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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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1297
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23 #if defined (__GNUG__) |
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24 #pragma implementation |
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25 #endif |
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26 |
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240
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27 #ifdef HAVE_CONFIG_H |
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1192
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28 #include <config.h> |
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29 #endif |
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30 |
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3013
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31 #include <cassert> |
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1962
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32 #include <cctype> |
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3013
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33 #include <climits> |
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34 |
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3503
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35 #include <iomanip> |
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36 #include <fstream> |
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1962
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37 |
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2926
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38 #include "glob-match.h" |
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1755
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39 #include "str-vec.h" |
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40 |
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3308
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41 #include "defun.h" |
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1352
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42 #include "error.h" |
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2979
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43 #include "oct-lvalue.h" |
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2975
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44 #include "ov.h" |
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3356
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45 #include "pt-pr-code.h" |
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1755
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46 #include "symtab.h" |
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1
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47 #include "utils.h" |
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1352
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48 #include "variables.h" |
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1
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49 |
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3308
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50 // Should variables be allowed to hide functions of the same name? A |
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51 // positive value means yes. A negative value means yes, but print a |
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52 // warning message. Zero means it should be considered an error. |
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53 static int Vvariables_can_hide_functions; |
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54 |
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3013
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55 octave_allocator |
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56 symbol_record::symbol_def::allocator (sizeof (symbol_record::symbol_def)); |
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195
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57 |
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3355
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58 #define SYMBOL_DEF symbol_record::symbol_def |
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59 |
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3536
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60 std::string |
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61 SYMBOL_DEF::type_as_string (void) const |
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62 { |
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3523
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63 std::string retval = "<unknown type>"; |
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64 |
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65 if (is_user_variable ()) |
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66 retval = "user-defined variable"; |
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67 else if (is_text_function ()) |
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68 retval = "built-in text function"; |
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69 else if (is_mapper_function ()) |
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70 retval = "built-in mapper function"; |
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71 else if (is_user_function ()) |
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72 retval = "user-defined function"; |
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73 else if (is_builtin_constant ()) |
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74 retval = "built-in constant"; |
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75 else if (is_builtin_variable ()) |
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76 retval = "built-in variable"; |
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77 else if (is_builtin_function ()) |
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78 retval = "built-in function"; |
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79 else if (is_dld_function ()) |
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80 retval = "dynamically-linked function"; |
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81 |
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82 return retval; |
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83 } |
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84 |
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3356
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85 void |
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3523
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86 SYMBOL_DEF::type (std::ostream& os, const std::string& name, bool pr_type_info, |
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3356
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87 bool quiet, bool pr_orig_txt) |
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88 { |
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89 if (is_user_function ()) |
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90 { |
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91 octave_function *defn = definition.function_value (); |
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92 |
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93 std::string fn = defn ? defn->fcn_file_name () : std::string (); |
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94 |
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95 if (pr_orig_txt && ! fn.empty ()) |
