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1 // symtab.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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383
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24 #if !defined (octave_symtab_h) |
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25 #define octave_symtab_h 1 |
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26 |
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27 #if defined (__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 "SLStack.h" |
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32 |
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33 #include "variables.h" |
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34 |
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35 class ostream; |
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36 |
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37 // Must be multiple of 2. |
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38 #define HASH_TABLE_SIZE 1024 |
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39 #define HASH_MASK (HASH_TABLE_SIZE - 1) |
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40 |
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41 class tree; |
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42 class tree_fvc; |
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43 class tree_builtin; |
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44 class tree_constant; |
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45 class tree_function; |
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46 |
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47 class symbol_def; |
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48 class symbol_record; |
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49 class symbol_record_info; |
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50 class symbol_table; |
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51 |
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52 // Variables or functions. |
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53 |
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54 class symbol_def |
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55 { |
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56 friend class symbol_record; |
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57 friend class symbol_record_info; |
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58 |
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59 public: |
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60 |
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61 symbol_def (void); |
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62 symbol_def (tree_constant *t); |
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63 symbol_def (tree_builtin *t, unsigned fcn_type = 0); |
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64 symbol_def (tree_function *t, unsigned fcn_type = 0); |
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65 |
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66 ~symbol_def (void); |
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67 |
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68 int is_variable (void) const; |
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69 int is_function (void) const; |
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70 int is_text_function (void) const; |
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71 int is_mapper_function (void) const; |
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72 int is_user_variable (void) const; |
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73 int is_user_function (void) const; |
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74 int is_builtin_variable (void) const; |
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75 int is_builtin_function (void) const; |
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76 |
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77 void define (tree_constant *t); |
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78 void define (tree_builtin *t, unsigned fcn_type = 0); |
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79 void define (tree_function *t, unsigned fcn_type = 0); |
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80 |
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81 void protect (void); |
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82 void unprotect (void); |
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83 void make_eternal (void); |
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84 |
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85 tree_fvc *def (void) const; |
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86 char *help (void) const; |
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87 void document (const char *h); |
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88 |
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89 enum TYPE |
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90 { |
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91 UNKNOWN = 0, |
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92 USER_FUNCTION = 1, |
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93 USER_VARIABLE = 2, |
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94 BUILTIN_FUNCTION = 4, |
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95 TEXT_FUNCTION = 8, |
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96 MAPPER_FUNCTION = 16, |
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97 BUILTIN_VARIABLE = 32 |
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98 }; |
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99 |
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100 friend maybe_delete (symbol_def *def); |
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101 |
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102 private: |
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103 |
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104 unsigned type : 6; |
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105 unsigned eternal : 1; |
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106 unsigned read_only : 1; |
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107 |
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108 char *help_string; |
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109 tree_fvc *definition; |
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110 symbol_def *next_elem; |
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111 int count; |
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112 |
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113 void init_state (void); |
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114 |
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115 symbol_def (const symbol_def& sd); |
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116 symbol_def& operator = (const symbol_def& sd); |
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117 }; |
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118 |
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119 // Individual records in a symbol table. |
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120 |
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121 class |
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122 symbol_record |
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123 { |
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124 friend class symbol_record_info; |
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125 |
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126 public: |
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127 symbol_record (void); |
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128 symbol_record (const char *n, symbol_record *nxt = 0); |
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129 |
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130 ~symbol_record (void); |
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131 |
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132 char *name (void) const; |
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133 char *help (void) const; |
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134 tree_fvc *def (void) const; |
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135 |
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136 void rename (const char *new_name); |
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137 |
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138 int is_function (void) const; |
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139 int is_user_function (void) const; |
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140 int is_text_function (void) const; |
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141 int is_mapper_function (void) const; |
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142 int is_builtin_function (void) const; |
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143 int is_variable (void) const; |
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144 int is_user_variable (void) const; |
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145 int is_builtin_variable (void) const; |
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146 |
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147 unsigned type (void) const; |
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148 |
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149 int is_defined (void) const; |
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150 int is_read_only (void) const; |
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151 int is_eternal (void) const; |
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152 |
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153 void protect (void); |
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154 void unprotect (void); |
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155 void make_eternal (void); |
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156 |
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157 void set_sv_function (sv_Function f); |
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158 |
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159 int define (tree_constant *t); |
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160 int define (tree_builtin *t, int text_fcn = 0); |
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161 int define (tree_function *t, int text_fcn = 0); |
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162 int define_as_fcn (tree_constant *t); |
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163 int define_builtin_var (tree_constant *t); |
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164 |
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165 void document (const char *h); |
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166 |
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167 int clear (void); |
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168 |
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169 void alias (symbol_record *s, int force = 0); |
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170 |
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171 void mark_as_formal_parameter (void); |
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172 int is_formal_parameter (void) const; |
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173 |
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174 void mark_as_linked_to_global (void); |
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175 int is_linked_to_global (void) const; |
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176 |
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177 symbol_record *next (void) const; |
