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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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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2926
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33 #include "glob-match.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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2893
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37 #include "oct-sym.h" |
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38 #include "oct-fcn.h" |
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1755
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39 #include "symtab.h" |
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1
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40 #include "utils.h" |
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1352
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41 #include "variables.h" |
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1
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42 |
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767
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43 // Variables and functions. |
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44 |
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2893
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45 symbol_def::symbol_def (octave_symbol *sym, unsigned int sym_type) |
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1
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46 { |
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195
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47 init_state (); |
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2893
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48 definition = sym; |
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49 type = sym_type; |
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195
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50 } |
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51 |
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52 void |
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53 symbol_def::init_state (void) |
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54 { |
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55 type = UNKNOWN; |
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56 eternal = 0; |
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57 read_only = 0; |
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58 |
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530
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59 definition = 0; |
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60 next_elem = 0; |
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195
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61 count = 0; |
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1
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62 } |
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63 |
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64 symbol_def::~symbol_def (void) |
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65 { |
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66 delete definition; |
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67 } |
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68 |
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2856
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69 bool |
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195
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70 symbol_def::is_variable (void) const |
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71 { |
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530
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72 return (type & USER_VARIABLE || type & BUILTIN_VARIABLE); |
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195
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73 } |
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74 |
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2856
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75 bool |
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195
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76 symbol_def::is_function (void) const |
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77 { |
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530
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78 return (type & USER_FUNCTION || type & BUILTIN_FUNCTION); |
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195
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79 } |
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80 |
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2856
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81 bool |
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195
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82 symbol_def::is_user_variable (void) const |
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83 { |
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530
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84 return (type & USER_VARIABLE); |
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85 } |
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86 |
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2856
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87 bool |
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530
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88 symbol_def::is_text_function (void) const |
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89 { |
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90 return (type & TEXT_FUNCTION); |
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91 } |
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92 |
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2856
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93 bool |
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530
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94 symbol_def::is_mapper_function (void) const |
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95 { |
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96 return (type & MAPPER_FUNCTION); |
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195
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97 } |
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98 |
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2856
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99 bool |
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195
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100 symbol_def::is_user_function (void) const |
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101 { |
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530
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102 return (type & USER_FUNCTION); |
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195
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103 } |
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104 |
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2856
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105 bool |
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195
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106 symbol_def::is_builtin_variable (void) const |
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107 { |
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530
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108 return (type & BUILTIN_VARIABLE); |
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195
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109 } |
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110 |
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2856
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111 bool |
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195
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112 symbol_def::is_builtin_function (void) const |
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113 { |
