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1 // variables.cc -*- C++ -*- |
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2 /* |
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3 |
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296
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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 #ifdef HAVE_CONFIG_H |
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25 #include "config.h" |
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26 #endif |
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27 |
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28 #include <sys/types.h> |
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29 #ifdef HAVE_UNISTD_H |
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30 #include <unistd.h> |
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31 #endif |
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32 #include <ctype.h> |
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33 #include <iostream.h> |
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34 #include <strstream.h> |
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35 |
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36 #include "statdefs.h" |
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37 #include "tree-const.h" |
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38 #include "variables.h" |
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195
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39 #include "user-prefs.h" |
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40 #include "symtab.h" |
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195
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41 #include "builtins.h" |
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42 #include "g-builtins.h" |
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43 #include "t-builtins.h" |
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44 #include "error.h" |
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45 #include "utils.h" |
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46 #include "tree.h" |
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164
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47 #include "help.h" |
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48 |
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49 // Symbol table for symbols at the top level. |
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50 symbol_table *top_level_sym_tab; |
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51 |
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52 // Symbol table for the current scope. |
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53 symbol_table *curr_sym_tab; |
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54 |
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55 // Symbol table for global symbols. |
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56 symbol_table *global_sym_tab; |
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57 |
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195
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58 void |
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59 initialize_symbol_tables (void) |
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60 { |
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61 global_sym_tab = new symbol_table (); |
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62 |
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63 top_level_sym_tab = new symbol_table (); |
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64 |
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65 curr_sym_tab = top_level_sym_tab; |
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66 } |
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67 |
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68 /* |
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69 * Is there a corresponding M-file that is newer than the symbol |
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70 * definition? |
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71 */ |
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72 int |
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73 symbol_out_of_date (symbol_record *sr) |
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74 { |
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195
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75 int ignore = user_pref.ignore_function_time_stamp; |
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76 |
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77 if (ignore == 2) |
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78 return 0; |
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79 |
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80 if (sr != (symbol_record *) NULL) |
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81 { |
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82 tree *ans = sr->def (); |
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83 if (ans != NULL_TREE) |
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84 { |
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85 char *mf = ans->m_file_name (); |
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195
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86 if (! (mf == (char *) NULL |
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87 || (ignore && ans->is_system_m_file ()))) |
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88 { |
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89 time_t tp = ans->time_parsed (); |
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195
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90 char *fname = m_file_in_path (mf); |
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91 int status = is_newer (fname, tp); |
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92 delete [] fname; |
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93 if (status > 0) |
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94 return 1; |
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95 } |
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96 } |
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97 } |
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195
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98 return 0; |
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99 } |
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100 |
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195
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101 void |
