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1 // symtab.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1996 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #if defined (__GNUG__) |
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25 #pragma implementation |
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26 #endif |
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27 |
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28 #ifdef HAVE_CONFIG_H |
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29 #include <config.h> |
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30 #endif |
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31 |
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32 #include "oct-glob.h" |
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33 #include "str-vec.h" |
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34 |
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35 #include "error.h" |
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36 #include "pt-const.h" |
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37 #include "pt-fcn.h" |
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38 #include "pt-fvc.h" |
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39 #include "symtab.h" |
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40 #include "user-prefs.h" |
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41 #include "utils.h" |
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42 #include "variables.h" |
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43 |
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44 // Variables and functions. |
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45 |
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46 symbol_def::symbol_def (void) |
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47 { |
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48 init_state (); |
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49 } |
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50 |
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51 symbol_def::symbol_def (tree_constant *t) |
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52 { |
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53 init_state (); |
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54 definition = t; |
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55 type = USER_VARIABLE; |
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56 } |
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57 |
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58 symbol_def::symbol_def (tree_builtin *t, unsigned fcn_type) |
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59 { |
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60 init_state (); |
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61 definition = t; |
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62 type = BUILTIN_FUNCTION | fcn_type; |
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63 } |
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64 |
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65 symbol_def::symbol_def (tree_function *t, unsigned fcn_type) |
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66 { |
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67 init_state (); |
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68 definition = t; |
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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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79 definition = 0; |
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80 next_elem = 0; |
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81 count = 0; |
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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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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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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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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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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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128 return (type & BUILTIN_VARIABLE); |
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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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134 return (type & BUILTIN_FUNCTION); |
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195
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135 } |
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136 |
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137 void |
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138 symbol_def::define (tree_constant *t) |
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139 { |
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140 definition = t; |
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141 if (! is_builtin_variable ()) |
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142 type = USER_VARIABLE; |
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143 } |
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144 |
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145 void |
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146 symbol_def::define (tree_builtin *t, unsigned fcn_type) |
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147 { |
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148 definition = t; |
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149 type = BUILTIN_FUNCTION | fcn_type; |
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150 } |
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151 |
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152 void |
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153 symbol_def::define (tree_function *t, unsigned fcn_type) |
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154 { |
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155 definition = t; |
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156 type = USER_FUNCTION | fcn_type; |
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195
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157 } |
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158 |
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159 void |
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160 symbol_def::protect (void) |
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161 { |
