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1
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1 // Symbol table classes. -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993 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 // Don't even think about moving the tree.h include to symtab.h... |
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25 |
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26 #ifdef HAVE_CONFIG_H |
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27 #include "config.h" |
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28 #endif |
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29 |
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30 #include "symtab.h" |
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31 #include "error.h" |
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32 #include "variables.h" |
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33 #include "utils.h" |
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34 #include "tree.h" |
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35 #include "tree-const.h" |
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36 |
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37 /* |
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38 * Variables and functions. |
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39 */ |
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40 symbol_def::symbol_def (void) |
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41 { |
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195
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42 init_state (); |
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43 } |
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44 |
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45 symbol_def::symbol_def (tree_constant *t) |
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46 { |
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195
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47 init_state (); |
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48 definition = t; |
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195
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49 type = USER_VARIABLE; |
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50 } |
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51 |
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52 symbol_def::symbol_def (tree_builtin *t) |
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53 { |
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195
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54 init_state (); |
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55 definition = t; |
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195
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56 type = BUILTIN_FUNCTION; |
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57 } |
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58 |
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59 symbol_def::symbol_def (tree_function *t) |
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60 { |
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195
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61 init_state (); |
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62 definition = t; |
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63 type = USER_FUNCTION; |
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64 } |
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65 |
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66 void |
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67 symbol_def::init_state (void) |
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68 { |
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69 type = UNKNOWN; |
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70 eternal = 0; |
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71 read_only = 0; |
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72 |
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73 help_string = (char *) NULL; |
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195
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74 definition = NULL_TREE; |
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75 next_elem = (symbol_def *) NULL; |
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76 count = 0; |
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77 } |
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78 |
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79 symbol_def::~symbol_def (void) |
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80 { |
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81 delete [] help_string; |
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82 delete definition; |
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83 } |
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84 |
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195
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85 int |
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86 symbol_def::is_variable (void) const |
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87 { |
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88 return (type == USER_VARIABLE || type == BUILTIN_VARIABLE); |
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89 } |
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90 |
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91 int |
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92 symbol_def::is_function (void) const |
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93 { |
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94 return (type == USER_FUNCTION || type == BUILTIN_FUNCTION); |
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95 } |
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96 |
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97 int |
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98 symbol_def::is_user_variable (void) const |
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99 { |
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100 return (type == USER_VARIABLE); |
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101 } |
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102 |
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103 int |
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104 symbol_def::is_user_function (void) const |
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105 { |
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106 return (type == USER_FUNCTION); |
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107 } |
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108 |
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109 int |
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110 symbol_def::is_builtin_variable (void) const |
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111 { |
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112 return (type == BUILTIN_VARIABLE); |
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113 } |
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114 |
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115 int |
