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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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529
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33 #include <float.h> |
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34 #include <string.h> |
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35 #include <fstream.h> |
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36 #include <iostream.h> |
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279
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37 #include <strstream.h> |
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38 |
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39 #include "statdefs.h" |
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40 #include "tree-const.h" |
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41 #include "variables.h" |
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529
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42 #include "mappers.h" |
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195
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43 #include "user-prefs.h" |
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529
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44 #include "version.h" |
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45 #include "symtab.h" |
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529
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46 #include "defaults.h" |
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47 #include "dirfns.h" |
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48 #include "pager.h" |
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49 #include "sysdep.h" |
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50 #include "octave.h" |
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51 #include "oct-obj.h" |
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52 #include "error.h" |
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53 #include "utils.h" |
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54 #include "tree.h" |
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164
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55 #include "help.h" |
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529
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56 #include "defun.h" |
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57 |
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58 extern "C" |
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59 { |
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60 #include <readline/tilde.h> |
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61 |
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62 #include "fnmatch.h" |
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63 } |
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64 |
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65 // Symbol table for symbols at the top level. |
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66 symbol_table *top_level_sym_tab; |
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67 |
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68 // Symbol table for the current scope. |
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69 symbol_table *curr_sym_tab; |
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70 |
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71 // Symbol table for global symbols. |
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72 symbol_table *global_sym_tab; |
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73 |
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195
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74 void |
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75 initialize_symbol_tables (void) |
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76 { |
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77 global_sym_tab = new symbol_table (); |
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78 |
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79 top_level_sym_tab = new symbol_table (); |
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80 |
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81 curr_sym_tab = top_level_sym_tab; |
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82 } |
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83 |
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84 /* |
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338
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85 * Is there a corresponding function file that is newer than the |
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86 * symbol definition? |
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87 */ |
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88 int |
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89 symbol_out_of_date (symbol_record *sr) |
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90 { |
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195
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91 int ignore = user_pref.ignore_function_time_stamp; |
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92 |
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93 if (ignore == 2) |
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94 return 0; |
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95 |
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529
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96 if (sr) |
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97 { |
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490
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98 tree_fvc *ans = sr->def (); |
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529
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99 if (ans) |
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100 { |
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339
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101 char *ff = ans->fcn_file_name (); |
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529
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102 if (ff && ! (ignore && ans->is_system_fcn_file ())) |
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103 { |
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104 time_t tp = ans->time_parsed (); |
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105 char *fname = fcn_file_in_path (ff); |
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106 int status = is_newer (fname, tp); |
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107 delete [] fname; |
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108 if (status > 0) |
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109 return 1; |
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110 } |
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111 } |
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112 } |
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195
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113 return 0; |
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114 } |
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115 |
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195
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116 void |
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117 document_symbol (const char *name, const char *help) |
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118 { |
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195
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119 if (is_builtin_variable (name)) |
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120 { |
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195
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121 error ("sorry, can't redefine help for builtin variables"); |
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122 } |
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123 else |
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124 { |
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125 symbol_record *sym_rec = curr_sym_tab->lookup (name, 0); |
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529
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126 if (sym_rec) |
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127 sym_rec->document (help); |
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128 else |
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529
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129 error ("document: no such symbol `%s'", name); |
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130 } |
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195
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131 } |
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132 |
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195
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133 void |
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529
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134 install_builtin_mapper (builtin_mapper_function *mf) |
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195
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135 { |
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136 symbol_record *sym_rec = global_sym_tab->lookup (mf->name, 1); |
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137 sym_rec->unprotect (); |
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138 |
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139 Mapper_fcn mfcn; |
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330
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140 mfcn.can_return_complex_for_real_arg = mf->can_return_complex_for_real_arg; |
