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1
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1 /* |
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2 |
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2847
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3 Copyright (C) 1996, 1997 John W. Eaton |
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1
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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1315
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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1
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1192
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24 #include <config.h> |
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1
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25 #endif |
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26 |
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1468
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27 #include <cstdio> |
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1343
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28 #include <cstring> |
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605
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29 |
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1728
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30 #include <string> |
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31 |
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2926
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32 #include "file-stat.h" |
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33 #include "oct-env.h" |
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34 #include "glob-match.h" |
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1755
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35 #include "str-vec.h" |
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36 |
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2492
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37 #include <defaults.h> |
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1352
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38 #include "defun.h" |
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39 #include "dirfns.h" |
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40 #include "error.h" |
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2205
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41 #include "gripes.h" |
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1352
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42 #include "help.h" |
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3165
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43 #include "input.h" |
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1352
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44 #include "lex.h" |
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2926
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45 #include "oct-map.h" |
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46 #include "oct-obj.h" |
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47 #include "ov.h" |
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605
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48 #include "pager.h" |
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1352
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49 #include "parse.h" |
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2926
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50 #include "symtab.h" |
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2205
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51 #include "toplev.h" |
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1352
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52 #include "unwind-prot.h" |
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1
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53 #include "utils.h" |
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1352
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54 #include "variables.h" |
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2205
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55 |
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56 // Should Octave always check to see if function files have changed |
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57 // since they were last compiled? |
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2806
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58 static int Vignore_function_time_stamp; |
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2205
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59 |
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1
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60 // Symbol table for symbols at the top level. |
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581
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61 symbol_table *top_level_sym_tab = 0; |
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1
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62 |
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63 // Symbol table for the current scope. |
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581
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64 symbol_table *curr_sym_tab = 0; |
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1
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65 |
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66 // Symbol table for global symbols. |
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581
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67 symbol_table *global_sym_tab = 0; |
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1
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68 |
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593
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69 // Initialization. |
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70 |
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71 // Create the initial symbol tables and set the current scope at the |
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72 // top level. |
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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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581
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77 if (! global_sym_tab) |
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3005
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78 global_sym_tab = new symbol_table (2048); |
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195
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79 |
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581
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80 if (! top_level_sym_tab) |
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3005
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81 top_level_sym_tab = new symbol_table (4096); |
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195
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82 |
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83 curr_sym_tab = top_level_sym_tab; |
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84 } |
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85 |
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593
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86 // Attributes of variables and functions. |
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87 |
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88 // Is this variable a builtin? |
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89 |
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1827
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90 bool |
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1755
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91 is_builtin_variable (const string& name) |
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593
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92 { |
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2856
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93 symbol_record *sr = global_sym_tab->lookup (name); |
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593
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94 return (sr && sr->is_builtin_variable ()); |
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95 } |
