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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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1
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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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1
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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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530
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240 sv_fcn = 0; |
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241 definition = 0; |
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242 next_elem = 0; |
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1
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243 } |
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244 |
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1755
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245 string |
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164
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246 symbol_record::name (void) const |
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1
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247 { |
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248 return nm; |
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249 } |
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250 |
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1755
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251 string |
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164
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252 symbol_record::help (void) const |
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253 { |
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1755
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254 string retval; |
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255 if (definition) |
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256 retval = definition->help (); |
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257 return retval; |
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1
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258 } |
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259 |
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489
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260 tree_fvc * |
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164
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261 symbol_record::def (void) const |
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1
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262 { |
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530
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263 return definition ? definition->def () : 0; |
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1
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264 } |
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265 |
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572
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266 void |
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1755
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267 symbol_record::rename (const string& new_name) |
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572
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268 { |
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1755
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269 nm = new_name; |
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572
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270 } |
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271 |
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1
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272 int |
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164
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273 symbol_record::is_function (void) const |
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1
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274 { |
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530
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275 return definition ? definition->is_function () : 0; |
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276 } |
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277 |
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278 int |
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279 symbol_record::is_text_function (void) const |
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280 { |
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281 return definition ? definition->is_text_function () : 0; |
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282 } |
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283 |
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284 int |
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285 symbol_record::is_mapper_function (void) const |
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286 { |
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287 return definition ? definition->is_mapper_function () : 0; |
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195
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288 } |
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289 |
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290 int |
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291 symbol_record::is_user_function (void) const |
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292 { |
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530
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293 return definition ? definition->is_user_function () : 0; |