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141 mfcn.lower_limit = mf->lower_limit; |
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142 mfcn.upper_limit = mf->upper_limit; |
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195
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143 mfcn.d_d_mapper = mf->d_d_mapper; |
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144 mfcn.d_c_mapper = mf->d_c_mapper; |
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145 mfcn.c_c_mapper = mf->c_c_mapper; |
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146 |
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330
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147 tree_builtin *def = new tree_builtin (2, 1, mfcn, mf->name); |
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195
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148 |
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149 sym_rec->define (def); |
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150 |
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151 sym_rec->document (mf->help_string); |
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152 sym_rec->make_eternal (); |
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153 sym_rec->protect (); |
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154 } |
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155 |
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156 void |
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529
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157 install_builtin_function (builtin_function *f) |
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195
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158 { |
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529
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159 symbol_record *sym_rec = global_sym_tab->lookup (f->name, 1); |
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160 sym_rec->unprotect (); |
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161 |
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529
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162 tree_builtin *def = new tree_builtin (f->nargin_max, f->nargout_max, |
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163 f->fcn, f->name); |
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164 |
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529
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165 sym_rec->define (def, f->is_text_fcn); |
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166 |
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529
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167 sym_rec->document (f->help_string); |
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168 sym_rec->make_eternal (); |
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169 sym_rec->protect (); |
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170 } |
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171 |
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172 void |
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529
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173 install_builtin_variable (builtin_variable *v) |
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174 { |
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529
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175 if (v->install_as_function) |
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176 install_builtin_variable_as_function (v->name, v->value, v->protect, |
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177 v->eternal, v->help_string); |
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178 else |
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179 bind_builtin_variable (v->name, v->value, v->protect, v->eternal, |
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180 v->sv_function, v->help_string); |
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195
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181 } |
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182 |
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183 void |
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184 install_builtin_variable_as_function (const char *name, tree_constant *val, |
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529
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185 int protect, int eternal, |
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186 const char *help) |
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195
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187 { |
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188 symbol_record *sym_rec = global_sym_tab->lookup (name, 1); |
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189 sym_rec->unprotect (); |
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190 |
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529
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191 const char *tmp_help = help; |
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192 if (! help) |
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193 tmp_help = sym_rec->help (); |
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194 |
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195
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195 sym_rec->define_as_fcn (val); |
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196 |
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197 sym_rec->document (tmp_help); |
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198 |
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199 if (protect) |
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200 sym_rec->protect (); |
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201 |
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202 if (eternal) |
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203 sym_rec->make_eternal (); |
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204 } |
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205 |
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206 void |
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207 bind_nargin_and_nargout (symbol_table *sym_tab, int nargin, int nargout) |
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208 { |
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209 tree_constant *tmp; |
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210 symbol_record *sr; |
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211 |
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195
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212 sr = sym_tab->lookup ("nargin", 1, 0); |
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213 sr->unprotect (); |
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214 tmp = new tree_constant (nargin-1); |
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215 sr->define (tmp); |
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216 sr->protect (); |
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217 |
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218 sr = sym_tab->lookup ("nargout", 1, 0); |
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219 sr->unprotect (); |
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220 tmp = new tree_constant (nargout); |
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221 sr->define (tmp); |
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222 sr->protect (); |
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223 } |
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224 |
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225 /* |
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195
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226 * Give a global variable a definition. This will insert the symbol |
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227 * in the global table if necessary. |
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228 */ |
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229 void |
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230 bind_builtin_variable (const char *varname, tree_constant *val, |
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529
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231 int protect, int eternal, sv_Function sv_fcn, |
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232 const char *help) |
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195
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233 { |
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234 symbol_record *sr = global_sym_tab->lookup (varname, 1, 0); |
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235 |
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236 // It is a programming error for a builtin symbol to be missing. |
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237 // Besides, we just inserted it, so it must be there. |
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238 |
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529
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239 assert (sr); |
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240 |
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241 sr->unprotect (); |
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242 |
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243 // Must do this before define, since define will call the special |
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244 // variable function only if it knows about it, and it needs to, so |
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245 // that user prefs can be properly initialized. |
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246 |
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247 if (sv_fcn) |
