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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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35 #include <iomanip.h> |
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36 |
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2926
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37 #include "glob-match.h" |
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1755
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38 #include "str-vec.h" |
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39 |
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3308
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40 #include "defun.h" |
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1352
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41 #include "error.h" |
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2979
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42 #include "oct-lvalue.h" |
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2975
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43 #include "ov.h" |
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3013
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44 #include "pager.h" |
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1755
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45 #include "symtab.h" |
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46 #include "utils.h" |
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1352
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47 #include "variables.h" |
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48 |
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3308
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49 // Should variables be allowed to hide functions of the same name? A |
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50 // positive value means yes. A negative value means yes, but print a |
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51 // warning message. Zero means it should be considered an error. |
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52 static int Vvariables_can_hide_functions; |
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53 |
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3013
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54 octave_allocator |
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55 symbol_record::symbol_def::allocator (sizeof (symbol_record::symbol_def)); |
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195
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56 |
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3355
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57 #define SYMBOL_DEF symbol_record::symbol_def |
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58 |
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59 string |
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60 SYMBOL_DEF::type_as_string (void) const |
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61 { |
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62 string retval = "<unknown type>"; |
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63 |
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64 if (is_user_variable ()) |
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65 retval = "user-defined variable"; |
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66 else if (is_text_function ()) |
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67 retval = "built-in text function"; |
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68 else if (is_mapper_function ()) |
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69 retval = "built-in mapper function"; |
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70 else if (is_user_function ()) |
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71 retval = "user-defined function"; |
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72 else if (is_builtin_constant ()) |
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73 retval = "built-in constant"; |
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74 else if (is_builtin_variable ()) |
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75 retval = "built-in variable"; |
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76 else if (is_builtin_function ()) |
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77 retval = "built-in function"; |
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78 else if (is_dld_function ()) |
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79 retval = "dynamically-linked function"; |
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80 |
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81 return retval; |
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82 } |
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83 |
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84 string |
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85 SYMBOL_DEF::which (const string& name) |
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86 { |
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87 string retval; |
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88 |
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89 if (is_user_function () || is_dld_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 if (defn) |
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94 retval = defn->fcn_file_name (); |
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95 } |
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96 else |
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97 retval = name + " is a " + type_as_string (); |
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98 |
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99 return retval; |
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100 } |
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101 |
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3239
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102 void |
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3355
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103 SYMBOL_DEF::which (ostream& os, const string& name) |
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104 { |
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105 os << name; |
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106 |
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107 if (is_user_function () || is_dld_function ()) |
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108 { |
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109 octave_function *defn = definition.function_value (); |