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530
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114 return (type & BUILTIN_FUNCTION); |
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195
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115 } |
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116 |
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2390
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117 // XXX FIXME XXX |
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118 bool |
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2390
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119 symbol_def::is_map_element (const string& /* elts */) const |
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120 { |
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2893
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121 return false; |
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2390
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122 } |
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123 |
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1
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124 void |
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2893
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125 symbol_def::define (octave_symbol *s, unsigned int sym_type) |
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126 { |
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127 definition = s; |
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128 |
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2893
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129 type = sym_type; |
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195
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130 } |
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131 |
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132 void |
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133 symbol_def::protect (void) |
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134 { |
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135 read_only = 1; |
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136 } |
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137 |
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138 void |
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139 symbol_def::unprotect (void) |
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140 { |
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141 read_only = 0; |
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142 |
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143 } |
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144 |
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145 void |
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146 symbol_def::make_eternal (void) |
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147 { |
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148 eternal = 1; |
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1
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149 } |
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150 |
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2893
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151 octave_symbol * |
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164
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152 symbol_def::def (void) const |
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1
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153 { |
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154 return definition; |
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155 } |
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156 |
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1755
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157 string |
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164
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158 symbol_def::help (void) const |
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1
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159 { |
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160 return help_string; |
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161 } |
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162 |
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163 void |
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1755
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164 symbol_def::document (const string& h) |
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165 { |
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1755
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166 help_string = h; |
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1
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167 } |
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168 |
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169 int |
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195
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170 maybe_delete (symbol_def *def) |
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171 { |
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172 int count = 0; |
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530
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173 if (def && def->count > 0) |
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195
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174 { |
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530
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175 def->count--; |
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176 count = def->count; |
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177 if (def->count == 0) |
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178 delete def; |
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195
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179 } |
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180 return count; |
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181 } |
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182 |
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767
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183 // Individual records in a symbol table. |
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184 |
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185 symbol_record::symbol_record (void) |
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186 { |
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195
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187 init_state (); |
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1
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188 } |
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189 |
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1755
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190 symbol_record::symbol_record (const string& n, symbol_record *nxt) |
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1
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191 { |
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195
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192 init_state (); |
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1755
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193 nm = n; |
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195
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194 next_elem = nxt; |
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1
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195 } |
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196 |
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195
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197 void |
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198 symbol_record::init_state (void) |
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199 { |
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200 formal_param = 0; |
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195
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201 linked_to_global = 0; |
