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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) 1992, 1993, 1994, 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include "symtab.h" |
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29 #include "error.h" |
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30 #include "variables.h" |
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31 #include "utils.h" |
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32 #include "user-prefs.h" |
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33 #include "tree-base.h" |
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34 #include "tree-expr.h" |
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35 #include "tree-const.h" |
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36 |
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37 extern "C" |
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38 { |
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39 #include "fnmatch.h" |
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40 } |
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41 |
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42 // Variables and functions. |
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43 |
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44 symbol_def::symbol_def (void) |
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45 { |
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46 init_state (); |
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47 } |
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48 |
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49 symbol_def::symbol_def (tree_constant *t) |
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50 { |
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51 init_state (); |
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52 definition = t; |
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53 type = USER_VARIABLE; |
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54 } |
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55 |
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56 symbol_def::symbol_def (tree_builtin *t, unsigned fcn_type) |
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57 { |
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58 init_state (); |
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59 definition = t; |
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60 type = BUILTIN_FUNCTION | fcn_type; |
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61 } |
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62 |
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63 symbol_def::symbol_def (tree_function *t, unsigned fcn_type) |
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64 { |
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65 init_state (); |
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66 definition = t; |
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67 type = USER_FUNCTION | fcn_type; |
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195
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68 } |
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69 |
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70 void |
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71 symbol_def::init_state (void) |
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72 { |
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73 type = UNKNOWN; |
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74 eternal = 0; |
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75 read_only = 0; |
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76 |
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77 help_string = 0; |
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78 definition = 0; |
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79 next_elem = 0; |
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195
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80 count = 0; |
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81 } |
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82 |
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83 symbol_def::~symbol_def (void) |
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84 { |
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85 delete [] help_string; |
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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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195
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129 } |
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130 |
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131 int |
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132 symbol_def::is_builtin_function (void) const |
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133 { |
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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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195
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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 char * |
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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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164
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191 symbol_def::document (const char *h) |
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192 { |
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193 delete [] help_string; |
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194 help_string = strsave (h); |
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195 } |
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196 |
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197 int |
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195
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198 maybe_delete (symbol_def *def) |
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199 { |
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200 int count = 0; |