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162 read_only = 1; |
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163 } |
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164 |
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165 void |
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166 symbol_def::unprotect (void) |
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167 { |
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168 read_only = 0; |
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169 |
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170 } |
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171 |
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172 void |
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173 symbol_def::make_eternal (void) |
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174 { |
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175 eternal = 1; |
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176 } |
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177 |
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178 tree_fvc * |
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179 symbol_def::def (void) const |
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180 { |
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181 return definition; |
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182 } |
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183 |
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184 string |
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185 symbol_def::help (void) const |
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186 { |
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187 return help_string; |
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188 } |
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189 |
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190 void |
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191 symbol_def::document (const string& h) |
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192 { |
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193 help_string = h; |
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194 } |
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195 |
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196 int |
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195
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197 maybe_delete (symbol_def *def) |
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198 { |
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199 int count = 0; |
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200 if (def && def->count > 0) |
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201 { |
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202 def->count--; |
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203 count = def->count; |
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204 if (def->count == 0) |
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205 delete def; |
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195
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206 } |
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207 return count; |
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208 } |
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209 |
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210 // Individual records in a symbol table. |
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211 |
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212 symbol_record::symbol_record (void) |
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213 { |
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214 init_state (); |
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215 } |
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216 |
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217 symbol_record::symbol_record (const string& n, symbol_record *nxt) |
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218 { |
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219 init_state (); |
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220 nm = n; |
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221 next_elem = nxt; |
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222 } |
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223 |
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224 void |
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225 symbol_record::init_state (void) |
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226 { |
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227 formal_param = 0; |
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228 linked_to_global = 0; |
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229 sv_fcn = 0; |
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230 definition = 0; |
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231 next_elem = 0; |
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232 } |
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233 |
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234 string |
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235 symbol_record::name (void) const |
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236 { |
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237 return nm; |
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238 } |
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239 |
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240 string |
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241 symbol_record::help (void) const |
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242 { |
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243 string retval; |
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244 if (definition) |
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245 retval = definition->help (); |
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246 return retval; |
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247 } |
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248 |
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249 tree_fvc * |
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250 symbol_record::def (void) const |
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251 { |
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252 return definition ? definition->def () : 0; |
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253 } |
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254 |
