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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_variables_h) |
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24 #define octave_variables_h 1 |
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25 |
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26 class symbol_record; |
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27 class symbol_table; |
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28 |
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29 class tree_fvc; |
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30 class tree_identifier; |
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31 class tree_indirect_ref; |
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32 class octave_value; |
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33 class octave_value_list; |
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34 class string_vector; |
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35 |
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36 #include <string> |
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37 |
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38 #include "ov.h" |
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39 |
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40 struct builtin_mapper_function; |
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41 |
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42 typedef int (*sv_Function)(void); |
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43 |
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44 struct builtin_variable |
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45 { |
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46 builtin_variable (const string& n, const octave_value& v, int iaf, int p, |
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47 int e, sv_Function svf, const string& h) |
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48 : name (n), value (v), install_as_function (iaf), protect (p), |
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49 eternal (e), sv_function (svf), help_string (h) { } |
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50 |
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51 string name; |
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52 octave_value value; |
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53 int install_as_function; |
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54 int protect; |
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55 int eternal; |
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56 sv_Function sv_function; |
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57 string help_string; |
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58 }; |
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59 |
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60 class |
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61 octave_variable_reference |
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62 { |
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63 public: |
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64 |
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65 octave_variable_reference (tree_identifier *i) : id (i), indir (0) { } |
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66 |
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67 octave_variable_reference (tree_indirect_ref *i); |
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68 |
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69 ~octave_variable_reference (void) { } |
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70 |
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71 void assign (const octave_value&); |
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72 |
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73 void assign (const octave_value_list&, const octave_value&); |
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74 |
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75 octave_value value (void); |
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76 |
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77 private: |
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78 |
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79 tree_identifier *id; |
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80 |
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81 tree_indirect_ref *indir; |
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82 |
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83 // No copying! |
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84 |
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85 octave_variable_reference (const octave_variable_reference&); |
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86 |
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87 octave_variable_reference& operator = (const octave_variable_reference&); |
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88 }; |
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89 |
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90 typedef octave_value_list (*Octave_builtin_fcn)(const octave_value_list&, int); |
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91 |
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92 struct builtin_function |
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93 { |
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94 builtin_function (const string& n, int itf, Octave_builtin_fcn f, |
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95 const string& h) |
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96 : name (n), is_text_fcn (itf), fcn (f), help_string (h) { } |
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97 |
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98 string name; |
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99 int is_text_fcn; |
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100 Octave_builtin_fcn fcn; |
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101 string help_string; |
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102 }; |
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103 |
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104 extern void initialize_symbol_tables (void); |
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105 |
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106 extern bool lookup (symbol_record *s, int exec_script = 1); |
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107 |
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108 extern symbol_record *lookup_by_name (const string& nm, int exec_script = 1); |
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109 |
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110 extern octave_value get_global_value (const string& nm); |
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111 |
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112 extern void set_global_value (const string& nm, const octave_value& val); |
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113 |
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114 extern string get_help_from_file (const string& f); |
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115 |
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116 extern string builtin_string_variable (const string&); |
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117 extern int builtin_real_scalar_variable (const string&, double&); |
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118 extern octave_value builtin_any_variable (const string&); |
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119 |
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120 extern void link_to_global_variable (symbol_record *sr); |
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121 extern void link_to_builtin_variable (symbol_record *sr); |
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122 extern void link_to_builtin_or_function (symbol_record *sr); |
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123 |
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124 extern void force_link_to_function (const string&); |
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125 |
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126 extern bool is_builtin_variable (const string&); |
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127 extern bool is_text_function_name (const string&); |
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128 extern bool is_mapper_function_name (const string&); |
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129 extern bool is_builtin_function_name (const string&); |
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130 extern bool is_globally_visible (const string&); |
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131 |
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132 extern tree_fvc *is_valid_function (const octave_value&, const string&, |
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133 int warn = 0); |
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134 |
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135 tree_fvc *extract_function (const octave_value& arg, const string& warn_for, |
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136 const string& fname, const string& header, |
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137 const string& trailer); |
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138 |
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139 extern string_vector make_name_list (void); |
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140 |
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141 extern void install_builtin_mapper (const builtin_mapper_function& mf); |
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142 |
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143 extern void install_builtin_function (const builtin_function& gf); |
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144 |
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145 extern void install_builtin_variable (const builtin_variable& v); |
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146 |
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147 extern void |
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148 install_builtin_variable_as_function (const string& name, |
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149 const octave_value& val, |
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150 int protect = 0, int eternal = 0, |
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151 const string& help = string ()); |
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152 |
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153 extern void alias_builtin (const string& alias, const string& name); |
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154 |
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155 extern void bind_ans (const octave_value& val, int print); |
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156 |
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157 extern void bind_global_error_variable (void); |
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158 |
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159 extern void clear_global_error_variable (void *); |
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160 |
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161 extern void bind_builtin_variable (const string&, const octave_value&, |
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162 int protect = 0, int eternal = 0, |
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163 sv_Function f = (sv_Function) 0, |
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164 const string& help = string ()); |
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165 |
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166 extern void install_builtin_variables (void); |
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167 |
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168 // Symbol table for symbols at the top level. |
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169 extern symbol_table *top_level_sym_tab; |
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170 |
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171 // Symbol table for the current scope. |
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172 extern symbol_table *curr_sym_tab; |
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173 |
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174 // Symbol table for global symbols. |
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175 extern symbol_table *global_sym_tab; |
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176 |
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177 enum echo_state |
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178 { |
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179 ECHO_OFF = 0, |
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180 ECHO_SCRIPTS = 1, |
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181 ECHO_FUNCTIONS = 2, |
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182 ECHO_CMD_LINE = 4 |
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183 }; |
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184 |
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185 extern int Vecho_executing_commands; |
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186 |
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187 #endif |
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188 |
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189 /* |
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190 ;;; Local Variables: *** |
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191 ;;; mode: C++ *** |
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192 ;;; End: *** |
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193 */ |