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195
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294 } |
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295 |
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296 int |
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297 symbol_record::is_builtin_function (void) const |
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298 { |
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530
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299 return definition ? definition->is_builtin_function () : 0; |
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1
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300 } |
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301 |
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302 int |
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164
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303 symbol_record::is_variable (void) const |
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1
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304 { |
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530
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305 return definition ? definition->is_variable () : 0; |
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195
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306 } |
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307 |
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308 int |
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309 symbol_record::is_user_variable (void) const |
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310 { |
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530
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311 return definition ? definition->is_user_variable () : 0; |
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195
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312 } |
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313 |
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314 int |
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315 symbol_record::is_builtin_variable (void) const |
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316 { |
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530
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317 return definition ? definition->is_builtin_variable () : 0; |
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195
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318 } |
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319 |
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2390
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320 int |
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321 symbol_record::is_map_element (const string& elts) const |
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322 { |
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323 return definition ? definition->is_map_element (elts) : 0; |
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324 } |
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325 |
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195
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326 unsigned |
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327 symbol_record::type (void) const |
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328 { |
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530
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329 return definition ? definition->type : 0; |
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1
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330 } |
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331 |
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332 int |
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164
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333 symbol_record::is_defined (void) const |
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1
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334 { |
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530
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335 return definition ? (definition->def () != 0) : 0; |
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195
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336 } |
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337 |
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338 int |
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339 symbol_record::is_read_only (void) const |
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340 { |
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530
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341 return definition ? definition->read_only : 0; |
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195
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342 } |
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343 |
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344 int |
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345 symbol_record::is_eternal (void) const |
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346 { |
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530
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347 return definition ? definition->eternal : 0; |
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195
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348 } |
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349 |
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350 void |
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351 symbol_record::protect (void) |
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352 { |