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572
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255 void |
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256 symbol_record::rename (const string& new_name) |
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572
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257 { |
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258 nm = new_name; |
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572
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259 } |
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260 |
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261 int |
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262 symbol_record::is_function (void) const |
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263 { |
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264 return definition ? definition->is_function () : 0; |
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265 } |
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266 |
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267 int |
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268 symbol_record::is_text_function (void) const |
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269 { |
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270 return definition ? definition->is_text_function () : 0; |
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271 } |
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272 |
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273 int |
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274 symbol_record::is_mapper_function (void) const |
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275 { |
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276 return definition ? definition->is_mapper_function () : 0; |
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277 } |
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278 |
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279 int |
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280 symbol_record::is_user_function (void) const |
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281 { |
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282 return definition ? definition->is_user_function () : 0; |
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283 } |
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284 |
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285 int |
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286 symbol_record::is_builtin_function (void) const |
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287 { |
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288 return definition ? definition->is_builtin_function () : 0; |
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289 } |
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290 |
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291 int |
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292 symbol_record::is_variable (void) const |
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293 { |
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294 return definition ? definition->is_variable () : 0; |
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295 } |
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296 |
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297 int |
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298 symbol_record::is_user_variable (void) const |
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299 { |
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300 return definition ? definition->is_user_variable () : 0; |
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301 } |
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302 |
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303 int |
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304 symbol_record::is_builtin_variable (void) const |
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305 { |
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306 return definition ? definition->is_builtin_variable () : 0; |
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307 } |
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308 |
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309 unsigned |
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310 symbol_record::type (void) const |
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311 { |
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312 return definition ? definition->type : 0; |
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313 } |
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314 |
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315 int |
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164
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316 symbol_record::is_defined (void) const |
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317 { |
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318 return definition ? (definition->def () != 0) : 0; |
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319 } |
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320 |
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321 int |
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322 symbol_record::is_read_only (void) const |
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323 { |
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324 return definition ? definition->read_only : 0; |
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325 } |
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326 |
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327 int |
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328 symbol_record::is_eternal (void) const |
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329 { |
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330 return definition ? definition->eternal : 0; |
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331 } |
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332 |
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333 void |
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334 symbol_record::protect (void) |
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335 { |
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336 if (definition) |
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337 { |
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338 definition->protect (); |
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339 |
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340 if (! is_defined ()) |
