|
428
|
1 /* "intern" and friends -- moved here from lread.c and data.c
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|
2 Copyright (C) 1985-1989, 1992-1994 Free Software Foundation, Inc.
|
|
793
|
3 Copyright (C) 1995, 2000, 2001, 2002 Ben Wing.
|
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428
|
4
|
|
|
5 This file is part of XEmacs.
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|
|
6
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|
|
7 XEmacs is free software; you can redistribute it and/or modify it
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|
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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
|
|
|
12 XEmacs 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
|
|
|
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
|
|
|
18 along with XEmacs; see the file COPYING. If not, write to
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|
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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|
20 Boston, MA 02111-1307, USA. */
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21
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|
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22 /* Synched up with: FSF 19.30. */
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23
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24 /* This file has been Mule-ized. */
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25
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|
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26 /* NOTE:
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27
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28 The value cell of a symbol can contain a simple value or one of
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29 various symbol-value-magic objects. Some of these objects can
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30 chain into other kinds of objects. Here is a table of possibilities:
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31
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32 1a) simple value
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33 1b) Qunbound
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34 1c) symbol-value-forward, excluding Qunbound
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35 2) symbol-value-buffer-local -> 1a or 1b or 1c
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36 3) symbol-value-lisp-magic -> 1a or 1b or 1c
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37 4) symbol-value-lisp-magic -> symbol-value-buffer-local -> 1a or 1b or 1c
|
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|
38 5) symbol-value-varalias
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|
39 6) symbol-value-lisp-magic -> symbol-value-varalias
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40
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41 The "chain" of a symbol-value-buffer-local is its current_value slot.
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42
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43 The "chain" of a symbol-value-lisp-magic is its shadowed slot, which
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44 applies for handler types without associated handlers.
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45
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46 All other fields in all the structures (including the "shadowed" slot
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47 in a symbol-value-varalias) can *only* contain a simple value or Qunbound.
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48
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|
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49 */
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50
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51 /* #### Ugh, though, this file does awful things with symbol-value-magic
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52 objects. This ought to be cleaned up. */
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53
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54 #include <config.h>
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55 #include "lisp.h"
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|
56
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|
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57 #include "buffer.h" /* for Vbuffer_defaults */
|
|
872
|
58 #include "console-impl.h"
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428
|
59 #include "elhash.h"
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60
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61 Lisp_Object Qad_advice_info, Qad_activate;
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62
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63 Lisp_Object Qget_value, Qset_value, Qbound_predicate, Qmake_unbound;
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64 Lisp_Object Qlocal_predicate, Qmake_local;
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65
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66 Lisp_Object Qboundp, Qglobally_boundp, Qmakunbound;
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67 Lisp_Object Qsymbol_value, Qset, Qdefault_boundp, Qdefault_value;
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68 Lisp_Object Qset_default, Qsetq_default;
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69 Lisp_Object Qmake_variable_buffer_local, Qmake_local_variable;
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70 Lisp_Object Qkill_local_variable, Qkill_console_local_variable;
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|
71 Lisp_Object Qsymbol_value_in_buffer, Qsymbol_value_in_console;
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|
72 Lisp_Object Qlocal_variable_p;
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73
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74 Lisp_Object Qconst_integer, Qconst_boolean, Qconst_object;
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75 Lisp_Object Qconst_specifier;
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76 Lisp_Object Qdefault_buffer, Qcurrent_buffer, Qconst_current_buffer;
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77 Lisp_Object Qdefault_console, Qselected_console, Qconst_selected_console;
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78
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79 static Lisp_Object maybe_call_magic_handler (Lisp_Object sym,
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80 Lisp_Object funsym,
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81 int nargs, ...);
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82 static Lisp_Object fetch_value_maybe_past_magic (Lisp_Object sym,
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83 Lisp_Object follow_past_lisp_magic);
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84 static Lisp_Object *value_slot_past_magic (Lisp_Object sym);
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85 static Lisp_Object follow_varalias_pointers (Lisp_Object symbol,
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86 Lisp_Object follow_past_lisp_magic);
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87
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88
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89 static Lisp_Object
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90 mark_symbol (Lisp_Object obj)
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91 {
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440
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92 Lisp_Symbol *sym = XSYMBOL (obj);
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428
|
93
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94 mark_object (sym->value);
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|
95 mark_object (sym->function);
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|
793
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96 mark_object (sym->name);
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428
|
97 if (!symbol_next (sym))
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98 return sym->plist;
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99 else
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100 {
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101 mark_object (sym->plist);
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102 /* Mark the rest of the symbols in the obarray hash-chain */
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103 sym = symbol_next (sym);
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793
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104 return wrap_symbol (sym);
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428
|
105 }
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106 }
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107
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108 static const struct lrecord_description symbol_description[] = {
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440
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109 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, next) },
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110 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, name) },
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111 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, value) },
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112 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, function) },
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113 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, plist) },
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428
|
114 { XD_END }
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115 };
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116
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442
|
117 /* Symbol plists are directly accessible, so we need to protect against
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118 invalid property list structure */
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119
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120 static Lisp_Object
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121 symbol_getprop (Lisp_Object symbol, Lisp_Object property)
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122 {
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123 return external_plist_get (&XSYMBOL (symbol)->plist, property, 0, ERROR_ME);
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124 }
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125
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126 static int
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127 symbol_putprop (Lisp_Object symbol, Lisp_Object property, Lisp_Object value)
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128 {
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129 external_plist_put (&XSYMBOL (symbol)->plist, property, value, 0, ERROR_ME);
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130 return 1;
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131 }
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132
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133 static int
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134 symbol_remprop (Lisp_Object symbol, Lisp_Object property)
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135 {
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136 return external_remprop (&XSYMBOL (symbol)->plist, property, 0, ERROR_ME);
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137 }
|
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138
|
|
934
|
139 #ifdef USE_KKCC
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140 DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS ("symbol", symbol,
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141 1, /*dumpable-flag*/
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|
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142 mark_symbol, print_symbol,
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143 0, 0, 0, symbol_description,
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|
144 symbol_getprop,
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|
145 symbol_putprop,
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|
|
146 symbol_remprop,
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|
|
147 Fsymbol_plist,
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|
|
148 Lisp_Symbol);
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|
|
149 #else /* not USE_KKCC */
|
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442
|
150 DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS ("symbol", symbol,
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151 mark_symbol, print_symbol,
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|
|
152 0, 0, 0, symbol_description,
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153 symbol_getprop,
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|
|
154 symbol_putprop,
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|
|
155 symbol_remprop,
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|
|
156 Fsymbol_plist,
|
|
|
157 Lisp_Symbol);
|
|
934
|
158 #endif /* not USE_KKCC */
|
|
428
|
159
|
|
|
160 /**********************************************************************/
|
|
|
161 /* Intern */
|
|
|
162 /**********************************************************************/
|
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|
163
|
|
|
164 /* #### using a vector here is way bogus. Use a hash table instead. */
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165
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|
166 Lisp_Object Vobarray;
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|
167
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|
|
168 static Lisp_Object initial_obarray;
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169
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|
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170 /* oblookup stores the bucket number here, for the sake of Funintern. */
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171
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172 static int oblookup_last_bucket_number;
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173
|
|
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174 static Lisp_Object
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175 check_obarray (Lisp_Object obarray)
|
|
|
176 {
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|
|
177 while (!VECTORP (obarray) || XVECTOR_LENGTH (obarray) == 0)
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|
178 {
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|
|
179 /* If Vobarray is now invalid, force it to be valid. */
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|
180 if (EQ (Vobarray, obarray)) Vobarray = initial_obarray;
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181
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|
|
182 obarray = wrong_type_argument (Qvectorp, obarray);
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|
183 }
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|
|
184 return obarray;
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|
|
185 }
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|
186
|
|
|
187 Lisp_Object
|
|
867
|
188 intern_int (const Ibyte *str)
|
|
428
|
189 {
|
|
771
|
190 Bytecount len = qxestrlen (str);
|
|
428
|
191 Lisp_Object obarray = Vobarray;
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|
192
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|
|
193 if (!VECTORP (obarray) || XVECTOR_LENGTH (obarray) == 0)
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|
194 obarray = check_obarray (obarray);
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195
|
|
|
196 {
|
|
771
|
197 Lisp_Object tem = oblookup (obarray, str, len);
|
|
428
|
198 if (SYMBOLP (tem))
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|
|
199 return tem;
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|
|
200 }
|
|
|
201
|
|
771
|
202 return Fintern (make_string (str, len), obarray);
|
|
|
203 }
|
|
|
204
|
|
|
205 Lisp_Object
|
|
867
|
206 intern (const CIbyte *str)
|
|
771
|
207 {
|
|
867
|
208 return intern_int ((Ibyte *) str);
|
|
428
|
209 }
|
|
|
210
|
|
814
|
211 Lisp_Object
|
|
867
|
212 intern_converting_underscores_to_dashes (const CIbyte *str)
|
|
814
|
213 {
|
|
|
214 Bytecount len = strlen (str);
|
|
867
|
215 CIbyte *tmp = alloca_extbytes (len + 1);
|
|
814
|
216 Bytecount i;
|
|
|
217 strcpy (tmp, str);
|
|
|
218 for (i = 0; i < len; i++)
|
|
|
219 if (tmp[i] == '_')
|
|
|
220 tmp[i] = '-';
|
|
867
|
221 return intern_int ((Ibyte *) tmp);
|
|
814
|
222 }
|
|
|
223
|
|
428
|
224 DEFUN ("intern", Fintern, 1, 2, 0, /*
|
|
|
225 Return the canonical symbol whose name is STRING.
|
|
|
226 If there is none, one is created by this function and returned.
|
|
444
|
227 Optional second argument OBARRAY specifies the obarray to use;
|
|
|
228 it defaults to the value of the variable `obarray'.
|
|
428
|
229 */
|
|
|
230 (string, obarray))
|
|
|
231 {
|
|
|
232 Lisp_Object object, *ptr;
|
|
793
|
233 Lisp_Object symbol;
|
|
428
|
234 Bytecount len;
|
|
|
235
|
|
|
236 if (NILP (obarray)) obarray = Vobarray;
|
|
|
237 obarray = check_obarray (obarray);
|
|
|
238
|
|
|
239 CHECK_STRING (string);
|
|
|
240
|
|
|
241 len = XSTRING_LENGTH (string);
|
|
|
242 object = oblookup (obarray, XSTRING_DATA (string), len);
|
|
|
243 if (!INTP (object))
|
|
|
244 /* Found it */
|
|
|
245 return object;
|
|
|
246
|
|
|
247 ptr = &XVECTOR_DATA (obarray)[XINT (object)];
|
|
|
248
|
|
|
249 object = Fmake_symbol (string);
|
|
793
|
250 symbol = object;
|
|
428
|
251
|
|
|
252 if (SYMBOLP (*ptr))
|
|
793
|
253 XSYMBOL_NEXT (symbol) = XSYMBOL (*ptr);
|
|
428
|
254 else
|
|
793
|
255 XSYMBOL_NEXT (symbol) = 0;
|
|
428
|
256 *ptr = object;
|
|
|
257
|
|
826
|
258 if (string_byte (XSYMBOL_NAME (symbol), 0) == ':' && EQ (obarray, Vobarray))
|
|
428
|
259 {
|
|
|
260 /* The LISP way is to put keywords in their own package, but we
|
|
|
261 don't have packages, so we do something simpler. Someday,
|
|
|
262 maybe we'll have packages and then this will be reworked.
|
|
|
263 --Stig. */
|
|
793
|
264 XSYMBOL_VALUE (symbol) = object;
|
|
428
|
265 }
|
|
|
266
|
|
|
267 return object;
|
|
|
268 }
|
|
|
269
|
|
|
270 DEFUN ("intern-soft", Fintern_soft, 1, 2, 0, /*
|
|
|
271 Return the canonical symbol named NAME, or nil if none exists.
|
|
|
272 NAME may be a string or a symbol. If it is a symbol, that exact
|
|
|
273 symbol is searched for.
|
|
444
|
274 Optional second argument OBARRAY specifies the obarray to use;
|
|
|
275 it defaults to the value of the variable `obarray'.
|
|
428
|
276 */
|
|
|
277 (name, obarray))
|
|
|
278 {
|
|
|
279 /* #### Bug! (intern-soft "nil") returns nil. Perhaps we should
|
|
|
280 add a DEFAULT-IF-NOT-FOUND arg, like in get. */
|
|
|
281 Lisp_Object tem;
|
|
793
|
282 Lisp_Object string;
|
|
428
|
283
|
|
|
284 if (NILP (obarray)) obarray = Vobarray;
|
|
|
285 obarray = check_obarray (obarray);
|
|
|
286
|
|
|
287 if (!SYMBOLP (name))
|
|
|
288 {
|
|
|
289 CHECK_STRING (name);
|
|
793
|
290 string = name;
|
|
428
|
291 }
|
|
|
292 else
|
|
|
293 string = symbol_name (XSYMBOL (name));
|
|
|
294
|
|
793
|
295 tem = oblookup (obarray, XSTRING_DATA (string), XSTRING_LENGTH (string));
|
|
428
|
296 if (INTP (tem) || (SYMBOLP (name) && !EQ (name, tem)))
|
|
|
297 return Qnil;
|
|
|
298 else
|
|
|
299 return tem;
|
|
|
300 }
|
|
|
301
|
|
|
302 DEFUN ("unintern", Funintern, 1, 2, 0, /*
|
|
|
303 Delete the symbol named NAME, if any, from OBARRAY.
|
|
|
304 The value is t if a symbol was found and deleted, nil otherwise.
|
|
|
305 NAME may be a string or a symbol. If it is a symbol, that symbol
|
|
|
306 is deleted, if it belongs to OBARRAY--no other symbol is deleted.