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96 { |
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3544
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97 std::ifstream fs (fn.c_str (), std::ios::in); |
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98 |
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99 if (fs) |
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100 { |
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101 if (pr_type_info && ! quiet) |
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102 os << name << " is the " << type_as_string () |
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103 << " defined from: " << fn << "\n\n"; |
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104 |
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105 char ch; |
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106 |
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107 while (fs.get (ch)) |
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108 os << ch; |
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109 } |
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110 else |
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111 os << "unable to open `" << fn << "' for reading!\n"; |
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112 } |
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113 else |
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114 { |
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115 if (pr_type_info && ! quiet) |
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116 os << name << " is a " << type_as_string () << ":\n\n"; |
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117 |
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118 tree_print_code tpc (os, "", pr_orig_txt); |
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119 |
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120 defn->accept (tpc); |
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121 } |
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122 } |
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123 else if (is_user_variable () |
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124 || is_builtin_variable () |
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125 || is_builtin_constant ()) |
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126 { |
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127 if (pr_type_info && ! quiet) |
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128 os << name << " is a " << type_as_string () << "\n"; |
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129 |
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130 definition.print_raw (os, true); |
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131 |
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132 if (pr_type_info) |
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133 os << "\n"; |
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134 } |
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135 else |
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136 os << name << " is a " << type_as_string () << "\n"; |
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137 } |
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138 |
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3536
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139 std::string |
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3523
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140 SYMBOL_DEF::which (const std::string& name) |
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3355
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141 { |
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3523
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142 std::string retval; |
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3355
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143 |
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144 if (is_user_function () || is_dld_function ()) |
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145 { |
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146 octave_function *defn = definition.function_value (); |
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147 |
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148 if (defn) |
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149 retval = defn->fcn_file_name (); |
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150 } |
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151 else |
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152 retval = name + " is a " + type_as_string (); |
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153 |
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154 return retval; |
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155 } |
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156 |
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3239
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157 void |
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3523
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158 SYMBOL_DEF::which (std::ostream& os, const std::string& name) |
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159 { |
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160 os << name; |
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161 |
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162 if (is_user_function () || is_dld_function ()) |
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163 { |
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164 octave_function *defn = definition.function_value (); |
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165 |
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3523
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166 std::string fn = defn ? defn->fcn_file_name () : std::string (); |
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167 |
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168 if (! fn.empty ()) |
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169 { |
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170 os << " is the " << type_as_string () << " from the file\n" |
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171 << fn << "\n"; |
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172 |
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173 return; |
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174 } |
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175 } |
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176 |
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177 os << " is a " << type_as_string () << "\n"; |
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178 } |
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179 |
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180 void |
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3944
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181 SYMBOL_DEF::print_info (std::ostream& os, const std::string& prefix) const |
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3239
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182 { |
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3933
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183 os << prefix << "symbol_def::count: " << count << "\n"; |
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184 |
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185 definition.print_info (os, prefix + " "); |
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3239