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341 warning ("protecting undefined variable `%s'", nm.c_str ()); |
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342 } |
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343 } |
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344 |
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345 void |
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346 symbol_record::unprotect (void) |
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347 { |
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348 if (definition) |
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349 definition->unprotect (); |
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350 } |
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351 |
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352 void |
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353 symbol_record::make_eternal (void) |
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354 { |
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355 if (definition) |
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356 { |
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357 definition->make_eternal (); |
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358 |
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359 if (! is_defined ()) |
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360 warning ("giving eternal life to undefined variable `%s'", |
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361 nm.c_str ()); |
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362 } |
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363 } |
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364 |
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365 void |
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366 symbol_record::set_sv_function (sv_Function f) |
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367 { |
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368 sv_fcn = f; |
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369 } |
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370 |
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371 int |
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372 symbol_record::define (tree_constant *t) |
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373 { |
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195
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374 if (is_variable () && read_only_error ()) |
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375 return 0; |
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376 |
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377 tree_fvc *saved_def = 0; |
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378 if (! definition) |
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195
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379 { |
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380 definition = new symbol_def (); |
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381 definition->count = 1; |
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382 } |
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383 else if (is_function ()) |
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384 { |
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195
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385 symbol_def *new_def = new symbol_def (); |
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386 push_def (new_def); |
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387 definition->count = 1; |
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388 } |
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195
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389 else if (is_variable ()) |
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390 { |
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195
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391 saved_def = definition->def (); |
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392 } |
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393 |
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195
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394 definition->define (t); |
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395 |
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396 if (sv_fcn && sv_fcn () < 0) |
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397 { |
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398 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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399 |
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195
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400 definition->define ((tree_constant *) saved_def); |
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401 return 0; |
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402 } |
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403 |
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404 delete saved_def; |
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405 |
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406 return 1; |
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407 } |
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408 |
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409 int |
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410 symbol_record::define (tree_builtin *t, int text_fcn) |
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411 { |
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195
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412 if (read_only_error ()) |
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413 return 0; |
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414 |
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195
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415 if (is_variable ()) |
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1
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416 { |
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195
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417 symbol_def *old_def = pop_def (); |
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418 maybe_delete (old_def); |
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1
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419 } |
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420 |
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195
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421 if (is_function ()) |