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110 |
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111 string fn = defn ? defn->fcn_file_name () : string (); |
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112 |
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113 if (! fn.empty ()) |
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114 { |
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115 os << " is the " << type_as_string () << " from the file\n" |
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116 << fn << "\n"; |
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117 |
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118 return; |
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119 } |
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120 } |
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121 |
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122 os << " is a " << type_as_string () << "\n"; |
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123 } |
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124 |
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125 void |
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126 SYMBOL_DEF::dump_symbol_info (void) |
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3239
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127 { |
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128 octave_stdout << "symbol_def::count: " << count << "\n"; |
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129 octave_stdout << "def.type_name(): " << definition.type_name () << "\n"; |
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3240
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130 octave_stdout << "def.count(): " << definition.get_count () << "\n"; |
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3239
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131 } |
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132 |
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767
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133 // Individual records in a symbol table. |
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134 |
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3013
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135 // XXX FIXME XXX -- there are lots of places below where we should |
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136 // probably be temporarily ignoring interrupts. |
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137 |
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572
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138 void |
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1755
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139 symbol_record::rename (const string& new_name) |
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572
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140 { |
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2791
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141 if (! read_only_error ("rename")) |
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142 nm = new_name; |
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572
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143 } |
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144 |
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3013
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145 void |
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146 symbol_record::define (const octave_value& v, unsigned int sym_type) |
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195
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147 { |
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3013
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148 if (! (is_variable () && read_only_error ("redefine"))) |
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149 { |
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3258
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150 if (is_function () || is_constant ()) |
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3308
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151 { |
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152 if (Vvariables_can_hide_functions) |
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153 { |
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154 push_def (new symbol_def ()); |
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155 |
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156 if (Vvariables_can_hide_functions < 0) |
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157 warning ("variable `%s' hides function", nm.c_str ()); |
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158 } |
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159 else |
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160 error ("variable `%s' hides function", nm.c_str ()); |
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161 } |
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195
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162 |
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3013
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163 if (definition->type () == symbol_record::BUILTIN_VARIABLE) |
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164 sym_type = symbol_record::BUILTIN_VARIABLE; |
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165 |
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3013
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166 definition->define (v, sym_type); |
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195
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167 } |
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168 } |
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169 |
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170 void |
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3013
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171 symbol_record::define_builtin_var (const octave_value& v) |
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195
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172 { |
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3013
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173 define (v, symbol_record::BUILTIN_VARIABLE); |
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195
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174 |
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3013
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175 if (chg_fcn) |
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176 chg_fcn (); |