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201 if (def && def->count > 0) |
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195
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202 { |
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203 def->count--; |
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204 count = def->count; |
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205 if (def->count == 0) |
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206 delete def; |
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195
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207 } |
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208 return count; |
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209 } |
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210 |
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211 // Individual records in a symbol table. |
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212 |
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213 symbol_record::symbol_record (void) |
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214 { |
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195
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215 init_state (); |
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216 } |
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217 |
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218 symbol_record::symbol_record (const char *n, symbol_record *nxt) |
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219 { |
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220 init_state (); |
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221 nm = strsave (n); |
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222 next_elem = nxt; |
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223 } |
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224 |
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195
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225 void |
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226 symbol_record::init_state (void) |
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227 { |
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228 formal_param = 0; |
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229 linked_to_global = 0; |
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230 nm = 0; |
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231 sv_fcn = 0; |
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232 definition = 0; |
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233 next_elem = 0; |
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234 } |
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235 |
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236 symbol_record::~symbol_record (void) |
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237 { |
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238 delete [] nm; |
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239 } |
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240 |
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241 char * |
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242 symbol_record::name (void) const |
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243 { |
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244 return nm; |
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245 } |
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246 |
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247 char * |
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248 symbol_record::help (void) const |
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249 { |
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250 return definition ? definition->help () : 0; |
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251 } |
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252 |
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253 tree_fvc * |
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254 symbol_record::def (void) const |
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255 { |
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256 return definition ? definition->def () : 0; |
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257 } |
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258 |
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572
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259 void |
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260 symbol_record::rename (const char *new_name) |
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261 { |
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262 delete [] nm; |
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263 nm = strsave (new_name); |
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264 } |
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265 |
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266 int |
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267 symbol_record::is_function (void) const |
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268 { |
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269 return definition ? definition->is_function () : 0; |
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270 } |
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271 |
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272 int |
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273 symbol_record::is_text_function (void) const |
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274 { |
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275 return definition ? definition->is_text_function () : 0; |
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276 } |
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277 |
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278 int |
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279 symbol_record::is_mapper_function (void) const |
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280 { |
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281 return definition ? definition->is_mapper_function () : 0; |