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1
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422 { |
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195
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423 symbol_def *old_def = pop_def (); |
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424 maybe_delete (old_def); |
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1
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425 } |
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426 |
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530
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427 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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428 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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429 : symbol_def::UNKNOWN); |
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430 |
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431 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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432 push_def (new_def); |
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433 definition->count = 1; |
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434 |
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435 return 1; |
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436 } |
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437 |
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438 int |
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530
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439 symbol_record::define (tree_function *t, int text_fcn) |
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440 { |
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195
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441 if (read_only_error ()) |
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1
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442 return 0; |
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443 |
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195
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444 if (is_variable ()) |
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1
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445 { |
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195
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446 symbol_def *old_def = pop_def (); |
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447 maybe_delete (old_def); |
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1
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448 } |
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449 |
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195
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450 if (is_function ()) |
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1
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451 { |
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195
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452 symbol_def *old_def = pop_def (); |
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453 maybe_delete (old_def); |
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1
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454 } |
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455 |
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530
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456 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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457 : symbol_def::UNKNOWN; |
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458 |
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459 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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460 push_def (new_def); |
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461 definition->count = 1; |
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462 |
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1
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463 return 1; |
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464 } |
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465 |
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466 int |
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467 symbol_record::define_as_fcn (tree_constant *t) |
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468 { |
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195
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469 if (is_variable () && read_only_error ()) |
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1
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470 return 0; |
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471 |
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195
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472 if (is_variable ()) |
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1
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473 { |
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195
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474 symbol_def *old_def = pop_def (); |
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475 maybe_delete (old_def); |
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476 } |
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477 |
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478 if (is_function ()) |
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479 { |
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480 symbol_def *old_def = pop_def (); |
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481 maybe_delete (old_def); |
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1
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482 } |
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483 |
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195
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484 symbol_def *new_def = new symbol_def (t); |
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485 push_def (new_def); |
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486 definition->count = 1; |
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487 definition->type = symbol_def::BUILTIN_FUNCTION; |
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1
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488 |
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489 return 1; |
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490 } |
