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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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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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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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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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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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141 { |
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3523
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142 std::string retval; |
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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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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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3258
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205 if (is_function () || is_constant ()) |
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206 { |
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207 if (Vvariables_can_hide_functions) |
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208 { |
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209 push_def (new symbol_def ()); |
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210 |
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211 if (Vvariables_can_hide_functions < 0) |
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212 warning ("variable `%s' hides function", nm.c_str ()); |
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213 } |
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214 else |
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215 error ("variable `%s' hides function", nm.c_str ()); |
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216 } |
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195
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217 |
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3013
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218 if (definition->type () == symbol_record::BUILTIN_VARIABLE) |
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219 sym_type = symbol_record::BUILTIN_VARIABLE; |
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220 |
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221 definition->define (v, sym_type); |
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195
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222 } |
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223 } |
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224 |
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225 void |
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226 symbol_record::define_builtin_var (const octave_value& v) |
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195
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227 { |
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228 define (v, symbol_record::BUILTIN_VARIABLE); |
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195
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229 |
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3013
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230 if (chg_fcn) |
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231 chg_fcn (); |
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1
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232 } |
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233 |
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234 bool |
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3258
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235 symbol_record::define_builtin_const (const octave_value& v) |
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236 { |
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3013
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237 bool retval = false; |
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238 |
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3258
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239 if (! read_only_error ("redefine")) |
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195
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240 { |
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3811
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241 definition->define (v, symbol_record::BUILTIN_CONSTANT); |
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2893
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242 |
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3013
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243 retval = true; |
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244 } |
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245 |
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2893
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246 return retval; |
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2390
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247 } |
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248 |
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3013
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249 bool |
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250 symbol_record::define (octave_function *f, unsigned int sym_type) |
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251 { |
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3013
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252 bool retval = false; |
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253 |
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3013
