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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 // 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 #if defined (__GNUG__) |
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31 #pragma implementation |
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32 #endif |
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33 |
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34 #include "symtab.h" |
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35 #include "error.h" |
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36 #include "variables.h" |
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37 #include "utils.h" |
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38 #include "tree.h" |
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39 #include "tree-const.h" |
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40 |
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41 /* |
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42 * Variables and functions. |
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43 */ |
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44 symbol_def::symbol_def (void) |
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45 { |
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46 init_state (); |
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47 } |
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48 |
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49 symbol_def::symbol_def (tree_constant *t) |
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50 { |
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51 init_state (); |
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52 definition = t; |
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53 type = USER_VARIABLE; |
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54 } |
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55 |
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56 symbol_def::symbol_def (tree_builtin *t, unsigned fcn_type) |
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57 { |
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58 init_state (); |
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59 definition = t; |
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60 type = BUILTIN_FUNCTION | fcn_type; |
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61 } |
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62 |
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63 symbol_def::symbol_def (tree_function *t, unsigned fcn_type) |
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64 { |
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65 init_state (); |
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66 definition = t; |
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67 type = USER_FUNCTION | fcn_type; |
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195
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68 } |
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69 |
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70 void |
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71 symbol_def::init_state (void) |
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72 { |
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73 type = UNKNOWN; |
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74 eternal = 0; |
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75 read_only = 0; |
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76 |
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77 help_string = 0; |
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78 definition = 0; |
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79 next_elem = 0; |
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80 count = 0; |
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81 } |
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82 |
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83 symbol_def::~symbol_def (void) |
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84 { |
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85 delete [] help_string; |
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86 delete definition; |
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87 } |
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88 |
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195
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89 int |
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90 symbol_def::is_variable (void) const |
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91 { |
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92 return (type & USER_VARIABLE || type & BUILTIN_VARIABLE); |
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195
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93 } |
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94 |
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95 int |
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96 symbol_def::is_function (void) const |
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97 { |
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98 return (type & USER_FUNCTION || type & BUILTIN_FUNCTION); |
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195
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99 } |
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100 |
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101 int |
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102 symbol_def::is_user_variable (void) const |
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103 { |
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104 return (type & USER_VARIABLE); |
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105 } |
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106 |
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107 int |
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108 symbol_def::is_text_function (void) const |
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109 { |
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110 return (type & TEXT_FUNCTION); |
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111 } |
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112 |
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113 int |
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114 symbol_def::is_mapper_function (void) const |
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115 { |
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116 return (type & MAPPER_FUNCTION); |
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195
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117 } |
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118 |
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119 int |
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120 symbol_def::is_user_function (void) const |
