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1
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1 /* |
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2 |
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1884
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3 Copyright (C) 1996 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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1315
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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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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1343
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27 #include <cfloat> |
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2144
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28 #include <cmath> |
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1468
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29 #include <cstdio> |
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1343
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30 #include <cstring> |
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605
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31 |
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1728
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32 #include <string> |
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33 |
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2095
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34 #include <iostream.h> |
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1350
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35 #include <strstream.h> |
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36 |
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37 #ifdef HAVE_UNISTD_H |
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1
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38 #include <sys/types.h> |
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39 #include <unistd.h> |
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40 #endif |
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41 |
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1465
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42 #include <readline/readline.h> |
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43 |
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1792
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44 #include "file-ops.h" |
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45 #include "oct-glob.h" |
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1755
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46 #include "str-vec.h" |
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47 |
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605
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48 #include "defaults.h" |
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2205
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49 #include "data.h" |
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1352
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50 #include "defun.h" |
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51 #include "dirfns.h" |
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704
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52 #include "dynamic-ld.h" |
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1352
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53 #include "error.h" |
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2205
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54 #include "file-io.h" |
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2233
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55 #include "fn-cache.h" |
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2205
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56 #include "gripes.h" |
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1352
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57 #include "help.h" |
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58 #include "input.h" |
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59 #include "lex.h" |
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2205
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60 #include "load-save.h" |
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1742
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61 #include "mappers.h" |
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62 #include "oct-hist.h" |
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1670
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63 #include "toplev.h" |
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605
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64 #include "pager.h" |
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1352
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65 #include "parse.h" |
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66 #include "symtab.h" |
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67 #include "sysdep.h" |
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1742
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68 #include "pt-const.h" |
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69 #include "oct-obj.h" |
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70 #include "pt-exp.h" |
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2181
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71 #include "pt-fcn.h" |
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1742
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72 #include "pt-fvc.h" |
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2181
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73 #include "pt-mat.h" |
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74 #include "pt-plot.h" |
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75 #include "pr-output.h" |
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2076
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76 #include "syscalls.h" |
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2205
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77 #include "toplev.h" |
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1352
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78 #include "unwind-prot.h" |
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1
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79 #include "utils.h" |
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1352
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80 #include "variables.h" |
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81 #include "version.h" |
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529
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82 |
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2205
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83 // Echo commands as they are executed? |
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84 // |
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85 // 1 ==> echo commands read from script files |
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86 // 2 ==> echo commands from functions |
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87 // 4 ==> echo commands read from command line |
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88 // |
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89 // more than one state can be active at once. |
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90 int Vecho_executing_commands; |
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91 |
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92 // Where history is saved. |
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93 static string Vhistory_file; |
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94 |
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95 // The number of lines to keep in the history file. |
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96 static int Vhistory_size; |
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97 |
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98 // Should Octave always check to see if function files have changed |
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99 // since they were last compiled? |
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100 static bool Vignore_function_time_stamp; |
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101 |
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102 // TRUE if we are saving history. |
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103 static int Vsaving_history; |
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104 |
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1
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105 // Symbol table for symbols at the top level. |
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581
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106 symbol_table *top_level_sym_tab = 0; |
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1
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107 |
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108 // Symbol table for the current scope. |
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581
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109 symbol_table *curr_sym_tab = 0; |
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110 |
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111 // Symbol table for global symbols. |
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581
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112 symbol_table *global_sym_tab = 0; |
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1
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113 |
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2390
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114 octave_variable_reference::octave_variable_reference (tree_indirect_ref *i) |
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115 : id (0), indir (i) |
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116 { |
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117 if (indir->is_identifier_only ()) |
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118 { |
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119 id = indir->ident (); |
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120 indir = 0; |
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121 } |
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122 } |