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116 symbol_def::is_builtin_function (void) const |
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117 { |
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118 return (type == BUILTIN_FUNCTION); |
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119 } |
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120 |
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121 void |
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122 symbol_def::define (tree_constant *t) |
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123 { |
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124 definition = t; |
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195
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125 if (! is_builtin_variable ()) |
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126 type = USER_VARIABLE; |
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127 } |
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128 |
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129 void |
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130 symbol_def::define (tree_builtin *t) |
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131 { |
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132 definition = t; |
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195
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133 type = BUILTIN_FUNCTION; |
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134 } |
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135 |
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136 void |
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137 symbol_def::define (tree_function *t) |
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138 { |
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139 definition = t; |
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195
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140 type = USER_FUNCTION; |
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141 } |
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142 |
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143 void |
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144 symbol_def::protect (void) |
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145 { |
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146 read_only = 1; |
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147 } |
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148 |
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149 void |
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150 symbol_def::unprotect (void) |
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151 { |
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152 read_only = 0; |
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153 |
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154 } |
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155 |
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156 void |
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157 symbol_def::make_eternal (void) |
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158 { |
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159 eternal = 1; |
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160 } |
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161 |
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162 tree * |
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164
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163 symbol_def::def (void) const |
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164 { |
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165 return definition; |
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166 } |
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167 |
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168 char * |
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164
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169 symbol_def::help (void) const |
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170 { |
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171 return help_string; |
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172 } |
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173 |
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174 void |
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164
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175 symbol_def::document (const char *h) |
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176 { |
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177 delete [] help_string; |
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178 help_string = strsave (h); |
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179 } |
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180 |
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181 int |
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182 symbol_def::save (ostream& os, int mark_as_global) |
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183 { |
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264
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184 return definition->save (os, mark_as_global); |
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185 } |
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186 |
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195
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187 int |
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188 maybe_delete (symbol_def *def) |
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189 { |
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190 int count = 0; |
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191 if (def != (symbol_def *) NULL) |
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192 { |
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193 if (def->count > 0) |
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194 { |
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195 def->count--; |
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196 count = def->count; |
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197 if (def->count == 0) |
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198 delete def; |
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199 } |
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200 } |
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201 return count; |
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202 } |
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203 |
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204 /* |
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205 * Individual records in a symbol table. |
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206 */ |
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207 symbol_record::symbol_record (void) |
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208 { |
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195
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209 init_state (); |
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210 } |
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211 |