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186 } |
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187 |
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767
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188 // Individual records in a symbol table. |
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189 |
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3013
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190 // XXX FIXME XXX -- there are lots of places below where we should |
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191 // probably be temporarily ignoring interrupts. |
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1
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192 |
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572
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193 void |
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3523
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194 symbol_record::rename (const std::string& new_name) |
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572
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195 { |
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2791
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196 if (! read_only_error ("rename")) |
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197 nm = new_name; |
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572
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198 } |
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199 |
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3013
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200 void |
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201 symbol_record::define (const octave_value& v, unsigned int sym_type) |
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195
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202 { |
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3013
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203 if (! (is_variable () && read_only_error ("redefine"))) |
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204 { |
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205 if (definition->type () == symbol_record::BUILTIN_VARIABLE) |
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206 sym_type = symbol_record::BUILTIN_VARIABLE; |
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207 |
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3013
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208 definition->define (v, sym_type); |
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195
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209 } |
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210 } |
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211 |
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212 void |
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3013
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213 symbol_record::define_builtin_var (const octave_value& v) |
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195
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214 { |
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3013
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215 define (v, symbol_record::BUILTIN_VARIABLE); |
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195
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216 |
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3013
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217 if (chg_fcn) |
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218 chg_fcn (); |
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1
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219 } |
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220 |
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3013
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221 bool |
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3258
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222 symbol_record::define_builtin_const (const octave_value& v) |
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1
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223 { |
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3013
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224 bool retval = false; |
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1
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225 |
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3258
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226 if (! read_only_error ("redefine")) |
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195
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227 { |
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3811
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228 definition->define (v, symbol_record::BUILTIN_CONSTANT); |
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2893
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229 |
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3013
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230 retval = true; |
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1
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231 } |
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232 |
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2893
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233 return retval; |
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2390
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234 } |
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235 |
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3013
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236 bool |
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237 symbol_record::define (octave_function *f, unsigned int sym_type) |
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1
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238 { |
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3013
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239 bool retval = false; |
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2949
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240 |
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3013
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241 if (! read_only_error ("redefine")) |
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242 { |
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243 octave_value tmp (f); |
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244 |
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4009
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245 delete definition; |
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246 |
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247 definition = new symbol_def (tmp, sym_type); |
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3013
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248 |
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249 retval = true; |
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250 } |
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2949
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251 |
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252 return retval; |
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1
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253 } |
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254 |
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255 void |
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195