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248 sr->set_sv_function (sv_fcn); |
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249 |
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250 sr->define_builtin_var (val); |
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251 |
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252 if (protect) |
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253 sr->protect (); |
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254 |
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255 if (eternal) |
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256 sr->make_eternal (); |
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257 |
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258 if (help) |
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259 sr->document (help); |
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260 } |
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261 |
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262 /* |
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263 * Look for the given name in the global symbol table. If it refers |
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264 * to a string, return a new copy. If not, return 0; |
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265 */ |
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266 char * |
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267 builtin_string_variable (const char *name) |
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268 { |
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195
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269 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
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270 |
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271 // It is a prorgramming error to look for builtins that aren't. |
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272 |
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273 assert (sr); |
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274 |
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529
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275 char *retval = 0; |
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276 |
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490
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277 tree_fvc *defn = sr->def (); |
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278 |
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529
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279 if (defn) |
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280 { |
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281 tree_constant val = defn->eval (0); |
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195
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282 |
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283 if (! error_state && val.is_string_type ()) |
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284 { |
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285 char *s = val.string_value (); |
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529
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286 if (s) |
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287 retval = strsave (s); |
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288 } |
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289 } |
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290 |
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291 return retval; |
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292 } |
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293 |
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294 /* |
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195
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295 * Look for the given name in the global symbol table. If it refers |
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296 * to a real scalar, place the value in d and return 0. Otherwise, |
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297 * return -1. |
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298 */ |
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299 int |
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300 builtin_real_scalar_variable (const char *name, double& d) |
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301 { |
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302 int status = -1; |
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195
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303 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
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304 |
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305 // It is a prorgramming error to look for builtins that aren't. |
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306 |
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529
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307 assert (sr); |
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308 |
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490
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309 tree_fvc *defn = sr->def (); |
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310 |
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529
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311 if (defn) |
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312 { |
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313 tree_constant val = defn->eval (0); |
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314 |
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315 if (! error_state |
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316 && val.const_type () == tree_constant_rep::scalar_constant) |
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1
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317 { |
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318 d = val.double_value (); |
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319 status = 0; |
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320 } |
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321 } |
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322 |
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323 return status; |
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324 } |
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325 |
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326 /* |
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195
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327 * Make the definition of the symbol record sr be the same as the |
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328 * definition of the global variable of the same name, creating it if |
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329 * it doesn't already exist. |
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330 */ |
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331 void |
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332 link_to_global_variable (symbol_record *sr) |
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333 { |
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334 if (sr->is_linked_to_global ()) |
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335 return; |
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336 |
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337 symbol_record *gsr = global_sym_tab->lookup (sr->name (), 1, 0); |
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338 |
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339 if (sr->is_formal_parameter ()) |
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340 { |
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341 error ("can't make function parameter `%s' global", sr->name ()); |
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342 return; |
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343 } |
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344 |
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345 // There must be a better way to do this. XXX FIXME XXX |
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346 |
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347 if (sr->is_variable ()) |
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348 { |
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349 // Would be nice not to have this cast. XXX FIXME XXX |
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350 tree_constant *tmp = (tree_constant *) sr->def (); |
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529
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351 if (tmp) |
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352 tmp = new tree_constant (*tmp); |
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353 else |
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207
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354 tmp = new tree_constant (); |
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195
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355 gsr->define (tmp); |
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356 } |
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357 else |
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529
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358 sr->clear (); |
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195
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359 |
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360 // If the global symbol is currently defined as a function, we need to |
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361 // hide it with a variable. |
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362 |
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363 if (gsr->is_function ()) |