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195
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212 symbol_record::symbol_record (const char *n, |
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213 symbol_record *nxt = (symbol_record *) NULL) |
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214 { |
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195
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215 init_state (); |
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216 nm = strsave (n); |
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217 next_elem = nxt; |
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218 } |
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219 |
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195
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220 void |
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221 symbol_record::init_state (void) |
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222 { |
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223 formal_param = 0; |
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195
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224 linked_to_global = 0; |
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225 nm = (char *) NULL; |
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226 sv_fcn = (sv_Function) NULL; |
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195
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227 definition = (symbol_def *) NULL; |
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228 next_elem = (symbol_record *) NULL; |
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229 } |
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230 |
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231 symbol_record::~symbol_record (void) |
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232 { |
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233 delete [] nm; |
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234 } |
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235 |
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236 char * |
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237 symbol_record::name (void) const |
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238 { |
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239 return nm; |
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240 } |
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241 |
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242 char * |
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164
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243 symbol_record::help (void) const |
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244 { |
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195
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245 if (definition != (symbol_def *) NULL) |
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246 return definition->help (); |
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247 else |
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248 return (char *) NULL; |
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249 } |
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250 |
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195
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251 void |
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252 symbol_record::rename (const char *n) |
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253 { |
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254 delete [] nm; |
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255 nm = strsave (n); |
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256 } |
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257 |
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258 tree * |
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164
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259 symbol_record::def (void) const |
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260 { |
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195
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261 if (definition != (symbol_def *) NULL) |
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262 return definition->def (); |
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263 else |
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195
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264 return NULL_TREE; |
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265 } |
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266 |
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267 int |
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164
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268 symbol_record::is_function (void) const |
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269 { |
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195
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270 if (definition != (symbol_def *) NULL) |
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271 return definition->is_function (); |
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272 else |
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273 return 0; |
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274 } |
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275 |
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276 int |
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277 symbol_record::is_user_function (void) const |
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278 { |
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279 if (definition != (symbol_def *) NULL) |
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280 return definition->is_user_function (); |
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281 else |
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282 return 0; |
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283 } |
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284 |
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285 int |
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286 symbol_record::is_builtin_function (void) const |
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287 { |
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288 if (definition != (symbol_def *) NULL) |
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289 return definition->is_builtin_function (); |
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290 else |
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291 return 0; |
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292 } |
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293 |
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294 int |
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164
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295 symbol_record::is_variable (void) const |
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296 { |
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195
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297 if (definition != (symbol_def *) NULL) |
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298 return definition->is_variable (); |