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256 symbol_record::clear (void) |
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1
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257 { |
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4009
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258 if (! tagged_static) |
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1
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259 { |
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3013
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260 if (--definition->count <= 0) |
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261 delete definition; |
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262 |
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263 definition = new symbol_def (); |
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4009
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264 } |
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3013
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265 |
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4009
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266 if (linked_to_global) |
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267 linked_to_global = 0; |
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1
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268 } |
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269 |
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270 void |
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4009
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271 symbol_record::alias (symbol_record *s) |
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1
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272 { |
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3013
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273 chg_fcn = s->chg_fcn; |
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195
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274 |
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4009
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275 if (--definition->count <= 0) |
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276 delete definition; |
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277 |
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278 definition = (s->definition); |
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3013
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279 |
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280 definition->count++; |
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1
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281 } |
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282 |
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283 void |
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284 symbol_record::mark_as_formal_parameter (void) |
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285 { |
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3013
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286 if (is_linked_to_global ()) |
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287 error ("can't mark global variable `%s' as function parameter", |
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288 nm.c_str ()); |
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289 else if (is_static ()) |
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290 error ("can't mark static variable `%s' as function paraemter", |
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291 nm.c_str ()); |
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292 else |
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293 formal_param = 1; |
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1
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294 } |
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295 |
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296 void |
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195
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297 symbol_record::mark_as_linked_to_global (void) |
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122
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298 { |
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2975
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299 if (is_formal_parameter ()) |
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300 error ("can't make function parameter `%s' global", nm.c_str ()); |
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301 else if (is_static ()) |
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302 error ("can't make static variable `%s' global", nm.c_str ()); |
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303 else |
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304 linked_to_global = 1; |
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122
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305 } |
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306 |
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2846
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307 void |
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308 symbol_record::mark_as_static (void) |
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309 { |
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310 if (is_linked_to_global ()) |
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2975
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311 error ("can't make global variable `%s' static", nm.c_str ()); |
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2846
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312 else if (is_formal_parameter ()) |
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2975
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313 error ("can't make formal parameter `%s' static", nm.c_str ()); |
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2846
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314 else |
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315 tagged_static = 1; |
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316 } |
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317 |
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2975
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318 octave_value& |
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319 symbol_record::variable_value (void) |
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2390
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320 { |
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2975
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321 static octave_value foo; |
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2390
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322 |
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2975
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323 return is_variable () ? def () : foo; |
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2390
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324 } |
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325 |
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3258
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326 inline void |
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327 symbol_record::link_to_builtin_variable (void) |
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328 { |
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4009
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329 symbol_record *tmp_sym = fbi_sym_tab->lookup (name ()); |