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282 } |
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283 |
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284 int |
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285 symbol_record::is_user_function (void) const |
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286 { |
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287 return definition ? definition->is_user_function () : 0; |
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288 } |
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289 |
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290 int |
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291 symbol_record::is_builtin_function (void) const |
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292 { |
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293 return definition ? definition->is_builtin_function () : 0; |
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294 } |
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295 |
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296 int |
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297 symbol_record::is_variable (void) const |
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298 { |
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299 return definition ? definition->is_variable () : 0; |
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300 } |
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301 |
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302 int |
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303 symbol_record::is_user_variable (void) const |
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304 { |
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305 return definition ? definition->is_user_variable () : 0; |
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306 } |
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307 |
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308 int |
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309 symbol_record::is_builtin_variable (void) const |
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310 { |
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311 return definition ? definition->is_builtin_variable () : 0; |
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312 } |
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313 |
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314 unsigned |
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315 symbol_record::type (void) const |
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316 { |
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317 return definition ? definition->type : 0; |
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318 } |
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319 |
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320 int |
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164
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321 symbol_record::is_defined (void) const |
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322 { |
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323 return definition ? (definition->def () != 0) : 0; |
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324 } |
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325 |
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326 int |
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327 symbol_record::is_read_only (void) const |
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328 { |
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329 return definition ? definition->read_only : 0; |
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330 } |
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331 |
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332 int |
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333 symbol_record::is_eternal (void) const |
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334 { |
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335 return definition ? definition->eternal : 0; |
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336 } |
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337 |
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338 void |
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339 symbol_record::protect (void) |
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340 { |
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341 if (definition) |
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342 { |
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343 definition->protect (); |
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344 |
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345 if (! is_defined ()) |
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346 warning ("protecting undefined variable `%s'", nm); |
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347 } |
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348 } |
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349 |
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350 void |
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351 symbol_record::unprotect (void) |
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352 { |
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353 if (definition) |
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354 definition->unprotect (); |
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355 } |
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356 |
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357 void |
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358 symbol_record::make_eternal (void) |
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359 { |
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360 if (definition) |
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361 { |
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362 definition->make_eternal (); |
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363 |