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299 else |
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300 return 0; |
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301 } |
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302 |
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303 int |
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304 symbol_record::is_user_variable (void) const |
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305 { |
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306 if (definition != (symbol_def *) NULL) |
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307 return definition->is_user_variable (); |
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308 else |
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309 return 0; |
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310 } |
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311 |
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312 int |
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313 symbol_record::is_builtin_variable (void) const |
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314 { |
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315 if (definition != (symbol_def *) NULL) |
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316 return definition->is_builtin_variable (); |
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317 else |
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318 return 0; |
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319 } |
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320 |
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321 unsigned |
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322 symbol_record::type (void) const |
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323 { |
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324 if (definition != (symbol_def *) NULL) |
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325 return definition->type; |
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326 else |
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327 return 0; |
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328 } |
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329 |
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330 int |
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164
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331 symbol_record::is_defined (void) const |
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332 { |
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195
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333 if (definition != (symbol_def *) NULL) |
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334 return (definition->def () != NULL_TREE); |
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335 else |
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336 return 0; |
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337 } |
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338 |
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339 int |
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340 symbol_record::is_read_only (void) const |
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341 { |
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342 if (definition != (symbol_def *) NULL) |
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343 return definition->read_only; |
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344 else |
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345 return 0; |
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346 } |
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347 |
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348 int |
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349 symbol_record::is_eternal (void) const |
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350 { |
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351 if (definition != (symbol_def *) NULL) |
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352 return definition->eternal; |
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353 else |
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354 return 0; |
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355 } |
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356 |
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357 void |
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358 symbol_record::protect (void) |
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359 { |
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360 if (definition != (symbol_def *) NULL) |
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361 { |
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362 definition->protect (); |
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363 |
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364 if (! is_defined ()) |
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365 warning ("protecting 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::unprotect (void) |
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371 { |
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372 if (definition != (symbol_def *) NULL) |
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373 definition->unprotect (); |
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374 } |
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375 |
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376 void |
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377 symbol_record::make_eternal (void) |
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378 { |
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379 if (definition != (symbol_def *) NULL) |
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380 { |
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381 definition->make_eternal (); |
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382 |
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383 if (! is_defined ()) |
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384 warning ("giving eternal life to undefined variable `%s'", nm); |
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385 } |
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386 } |
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387 |
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388 void |
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389 symbol_record::set_sv_function (sv_Function f) |
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390 { |
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391 sv_fcn = f; |
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392 } |
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393 |
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394 int |
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395 symbol_record::define (tree_constant *t) |
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396 { |
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195
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397 if (is_variable () && read_only_error ()) |
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398 return 0; |
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399 |