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96 |
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97 // Is this a text-style function? |
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98 |
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1827
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99 bool |
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1755
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100 is_text_function_name (const string& s) |
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593
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101 { |
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102 symbol_record *sr = global_sym_tab->lookup (s); |
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103 return (sr && sr->is_text_function ()); |
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104 } |
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105 |
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3355
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106 // Is this a built-in function? |
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2294
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107 |
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108 bool |
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109 is_builtin_function_name (const string& s) |
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110 { |
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111 symbol_record *sr = global_sym_tab->lookup (s); |
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112 return (sr && sr->is_builtin_function ()); |
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113 } |
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114 |
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115 // Is this a mapper function? |
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116 |
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117 bool |
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118 is_mapper_function_name (const string& s) |
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119 { |
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120 symbol_record *sr = global_sym_tab->lookup (s); |
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121 return (sr && sr->is_mapper_function ()); |
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122 } |
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123 |
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593
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124 // Is this function globally in this scope? |
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125 |
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1827
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126 bool |
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1755
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127 is_globally_visible (const string& name) |
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593
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128 { |
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2856
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129 symbol_record *sr = curr_sym_tab->lookup (name); |
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593
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130 return (sr && sr->is_linked_to_global ()); |
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131 } |
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132 |
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2086
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133 // Is this octave_value a valid function? |
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593
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134 |
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2975
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135 octave_function * |
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3178
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136 is_valid_function (const string& fcn_name, const string& warn_for, bool warn) |
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593
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137 { |
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2975
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138 octave_function *ans = 0; |
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593
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139 |
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140 symbol_record *sr = 0; |
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1755
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141 |
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142 if (! fcn_name.empty ()) |
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593
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143 sr = lookup_by_name (fcn_name); |
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144 |
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145 if (sr) |
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2975
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146 { |
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147 octave_value tmp = sr->def (); |
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148 ans = tmp.function_value (true); |
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149 } |
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593
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150 |
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151 if (! sr || ! ans || ! sr->is_function ()) |
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152 { |
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153 if (warn) |
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154 error ("%s: the symbol `%s' is not valid as a function", |
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1755
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155 warn_for.c_str (), fcn_name.c_str ()); |
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593
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156 ans = 0; |
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157 } |
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158 |
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159 return ans; |
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160 } |
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161 |
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2975
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162 octave_function * |
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3178
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163 is_valid_function (const octave_value& arg, const string& warn_for, bool warn) |
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164 { |
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165 octave_function *ans = 0; |
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166 |
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167 string fcn_name; |
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168 |
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169 if (arg.is_string ()) |
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170 fcn_name = arg.string_value (); |
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171 |
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172 if (! error_state) |
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173 ans = is_valid_function (fcn_name, warn_for, warn); |
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174 else if (warn) |
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175 error ("%s: expecting function name as argument", warn_for.c_str ()); |
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176 |
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177 return ans; |
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178 } |
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179 |
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180 octave_function * |
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2796
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181 extract_function (const octave_value& arg, const string& warn_for, |
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182 const string& fname, const string& header, |
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183 const string& trailer) |
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184 { |
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2975