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530
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353 if (definition) |
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195
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354 { |
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355 definition->protect (); |
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356 |
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357 if (! is_defined ()) |
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1755
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358 warning ("protecting undefined variable `%s'", nm.c_str ()); |
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195
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359 } |
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360 } |
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361 |
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362 void |
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363 symbol_record::unprotect (void) |
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364 { |
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530
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365 if (definition) |
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195
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366 definition->unprotect (); |
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367 } |
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368 |
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369 void |
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370 symbol_record::make_eternal (void) |
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371 { |
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530
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372 if (definition) |
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195
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373 { |
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374 definition->make_eternal (); |
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375 |
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376 if (! is_defined ()) |
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1755
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377 warning ("giving eternal life to undefined variable `%s'", |
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378 nm.c_str ()); |
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195
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379 } |
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1
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380 } |
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381 |
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382 void |
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383 symbol_record::set_sv_function (sv_Function f) |
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384 { |
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385 sv_fcn = f; |
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386 } |
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387 |
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388 int |
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2390
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389 symbol_record::define (tree_constant *t) |
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1
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390 { |
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195
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391 if (is_variable () && read_only_error ()) |
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1
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392 return 0; |
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393 |
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530
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394 tree_fvc *saved_def = 0; |
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395 if (! definition) |
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195
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396 { |
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397 definition = new symbol_def (); |
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398 definition->count = 1; |
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399 } |
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400 else if (is_function ()) |
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1
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401 { |
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195
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402 symbol_def *new_def = new symbol_def (); |
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403 push_def (new_def); |
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404 definition->count = 1; |
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1
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405 } |
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195
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406 else if (is_variable ()) |
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1
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407 { |
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195
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408 saved_def = definition->def (); |
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1
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409 } |
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410 |
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195
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411 definition->define (t); |
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412 |