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2846
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202 tagged_static = 0; |
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530
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203 sv_fcn = 0; |
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204 definition = 0; |
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205 next_elem = 0; |
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1
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206 } |
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207 |
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1755
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208 string |
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164
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209 symbol_record::name (void) const |
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1
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210 { |
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211 return nm; |
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212 } |
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213 |
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1755
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214 string |
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164
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215 symbol_record::help (void) const |
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1
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216 { |
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1755
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217 string retval; |
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218 if (definition) |
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219 retval = definition->help (); |
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220 return retval; |
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1
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221 } |
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222 |
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2893
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223 octave_symbol * |
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164
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224 symbol_record::def (void) const |
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1
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225 { |
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2856
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226 return definition ? definition->def () : false; |
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1
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227 } |
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228 |
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572
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229 void |
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1755
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230 symbol_record::rename (const string& new_name) |
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572
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231 { |
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2791
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232 if (! read_only_error ("rename")) |
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233 nm = new_name; |
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572
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234 } |
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235 |
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2856
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236 bool |
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164
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237 symbol_record::is_function (void) const |
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1
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238 { |
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2856
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239 return definition ? definition->is_function () : false; |
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530
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240 } |
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241 |
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2856
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242 bool |
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530
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243 symbol_record::is_text_function (void) const |
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244 { |
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2856
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245 return definition ? definition->is_text_function () : false; |
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530
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246 } |
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247 |
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2856
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248 bool |
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530
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249 symbol_record::is_mapper_function (void) const |
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250 { |
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2856
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251 return definition ? definition->is_mapper_function () : false; |
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195
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252 } |
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253 |
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2856
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254 bool |
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195
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255 symbol_record::is_user_function (void) const |
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256 { |
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2856
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257 return definition ? definition->is_user_function () : false; |
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195
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258 } |
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259 |
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2856
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260 bool |
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195
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261 symbol_record::is_builtin_function (void) const |
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262 { |
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2856
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263 return definition ? definition->is_builtin_function () : false; |
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1
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264 } |
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265 |
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2856
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266 bool |
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164
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267 symbol_record::is_variable (void) const |
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1
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268 { |
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2856
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269 return definition ? definition->is_variable () : false; |
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195
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270 } |
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271 |
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2856
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272 bool |
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195
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273 symbol_record::is_user_variable (void) const |