|
|
444
|
307 OBARRAY defaults to the value of the variable `obarray'.
|
|
428
|
308 */
|
|
|
309 (name, obarray))
|
|
|
310 {
|
|
|
311 Lisp_Object tem;
|
|
793
|
312 Lisp_Object string;
|
|
428
|
313 int hash;
|
|
|
314
|
|
|
315 if (NILP (obarray)) obarray = Vobarray;
|
|
|
316 obarray = check_obarray (obarray);
|
|
|
317
|
|
|
318 if (SYMBOLP (name))
|
|
|
319 string = symbol_name (XSYMBOL (name));
|
|
|
320 else
|
|
|
321 {
|
|
|
322 CHECK_STRING (name);
|
|
793
|
323 string = name;
|
|
428
|
324 }
|
|
|
325
|
|
793
|
326 tem = oblookup (obarray, XSTRING_DATA (string), XSTRING_LENGTH (string));
|
|
428
|
327 if (INTP (tem))
|
|
|
328 return Qnil;
|
|
|
329 /* If arg was a symbol, don't delete anything but that symbol itself. */
|
|
|
330 if (SYMBOLP (name) && !EQ (name, tem))
|
|
|
331 return Qnil;
|
|
|
332
|
|
|
333 hash = oblookup_last_bucket_number;
|
|
|
334
|
|
|
335 if (EQ (XVECTOR_DATA (obarray)[hash], tem))
|
|
|
336 {
|
|
|
337 if (XSYMBOL (tem)->next)
|
|
793
|
338 XVECTOR_DATA (obarray)[hash] = wrap_symbol (XSYMBOL (tem)->next);
|
|
428
|
339 else
|
|
|
340 XVECTOR_DATA (obarray)[hash] = Qzero;
|
|
|
341 }
|
|
|
342 else
|
|
|
343 {
|
|
|
344 Lisp_Object tail, following;
|
|
|
345
|
|
|
346 for (tail = XVECTOR_DATA (obarray)[hash];
|
|
|
347 XSYMBOL (tail)->next;
|
|
|
348 tail = following)
|
|
|
349 {
|
|
793
|
350 following = wrap_symbol (XSYMBOL (tail)->next);
|
|
428
|
351 if (EQ (following, tem))
|
|
|
352 {
|
|
|
353 XSYMBOL (tail)->next = XSYMBOL (following)->next;
|
|
|
354 break;
|
|
|
355 }
|
|
|
356 }
|
|
|
357 }
|
|
|
358 return Qt;
|
|
|
359 }
|
|
|
360
|
|
|
361 /* Return the symbol in OBARRAY whose names matches the string
|
|
|
362 of SIZE characters at PTR. If there is no such symbol in OBARRAY,
|
|
|
363 return the index into OBARRAY that the string hashes to.
|
|
|
364
|
|
|
365 Also store the bucket number in oblookup_last_bucket_number. */
|
|
|
366
|
|
|
367 Lisp_Object
|
|
867
|
368 oblookup (Lisp_Object obarray, const Ibyte *ptr, Bytecount size)
|
|
428
|
369 {
|
|
490
|
370 unsigned int hash, obsize;
|
|
440
|
371 Lisp_Symbol *tail;
|
|
428
|
372 Lisp_Object bucket;
|
|
|
373
|
|
|
374 if (!VECTORP (obarray) ||
|
|
|
375 (obsize = XVECTOR_LENGTH (obarray)) == 0)
|
|
|
376 {
|
|
|
377 obarray = check_obarray (obarray);
|
|
|
378 obsize = XVECTOR_LENGTH (obarray);
|
|
|
379 }
|
|
|
380 hash = hash_string (ptr, size) % obsize;
|
|
|
381 oblookup_last_bucket_number = hash;
|
|
|
382 bucket = XVECTOR_DATA (obarray)[hash];
|
|
|
383 if (ZEROP (bucket))
|
|
|
384 ;
|
|
|
385 else if (!SYMBOLP (bucket))
|
|
563
|
386 signal_error (Qinvalid_state, "Bad data in guts of obarray", Qunbound); /* Like CADR error message */
|
|
428
|
387 else
|
|
|
388 for (tail = XSYMBOL (bucket); ;)
|
|
|
389 {
|
|
793
|
390 if (XSTRING_LENGTH (tail->name) == size &&
|
|
|
391 !memcmp (XSTRING_DATA (tail->name), ptr, size))
|
|
428
|
392 {
|
|
793
|
393 return wrap_symbol (tail);
|
|
428
|
394 }
|
|
|
395 tail = symbol_next (tail);
|
|
|
396 if (!tail)
|
|
|
397 break;
|
|
|
398 }
|
|
|
399 return make_int (hash);
|
|
|
400 }
|
|
|
401
|
|
490
|
402 /* An excellent string hashing function.
|
|
|
403 Adapted from glib's g_str_hash().
|
|
|
404 Investigation by Karl Nelson <kenelson@ece.ucdavis.edu>.
|
|
|
405 Do a web search for "g_str_hash X31_HASH" if you want to know more. */
|
|
|
406 unsigned int
|
|
867
|
407 hash_string (const Ibyte *ptr, Bytecount len)
|
|
428
|
408 {
|
|
490
|
409 unsigned int hash;
|
|
|
410
|
|
|
411 for (hash = 0; len; len--, ptr++)
|
|
|
412 /* (31 * hash) will probably be optimized to ((hash << 5) - hash). */
|
|
|
413 hash = 31 * hash + *ptr;
|
|
|
414
|
|
|
415 return hash;
|
|
428
|
416 }
|
|
|
417
|
|
|
418 /* Map FN over OBARRAY. The mapping is stopped when FN returns a
|
|
|
419 non-zero value. */
|
|
|
420 void
|
|
|
421 map_obarray (Lisp_Object obarray,
|
|
|
422 int (*fn) (Lisp_Object, void *), void *arg)
|
|
|
423 {
|
|
|
424 REGISTER int i;
|
|
|
425
|
|
|
426 CHECK_VECTOR (obarray);
|
|
|
427 for (i = XVECTOR_LENGTH (obarray) - 1; i >= 0; i--)
|
|
|
428 {
|
|
|
429 Lisp_Object tail = XVECTOR_DATA (obarray)[i];
|
|
|
430 if (SYMBOLP (tail))
|
|
|
431 while (1)
|
|
|
432 {
|
|
440
|
433 Lisp_Symbol *next;
|
|
428
|
434 if ((*fn) (tail, arg))
|
|
|
435 return;
|
|
|
436 next = symbol_next (XSYMBOL (tail));
|
|
|
437 if (!next)
|
|
|
438 break;
|
|
793
|
439 tail = wrap_symbol (next);
|
|
428
|
440 }
|
|
|
441 }
|
|
|
442 }
|
|
|
443
|
|
|
444 static int
|
|
|
445 mapatoms_1 (Lisp_Object sym, void *arg)
|
|
|
446 {
|
|
|
447 call1 (*(Lisp_Object *)arg, sym);
|
|
|
448 return 0;
|
|
|
449 }
|
|
|
450
|
|
|
451 DEFUN ("mapatoms", Fmapatoms, 1, 2, 0, /*
|
|
|
452 Call FUNCTION on every symbol in OBARRAY.
|
|
|
453 OBARRAY defaults to the value of `obarray'.
|
|
|
454 */
|
|
|
455 (function, obarray))
|
|
|
456 {
|
|
442
|
457 struct gcpro gcpro1;
|
|
|
458
|
|
428
|
459 if (NILP (obarray))
|
|
|
460 obarray = Vobarray;
|
|
|
461 obarray = check_obarray (obarray);
|
|
|
462
|
|
442
|
463 GCPRO1 (obarray);
|
|
428
|
464 map_obarray (obarray, mapatoms_1, &function);
|
|
442
|
465 UNGCPRO;
|
|
428
|
466 return Qnil;
|
|
|
467 }
|
|
|
468
|
|
|
469
|
|
|
470 /**********************************************************************/
|
|
|
471 /* Apropos */
|
|
|
472 /**********************************************************************/
|
|
|
473
|
|
|
474 struct appropos_mapper_closure
|
|
|
475 {
|
|
|
476 Lisp_Object regexp;
|
|
|
477 Lisp_Object predicate;
|
|
|
478 Lisp_Object accumulation;
|
|
|
479 };
|
|
|
480
|
|
|
481 static int
|
|
|
482 apropos_mapper (Lisp_Object symbol, void *arg)
|
|
|
483 {
|
|
|
484 struct appropos_mapper_closure *closure =
|
|
|
485 (struct appropos_mapper_closure *) arg;
|
|
|
486 Bytecount match = fast_lisp_string_match (closure->regexp,
|
|
|
487 Fsymbol_name (symbol));
|
|
|
488
|
|
|
489 if (match >= 0 &&
|
|
|
490 (NILP (closure->predicate) ||
|
|
|
491 !NILP (call1 (closure->predicate, symbol))))
|
|
|
492 closure->accumulation = Fcons (symbol, closure->accumulation);
|
|
|
493
|
|
|
494 return 0;
|
|
|
495 }
|
|
|
496
|
|
|
497 DEFUN ("apropos-internal", Fapropos_internal, 1, 2, 0, /*
|
|
444
|
498 Return a list of all symbols whose names contain match for REGEXP.
|
|
|
499 If optional 2nd arg PREDICATE is non-nil, only symbols for which
|
|
|
500 \(funcall PREDICATE SYMBOL) returns non-nil are returned.
|
|
428
|
501 */
|
|
|
502 (regexp, predicate))
|
|
|
503 {
|
|
|
504 struct appropos_mapper_closure closure;
|
|
442
|
505 struct gcpro gcpro1;
|
|
428
|
506
|
|
|
507 CHECK_STRING (regexp);
|
|
|
508
|
|
|
509 closure.regexp = regexp;
|
|
|
510 closure.predicate = predicate;
|
|
|
511 closure.accumulation = Qnil;
|
|
442
|
512 GCPRO1 (closure.accumulation);
|
|
428
|
513 map_obarray (Vobarray, apropos_mapper, &closure);
|
|
|
514 closure.accumulation = Fsort (closure.accumulation, Qstring_lessp);
|
|
442
|
515 UNGCPRO;
|
|
428
|
516 return closure.accumulation;
|
|
|
517 }
|
|
|
518
|
|
|
519
|
|
|
520 /* Extract and set components of symbols */
|
|
|
521
|
|
|
522 static void set_up_buffer_local_cache (Lisp_Object sym,
|
|
|
523 struct symbol_value_buffer_local *bfwd,
|
|
|
524 struct buffer *buf,
|
|
|
525 Lisp_Object new_alist_el,
|
|
|
526 int set_it_p);
|
|
|
527
|
|
|
528 DEFUN ("boundp", Fboundp, 1, 1, 0, /*
|
|
|
529 Return t if SYMBOL's value is not void.
|
|
|
530 */
|
|
|
531 (symbol))
|
|
|
532 {
|
|
|
533 CHECK_SYMBOL (symbol);
|
|
|
534 return UNBOUNDP (find_symbol_value (symbol)) ? Qnil : Qt;
|
|
|
535 }
|
|
|
536
|
|
|
537 DEFUN ("globally-boundp", Fglobally_boundp, 1, 1, 0, /*
|
|
|
538 Return t if SYMBOL has a global (non-bound) value.
|
|
|
539 This is for the byte-compiler; you really shouldn't be using this.
|
|
|
540 */
|
|
|
541 (symbol))
|
|
|
542 {
|
|
|
543 CHECK_SYMBOL (symbol);
|
|
|
544 return UNBOUNDP (top_level_value (symbol)) ? Qnil : Qt;
|
|
|
545 }
|
|
|
546
|
|
|
547 DEFUN ("fboundp", Ffboundp, 1, 1, 0, /*
|
|
|
548 Return t if SYMBOL's function definition is not void.
|
|
|
549 */
|
|
|
550 (symbol))
|
|
|
551 {
|
|
|
552 CHECK_SYMBOL (symbol);
|
|
|
553 return UNBOUNDP (XSYMBOL (symbol)->function) ? Qnil : Qt;
|
|
|
554 }
|
|
|
555
|
|
|
556 /* Return non-zero if SYM's value or function (the current contents of
|
|
|
557 which should be passed in as VAL) is constant, i.e. unsettable. */
|
|
|
558
|
|
|
559 static int
|
|
|
560 symbol_is_constant (Lisp_Object sym, Lisp_Object val)
|
|
|
561 {
|
|
|
562 /* #### - I wonder if it would be better to just have a new magic value
|
|
|
563 type and make nil, t, and all keywords have that same magic
|
|
|
564 constant_symbol value. This test is awfully specific about what is
|
|
|
565 constant and what isn't. --Stig */
|
|
|
566 if (EQ (sym, Qnil) ||
|
|
|
567 EQ (sym, Qt))
|
|
|
568 return 1;
|
|
|
569
|
|
|
570 if (SYMBOL_VALUE_MAGIC_P (val))
|
|
|
571 switch (XSYMBOL_VALUE_MAGIC_TYPE (val))
|
|
|
572 {
|
|
|
573 case SYMVAL_CONST_OBJECT_FORWARD:
|
|
|
574 case SYMVAL_CONST_SPECIFIER_FORWARD:
|
|
|
575 case SYMVAL_CONST_FIXNUM_FORWARD:
|
|
|
576 case SYMVAL_CONST_BOOLEAN_FORWARD:
|
|
|
577 case SYMVAL_CONST_CURRENT_BUFFER_FORWARD:
|
|
|
578 case SYMVAL_CONST_SELECTED_CONSOLE_FORWARD:
|
|
|
579 return 1;
|
|
|
580 default: break; /* Warning suppression */
|
|
|
581 }
|
|
|
582
|
|
|
583 /* We don't return true for keywords here because they are handled
|
|
|
584 specially by reject_constant_symbols(). */
|
|
|
585 return 0;
|
|
|
586 }
|
|
|
587
|
|
|
588 /* We are setting SYM's value slot (or function slot, if FUNCTION_P is
|
|
|
589 non-zero) to NEWVAL. Make sure this is allowed.
|
|
|
590 FOLLOW_PAST_LISP_MAGIC specifies whether we delve past
|
|
|
591 symbol-value-lisp-magic objects. */
|
|
|
592
|
|
|
593 void
|
|
|
594 reject_constant_symbols (Lisp_Object sym, Lisp_Object newval, int function_p,
|
|
|
595 Lisp_Object follow_past_lisp_magic)
|
|
|
596 {
|
|
|
597 Lisp_Object val =
|
|
|
598 (function_p ? XSYMBOL (sym)->function
|
|
|
599 : fetch_value_maybe_past_magic (sym, follow_past_lisp_magic));
|
|
|
600
|
|
|
601 if (SYMBOL_VALUE_MAGIC_P (val) &&
|
|
|
602 XSYMBOL_VALUE_MAGIC_TYPE (val) == SYMVAL_CONST_SPECIFIER_FORWARD)
|
|
563
|
603 invalid_change ("Use `set-specifier' to change a specifier's value",
|
|
|
604 sym);
|
|
428
|
605
|
|
996
|
606 if (
|
|
|
607 #ifdef HAVE_SHLIB
|
|
|
608 !(unloading_module && UNBOUNDP(newval)) &&
|
|
|
609 #endif
|
|
|
610 (symbol_is_constant (sym, val)
|
|
|
611 || (SYMBOL_IS_KEYWORD (sym) && !EQ (newval, sym))))
|
|
563
|
612 signal_error_1 (Qsetting_constant,
|
|
|
613 UNBOUNDP (newval) ? list1 (sym) : list2 (sym, newval));
|
|
428
|
614 }
|
|
|
615
|
|
|
616 /* Verify that it's ok to make SYM buffer-local. This rejects
|
|
|
617 constants and default-buffer-local variables. FOLLOW_PAST_LISP_MAGIC
|
|
|
618 specifies whether we delve into symbol-value-lisp-magic objects.