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530
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413 if (sv_fcn && sv_fcn () < 0) |
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1
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414 { |
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1358
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415 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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416 |
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2390
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417 definition->define ((tree_constant *) saved_def); |
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1
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418 return 0; |
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419 } |
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420 |
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421 delete saved_def; |
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422 |
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423 return 1; |
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424 } |
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425 |
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426 int |
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2390
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427 symbol_record::define (const octave_value& v) |
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428 { |
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429 tree_constant *t = new tree_constant (v); |
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430 return define (t); |
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431 } |
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432 |
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433 int |
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530
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434 symbol_record::define (tree_builtin *t, int text_fcn) |
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1
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435 { |
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195
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436 if (read_only_error ()) |
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1
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437 return 0; |
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438 |
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195
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439 if (is_variable ()) |
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1
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440 { |
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195
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441 symbol_def *old_def = pop_def (); |
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442 maybe_delete (old_def); |
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1
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443 } |
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444 |
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195
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445 if (is_function ()) |
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1
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446 { |
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195
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447 symbol_def *old_def = pop_def (); |
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448 maybe_delete (old_def); |
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1
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449 } |
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450 |
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530
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451 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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452 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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453 : symbol_def::UNKNOWN); |
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454 |
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455 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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456 push_def (new_def); |
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457 definition->count = 1; |
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458 |
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1
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459 return 1; |
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460 } |
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461 |
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462 int |
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530
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463 symbol_record::define (tree_function *t, int text_fcn) |
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1
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464 { |
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195
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465 if (read_only_error ()) |
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1
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466 return 0; |
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467 |
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195
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468 if (is_variable ()) |
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1
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469 { |
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195