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254 if (! read_only_error ("redefine")) |
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255 { |
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256 octave_value tmp (f); |
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257 |
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258 replace_all_defs (new symbol_def (tmp, sym_type)); |
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259 |
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260 retval = true; |
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261 } |
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2949
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262 |
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263 return retval; |
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1
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264 } |
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265 |
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266 void |
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195
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267 symbol_record::clear (void) |
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268 { |
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195
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269 if (linked_to_global) |
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270 { |
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3013
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271 if (--definition->count <= 0) |
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272 delete definition; |
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273 |
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274 definition = new symbol_def (); |
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275 |
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195
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276 linked_to_global = 0; |
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277 } |
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2846
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278 else if (! tagged_static) |
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195
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279 { |
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3013
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280 remove_top_def (); |
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281 |
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282 if (! definition) |
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283 definition = new symbol_def (); |
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195
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284 } |
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1
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285 } |
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286 |
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287 void |
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3013
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288 symbol_record::alias (symbol_record *s, bool /* force */) |
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1
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289 { |
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3013
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290 chg_fcn = s->chg_fcn; |
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195
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291 |
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3013
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292 replace_all_defs (s->definition); |
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293 |
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294 definition->count++; |
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1
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295 } |
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296 |
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297 void |
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298 symbol_record::mark_as_formal_parameter (void) |
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299 { |
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3013
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300 if (is_linked_to_global ()) |
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301 error ("can't mark global variable `%s' as function parameter", |
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302 nm.c_str ()); |
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303 else if (is_static ()) |
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304 error ("can't mark static variable `%s' as function paraemter", |
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305 nm.c_str ()); |
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306 else |
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307 formal_param = 1; |
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1
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308 } |
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309 |
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310 void |
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195
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311 symbol_record::mark_as_linked_to_global (void) |
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122
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312 { |
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2975
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313 if (is_formal_parameter ()) |
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314 error ("can't make function parameter `%s' global", nm.c_str ()); |