|
|
|
619 (Should be a symbol indicating what action is being taken; that way,
|
|
|
620 we don't delve if there's a handler for that action, but do otherwise.) */
|
|
|
621
|
|
|
622 static void
|
|
|
623 verify_ok_for_buffer_local (Lisp_Object sym,
|
|
|
624 Lisp_Object follow_past_lisp_magic)
|
|
|
625 {
|
|
|
626 Lisp_Object val = fetch_value_maybe_past_magic (sym, follow_past_lisp_magic);
|
|
|
627
|
|
|
628 if (symbol_is_constant (sym, val))
|
|
|
629 goto not_ok;
|
|
|
630 if (SYMBOL_VALUE_MAGIC_P (val))
|
|
|
631 switch (XSYMBOL_VALUE_MAGIC_TYPE (val))
|
|
|
632 {
|
|
|
633 case SYMVAL_DEFAULT_BUFFER_FORWARD:
|
|
|
634 case SYMVAL_DEFAULT_CONSOLE_FORWARD:
|
|
|
635 /* #### It's theoretically possible for it to be reasonable
|
|
|
636 to have both console-local and buffer-local variables,
|
|
|
637 but I don't want to consider that right now. */
|
|
|
638 case SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
639 goto not_ok;
|
|
|
640 default: break; /* Warning suppression */
|
|
|
641 }
|
|
|
642
|
|
|
643 return;
|
|
|
644
|
|
|
645 not_ok:
|
|
563
|
646 invalid_change ("Symbol may not be buffer-local", sym);
|
|
428
|
647 }
|
|
|
648
|
|
|
649 DEFUN ("makunbound", Fmakunbound, 1, 1, 0, /*
|
|
|
650 Make SYMBOL's value be void.
|
|
|
651 */
|
|
|
652 (symbol))
|
|
|
653 {
|
|
|
654 Fset (symbol, Qunbound);
|
|
|
655 return symbol;
|
|
|
656 }
|
|
|
657
|
|
|
658 DEFUN ("fmakunbound", Ffmakunbound, 1, 1, 0, /*
|
|
|
659 Make SYMBOL's function definition be void.
|
|
|
660 */
|
|
|
661 (symbol))
|
|
|
662 {
|
|
|
663 CHECK_SYMBOL (symbol);
|
|
|
664 reject_constant_symbols (symbol, Qunbound, 1, Qt);
|
|
|
665 XSYMBOL (symbol)->function = Qunbound;
|
|
|
666 return symbol;
|
|
|
667 }
|
|
|
668
|
|
|
669 DEFUN ("symbol-function", Fsymbol_function, 1, 1, 0, /*
|
|
|
670 Return SYMBOL's function definition. Error if that is void.
|
|
|
671 */
|
|
|
672 (symbol))
|
|
|
673 {
|
|
|
674 CHECK_SYMBOL (symbol);
|
|
|
675 if (UNBOUNDP (XSYMBOL (symbol)->function))
|
|
|
676 signal_void_function_error (symbol);
|
|
|
677 return XSYMBOL (symbol)->function;
|
|
|
678 }
|
|
|
679
|
|
|
680 DEFUN ("symbol-plist", Fsymbol_plist, 1, 1, 0, /*
|
|
|
681 Return SYMBOL's property list.
|
|
|
682 */
|
|
|
683 (symbol))
|
|
|
684 {
|
|
|
685 CHECK_SYMBOL (symbol);
|
|
|
686 return XSYMBOL (symbol)->plist;
|
|
|
687 }
|
|
|
688
|
|
|
689 DEFUN ("symbol-name", Fsymbol_name, 1, 1, 0, /*
|
|
|
690 Return SYMBOL's name, a string.
|
|
|
691 */
|
|
|
692 (symbol))
|
|
|
693 {
|
|
|
694 CHECK_SYMBOL (symbol);
|
|
793
|
695 return XSYMBOL (symbol)->name;
|
|
428
|
696 }
|
|
|
697
|
|
|
698 DEFUN ("fset", Ffset, 2, 2, 0, /*
|
|
|
699 Set SYMBOL's function definition to NEWDEF, and return NEWDEF.
|
|
|
700 */
|
|
|
701 (symbol, newdef))
|
|
|
702 {
|
|
|
703 /* This function can GC */
|
|
|
704 CHECK_SYMBOL (symbol);
|
|
|
705 reject_constant_symbols (symbol, newdef, 1, Qt);
|
|
|
706 if (!NILP (Vautoload_queue) && !UNBOUNDP (XSYMBOL (symbol)->function))
|
|
|
707 Vautoload_queue = Fcons (Fcons (symbol, XSYMBOL (symbol)->function),
|
|
|
708 Vautoload_queue);
|
|
|
709 XSYMBOL (symbol)->function = newdef;
|
|
|
710 /* Handle automatic advice activation */
|
|
|
711 if (CONSP (XSYMBOL (symbol)->plist) &&
|
|
|
712 !NILP (Fget (symbol, Qad_advice_info, Qnil)))
|
|
|
713 {
|
|
|
714 call2 (Qad_activate, symbol, Qnil);
|
|
|
715 newdef = XSYMBOL (symbol)->function;
|
|
|
716 }
|
|
|
717 return newdef;
|
|
|
718 }
|
|
|
719
|
|
|
720 /* FSFmacs */
|
|
|
721 DEFUN ("define-function", Fdefine_function, 2, 2, 0, /*
|
|
|
722 Set SYMBOL's function definition to NEWDEF, and return NEWDEF.
|
|
|
723 Associates the function with the current load file, if any.
|
|
|
724 */
|
|
|
725 (symbol, newdef))
|
|
|
726 {
|
|
|
727 /* This function can GC */
|
|
|
728 Ffset (symbol, newdef);
|
|
|
729 LOADHIST_ATTACH (symbol);
|
|
|
730 return newdef;
|
|
|
731 }
|
|
|
732
|
|
|
733
|
|
|
734 DEFUN ("setplist", Fsetplist, 2, 2, 0, /*
|
|
|
735 Set SYMBOL's property list to NEWPLIST, and return NEWPLIST.
|
|
|
736 */
|
|
|
737 (symbol, newplist))
|
|
|
738 {
|
|
|
739 CHECK_SYMBOL (symbol);
|
|
|
740 #if 0 /* Inserted for debugging 6/28/1997 -slb */
|
|
|
741 /* Somebody is setting a property list of integer 0, who? */
|
|
|
742 /* Not this way apparently. */
|
|
|
743 if (EQ(newplist, Qzero)) abort();
|
|
|
744 #endif
|
|
|
745
|
|
|
746 XSYMBOL (symbol)->plist = newplist;
|
|
|
747 return newplist;
|
|
|
748 }
|
|
|
749
|
|
|
750
|
|
|
751 /**********************************************************************/
|
|
|
752 /* symbol-value */
|
|
|
753 /**********************************************************************/
|
|
|
754
|
|
|
755 /* If the contents of the value cell of a symbol is one of the following
|
|
|
756 three types of objects, then the symbol is "magic" in that setting
|
|
|
757 and retrieving its value doesn't just set or retrieve the raw
|
|
|
758 contents of the value cell. None of these objects can escape to
|
|
|
759 the user level, so there is no loss of generality.
|
|
|
760
|
|
|
761 If a symbol is "unbound", then the contents of its value cell is
|
|
|
762 Qunbound. Despite appearances, this is *not* a symbol, but is a
|
|
|
763 symbol-value-forward object. This is so that printing it results
|
|
|
764 in "INTERNAL OBJECT (XEmacs bug?)", in case it leaks to Lisp, somehow.
|
|
|
765
|
|
|
766 Logically all of the following objects are "symbol-value-magic"
|
|
|
767 objects, and there are some games played w.r.t. this (#### this
|
|
|
768 should be cleaned up). SYMBOL_VALUE_MAGIC_P is true for all of
|
|
|
769 the object types. XSYMBOL_VALUE_MAGIC_TYPE returns the type of
|
|
|
770 symbol-value-magic object. There are more than three types
|
|
|
771 returned by this macro: in particular, symbol-value-forward
|
|
|
772 has eight subtypes, and symbol-value-buffer-local has two. See
|
|
|
773 symeval.h.
|
|
|
774
|
|
|
775 1. symbol-value-forward
|
|
|
776
|
|
|
777 symbol-value-forward is used for variables whose actual contents
|
|
|
778 are stored in a C variable of some sort, and for Qunbound. The
|
|
|
779 lcheader.next field (which is only used to chain together free
|
|
|
780 lcrecords) holds a pointer to the actual C variable. Included
|
|
|
781 in this type are "buffer-local" variables that are actually
|
|
|
782 stored in the buffer object itself; in this case, the "pointer"
|
|
|
783 is an offset into the struct buffer structure.
|
|
|
784
|
|
|
785 The subtypes are as follows:
|
|
|
786
|
|
|
787 SYMVAL_OBJECT_FORWARD:
|
|
|
788 (declare with DEFVAR_LISP)
|
|
|
789 The value of this variable is stored in a C variable of type
|
|
|
790 "Lisp_Object". Setting this variable sets the C variable.
|
|
|
791 Accessing this variable retrieves a value from the C variable.
|
|
|
792 These variables can be buffer-local -- in this case, the
|
|
|
793 raw symbol-value field gets converted into a
|
|
|
794 symbol-value-buffer-local, whose "current_value" slot contains
|
|
|
795 the symbol-value-forward. (See below.)
|
|
|
796
|
|
|
797 SYMVAL_FIXNUM_FORWARD:
|
|
458
|
798 (declare with DEFVAR_INT)
|
|
|
799 Similar to SYMVAL_OBJECT_FORWARD except that the C variable
|
|
|
800 is of type "Fixnum", a typedef for "EMACS_INT", and the corresponding
|
|
|
801 lisp variable is always the corresponding integer.
|
|
|
802
|
|
428
|
803 SYMVAL_BOOLEAN_FORWARD:
|
|
458
|
804 (declare with DEFVAR_BOOL)
|
|
428
|
805 Similar to SYMVAL_OBJECT_FORWARD except that the C variable
|
|
458
|
806 is of type "int" and is a boolean.
|
|
428
|
807
|
|
|
808 SYMVAL_CONST_OBJECT_FORWARD:
|
|
|
809 SYMVAL_CONST_FIXNUM_FORWARD:
|
|
|
810 SYMVAL_CONST_BOOLEAN_FORWARD:
|
|
|
811 (declare with DEFVAR_CONST_LISP, DEFVAR_CONST_INT, or
|
|
|
812 DEFVAR_CONST_BOOL)
|
|
|
813 Similar to SYMVAL_OBJECT_FORWARD, SYMVAL_FIXNUM_FORWARD, or
|
|
|
814 SYMVAL_BOOLEAN_FORWARD, respectively, except that the value cannot
|
|
|
815 be changed.
|
|
|
816
|
|
|
817 SYMVAL_CONST_SPECIFIER_FORWARD:
|
|
|
818 (declare with DEFVAR_SPECIFIER)
|
|
440
|
819 Exactly like SYMVAL_CONST_OBJECT_FORWARD except that the error
|
|
|
820 message you get when attempting to set the value says to use
|
|
428
|
821 `set-specifier' instead.
|
|
|
822
|
|
|
823 SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
824 (declare with DEFVAR_BUFFER_LOCAL)
|
|
|
825 This is used for built-in buffer-local variables -- i.e.
|
|
|
826 Lisp variables whose value is stored in the "struct buffer".
|
|
|
827 Variables of this sort always forward into C "Lisp_Object"
|
|
|
828 fields (although there's no reason in principle that other
|
|
|
829 types for ints and booleans couldn't be added). Note that
|
|
|
830 some of these variables are automatically local in each
|
|
|
831 buffer, while some are only local when they become set
|
|
|
832 (similar to `make-variable-buffer-local'). In these latter
|
|
|
833 cases, of course, the default value shows through in all
|
|
|
834 buffers in which the variable doesn't have a local value.
|
|
|
835 This is implemented by making sure the "struct buffer" field
|
|
|
836 always contains the correct value (whether it's local or
|
|
|
837 a default) and maintaining a mask in the "struct buffer"
|
|
|
838 indicating which fields are local. When `set-default' is
|
|
|
839 called on a variable that's not always local to all buffers,
|
|
|
840 it loops through each buffer and sets the corresponding
|
|
|
841 field in each buffer without a local value for the field,
|
|
|
842 according to the mask.
|
|
|
843
|
|
|
844 Calling `make-local-variable' on a variable of this sort
|
|
|
845 only has the effect of maybe changing the current buffer's mask.
|
|
|
846 Calling `make-variable-buffer-local' on a variable of this
|
|
|
847 sort has no effect at all.
|
|
|
848
|
|
|
849 SYMVAL_CONST_CURRENT_BUFFER_FORWARD:
|
|
|
850 (declare with DEFVAR_CONST_BUFFER_LOCAL)
|
|
|
851 Same as SYMVAL_CURRENT_BUFFER_FORWARD except that the
|
|
|
852 value cannot be set.
|
|
|
853
|
|
|
854 SYMVAL_DEFAULT_BUFFER_FORWARD:
|
|
|
855 (declare with DEFVAR_BUFFER_DEFAULTS)
|
|
|
856 This is used for the Lisp variables that contain the
|
|
|
857 default values of built-in buffer-local variables. Setting
|
|
|
858 or referencing one of these variables forwards into a slot
|
|
|
859 in the special struct buffer Vbuffer_defaults.
|
|
|
860
|
|
|
861 SYMVAL_UNBOUND_MARKER:
|
|
|
862 This is used for only one object, Qunbound.
|
|
|
863
|
|
|
864 SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
865 (declare with DEFVAR_CONSOLE_LOCAL)
|
|
|
866 This is used for built-in console-local variables -- i.e.
|
|
|
867 Lisp variables whose value is stored in the "struct console".
|
|
|
868 These work just like built-in buffer-local variables.
|
|
|
869 However, calling `make-local-variable' or
|
|
|
870 `make-variable-buffer-local' on one of these variables
|
|
|
871 is currently disallowed because that would entail having
|
|
|
872 both console-local and buffer-local variables, which is
|
|
|
873 trickier to implement.
|
|
|
874
|
|
|
875 SYMVAL_CONST_SELECTED_CONSOLE_FORWARD:
|
|
|
876 (declare with DEFVAR_CONST_CONSOLE_LOCAL)
|
|
|
877 Same as SYMVAL_SELECTED_CONSOLE_FORWARD except that the
|
|
|
878 value cannot be set.
|
|
|
879
|
|
|
880 SYMVAL_DEFAULT_CONSOLE_FORWARD:
|
|
|
881 (declare with DEFVAR_CONSOLE_DEFAULTS)
|
|
|
882 This is used for the Lisp variables that contain the
|
|
|
883 default values of built-in console-local variables. Setting
|
|
|
884 or referencing one of these variables forwards into a slot
|
|
|
885 in the special struct console Vconsole_defaults.
|
|
|
886
|
|
|
887
|
|
|
888 2. symbol-value-buffer-local
|
|
|
889
|
|
|
890 symbol-value-buffer-local is used for variables that have had
|
|
|
891 `make-local-variable' or `make-variable-buffer-local' applied
|
|
|
892 to them. This object contains an alist mapping buffers to
|
|
|
893 values. In addition, the object contains a "current value",
|
|
|
894 which is the value in some buffer. Whenever you access the
|
|
|
895 variable with `symbol-value' or set it with `set' or `setq',
|
|
|
896 things are switched around so that the "current value"
|
|
|
897 refers to the current buffer, if it wasn't already. This
|
|
|
898 way, repeated references to a variable in the same buffer
|
|
|
899 are almost as efficient as if the variable weren't buffer
|
|
|
900 local. Note that the alist may not be up-to-date w.r.t.