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123 |
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124 void |
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125 octave_variable_reference::assign (const octave_value& rhs) |
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126 { |
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127 if (id) |
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128 id->assign (rhs); |
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129 else if (indir) |
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130 { |
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131 octave_value& ult = indir->reference (); |
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132 ult = rhs; |
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133 } |
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134 else |
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135 panic_impossible (); |
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136 } |
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137 |
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138 void |
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139 octave_variable_reference::assign (const octave_value_list& idx, |
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140 const octave_value& rhs) |
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141 { |
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142 if (id) |
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143 id->assign (idx, rhs); |
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144 else if (indir) |
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145 { |
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146 octave_value& ult = indir->reference (); |
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147 ult.assign (idx, rhs); |
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148 } |
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149 else |
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150 panic_impossible (); |
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151 } |
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152 |
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153 octave_value |
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154 octave_variable_reference::value (void) |
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155 { |
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156 octave_value retval; |
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157 |
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158 if (id) |
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159 retval = id->value (); |
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160 else if (indir) |
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161 retval = indir->value (); |
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162 else |
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163 panic_impossible (); |
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164 |
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165 return retval; |
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166 } |
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167 |
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593
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168 // Initialization. |
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169 |
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170 // Create the initial symbol tables and set the current scope at the |
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171 // top level. |
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172 |
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195
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173 void |
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174 initialize_symbol_tables (void) |
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175 { |
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581
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176 if (! global_sym_tab) |
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177 global_sym_tab = new symbol_table (); |
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195
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178 |
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581
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179 if (! top_level_sym_tab) |
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180 top_level_sym_tab = new symbol_table (); |
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195
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181 |
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182 curr_sym_tab = top_level_sym_tab; |
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183 } |
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184 |
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593
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185 // Attributes of variables and functions. |
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186 |
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187 // Is this variable a builtin? |
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188 |
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1827
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189 bool |
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1755
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190 is_builtin_variable (const string& name) |
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593
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191 { |
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192 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
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193 return (sr && sr->is_builtin_variable ()); |
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194 } |
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195 |
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196 // Is this a text-style function? |
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197 |
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1827
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198 bool |
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1755
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199 is_text_function_name (const string& s) |
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593
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200 { |
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201 symbol_record *sr = global_sym_tab->lookup (s); |
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202 return (sr && sr->is_text_function ()); |
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203 } |
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204 |
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2294
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205 // Is this a mapper function? |
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206 |
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207 bool |
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208 is_builtin_function_name (const string& s) |
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209 { |
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210 symbol_record *sr = global_sym_tab->lookup (s); |
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211 return (sr && sr->is_builtin_function ()); |
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212 } |
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213 |
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214 // Is this a mapper function? |
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215 |
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216 bool |
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217 is_mapper_function_name (const string& s) |
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218 { |
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219 symbol_record *sr = global_sym_tab->lookup (s); |
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220 return (sr && sr->is_mapper_function ()); |
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221 } |
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222 |
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593
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223 // Is this function globally in this scope? |
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224 |
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1827
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225 bool |
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1755
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226 is_globally_visible (const string& name) |
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593
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227 { |
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228 symbol_record *sr = curr_sym_tab->lookup (name, 0, 0); |
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229 return (sr && sr->is_linked_to_global ()); |
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230 } |
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231 |
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2086
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232 // Is this octave_value a valid function? |
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593
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233 |
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234 tree_fvc * |
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2086
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235 is_valid_function (const octave_value& arg, const string& warn_for, int warn) |
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593
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236 { |
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237 tree_fvc *ans = 0; |
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238 |
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1755
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239 string fcn_name; |
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1728
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240 |
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1517
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241 if (arg.is_string ()) |
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242 fcn_name = arg.string_value (); |
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1517
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243 |