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3258
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330 |
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331 if (tmp_sym && tmp_sym->is_builtin_variable ()) |
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332 alias (tmp_sym); |
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333 } |
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334 |
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335 |
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2979
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336 octave_lvalue |
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2390
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337 symbol_record::variable_reference (void) |
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338 { |
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3308
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339 if (Vvariables_can_hide_functions <= 0 |
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340 && (is_function () |
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341 || (! is_defined () && is_valid_function (nm)))) |
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342 { |
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343 if (Vvariables_can_hide_functions < 0) |
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344 warning ("variable `%s' hides function", nm.c_str ()); |
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345 else |
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346 { |
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347 error ("variable `%s' hides function", nm.c_str ()); |
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348 return octave_lvalue (); |
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349 } |
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350 } |
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351 |
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3258
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352 if (is_function () || is_constant ()) |
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2390
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353 clear (); |
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354 |
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355 if (! is_defined ()) |
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356 { |
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357 if (! (is_formal_parameter () || is_linked_to_global ())) |
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3258
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358 link_to_builtin_variable (); |
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2390
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359 |
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360 if (! is_defined ()) |
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2975
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361 { |
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362 octave_value tmp; |
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363 define (tmp); |
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364 } |
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2390
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365 } |
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366 |
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3013
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367 return octave_lvalue (&(def ()), chg_fcn); |
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195
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368 } |
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369 |
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220
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370 void |
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371 symbol_record::push_context (void) |
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372 { |
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2846
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373 if (! is_static ()) |
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374 { |
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375 context.push (definition); |
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3013
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376 |
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377 definition = new symbol_def (); |
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395
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378 |
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2893
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379 global_link_context.push (static_cast<unsigned int> (linked_to_global)); |
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3013
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380 |
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2846
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381 linked_to_global = 0; |
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382 } |
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220
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383 } |
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384 |
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385 void |
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386 symbol_record::pop_context (void) |
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387 { |
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1653
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388 // It is possible for context to be empty if new symbols have been |
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389 // inserted in the symbol table during recursive calls. This can |
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390 // happen as a result of calls to eval() and feval(). |
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220
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391 |
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1653
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392 if (! context.empty ()) |
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220
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393 { |
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4009
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394 if (--definition->count <= 0) |
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395 delete definition; |
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396 |
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397 definition = context.pop (); |
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1653
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398 |
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399 linked_to_global = global_link_context.pop (); |
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220
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400 } |
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401 } |
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402 |
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3013
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403 void |
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3933
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404 symbol_record::print_symbol_info_line (std::ostream& os) const |
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3013
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405 { |