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1
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177 } |
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178 |
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3013
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179 bool |
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3258
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180 symbol_record::define_builtin_const (const octave_value& v) |
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1
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181 { |
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3013
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182 bool retval = false; |
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183 |
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3258
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184 if (! read_only_error ("redefine")) |
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195
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185 { |
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186 replace_all_defs (new symbol_def (v, symbol_record::BUILTIN_CONSTANT)); |
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2893
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187 |
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3013
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188 retval = true; |
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189 } |
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190 |
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2893
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191 return retval; |
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2390
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192 } |
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193 |
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3013
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194 bool |
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195 symbol_record::define (octave_function *f, unsigned int sym_type) |
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1
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196 { |
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3013
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197 bool retval = false; |
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2949
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198 |
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3013
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199 if (! read_only_error ("redefine")) |
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200 { |
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201 octave_value tmp (f); |
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202 |
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203 replace_all_defs (new symbol_def (tmp, sym_type)); |
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204 |
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205 retval = true; |
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206 } |
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2949
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207 |
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208 return retval; |
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1
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209 } |
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210 |
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211 void |
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195
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212 symbol_record::clear (void) |
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213 { |
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195
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214 if (linked_to_global) |
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215 { |
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3013
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216 if (--definition->count <= 0) |
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217 delete definition; |
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218 |
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219 definition = new symbol_def (); |
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220 |
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195
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221 linked_to_global = 0; |
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222 } |
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223 else if (! tagged_static) |
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195
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224 { |
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3013
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225 remove_top_def (); |
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226 |
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227 if (! definition) |
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228 definition = new symbol_def (); |
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195
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229 } |
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230 } |
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231 |
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232 void |
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3013
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233 symbol_record::alias (symbol_record *s, bool /* force */) |
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234 { |
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3013
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235 chg_fcn = s->chg_fcn; |
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195
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236 |
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3013
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237 replace_all_defs (s->definition); |
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238 |
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239 definition->count++; |
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1
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240 } |
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241 |
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242 void |
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243 symbol_record::mark_as_formal_parameter (void) |
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244 { |
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3013