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274 { |
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2856
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275 return definition ? definition->is_user_variable () : false; |
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195
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276 } |
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277 |
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2856
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278 bool |
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195
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279 symbol_record::is_builtin_variable (void) const |
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280 { |
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2856
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281 return definition ? definition->is_builtin_variable () : false; |
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195
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282 } |
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283 |
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2856
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284 bool |
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2390
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285 symbol_record::is_map_element (const string& elts) const |
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286 { |
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2856
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287 return definition ? definition->is_map_element (elts) : false; |
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2390
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288 } |
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289 |
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2893
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290 unsigned int |
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195
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291 symbol_record::type (void) const |
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292 { |
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2856
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293 return definition ? definition->type : false; |
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1
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294 } |
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295 |
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2856
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296 bool |
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164
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297 symbol_record::is_defined (void) const |
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1
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298 { |
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2856
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299 return definition ? (definition->def () != 0) : false; |
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195
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300 } |
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301 |
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2856
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302 bool |
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195
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303 symbol_record::is_read_only (void) const |
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304 { |
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2856
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305 return definition ? definition->read_only : false; |
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195
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306 } |
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307 |
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2856
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308 bool |
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195
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309 symbol_record::is_eternal (void) const |
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310 { |
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2856
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311 return definition ? definition->eternal : false; |
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195
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312 } |
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313 |
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314 void |
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315 symbol_record::protect (void) |
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316 { |
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530
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317 if (definition) |
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195
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318 { |
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319 definition->protect (); |
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320 |
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321 if (! is_defined ()) |
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1755
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322 warning ("protecting undefined variable `%s'", nm.c_str ()); |
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195
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323 } |
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324 } |
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325 |
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326 void |
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327 symbol_record::unprotect (void) |
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328 { |
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530
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329 if (definition) |
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195
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330 definition->unprotect (); |
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331 } |
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332 |
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333 void |
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334 symbol_record::make_eternal (void) |
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335 { |
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530
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336 if (definition) |
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195
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337 { |
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338 definition->make_eternal (); |
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339 |
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340 if (! is_defined ()) |
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1755
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341 warning ("giving eternal life to undefined variable `%s'", |
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342 nm.c_str ()); |
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195
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343 } |
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1
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344 } |
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345 |
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346 void |
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347 symbol_record::set_sv_function (sv_Function f) |
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348 { |
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349 sv_fcn = f; |
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350 } |
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351 |
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352 int |
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2893
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353 symbol_record::define (const octave_value& v, unsigned int sym_type) |