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315 else if (is_static ()) |
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316 error ("can't make static variable `%s' global", nm.c_str ()); |
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317 else |
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318 linked_to_global = 1; |
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122
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319 } |
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320 |
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2846
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321 void |
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322 symbol_record::mark_as_static (void) |
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323 { |
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324 if (is_linked_to_global ()) |
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2975
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325 error ("can't make global variable `%s' static", nm.c_str ()); |
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2846
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326 else if (is_formal_parameter ()) |
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2975
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327 error ("can't make formal parameter `%s' static", nm.c_str ()); |
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2846
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328 else |
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329 tagged_static = 1; |
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330 } |
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331 |
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2856
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332 bool |
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3013
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333 symbol_record::hides_fcn (void) const |
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2846
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334 { |
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3013
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335 bool retval = false; |
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336 |
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337 if (is_variable () && is_defined ()) |
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338 { |
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339 symbol_def *hidden_def = definition->next_elem; |
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340 |
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3325
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341 if (hidden_def && hidden_def->is_user_function ()) |
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3013
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342 retval = true; |
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343 } |
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344 |
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345 return retval; |
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346 } |
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347 |
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348 bool |
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349 symbol_record::hides_builtin (void) const |
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350 { |
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351 bool retval = false; |
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352 |
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353 if (is_variable () && is_defined ()) |
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354 { |
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355 symbol_def *hidden_def = definition->next_elem; |
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356 |
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3325
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357 if (hidden_def && hidden_def->is_builtin_function ()) |
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3013
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358 retval = true; |
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359 } |
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360 |
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361 return retval; |
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2846
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362 } |
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363 |
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2975
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364 octave_value& |
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365 symbol_record::variable_value (void) |
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2390
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366 { |
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2975
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367 static octave_value foo; |
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2390
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368 |
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2975
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369 return is_variable () ? def () : foo; |
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2390
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370 } |
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371 |
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3258
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372 inline void |
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373 symbol_record::link_to_builtin_variable (void) |
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374 { |
