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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 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 #if defined (__GNUG__) |
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29 #pragma implementation |
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30 #endif |
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31 |
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32 #include "symtab.h" |
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33 #include "error.h" |
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34 #include "variables.h" |
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35 #include "utils.h" |
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36 #include "tree-base.h" |
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37 #include "tree-expr.h" |
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38 #include "tree-const.h" |
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39 |
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40 extern "C" |
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41 { |
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42 #include "fnmatch.h" |
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43 } |
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44 |
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45 /* |
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46 * Variables and functions. |
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47 */ |
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48 symbol_def::symbol_def (void) |
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49 { |
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195
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50 init_state (); |
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51 } |
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52 |
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53 symbol_def::symbol_def (tree_constant *t) |
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54 { |
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195
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55 init_state (); |
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56 definition = t; |
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57 type = USER_VARIABLE; |
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58 } |
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59 |
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60 symbol_def::symbol_def (tree_builtin *t, unsigned fcn_type) |
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61 { |
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62 init_state (); |
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63 definition = t; |
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64 type = BUILTIN_FUNCTION | fcn_type; |
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65 } |
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66 |
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67 symbol_def::symbol_def (tree_function *t, unsigned fcn_type) |
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68 { |
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69 init_state (); |
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70 definition = t; |
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71 type = USER_FUNCTION | fcn_type; |
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195
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72 } |
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73 |
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74 void |
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75 symbol_def::init_state (void) |
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76 { |
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77 type = UNKNOWN; |
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78 eternal = 0; |
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79 read_only = 0; |
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80 |
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81 help_string = 0; |
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82 definition = 0; |
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83 next_elem = 0; |
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195
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84 count = 0; |
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85 } |
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86 |
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87 symbol_def::~symbol_def (void) |
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88 { |
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89 delete [] help_string; |
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90 delete definition; |
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91 } |
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92 |
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195
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93 int |
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94 symbol_def::is_variable (void) const |
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95 { |
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96 return (type & USER_VARIABLE || type & BUILTIN_VARIABLE); |
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195
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97 } |
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98 |
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99 int |
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100 symbol_def::is_function (void) const |
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101 { |
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102 return (type & USER_FUNCTION || type & BUILTIN_FUNCTION); |
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195
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103 } |
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104 |
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105 int |
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106 symbol_def::is_user_variable (void) const |
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107 { |
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108 return (type & USER_VARIABLE); |
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109 } |
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110 |
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111 int |
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112 symbol_def::is_text_function (void) const |
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113 { |
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114 return (type & TEXT_FUNCTION); |
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115 } |
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116 |
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117 int |
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118 symbol_def::is_mapper_function (void) const |