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195
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400 tree *saved_def = NULL_TREE; |
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401 if (definition == (symbol_def *) NULL) |
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402 { |
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403 definition = new symbol_def (); |
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404 definition->count = 1; |
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405 } |
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406 else if (is_function ()) |
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407 { |
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195
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408 symbol_def *new_def = new symbol_def (); |
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409 push_def (new_def); |
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410 definition->count = 1; |
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411 } |
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195
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412 else if (is_variable ()) |
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413 { |
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195
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414 saved_def = definition->def (); |
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415 } |
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416 |
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195
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417 definition->define (t); |
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418 |
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419 if (sv_fcn != (sv_Function) NULL && sv_fcn () < 0) |
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420 { |
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195
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421 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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422 definition->define ((tree_constant *) saved_def); |
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423 delete t; |
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424 return 0; |
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425 } |
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426 |
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427 delete saved_def; |
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428 |
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429 return 1; |
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430 } |
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431 |
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432 int |
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433 symbol_record::define (tree_builtin *t) |
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434 { |
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195
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435 if (read_only_error ()) |
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1
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436 return 0; |
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437 |
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195
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438 if (is_variable ()) |
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439 { |
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195
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440 symbol_def *old_def = pop_def (); |
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441 maybe_delete (old_def); |
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1
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442 } |
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443 |
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195
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444 if (is_function ()) |
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1
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445 { |
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195
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446 symbol_def *old_def = pop_def (); |
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447 maybe_delete (old_def); |
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1
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448 } |
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449 |
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195
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450 symbol_def *new_def = new symbol_def (t); |
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451 push_def (new_def); |
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452 definition->count = 1; |
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453 |
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1
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454 return 1; |
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455 } |
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456 |
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457 int |
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458 symbol_record::define (tree_function *t) |
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459 { |
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195
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460 if (read_only_error ()) |
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1
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461 return 0; |
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462 |
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195
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463 if (is_variable ()) |
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1
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464 { |
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195
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465 symbol_def *old_def = pop_def (); |
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466 maybe_delete (old_def); |
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1
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467 } |
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468 |
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195
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469 if (is_function ()) |
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1
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470 { |
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195
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471 symbol_def *old_def = pop_def (); |
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472 maybe_delete (old_def); |
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1
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473 } |
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474 |
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195
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475 symbol_def *new_def = new symbol_def (t); |
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476 push_def (new_def); |