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375 symbol_record *tmp_sym = global_sym_tab->lookup (name ()); |
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376 |
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377 if (tmp_sym && tmp_sym->is_builtin_variable ()) |
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378 alias (tmp_sym); |
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379 } |
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380 |
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381 |
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2979
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382 octave_lvalue |
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2390
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383 symbol_record::variable_reference (void) |
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384 { |
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3308
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385 if (Vvariables_can_hide_functions <= 0 |
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386 && (is_function () |
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387 || (! is_defined () && is_valid_function (nm)))) |
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388 { |
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389 if (Vvariables_can_hide_functions < 0) |
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390 warning ("variable `%s' hides function", nm.c_str ()); |
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391 else |
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392 { |
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393 error ("variable `%s' hides function", nm.c_str ()); |
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394 return octave_lvalue (); |
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395 } |
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396 } |
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397 |
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3258
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398 if (is_function () || is_constant ()) |
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2390
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399 clear (); |
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400 |
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401 if (! is_defined ()) |
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402 { |
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403 if (! (is_formal_parameter () || is_linked_to_global ())) |
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3258
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404 link_to_builtin_variable (); |
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2390
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405 |
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406 if (! is_defined ()) |
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2975
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407 { |
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408 octave_value tmp; |
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409 define (tmp); |
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410 } |
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2390
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411 } |
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412 |
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3013
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413 return octave_lvalue (&(def ()), chg_fcn); |
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195
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414 } |
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415 |
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220
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416 void |
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417 symbol_record::push_context (void) |
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418 { |
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2846
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419 if (! is_static ()) |
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420 { |
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421 context.push (definition); |
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3013
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422 |
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423 definition = new symbol_def (); |
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395
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424 |
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2893
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425 global_link_context.push (static_cast<unsigned int> (linked_to_global)); |
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3013
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426 |
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2846
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427 linked_to_global = 0; |
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428 } |
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220
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429 } |
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430 |
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431 void |
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432 symbol_record::pop_context (void) |
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433 { |
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1653
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434 // It is possible for context to be empty if new symbols have been |
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435 // inserted in the symbol table during recursive calls. This can |