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102 document_symbol (const char *name, const char *help) |
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103 { |
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195
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104 if (is_builtin_variable (name)) |
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105 { |
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195
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106 error ("sorry, can't redefine help for builtin variables"); |
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107 } |
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108 else |
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109 { |
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110 symbol_record *sym_rec = curr_sym_tab->lookup (name, 0); |
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111 if (sym_rec == (symbol_record *) NULL) |
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112 { |
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195
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113 error ("document: no such symbol `%s'", name); |
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114 } |
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115 else |
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116 { |
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195
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117 sym_rec->document (help); |
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118 } |
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119 } |
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195
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120 } |
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121 |
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195
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122 void |
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123 install_builtin_mapper_function (builtin_mapper_functions *mf) |
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124 { |
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125 symbol_record *sym_rec = global_sym_tab->lookup (mf->name, 1); |
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126 sym_rec->unprotect (); |
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127 |
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128 Mapper_fcn mfcn; |
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330
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129 mfcn.can_return_complex_for_real_arg = mf->can_return_complex_for_real_arg; |
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130 mfcn.lower_limit = mf->lower_limit; |
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131 mfcn.upper_limit = mf->upper_limit; |
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195
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132 mfcn.d_d_mapper = mf->d_d_mapper; |
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133 mfcn.d_c_mapper = mf->d_c_mapper; |
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134 mfcn.c_c_mapper = mf->c_c_mapper; |
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135 |
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330
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136 tree_builtin *def = new tree_builtin (2, 1, mfcn, mf->name); |
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195
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137 |
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138 sym_rec->define (def); |
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139 |
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140 sym_rec->document (mf->help_string); |
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141 sym_rec->make_eternal (); |
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142 sym_rec->protect (); |
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143 } |
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144 |
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145 void |
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146 install_builtin_text_function (builtin_text_functions *tf) |
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147 { |
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148 symbol_record *sym_rec = global_sym_tab->lookup (tf->name, 1); |
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149 sym_rec->unprotect (); |
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150 |
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151 tree_builtin *def = new tree_builtin (tf->nargin_max, 1, |
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152 tf->text_fcn, tf->name); |
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153 |
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154 sym_rec->define (def); |
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155 |
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156 sym_rec->document (tf->help_string); |
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157 sym_rec->make_eternal (); |
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158 sym_rec->protect (); |
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159 |
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160 } |
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161 |
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195
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162 void |
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163 install_builtin_general_function (builtin_general_functions *gf) |
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164 { |
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165 symbol_record *sym_rec = global_sym_tab->lookup (gf->name, 1); |
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166 sym_rec->unprotect (); |
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167 |
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168 tree_builtin *def = new tree_builtin (gf->nargin_max, |
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169 gf->nargout_max, |
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170 gf->general_fcn, gf->name); |
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171 |
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172 sym_rec->define (def); |
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173 |
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174 sym_rec->document (gf->help_string); |
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175 sym_rec->make_eternal (); |
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176 sym_rec->protect (); |