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1755
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244 if (fcn_name.empty () || error_state) |
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593
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245 { |
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246 if (warn) |
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1755
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247 error ("%s: expecting function name as argument", |
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248 warn_for.c_str ()); |
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593
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249 return ans; |
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250 } |
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251 |
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252 symbol_record *sr = 0; |
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1755
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253 |
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254 if (! fcn_name.empty ()) |
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593
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255 sr = lookup_by_name (fcn_name); |
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256 |
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257 if (sr) |
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258 ans = sr->def (); |
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259 |
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260 if (! sr || ! ans || ! sr->is_function ()) |
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261 { |
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262 if (warn) |
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263 error ("%s: the symbol `%s' is not valid as a function", |
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1755
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264 warn_for.c_str (), fcn_name.c_str ()); |
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593
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265 ans = 0; |
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266 } |
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267 |
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268 return ans; |
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269 } |
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270 |
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1957
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271 DEFUN (is_global, args, , |
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593
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272 "is_global (X): return 1 if the string X names a global variable\n\ |
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273 otherwise, return 0.") |
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274 { |
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2086
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275 octave_value_list retval = 0.0; |
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593
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276 |
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712
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277 int nargin = args.length (); |
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278 |
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279 if (nargin != 1) |
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593
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280 { |
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281 print_usage ("is_global"); |
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282 return retval; |
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283 } |
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284 |
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1755
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285 string name = args(0).string_value (); |
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593
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286 |
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636
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287 if (error_state) |
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288 { |
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289 error ("is_global: expecting string argument"); |
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290 return retval; |
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291 } |
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292 |
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593
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293 symbol_record *sr = curr_sym_tab->lookup (name, 0, 0); |
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294 |
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295 retval = (double) (sr && sr->is_linked_to_global ()); |
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296 |
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297 return retval; |
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298 } |
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299 |
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1957
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300 DEFUN (exist, args, , |
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593
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301 "exist (NAME): check if variable or file exists\n\ |
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302 \n\ |
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1564
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303 returns:\n\ |
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304 \n\ |
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305 0 : NAME is undefined\n\ |
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306 1 : NAME is a variable\n\ |
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307 2 : NAME is a function\n\ |
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308 3 : NAME is a .oct file in the current LOADPATH\n\ |
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309 5 : NAME is a built-in function") |
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593
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310 { |
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2086
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311 octave_value_list retval; |
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593
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312 |
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712
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313 int nargin = args.length (); |
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314 |
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315 if (nargin != 1) |
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593
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316 { |
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317 print_usage ("exist"); |
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318 return retval; |
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319 } |
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320 |
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1755
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321 string name = args(0).string_value (); |
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593
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322 |
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636
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323 if (error_state) |
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324 { |
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325 error ("exist: expecting string argument"); |
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326 return retval; |
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327 } |
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328 |
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1755
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329 string struct_elts; |
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330 |
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331 size_t pos = name.find ('.'); |
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332 |
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333 if (pos != NPOS) |
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1277
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334 { |
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1755
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335 struct_elts = name.substr (pos+1); |
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336 name = name.substr (0, pos); |
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1277
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337 } |
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338 |
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593
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339 symbol_record *sr = curr_sym_tab->lookup (name, 0, 0); |
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340 if (! sr) |
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341 sr = global_sym_tab->lookup (name, 0, 0); |
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342 |
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343 retval = 0.0; |
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344 |
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345 if (sr && sr->is_variable () && sr->is_defined ()) |
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1277
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346 { |
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2390
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347 if (struct_elts.empty () || sr->is_map_element (struct_elts)) |
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348 retval = 1.0; |
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1277
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349 } |
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1421
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350 else if (sr && sr->is_builtin_function ()) |
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351 { |
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352 retval = 5.0; |
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353 } |
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354 else if (sr && sr->is_user_function ()) |
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355 { |