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119 { |
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120 return (type & MAPPER_FUNCTION); |
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195
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121 } |
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122 |
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123 int |
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124 symbol_def::is_user_function (void) const |
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125 { |
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126 return (type & USER_FUNCTION); |
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195
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127 } |
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128 |
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129 int |
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130 symbol_def::is_builtin_variable (void) const |
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131 { |
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132 return (type & BUILTIN_VARIABLE); |
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195
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133 } |
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134 |
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135 int |
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136 symbol_def::is_builtin_function (void) const |
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137 { |
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138 return (type & BUILTIN_FUNCTION); |
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195
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139 } |
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140 |
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141 void |
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142 symbol_def::define (tree_constant *t) |
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143 { |
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144 definition = t; |
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195
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145 if (! is_builtin_variable ()) |
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146 type = USER_VARIABLE; |
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147 } |
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148 |
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149 void |
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150 symbol_def::define (tree_builtin *t, unsigned fcn_type) |
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151 { |
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152 definition = t; |
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153 type = BUILTIN_FUNCTION | fcn_type; |
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154 } |
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155 |
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156 void |
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157 symbol_def::define (tree_function *t, unsigned fcn_type) |
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158 { |
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159 definition = t; |
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160 type = USER_FUNCTION | fcn_type; |
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195
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161 } |
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162 |
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163 void |
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164 symbol_def::protect (void) |
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165 { |
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166 read_only = 1; |
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167 } |
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168 |
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169 void |
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170 symbol_def::unprotect (void) |
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171 { |
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172 read_only = 0; |
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173 |
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174 } |
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175 |
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176 void |
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177 symbol_def::make_eternal (void) |
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178 { |
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179 eternal = 1; |
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180 } |
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181 |
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182 tree_fvc * |
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164
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183 symbol_def::def (void) const |
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184 { |
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185 return definition; |
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186 } |
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187 |
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188 char * |
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189 symbol_def::help (void) const |
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190 { |
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191 return help_string; |
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192 } |
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193 |
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194 void |
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164
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195 symbol_def::document (const char *h) |
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196 { |
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197 delete [] help_string; |
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198 help_string = strsave (h); |
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199 } |
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200 |
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201 int |
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195
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202 maybe_delete (symbol_def *def) |
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203 { |
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204 int count = 0; |
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205 if (def && def->count > 0) |
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195
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206 { |
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207 def->count--; |
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208 count = def->count; |
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209 if (def->count == 0) |