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1
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354 { |
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2893
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355 int retval = 0; |
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1
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356 |
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2893
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357 if (! (is_variable () && read_only_error ("redefine"))) |
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195
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358 { |
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2893
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359 octave_symbol *saved_def = 0; |
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360 unsigned int saved_type = symbol_def::UNKNOWN; |
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361 |
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362 if (! definition) |
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363 { |
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364 definition = new symbol_def (); |
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365 definition->count = 1; |
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366 } |
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367 else if (is_function ()) |
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368 { |
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369 push_def (new symbol_def ()); |
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370 definition->count = 1; |
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371 } |
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372 else if (is_variable ()) |
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373 { |
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374 saved_def = definition->def (); |
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375 saved_type = definition->symbol_type (); |
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376 } |
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377 |
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378 if (saved_type == symbol_def::BUILTIN_VARIABLE) |
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379 sym_type = saved_type; |
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380 |
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381 definition->define (new octave_value (v), sym_type); |
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382 |
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383 if (sv_fcn && sv_fcn () < 0) |
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384 definition->define (saved_def, saved_type); |
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385 else |
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386 { |
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387 retval = 1; |
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388 |
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389 delete saved_def; |
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390 } |
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1
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391 } |
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392 |
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2893
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393 return retval; |
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2390
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394 } |
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395 |
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396 int |
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2893
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397 symbol_record::define_builtin_var (const octave_value& v) |
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1
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398 { |
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2893
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399 return define (v, symbol_def::BUILTIN_VARIABLE); |
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1
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400 } |
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401 |
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402 int |
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2390
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403 symbol_record::define_as_fcn (const octave_value& v) |
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1
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404 { |
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2791
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405 if (is_variable () && read_only_error ("redefine")) |
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1
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406 return 0; |
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407 |
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195
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408 if (is_variable ()) |
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1
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409 { |
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195
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410 symbol_def *old_def = pop_def (); |
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411 maybe_delete (old_def); |
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412 } |
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413 |
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414 if (is_function ()) |
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415 { |
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416 symbol_def *old_def = pop_def (); |
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417 maybe_delete (old_def); |
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1
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418 } |
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419 |
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2893
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420 push_def (new symbol_def (new octave_value (v), |
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421 symbol_def::BUILTIN_FUNCTION)); |
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422 |
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195
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423 definition->count = 1; |
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1
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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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195
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428 int |
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2893
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429 symbol_record::define (octave_function *f, unsigned int sym_type) |
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195
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430 { |
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2893
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431 if (read_only_error ("redefine")) |
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432 return 0; |
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433 |
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195
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434 if (is_variable ()) |
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2893
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435 { |
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436 symbol_def *old_def = pop_def (); |
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437 maybe_delete (old_def); |
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438 } |
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439 |
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440 if (is_function ()) |
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441 { |
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442 symbol_def *old_def = pop_def (); |