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364 if (! is_defined ()) |
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365 warning ("giving eternal life to undefined variable `%s'", nm); |
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366 } |
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367 } |
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368 |
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369 void |
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370 symbol_record::set_sv_function (sv_Function f) |
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371 { |
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372 sv_fcn = f; |
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373 } |
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374 |
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375 int |
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376 symbol_record::define (tree_constant *t) |
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377 { |
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195
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378 if (is_variable () && read_only_error ()) |
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379 return 0; |
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380 |
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381 tree_fvc *saved_def = 0; |
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382 if (! definition) |
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195
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383 { |
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384 definition = new symbol_def (); |
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385 definition->count = 1; |
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386 } |
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387 else if (is_function ()) |
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388 { |
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195
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389 symbol_def *new_def = new symbol_def (); |
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390 push_def (new_def); |
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391 definition->count = 1; |
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392 } |
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195
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393 else if (is_variable ()) |
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394 { |
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195
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395 saved_def = definition->def (); |
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396 } |
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397 |
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195
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398 definition->define (t); |
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399 |
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400 if (sv_fcn && sv_fcn () < 0) |
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401 { |
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195
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402 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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403 definition->define ((tree_constant *) saved_def); |
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404 delete t; |
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405 return 0; |
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406 } |
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407 |
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408 delete saved_def; |
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409 |
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410 return 1; |
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411 } |
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412 |
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413 int |
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530
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414 symbol_record::define (tree_builtin *t, int text_fcn) |
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415 { |
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195
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416 if (read_only_error ()) |
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417 return 0; |
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418 |
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195
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419 if (is_variable ()) |
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1
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420 { |
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195
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421 symbol_def *old_def = pop_def (); |
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422 maybe_delete (old_def); |
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1
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423 } |
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424 |
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195
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425 if (is_function ()) |
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1
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426 { |
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195
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427 symbol_def *old_def = pop_def (); |
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428 maybe_delete (old_def); |
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1
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429 } |
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430 |
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530
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431 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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432 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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433 : symbol_def::UNKNOWN); |