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177 } |
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178 |
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179 void |
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180 install_builtin_variable (builtin_string_variables *sv) |
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181 { |
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195
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182 tree_constant *val = new tree_constant (sv->value); |
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183 |
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184 bind_builtin_variable (sv->name, val, 0, 1, sv->sv_function, |
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185 sv->help_string); |
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186 } |
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187 |
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188 void |
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189 install_builtin_variable_as_function (const char *name, tree_constant *val, |
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190 int protect = 0, int eternal = 0) |
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191 { |
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192 symbol_record *sym_rec = global_sym_tab->lookup (name, 1); |
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193 sym_rec->unprotect (); |
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194 |
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195 char *tmp_help = sym_rec->help (); |
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196 |
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195
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197 sym_rec->define_as_fcn (val); |
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198 |
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199 sym_rec->document (tmp_help); |
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200 |
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201 if (protect) |
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202 sym_rec->protect (); |
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203 |
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204 if (eternal) |
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205 sym_rec->make_eternal (); |
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206 } |
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207 |
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208 void |
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209 bind_nargin_and_nargout (symbol_table *sym_tab, int nargin, int nargout) |
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210 { |
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211 tree_constant *tmp; |
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212 symbol_record *sr; |
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213 |
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195
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214 sr = sym_tab->lookup ("nargin", 1, 0); |
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215 sr->unprotect (); |
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216 tmp = new tree_constant (nargin-1); |
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217 sr->define (tmp); |
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218 sr->protect (); |
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219 |
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220 sr = sym_tab->lookup ("nargout", 1, 0); |
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221 sr->unprotect (); |
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222 tmp = new tree_constant (nargout); |
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223 sr->define (tmp); |
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224 sr->protect (); |
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225 } |
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226 |
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227 /* |
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195
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228 * Give a global variable a definition. This will insert the symbol |
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229 * in the global table if necessary. |
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230 */ |
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231 void |
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232 bind_builtin_variable (const char *varname, tree_constant *val, |
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233 int protect = 0, int eternal = 0, |
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234 sv_Function sv_fcn = (sv_Function) 0, |
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235 const char *help = (char *) 0) |
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236 { |
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237 symbol_record *sr = global_sym_tab->lookup (varname, 1, 0); |
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238 |
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239 // It is a programming error for a builtin symbol to be missing. |
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240 // Besides, we just inserted it, so it must be there. |
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241 |
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242 assert (sr != (symbol_record *) NULL); |
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243 |
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244 sr->unprotect (); |
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245 |
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246 // Must do this before define, since define will call the special |
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247 // variable function only if it knows about it, and it needs to, so |
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248 // that user prefs can be properly initialized. |
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249 |
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250 if (sv_fcn) |
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251 sr->set_sv_function (sv_fcn); |
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252 |
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253 sr->define_builtin_var (val); |
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254 |
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255 if (protect) |
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256 sr->protect (); |