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443 maybe_delete (old_def); |
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444 } |
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445 |
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446 push_def (new symbol_def (f, sym_type)); |
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447 |
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448 definition->count = 1; |
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449 |
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530
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450 return 1; |
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195
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451 } |
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452 |
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1
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453 void |
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1755
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454 symbol_record::document (const string& h) |
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1
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455 { |
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530
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456 if (definition) |
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195
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457 { |
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458 definition->document (h); |
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1
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459 |
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195
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460 if (! is_defined ()) |
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1755
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461 warning ("documenting undefined variable `%s'", nm.c_str ()); |
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195
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462 } |
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1
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463 } |
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464 |
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465 int |
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195
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466 symbol_record::clear (void) |
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1
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467 { |
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195
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468 int count = 0; |
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469 if (linked_to_global) |
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1
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470 { |
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195
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471 count = maybe_delete (definition); |
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530
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472 definition = 0; |
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195
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473 linked_to_global = 0; |
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1
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474 } |
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2846
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475 else if (! tagged_static) |
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195
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476 { |
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477 symbol_def *old_def = pop_def (); |
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478 count = maybe_delete (old_def); |
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479 } |
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480 return count; |
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1
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481 } |
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482 |
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483 void |
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2856
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484 symbol_record::alias (symbol_record *s, bool force) |
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1
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485 { |
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195
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486 sv_fcn = s->sv_fcn; |
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487 |
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530
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488 if (force && ! s->definition) |
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1
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489 { |
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195
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490 s->definition = new symbol_def (); |
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491 definition = s->definition; |
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492 definition->count = 2; // Yes, this is correct. |
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1
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493 } |
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530
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494 else if (s->definition) |
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1
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495 { |
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195
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496 definition = s->definition; |
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497 definition->count++; |
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1
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498 } |
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499 } |
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500 |
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501 void |
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502 symbol_record::mark_as_formal_parameter (void) |
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503 { |
|
|
504 formal_param = 1; |
|
|
505 } |
|
|
506 |
|
2856
|
507 bool |
|
164
|
508 symbol_record::is_formal_parameter (void) const |
|
1
|
509 { |
|
|
510 return formal_param; |
|
|
511 } |
|
|
512 |
|
|
513 void |
|
195
|
514 symbol_record::mark_as_linked_to_global (void) |
|
122
|
515 { |
|
195
|
516 linked_to_global = 1; |
|
122
|
517 } |
|
|
518 |
|
2856
|
519 bool |
|
195
|
520 symbol_record::is_linked_to_global (void) const |
|
1
|
521 { |
|
195
|
522 return linked_to_global; |
|
1
|
523 } |
|
|
524 |
|
2846
|
525 void |
|
|
526 symbol_record::mark_as_static (void) |
|
|
527 { |
|
|
528 if (is_linked_to_global ()) |
|
|
529 error ("can't make global variable static"); |
|
|
530 else if (is_formal_parameter ()) |
|
|
531 error ("can't make formal parameter static"); |
|
|
532 else |
|
|
533 tagged_static = 1; |
|
|
534 } |
|
|
535 |
|
2856
|
536 bool |
|
2846
|
537 symbol_record::is_static (void) const |
|
|
538 { |
|
|
539 return tagged_static; |
|
|
540 } |
|
|
541 |
|
2390
|
542 octave_value |
|
|
543 symbol_record::variable_value (void) const |
|
|
544 { |
|
|
545 octave_value retval; |
|
|
546 |
|
|
547 if (is_variable ()) |
|
|
548 { |
|
2893
|
549 octave_symbol *tmp = def (); |
|
|
550 retval = tmp->eval (); |
|
2390
|
551 } |
|
|
552 |
|
|
553 return retval; |
|
|
554 } |
|
|
555 |
|
|
556 octave_value& |
|
|
557 symbol_record::variable_reference (void) |
|
|
558 { |
|
|
559 if (is_function ()) |
|
|
560 clear (); |
|
|
561 |
|
|
562 if (! is_defined ()) |
|
|
563 { |
|
|
564 if (! (is_formal_parameter () || is_linked_to_global ())) |
|
|
565 link_to_builtin_variable (this); |
|
|
566 |
|
|
567 if (! is_defined ()) |
|
2893
|
568 define (octave_value ()); |
|
2390
|
569 } |
|
|
570 |
|
2893
|
571 octave_value *tmp = static_cast<octave_value *> (def ()); |
|
2390
|
572 |
|
2893