|
|
|
901 the buffer whose value is current, as the "current value"
|
|
|
902 cache is normally only flushed into the alist when the
|
|
|
903 buffer it refers to changes.
|
|
|
904
|
|
|
905 Note also that it is possible for `make-local-variable'
|
|
|
906 or `make-variable-buffer-local' to be called on a variable
|
|
|
907 that forwards into a C variable (i.e. a variable whose
|
|
|
908 value cell is a symbol-value-forward). In this case,
|
|
|
909 the value cell becomes a symbol-value-buffer-local (as
|
|
|
910 always), and the symbol-value-forward moves into
|
|
|
911 the "current value" cell in this object. Also, in
|
|
|
912 this case the "current value" *always* refers to the
|
|
|
913 current buffer, so that the values of the C variable
|
|
|
914 always is the correct value for the current buffer.
|
|
|
915 set_buffer_internal() automatically updates the current-value
|
|
|
916 cells of all buffer-local variables that forward into C
|
|
|
917 variables. (There is a list of all buffer-local variables
|
|
|
918 that is maintained for this and other purposes.)
|
|
|
919
|
|
|
920 Note that only certain types of `symbol-value-forward' objects
|
|
|
921 can find their way into the "current value" cell of a
|
|
|
922 `symbol-value-buffer-local' object: SYMVAL_OBJECT_FORWARD,
|
|
|
923 SYMVAL_FIXNUM_FORWARD, SYMVAL_BOOLEAN_FORWARD, and
|
|
|
924 SYMVAL_UNBOUND_MARKER. The SYMVAL_CONST_*_FORWARD cannot
|
|
|
925 be buffer-local because they are unsettable;
|
|
|
926 SYMVAL_DEFAULT_*_FORWARD cannot be buffer-local because that
|
|
|
927 makes no sense; making SYMVAL_CURRENT_BUFFER_FORWARD buffer-local
|
|
|
928 does not have much of an effect (it's already buffer-local); and
|
|
|
929 SYMVAL_SELECTED_CONSOLE_FORWARD cannot be buffer-local because
|
|
|
930 that's not currently implemented.
|
|
|
931
|
|
|
932
|
|
|
933 3. symbol-value-varalias
|
|
|
934
|
|
|
935 A symbol-value-varalias object is used for variables that
|
|
|
936 are aliases for other variables. This object contains
|
|
|
937 the symbol that this variable is aliased to.
|
|
|
938 symbol-value-varalias objects cannot occur anywhere within
|
|
|
939 a symbol-value-buffer-local object, and most of the
|
|
|
940 low-level functions below do not accept them; you need
|
|
|
941 to call follow_varalias_pointers to get the actual
|
|
|
942 symbol to operate on. */
|
|
|
943
|
|
|
944 static Lisp_Object
|
|
|
945 mark_symbol_value_buffer_local (Lisp_Object obj)
|
|
|
946 {
|
|
|
947 struct symbol_value_buffer_local *bfwd;
|
|
|
948
|
|
800
|
949 #ifdef ERROR_CHECK_TYPES
|
|
428
|
950 assert (XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_BUFFER_LOCAL ||
|
|
|
951 XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_SOME_BUFFER_LOCAL);
|
|
|
952 #endif
|
|
|
953
|
|
|
954 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (obj);
|
|
|
955 mark_object (bfwd->default_value);
|
|
|
956 mark_object (bfwd->current_value);
|
|
|
957 mark_object (bfwd->current_buffer);
|
|
|
958 return bfwd->current_alist_element;
|
|
|
959 }
|
|
|
960
|
|
|
961 static Lisp_Object
|
|
|
962 mark_symbol_value_lisp_magic (Lisp_Object obj)
|
|
|
963 {
|
|
|
964 struct symbol_value_lisp_magic *bfwd;
|
|
|
965 int i;
|
|
|
966
|
|
|
967 assert (XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_LISP_MAGIC);
|
|
|
968
|
|
|
969 bfwd = XSYMBOL_VALUE_LISP_MAGIC (obj);
|
|
|
970 for (i = 0; i < MAGIC_HANDLER_MAX; i++)
|
|
|
971 {
|
|
|
972 mark_object (bfwd->handler[i]);
|
|
|
973 mark_object (bfwd->harg[i]);
|
|
|
974 }
|
|
|
975 return bfwd->shadowed;
|
|
|
976 }
|
|
|
977
|
|
|
978 static Lisp_Object
|
|
|
979 mark_symbol_value_varalias (Lisp_Object obj)
|
|
|
980 {
|
|
|
981 struct symbol_value_varalias *bfwd;
|
|
|
982
|
|
|
983 assert (XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_VARALIAS);
|
|
|
984
|
|
|
985 bfwd = XSYMBOL_VALUE_VARALIAS (obj);
|
|
|
986 mark_object (bfwd->shadowed);
|
|
|
987 return bfwd->aliasee;
|
|
|
988 }
|
|
|
989
|
|
|
990 /* Should never, ever be called. (except by an external debugger) */
|
|
|
991 void
|
|
|
992 print_symbol_value_magic (Lisp_Object obj,
|
|
|
993 Lisp_Object printcharfun, int escapeflag)
|
|
|
994 {
|
|
800
|
995 write_fmt_string (printcharfun,
|
|
|
996 "#<INTERNAL OBJECT (XEmacs bug?) (%s type %d) 0x%lx>",
|
|
|
997 XRECORD_LHEADER_IMPLEMENTATION (obj)->name,
|
|
|
998 XSYMBOL_VALUE_MAGIC_TYPE (obj),
|
|
|
999 (long) XPNTR (obj));
|
|
428
|
1000 }
|
|
|
1001
|
|
|
1002 static const struct lrecord_description symbol_value_forward_description[] = {
|
|
|
1003 { XD_END }
|
|
|
1004 };
|
|
|
1005
|
|
|
1006 static const struct lrecord_description symbol_value_buffer_local_description[] = {
|
|
446
|
1007 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, default_value) },
|
|
|
1008 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, current_value) },
|
|
|
1009 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, current_buffer) },
|
|
|
1010 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, current_alist_element) },
|
|
428
|
1011 { XD_END }
|
|
|
1012 };
|
|
|
1013
|
|
|
1014 static const struct lrecord_description symbol_value_lisp_magic_description[] = {
|
|
440
|
1015 { XD_LISP_OBJECT_ARRAY, offsetof (struct symbol_value_lisp_magic, handler), 2*MAGIC_HANDLER_MAX+1 },
|
|
428
|
1016 { XD_END }
|
|
|
1017 };
|
|
|
1018
|
|
|
1019 static const struct lrecord_description symbol_value_varalias_description[] = {
|
|
440
|
1020 { XD_LISP_OBJECT, offsetof (struct symbol_value_varalias, aliasee) },
|
|
|
1021 { XD_LISP_OBJECT, offsetof (struct symbol_value_varalias, shadowed) },
|
|
428
|
1022 { XD_END }
|
|
|
1023 };
|
|
|
1024
|
|
934
|
1025 #ifdef USE_KKCC
|
|
|
1026 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-forward",
|
|
|
1027 symbol_value_forward,
|
|
|
1028 1, /*dumpable-flag*/
|
|
|
1029 0,
|
|
|
1030 print_symbol_value_magic, 0, 0, 0,
|
|
|
1031 symbol_value_forward_description,
|
|
|
1032 struct symbol_value_forward);
|
|
|
1033
|
|
|
1034 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-buffer-local",
|
|
|
1035 symbol_value_buffer_local,
|
|
|
1036 1, /*dumpable-flag*/
|
|
|
1037 mark_symbol_value_buffer_local,
|
|
|
1038 print_symbol_value_magic, 0, 0, 0,
|
|
|
1039 symbol_value_buffer_local_description,
|
|
|
1040 struct symbol_value_buffer_local);
|
|
|
1041
|
|
|
1042 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-lisp-magic",
|
|
|
1043 symbol_value_lisp_magic,
|
|
|
1044 1, /*dumpable-flag*/
|
|
|
1045 mark_symbol_value_lisp_magic,
|
|
|
1046 print_symbol_value_magic, 0, 0, 0,
|
|
|
1047 symbol_value_lisp_magic_description,
|
|
|
1048 struct symbol_value_lisp_magic);
|
|
|
1049
|
|
|
1050 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-varalias",
|
|
|
1051 symbol_value_varalias,
|
|
|
1052 1, /*dumpable-flag*/
|
|
|
1053 mark_symbol_value_varalias,
|
|
|
1054 print_symbol_value_magic, 0, 0, 0,
|
|
|
1055 symbol_value_varalias_description,
|
|
|
1056 struct symbol_value_varalias);
|
|
|
1057
|
|
|
1058 #else /* not USE_KKCC */
|
|
|
1059
|
|
428
|
1060 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-forward",
|
|
|
1061 symbol_value_forward,
|
|
442
|
1062 0,
|
|
428
|
1063 print_symbol_value_magic, 0, 0, 0,
|
|
|
1064 symbol_value_forward_description,
|
|
|
1065 struct symbol_value_forward);
|
|
|
1066
|
|
|
1067 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-buffer-local",
|
|
|
1068 symbol_value_buffer_local,
|
|
|
1069 mark_symbol_value_buffer_local,
|
|
|
1070 print_symbol_value_magic, 0, 0, 0,
|
|
|
1071 symbol_value_buffer_local_description,
|
|
|
1072 struct symbol_value_buffer_local);
|
|
|
1073
|
|
|
1074 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-lisp-magic",
|
|
|
1075 symbol_value_lisp_magic,
|
|
|
1076 mark_symbol_value_lisp_magic,
|
|
|
1077 print_symbol_value_magic, 0, 0, 0,
|
|
|
1078 symbol_value_lisp_magic_description,
|
|
|
1079 struct symbol_value_lisp_magic);
|
|
|
1080
|
|
|
1081 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-varalias",
|
|
|
1082 symbol_value_varalias,
|
|
|
1083 mark_symbol_value_varalias,
|
|
|
1084 print_symbol_value_magic, 0, 0, 0,
|
|
|
1085 symbol_value_varalias_description,
|
|
|
1086 struct symbol_value_varalias);
|
|
934
|
1087 #endif /* not USE_KKCC */
|
|
428
|
1088
|
|
|
1089 /* Getting and setting values of symbols */
|
|
|
1090
|
|
|
1091 /* Given the raw contents of a symbol value cell, return the Lisp value of
|
|
|
1092 the symbol. However, VALCONTENTS cannot be a symbol-value-buffer-local,
|
|
|
1093 symbol-value-lisp-magic, or symbol-value-varalias.
|
|
|
1094
|
|
|
1095 BUFFER specifies a buffer, and is used for built-in buffer-local
|
|
|
1096 variables, which are of type SYMVAL_CURRENT_BUFFER_FORWARD.
|
|
|
1097 Note that such variables are never encapsulated in a
|
|
|
1098 symbol-value-buffer-local structure.
|
|
|
1099
|
|
|
1100 CONSOLE specifies a console, and is used for built-in console-local
|
|
|
1101 variables, which are of type SYMVAL_SELECTED_CONSOLE_FORWARD.
|
|
|
1102 Note that such variables are (currently) never encapsulated in a
|
|
|
1103 symbol-value-buffer-local structure.
|
|
|
1104 */
|
|
|
1105
|
|
|
1106 static Lisp_Object
|
|
|
1107 do_symval_forwarding (Lisp_Object valcontents, struct buffer *buffer,
|
|
|
1108 struct console *console)
|
|
|
1109 {
|
|
442
|
1110 const struct symbol_value_forward *fwd;
|
|
428
|
1111
|
|
|
1112 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
1113 return valcontents;
|
|
|
1114
|
|
|
1115 fwd = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
1116 switch (fwd->magic.type)
|
|
|
1117 {
|
|
|
1118 case SYMVAL_FIXNUM_FORWARD:
|
|
|
1119 case SYMVAL_CONST_FIXNUM_FORWARD:
|
|
458
|
1120 return make_int (*((Fixnum *)symbol_value_forward_forward (fwd)));
|
|
428
|
1121
|
|
|
1122 case SYMVAL_BOOLEAN_FORWARD:
|
|
|
1123 case SYMVAL_CONST_BOOLEAN_FORWARD:
|
|
|
1124 return *((int *)symbol_value_forward_forward (fwd)) ? Qt : Qnil;
|
|
|
1125
|
|
|
1126 case SYMVAL_OBJECT_FORWARD:
|
|
|
1127 case SYMVAL_CONST_OBJECT_FORWARD:
|
|
|
1128 case SYMVAL_CONST_SPECIFIER_FORWARD:
|
|
|
1129 return *((Lisp_Object *)symbol_value_forward_forward (fwd));
|
|
|
1130
|
|
|
1131 case SYMVAL_DEFAULT_BUFFER_FORWARD:
|
|
|
1132 return (*((Lisp_Object *)((char *) XBUFFER (Vbuffer_defaults)
|
|
|
1133 + ((char *)symbol_value_forward_forward (fwd)
|
|
|
1134 - (char *)&buffer_local_flags))));
|
|
|
1135
|
|
|
1136
|
|
|
1137 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
1138 case SYMVAL_CONST_CURRENT_BUFFER_FORWARD:
|
|
|
1139 assert (buffer);
|
|
|
1140 return (*((Lisp_Object *)((char *)buffer
|
|
|
1141 + ((char *)symbol_value_forward_forward (fwd)
|
|
|
1142 - (char *)&buffer_local_flags))));
|
|
|
1143
|
|
|
1144 case SYMVAL_DEFAULT_CONSOLE_FORWARD:
|
|
|
1145 return (*((Lisp_Object *)((char *) XCONSOLE (Vconsole_defaults)
|
|
|
1146 + ((char *)symbol_value_forward_forward (fwd)
|
|
|
1147 - (char *)&console_local_flags))));
|
|
|
1148
|
|
|
1149 case SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
1150 case SYMVAL_CONST_SELECTED_CONSOLE_FORWARD:
|
|
|
1151 assert (console);
|
|
|
1152 return (*((Lisp_Object *)((char *)console
|
|
|
1153 + ((char *)symbol_value_forward_forward (fwd)
|
|
|
1154 - (char *)&console_local_flags))));
|
|
|
1155
|
|
|
1156 case SYMVAL_UNBOUND_MARKER:
|
|
|
1157 return valcontents;
|
|
|
1158
|
|
|
1159 default:
|
|
|
1160 abort ();
|
|
|
1161 }
|
|
|
1162 return Qnil; /* suppress compiler warning */
|
|
|
1163 }
|
|
|
1164
|
|
|
1165 /* Set the value of default-buffer-local variable SYM to VALUE. */
|
|
|
1166
|
|
|
1167 static void
|
|
|
1168 set_default_buffer_slot_variable (Lisp_Object sym,
|
|
|
1169 Lisp_Object value)
|
|
|
1170 {
|
|
|
1171 /* Handle variables like case-fold-search that have special slots in
|
|
|
1172 the buffer. Make them work apparently like buffer_local variables.