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245 if (is_linked_to_global ()) |
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246 error ("can't mark global variable `%s' as function parameter", |
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247 nm.c_str ()); |
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248 else if (is_static ()) |
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249 error ("can't mark static variable `%s' as function paraemter", |
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250 nm.c_str ()); |
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251 else |
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252 formal_param = 1; |
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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::mark_as_linked_to_global (void) |
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122
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257 { |
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2975
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258 if (is_formal_parameter ()) |
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259 error ("can't make function parameter `%s' global", nm.c_str ()); |
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260 else if (is_static ()) |
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261 error ("can't make static variable `%s' global", nm.c_str ()); |
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262 else |
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263 linked_to_global = 1; |
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122
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264 } |
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265 |
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2846
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266 void |
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267 symbol_record::mark_as_static (void) |
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268 { |
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269 if (is_linked_to_global ()) |
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270 error ("can't make global variable `%s' static", nm.c_str ()); |
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2846
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271 else if (is_formal_parameter ()) |
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272 error ("can't make formal parameter `%s' static", nm.c_str ()); |
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2846
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273 else |
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274 tagged_static = 1; |
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275 } |
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276 |
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2856
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277 bool |
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3013
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278 symbol_record::hides_fcn (void) const |
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2846
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279 { |
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3013
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280 bool retval = false; |
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281 |
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282 if (is_variable () && is_defined ()) |
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283 { |
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284 symbol_def *hidden_def = definition->next_elem; |
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285 |
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3325
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286 if (hidden_def && hidden_def->is_user_function ()) |
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3013
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287 retval = true; |
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288 } |
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289 |
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290 return retval; |
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291 } |
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292 |
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293 bool |
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294 symbol_record::hides_builtin (void) const |
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295 { |
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296 bool retval = false; |
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297 |
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298 if (is_variable () && is_defined ()) |
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299 { |
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300 symbol_def *hidden_def = definition->next_elem; |
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301 |
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3325
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302 if (hidden_def && hidden_def->is_builtin_function ()) |
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3013
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303 retval = true; |
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304 } |
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305 |
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306 return retval; |
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2846
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307 } |
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308 |
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2975
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309 octave_value& |
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310 symbol_record::variable_value (void) |
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2390
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311 { |
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2975
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312 static octave_value foo; |
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2390
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313 |
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2975
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314 return is_variable () ? def () : foo; |
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2390
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315 } |
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316 |
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3258
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317 inline void |