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436 // happen as a result of calls to eval() and feval(). |
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220
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437 |
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1653
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438 if (! context.empty ()) |
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220
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439 { |
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3013
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440 replace_all_defs (context.pop ()); |
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1653
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441 |
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442 linked_to_global = global_link_context.pop (); |
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220
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443 } |
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444 } |
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445 |
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3013
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446 void |
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3933
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447 symbol_record::print_symbol_info_line (std::ostream& os) const |
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3013
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448 { |
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449 os << (is_read_only () ? " r-" : " rw") |
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450 << (is_eternal () ? "-" : "d") |
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451 #if 0 |
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452 << (hides_fcn () ? "f" : (hides_builtin () ? "F" : "-")) |
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453 #endif |
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454 << " " |
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3548
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455 << std::setiosflags (std::ios::left) << std::setw (24) |
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456 << type_name () . c_str (); |
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3013
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457 |
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3548
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458 os << std::resetiosflags (std::ios::left); |
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3013
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459 |
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460 int nr = rows (); |
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461 int nc = columns (); |
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462 |
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463 if (nr < 0) |
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464 os << " -"; |
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465 else |
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3548
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466 os << std::setiosflags (std::ios::right) << std::setw (7) << nr; |
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3013
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467 |
|
|
468 if (nc < 0) |
|
|
469 os << " -"; |
|
|
470 else |
|
3548
|
471 os << std::setiosflags (std::ios::right) << std::setw (7) << nc; |
|
3013
|
472 |
|
3548
|
473 os << std::resetiosflags (std::ios::right); |
|
3013
|
474 |
|
|
475 os << " " << name () << "\n"; |
|
|
476 } |
|
|
477 |
|
3239
|
478 void |
|
3944
|
479 symbol_record::print_info (std::ostream& os, const std::string& prefix) const |
|
3239
|
480 { |
|
|
481 if (definition) |
|
3933
|
482 definition->print_info (os, prefix); |
|
3239
|
483 else |
|
3933
|
484 os << prefix << "symbol " << name () << " is undefined\n"; |
|
3239
|
485 } |
|
|
486 |
|
3013
|
487 bool |
|
2791
|
488 symbol_record::read_only_error (const char *action) |
|
195
|
489 { |
|
|
490 if (is_read_only ()) |
|
|
491 { |
|
3258
|
492 if (is_variable () || is_constant ()) |
|
3013
|
493 ::error ("can't %s read-only constant `%s'", action, nm.c_str ()); |
|
195
|
494 else if (is_function ()) |
|
3013
|
495 ::error ("can't %s read-only function `%s'", action, nm.c_str ()); |
|
1045
|
496 else |
|
3013
|
497 ::error ("can't %s read-only symbol `%s'", action, nm.c_str ()); |
|
195
|
498 |
|
3013
|
499 return true; |
|
195
|
500 } |
|
|
501 else |
|
3013
|
502 return false; |
|
195
|
503 } |
|
|
504 |
|
|
505 void |
|
|
506 symbol_record::push_def (symbol_def *sd) |
|
|
507 { |
|
530
|
508 if (! sd) |
|
195
|
509 return; |
|
|
510 |
|
3013
|
511 assert (definition == 0 || definition->next_elem == 0); |
|
|
512 |
|
195
|
513 sd->next_elem = definition; |
|
3013
|
514 |
|
195
|
515 definition = sd; |
|
|
516 } |
|
|
517 |
|
3013
|
518 void |
|
|
519 symbol_record::remove_top_def (void) |
|
195
|
520 { |
|
|
521 symbol_def *top = definition; |
|
|
522 |
|
3013
|
523 definition = definition->next_elem; |
|
2404
|
524 |
|
3013
|
525 if (--top->count <= 0) |
|
|
526 delete top; |
|
195
|
527 } |
|
|
528 |
|
3013
|
529 void |
|
|
530 symbol_record::replace_all_defs (symbol_def *sd) |
|
195
|
531 { |
|
3013
|
532 while (definition) |
|
|
533 remove_top_def (); |
|
2404
|
534 |
|
3325
|
535 if (! sd) |
|
|
536 sd = new symbol_def (); |
|
|
537 |
|
3013
|
538 push_def (sd); |
|
195
|
539 } |
|
|
540 |
|
767
|
541 // A symbol table. |
|
1
|
542 |
|
|
543 symbol_record * |
|
3523
|
544 symbol_table::lookup (const std::string& nm, bool insert, bool warn) |
|
1
|
545 { |
|
3013
|
546 unsigned int index = hash (nm); |
|
1
|
547 |
|
|