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434 |
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435 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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436 push_def (new_def); |
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437 definition->count = 1; |
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438 |
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439 return 1; |
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440 } |
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441 |
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442 int |
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530
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443 symbol_record::define (tree_function *t, int text_fcn) |
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1
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444 { |
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195
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445 if (read_only_error ()) |
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1
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446 return 0; |
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447 |
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195
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448 if (is_variable ()) |
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1
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449 { |
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195
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450 symbol_def *old_def = pop_def (); |
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451 maybe_delete (old_def); |
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1
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452 } |
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453 |
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195
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454 if (is_function ()) |
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1
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455 { |
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195
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456 symbol_def *old_def = pop_def (); |
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457 maybe_delete (old_def); |
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1
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458 } |
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459 |
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530
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460 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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461 : symbol_def::UNKNOWN; |
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462 |
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463 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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464 push_def (new_def); |
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465 definition->count = 1; |
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466 |
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1
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467 return 1; |
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468 } |
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469 |
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470 int |
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471 symbol_record::define_as_fcn (tree_constant *t) |
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472 { |
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195
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473 if (is_variable () && read_only_error ()) |
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1
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474 return 0; |
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475 |
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195
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476 if (is_variable ()) |
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1
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477 { |
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195
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478 symbol_def *old_def = pop_def (); |
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479 maybe_delete (old_def); |
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480 } |
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481 |
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482 if (is_function ()) |
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483 { |
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484 symbol_def *old_def = pop_def (); |
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485 maybe_delete (old_def); |
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1
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486 } |
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487 |
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195
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488 symbol_def *new_def = new symbol_def (t); |
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489 push_def (new_def); |
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490 definition->count = 1; |
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491 definition->type = symbol_def::BUILTIN_FUNCTION; |
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1
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492 |
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493 return 1; |
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494 } |
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495 |
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195
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496 int |
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497 symbol_record::define_builtin_var (tree_constant *t) |