|
|
|
1173 */
|
|
|
1174 /* At this point, the value cell may not contain a symbol-value-varalias
|
|
|
1175 or symbol-value-buffer-local, and if there's a handler, we should
|
|
|
1176 have already called it. */
|
|
|
1177 Lisp_Object valcontents = fetch_value_maybe_past_magic (sym, Qt);
|
|
442
|
1178 const struct symbol_value_forward *fwd
|
|
428
|
1179 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
1180 int offset = ((char *) symbol_value_forward_forward (fwd)
|
|
|
1181 - (char *) &buffer_local_flags);
|
|
|
1182 int mask = XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd)));
|
|
|
1183 int (*magicfun) (Lisp_Object simm, Lisp_Object *val, Lisp_Object in_object,
|
|
|
1184 int flags) = symbol_value_forward_magicfun (fwd);
|
|
|
1185
|
|
|
1186 *((Lisp_Object *) (offset + (char *) XBUFFER (Vbuffer_defaults)))
|
|
|
1187 = value;
|
|
|
1188
|
|
|
1189 if (mask > 0) /* Not always per-buffer */
|
|
|
1190 {
|
|
|
1191 /* Set value in each buffer which hasn't shadowed the default */
|
|
|
1192 LIST_LOOP_2 (elt, Vbuffer_alist)
|
|
|
1193 {
|
|
|
1194 struct buffer *b = XBUFFER (XCDR (elt));
|
|
|
1195 if (!(b->local_var_flags & mask))
|
|
|
1196 {
|
|
|
1197 if (magicfun)
|
|
771
|
1198 magicfun (sym, &value, wrap_buffer (b), 0);
|
|
428
|
1199 *((Lisp_Object *) (offset + (char *) b)) = value;
|
|
|
1200 }
|
|
|
1201 }
|
|
|
1202 }
|
|
|
1203 }
|
|
|
1204
|
|
|
1205 /* Set the value of default-console-local variable SYM to VALUE. */
|
|
|
1206
|
|
|
1207 static void
|
|
|
1208 set_default_console_slot_variable (Lisp_Object sym,
|
|
|
1209 Lisp_Object value)
|
|
|
1210 {
|
|
|
1211 /* Handle variables like case-fold-search that have special slots in
|
|
|
1212 the console. Make them work apparently like console_local variables.
|
|
|
1213 */
|
|
|
1214 /* At this point, the value cell may not contain a symbol-value-varalias
|
|
|
1215 or symbol-value-buffer-local, and if there's a handler, we should
|
|
|
1216 have already called it. */
|
|
|
1217 Lisp_Object valcontents = fetch_value_maybe_past_magic (sym, Qt);
|
|
442
|
1218 const struct symbol_value_forward *fwd
|
|
428
|
1219 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
1220 int offset = ((char *) symbol_value_forward_forward (fwd)
|
|
|
1221 - (char *) &console_local_flags);
|
|
|
1222 int mask = XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd)));
|
|
|
1223 int (*magicfun) (Lisp_Object simm, Lisp_Object *val, Lisp_Object in_object,
|
|
|
1224 int flags) = symbol_value_forward_magicfun (fwd);
|
|
|
1225
|
|
|
1226 *((Lisp_Object *) (offset + (char *) XCONSOLE (Vconsole_defaults)))
|
|
|
1227 = value;
|
|
|
1228
|
|
|
1229 if (mask > 0) /* Not always per-console */
|
|
|
1230 {
|
|
|
1231 /* Set value in each console which hasn't shadowed the default */
|
|
|
1232 LIST_LOOP_2 (console, Vconsole_list)
|
|
|
1233 {
|
|
|
1234 struct console *d = XCONSOLE (console);
|
|
|
1235 if (!(d->local_var_flags & mask))
|
|
|
1236 {
|
|
|
1237 if (magicfun)
|
|
|
1238 magicfun (sym, &value, console, 0);
|
|
|
1239 *((Lisp_Object *) (offset + (char *) d)) = value;
|
|
|
1240 }
|
|
|
1241 }
|
|
|
1242 }
|
|
|
1243 }
|
|
|
1244
|
|
|
1245 /* Store NEWVAL into SYM.
|
|
|
1246
|
|
|
1247 SYM's value slot may *not* be types (5) or (6) above,
|
|
|
1248 i.e. no symbol-value-varalias objects. (You should have
|
|
|
1249 forwarded past all of these.)
|
|
|
1250
|
|
|
1251 SYM should not be an unsettable symbol or a symbol with
|
|
|
1252 a magic `set-value' handler (unless you want to explicitly
|
|
|
1253 ignore this handler).
|
|
|
1254
|
|
|
1255 OVALUE is the current value of SYM, but forwarded past any
|
|
|
1256 symbol-value-buffer-local and symbol-value-lisp-magic objects.
|
|
|
1257 (i.e. if SYM is a symbol-value-buffer-local, OVALUE should be
|
|
|
1258 the contents of its current-value cell.) NEWVAL may only be
|
|
|
1259 a simple value or Qunbound. If SYM is a symbol-value-buffer-local,
|
|
|
1260 this function will only modify its current-value cell, which should
|
|
|
1261 already be set up to point to the current buffer.
|
|
|
1262 */
|
|
|
1263
|
|
|
1264 static void
|
|
|
1265 store_symval_forwarding (Lisp_Object sym, Lisp_Object ovalue,
|
|
|
1266 Lisp_Object newval)
|
|
|
1267 {
|
|
|
1268 if (!SYMBOL_VALUE_MAGIC_P (ovalue) || UNBOUNDP (ovalue))
|
|
|
1269 {
|
|
|
1270 Lisp_Object *store_pointer = value_slot_past_magic (sym);
|
|
|
1271
|
|
|
1272 if (SYMBOL_VALUE_BUFFER_LOCAL_P (*store_pointer))
|
|
|
1273 store_pointer =
|
|
|
1274 &XSYMBOL_VALUE_BUFFER_LOCAL (*store_pointer)->current_value;
|
|
|
1275
|
|
|
1276 assert (UNBOUNDP (*store_pointer)
|
|
|
1277 || !SYMBOL_VALUE_MAGIC_P (*store_pointer));
|
|
|
1278 *store_pointer = newval;
|
|
|
1279 }
|
|
|
1280 else
|
|
|
1281 {
|
|
442
|
1282 const struct symbol_value_forward *fwd = XSYMBOL_VALUE_FORWARD (ovalue);
|
|
428
|
1283 int (*magicfun) (Lisp_Object simm, Lisp_Object *val,
|
|
|
1284 Lisp_Object in_object, int flags)
|
|
|
1285 = symbol_value_forward_magicfun (fwd);
|
|
|
1286
|
|
|
1287 switch (XSYMBOL_VALUE_MAGIC_TYPE (ovalue))
|
|
|
1288 {
|
|
|
1289 case SYMVAL_FIXNUM_FORWARD:
|
|
|
1290 CHECK_INT (newval);
|
|
|
1291 if (magicfun)
|
|
|
1292 magicfun (sym, &newval, Qnil, 0);
|
|
458
|
1293 *((Fixnum *) symbol_value_forward_forward (fwd)) = XINT (newval);
|
|
428
|
1294 return;
|
|
|
1295
|
|
|
1296 case SYMVAL_BOOLEAN_FORWARD:
|
|
|
1297 if (magicfun)
|
|
|
1298 magicfun (sym, &newval, Qnil, 0);
|
|
|
1299 *((int *) symbol_value_forward_forward (fwd))
|
|
|
1300 = !NILP (newval);
|
|
|
1301 return;
|
|
|
1302
|
|
|
1303 case SYMVAL_OBJECT_FORWARD:
|
|
|
1304 if (magicfun)
|
|
|
1305 magicfun (sym, &newval, Qnil, 0);
|
|
|
1306 *((Lisp_Object *) symbol_value_forward_forward (fwd)) = newval;
|
|
|
1307 return;
|
|
|
1308
|
|
|
1309 case SYMVAL_DEFAULT_BUFFER_FORWARD:
|
|
|
1310 set_default_buffer_slot_variable (sym, newval);
|
|
|
1311 return;
|
|
|
1312
|
|
|
1313 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
1314 if (magicfun)
|
|
771
|
1315 magicfun (sym, &newval, wrap_buffer (current_buffer), 0);
|
|
428
|
1316 *((Lisp_Object *) ((char *) current_buffer
|
|
|
1317 + ((char *) symbol_value_forward_forward (fwd)
|
|
|
1318 - (char *) &buffer_local_flags)))
|
|
|
1319 = newval;
|
|
|
1320 return;
|
|
|
1321
|
|
|
1322 case SYMVAL_DEFAULT_CONSOLE_FORWARD:
|
|
|
1323 set_default_console_slot_variable (sym, newval);
|
|
|
1324 return;
|
|
|
1325
|
|
|
1326 case SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
1327 if (magicfun)
|
|
|
1328 magicfun (sym, &newval, Vselected_console, 0);
|
|
|
1329 *((Lisp_Object *) ((char *) XCONSOLE (Vselected_console)
|
|
|
1330 + ((char *) symbol_value_forward_forward (fwd)
|
|
|
1331 - (char *) &console_local_flags)))
|
|
|
1332 = newval;
|
|
|
1333 return;
|
|
|
1334
|
|
|
1335 default:
|
|
|
1336 abort ();
|
|
|
1337 }
|
|
|
1338 }
|
|
|
1339 }
|
|
|
1340
|
|
|
1341 /* Given a per-buffer variable SYMBOL and its raw value-cell contents
|
|
|
1342 BFWD, locate and return a pointer to the element in BUFFER's
|
|
|
1343 local_var_alist for SYMBOL. The return value will be Qnil if
|
|
|
1344 BUFFER does not have its own value for SYMBOL (i.e. the default
|
|
|
1345 value is seen in that buffer).
|
|
|
1346 */
|
|
|
1347
|
|
|
1348 static Lisp_Object
|
|
|
1349 buffer_local_alist_element (struct buffer *buffer, Lisp_Object symbol,
|
|
|
1350 struct symbol_value_buffer_local *bfwd)
|
|
|
1351 {
|
|
|
1352 if (!NILP (bfwd->current_buffer) &&
|
|
|
1353 XBUFFER (bfwd->current_buffer) == buffer)
|
|
|
1354 /* This is just an optimization of the below. */
|
|
|
1355 return bfwd->current_alist_element;
|
|
|
1356 else
|
|
|
1357 return assq_no_quit (symbol, buffer->local_var_alist);
|
|
|
1358 }
|
|
|
1359
|
|
|
1360 /* [Remember that the slot that mirrors CURRENT-VALUE in the
|
|
|
1361 symbol-value-buffer-local of a per-buffer variable -- i.e. the
|
|
|
1362 slot in CURRENT-BUFFER's local_var_alist, or the DEFAULT-VALUE
|
|
|
1363 slot -- may be out of date.]
|
|
|
1364
|
|
|
1365 Write out any cached value in buffer-local variable SYMBOL's
|
|
|
1366 buffer-local structure, which is passed in as BFWD.
|
|
|
1367 */
|
|
|
1368
|
|
|
1369 static void
|
|
|
1370 write_out_buffer_local_cache (Lisp_Object symbol,
|
|
|
1371 struct symbol_value_buffer_local *bfwd)
|
|
|
1372 {
|
|
|
1373 if (!NILP (bfwd->current_buffer))
|
|
|
1374 {
|
|
|
1375 /* We pass 0 for BUFFER because only SYMVAL_CURRENT_BUFFER_FORWARD
|
|
|
1376 uses it, and that type cannot be inside a symbol-value-buffer-local */
|
|
|
1377 Lisp_Object cval = do_symval_forwarding (bfwd->current_value, 0, 0);
|
|
|
1378 if (NILP (bfwd->current_alist_element))
|
|
|
1379 /* current_value may be updated more recently than default_value */
|
|
|
1380 bfwd->default_value = cval;
|
|
|
1381 else
|
|
|
1382 Fsetcdr (bfwd->current_alist_element, cval);
|
|
|
1383 }
|
|
|
1384 }
|
|
|
1385
|
|
|
1386 /* SYM is a buffer-local variable, and BFWD is its buffer-local structure.
|
|
|
1387 Set up BFWD's cache for validity in buffer BUF. This assumes that
|
|
|
1388 the cache is currently in a consistent state (this can include
|
|
|
1389 not having any value cached, if BFWD->CURRENT_BUFFER is nil).
|
|
|
1390
|
|
|
1391 If the cache is already set up for BUF, this function does nothing
|
|
|
1392 at all.
|
|
|
1393
|
|
|
1394 Otherwise, if SYM forwards out to a C variable, this also forwards
|
|
|
1395 SYM's value in BUF out to the variable. Therefore, you generally
|
|
|
1396 only want to call this when BUF is, or is about to become, the
|
|
|
1397 current buffer.
|
|
|
1398
|
|
|
1399 (Otherwise, you can just retrieve the value without changing the
|
|
|
1400 cache, at the expense of slower retrieval.)
|
|
|
1401 */
|
|
|
1402
|
|
|
1403 static void
|
|
|
1404 set_up_buffer_local_cache (Lisp_Object sym,
|
|
|
1405 struct symbol_value_buffer_local *bfwd,
|
|
|
1406 struct buffer *buf,
|
|
|
1407 Lisp_Object new_alist_el,
|
|
|
1408 int set_it_p)
|
|
|
1409 {
|
|
|
1410 Lisp_Object new_val;
|
|
|
1411
|
|
|
1412 if (!NILP (bfwd->current_buffer)
|
|
|
1413 && buf == XBUFFER (bfwd->current_buffer))
|
|
|
1414 /* Cache is already set up. */
|
|
|
1415 return;
|
|
|
1416
|
|
|
1417 /* Flush out the old cache. */
|
|
|
1418 write_out_buffer_local_cache (sym, bfwd);
|
|
|
1419
|
|
|
1420 /* Retrieve the new alist element and new value. */
|
|
|
1421 if (NILP (new_alist_el)
|
|
|
1422 && set_it_p)
|
|
|
1423 new_alist_el = buffer_local_alist_element (buf, sym, bfwd);
|
|
|
1424
|
|
|
1425 if (NILP (new_alist_el))
|
|
|
1426 new_val = bfwd->default_value;
|
|
|
1427 else
|
|
|
1428 new_val = Fcdr (new_alist_el);
|
|
|
1429
|
|
|
1430 bfwd->current_alist_element = new_alist_el;
|
|
793
|
1431 bfwd->current_buffer = wrap_buffer (buf);
|
|
428
|
1432
|
|
|
1433 /* Now store the value into the current-value slot.
