 0; |
|
|
1217 |
|
|
1218 return 1; |
|
|
1219 } |
|
|
1220 |
|
2790
|
1221 int |
|
|
1222 valid_identifier (const string& s) |
|
|
1223 { |
|
|
1224 return valid_identifier (s.c_str ()); |
|
|
1225 } |
|
|
1226 |
|
1
|
1227 /* |
|
|
1228 ;;; Local Variables: *** |
|
|
1229 ;;; mode: C++ *** |
|
|
1230 ;;; End: *** |
|
|
1231 */ |