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318 symbol_record::link_to_builtin_variable (void) |
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319 { |
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320 symbol_record *tmp_sym = global_sym_tab->lookup (name ()); |
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321 |
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322 if (tmp_sym && tmp_sym->is_builtin_variable ()) |
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323 alias (tmp_sym); |
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324 } |
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325 |
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326 |
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2979
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327 octave_lvalue |
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2390
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328 symbol_record::variable_reference (void) |
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329 { |
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3308
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330 if (Vvariables_can_hide_functions <= 0 |
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331 && (is_function () |
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332 || (! is_defined () && is_valid_function (nm)))) |
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333 { |
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334 if (Vvariables_can_hide_functions < 0) |
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335 warning ("variable `%s' hides function", nm.c_str ()); |
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336 else |
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337 { |
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338 error ("variable `%s' hides function", nm.c_str ()); |
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339 return octave_lvalue (); |
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340 } |
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341 } |
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342 |
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3258
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343 if (is_function () || is_constant ()) |
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2390
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344 clear (); |
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345 |
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346 if (! is_defined ()) |
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347 { |
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348 if (! (is_formal_parameter () || is_linked_to_global ())) |
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3258
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349 link_to_builtin_variable (); |
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2390
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350 |
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351 if (! is_defined ()) |
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2975
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352 { |
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353 octave_value tmp; |
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354 define (tmp); |
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355 } |
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2390
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356 } |
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357 |
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3013
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358 return octave_lvalue (&(def ()), chg_fcn); |
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195
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359 } |
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360 |
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220
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361 void |
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362 symbol_record::push_context (void) |
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363 { |
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2846
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364 if (! is_static ()) |
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365 { |
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366 context.push (definition); |
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3013
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367 |
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368 definition = new symbol_def (); |
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395
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369 |
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2893
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370 global_link_context.push (static_cast<unsigned int> (linked_to_global)); |
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3013
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371 |
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2846
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372 linked_to_global = 0; |
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373 } |
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220
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374 } |
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375 |
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376 void |
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377 symbol_record::pop_context (void) |
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378 { |
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1653
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379 // It is possible for context to be empty if new symbols have been |
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380 // inserted in the symbol table during recursive calls. This can |
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381 // happen as a result of calls to eval() and feval(). |
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220
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382 |
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1653
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383 if (! context.empty ()) |
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220
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384 { |
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3013
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385 replace_all_defs (context.pop ()); |
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1653