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121 { |
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122 return (type & USER_FUNCTION); |
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195
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123 } |
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124 |
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125 int |
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126 symbol_def::is_builtin_variable (void) const |
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127 { |
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128 return (type & BUILTIN_VARIABLE); |
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129 } |
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130 |
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131 int |
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132 symbol_def::is_builtin_function (void) const |
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133 { |
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134 return (type & BUILTIN_FUNCTION); |
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195
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135 } |
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136 |
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137 void |
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138 symbol_def::define (tree_constant *t) |
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139 { |
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140 definition = t; |
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141 if (! is_builtin_variable ()) |
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142 type = USER_VARIABLE; |
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143 } |
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144 |
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145 void |
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146 symbol_def::define (tree_builtin *t, unsigned fcn_type) |
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147 { |
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148 definition = t; |
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149 type = BUILTIN_FUNCTION | fcn_type; |
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150 } |
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151 |
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152 void |
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153 symbol_def::define (tree_function *t, unsigned fcn_type) |
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154 { |
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155 definition = t; |
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156 type = USER_FUNCTION | fcn_type; |
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195
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157 } |
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158 |
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159 void |
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160 symbol_def::protect (void) |
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161 { |
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162 read_only = 1; |
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163 } |
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164 |
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165 void |
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166 symbol_def::unprotect (void) |
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167 { |
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168 read_only = 0; |
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169 |
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170 } |
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171 |
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172 void |
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173 symbol_def::make_eternal (void) |
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174 { |
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175 eternal = 1; |
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176 } |
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177 |
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178 tree_fvc * |
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179 symbol_def::def (void) const |
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180 { |
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181 return definition; |
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182 } |
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183 |
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184 char * |
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185 symbol_def::help (void) const |
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186 { |
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187 return help_string; |
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188 } |
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189 |
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190 void |
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191 symbol_def::document (const char *h) |
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192 { |
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193 delete [] help_string; |
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194 help_string = strsave (h); |
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195 } |
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196 |
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197 int |
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198 symbol_def::save (ostream& os, int mark_as_global, int precision) |
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199 { |
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200 return definition->save (os, mark_as_global, precision); |
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201 } |
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202 |
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195
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203 int |
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204 maybe_delete (symbol_def *def) |
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205 { |
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206 int count = 0; |
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207 if (def && def->count > 0) |
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208 { |
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209 def->count--; |
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210 count = def->count; |
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211 if (def->count == 0) |
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212 delete def; |
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195
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213 } |