548 symbol_record *ptr = table[index].next (); |
|
|
549 |
|
530
|
550 while (ptr) |
|
1
|
551 { |
|
1755
|
552 if (ptr->name () == nm) |
|
1
|
553 return ptr; |
|
3013
|
554 |
|
1
|
555 ptr = ptr->next (); |
|
|
556 } |
|
|
557 |
|
|
558 if (insert) |
|
|
559 { |
|
3013
|
560 symbol_record *sr = new symbol_record (nm, table[index].next ()); |
|
|
561 |
|
|
562 table[index].chain (sr); |
|
|
563 |
|
|
564 return sr; |
|
1
|
565 } |
|
|
566 else if (warn) |
|
3356
|
567 warning ("lookup: symbol `%s' not found", nm.c_str ()); |
|
1
|
568 |
|
530
|
569 return 0; |
|
1
|
570 } |
|
|
571 |
|
|
572 void |
|
3523
|
573 symbol_table::rename (const std::string& old_name, const std::string& new_name) |
|
572
|
574 { |
|
3013
|
575 unsigned int index = hash (old_name); |
|
572
|
576 |
|
|
577 symbol_record *prev = &table[index]; |
|
|
578 symbol_record *ptr = prev->next (); |
|
|
579 |
|
|
580 while (ptr) |
|
|
581 { |
|
1755
|
582 if (ptr->name () == old_name) |
|
572
|
583 { |
|
|
584 ptr->rename (new_name); |
|
|
585 |
|
2791
|
586 if (! error_state) |
|
|
587 { |
|
|
588 prev->chain (ptr->next ()); |
|
|
589 |
|
3013
|
590 index = hash (new_name); |
|
3125
|
591 ptr->chain (table[index].next ()); |
|
2791
|
592 table[index].chain (ptr); |
|
|
593 |
|
|
594 return; |
|
|
595 } |
|
|
596 |
|
|
597 break; |
|
572
|
598 } |
|
|
599 |
|
|
600 prev = ptr; |
|
|
601 ptr = ptr->next (); |
|
|
602 } |
|
|
603 |
|
1755
|
604 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
605 new_name.c_str ()); |
|
572
|
606 } |
|
|
607 |
|
|
608 void |
|
2856
|
609 symbol_table::clear (bool clear_user_functions) |
|
1
|
610 { |
|
3013
|
611 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
612 { |
|
169
|
613 symbol_record *ptr = table[i].next (); |
|
1
|
614 |
|
530
|
615 while (ptr) |
|
169
|
616 { |
|
195
|
617 if (ptr->is_user_variable () |
|
3325
|
618 || (clear_user_functions |
|
|
619 && (ptr->is_user_function () || ptr->is_dld_function ()))) |
|
195
|
620 { |
|
|
621 ptr->clear (); |
|
|
622 } |
|
|
623 |
|
169
|
624 ptr = ptr->next (); |
|
1
|
625 } |
|
|
626 } |
|
|
627 } |
|
|
628 |
|
3013
|
629 bool |
|
3523
|
630 symbol_table::clear (const std::string& nm, bool clear_user_functions) |
|
1
|
631 { |
|
3013
|
632 unsigned int index = hash (nm); |
|
1
|
633 |
|
195
|
634 symbol_record *ptr = table[index].next (); |
|
1
|
635 |
|
530
|
636 while (ptr) |
|
1
|
637 { |
|
1755
|
638 if (ptr->name () == nm |
|
195
|
639 && (ptr->is_user_variable () |
|
3325
|
640 || (clear_user_functions |
|
|
641 && (ptr->is_user_function () || ptr->is_dld_function ())))) |
|
1
|
642 { |
|
195
|
643 ptr->clear (); |
|
3013
|
644 return true; |
|
1
|
645 } |
|
195
|
646 ptr = ptr->next (); |
|
1
|
647 } |
|
|
648 |
|
3013
|
649 return false; |
|
1
|
650 } |
|
|
651 |
|
|
652 int |
|
164
|
653 symbol_table::size (void) const |
|
1
|
654 { |
|
|
655 int count = 0; |
|
3013
|
656 |
|
|
657 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
658 { |
|
|
659 symbol_record *ptr = table[i].next (); |
|
3013
|
660 |
|
530
|
661 while (ptr) |
|
1
|
662 { |
|
|
663 count++; |
|
|
664 ptr = ptr->next (); |
|
|
665 } |
|
|
666 } |
|
3013
|
667 |
|
1
|
668 return count; |
|
|
669 } |
|
|
670 |
|
3013
|
671 static bool |
|
3523
|
672 matches_patterns (const std::string& name, const string_vector& pats) |
|
1
|
673 { |
|
3013
|
674 int npats = pats.length (); |
|
1
|
675 |
|
3013
|
676 if (npats == 0) |
|
|
677 return true; |
|
|
678 |
|
|
679 glob_match pattern (pats); |
|
|
680 |
|
|
681 return pattern.match (name); |
|
1
|
682 } |
|
|
683 |
|
3013
|
684 Array<symbol_record *> |
|
3355
|
685 symbol_table::symbol_list (const string_vector& pats, |
|
3013
|
686 unsigned int type, unsigned int scope) const |
|
1
|
687 { |
|
3355
|
688 int count = 0; |
|
3013
|
689 |
|
1
|
690 int n = size (); |
|
3013
|
691 |
|
3355
|
692 Array<symbol_record *> symbols (n); |
|
|
693 |
|
1
|
694 if (n == 0) |
|
3355
|
695 return symbols; |
|
3013
|
696 |
|
|
697 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
698 { |
|
|
699 symbol_record *ptr = table[i].next (); |
|
3013
|
700 |
|
530
|
701 while (ptr) |
|
1
|
702 { |
|
|
703 assert (count < n); |
|
867
|
704 |
|
2893
|
705 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
706 |
|
2893
|
707 unsigned int my_type = ptr->type (); |
|
867
|
708 |
|
3523
|
709 std::string my_name = ptr->name (); |
|
867
|
710 |
|
|
711 if ((type & my_type) && (scope & my_scope) |
|
3013
|
712 && matches_patterns (my_name, pats)) |
|
|
713 symbols(count++) = ptr; |
|
605
|
714 |
|
1
|
715 ptr = ptr->next (); |
|
|
716 } |
|
|
717 } |
|
1755
|
718 |
|
|
719 symbols.resize (count); |
|
1
|
720 |
|
3013
|
721 return symbols; |
|
|
722 } |
|
|
723 |
|
|
724 string_vector |
|
3355
|
725 symbol_table::name_list (const string_vector& pats, bool sort, |
|
3013
|
726 unsigned int type, unsigned int scope) const |
|
|
727 { |
|
3355
|
728 Array<symbol_record *> symbols = symbol_list (pats, type, scope); |
|
3013
|
729 |
|
|
730 string_vector names; |
|
|
731 |
|
|
732 int n = symbols.length (); |
|
|
733 |
|
|
734 if (n > 0) |
|
|
735 { |
|
|
736 names.resize (n); |
|
|
737 |
|
|
738 for (int i = 0; i < n; i++) |
|
|
739 names[i] = symbols(i)->name (); |
|
|
740 } |
|
|
741 |
|
|
742 if (sort) |
|
|
743 names.qsort (); |
|
|
744 |
|
|
745 return names; |
|
|
746 } |
|
|
747 |
|
|
748 static int |
|
3145
|
749 maybe_list_cmp_fcn (const void *a_arg, const void *b_arg) |
|
3013
|
750 { |
|
3145
|
751 const symbol_record *a = *(X_CAST (const symbol_record **, a_arg)); |
|
|
752 const symbol_record *b = *(X_CAST (const symbol_record **, b_arg)); |
|
3013
|
753 |
|
3523
|
754 std::string a_nm = a->name (); |
|
|
755 std::string b_nm = b->name (); |
|
3145
|
756 |
|
|
757 return a_nm.compare (b_nm); |
|
3013
|
758 } |
|
1
|
759 |
|
3013
|
760 int |
|
|
761 symbol_table::maybe_list (const char *header, const string_vector& argv, |