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210 delete def; |
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195
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211 } |
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212 return count; |
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213 } |
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214 |
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215 /* |
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216 * Individual records in a symbol table. |
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217 */ |
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218 symbol_record::symbol_record (void) |
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219 { |
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195
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220 init_state (); |
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221 } |
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222 |
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223 symbol_record::symbol_record (const char *n, symbol_record *nxt) |
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224 { |
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195
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225 init_state (); |
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226 nm = strsave (n); |
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227 next_elem = nxt; |
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228 } |
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229 |
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195
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230 void |
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231 symbol_record::init_state (void) |
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232 { |
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233 formal_param = 0; |
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234 linked_to_global = 0; |
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235 nm = 0; |
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236 sv_fcn = 0; |
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237 definition = 0; |
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238 next_elem = 0; |
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239 } |
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240 |
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241 symbol_record::~symbol_record (void) |
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242 { |
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243 delete [] nm; |
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244 } |
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245 |
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246 char * |
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247 symbol_record::name (void) const |
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248 { |
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249 return nm; |
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250 } |
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251 |
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252 char * |
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253 symbol_record::help (void) const |
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254 { |
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255 return definition ? definition->help () : 0; |
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256 } |
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257 |
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489
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258 tree_fvc * |
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259 symbol_record::def (void) const |
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260 { |
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261 return definition ? definition->def () : 0; |
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262 } |
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263 |
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572
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264 void |
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265 symbol_record::rename (const char *new_name) |
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266 { |
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267 delete [] nm; |
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268 nm = strsave (new_name); |
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269 } |
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270 |
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271 int |
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272 symbol_record::is_function (void) const |
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273 { |
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274 return definition ? definition->is_function () : 0; |
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275 } |
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276 |
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277 int |
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278 symbol_record::is_text_function (void) const |
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279 { |
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280 return definition ? definition->is_text_function () : 0; |
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281 } |
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282 |
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283 int |
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284 symbol_record::is_mapper_function (void) const |
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285 { |
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286 return definition ? definition->is_mapper_function () : 0; |
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287 } |
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288 |
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289 int |
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290 symbol_record::is_user_function (void) const |
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291 { |
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292 return definition ? definition->is_user_function () : 0; |
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195
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293 } |
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294 |
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295 int |
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296 symbol_record::is_builtin_function (void) const |
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297 { |
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298 return definition ? definition->is_builtin_function () : 0; |
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299 } |
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300 |
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301 int |