|
|
|
1434 We don't simply write it there, because the current-value
|
|
|
1435 slot might be a forwarding pointer, in which case we need
|
|
|
1436 to instead write the value into the C variable.
|
|
|
1437
|
|
|
1438 We might also want to call a magic function.
|
|
|
1439
|
|
|
1440 So instead, we call this function. */
|
|
|
1441 store_symval_forwarding (sym, bfwd->current_value, new_val);
|
|
|
1442 }
|
|
|
1443
|
|
446
|
1444
|
|
|
1445 /* SYM is a buffer-local variable, and BFWD is its buffer-local structure.
|
|
|
1446 Flush the cache. BFWD->CURRENT_BUFFER will be nil after this operation.
|
|
|
1447 */
|
|
|
1448
|
|
|
1449 static void
|
|
|
1450 flush_buffer_local_cache (Lisp_Object sym,
|
|
|
1451 struct symbol_value_buffer_local *bfwd)
|
|
|
1452 {
|
|
|
1453 if (NILP (bfwd->current_buffer))
|
|
|
1454 /* Cache is already flushed. */
|
|
|
1455 return;
|
|
|
1456
|
|
|
1457 /* Flush out the old cache. */
|
|
|
1458 write_out_buffer_local_cache (sym, bfwd);
|
|
|
1459
|
|
|
1460 bfwd->current_alist_element = Qnil;
|
|
|
1461 bfwd->current_buffer = Qnil;
|
|
|
1462
|
|
|
1463 /* Now store default the value into the current-value slot.
|
|
|
1464 We don't simply write it there, because the current-value
|
|
|
1465 slot might be a forwarding pointer, in which case we need
|
|
|
1466 to instead write the value into the C variable.
|
|
|
1467
|
|
|
1468 We might also want to call a magic function.
|
|
|
1469
|
|
|
1470 So instead, we call this function. */
|
|
|
1471 store_symval_forwarding (sym, bfwd->current_value, bfwd->default_value);
|
|
|
1472 }
|
|
|
1473
|
|
|
1474 /* Flush all the buffer-local variable caches. Whoever has a
|
|
|
1475 non-interned buffer-local variable will be spanked. Whoever has a
|
|
|
1476 magic variable that interns or uninterns symbols... I don't even
|
|
|
1477 want to think about it.
|
|
|
1478 */
|
|
|
1479
|
|
|
1480 void
|
|
|
1481 flush_all_buffer_local_cache (void)
|
|
|
1482 {
|
|
|
1483 Lisp_Object *syms = XVECTOR_DATA (Vobarray);
|
|
|
1484 long count = XVECTOR_LENGTH (Vobarray);
|
|
|
1485 long i;
|
|
|
1486
|
|
|
1487 for (i=0; i<count; i++)
|
|
|
1488 {
|
|
|
1489 Lisp_Object sym = syms[i];
|
|
|
1490 Lisp_Object value;
|
|
|
1491
|
|
|
1492 if (!ZEROP (sym))
|
|
|
1493 for(;;)
|
|
|
1494 {
|
|
|
1495 Lisp_Symbol *next;
|
|
|
1496 assert (SYMBOLP (sym));
|
|
|
1497 value = fetch_value_maybe_past_magic (sym, Qt);
|
|
|
1498 if (SYMBOL_VALUE_BUFFER_LOCAL_P (value))
|
|
|
1499 flush_buffer_local_cache (sym, XSYMBOL_VALUE_BUFFER_LOCAL (value));
|
|
|
1500
|
|
|
1501 next = symbol_next (XSYMBOL (sym));
|
|
|
1502 if (!next)
|
|
|
1503 break;
|
|
793
|
1504 sym = wrap_symbol (next);
|
|
446
|
1505 }
|
|
|
1506 }
|
|
|
1507 }
|
|
|
1508
|
|
428
|
1509
|
|
|
1510 void
|
|
|
1511 kill_buffer_local_variables (struct buffer *buf)
|
|
|
1512 {
|
|
|
1513 Lisp_Object prev = Qnil;
|
|
|
1514 Lisp_Object alist;
|
|
|
1515
|
|
|
1516 /* Any which are supposed to be permanent,
|
|
|
1517 make local again, with the same values they had. */
|
|
|
1518
|
|
|
1519 for (alist = buf->local_var_alist; !NILP (alist); alist = XCDR (alist))
|
|
|
1520 {
|
|
|
1521 Lisp_Object sym = XCAR (XCAR (alist));
|
|
|
1522 struct symbol_value_buffer_local *bfwd;
|
|
|
1523 /* Variables with a symbol-value-varalias should not be here
|
|
|
1524 (we should have forwarded past them) and there must be a
|
|
|
1525 symbol-value-buffer-local. If there's a symbol-value-lisp-magic,
|
|
|
1526 just forward past it; if the variable has a handler, it was
|
|
|
1527 already called. */
|
|
|
1528 Lisp_Object value = fetch_value_maybe_past_magic (sym, Qt);
|
|
|
1529
|
|
|
1530 assert (SYMBOL_VALUE_BUFFER_LOCAL_P (value));
|
|
|
1531 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (value);
|
|
|
1532
|
|
|
1533 if (!NILP (Fget (sym, Qpermanent_local, Qnil)))
|
|
|
1534 /* prev points to the last alist element that is still
|
|
|
1535 staying around, so *only* update it now. This didn't
|
|
|
1536 used to be the case; this bug has been around since
|
|
|
1537 mly's rewrite two years ago! */
|
|
|
1538 prev = alist;
|
|
|
1539 else
|
|
|
1540 {
|
|
|
1541 /* Really truly kill it. */
|
|
|
1542 if (!NILP (prev))
|
|
|
1543 XCDR (prev) = XCDR (alist);
|
|
|
1544 else
|
|
|
1545 buf->local_var_alist = XCDR (alist);
|
|
|
1546
|
|
|
1547 /* We just effectively changed the value for this variable
|
|
|
1548 in BUF. So: */
|
|
|
1549
|
|
|
1550 /* (1) If the cache is caching BUF, invalidate the cache. */
|
|
|
1551 if (!NILP (bfwd->current_buffer) &&
|
|
|
1552 buf == XBUFFER (bfwd->current_buffer))
|
|
|
1553 bfwd->current_buffer = Qnil;
|
|
|
1554
|
|
|
1555 /* (2) If we changed the value in current_buffer and this
|
|
|
1556 variable forwards to a C variable, we need to change the
|
|
|
1557 value of the C variable. set_up_buffer_local_cache()
|
|
|
1558 will do this. It doesn't hurt to do it whenever
|
|
|
1559 BUF == current_buffer, so just go ahead and do that. */
|
|
|
1560 if (buf == current_buffer)
|
|
|
1561 set_up_buffer_local_cache (sym, bfwd, buf, Qnil, 0);
|
|
|
1562 }
|
|
|
1563 }
|
|
|
1564 }
|
|
|
1565
|
|
|
1566 static Lisp_Object
|
|
|
1567 find_symbol_value_1 (Lisp_Object sym, struct buffer *buf,
|
|
|
1568 struct console *con, int swap_it_in,
|
|
|
1569 Lisp_Object symcons, int set_it_p)
|
|
|
1570 {
|
|
|
1571 Lisp_Object valcontents;
|
|
|
1572
|
|
|
1573 retry:
|
|
|
1574 valcontents = XSYMBOL (sym)->value;
|
|
|
1575
|
|
|
1576 retry_2:
|
|
|
1577 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
1578 return valcontents;
|
|
|
1579
|
|
|
1580 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
1581 {
|
|
|
1582 case SYMVAL_LISP_MAGIC:
|
|
|
1583 /* #### kludge */
|
|
|
1584 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
1585 /* semi-change-o */
|
|
|
1586 goto retry_2;
|
|
|
1587
|
|
|
1588 case SYMVAL_VARALIAS:
|
|
|
1589 sym = follow_varalias_pointers (sym, Qt /* #### kludge */);
|
|
|
1590 symcons = Qnil;
|
|
|
1591 /* presto change-o! */
|
|
|
1592 goto retry;
|
|
|
1593
|
|
|
1594 case SYMVAL_BUFFER_LOCAL:
|
|
|
1595 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
1596 {
|
|
|
1597 struct symbol_value_buffer_local *bfwd
|
|
|
1598 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
1599
|
|
|
1600 if (swap_it_in)
|
|
|
1601 {
|
|
|
1602 set_up_buffer_local_cache (sym, bfwd, buf, symcons, set_it_p);
|
|
|
1603 valcontents = bfwd->current_value;
|
|
|
1604 }
|
|
|
1605 else
|
|
|
1606 {
|
|
|
1607 if (!NILP (bfwd->current_buffer) &&
|
|
|
1608 buf == XBUFFER (bfwd->current_buffer))
|
|
|
1609 valcontents = bfwd->current_value;
|
|
|
1610 else if (NILP (symcons))
|
|
|
1611 {
|
|
|
1612 if (set_it_p)
|
|
|
1613 valcontents = assq_no_quit (sym, buf->local_var_alist);
|
|
|
1614 if (NILP (valcontents))
|
|
|
1615 valcontents = bfwd->default_value;
|
|
|
1616 else
|
|
|
1617 valcontents = XCDR (valcontents);
|
|
|
1618 }
|
|
|
1619 else
|
|
|
1620 valcontents = XCDR (symcons);
|
|
|
1621 }
|
|
|
1622 break;
|
|
|
1623 }
|
|
|
1624
|
|
|
1625 default:
|
|
|
1626 break;
|
|
|
1627 }
|
|
|
1628 return do_symval_forwarding (valcontents, buf, con);
|
|
|
1629 }
|
|
|
1630
|
|
|
1631
|
|
|
1632 /* Find the value of a symbol in BUFFER, returning Qunbound if it's not
|
|
|
1633 bound. Note that it must not be possible to QUIT within this
|
|
|
1634 function. */
|
|
|
1635
|
|
|
1636 Lisp_Object
|
|
|
1637 symbol_value_in_buffer (Lisp_Object sym, Lisp_Object buffer)
|
|
|
1638 {
|
|
|
1639 struct buffer *buf;
|
|
|
1640
|
|
|
1641 CHECK_SYMBOL (sym);
|
|
|
1642
|
|
|
1643 if (NILP (buffer))
|
|
|
1644 buf = current_buffer;
|
|
|
1645 else
|
|
|
1646 {
|
|
|
1647 CHECK_BUFFER (buffer);
|
|
|
1648 buf = XBUFFER (buffer);
|
|
|
1649 }
|
|
|
1650
|
|
|
1651 return find_symbol_value_1 (sym, buf,
|
|
|
1652 /* If it bombs out at startup due to a
|
|
|
1653 Lisp error, this may be nil. */
|
|
|
1654 CONSOLEP (Vselected_console)
|
|
|
1655 ? XCONSOLE (Vselected_console) : 0, 0, Qnil, 1);
|
|
|
1656 }
|
|
|
1657
|
|
|
1658 static Lisp_Object
|
|
|
1659 symbol_value_in_console (Lisp_Object sym, Lisp_Object console)
|
|
|
1660 {
|
|
|
1661 CHECK_SYMBOL (sym);
|
|
|
1662
|
|
|
1663 if (NILP (console))
|
|
|
1664 console = Vselected_console;
|
|
|
1665 else
|
|
|
1666 CHECK_CONSOLE (console);
|
|
|
1667
|
|
|
1668 return find_symbol_value_1 (sym, current_buffer, XCONSOLE (console), 0,
|
|
|
1669 Qnil, 1);
|
|
|
1670 }
|
|
|
1671
|
|
|
1672 /* Return the current value of SYM. The difference between this function
|
|
|
1673 and calling symbol_value_in_buffer with a BUFFER of Qnil is that
|
|
|
1674 this updates the CURRENT_VALUE slot of buffer-local variables to
|
|
|
1675 point to the current buffer, while symbol_value_in_buffer doesn't. */
|
|
|
1676
|
|
|
1677 Lisp_Object
|
|
|
1678 find_symbol_value (Lisp_Object sym)
|
|
|
1679 {
|
|
|
1680 /* WARNING: This function can be called when current_buffer is 0
|
|
|
1681 and Vselected_console is Qnil, early in initialization. */
|
|
|
1682 struct console *con;
|
|
|
1683 Lisp_Object valcontents;
|
|
|
1684
|
|
|
1685 CHECK_SYMBOL (sym);
|
|
|
1686
|
|
|
1687 valcontents = XSYMBOL (sym)->value;
|
|
|
1688 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
1689 return valcontents;
|
|
|
1690
|
|
|
1691 if (CONSOLEP (Vselected_console))
|
|
|
1692 con = XCONSOLE (Vselected_console);
|
|
|
1693 else
|
|
|
1694 {
|
|
|
1695 /* This can also get called while we're preparing to shutdown.
|
|
|
1696 #### What should really happen in that case? Should we
|
|
|
1697 actually fix things so we can't get here in that case? */
|
|
|
1698 #ifndef PDUMP
|
|
|
1699 assert (!initialized || preparing_for_armageddon);
|
|
|
1700 #endif
|
|
|
1701 con = 0;
|
|
|
1702 }
|
|
|
1703
|
|
|
1704 return find_symbol_value_1 (sym, current_buffer, con, 1, Qnil, 1);
|
|
|
1705 }
|
|
|
1706
|
|
|
1707 /* This is an optimized function for quick lookup of buffer local symbols
|
|
|
1708 by avoiding O(n) search. This will work when either:
|
|
|
1709 a) We have already found the symbol e.g. by traversing local_var_alist.
|
|
|
1710 or
|
|
|
1711 b) We know that the symbol will not be found in the current buffer's
|
|
|
1712 list of local variables.
|
|
|
1713 In the former case, find_it_p is 1 and symbol_cons is the element from
|
|
|
1714 local_var_alist. In the latter case, find_it_p is 0 and symbol_cons
|
|
|
1715 is the symbol.
|
|
|
1716
|
|
|
1717 This function is called from set_buffer_internal which does both of these
|
|
|
1718 things. */
|
|
|
1719
|
|
|
1720 Lisp_Object
|
|
|
1721 find_symbol_value_quickly (Lisp_Object symbol_cons, int find_it_p)
|
|
|
1722 {
|
|
|
1723 /* WARNING: This function can be called when current_buffer is 0
|
|
|
1724 and Vselected_console is Qnil, early in initialization. */
|
|
|
1725 struct console *con;
|
|
|
1726 Lisp_Object sym = find_it_p ? XCAR (symbol_cons) : symbol_cons;
|
|
|
1727
|
|
|
1728 CHECK_SYMBOL (sym);
|
|
|
1729 if (CONSOLEP (Vselected_console))
|
|
|
1730 con = XCONSOLE (Vselected_console);
|
|
|
1731 else
|
|
|
1732 {
|
|
|
1733 /* This can also get called while we're preparing to shutdown.