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491 |
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195
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492 int |
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493 symbol_record::define_builtin_var (tree_constant *t) |
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494 { |
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495 define (t); |
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496 if (is_variable ()) |
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497 definition->type = symbol_def::BUILTIN_VARIABLE; |
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530
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498 return 1; |
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195
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499 } |
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500 |
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1
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501 void |
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1755
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502 symbol_record::document (const string& h) |
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1
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503 { |
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530
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504 if (definition) |
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195
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505 { |
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506 definition->document (h); |
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1
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507 |
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195
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508 if (! is_defined ()) |
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1755
|
509 warning ("documenting undefined variable `%s'", nm.c_str ()); |
|
195
|
510 } |
|
1
|
511 } |
|
|
512 |
|
|
513 int |
|
195
|
514 symbol_record::clear (void) |
|
1
|
515 { |
|
195
|
516 int count = 0; |
|
|
517 if (linked_to_global) |
|
1
|
518 { |
|
195
|
519 count = maybe_delete (definition); |
|
530
|
520 definition = 0; |
|
195
|
521 linked_to_global = 0; |
|
1
|
522 } |
|
195
|
523 else |
|
|
524 { |
|
|
525 symbol_def *old_def = pop_def (); |
|
|
526 count = maybe_delete (old_def); |
|
|
527 } |
|
|
528 return count; |
|
1
|
529 } |
|
|
530 |
|
|
531 void |
|
530
|
532 symbol_record::alias (symbol_record *s, int force) |
|
1
|
533 { |
|
195
|
534 sv_fcn = s->sv_fcn; |
|
|
535 |
|
530
|
536 if (force && ! s->definition) |
|
1
|
537 { |
|
195
|
538 s->definition = new symbol_def (); |
|
|
539 definition = s->definition; |
|
|
540 definition->count = 2; // Yes, this is correct. |
|
1
|
541 } |
|
530
|
542 else if (s->definition) |
|
1
|
543 { |
|
195
|
544 definition = s->definition; |
|
|
545 definition->count++; |
|
1
|
546 } |
|
|
547 } |
|
|
548 |
|
|
549 void |
|
|
550 symbol_record::mark_as_formal_parameter (void) |
|
|
551 { |
|
|
552 formal_param = 1; |
|
|
553 } |
|
|
554 |
|
|
555 int |
|
164
|
556 symbol_record::is_formal_parameter (void) const |
|
1
|
557 { |
|
|
558 return formal_param; |
|
|
559 } |
|
|
560 |
|
|
561 void |
|
195
|
562 symbol_record::mark_as_linked_to_global (void) |
|
122
|
563 { |
|
195
|
564 linked_to_global = 1; |
|
122
|
565 } |
|
|
566 |
|
|
567 int |
|
195
|
568 symbol_record::is_linked_to_global (void) const |
|
1
|
569 { |
|
195
|
570 return linked_to_global; |
|
1
|
571 } |
|
|
572 |
|
|
573 symbol_record * |
|
164
|
574 symbol_record::next (void) const |
|
1
|
575 { |
|
|
576 return next_elem; |
|
|
577 } |
|
|
578 |
|
195
|
579 void |
|
|
580 symbol_record::chain (symbol_record *s) |
|
|
581 { |
|
|
582 next_elem = s; |
|
|
583 } |
|
|
584 |
|
220
|
585 void |
|
|
586 symbol_record::push_context (void) |
|
|
587 { |
|
|
588 context.push (definition); |
|
530
|
589 definition = 0; |
|
395
|
590 |
|
|
591 global_link_context.push ((unsigned) linked_to_global); |
|
|
592 linked_to_global = 0; |
|
220
|
593 } |
|
|
594 |
|
|
595 void |
|
|
596 symbol_record::pop_context (void) |
|
|
597 { |
|
1653
|
598 // It is possible for context to be empty if new symbols have been |
|
|
599 // inserted in the symbol table during recursive calls. This can |
|
|
600 // happen as a result of calls to eval() and feval(). |
|
220
|
601 |
|
1653
|
602 if (! context.empty ()) |
|
220
|
603 { |
|
1653
|
604 if (is_variable ()) |
|
|
605 { |
|
|
606 symbol_def *old_def = pop_def (); |
|
|
607 maybe_delete (old_def); |
|
|
608 } |
|
|
609 |
|
|
610 if (is_function ()) |
|
|
611 { |
|
|
612 symbol_def *old_def = pop_def (); |
|
|
613 maybe_delete (old_def); |
|
|
614 } |
|
|
615 |
|
|
616 definition = context.pop (); |
|
|
617 linked_to_global = global_link_context.pop (); |
|
220
|
618 } |
|
|
619 } |
|
|
620 |
|
195
|
621 int |
|
|
622 symbol_record::read_only_error (void) |
|
|
623 { |
|
|
624 if (is_read_only ()) |
|
|
625 { |
|
|
626 if (is_variable ()) |
|
1045
|
627 { |
|
|
628 if (user_pref.read_only_constants) |
|
|
629 { |
|
|
630 if (user_pref.read_only_constants < 0) |
|
|
631 { |
|
1755
|
632 ::warning ("redefinition of constant `%s'", |
|
|
633 nm.c_str ()); |
|
1045
|
634 return 0; |
|
|
635 } |
|
|
636 else |
|
1755
|
637 ::error ("can't redefine read-only constant `%s'", |
|
|
638 nm.c_str ()); |
|
1045
|
639 } |
|
|
640 } |
|
195
|
641 else if (is_function ()) |
|
1045
|
642 { |
|
1755
|
643 ::error ("can't redefine read-only function `%s'", nm.c_str ()); |
|
1045
|
644 } |
|
|
645 else |
|
|
646 { |
|
1755
|
647 ::error ("can't redefine read-only symbol `%s'", nm.c_str ()); |
|
1045
|
648 } |
|
195
|
649 |
|
|
650 return 1; |
|
|
651 } |
|
|
652 else |
|
|
653 return 0; |
|
|
654 } |
|
|
655 |
|
|
656 void |
|
|
657 symbol_record::push_def (symbol_def *sd) |
|
|
658 { |
|
530
|
659 if (! sd) |
|
195
|
660 return; |
|
|
661 |
|
|
662 sd->next_elem = definition; |
|
|
663 definition = sd; |
|
|
664 } |
|
|
665 |
|
|
666 symbol_def * |
|
|
667 symbol_record::pop_def (void) |
|
|
668 { |
|
|
669 symbol_def *top = definition; |
|
530
|
670 if (definition) |
|
195
|
671 definition = definition->next_elem; |
|
|
672 return top; |
|
|
673 } |
|
|
674 |
|
767
|
675 // A structure for handling verbose information about a symbol_record. |
|
195
|
676 |
|
|
677 symbol_record_info::symbol_record_info (void) |
|
|
678 { |
|
|
679 init_state (); |
|
|
680 } |
|
|
681 |
|
|
682 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
|
683 { |
|
|
684 init_state (); |
|
|
685 |
|
|
686 type = sr.type (); |
|
|
687 |
|
|
