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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_user_function_h) |
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24 #define octave_user_function_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <ctime> |
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31 |
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32 #include <string> |
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33 |
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34 #include "oct-obj.h" |
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35 #include "ov-fcn.h" |
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36 #include "ov-typeinfo.h" |
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37 |
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38 class string_vector; |
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39 |
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40 class octave_value; |
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41 class tree_parameter_list; |
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42 class tree_statement_list; |
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43 class tree_va_return_list; |
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44 class tree_walker; |
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45 class symbol_table; |
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46 class symbol_record; |
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47 |
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48 // Builtin functions. |
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49 |
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50 class |
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51 octave_user_function : public octave_function |
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52 { |
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53 public: |
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54 |
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55 octave_user_function (tree_parameter_list *pl = 0, |
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56 tree_parameter_list *rl = 0, |
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57 tree_statement_list *cl = 0, |
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58 symbol_table *st = 0); |
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59 |
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60 ~octave_user_function (void); |
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61 |
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62 octave_function *function_value (bool) { return this; } |
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63 |
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64 octave_user_function *define_param_list (tree_parameter_list *t); |
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65 |
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66 octave_user_function *define_ret_list (tree_parameter_list *t); |
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67 |
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68 void stash_fcn_file_name (void); |
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69 |
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70 void mark_fcn_file_up_to_date (time_t t) |
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71 { t_checked = t; } |
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72 |
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73 void stash_fcn_file_time (time_t t) |
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74 { |
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75 t_parsed = t; |
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76 mark_fcn_file_up_to_date (t); |
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77 } |
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78 |
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79 void stash_symtab_ptr (symbol_record *sr) |
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80 { symtab_entry = sr; } |
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81 |
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82 string fcn_file_name (void) const |
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83 { return file_name; } |
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84 |
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85 time_t time_parsed (void) const |
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86 { return t_parsed; } |
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87 |
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88 time_t time_checked (void) const |
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89 { return t_checked; } |
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90 |
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91 void mark_as_system_fcn_file (void); |
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92 |
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93 bool is_system_fcn_file (void) const |
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94 { return system_fcn_file; } |
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95 |
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96 bool takes_varargs (void) const; |
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97 |
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98 void octave_va_start (void) |
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99 { curr_va_arg_number = num_named_args; } |
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100 |
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101 octave_value octave_va_arg (void); |
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102 |
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103 octave_value_list octave_all_va_args (void); |
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104 |
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105 bool takes_var_return (void) const; |
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106 |
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107 void octave_vr_val (const octave_value& val); |
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108 |
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109 void stash_function_name (const string& s); |
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110 |
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111 string function_name (void) |
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112 { return fcn_name; } |
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113 |
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114 octave_value_list do_index_op (int nargout, const octave_value_list& args); |
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115 |
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116 void traceback_error (void); |
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117 |
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118 tree_parameter_list *parameter_list (void) { return param_list; } |
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119 |
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120 tree_parameter_list *return_list (void) { return ret_list; } |
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121 |
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122 tree_statement_list *body (void) { return cmd_list; } |
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123 |
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124 void accept (tree_walker& tw); |
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125 |
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126 private: |
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127 |
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128 octave_user_function (void); |
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129 |
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130 octave_user_function (const octave_user_function& m); |
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131 |
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132 // List of arguments for this function. These are local variables. |
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133 tree_parameter_list *param_list; |
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134 |
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135 // List of parameters we return. These are also local variables in |
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136 // this function. |
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137 tree_parameter_list *ret_list; |
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138 |
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139 // The list of commands that make up the body of this function. |
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140 tree_statement_list *cmd_list; |
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141 |
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142 // The local symbol table for this function. |
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143 symbol_table *sym_tab; |
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144 |
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145 // The name of the file we parsed |
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146 string file_name; |
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147 |
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148 // The name of the function. |
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149 string fcn_name; |
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150 |
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151 // The time the file was parsed. |
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152 time_t t_parsed; |
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153 |
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154 // The time the file was last checked to see if it needs to be |
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155 // parsed again. |
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156 time_t t_checked; |
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157 |
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158 // True if this function came from a file that is considered to be a |
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159 // system function. This affects whether we check the time stamp |
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160 // on the file to see if it has changed. |
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161 bool system_fcn_file; |
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162 |
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163 // Used to keep track of recursion depth. |
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164 int call_depth; |
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165 |
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166 // The number of arguments that have names. |
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167 int num_named_args; |
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168 |
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169 // The values that were passed as arguments. |
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170 octave_value_list args_passed; |
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171 |
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172 // The number of arguments passed in. |
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173 int num_args_passed; |
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174 |
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175 // Used to keep track of the current offset into the list of va_args. |
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176 int curr_va_arg_number; |
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177 |
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178 // The list of return values when an unspecified number can be |
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179 // returned. |
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180 tree_va_return_list *vr_list; |
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181 |
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182 // The symbol record for this function. |
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183 symbol_record *symtab_entry; |
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184 |
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185 // The symbol record for argn in the local symbol table. |
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186 symbol_record *argn_sr; |
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187 |
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188 // The symbol record for nargin in the local symbol table. |
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189 symbol_record *nargin_sr; |
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190 |
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191 // The symbol record for nargout in the local symbol table. |
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192 symbol_record *nargout_sr; |
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193 |
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194 void print_code_function_header (void); |
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195 |
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196 void print_code_function_trailer (void); |
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197 |
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198 void install_automatic_vars (void); |
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199 |
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200 void bind_automatic_vars (const string_vector& arg_names, int nargin, |
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201 int nargout); |
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202 |
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203 DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA |
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204 |
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205 DECLARE_OCTAVE_ALLOCATOR |
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206 }; |
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207 |
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208 #endif |
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209 |
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210 /* |
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211 ;;; Local Variables: *** |
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212 ;;; mode: C++ *** |
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213 ;;; End: *** |
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214 */ |