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498 { |
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499 define (t); |
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500 if (is_variable ()) |
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501 definition->type = symbol_def::BUILTIN_VARIABLE; |
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530
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502 return 1; |
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195
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503 } |
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504 |
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1
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505 void |
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164
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506 symbol_record::document (const char *h) |
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1
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507 { |
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530
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508 if (definition) |
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195
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509 { |
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510 definition->document (h); |
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1
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511 |
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195
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512 if (! is_defined ()) |
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513 warning ("documenting undefined variable `%s'", nm); |
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514 } |
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1
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515 } |
|
|
516 |
|
|
517 int |
|
195
|
518 symbol_record::clear (void) |
|
1
|
519 { |
|
195
|
520 int count = 0; |
|
|
521 if (linked_to_global) |
|
1
|
522 { |
|
195
|
523 count = maybe_delete (definition); |
|
530
|
524 definition = 0; |
|
195
|
525 linked_to_global = 0; |
|
1
|
526 } |
|
195
|
527 else |
|
|
528 { |
|
|
529 symbol_def *old_def = pop_def (); |
|
|
530 count = maybe_delete (old_def); |
|
|
531 } |
|
|
532 return count; |
|
1
|
533 } |
|
|
534 |
|
|
535 void |
|
530
|
536 symbol_record::alias (symbol_record *s, int force) |
|
1
|
537 { |
|
195
|
538 sv_fcn = s->sv_fcn; |
|
|
539 |
|
530
|
540 if (force && ! s->definition) |
|
1
|
541 { |
|
195
|
542 s->definition = new symbol_def (); |
|
|
543 definition = s->definition; |
|
|
544 definition->count = 2; // Yes, this is correct. |
|
1
|
545 } |
|
530
|
546 else if (s->definition) |
|
1
|
547 { |
|
195
|
548 definition = s->definition; |
|
|
549 definition->count++; |
|
1
|
550 } |
|
|
551 } |
|
|
552 |
|
|
553 void |
|
|
554 symbol_record::mark_as_formal_parameter (void) |
|
|
555 { |
|
|
556 formal_param = 1; |
|
|
557 } |
|
|
558 |
|
|
559 int |
|
164
|
560 symbol_record::is_formal_parameter (void) const |
|
1
|
561 { |
|
|
562 return formal_param; |
|
|
563 } |
|
|
564 |
|
|
565 void |
|
195
|
566 symbol_record::mark_as_linked_to_global (void) |
|
122
|
567 { |
|
195
|
568 linked_to_global = 1; |
|
122
|
569 } |
|
|
570 |
|
|
571 int |
|
195
|
572 symbol_record::is_linked_to_global (void) const |
|
1
|
573 { |
|
195
|
574 return linked_to_global; |
|
1
|
575 } |
|
|
576 |
|
|
577 symbol_record * |
|
164
|
578 symbol_record::next (void) const |
|
1
|
579 { |
|
|
580 return next_elem; |
|
|
581 } |
|
|
582 |
|
195
|
583 void |
|
|
584 symbol_record::chain (symbol_record *s) |
|
|
585 { |
|
|
586 next_elem = s; |
|
|
587 } |
|
|
588 |
|
220
|
589 void |
|
|
590 symbol_record::push_context (void) |
|
|
591 { |
|
|
592 context.push (definition); |
|
530
|
593 definition = 0; |
|
395
|
594 |
|
|
595 global_link_context.push ((unsigned) linked_to_global); |
|
|
596 linked_to_global = 0; |
|
220
|
597 } |
|
|
598 |
|
|
599 void |
|
|
600 symbol_record::pop_context (void) |
|
|
601 { |
|
|
602 assert (! context.empty ()); |
|
|
603 |
|
|
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 (); |
|
395
|
617 linked_to_global = global_link_context.pop (); |
|
220
|
618 } |
|
|
619 |
|
195
|
620 int |
|
|
621 symbol_record::read_only_error (void) |
|
|
622 { |
|
|
623 if (is_read_only ()) |
|
|
624 { |
|
|
625 if (is_variable ()) |
|
1045
|
626 { |
|
|
627 if (user_pref.read_only_constants) |
|
|
628 { |
|
|
629 if (user_pref.read_only_constants < 0) |
|
|
630 { |
|
|
631 ::warning ("redefinition of constant `%s'", nm); |
|
|
632 return 0; |
|
|
633 } |
|
|
634 else |
|
|
635 ::error ("can't redefine read-only constant `%s'", nm); |
|
|
636 } |
|
|
637 } |
|
195
|
638 else if (is_function ()) |
|
1045
|
639 { |
|
|
640 ::error ("can't redefine read-only function `%s'", nm); |
|
|
641 } |
|
|
642 else |
|
|
643 { |
|
|
644 ::error ("can't redefine read-only symbol `%s'", nm); |
|
|
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) |
|
|
675 { |
|
|
676 init_state (); |
|
|
677 } |
|
|
678 |
|
|
679 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
|
680 { |
|
|
681 init_state (); |
|
|
682 |
|
|
683 type = sr.type (); |
|
|
684 |
|
|
685 if (sr.is_variable () && sr.is_defined ()) |
|
|
686 { |
|
|
687 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
688 tree_constant *tmp = (tree_constant *) sr.def (); |
|
620
|
689 if (tmp->is_real_scalar ()) |
|
|
690 const_type = SR_INFO_SCALAR; |
|
|
691 else if (tmp->is_complex_scalar ()) |
|
|
692 const_type = SR_INFO_COMPLEX_SCALAR; |
|
|
693 else if (tmp->is_real_matrix ()) |
|
|
694 const_type = SR_INFO_MATRIX; |
|
|
695 else if (tmp->is_complex_matrix ()) |
|
|
696 const_type = SR_INFO_COMPLEX_MATRIX; |
|
|
697 else if (tmp->is_range ()) |
|
|
698 const_type = SR_INFO_RANGE; |
|
|
699 else if (tmp->is_string ()) |
|
|
700 const_type = SR_INFO_STRING; |
|
195
|
701 |
|
|
702 nr = tmp->rows (); |
|
|
703 nc = tmp->columns (); |
|
|
704 |
|
|
705 symbol_def *sr_def = sr.definition; |
|
|
706 symbol_def *hidden_def = sr_def->next_elem; |
|
530
|
707 if (hidden_def) |
|
195
|
708 { |
|
|
709 if (hidden_def->is_user_function ()) |
|