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302 symbol_record::is_variable (void) const |
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303 { |
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304 return definition ? definition->is_variable () : 0; |
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305 } |
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306 |
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307 int |
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308 symbol_record::is_user_variable (void) const |
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309 { |
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310 return definition ? definition->is_user_variable () : 0; |
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311 } |
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312 |
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313 int |
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314 symbol_record::is_builtin_variable (void) const |
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315 { |
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316 return definition ? definition->is_builtin_variable () : 0; |
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195
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317 } |
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318 |
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319 unsigned |
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320 symbol_record::type (void) const |
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321 { |
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322 return definition ? definition->type : 0; |
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323 } |
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324 |
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325 int |
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164
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326 symbol_record::is_defined (void) const |
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327 { |
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328 return definition ? (definition->def () != 0) : 0; |
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329 } |
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330 |
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331 int |
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332 symbol_record::is_read_only (void) const |
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333 { |
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334 return definition ? definition->read_only : 0; |
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335 } |
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336 |
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337 int |
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338 symbol_record::is_eternal (void) const |
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339 { |
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340 return definition ? definition->eternal : 0; |
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195
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341 } |
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342 |
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343 void |
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344 symbol_record::protect (void) |
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345 { |
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346 if (definition) |
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195
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347 { |
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348 definition->protect (); |
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349 |
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350 if (! is_defined ()) |
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351 warning ("protecting undefined variable `%s'", nm); |
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352 } |
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353 } |
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354 |
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355 void |
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356 symbol_record::unprotect (void) |
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357 { |
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358 if (definition) |
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195
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359 definition->unprotect (); |
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360 } |
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361 |
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362 void |
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363 symbol_record::make_eternal (void) |
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364 { |
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365 if (definition) |
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195
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366 { |
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367 definition->make_eternal (); |
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368 |
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369 if (! is_defined ()) |
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370 warning ("giving eternal life to undefined variable `%s'", nm); |
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371 } |
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372 } |
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373 |
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374 void |
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375 symbol_record::set_sv_function (sv_Function f) |
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376 { |
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377 sv_fcn = f; |
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378 } |
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379 |
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380 int |
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381 symbol_record::define (tree_constant *t) |
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382 { |
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195
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383 if (is_variable () && read_only_error ()) |
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384 return 0; |
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385 |
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386 tree_fvc *saved_def = 0; |
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387 if (! definition) |
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195
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388 { |
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389 definition = new symbol_def (); |
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390 definition->count = 1; |