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356 retval = 2.0; |
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357 } |
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593
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358 else |
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359 { |
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1755
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360 string path = fcn_file_in_path (name); |
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361 |
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362 if (path.length () > 0) |
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593
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363 { |
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364 retval = 2.0; |
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365 } |
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366 else |
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367 { |
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1421
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368 path = oct_file_in_path (name); |
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1755
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369 |
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370 if (path.length () > 0) |
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1421
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371 { |
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372 retval = 3.0; |
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373 } |
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374 else |
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375 { |
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1766
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376 file_stat fs (name); |
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377 |
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378 if (fs && fs.is_reg ()) |
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1421
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379 retval = 2.0; |
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380 } |
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593
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381 } |
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382 } |
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383 |
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384 return retval; |
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385 } |
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386 |
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581
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387 // Is there a corresponding function file that is newer than the |
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388 // symbol definition? |
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389 |
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593
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390 static int |
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1
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391 symbol_out_of_date (symbol_record *sr) |
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392 { |
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2205
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393 if (Vignore_function_time_stamp == 2) |
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195
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394 return 0; |
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395 |
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529
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396 if (sr) |
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1
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397 { |
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490
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398 tree_fvc *ans = sr->def (); |
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529
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399 if (ans) |
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1
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400 { |
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1755
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401 string ff = ans->fcn_file_name (); |
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2205
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402 if (! ff.empty () |
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403 && ! (Vignore_function_time_stamp |
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404 && ans->is_system_fcn_file ())) |
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1
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405 { |
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406 time_t tp = ans->time_parsed (); |
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1755
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407 |
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408 string fname = fcn_file_in_path (ff); |
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409 |
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195
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410 int status = is_newer (fname, tp); |
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1755
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411 |
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195
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412 if (status > 0) |
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413 return 1; |
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1
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414 } |
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415 } |
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416 } |
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195
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417 return 0; |
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1
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418 } |
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419 |
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991
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420 static int |
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1755
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421 looks_like_octave_copyright (const string& s) |
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991
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422 { |
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1755
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423 string t = s.substr (0, 15); |
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424 |
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425 if (t == " Copyright (C) ") |
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991
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426 { |
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1755
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427 size_t pos = s.find ('\n'); |
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428 |
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429 if (pos != NPOS) |
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991
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430 { |
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1755
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431 pos = s.find ('\n', pos + 1); |
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432 |
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433 if (pos != NPOS) |
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991
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434 { |
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1755
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435 pos++; |
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436 |
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437 t = s.substr (pos, 29); |
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438 |
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439 if (t == " This file is part of Octave." |
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1983
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440 || t == " This program is free softwar") |
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991
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441 return 1; |
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442 } |
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443 } |
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444 } |
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445 return 0; |
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446 } |
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447 |
|
1419
|
448 // Eat whitespace and comments from FFILE, returning the text of the |
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449 // comments read if it doesn't look like a copyright notice. If |
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450 // IN_PARTS, consider each block of comments separately; otherwise, |
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451 // grab them all at once. |
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1418
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452 |
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2300
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453 // XXX FIXME XXX -- grab_help_text() in lex.l duplicates some of this |
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454 // code! |
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455 |
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1755
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456 static string |
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1419
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457 gobble_leading_white_space (FILE *ffile, int in_parts) |
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581
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458 { |
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1755
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459 string help_txt; |
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991
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460 |
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2300
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461 bool first_comments_seen = false; |
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462 bool begin_comment = false; |