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470 symbol_def *old_def = pop_def (); |
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471 maybe_delete (old_def); |
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1
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472 } |
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473 |
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195
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474 if (is_function ()) |
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1
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475 { |
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195
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476 symbol_def *old_def = pop_def (); |
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477 maybe_delete (old_def); |
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1
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478 } |
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479 |
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530
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480 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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481 : symbol_def::UNKNOWN; |
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482 |
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483 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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484 push_def (new_def); |
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485 definition->count = 1; |
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486 |
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1
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487 return 1; |
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488 } |
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489 |
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490 int |
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2390
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491 symbol_record::define_as_fcn (const octave_value& v) |
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1
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492 { |
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195
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493 if (is_variable () && read_only_error ()) |
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1
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494 return 0; |
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495 |
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195
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496 if (is_variable ()) |
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1
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497 { |
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195
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498 symbol_def *old_def = pop_def (); |
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499 maybe_delete (old_def); |
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500 } |
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501 |
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502 if (is_function ()) |
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503 { |
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504 symbol_def *old_def = pop_def (); |
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505 maybe_delete (old_def); |
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1
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506 } |
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507 |
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2390
|
508 tree_constant *t = new tree_constant (v); |
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195
|
509 symbol_def *new_def = new symbol_def (t); |
|
|
510 push_def (new_def); |
|
|
511 definition->count = 1; |
|
|
512 definition->type = symbol_def::BUILTIN_FUNCTION; |
|
1
|
513 |
|
|
514 return 1; |
|
|
515 } |
|
|
516 |
|
195
|
517 int |
|
2390
|
518 symbol_record::define_builtin_var (const octave_value& v) |
|
195
|
519 { |
|
2390
|
520 tree_constant *t = new tree_constant (v); |
|
195
|
521 define (t); |
|
|
522 if (is_variable ()) |
|
|
523 definition->type = symbol_def::BUILTIN_VARIABLE; |
|
530
|
524 return 1; |
|
195
|
525 } |
|
|
526 |
|
1
|
527 void |
|
1755
|
528 symbol_record::document (const string& h) |
|
1
|
529 { |
|
530
|
530 if (definition) |
|
195
|
531 { |
|
|
532 definition->document (h); |
|
1
|
533 |
|
195
|
534 if (! is_defined ()) |
|
1755
|
535 warning ("documenting undefined variable `%s'", nm.c_str ()); |
|
195
|
536 } |
|
1
|
537 } |
|
|
538 |
|
|
539 int |
|
195
|
540 symbol_record::clear (void) |
|
1
|
541 { |
|
195
|
542 int count = 0; |
|
|
543 if (linked_to_global) |
|
1
|
544 { |
|
195
|
545 count = maybe_delete (definition); |
|
530
|
546 definition = 0; |
|
195
|
547 linked_to_global = 0; |
|
1
|
548 } |
|
195
|
549 else |
|
|
550 { |
|
|
551 symbol_def *old_def = pop_def (); |
|
|
552 count = maybe_delete (old_def); |
|
|
553 } |
|
|
554 return count; |
|
1
|
555 } |
|
|
556 |
|
|
557 void |
|
530
|
558 symbol_record::alias (symbol_record *s, int force) |
|
1
|
559 { |
|
195
|
560 sv_fcn = s->sv_fcn; |
|
|
561 |
|
530
|
562 if (force && ! s->definition) |
|
1
|
563 { |
|
195
|
564 s->definition = new symbol_def (); |
|
|
565 definition = s->definition; |
|
|
566 definition->count = 2; // Yes, this is correct. |
|
1
|
567 } |
|
530
|
568 else if (s->definition) |
|
1
|
569 { |
|
195
|
570 definition = s->definition; |
|
|
571 definition->count++; |
|
1
|
572 } |
|
|
573 } |
|
|
574 |
|
|
575 void |
|
|
576 symbol_record::mark_as_formal_parameter (void) |
|
|
577 { |
|
|
578 formal_param = 1; |
|