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406 os << (is_read_only () ? " r-" : " rw") |
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407 << (is_eternal () ? "-" : "d") |
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408 << " " |
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3548
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409 << std::setiosflags (std::ios::left) << std::setw (24) |
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410 << type_name () . c_str (); |
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3013
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411 |
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3548
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412 os << std::resetiosflags (std::ios::left); |
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3013
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413 |
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414 int nr = rows (); |
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415 int nc = columns (); |
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416 |
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417 if (nr < 0) |
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418 os << " -"; |
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419 else |
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3548
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420 os << std::setiosflags (std::ios::right) << std::setw (7) << nr; |
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3013
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421 |
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422 if (nc < 0) |
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423 os << " -"; |
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424 else |
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3548
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425 os << std::setiosflags (std::ios::right) << std::setw (7) << nc; |
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3013
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426 |
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3548
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427 os << std::resetiosflags (std::ios::right); |
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3013
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428 |
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429 os << " " << name () << "\n"; |
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430 } |
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431 |
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3239
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432 void |
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3944
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433 symbol_record::print_info (std::ostream& os, const std::string& prefix) const |
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3239
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434 { |
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435 if (definition) |
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3933
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436 definition->print_info (os, prefix); |
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3239
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437 else |
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3933
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438 os << prefix << "symbol " << name () << " is undefined\n"; |
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3239
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439 } |
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440 |
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3013
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441 bool |
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2791
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442 symbol_record::read_only_error (const char *action) |
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195
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443 { |
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444 if (is_read_only ()) |
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445 { |
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3258
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446 if (is_variable () || is_constant ()) |
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3013
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447 ::error ("can't %s read-only constant `%s'", action, nm.c_str ()); |
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195
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448 else if (is_function ()) |
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3013
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449 ::error ("can't %s read-only function `%s'", action, nm.c_str ()); |
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1045
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450 else |
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3013
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451 ::error ("can't %s read-only symbol `%s'", action, nm.c_str ()); |
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195
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452 |
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3013
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453 return true; |
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195
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454 } |
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455 else |
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3013
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456 return false; |
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195
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457 } |
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458 |
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767
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459 // A symbol table. |
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1
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460 |
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461 symbol_record * |
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3523
|
462 symbol_table::lookup (const std::string& nm, bool insert, bool warn) |
|
1
|
463 { |
|
3013
|
464 unsigned int index = hash (nm); |
|
1
|
465 |
|
|
466 symbol_record *ptr = table[index].next (); |
|
|
467 |
|
530
|
468 while (ptr) |
|
1
|
469 { |
|
1755
|
470 if (ptr->name () == nm) |
|
1
|
471 return ptr; |
|
3013
|
472 |
|
1
|
473 ptr = ptr->next (); |
|
|
474 } |
|
|
475 |
|
|
476 if (insert) |
|
|
477 { |
|
3013
|
478 symbol_record *sr = new symbol_record (nm, table[index].next ()); |
|
|
479 |
|
|
480 table[index].chain (sr); |
|
|
481 |
|
|
482 return sr; |
|
1
|
483 } |
|
|
484 else if (warn) |
|
3356
|
485 warning ("lookup: symbol `%s' not found", nm.c_str ()); |
|
1
|
486 |
|
530
|
487 return 0; |
|
1
|
488 } |
|
|
489 |
|
|
490 void |
|
3523
|
491 symbol_table::rename (const std::string& old_name, const std::string& new_name) |
|
572
|
492 { |
|
3013
|
493 unsigned int index = hash (old_name); |
|
572
|
494 |
|
|
495 symbol_record *prev = &table[index]; |
|
|
496 symbol_record *ptr = prev->next (); |
|
|
497 |
|
|
498 while (ptr) |
|
|
499 { |
|
1755
|
500 if (ptr->name () == old_name) |
|
572
|
501 { |
|
|
502 ptr->rename (new_name); |
|
|
503 |
|
2791
|
504 if (! error_state) |
|
|
505 { |
|
|
506 prev->chain (ptr->next ()); |
|
|
507 |
|
3013
|
508 index = hash (new_name); |