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214 return count; |
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215 } |
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216 |
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217 /* |
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218 * Individual records in a symbol table. |
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219 */ |
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220 symbol_record::symbol_record (void) |
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221 { |
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222 init_state (); |
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223 } |
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224 |
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225 symbol_record::symbol_record (const char *n, symbol_record *nxt) |
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226 { |
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227 init_state (); |
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228 nm = strsave (n); |
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229 next_elem = nxt; |
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230 } |
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231 |
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195
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232 void |
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233 symbol_record::init_state (void) |
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234 { |
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235 formal_param = 0; |
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236 linked_to_global = 0; |
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237 nm = 0; |
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238 sv_fcn = 0; |
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239 definition = 0; |
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240 next_elem = 0; |
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241 } |
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242 |
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243 symbol_record::~symbol_record (void) |
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244 { |
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245 delete [] nm; |
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246 } |
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247 |
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248 char * |
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249 symbol_record::name (void) const |
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250 { |
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251 return nm; |
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252 } |
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253 |
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254 char * |
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255 symbol_record::help (void) const |
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256 { |
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257 return definition ? definition->help () : 0; |
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258 } |
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259 |
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260 tree_fvc * |
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261 symbol_record::def (void) const |
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262 { |
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263 return definition ? definition->def () : 0; |
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264 } |
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265 |
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572
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266 void |
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267 symbol_record::rename (const char *new_name) |
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268 { |
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269 delete [] nm; |
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270 nm = strsave (new_name); |
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271 } |
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272 |
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273 int |
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274 symbol_record::is_function (void) const |
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275 { |
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276 return definition ? definition->is_function () : 0; |
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277 } |
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278 |
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279 int |
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280 symbol_record::is_text_function (void) const |
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281 { |
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282 return definition ? definition->is_text_function () : 0; |
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283 } |
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284 |
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285 int |
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286 symbol_record::is_mapper_function (void) const |
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287 { |
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288 return definition ? definition->is_mapper_function () : 0; |
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289 } |
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290 |
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291 int |
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292 symbol_record::is_user_function (void) const |
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293 { |
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294 return definition ? definition->is_user_function () : 0; |
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295 } |
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296 |
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297 int |
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298 symbol_record::is_builtin_function (void) const |
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299 { |
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300 return definition ? definition->is_builtin_function () : 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_variable (void) const |
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305 { |
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306 return definition ? definition->is_variable () : 0; |
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307 } |
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308 |
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309 int |
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310 symbol_record::is_user_variable (void) const |