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257 |
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258 if (eternal) |
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259 sr->make_eternal (); |
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260 |
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261 if (help) |
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262 sr->document (help); |
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263 } |
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264 |
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265 /* |
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266 * Look for the given name in the global symbol table. If it refers |
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267 * to a string, return a new copy. If not, return NULL. |
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268 */ |
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269 char * |
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270 builtin_string_variable (const char *name) |
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271 { |
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195
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272 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
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273 |
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274 // It is a prorgramming error to look for builtins that aren't. |
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275 |
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276 assert (sr != (symbol_record *) NULL); |
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277 |
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278 char *retval = (char *) NULL; |
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279 |
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280 tree *defn = sr->def (); |
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281 |
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282 if (defn != NULL_TREE) |
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283 { |
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284 tree_constant val = defn->eval (0); |
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285 |
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286 if (! error_state && val.is_string_type ()) |
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287 { |
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288 char *s = val.string_value (); |
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289 if (s != (char *) NULL) |
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290 retval = strsave (s); |
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291 } |
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292 } |
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293 |
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294 return retval; |
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295 } |
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296 |
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297 /* |
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195
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298 * Look for the given name in the global symbol table. If it refers |
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299 * to a real scalar, place the value in d and return 0. Otherwise, |
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300 * return -1. |
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301 */ |
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302 int |
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303 builtin_real_scalar_variable (const char *name, double& d) |
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304 { |
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305 int status = -1; |
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306 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
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307 |
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308 // It is a prorgramming error to look for builtins that aren't. |
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309 |
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310 assert (sr != (symbol_record *) NULL); |
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311 |
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312 tree *defn = sr->def (); |
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313 |
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314 if (defn != NULL_TREE) |
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315 { |
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316 tree_constant val = defn->eval (0); |
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195
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317 |
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318 if (! error_state |
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319 && val.const_type () == tree_constant_rep::scalar_constant) |
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320 { |
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321 d = val.double_value (); |
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322 status = 0; |
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323 } |
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324 } |
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325 |
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326 return status; |
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327 } |
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328 |
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329 /* |
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195
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330 * Make the definition of the symbol record sr be the same as the |
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331 * definition of the global variable of the same name, creating it if |
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332 * it doesn't already exist. |
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333 */ |
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334 void |
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335 link_to_global_variable (symbol_record *sr) |
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336 { |
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337 if (sr->is_linked_to_global ()) |
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338 return; |
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339 |