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477 definition->count = 1; |
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478 |
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1
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479 return 1; |
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480 } |
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481 |
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482 int |
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483 symbol_record::define_as_fcn (tree_constant *t) |
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484 { |
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195
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485 if (is_variable () && read_only_error ()) |
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1
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486 return 0; |
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487 |
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195
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488 if (is_variable ()) |
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1
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489 { |
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195
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490 symbol_def *old_def = pop_def (); |
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491 maybe_delete (old_def); |
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492 } |
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493 |
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494 if (is_function ()) |
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495 { |
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496 symbol_def *old_def = pop_def (); |
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497 maybe_delete (old_def); |
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1
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498 } |
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499 |
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195
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500 symbol_def *new_def = new symbol_def (t); |
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501 push_def (new_def); |
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502 definition->count = 1; |
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503 definition->type = symbol_def::BUILTIN_FUNCTION; |
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1
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504 |
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505 return 1; |
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506 } |
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507 |
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195
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508 int |
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509 symbol_record::define_builtin_var (tree_constant *t) |
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510 { |
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511 define (t); |
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512 if (is_variable ()) |
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513 definition->type = symbol_def::BUILTIN_VARIABLE; |
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514 } |
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515 |
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1
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516 void |
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164
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517 symbol_record::document (const char *h) |
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1
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518 { |
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195
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519 if (definition != (symbol_def *) NULL) |
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520 { |
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521 definition->document (h); |
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1
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522 |
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195
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523 if (! is_defined ()) |
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524 warning ("documenting undefined variable `%s'", nm); |
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525 } |
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1
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526 } |
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527 |
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528 int |
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529 symbol_record::save (ostream& os, int mark_as_global = 0) |
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530 { |
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264
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531 int status = -1; |
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1
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532 |
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195
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533 // This is a kludge, but hey, it doesn't make sense to save them |
|
|
534 // anyway, does it? Even if it did, we would just have trouble trying |
|
|
535 // to read NaN and Inf on lots of systems anyway... |
|
264
|
536 // |
|
|
537 // Should we also save the help string? Maybe someday. |
|
195
|
538 |
|
|
539 if (is_read_only ()) |
|
264
|
540 warning ("save: sorry, can't save read-only variable `%s'", nm); |
|
195
|
541 else if (is_function ()) |
|
264
|
542 warning ("save: sorry, can't save function `%s'", nm); |
|
|
543 else if (! is_defined ()) |
|
|
544 warning ("save: sorry, can't save undefined variable `%s'", nm); |
|
1
|
545 else |
|
111
|
546 { |
|
195
|
547 os << "# name: " << nm << "\n"; |
|
|
548 status = definition->save (os, mark_as_global); |
|
111
|
549 } |
|
1
|
550 |
|
|
551 return status; |
|
|
552 } |
|
|
553 |
|
186
|
554 int |
|
195
|
555 symbol_record::clear (void) |
|
1
|
556 { |
|
195
|
557 int count = 0; |
|
|
558 if (linked_to_global) |
|
1
|
559 { |
|
195
|
560 count = maybe_delete (definition); |
|
|
561 definition = (symbol_def *) NULL; |
|
|
562 linked_to_global = 0; |
|
1
|
563 } |
|
195
|
564 else |
|
|
565 { |
|
|
566 symbol_def *old_def = pop_def (); |
|
|
567 count = maybe_delete (old_def); |
|
|
568 } |
|
|
569 return count; |
|
1
|
570 } |
|
|
571 |
|
|
572 void |
|
195
|
573 symbol_record::alias (symbol_record *s, int force = 0) |
|
1
|
574 { |
|
195
|
575 sv_fcn = s->sv_fcn; |
|
|
576 |
|
|
577 if (force && s->definition == (symbol_def *) NULL) |
|
1
|
578 { |
|
195
|
579 s->definition = new symbol_def (); |
|
|
580 definition = s->definition; |
|
|
581 definition->count = 2; // Yes, this is correct. |
|
1
|
582 } |
|
195
|
583 else if (s->definition != (symbol_def *) NULL) |
|
1
|
584 { |
|
195
|
585 definition = s->definition; |
|
|
586 definition->count++; |
|
1
|
587 } |
|
|
588 } |
|
|
589 |
|
|
590 void |
|
|
591 symbol_record::mark_as_formal_parameter (void) |
|
|
592 { |
|
|
593 formal_param = 1; |
|
|
594 } |
|
|
595 |