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311 { |
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312 return definition ? definition->is_user_variable () : 0; |
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313 } |
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314 |
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315 int |
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316 symbol_record::is_builtin_variable (void) const |
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317 { |
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318 return definition ? definition->is_builtin_variable () : 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 return definition ? definition->type : 0; |
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325 } |
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326 |
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327 int |
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328 symbol_record::is_defined (void) const |
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329 { |
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330 return definition ? (definition->def () != 0) : 0; |
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331 } |
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332 |
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333 int |
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334 symbol_record::is_read_only (void) const |
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335 { |
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336 return definition ? definition->read_only : 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_eternal (void) const |
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341 { |
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342 return definition ? definition->eternal : 0; |
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343 } |
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344 |
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345 void |
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346 symbol_record::protect (void) |
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347 { |
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348 if (definition) |
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349 { |
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350 definition->protect (); |
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351 |
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352 if (! is_defined ()) |
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353 warning ("protecting undefined variable `%s'", nm); |
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354 } |
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355 } |
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356 |
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357 void |
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358 symbol_record::unprotect (void) |
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359 { |
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360 if (definition) |
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361 definition->unprotect (); |
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362 } |
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363 |
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364 void |
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365 symbol_record::make_eternal (void) |
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366 { |
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367 if (definition) |
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368 { |
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369 definition->make_eternal (); |
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370 |
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371 if (! is_defined ()) |
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372 warning ("giving eternal life to undefined variable `%s'", nm); |
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373 } |
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374 } |
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375 |
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376 void |
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377 symbol_record::set_sv_function (sv_Function f) |
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378 { |
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379 sv_fcn = f; |
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380 } |
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381 |
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382 int |
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383 symbol_record::define (tree_constant *t) |
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384 { |
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385 if (is_variable () && read_only_error ()) |
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386 return 0; |
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387 |
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388 tree_fvc *saved_def = 0; |
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389 if (! definition) |
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195
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390 { |
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391 definition = new symbol_def (); |
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392 definition->count = 1; |
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393 } |
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394 else if (is_function ()) |
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395 { |
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195
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396 symbol_def *new_def = new symbol_def (); |
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397 push_def (new_def); |
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398 definition->count = 1; |
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399 } |
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195
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400 else if (is_variable ()) |
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401 { |
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402 saved_def = definition->def (); |
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403 } |
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404 |
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195
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405 definition->define (t); |
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406 |
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407 if (sv_fcn && sv_fcn () < 0) |
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408 { |
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195