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529
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364 gsr->define ((tree_constant *) 0); |
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195
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365 |
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366 sr->alias (gsr, 1); |
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367 sr->mark_as_linked_to_global (); |
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368 } |
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369 |
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370 /* |
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371 * Make the definition of the symbol record sr be the same as the |
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372 * definition of the builtin variable of the same name. |
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373 */ |
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374 void |
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375 link_to_builtin_variable (symbol_record *sr) |
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376 { |
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377 symbol_record *tmp_sym = global_sym_tab->lookup (sr->name (), 0, 0); |
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378 |
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529
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379 if (tmp_sym && tmp_sym->is_builtin_variable ()) |
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380 sr->alias (tmp_sym); |
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195
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381 } |
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382 |
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383 /* |
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384 * Make the definition of the symbol record sr be the same as the |
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385 * definition of the builtin variable or function, or user function of |
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386 * the same name, provided that the name has not been used as a formal |
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387 * parameter. |
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388 */ |
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389 void |
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390 link_to_builtin_or_function (symbol_record *sr) |
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391 { |
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392 symbol_record *tmp_sym = global_sym_tab->lookup (sr->name (), 0, 0); |
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393 |
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529
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394 if (tmp_sym |
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395 && (tmp_sym->is_builtin_variable () || tmp_sym->is_function ()) |
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396 && ! tmp_sym->is_formal_parameter ()) |
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397 sr->alias (tmp_sym); |
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195
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398 } |
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399 |
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400 /* |
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401 * Force a link to a function in the current symbol table. This is |
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402 * used just after defining a function to avoid different behavior |
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403 * depending on whether or not the function has been evaluated after |
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404 * being defined. |
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405 * |
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406 * Return without doing anything if there isn't a function with the |
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407 * given name defined in the global symbol table. |
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408 */ |
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409 void |
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410 force_link_to_function (const char *id_name) |
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411 { |
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412 symbol_record *gsr = global_sym_tab->lookup (id_name, 1, 0); |
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413 if (gsr->is_function ()) |
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414 { |
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415 curr_sym_tab->clear (id_name); |
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416 symbol_record *csr = curr_sym_tab->lookup (id_name, 1, 0); |
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417 csr->alias (gsr); |
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418 } |
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419 } |
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420 |
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529
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421 DEFUN ("is_global", Fis_global, Sis_global, 2, 1, |
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422 "is_global (X): return 1 if the string X names a global variable\n\ |
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423 otherwise, return 0.") |
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195
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424 { |
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529
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425 Octave_object retval (0.0); |
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426 |
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427 int nargin = args.length (); |
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428 |
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429 if (nargin != 2 || ! args(1).is_string_type ()) |
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430 { |
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431 print_usage ("is_global"); |
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432 return retval; |
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433 } |
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434 |
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435 char *name = args(1).string_value (); |
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436 |
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195
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437 symbol_record *sr = curr_sym_tab->lookup (name, 0, 0); |
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529
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438 |
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439 retval = (double) (sr && sr->is_linked_to_global ()); |
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440 |
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441 return retval; |
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195
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442 } |
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443 |
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444 /* |
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1
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445 * Extract a keyword and its value from a file. Input should look |
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446 * something like: |
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447 * |
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448 * #[ \t]*keyword[ \t]*:[ \t]*string-value\n |
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279
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449 * |
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312
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450 * Returns a pointer to new storage. The caller is responsible for |
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451 * deleting it. |
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1
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452 */ |
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279
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453 char * |
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454 extract_keyword (istream& is, char *keyword) |
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1
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455 { |
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279
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456 ostrstream buf; |
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1
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457 |
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529
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458 char *retval = 0; |
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1
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459 |
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460 char c; |
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461 while (is.get (c)) |
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462 { |
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463 if (c == '#') |
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464 { |
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465 while (is.get (c) && (c == ' ' || c == '\t' || c == '#')) |
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466 ; // Skip whitespace and comment characters. |
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467 |
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|
468 if (isalpha (c)) |
|
279
|
469 buf << c; |
|
1
|
470 |
|
|
471 while (is.get (c) && isalpha (c)) |