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463 bool have_help_text = false; |
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464 bool in_comment = false; |
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581
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465 int c; |
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1755
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466 |
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581
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467 while ((c = getc (ffile)) != EOF) |
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468 { |
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984
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469 current_input_column++; |
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1755
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470 |
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2300
|
471 if (begin_comment) |
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472 { |
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473 if (c == '%' || c == '#') |
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474 continue; |
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475 else |
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476 begin_comment = false; |
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477 } |
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478 |
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581
|
479 if (in_comment) |
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480 { |
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991
|
481 if (! have_help_text) |
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482 { |
|
2300
|
483 first_comments_seen = true; |
|
1755
|
484 help_txt += (char) c; |
|
991
|
485 } |
|
|
486 |
|
581
|
487 if (c == '\n') |
|
984
|
488 { |
|
|
489 input_line_number++; |
|
|
490 current_input_column = 0; |
|
2300
|
491 in_comment = false; |
|
1755
|
492 |
|
1419
|
493 if (in_parts) |
|
1418
|
494 { |
|
1419
|
495 if ((c = getc (ffile)) != EOF) |
|
|
496 { |
|
|
497 current_input_column--; |
|
|
498 ungetc (c, ffile); |
|
|
499 if (c == '\n') |
|
|
500 break; |
|
|
501 } |
|
|
502 else |
|
1418
|
503 break; |
|
|
504 } |
|
984
|
505 } |
|
581
|
506 } |
|
|
507 else |
|
|
508 { |
|
984
|
509 switch (c) |
|
581
|
510 { |
|
984
|
511 case ' ': |
|
|
512 case '\t': |
|
991
|
513 if (first_comments_seen) |
|
2300
|
514 have_help_text = true; |
|
984
|
515 break; |
|
|
516 |
|
|
517 case '\n': |
|
993
|
518 if (first_comments_seen) |
|
2300
|
519 have_help_text = true; |
|
984
|
520 input_line_number++; |
|
|
521 current_input_column = 0; |
|
|
522 continue; |
|
|
523 |
|
|
524 case '%': |
|
|
525 case '#': |
|
2300
|
526 begin_comment = true; |
|
|
527 in_comment = true; |
|
984
|
528 break; |
|
|
529 |
|
|
530 default: |
|
|
531 current_input_column--; |
|
581
|
532 ungetc (c, ffile); |
|
991
|
533 goto done; |
|
581
|
534 } |
|
|
535 } |
|
|
536 } |
|
991
|
537 |
|
|
538 done: |
|
|
539 |
|
1755
|
540 if (! help_txt.empty ()) |
|
991
|
541 { |
|
1419
|
542 if (looks_like_octave_copyright (help_txt)) |
|
1755
|
543 help_txt.resize (0); |
|
1419
|
544 |
|
1755
|
545 if (in_parts && help_txt.empty ()) |
|
1419
|
546 help_txt = gobble_leading_white_space (ffile, in_parts); |
|
1418
|
547 } |
|
|
548 |
|
991
|
549 return help_txt; |
|
581
|
550 } |
|
|
551 |
|
|
552 static int |
|
|
553 is_function_file (FILE *ffile) |
|
|
554 { |
|
|
555 int status = 0; |
|
|
556 |
|
|
557 long pos = ftell (ffile); |
|
|
558 |
|
|
559 char buf [10]; |
|
|
560 fgets (buf, 10, ffile); |
|
|
561 int len = strlen (buf); |
|
|
562 if (len > 8 && strncmp (buf, "function", 8) == 0 |
|
|
563 && ! (isalnum (buf[8]) || buf[8] == '_')) |
|
|
564 status = 1; |
|
|
565 |
|
|
566 fseek (ffile, pos, SEEK_SET); |
|
|
567 |
|
|
568 return status; |
|
|
569 } |
|
|
570 |
|
1907
|
571 static void |
|
|
572 restore_command_history (void *) |
|
|
573 { |
|
2205
|
574 octave_command_history.ignore_entries (! Vsaving_history); |
|
1907
|
575 } |
|
|
576 |
|
581
|
577 static int |
|
1755
|
578 parse_fcn_file (int exec_script, const string& ff) |
|
581
|
579 { |
|
|
580 begin_unwind_frame ("parse_fcn_file"); |
|
|
581 |
|
|
582 int script_file_executed = 0; |
|
|
583 |
|
1358
|
584 // Open function file and parse. |
|
581
|
585 |
|
|
586 int old_reading_fcn_file_state = reading_fcn_file; |
|
|
587 |
|
|
588 unwind_protect_ptr (rl_instream); |
|
|
589 unwind_protect_ptr (ff_instream); |
|
|
590 |
|
|
591 unwind_protect_int (using_readline); |
|
|
592 unwind_protect_int (input_line_number); |
|
|
593 unwind_protect_int (current_input_column); |
|
|
594 unwind_protect_int (reading_fcn_file); |
|
|
595 |
|
|
596 using_readline = 0; |
|
|
597 reading_fcn_file = 1; |
|
|
598 input_line_number = 0; |
|
|
599 current_input_column = 1; |
|
|
600 |
|
|
601 FILE *ffile = get_input_from_file (ff, 0); |
|
|
602 |
|
|
603 if (ffile) |
|
|
604 { |
|
1271
|
605 // Check to see if this file defines a function or is just a |
|
|
606 // list of commands. |
|
581
|
607 |
|
1755
|
608 string tmp_help_txt = gobble_leading_white_space (ffile, 0); |
|
991
|
609 |
|
581
|
610 if (is_function_file (ffile)) |
|
|
611 { |
|
1907
|
612 // XXX FIXME XXX -- we shouldn't need both the |
|
|
613 // octave_command_history object and the |
|
2205
|
614 // Vsaving_history variable... |
|
1907
|
615 octave_command_history.ignore_entries (); |
|
|
616 |
|
|
617 add_unwind_protect (restore_command_history, 0); |
|
|
618 |
|
2205
|
619 unwind_protect_int (Vecho_executing_commands); |
|
|
620 unwind_protect_int (Vsaving_history); |
|
581
|
621 unwind_protect_int (reading_fcn_file); |
|
1516
|
622 unwind_protect_int (input_from_command_line_file); |
|
581
|
623 |
|
2205
|
624 Vecho_executing_commands = ECHO_OFF; |
|
|
625 Vsaving_history = 0; |
|
581
|
626 reading_fcn_file = 1; |
|
1516
|
627 input_from_command_line_file = 0; |
|
581
|
628 |
|
|
629 YY_BUFFER_STATE old_buf = current_buffer (); |
|
|
630 YY_BUFFER_STATE new_buf = create_buffer (ffile); |
|
|
631 |
|
|
632 add_unwind_protect (restore_input_buffer, (void *) old_buf); |
|
|
633 add_unwind_protect (delete_input_buffer, (void *) new_buf); |
|
|
634 |
|
|
635 switch_to_buffer (new_buf); |
|
|
636 |
|
|
637 unwind_protect_ptr (curr_sym_tab); |
|
|
638 |
|
|
639 reset_parser (); |
|
|
640 |
|
991
|
641 help_buf = tmp_help_txt; |
|
|
642 |
|
581
|
643 int status = yyparse (); |
|
|
644 |
|
|
645 if (status != 0) |
|
|
646 { |
|
1755
|
647 error ("parse error while reading function file %s", |
|
|
648 ff.c_str ()); |
|
581
|
649 global_sym_tab->clear (curr_fcn_file_name); |
|
|
650 } |
|
|
651 } |
|
|
652 else if (exec_script) |
|
|
653 { |
|
1271
|
654 // The value of `reading_fcn_file' will be restored to the |
|
|
655 // proper value when we unwind from this frame. |
|
581
|
656 reading_fcn_file = old_reading_fcn_file_state; |
|
|
657 |
|
1952
|
658 // XXX FIXME XXX -- we shouldn't need both the |
|
|
659 // octave_command_history object and the |
|
2205
|
660 // Vsaving_history variable... |
|
1952
|
661 octave_command_history.ignore_entries (); |
|
|
662 |
|
|
663 add_unwind_protect (restore_command_history, 0); |
|
|
664 |
|
2205
|
665 unwind_protect_int (Vsaving_history); |
|
581
|
666 unwind_protect_int (reading_script_file); |
|
1952
|
667 |
|
2205
|
668 Vsaving_history = 0; |
|
581
|
669 reading_script_file = 1; |
|
|
670 |
|
|
671 parse_and_execute (ffile, 1); |
|
|
672 |
|
|
673 script_file_executed = 1; |
|
|
674 } |
|
|
675 fclose (ffile); |
|
|
676 } |
|
|
677 |
|
|
678 run_unwind_frame ("parse_fcn_file"); |
|
|
679 |
|
|
680 return script_file_executed; |
|
|
681 } |
|
|
682 |
|
1827
|
683 static bool |
|
581
|
684 load_fcn_from_file (symbol_record *sym_rec, int exec_script) |
|
|
685 { |
|
1827
|
686 bool script_file_executed = false; |
|
581
|
687 |
|
1755
|
688 string nm = sym_rec->name (); |
|
581
|
689 |
|
704
|
690 if (load_octave_oct_file (nm)) |
|
|
691 { |
|
|
692 force_link_to_function (nm); |
|
|
693 } |
|
|
694 else |
|
581
|
695 { |
|
1755
|
696 string ff = fcn_file_in_path (nm); |
|
581
|
697 |
|
1606
|
698 // These are needed by yyparse. |
|
|
699 |
|
1755
|
700 begin_unwind_frame ("load_fcn_from_file"); |
|
|
701 |
|
|
702 unwind_protect_str (curr_fcn_file_name); |
|
|
703 unwind_protect_str (curr_fcn_file_full_name); |
|
|
704 |
|
1606
|
705 curr_fcn_file_name = nm; |
|
|
706 curr_fcn_file_full_name = ff; |
|
|
707 |
|
1755
|
708 if (ff.length () > 0) |
|
|
709 script_file_executed = parse_fcn_file (exec_script, ff); |
|
581
|
710 |
|
|
711 if (! (error_state || script_file_executed)) |
|
|
712 force_link_to_function (nm); |
|
1755
|
713 |
|
|
714 run_unwind_frame ("load_fcn_from_file"); |
|
581
|
715 } |
|
|
716 |
|
|
717 return script_file_executed; |
|
|
718 } |
|
|
719 |
|
1827
|
720 bool |
|
581
|
721 lookup (symbol_record *sym_rec, int exec_script) |
|
|
722 { |
|
1827
|
723 bool script_executed = false; |
|
581
|
724 |
|
|
725 if (! sym_rec->is_linked_to_global ()) |
|
|
726 { |
|
|
727 if (sym_rec->is_defined ()) |
|
|
728 { |
|
|
729 if (sym_rec->is_function () && symbol_out_of_date (sym_rec)) |
|
1271
|
730 script_executed = load_fcn_from_file (sym_rec, exec_script); |
|
581
|
731 } |
|
|
732 else if (! sym_rec->is_formal_parameter ()) |
|
|
733 { |
|
|
734 link_to_builtin_or_function (sym_rec); |
|
1271
|
735 |
|
581
|
736 if (! sym_rec->is_defined ()) |
|
1271
|
737 script_executed = load_fcn_from_file (sym_rec, exec_script); |
|
581
|
738 else if (sym_rec->is_function () && symbol_out_of_date (sym_rec)) |
|
1271
|
739 script_executed = load_fcn_from_file (sym_rec, exec_script); |
|
581
|
740 } |
|
|
741 } |
|
|
742 |
|
1271
|
743 return script_executed; |
|
581
|
744 } |
|
|
745 |
|
|
746 // Get the symbol record for the given name that is visible in the |
|
|
747 // current scope. Reread any function definitions that appear to be |
|
|
748 // out of date. If a function is available in a file but is not |
|
|
749 // currently loaded, this will load it and insert the name in the |
|
|
750 // current symbol table. |
|
|
751 |
|
|
752 symbol_record * |
|
1755
|
753 lookup_by_name (const string& nm, int exec_script) |
|
581
|
754 { |
|
|
755 symbol_record *sym_rec = curr_sym_tab->lookup (nm, 1, 0); |
|
|
756 |
|
|
757 lookup (sym_rec, exec_script); |
|
|
758 |
|
|
759 return sym_rec; |
|
|
760 } |
|
|
761 |
|
1755
|
762 string |
|
|
763 get_help_from_file (const string& path) |
|
991
|
764 { |
|
1755
|
765 string retval; |
|
|
766 |
|
|
767 if (! path.empty ()) |
|
991
|
768 { |
|
1755
|
769 FILE *fptr = fopen (path.c_str (), "r"); |
|
|
770 |
|
991
|
771 if (fptr) |
|
|
772 { |
|
1755
|