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185 octave_function *retval = 0; |
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2796
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186 |
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187 retval = is_valid_function (arg, warn_for, 0); |
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188 |
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189 if (! retval) |
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190 { |
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191 string s = arg.string_value (); |
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192 |
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193 string cmd = header; |
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194 cmd.append (s); |
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195 cmd.append (trailer); |
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196 |
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197 if (! error_state) |
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198 { |
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199 int parse_status; |
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200 |
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2898
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201 eval_string (cmd, true, parse_status); |
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2796
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202 |
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203 if (parse_status == 0) |
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204 { |
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205 retval = is_valid_function (fname, warn_for, 0); |
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206 |
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207 if (! retval) |
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208 { |
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209 error ("%s: `%s' is not valid as a function", |
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210 warn_for.c_str (), fname.c_str ()); |
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211 return retval; |
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212 } |
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213 } |
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214 else |
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215 error ("%s: `%s' is not valid as a function", |
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216 warn_for.c_str (), fname.c_str ()); |
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217 } |
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218 else |
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219 error ("%s: expecting first argument to be a string", |
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220 warn_for.c_str ()); |
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221 } |
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222 |
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223 return retval; |
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224 } |
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225 |
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2921
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226 string_vector |
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227 get_struct_elts (const string& text) |
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228 { |
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229 int n = 1; |
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230 |
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231 size_t pos = 0; |
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232 |
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233 size_t len = text.length (); |
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234 |
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235 while ((pos = text.find ('.', pos)) != NPOS) |
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236 { |
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237 if (++pos == len) |
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238 break; |
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239 |
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240 n++; |
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241 } |
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242 |
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243 string_vector retval (n); |
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244 |
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245 pos = 0; |
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246 |
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247 for (int i = 0; i < n; i++) |
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248 { |
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249 size_t len = text.find ('.', pos); |
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250 |
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251 if (len != NPOS) |
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252 len -= pos; |
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253 |
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254 retval[i] = text.substr (pos, len); |
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255 |
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256 if (len != NPOS) |
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257 pos += len + 1; |
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258 } |
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259 |
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260 return retval; |
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261 } |
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262 |
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263 string_vector |
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264 generate_struct_completions (const string& text, string& prefix, string& hint) |
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265 { |
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266 string_vector names; |
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267 |
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268 size_t pos = text.rfind ('.'); |
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269 |
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270 string id; |
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271 string_vector elts; |
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272 |
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273 if (pos == NPOS) |
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274 { |
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275 hint = text; |
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276 prefix = text; |
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277 elts.resize (1, text); |
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278 } |
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279 else |
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280 { |
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281 if (pos == text.length ()) |
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282 hint = ""; |
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283 else |
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284 hint = text.substr (pos+1); |
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285 |
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286 prefix = text.substr (0, pos); |
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287 |
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288 elts = get_struct_elts (prefix); |
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289 } |
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290 |
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291 id = elts[0]; |
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292 |
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293 symbol_record *sr = curr_sym_tab->lookup (id); |
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294 |
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295 if (! sr) |
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296 sr = global_sym_tab->lookup (id); |
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297 |
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298 if (sr && sr->is_defined ()) |
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299 { |
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2975