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340 symbol_record *gsr = global_sym_tab->lookup (sr->name (), 1, 0); |
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341 |
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342 if (sr->is_formal_parameter ()) |
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343 { |
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344 error ("can't make function parameter `%s' global", sr->name ()); |
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345 return; |
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346 } |
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347 |
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348 // There must be a better way to do this. XXX FIXME XXX |
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349 |
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350 if (sr->is_variable ()) |
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351 { |
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352 // Would be nice not to have this cast. XXX FIXME XXX |
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353 tree_constant *tmp = (tree_constant *) sr->def (); |
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207
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354 if (tmp == NULL_TREE_CONST) |
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355 tmp = new tree_constant (); |
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356 else |
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357 tmp = new tree_constant (*tmp); |
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195
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358 gsr->define (tmp); |
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359 } |
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360 else |
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361 { |
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362 sr->clear (); |
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363 } |
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364 |
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365 // If the global symbol is currently defined as a function, we need to |
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366 // hide it with a variable. |
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367 |
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368 if (gsr->is_function ()) |
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369 gsr->define (NULL_TREE_CONST); |
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370 |
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371 sr->alias (gsr, 1); |
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372 sr->mark_as_linked_to_global (); |
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373 } |
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374 |
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375 /* |
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376 * Make the definition of the symbol record sr be the same as the |
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377 * definition of the builtin variable of the same name. |
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378 */ |
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379 void |
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380 link_to_builtin_variable (symbol_record *sr) |
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381 { |
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382 symbol_record *tmp_sym = global_sym_tab->lookup (sr->name (), 0, 0); |
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383 |
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384 if (tmp_sym != (symbol_record *) NULL) |
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385 { |
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386 if (tmp_sym->is_builtin_variable ()) |
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387 { |
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388 sr->alias (tmp_sym); |
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389 } |
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390 } |
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391 } |
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392 |
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393 /* |
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394 * Make the definition of the symbol record sr be the same as the |
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395 * definition of the builtin variable or function, or user function of |
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396 * the same name, provided that the name has not been used as a formal |
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397 * parameter. |
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398 */ |
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399 void |
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400 link_to_builtin_or_function (symbol_record *sr) |
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401 { |
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402 symbol_record *tmp_sym = global_sym_tab->lookup (sr->name (), 0, 0); |
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403 |
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404 if (tmp_sym != (symbol_record *) NULL) |
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405 { |
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406 if ((tmp_sym->is_builtin_variable () || tmp_sym->is_function ()) |
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407 && ! tmp_sym->is_formal_parameter ()) |
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408 { |
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409 sr->alias (tmp_sym); |
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410 } |
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411 } |
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412 } |
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413 |
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414 /* |
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415 * Force a link to a function in the current symbol table. This is |
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416 * used just after defining a function to avoid different behavior |
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417 * depending on whether or not the function has been evaluated after |
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418 * being defined. |
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419 * |