|
3125
|
509 ptr->chain (table[index].next ()); |
|
2791
|
510 table[index].chain (ptr); |
|
|
511 |
|
|
512 return; |
|
|
513 } |
|
|
514 |
|
|
515 break; |
|
572
|
516 } |
|
|
517 |
|
|
518 prev = ptr; |
|
|
519 ptr = ptr->next (); |
|
|
520 } |
|
|
521 |
|
1755
|
522 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
523 new_name.c_str ()); |
|
572
|
524 } |
|
|
525 |
|
4009
|
526 // XXX FIXME XXX -- it would be nice to eliminate a lot of the |
|
|
527 // following duplicate code. |
|
|
528 |
|
572
|
529 void |
|
4009
|
530 symbol_table::clear (void) |
|
|
531 { |
|
|
532 for (unsigned int i = 0; i < table_size; i++) |
|
|
533 { |
|
|
534 symbol_record *ptr = table[i].next (); |
|
|
535 |
|
|
536 while (ptr) |
|
|
537 { |
|
|
538 ptr->clear (); |
|
|
539 |
|
|
540 ptr = ptr->next (); |
|
|
541 } |
|
|
542 } |
|
|
543 } |
|
|
544 |
|
|
545 void |
|
|
546 symbol_table::clear_variables (void) |
|
|
547 { |
|
|
548 for (unsigned int i = 0; i < table_size; i++) |
|
|
549 { |
|
|
550 symbol_record *ptr = table[i].next (); |
|
|
551 |
|
|
552 while (ptr) |
|
|
553 { |
|
|
554 if (ptr->is_user_variable ()) |
|
|
555 ptr->clear (); |
|
|
556 |
|
|
557 ptr = ptr->next (); |
|
|
558 } |
|
|
559 } |
|
|
560 } |
|
|
561 |
|
|
562 // Really only clear functions that can be reloaded. |
|
|
563 |
|
|
564 void |
|
|
565 symbol_table::clear_functions (void) |
|
1
|
566 { |
|
3013
|
567 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
568 { |
|
169
|
569 symbol_record *ptr = table[i].next (); |
|
1
|
570 |
|
530
|
571 while (ptr) |
|
169
|
572 { |
|
4009
|
573 if (ptr->is_user_function () || ptr->is_dld_function ()) |
|
|
574 ptr->clear (); |
|
|
575 |
|
|
576 ptr = ptr->next (); |
|
|
577 } |
|
|
578 } |
|
|
579 } |
|
|
580 |
|
|
581 void |
|
|
582 symbol_table::clear_globals (void) |
|
|
583 { |
|
|
584 for (unsigned int i = 0; i < table_size; i++) |
|
|
585 { |
|
|
586 symbol_record *ptr = table[i].next (); |
|
|
587 |
|
|
588 while (ptr) |
|
|
589 { |
|
|
590 if (ptr->is_user_variable () && ptr->is_linked_to_global ()) |
|
|
591 ptr->clear (); |
|
195
|
592 |
|
169
|
593 ptr = ptr->next (); |
|
1
|
594 } |
|
|
595 } |
|
|
596 } |
|
|
597 |
|
3013
|
598 bool |
|
4009
|
599 symbol_table::clear (const std::string& nm) |
|
|
600 { |
|
|
601 unsigned int index = hash (nm); |
|
|
602 |
|
|
603 symbol_record *ptr = table[index].next (); |
|
|
604 |
|
|
605 while (ptr) |
|
|
606 { |
|
|
607 if (ptr->name () == nm) |
|
|
608 { |
|
|
609 ptr->clear (); |
|
|
610 return true; |
|
|
611 } |
|
|
612 ptr = ptr->next (); |
|
|
613 } |
|
|
614 |
|
|
615 return false; |
|
|
616 } |
|
|
617 |
|
|
618 bool |
|
|
619 symbol_table::clear_variable (const std::string& nm) |
|
|
620 { |
|
|
621 unsigned int index = hash (nm); |
|
|
622 |
|
|
623 symbol_record *ptr = table[index].next (); |
|
|
624 |
|
|
625 while (ptr) |
|
|
626 { |
|
|
627 if (ptr->name () == nm && ptr->is_user_variable ()) |
|
|
628 { |
|
|
629 ptr->clear (); |
|
|
630 return true; |
|
|
631 } |
|
|
632 ptr = ptr->next (); |
|
|
633 } |
|
|
634 |
|
|
635 return false; |
|
|
636 } |
|
|
637 |
|
|
638 bool |
|
|
639 symbol_table::clear_global (const std::string& nm) |
|
1
|
640 { |
|
3013
|
641 unsigned int index = hash (nm); |
|
1
|
642 |
|
195
|
643 symbol_record *ptr = table[index].next (); |
|
1
|
644 |
|
530
|
645 while (ptr) |
|
1
|
646 { |
|
1755
|
647 if (ptr->name () == nm |
|
4009
|
648 && ptr->is_user_variable () |
|
|
649 && ptr->is_linked_to_global ()) |
|
|
650 { |
|
|
651 ptr->clear (); |
|
|
652 return true; |
|
|
653 } |
|
|
654 ptr = ptr->next (); |
|
|
655 } |
|
|
656 |
|
|
657 return false; |
|
|
658 } |
|
|
659 |
|
|
660 // Really only clear functions that can be reloaded. |
|
|
661 |
|
|
662 bool |
|
|
663 symbol_table::clear_function (const std::string& nm) |
|
|
664 { |
|
|
665 unsigned int index = hash (nm); |
|
|
666 |
|
|
667 symbol_record *ptr = table[index].next (); |
|
|
668 |
|
|
669 while (ptr) |
|
|
670 { |
|
|
671 if (ptr->name () == nm |
|
|
672 && (ptr->is_user_function () || ptr->is_dld_function ())) |
|
1
|
673 { |
|
195
|
674 ptr->clear (); |
|
3013
|
675 return true; |
|
1
|
676 } |
|
195
|
677 ptr = ptr->next (); |
|
1
|
678 } |
|
|
679 |
|
3013
|
680 return false; |
|
1
|
681 } |
|
|
682 |
|
4009
|
683 bool |
|
|
684 symbol_table::clear_variable_pattern (const std::string& pat) |
|
|
685 { |
|
|
686 bool retval = false; |
|
|
687 |
|
|
688 for (unsigned int i = 0; i < table_size; i++) |
|
|
689 { |
|
|
690 symbol_record *ptr = table[i].next (); |
|
|
691 |
|
|
692 while (ptr) |
|
|
693 { |
|
|
694 if (ptr->is_user_variable ()) |
|
|
695 { |
|
|
696 glob_match pattern (pat); |
|
|
697 |
|
|
698 if (pattern.match (ptr->name ())) |
|
|
699 { |
|
|
700 ptr->clear (); |
|
|
701 |
|
|
702 retval = true; |
|
|
703 } |
|
|
704 } |
|
|
705 |
|
|
706 ptr = ptr->next (); |
|
|
707 } |
|
|
708 } |
|
|
709 |
|
|
710 return retval; |
|
|
711 } |
|
|
712 |
|
|
713 bool |
|
|
714 symbol_table::clear_global_pattern (const std::string& pat) |
|
|
715 { |
|
|
716 bool retval = false; |
|
|
717 |
|
|
718 for (unsigned int i = 0; i < table_size; i++) |
|
|
719 { |
|
|
720 symbol_record *ptr = table[i].next (); |
|
|
721 |
|
|
722 while (ptr) |
|
|
723 { |
|
|
724 if (ptr->is_user_variable () && ptr->is_linked_to_global ()) |
|
|
725 { |
|
|
726 glob_match pattern (pat); |
|
|
727 |
|
|
728 if (pattern.match (ptr->name ())) |
|
|
729 { |
|
|
730 ptr->clear (); |
|
|
731 |
|
|
732 retval = true; |
|
|
733 } |
|
|
734 } |
|
|
735 |
|
|
736 ptr = ptr->next (); |
|
|
737 } |
|
|
738 } |
|
|
739 |
|
|
740 return retval; |
|
|
741 } |
|
|
742 |
|
|
743 // Really only clear functions that can be reloaded. |
|
|
744 |
|
|
745 bool |
|
|
746 symbol_table::clear_function_pattern (const std::string& pat) |
|
|
747 { |
|
|
748 bool retval = false; |
|
|
749 |
|
|
750 for (unsigned int i = 0; i < table_size; i++) |
|
|
751 { |
|
|
752 symbol_record *ptr = table[i].next (); |
|
|
753 |
|
|
754 while (ptr) |
|
|
755 { |
|
|
756 if (ptr->is_user_function () || ptr->is_dld_function ()) |
|
|
757 { |
|
|
758 glob_match pattern (pat); |
|
|
759 |
|
|
760 if (pattern.match (ptr->name ())) |
|
|
761 { |
|
|
762 ptr->clear (); |
|
|
763 |
|
|
764 retval = true; |
|
|
765 } |
|
|
766 } |
|
|
767 |
|
|
768 ptr = ptr->next (); |
|
|
769 } |
|
|
770 } |
|
|
771 |
|
|
772 return retval; |
|
|
773 } |
|
|
774 |
|
1
|
775 int |
|
164
|
776 symbol_table::size (void) const |
|
1
|
777 { |
|
|
778 int count = 0; |
|
3013
|
779 |
|
|
780 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
781 { |
|
|
782 symbol_record *ptr = table[i].next (); |
|
3013
|
783 |
|
530
|
784 while (ptr) |
|
1
|
785 { |
|
|
786 count++; |
|
|
787 ptr = ptr->next (); |
|
|
788 } |
|
|
789 } |
|
3013
|
790 |
|
1
|
791 return count; |
|
|
792 } |
|
|
793 |
|
3013
|
794 static bool |
|
3523
|
795 matches_patterns (const std::string& name, const string_vector& pats) |
|
1
|
796 { |
|
3013
|
797 int npats = pats.length (); |
|
1
|
798 |
|
3013
|
799 if (npats == 0) |
|
|
800 return true; |
|
|
801 |
|
|
802 glob_match pattern (pats); |
|
|
803 |
|
|
804 return pattern.match (name); |
|
1
|
805 } |
|
|
806 |
|
3013
|
807 Array<symbol_record *> |
|
3355
|
808 symbol_table::symbol_list (const string_vector& pats, |
|
3013
|
809 unsigned int type, unsigned int scope) const |
|
1
|
810 { |
|
3355
|
811 int count = 0; |
|
3013
|
812 |
|
1
|
813 int n = size (); |
|
3013
|
814 |
|
3355
|
815 Array<symbol_record *> symbols (n); |
|
|
816 |
|
1
|
817 if (n == 0) |
|
3355
|
818 return symbols; |
|
3013
|
819 |
|
|
820 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
821 { |
|
|
822 symbol_record *ptr = table[i].next (); |