|
|
596 int |
|
164
|
597 symbol_record::is_formal_parameter (void) const |
|
1
|
598 { |
|
|
599 return formal_param; |
|
|
600 } |
|
|
601 |
|
|
602 void |
|
195
|
603 symbol_record::mark_as_linked_to_global (void) |
|
122
|
604 { |
|
195
|
605 linked_to_global = 1; |
|
122
|
606 } |
|
|
607 |
|
|
608 int |
|
195
|
609 symbol_record::is_linked_to_global (void) const |
|
1
|
610 { |
|
195
|
611 return linked_to_global; |
|
1
|
612 } |
|
|
613 |
|
|
614 symbol_record * |
|
164
|
615 symbol_record::next (void) const |
|
1
|
616 { |
|
|
617 return next_elem; |
|
|
618 } |
|
|
619 |
|
195
|
620 void |
|
|
621 symbol_record::chain (symbol_record *s) |
|
|
622 { |
|
|
623 next_elem = s; |
|
|
624 } |
|
|
625 |
|
220
|
626 void |
|
|
627 symbol_record::push_context (void) |
|
|
628 { |
|
|
629 context.push (definition); |
|
|
630 definition = (symbol_def *) NULL; |
|
|
631 } |
|
|
632 |
|
|
633 void |
|
|
634 symbol_record::pop_context (void) |
|
|
635 { |
|
|
636 assert (! context.empty ()); |
|
|
637 |
|
|
638 if (is_variable ()) |
|
|
639 { |
|
|
640 symbol_def *old_def = pop_def (); |
|
|
641 maybe_delete (old_def); |
|
|
642 } |
|
|
643 |
|
|
644 if (is_function ()) |
|
|
645 { |
|
|
646 symbol_def *old_def = pop_def (); |
|
|
647 maybe_delete (old_def); |
|
|
648 } |
|
|
649 |
|
|
650 definition = context.pop (); |
|
|
651 } |
|
|
652 |
|
195
|
653 int |
|
|
654 symbol_record::read_only_error (void) |
|
|
655 { |
|
|
656 if (is_read_only ()) |
|
|
657 { |
|
|
658 char *tag = "symbol"; |
|
|
659 if (is_variable ()) |
|
|
660 tag = "variable"; |
|
|
661 else if (is_function ()) |
|
|
662 tag = "function"; |
|
|
663 |
|
240
|
664 ::error ("can't redefined read-only %s `%s'", tag, nm); |
|
195
|
665 |
|
|
666 return 1; |
|
|
667 } |
|
|
668 else |
|
|
669 return 0; |
|
|
670 } |
|
|
671 |
|
|
672 void |
|
|
673 symbol_record::push_def (symbol_def *sd) |
|
|
674 { |
|
|
675 if (sd == (symbol_def *) NULL) |
|
|
676 return; |
|
|
677 |
|
|
678 sd->next_elem = definition; |
|
|
679 definition = sd; |
|
|
680 } |
|
|
681 |
|
|
682 symbol_def * |
|
|
683 symbol_record::pop_def (void) |
|
|
684 { |
|
|
685 symbol_def *top = definition; |
|
|
686 if (definition != (symbol_def *) NULL) |
|
|
687 definition = definition->next_elem; |
|
|
688 return top; |
|
|
689 } |
|
|
690 |
|
|
691 /* |
|
|
692 * A structure for handling verbose information about a symbol_record. |
|
|
693 */ |
|
|
694 |
|
|
695 symbol_record_info::symbol_record_info (void) |
|
|
696 { |
|
|
697 init_state (); |
|
|
698 } |
|
|
699 |
|
|
700 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
|
701 { |
|
|
702 init_state (); |
|
|
703 |
|
|
704 type = sr.type (); |
|
|
705 |
|
|
706 if (sr.is_variable () && sr.is_defined ()) |
|
|
707 { |
|
|
708 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
709 tree_constant *tmp = (tree_constant *) sr.def (); |
|
|
710 switch (tmp->const_type ()) |
|
|
711 { |
|
|
712 case tree_constant_rep::scalar_constant: |
|
|
713 const_type = SR_INFO_SCALAR; |
|
|
714 break; |
|
|
715 case tree_constant_rep::complex_scalar_constant: |
|
|
716 const_type = SR_INFO_COMPLEX_SCALAR; |
|
|
717 break; |
|
|
718 case tree_constant_rep::matrix_constant: |
|
|
719 const_type = SR_INFO_MATRIX; |
|
|
720 break; |
|
|
721 case tree_constant_rep::complex_matrix_constant: |
|
|
722 const_type = SR_INFO_COMPLEX_MATRIX; |
|
|
723 break; |
|
|
724 case tree_constant_rep::range_constant: |
|
|
725 const_type = SR_INFO_RANGE; |
|
|
726 break; |
|
|
727 case tree_constant_rep::string_constant: |
|
|
728 const_type = SR_INFO_STRING; |
|
|
729 break; |
|
|
730 default: |
|
|
731 break; |
|
|
732 } |
|
|
733 |
|
|
734 nr = tmp->rows (); |
|
|
735 nc = tmp->columns (); |
|
|
736 |
|
|
737 symbol_def *sr_def = sr.definition; |
|
|
738 symbol_def *hidden_def = sr_def->next_elem; |
|
|
739 if (hidden_def != (symbol_def *) NULL) |
|
|
740 { |
|
|
741 if (hidden_def->is_user_function ()) |
|
|
742 hides = SR_INFO_USER_FUNCTION; |
|
|
743 else if (hidden_def->is_builtin_function ()) |
|
|
744 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
745 } |
|
|
746 } |
|
|
747 |
|
|
748 eternal = sr.is_eternal (); |
|
|
749 read_only = sr.is_read_only (); |
|
|
750 |
|
|
751 nm = strsave (sr.name ()); |
|
|
752 |
|
|
753 initialized = 1; |
|
|
754 } |
|
|
755 |
|
|
756 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
|
757 { |
|
|
758 type = s.type; |
|
|
759 const_type = s.const_type; |
|
|
760 hides = s.hides; |
|
|
761 eternal = s.eternal; |
|
|
762 read_only = s.read_only; |
|
|
763 nr = s.nr; |
|
|
764 nc = s.nc; |
|
|
765 nm = strsave (s.nm); |
|
|
766 initialized = s.initialized; |
|
|
767 } |
|
|
768 |
|
|
769 symbol_record_info::~symbol_record_info (void) |
|
|
770 { |
|
|
771 delete nm; |
|
|
772 } |
|
|
773 |
|
|
774 symbol_record_info& |
|
|
775 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
776 { |
|
|
777 if (this != &s) |
|
|
778 { |
|
|
779 delete nm; |
|
|
780 type = s.type; |
|
|
781 const_type = s.const_type; |
|
|
782 hides = s.hides; |
|
|
783 eternal = s.eternal; |
|
|
784 read_only = s.read_only; |
|
|
785 nr = s.nr; |
|
|
786 nc = s.nc; |
|
|
787 nm = strsave (s.nm); |
|
|
788 initialized = s.initialized; |
|
|
789 } |
|
|
790 return *this; |
|
|
791 } |
|
|
792 |
|
|
793 int |
|
|
794 symbol_record_info::is_defined (void) const |
|
|
795 { |
|
|
796 return initialized; |
|
|
797 } |
|
|
798 |
|
|
799 int |
|
|
800 symbol_record_info::is_read_only (void) const |
|
|
801 { |
|
|
802 return read_only; |
|
|
803 } |
|
|
804 |
|
|
805 int |
|
|
806 symbol_record_info::is_eternal (void) const |
|
|
807 { |
|
|
808 return eternal; |
|
|
809 } |
|
|
810 |
|
|
811 int |
|
|
812 symbol_record_info::hides_fcn (void) const |
|
|
813 { |
|
|
814 return (hides & SR_INFO_USER_FUNCTION); |
|
|
815 } |
|
|
816 |
|
|
817 int |
|
|
818 symbol_record_info::hides_builtin (void) const |
|
|
819 { |
|
|
820 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
821 } |
|
|
822 |
|
|
823 char * |
|
|
824 symbol_record_info::type_as_string (void) const |
|
|
825 { |
|
|
826 if (type == symbol_def::USER_FUNCTION) |
|
|
827 return "user function"; |
|
|
828 else if (type == symbol_def::BUILTIN_FUNCTION) |
|
|
829 return "builtin function"; |
|
|
830 else |
|
|
831 { |
|
|
832 if (const_type == SR_INFO_SCALAR) |
|
|
833 return "real scalar"; |
|
|
834 else if (const_type == SR_INFO_COMPLEX_SCALAR) |
|
|
835 return "complex scalar"; |
|
|
836 else if (const_type == SR_INFO_MATRIX) |
|
|
837 return "real matrix"; |
|
|
838 else if (const_type == SR_INFO_COMPLEX_MATRIX) |
|
|
839 return "complex matrix"; |
|
|
840 else if (const_type == SR_INFO_RANGE) |
|
|
841 return "range"; |
|
|
842 else if (const_type == SR_INFO_STRING) |
|
|
843 return "string"; |
|
|
844 else |
|
|
845 return ""; |
|
|
846 } |
|
|
847 } |
|
|
848 |
|
|
849 int |
|
|
850 symbol_record_info::is_function (void) const |
|
|
851 { |
|
|
852 return (type == symbol_def::USER_FUNCTION |
|
|
853 || type == symbol_def::BUILTIN_FUNCTION); |
|
|
854 } |
|
|
855 |
|
|
856 int |
|
|
857 symbol_record_info::rows (void) const |
|
|
858 { |
|
|
859 return nr; |
|
|
860 } |
|
|
861 |
|
|
862 int |
|
|
863 symbol_record_info::columns (void) const |
|
|
864 { |
|
|
865 return nc; |
|
|
866 } |
|
|
867 |
|
|
868 char * |
|
|
869 symbol_record_info::name (void) const |
|
|
870 { |