|
573 tmp->make_unique (); |
|
|
574 |
|
|
575 return *tmp; |
|
2390
|
576 } |
|
|
577 |
|
1
|
578 symbol_record * |
|
164
|
579 symbol_record::next (void) const |
|
1
|
580 { |
|
|
581 return next_elem; |
|
|
582 } |
|
|
583 |
|
195
|
584 void |
|
|
585 symbol_record::chain (symbol_record *s) |
|
|
586 { |
|
|
587 next_elem = s; |
|
|
588 } |
|
|
589 |
|
220
|
590 void |
|
|
591 symbol_record::push_context (void) |
|
|
592 { |
|
2846
|
593 if (! is_static ()) |
|
|
594 { |
|
|
595 context.push (definition); |
|
|
596 definition = 0; |
|
395
|
597 |
|
2893
|
598 global_link_context.push (static_cast<unsigned int> (linked_to_global)); |
|
2846
|
599 linked_to_global = 0; |
|
|
600 } |
|
220
|
601 } |
|
|
602 |
|
|
603 void |
|
|
604 symbol_record::pop_context (void) |
|
|
605 { |
|
1653
|
606 // It is possible for context to be empty if new symbols have been |
|
|
607 // inserted in the symbol table during recursive calls. This can |
|
|
608 // happen as a result of calls to eval() and feval(). |
|
220
|
609 |
|
1653
|
610 if (! context.empty ()) |
|
220
|
611 { |
|
1653
|
612 if (is_variable ()) |
|
|
613 { |
|
|
614 symbol_def *old_def = pop_def (); |
|
|
615 maybe_delete (old_def); |
|
|
616 } |
|
|
617 |
|
|
618 if (is_function ()) |
|
|
619 { |
|
|
620 symbol_def *old_def = pop_def (); |
|
|
621 maybe_delete (old_def); |
|
|
622 } |
|
|
623 |
|
|
624 definition = context.pop (); |
|
|
625 linked_to_global = global_link_context.pop (); |
|
220
|
626 } |
|
|
627 } |
|
|
628 |
|
195
|
629 int |
|
2791
|
630 symbol_record::read_only_error (const char *action) |
|
195
|
631 { |
|
|
632 if (is_read_only ()) |
|
|
633 { |
|
|
634 if (is_variable ()) |
|
1045
|
635 { |
|
2791
|
636 ::error ("can't %s read-only constant `%s'", action, nm.c_str ()); |
|
1045
|
637 } |
|
195
|
638 else if (is_function ()) |
|
1045
|
639 { |
|
2791
|
640 ::error ("can't %s read-only function `%s'", action, nm.c_str ()); |
|
1045
|
641 } |
|
|
642 else |
|
|
643 { |
|
2791
|
644 ::error ("can't %s read-only symbol `%s'", action, nm.c_str ()); |
|
1045
|
645 } |
|
195
|
646 |
|
|
647 return 1; |
|
|
648 } |
|
|
649 else |
|
|
650 return 0; |
|
|
651 } |
|
|
652 |
|
|
653 void |
|
|
654 symbol_record::push_def (symbol_def *sd) |
|
|
655 { |
|
530
|
656 if (! sd) |
|
195
|
657 return; |
|
|
658 |
|
|
659 sd->next_elem = definition; |
|
|
660 definition = sd; |
|
|
661 } |
|
|
662 |
|
|
663 symbol_def * |
|
|
664 symbol_record::pop_def (void) |
|
|
665 { |
|
|
666 symbol_def *top = definition; |
|
530
|
667 if (definition) |
|
195
|
668 definition = definition->next_elem; |
|
|
669 return top; |
|
|
670 } |
|
|
671 |
|
767
|
672 // A structure for handling verbose information about a symbol_record. |
|
195
|
673 |
|
|
674 symbol_record_info::symbol_record_info (void) |
|
2404
|
675 : initialized (0), nr (-1), nc (-1), type (symbol_def::UNKNOWN), |
|
|
676 hides (SR_INFO_NONE), eternal (0), read_only (0), nm (), |
|
|
677 const_type () { } |
|
195
|
678 |
|
|
679 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
2404
|
680 : initialized (0), nr (-1), nc (-1), type (sr.type ()), |
|
|
681 hides (SR_INFO_NONE), eternal (0), read_only (0), nm (), |
|
|
682 const_type () |
|
195
|
683 { |
|
|
684 if (sr.is_variable () && sr.is_defined ()) |
|
|
685 { |
|
1358
|
686 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
687 |
|
2893
|
688 octave_symbol *tmp = sr.def (); |
|
2404
|
689 |
|
2893
|
690 octave_value vtmp = tmp->eval (); |
|
195
|
691 |
|
2878
|
692 const_type = vtmp.type_name (); |
|
|
693 |
|
|
694 nr = vtmp.rows (); |
|
|
695 nc = vtmp.columns (); |
|
195
|
696 |
|
|
697 symbol_def *sr_def = sr.definition; |
|
|
698 symbol_def *hidden_def = sr_def->next_elem; |
|
2404
|
699 |
|
530
|
700 if (hidden_def) |
|
195
|
701 { |
|
|
702 if (hidden_def->is_user_function ()) |
|
|
703 hides = SR_INFO_USER_FUNCTION; |
|
|
704 else if (hidden_def->is_builtin_function ()) |
|
|
705 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
706 } |
|
|
707 } |
|
|
708 |
|
|
709 eternal = sr.is_eternal (); |
|
|
710 read_only = sr.is_read_only (); |
|
|
711 |
|
1755
|
712 nm = sr.name (); |
|
195
|
713 |
|
|
714 initialized = 1; |
|
|
715 } |
|
|
716 |
|
|
717 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
2404
|
718 : initialized (s.initialized), nr (s.nr), nc (s.nc), type (s.type), |
|
|
719 hides (s.hides), eternal (s.eternal), read_only (s.read_only), |
|
|
720 nm (s.nm), const_type (s.const_type) { } |
|
195
|
721 |
|
|
722 symbol_record_info& |
|
|
723 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
724 { |
|
|
725 if (this != &s) |
|
|
726 { |
|
2404
|
727 initialized = s.initialized; |
|
|
728 nr = s.nr; |
|
|
729 nc = s.nc; |
|
195
|
730 type = s.type; |
|
|
731 hides = s.hides; |
|
|
732 eternal = s.eternal; |
|
|
733 read_only = s.read_only; |
|
1755
|
734 nm = s.nm; |
|
2404
|
735 const_type = s.const_type; |
|
195
|
736 } |
|
|
737 return *this; |
|
|
738 } |
|
|
739 |
|
2856
|
740 bool |
|
195
|
741 symbol_record_info::is_defined (void) const |
|
|
742 { |
|
|
743 return initialized; |
|
|
744 } |
|
|
745 |
|
2856
|
746 bool |
|
195
|
747 symbol_record_info::is_read_only (void) const |
|
|
748 { |
|
|
749 return read_only; |
|
|
750 } |
|
|
751 |
|
2856
|
752 bool |
|
195
|
753 symbol_record_info::is_eternal (void) const |
|
|
754 { |
|
|
755 return eternal; |
|
|
756 } |
|
|
757 |
|
2856
|
758 bool |
|
195
|
759 symbol_record_info::hides_fcn (void) const |
|
|
760 { |
|
|
761 return (hides & SR_INFO_USER_FUNCTION); |
|
|
762 } |
|
|
763 |
|
2856
|
764 bool |
|
195
|
765 symbol_record_info::hides_builtin (void) const |
|
|
766 { |
|
|
767 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
768 } |
|
|
769 |
|
1755
|
770 string |
|
2390
|
771 symbol_record_info::type_name (void) const |
|
195
|
772 { |
|
2404
|
773 string retval; |
|
|
774 |
|
195
|
775 if (type == symbol_def::USER_FUNCTION) |
|
2404
|
776 retval = "user function"; |
|
|
777 else if (type & symbol_def::BUILTIN_FUNCTION) |
|
195
|
778 { |
|
2404
|
779 if (type & symbol_def::TEXT_FUNCTION) |
|
|
780 retval = "text function"; |
|
|
781 else if (type & symbol_def::MAPPER_FUNCTION) |
|
|
782 retval = "mapper function"; |
|
195
|
783 else |
|
2404
|
784 retval = "builtin function"; |
|
195
|
785 } |
|
2404
|
786 else |
|
|
787 retval = const_type; |
|
|
788 |
|
|
789 return retval; |
|
195
|
790 } |
|
|
791 |
|
2856
|
792 bool |
|
195
|
793 symbol_record_info::is_function (void) const |
|
|
794 { |
|
|
795 return (type == symbol_def::USER_FUNCTION |
|
2404
|
796 || type == symbol_def::BUILTIN_FUNCTION |
|
|
797 || symbol_def::TEXT_FUNCTION |
|
|
798 || symbol_def::MAPPER_FUNCTION); |
|
195
|
799 } |
|
|
800 |
|
|
801 int |
|
|
802 symbol_record_info::rows (void) const |
|
|
803 { |
|
|
804 return nr; |
|
|
805 } |
|
|
806 |
|
|
807 int |
|
|
808 symbol_record_info::columns (void) const |
|
|
809 { |
|
|
810 return nc; |
|
|
811 } |
|
|
812 |
|
1755
|
813 string |
|
195
|
814 symbol_record_info::name (void) const |
|
|
815 { |
|
|
816 return nm; |
|
|
817 } |
|
|
818 |
|
767
|
819 // A symbol table. |
|
1
|
820 |
|
|
821 symbol_table::symbol_table (void) |
|
|
822 { |
|
|
823 } |
|
|
824 |
|
|
825 symbol_record * |
|
2856
|
826 symbol_table::lookup (const string& nm, bool insert, bool warn) |
|
1
|
827 { |
|
|
828 int index = hash (nm) & HASH_MASK; |
|
|
829 |
|
|
830 symbol_record *ptr = table[index].next (); |
|
|
831 |
|
530
|
832 while (ptr) |
|
1
|
833 { |
|
1755
|
834 if (ptr->name () == nm) |
|
1
|
835 return ptr; |
|
|
836 ptr = ptr->next (); |
|
|
837 } |
|
|
838 |
|
|
839 if (insert) |
|
|
840 { |
|
|
841 symbol_record *new_sym; |
|
|
842 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
843 table[index].chain (new_sym); |
|
1
|
844 return new_sym; |
|
|
845 } |
|
|
846 else if (warn) |
|
1755
|
847 warning ("lookup: symbol`%s' not found", nm.c_str ()); |
|
1
|
848 |
|
530
|
849 return 0; |
|
1
|
850 } |
|
|
851 |
|
|
852 void |
|
1755
|
853 symbol_table::rename (const string& old_name, const string& new_name) |
|
572
|
854 { |
|
|
855 int index = hash (old_name) & HASH_MASK; |
|
|
856 |
|
|
857 symbol_record *prev = &table[index]; |
|
|
858 symbol_record *ptr = prev->next (); |
|
|
859 |
|
|
860 while (ptr) |
|
|
861 { |