|
|
|
1734 #### What should really happen in that case? Should we
|
|
|
1735 actually fix things so we can't get here in that case? */
|
|
|
1736 #ifndef PDUMP
|
|
|
1737 assert (!initialized || preparing_for_armageddon);
|
|
|
1738 #endif
|
|
|
1739 con = 0;
|
|
|
1740 }
|
|
|
1741
|
|
|
1742 return find_symbol_value_1 (sym, current_buffer, con, 1,
|
|
|
1743 find_it_p ? symbol_cons : Qnil,
|
|
|
1744 find_it_p);
|
|
|
1745 }
|
|
|
1746
|
|
|
1747 DEFUN ("symbol-value", Fsymbol_value, 1, 1, 0, /*
|
|
|
1748 Return SYMBOL's value. Error if that is void.
|
|
|
1749 */
|
|
|
1750 (symbol))
|
|
|
1751 {
|
|
|
1752 Lisp_Object val = find_symbol_value (symbol);
|
|
|
1753
|
|
|
1754 if (UNBOUNDP (val))
|
|
|
1755 return Fsignal (Qvoid_variable, list1 (symbol));
|
|
|
1756 else
|
|
|
1757 return val;
|
|
|
1758 }
|
|
|
1759
|
|
|
1760 DEFUN ("set", Fset, 2, 2, 0, /*
|
|
|
1761 Set SYMBOL's value to NEWVAL, and return NEWVAL.
|
|
|
1762 */
|
|
|
1763 (symbol, newval))
|
|
|
1764 {
|
|
|
1765 REGISTER Lisp_Object valcontents;
|
|
440
|
1766 Lisp_Symbol *sym;
|
|
428
|
1767 /* remember, we're called by Fmakunbound() as well */
|
|
|
1768
|
|
|
1769 CHECK_SYMBOL (symbol);
|
|
|
1770
|
|
|
1771 retry:
|
|
|
1772 sym = XSYMBOL (symbol);
|
|
|
1773 valcontents = sym->value;
|
|
|
1774
|
|
|
1775 if (EQ (symbol, Qnil) ||
|
|
|
1776 EQ (symbol, Qt) ||
|
|
|
1777 SYMBOL_IS_KEYWORD (symbol))
|
|
|
1778 reject_constant_symbols (symbol, newval, 0,
|
|
|
1779 UNBOUNDP (newval) ? Qmakunbound : Qset);
|
|
|
1780
|
|
|
1781 if (!SYMBOL_VALUE_MAGIC_P (valcontents) || UNBOUNDP (valcontents))
|
|
|
1782 {
|
|
|
1783 sym->value = newval;
|
|
|
1784 return newval;
|
|
|
1785 }
|
|
|
1786
|
|
|
1787 reject_constant_symbols (symbol, newval, 0,
|
|
|
1788 UNBOUNDP (newval) ? Qmakunbound : Qset);
|
|
|
1789
|
|
|
1790 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
1791 {
|
|
|
1792 case SYMVAL_LISP_MAGIC:
|
|
|
1793 {
|
|
|
1794 if (UNBOUNDP (newval))
|
|
440
|
1795 {
|
|
|
1796 maybe_call_magic_handler (symbol, Qmakunbound, 0);
|
|
|
1797 return XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed = Qunbound;
|
|
|
1798 }
|
|
428
|
1799 else
|
|
440
|
1800 {
|
|
|
1801 maybe_call_magic_handler (symbol, Qset, 1, newval);
|
|
|
1802 return XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed = newval;
|
|
|
1803 }
|
|
428
|
1804 }
|
|
|
1805
|
|
|
1806 case SYMVAL_VARALIAS:
|
|
|
1807 symbol = follow_varalias_pointers (symbol,
|
|
|
1808 UNBOUNDP (newval)
|
|
|
1809 ? Qmakunbound : Qset);
|
|
|
1810 /* presto change-o! */
|
|
|
1811 goto retry;
|
|
|
1812
|
|
|
1813 case SYMVAL_FIXNUM_FORWARD:
|
|
996
|
1814 case SYMVAL_CONST_FIXNUM_FORWARD:
|
|
428
|
1815 case SYMVAL_BOOLEAN_FORWARD:
|
|
996
|
1816 case SYMVAL_CONST_BOOLEAN_FORWARD:
|
|
428
|
1817 case SYMVAL_DEFAULT_BUFFER_FORWARD:
|
|
|
1818 case SYMVAL_DEFAULT_CONSOLE_FORWARD:
|
|
|
1819 if (UNBOUNDP (newval))
|
|
996
|
1820 {
|
|
|
1821 #ifdef HAVE_SHLIB
|
|
|
1822 if (unloading_module)
|
|
|
1823 {
|
|
|
1824 sym->value = newval;
|
|
|
1825 return newval;
|
|
|
1826 }
|
|
|
1827 else
|
|
|
1828 #endif
|
|
|
1829 invalid_change ("Cannot makunbound", symbol);
|
|
|
1830 }
|
|
|
1831 break;
|
|
|
1832
|
|
|
1833 case SYMVAL_OBJECT_FORWARD:
|
|
|
1834 case SYMVAL_CONST_OBJECT_FORWARD:
|
|
|
1835 if (UNBOUNDP (newval))
|
|
|
1836 {
|
|
|
1837 #ifdef HAVE_SHLIB
|
|
|
1838 if (unloading_module)
|
|
|
1839 {
|
|
|
1840 unstaticpro_nodump (symbol_value_forward_forward
|
|
|
1841 (XSYMBOL_VALUE_FORWARD (valcontents)));
|
|
|
1842 sym->value = newval;
|
|
|
1843 return newval;
|
|
|
1844 }
|
|
|
1845 else
|
|
|
1846 #endif
|
|
|
1847 invalid_change ("Cannot makunbound", symbol);
|
|
|
1848 }
|
|
428
|
1849 break;
|
|
|
1850
|
|
|
1851 /* case SYMVAL_UNBOUND_MARKER: break; */
|
|
|
1852
|
|
|
1853 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
1854 {
|
|
442
|
1855 const struct symbol_value_forward *fwd
|
|
428
|
1856 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
1857 int mask = XINT (*((Lisp_Object *)
|
|
|
1858 symbol_value_forward_forward (fwd)));
|
|
|
1859 if (mask > 0)
|
|
|
1860 /* Setting this variable makes it buffer-local */
|
|
|
1861 current_buffer->local_var_flags |= mask;
|
|
|
1862 break;
|
|
|
1863 }
|
|
|
1864
|
|
|
1865 case SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
1866 {
|
|
442
|
1867 const struct symbol_value_forward *fwd
|
|
428
|
1868 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
1869 int mask = XINT (*((Lisp_Object *)
|
|
|
1870 symbol_value_forward_forward (fwd)));
|
|
|
1871 if (mask > 0)
|
|
|
1872 /* Setting this variable makes it console-local */
|
|
|
1873 XCONSOLE (Vselected_console)->local_var_flags |= mask;
|
|
|
1874 break;
|
|
|
1875 }
|
|
|
1876
|
|
|
1877 case SYMVAL_BUFFER_LOCAL:
|
|
|
1878 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
1879 {
|
|
|
1880 /* If we want to examine or set the value and
|
|
|
1881 CURRENT-BUFFER is current, we just examine or set
|
|
|
1882 CURRENT-VALUE. If CURRENT-BUFFER is not current, we
|
|
|
1883 store the current CURRENT-VALUE value into
|
|
|
1884 CURRENT-ALIST- ELEMENT, then find the appropriate alist
|
|
|
1885 element for the buffer now current and set up
|
|
|
1886 CURRENT-ALIST-ELEMENT. Then we set CURRENT-VALUE out
|
|
|
1887 of that element, and store into CURRENT-BUFFER.
|
|
|
1888
|
|
|
1889 If we are setting the variable and the current buffer does
|
|
|
1890 not have an alist entry for this variable, an alist entry is
|
|
|
1891 created.
|
|
|
1892
|
|
|
1893 Note that CURRENT-VALUE can be a forwarding pointer.
|
|
|
1894 Each time it is examined or set, forwarding must be
|
|
|
1895 done. */
|
|
|
1896 struct symbol_value_buffer_local *bfwd
|
|
|
1897 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
1898 int some_buffer_local_p =
|
|
|
1899 (bfwd->magic.type == SYMVAL_SOME_BUFFER_LOCAL);
|
|
|
1900 /* What value are we caching right now? */
|
|
|
1901 Lisp_Object aelt = bfwd->current_alist_element;
|
|
|
1902
|
|
|
1903 if (!NILP (bfwd->current_buffer) &&
|
|
|
1904 current_buffer == XBUFFER (bfwd->current_buffer)
|
|
|
1905 && ((some_buffer_local_p)
|
|
|
1906 ? 1 /* doesn't automatically become local */
|
|
|
1907 : !NILP (aelt) /* already local */
|
|
|
1908 ))
|
|
|
1909 {
|
|
|
1910 /* Cache is valid */
|
|
|
1911 valcontents = bfwd->current_value;
|
|
|
1912 }
|
|
|
1913 else
|
|
|
1914 {
|
|
|
1915 /* If the current buffer is not the buffer whose binding is
|
|
|
1916 currently cached, or if it's a SYMVAL_BUFFER_LOCAL and
|
|
|
1917 we're looking at the default value, the cache is invalid; we
|
|
|
1918 need to write it out, and find the new CURRENT-ALIST-ELEMENT
|
|
|
1919 */
|
|
|
1920
|
|
|
1921 /* Write out the cached value for the old buffer; copy it
|
|
|
1922 back to its alist element. This works if the current
|
|
|
1923 buffer only sees the default value, too. */
|
|
|
1924 write_out_buffer_local_cache (symbol, bfwd);
|
|
|
1925
|
|
|
1926 /* Find the new value for CURRENT-ALIST-ELEMENT. */
|
|
|
1927 aelt = buffer_local_alist_element (current_buffer, symbol, bfwd);
|
|
|
1928 if (NILP (aelt))
|
|
|
1929 {
|
|
|
1930 /* This buffer is still seeing the default value. */
|
|
|
1931 if (!some_buffer_local_p)
|
|
|
1932 {
|
|
|
1933 /* If it's a SYMVAL_BUFFER_LOCAL, give this buffer a
|
|
|
1934 new assoc for a local value and set
|
|
|
1935 CURRENT-ALIST-ELEMENT to point to that. */
|
|
|
1936 aelt =
|
|
|
1937 do_symval_forwarding (bfwd->current_value,
|
|
|
1938 current_buffer,
|
|
|
1939 XCONSOLE (Vselected_console));
|
|
|
1940 aelt = Fcons (symbol, aelt);
|
|
|
1941 current_buffer->local_var_alist
|
|
|
1942 = Fcons (aelt, current_buffer->local_var_alist);
|
|
|
1943 }
|
|
|
1944 else
|
|
|
1945 {
|
|
|
1946 /* If the variable is a SYMVAL_SOME_BUFFER_LOCAL,
|
|
|
1947 we're currently seeing the default value. */
|
|
|
1948 ;
|
|
|
1949 }
|
|
|
1950 }
|
|
|
1951 /* Cache the new buffer's assoc in CURRENT-ALIST-ELEMENT. */
|
|
|
1952 bfwd->current_alist_element = aelt;
|
|
|
1953 /* Set BUFFER, now that CURRENT-ALIST-ELEMENT is accurate. */
|
|
793
|
1954 bfwd->current_buffer = wrap_buffer (current_buffer);
|
|
428
|
1955 valcontents = bfwd->current_value;
|
|
|
1956 }
|
|
|
1957 break;
|
|
|
1958 }
|
|
|
1959 default:
|
|
|
1960 abort ();
|
|
|
1961 }
|
|
|
1962 store_symval_forwarding (symbol, valcontents, newval);
|
|
|
1963
|
|
|
1964 return newval;
|
|
|
1965 }
|
|
|
1966
|
|
|
1967
|
|
|
1968 /* Access or set a buffer-local symbol's default value. */
|
|
|
1969
|
|
|
1970 /* Return the default value of SYM, but don't check for voidness.
|
|
|
1971 Return Qunbound if it is void. */
|
|
|
1972
|
|
|
1973 static Lisp_Object
|
|
|
1974 default_value (Lisp_Object sym)
|
|
|
1975 {
|
|
|
1976 Lisp_Object valcontents;
|
|
|
1977
|
|
|
1978 CHECK_SYMBOL (sym);
|
|
|
1979
|
|
|
1980 retry:
|
|
|
1981 valcontents = XSYMBOL (sym)->value;
|
|
|
1982
|
|
|
1983 retry_2:
|
|
|
1984 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
1985 return valcontents;
|
|
|
1986
|
|
|
1987 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
1988 {
|
|
|
1989 case SYMVAL_LISP_MAGIC:
|
|
|
1990 /* #### kludge */
|
|
|
1991 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
1992 /* semi-change-o */
|
|
|
1993 goto retry_2;
|
|
|
1994
|
|
|
1995 case SYMVAL_VARALIAS:
|
|
|
1996 sym = follow_varalias_pointers (sym, Qt /* #### kludge */);
|
|
|
1997 /* presto change-o! */
|
|
|
1998 goto retry;
|
|
|
1999
|
|
|
2000 case SYMVAL_UNBOUND_MARKER:
|
|
|
2001 return valcontents;
|
|
|
2002
|
|
|
2003 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
2004 {
|
|
442
|
2005 const struct symbol_value_forward *fwd
|
|
428
|
2006 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
2007 return (*((Lisp_Object *)((char *) XBUFFER (Vbuffer_defaults)
|
|
|
2008 + ((char *)symbol_value_forward_forward (fwd)
|
|
|
2009 - (char *)&buffer_local_flags))));
|
|
|
2010 }
|
|
|
2011
|
|
|
2012 case SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
2013 {
|
|
442
|
2014 const struct symbol_value_forward *fwd
|
|
428
|
2015 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
2016 return (*((Lisp_Object *)((char *) XCONSOLE (Vconsole_defaults)
|
|
|
2017 + ((char *)symbol_value_forward_forward (fwd)
|
|
|
2018 - (char *)&console_local_flags))));
|
|
|
2019 }
|
|
|
2020
|
|
|
2021 case SYMVAL_BUFFER_LOCAL:
|
|
|
2022 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
2023 {
|
|
|
2024 struct symbol_value_buffer_local *bfwd =
|
|
|
2025 XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
2026
|
|
|
2027 /* Handle user-created local variables. */
|
|
|
2028 /* If var is set up for a buffer that lacks a local value for it,
|
|
|
2029 the current value is nominally the default value.
|
|
|
2030 But the current value slot may be more up to date, since
|
|
|
2031 ordinary setq stores just that slot. So use that. */
|
|
|
2032 if (NILP (bfwd->current_alist_element))
|
|
|
2033 return do_symval_forwarding (bfwd->current_value, current_buffer,
|
|
|
2034 XCONSOLE (Vselected_console));
|
|
|
2035 else
|
|
|
2036 return bfwd->default_value;
|
|
|
2037 }
|
|
|
2038 default:
|
|
|
2039 /* For other variables, get the current value. */
|
|
|
2040 return do_symval_forwarding (valcontents, current_buffer,
|
|
|
2041 XCONSOLE (Vselected_console));
|
|
|
2042 }
|
|
|
2043
|
|
|
2044 RETURN_NOT_REACHED (Qnil) /* suppress compiler warning */
|
|
|
2045 }
|
|
|
2046
|
|
|
2047 DEFUN ("default-boundp", Fdefault_boundp, 1, 1, 0, /*
|
|
|
2048 Return t if SYMBOL has a non-void default value.
|
|
|
2049 This is the value that is seen in buffers that do not have their own values
|
|
|
2050 for this variable.