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300 octave_value tmp = sr->def (); |
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2921
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301 |
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2963
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302 // XXX FIXME XXX -- make this work for all types that can do |
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303 // structure reference operations. |
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2975
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304 if (tmp.is_map ()) |
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2921
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305 { |
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306 for (int i = 1; i < elts.length (); i++) |
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307 { |
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2975
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308 tmp = tmp.do_struct_elt_index_op (elts[i], true); |
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2921
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309 |
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2975
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310 if (! tmp.is_map ()) |
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2921
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311 break; |
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312 } |
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313 |
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2975
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314 if (tmp.is_map ()) |
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2921
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315 { |
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2975
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316 Octave_map m = tmp.map_value (); |
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2921
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317 |
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318 names = m.make_name_list (); |
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319 } |
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320 } |
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321 } |
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322 |
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323 return names; |
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324 } |
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325 |
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326 bool |
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327 looks_like_struct (const string& text) |
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328 { |
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329 bool retval = true; |
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330 |
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331 string_vector elts = get_struct_elts (text); |
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332 |
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333 string id = elts[0]; |
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334 |
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335 symbol_record *sr = curr_sym_tab->lookup (id); |
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336 |
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337 if (! sr) |
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338 sr = global_sym_tab->lookup (id); |
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339 |
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340 if (sr && sr->is_defined ()) |
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341 { |
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2975
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342 octave_value tmp = sr->def (); |
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2921
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343 |
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2963
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344 // XXX FIXME XXX -- should this work for all types that can do |
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345 // structure reference operations? |
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346 |
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2975
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347 if (tmp.is_map ()) |
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2921
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348 { |
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349 for (int i = 1; i < elts.length (); i++) |
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350 { |
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2975
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351 tmp = tmp.do_struct_elt_index_op (elts[i], true); |
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2921
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352 |
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2975
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353 if (! tmp.is_map ()) |
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2921
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354 { |
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355 retval = false; |
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356 break; |
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357 } |
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358 } |
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359 } |
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360 else |
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361 retval = false; |
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362 } |
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363 else |
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364 retval = false; |
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365 |
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366 return retval; |
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367 } |
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2796
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368 |
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1957
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369 DEFUN (is_global, args, , |
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593
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370 "is_global (X): return 1 if the string X names a global variable\n\ |
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371 otherwise, return 0.") |
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372 { |
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2086
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373 octave_value_list retval = 0.0; |
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593
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374 |
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712
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375 int nargin = args.length (); |
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376 |
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377 if (nargin != 1) |
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593
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378 { |
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379 print_usage ("is_global"); |
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380 return retval; |
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381 } |
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382 |
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1755
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383 string name = args(0).string_value (); |
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593
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384 |
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636
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385 if (error_state) |
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386 { |
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387 error ("is_global: expecting string argument"); |
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388 return retval; |
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389 } |
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390 |
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2856