688 if (sr.is_variable () && sr.is_defined ()) |
|
|
689 { |
|
1358
|
690 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
691 |
|
195
|
692 tree_constant *tmp = (tree_constant *) sr.def (); |
|
620
|
693 if (tmp->is_real_scalar ()) |
|
|
694 const_type = SR_INFO_SCALAR; |
|
|
695 else if (tmp->is_complex_scalar ()) |
|
|
696 const_type = SR_INFO_COMPLEX_SCALAR; |
|
|
697 else if (tmp->is_real_matrix ()) |
|
|
698 const_type = SR_INFO_MATRIX; |
|
|
699 else if (tmp->is_complex_matrix ()) |
|
|
700 const_type = SR_INFO_COMPLEX_MATRIX; |
|
|
701 else if (tmp->is_range ()) |
|
|
702 const_type = SR_INFO_RANGE; |
|
|
703 else if (tmp->is_string ()) |
|
|
704 const_type = SR_INFO_STRING; |
|
195
|
705 |
|
|
706 nr = tmp->rows (); |
|
|
707 nc = tmp->columns (); |
|
|
708 |
|
|
709 symbol_def *sr_def = sr.definition; |
|
|
710 symbol_def *hidden_def = sr_def->next_elem; |
|
530
|
711 if (hidden_def) |
|
195
|
712 { |
|
|
713 if (hidden_def->is_user_function ()) |
|
|
714 hides = SR_INFO_USER_FUNCTION; |
|
|
715 else if (hidden_def->is_builtin_function ()) |
|
|
716 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
717 } |
|
|
718 } |
|
|
719 |
|
|
720 eternal = sr.is_eternal (); |
|
|
721 read_only = sr.is_read_only (); |
|
|
722 |
|
1755
|
723 nm = sr.name (); |
|
195
|
724 |
|
|
725 initialized = 1; |
|
|
726 } |
|
|
727 |
|
|
728 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
|
729 { |
|
|
730 type = s.type; |
|
|
731 const_type = s.const_type; |
|
|
732 hides = s.hides; |
|
|
733 eternal = s.eternal; |
|
|
734 read_only = s.read_only; |
|
|
735 nr = s.nr; |
|
|
736 nc = s.nc; |
|
1755
|
737 nm = s.nm; |
|
195
|
738 initialized = s.initialized; |
|
|
739 } |
|
|
740 |
|
|
741 symbol_record_info& |
|
|
742 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
743 { |
|
|
744 if (this != &s) |
|
|
745 { |
|
|
746 type = s.type; |
|
|
747 const_type = s.const_type; |
|
|
748 hides = s.hides; |
|
|
749 eternal = s.eternal; |
|
|
750 read_only = s.read_only; |
|
|
751 nr = s.nr; |
|
|
752 nc = s.nc; |
|
1755
|
753 nm = s.nm; |
|
195
|
754 initialized = s.initialized; |
|
|
755 } |
|
|
756 return *this; |
|
|
757 } |
|
|
758 |
|
|
759 int |
|
|
760 symbol_record_info::is_defined (void) const |
|
|
761 { |
|
|
762 return initialized; |
|
|
763 } |
|
|
764 |
|
|
765 int |
|
|
766 symbol_record_info::is_read_only (void) const |
|
|
767 { |
|
|
768 return read_only; |
|
|
769 } |
|
|
770 |
|
|
771 int |
|
|
772 symbol_record_info::is_eternal (void) const |
|
|
773 { |
|
|
774 return eternal; |
|
|
775 } |
|
|
776 |
|
|
777 int |
|
|
778 symbol_record_info::hides_fcn (void) const |
|
|
779 { |
|
|
780 return (hides & SR_INFO_USER_FUNCTION); |
|
|
781 } |
|
|
782 |
|
|
783 int |
|
|
784 symbol_record_info::hides_builtin (void) const |
|
|
785 { |
|
|
786 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
787 } |
|
|
788 |
|
1755
|
789 string |
|
195
|
790 symbol_record_info::type_as_string (void) const |
|
|
791 { |
|
|
792 if (type == symbol_def::USER_FUNCTION) |
|
|
793 return "user function"; |
|
|
794 else if (type == symbol_def::BUILTIN_FUNCTION) |
|
|
795 return "builtin function"; |
|
|
796 else |
|
|
797 { |
|
|
798 if (const_type == SR_INFO_SCALAR) |
|
|
799 return "real scalar"; |
|
|
800 else if (const_type == SR_INFO_COMPLEX_SCALAR) |
|
|
801 return "complex scalar"; |
|
|
802 else if (const_type == SR_INFO_MATRIX) |
|
|
803 return "real matrix"; |
|
|
804 else if (const_type == SR_INFO_COMPLEX_MATRIX) |
|
|
805 return "complex matrix"; |
|
|
806 else if (const_type == SR_INFO_RANGE) |
|
|
807 return "range"; |
|
|
808 else if (const_type == SR_INFO_STRING) |
|
|
809 return "string"; |
|
|
810 else |
|
|
811 return ""; |
|
|
812 } |
|
|
813 } |
|
|
814 |
|
|
815 int |
|
|
816 symbol_record_info::is_function (void) const |
|
|
817 { |
|
|
818 return (type == symbol_def::USER_FUNCTION |
|
|
819 || type == symbol_def::BUILTIN_FUNCTION); |
|
|
820 } |
|
|
821 |
|
|
822 int |
|
|
823 symbol_record_info::rows (void) const |
|
|
824 { |
|
|
825 return nr; |
|
|
826 } |
|
|
827 |
|
|
828 int |
|
|
829 symbol_record_info::columns (void) const |
|
|
830 { |
|
|
831 return nc; |
|
|
832 } |
|
|
833 |
|
1755
|
834 string |
|
195
|
835 symbol_record_info::name (void) const |
|
|
836 { |
|
|
837 return nm; |
|
|
838 } |
|
|
839 |
|
|
840 void |
|
|
841 symbol_record_info::init_state (void) |
|
|
842 { |
|
|
843 initialized = 0; |
|
|
844 type = symbol_def::UNKNOWN; |
|
|
845 const_type = SR_INFO_UNKNOWN; |
|
|
846 hides = SR_INFO_NONE; |
|
|
847 eternal = 0; |
|
|
848 read_only = 0; |
|
|
849 nr = -1; |
|
|
850 nc = -1; |
|
|
851 } |
|
|
852 |
|
767
|
853 // A symbol table. |
|
1
|
854 |
|
|
855 symbol_table::symbol_table (void) |
|
|
856 { |
|
|
857 } |
|
|
858 |
|
|
859 symbol_record * |
|
1755
|
860 symbol_table::lookup (const string& nm, int insert, int warn) |
|
1
|
861 { |
|
|
862 int index = hash (nm) & HASH_MASK; |
|
|
863 |
|
|
864 symbol_record *ptr = table[index].next (); |
|
|
865 |
|
530
|
866 while (ptr) |
|
1
|
867 { |
|
1755
|
868 if (ptr->name () == nm) |
|
1
|
869 return ptr; |
|
|
870 ptr = ptr->next (); |
|
|
871 } |
|
|
872 |
|
|
873 if (insert) |
|
|
874 { |
|
|
875 symbol_record *new_sym; |
|
|
876 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
877 table[index].chain (new_sym); |
|
1
|
878 return new_sym; |
|
|
879 } |
|
|
880 else if (warn) |
|
1755
|
881 warning ("lookup: symbol`%s' not found", nm.c_str ()); |
|
1
|
882 |
|
530
|
883 return 0; |
|
1
|
884 } |
|
|
885 |
|
|
886 void |
|
1755
|
887 symbol_table::rename (const string& old_name, const string& new_name) |
|
572
|
888 { |
|
|
889 int index = hash (old_name) & HASH_MASK; |
|
|
890 |
|
|
891 symbol_record *prev = &table[index]; |
|
|
892 symbol_record *ptr = prev->next (); |
|
|
893 |
|
|
894 while (ptr) |
|
|
895 { |
|
1755
|
896 if (ptr->name () == old_name) |
|
572
|
897 { |
|
|
898 prev->chain (ptr->next ()); |
|
|
899 |
|
|
900 index = hash (new_name) & HASH_MASK; |
|
|
901 table[index].chain (ptr); |
|
|
902 ptr->rename (new_name); |
|
|
903 |
|
|
904 return; |
|
|
905 } |
|
|
906 |
|
|
907 prev = ptr; |
|
|
908 ptr = ptr->next (); |
|
|
909 } |
|
|
910 |
|
1755
|
911 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
912 new_name.c_str ()); |
|
572
|
913 } |
|
|
914 |
|
|
915 void |
|
530
|
916 symbol_table::clear (int clear_user_functions) |
|
1
|
917 { |
|
|
918 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
919 { |
|
169
|
920 symbol_record *ptr = table[i].next (); |
|
1
|
921 |
|
530
|
922 while (ptr) |
|
169
|
923 { |
|
195
|
924 if (ptr->is_user_variable () |
|
|
925 || (clear_user_functions && ptr->is_user_function ())) |
|
|
926 { |
|
|
927 ptr->clear (); |
|
|