|
279
|
472 buf << c; |
|
1
|
473 |
|
279
|
474 buf << ends; |
|
|
475 char *tmp = buf.str (); |
|
|
476 int match = (strncmp (tmp, keyword, strlen (keyword)) == 0); |
|
|
477 delete [] tmp; |
|
|
478 |
|
|
479 if (match) |
|
1
|
480 { |
|
279
|
481 ostrstream value; |
|
1
|
482 while (is.get (c) && (c == ' ' || c == '\t' || c == ':')) |
|
|
483 ; // Skip whitespace and the colon. |
|
|
484 |
|
|
485 if (c != '\n') |
|
|
486 { |
|
279
|
487 value << c; |
|
1
|
488 while (is.get (c) && c != '\n') |
|
279
|
489 value << c; |
|
1
|
490 } |
|
279
|
491 value << ends; |
|
|
492 retval = value.str (); |
|
1
|
493 break; |
|
|
494 } |
|
|
495 } |
|
|
496 } |
|
279
|
497 return retval; |
|
1
|
498 } |
|
|
499 |
|
|
500 int |
|
|
501 extract_keyword (istream& is, char *keyword, int& value) |
|
|
502 { |
|
279
|
503 ostrstream buf; |
|
1
|
504 |
|
|
505 int status = 0; |
|
|
506 value = 0; |
|
|
507 |
|
|
508 char c; |
|
|
509 while (is.get (c)) |
|
|
510 { |
|
|
511 if (c == '#') |
|
|
512 { |
|
|
513 while (is.get (c) && (c == ' ' || c == '\t' || c == '#')) |
|
|
514 ; // Skip whitespace and comment characters. |
|
|
515 |
|
|
516 if (isalpha (c)) |
|
279
|
517 buf << c; |
|
1
|
518 |
|
|
519 while (is.get (c) && isalpha (c)) |
|
279
|
520 buf << c; |
|
1
|
521 |
|
279
|
522 buf << ends; |
|
|
523 char *tmp = buf.str (); |
|
|
524 int match = (strncmp (tmp, keyword, strlen (keyword)) == 0); |
|
|
525 delete [] tmp; |
|
|
526 |
|
|
527 if (match) |
|
1
|
528 { |
|
|
529 while (is.get (c) && (c == ' ' || c == '\t' || c == ':')) |
|
|
530 ; // Skip whitespace and the colon. |
|
|
531 |
|
|
532 is.putback (c); |
|
|
533 if (c != '\n') |
|
|
534 is >> value; |
|
|
535 if (is) |
|
|
536 status = 1; |
|
|
537 while (is.get (c) && c != '\n') |
|
|
538 ; // Skip to beginning of next line; |
|
|
539 break; |
|
|
540 } |
|
|
541 } |
|
|
542 } |
|
|
543 return status; |
|
|
544 } |
|
|
545 |
|
|
546 /* |
|
|
547 * Skip trailing white space and |
|
|
548 */ |
|
|
549 void |
|
|
550 skip_comments (istream& is) |
|
|
551 { |
|
|
552 char c = '\0'; |
|
|
553 while (is.get (c)) |
|
|
554 { |
|
|
555 if (c == ' ' || c == '\t' || c == '\n') |
|
|
556 ; // Skip whitespace on way to beginning of next line. |
|
|
557 else |
|
|
558 break; |
|
|
559 } |
|
|
560 |
|
|
561 for (;;) |
|
|
562 { |
|
|
563 if (is && c == '#') |
|
|
564 while (is.get (c) && c != '\n') |
|
|
565 ; // Skip to beginning of next line, ignoring everything. |
|
|
566 else |
|
|
567 break; |
|
|
568 } |
|
|
569 } |
|
|
570 |
|
|
571 /* |
|
|
572 * Is `s' a valid identifier? |
|
|
573 */ |
|
|
574 int |
|
|
575 valid_identifier (char *s) |
|
|
576 { |
|
529
|
577 if (! s || ! (isalnum (*s) || *s == '_')) |
|
1
|
578 return 0; |
|
|
579 |
|
|
580 while (*++s != '\0') |
|
|
581 if (! (isalnum (*s) || *s == '_')) |
|
|
582 return 0; |
|
|
583 |
|
|
584 return 1; |
|
|
585 } |
|
|
586 |
|
529
|
587 DEFUN ("exist", Fexist, Sexist, 2, 1, |
|
|
588 "exist (NAME): check if variable or file exists\n\ |
|
|
589 \n\ |
|
|
590 return 0 if NAME is undefined, 1 if it is a variable, or 2 if it is\n\ |
|
|
591 a function.") |
|
1
|
592 { |
|
529
|
593 Octave_object retval; |
|
|
594 |
|
|
595 int nargin = args.length (); |
|
|
596 |
|
|
597 if (nargin != 2 || ! args(1).is_string_type ()) |
|
|
598 { |
|
|
599 print_usage ("exist"); |
|
|
600 return retval; |
|
|
601 } |
|
|
602 |
|
|
603 char *name = args(1).string_value (); |
|
|
604 |
|
159
|
605 symbol_record *sr = curr_sym_tab->lookup (name, 0, 0); |
|
529
|
606 if (! sr) |
|
159
|
607 sr = global_sym_tab->lookup (name, 0, 0); |
|
1
|
608 |
|
529
|
609 retval = 0.0; |
|
|
610 |
|
|
611 if (sr && sr->is_variable () && sr->is_defined ()) |
|
|
612 retval = 1.0; |
|
|
613 else if (sr && sr->is_function ()) |
|
|
614 retval = 2.0; |
|
1
|
615 else |
|
|
616 { |
|
338
|
617 char *path = fcn_file_in_path (name); |
|
529
|
618 if (path) |
|
1
|
619 { |
|
|
620 delete [] path; |
|
529
|
621 retval = 2.0; |
|
1
|
622 } |
|
|
623 else |
|
|
624 { |
|
|
625 struct stat buf; |
|
|
626 if (stat (name, &buf) == 0 && S_ISREG (buf.st_mode)) |
|
529
|
627 retval = 2.0; |
|
1
|
628 } |
|
|
629 } |
|
529
|
630 |
|
|
631 return retval; |
|
1
|
632 } |
|
|
633 |
|
|
634 /* |
|
195
|
635 * Is this variable a builtin? |
|
|
636 */ |
|
|
637 int |
|
|
638 is_builtin_variable (const char *name) |
|
|
639 { |
|
|
640 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
|
529
|
641 return (sr && sr->is_builtin_variable ()); |
|
195
|
642 } |
|
|
643 |
|
|
644 /* |
|
1
|
645 * Is this tree_constant a valid function? |
|
|
646 */ |
|
490
|
647 tree_fvc * |
|
529
|
648 is_valid_function (const tree_constant& arg, char *warn_for, int warn) |
|
1
|
649 { |
|
529
|
650 tree_fvc *ans = 0; |
|
1
|
651 |
|
|
652 if (! arg.is_string_type ()) |
|
|
653 { |
|
|
654 if (warn) |
|
217
|
655 error ("%s: expecting function name as argument", warn_for); |
|
1
|
656 return ans; |
|
|
657 } |
|
|
658 |
|
|
659 char *fcn_name = arg.string_value (); |
|
|
660 symbol_record *sr = global_sym_tab->lookup (fcn_name, 0, 0); |
|
|
661 |
|
529
|
662 if (sr && symbol_out_of_date (sr)) |
|
|
663 { |
|
|
664 tree_identifier tmp (sr); |
|
|
665 tmp.parse_fcn_file (0); |
|
|
666 } |
|
|
667 else |
|
1
|
668 { |
|
|
669 sr = global_sym_tab->lookup (fcn_name, 1, 0); |
|
|
670 tree_identifier tmp (sr); |
|
338
|
671 tmp.parse_fcn_file (0); |
|
1
|
672 } |
|
|
673 |
|
|
674 ans = sr->def (); |
|
529
|
675 if (! ans || ! sr->is_function ()) |
|
1
|
676 { |
|
|
677 if (warn) |
|
217
|
678 error ("%s: the symbol `%s' is not valid as a function", |
|
|
679 warn_for, fcn_name); |
|
529
|
680 ans = 0; |
|
1
|
681 } |
|
|
682 |
|
|
683 return ans; |
|
|
684 } |
|
|
685 |
|
|
686 /* |
|
|
687 * Does this function take the right number of arguments? |
|
|
688 */ |
|
|
689 int |
|
490
|
690 takes_correct_nargs (tree_fvc *fcn, int expected_nargin, char *warn_for, |
|
529
|
691 int warn) |
|
1
|
692 { |
|
506
|
693 int nargin = fcn->max_expected_args () - 1; |
|
|
694 int e_nargin = expected_nargin - 1; |
|
|
695 if (nargin != e_nargin) |
|
1
|
696 { |
|
|
697 if (warn) |
|
217
|
698 error ("%s: expecting function to take %d argument%c", |
|
529
|
699 warn_for, e_nargin, (e_nargin == 1 ? "" : "s")); |
|
1
|
700 return 0; |
|
|
701 } |
|
|
702 return 1; |
|
|
703 } |
|
|
704 |
|
195
|
705 // It's not likely that this does the right thing now. XXX FIXME XXX |
|
|
706 |
|
1
|
707 char ** |
|
|
708 make_name_list (void) |
|
|
709 { |
|
|
710 int key_len = 0; |
|
|
711 int glb_len = 0; |
|
|
712 int top_len = 0; |
|
|
713 int lcl_len = 0; |
|
339
|
714 int ffl_len = 0; |
|
1
|
715 |
|
529
|
716 char **key = 0; |
|
|
717 char **glb = 0; |
|
|
718 char **top = 0; |
|
|
719 char **lcl = 0; |
|
|
720 char **ffl = 0; |
|
1
|
721 |
|
244
|
722 // Each of these functions returns a new vector of pointers to new |
|
|
723 // strings. |
|
|
724 |
|
1
|
725 key = names (keyword_help (), key_len); |
|
|
726 glb = global_sym_tab->list (glb_len); |
|
|
727 top = top_level_sym_tab->list (top_len); |
|
|
728 if (top_level_sym_tab != curr_sym_tab) |
|
|
729 lcl = curr_sym_tab->list (lcl_len); |
|
339
|
730 ffl = get_fcn_file_names (ffl_len, 1); |
|
1
|
731 |
|
339
|
732 int total_len = key_len + glb_len + top_len + lcl_len + ffl_len; |
|
1
|
733 |
|
|
734 char **list = new char * [total_len+1]; |
|
|
735 |
|
244
|
736 // Put all the symbols in one big list. Only copy pointers, not the |
|
|
737 // strings they point to, then only delete the original array of |
|
|
738 // pointers, and not the strings they point to. |
|
|
739 |
|
1
|
740 int j = 0; |
|
|
741 int i = 0; |
|
|
742 for (i = 0; i < key_len; i++) |
|
244
|
743 list[j++] = key[i]; |
|
1
|
744 |
|
|
745 for (i = 0; i < glb_len; i++) |
|
244
|
746 list[j++] = glb[i]; |
|
1
|
747 |
|
|
748 for (i = 0; i < top_len; i++) |
|
244
|
749 list[j++] = top[i]; |
|
1
|
750 |
|
|
751 for (i = 0; i < lcl_len; i++) |
|
244
|
752 list[j++] = lcl[i]; |
|
1
|
753 |
|
339
|
754 for (i = 0; i < ffl_len; i++) |
|
|
755 list[j++] = ffl[i]; |
|
1
|
756 |
|
529
|
757 list[j] = 0; |
|
1
|
758 |
|
|
759 delete [] key; |
|
|
760 delete [] glb; |
|
|
761 delete [] top; |
|
|
762 delete [] lcl; |
|
339
|
763 delete [] ffl; |
|
1
|
764 |
|
|
765 return list; |
|
|
766 } |
|
|
767 |
|
529
|
768 int |
|
|
769 is_text_function_name (const char *s) |
|
|
770 { |
|
|
771 symbol_record *sr = global_sym_tab->lookup (s); |
|
|
772 return (sr && sr->is_text_function ()); |
|
|
773 } |
|
|
774 |
|
|
775 void |
|
|
776 install_builtin_variables (void) |
|
|
777 { |
|
|
778 // XXX FIXME XX -- these should probably be moved to where they |
|
|
779 // logically belong instead of being all grouped here. |
|
|
780 |
|
|
781 DEFVAR ("EDITOR", SBV_EDITOR, editor, 0, 0, 1, sv_editor, |
|
|
782 "name of the editor to be invoked by the edit_history command"); |
|
|
783 |
|
|
784 DEFVAR ("I", SBV_I, Complex (0.0, 1.0), 0, 1, 1, 0, |
|
|
785 "sqrt (-1)"); |
|
|
786 |
|
|
787 DEFVAR ("Inf", SBV_Inf, octave_Inf, 0, 1, 1, 0, |
|
|
788 "infinity"); |
|
|
789 |
|
|
790 DEFVAR ("INFO_FILE", SBV_INFO_FILE, info_file, 0, 0, 1, sv_info_file, |
|
|
791 "name of the Octave info file"); |
|
|
792 |
|
|
793 DEFVAR ("J", SBV_J, Complex (0.0, 1.0), 0, 1, 1, 0, |
|
|
794 "sqrt (-1)"); |
|
|
795 |
|
|
796 #if defined (HAVE_ISNAN) |
|
|
797 DEFVAR ("NaN", SBV_NaN, octave_NaN, 0, 1, 1, 0, |
|
|
798 "not a number"); |
|
|
799 #endif |
|
|
800 |
|
|
801 DEFVAR ("LOADPATH", SBV_LOADPATH, load_path, 0, 0, 1, sv_loadpath, |
|
|
802 "colon separated list of directories to search for scripts"); |
|
|
803 |
|
|
804 DEFVAR ("PAGER", SBV_PAGER, default_pager (), 0, 0, 1, sv_pager_binary, |
|
|
805 "path to pager binary"); |
|
|
806 |
|
|
807 DEFVAR ("PS1", SBV_PS1, "\\s:\\#> ", 0, 0, 1, sv_ps1, |
|
|
808 "primary prompt string"); |
|
|
809 |
|
|
810 DEFVAR ("PS2", SBV_PS2, "> ", 0, 0, 1, sv_ps2, |
|
|
811 "secondary prompt string"); |
|
|
812 |
|
|