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391 } |
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392 else if (is_function ()) |
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393 { |
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195
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394 symbol_def *new_def = new symbol_def (); |
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395 push_def (new_def); |
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396 definition->count = 1; |
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397 } |
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195
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398 else if (is_variable ()) |
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399 { |
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195
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400 saved_def = definition->def (); |
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401 } |
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402 |
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195
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403 definition->define (t); |
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404 |
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405 if (sv_fcn && sv_fcn () < 0) |
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406 { |
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195
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407 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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408 definition->define ((tree_constant *) saved_def); |
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409 delete t; |
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410 return 0; |
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411 } |
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412 |
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413 delete saved_def; |
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414 |
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415 return 1; |
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416 } |
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417 |
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418 int |
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530
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419 symbol_record::define (tree_builtin *t, int text_fcn) |
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420 { |
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195
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421 if (read_only_error ()) |
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422 return 0; |
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423 |
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195
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424 if (is_variable ()) |
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1
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425 { |
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195
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426 symbol_def *old_def = pop_def (); |
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427 maybe_delete (old_def); |
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1
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428 } |
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429 |
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195
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430 if (is_function ()) |
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1
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431 { |
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195
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432 symbol_def *old_def = pop_def (); |
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433 maybe_delete (old_def); |
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1
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434 } |
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435 |
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530
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436 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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437 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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438 : symbol_def::UNKNOWN); |
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439 |
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440 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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441 push_def (new_def); |
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442 definition->count = 1; |
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443 |
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1
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444 return 1; |
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445 } |
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446 |
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447 int |
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530
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448 symbol_record::define (tree_function *t, int text_fcn) |
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1
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449 { |
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195
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450 if (read_only_error ()) |
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1
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451 return 0; |
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452 |
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195
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453 if (is_variable ()) |
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1
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454 { |
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195
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455 symbol_def *old_def = pop_def (); |
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456 maybe_delete (old_def); |
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1
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457 } |
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458 |
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195
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459 if (is_function ()) |
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1
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460 { |
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195
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461 symbol_def *old_def = pop_def (); |
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462 maybe_delete (old_def); |
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1
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463 } |
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464 |