928 } |
|
|
929 |
|
169
|
930 ptr = ptr->next (); |
|
1
|
931 } |
|
|
932 } |
|
|
933 } |
|
|
934 |
|
|
935 int |
|
1755
|
936 symbol_table::clear (const string& nm, int clear_user_functions) |
|
1
|
937 { |
|
|
938 int index = hash (nm) & HASH_MASK; |
|
|
939 |
|
195
|
940 symbol_record *ptr = table[index].next (); |
|
1
|
941 |
|
530
|
942 while (ptr) |
|
1
|
943 { |
|
1755
|
944 if (ptr->name () == nm |
|
195
|
945 && (ptr->is_user_variable () |
|
|
946 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
947 { |
|
195
|
948 ptr->clear (); |
|
|
949 return 1; |
|
1
|
950 } |
|
195
|
951 ptr = ptr->next (); |
|
1
|
952 } |
|
|
953 |
|
|
954 return 0; |
|
|
955 } |
|
|
956 |
|
|
957 int |
|
164
|
958 symbol_table::size (void) const |
|
1
|
959 { |
|
|
960 int count = 0; |
|
|
961 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
962 { |
|
|
963 symbol_record *ptr = table[i].next (); |
|
530
|
964 while (ptr) |
|
1
|
965 { |
|
|
966 count++; |
|
|
967 ptr = ptr->next (); |
|
|
968 } |
|
|
969 } |
|
|
970 return count; |
|
|
971 } |
|
|
972 |
|
195
|
973 static inline int |
|
|
974 pstrcmp (char **a, char **b) |
|
1
|
975 { |
|
195
|
976 return strcmp (*a, *b); |
|
1
|
977 } |
|
|
978 |
|
195
|
979 static inline int |
|
|
980 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
981 { |
|
1755
|
982 return (a->name () == b->name ()); |
|
1
|
983 } |
|
|
984 |
|
867
|
985 static int |
|
1755
|
986 matches_patterns (const string& name, const string_vector& pats, int npats) |
|
867
|
987 { |
|
1755
|
988 for (int i = 0; i < npats; i++) |
|
867
|
989 { |
|
1792
|
990 glob_match pattern (pats[i]); |
|
|
991 if (pattern.match (name)) |
|
867
|
992 return 1; |
|
|
993 } |
|
|
994 |
|
|
995 return 0; |
|
|
996 } |
|
|
997 |
|
195
|
998 // This function should probably share code with symbol_table::list. |
|
|
999 // XXX FIXME XXX |
|
1
|
1000 |
|
195
|
1001 symbol_record_info * |
|
1755
|
1002 symbol_table::long_list (int& count, const string_vector& pats, |
|
|
1003 int npats, int sort, unsigned type, |
|
|
1004 unsigned scope) const |
|
1
|
1005 { |
|
115
|
1006 count = 0; |
|
1
|
1007 int n = size (); |
|
|
1008 if (n == 0) |
|
530
|
1009 return 0; |
|
1
|
1010 |
|
195
|
1011 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1012 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1013 { |
|
|
1014 symbol_record *ptr = table[i].next (); |
|
530
|
1015 while (ptr) |
|
1
|
1016 { |
|
|
1017 assert (count < n); |
|
867
|
1018 |
|
195
|
1019 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
1020 |
|
195
|
1021 unsigned my_type = ptr->type (); |
|
867
|
1022 |
|
1755
|
1023 string my_name = ptr->name (); |
|
867
|
1024 |
|
|
1025 if ((type & my_type) && (scope & my_scope) |
|
|
1026 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
|
1027 symbols[count++] = symbol_record_info (*ptr); |
|
|
1028 |
|
1
|
1029 ptr = ptr->next (); |
|
|
1030 } |
|
|
1031 } |
|
195
|
1032 symbols[count] = symbol_record_info (); |
|
|
1033 |
|
530
|
1034 if (sort && symbols) |
|
195
|
1035 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
530
|
1036 (int (*)(const void*, const void*)) symbol_record_info_cmp); |
|
195
|
1037 |
|
1
|
1038 return symbols; |
|
|
1039 } |
|
|
1040 |
|
1755
|
1041 string_vector |
|
|
1042 symbol_table::list (int& count, const string_vector& pats, int npats, |
|
|
1043 int sort, unsigned type, unsigned scope) const |
|
1
|
1044 { |
|
115
|
1045 count = 0; |
|
1
|
1046 int n = size (); |
|
|
1047 if (n == 0) |
|
530
|
1048 return 0; |
|
1
|
1049 |
|
1755
|
1050 string_vector symbols (n); |
|
|
1051 |
|
1
|
1052 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1053 { |
|
|
1054 symbol_record *ptr = table[i].next (); |
|
530
|
1055 while (ptr) |
|
1
|
1056 { |
|
|
1057 assert (count < n); |
|
605
|
1058 |
|
195
|
1059 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1060 |
|
195
|
1061 unsigned my_type = ptr->type (); |
|
605
|
1062 |
|
1755
|
1063 string my_name = ptr->name (); |
|
867
|
1064 |
|
|
1065 if ((type & my_type) && (scope & my_scope) |
|
|
1066 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
1755
|
1067 symbols[count++] = ptr->name (); |
|
605
|
1068 |
|
1
|
1069 ptr = ptr->next (); |
|
|
1070 } |
|
|
1071 } |
|
1755
|
1072 |
|
|
1073 symbols.resize (count); |
|
1
|
1074 |
|
1755
|
1075 if (sort && ! symbols.empty ()) |
|
|
1076 symbols.qsort (); |
|
1
|
1077 |
|
|
1078 return symbols; |
|
|
1079 } |
|
|
1080 |
|
605
|
1081 symbol_record ** |
|
1755
|
1082 symbol_table::glob (int& count, const string& pat, unsigned type, |
|
605
|
1083 unsigned scope) const |
|
|
1084 { |
|
|
1085 count = 0; |
|
|
1086 int n = size (); |
|
|
1087 if (n == 0) |
|
|
1088 return 0; |
|
|
1089 |
|
|
1090 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1091 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1092 { |
|
|
1093 symbol_record *ptr = table[i].next (); |
|
|
1094 while (ptr) |
|
|
1095 { |
|
|
1096 assert (count < n); |
|
|
1097 |
|
|
1098 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1099 |
|
|
1100 unsigned my_type = ptr->type (); |
|
|
1101 |
|
1792
|
1102 glob_match pattern (pat); |
|
1755
|
1103 |
|
605
|
1104 if ((type & my_type) && (scope & my_scope) |
|
1792
|
1105 && pattern.match (ptr->name ())) |
|
605
|
1106 { |
|
|
1107 symbols[count++] = ptr; |
|
|
1108 } |
|
|
1109 |
|
|
1110 ptr = ptr->next (); |
|
|
1111 } |
|
|
1112 } |
|
|
1113 symbols[count] = 0; |
|
|
1114 |
|
|
1115 return symbols; |
|
|
1116 } |
|
|
1117 |
|
220
|
1118 void |
|
|
1119 symbol_table::push_context (void) |
|
|
1120 { |
|
|
1121 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1122 { |
|
|
1123 symbol_record *ptr = table[i].next (); |
|
|
1124 |
|
530
|
1125 while (ptr) |
|
220
|
1126 { |
|
|
1127 ptr->push_context (); |
|
|
1128 ptr = ptr->next (); |
|
|
1129 } |
|
|
1130 } |
|
|
1131 } |
|
|
1132 |
|
|
1133 void |
|
|
1134 symbol_table::pop_context (void) |
|
|
1135 { |
|
|
1136 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1137 { |
|
|
1138 symbol_record *ptr = table[i].next (); |
|
|
1139 |
|
530
|
1140 while (ptr) |
|
220
|
1141 { |
|
|
1142 ptr->pop_context (); |
|
|
1143 ptr = ptr->next (); |
|
|
1144 } |
|
|
1145 } |
|
|
1146 } |
|
|
1147 |
|
1
|
1148 // Chris Torek's fave hash function. |
|
|
1149 |
|
|
1150 unsigned int |
|
1755
|
1151 symbol_table::hash (const string& str) |
|
1
|
1152 { |
|
|
1153 unsigned h = 0; |
|
1755
|
1154 for (unsigned i = 0; i < str.length (); i++) |
|
|
1155 h = h * 33 + str[i]; |
|
1
|
1156 return h; |
|
|
1157 } |
|
|
1158 |
|
|
1159 /* |
|
|
1160 ;;; Local Variables: *** |
|
|
1161 ;;; mode: C++ *** |
|
|
1162 ;;; page-delimiter: "^/\\*" *** |
|
|
1163 ;;; End: *** |
|
|
1164 */ |