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420 * Return without doing anything if there isn't a function with the |
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421 * given name defined in the global symbol table. |
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422 */ |
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423 void |
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424 force_link_to_function (const char *id_name) |
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425 { |
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426 symbol_record *gsr = global_sym_tab->lookup (id_name, 1, 0); |
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427 if (gsr->is_function ()) |
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428 { |
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429 curr_sym_tab->clear (id_name); |
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430 symbol_record *csr = curr_sym_tab->lookup (id_name, 1, 0); |
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431 csr->alias (gsr); |
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432 } |
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433 } |
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434 |
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435 /* |
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436 * Return 1 if the argument names a globally visible variable. |
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437 * Otherwise, return 0. |
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438 */ |
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439 int |
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440 is_globally_visible (const char *name) |
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441 { |
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442 symbol_record *sr = curr_sym_tab->lookup (name, 0, 0); |
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443 return (sr != (symbol_record *) NULL && sr->is_linked_to_global ()); |
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444 } |
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445 |
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446 /* |
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1
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447 * Extract a keyword and its value from a file. Input should look |
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448 * something like: |
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449 * |
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450 * #[ \t]*keyword[ \t]*:[ \t]*string-value\n |
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279
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451 * |
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312
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452 * Returns a pointer to new storage. The caller is responsible for |
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453 * deleting it. |
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1
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454 */ |
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279
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455 char * |
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456 extract_keyword (istream& is, char *keyword) |
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1
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457 { |
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279
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458 ostrstream buf; |
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1
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459 |
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312
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460 char *retval = (char *) NULL; |
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1
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461 |
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462 char c; |
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463 while (is.get (c)) |
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464 { |
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465 if (c == '#') |
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466 { |
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467 while (is.get (c) && (c == ' ' || c == '\t' || c == '#')) |
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468 ; // Skip whitespace and comment characters. |
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469 |
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470 if (isalpha (c)) |
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279
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471 buf << c; |
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1
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472 |
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473 while (is.get (c) && isalpha (c)) |
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279
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474 buf << c; |
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1
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475 |
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279
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476 buf << ends; |
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477 char *tmp = buf.str (); |
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478 int match = (strncmp (tmp, keyword, strlen (keyword)) == 0); |
|
|
479 delete [] tmp; |
|
|
480 |
|
|
481 if (match) |
|
1
|
482 { |
|
279
|
483 ostrstream value; |
|
1
|
484 while (is.get (c) && (c == ' ' || c == '\t' || c == ':')) |
|
|
485 ; // Skip whitespace and the colon. |
|
|
486 |
|
|
487 if (c != '\n') |
|
|
488 { |
|
279
|
489 value << c; |
|
1
|
490 while (is.get (c) && c != '\n') |
|
279
|
491 value << c; |
|
1
|
492 } |
|
279
|
493 value << ends; |
|
|
494 retval = value.str (); |
|
1
|
495 break; |
|
|
496 } |
|
|
497 } |
|
|
498 } |
|
279
|
499 return retval; |
|
1
|
500 } |
|
|
501 |
|
|
502 int |
|
|
503 extract_keyword (istream& is, char *keyword, int& value) |
|
|
504 { |
|
279
|
505 ostrstream buf; |
|
1
|
506 |
|
|
507 int status = 0; |
|
|
508 value = 0; |
|
|
509 |
|
|
510 char c; |
|
|
511 while (is.get (c)) |
|
|
512 { |
|
|
513 if (c == '#') |
|
|
514 { |
|
|
515 while (is.get (c) && (c == ' ' || c == '\t' || c == '#')) |
|
|
516 ; // Skip whitespace and comment characters. |
|
|
517 |
|
|
518 if (isalpha (c)) |
|
279
|
519 buf << c; |
|
1
|
520 |
|
|
521 while (is.get (c) && isalpha (c)) |
|
279
|
522 buf << c; |
|
1
|
523 |
|
279
|
524 buf << ends; |
|
|
525 char *tmp = buf.str (); |