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530
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465 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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466 : symbol_def::UNKNOWN; |
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467 |
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468 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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469 push_def (new_def); |
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470 definition->count = 1; |
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471 |
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1
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472 return 1; |
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473 } |
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474 |
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475 int |
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476 symbol_record::define_as_fcn (tree_constant *t) |
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477 { |
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195
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478 if (is_variable () && read_only_error ()) |
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1
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479 return 0; |
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480 |
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195
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481 if (is_variable ()) |
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1
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482 { |
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195
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483 symbol_def *old_def = pop_def (); |
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484 maybe_delete (old_def); |
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485 } |
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486 |
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487 if (is_function ()) |
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488 { |
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489 symbol_def *old_def = pop_def (); |
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490 maybe_delete (old_def); |
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1
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491 } |
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492 |
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195
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493 symbol_def *new_def = new symbol_def (t); |
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494 push_def (new_def); |
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495 definition->count = 1; |
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496 definition->type = symbol_def::BUILTIN_FUNCTION; |
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1
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497 |
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498 return 1; |
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499 } |
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500 |
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195
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501 int |
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502 symbol_record::define_builtin_var (tree_constant *t) |
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503 { |
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504 define (t); |
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505 if (is_variable ()) |
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506 definition->type = symbol_def::BUILTIN_VARIABLE; |
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530
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507 return 1; |
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195
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508 } |
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509 |
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1
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510 void |
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164
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511 symbol_record::document (const char *h) |
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1
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512 { |
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530
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513 if (definition) |
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195
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514 { |
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515 definition->document (h); |
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1
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516 |
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195
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517 if (! is_defined ()) |
|
|
518 warning ("documenting undefined variable `%s'", nm); |
|
|
519 } |
|
1
|
520 } |
|
|
521 |
|
|
522 int |
|
195
|
523 symbol_record::clear (void) |
|
1
|
524 { |
|
195
|
525 int count = 0; |
|
|
526 if (linked_to_global) |
|
1
|
527 { |
|
195
|
528 count = maybe_delete (definition); |
|
530
|
529 definition = 0; |
|
195
|
530 linked_to_global = 0; |
|
1
|
531 } |
|
195
|
532 else |
|
|
533 { |
|
|
534 symbol_def *old_def = pop_def (); |
|
|
535 count = maybe_delete (old_def); |
|
|
536 } |
|
|
537 return count; |
|
1
|
538 } |
|
|
539 |
|
|
540 void |
|
530
|
541 symbol_record::alias (symbol_record *s, int force) |
|
1
|
542 { |
|
195
|
543 sv_fcn = s->sv_fcn; |
|
|
544 |
|
530
|
545 if (force && ! s->definition) |
|
1
|
546 { |
|
195
|
547 s->definition = new symbol_def (); |
|
|
548 definition = s->definition; |
|
|
549 definition->count = 2; // Yes, this is correct. |
|
1
|
550 } |
|
530
|
551 else if (s->definition) |
|
1
|
552 { |
|
195
|
553 definition = s->definition; |
|
|
554 definition->count++; |
|
1
|
555 } |
|
|
556 } |
|
|
557 |
|
|
558 void |
|
|
559 symbol_record::mark_as_formal_parameter (void) |
|
|
560 { |
|
|
561 formal_param = 1; |
|
|
562 } |
|
|
563 |
|
|
564 int |
|
164
|
565 symbol_record::is_formal_parameter (void) const |
|
1
|
566 { |
|
|
567 return formal_param; |
|
|
568 } |
|
|
569 |
|
|
570 void |
|
195
|
571 symbol_record::mark_as_linked_to_global (void) |
|
122
|
572 { |
|
195
|
573 linked_to_global = 1; |
|
122
|
574 } |
|
|
575 |
|
|
576 int |
|
195
|
577 symbol_record::is_linked_to_global (void) const |
|
1
|
578 { |
|
195
|
579 return linked_to_global; |
|
1
|
580 } |
|
|
581 |
|
|
582 symbol_record * |
|
164
|
583 symbol_record::next (void) const |
|
1
|
584 { |
|
|
585 return next_elem; |
|
|
586 } |
|
|
587 |
|
195
|
588 void |
|
|
589 symbol_record::chain (symbol_record *s) |
|
|
590 { |
|
|
591 next_elem = s; |
|
|
592 } |
|
|
593 |
|
220
|
594 void |
|
|
595 symbol_record::push_context (void) |
|
|