813 DEFVAR ("PWD", SBV_PWD, get_working_directory ("initialize_globals"), |
|
|
814 0, 1, 1, sv_pwd, |
|
|
815 "current working directory"); |
|
|
816 |
|
|
817 DEFVAR ("SEEK_SET", SBV_SEEK_SET, 0.0, 0, 1, 1, 0, |
|
|
818 "used with fseek to position file relative to the beginning"); |
|
|
819 |
|
|
820 DEFVAR ("SEEK_CUR", SBV_SEEK_CUR, 1.0, 0, 1, 1, 0, |
|
|
821 "used with fseek to position file relative to the current position"); |
|
|
822 |
|
|
823 DEFVAR ("SEEK_END", SBV_SEEK_END, 2.0, 0, 1, 1, 0, |
|
|
824 "used with fseek to position file relative to the end"); |
|
|
825 |
|
|
826 DEFVAR ("ans", SBV_ans, , 0, 0, 1, 0, |
|
|
827 ""); |
|
|
828 |
|
|
829 DEFVAR ("commas_in_literal_matrix", SBV_commas_in_literal_matrix, "", |
|
|
830 0, 0, 1, commas_in_literal_matrix, |
|
|
831 "control auto-insertion of commas in literal matrices"); |
|
|
832 |
|
|
833 DEFVAR ("do_fortran_indexing", SBV_do_fortran_indexing, "false", 0, 0, |
|
|
834 1, do_fortran_indexing, |
|
|
835 "allow single indices for matrices"); |
|
|
836 |
|
|
837 DEFVAR ("empty_list_elements_ok", SBV_empty_list_elements_ok, "warn", |
|
|
838 0, 0, 1, empty_list_elements_ok, |
|
|
839 "ignore the empty element in expressions like `a = [[], 1]'"); |
|
|
840 |
|
|
841 DEFVAR ("eps", SBV_eps, DBL_EPSILON, 0, 1, 1, 0, |
|
|
842 "machine precision"); |
|
|
843 |
|
|
844 DEFVAR ("gnuplot_binary", SBV_gnuplot_binary, "gnuplot", 0, 0, 1, |
|
|
845 sv_gnuplot_binary, |
|
|
846 "path to gnuplot binary"); |
|
|
847 |
|
|
848 DEFVAR ("i", SBV_i, Complex (0.0, 1.0), 1, 1, 1, 0, |
|
|
849 "sqrt (-1)"); |
|
|
850 |
|
|
851 DEFVAR ("ignore_function_time_stamp", SBV_ignore_function_time_stamp, |
|
|
852 "system", 0, 0, 1, |
|
|
853 ignore_function_time_stamp, |
|
|
854 "don't check to see if function files have changed since they were\n\ |
|
|
855 last compiled. Possible values are \"system\" and \"all\""); |
|
|
856 |
|
|
857 DEFVAR ("implicit_str_to_num_ok", SBV_implicit_str_to_num_ok, "false", |
|
|
858 0, 0, 1, implicit_str_to_num_ok, |
|
|
859 "allow implicit string to number conversion"); |
|
|
860 |
|
|
861 DEFVAR ("inf", SBV_inf, octave_Inf, 0, 1, 1, 0, |
|
|
862 "infinity"); |
|
|
863 |
|
|
864 DEFVAR ("j", SBV_j, Complex (0.0, 1.0), 1, 1, 1, 0, |
|
|
865 "sqrt (-1)"); |
|
|
866 |
|
|
867 #if defined (HAVE_ISNAN) |
|
|
868 DEFVAR ("nan", SBV_nan, octave_NaN, 0, 1, 1, 0, |
|
|
869 "not a number"); |
|
|
870 #endif |
|
|
871 |
|
|
872 DEFVAR ("ok_to_lose_imaginary_part", SBV_ok_to_lose_imaginary_part, |
|
|
873 "warn", 0, 0, 1, ok_to_lose_imaginary_part, |
|
|
874 "silently convert from complex to real by dropping imaginary part"); |
|
|
875 |
|
|
876 DEFVAR ("output_max_field_width", SBV_output_max_field_width, 10.0, 0, |
|
|
877 0, 1, set_output_max_field_width, |
|
|
878 "maximum width of an output field for numeric output"); |
|
|
879 |
|
|
880 DEFVAR ("output_precision", SBV_output_precision, 5.0, 0, 0, 1, |
|
|
881 set_output_precision, |
|
|
882 "number of significant figures to display for numeric output"); |
|
|
883 |
|
|
884 DEFVAR ("page_screen_output", SBV_page_screen_output, "true", 0, 0, 1, |
|
|
885 page_screen_output, |
|
|
886 "if possible, send output intended for the screen through the pager"); |
|
|
887 |
|
|
888 DEFVAR ("pi", SBV_pi, 4.0 * atan (1.0), 0, 1, 1, 0, |
|
|
889 "ratio of the circumference of a circle to its diameter"); |
|
|
890 |
|
|
891 DEFVAR ("prefer_column_vectors", SBV_prefer_column_vectors, "true", 0, |
|
|
892 0, 1, prefer_column_vectors, |
|
|
893 "prefer column/row vectors"); |
|
|
894 |
|
|
895 DEFVAR ("prefer_zero_one_indexing", SBV_prefer_zero_one_indexing, |
|
|
896 "false", 0, 0, 1, prefer_zero_one_indexing, |
|
|
897 "when there is a conflict, prefer zero-one style indexing"); |
|
|
898 |
|
|
899 DEFVAR ("print_answer_id_name", SBV_print_answer_id_name, "true", 0, |
|
|
900 0, 1, print_answer_id_name, |
|
|
901 "set output style to print `var_name = ...'"); |
|
|
902 |
|
|
903 DEFVAR ("print_empty_dimensions", SBV_print_empty_dimensions, "true", |
|
|
904 0, 0, 1, print_empty_dimensions, |
|
|
905 "also print dimensions of empty matrices"); |
|
|
906 |
|
|
907 DEFVAR ("propagate_empty_matrices", SBV_propagate_empty_matrices, |
|
|
908 "true", 0, 0, 1, propagate_empty_matrices, |
|
|
909 "operations on empty matrices return an empty matrix, not an error"); |
|
|
910 |
|
|
911 DEFVAR ("resize_on_range_error", SBV_resize_on_range_error, "true", 0, |
|
|
912 0, 1, resize_on_range_error, |
|
|
913 "enlarge matrices on assignment"); |
|
|
914 |
|
|
915 DEFVAR ("return_last_computed_value", SBV_return_last_computed_value, |
|
|
916 "false", 0, 0, 1, |
|
|
917 return_last_computed_value, |
|
|
918 "if a function does not return any values explicitly, return the\n\ |
|
|
919 last computed value"); |
|
|
920 |
|
|
921 DEFVAR ("save_precision", SBV_save_precision, 17.0, 0, 0, 1, |
|
|
922 set_save_precision, |
|
|
923 "number of significant figures kept by the ASCII save command"); |
|
|
924 |
|
|
925 DEFVAR ("silent_functions", SBV_silent_functions, "false", 0, 0, 1, |
|
|
926 silent_functions, |
|
|
927 "suppress printing results in called functions"); |
|
|
928 |
|
|
929 DEFVAR ("split_long_rows", SBV_split_long_rows, "true", 0, 0, 1, |
|
|
930 split_long_rows, |
|
|
931 "split long matrix rows instead of wrapping"); |
|
|
932 |
|
|
933 DEFVAR ("stdin", SBV_stdin, 0.0, 0, 1, 1, 0, |
|
|
934 "file number of the standard input stream"); |
|
|
935 |
|
|
936 DEFVAR ("stdout", SBV_stdout, 1.0, 0, 1, 1, 0, |
|
|
937 "file number of the standard output stream"); |
|
|
938 |
|
|
939 DEFVAR ("stderr", SBV_stderr, 2.0, 0, 1, 1, 0, |
|
|
940 "file number of the standard error stream"); |
|
|
941 |
|
|
942 DEFVAR ("treat_neg_dim_as_zero", SBV_treat_neg_dim_as_zero, "false", |
|
|
943 0, 0, 1, treat_neg_dim_as_zero, |
|
|
944 "convert negative dimensions to zero"); |
|
|
945 |
|
|
946 DEFVAR ("warn_assign_as_truth_value", SBV_warn_assign_as_truth_value, |
|
|
947 "true", 0, 0, 1, |
|
|
948 warn_assign_as_truth_value, |
|
|
949 "produce warning for assignments used as truth values"); |
|
|
950 |
|
|
951 DEFVAR ("warn_comma_in_global_decl", SBV_warn_comma_in_global_decl, |
|
|
952 "true", 0, 0, 1, warn_comma_in_global_decl, |
|
|
953 "produce warning for commas in global declarations"); |
|
|
954 |
|
|
955 DEFVAR ("warn_divide_by_zero", SBV_warn_divide_by_zero, "true", 0, 0, |
|
|
956 1, warn_divide_by_zero, |
|
|
957 "on IEEE machines, allow divide by zero errors to be suppressed"); |
|
|
958 } |
|
|
959 |
|
|
960 /* |
|
|
961 * List variable names. |
|
|
962 */ |
|
|
963 static void |
|
|
964 print_symbol_info_line (ostrstream& output_buf, const symbol_record_info& s) |
|
|
965 { |
|
|
966 output_buf << (s.is_read_only () ? " -" : " w"); |
|
|
967 output_buf << (s.is_eternal () ? "- " : "d "); |
|
|
968 #if 0 |
|
|
969 output_buf << (s.hides_fcn () ? "f" : (s.hides_builtin () ? "F" : "-")); |
|
|
970 #endif |
|
|
971 output_buf.form (" %-16s", s.type_as_string ()); |
|
|
972 if (s.is_function ()) |
|
|
973 output_buf << " - -"; |
|
|
974 else |
|
|
975 { |
|
|
976 output_buf.form ("%7d", s.rows ()); |
|
|
977 output_buf.form ("%7d", s.columns ()); |
|
|
978 } |
|
|
979 output_buf << " " << s.name () << "\n"; |
|
|
980 } |
|
|
981 |
|
|
982 static void |
|
|
983 print_long_listing (ostrstream& output_buf, symbol_record_info *s) |
|
|
984 { |
|
|
985 if (! s) |
|
|
986 return; |
|
|
987 |
|
|
988 symbol_record_info *ptr = s; |
|
|
989 while (ptr->is_defined ()) |
|
|
990 { |
|
|
991 print_symbol_info_line (output_buf, *ptr); |
|
|
992 ptr++; |
|
|
993 } |
|
|
994 } |
|
|
995 |
|
|
996 static int |
|
|
997 maybe_list (const char *header, ostrstream& output_buf, |
|
|
998 int show_verbose, symbol_table *sym_tab, unsigned type, |
|
|
999 unsigned scope) |
|
|
1000 { |
|
|
1001 int count; |
|
|
1002 int status = 0; |
|
|
1003 if (show_verbose) |
|
|
1004 { |
|
|
1005 symbol_record_info *symbols; |
|
|
1006 symbols = sym_tab->long_list (count, 1, type, scope); |
|
|
1007 if (symbols && count > 0) |
|
|
1008 { |
|
|
1009 output_buf << "\n" << header << "\n\n" |
|
|
1010 << "prot type rows cols name\n" |
|
|
1011 << "==== ==== ==== ==== ====\n"; |
|
|
1012 |
|
|
1013 print_long_listing (output_buf, symbols); |
|
|
1014 status = 1; |
|
|
1015 } |
|
|
1016 delete [] symbols; |
|
|
1017 } |
|
|
1018 else |
|
|
1019 { |
|
|
1020 char **symbols = sym_tab->list (count, 1, type, scope); |
|
|
1021 if (symbols && count > 0) |
|
|
1022 { |
|
|
1023 output_buf << "\n" << header << "\n\n"; |
|
|
1024 list_in_columns (output_buf, symbols); |
|
|
1025 status = 1; |
|
|
1026 } |
|
|
1027 delete [] symbols; |
|
|
1028 } |
|
|
1029 return status; |
|
|
1030 } |
|
|
1031 |
|
|
1032 DEFUN_TEXT ("clear", Fclear, Sclear, -1, 1, |
|
|
1033 "clear [name ...]\n\ |
|
|
1034 \n\ |
|
|
1035 clear symbol(s) matching a list of globbing patterns\n\ |
|
|
1036 if no arguments are given, clear all user-defined variables and functions") |
|
|
1037 { |
|
|
1038 Octave_object retval; |
|
|
1039 |
|
|
1040 DEFINE_ARGV("clear"); |
|
|
1041 |
|
|
1042 // Always clear the local table, but don't clear currently compiled |
|
|
1043 // functions unless we are at the top level. (Allowing that to happen |
|
|
1044 // inside functions would result in pretty odd behavior...) |
|
|
1045 |
|
|
1046 int clear_user_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
1047 |
|
|
1048 if (argc == 1) |
|
|
1049 { |
|
|
1050 curr_sym_tab->clear (); |
|
|
1051 global_sym_tab->clear (clear_user_functions); |
|
|
1052 } |
|
|
1053 else |
|
|
1054 { |
|
|
1055 int lcount; |
|
|
1056 char **lvars = curr_sym_tab->list (lcount, 0, |
|
|
1057 symbol_def::USER_VARIABLE, |
|
|
1058 SYMTAB_LOCAL_SCOPE); |
|
|
1059 int gcount; |
|
|
1060 char **gvars = curr_sym_tab->list (gcount, 0, |
|
|
1061 symbol_def::USER_VARIABLE, |
|
|
1062 SYMTAB_GLOBAL_SCOPE); |
|
|
1063 int fcount; |
|
|
1064 char **fcns = curr_sym_tab->list (fcount, 0, |
|
|
1065 symbol_def::USER_FUNCTION, |