|
579 } |
|
|
580 |
|
|
581 int |
|
164
|
582 symbol_record::is_formal_parameter (void) const |
|
1
|
583 { |
|
|
584 return formal_param; |
|
|
585 } |
|
|
586 |
|
|
587 void |
|
195
|
588 symbol_record::mark_as_linked_to_global (void) |
|
122
|
589 { |
|
195
|
590 linked_to_global = 1; |
|
122
|
591 } |
|
|
592 |
|
|
593 int |
|
195
|
594 symbol_record::is_linked_to_global (void) const |
|
1
|
595 { |
|
195
|
596 return linked_to_global; |
|
1
|
597 } |
|
|
598 |
|
2390
|
599 octave_value |
|
|
600 symbol_record::variable_value (void) const |
|
|
601 { |
|
|
602 octave_value retval; |
|
|
603 |
|
|
604 if (is_variable ()) |
|
|
605 { |
|
|
606 tree_constant *tmp = (tree_constant *) def (); |
|
|
607 retval = tmp->value (); |
|
|
608 } |
|
|
609 |
|
|
610 return retval; |
|
|
611 } |
|
|
612 |
|
|
613 octave_value& |
|
|
614 symbol_record::variable_reference (void) |
|
|
615 { |
|
|
616 if (is_function ()) |
|
|
617 clear (); |
|
|
618 |
|
|
619 if (! is_defined ()) |
|
|
620 { |
|
|
621 if (! (is_formal_parameter () || is_linked_to_global ())) |
|
|
622 link_to_builtin_variable (this); |
|
|
623 |
|
|
624 if (! is_defined ()) |
|
|
625 { |
|
|
626 tree_constant *tmp = new tree_constant (); |
|
|
627 define (tmp); |
|
|
628 } |
|
|
629 } |
|
|
630 |
|
|
631 tree_constant *tmp = (tree_constant *) def (); |
|
|
632 |
|
|
633 return tmp->reference (); |
|
|
634 } |
|
|
635 |
|
1
|
636 symbol_record * |
|
164
|
637 symbol_record::next (void) const |
|
1
|
638 { |
|
|
639 return next_elem; |
|
|
640 } |
|
|
641 |
|
195
|
642 void |
|
|
643 symbol_record::chain (symbol_record *s) |
|
|
644 { |
|
|
645 next_elem = s; |
|
|
646 } |
|
|
647 |
|
220
|
648 void |
|
|
649 symbol_record::push_context (void) |
|
|
650 { |
|
|
651 context.push (definition); |
|
530
|
652 definition = 0; |
|
395
|
653 |
|
|
654 global_link_context.push ((unsigned) linked_to_global); |
|
|
655 linked_to_global = 0; |
|
220
|
656 } |
|
|
657 |
|
|
658 void |
|
|
659 symbol_record::pop_context (void) |
|
|
660 { |
|
1653
|
661 // It is possible for context to be empty if new symbols have been |
|
|
662 // inserted in the symbol table during recursive calls. This can |
|
|
663 // happen as a result of calls to eval() and feval(). |
|
220
|
664 |
|
1653
|
665 if (! context.empty ()) |
|
220
|
666 { |
|
1653
|
667 if (is_variable ()) |
|
|
668 { |
|
|
669 symbol_def *old_def = pop_def (); |
|
|
670 maybe_delete (old_def); |
|
|
671 } |
|
|
672 |
|
|
673 if (is_function ()) |
|
|
674 { |
|
|
675 symbol_def *old_def = pop_def (); |
|
|
676 maybe_delete (old_def); |
|
|
677 } |
|
|
678 |
|
|
679 definition = context.pop (); |
|
|
680 linked_to_global = global_link_context.pop (); |
|
220
|
681 } |
|
|
682 } |
|
|
683 |
|
195
|
684 int |
|
|
685 symbol_record::read_only_error (void) |
|
|
686 { |
|
|
687 if (is_read_only ()) |
|
|
688 { |
|
|
689 if (is_variable ()) |
|
1045
|
690 { |
|
2205
|
691 ::error ("can't redefine read-only constant `%s'", nm.c_str ()); |
|
1045
|
692 } |
|
195
|
693 else if (is_function ()) |
|
1045
|
694 { |
|
1755
|
695 ::error ("can't redefine read-only function `%s'", nm.c_str ()); |
|
1045
|
696 } |
|
|
697 else |
|
|
698 { |
|
1755
|
699 ::error ("can't redefine read-only symbol `%s'", nm.c_str ()); |
|
1045
|
700 } |
|
195
|
701 |
|
|
702 return 1; |
|
|
703 } |
|
|
704 else |
|
|
705 return 0; |
|
|
706 } |
|
|
707 |
|
|
708 void |
|
|
709 symbol_record::push_def (symbol_def *sd) |
|
|
710 { |
|
530
|
711 if (! sd) |
|
195
|
712 return; |
|
|
713 |
|
|
714 sd->next_elem = definition; |
|
|
715 definition = sd; |
|
|
716 } |
|
|
717 |
|
|
718 symbol_def * |
|
|
719 symbol_record::pop_def (void) |
|
|
720 { |
|
|
721 symbol_def *top = definition; |
|
530
|
722 if (definition) |
|
195
|
723 definition = definition->next_elem; |
|
|
724 return top; |
|
|
725 } |
|
|
726 |
|
767
|
727 // A structure for handling verbose information about a symbol_record. |
|
195
|
728 |
|
|
729 symbol_record_info::symbol_record_info (void) |
|
2404
|
730 : initialized (0), nr (-1), nc (-1), type (symbol_def::UNKNOWN), |
|
|
731 hides (SR_INFO_NONE), eternal (0), read_only (0), nm (), |
|
|
732 const_type () { } |
|
195
|
733 |
|
|
734 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
2404
|
735 : initialized (0), nr (-1), nc (-1), type (sr.type ()), |
|
|
736 hides (SR_INFO_NONE), eternal (0), read_only (0), nm (), |
|
|
737 const_type () |
|
195
|
738 { |
|
|
739 if (sr.is_variable () && sr.is_defined ()) |
|
|
740 { |
|
1358
|
741 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
742 |
|
2390
|
743 tree_constant *tmp = (tree_constant *) sr.def (); |
|
2404
|
744 |
|
|
745 const_type = tmp->type_name (); |
|
195
|
746 |
|
|
747 nr = tmp->rows (); |
|
|
748 nc = tmp->columns (); |
|
|
749 |
|
|
750 symbol_def *sr_def = sr.definition; |
|
|
751 symbol_def *hidden_def = sr_def->next_elem; |
|
2404
|
752 |
|
530
|
753 if (hidden_def) |
|
195
|
754 { |
|
|
755 if (hidden_def->is_user_function ()) |
|
|
756 hides = SR_INFO_USER_FUNCTION; |
|
|
757 else if (hidden_def->is_builtin_function ()) |
|
|
758 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
759 } |
|
|
760 } |
|
|
761 |
|
|
762 eternal = sr.is_eternal (); |
|
|
763 read_only = sr.is_read_only (); |
|
|
764 |
|
1755
|
765 nm = sr.name (); |
|
195
|
766 |
|
|
767 initialized = 1; |
|
|
768 } |
|
|
769 |
|
|
770 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
2404
|
771 : initialized (s.initialized), nr (s.nr), nc (s.nc), type (s.type), |
|
|
772 hides (s.hides), eternal (s.eternal), read_only (s.read_only), |
|
|
773 nm (s.nm), const_type (s.const_type) { } |
|
195
|
774 |
|
|
775 symbol_record_info& |
|
|
776 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
777 { |
|
|
778 if (this != &s) |
|
|
779 { |
|
2404
|
780 initialized = s.initialized; |
|