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409 // Would be nice to be able to avoid this cast. XXX FIXME XXX |
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410 definition->define ((tree_constant *) saved_def); |
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411 delete t; |
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412 return 0; |
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413 } |
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414 |
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415 delete saved_def; |
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416 |
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417 return 1; |
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418 } |
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419 |
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420 int |
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421 symbol_record::define (tree_builtin *t, int text_fcn) |
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422 { |
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195
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423 if (read_only_error ()) |
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424 return 0; |
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425 |
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195
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426 if (is_variable ()) |
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427 { |
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195
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428 symbol_def *old_def = pop_def (); |
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429 maybe_delete (old_def); |
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430 } |
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431 |
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195
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432 if (is_function ()) |
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433 { |
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195
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434 symbol_def *old_def = pop_def (); |
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435 maybe_delete (old_def); |
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436 } |
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437 |
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530
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438 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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439 : ((t && t->is_mapper_function ()) ? symbol_def::MAPPER_FUNCTION |
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440 : symbol_def::UNKNOWN); |
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441 |
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442 symbol_def *new_def = new symbol_def (t, fcn_type); |
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443 push_def (new_def); |
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444 definition->count = 1; |
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445 |
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446 return 1; |
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447 } |
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448 |
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449 int |
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530
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450 symbol_record::define (tree_function *t, int text_fcn) |
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451 { |
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195
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452 if (read_only_error ()) |
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453 return 0; |
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454 |
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195
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455 if (is_variable ()) |
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456 { |
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195
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457 symbol_def *old_def = pop_def (); |
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458 maybe_delete (old_def); |
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1
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459 } |
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460 |
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195
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461 if (is_function ()) |
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1
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462 { |
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195
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463 symbol_def *old_def = pop_def (); |
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464 maybe_delete (old_def); |
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1
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465 } |
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466 |
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530
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467 unsigned fcn_type = text_fcn ? symbol_def::TEXT_FUNCTION |
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468 : symbol_def::UNKNOWN; |
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469 |
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470 symbol_def *new_def = new symbol_def (t, fcn_type); |
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195
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471 push_def (new_def); |
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472 definition->count = 1; |
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473 |
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1
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474 return 1; |
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475 } |
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476 |
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477 int |
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478 symbol_record::define_as_fcn (tree_constant *t) |
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479 { |
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195
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480 if (is_variable () && read_only_error ()) |
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1
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481 return 0; |
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482 |
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195
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483 if (is_variable ()) |
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1
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484 { |
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195