596 { |
|
|
597 context.push (definition); |
|
530
|
598 definition = 0; |
|
395
|
599 |
|
|
600 global_link_context.push ((unsigned) linked_to_global); |
|
|
601 linked_to_global = 0; |
|
220
|
602 } |
|
|
603 |
|
|
604 void |
|
|
605 symbol_record::pop_context (void) |
|
|
606 { |
|
|
607 assert (! context.empty ()); |
|
|
608 |
|
|
609 if (is_variable ()) |
|
|
610 { |
|
|
611 symbol_def *old_def = pop_def (); |
|
|
612 maybe_delete (old_def); |
|
|
613 } |
|
|
614 |
|
|
615 if (is_function ()) |
|
|
616 { |
|
|
617 symbol_def *old_def = pop_def (); |
|
|
618 maybe_delete (old_def); |
|
|
619 } |
|
|
620 |
|
|
621 definition = context.pop (); |
|
395
|
622 linked_to_global = global_link_context.pop (); |
|
220
|
623 } |
|
|
624 |
|
195
|
625 int |
|
|
626 symbol_record::read_only_error (void) |
|
|
627 { |
|
|
628 if (is_read_only ()) |
|
|
629 { |
|
|
630 char *tag = "symbol"; |
|
|
631 if (is_variable ()) |
|
|
632 tag = "variable"; |
|
|
633 else if (is_function ()) |
|
|
634 tag = "function"; |
|
|
635 |
|
240
|
636 ::error ("can't redefined read-only %s `%s'", tag, nm); |
|
195
|
637 |
|
|
638 return 1; |
|
|
639 } |
|
|
640 else |
|
|
641 return 0; |
|
|
642 } |
|
|
643 |
|
|
644 void |
|
|
645 symbol_record::push_def (symbol_def *sd) |
|
|
646 { |
|
530
|
647 if (! sd) |
|
195
|
648 return; |
|
|
649 |
|
|
650 sd->next_elem = definition; |
|
|
651 definition = sd; |
|
|
652 } |
|
|
653 |
|
|
654 symbol_def * |
|
|
655 symbol_record::pop_def (void) |
|
|
656 { |
|
|
657 symbol_def *top = definition; |
|
530
|
658 if (definition) |
|
195
|
659 definition = definition->next_elem; |
|
|
660 return top; |
|
|
661 } |
|
|
662 |
|
|
663 /* |
|
|
664 * A structure for handling verbose information about a symbol_record. |
|
|
665 */ |
|
|
666 |
|
|
667 symbol_record_info::symbol_record_info (void) |
|
|
668 { |
|
|
669 init_state (); |
|
|
670 } |
|
|
671 |
|
|
672 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
|
673 { |
|
|
674 init_state (); |
|
|
675 |
|
|
676 type = sr.type (); |
|
|
677 |
|
|
678 if (sr.is_variable () && sr.is_defined ()) |
|
|
679 { |
|
|
680 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
681 tree_constant *tmp = (tree_constant *) sr.def (); |
|
|
682 switch (tmp->const_type ()) |
|
|
683 { |
|
|
684 case tree_constant_rep::scalar_constant: |
|
|
685 const_type = SR_INFO_SCALAR; |
|
|
686 break; |
|
|
687 case tree_constant_rep::complex_scalar_constant: |
|
|
688 const_type = SR_INFO_COMPLEX_SCALAR; |
|
|
689 break; |
|
|
690 case tree_constant_rep::matrix_constant: |
|
|
691 const_type = SR_INFO_MATRIX; |
|
|
692 break; |
|
|
693 case tree_constant_rep::complex_matrix_constant: |
|
|
694 const_type = SR_INFO_COMPLEX_MATRIX; |
|
|
695 break; |
|
|
696 case tree_constant_rep::range_constant: |
|
|
697 const_type = SR_INFO_RANGE; |
|
|
698 break; |
|
|
699 case tree_constant_rep::string_constant: |
|
|
700 const_type = SR_INFO_STRING; |
|
|
701 break; |
|
|
702 default: |
|
|
703 break; |
|
|
704 } |
|
|
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 |
|
|
723 nm = strsave (sr.name ()); |
|
|
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; |
|
|
737 nm = strsave (s.nm); |
|
|
738 initialized = s.initialized; |
|
|
739 } |
|
|
740 |
|
|
741 symbol_record_info::~symbol_record_info (void) |
|
|
742 { |
|
|
743 delete nm; |
|
|
744 } |
|
|
745 |
|
|
746 symbol_record_info& |
|
|
747 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
748 { |
|
|
749 if (this != &s) |
|
|
750 { |
|
|
751 delete nm; |
|
|
752 type = s.type; |
|
|
753 const_type = s.const_type; |
|
|
754 hides = s.hides; |
|
|
755 eternal = s.eternal; |
|
|
756 read_only = s.read_only; |
|
|
757 nr = s.nr; |
|
|
758 nc = s.nc; |
|
|
759 nm = strsave (s.nm); |
|
|
760 initialized = s.initialized; |
|
|
761 } |
|
|
762 return *this; |
|
|
763 } |
|
|
764 |
|
|
765 int |
|
|
766 symbol_record_info::is_defined (void) const |
|
|
767 { |
|
|
768 return initialized; |
|
|
769 } |
|
|
770 |
|
|
771 int |
|
|
772 symbol_record_info::is_read_only (void) const |
|
|
773 { |
|
|
774 return read_only; |
|
|
775 } |
|
|
776 |
|
|
777 int |
|
|
778 symbol_record_info::is_eternal (void) const |
|
|
779 { |
|
|
780 return eternal; |
|
|
781 } |
|
|
782 |
|
|
783 int |
|
|
784 symbol_record_info::hides_fcn (void) const |
|
|
785 { |
|
|
786 return (hides & SR_INFO_USER_FUNCTION); |
|
|
787 } |
|
|
788 |
|
|
789 int |
|
|
790 symbol_record_info::hides_builtin (void) const |
|
|
791 { |
|
|
792 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
793 } |
|
|
794 |
|
|
795 char * |
|
|
796 symbol_record_info::type_as_string (void) const |
|
|
797 { |
|
|
798 if (type == symbol_def::USER_FUNCTION) |
|
|
799 return "user function"; |
|
|
800 else if (type == symbol_def::BUILTIN_FUNCTION) |
|
|
801 return "builtin function"; |
|
|
802 else |
|
|
803 { |
|
|
804 if (const_type == SR_INFO_SCALAR) |
|
|
805 return "real scalar"; |
|
|
806 else if (const_type == SR_INFO_COMPLEX_SCALAR) |
|
|
807 return "complex scalar"; |
|
|
808 else if (const_type == SR_INFO_MATRIX) |
|
|
809 return "real matrix"; |
|
|
810 else if (const_type == SR_INFO_COMPLEX_MATRIX) |
|
|
811 return "complex matrix"; |
|
|
812 else if (const_type == SR_INFO_RANGE) |
|
|
813 return "range"; |
|
|
814 else if (const_type == SR_INFO_STRING) |
|
|
815 return "string"; |
|
|
816 else |
|
|
817 return ""; |
|
|
818 } |
|
|
819 } |
|
|
820 |
|
|
821 int |
|
|
822 symbol_record_info::is_function (void) const |
|
|
823 { |
|
|
824 return (type == symbol_def::USER_FUNCTION |
|
|
825 || type == symbol_def::BUILTIN_FUNCTION); |
|
|
826 } |
|
|
827 |
|
|
828 int |
|
|
829 symbol_record_info::rows (void) const |
|
|
830 { |
|
|
831 return nr; |
|
|
832 } |
|
|
833 |
|
|
834 int |
|
|
835 symbol_record_info::columns (void) const |
|
|
836 { |
|
|
837 return nc; |
|
|
838 } |
|
|
839 |
|
|
840 char * |
|
|
841 symbol_record_info::name (void) const |
|
|
842 { |
|
|
843 return nm; |
|
|
844 } |
|
|
845 |
|
|
846 void |
|
|
847 symbol_record_info::init_state (void) |
|
|
848 { |
|
|
849 initialized = 0; |
|
|
850 type = symbol_def::UNKNOWN; |
|
|
851 const_type = SR_INFO_UNKNOWN; |
|
|
852 hides = SR_INFO_NONE; |
|
|
853 eternal = 0; |
|
|
854 read_only = 0; |
|
|
855 nr = -1; |
|
|
856 nc = -1; |
|
530
|
857 nm = 0; |
|
195
|
858 } |
|
|
859 |
|
1
|
860 /* |
|
|
861 * A symbol table. |
|
|
862 */ |
|
|
863 |
|
|
864 symbol_table::symbol_table (void) |
|
|
865 { |
|
|
866 } |
|
|
867 |
|
|
868 symbol_record * |
|
530
|
869 symbol_table::lookup (const char *nm, int insert, int warn) |
|
1
|
870 { |
|
|
871 int index = hash (nm) & HASH_MASK; |
|
|
872 |
|
|
873 symbol_record *ptr = table[index].next (); |
|
|
874 |
|
530
|
875 while (ptr) |
|
1
|
876 { |
|
|
877 if (strcmp (ptr->name (), nm) == 0) |
|
|
878 return ptr; |
|
|
879 ptr = ptr->next (); |
|
|
880 } |
|
|
881 |
|
|
882 if (insert) |
|
|
883 { |
|
|
884 symbol_record *new_sym; |
|
|
885 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
886 table[index].chain (new_sym); |
|
1
|
887 return new_sym; |
|
|
888 } |
|
|
889 else if (warn) |
|
217
|
890 warning ("lookup: symbol`%s' not found", nm); |