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391 symbol_record *sr = curr_sym_tab->lookup (name); |
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593
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392 |
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2800
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393 retval = static_cast<double> (sr && sr->is_linked_to_global ()); |
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593
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394 |
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395 return retval; |
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396 } |
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397 |
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1957
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398 DEFUN (exist, args, , |
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593
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399 "exist (NAME): check if variable or file exists\n\ |
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400 \n\ |
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1564
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401 returns:\n\ |
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402 \n\ |
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403 0 : NAME is undefined\n\ |
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404 1 : NAME is a variable\n\ |
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405 2 : NAME is a function\n\ |
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406 3 : NAME is a .oct file in the current LOADPATH\n\ |
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3096
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407 5 : NAME is a built-in function\n\ |
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408 \n\ |
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409 This function also returns 2 if a regular file called NAME exists in\n\ |
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410 Octave's LOADPATH. If you want information about other types of\n\ |
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411 files, you should use some combination of the functions file_in_path\n\ |
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412 and stat instead.") |
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593
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413 { |
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2086
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414 octave_value_list retval; |
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593
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415 |
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712
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416 int nargin = args.length (); |
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417 |
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418 if (nargin != 1) |
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593
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419 { |
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420 print_usage ("exist"); |
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421 return retval; |
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422 } |
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423 |
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1755
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424 string name = args(0).string_value (); |
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593
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425 |
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636
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426 if (error_state) |
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427 { |
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428 error ("exist: expecting string argument"); |
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429 return retval; |
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430 } |
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431 |
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1755
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432 string struct_elts; |
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2790
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433 string symbol_name = name; |
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1755
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434 |
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435 size_t pos = name.find ('.'); |
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436 |
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2790
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437 if (pos != NPOS && pos > 0) |
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1277
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438 { |
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1755
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439 struct_elts = name.substr (pos+1); |
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2790
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440 symbol_name = name.substr (0, pos); |
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1277
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441 } |
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442 |
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2856
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443 symbol_record *sr = curr_sym_tab->lookup (symbol_name); |
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3238
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444 if (! (sr && (sr->is_defined () |
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445 || (curr_sym_tab != top_level_sym_tab)))) |
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2856
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446 sr = global_sym_tab->lookup (symbol_name); |
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593
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447 |
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448 retval = 0.0; |
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449 |
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450 if (sr && sr->is_variable () && sr->is_defined ()) |
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1277
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451 { |
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2390
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452 if (struct_elts.empty () || sr->is_map_element (struct_elts)) |
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453 retval = 1.0; |
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1277
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454 } |
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1421
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455 else if (sr && sr->is_builtin_function ()) |
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456 { |
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457 retval = 5.0; |
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458 } |
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459 else if (sr && sr->is_user_function ()) |
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460 { |
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461 retval = 2.0; |
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462 } |
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593
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463 else |
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464 { |
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1755
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465 string path = fcn_file_in_path (name); |
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466 |
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467 if (path.length () > 0) |
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593
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468 { |
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469 retval = 2.0; |
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470 } |
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471 else |
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472 { |
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1421
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473 path = oct_file_in_path (name); |
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1755
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474 |