773 retval = gobble_leading_white_space (fptr, 1); |
|
991
|
774 fclose (fptr); |
|
|
775 } |
|
|
776 } |
|
1755
|
777 |
|
|
778 return retval; |
|
991
|
779 } |
|
|
780 |
|
593
|
781 // Variable values. |
|
195
|
782 |
|
581
|
783 // Look for the given name in the global symbol table. If it refers |
|
|
784 // to a string, return a new copy. If not, return 0; |
|
|
785 |
|
1755
|
786 string |
|
|
787 builtin_string_variable (const string& name) |
|
1
|
788 { |
|
195
|
789 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
|
|
790 |
|
1271
|
791 // It is a prorgramming error to look for builtins that aren't. |
|
195
|
792 |
|
529
|
793 assert (sr); |
|
195
|
794 |
|
1755
|
795 string retval; |
|
1
|
796 |
|
490
|
797 tree_fvc *defn = sr->def (); |
|
195
|
798 |
|
529
|
799 if (defn) |
|
1
|
800 { |
|
2086
|
801 octave_value val = defn->eval (0); |
|
195
|
802 |
|
610
|
803 if (! error_state && val.is_string ()) |
|
1755
|
804 retval = val.string_value (); |
|
1
|
805 } |
|
|
806 |
|
|
807 return retval; |
|
|
808 } |
|
|
809 |
|
581
|
810 // Look for the given name in the global symbol table. If it refers |
|
1504
|
811 // to a real scalar, place the value in d and return 1. Otherwise, |
|
|
812 // return 0. |
|
581
|
813 |
|
1
|
814 int |
|
1755
|
815 builtin_real_scalar_variable (const string& name, double& d) |
|
1
|
816 { |
|
1504
|
817 int status = 0; |
|
195
|
818 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
|
|
819 |
|
1271
|
820 // It is a prorgramming error to look for builtins that aren't. |
|
195
|
821 |
|
529
|
822 assert (sr); |
|
1
|
823 |
|
490
|
824 tree_fvc *defn = sr->def (); |
|
195
|
825 |
|
529
|
826 if (defn) |
|
1
|
827 { |
|
2086
|
828 octave_value val = defn->eval (0); |
|
195
|
829 |
|
598
|
830 if (! error_state && val.is_scalar_type ()) |
|
1
|
831 { |
|
|
832 d = val.double_value (); |
|
1504
|
833 status = 1; |
|
1
|
834 } |
|
|
835 } |
|
|
836 |
|
|
837 return status; |
|
|
838 } |
|
|
839 |
|
1093
|
840 // Look for the given name in the global symbol table. |
|
|
841 |
|
2086
|
842 octave_value |
|
1755
|
843 builtin_any_variable (const string& name) |
|
1093
|
844 { |
|
2086
|
845 octave_value retval; |
|
1093
|
846 |
|
|
847 symbol_record *sr = global_sym_tab->lookup (name, 0, 0); |
|
|
848 |
|
1271
|
849 // It is a prorgramming error to look for builtins that aren't. |
|
1093
|
850 |
|
|
851 assert (sr); |
|
|
852 |
|
|
853 tree_fvc *defn = sr->def (); |
|
|
854 |
|
|
855 if (defn) |
|
|
856 retval = defn->eval (0); |
|
|
857 |
|
|
858 return retval; |
|
|
859 } |
|
|
860 |
|
593
|
861 // Global stuff and links to builtin variables and functions. |
|
|
862 |
|
581
|
863 // Make the definition of the symbol record sr be the same as the |
|
|
864 // definition of the global variable of the same name, creating it if |
|
1418
|
865 // it doesn't already exist. |
|
581
|
866 |
|
195
|
867 void |
|
|
868 link_to_global_variable (symbol_record *sr) |
|
|
869 { |
|
|
870 if (sr->is_linked_to_global ()) |
|
|
871 return; |
|
|
872 |
|
1755
|
873 string nm = sr->name (); |
|
|
874 |
|
|
875 symbol_record *gsr = global_sym_tab->lookup (nm, 1, 0); |
|
195
|
876 |
|
|
877 if (sr->is_formal_parameter ()) |
|
|
878 { |
|
1755
|
879 error ("can't make function parameter `%s' global", nm.c_str ()); |
|
195
|
880 return; |
|
|
881 } |
|
|
882 |
|
1271
|
883 // There must be a better way to do this. XXX FIXME XXX |
|
195
|
884 |
|
|
885 if (sr->is_variable ()) |
|
|
886 { |
|
1271
|
887 // Would be nice not to have this cast. XXX FIXME XXX |
|
|
888 |
|
2390
|
889 tree_constant *tmp = (tree_constant *) sr->def (); |
|
529
|
890 if (tmp) |
|
2390
|
891 tmp = new tree_constant (*tmp); |
|
529
|
892 else |
|
2390
|
893 tmp = new tree_constant (); |
|
195
|
894 gsr->define (tmp); |
|
|
895 } |
|
|
896 else |
|
529
|
897 sr->clear (); |
|
195
|
898 |
|
1271
|
899 // If the global symbol is currently defined as a function, we need |
|
|
900 // to hide it with a variable. |
|
195
|
901 |
|
|
902 if (gsr->is_function ()) |
|
2390
|
903 gsr->define ((tree_constant *) 0); |
|
195
|
904 |
|
|
905 sr->alias (gsr, 1); |
|
|
906 sr->mark_as_linked_to_global (); |
|
|
907 } |
|
|
908 |
|
581
|
909 // Make the definition of the symbol record sr be the same as the |
|
|
910 // definition of the builtin variable of the same name. |
|
|
911 |
|
195
|
912 void |
|
|
913 link_to_builtin_variable (symbol_record *sr) |
|
|
914 { |
|
|
915 symbol_record *tmp_sym = global_sym_tab->lookup (sr->name (), 0, 0); |
|
|
916 |
|
529
|
917 if (tmp_sym && tmp_sym->is_builtin_variable ()) |
|
|
918 sr->alias (tmp_sym); |
|
195
|
919 } |
|
|
920 |
|
581
|
921 // Make the definition of the symbol record sr be the same as the |
|
|
922 // definition of the builtin variable or function, or user function of |
|
|
923 // the same name, provided that the name has not been used as a formal |
|
|
924 // parameter. |
|
|
925 |
|
195
|
926 void |
|
|
927 link_to_builtin_or_function (symbol_record *sr) |
|
|
928 { |
|
|
929 symbol_record *tmp_sym = global_sym_tab->lookup (sr->name (), 0, 0); |
|
|
930 |
|
529
|
931 if (tmp_sym |
|
|
932 && (tmp_sym->is_builtin_variable () || tmp_sym->is_function ()) |
|
|
933 && ! tmp_sym->is_formal_parameter ()) |
|
|
934 sr->alias (tmp_sym); |
|
195
|
935 } |
|
|
936 |
|
581
|
937 // Force a link to a function in the current symbol table. This is |
|
|
938 // used just after defining a function to avoid different behavior |
|
|
939 // depending on whether or not the function has been evaluated after |
|
|
940 // being defined. |
|
|
941 // |
|
|
942 // Return without doing anything if there isn't a function with the |
|
|
943 // given name defined in the global symbol table. |
|
|
944 |
|
195
|
945 void |
|
1755
|
946 force_link_to_function (const string& id_name) |
|
195
|
947 { |
|
|
948 symbol_record *gsr = global_sym_tab->lookup (id_name, 1, 0); |
|
|
949 if (gsr->is_function ()) |
|
|
950 { |
|
|
951 curr_sym_tab->clear (id_name); |
|
|
952 symbol_record *csr = curr_sym_tab->lookup (id_name, 1, 0); |
|
|
953 csr->alias (gsr); |
|
|
954 } |
|
|
955 } |
|
|
956 |
|
605
|
957 // Help stuff. Shouldn't this go in help.cc? |
|
593
|
958 |
|
|
959 // It's not likely that this does the right thing now. XXX FIXME XXX |
|
|
960 |
|
1755
|
961 string_vector |
|
593
|
962 make_name_list (void) |
|
|
963 { |
|
|
964 int key_len = 0; |
|
|
965 int glb_len = 0; |
|
|
966 int top_len = 0; |
|
|
967 int lcl_len = 0; |
|
|
968 |
|
1755
|
969 string_vector key; |
|
|
970 string_vector glb; |
|
|
971 string_vector top; |
|
|
972 string_vector lcl; |
|
|
973 string_vector ffl; |
|
593
|
974 |
|
1271
|
975 // Each of these functions returns a new vector of pointers to new |
|
|
976 // strings. |
|
593
|
977 |
|
|
978 key = names (keyword_help (), key_len); |
|
1795
|
979 |
|
593
|
980 glb = global_sym_tab->list (glb_len); |
|
1795
|
981 |
|
593
|
982 top = top_level_sym_tab->list (top_len); |
|
1795
|
983 |
|
593
|
984 if (top_level_sym_tab != curr_sym_tab) |
|
|
985 lcl = curr_sym_tab->list (lcl_len); |
|
1795
|
986 |
|
2233
|
987 ffl = octave_fcn_file_name_cache::list_no_suffix (); |
|
1795
|
988 int ffl_len = ffl.length (); |
|
593
|
989 |
|
|
990 int total_len = key_len + glb_len + top_len + lcl_len + ffl_len; |
|
|
991 |
|
1755
|
992 string_vector list (total_len); |
|
1418
|
993 |
|
1271
|
994 // Put all the symbols in one big list. Only copy pointers, not the |
|
|
995 // strings they point to, then only delete the original array of |
|
|
996 // pointers, and not the strings they point to. |
|
593
|
997 |
|
|
998 int j = 0; |
|
|
999 int i = 0; |
|
|
1000 for (i = 0; i < key_len; i++) |
|
|
1001 list[j++] = key[i]; |
|
|
1002 |
|
|
1003 for (i = 0; i < glb_len; i++) |
|
|
1004 list[j++] = glb[i]; |
|
|
1005 |
|
|
1006 for (i = 0; i < top_len; i++) |
|
|
1007 list[j++] = top[i]; |
|
|
1008 |
|
|
1009 for (i = 0; i < lcl_len; i++) |
|
|
1010 list[j++] = lcl[i]; |
|
|
1011 |
|
|
1012 for (i = 0; i < ffl_len; i++) |
|
|
1013 list[j++] = ffl[i]; |
|
|
1014 |
|
|
1015 return list; |
|
|
1016 } |
|
|
1017 |
|
|
1018 // List variable names. |
|
|
1019 |
|
|
1020 static void |
|
2095
|
1021 print_symbol_info_line (ostream& os, const symbol_record_info& s) |
|
593
|
1022 { |
|
2095
|
1023 os << (s.is_read_only () ? " -" : " w"); |
|
|
1024 os << (s.is_eternal () ? "- " : "d "); |
|
593
|
1025 #if 0 |
|
2095
|
1026 os << (s.hides_fcn () ? "f" : (s.hides_builtin () ? "F" : "-")); |
|
593
|
1027 #endif |
|
2390
|
1028 os.form (" %-16s", s.type_name ().c_str ()); |
|
2404
|
1029 |
|
|
1030 int nr = s.rows (); |
|
|
1031 int nc = s.columns (); |
|
|
1032 |
|
|
1033 if (nr < 0) |
|
|
1034 os << " -"; |
|
593
|
1035 else |
|
2404
|
1036 os.form ("%7d", nr); |
|
|
1037 |
|
|
1038 if (nc < 0) |
|
|
1039 os << " -"; |
|
|
1040 else |
|
|
1041 os.form ("%7d", nc); |
|
|
1042 |
|
2095
|
1043 os << " " << s.name () << "\n"; |
|
593
|
1044 } |
|
|
1045 |
|
|
1046 static void |
|
2095
|
1047 print_long_listing (ostream& os, symbol_record_info *s) |
|
593
|
1048 { |
|
|
1049 if (! s) |
|
|
1050 return; |
|
|
1051 |
|
|
1052 symbol_record_info *ptr = s; |
|
|
1053 while (ptr->is_defined ()) |
|
|
1054 { |
|
2095
|
1055 print_symbol_info_line (os, *ptr); |
|
593
|
1056 ptr++; |
|
|
1057 } |
|
|
1058 } |
|
|
1059 |
|
|
1060 static int |
|
1755
|
1061 maybe_list (const char *header, const string_vector& argv, int argc, |
|
2095
|
1062 ostream& os, int show_verbose, symbol_table |
|
867
|
1063 *sym_tab, unsigned type, unsigned scope) |
|
593
|
1064 { |
|
|
1065 int count; |
|
|
1066 int status = 0; |
|
|
1067 if (show_verbose) |
|
|
1068 { |
|
|
1069 symbol_record_info *symbols; |
|
867
|
1070 symbols = sym_tab->long_list (count, argv, argc, 1, type, scope); |
|
593
|
1071 if (symbols && count > 0) |
|
|
1072 { |
|
2095
|
1073 os << "\n" << header << "\n\n" |
|
593
|
1074 << "prot type rows cols name\n" |
|
|
1075 << "==== ==== ==== ==== ====\n"; |
|
|
1076 |
|
2095
|
1077 print_long_listing (os, symbols); |
|
593
|
1078 status = 1; |
|
|
1079 } |
|
|
1080 delete [] symbols; |
|
|
1081 } |
|
|
1082 else |
|
|
1083 { |
|
1755
|
1084 string_vector symbols = sym_tab->list (count, argv, argc, 1, |
|
|
1085 type, scope); |
|
|
1086 if (symbols.length () > 0 && count > 0) |
|
593
|
1087 { |
|
2095
|
1088 os << "\n" << header << "\n\n"; |
|
|
1089 symbols.list_in_columns (os); |
|
593
|
1090 status = 1; |
|
|
1091 } |
|
|
1092 } |
|
|
1093 return status; |
|
|
1094 } |
|
|
1095 |
|
2294
|
1096 DEFUN (document, args, , |
|
|
1097 "document (NAME, STRING)\n\ |
|
593
|
1098 \n\ |
|
|
1099 Associate a cryptic message with a variable name.") |
|
|
1100 { |
|
2294
|
1101 octave_value retval; |
|
1755
|
1102 |
|
2294
|