|
1
|
891 |
|
530
|
892 return 0; |
|
1
|
893 } |
|
|
894 |
|
|
895 void |
|
572
|
896 symbol_table::rename (const char *old_name, const char *new_name) |
|
|
897 { |
|
|
898 int index = hash (old_name) & HASH_MASK; |
|
|
899 |
|
|
900 symbol_record *prev = &table[index]; |
|
|
901 symbol_record *ptr = prev->next (); |
|
|
902 |
|
|
903 while (ptr) |
|
|
904 { |
|
|
905 if (strcmp (ptr->name (), old_name) == 0) |
|
|
906 { |
|
|
907 prev->chain (ptr->next ()); |
|
|
908 |
|
|
909 index = hash (new_name) & HASH_MASK; |
|
|
910 table[index].chain (ptr); |
|
|
911 ptr->rename (new_name); |
|
|
912 |
|
|
913 return; |
|
|
914 } |
|
|
915 |
|
|
916 prev = ptr; |
|
|
917 ptr = ptr->next (); |
|
|
918 } |
|
|
919 |
|
|
920 panic_impossible (); |
|
|
921 } |
|
|
922 |
|
|
923 void |
|
530
|
924 symbol_table::clear (int clear_user_functions) |
|
1
|
925 { |
|
|
926 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
927 { |
|
169
|
928 symbol_record *ptr = table[i].next (); |
|
1
|
929 |
|
530
|
930 while (ptr) |
|
169
|
931 { |
|
195
|
932 if (ptr->is_user_variable () |
|
|
933 || (clear_user_functions && ptr->is_user_function ())) |
|
|
934 { |
|
|
935 ptr->clear (); |
|
|
936 } |
|
|
937 |
|
169
|
938 ptr = ptr->next (); |
|
1
|
939 } |
|
|
940 } |
|
|
941 } |
|
|
942 |
|
|
943 int |
|
530
|
944 symbol_table::clear (const char *nm, int clear_user_functions) |
|
1
|
945 { |
|
|
946 int index = hash (nm) & HASH_MASK; |
|
|
947 |
|
195
|
948 symbol_record *ptr = table[index].next (); |
|
1
|
949 |
|
530
|
950 while (ptr) |
|
1
|
951 { |
|
195
|
952 if (strcmp (ptr->name (), nm) == 0 |
|
|
953 && (ptr->is_user_variable () |
|
|
954 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
955 { |
|
195
|
956 ptr->clear (); |
|
|
957 return 1; |
|
1
|
958 } |
|
195
|
959 ptr = ptr->next (); |
|
1
|
960 } |
|
|
961 |
|
|
962 return 0; |
|
|
963 } |
|
|
964 |
|
|
965 int |
|
164
|
966 symbol_table::size (void) const |
|
1
|
967 { |
|
|
968 int count = 0; |
|
|
969 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
970 { |
|
|
971 symbol_record *ptr = table[i].next (); |
|
530
|
972 while (ptr) |
|
1
|
973 { |
|
|
974 count++; |
|
|
975 ptr = ptr->next (); |
|
|
976 } |
|
|
977 } |
|
|
978 return count; |
|
|
979 } |
|
|
980 |
|
195
|
981 static inline int |
|
|
982 pstrcmp (char **a, char **b) |
|
1
|
983 { |
|
195
|
984 return strcmp (*a, *b); |
|
1
|
985 } |
|
|
986 |
|
195
|
987 static inline int |
|
|
988 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
989 { |
|
195
|
990 return strcmp (a->name (), b->name ()); |
|
1
|
991 } |
|
|
992 |
|
195
|
993 // This function should probably share code with symbol_table::list. |
|
|
994 // XXX FIXME XXX |
|
1
|
995 |
|
195
|
996 symbol_record_info * |
|
530
|
997 symbol_table::long_list (int& count, int sort, unsigned type, |
|
|
998 unsigned scope) const |
|
1
|
999 { |
|
115
|
1000 count = 0; |
|
1
|
1001 int n = size (); |
|
|
1002 if (n == 0) |
|
530
|
1003 return 0; |
|
1
|
1004 |
|
195
|
1005 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1006 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1007 { |
|
|
1008 symbol_record *ptr = table[i].next (); |
|
530
|
1009 while (ptr) |
|
1
|
1010 { |
|
|
1011 assert (count < n); |
|
195
|
1012 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1013 unsigned my_type = ptr->type (); |
|
|
1014 if ((type & my_type) && (scope & my_scope)) |
|
|
1015 { |
|
|
1016 symbols[count++] = symbol_record_info (*ptr); |
|
|
1017 } |
|
1
|
1018 ptr = ptr->next (); |
|
|
1019 } |
|
|
1020 } |
|
195
|
1021 symbols[count] = symbol_record_info (); |
|
|
1022 |
|
530
|
1023 if (sort && symbols) |
|
195
|
1024 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
530
|
1025 (int (*)(const void*, const void*)) symbol_record_info_cmp); |
|
195
|
1026 |
|
1
|
1027 return symbols; |
|
|
1028 } |
|
|
1029 |
|
|
1030 char ** |
|
530
|
1031 symbol_table::list (int& count, int sort, unsigned type, |
|
|
1032 unsigned scope) const |
|
1
|
1033 { |
|
115
|
1034 count = 0; |
|
1
|
1035 int n = size (); |
|
|
1036 if (n == 0) |
|
530
|
1037 return 0; |
|
1
|
1038 |
|
|
1039 char **symbols = new char * [n+1]; |
|
|
1040 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1041 { |
|
|
1042 symbol_record *ptr = table[i].next (); |
|
530
|
1043 while (ptr) |
|
1
|
1044 { |
|
|
1045 assert (count < n); |
|
605
|
1046 |
|
195
|
1047 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
1048 |
|
195
|
1049 unsigned my_type = ptr->type (); |
|
605
|
1050 |
|
195
|
1051 if ((type & my_type) && (scope & my_scope)) |
|
1
|
1052 symbols[count++] = strsave (ptr->name ()); |
|
605
|
1053 |
|
1
|
1054 ptr = ptr->next (); |
|
|
1055 } |
|
|
1056 } |
|
530
|
1057 symbols[count] = 0; |
|
1
|
1058 |
|
530
|
1059 if (sort && symbols) |
|
1
|
1060 qsort ((void **) symbols, count, sizeof (char *), |
|
530
|
1061 (int (*)(const void*, const void*)) pstrcmp); |
|
1
|
1062 |
|
|
1063 return symbols; |
|
|
1064 } |
|
|
1065 |
|
605
|
1066 symbol_record ** |
|
|
1067 symbol_table::glob (int& count, char *pat, unsigned type, |
|
|
1068 unsigned scope) const |
|
|
1069 { |
|
|
1070 count = 0; |
|
|
1071 int n = size (); |
|
|
1072 if (n == 0) |
|
|
1073 return 0; |
|
|
1074 |
|
|
1075 symbol_record **symbols = new symbol_record * [n+1]; |
|
|
1076 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1077 { |
|
|
1078 symbol_record *ptr = table[i].next (); |
|
|
1079 while (ptr) |
|
|
1080 { |
|
|
1081 assert (count < n); |
|
|
1082 |
|
|
1083 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1084 |
|
|
1085 unsigned my_type = ptr->type (); |
|
|
1086 |
|
|
1087 if ((type & my_type) && (scope & my_scope) |
|
|
1088 && fnmatch (pat, ptr->name (), __FNM_FLAGS) == 0) |
|
|
1089 { |
|
|
1090 symbols[count++] = ptr; |
|
|
1091 } |
|
|
1092 |
|
|
1093 ptr = ptr->next (); |
|
|
1094 } |
|
|
1095 } |
|
|
1096 symbols[count] = 0; |
|
|
1097 |
|
|
1098 return symbols; |
|
|
1099 } |
|
|
1100 |
|
220
|
1101 void |
|
|
1102 symbol_table::push_context (void) |
|
|
1103 { |
|
|
1104 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1105 { |
|
|
1106 symbol_record *ptr = table[i].next (); |
|
|
1107 |
|
530
|
1108 while (ptr) |
|
220
|
1109 { |
|
|
1110 ptr->push_context (); |
|
|
1111 ptr = ptr->next (); |
|
|
1112 } |
|
|
1113 } |
|
|
1114 } |
|
|
1115 |
|
|
1116 void |
|
|
1117 symbol_table::pop_context (void) |
|
|
1118 { |
|
|
1119 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1120 { |
|
|
1121 symbol_record *ptr = table[i].next (); |
|
|
1122 |
|
530
|
1123 while (ptr) |
|
220
|
1124 { |
|
|
1125 ptr->pop_context (); |
|
|
1126 ptr = ptr->next (); |
|
|
1127 } |
|
|
1128 } |
|
|
1129 } |
|
|
1130 |
|
1
|
1131 // Chris Torek's fave hash function. |
|
|
1132 |
|
|
1133 unsigned int |
|
|
1134 symbol_table::hash (const char *str) |
|
|
1135 { |
|
|
1136 unsigned h = 0; |
|
|
1137 while (*str) |
|
|
1138 h = h * 33 + *str++; |
|
|
1139 return h; |
|
|
1140 } |
|
|
1141 |
|
|
1142 /* |
|
|
1143 ;;; Local Variables: *** |
|
|
1144 ;;; mode: C++ *** |
|
|
1145 ;;; page-delimiter: "^/\\*" *** |
|
|
1146 ;;; End: *** |
|
|
1147 */ |