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485 symbol_def *old_def = pop_def (); |
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486 maybe_delete (old_def); |
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487 } |
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488 |
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489 if (is_function ()) |
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490 { |
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491 symbol_def *old_def = pop_def (); |
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492 maybe_delete (old_def); |
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1
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493 } |
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494 |
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195
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495 symbol_def *new_def = new symbol_def (t); |
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496 push_def (new_def); |
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497 definition->count = 1; |
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498 definition->type = symbol_def::BUILTIN_FUNCTION; |
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1
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499 |
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500 return 1; |
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501 } |
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502 |
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195
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503 int |
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504 symbol_record::define_builtin_var (tree_constant *t) |
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505 { |
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506 define (t); |
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507 if (is_variable ()) |
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508 definition->type = symbol_def::BUILTIN_VARIABLE; |
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530
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509 return 1; |
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195
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510 } |
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511 |
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1
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512 void |
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164
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513 symbol_record::document (const char *h) |
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1
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514 { |
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530
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515 if (definition) |
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195
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516 { |
|
|
517 definition->document (h); |
|
1
|
518 |
|
195
|
519 if (! is_defined ()) |
|
|
520 warning ("documenting undefined variable `%s'", nm); |
|
|
521 } |
|
1
|
522 } |
|
|
523 |
|
|
524 int |
|
530
|
525 symbol_record::save (ostream& os, int mark_as_global, int precision) |
|
1
|
526 { |
|
264
|
527 int status = -1; |
|
1
|
528 |
|
195
|
529 // This is a kludge, but hey, it doesn't make sense to save them |
|
|
530 // anyway, does it? Even if it did, we would just have trouble trying |
|
|
531 // to read NaN and Inf on lots of systems anyway... |
|
264
|
532 // |
|
|
533 // Should we also save the help string? Maybe someday. |
|
195
|
534 |
|
|
535 if (is_read_only ()) |
|
264
|
536 warning ("save: sorry, can't save read-only variable `%s'", nm); |
|
195
|
537 else if (is_function ()) |
|
264
|
538 warning ("save: sorry, can't save function `%s'", nm); |
|
265
|
539 else if (is_defined ()) |
|
111
|
540 { |
|
195
|
541 os << "# name: " << nm << "\n"; |
|
276
|
542 status = definition->save (os, mark_as_global, precision); |
|
111
|
543 } |
|
1
|
544 |
|
|
545 return status; |
|
|
546 } |
|
|
547 |
|
186
|
548 int |
|
195
|
549 symbol_record::clear (void) |
|
1
|
550 { |
|
195
|
551 int count = 0; |
|
|
552 if (linked_to_global) |
|
1
|
553 { |
|
195
|
554 count = maybe_delete (definition); |
|
530
|
555 definition = 0; |
|
195
|
556 linked_to_global = 0; |
|
1
|
557 } |
|
195
|
558 else |
|
|
559 { |
|
|
560 symbol_def *old_def = pop_def (); |
|
|
561 count = maybe_delete (old_def); |
|
|
562 } |
|
|
563 return count; |
|
1
|
564 } |
|
|
565 |
|
|
566 void |
|
530
|
567 symbol_record::alias (symbol_record *s, int force) |
|
1
|
568 { |
|
195
|
569 sv_fcn = s->sv_fcn; |
|
|
570 |
|
530
|
571 if (force && ! s->definition) |
|
1
|
572 { |
|
195
|
573 s->definition = new symbol_def (); |
|
|
574 definition = s->definition; |
|
|
575 definition->count = 2; // Yes, this is correct. |
|
1
|
576 } |
|
530
|
577 else if (s->definition) |
|
1
|
578 { |
|
195
|
579 definition = s->definition; |
|
|
580 definition->count++; |
|
1
|
581 } |
|
|
582 } |
|
|
583 |
|
|
584 void |
|
|
585 symbol_record::mark_as_formal_parameter (void) |
|
|
586 { |
|
|
587 formal_param = 1; |
|
|
588 } |
|
|
589 |
|
|
590 int |
|
164
|
591 symbol_record::is_formal_parameter (void) const |
|
1
|
592 { |
|
|
593 return formal_param; |
|
|
594 } |
|
|
595 |
|
|
596 void |
|
195
|
597 symbol_record::mark_as_linked_to_global (void) |
|
122
|
598 { |
|
195
|
599 linked_to_global = 1; |
|
122
|
600 } |
|
|
601 |
|
|
602 int |
|
195
|
603 symbol_record::is_linked_to_global (void) const |
|
1
|
604 { |
|
195
|
605 return linked_to_global; |
|
1
|
606 } |
|
|
607 |
|
|
608 symbol_record * |
|
164
|
609 symbol_record::next (void) const |
|
1
|
610 { |
|
|
611 return next_elem; |
|
|
612 } |
|
|
613 |
|
195
|
614 void |
|
|
615 symbol_record::chain (symbol_record *s) |
|
|
616 { |
|
|
617 next_elem = s; |
|
|
618 } |
|
|
619 |
|
220
|
620 void |
|
|
621 symbol_record::push_context (void) |
|
|
622 { |
|
|
623 context.push (definition); |
|
530
|
624 definition = 0; |
|
395
|
625 |
|
|
626 global_link_context.push ((unsigned) linked_to_global); |
|
|
627 linked_to_global = 0; |
|
220
|
628 } |
|
|
629 |
|
|
630 void |
|
|
631 symbol_record::pop_context (void) |
|
|
632 { |
|
|
633 assert (! context.empty ()); |
|
|
634 |
|
|
635 if (is_variable ()) |
|
|
636 { |
|
|
637 symbol_def *old_def = pop_def (); |
|
|
638 maybe_delete (old_def); |
|
|
639 } |
|
|
640 |
|
|
641 if (is_function ()) |
|
|
642 { |
|
|
643 symbol_def *old_def = pop_def (); |
|
|
644 maybe_delete (old_def); |
|
|
645 } |
|
|
646 |
|
|
647 definition = context.pop (); |
|
395
|
648 linked_to_global = global_link_context.pop (); |
|
220
|
649 } |
|
|
650 |
|
195
|
651 int |
|
|
652 symbol_record::read_only_error (void) |
|
|
653 { |
|
|
654 if (is_read_only ()) |
|
|
655 { |
|
|
656 char *tag = "symbol"; |
|
|
657 if (is_variable ()) |
|
|
658 tag = "variable"; |
|
|
659 else if (is_function ()) |
|
|