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386 |
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387 linked_to_global = global_link_context.pop (); |
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220
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388 } |
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389 } |
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390 |
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3013
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391 void |
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392 symbol_record::print_symbol_info_line (ostream& os) |
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393 { |
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394 os << (is_read_only () ? " r-" : " rw") |
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395 << (is_eternal () ? "-" : "d") |
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396 #if 0 |
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397 << (hides_fcn () ? "f" : (hides_builtin () ? "F" : "-")) |
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398 #endif |
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399 << " " |
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400 << setiosflags (ios::left) << setw (24) << type_name () . c_str (); |
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401 |
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402 os << resetiosflags (ios::left); |
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403 |
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404 int nr = rows (); |
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405 int nc = columns (); |
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406 |
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407 if (nr < 0) |
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408 os << " -"; |
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409 else |
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410 os << setiosflags (ios::right) << setw (7) << nr; |
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411 |
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412 if (nc < 0) |
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413 os << " -"; |
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414 else |
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415 os << setiosflags (ios::right) << setw (7) << nc; |
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416 |
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417 os << resetiosflags (ios::right); |
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418 |
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419 os << " " << name () << "\n"; |
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420 } |
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421 |
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3239
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422 void |
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423 symbol_record::dump_symbol_info (void) |
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424 { |
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425 if (definition) |
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426 definition->dump_symbol_info (); |
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427 else |
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428 octave_stdout << "symbol " << name () << " is undefined\n"; |
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429 } |
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430 |
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3013
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431 bool |
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2791
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432 symbol_record::read_only_error (const char *action) |
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195
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433 { |
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434 if (is_read_only ()) |
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435 { |
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3258
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436 if (is_variable () || is_constant ()) |
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3013
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437 ::error ("can't %s read-only constant `%s'", action, nm.c_str ()); |
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195
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438 else if (is_function ()) |
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3013
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439 ::error ("can't %s read-only function `%s'", action, nm.c_str ()); |
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1045
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440 else |
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3013
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441 ::error ("can't %s read-only symbol `%s'", action, nm.c_str ()); |
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195
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442 |
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3013
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443 return true; |
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195
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444 } |
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445 else |
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3013
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446 return false; |
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195
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447 } |
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448 |
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449 void |
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450 symbol_record::push_def (symbol_def *sd) |
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451 { |
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530
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452 if (! sd) |
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195
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453 return; |
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454 |
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3013
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455 assert (definition == 0 || definition->next_elem == 0); |
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456 |
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195