|
|
871 return nm; |
|
|
872 } |
|
|
873 |
|
|
874 void |
|
|
875 symbol_record_info::init_state (void) |
|
|
876 { |
|
|
877 initialized = 0; |
|
|
878 type = symbol_def::UNKNOWN; |
|
|
879 const_type = SR_INFO_UNKNOWN; |
|
|
880 hides = SR_INFO_NONE; |
|
|
881 eternal = 0; |
|
|
882 read_only = 0; |
|
|
883 nr = -1; |
|
|
884 nc = -1; |
|
|
885 nm = (char *) NULL; |
|
|
886 } |
|
|
887 |
|
1
|
888 /* |
|
|
889 * A symbol table. |
|
|
890 */ |
|
|
891 |
|
|
892 symbol_table::symbol_table (void) |
|
|
893 { |
|
|
894 } |
|
|
895 |
|
|
896 symbol_record * |
|
164
|
897 symbol_table::lookup (const char *nm, int insert = 0, int warn = 0) |
|
1
|
898 { |
|
|
899 int index = hash (nm) & HASH_MASK; |
|
|
900 |
|
|
901 symbol_record *ptr = table[index].next (); |
|
|
902 |
|
|
903 while (ptr != (symbol_record *) NULL) |
|
|
904 { |
|
|
905 if (strcmp (ptr->name (), nm) == 0) |
|
|
906 return ptr; |
|
|
907 ptr = ptr->next (); |
|
|
908 } |
|
|
909 |
|
|
910 if (insert) |
|
|
911 { |
|
|
912 symbol_record *new_sym; |
|
|
913 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
914 table[index].chain (new_sym); |
|
1
|
915 return new_sym; |
|
|
916 } |
|
|
917 else if (warn) |
|
217
|
918 warning ("lookup: symbol`%s' not found", nm); |
|
1
|
919 |
|
|
920 return (symbol_record *) NULL; |
|
|
921 } |
|
|
922 |
|
|
923 void |
|
195
|
924 symbol_table::clear (int clear_user_functions = 1) |
|
1
|
925 { |
|
|
926 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
927 { |
|
169
|
928 symbol_record *ptr = table[i].next (); |
|
1
|
929 |
|
169
|
930 while (ptr != (symbol_record *) NULL) |
|
|
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 |
|
195
|
944 symbol_table::clear (const char *nm, int clear_user_functions = 1) |
|
1
|
945 { |
|
|
946 int index = hash (nm) & HASH_MASK; |
|
|
947 |
|
195
|
948 symbol_record *ptr = table[index].next (); |
|
1
|
949 |
|
195
|
950 while (ptr != (symbol_record *) NULL) |
|
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 |
|
|
966 symbol_table::save (ostream& os, int mark_as_global = 0) |
|
|
967 { |
|
|
968 int status = 0; |
|
195
|
969 int count; |
|
|
970 char **names = list (count, 1, symbol_def::USER_VARIABLE); |
|
200
|
971 char **ptr = names; |
|
|
972 if (ptr != (char **) NULL) |
|
1
|
973 { |
|
200
|
974 while (*ptr != (char *) NULL) |
|
111
|
975 { |
|
200
|
976 if (save (os, *ptr, mark_as_global)) |
|
111
|
977 status++; |
|
244
|
978 delete [] *ptr++; |
|
111
|
979 } |
|
200
|
980 delete [] names; |
|
1
|
981 } |
|
|
982 return status; |
|
|
983 } |
|
|
984 |
|
|
985 int |
|
164
|
986 symbol_table::save (ostream& os, const char *name, int mark_as_global = 0) |
|
1
|
987 { |
|
|
988 int status = 0; |
|
|
989 symbol_record *sr = lookup (name, 0, 0); |
|
|
990 if (sr != (symbol_record *) NULL) |
|
|
991 status = sr->save (os, mark_as_global); |
|
|
992 return status; |
|
|
993 } |
|
|
994 |
|
|
995 int |
|
164
|
996 symbol_table::size (void) const |
|
1
|
997 { |
|
|
998 int count = 0; |
|
|
999 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1000 { |
|
|
1001 symbol_record *ptr = table[i].next (); |
|
|
1002 while (ptr != (symbol_record *) NULL) |
|
|
1003 { |
|
|
1004 count++; |
|
|
1005 ptr = ptr->next (); |
|
|
1006 } |
|
|
1007 } |
|
|
1008 return count; |
|
|
1009 } |
|
|
1010 |
|
195
|
1011 static inline int |
|
|
1012 pstrcmp (char **a, char **b) |
|
1
|
1013 { |
|
195
|
1014 return strcmp (*a, *b); |
|
1
|
1015 } |
|
|
1016 |
|
195
|
1017 static inline int |
|
|
1018 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
1019 { |
|
195
|
1020 return strcmp (a->name (), b->name ()); |
|
1
|
1021 } |
|
|
1022 |
|
195
|
1023 // This function should probably share code with symbol_table::list. |
|
|
1024 // XXX FIXME XXX |
|
1
|
1025 |
|
195
|
1026 symbol_record_info * |
|
|
1027 symbol_table::long_list (int& count, int sort = 0, |
|
|
1028 unsigned type = SYMTAB_ALL_TYPES, |
|
|
1029 unsigned scope = SYMTAB_ALL_SCOPES) const |
|
1
|
1030 { |
|
115
|
1031 count = 0; |
|
1
|
1032 int n = size (); |
|
|
1033 if (n == 0) |
|
195
|
1034 return (symbol_record_info *) NULL; |
|
1
|
1035 |
|
195
|
1036 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1037 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1038 { |
|
|
1039 symbol_record *ptr = table[i].next (); |
|
|
1040 while (ptr != (symbol_record *) NULL) |
|
|
1041 { |
|
|
1042 assert (count < n); |
|
195
|
1043 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1044 unsigned my_type = ptr->type (); |
|
|
1045 if ((type & my_type) && (scope & my_scope)) |
|
|
1046 { |
|
|
1047 symbols[count++] = symbol_record_info (*ptr); |
|
|
1048 } |
|
1
|
1049 ptr = ptr->next (); |
|
|
1050 } |
|
|
1051 } |
|
195
|
1052 symbols[count] = symbol_record_info (); |
|
|
1053 |
|
|
1054 if (sort && symbols != (symbol_record_info *) NULL) |
|
|
1055 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
|
1056 (int (*)(void*, void*)) symbol_record_info_cmp); |
|
|
1057 |
|
1
|
1058 return symbols; |
|
|
1059 } |
|
|
1060 |
|
|
1061 char ** |
|
195
|
1062 symbol_table::list (int& count, int sort = 0, |
|
|
1063 unsigned type = SYMTAB_ALL_TYPES, |
|
|
1064 unsigned scope = SYMTAB_ALL_SCOPES) const |
|
1
|
1065 { |
|
115
|
1066 count = 0; |
|
1
|
1067 int n = size (); |
|
|
1068 if (n == 0) |
|
|
1069 return (char **) NULL; |
|
|
1070 |
|
|
1071 char **symbols = new char * [n+1]; |
|
|
1072 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1073 { |
|
|
1074 symbol_record *ptr = table[i].next (); |
|
|
1075 while (ptr != (symbol_record *) NULL) |
|
|
1076 { |
|
|
1077 assert (count < n); |
|
195
|
1078 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1079 unsigned my_type = ptr->type (); |
|
|
1080 if ((type & my_type) && (scope & my_scope)) |
|
1
|
1081 symbols[count++] = strsave (ptr->name ()); |
|
|
1082 ptr = ptr->next (); |
|
|
1083 } |
|
|
1084 } |
|
|
1085 symbols[count] = (char *) NULL; |
|
|
1086 |
|
195
|
1087 if (sort && symbols != (char **) NULL) |
|
1
|
1088 qsort ((void **) symbols, count, sizeof (char *), |
|
|
1089 (int (*)(void*, void*)) pstrcmp); |
|
|
1090 |
|
|
1091 return symbols; |
|
|
1092 } |
|
|
1093 |
|
220
|
1094 void |
|
|
1095 symbol_table::push_context (void) |
|
|
1096 { |
|
|
1097 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1098 { |
|
|
1099 symbol_record *ptr = table[i].next (); |
|
|
1100 |
|
|
1101 while (ptr != (symbol_record *) NULL) |
|
|
1102 { |
|
|
1103 ptr->push_context (); |
|
|
1104 ptr = ptr->next (); |
|
|
1105 } |
|
|
1106 } |
|
|
1107 } |
|
|
1108 |
|
|
1109 void |
|
|
1110 symbol_table::pop_context (void) |
|
|
1111 { |
|
|
1112 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1113 { |
|
|
1114 symbol_record *ptr = table[i].next (); |
|
|
1115 |
|
|
1116 while (ptr != (symbol_record *) NULL) |
|
|
1117 { |
|
|
1118 ptr->pop_context (); |
|
|
1119 ptr = ptr->next (); |
|
|
1120 } |
|
|
1121 } |
|
|
1122 } |
|
|
1123 |
|
1
|
1124 // Chris Torek's fave hash function. |
|
|
1125 |
|
|
1126 unsigned int |
|
|
1127 symbol_table::hash (const char *str) |
|
|
1128 { |
|
|
1129 unsigned h = 0; |
|
|
1130 while (*str) |
|
|
1131 h = h * 33 + *str++; |
|
|
1132 return h; |
|
|
1133 } |
|
|
1134 |
|
|
1135 /* |
|
|
1136 ;;; Local Variables: *** |
|
|
1137 ;;; mode: C++ *** |
|
|
1138 ;;; page-delimiter: "^/\\*" *** |
|
|
1139 ;;; End: *** |
|
|
1140 */ |