660 tag = "function"; |
|
|
661 |
|
240
|
662 ::error ("can't redefined read-only %s `%s'", tag, nm); |
|
195
|
663 |
|
|
664 return 1; |
|
|
665 } |
|
|
666 else |
|
|
667 return 0; |
|
|
668 } |
|
|
669 |
|
|
670 void |
|
|
671 symbol_record::push_def (symbol_def *sd) |
|
|
672 { |
|
530
|
673 if (! sd) |
|
195
|
674 return; |
|
|
675 |
|
|
676 sd->next_elem = definition; |
|
|
677 definition = sd; |
|
|
678 } |
|
|
679 |
|
|
680 symbol_def * |
|
|
681 symbol_record::pop_def (void) |
|
|
682 { |
|
|
683 symbol_def *top = definition; |
|
530
|
684 if (definition) |
|
195
|
685 definition = definition->next_elem; |
|
|
686 return top; |
|
|
687 } |
|
|
688 |
|
|
689 /* |
|
|
690 * A structure for handling verbose information about a symbol_record. |
|
|
691 */ |
|
|
692 |
|
|
693 symbol_record_info::symbol_record_info (void) |
|
|
694 { |
|
|
695 init_state (); |
|
|
696 } |
|
|
697 |
|
|
698 symbol_record_info::symbol_record_info (const symbol_record& sr) |
|
|
699 { |
|
|
700 init_state (); |
|
|
701 |
|
|
702 type = sr.type (); |
|
|
703 |
|
|
704 if (sr.is_variable () && sr.is_defined ()) |
|
|
705 { |
|
|
706 // Would be nice to avoid this cast. XXX FIXME XXX |
|
|
707 tree_constant *tmp = (tree_constant *) sr.def (); |
|
|
708 switch (tmp->const_type ()) |
|
|
709 { |
|
|
710 case tree_constant_rep::scalar_constant: |
|
|
711 const_type = SR_INFO_SCALAR; |
|
|
712 break; |
|
|
713 case tree_constant_rep::complex_scalar_constant: |
|
|
714 const_type = SR_INFO_COMPLEX_SCALAR; |
|
|
715 break; |
|
|
716 case tree_constant_rep::matrix_constant: |
|
|
717 const_type = SR_INFO_MATRIX; |
|
|
718 break; |
|
|
719 case tree_constant_rep::complex_matrix_constant: |
|
|
720 const_type = SR_INFO_COMPLEX_MATRIX; |
|
|
721 break; |
|
|
722 case tree_constant_rep::range_constant: |
|
|
723 const_type = SR_INFO_RANGE; |
|
|
724 break; |
|
|
725 case tree_constant_rep::string_constant: |
|
|
726 const_type = SR_INFO_STRING; |
|
|
727 break; |
|
|
728 default: |
|
|
729 break; |
|
|
730 } |
|
|
731 |
|
|
732 nr = tmp->rows (); |
|
|
733 nc = tmp->columns (); |
|
|
734 |
|
|
735 symbol_def *sr_def = sr.definition; |
|
|
736 symbol_def *hidden_def = sr_def->next_elem; |
|
530
|
737 if (hidden_def) |
|
195
|
738 { |
|
|
739 if (hidden_def->is_user_function ()) |
|
|
740 hides = SR_INFO_USER_FUNCTION; |
|
|
741 else if (hidden_def->is_builtin_function ()) |
|
|
742 hides = SR_INFO_BUILTIN_FUNCTION; |
|
|
743 } |
|
|
744 } |
|
|
745 |
|
|
746 eternal = sr.is_eternal (); |
|
|
747 read_only = sr.is_read_only (); |
|
|
748 |
|
|
749 nm = strsave (sr.name ()); |
|
|
750 |
|
|
751 initialized = 1; |
|
|
752 } |
|
|
753 |
|
|
754 symbol_record_info::symbol_record_info (const symbol_record_info& s) |
|
|
755 { |
|
|
756 type = s.type; |
|
|
757 const_type = s.const_type; |
|
|
758 hides = s.hides; |
|
|
759 eternal = s.eternal; |
|
|
760 read_only = s.read_only; |
|
|
761 nr = s.nr; |
|
|
762 nc = s.nc; |
|
|
763 nm = strsave (s.nm); |
|
|
764 initialized = s.initialized; |
|
|
765 } |
|
|
766 |
|
|
767 symbol_record_info::~symbol_record_info (void) |
|
|
768 { |
|
|
769 delete nm; |
|
|
770 } |
|
|
771 |
|
|
772 symbol_record_info& |
|
|
773 symbol_record_info::operator = (const symbol_record_info& s) |
|
|
774 { |
|
|
775 if (this != &s) |
|
|
776 { |
|
|
777 delete nm; |
|
|
778 type = s.type; |
|
|
779 const_type = s.const_type; |
|
|
780 hides = s.hides; |
|
|
781 eternal = s.eternal; |
|
|
782 read_only = s.read_only; |
|
|
783 nr = s.nr; |
|
|
784 nc = s.nc; |
|
|
785 nm = strsave (s.nm); |
|
|
786 initialized = s.initialized; |
|
|
787 } |
|
|
788 return *this; |
|
|
789 } |
|
|
790 |
|
|
791 int |
|
|
792 symbol_record_info::is_defined (void) const |
|
|
793 { |
|
|
794 return initialized; |
|
|
795 } |
|
|
796 |
|
|
797 int |
|
|
798 symbol_record_info::is_read_only (void) const |
|
|
799 { |
|
|
800 return read_only; |
|
|
801 } |
|
|
802 |
|
|
803 int |
|
|
804 symbol_record_info::is_eternal (void) const |
|
|
805 { |
|
|
806 return eternal; |
|
|
807 } |
|
|
808 |
|
|
809 int |
|
|
810 symbol_record_info::hides_fcn (void) const |
|
|
811 { |
|
|
812 return (hides & SR_INFO_USER_FUNCTION); |
|
|
813 } |
|
|
814 |
|
|
815 int |
|
|
816 symbol_record_info::hides_builtin (void) const |
|
|
817 { |
|
|
818 return (hides & SR_INFO_BUILTIN_FUNCTION); |
|
|
819 } |
|
|
820 |
|
|
821 char * |
|
|
822 symbol_record_info::type_as_string (void) const |
|
|
823 { |
|
|
824 if (type == symbol_def::USER_FUNCTION) |
|
|
825 return "user function"; |
|
|
826 else if (type == symbol_def::BUILTIN_FUNCTION) |
|
|
827 return "builtin function"; |
|
|
828 else |
|
|
829 { |
|
|
830 if (const_type == SR_INFO_SCALAR) |
|
|
831 return "real scalar"; |
|
|
832 else if (const_type == SR_INFO_COMPLEX_SCALAR) |
|
|
833 return "complex scalar"; |
|
|
834 else if (const_type == SR_INFO_MATRIX) |
|
|
835 return "real matrix"; |
|
|
836 else if (const_type == SR_INFO_COMPLEX_MATRIX) |
|
|
837 return "complex matrix"; |
|
|
838 else if (const_type == SR_INFO_RANGE) |
|
|
839 return "range"; |
|
|
840 else if (const_type == SR_INFO_STRING) |
|
|
841 return "string"; |
|
|
842 else |
|
|
843 return ""; |
|
|
844 } |
|
|
845 } |
|
|
846 |
|
|
847 int |
|
|
848 symbol_record_info::is_function (void) const |
|
|
849 { |
|
|
850 return (type == symbol_def::USER_FUNCTION |
|
|
851 || type == symbol_def::BUILTIN_FUNCTION); |
|
|
852 } |
|
|
853 |
|
|
854 int |
|
|
855 symbol_record_info::rows (void) const |
|
|
856 { |
|
|
857 return nr; |
|
|
858 } |
|
|
859 |
|
|
860 int |
|
|
861 symbol_record_info::columns (void) const |
|
|
862 { |
|
|
863 return nc; |
|
|
864 } |
|
|
865 |
|
|
866 char * |
|
|
867 symbol_record_info::name (void) const |
|
|
868 { |
|
|
869 return nm; |
|
|
870 } |
|
|
871 |
|
|
872 void |
|
|
873 symbol_record_info::init_state (void) |
|
|
874 { |
|
|
875 initialized = 0; |
|
|
876 type = symbol_def::UNKNOWN; |
|
|
877 const_type = SR_INFO_UNKNOWN; |
|
|
878 hides = SR_INFO_NONE; |
|
|
879 eternal = 0; |
|
|
880 read_only = 0; |
|
|
881 nr = -1; |
|
|
882 nc = -1; |
|
530
|
883 nm = 0; |
|
195
|
884 } |
|
|
885 |
|
1
|
886 /* |
|
|
887 * A symbol table. |
|
|
888 */ |
|
|
889 |
|
|
890 symbol_table::symbol_table (void) |
|
|
891 { |
|
|
892 } |
|
|
893 |
|
|
894 symbol_record * |
|
530
|
895 symbol_table::lookup (const char *nm, int insert, int warn) |
|
1
|
896 { |
|
|
897 int index = hash (nm) & HASH_MASK; |
|
|
898 |
|
|
899 symbol_record *ptr = table[index].next (); |
|
|
900 |
|
530
|
901 while (ptr) |
|
1
|
902 { |
|
|
903 if (strcmp (ptr->name (), nm) == 0) |
|
|
904 return ptr; |
|
|
905 ptr = ptr->next (); |
|
|
906 } |
|
|
907 |
|
|
908 if (insert) |
|
|
909 { |
|
|
910 symbol_record *new_sym; |
|
|
911 new_sym = new symbol_record (nm, table[index].next ()); |
|
195
|
912 table[index].chain (new_sym); |
|
1
|
913 return new_sym; |
|
|
914 } |
|
|
915 else if (warn) |
|
217
|
916 warning ("lookup: symbol`%s' not found", nm); |
|
1
|
917 |
|
530
|
918 return 0; |
|
1
|
919 } |
|
|
920 |
|
|
921 void |
|
572