|
1755
|
862 if (ptr->name () == old_name) |
|
572
|
863 { |
|
|
864 ptr->rename (new_name); |
|
|
865 |
|
2791
|
866 if (! error_state) |
|
|
867 { |
|
|
868 prev->chain (ptr->next ()); |
|
|
869 |
|
|
870 index = hash (new_name) & HASH_MASK; |
|
|
871 table[index].chain (ptr); |
|
|
872 |
|
|
873 return; |
|
|
874 } |
|
|
875 |
|
|
876 break; |
|
572
|
877 } |
|
|
878 |
|
|
879 prev = ptr; |
|
|
880 ptr = ptr->next (); |
|
|
881 } |
|
|
882 |
|
1755
|
883 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
884 new_name.c_str ()); |
|
572
|
885 } |
|
|
886 |
|
|
887 void |
|
2856
|
888 symbol_table::clear (bool clear_user_functions) |
|
1
|
889 { |
|
|
890 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
891 { |
|
169
|
892 symbol_record *ptr = table[i].next (); |
|
1
|
893 |
|
530
|
894 while (ptr) |
|
169
|
895 { |
|
195
|
896 if (ptr->is_user_variable () |
|
|
897 || (clear_user_functions && ptr->is_user_function ())) |
|
|
898 { |
|
|
899 ptr->clear (); |
|
|
900 } |
|
|
901 |
|
169
|
902 ptr = ptr->next (); |
|
1
|
903 } |
|
|
904 } |
|
|
905 } |
|
|
906 |
|
|
907 int |
|
2856
|
908 symbol_table::clear (const string& nm, bool clear_user_functions) |
|
1
|
909 { |
|
|
910 int index = hash (nm) & HASH_MASK; |
|
|
911 |
|
195
|
912 symbol_record *ptr = table[index].next (); |
|
1
|
913 |
|
530
|
914 while (ptr) |
|
1
|
915 { |
|
1755
|
916 if (ptr->name () == nm |
|
195
|
917 && (ptr->is_user_variable () |
|
|
918 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
919 { |
|
195
|
920 ptr->clear (); |
|
|
921 return 1; |
|
1
|
922 } |
|
195
|
923 ptr = ptr->next (); |
|
1
|
924 } |
|
|
925 |
|
|
926 return 0; |
|
|
927 } |
|
|
928 |
|
|
929 int |
|
164
|
930 symbol_table::size (void) const |
|
1
|
931 { |
|
|
932 int count = 0; |
|
|
933 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
934 { |
|
|
935 symbol_record *ptr = table[i].next (); |
|
530
|
936 while (ptr) |
|
1
|
937 { |
|
|
938 count++; |
|
|
939 ptr = ptr->next (); |
|
|
940 } |
|
|
941 } |
|
|
942 return count; |
|
|
943 } |
|
|
944 |
|
195
|
945 static inline int |
|
|
946 pstrcmp (char **a, char **b) |
|
1
|
947 { |
|
195
|
948 return strcmp (*a, *b); |
|
1
|
949 } |
|
|
950 |
|
195
|
951 static inline int |
|
|
952 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
953 { |
|
1755
|
954 return (a->name () == b->name ()); |
|
1
|
955 } |
|
|
956 |
|
867
|
957 static int |
|
1755
|
958 matches_patterns (const string& name, const string_vector& pats, int npats) |
|
867
|
959 { |
|
1755
|
960 for (int i = 0; i < npats; i++) |
|
867
|
961 { |
|
1792
|
962 glob_match pattern (pats[i]); |
|
|
963 if (pattern.match (name)) |
|
867
|
964 return 1; |
|
|
965 } |
|
|
966 |
|
|
967 return 0; |
|
|
968 } |
|
|
969 |
|
195
|
970 // This function should probably share code with symbol_table::list. |
|
|
971 // XXX FIXME XXX |
|
1
|
972 |
|
195
|
973 symbol_record_info * |
|
1755
|
974 symbol_table::long_list (int& count, const string_vector& pats, |
|
2893
|
975 int npats, bool sort, unsigned int type, |
|
|
976 unsigned int scope) const |
|
1
|
977 { |
|
115
|
978 count = 0; |
|
1
|
979 int n = size (); |
|
|
980 if (n == 0) |
|
530
|
981 return 0; |
|
1
|
982 |
|
195
|
983 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
984 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
985 { |
|
|
986 symbol_record *ptr = table[i].next (); |
|
530
|
987 while (ptr) |
|
1
|
988 { |
|
|
989 assert (count < n); |
|
867
|
990 |
|
2893
|
991 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
992 |
|
2893
|
993 unsigned int my_type = ptr->type (); |
|
867
|
994 |
|
1755
|
995 string my_name = ptr->name (); |
|
867
|
996 |
|
|
997 if ((type & my_type) && (scope & my_scope) |
|
|
998 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
|
999 symbols[count++] = symbol_record_info (*ptr); |
|
|
1000 |
|
1
|
1001 ptr = ptr->next (); |
|
|
1002 } |
|
|
1003 } |
|
195
|
1004 symbols[count] = symbol_record_info (); |
|
|
1005 |
|
530
|
1006 if (sort && symbols) |
|
2800
|
1007 qsort (symbols, count, sizeof (symbol_record_info), |
|
|
1008 symbol_record_info_cmp); |
|
195
|
1009 |
|
1
|
1010 return symbols; |
|
|
1011 } |
|
|
1012 |
|
1755
|
1013 string_vector |
|
|
1014 symbol_table::list (int& count, const string_vector& pats, int npats, |
|
2893
|
1015 bool sort, unsigned int type, unsigned int scope) const |
|
1
|
1016 { |
|
115
|
1017 count = 0; |
|
1
|
1018 int n = size (); |
|
|
1019 if (n == 0) |
|
530
|
1020 return 0; |
|
1
|
1021 |
|
1755
|
1022 string_vector symbols (n); |
|
|
1023 |
|
1
|
1024 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1025 { |
|
|
1026 symbol_record *ptr = table[i].next (); |
|
530
|
1027 while (ptr) |
|
1
|
1028 { |
|
|
1029 assert (count < n); |
|
605
|
1030 |
|
2893
|
1031 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1032 |
|
2893
|
1033 unsigned int my_type = ptr->type (); |
|
605
|
1034 |
|
1755
|
1035 string my_name = ptr->name (); |
|
867
|
1036 |
|
|
1037 if ((type & my_type) && (scope & my_scope) |
|
|
1038 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
1755
|
1039 symbols[count++] = ptr->name (); |
|
605
|
1040 |
|
1
|
1041 ptr = ptr->next (); |
|
|
1042 } |
|
|
1043 } |
|
1755
|
1044 |
|
|
1045 symbols.resize (count); |
|
1
|
1046 |
|
1755
|
1047 if (sort && ! symbols.empty ()) |
|
|
1048 symbols.qsort (); |
|
1
|
1049 |
|
|
1050 return symbols; |
|
|
1051 } |
|
|
1052 |
|
605
|
1053 symbol_record ** |
|
2893
|
1054 symbol_table::glob (int& count, const string& pat, unsigned int type, |
|
|
1055 unsigned int scope) const |
|
605
|
1056 { |
|
|
1057 count = 0; |
|
|
1058 int n = size (); |
|
|
1059 if (n == 0) |
|
|
1060 return 0; |
|
|
1061 |
|
|
1062 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1063 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1064 { |
|
|
1065 symbol_record *ptr = table[i].next (); |
|
|
1066 while (ptr) |
|
|
1067 { |
|
|
1068 assert (count < n); |
|
|
1069 |
|
2893
|
1070 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1071 |
|
2893
|
1072 unsigned int my_type = ptr->type (); |
|
605
|
1073 |
|
1792
|
1074 glob_match pattern (pat); |
|
1755
|
1075 |
|
605
|
1076 if ((type & my_type) && (scope & my_scope) |
|
1792
|
1077 && pattern.match (ptr->name ())) |
|
605
|
1078 { |
|
|
1079 symbols[count++] = ptr; |
|
|
1080 } |
|
|
1081 |
|
|
1082 ptr = ptr->next (); |
|
|
1083 } |
|
|
1084 } |
|
|
1085 symbols[count] = 0; |
|
|
1086 |
|
|
1087 return symbols; |
|
|
1088 } |
|
|
1089 |
|
220
|
1090 void |
|
|
1091 symbol_table::push_context (void) |
|
|
1092 { |
|
|
1093 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1094 { |
|
|
1095 symbol_record *ptr = table[i].next (); |
|
|
1096 |
|
530
|
1097 while (ptr) |
|
220
|
1098 { |
|
|
1099 ptr->push_context (); |
|
|
1100 ptr = ptr->next (); |
|
|
1101 } |
|
|
1102 } |
|
|
1103 } |
|
|
1104 |
|
|
1105 void |
|
|
1106 symbol_table::pop_context (void) |
|
|
1107 { |
|
|
1108 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1109 { |
|
|
1110 symbol_record *ptr = table[i].next (); |
|
|
1111 |
|
530
|
1112 while (ptr) |
|
220
|
1113 { |
|
|
1114 ptr->pop_context (); |
|
|
1115 ptr = ptr->next (); |
|
|
1116 } |
|
|
1117 } |
|
|
1118 } |
|
|
1119 |
|
1
|
1120 // Chris Torek's fave hash function. |
|
|
1121 |
|
|
1122 unsigned int |
|
1755
|
1123 symbol_table::hash (const string& str) |
|
1
|
1124 { |
|
2893
|
1125 unsigned int h = 0; |
|
|
1126 for (unsigned int i = 0; i < str.length (); i++) |
|
1755
|
1127 h = h * 33 + str[i]; |
|
1
|
1128 return h; |
|
|
1129 } |
|
|
1130 |
|
1962
|
1131 // Return nonzero if S is a valid identifier. |
|
|
1132 |
|
2856
|
1133 bool |
|
1962
|
1134 valid_identifier (const char *s) |
|
|
1135 { |
|
|
1136 if (! s || ! (isalnum (*s) || *s == '_')) |
|
2856
|
1137 return false; |
|
1962
|
1138 |
|
|
1139 while (*++s != '\0') |
|
|
1140 if (! (isalnum (*s) || *s == '_')) |
|
2856
|
1141 return false; |
|
1962
|
1142 |
|
2856
|
1143 return true; |
|
1962
|
1144 } |
|
|
1145 |
|
2856
|
1146 bool |
|
2790
|
1147 valid_identifier (const string& s) |
|
|
1148 { |
|
|
1149 return valid_identifier (s.c_str ()); |
|
|
1150 } |
|
|
1151 |
|
1
|
1152 /* |
|
|
1153 ;;; Local Variables: *** |
|
|
1154 ;;; mode: C++ *** |
|
|
1155 ;;; End: *** |
|
|
1156 */ |