|
710 hides = SR_INFO_USER_FUNCTION; |
|
|
711 else if (hidden_def->is_builtin_function ()) |
|
|
712 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
713 } |
|
|
714 } |
|
|
715 |
|
|
716 eternal = sr.is_eternal (); |
|
|
717 read_only = sr.is_read_only (); |
|
|
718 |
|
|
719 nm = strsave (sr.name ()); |
|
|
720 |
|
|
721 initialized = 1; |
|
|
722 } |
|
|
723 |
|
|
724 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
|
725 { |
|
|
726 type = s.type; |
|
|
727 const_type = s.const_type; |
|
|
728 hides = s.hides; |
|
|
729 eternal = s.eternal; |
|
|
730 read_only = s.read_only; |
|
|
731 nr = s.nr; |
|
|
732 nc = s.nc; |
|
|
733 nm = strsave (s.nm); |
|
|
734 initialized = s.initialized; |
|
|
735 } |
|
|
736 |
|
|
737 symbol_record_info::~symbol_record_info (void) |
|
|
738 { |
|
|
739 delete nm; |
|
|
740 } |
|
|
741 |
|
|
742 symbol_record_info& |
|
|
743 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
744 { |
|
|
745 if (this != &s) |
|
|
746 { |
|
|
747 delete nm; |
|
|
748 type = s.type; |
|
|
749 const_type = s.const_type; |
|
|
750 hides = s.hides; |
|
|
751 eternal = s.eternal; |
|
|
752 read_only = s.read_only; |
|
|
753 nr = s.nr; |
|
|
754 nc = s.nc; |
|
|
755 nm = strsave (s.nm); |
|
|
756 initialized = s.initialized; |
|
|
757 } |
|
|
758 return *this; |
|
|
759 } |
|
|
760 |
|
|
761 int |
|
|
762 symbol_record_info::is_defined (void) const |
|
|
763 { |
|
|
764 return initialized; |
|
|
765 } |
|
|
766 |
|
|
767 int |
|
|
768 symbol_record_info::is_read_only (void) const |
|
|
769 { |
|
|
770 return read_only; |
|
|
771 } |
|
|
772 |
|
|
773 int |
|
|
774 symbol_record_info::is_eternal (void) const |
|
|
775 { |
|
|
776 return eternal; |
|
|
777 } |
|
|
778 |
|
|
779 int |
|
|
780 symbol_record_info::hides_fcn (void) const |
|
|
781 { |
|
|
782 return (hides & SR_INFO_USER_FUNCTION); |
|
|
783 } |
|
|
784 |
|
|
785 int |
|
|
786 symbol_record_info::hides_builtin (void) const |
|
|
787 { |
|
|
788 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
789 } |
|
|
790 |
|
|
791 char * |
|
|
792 symbol_record_info::type_as_string (void) const |
|
|
793 { |
|
|
794 if (type == symbol_def::USER_FUNCTION) |
|
|
795 return "user function"; |
|
|
796 else if (type == symbol_def::BUILTIN_FUNCTION) |
|
|
797 return "builtin function"; |
|
|
798 else |
|
|
799 { |
|
|
800 if (const_type == SR_INFO_SCALAR) |
|
|
801 return "real scalar"; |
|
|
802 else if (const_type == SR_INFO_COMPLEX_SCALAR) |
|
|
803 return "complex scalar"; |
|
|
804 else if (const_type == SR_INFO_MATRIX) |
|
|
805 return "real matrix"; |
|
|
806 else if (const_type == SR_INFO_COMPLEX_MATRIX) |
|
|
807 return "complex matrix"; |
|
|
808 else if (const_type == SR_INFO_RANGE) |
|
|
809 return "range"; |
|
|
810 else if (const_type == SR_INFO_STRING) |
|
|
811 return "string"; |
|
|
812 else |
|
|
813 return ""; |
|
|
814 } |
|
|
815 } |
|
|
816 |
|
|
817 int |
|
|
818 symbol_record_info::is_function (void) const |
|
|
819 { |
|
|
820 return (type == symbol_def::USER_FUNCTION |
|
|
821 || type == symbol_def::BUILTIN_FUNCTION); |
|
|
822 } |
|
|
823 |
|
|
824 int |
|
|
825 symbol_record_info::rows (void) const |
|
|
826 { |
|
|
827 return nr; |
|
|
828 } |
|
|
829 |
|
|
830 int |
|
|
831 symbol_record_info::columns (void) const |
|
|
832 { |
|
|
833 return nc; |
|
|
834 } |
|
|
835 |
|
|
836 char * |
|
|
837 symbol_record_info::name (void) const |
|
|
838 { |
|
|
839 return nm; |
|
|
840 } |
|
|
841 |
|
|
842 void |
|
|
843 symbol_record_info::init_state (void) |
|
|
844 { |
|
|
845 initialized = 0; |
|
|
846 type = symbol_def::UNKNOWN; |
|
|
847 const_type = SR_INFO_UNKNOWN; |
|
|
848 hides = SR_INFO_NONE; |
|
|
849 eternal = 0; |
|
|
850 read_only = 0; |
|
|
851 nr = -1; |
|
|
852 nc = -1; |
|
530
|
853 nm = 0; |
|
195
|
854 } |
|
|
855 |
|
767
|
856 // A symbol table. |
|
1
|
857 |
|
|
858 symbol_table::symbol_table (void) |
|
|
859 { |
|
|
860 } |
|
|
861 |
|
|
862 symbol_record * |
|
530
|
863 symbol_table::lookup (const char *nm, int insert, int warn) |
|
1
|
864 { |
|
|
865 int index = hash (nm) & HASH_MASK; |
|
|
866 |
|
|
867 symbol_record *ptr = table[index].next (); |
|
|
868 |
|
530
|
869 while (ptr) |
|
1
|
870 { |
|
|
871 if (strcmp (ptr->name (), nm) == 0) |
|
|
872 return ptr; |
|
|
873 ptr = ptr->next (); |
|
|
874 } |
|
|
875 |
|
|
876 if (insert) |
|
|
877 { |
|
|
878 symbol_record *new_sym; |
|
|
879 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
880 table[index].chain (new_sym); |
|
1
|
881 return new_sym; |
|
|
882 } |
|
|
883 else if (warn) |
|
217
|
884 warning ("lookup: symbol`%s' not found", nm); |
|
1
|
885 |
|
530
|
886 return 0; |
|
1
|
887 } |
|
|
888 |
|
|
889 void |
|
572
|
890 symbol_table::rename (const char *old_name, const char *new_name) |
|
|
891 { |
|
|
892 int index = hash (old_name) & HASH_MASK; |
|
|
893 |
|
|
894 symbol_record *prev = &table[index]; |
|
|
895 symbol_record *ptr = prev->next (); |
|
|
896 |
|
|
897 while (ptr) |
|
|
898 { |
|
|
899 if (strcmp (ptr->name (), old_name) == 0) |
|
|
900 { |
|
|
901 prev->chain (ptr->next ()); |
|
|
902 |
|
|
903 index = hash (new_name) & HASH_MASK; |
|
|
904 table[index].chain (ptr); |
|
|
905 ptr->rename (new_name); |
|
|
906 |
|
|
907 return; |
|
|
908 } |
|
|
909 |
|
|
910 prev = ptr; |
|
|
911 ptr = ptr->next (); |
|
|
912 } |
|
|
913 |
|
773
|
914 error ("unable to rename `%s' to `%s', old_name, new_name"); |
|
572
|
915 } |
|
|
916 |
|
|
917 void |
|
530
|
918 symbol_table::clear (int clear_user_functions) |
|
1
|
919 { |
|
|
920 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
921 { |
|
169
|
922 symbol_record *ptr = table[i].next (); |
|
1
|
923 |
|
530
|
924 while (ptr) |
|
169
|
925 { |
|
195
|
926 if (ptr->is_user_variable () |
|
|
927 || (clear_user_functions && ptr->is_user_function ())) |
|
|
928 { |
|
|
929 ptr->clear (); |
|
|
930 } |
|
|
931 |
|
169
|
932 ptr = ptr->next (); |
|
1
|
933 } |
|
|
934 } |
|
|
935 } |
|
|
936 |
|
|
937 int |
|
530
|
938 symbol_table::clear (const char *nm, int clear_user_functions) |
|
1
|
939 { |
|
|
940 int index = hash (nm) & HASH_MASK; |
|
|
941 |
|
195
|
942 symbol_record *ptr = table[index].next (); |
|
1
|
943 |
|
530
|
944 while (ptr) |