|
922 symbol_table::rename (const char *old_name, const char *new_name) |
|
|
923 { |
|
|
924 int index = hash (old_name) & HASH_MASK; |
|
|
925 |
|
|
926 symbol_record *prev = &table[index]; |
|
|
927 symbol_record *ptr = prev->next (); |
|
|
928 |
|
|
929 while (ptr) |
|
|
930 { |
|
|
931 if (strcmp (ptr->name (), old_name) == 0) |
|
|
932 { |
|
|
933 prev->chain (ptr->next ()); |
|
|
934 |
|
|
935 index = hash (new_name) & HASH_MASK; |
|
|
936 table[index].chain (ptr); |
|
|
937 ptr->rename (new_name); |
|
|
938 |
|
|
939 return; |
|
|
940 } |
|
|
941 |
|
|
942 prev = ptr; |
|
|
943 ptr = ptr->next (); |
|
|
944 } |
|
|
945 |
|
|
946 panic_impossible (); |
|
|
947 } |
|
|
948 |
|
|
949 void |
|
530
|
950 symbol_table::clear (int clear_user_functions) |
|
1
|
951 { |
|
|
952 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
953 { |
|
169
|
954 symbol_record *ptr = table[i].next (); |
|
1
|
955 |
|
530
|
956 while (ptr) |
|
169
|
957 { |
|
195
|
958 if (ptr->is_user_variable () |
|
|
959 || (clear_user_functions && ptr->is_user_function ())) |
|
|
960 { |
|
|
961 ptr->clear (); |
|
|
962 } |
|
|
963 |
|
169
|
964 ptr = ptr->next (); |
|
1
|
965 } |
|
|
966 } |
|
|
967 } |
|
|
968 |
|
|
969 int |
|
530
|
970 symbol_table::clear (const char *nm, int clear_user_functions) |
|
1
|
971 { |
|
|
972 int index = hash (nm) & HASH_MASK; |
|
|
973 |
|
195
|
974 symbol_record *ptr = table[index].next (); |
|
1
|
975 |
|
530
|
976 while (ptr) |
|
1
|
977 { |
|
195
|
978 if (strcmp (ptr->name (), nm) == 0 |
|
|
979 && (ptr->is_user_variable () |
|
|
980 || (clear_user_functions && ptr->is_user_function ()))) |
|
1
|
981 { |
|
195
|
982 ptr->clear (); |
|
|
983 return 1; |
|
1
|
984 } |
|
195
|
985 ptr = ptr->next (); |
|
1
|
986 } |
|
|
987 |
|
|
988 return 0; |
|
|
989 } |
|
|
990 |
|
|
991 int |
|
530
|
992 symbol_table::save (ostream& os, int mark_as_global, int precision) |
|
1
|
993 { |
|
|
994 int status = 0; |
|
195
|
995 int count; |
|
|
996 char **names = list (count, 1, symbol_def::USER_VARIABLE); |
|
200
|
997 char **ptr = names; |
|
530
|
998 if (ptr) |
|
1
|
999 { |
|
530
|
1000 while (*ptr) |
|
111
|
1001 { |
|
276
|
1002 if (save (os, *ptr, mark_as_global, precision)) |
|
111
|
1003 status++; |
|
244
|
1004 delete [] *ptr++; |
|
111
|
1005 } |
|
200
|
1006 delete [] names; |
|
1
|
1007 } |
|
|
1008 return status; |
|
|
1009 } |
|
|
1010 |
|
|
1011 int |
|
530
|
1012 symbol_table::save (ostream& os, const char *name, int mark_as_global, |
|
|
1013 int precision) |
|
1
|
1014 { |
|
|
1015 int status = 0; |
|
|
1016 symbol_record *sr = lookup (name, 0, 0); |
|
530
|
1017 if (sr) |
|
276
|
1018 status = sr->save (os, mark_as_global, precision); |
|
1
|
1019 return status; |
|
|
1020 } |
|
|
1021 |
|
|
1022 int |
|
164
|
1023 symbol_table::size (void) const |
|
1
|
1024 { |
|
|
1025 int count = 0; |
|
|
1026 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1027 { |
|
|
1028 symbol_record *ptr = table[i].next (); |
|
530
|
1029 while (ptr) |
|
1
|
1030 { |
|
|
1031 count++; |
|
|
1032 ptr = ptr->next (); |
|
|
1033 } |
|
|
1034 } |
|
|
1035 return count; |
|
|
1036 } |
|
|
1037 |
|
195
|
1038 static inline int |
|
|
1039 pstrcmp (char **a, char **b) |
|
1
|
1040 { |
|
195
|
1041 return strcmp (*a, *b); |
|
1
|
1042 } |
|
|
1043 |
|
195
|
1044 static inline int |
|
|
1045 symbol_record_info_cmp (symbol_record_info *a, symbol_record_info *b) |
|
1
|
1046 { |
|
195
|
1047 return strcmp (a->name (), b->name ()); |
|
1
|
1048 } |
|
|
1049 |
|
195
|
1050 // This function should probably share code with symbol_table::list. |
|
|
1051 // XXX FIXME XXX |
|
1
|
1052 |
|
195
|
1053 symbol_record_info * |
|
530
|
1054 symbol_table::long_list (int& count, int sort, unsigned type, |
|
|
1055 unsigned scope) const |
|
1
|
1056 { |
|
115
|
1057 count = 0; |
|
1
|
1058 int n = size (); |
|
|
1059 if (n == 0) |
|
530
|
1060 return 0; |
|
1
|
1061 |
|
195
|
1062 symbol_record_info *symbols = new symbol_record_info [n+1]; |
|
1
|
1063 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1064 { |
|
|
1065 symbol_record *ptr = table[i].next (); |
|
530
|
1066 while (ptr) |
|
1
|
1067 { |
|
|
1068 assert (count < n); |
|
195
|
1069 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1070 unsigned my_type = ptr->type (); |
|
|
1071 if ((type & my_type) && (scope & my_scope)) |
|
|
1072 { |
|
|
1073 symbols[count++] = symbol_record_info (*ptr); |
|
|
1074 } |
|
1
|
1075 ptr = ptr->next (); |
|
|
1076 } |
|
|
1077 } |
|
195
|
1078 symbols[count] = symbol_record_info (); |
|
|
1079 |
|
530
|
1080 if (sort && symbols) |
|
195
|
1081 qsort ((void *) symbols, count, sizeof (symbol_record_info), |
|
530
|
1082 (int (*)(const void*, const void*)) symbol_record_info_cmp); |
|
195
|
1083 |
|
1
|
1084 return symbols; |
|
|
1085 } |
|
|
1086 |
|
|
1087 char ** |
|
530
|
1088 symbol_table::list (int& count, int sort, unsigned type, |
|
|
1089 unsigned scope) const |
|
1
|
1090 { |
|
115
|
1091 count = 0; |
|
1
|
1092 int n = size (); |
|
|
1093 if (n == 0) |
|
530
|
1094 return 0; |
|
1
|
1095 |
|
|
1096 char **symbols = new char * [n+1]; |
|
|
1097 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1098 { |
|
|
1099 symbol_record *ptr = table[i].next (); |
|
530
|
1100 while (ptr) |
|
1
|
1101 { |
|
|
1102 assert (count < n); |
|
195
|
1103 unsigned my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
|
1104 unsigned my_type = ptr->type (); |
|
|
1105 if ((type & my_type) && (scope & my_scope)) |
|
1
|
1106 symbols[count++] = strsave (ptr->name ()); |
|
|
1107 ptr = ptr->next (); |
|
|
1108 } |
|
|
1109 } |
|
530
|
1110 symbols[count] = 0; |
|
1
|
1111 |
|
530
|
1112 if (sort && symbols) |
|
1
|
1113 qsort ((void **) symbols, count, sizeof (char *), |
|
530
|
1114 (int (*)(const void*, const void*)) pstrcmp); |
|
1
|
1115 |
|
|
1116 return symbols; |
|
|
1117 } |
|
|
1118 |
|
220
|
1119 void |
|
|
1120 symbol_table::push_context (void) |
|
|
1121 { |
|
|
1122 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1123 { |
|
|
1124 symbol_record *ptr = table[i].next (); |
|
|
1125 |
|
530
|
1126 while (ptr) |
|
220
|
1127 { |
|
|
1128 ptr->push_context (); |
|
|
1129 ptr = ptr->next (); |
|
|
1130 } |
|
|
1131 } |
|
|
1132 } |
|
|
1133 |
|
|
1134 void |
|
|
1135 symbol_table::pop_context (void) |
|
|
1136 { |
|
|
1137 for (int i = 0; i < HASH_TABLE_SIZE; i++) |
|
|
1138 { |
|
|
1139 symbol_record *ptr = table[i].next (); |
|
|
1140 |
|
530
|
1141 while (ptr) |
|
220
|
1142 { |
|
|
1143 ptr->pop_context (); |
|
|
1144 ptr = ptr->next (); |
|
|
1145 } |
|
|
1146 } |
|
|
1147 } |
|
|
1148 |
|
1
|
1149 // Chris Torek's fave hash function. |
|
|
1150 |
|
|
1151 unsigned int |
|
|
1152 symbol_table::hash (const char *str) |
|
|
1153 { |
|
|
1154 unsigned h = 0; |
|
|
1155 while (*str) |
|
|
1156 h = h * 33 + *str++; |
|
|
1157 return h; |
|
|
1158 } |
|
|
1159 |
|
|
1160 /* |
|
|
1161 ;;; Local Variables: *** |
|
|
1162 ;;; mode: C++ *** |
|
|
1163 ;;; page-delimiter: "^/\\*" *** |
|
|
1164 ;;; End: *** |
|
|
1165 */ |