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475 if (path.length () > 0) |
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1421
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476 { |
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477 retval = 3.0; |
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478 } |
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479 else |
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480 { |
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3096
|
481 string file_name = file_in_path (name, ""); |
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1766
|
482 |
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3096
|
483 if (! file_name.empty ()) |
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484 { |
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485 file_stat fs (file_name); |
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486 |
|
|
487 if (fs && fs.is_reg ()) |
|
|
488 retval = 2.0; |
|
|
489 } |
|
1421
|
490 } |
|
593
|
491 } |
|
|
492 } |
|
|
493 |
|
|
494 return retval; |
|
|
495 } |
|
|
496 |
|
581
|
497 // Is there a corresponding function file that is newer than the |
|
|
498 // symbol definition? |
|
|
499 |
|
2926
|
500 static bool |
|
1
|
501 symbol_out_of_date (symbol_record *sr) |
|
|
502 { |
|
2926
|
503 bool retval = false; |
|
195
|
504 |
|
2926
|
505 if (Vignore_function_time_stamp != 2 && sr) |
|
1
|
506 { |
|
2975
|
507 octave_value ans = sr->def (); |
|
|
508 |
|
3022
|
509 octave_function *tmp = ans.function_value (true); |
|
2975
|
510 |
|
3022
|
511 if (tmp) |
|
|
512 { |
|
|
513 string ff = tmp->fcn_file_name (); |
|
1755
|
514 |
|
3022
|
515 if (! (ff.empty () |
|
|
516 || (Vignore_function_time_stamp |
|
|
517 && tmp->is_system_fcn_file ()))) |
|
|
518 { |
|
3165
|
519 if (tmp->time_checked () < Vlast_prompt_time) |
|
|
520 { |
|
|
521 time_t tp = tmp->time_parsed (); |
|
2975
|
522 |
|
3325
|
523 string fname; |
|
|
524 |
|
|
525 if (tmp->is_dld_function ()) |
|
|
526 fname = ff; |
|
|
527 else |
|
|
528 fname = fcn_file_in_path (ff); |
|
1755
|
529 |
|
3255
|
530 tmp->mark_fcn_file_up_to_date (octave_time ()); |
|
3165
|
531 |
|
|
532 file_stat fs (fname); |
|
3022
|
533 |
|
3165
|
534 if (fs && fs.is_newer (tp)) |
|
|
535 retval = true; |
|
|
536 } |
|
1
|
537 } |
|
|
538 } |
|
|
539 } |
|
2926
|
540 |
|
|
541 return retval; |
|
1
|
542 } |
|
|
543 |
|
1827
|
544 bool |
|
2856
|
545 lookup (symbol_record *sym_rec, bool exec_script) |
|
581
|
546 { |
|
1827
|
547 bool script_executed = false; |
|
581
|
548 |
|
|
549 if (! sym_rec->is_linked_to_global ()) |
|
|
550 { |
|
|
551 if (sym_rec->is_defined ()) |
|
|
552 { |
|
|
553 if (sym_rec->is_function () && symbol_out_of_date (sym_rec)) |
|
1271
|
554 script_executed = load_fcn_from_file (sym_rec, exec_script); |
|
581
|
555 } |
|
|
556 else if (! sym_rec->is_formal_parameter ()) |
|
|
557 { |
|
|
558 link_to_builtin_or_function (sym_rec); |
|
1271
|
559 |
|
581
|
560 if (! sym_rec->is_defined ()) |
|
1271
|
561 script_executed = load_fcn_from_file (sym_rec, exec_script); |
|
581
|
562 else if (sym_rec->is_function () && symbol_out_of_date (sym_rec)) |
|
1271
|
563 script_executed = load_fcn_from_file (sym_rec, exec_script); |
|
581
|
564 } |
|
|
565 } |
|
|
566 |
|
1271
|
567 return script_executed; |
|
581
|
568 } |
|
|
569 |
|
|
570 // Get the symbol record for the given name that is visible in the |
|
|
571 // current scope. Reread any function definitions that appear to be |
|
|
572 // out of date. If a function is available in a file but is not |
|
|
573 // currently loaded, this will load it and insert the name in the |
|
|
574 // current symbol table. |
|
|
575 |
|
|
576 symbol_record * |
|
2856
|
577 lookup_by_name (const string& nm, bool exec_script) |
|
581
|
578 { |
|
2856
|
579 symbol_record *sym_rec = curr_sym_tab->lookup (nm, true); |
|
581
|
580 |
|
|
581 lookup (sym_rec, exec_script); |
|
|
582 |
|
|
583 return sym_rec; |
|
|
584 } |
|
|
585 |
|
2849
|
586 octave_value |
|
|
587 get_global_value (const string& nm) |
|
|
588 { |
|
|
589 octave_value retval; |
|
|
590 |
|
|
591 symbol_record *sr = global_sym_tab->lookup (nm); |
|
|
592 |
|
|
593 if (sr) |
|
|
594 { |
|
2975
|
595 octave_value sr_def = sr->def (); |
|
2849
|
596 |
|
2975
|
597 if (sr_def.is_undefined ()) |
|
2849
|
598 error ("get_global_by_name: undefined symbol `%s'", nm.c_str ()); |
|
3088
|
599 else |
|
|
600 retval = sr_def; |
|
2849
|
601 } |
|
|
602 else |
|
|
603 error ("get_global_by_name: unknown symbol `%s'", nm.c_str ()); |
|
|
604 |
|
|
605 return retval; |
|
|
606 } |
|
|
607 |
|
|
608 void |
|
|
609 set_global_value (const string& nm, const octave_value& val) |
|
|
610 { |
|
2856
|
611 symbol_record *sr = global_sym_tab->lookup (nm, true); |
|
2849
|
612 |
|
|
613 if (sr) |
|
|
614 sr->define (val); |
|
|
615 else |
|
|
616 panic_impossible (); |
|
|
617 } |
|
|
618 |
|
593
|
619 // Variable values. |
|
195
|
620 |
|
581
|
621 // Look for the given name in the global symbol table. If it refers |
|
|
622 // to a string, return a new copy. If not, return 0; |
|
|
623 |
|
1755
|
624 string |
|
|
625 builtin_string_variable (const string& name) |
|
1
|
626 { |
|
2856
|
627 symbol_record *sr = global_sym_tab->lookup (name); |
|
195
|
628 |
|
1271
|
629 // It is a prorgramming error to look for builtins that aren't. |
|
195
|
630 |
|
529
|
631 assert (sr); |
|
195
|
632 |
|
1755
|
633 string retval; |
|
1
|
634 |
|
2975
|
635 octave_value val = sr->def (); |
|
195
|
636 |
|
2975
|
637 if (! error_state && val.is_string ()) |
|
|
638 retval = val.string_value (); |
|
1
|
639 |
|
|
640 return retval; |
|
|
641 } |
|
|
642 |
|
581
|
643 // Look for the given name in the global symbol table. If it refers |
|
1504
|
644 // to a real scalar, place the value in d and return 1. Otherwise, |
|
|
645 // return 0. |
|
581
|
646 |
|
1
|
647 int |
|
1755
|
648 builtin_real_scalar_variable (const string& name, double& d) |
|
1
|
649 { |
|
1504
|
650 int status = 0; |
|
2856
|
651 symbol_record *sr = global_sym_tab->lookup (name); |
|
195
|
652 |
|
1271
|
653 // It is a prorgramming error to look for builtins that aren't. |
|
195
|
654 |
|
529
|
655 assert (sr); |
|
1
|
656 |
|
2975
|
657 octave_value val = sr->def (); |
|
195
|
658 |
|
2975
|
659 if (! error_state && val.is_scalar_type ()) |
|
|
660 { |
|
|
661 d = val.double_value (); |
|
|
662 status = 1; |
|
1
|
663 } |
|
|
664 |
|
|
665 return status; |
|
|
666 } |
|
|
667 |
|
1093
|
668 // Look for the given name in the global symbol table. |
|
|
669 |
|
2086
|
670 octave_value |
|
1755
|
671 builtin_any_variable (const string& name) |
|
1093
|
672 { |
|
2856
|
673 symbol_record *sr = global_sym_tab->lookup (name); |
|
1093
|
674 |
|
1271
|
675 // It is a prorgramming error to look for builtins that aren't. |
|
1093
|
676 |
|
|
677 assert (sr); |
|
|
678 |
|
2975
|
679 return sr->def (); |
|
1093
|
680 } |
|
|
681 |
|
593
|
682 // Global stuff and links to builtin variables and functions. |
|
|
683 |
|
581
|
684 // Make the definition of the symbol record sr be the same as the |
|
|
685 // definition of the global variable of the same name, creating it if |
|
1418
|
686 // it doesn't already exist. |
|
581
|
687 |
|
195
|
688 void |
|
|
689 link_to_global_variable (symbol_record *sr) |
|
|
690 { |
|
2975
|
691 if (! sr->is_linked_to_global ()) |
|
195
|
692 { |
|
2975
|
693 sr->mark_as_linked_to_global (); |
|
195
|
694 |
|
2975
|
695 if (! error_state) |
|
|
696 { |
|
|
697 string nm = sr->name (); |
|
2846
|
698 |
|
2975
|
699 symbol_record *gsr = global_sym_tab->lookup (nm, true); |
|
|
700 |
|
|
701 // There must be a better way to do this. XXX FIXME XXX |
|
195
|
702 |
|
2975
|
703 if (sr->is_variable ()) |
|
|
704 gsr->define (sr->def ()); |
|
|
705 else |
|
|
706 sr->clear (); |
|
1271
|
707 |
|
2975
|
708 // Make sure this symbol is a variable. |
|
2900
|
709 |
|
2975
|
710 if (! gsr->is_variable ()) |
|
|
711 gsr->define (octave_value ()); |
|
2900
|
712 |
|
2975
|
713 sr->alias (gsr, 1); |
|
|
714 } |
|
195
|
715 } |
|
|
716 } |
|
|
717 |
|
581
|
718 // Make the definition of the symbol record sr be the same as the |
|
|
719 // definition of the builtin variable of the same name. |
|
|
720 |
|
|
721 // Make the definition of the symbol record sr be the same as the |
|
3258
|
722 // definition of the builtin variable, constant, or function, or user |
|
|
723 // function of the same name, provided that the name has not been used |
|
|
724 // as a formal parameter. |
|
581
|
725 |
|
195
|
726 void |
|
|
727 link_to_builtin_or_function (symbol_record *sr) |
|
|
728 { |
|
2856
|