|
781 nr = s.nr; |
|
|
782 nc = s.nc; |
|
195
|
783 type = s.type; |
|
|
784 hides = s.hides; |
|
|
785 eternal = s.eternal; |
|
|
786 read_only = s.read_only; |
|
1755
|
787 nm = s.nm; |
|
2404
|
788 const_type = s.const_type; |
|
195
|
789 } |
|
|
790 return *this; |
|
|
791 } |
|
|
792 |
|
|
793 int |
|
|
794 symbol_record_info::is_defined (void) const |
|
|
795 { |
|
|
796 return initialized; |
|
|
797 } |
|
|
798 |
|
|
799 int |
|
|
800 symbol_record_info::is_read_only (void) const |
|
|
801 { |
|
|
802 return read_only; |
|
|
803 } |
|
|
804 |
|
|
805 int |
|
|
806 symbol_record_info::is_eternal (void) const |
|
|
807 { |
|
|
808 return eternal; |
|
|
809 } |
|
|
810 |
|
|
811 int |
|
|
812 symbol_record_info::hides_fcn (void) const |
|
|
813 { |
|
|
814 return (hides & SR_INFO_USER_FUNCTION); |
|
|
815 } |
|
|
816 |
|
|
817 int |
|
|
818 symbol_record_info::hides_builtin (void) const |
|
|
819 { |
|
|
820 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
821 } |
|
|
822 |
|
1755
|
823 string |
|
2390
|
824 symbol_record_info::type_name (void) const |
|
195
|
825 { |
|
2404
|
826 string retval; |
|
|
827 |
|
195
|
828 if (type == symbol_def::USER_FUNCTION) |
|
2404
|
829 retval = "user function"; |
|
|
830 else if (type & symbol_def::BUILTIN_FUNCTION) |
|
195
|
831 { |
|
2404
|
832 if (type & symbol_def::TEXT_FUNCTION) |
|
|
833 retval = "text function"; |
|
|
834 else if (type & symbol_def::MAPPER_FUNCTION) |
|
|
835 retval = "mapper function"; |
|
195
|
836 else |
|
2404
|
837 retval = "builtin function"; |
|
195
|
838 } |
|
2404
|
839 else |
|
|
840 retval = const_type; |
|
|
841 |
|
|
842 return retval; |
|
195
|
843 } |
|
|
844 |
|
|
845 int |
|
|
846 symbol_record_info::is_function (void) const |
|
|
847 { |
|
|
848 return (type == symbol_def::USER_FUNCTION |
|
2404
|
849 || type == symbol_def::BUILTIN_FUNCTION |
|
|
850 || symbol_def::TEXT_FUNCTION |
|
|
851 || symbol_def::MAPPER_FUNCTION); |
|
195
|
852 } |
|
|
853 |
|
|
854 int |
|
|
855 symbol_record_info::rows (void) const |
|
|
856 { |
|
|
857 return nr; |
|
|
858 } |
|
|
859 |
|
|
860 int |
|
|
861 symbol_record_info::columns (void) const |
|
|
862 { |
|
|
863 return nc; |
|
|
864 } |
|
|
865 |
|
1755
|
866 string |
|
195
|
867 symbol_record_info::name (void) const |
|
|
868 { |
|
|
869 return nm; |
|
|
870 } |
|
|
871 |
|
767
|
872 // A symbol table. |
|
1
|
873 |
|
|
874 symbol_table::symbol_table (void) |
|
|
875 { |
|
|
876 } |
|
|
877 |
|
|
878 symbol_record * |
|
1755
|
879 symbol_table::lookup (const string& nm, int insert, int warn) |
|
1
|
880 { |
|
|
881 int index = hash (nm) & HASH_MASK; |
|
|
882 |
|
|
883 symbol_record *ptr = table[index].next (); |
|
|
884 |
|
530
|
885 while (ptr) |
|
1
|
886 { |
|
1755
|
887 if (ptr->name () == nm) |
|
1
|
888 return ptr; |
|
|
889 ptr = ptr->next (); |
|
|
890 } |
|
|
891 |
|
|
892 if (insert) |
|
|
893 { |
|
|
894 symbol_record *new_sym; |
|
|
895 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
896 table[index].chain (new_sym); |
|
1
|
897 return new_sym; |
|
|
898 } |
|
|
899 else if (warn) |
|
1755
|
900 warning ("lookup: symbol`%s' not found", nm.c_str ()); |
|
1
|
901 |
|
530
|
902 return 0; |
|
1
|
903 } |
|
|
904 |
|
|
905 void |
|
1755
|
906 symbol_table::rename (const string& old_name, const string& new_name) |
|
572
|
907 { |
|
|
908 int index = hash (old_name) & HASH_MASK; |
|
|
909 |
|
|
910 symbol_record *prev = &table[index]; |
|
|
911 symbol_record *ptr = prev->next (); |
|
|
912 |
|
|
913 while (ptr) |
|
|
914 { |
|
1755
|
915 if (ptr->name () == old_name) |
|
572
|
916 { |
|
|
917 prev->chain (ptr->next ()); |
|
|
918 |
|
|
919 index = hash (new_name) & HASH_MASK; |
|
|
920 table[index].chain (ptr); |
|
|
921 ptr->rename (new_name); |
|
|
922 |
|
|
923 return; |
|
|
924 } |
|
|
925 |
|
|
926 prev = ptr; |
|
|
927 ptr = ptr->next (); |
|
|
928 } |
|
|
929 |
|
1755
|
930 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
931 new_name.c_str ()); |
|
572
|
932 } |
|
|
933 |
|
|
934 void |
|
530
|
935 symbol_table::clear (int clear_user_functions) |
|
1
|
936 { |
|
|
937 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
938 { |
|
169
|
939 symbol_record *ptr = table[i].next (); |
|
1
|
940 |
|
530
|
941 while (ptr) |
|
169
|
942 { |
|
195
|
943 if (ptr->is_user_variable () |
|
|
944 || (clear_user_functions && ptr->is_user_function ())) |
|
|
945 { |
|
|
946 ptr->clear (); |
|
|
947 } |
|
|
948 |
|
169
|
949 ptr = ptr->next (); |
|
1
|
950 } |
|
|
951 } |
|
|
952 } |
|
|
953 |
|
|
954 int |
|
1755
|
955 symbol_table::clear (const string& nm, int clear_user_functions) |
|
1
|
956 { |
|
|
957 int index = hash (nm) & HASH_MASK; |
|
|
958 |
|
195
|
959 symbol_record *ptr = table[index].next (); |
|
1
|
960 |
|
530
|
961 while (ptr) |
|
1
|
962 { |
|
1755
|
963 if (ptr->name () == nm |
|
195
|
964 && (ptr->is_user_variable () |
|
|
965 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
966 { |
|
195
|
967 ptr->clear (); |
|
|
968 return 1; |
|
1
|
969 } |
|
195
|
970 ptr = ptr->next (); |
|
1
|
971 } |
|
|
972 |
|
|
973 return 0; |
|
|
974 } |
|
|
975 |
|
|
976 int |
|
164
|
977 symbol_table::size (void) const |
|
1
|
978 { |
|
|
979 int count = 0; |
|
|
980 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
981 { |
|
|
982 symbol_record *ptr = table[i].next (); |
|
530
|
983 while (ptr) |
|
1
|
984 { |
|
|
985 count++; |
|
|
986 ptr = ptr->next (); |
|
|
987 } |
|
|
988 } |
|
|
989 return count; |
|
|
990 } |
|
|
991 |
|
195
|
992 static inline int |
|
|
993 pstrcmp (char **a, char **b) |
|
1
|
994 { |
|
195
|
995 return strcmp (*a, *b); |
|
1
|
996 } |
|
|
997 |
|
195
|
998 static inline int |
|
|
999 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
1000 { |
|
1755
|
1001 return (a->name () == b->name ()); |
|
1
|
1002 } |
|
|
1003 |
|
867