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178 |
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179 void chain (symbol_record *s); |
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180 |
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181 void push_context (void); |
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182 void pop_context (void); |
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183 |
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184 private: |
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185 |
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186 unsigned formal_param : 1; |
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187 unsigned linked_to_global : 1; |
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188 |
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189 char *nm; |
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190 sv_Function sv_fcn; |
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191 symbol_def *definition; |
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192 symbol_record *next_elem; |
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193 |
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194 // This should maybe be one stack with a structure containing all the |
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195 // items we need to save for recursive calls... |
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196 SLStack <symbol_def *> context; |
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197 SLStack <unsigned> global_link_context; |
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198 |
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199 void init_state (void); |
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200 |
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201 int read_only_error (void); |
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202 |
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203 void push_def (symbol_def *sd); |
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204 symbol_def *pop_def (void); |
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205 |
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206 symbol_record& operator = (const symbol_record& s); |
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207 }; |
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208 |
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209 // A structure for handling verbose information about a symbol_record. |
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210 |
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211 class |
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212 symbol_record_info |
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213 { |
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214 public: |
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215 |
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216 symbol_record_info (void); |
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217 symbol_record_info (const symbol_record& s); |
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218 |
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219 symbol_record_info (const symbol_record_info& s); |
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220 |
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221 ~symbol_record_info (void); |
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222 |
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223 symbol_record_info& operator = (const symbol_record_info& s); |
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224 |
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225 int is_defined (void) const; |
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226 int is_read_only (void) const; |
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227 int is_eternal (void) const; |
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228 int hides_fcn (void) const; |
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229 int hides_builtin (void) const; |
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230 char *type_as_string (void) const; |
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231 int is_function (void) const; |
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232 int rows (void) const; |
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233 int columns (void) const; |
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234 char *name (void) const; |
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235 |
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236 enum HIDES |
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237 { |
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238 SR_INFO_NONE = 0, |
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239 SR_INFO_USER_FUNCTION = 1, |
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240 SR_INFO_BUILTIN_FUNCTION = 2 |
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241 }; |
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242 |
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243 enum CONST_TYPE |
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244 { |
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245 SR_INFO_UNKNOWN = 0, |
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246 SR_INFO_SCALAR = 1, |
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247 SR_INFO_COMPLEX_SCALAR = 2, |
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248 SR_INFO_MATRIX = 4, |
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249 SR_INFO_COMPLEX_MATRIX = 8, |
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250 SR_INFO_RANGE = 16, |
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251 SR_INFO_STRING = 32 |
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252 }; |
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253 |
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254 private: |
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255 |
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256 void init_state (void); |
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257 |
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258 unsigned type : 4; |
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259 unsigned const_type : 6; |
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260 unsigned hides : 2; |
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261 unsigned eternal : 1; |
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262 unsigned read_only : 1; |
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263 int nr; |
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264 int nc; |
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265 char *nm; |
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266 |
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267 int initialized; |
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268 }; |
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269 |
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270 // A symbol table. |
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271 |
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272 #define SYMTAB_LOCAL_SCOPE 1 |
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273 #define SYMTAB_GLOBAL_SCOPE 2 |
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274 |
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275 #define SYMTAB_ALL_SCOPES (SYMTAB_LOCAL_SCOPE | SYMTAB_GLOBAL_SCOPE) |
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276 |
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277 #define SYMTAB_ALL_TYPES (symbol_def::USER_FUNCTION \ |
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278 | symbol_def::USER_VARIABLE \ |
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279 | symbol_def::BUILTIN_FUNCTION \ |
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280 | symbol_def::TEXT_FUNCTION \ |
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281 | symbol_def::MAPPER_FUNCTION \ |
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282 | symbol_def::BUILTIN_VARIABLE) |
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283 |
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284 class |
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285 symbol_table |
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286 { |
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287 public: |
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288 |
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289 symbol_table (void); |
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290 |
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291 symbol_record *lookup (const char *nm, int insert = 0, int warn = 0); |
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292 |
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293 void rename (const char *old_name, const char *new_name); |
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294 |
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295 void clear (int clear_user_functions = 1); |
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296 int clear (const char *nm, int clear_user_functions = 1); |
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297 |
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298 int size (void) const; |
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299 |
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300 symbol_record_info *long_list (int& count, char **pats = 0, |
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301 int npats = 0, int sort = 0, |
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302 unsigned type = SYMTAB_ALL_TYPES, |
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303 unsigned scope = SYMTAB_ALL_SCOPES) const; |
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304 |
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305 char **list (int& count, char **pats = 0, int npats = 0, |
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306 int sort = 0, unsigned type = SYMTAB_ALL_TYPES, |
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307 unsigned scope = SYMTAB_ALL_SCOPES) const; |
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308 |
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309 symbol_record **glob (int& count, char *pat = "*", |
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310 unsigned type = SYMTAB_ALL_TYPES, |
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311 unsigned scope = SYMTAB_ALL_SCOPES) const; |
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312 |
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313 void push_context (void); |
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314 void pop_context (void); |
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315 |
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316 private: |
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317 |
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318 unsigned int hash (const char *s); |
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319 |
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320 symbol_record table[HASH_TABLE_SIZE]; |
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321 }; |
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322 |
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323 #endif |
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324 |
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325 /* |
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326 ;;; Local Variables: *** |
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327 ;;; mode: C++ *** |
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328 ;;; page-delimiter: "^/\\*" *** |
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329 ;;; End: *** |
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330 */ |