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457 sd->next_elem = definition; |
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3013
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458 |
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195
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459 definition = sd; |
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460 } |
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461 |
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3013
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462 void |
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463 symbol_record::remove_top_def (void) |
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195
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464 { |
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465 symbol_def *top = definition; |
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466 |
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3013
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467 definition = definition->next_elem; |
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2404
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468 |
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3013
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469 if (--top->count <= 0) |
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470 delete top; |
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195
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471 } |
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472 |
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3013
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473 void |
|
|
474 symbol_record::replace_all_defs (symbol_def *sd) |
|
195
|
475 { |
|
3013
|
476 while (definition) |
|
|
477 remove_top_def (); |
|
2404
|
478 |
|
3325
|
479 if (! sd) |
|
|
480 sd = new symbol_def (); |
|
|
481 |
|
3013
|
482 push_def (sd); |
|
195
|
483 } |
|
|
484 |
|
767
|
485 // A symbol table. |
|
1
|
486 |
|
|
487 symbol_record * |
|
2856
|
488 symbol_table::lookup (const string& nm, bool insert, bool warn) |
|
1
|
489 { |
|
3013
|
490 unsigned int index = hash (nm); |
|
1
|
491 |
|
|
492 symbol_record *ptr = table[index].next (); |
|
|
493 |
|
530
|
494 while (ptr) |
|
1
|
495 { |
|
1755
|
496 if (ptr->name () == nm) |
|
1
|
497 return ptr; |
|
3013
|
498 |
|
1
|
499 ptr = ptr->next (); |
|
|
500 } |
|
|
501 |
|
|
502 if (insert) |
|
|
503 { |
|
3013
|
504 symbol_record *sr = new symbol_record (nm, table[index].next ()); |
|
|
505 |
|
|
506 table[index].chain (sr); |
|
|
507 |
|
|
508 return sr; |
|
1
|
509 } |
|
|
510 else if (warn) |
|
1755
|
511 warning ("lookup: symbol`%s' not found", nm.c_str ()); |
|
1
|
512 |
|
530
|
513 return 0; |
|
1
|
514 } |
|
|
515 |
|
|
516 void |
|
1755
|
517 symbol_table::rename (const string& old_name, const string& new_name) |
|
572
|
518 { |
|
3013
|
519 unsigned int index = hash (old_name); |
|
572
|
520 |
|
|
521 symbol_record *prev = &table[index]; |
|
|
522 symbol_record *ptr = prev->next (); |
|
|
523 |
|
|
524 while (ptr) |
|
|
525 { |
|
1755
|
526 if (ptr->name () == old_name) |
|
572
|
527 { |
|
|
528 ptr->rename (new_name); |
|
|
529 |
|
2791
|
530 if (! error_state) |
|
|
531 { |
|
|
532 prev->chain (ptr->next ()); |
|
|
533 |
|
3013
|
534 index = hash (new_name); |
|
3125
|
535 ptr->chain (table[index].next ()); |
|
2791
|
536 table[index].chain (ptr); |
|
|
537 |
|
|
538 return; |
|
|
539 } |
|
|
540 |
|
|
541 break; |
|
572
|
542 } |
|
|
543 |
|
|
544 prev = ptr; |
|
|
545 ptr = ptr->next (); |
|
|
546 } |
|
|
547 |
|
1755
|
548 error ("unable to rename `%s' to `%s'", old_name.c_str (), |
|
|
549 new_name.c_str ()); |
|
572
|
550 } |
|
|
551 |
|
|
552 void |
|
2856
|
553 symbol_table::clear (bool clear_user_functions) |
|
1
|
554 { |
|
3013
|
555 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
556 { |
|
169
|
557 symbol_record *ptr = table[i].next (); |
|
1
|
558 |
|
530
|
559 while (ptr) |
|
169
|
560 { |
|
195
|
561 if (ptr->is_user_variable () |
|
3325
|
562 || (clear_user_functions |
|
|
563 && (ptr->is_user_function () || ptr->is_dld_function ()))) |
|
195
|
564 { |
|
|
565 ptr->clear (); |
|
|
566 } |
|
|
567 |
|
169
|
568 ptr = ptr->next (); |
|
1
|
569 } |
|
|
570 } |
|
|
571 } |
|
|
572 |
|
3013
|
573 bool |
|
2856
|
574 symbol_table::clear (const string& nm, bool clear_user_functions) |
|
1
|
575 { |
|
3013
|
576 unsigned int index = hash (nm); |
|
1
|
577 |
|
195
|
578 symbol_record *ptr = table[index].next (); |
|
1
|
579 |
|
530
|
580 while (ptr) |
|
1
|
581 { |
|
1755
|
582 if (ptr->name () == nm |
|
195
|
583 && (ptr->is_user_variable () |
|
3325
|
584 || (clear_user_functions |
|
|
585 && (ptr->is_user_function () || ptr->is_dld_function ())))) |
|
1
|
586 { |
|
195
|
587 ptr->clear (); |
|
3013
|
588 return true; |
|
1
|
589 } |
|
195
|
590 ptr = ptr->next (); |
|
1
|
591 } |
|
|
592 |
|
3013
|
593 return false; |
|
1
|
594 } |
|
|
595 |
|
|
596 int |
|
164
|
597 symbol_table::size (void) const |
|
1
|
598 { |
|
|
599 int count = 0; |
|
3013
|
600 |
|
|
601 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
602 { |
|
|
603 symbol_record *ptr = table[i].next (); |
|
3013
|
604 |
|
530
|
605 while (ptr) |
|
1
|
606 { |
|
|
607 count++; |
|
|
608 ptr = ptr->next (); |
|
|
609 } |
|
|
610 } |
|
3013
|
611 |
|
1
|
612 return count; |
|
|
613 } |
|
|
614 |
|
3013
|
615 static bool |
|
|
616 matches_patterns (const string& name, const string_vector& pats) |
|
1
|
617 { |
|
3013
|
618 int npats = pats.length (); |
|
1
|
619 |
|
3013
|
620 if (npats == 0) |
|
|
621 return true; |
|
|
622 |
|
|
623 glob_match pattern (pats); |
|
|
624 |
|
|
625 return pattern.match (name); |
|
1
|
626 } |
|
|
627 |
|
3013
|
628 Array<symbol_record *> |
|
3355
|
629 symbol_table::symbol_list (const string_vector& pats, |
|
3013
|
630 unsigned int type, unsigned int scope) const |
|
1
|
631 { |
|
3355
|
632 int count = 0; |
|
3013
|
633 |
|
1
|
634 int n = size (); |
|
3013
|
635 |
|
3355
|
636 Array<symbol_record *> symbols (n); |
|
|
637 |
|
1
|
638 if (n == 0) |
|
3355
|
639 return symbols; |
|
3013
|
640 |
|
|
641 for (unsigned int i = 0; i < table_size; i++) |
|
1
|
642 { |
|
|
643 symbol_record *ptr = table[i].next (); |
|
3013
|
644 |
|
530
|
645 while (ptr) |
|
1
|
646 { |
|
|
647 assert (count < n); |
|
867
|
648 |
|
2893
|
649 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
867
|
650 |
|
2893
|
651 unsigned int my_type = ptr->type (); |
|
867
|
652 |
|
1755
|
653 string my_name = ptr->name (); |
|
867
|
654 |
|
|
655 if ((type & my_type) && (scope & my_scope) |
|
3013
|
656 && matches_patterns (my_name, pats)) |
|
|
657 symbols(count++) = ptr; |
|
605
|
658 |
|
1
|
659 ptr = ptr->next (); |
|
|