|
1004 static int |
|
1755
|
1005 matches_patterns (const string& name, const string_vector& pats, int npats) |
|
867
|
1006 { |
|
1755
|
1007 for (int i = 0; i < npats; i++) |
|
867
|
1008 { |
|
1792
|
1009 glob_match pattern (pats[i]); |
|
|
1010 if (pattern.match (name)) |
|
867
|
1011 return 1; |
|
|
1012 } |
|
|
1013 |
|
|
1014 return 0; |
|
|
1015 } |
|
|
1016 |
|
195
|
1017 // This function should probably share code with symbol_table::list. |
|
|
1018 // XXX FIXME XXX |
|
1
|
1019 |
|
195
|
1020 symbol_record_info * |
|
1755
|
1021 symbol_table::long_list (int& count, const string_vector& pats, |
|
|
1022 int npats, int sort, unsigned type, |
|
|
1023 unsigned scope) const |
|
1
|
1024 { |
|
115
|
1025 count = 0; |
|
1
|
1026 int n = size (); |
|
|
1027 if (n == 0) |
|
530
|
1028 return 0; |
|
1
|
1029 |
|
195
|
1030 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1031 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1032 { |
|
|
1033 symbol_record *ptr = table[i].next (); |
|
530
|
1034 while (ptr) |
|
1
|
1035 { |
|
|
1036 assert (count < n); |
|
867
|
1037 |
|
195
|
1038 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
1039 |
|
195
|
1040 unsigned my_type = ptr->type (); |
|
867
|
1041 |
|
1755
|
1042 string my_name = ptr->name (); |
|
867
|
1043 |
|
|
1044 if ((type & my_type) && (scope & my_scope) |
|
|
1045 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
|
1046 symbols[count++] = symbol_record_info (*ptr); |
|
|
1047 |
|
1
|
1048 ptr = ptr->next (); |
|
|
1049 } |
|
|
1050 } |
|
195
|
1051 symbols[count] = symbol_record_info (); |
|
|
1052 |
|
530
|
1053 if (sort && symbols) |
|
195
|
1054 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
530
|
1055 (int (*)(const void*, const void*)) symbol_record_info_cmp); |
|
195
|
1056 |
|
1
|
1057 return symbols; |
|
|
1058 } |
|
|
1059 |
|
1755
|
1060 string_vector |
|
|
1061 symbol_table::list (int& count, const string_vector& pats, int npats, |
|
|
1062 int sort, unsigned type, unsigned scope) const |
|
1
|
1063 { |
|
115
|
1064 count = 0; |
|
1
|
1065 int n = size (); |
|
|
1066 if (n == 0) |
|
530
|
1067 return 0; |
|
1
|
1068 |
|
1755
|
1069 string_vector symbols (n); |
|
|
1070 |
|
1
|
1071 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1072 { |
|
|
1073 symbol_record *ptr = table[i].next (); |
|
530
|
1074 while (ptr) |
|
1
|
1075 { |
|
|
1076 assert (count < n); |
|
605
|
1077 |
|
195
|
1078 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1079 |
|
195
|
1080 unsigned my_type = ptr->type (); |
|
605
|
1081 |
|
1755
|
1082 string my_name = ptr->name (); |
|
867
|
1083 |
|
|
1084 if ((type & my_type) && (scope & my_scope) |
|
|
1085 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
1755
|
1086 symbols[count++] = ptr->name (); |
|
605
|
1087 |
|
1
|
1088 ptr = ptr->next (); |
|
|
1089 } |
|
|
1090 } |
|
1755
|
1091 |
|
|
1092 symbols.resize (count); |
|
1
|
1093 |
|
1755
|
1094 if (sort && ! symbols.empty ()) |
|
|
1095 symbols.qsort (); |
|
1
|
1096 |
|
|
1097 return symbols; |
|
|
1098 } |
|
|
1099 |
|
605
|
1100 symbol_record ** |
|
1755
|
1101 symbol_table::glob (int& count, const string& pat, unsigned type, |
|
605
|
1102 unsigned scope) const |
|
|
1103 { |
|
|
1104 count = 0; |
|
|
1105 int n = size (); |
|
|
1106 if (n == 0) |
|
|
1107 return 0; |
|
|
1108 |
|
|
1109 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1110 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1111 { |
|
|
1112 symbol_record *ptr = table[i].next (); |
|
|
1113 while (ptr) |
|
|
1114 { |
|
|
1115 assert (count < n); |
|
|
1116 |
|
|
1117 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1118 |
|
|
1119 unsigned my_type = ptr->type (); |
|
|
1120 |
|
1792
|
1121 glob_match pattern (pat); |
|
1755
|
1122 |
|
605
|
1123 if ((type & my_type) && (scope & my_scope) |
|
1792
|
1124 && pattern.match (ptr->name ())) |
|
605
|
1125 { |
|
|
1126 symbols[count++] = ptr; |
|
|
1127 } |
|
|
1128 |
|
|
1129 ptr = ptr->next (); |
|
|
1130 } |
|
|
1131 } |
|
|
1132 symbols[count] = 0; |
|
|
1133 |
|
|
1134 return symbols; |
|
|
1135 } |
|
|
1136 |
|
220
|
1137 void |
|
|
1138 symbol_table::push_context (void) |
|
|
1139 { |
|
|
1140 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1141 { |
|
|
1142 symbol_record *ptr = table[i].next (); |
|
|
1143 |
|
530
|
1144 while (ptr) |
|
220
|
1145 { |
|
|
1146 ptr->push_context (); |
|
|
1147 ptr = ptr->next (); |
|
|
1148 } |
|
|
1149 } |
|
|
1150 } |
|
|
1151 |
|
|
1152 void |
|
|
1153 symbol_table::pop_context (void) |
|
|
1154 { |
|
|
1155 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1156 { |
|
|
1157 symbol_record *ptr = table[i].next (); |
|
|
1158 |
|
530
|
1159 while (ptr) |
|
220
|
1160 { |
|
|
1161 ptr->pop_context (); |
|
|
1162 ptr = ptr->next (); |
|
|
1163 } |
|
|
1164 } |
|
|
1165 } |
|
|
1166 |
|
1
|
1167 // Chris Torek's fave hash function. |
|
|
1168 |
|
|
1169 unsigned int |
|
1755
|
1170 symbol_table::hash (const string& str) |
|
1
|
1171 { |
|
|
1172 unsigned h = 0; |
|
1755
|
1173 for (unsigned i = 0; i < str.length (); i++) |
|
|
1174 h = h * 33 + str[i]; |
|
1
|
1175 return h; |
|
|
1176 } |
|
|
1177 |
|
1962
|
1178 // Return nonzero if S is a valid identifier. |
|
|
1179 |
|
|
1180 int |
|
|
1181 valid_identifier (const char *s) |
|
|
1182 { |
|
|
1183 if (! s || ! (isalnum (*s) || *s == '_')) |
|
|
1184 return 0; |
|
|
1185 |
|
|
1186 while (*++s != '\0') |
|
|
1187 if (! (isalnum (*s) || *s == '_')) |
|
|
1188 return 0; |
|
|
1189 |
|
|
1190 return 1; |
|
|
1191 } |
|
|
1192 |
|
2790
|
1193 int |
|
|
1194 valid_identifier (const string& s) |
|
|
1195 { |
|
|
1196 return valid_identifier (s.c_str ()); |
|
|
1197 } |
|
|
1198 |
|
1
|
1199 /* |
|
|
1200 ;;; Local Variables: *** |
|
|
1201 ;;; mode: C++ *** |
|
|
1202 ;;; End: *** |
|
|
1203 */ |