|
1
|
945 { |
|
195
|
946 if (strcmp (ptr->name (), nm) == 0 |
|
|
947 && (ptr->is_user_variable () |
|
|
948 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
949 { |
|
195
|
950 ptr->clear (); |
|
|
951 return 1; |
|
1
|
952 } |
|
195
|
953 ptr = ptr->next (); |
|
1
|
954 } |
|
|
955 |
|
|
956 return 0; |
|
|
957 } |
|
|
958 |
|
|
959 int |
|
164
|
960 symbol_table::size (void) const |
|
1
|
961 { |
|
|
962 int count = 0; |
|
|
963 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
964 { |
|
|
965 symbol_record *ptr = table[i].next (); |
|
530
|
966 while (ptr) |
|
1
|
967 { |
|
|
968 count++; |
|
|
969 ptr = ptr->next (); |
|
|
970 } |
|
|
971 } |
|
|
972 return count; |
|
|
973 } |
|
|
974 |
|
195
|
975 static inline int |
|
|
976 pstrcmp (char **a, char **b) |
|
1
|
977 { |
|
195
|
978 return strcmp (*a, *b); |
|
1
|
979 } |
|
|
980 |
|
195
|
981 static inline int |
|
|
982 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
983 { |
|
195
|
984 return strcmp (a->name (), b->name ()); |
|
1
|
985 } |
|
|
986 |
|
867
|
987 static int |
|
|
988 matches_patterns (const char *name, char **pats, int npats) |
|
|
989 { |
|
|
990 while (npats-- > 0) |
|
|
991 { |
|
|
992 if (fnmatch (*pats, name, __FNM_FLAGS) == 0) |
|
|
993 return 1; |
|
|
994 |
|
|
995 pats++; |
|
|
996 } |
|
|
997 |
|
|
998 return 0; |
|
|
999 } |
|
|
1000 |
|
195
|
1001 // This function should probably share code with symbol_table::list. |
|
|
1002 // XXX FIXME XXX |
|
1
|
1003 |
|
195
|
1004 symbol_record_info * |
|
867
|
1005 symbol_table::long_list (int& count, char **pats, int npats, int sort, |
|
|
1006 unsigned type, unsigned scope) const |
|
1
|
1007 { |
|
115
|
1008 count = 0; |
|
1
|
1009 int n = size (); |
|
|
1010 if (n == 0) |
|
530
|
1011 return 0; |
|
1
|
1012 |
|
195
|
1013 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1014 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1015 { |
|
|
1016 symbol_record *ptr = table[i].next (); |
|
530
|
1017 while (ptr) |
|
1
|
1018 { |
|
|
1019 assert (count < n); |
|
867
|
1020 |
|
195
|
1021 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
1022 |
|
195
|
1023 unsigned my_type = ptr->type (); |
|
867
|
1024 |
|
|
1025 char *my_name = ptr->name (); |
|
|
1026 |
|
|
1027 if ((type & my_type) && (scope & my_scope) |
|
|
1028 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
|
1029 symbols[count++] = symbol_record_info (*ptr); |
|
|
1030 |
|
1
|
1031 ptr = ptr->next (); |
|
|
1032 } |
|
|
1033 } |
|
195
|
1034 symbols[count] = symbol_record_info (); |
|
|
1035 |
|
530
|
1036 if (sort && symbols) |
|
195
|
1037 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
530
|
1038 (int (*)(const void*, const void*)) symbol_record_info_cmp); |
|
195
|
1039 |
|
1
|
1040 return symbols; |
|
|
1041 } |
|
|
1042 |
|
|
1043 char ** |
|
867
|
1044 symbol_table::list (int& count, char **pats, int npats, int sort, |
|
|
1045 unsigned type, unsigned scope) const |
|
1
|
1046 { |
|
115
|
1047 count = 0; |
|
1
|
1048 int n = size (); |
|
|
1049 if (n == 0) |
|
530
|
1050 return 0; |
|
1
|
1051 |
|
|
1052 char **symbols = new char * [n+1]; |
|
|
1053 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1054 { |
|
|
1055 symbol_record *ptr = table[i].next (); |
|
530
|
1056 while (ptr) |
|
1
|
1057 { |
|
|
1058 assert (count < n); |
|
605
|
1059 |
|
195
|
1060 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1061 |
|
195
|
1062 unsigned my_type = ptr->type (); |
|
605
|
1063 |
|
867
|
1064 char *my_name = ptr->name (); |
|
|
1065 |
|
|
1066 if ((type & my_type) && (scope & my_scope) |
|
|
1067 && (npats == 0 || matches_patterns (my_name, pats, npats))) |
|
1
|
1068 symbols[count++] = strsave (ptr->name ()); |
|
605
|
1069 |
|
1
|
1070 ptr = ptr->next (); |
|
|
1071 } |
|
|
1072 } |
|
530
|
1073 symbols[count] = 0; |
|
1
|
1074 |
|
530
|
1075 if (sort && symbols) |
|
1
|
1076 qsort ((void **) symbols, count, sizeof (char *), |
|
530
|
1077 (int (*)(const void*, const void*)) pstrcmp); |
|
1
|
1078 |
|
|
1079 return symbols; |
|
|
1080 } |
|
|
1081 |
|
605
|
1082 symbol_record ** |
|
|
1083 symbol_table::glob (int& count, char *pat, unsigned type, |
|
|
1084 unsigned scope) const |
|
|
1085 { |
|
|
1086 count = 0; |
|
|
1087 int n = size (); |
|
|
1088 if (n == 0) |
|
|
1089 return 0; |
|
|
1090 |
|
|
1091 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1092 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1093 { |
|
|
1094 symbol_record *ptr = table[i].next (); |
|
|
1095 while (ptr) |
|
|
1096 { |
|
|
1097 assert (count < n); |
|
|
1098 |
|
|
1099 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1100 |
|
|
1101 unsigned my_type = ptr->type (); |
|
|
1102 |
|
|
1103 if ((type & my_type) && (scope & my_scope) |
|
|
1104 && fnmatch (pat, ptr->name (), __FNM_FLAGS) == 0) |
|
|
1105 { |
|
|
1106 symbols[count++] = ptr; |
|
|
1107 } |
|
|
1108 |
|
|
1109 ptr = ptr->next (); |
|
|
1110 } |
|
|
1111 } |
|
|
1112 symbols[count] = 0; |
|
|
1113 |
|
|
1114 return symbols; |
|
|
1115 } |
|
|
1116 |
|
220
|
1117 void |
|
|
1118 symbol_table::push_context (void) |
|
|
1119 { |
|
|
1120 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1121 { |
|
|
1122 symbol_record *ptr = table[i].next (); |
|
|
1123 |
|
530
|
1124 while (ptr) |
|
220
|
1125 { |
|
|
1126 ptr->push_context (); |
|
|
1127 ptr = ptr->next (); |
|
|
1128 } |
|
|
1129 } |
|
|
1130 } |
|
|
1131 |
|
|
1132 void |
|
|
1133 symbol_table::pop_context (void) |
|
|
1134 { |
|
|
1135 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1136 { |
|
|
1137 symbol_record *ptr = table[i].next (); |
|
|
1138 |
|
530
|
1139 while (ptr) |
|
220
|
1140 { |
|
|
1141 ptr->pop_context (); |
|
|
1142 ptr = ptr->next (); |
|
|
1143 } |
|
|
1144 } |
|
|
1145 } |
|
|
1146 |
|
1
|
1147 // Chris Torek's fave hash function. |
|
|
1148 |
|
|
1149 unsigned int |
|
|
1150 symbol_table::hash (const char *str) |
|
|
1151 { |
|
|
1152 unsigned h = 0; |
|
|
1153 while (*str) |
|
|
1154 h = h * 33 + *str++; |
|
|
1155 return h; |
|
|
1156 } |
|
|
1157 |
|
|
1158 /* |
|
|
1159 ;;; Local Variables: *** |
|
|
1160 ;;; mode: C++ *** |
|
|
1161 ;;; page-delimiter: "^/\\*" *** |
|
|
1162 ;;; End: *** |
|
|
1163 */ |