660 } |
|
|
661 } |
|
1755
|
662 |
|
|
663 symbols.resize (count); |
|
1
|
664 |
|
3013
|
665 return symbols; |
|
|
666 } |
|
|
667 |
|
|
668 string_vector |
|
3355
|
669 symbol_table::name_list (const string_vector& pats, bool sort, |
|
3013
|
670 unsigned int type, unsigned int scope) const |
|
|
671 { |
|
3355
|
672 Array<symbol_record *> symbols = symbol_list (pats, type, scope); |
|
3013
|
673 |
|
|
674 string_vector names; |
|
|
675 |
|
|
676 int n = symbols.length (); |
|
|
677 |
|
|
678 if (n > 0) |
|
|
679 { |
|
|
680 names.resize (n); |
|
|
681 |
|
|
682 for (int i = 0; i < n; i++) |
|
|
683 names[i] = symbols(i)->name (); |
|
|
684 } |
|
|
685 |
|
|
686 if (sort) |
|
|
687 names.qsort (); |
|
|
688 |
|
|
689 return names; |
|
|
690 } |
|
|
691 |
|
|
692 static int |
|
3145
|
693 maybe_list_cmp_fcn (const void *a_arg, const void *b_arg) |
|
3013
|
694 { |
|
3145
|
695 const symbol_record *a = *(X_CAST (const symbol_record **, a_arg)); |
|
|
696 const symbol_record *b = *(X_CAST (const symbol_record **, b_arg)); |
|
3013
|
697 |
|
3145
|
698 string a_nm = a->name (); |
|
|
699 string b_nm = b->name (); |
|
|
700 |
|
|
701 return a_nm.compare (b_nm); |
|
3013
|
702 } |
|
1
|
703 |
|
3013
|
704 int |
|
|
705 symbol_table::maybe_list (const char *header, const string_vector& argv, |
|
|
706 ostream& os, bool show_verbose, |
|
|
707 unsigned type, unsigned scope) |
|
|
708 { |
|
|
709 int status = 0; |
|
|
710 |
|
|
711 if (show_verbose) |
|
|
712 { |
|
3355
|
713 Array<symbol_record *> symbols = symbol_list (argv, type, scope); |
|
3013
|
714 |
|
|
715 int len = symbols.length (); |
|
|
716 |
|
3355
|
717 if (len > 0) |
|
3013
|
718 { |
|
|
719 os << "\n" << header << "\n\n" |
|
|
720 << "prot type rows cols name\n" |
|
|
721 << "==== ==== ==== ==== ====\n"; |
|
|
722 |
|
|
723 symbols.qsort (maybe_list_cmp_fcn); |
|
|
724 |
|
|
725 for (int i = 0; i < len; i++) |
|
|
726 symbols(i)->print_symbol_info_line (os); |
|
|
727 |
|
|
728 status = 1; |
|
|
729 } |
|
|
730 } |
|
|
731 else |
|
|
732 { |
|
3355
|
733 string_vector symbols = name_list (argv, 1, type, scope); |
|
3013
|
734 |
|
3355
|
735 if (! symbols.empty ()) |
|
3013
|
736 { |
|
|
737 os << "\n" << header << "\n\n"; |
|
|
738 |
|
|
739 symbols.list_in_columns (os); |
|
|
740 |
|
|
741 status = 1; |
|
|
742 } |
|
|
743 } |
|
|
744 |
|
|
745 return status; |
|
1
|
746 } |
|
|
747 |
|
3355
|
748 Array<symbol_record *> |
|
|
749 symbol_table::glob (const string& pat, unsigned int type, |
|
2893
|
750 unsigned int scope) const |
|
605
|
751 { |
|
3355
|
752 int count = 0; |
|
|
753 |
|
605
|
754 int n = size (); |
|
3355
|
755 |
|
|
756 Array<symbol_record *> symbols (n); |
|
|
757 |
|
605
|
758 if (n == 0) |
|
3355
|
759 return symbols; |
|
3013
|
760 |
|
|
761 for (unsigned int i = 0; i < table_size; i++) |
|
605
|
762 { |
|
|
763 symbol_record *ptr = table[i].next (); |
|
3013
|
764 |
|
605
|
765 while (ptr) |
|
|
766 { |
|
|
767 assert (count < n); |
|
|
768 |
|
2893
|
769 unsigned int my_scope = ptr->is_linked_to_global () + 1; // Tricky... |
|
605
|
770 |
|
2893
|
771 unsigned int my_type = ptr->type (); |
|
605
|
772 |
|
1792
|
773 glob_match pattern (pat); |
|
1755
|
774 |
|
605
|
775 if ((type & my_type) && (scope & my_scope) |
|
1792
|
776 && pattern.match (ptr->name ())) |
|
605
|
777 { |
|
3355
|
778 symbols(count++) = ptr; |
|
605
|
779 } |
|
|
780 |
|
|
781 ptr = ptr->next (); |
|
|
782 } |
|
|
783 } |
|
3355
|
784 |
|
|
785 symbols.resize (count); |
|
605
|
786 |
|
|
787 return symbols; |
|
|
788 } |
|
|
789 |
|
220
|
790 void |
|
|
791 symbol_table::push_context (void) |
|
|
792 { |
|
3013
|
793 for (unsigned int i = 0; i < table_size; i++) |
|
220
|
794 { |
|
|
795 symbol_record *ptr = table[i].next (); |
|
|
796 |
|
530
|
797 while (ptr) |
|
220
|
798 { |
|
|
799 ptr->push_context (); |
|
|
800 ptr = ptr->next (); |
|
|
801 } |
|
|
802 } |
|
|
803 } |
|
|
804 |
|
|
805 void |
|
|
806 symbol_table::pop_context (void) |
|
|
807 { |
|
3013
|
808 for (unsigned int i = 0; i < table_size; i++) |
|
220
|
809 { |
|
|
810 symbol_record *ptr = table[i].next (); |
|
|
811 |
|
530
|
812 while (ptr) |
|
220
|
813 { |
|
|
814 ptr->pop_context (); |
|
|
815 ptr = ptr->next (); |
|
|
816 } |
|
|
817 } |
|
|
818 } |
|
|
819 |
|
3013
|
820 void |
|
|
821 symbol_table::print_stats (void) |
|
|
822 { |
|
|
823 int count = 0; |
|
|
824 int empty_chains = 0; |
|
|
825 int max_chain_length = 0; |
|
|
826 int min_chain_length = INT_MAX; |
|
|
827 |
|
|
828 for (unsigned int i = 0; i < table_size; i++) |
|
|
829 { |
|
|
830 int num_this_chain = 0; |
|
|
831 |
|
|
832 symbol_record *ptr = table[i].next (); |
|
|
833 |
|
|
834 if (ptr) |
|
|
835 octave_stdout << "chain number " << i << ":\n"; |
|
|
836 else |
|
|
837 { |
|
|
838 empty_chains++; |
|
|
839 min_chain_length = 0; |
|
|
840 } |
|
|
841 |
|
|
842 while (ptr) |
|
|
843 { |
|
|
844 num_this_chain++; |
|
|
845 |
|
|
846 octave_stdout << " " << ptr->name () << "\n"; |
|
|
847 |
|
|
848 ptr = ptr->next (); |
|
|
849 } |
|
|
850 |
|
|
851 count += num_this_chain; |
|
|
852 |
|
|
853 if (num_this_chain > max_chain_length) |
|
|
854 max_chain_length = num_this_chain; |
|
|
855 |
|
|
856 if (num_this_chain < min_chain_length) |
|
|
857 min_chain_length = num_this_chain; |
|
|
858 |
|
|
859 if (num_this_chain > 0) |
|
|
860 octave_stdout << "\n"; |
|
|
861 } |
|
|
862 |
|
|
863 octave_stdout << "max chain length: " << max_chain_length << "\n"; |
|
|
864 octave_stdout << "min chain length: " << min_chain_length << "\n"; |
|
|
865 octave_stdout << "empty chains: " << empty_chains << "\n"; |
|
|
866 octave_stdout << "total chains: " << table_size << "\n"; |
|
|
867 octave_stdout << "total symbols: " << count << "\n"; |
|
|
868 } |
|
|
869 |
|
1
|
870 // Chris Torek's fave hash function. |
|
|
871 |
|
|
872 unsigned int |
|
1755
|
873 symbol_table::hash (const string& str) |
|
1
|
874 { |
|
2893
|
875 unsigned int h = 0; |
|
3013
|
876 |
|
2893
|
877 for (unsigned int i = 0; i < str.length (); i++) |
|
1755
|
878 h = h * 33 + str[i]; |
|
1
|
879 |
|
3013
|
880 return h & (table_size - 1); |
|
2790
|
881 } |
|
|
882 |
|
3308
|
883 |
|
|
884 static int |
|
|
885 variables_can_hide_functions (void) |
|
|
886 { |
|
|
887 Vvariables_can_hide_functions |
|
|
888 = check_preference ("variables_can_hide_functions"); |
|
|
889 |
|
|
890 return 0; |
|
|
891 } |
|
|
892 |
|
|
893 void |
|
|
894 symbols_of_symtab (void) |
|
|
895 { |
|
|
896 DEFVAR (variables_can_hide_functions, 1.0, variables_can_hide_functions, |
|
|
897 "Should variables be allowed to hide functions of the same name?"); |
|
|
898 } |
|
|
899 |
|
|
900 |
|
1
|
901 /* |
|
|
902 ;;; Local Variables: *** |
|
|
903 ;;; mode: C++ *** |
|
|
904 ;;; End: *** |
|
|
905 */ |