|
3013
|
823 |
|
530
|
824 while (ptr) |
|
1
|
825 { |
|
|
826 assert (count < n); |
|
867
|
827 |
|
2893
|
828 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
829 |
|
2893
|
830 unsigned int my_type = ptr->type (); |
|
867
|
831 |
|
3523
|
832 std::string my_name = ptr->name (); |
|
867
|
833 |
|
|
834 if ((type & my_type) && (scope & my_scope) |
|
3013
|
835 && matches_patterns (my_name, pats)) |
|
|
836 symbols(count++) = ptr; |
|
605
|
837 |
|
1
|
838 ptr = ptr->next (); |
|
|
839 } |
|
|
840 } |
|
1755
|
841 |
|
|
842 symbols.resize (count); |
|
1
|
843 |
|
3013
|
844 return symbols; |
|
|
845 } |
|
|
846 |
|
|
847 string_vector |
|
3355
|
848 symbol_table::name_list (const string_vector& pats, bool sort, |
|
3013
|
849 unsigned int type, unsigned int scope) const |
|
|
850 { |
|
3355
|
851 Array<symbol_record *> symbols = symbol_list (pats, type, scope); |
|
3013
|
852 |
|
|
853 string_vector names; |
|
|
854 |
|
|
855 int n = symbols.length (); |
|
|
856 |
|
|
857 if (n > 0) |
|
|
858 { |
|
|
859 names.resize (n); |
|
|
860 |
|
|
861 for (int i = 0; i < n; i++) |
|
|
862 names[i] = symbols(i)->name (); |
|
|
863 } |
|
|
864 |
|
|
865 if (sort) |
|
|
866 names.qsort (); |
|
|
867 |
|
|
868 return names; |
|
|
869 } |
|
|
870 |
|
|
871 static int |
|
3145
|
872 maybe_list_cmp_fcn (const void *a_arg, const void *b_arg) |
|
3013
|
873 { |
|
3145
|
874 const symbol_record *a = *(X_CAST (const symbol_record **, a_arg)); |
|
|
875 const symbol_record *b = *(X_CAST (const symbol_record **, b_arg)); |
|
3013
|
876 |
|
3523
|
877 std::string a_nm = a->name (); |
|
|
878 std::string b_nm = b->name (); |
|
3145
|
879 |
|
|
880 return a_nm.compare (b_nm); |
|
3013
|
881 } |
|
1
|
882 |
|
3013
|
883 int |
|
|
884 symbol_table::maybe_list (const char *header, const string_vector& argv, |
|
3523
|
885 std::ostream& os, bool show_verbose, |
|
3013
|
886 unsigned type, unsigned scope) |
|
|
887 { |
|
|
888 int status = 0; |
|
|
889 |
|
|
890 if (show_verbose) |
|
|
891 { |
|
3355
|
892 Array<symbol_record *> symbols = symbol_list (argv, type, scope); |
|
3013
|
893 |
|
|
894 int len = symbols.length (); |
|
|
895 |
|
3355
|
896 if (len > 0) |
|
3013
|
897 { |
|
|
898 os << "\n" << header << "\n\n" |
|
|
899 << "prot type rows cols name\n" |
|
|
900 << "==== ==== ==== ==== ====\n"; |
|
|
901 |
|
|
902 symbols.qsort (maybe_list_cmp_fcn); |
|
|
903 |
|
|
904 for (int i = 0; i < len; i++) |
|
|
905 symbols(i)->print_symbol_info_line (os); |
|
|
906 |
|
|
907 status = 1; |
|
|
908 } |
|
|
909 } |
|
|
910 else |
|
|
911 { |
|
3355
|
912 string_vector symbols = name_list (argv, 1, type, scope); |
|
3013
|
913 |
|
3355
|
914 if (! symbols.empty ()) |
|
3013
|
915 { |
|
|
916 os << "\n" << header << "\n\n"; |
|
|
917 |
|
|
918 symbols.list_in_columns (os); |
|
|
919 |
|
|
920 status = 1; |
|
|
921 } |
|
|
922 } |
|
|
923 |
|
|
924 return status; |
|
1
|
925 } |
|
|
926 |
|
3355
|
927 Array<symbol_record *> |
|
3523
|
928 symbol_table::glob (const std::string& pat, unsigned int type, |
|
2893
|
929 unsigned int scope) const |
|
605
|
930 { |
|
3355
|
931 int count = 0; |
|
|
932 |
|
605
|
933 int n = size (); |
|
3355
|
934 |
|
|
935 Array<symbol_record *> symbols (n); |
|
|
936 |
|
605
|
937 if (n == 0) |
|
3355
|
938 return symbols; |
|
3013
|
939 |
|
|
940 for (unsigned int i = 0; i < table_size; i++) |
|
605
|
941 { |
|
|
942 symbol_record *ptr = table[i].next (); |
|
3013
|
943 |
|
605
|
944 while (ptr) |
|
|
945 { |
|
|
946 assert (count < n); |
|
|
947 |
|
2893
|
948 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
949 |
|
2893
|
950 unsigned int my_type = ptr->type (); |
|
605
|
951 |
|
1792
|
952 glob_match pattern (pat); |
|
1755
|
953 |
|
605
|
954 if ((type & my_type) && (scope & my_scope) |
|
1792
|
955 && pattern.match (ptr->name ())) |
|
605
|
956 { |
|
3355
|
957 symbols(count++) = ptr; |
|
605
|
958 } |
|
|
959 |
|
|
960 ptr = ptr->next (); |
|
|
961 } |
|
|
962 } |
|
3355
|
963 |
|
|
964 symbols.resize (count); |
|
605
|
965 |
|
|
966 return symbols; |
|
|
967 } |
|
|
968 |
|
220
|
969 void |
|
|
970 symbol_table::push_context (void) |
|
|
971 { |
|
3013
|
972 for (unsigned int i = 0; i < table_size; i++) |
|
220
|
973 { |
|
|
974 symbol_record *ptr = table[i].next (); |
|
|
975 |
|
530
|
976 while (ptr) |
|
220
|
977 { |
|
|
978 ptr->push_context (); |
|
|
979 ptr = ptr->next (); |
|
|
980 } |
|
|
981 } |
|
|
982 } |
|
|
983 |
|
|
984 void |
|
|
985 symbol_table::pop_context (void) |
|
|
986 { |
|
3013
|
987 for (unsigned int i = 0; i < table_size; i++) |
|
220
|
988 { |
|
|
989 symbol_record *ptr = table[i].next (); |
|
|
990 |
|
530
|
991 while (ptr) |
|
220
|
992 { |
|
|
993 ptr->pop_context (); |
|
|
994 ptr = ptr->next (); |
|
|
995 } |
|
|
996 } |
|
|
997 } |
|
|
998 |
|
3013
|
999 void |
|
3944
|
1000 symbol_table::print_info (std::ostream& os) const |
|
3013
|
1001 { |
|
|
1002 int count = 0; |
|
|
1003 int empty_chains = 0; |
|
|
1004 int max_chain_length = 0; |
|
|
1005 int min_chain_length = INT_MAX; |
|
|
1006 |
|
|
1007 for (unsigned int i = 0; i < table_size; i++) |
|
|
1008 { |
|
|
1009 int num_this_chain = 0; |
|
|
1010 |
|
|
1011 symbol_record *ptr = table[i].next (); |
|
|
1012 |
|
|
1013 if (ptr) |
|
3933
|
1014 os << "chain number " << i << ":\n"; |
|
3013
|
1015 else |
|
|
1016 { |
|
|
1017 empty_chains++; |
|
|
1018 min_chain_length = 0; |
|
|
1019 } |
|
|
1020 |
|
|
1021 while (ptr) |
|
|
1022 { |
|
|
1023 num_this_chain++; |
|
|
1024 |
|
3933
|
1025 os << " " << ptr->name () << "\n"; |
|
|
1026 |
|
|
1027 ptr->print_info (os, " "); |
|
3013
|
1028 |
|
|
1029 ptr = ptr->next (); |
|
|
1030 } |
|
|
1031 |
|
|
1032 count += num_this_chain; |
|
|
1033 |
|
|
1034 if (num_this_chain > max_chain_length) |
|
|
1035 max_chain_length = num_this_chain; |
|
|
1036 |
|
|
1037 if (num_this_chain < min_chain_length) |
|
|
1038 min_chain_length = num_this_chain; |
|
|
1039 |
|
|
1040 if (num_this_chain > 0) |
|
3933
|
1041 os << "\n"; |
|
3013
|
1042 } |
|
|
1043 |
|
3933
|
1044 os << "max chain length: " << max_chain_length << "\n"; |
|
|
1045 os << "min chain length: " << min_chain_length << "\n"; |
|
|
1046 os << "empty chains: " << empty_chains << "\n"; |
|
|
1047 os << "total chains: " << table_size << "\n"; |
|
|
1048 os << "total symbols: " << count << "\n"; |
|
3013
|
1049 } |
|
|
1050 |
|
1
|
1051 // Chris Torek's fave hash function. |
|
|
1052 |
|
|
1053 unsigned int |
|
3523
|
1054 symbol_table::hash (const std::string& str) |
|
1
|
1055 { |
|
2893
|
1056 unsigned int h = 0; |
|
3013
|
1057 |
|
2893
|
1058 for (unsigned int i = 0; i < str.length (); i++) |
|
1755
|
1059 h = h * 33 + str[i]; |
|
1
|
1060 |
|
3013
|
1061 return h & (table_size - 1); |
|
2790
|
1062 } |
|
|
1063 |
|
3308
|
1064 |
|
|
1065 static int |
|
|
1066 variables_can_hide_functions (void) |
|
|
1067 { |
|
|
1068 Vvariables_can_hide_functions |
|
|
1069 = check_preference ("variables_can_hide_functions"); |
|
|
1070 |
|
|
1071 return 0; |
|
|
1072 } |
|
|
1073 |
|
|
1074 void |
|
|
1075 symbols_of_symtab (void) |
|
|
1076 { |
|
|
1077 DEFVAR (variables_can_hide_functions, 1.0, variables_can_hide_functions, |
|
3448
|
1078 "-*- texinfo -*-\n\ |
|
|
1079 @defvr variables_can_hide_functions\n\ |
|
|
1080 If the value of this variable is nonzero, assignments to variables may\n\ |
|
|
1081 hide previously defined functions of the same name. A negative value\n\ |
|
|
1082 will cause Octave to print a warning, but allow the operation.\n\ |
|
|
1083 @end defvr"); |
|
|
1084 |
|
3308
|
1085 } |
|
|
1086 |
|
|
1087 |
|
1
|
1088 /* |
|
|
1089 ;;; Local Variables: *** |
|
|
1090 ;;; mode: C++ *** |
|
|
1091 ;;; End: *** |
|
|
1092 */ |