|
3523
|
762 std::ostream& os, bool show_verbose, |
|
3013
|
763 unsigned type, unsigned scope) |
|
|
764 { |
|
|
765 int status = 0; |
|
|
766 |
|
|
767 if (show_verbose) |
|
|
768 { |
|
3355
|
769 Array<symbol_record *> symbols = symbol_list (argv, type, scope); |
|
3013
|
770 |
|
|
771 int len = symbols.length (); |
|
|
772 |
|
3355
|
773 if (len > 0) |
|
3013
|
774 { |
|
|
775 os << "\n" << header << "\n\n" |
|
|
776 << "prot type rows cols name\n" |
|
|
777 << "==== ==== ==== ==== ====\n"; |
|
|
778 |
|
|
779 symbols.qsort (maybe_list_cmp_fcn); |
|
|
780 |
|
|
781 for (int i = 0; i < len; i++) |
|
|
782 symbols(i)->print_symbol_info_line (os); |
|
|
783 |
|
|
784 status = 1; |
|
|
785 } |
|
|
786 } |
|
|
787 else |
|
|
788 { |
|
3355
|
789 string_vector symbols = name_list (argv, 1, type, scope); |
|
3013
|
790 |
|
3355
|
791 if (! symbols.empty ()) |
|
3013
|
792 { |
|
|
793 os << "\n" << header << "\n\n"; |
|
|
794 |
|
|
795 symbols.list_in_columns (os); |
|
|
796 |
|
|
797 status = 1; |
|
|
798 } |
|
|
799 } |
|
|
800 |
|
|
801 return status; |
|
1
|
802 } |
|
|
803 |
|
3355
|
804 Array<symbol_record *> |
|
3523
|
805 symbol_table::glob (const std::string& pat, unsigned int type, |
|
2893
|
806 unsigned int scope) const |
|
605
|
807 { |
|
3355
|
808 int count = 0; |
|
|
809 |
|
605
|
810 int n = size (); |
|
3355
|
811 |
|
|
812 Array<symbol_record *> symbols (n); |
|
|
813 |
|
605
|
814 if (n == 0) |
|
3355
|
815 return symbols; |
|
3013
|
816 |
|
|
817 for (unsigned int i = 0; i < table_size; i++) |
|
605
|
818 { |
|
|
819 symbol_record *ptr = table[i].next (); |
|
3013
|
820 |
|
605
|
821 while (ptr) |
|
|
822 { |
|
|
823 assert (count < n); |
|
|
824 |
|
2893
|
825 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
826 |
|
2893
|
827 unsigned int my_type = ptr->type (); |
|
605
|
828 |
|
1792
|
829 glob_match pattern (pat); |
|
1755
|
830 |
|
605
|
831 if ((type & my_type) && (scope & my_scope) |
|
1792
|
832 && pattern.match (ptr->name ())) |
|
605
|
833 { |
|
3355
|
834 symbols(count++) = ptr; |
|
605
|
835 } |
|
|
836 |
|
|
837 ptr = ptr->next (); |
|
|
838 } |
|
|
839 } |
|
3355
|
840 |
|
|
841 symbols.resize (count); |
|
605
|
842 |
|
|
843 return symbols; |
|
|
844 } |
|
|
845 |
|
220
|
846 void |
|
|
847 symbol_table::push_context (void) |
|
|
848 { |
|
3013
|
849 for (unsigned int i = 0; i < table_size; i++) |
|
220
|
850 { |
|
|
851 symbol_record *ptr = table[i].next (); |
|
|
852 |
|
530
|
853 while (ptr) |
|
220
|
854 { |
|
|
855 ptr->push_context (); |
|
|
856 ptr = ptr->next (); |
|
|
857 } |
|
|
858 } |
|
|
859 } |
|
|
860 |
|
|
861 void |
|
|
862 symbol_table::pop_context (void) |
|
|
863 { |
|
3013
|
864 for (unsigned int i = 0; i < table_size; i++) |
|
220
|
865 { |
|
|
866 symbol_record *ptr = table[i].next (); |
|
|
867 |
|
530
|
868 while (ptr) |
|
220
|
869 { |
|
|
870 ptr->pop_context (); |
|
|
871 ptr = ptr->next (); |
|
|
872 } |
|
|
873 } |
|
|
874 } |
|
|
875 |
|
3013
|
876 void |
|
3944
|
877 symbol_table::print_info (std::ostream& os) const |
|
3013
|
878 { |
|
|
879 int count = 0; |
|
|
880 int empty_chains = 0; |
|
|
881 int max_chain_length = 0; |
|
|
882 int min_chain_length = INT_MAX; |
|
|
883 |
|
|
884 for (unsigned int i = 0; i < table_size; i++) |
|
|
885 { |
|
|
886 int num_this_chain = 0; |
|
|
887 |
|
|
888 symbol_record *ptr = table[i].next (); |
|
|
889 |
|
|
890 if (ptr) |
|
3933
|
891 os << "chain number " << i << ":\n"; |
|
3013
|
892 else |
|
|
893 { |
|
|
894 empty_chains++; |
|
|
895 min_chain_length = 0; |
|
|
896 } |
|
|
897 |
|
|
898 while (ptr) |
|
|
899 { |
|
|
900 num_this_chain++; |
|
|
901 |
|
3933
|
902 os << " " << ptr->name () << "\n"; |
|
|
903 |
|
|
904 ptr->print_info (os, " "); |
|
3013
|
905 |
|
|
906 ptr = ptr->next (); |
|
|
907 } |
|
|
908 |
|
|
909 count += num_this_chain; |
|
|
910 |
|
|
911 if (num_this_chain > max_chain_length) |
|
|
912 max_chain_length = num_this_chain; |
|
|
913 |
|
|
914 if (num_this_chain < min_chain_length) |
|
|
915 min_chain_length = num_this_chain; |
|
|
916 |
|
|
917 if (num_this_chain > 0) |
|
3933
|
918 os << "\n"; |
|
3013
|
919 } |
|
|
920 |
|
3933
|
921 os << "max chain length: " << max_chain_length << "\n"; |
|
|
922 os << "min chain length: " << min_chain_length << "\n"; |
|
|
923 os << "empty chains: " << empty_chains << "\n"; |
|
|
924 os << "total chains: " << table_size << "\n"; |
|
|
925 os << "total symbols: " << count << "\n"; |
|
3013
|
926 } |
|
|
927 |
|
1
|
928 // Chris Torek's fave hash function. |
|
|
929 |
|
|
930 unsigned int |
|
3523
|
931 symbol_table::hash (const std::string& str) |
|
1
|
932 { |
|
2893
|
933 unsigned int h = 0; |
|
3013
|
934 |
|
2893
|
935 for (unsigned int i = 0; i < str.length (); i++) |
|
1755
|
936 h = h * 33 + str[i]; |
|
1
|
937 |
|
3013
|
938 return h & (table_size - 1); |
|
2790
|
939 } |
|
|
940 |
|
3308
|
941 |
|
|
942 static int |
|
|
943 variables_can_hide_functions (void) |
|
|
944 { |
|
|
945 Vvariables_can_hide_functions |
|
|
946 = check_preference ("variables_can_hide_functions"); |
|
|
947 |
|
|
948 return 0; |
|
|
949 } |
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|
950 |
|
|
951 void |
|
|
952 symbols_of_symtab (void) |
|
|
953 { |
|
|
954 DEFVAR (variables_can_hide_functions, 1.0, variables_can_hide_functions, |
|
3448
|
955 "-*- texinfo -*-\n\ |
|
|
956 @defvr variables_can_hide_functions\n\ |
|
|
957 If the value of this variable is nonzero, assignments to variables may\n\ |
|
|
958 hide previously defined functions of the same name. A negative value\n\ |
|
|
959 will cause Octave to print a warning, but allow the operation.\n\ |
|
|
960 @end defvr"); |
|
|
961 |
|
3308
|
962 } |
|
|
963 |
|
|
964 |
|
1
|
965 /* |
|
|
966 ;;; Local Variables: *** |
|
|
967 ;;; mode: C++ *** |
|
|
968 ;;; End: *** |
|
|
969 */ |
