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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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24 #if !defined (_symtab_h) |
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25 #define _symtab_h 1 |
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26 |
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27 #ifdef __GNUG__ |
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28 #pragma interface |
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29 #endif |
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30 |
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31 #include <stdlib.h> |
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32 #include <string.h> |
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33 #include <iostream.h> |
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34 #include <assert.h> |
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35 |
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36 #ifndef SV_FUNCTION_TYPEDEFS |
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37 #define SV_FUNCTION_TYPEDEFS 1 |
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38 |
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39 typedef int (*sv_Function)(void); |
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40 |
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41 #endif |
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42 |
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43 #define HASH_TABLE_SIZE 1024 /* Must be multiple of 2 */ |
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44 #define HASH_MASK (HASH_TABLE_SIZE - 1) |
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45 |
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46 class tree; |
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47 class tree_builtin; |
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48 class tree_constant; |
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49 class tree_function; |
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50 |
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51 class symbol_def; |
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52 class symbol_record; |
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53 class symbol_record_info; |
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54 class symbol_table; |
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55 |
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56 /* |
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57 * Variables or functions. |
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58 */ |
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59 class symbol_def |
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60 { |
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61 friend class symbol_record; |
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195
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62 friend class symbol_record_info; |
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63 |
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64 public: |
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65 |
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66 symbol_def (void); |
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67 symbol_def (tree_constant *t); |
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68 symbol_def (tree_builtin *t); |
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69 symbol_def (tree_function *t); |
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70 |
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71 ~symbol_def (void); |
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72 |
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195
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73 int is_variable (void) const; |
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74 int is_function (void) const; |
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75 int is_user_variable (void) const; |
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76 int is_user_function (void) const; |
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77 int is_builtin_variable (void) const; |
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78 int is_builtin_function (void) const; |
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79 |
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80 void define (tree_constant *t); |
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81 void define (tree_builtin *t); |
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82 void define (tree_function *t); |
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83 |
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195
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84 void protect (void); |
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85 void unprotect (void); |
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86 void make_eternal (void); |
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87 |
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88 tree *def (void) const; |
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89 char *help (void) const; |
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90 void document (const char *h); |
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91 |
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92 int save (ostream& os, int mark_as_global); |
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93 |
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195
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94 enum TYPE |
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95 { |
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96 UNKNOWN = 0, |
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97 USER_FUNCTION = 1, |
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98 USER_VARIABLE = 2, |
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99 BUILTIN_FUNCTION = 4, |
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100 BUILTIN_VARIABLE = 8 |
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101 }; |
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102 |
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103 friend maybe_delete (symbol_def *def); |
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104 |
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105 private: |
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106 |
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107 unsigned type : 4; |
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108 unsigned eternal : 1; |
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109 unsigned read_only : 1; |
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110 |
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111 char *help_string; |
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112 tree *definition; |
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195
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113 symbol_def *next_elem; |
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114 int count; |
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195
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115 |
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116 void init_state (void); |
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117 |
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118 symbol_def (const symbol_def& sd); |
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119 symbol_def& operator = (const symbol_def& sd); |
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120 }; |
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121 |
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122 /* |
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123 * Individual records in a symbol table. |
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124 */ |
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125 class |
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126 symbol_record |
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127 { |
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128 friend class symbol_record_info; |
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129 |
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130 public: |
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131 symbol_record (void); |
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132 symbol_record (const char *n, symbol_record *nxt = (symbol_record *) NULL); |
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133 |
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134 ~symbol_record (void); |
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135 |
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136 char *name (void) const; |
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137 char *help (void) const; |
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138 tree *def (void) const; |
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139 |
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195
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140 void rename (const char *n); |
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141 |
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142 int is_function (void) const; |
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143 int is_user_function (void) const; |
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144 int is_builtin_function (void) const; |
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145 int is_variable (void) const; |
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146 int is_user_variable (void) const; |
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147 int is_builtin_variable (void) const; |
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148 |
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149 unsigned type (void) const; |
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150 |
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151 int is_defined (void) const; |
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152 int is_read_only (void) const; |
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153 int is_eternal (void) const; |
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154 |
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155 void protect (void); |
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156 void unprotect (void); |
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157 void make_eternal (void); |
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158 |
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159 void set_sv_function (sv_Function f); |
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160 |
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161 int define (tree_constant *t); |
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162 int define (tree_builtin *t); |
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163 int define (tree_function *t); |
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164 int define_as_fcn (tree_constant *t); |
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165 int define_builtin_var (tree_constant *t); |
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166 |
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167 void document (const char *h); |
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168 |
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169 int save (ostream& os, int mark_as_global = 0); |