|
|
1066 SYMTAB_ALL_SCOPES); |
|
|
1067 |
|
|
1068 while (--argc > 0) |
|
|
1069 { |
|
|
1070 argv++; |
|
|
1071 if (*argv) |
|
|
1072 { |
|
|
1073 int i; |
|
|
1074 for (i = 0; i < lcount; i++) |
|
|
1075 { |
|
|
1076 if (fnmatch (*argv, lvars[i], __FNM_FLAGS) == 0) |
|
|
1077 curr_sym_tab->clear (lvars[i]); |
|
|
1078 } |
|
|
1079 |
|
|
1080 int count; |
|
|
1081 for (i = 0; i < gcount; i++) |
|
|
1082 { |
|
|
1083 if (fnmatch (*argv, gvars[i], __FNM_FLAGS) == 0) |
|
|
1084 { |
|
|
1085 count = curr_sym_tab->clear (gvars[i]); |
|
|
1086 if (count > 0) |
|
|
1087 global_sym_tab->clear (gvars[i], clear_user_functions); |
|
|
1088 } |
|
|
1089 } |
|
|
1090 |
|
|
1091 for (i = 0; i < fcount; i++) |
|
|
1092 { |
|
|
1093 if (fnmatch (*argv, fcns[i], __FNM_FLAGS) == 0) |
|
|
1094 { |
|
|
1095 count = curr_sym_tab->clear (fcns[i]); |
|
|
1096 if (count > 0) |
|
|
1097 global_sym_tab->clear (fcns[i], clear_user_functions); |
|
|
1098 } |
|
|
1099 } |
|
|
1100 } |
|
|
1101 } |
|
|
1102 |
|
|
1103 delete [] lvars; |
|
|
1104 delete [] gvars; |
|
|
1105 delete [] fcns; |
|
|
1106 |
|
|
1107 } |
|
|
1108 |
|
|
1109 DELETE_ARGV; |
|
|
1110 |
|
|
1111 return retval; |
|
|
1112 } |
|
|
1113 |
|
|
1114 DEFUN_TEXT ("document", Fdocument, Sdocument, -1, 1, |
|
|
1115 "document symbol string ...\n\ |
|
|
1116 \n\ |
|
|
1117 Associate a cryptic message with a variable name.") |
|
|
1118 { |
|
|
1119 Octave_object retval; |
|
|
1120 |
|
|
1121 DEFINE_ARGV("document"); |
|
|
1122 |
|
|
1123 if (argc == 3) |
|
|
1124 document_symbol (argv[1], argv[2]); |
|
|
1125 else |
|
|
1126 print_usage ("document"); |
|
|
1127 |
|
|
1128 DELETE_ARGV; |
|
|
1129 |
|
|
1130 return retval; |
|
|
1131 } |
|
|
1132 |
|
|
1133 static int |
|
|
1134 load_variable (char *nm, int force, istream& is) |
|
|
1135 { |
|
|
1136 // Is there already a symbol by this name? If so, what is it? |
|
|
1137 |
|
|
1138 symbol_record *lsr = curr_sym_tab->lookup (nm, 0, 0); |
|
|
1139 |
|
|
1140 int is_undefined = 1; |
|
|
1141 int is_variable = 0; |
|
|
1142 int is_function = 0; |
|
|
1143 int is_global = 0; |
|
|
1144 |
|
|
1145 if (lsr) |
|
|
1146 { |
|
|
1147 is_undefined = ! lsr->is_defined (); |
|
|
1148 is_variable = lsr->is_variable (); |
|
|
1149 is_function = lsr->is_function (); |
|
|
1150 is_global = lsr->is_linked_to_global (); |
|
|
1151 } |
|
|
1152 |
|
|
1153 // Try to read data for this name. |
|
|
1154 |
|
|
1155 tree_constant tc; |
|
|
1156 int global = tc.load (is); |
|
|
1157 |
|
|
1158 if (tc.const_type () == tree_constant_rep::unknown_constant) |
|
|
1159 { |
|
|
1160 error ("load: unable to load variable `%s'", nm); |
|
|
1161 return 0; |
|
|
1162 } |
|
|
1163 |
|
|
1164 symbol_record *sr = 0; |
|
|
1165 |
|
|
1166 if (global) |
|
|
1167 { |
|
|
1168 if (is_global || is_undefined) |
|
|
1169 { |
|
|
1170 if (force || is_undefined) |
|
|
1171 { |
|
|
1172 lsr = curr_sym_tab->lookup (nm, 1, 0); |
|
|
1173 link_to_global_variable (lsr); |
|
|
1174 sr = lsr; |
|
|
1175 } |
|
|
1176 else |
|
|
1177 { |
|
|
1178 warning ("load: global variable name `%s' exists.", nm); |
|
|
1179 warning ("use `load -force' to overwrite"); |
|
|
1180 } |
|
|
1181 } |
|
|
1182 else if (is_function) |
|
|
1183 { |
|
|
1184 if (force) |
|
|
1185 { |
|
|
1186 lsr = curr_sym_tab->lookup (nm, 1, 0); |
|
|
1187 link_to_global_variable (lsr); |
|
|
1188 sr = lsr; |
|
|
1189 } |
|
|
1190 else |
|
|
1191 { |
|
|
1192 warning ("load: `%s' is currently a function in this scope", nm); |
|
|
1193 warning ("`load -force' will load variable and hide function"); |
|
|
1194 } |
|
|
1195 } |
|
|
1196 else if (is_variable) |
|
|
1197 { |
|
|
1198 if (force) |
|
|
1199 { |
|
|
1200 lsr = curr_sym_tab->lookup (nm, 1, 0); |
|
|
1201 link_to_global_variable (lsr); |
|
|
1202 sr = lsr; |
|
|
1203 } |
|
|
1204 else |
|
|
1205 { |
|
|
1206 warning ("load: local variable name `%s' exists.", nm); |
|
|
1207 warning ("use `load -force' to overwrite"); |
|
|
1208 } |
|
|
1209 } |
|
|
1210 else |
|
|
1211 panic_impossible (); |
|
|
1212 } |
|
|
1213 else |
|
|
1214 { |
|
|
1215 if (is_global) |
|
|
1216 { |
|
|
1217 if (force || is_undefined) |
|
|
1218 { |
|
|
1219 lsr = curr_sym_tab->lookup (nm, 1, 0); |
|
|
1220 link_to_global_variable (lsr); |
|
|
1221 sr = lsr; |
|
|
1222 } |
|
|
1223 else |
|
|
1224 { |
|
|
1225 warning ("load: global variable name `%s' exists.", nm); |
|
|
1226 warning ("use `load -force' to overwrite"); |
|
|
1227 } |
|
|
1228 } |
|
|
1229 else if (is_function) |
|
|
1230 { |
|
|
1231 if (force) |
|
|
1232 { |
|
|
1233 lsr = curr_sym_tab->lookup (nm, 1, 0); |
|
|
1234 link_to_global_variable (lsr); |
|
|
1235 sr = lsr; |
|
|
1236 } |
|
|
1237 else |
|
|
1238 { |
|
|
1239 warning ("load: `%s' is currently a function in this scope", nm); |
|
|
1240 warning ("`load -force' will load variable and hide function"); |
|
|
1241 } |
|
|
1242 } |
|
|
1243 else if (is_variable || is_undefined) |
|
|
1244 { |
|
|
1245 if (force || is_undefined) |
|
|
1246 { |
|
|
1247 lsr = curr_sym_tab->lookup (nm, 1, 0); |
|
|
1248 sr = lsr; |
|
|
1249 } |
|
|
1250 else |
|
|
1251 { |
|
|
1252 warning ("load: local variable name `%s' exists.", nm); |
|
|
1253 warning ("use `load -force' to overwrite"); |
|
|
1254 } |
|
|
1255 } |
|
|
1256 else |
|
|
1257 panic_impossible (); |
|
|
1258 } |
|
|
1259 |
|
|
1260 if (sr) |
|
|
1261 { |
|
|
1262 tree_constant *tmp_tc = new tree_constant (tc); |
|
|
1263 sr->define (tmp_tc); |
|
|
1264 return 1; |
|
|
1265 } |
|
|
1266 else |
|
|
1267 error ("load: unable to load variable `%s'", nm); |
|
|
1268 |
|
|
1269 return 0; |
|
|
1270 } |
|
|
1271 |
|
|
1272 DEFUN_TEXT ("load", Fload, Sload, -1, 1, |
|
|
1273 "load [-force] file\n |
|
|
1274 \n\ |
|
|
1275 load variables from a file") |
|
|
1276 { |
|
|
1277 Octave_object retval; |
|
|
1278 |
|
|
1279 DEFINE_ARGV("load"); |
|
|
1280 |
|
|
1281 argc--; |
|
|
1282 argv++; |
|
|
1283 |
|
|
1284 int force = 0; |
|
|
1285 if (argc > 0 && strcmp (*argv, "-force") == 0) |
|
|
1286 { |
|
|
1287 force++; |
|
|
1288 argc--; |
|
|
1289 argv++; |
|
|
1290 } |
|
|
1291 |
|
|
1292 if (argc < 1) |
|
|
1293 { |
|
|
1294 error ("load: you must specify a single file to read"); |
|
|
1295 DELETE_ARGV; |
|
|
1296 return retval; |
|
|
1297 } |
|
|
1298 |
|
|
1299 static istream stream; |
|
|
1300 static ifstream file; |
|
|
1301 if (strcmp (*argv, "-") == 0) |
|
|
1302 { |
|
|
1303 stream = cin; |
|
|
1304 } |
|
|
1305 else |
|
|
1306 { |
|
|
1307 char *fname = tilde_expand (*argv); |
|
|
1308 file.open (fname); |
|
|
1309 if (! file) |
|
|
1310 { |
|
|
1311 error ("load: couldn't open input file `%s'", *argv); |
|
|
1312 DELETE_ARGV; |
|
|
1313 return retval; |
|
|
1314 } |
|
|
1315 stream = file; |
|
|
1316 } |
|
|
1317 |
|
|
1318 int count = 0; |
|
|
1319 char *nm = 0; |
|
|
1320 for (;;) |
|
|
1321 { |
|
|
1322 // Read name for this entry or break on EOF. |
|
|
1323 delete [] nm; |
|
|
1324 nm = extract_keyword (stream, "name"); |
|
|
1325 if (nm) |
|
|
1326 count++; |
|
|
1327 else |
|
|
1328 { |
|
|
1329 if (count == 0) |
|
|
1330 { |
|
|
1331 error ("load: no name keywords found in file `%s'", *argv); |
|
|
1332 error ("Are you sure this is an octave data file?"); |
|
|
1333 } |
|
|
1334 break; |
|
|
1335 } |
|
|
1336 |
|
|
1337 if (! *nm) |
|
|
1338 continue; |
|
|
1339 |
|
|
1340 if (! valid_identifier (nm)) |
|
|
1341 { |
|
|
1342 warning ("load: skipping bogus identifier `%s'"); |
|
|
1343 continue; |
|
|
1344 } |
|
|
1345 |
|
|
1346 load_variable (nm, force, stream); |
|
|
1347 |
|
|
1348 if (error_state) |
|
|
1349 { |
|
|
1350 error ("reading file %s", *argv); |
|
|
1351 break; |
|
|
1352 } |
|
|
1353 } |
|
|
1354 |
|
|
1355 if (file); |
|
|
1356 file.close (); |
|
|
1357 |
|
|
1358 DELETE_ARGV; |
|
|
1359 |
|
|
1360 return retval; |
|
|
1361 } |
|
|
1362 |
|
|
1363 /* |
|
|
1364 * Return nonzero if PATTERN has any special globbing chars in it. |
|
|
1365 */ |
|
|
1366 static int |
|
|
1367 glob_pattern_p (char *pattern) |
|
|
1368 { |
|
|
1369 char *p = pattern; |
|
|
1370 char c; |
|
|
1371 int open = 0; |
|
|
1372 |
|
|
1373 while ((c = *p++) != '\0') |
|
|
1374 { |
|
|
1375 switch (c) |
|
|
1376 { |
|
|
1377 case '?': |
|
|
1378 case '*': |
|
|
1379 return 1; |
|
|
1380 |
|
|
1381 case '[': // Only accept an open brace if there is a close |
|
|
1382 open++; // brace to match it. Bracket expressions must be |
|
|
1383 continue; // complete, according to Posix.2 |
|
|
1384 |
|
|
1385 case ']': |
|
|
1386 if (open) |
|
|
1387 return 1; |
|
|
1388 continue; |
|
|
1389 |
|
|
1390 case '\\': |
|
|
1391 if (*p++ == '\0') |
|
|
1392 return 0; |
|
|
1393 |
|
|
1394 default: |
|
|
1395 continue; |
|
|
1396 } |
|
|
1397 } |
|
|
1398 |
|
|
1399 return 0; |
|
|
1400 } |
|
|
1401 |
|
|
1402 DEFUN_TEXT ("save", Fsave, Ssave, -1, 1, |
|
|
1403 "save file [var ...]\n\ |
|
|
1404 \n\ |
|
|
1405 save variables in a file") |
|
|
1406 { |
|
|
1407 Octave_object retval; |
|
|
1408 |
|
|
1409 #if 0 |
|
|
1410 DEFINE_ARGV("save"); |
|
|
1411 |
|
|
1412 if (argc < 2) |
|
|
1413 { |
|
|
1414 print_usage ("save"); |
|
|
1415 DELETE_ARGV; |
|
|
1416 return retval; |
|
|
1417 } |
|
|
1418 |
|
|
1419 argc--; |
|
|
1420 argv++; |
|
|
1421 |
|
|
1422 static ostream stream; |
|
|
1423 static ofstream file; |
|
|
1424 if (strcmp (*argv, "-") == 0) |
|
|
1425 { |
|
|
1426 // XXX FIXME XXX -- should things intended for the screen end up in a |
|
|
1427 // tree_constant (string)? |
|
|
1428 stream = cout; |
|
|
1429 } |
|
|
1430 else if (argc == 1 && glob_pattern_p (*argv)) // Guard against things |
|
|
1431 { // like `save a*', |
|
|
1432 print_usage ("save"); // which are probably |
|
|
1433 DELETE_ARGV; // mistakes... |
|
|
1434 return retval; |
|
|
1435 } |
|
|
1436 else |
|
|
1437 { |
|
|
1438 char *fname = tilde_expand (*argv); |
|
|
1439 file.open (fname); |
|
|
1440 if (! file) |
|
|
1441 { |
|
|
1442 error ("save: couldn't open output file `%s'", *argv); |
|
|
1443 DELETE_ARGV; |