729 symbol_record *tmp_sym = global_sym_tab->lookup (sr->name ()); |
|
195
|
730 |
|
529
|
731 if (tmp_sym |
|
3258
|
732 && (tmp_sym->is_builtin_variable () |
|
|
733 || tmp_sym->is_builtin_constant () |
|
|
734 || tmp_sym->is_function ()) |
|
529
|
735 && ! tmp_sym->is_formal_parameter ()) |
|
|
736 sr->alias (tmp_sym); |
|
195
|
737 } |
|
|
738 |
|
581
|
739 // Force a link to a function in the current symbol table. This is |
|
|
740 // used just after defining a function to avoid different behavior |
|
|
741 // depending on whether or not the function has been evaluated after |
|
|
742 // being defined. |
|
|
743 // |
|
|
744 // Return without doing anything if there isn't a function with the |
|
|
745 // given name defined in the global symbol table. |
|
|
746 |
|
195
|
747 void |
|
1755
|
748 force_link_to_function (const string& id_name) |
|
195
|
749 { |
|
2856
|
750 symbol_record *gsr = global_sym_tab->lookup (id_name, true); |
|
195
|
751 if (gsr->is_function ()) |
|
|
752 { |
|
|
753 curr_sym_tab->clear (id_name); |
|
2856
|
754 symbol_record *csr = curr_sym_tab->lookup (id_name, true); |
|
195
|
755 csr->alias (gsr); |
|
|
756 } |
|
|
757 } |
|
|
758 |
|
2294
|
759 DEFUN (document, args, , |
|
|
760 "document (NAME, STRING)\n\ |
|
593
|
761 \n\ |
|
|
762 Associate a cryptic message with a variable name.") |
|
|
763 { |
|
2294
|
764 octave_value retval; |
|
1755
|
765 |
|
2294
|
766 int nargin = args.length (); |
|
1755
|
767 |
|
2294
|
768 if (nargin == 2) |
|
593
|
769 { |
|
2294
|
770 string name = args(0).string_value (); |
|
593
|
771 |
|
2294
|
772 if (! error_state) |
|
593
|
773 { |
|
2294
|
774 string help = args(1).string_value (); |
|
593
|
775 |
|
2294
|
776 if (! error_state) |
|
|
777 { |
|
|
778 if (is_builtin_variable (name) |
|
|
779 || is_text_function_name (name) |
|
|
780 || is_mapper_function_name (name) |
|
|
781 || is_builtin_function_name (name)) |
|
|
782 error ("document: can't redefine help for built-in variables and functions"); |
|
|
783 else |
|
|
784 { |
|
2856
|
785 symbol_record *sym_rec = curr_sym_tab->lookup (name); |
|
2294
|
786 |
|
|
787 if (sym_rec) |
|
|
788 sym_rec->document (help); |
|
|
789 else |
|
|
790 error ("document: no such symbol `%s'", name.c_str ()); |
|
|
791 } |
|
|
792 } |
|
593
|
793 } |
|
|
794 } |
|
|
795 else |
|
|
796 print_usage ("document"); |
|
|
797 |
|
|
798 return retval; |
|
|
799 } |
|
|
800 |
|
2086
|
801 static octave_value_list |
|
1755
|
802 do_who (int argc, const string_vector& argv) |
|
529
|
803 { |
|
2086
|
804 octave_value_list retval; |
|
529
|
805 |
|
2856
|
806 bool show_builtins = false; |
|
3248
|
807 bool show_functions = false; |
|
|
808 bool show_variables = false; |
|
2856
|
809 bool show_verbose = false; |
|
529
|
810 |
|
1755
|
811 string my_name = argv[0]; |
|
584
|
812 |
|
1857
|
813 int i; |
|
|
814 for (i = 1; i < argc; i++) |
|
529
|
815 { |
|
1755
|
816 if (argv[i] == "-all" || argv[i] == "-a") |
|
529
|
817 { |
|
2856
|
818 show_builtins = true; |
|
|
819 show_functions = true; |
|
|
820 show_variables = true; |
|
529
|
821 } |
|
1755
|
822 else if (argv[i] == "-builtins" || argv[i] == "-b") |
|
2856
|
823 show_builtins = true; |
|
1755
|
824 else if (argv[i] == "-functions" || argv[i] == "-f") |
|
2856
|
825 show_functions = true; |
|
1755
|
826 else if (argv[i] == "-long" || argv[i] == "-l") |
|
2856
|
827 show_verbose = true; |
|
1755
|
828 else if (argv[i] == "-variables" || argv[i] == "-v") |
|
2856
|
829 show_variables = true; |
|
1755
|
830 else if (argv[i][0] == '-') |
|
|
831 warning ("%s: unrecognized option `%s'", my_name.c_str (), |
|
|
832 argv[i].c_str ()); |
|
529
|
833 else |
|
867
|
834 break; |
|
529
|
835 } |
|
|
836 |
|
3248
|
837 // If no options were specified to select the type of symbol to |
|
|
838 // display, then set defaults. |
|
|
839 |
|
|
840 if (! (show_builtins || show_functions || show_variables)) |
|
|
841 { |
|
|
842 show_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
843 show_variables = true; |
|
|
844 } |
|
|
845 |
|
1857
|
846 int npats = argc - i; |
|
|
847 string_vector pats (npats); |
|
|
848 for (int j = 0; j < npats; j++) |
|
|
849 pats[j] = argv[i+j]; |
|
|
850 |
|
1271
|
851 // If the user specified -l and nothing else, show variables. If |
|
|
852 // evaluating this at the top level, also show functions. |
|
529
|
853 |
|
|
854 if (show_verbose && ! (show_builtins || show_functions || show_variables)) |
|
|
855 { |
|
|
856 show_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
857 show_variables = 1; |
|
|
858 } |
|
|
859 |
|
|
860 int pad_after = 0; |
|
|
861 |
|
|
862 if (show_builtins) |
|
|
863 { |
|
3011
|
864 pad_after += global_sym_tab->maybe_list |
|
3259
|
865 ("*** built-in constants:", pats, octave_stdout, |
|
|
866 show_verbose, symbol_record::BUILTIN_CONSTANT, SYMTAB_ALL_SCOPES); |
|
|
867 |
|
|
868 pad_after += global_sym_tab->maybe_list |
|
3013
|
869 ("*** built-in variables:", pats, octave_stdout, |
|
3011
|
870 show_verbose, symbol_record::BUILTIN_VARIABLE, SYMTAB_ALL_SCOPES); |
|
529
|
871 |
|
3011
|
872 pad_after += global_sym_tab->maybe_list |
|
3013
|
873 ("*** built-in functions:", pats, octave_stdout, |
|
3011
|
874 show_verbose, symbol_record::BUILTIN_FUNCTION, SYMTAB_ALL_SCOPES); |
|
529
|
875 } |
|
|
876 |
|
|
877 if (show_functions) |
|
|
878 { |
|
3011
|
879 pad_after += global_sym_tab->maybe_list |
|
3013
|
880 ("*** currently compiled functions:", pats, |
|
3011
|
881 octave_stdout, show_verbose, symbol_record::USER_FUNCTION, |
|
|
882 SYMTAB_ALL_SCOPES); |
|
529
|
883 } |
|
|
884 |
|
|
885 if (show_variables) |
|
|
886 { |
|
3011
|
887 pad_after += curr_sym_tab->maybe_list |
|
3013
|
888 ("*** local user variables:", pats, octave_stdout, |
|
3011
|
889 show_verbose, symbol_record::USER_VARIABLE, SYMTAB_LOCAL_SCOPE); |
|
529
|
890 |
|
3011
|
891 pad_after += curr_sym_tab->maybe_list |
|
3013
|
892 ("*** globally visible user variables:", pats, |
|
3011
|
893 octave_stdout, show_verbose, symbol_record::USER_VARIABLE, |
|
|
894 SYMTAB_GLOBAL_SCOPE); |
|
529
|
895 } |
|
|
896 |
|
|
897 if (pad_after) |
|
2095
|
898 octave_stdout << "\n"; |
|
529
|
899 |
|
581
|
900 return retval; |
|
|
901 } |
|
|
902 |
|
1957
|
903 DEFUN_TEXT (who, args, , |
|
581
|
904 "who [-all] [-builtins] [-functions] [-long] [-variables]\n\ |
|
|
905 \n\ |
|
|
906 List currently defined symbol(s). Options may be shortened to one\n\ |
|
|
907 character, but may not be combined.") |
|
|
908 { |
|
2086
|
909 octave_value_list retval; |
|
581
|
910 |
|
1755
|
911 int argc = args.length () + 1; |
|
|
912 |
|
1968
|
913 string_vector argv = args.make_argv ("who"); |
|
1755
|
914 |
|
|
915 if (error_state) |
|
|
916 return retval; |
|
581
|
917 |
|
1488
|
918 retval = do_who (argc, argv); |
|
581
|
919 |
|
529
|
920 return retval; |
|
|
921 } |
|
|
922 |
|
1957
|
923 DEFUN_TEXT (whos, args, , |
|
581
|
924 "whos [-all] [-builtins] [-functions] [-long] [-variables]\n\ |
|
|
925 \n\ |
|
|
926 List currently defined symbol(s). Options may be shortened to one\n\ |
|
|
927 character, but may not be combined.") |
|
|
928 { |
|
2086
|
929 octave_value_list retval; |
|
581
|
930 |
|
712
|
931 int nargin = args.length (); |
|
|
932 |
|
2086
|
933 octave_value_list tmp_args; |
|
742
|
934 for (int i = nargin; i > 0; i--) |
|
|
935 tmp_args(i) = args(i-1); |
|
|
936 tmp_args(0) = "-long"; |
|
581
|
937 |
|
742
|
938 int argc = tmp_args.length () + 1; |
|
1755
|
939 |
|
1980
|
940 string_vector argv = tmp_args.make_argv ("whos"); |
|
581
|
941 |
|
|
942 if (error_state) |
|
|
943 return retval; |
|
|
944 |
|
1488
|
945 retval = do_who (argc, argv); |
|
581
|
946 |
|
|
947 return retval; |
|
|
948 } |
|
|
949 |
|
593
|
950 // Defining variables. |
|
|
951 |
|
1162
|
952 void |
|
2856
|
953 bind_ans (const octave_value& val, bool print) |
|
1162
|
954 { |
|
2856
|
955 static symbol_record *sr = global_sym_tab->lookup ("ans", true); |
|
1162
|
956 |
|
2978
|
957 if (val.is_defined ()) |
|
|
958 { |
|
|
959 sr->define (val); |
|
1162
|
960 |
|
2978
|
961 if (print) |
|
|
962 val.print_with_name (octave_stdout, "ans"); |
|
|
963 } |
|
1162
|
964 } |
|
|
965 |
|
3259
|
966 // Give a global constant a definition. This will insert the symbol |
|
|
967 // in the global table if necessary. |
|
|
968 |
|
|
969 // How is this different than install_builtin_constant? Are both |
|
|
970 // functions needed? |
|
|
971 |
|
|
972 void |
|
|
973 bind_builtin_constant (const string& name, const octave_value& val, |
|
|
974 bool protect, bool eternal, const string& help) |
|
|
975 { |
|
|
976 symbol_record *sym_rec = global_sym_tab->lookup (name, true); |