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170 |
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171 int clear (void); |
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172 |
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173 void alias (symbol_record *s, int force = 0); |
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174 |
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175 void mark_as_formal_parameter (void); |
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176 int is_formal_parameter (void) const; |
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177 |
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178 void mark_as_linked_to_global (void); |
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179 int is_linked_to_global (void) const; |
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180 |
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181 symbol_record *next (void) const; |
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182 |
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183 void chain (symbol_record *s); |
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184 |
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185 private: |
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186 |
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187 unsigned formal_param : 1; |
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188 unsigned linked_to_global : 1; |
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189 |
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190 char *nm; |
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191 sv_Function sv_fcn; |
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192 symbol_def *definition; |
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193 symbol_record *next_elem; |
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194 |
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195
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195 void init_state (void); |
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196 |
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197 int read_only_error (void); |
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198 |
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199 void push_def (symbol_def *sd); |
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200 symbol_def *pop_def (void); |
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201 |
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202 symbol_record& operator = (const symbol_record& s); |
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203 }; |
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204 |
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205 /* |
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206 * A structure for handling verbose information about a symbol_record. |
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207 */ |
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208 |
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209 class |
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210 symbol_record_info |
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211 { |
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212 public: |
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213 |
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214 symbol_record_info (void); |
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215 symbol_record_info (const symbol_record& s); |
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216 |
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217 symbol_record_info (const symbol_record_info& s); |
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218 |
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219 ~symbol_record_info (void); |
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220 |
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221 symbol_record_info& operator = (const symbol_record_info& s); |
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222 |
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223 int is_defined (void) const; |
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224 int is_read_only (void) const; |
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225 int is_eternal (void) const; |
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226 int hides_fcn (void) const; |
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227 int hides_builtin (void) const; |
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228 char *type_as_string (void) const; |
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229 int is_function (void) const; |
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230 int rows (void) const; |
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231 int columns (void) const; |
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232 char *name (void) const; |
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233 |
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234 enum HIDES |
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235 { |
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236 SR_INFO_NONE = 0, |
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237 SR_INFO_USER_FUNCTION = 1, |
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238 SR_INFO_BUILTIN_FUNCTION = 2 |
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239 }; |
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240 |
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241 enum CONST_TYPE |
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242 { |
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243 SR_INFO_UNKNOWN = 0, |
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244 SR_INFO_SCALAR = 1, |
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245 SR_INFO_COMPLEX_SCALAR = 2, |
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246 SR_INFO_MATRIX = 4, |
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247 SR_INFO_COMPLEX_MATRIX = 8, |
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248 SR_INFO_RANGE = 16, |
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249 SR_INFO_STRING = 32 |
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250 }; |
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251 |
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252 private: |
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253 |
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254 void init_state (void); |
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255 |
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256 unsigned type : 4; |
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257 unsigned const_type : 6; |
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258 unsigned hides : 2; |
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259 unsigned eternal : 1; |
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260 unsigned read_only : 1; |
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261 int nr; |
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262 int nc; |
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263 char *nm; |
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264 |
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265 int initialized; |
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266 }; |
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267 |
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268 /* |
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269 * A symbol table. |
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270 */ |
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271 class |
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272 symbol_table |
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273 { |
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274 public: |
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275 |
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276 symbol_table (void); |
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277 |
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278 symbol_record *lookup (const char *nm, int insert = 0, int warn = 0); |
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279 |
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280 void clear (int clear_user_functions = 1); |
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281 int clear (const char *nm, int clear_user_functions = 1); |
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282 |
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283 int save (ostream& os, int mark_as_global = 0); |
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284 int save (ostream& os, const char *name, int mark_as_global = 0); |
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285 |
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286 int size (void) const; |
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287 |
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288 #define SYMTAB_LOCAL_SCOPE 1 |
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289 #define SYMTAB_GLOBAL_SCOPE 2 |
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290 |
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291 #define SYMTAB_ALL_SCOPES (SYMTAB_LOCAL_SCOPE | SYMTAB_GLOBAL_SCOPE) |
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292 |
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293 #define SYMTAB_ALL_TYPES (symbol_def::USER_FUNCTION \ |
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294 | symbol_def::USER_VARIABLE \ |
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295 | symbol_def::BUILTIN_FUNCTION \ |
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296 | symbol_def::BUILTIN_VARIABLE) |
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297 |
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298 symbol_record_info *long_list (int& count, int sort = 0, |
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299 unsigned type = SYMTAB_ALL_TYPES, |
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300 unsigned scope = SYMTAB_ALL_SCOPES) const; |
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301 |
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302 char **list (int& count, int sort = 0, |
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303 unsigned type = SYMTAB_ALL_TYPES, |
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304 unsigned scope = SYMTAB_ALL_SCOPES) const; |
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305 |
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306 private: |
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307 |
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308 unsigned int hash (const char *s); |
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309 |
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310 symbol_record table[HASH_TABLE_SIZE]; |
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311 }; |
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312 |
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313 #endif |
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314 |
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315 /* |
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316 ;;; Local Variables: *** |
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317 ;;; mode: C++ *** |
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318 ;;; page-delimiter: "^/\\*" *** |
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319 ;;; End: *** |
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320 */ |