|
|
1444 return retval; |
|
|
1445 } |
|
|
1446 stream = file; |
|
|
1447 |
|
|
1448 } |
|
|
1449 |
|
|
1450 int prec = user_pref.save_precision; |
|
|
1451 |
|
|
1452 if (argc == 1) |
|
|
1453 { |
|
|
1454 int count; |
|
|
1455 char **vars = curr_sym_tab->list (count, 0, |
|
|
1456 symbol_def::USER_VARIABLE, |
|
|
1457 SYMTAB_ALL_SCOPES); |
|
|
1458 |
|
|
1459 for (int i = 0; i < count; i++) |
|
|
1460 curr_sym_tab->save (stream, vars[i], |
|
|
1461 is_globally_visible (vars[i]), prec); |
|
|
1462 |
|
|
1463 delete [] vars; |
|
|
1464 } |
|
|
1465 else |
|
|
1466 { |
|
|
1467 while (--argc > 0) |
|
|
1468 { |
|
|
1469 argv++; |
|
|
1470 |
|
|
1471 int count; |
|
|
1472 char **lvars = curr_sym_tab->list (count, 0, |
|
|
1473 symbol_def::USER_VARIABLE); |
|
|
1474 |
|
|
1475 int saved_or_error = 0; |
|
|
1476 int i; |
|
|
1477 for (i = 0; i < count; i++) |
|
|
1478 { |
|
|
1479 if (fnmatch (*argv, lvars[i], __FNM_FLAGS) == 0 |
|
|
1480 && curr_sym_tab->save (stream, lvars[i], |
|
|
1481 is_globally_visible (lvars[i]), |
|
|
1482 prec) != 0) |
|
|
1483 saved_or_error++; |
|
|
1484 } |
|
|
1485 |
|
|
1486 char **bvars = global_sym_tab->list (count, 0, |
|
|
1487 symbol_def::BUILTIN_VARIABLE); |
|
|
1488 |
|
|
1489 for (i = 0; i < count; i++) |
|
|
1490 { |
|
|
1491 if (fnmatch (*argv, bvars[i], __FNM_FLAGS) == 0 |
|
|
1492 && global_sym_tab->save (stream, bvars[i], 0, prec) != 0) |
|
|
1493 saved_or_error++; |
|
|
1494 } |
|
|
1495 |
|
|
1496 delete [] lvars; |
|
|
1497 delete [] bvars; |
|
|
1498 |
|
|
1499 if (! saved_or_error) |
|
|
1500 warning ("save: no such variable `%s'", *argv); |
|
|
1501 } |
|
|
1502 } |
|
|
1503 |
|
|
1504 if (file); |
|
|
1505 file.close (); |
|
|
1506 |
|
|
1507 DELETE_ARGV; |
|
|
1508 #endif |
|
|
1509 |
|
|
1510 return retval; |
|
|
1511 } |
|
|
1512 |
|
|
1513 DEFUN_TEXT ("who", Fwho, Swho, -1, 1, |
|
|
1514 "who [-all] [-builtins] [-functions] [-long] [-variables]\n\ |
|
|
1515 \n\ |
|
|
1516 List currently defined symbol(s). Options may be shortened to one\n\ |
|
|
1517 character, but may not be combined.") |
|
|
1518 { |
|
|
1519 Octave_object retval; |
|
|
1520 |
|
|
1521 DEFINE_ARGV("who"); |
|
|
1522 |
|
|
1523 int show_builtins = 0; |
|
|
1524 int show_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
1525 int show_variables = 1; |
|
|
1526 int show_verbose = 0; |
|
|
1527 |
|
|
1528 if (argc > 1) |
|
|
1529 { |
|
|
1530 show_functions = 0; |
|
|
1531 show_variables = 0; |
|
|
1532 } |
|
|
1533 |
|
|
1534 for (int i = 1; i < argc; i++) |
|
|
1535 { |
|
|
1536 argv++; |
|
|
1537 if (strcmp (*argv, "-all") == 0 || strcmp (*argv, "-a") == 0) |
|
|
1538 { |
|
|
1539 show_builtins++; |
|
|
1540 show_functions++; |
|
|
1541 show_variables++; |
|
|
1542 } |
|
|
1543 else if (strcmp (*argv, "-builtins") == 0 |
|
|
1544 || strcmp (*argv, "-b") == 0) |
|
|
1545 show_builtins++; |
|
|
1546 else if (strcmp (*argv, "-functions") == 0 |
|
|
1547 || strcmp (*argv, "-f") == 0) |
|
|
1548 show_functions++; |
|
|
1549 else if (strcmp (*argv, "-long") == 0 |
|
|
1550 || strcmp (*argv, "-l") == 0) |
|
|
1551 show_verbose++; |
|
|
1552 else if (strcmp (*argv, "-variables") == 0 |
|
|
1553 || strcmp (*argv, "-v") == 0) |
|
|
1554 show_variables++; |
|
|
1555 else |
|
|
1556 warning ("who: unrecognized option `%s'", *argv); |
|
|
1557 } |
|
|
1558 |
|
|
1559 // If the user specified -l and nothing else, show variables. If |
|
|
1560 // evaluating this at the top level, also show functions. |
|
|
1561 |
|
|
1562 if (show_verbose && ! (show_builtins || show_functions || show_variables)) |
|
|
1563 { |
|
|
1564 show_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
1565 show_variables = 1; |
|
|
1566 } |
|
|
1567 |
|
|
1568 ostrstream output_buf; |
|
|
1569 int pad_after = 0; |
|
|
1570 |
|
|
1571 if (show_builtins) |
|
|
1572 { |
|
|
1573 pad_after += maybe_list ("*** built-in variables:", |
|
|
1574 output_buf, show_verbose, global_sym_tab, |
|
|
1575 symbol_def::BUILTIN_VARIABLE, |
|
|
1576 SYMTAB_ALL_SCOPES); |
|
|
1577 |
|
|
1578 pad_after += maybe_list ("*** built-in functions:", |
|
|
1579 output_buf, show_verbose, global_sym_tab, |
|
|
1580 symbol_def::BUILTIN_FUNCTION, |
|
|
1581 SYMTAB_ALL_SCOPES); |
|
|
1582 } |
|
|
1583 |
|
|
1584 if (show_functions) |
|
|
1585 { |
|
|
1586 pad_after += maybe_list ("*** currently compiled functions:", |
|
|
1587 output_buf, show_verbose, global_sym_tab, |
|
|
1588 symbol_def::USER_FUNCTION, |
|
|
1589 SYMTAB_ALL_SCOPES); |
|
|
1590 } |
|
|
1591 |
|
|
1592 if (show_variables) |
|
|
1593 { |
|
|
1594 pad_after += maybe_list ("*** local user variables:", |
|
|
1595 output_buf, show_verbose, curr_sym_tab, |
|
|
1596 symbol_def::USER_VARIABLE, |
|
|
1597 SYMTAB_LOCAL_SCOPE); |
|
|
1598 |
|
|
1599 pad_after += maybe_list ("*** globally visible user variables:", |
|
|
1600 output_buf, show_verbose, curr_sym_tab, |
|
|
1601 symbol_def::USER_VARIABLE, |
|
|
1602 SYMTAB_GLOBAL_SCOPE); |
|
|
1603 } |
|
|
1604 |
|
|
1605 if (pad_after) |
|
|
1606 output_buf << "\n"; |
|
|
1607 |
|
|
1608 output_buf << ends; |
|
|
1609 maybe_page_output (output_buf); |
|
|
1610 |
|
|
1611 DELETE_ARGV; |
|
|
1612 |
|
|
1613 return retval; |
|
|
1614 } |
|
|
1615 |
|
|
1616 // XXX FIXME XXX -- should these really be here? |
|
|
1617 |
|
|
1618 char * |
|
|
1619 octave_home (void) |
|
|
1620 { |
|
|
1621 #ifdef RUN_IN_PLACE |
|
|
1622 static char *home = OCTAVE_HOME; |
|
|
1623 return home; |
|
|
1624 #else |
|
|
1625 static char *home = 0; |
|
|
1626 delete [] home; |
|
|
1627 char *oh = getenv ("OCTAVE_HOME"); |
|
|
1628 if (oh) |
|
|
1629 home = strsave (oh); |
|
|
1630 else |
|
|
1631 home = strsave (OCTAVE_HOME); |
|
|
1632 return home; |
|
|
1633 #endif |
|
|
1634 } |
|
|
1635 |
|
|
1636 char * |
|
|
1637 octave_lib_dir (void) |
|
|
1638 { |
|
|
1639 #ifdef RUN_IN_PLACE |
|
|
1640 static char *ol = OCTAVE_LIB_DIR; |
|
|
1641 return ol; |
|
|
1642 #else |
|
|
1643 static char *ol = 0; |
|
|
1644 delete [] ol; |
|
|
1645 char *oh = octave_home (); |
|
|
1646 char *tmp = strconcat (oh, "/lib/octave/"); |
|
|
1647 ol = strconcat (tmp, version_string); |
|
|
1648 delete [] tmp; |
|
|
1649 return ol; |
|
|
1650 #endif |
|
|
1651 } |
|
|
1652 |
|
|
1653 char * |
|
|
1654 octave_info_dir (void) |
|
|
1655 { |
|
|
1656 #ifdef RUN_IN_PLACE |
|
|
1657 static char *oi = OCTAVE_INFO_DIR; |
|
|
1658 return oi; |
|
|
1659 #else |
|
|
1660 static char *oi = 0; |
|
|
1661 delete [] oi; |
|
|
1662 char *oh = octave_home (); |
|
|
1663 oi = strconcat (oh, "/info/"); |
|
|
1664 return oi; |
|
|
1665 #endif |
|
|
1666 } |
|
|
1667 |
|
|
1668 /* |
|
|
1669 * Handle OCTAVE_PATH from the environment like TeX handles TEXINPUTS. |
|
|
1670 * If the path starts with `:', prepend the standard path. If it ends |
|
|
1671 * with `:' append the standard path. If it begins and ends with |
|
|
1672 * `:', do both (which is useless, but the luser asked for it...). |
|
|
1673 * |
|
|
1674 * This function may eventually be called more than once, so be |
|
|
1675 * careful not to create memory leaks. |
|
|
1676 */ |
|
|
1677 char * |
|
|
1678 default_path (void) |
|
|
1679 { |
|
|
1680 static char *pathstring = 0; |
|
|
1681 delete [] pathstring; |
|
|
1682 |
|
|
1683 static char *std_path = 0; |
|
|
1684 delete [] std_path; |
|
|
1685 |
|
|
1686 char *libdir = octave_lib_dir (); |
|
|
1687 |
|
|
1688 std_path = strconcat (".:", libdir); |
|
|
1689 |
|
|
1690 char *oct_path = getenv ("OCTAVE_PATH"); |
|
|
1691 |
|
|
1692 if (oct_path) |
|
|
1693 { |
|
|
1694 pathstring = strsave (oct_path); |
|
|
1695 |
|
|
1696 if (pathstring[0] == ':') |
|
|
1697 { |
|
|
1698 char *tmp = pathstring; |
|
|
1699 pathstring = strconcat (std_path, pathstring); |
|
|
1700 delete [] tmp; |
|
|
1701 } |
|
|
1702 |
|
|
1703 int tmp_len = strlen (pathstring); |
|
|
1704 if (pathstring[tmp_len-1] == ':') |
|
|
1705 { |
|
|
1706 char *tmp = pathstring; |
|
|
1707 pathstring = strconcat (pathstring, std_path); |
|
|
1708 delete [] tmp; |
|
|
1709 } |
|
|
1710 } |
|
|
1711 else |
|
|
1712 pathstring = strsave (std_path); |
|
|
1713 |
|
|
1714 return pathstring; |
|
|
1715 } |
|
|
1716 |
|
|
1717 char * |
|
|
1718 default_info_file (void) |
|
|
1719 { |
|
|
1720 static char *info_file_string = 0; |
|
|
1721 delete [] info_file_string; |
|
|
1722 char *oct_info_file = getenv ("OCTAVE_INFO_FILE"); |
|
|
1723 if (oct_info_file) |
|
|
1724 info_file_string = strsave (oct_info_file); |
|
|
1725 else |
|
|
1726 { |
|
|
1727 char *infodir = octave_info_dir (); |
|
|
1728 info_file_string = strconcat (infodir, "/octave.info"); |
|
|
1729 } |
|
|
1730 return info_file_string; |
|
|
1731 } |
|
|
1732 |
|
|
1733 char * |
|
|
1734 default_editor (void) |
|
|
1735 { |
|
|
1736 static char *editor_string = 0; |
|
|
1737 delete [] editor_string; |
|
|
1738 char *env_editor = getenv ("EDITOR"); |
|
|
1739 if (env_editor && *env_editor) |
|
|
1740 editor_string = strsave (env_editor); |
|
|
1741 else |
|
|
1742 editor_string = strsave ("vi"); |
|
|
1743 return editor_string; |
|
|
1744 } |
|
|
1745 |
|
|
1746 char * |
|
|
1747 get_site_defaults (void) |
|
|
1748 { |
|
|
1749 static char *sd = 0; |
|
|
1750 delete [] sd; |
|
|
1751 char *libdir = octave_lib_dir (); |
|
|
1752 sd = strconcat (libdir, "/octaverc"); |
|
|
1753 return sd; |
|
|
1754 } |
|
|
1755 |
|
|
1756 char * |
|
|
1757 default_pager (void) |
|
|
1758 { |
|
|
1759 static char *pager_binary = 0; |
|
|
1760 delete [] pager_binary; |
|
|
1761 char *pgr = getenv ("PAGER"); |
|
|
1762 if (pgr) |
|
|
1763 pager_binary = strsave (pgr); |
|
|
1764 else |
|
|
1765 #ifdef DEFAULT_PAGER |
|
|
1766 pager_binary = strsave (DEFAULT_PAGER); |
|
|
1767 #else |
|
|
1768 pager_binary = strsave (""); |
|
|
1769 #endif |
|
|
1770 |
|
|
1771 return pager_binary; |
|
|
1772 } |
|
|
1773 |
|
1
|
1774 /* |
|
|
1775 ;;; Local Variables: *** |
|
|
1776 ;;; mode: C++ *** |
|
|
1777 ;;; page-delimiter: "^/\\*" *** |
|
|
1778 ;;; End: *** |
|
|
1779 */ |