1103 int nargin = args.length (); |
|
1755
|
1104 |
|
2294
|
1105 if (nargin == 2) |
|
593
|
1106 { |
|
2294
|
1107 string name = args(0).string_value (); |
|
593
|
1108 |
|
2294
|
1109 if (! error_state) |
|
593
|
1110 { |
|
2294
|
1111 string help = args(1).string_value (); |
|
593
|
1112 |
|
2294
|
1113 if (! error_state) |
|
|
1114 { |
|
|
1115 if (is_builtin_variable (name) |
|
|
1116 || is_text_function_name (name) |
|
|
1117 || is_mapper_function_name (name) |
|
|
1118 || is_builtin_function_name (name)) |
|
|
1119 error ("document: can't redefine help for built-in variables and functions"); |
|
|
1120 else |
|
|
1121 { |
|
|
1122 symbol_record *sym_rec = curr_sym_tab->lookup (name, 0); |
|
|
1123 |
|
|
1124 if (sym_rec) |
|
|
1125 sym_rec->document (help); |
|
|
1126 else |
|
|
1127 error ("document: no such symbol `%s'", name.c_str ()); |
|
|
1128 } |
|
|
1129 } |
|
593
|
1130 } |
|
|
1131 } |
|
|
1132 else |
|
|
1133 print_usage ("document"); |
|
|
1134 |
|
|
1135 return retval; |
|
|
1136 } |
|
|
1137 |
|
584
|
1138 // XXX FIXME XXX -- this should take a list of regular expressions |
|
|
1139 // naming the variables to look for. |
|
|
1140 |
|
2086
|
1141 static octave_value_list |
|
1755
|
1142 do_who (int argc, const string_vector& argv) |
|
529
|
1143 { |
|
2086
|
1144 octave_value_list retval; |
|
529
|
1145 |
|
|
1146 int show_builtins = 0; |
|
|
1147 int show_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
1148 int show_variables = 1; |
|
|
1149 int show_verbose = 0; |
|
|
1150 |
|
1755
|
1151 string my_name = argv[0]; |
|
584
|
1152 |
|
529
|
1153 if (argc > 1) |
|
|
1154 { |
|
|
1155 show_functions = 0; |
|
|
1156 show_variables = 0; |
|
|
1157 } |
|
|
1158 |
|
1857
|
1159 int i; |
|
|
1160 for (i = 1; i < argc; i++) |
|
529
|
1161 { |
|
1755
|
1162 if (argv[i] == "-all" || argv[i] == "-a") |
|
529
|
1163 { |
|
|
1164 show_builtins++; |
|
|
1165 show_functions++; |
|
1418
|
1166 show_variables++; |
|
529
|
1167 } |
|
1755
|
1168 else if (argv[i] == "-builtins" || argv[i] == "-b") |
|
529
|
1169 show_builtins++; |
|
1755
|
1170 else if (argv[i] == "-functions" || argv[i] == "-f") |
|
529
|
1171 show_functions++; |
|
1755
|
1172 else if (argv[i] == "-long" || argv[i] == "-l") |
|
605
|
1173 show_verbose++; |
|
1755
|
1174 else if (argv[i] == "-variables" || argv[i] == "-v") |
|
529
|
1175 show_variables++; |
|
1755
|
1176 else if (argv[i][0] == '-') |
|
|
1177 warning ("%s: unrecognized option `%s'", my_name.c_str (), |
|
|
1178 argv[i].c_str ()); |
|
529
|
1179 else |
|
867
|
1180 break; |
|
529
|
1181 } |
|
|
1182 |
|
1857
|
1183 int npats = argc - i; |
|
|
1184 string_vector pats (npats); |
|
|
1185 for (int j = 0; j < npats; j++) |
|
|
1186 pats[j] = argv[i+j]; |
|
|
1187 |
|
1271
|
1188 // If the user specified -l and nothing else, show variables. If |
|
|
1189 // evaluating this at the top level, also show functions. |
|
529
|
1190 |
|
|
1191 if (show_verbose && ! (show_builtins || show_functions || show_variables)) |
|
|
1192 { |
|
|
1193 show_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
1194 show_variables = 1; |
|
|
1195 } |
|
|
1196 |
|
|
1197 int pad_after = 0; |
|
|
1198 |
|
|
1199 if (show_builtins) |
|
|
1200 { |
|
1857
|
1201 pad_after += maybe_list ("*** built-in variables:", pats, npats, |
|
2095
|
1202 octave_stdout, show_verbose, global_sym_tab, |
|
529
|
1203 symbol_def::BUILTIN_VARIABLE, |
|
|
1204 SYMTAB_ALL_SCOPES); |
|
|
1205 |
|
1857
|
1206 pad_after += maybe_list ("*** built-in functions:", pats, npats, |
|
2095
|
1207 octave_stdout, show_verbose, global_sym_tab, |
|
529
|
1208 symbol_def::BUILTIN_FUNCTION, |
|
|
1209 SYMTAB_ALL_SCOPES); |
|
|
1210 } |
|
|
1211 |
|
|
1212 if (show_functions) |
|
|
1213 { |
|
|
1214 pad_after += maybe_list ("*** currently compiled functions:", |
|
2095
|
1215 pats, npats, octave_stdout, show_verbose, |
|
867
|
1216 global_sym_tab, symbol_def::USER_FUNCTION, |
|
529
|
1217 SYMTAB_ALL_SCOPES); |
|
|
1218 } |
|
|
1219 |
|
|
1220 if (show_variables) |
|
|
1221 { |
|
1857
|
1222 pad_after += maybe_list ("*** local user variables:", pats, npats, |
|
2095
|
1223 octave_stdout, show_verbose, curr_sym_tab, |
|
529
|
1224 symbol_def::USER_VARIABLE, |
|
1418
|
1225 SYMTAB_LOCAL_SCOPE); |
|
529
|
1226 |
|
|
1227 pad_after += maybe_list ("*** globally visible user variables:", |
|
2095
|
1228 pats, npats, octave_stdout, show_verbose, |
|
867
|
1229 curr_sym_tab, symbol_def::USER_VARIABLE, |
|
529
|
1230 SYMTAB_GLOBAL_SCOPE); |
|
|
1231 } |
|
|
1232 |
|
|
1233 if (pad_after) |
|
2095
|
1234 octave_stdout << "\n"; |
|
529
|
1235 |
|
581
|
1236 return retval; |
|
|
1237 } |
|
|
1238 |
|
1957
|
1239 DEFUN_TEXT (who, args, , |
|
581
|
1240 "who [-all] [-builtins] [-functions] [-long] [-variables]\n\ |
|
|
1241 \n\ |
|
|
1242 List currently defined symbol(s). Options may be shortened to one\n\ |
|
|
1243 character, but may not be combined.") |
|
|
1244 { |
|
2086
|
1245 octave_value_list retval; |
|
581
|
1246 |
|
1755
|
1247 int argc = args.length () + 1; |
|
|
1248 |
|
1968
|
1249 string_vector argv = args.make_argv ("who"); |
|
1755
|
1250 |
|
|
1251 if (error_state) |
|
|
1252 return retval; |
|
581
|
1253 |
|
1488
|
1254 retval = do_who (argc, argv); |
|
581
|
1255 |
|
529
|
1256 return retval; |
|
|
1257 } |
|
|
1258 |
|
1957
|
1259 DEFUN_TEXT (whos, args, , |
|
581
|
1260 "whos [-all] [-builtins] [-functions] [-long] [-variables]\n\ |
|
|
1261 \n\ |
|
|
1262 List currently defined symbol(s). Options may be shortened to one\n\ |
|
|
1263 character, but may not be combined.") |
|
|
1264 { |
|
2086
|
1265 octave_value_list retval; |
|
581
|
1266 |
|
712
|
1267 int nargin = args.length (); |
|
|
1268 |
|
2086
|
1269 octave_value_list tmp_args; |
|
742
|
1270 for (int i = nargin; i > 0; i--) |
|
|
1271 tmp_args(i) = args(i-1); |
|
|
1272 tmp_args(0) = "-long"; |
|
581
|
1273 |
|
742
|
1274 int argc = tmp_args.length () + 1; |
|
1755
|
1275 |
|
1980
|
1276 string_vector argv = tmp_args.make_argv ("whos"); |
|
581
|
1277 |
|
|
1278 if (error_state) |
|
|
1279 return retval; |
|
|
1280 |
|
1488
|
1281 retval = do_who (argc, argv); |
|
581
|
1282 |
|
|
1283 return retval; |
|
|
1284 } |
|
|
1285 |
|
593
|
1286 // Install variables and functions in the symbol tables. |
|
529
|
1287 |
|
593
|
1288 void |
|
1755
|
1289 install_builtin_mapper (const builtin_mapper_function& mf) |
|
529
|
1290 { |
|
1755
|
1291 symbol_record *sym_rec = global_sym_tab->lookup (mf.name, 1); |
|
593
|
1292 sym_rec->unprotect (); |
|
|
1293 |
|
2089
|
1294 tree_builtin *def = new tree_builtin (mf, mf.name); |
|
593
|
1295 |
|
|
1296 sym_rec->define (def); |
|
|
1297 |
|
1755
|
1298 sym_rec->document (mf.help_string); |
|
593
|
1299 sym_rec->make_eternal (); |
|
|
1300 sym_rec->protect (); |
|
|
1301 } |
|
|
1302 |
|
|
1303 void |
|
1755
|
1304 install_builtin_function (const builtin_function& f) |
|
593
|
1305 { |
|
1755
|
1306 symbol_record *sym_rec = global_sym_tab->lookup (f.name, 1); |
|
593
|
1307 sym_rec->unprotect (); |
|
|
1308 |
|
1755
|
1309 tree_builtin *def = new tree_builtin (f.fcn, f.name); |
|
593
|
1310 |
|
1755
|
1311 sym_rec->define (def, f.is_text_fcn); |
|
593
|
1312 |
|
1755
|
1313 sym_rec->document (f.help_string); |
|
593
|
1314 sym_rec->make_eternal (); |
|
|
1315 sym_rec->protect (); |
|
|
1316 } |
|
|
1317 |
|
|
1318 void |
|
1755
|
1319 install_builtin_variable (const builtin_variable& v) |
|
593
|
1320 { |
|
1755
|
1321 if (v.install_as_function) |
|
|
1322 install_builtin_variable_as_function (v.name, v.value, v.protect, |
|
|
1323 v.eternal, v.help_string); |
|
529
|
1324 else |
|
1755
|
1325 bind_builtin_variable (v.name, v.value, v.protect, v.eternal, |
|
|
1326 v.sv_function, v.help_string); |
|
529
|
1327 } |
|
|
1328 |
|
593
|
1329 void |
|
2390
|
1330 install_builtin_variable_as_function (const string& name, |
|
|
1331 const octave_value& val, |
|
593
|
1332 int protect, int eternal, |
|
1755
|
1333 const string& help) |
|
529
|
1334 { |
|
593
|
1335 symbol_record *sym_rec = global_sym_tab->lookup (name, 1); |
|
|
1336 sym_rec->unprotect (); |
|
|
1337 |
|
1755
|
1338 string tmp_help = help.empty () ? sym_rec->help () : help; |
|
593
|
1339 |
|
|
1340 sym_rec->define_as_fcn (val); |
|
|
1341 |
|
|
1342 sym_rec->document (tmp_help); |
|
|
1343 |
|
|
1344 if (protect) |
|
|
1345 sym_rec->protect (); |
|
|
1346 |
|
|
1347 if (eternal) |
|
|
1348 sym_rec->make_eternal (); |
|
|
1349 } |
|
|
1350 |
|
|
1351 void |
|
1755
|
1352 alias_builtin (const string& alias, const string& name) |
|
593
|
1353 { |
|
|
1354 symbol_record *sr_name = global_sym_tab->lookup (name, 0, 0); |
|
1755
|
1355 |
|
593
|
1356 if (! sr_name) |
|
|
1357 panic ("can't alias to undefined name!"); |
|
|
1358 |
|
|
1359 symbol_record *sr_alias = global_sym_tab->lookup (alias, 1, 0); |
|
|
1360 |
|
|
1361 if (sr_alias) |
|
|
1362 sr_alias->alias (sr_name); |
|
|
1363 else |
|
1755
|
1364 panic ("can't find symbol record for builtin function `%s'", |
|
|
1365 alias.c_str ()); |
|
529
|
1366 } |
|
|
1367 |
|
593
|
1368 // Defining variables. |
|
|
1369 |
|
1161
|
1370 #if 0 |
|
593
|
1371 void |
|
|
1372 bind_nargin_and_nargout (symbol_table *sym_tab, int nargin, int nargout) |
|
529
|
1373 { |
|
2086
|
1374 octave_value *tmp; |
|
593
|
1375 symbol_record *sr; |
|
|
1376 |
|
|
1377 sr = sym_tab->lookup ("nargin", 1, 0); |
|
|
1378 sr->unprotect (); |
|
2086
|
1379 tmp = new octave_value (nargin); |
|
593
|
1380 sr->define (tmp); |
|
|
1381 |
|
|
1382 sr = sym_tab->lookup ("nargout", 1, 0); |
|
|
1383 sr->unprotect (); |
|
2086
|
1384 tmp = new octave_value (nargout); |
|
593
|
1385 sr->define (tmp); |
|
|
1386 } |
|
1161
|
1387 #endif |
|
593
|
1388 |
|
1162
|
1389 void |
|
2086
|
1390 bind_ans (const octave_value& val, int print) |
|
1162
|
1391 { |
|
|
1392 static symbol_record *sr = global_sym_tab->lookup ("ans", 1, 0); |
|
|
1393 |
|
1281
|
1394 tree_identifier *ans_id = new tree_identifier (sr); |
|
2390
|
1395 tree_constant *tmp = new tree_constant (val); |
|
1162
|
1396 |
|
1281
|
1397 // XXX FIXME XXX -- making ans_id static, passing its address to |
|
|
1398 // tree_simple_assignment_expression along with a flag to not delete |
|
|
1399 // it seems to create a memory leak. Hmm. |
|
|
1400 |
|
1827
|
1401 tree_simple_assignment_expression tmp_ass (ans_id, tmp, false, true); |
|
1162
|
1402 |
|
|
1403 tmp_ass.eval (print); |
|
|
1404 } |
|
|
1405 |
|
1489
|
1406 void |
|
|
1407 bind_global_error_variable (void) |
|
|
1408 { |
|
|
1409 *error_message_buffer << ends; |
|
|
1410 |
|
|
1411 char *error_text = error_message_buffer->str (); |
|
|
1412 |
|
|
1413 bind_builtin_variable ("__error_text__", error_text, 1); |
|
|
1414 |
|
|