|
|
977 sym_rec->unprotect (); |
|
|
978 |
|
|
979 string tmp_help = help.empty () ? sym_rec->help () : help; |
|
|
980 |
|
|
981 sym_rec->define_builtin_const (val); |
|
|
982 |
|
|
983 sym_rec->document (tmp_help); |
|
|
984 |
|
|
985 if (protect) |
|
|
986 sym_rec->protect (); |
|
|
987 |
|
|
988 if (eternal) |
|
|
989 sym_rec->make_eternal (); |
|
|
990 } |
|
|
991 |
|
593
|
992 // Give a global variable a definition. This will insert the symbol |
|
|
993 // in the global table if necessary. |
|
|
994 |
|
|
995 // How is this different than install_builtin_variable? Are both |
|
|
996 // functions needed? |
|
|
997 |
|
|
998 void |
|
2390
|
999 bind_builtin_variable (const string& varname, const octave_value& val, |
|
2953
|
1000 bool protect, bool eternal, |
|
3005
|
1001 symbol_record::change_function chg_fcn, |
|
1755
|
1002 const string& help) |
|
593
|
1003 { |
|
2856
|
1004 symbol_record *sr = global_sym_tab->lookup (varname, true); |
|
593
|
1005 |
|
1271
|
1006 // It is a programming error for a builtin symbol to be missing. |
|
|
1007 // Besides, we just inserted it, so it must be there. |
|
593
|
1008 |
|
|
1009 assert (sr); |
|
|
1010 |
|
|
1011 sr->unprotect (); |
|
|
1012 |
|
1271
|
1013 // Must do this before define, since define will call the special |
|
|
1014 // variable function only if it knows about it, and it needs to, so |
|
|
1015 // that user prefs can be properly initialized. |
|
593
|
1016 |
|
3005
|
1017 if (chg_fcn) |
|
|
1018 sr->set_change_function (chg_fcn); |
|
593
|
1019 |
|
|
1020 sr->define_builtin_var (val); |
|
|
1021 |
|
|
1022 if (protect) |
|
|
1023 sr->protect (); |
|
|
1024 |
|
|
1025 if (eternal) |
|
|
1026 sr->make_eternal (); |
|
|
1027 |
|
1755
|
1028 sr->document (help); |
|
529
|
1029 } |
|
|
1030 |
|
593
|
1031 // Deleting names from the symbol tables. |
|
|
1032 |
|
1957
|
1033 DEFUN_TEXT (clear, args, , |
|
668
|
1034 "clear [-x] [name ...]\n\ |
|
|
1035 \n\ |
|
|
1036 Clear symbol(s) matching a list of globbing patterns.\n\ |
|
593
|
1037 \n\ |
|
2802
|
1038 If no arguments are given, clear all user-defined variables and\n\ |
|
668
|
1039 functions.\n\ |
|
|
1040 \n\ |
|
|
1041 With -x, exclude the named variables") |
|
529
|
1042 { |
|
2086
|
1043 octave_value_list retval; |
|
593
|
1044 |
|
1755
|
1045 int argc = args.length () + 1; |
|
593
|
1046 |
|
1968
|
1047 string_vector argv = args.make_argv ("clear"); |
|
1755
|
1048 |
|
|
1049 if (error_state) |
|
|
1050 return retval; |
|
668
|
1051 |
|
1271
|
1052 // Always clear the local table, but don't clear currently compiled |
|
|
1053 // functions unless we are at the top level. (Allowing that to |
|
|
1054 // happen inside functions would result in pretty odd behavior...) |
|
593
|
1055 |
|
2856
|
1056 bool clear_user_functions = (curr_sym_tab == top_level_sym_tab); |
|
593
|
1057 |
|
1755
|
1058 if (argc == 1) |
|
593
|
1059 { |
|
|
1060 curr_sym_tab->clear (); |
|
|
1061 global_sym_tab->clear (clear_user_functions); |
|
|
1062 } |
|
529
|
1063 else |
|
|
1064 { |
|
668
|
1065 int exclusive = 0; |
|
|
1066 |
|
1755
|
1067 int idx = 1; |
|
|
1068 |
|
|
1069 if (argc > 1) |
|
668
|
1070 { |
|
1755
|
1071 if (argv[idx] == "-x") |
|
3125
|
1072 { |
|
|
1073 idx++; |
|
|
1074 exclusive = 1; |
|
|
1075 } |
|
668
|
1076 } |
|
|
1077 |
|
1755
|
1078 string_vector lvars; |
|
|
1079 string_vector gvars; |
|
|
1080 string_vector fcns; |
|
668
|
1081 |
|
|
1082 if (argc > 0) |
|
593
|
1083 { |
|
3013
|
1084 string_vector tmp; |
|
|
1085 |
|
3325
|
1086 lvars = curr_sym_tab->name_list |
|
3355
|
1087 (tmp, false, SYMTAB_VARIABLES, SYMTAB_LOCAL_SCOPE); |
|
668
|
1088 |
|
3325
|
1089 gvars = curr_sym_tab->name_list |
|
3355
|
1090 (tmp, false, SYMTAB_VARIABLES, SYMTAB_GLOBAL_SCOPE); |
|
668
|
1091 |
|
3325
|
1092 fcns = global_sym_tab->name_list |
|
3355
|
1093 (tmp, false, |
|
3325
|
1094 symbol_record::USER_FUNCTION|symbol_record::DLD_FUNCTION, |
|
|
1095 SYMTAB_ALL_SCOPES); |
|
668
|
1096 } |
|
|
1097 |
|
2438
|
1098 // XXX FIXME XXX -- this needs to be optimized to avoid the |
|
|
1099 // pattern matching code if the string doesn't contain any |
|
|
1100 // globbing patterns. |
|
|
1101 |
|
1970
|
1102 for (int k = idx; k < argc; k++) |
|
668
|
1103 { |
|
1755
|
1104 string patstr = argv[k]; |
|
668
|
1105 |
|
1755
|
1106 if (! patstr.empty ()) |
|
593
|
1107 { |
|
1792
|
1108 glob_match pattern (patstr); |
|
1755
|
1109 |
|
3355
|
1110 int lcount = lvars.length (); |
|
|
1111 |
|
|
1112 for (int i = 0; i < lcount; i++) |
|
593
|
1113 { |
|
1755
|
1114 string nm = lvars[i]; |
|
1792
|
1115 int match = pattern.match (nm); |
|
668
|
1116 if ((exclusive && ! match) || (! exclusive && match)) |
|
|
1117 curr_sym_tab->clear (nm); |
|
593
|
1118 } |
|
529
|
1119 |
|
3355
|
1120 int gcount = gvars.length (); |
|
|
1121 for (int i = 0; i < gcount; i++) |
|
593
|
1122 { |
|
1755
|
1123 string nm = gvars[i]; |
|
1792
|
1124 int match = pattern.match (nm); |
|
668
|
1125 if ((exclusive && ! match) || (! exclusive && match)) |
|
593
|
1126 { |
|
3355
|
1127 int count = curr_sym_tab->clear (nm); |
|
593
|
1128 if (count > 0) |
|
668
|
1129 global_sym_tab->clear (nm, clear_user_functions); |
|
593
|
1130 } |
|
|
1131 } |
|
529
|
1132 |
|
3355
|
1133 int fcount = fcns.length (); |
|
|
1134 for (int i = 0; i < fcount; i++) |
|
593
|
1135 { |
|
1755
|
1136 string nm = fcns[i]; |
|
1792
|
1137 int match = pattern.match (nm); |
|
668
|
1138 if ((exclusive && ! match) || (! exclusive && match)) |
|
593
|
1139 { |
|
3355
|
1140 curr_sym_tab->clear (nm); |
|
864
|
1141 global_sym_tab->clear (nm, clear_user_functions); |
|
593
|
1142 } |
|
|
1143 } |
|
|
1144 } |
|
|
1145 } |
|
|
1146 } |
|
|
1147 |
|
|
1148 return retval; |
|
529
|
1149 } |
|
|
1150 |
|
3005
|
1151 DEFUN (__dump_symtab_info__, args, , |
|
|
1152 "__dump_symtab_info__ (): print raw symbol table statistices") |
|
|
1153 { |
|
|
1154 octave_value_list retval; |
|
|
1155 |
|
|
1156 int nargin = args.length (); |
|
|
1157 |
|
|
1158 if (nargin == 1) |
|
|
1159 { |
|
|
1160 string arg = args(0).string_value (); |
|
|
1161 |
|
|
1162 if (arg == "global") |
|
|
1163 global_sym_tab->print_stats (); |
|
|
1164 else |
|
|
1165 print_usage ("__dump_symtab_info__"); |
|
|
1166 } |
|
|
1167 else if (nargin == 0) |
|
|
1168 curr_sym_tab->print_stats (); |
|
|
1169 else |
|
|
1170 print_usage ("__dump_symtab_info__"); |
|
|
1171 |
|
|
1172 return retval; |
|
|
1173 } |
|
|
1174 |
|
3239
|
1175 DEFUN (__dump_symbol_info__, args, , |
|
|
1176 "__dump_symbol_info__ (NAME)") |
|
|
1177 { |
|
|
1178 octave_value_list retval; |
|
|
1179 |
|
|
1180 int nargin = args.length (); |
|
|
1181 |
|
|
1182 if (nargin == 1) |
|
|
1183 { |
|
|
1184 string symbol_name = args(0).string_value (); |
|
|
1185 |
|
|
1186 if (! error_state) |
|
|
1187 { |
|
|
1188 symbol_record *sr = curr_sym_tab->lookup (symbol_name); |
|
|
1189 |
|
|
1190 if (sr) |
|
|
1191 sr->dump_symbol_info (); |
|
|
1192 else |
|
|
1193 error ("__dymp_symbol_info__: symbol %s not found", |
|
|
1194 symbol_name.c_str ()); |
|
|
1195 } |
|
|
1196 else |
|
|
1197 print_usage ("__dump_symbol_info__"); |
|
|
1198 } |
|
|
1199 else |
|
|
1200 print_usage ("__dump_symbol_info__"); |
|
|
1201 |
|
|
1202 return retval; |
|
|
1203 } |
|
|
1204 |
|
3016
|
1205 // XXX FIXME XXX -- some of these should do their own checking to be |
|
|
1206 // able to provide more meaningful warning or error messages. |
|
|
1207 |
|
|
1208 static int |
|
|
1209 ignore_function_time_stamp (void) |
|
|
1210 { |
|
|
1211 int pref = 0; |
|
|
1212 |
|
|
1213 string val = builtin_string_variable ("ignore_function_time_stamp"); |
|
|
1214 |
|
|
1215 if (! val.empty ()) |
|
|
1216 { |
|
|
1217 if (val.compare ("all", 0, 3) == 0) |
|
|
1218 pref = 2; |
|
|
1219 if (val.compare ("system", 0, 6) == 0) |
|
|
1220 pref = 1; |
|
|
1221 } |
|
|
1222 |
|
|
1223 Vignore_function_time_stamp = pref; |
|
|
1224 |
|
|
1225 return 0; |
|
|
1226 } |
|
|
1227 |
|
|
1228 // XXX FIXME XXX -- there still may be better places for some of these |
|
|
1229 // to be defined. |
|
|
1230 |
|
|
1231 void |
|
|
1232 symbols_of_variables (void) |
|
|
1233 { |
|
3258
|
1234 DEFVAR (ans, , 0, |
|
3016
|
1235 ""); |
|
|
1236 |
|
3258
|
1237 DEFVAR (ignore_function_time_stamp, "system", ignore_function_time_stamp, |
|
3016
|
1238 "don't check to see if function files have changed since they were\n\ |
|
3020
|
1239 last compiled. Possible values are \"system\" and \"all\""); |
|
3016
|
1240 } |
|
|
1241 |
|
1
|
1242 /* |
|
|
1243 ;;; Local Variables: *** |
|
|
1244 ;;; mode: C++ *** |
|
|
1245 ;;; End: *** |
|
|
1246 */ |