|
|
526 int match = (strncmp (tmp, keyword, strlen (keyword)) == 0); |
|
|
527 delete [] tmp; |
|
|
528 |
|
|
529 if (match) |
|
1
|
530 { |
|
|
531 while (is.get (c) && (c == ' ' || c == '\t' || c == ':')) |
|
|
532 ; // Skip whitespace and the colon. |
|
|
533 |
|
|
534 is.putback (c); |
|
|
535 if (c != '\n') |
|
|
536 is >> value; |
|
|
537 if (is) |
|
|
538 status = 1; |
|
|
539 while (is.get (c) && c != '\n') |
|
|
540 ; // Skip to beginning of next line; |
|
|
541 break; |
|
|
542 } |
|
|
543 } |
|
|
544 } |
|
|
545 return status; |
|
|
546 } |
|
|
547 |
|
|
548 /* |
|
|
549 * Skip trailing white space and |
|
|
550 */ |
|
|
551 void |
|
|
552 skip_comments (istream& is) |
|
|
553 { |
|
|
554 char c = '\0'; |
|
|
555 while (is.get (c)) |
|
|
556 { |
|
|
557 if (c == ' ' || c == '\t' || c == '\n') |
|
|
558 ; // Skip whitespace on way to beginning of next line. |
|
|
559 else |
|
|
560 break; |
|
|
561 } |
|
|
562 |
|
|
563 for (;;) |
|
|
564 { |
|
|
565 if (is && c == '#') |
|
|
566 while (is.get (c) && c != '\n') |
|
|
567 ; // Skip to beginning of next line, ignoring everything. |
|
|
568 else |
|
|
569 break; |
|
|
570 } |
|
|
571 } |
|
|
572 |
|
|
573 /* |
|
|
574 * Is `s' a valid identifier? |
|
|
575 */ |
|
|
576 int |
|
|
577 valid_identifier (char *s) |
|
|
578 { |
|
|
579 if (s == (char *) NULL || ! (isalnum (*s) || *s == '_')) |
|
|
580 return 0; |
|
|
581 |
|
|
582 while (*++s != '\0') |
|
|
583 if (! (isalnum (*s) || *s == '_')) |
|
|
584 return 0; |
|
|
585 |
|
|
586 return 1; |
|
|
587 } |
|
|
588 |
|
|
589 /* |
|
|
590 * See if the identifier is in scope. |
|
|
591 */ |
|
|
592 int |
|
|
593 identifier_exists (char *name) |
|
|
594 { |
|
159
|
595 symbol_record *sr = curr_sym_tab->lookup (name, 0, 0); |
|
|
596 if (sr == (symbol_record *) NULL) |
|
|
597 sr = global_sym_tab->lookup (name, 0, 0); |
|
1
|
598 |
|
159
|
599 if (sr != (symbol_record *) NULL && sr->is_variable ()) |
|
|
600 return 1; |
|
|
601 else if (sr != (symbol_record *) NULL && sr->is_function ()) |
|
|
602 return 2; |
|
1
|
603 else |
|
|
604 { |
|
|
605 char *path = m_file_in_path (name); |
|
|
606 if (path != (char *) NULL) |
|
|
607 { |
|
|
608 delete [] path; |
|
159
|
609 return 2; |
|
1
|
610 } |
|
|
611 else |
|
|
612 { |
|
|
613 struct stat buf; |
|
|
614 if (stat (name, &buf) == 0 && S_ISREG (buf.st_mode)) |
|
159
|
615 return 2; |
|
1
|
616 } |
|
|
617 } |
|
159
|
618 return 0; |
|
1
|
619 } |
|
|
620 |
|
|
621 /* |
|
195
|
622 * Is this variable a builtin? |
|
|
623 */ |
|
|
624 int |
|
|
625 is_builtin_variable (const char *name) |
|
|
626 { |
|
|
627 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
|
|
628 return (sr != (symbol_record *) NULL && sr->is_builtin_variable ()); |
|
|
629 } |
|
|
630 |
|
|
631 /* |
|
1
|
632 * Is this tree_constant a valid function? |
|
|
633 */ |
|
|
634 tree * |
|
|
635 is_valid_function (tree_constant& arg, char *warn_for, int warn = 0) |
|
|
636 { |
|
|
637 tree *ans = NULL_TREE; |
|
|
638 |
|
|
639 if (! arg.is_string_type ()) |
|
|
640 { |
|
|
641 if (warn) |
|
217
|
642 error ("%s: expecting function name as argument", warn_for); |
|
1
|
643 return ans; |
|
|
644 } |
|
|
645 |
|
|
646 char *fcn_name = arg.string_value (); |
|
|
647 symbol_record *sr = global_sym_tab->lookup (fcn_name, 0, 0); |
|
|
648 |
|
|
649 if (sr == (symbol_record *) NULL) |
|
|
650 { |
|
|
651 sr = global_sym_tab->lookup (fcn_name, 1, 0); |
|
|
652 tree_identifier tmp (sr); |
|
|
653 tmp.parse_m_file (0); |
|
|
654 } |
|
|
655 else if (symbol_out_of_date (sr)) |
|
|
656 { |
|
|
657 tree_identifier tmp (sr); |
|
|
658 tmp.parse_m_file (0); |
|
|
659 } |
|
|
660 |
|
|
661 ans = sr->def (); |
|
|
662 if (ans == NULL_TREE || ! sr->is_function ()) |
|
|
663 { |
|
|
664 if (warn) |
|
217
|
665 error ("%s: the symbol `%s' is not valid as a function", |
|
|
666 warn_for, fcn_name); |
|
1
|
667 ans = NULL_TREE; |
|
|
668 } |
|
|
669 |
|
|
670 return ans; |
|
|
671 } |
|
|
672 |
|
|
673 /* |
|
|
674 * Does this function take the right number of arguments? |
|
|
675 */ |
|
|
676 int |
|
|
677 takes_correct_nargs (tree *fcn, int expected_nargin, char *warn_for, |
|
|
678 int warn = 0) |
|
|
679 { |
|
|
680 int nargs = fcn->max_expected_args () - 1; |
|
|
681 int e_nargs = expected_nargin - 1; |
|
|
682 if (nargs != e_nargs) |
|
|
683 { |
|
|
684 if (warn) |
|
217
|
685 error ("%s: expecting function to take %d argument%c", |
|
|
686 warn_for, e_nargs, s_plural (e_nargs)); |
|
1
|
687 return 0; |
|
|
688 } |
|
|
689 return 1; |
|
|
690 } |
|
|
691 |
|
195
|
692 // It's not likely that this does the right thing now. XXX FIXME XXX |
|
|
693 |
|
1
|
694 char ** |
|
|
695 make_name_list (void) |
|
|
696 { |
|
|
697 int key_len = 0; |
|
|
698 int glb_len = 0; |
|
|
699 int top_len = 0; |
|
|
700 int lcl_len = 0; |
|
|
701 int mfl_len = 0; |
|
|
702 |
|
|
703 char **key = (char **) NULL; |
|
|
704 char **glb = (char **) NULL; |
|
|
705 char **top = (char **) NULL; |
|
|
706 char **lcl = (char **) NULL; |
|
|
707 char **mfl = (char **) NULL; |
|
|
708 |
|
244
|
709 // Each of these functions returns a new vector of pointers to new |
|
|
710 // strings. |
|
|
711 |
|
1
|
712 key = names (keyword_help (), key_len); |
|
|
713 glb = global_sym_tab->list (glb_len); |
|
|
714 top = top_level_sym_tab->list (top_len); |
|
|
715 if (top_level_sym_tab != curr_sym_tab) |
|
|
716 lcl = curr_sym_tab->list (lcl_len); |
|
|
717 mfl = get_m_file_names (mfl_len, 1); |
|
|
718 |
|
|
719 int total_len = key_len + glb_len + top_len + lcl_len + mfl_len; |
|
|
720 |
|
|
721 char **list = new char * [total_len+1]; |
|
|
722 |
|
244
|
723 // Put all the symbols in one big list. Only copy pointers, not the |
|
|
724 // strings they point to, then only delete the original array of |
|
|
725 // pointers, and not the strings they point to. |
|
|
726 |
|
1
|
727 int j = 0; |
|
|
728 int i = 0; |
|
|
729 for (i = 0; i < key_len; i++) |
|
244
|
730 list[j++] = key[i]; |
|
1
|
731 |
|
|
732 for (i = 0; i < glb_len; i++) |
|
244
|
733 list[j++] = glb[i]; |
|
1
|
734 |
|
|
735 for (i = 0; i < top_len; i++) |
|
244
|
736 list[j++] = top[i]; |
|
1
|
737 |
|
|
738 for (i = 0; i < lcl_len; i++) |
|
244
|
739 list[j++] = lcl[i]; |
|
1
|
740 |
|
|
741 for (i = 0; i < mfl_len; i++) |
|
244
|
742 list[j++] = mfl[i]; |
|
1
|
743 |
|
|
744 list[j] = (char *) NULL; |
|
|
745 |
|
|
746 delete [] key; |
|
|
747 delete [] glb; |
|
|
748 delete [] top; |
|
|
749 delete [] lcl; |
|
|
750 delete [] mfl; |
|
|
751 |
|
|
752 return list; |
|
|
753 } |
|
|
754 |
|
|
755 /* |
|
|
756 ;;; Local Variables: *** |
|
|
757 ;;; mode: C++ *** |
|
|
758 ;;; page-delimiter: "^/\\*" *** |
|
|
759 ;;; End: *** |
|
|
760 */ |