1415 delete [] error_text; |
|
|
1416 |
|
|
1417 delete error_message_buffer; |
|
|
1418 |
|
|
1419 error_message_buffer = 0; |
|
|
1420 } |
|
|
1421 |
|
|
1422 void |
|
|
1423 clear_global_error_variable (void *) |
|
|
1424 { |
|
|
1425 delete error_message_buffer; |
|
|
1426 error_message_buffer = 0; |
|
|
1427 |
|
|
1428 bind_builtin_variable ("__error_text__", "", 1); |
|
|
1429 } |
|
|
1430 |
|
593
|
1431 // Give a global variable a definition. This will insert the symbol |
|
|
1432 // in the global table if necessary. |
|
|
1433 |
|
|
1434 // How is this different than install_builtin_variable? Are both |
|
|
1435 // functions needed? |
|
|
1436 |
|
|
1437 void |
|
2390
|
1438 bind_builtin_variable (const string& varname, const octave_value& val, |
|
593
|
1439 int protect, int eternal, sv_Function sv_fcn, |
|
1755
|
1440 const string& help) |
|
593
|
1441 { |
|
|
1442 symbol_record *sr = global_sym_tab->lookup (varname, 1, 0); |
|
|
1443 |
|
1271
|
1444 // It is a programming error for a builtin symbol to be missing. |
|
|
1445 // Besides, we just inserted it, so it must be there. |
|
593
|
1446 |
|
|
1447 assert (sr); |
|
|
1448 |
|
|
1449 sr->unprotect (); |
|
|
1450 |
|
1271
|
1451 // Must do this before define, since define will call the special |
|
|
1452 // variable function only if it knows about it, and it needs to, so |
|
|
1453 // that user prefs can be properly initialized. |
|
593
|
1454 |
|
|
1455 if (sv_fcn) |
|
|
1456 sr->set_sv_function (sv_fcn); |
|
|
1457 |
|
|
1458 sr->define_builtin_var (val); |
|
|
1459 |
|
|
1460 if (protect) |
|
|
1461 sr->protect (); |
|
|
1462 |
|
|
1463 if (eternal) |
|
|
1464 sr->make_eternal (); |
|
|
1465 |
|
1755
|
1466 sr->document (help); |
|
529
|
1467 } |
|
|
1468 |
|
2205
|
1469 // XXX FIXME XXX -- some of these should do their own checking to be |
|
|
1470 // able to provide more meaningful warning or error messages. |
|
|
1471 |
|
|
1472 static int |
|
|
1473 echo_executing_commands (void) |
|
|
1474 { |
|
|
1475 Vecho_executing_commands = check_preference ("echo_executing_commands"); |
|
|
1476 |
|
|
1477 return 0; |
|
|
1478 } |
|
|
1479 |
|
|
1480 static int |
|
|
1481 history_size (void) |
|
|
1482 { |
|
|
1483 double val; |
|
|
1484 if (builtin_real_scalar_variable ("history_size", val) |
|
|
1485 && ! xisnan (val)) |
|
|
1486 { |
|
|
1487 int ival = NINT (val); |
|
|
1488 if (ival >= 0 && (double) ival == val) |
|
|
1489 { |
|
|
1490 Vhistory_size = ival; |
|
|
1491 octave_command_history.set_size (ival); |
|
|
1492 return 0; |
|
|
1493 } |
|
|
1494 } |
|
|
1495 gripe_invalid_value_specified ("history_size"); |
|
|
1496 return -1; |
|
|
1497 } |
|
|
1498 |
|
|
1499 static int |
|
|
1500 history_file (void) |
|
|
1501 { |
|
|
1502 int status = 0; |
|
|
1503 |
|
|
1504 string s = builtin_string_variable ("history_file"); |
|
2065
|
1505 |
|
2205
|
1506 if (s.empty ()) |
|
|
1507 { |
|
|
1508 gripe_invalid_value_specified ("history_file"); |
|
|
1509 status = -1; |
|
|
1510 } |
|
|
1511 else |
|
|
1512 { |
|
|
1513 Vhistory_file = s; |
|
|
1514 octave_command_history.set_file (oct_tilde_expand (s)); |
|
|
1515 } |
|
|
1516 |
|
|
1517 return status; |
|
|
1518 } |
|
|
1519 |
|
|
1520 static int |
|
|
1521 ignore_function_time_stamp (void) |
|
|
1522 { |
|
|
1523 int pref = 0; |
|
|
1524 |
|
|
1525 string val = builtin_string_variable ("ignore_function_time_stamp"); |
|
|
1526 |
|
|
1527 if (! val.empty ()) |
|
|
1528 { |
|
|
1529 if (val.compare ("all", 0, 3) == 0) |
|
|
1530 pref = 2; |
|
|
1531 if (val.compare ("system", 0, 6) == 0) |
|
|
1532 pref = 1; |
|
|
1533 } |
|
|
1534 |
|
|
1535 Vignore_function_time_stamp = pref; |
|
|
1536 |
|
|
1537 return 0; |
|
|
1538 } |
|
|
1539 |
|
|
1540 static int |
|
|
1541 saving_history (void) |
|
|
1542 { |
|
|
1543 Vsaving_history = check_preference ("saving_history"); |
|
|
1544 |
|
|
1545 octave_command_history.ignore_entries (! Vsaving_history); |
|
|
1546 |
|
|
1547 return 0; |
|
|
1548 } |
|
|
1549 |
|
|
1550 // XXX FIXME XXX -- there still may be better places for some of these |
|
|
1551 // to be defined. |
|
2065
|
1552 |
|
|
1553 static void |
|
2205
|
1554 symbols_of_variables (void) |
|
529
|
1555 { |
|
1957
|
1556 DEFVAR (ans, , 0, 0, |
|
593
|
1557 ""); |
|
|
1558 |
|
1957
|
1559 DEFCONST (argv, , 0, 0, |
|
1343
|
1560 "the command line arguments this program was invoked with"); |
|
|
1561 |
|
2205
|
1562 DEFVAR (echo_executing_commands, (double) ECHO_OFF, 0, |
|
|
1563 echo_executing_commands, |
|
|
1564 "echo commands as they are executed"); |
|
|
1565 |
|
1957
|
1566 DEFCONST (error_text, "", 0, 0, |
|
1489
|
1567 "the text of error messages that would have been printed in the |
|
|
1568 body of the most recent unwind_protect statement or the TRY part of\n\ |
|
|
1569 the most recent eval() command. Outside of unwind_protect and\n\ |
|
|
1570 eval(), or if no error has ocurred within them, the value of\n\ |
|
|
1571 __error_text__ is guaranteed to be the empty string."); |
|
|
1572 |
|
2205
|
1573 DEFVAR (history_file, default_history_file (), 0, history_file, |
|
1646
|
1574 "name of command history file"); |
|
|
1575 |
|
1957
|
1576 DEFVAR (history_size, default_history_size (), 0, history_size, |
|
1646
|
1577 "number of commands to save in the history list"); |
|
|
1578 |
|
1957
|
1579 DEFVAR (ignore_function_time_stamp, "system", 0, ignore_function_time_stamp, |
|
593
|
1580 "don't check to see if function files have changed since they were\n\ |
|
|
1581 last compiled. Possible values are \"system\" and \"all\""); |
|
|
1582 |
|
2205
|
1583 DEFCONST (program_invocation_name, Vprogram_invocation_name, 0, 0, |
|
1343
|
1584 "the full name of the current program or script, including the\n\ |
|
|
1585 directory specification"); |
|
|
1586 |
|
2205
|
1587 DEFCONST (program_name, Vprogram_name, 0, 0, |
|
1343
|
1588 "the name of the current program or script"); |
|
|
1589 |
|
1957
|
1590 DEFVAR (saving_history, 1.0, 0, saving_history, |
|
1643
|
1591 "save command history"); |
|
529
|
1592 } |
|
|
1593 |
|
2065
|
1594 void |
|
|
1595 install_builtin_variables (void) |
|
|
1596 { |
|
2205
|
1597 symbols_of_data (); |
|
|
1598 symbols_of_defaults (); |
|
|
1599 symbols_of_dirfns (); |
|
2181
|
1600 symbols_of_error (); |
|
2205
|
1601 symbols_of_file_io (); |
|
|
1602 symbols_of_help (); |
|
2181
|
1603 symbols_of_input (); |
|
|
1604 symbols_of_lex (); |
|
2205
|
1605 symbols_of_load_save (); |
|
2097
|
1606 symbols_of_pager (); |
|
2181
|
1607 symbols_of_parse (); |
|
|
1608 symbols_of_pr_output (); |
|
|
1609 symbols_of_pt_fcn (); |
|
|
1610 symbols_of_pt_mat (); |
|
|
1611 symbols_of_pt_plot (); |
|
2076
|
1612 symbols_of_syscalls (); |
|
2390
|
1613 symbols_of_value (); |
|
2205
|
1614 symbols_of_variables (); |
|
2065
|
1615 } |
|
|
1616 |
|
593
|
1617 // Deleting names from the symbol tables. |
|
|
1618 |
|
1957
|
1619 DEFUN_TEXT (clear, args, , |
|
668
|
1620 "clear [-x] [name ...]\n\ |
|
|
1621 \n\ |
|
|
1622 Clear symbol(s) matching a list of globbing patterns.\n\ |
|
593
|
1623 \n\ |
|
668
|
1624 If no arguments are given, clear all user-defined variables and |
|
|
1625 functions.\n\ |
|
|
1626 \n\ |
|
|
1627 With -x, exclude the named variables") |
|
529
|
1628 { |
|
2086
|
1629 octave_value_list retval; |
|
593
|
1630 |
|
1755
|
1631 int argc = args.length () + 1; |
|
593
|
1632 |
|
1968
|
1633 string_vector argv = args.make_argv ("clear"); |
|
1755
|
1634 |
|
|
1635 if (error_state) |
|
|
1636 return retval; |
|
668
|
1637 |
|
1271
|
1638 // Always clear the local table, but don't clear currently compiled |
|
|
1639 // functions unless we are at the top level. (Allowing that to |
|
|
1640 // happen inside functions would result in pretty odd behavior...) |
|
593
|
1641 |
|
|
1642 int clear_user_functions = (curr_sym_tab == top_level_sym_tab); |
|
|
1643 |
|
1755
|
1644 if (argc == 1) |
|
593
|
1645 { |
|
|
1646 curr_sym_tab->clear (); |
|
|
1647 global_sym_tab->clear (clear_user_functions); |
|
|
1648 } |
|
529
|
1649 else |
|
|
1650 { |
|
668
|
1651 int exclusive = 0; |
|
|
1652 |
|
1755
|
1653 int idx = 1; |
|
|
1654 |
|
|
1655 if (argc > 1) |
|
668
|
1656 { |
|
1755
|
1657 if (argv[idx] == "-x") |
|
|
1658 exclusive = 1; |
|
668
|
1659 } |
|
|
1660 |
|
|
1661 int lcount = 0; |
|
|
1662 int gcount = 0; |
|
|
1663 int fcount = 0; |
|
529
|
1664 |
|
1755
|
1665 string_vector lvars; |
|
|
1666 string_vector gvars; |
|
|
1667 string_vector fcns; |
|
668
|
1668 |
|
|
1669 if (argc > 0) |
|
593
|
1670 { |
|
893
|
1671 lvars = curr_sym_tab->list (lcount, 0, 0, 0, |
|
1418
|
1672 SYMTAB_VARIABLES, |
|
668
|
1673 SYMTAB_LOCAL_SCOPE); |
|
|
1674 |
|
893
|
1675 gvars = curr_sym_tab->list (gcount, 0, 0, 0, |
|
1418
|
1676 SYMTAB_VARIABLES, |
|
668
|
1677 SYMTAB_GLOBAL_SCOPE); |
|
|
1678 |
|
893
|
1679 fcns = global_sym_tab->list (fcount, 0, 0, 0, |
|
|
1680 symbol_def::USER_FUNCTION, |
|
864
|
1681 SYMTAB_ALL_SCOPES); |
|
668
|
1682 } |
|
|
1683 |
|
2438
|
1684 // XXX FIXME XXX -- this needs to be optimized to avoid the |
|
|
1685 // pattern matching code if the string doesn't contain any |
|
|
1686 // globbing patterns. |
|
|
1687 |
|
1970
|
1688 for (int k = idx; k < argc; k++) |
|
668
|
1689 { |
|
1755
|
1690 string patstr = argv[k]; |
|
668
|
1691 |
|
1755
|
1692 if (! patstr.empty ()) |
|
593
|
1693 { |
|
1792
|
1694 glob_match pattern (patstr); |
|
1755
|
1695 |
|
593
|
1696 int i; |
|
|
1697 for (i = 0; i < lcount; i++) |
|
|
1698 { |
|
1755
|
1699 string nm = lvars[i]; |
|
1792
|
1700 int match = pattern.match (nm); |
|
668
|
1701 if ((exclusive && ! match) || (! exclusive && match)) |
|
|
1702 curr_sym_tab->clear (nm); |
|
593
|
1703 } |
|
529
|
1704 |
|
593
|
1705 int count; |
|
|
1706 for (i = 0; i < gcount; i++) |
|
|
1707 { |
|
1755
|
1708 string nm = gvars[i]; |
|
1792
|
1709 int match = pattern.match (nm); |
|
668
|
1710 if ((exclusive && ! match) || (! exclusive && match)) |
|
593
|
1711 { |
|
668
|
1712 count = curr_sym_tab->clear (nm); |
|
593
|
1713 if (count > 0) |
|
668
|
1714 global_sym_tab->clear (nm, clear_user_functions); |
|
593
|
1715 } |
|
|
1716 } |
|
529
|
1717 |
|
593
|
1718 for (i = 0; i < fcount; i++) |
|
|
1719 { |
|
1755
|
1720 string nm = fcns[i]; |
|
1792
|
1721 int match = pattern.match (nm); |
|
668
|
1722 if ((exclusive && ! match) || (! exclusive && match)) |
|
593
|
1723 { |
|
668
|
1724 count = curr_sym_tab->clear (nm); |
|
864
|
1725 global_sym_tab->clear (nm, clear_user_functions); |
|
593
|
1726 } |
|
|
1727 } |
|
|
1728 } |
|
|
1729 } |
|
|
1730 } |
|
|
1731 |
|
|
1732 return retval; |
|
529
|
1733 } |
|
|
1734 |
|
1
|
1735 /* |
|
|
1736 ;;; Local Variables: *** |
|
|
1737 ;;; mode: C++ *** |
|
|
1738 ;;; End: *** |
|
|
1739 */ |