|
|
|
2051 */
|
|
|
2052 (symbol))
|
|
|
2053 {
|
|
|
2054 return UNBOUNDP (default_value (symbol)) ? Qnil : Qt;
|
|
|
2055 }
|
|
|
2056
|
|
|
2057 DEFUN ("default-value", Fdefault_value, 1, 1, 0, /*
|
|
|
2058 Return SYMBOL's default value.
|
|
|
2059 This is the value that is seen in buffers that do not have their own values
|
|
|
2060 for this variable. The default value is meaningful for variables with
|
|
|
2061 local bindings in certain buffers.
|
|
|
2062 */
|
|
|
2063 (symbol))
|
|
|
2064 {
|
|
|
2065 Lisp_Object value = default_value (symbol);
|
|
|
2066
|
|
|
2067 return UNBOUNDP (value) ? Fsignal (Qvoid_variable, list1 (symbol)) : value;
|
|
|
2068 }
|
|
|
2069
|
|
|
2070 DEFUN ("set-default", Fset_default, 2, 2, 0, /*
|
|
444
|
2071 Set SYMBOL's default value to VALUE. SYMBOL and VALUE are evaluated.
|
|
428
|
2072 The default value is seen in buffers that do not have their own values
|
|
|
2073 for this variable.
|
|
|
2074 */
|
|
|
2075 (symbol, value))
|
|
|
2076 {
|
|
|
2077 Lisp_Object valcontents;
|
|
|
2078
|
|
|
2079 CHECK_SYMBOL (symbol);
|
|
|
2080
|
|
|
2081 retry:
|
|
|
2082 valcontents = XSYMBOL (symbol)->value;
|
|
|
2083
|
|
|
2084 retry_2:
|
|
|
2085 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
2086 return Fset (symbol, value);
|
|
|
2087
|
|
|
2088 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
2089 {
|
|
|
2090 case SYMVAL_LISP_MAGIC:
|
|
|
2091 RETURN_IF_NOT_UNBOUND (maybe_call_magic_handler (symbol, Qset_default, 1,
|
|
|
2092 value));
|
|
|
2093 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
2094 /* semi-change-o */
|
|
|
2095 goto retry_2;
|
|
|
2096
|
|
|
2097 case SYMVAL_VARALIAS:
|
|
|
2098 symbol = follow_varalias_pointers (symbol, Qset_default);
|
|
|
2099 /* presto change-o! */
|
|
|
2100 goto retry;
|
|
|
2101
|
|
|
2102 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
2103 set_default_buffer_slot_variable (symbol, value);
|
|
|
2104 return value;
|
|
|
2105
|
|
|
2106 case SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
2107 set_default_console_slot_variable (symbol, value);
|
|
|
2108 return value;
|
|
|
2109
|
|
|
2110 case SYMVAL_BUFFER_LOCAL:
|
|
|
2111 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
2112 {
|
|
|
2113 /* Store new value into the DEFAULT-VALUE slot */
|
|
|
2114 struct symbol_value_buffer_local *bfwd
|
|
|
2115 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
2116
|
|
|
2117 bfwd->default_value = value;
|
|
|
2118 /* If current-buffer doesn't shadow default_value,
|
|
|
2119 * we must set the CURRENT-VALUE slot too */
|
|
|
2120 if (NILP (bfwd->current_alist_element))
|
|
|
2121 store_symval_forwarding (symbol, bfwd->current_value, value);
|
|
|
2122 return value;
|
|
|
2123 }
|
|
|
2124
|
|
|
2125 default:
|
|
|
2126 return Fset (symbol, value);
|
|
|
2127 }
|
|
|
2128 }
|
|
|
2129
|
|
|
2130 DEFUN ("setq-default", Fsetq_default, 0, UNEVALLED, 0, /*
|
|
|
2131 Set the default value of variable SYMBOL to VALUE.
|
|
|
2132 SYMBOL, the variable name, is literal (not evaluated);
|
|
|
2133 VALUE is an expression and it is evaluated.
|
|
|
2134 The default value of a variable is seen in buffers
|
|
|
2135 that do not have their own values for the variable.
|
|
|
2136
|
|
|
2137 More generally, you can use multiple variables and values, as in
|
|
|
2138 (setq-default SYMBOL VALUE SYMBOL VALUE...)
|
|
|
2139 This sets each SYMBOL's default value to the corresponding VALUE.
|
|
|
2140 The VALUE for the Nth SYMBOL can refer to the new default values
|
|
|
2141 of previous SYMBOLs.
|
|
|
2142 */
|
|
|
2143 (args))
|
|
|
2144 {
|
|
|
2145 /* This function can GC */
|
|
|
2146 Lisp_Object symbol, tail, val = Qnil;
|
|
|
2147 int nargs;
|
|
|
2148 struct gcpro gcpro1;
|
|
|
2149
|
|
|
2150 GET_LIST_LENGTH (args, nargs);
|
|
|
2151
|
|
|
2152 if (nargs & 1) /* Odd number of arguments? */
|
|
|
2153 Fsignal (Qwrong_number_of_arguments,
|
|
|
2154 list2 (Qsetq_default, make_int (nargs)));
|
|
|
2155
|
|
|
2156 GCPRO1 (val);
|
|
|
2157
|
|
|
2158 PROPERTY_LIST_LOOP (tail, symbol, val, args)
|
|
|
2159 {
|
|
|
2160 val = Feval (val);
|
|
|
2161 Fset_default (symbol, val);
|
|
|
2162 }
|
|
|
2163
|
|
|
2164 UNGCPRO;
|
|
|
2165 return val;
|
|
|
2166 }
|
|
|
2167
|
|
|
2168 /* Lisp functions for creating and removing buffer-local variables. */
|
|
|
2169
|
|
|
2170 DEFUN ("make-variable-buffer-local", Fmake_variable_buffer_local, 1, 1,
|
|
|
2171 "vMake Variable Buffer Local: ", /*
|
|
|
2172 Make VARIABLE have a separate value for each buffer.
|
|
|
2173 At any time, the value for the current buffer is in effect.
|
|
|
2174 There is also a default value which is seen in any buffer which has not yet
|
|
|
2175 set its own value.
|
|
|
2176 Using `set' or `setq' to set the variable causes it to have a separate value
|
|
|
2177 for the current buffer if it was previously using the default value.
|
|
|
2178 The function `default-value' gets the default value and `set-default'
|
|
|
2179 sets it.
|
|
|
2180 */
|
|
|
2181 (variable))
|
|
|
2182 {
|
|
|
2183 Lisp_Object valcontents;
|
|
|
2184
|
|
|
2185 CHECK_SYMBOL (variable);
|
|
|
2186
|
|
|
2187 retry:
|
|
|
2188 verify_ok_for_buffer_local (variable, Qmake_variable_buffer_local);
|
|
|
2189
|
|
|
2190 valcontents = XSYMBOL (variable)->value;
|
|
|
2191
|
|
|
2192 retry_2:
|
|
|
2193 if (SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
2194 {
|
|
|
2195 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
2196 {
|
|
|
2197 case SYMVAL_LISP_MAGIC:
|
|
|
2198 if (!UNBOUNDP (maybe_call_magic_handler
|
|
|
2199 (variable, Qmake_variable_buffer_local, 0)))
|
|
|
2200 return variable;
|
|
|
2201 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
2202 /* semi-change-o */
|
|
|
2203 goto retry_2;
|
|
|
2204
|
|
|
2205 case SYMVAL_VARALIAS:
|
|
|
2206 variable = follow_varalias_pointers (variable,
|
|
|
2207 Qmake_variable_buffer_local);
|
|
|
2208 /* presto change-o! */
|
|
|
2209 goto retry;
|
|
|
2210
|
|
|
2211 case SYMVAL_FIXNUM_FORWARD:
|
|
|
2212 case SYMVAL_BOOLEAN_FORWARD:
|
|
|
2213 case SYMVAL_OBJECT_FORWARD:
|
|
|
2214 case SYMVAL_UNBOUND_MARKER:
|
|
|
2215 break;
|
|
|
2216
|
|
|
2217 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
2218 case SYMVAL_BUFFER_LOCAL:
|
|
|
2219 /* Already per-each-buffer */
|
|
|
2220 return variable;
|
|
|
2221
|
|
|
2222 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
2223 /* Transmogrify */
|
|
|
2224 XSYMBOL_VALUE_BUFFER_LOCAL (valcontents)->magic.type =
|
|
|
2225 SYMVAL_BUFFER_LOCAL;
|
|
|
2226 return variable;
|
|
|
2227
|
|
|
2228 default:
|
|
|
2229 abort ();
|
|
|
2230 }
|
|
|
2231 }
|
|
|
2232
|
|
|
2233 {
|
|
|
2234 struct symbol_value_buffer_local *bfwd
|
|
|
2235 = alloc_lcrecord_type (struct symbol_value_buffer_local,
|
|
|
2236 &lrecord_symbol_value_buffer_local);
|
|
|
2237 Lisp_Object foo;
|
|
452
|
2238 zero_lcrecord (&bfwd->magic);
|
|
428
|
2239 bfwd->magic.type = SYMVAL_BUFFER_LOCAL;
|
|
|
2240
|
|
|
2241 bfwd->default_value = find_symbol_value (variable);
|
|
|
2242 bfwd->current_value = valcontents;
|
|
|
2243 bfwd->current_alist_element = Qnil;
|
|
|
2244 bfwd->current_buffer = Fcurrent_buffer ();
|
|
793
|
2245 foo = wrap_symbol_value_magic (bfwd);
|
|
428
|
2246 *value_slot_past_magic (variable) = foo;
|
|
|
2247 #if 1 /* #### Yuck! FSFmacs bug-compatibility*/
|
|
|
2248 /* This sets the default-value of any make-variable-buffer-local to nil.
|
|
|
2249 That just sucks. User can just use setq-default to effect that,
|
|
|
2250 but there's no way to do makunbound-default to undo this lossage. */
|
|
|
2251 if (UNBOUNDP (valcontents))
|
|
|
2252 bfwd->default_value = Qnil;
|
|
|
2253 #endif
|
|
|
2254 #if 0 /* #### Yuck! */
|
|
|
2255 /* This sets the value to nil in this buffer.
|
|
|
2256 User could use (setq variable nil) to do this.
|
|
|
2257 It isn't as egregious to do this automatically
|
|
|
2258 as it is to do so to the default-value, but it's
|
|
|
2259 still really dubious. */
|
|
|
2260 if (UNBOUNDP (valcontents))
|
|
|
2261 Fset (variable, Qnil);
|
|
|
2262 #endif
|
|
|
2263 return variable;
|
|
|
2264 }
|
|
|
2265 }
|
|
|
2266
|
|
|
2267 DEFUN ("make-local-variable", Fmake_local_variable, 1, 1,
|
|
|
2268 "vMake Local Variable: ", /*
|
|
|
2269 Make VARIABLE have a separate value in the current buffer.
|
|
|
2270 Other buffers will continue to share a common default value.
|
|
|
2271 \(The buffer-local value of VARIABLE starts out as the same value
|
|
|
2272 VARIABLE previously had. If VARIABLE was void, it remains void.)
|
|
|
2273 See also `make-variable-buffer-local'.
|
|
|
2274
|
|
|
2275 If the variable is already arranged to become local when set,
|
|
|
2276 this function causes a local value to exist for this buffer,
|
|
|
2277 just as setting the variable would do.
|
|
|
2278
|
|
|
2279 Do not use `make-local-variable' to make a hook variable buffer-local.
|
|
|
2280 Use `make-local-hook' instead.
|
|
|
2281 */
|
|
|
2282 (variable))
|
|
|
2283 {
|
|
|
2284 Lisp_Object valcontents;
|
|
|
2285 struct symbol_value_buffer_local *bfwd;
|
|
|
2286
|
|
|
2287 CHECK_SYMBOL (variable);
|
|
|
2288
|
|
|
2289 retry:
|
|
|
2290 verify_ok_for_buffer_local (variable, Qmake_local_variable);
|
|
|
2291
|
|
|
2292 valcontents = XSYMBOL (variable)->value;
|
|
|
2293
|
|
|
2294 retry_2:
|
|
|
2295 if (SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
2296 {
|
|
|
2297 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
2298 {
|
|
|
2299 case SYMVAL_LISP_MAGIC:
|
|
|
2300 if (!UNBOUNDP (maybe_call_magic_handler
|
|
|
2301 (variable, Qmake_local_variable, 0)))
|
|
|
2302 return variable;
|
|
|
2303 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
2304 /* semi-change-o */
|
|
|
2305 goto retry_2;
|
|
|
2306
|
|
|
2307 case SYMVAL_VARALIAS:
|
|
|
2308 variable = follow_varalias_pointers (variable, Qmake_local_variable);
|
|
|
2309 /* presto change-o! */
|
|
|
2310 goto retry;
|
|
|
2311
|
|
|
2312 case SYMVAL_FIXNUM_FORWARD:
|
|
|
2313 case SYMVAL_BOOLEAN_FORWARD:
|
|
|
2314 case SYMVAL_OBJECT_FORWARD:
|
|
|
2315 case SYMVAL_UNBOUND_MARKER:
|
|
|
2316 break;
|
|
|
2317
|
|
|
2318 case SYMVAL_BUFFER_LOCAL:
|
|
|
2319 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
2320 {
|
|
|
2321 /* Make sure the symbol has a local value in this particular
|
|
|
2322 buffer, by setting it to the same value it already has. */
|
|
|
2323 Fset (variable, find_symbol_value (variable));
|
|
|
2324 return variable;
|
|
|
2325 }
|
|
|
2326
|
|
|
2327 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
2328 {
|
|
|
2329 if (!NILP (buffer_local_alist_element (current_buffer,
|
|
|
2330 variable,
|
|
|
2331 (XSYMBOL_VALUE_BUFFER_LOCAL
|
|
|
2332 (valcontents)))))
|
|
|
2333 goto already_local_to_current_buffer;
|
|
|
2334 else
|
|
|
2335 goto already_local_to_some_other_buffer;
|
|
|
2336 }
|
|
|
2337
|
|
|
2338 default:
|
|
|
2339 abort ();
|
|
|
2340 }
|
|
|
2341 }
|
|
|
2342
|
|
|
2343 /* Make sure variable is set up to hold per-buffer values */
|
|
|
2344 bfwd = alloc_lcrecord_type (struct symbol_value_buffer_local,
|
|
|
2345 &lrecord_symbol_value_buffer_local);
|
|
452
|
2346 zero_lcrecord (&bfwd->magic);
|
|
428
|
2347 bfwd->magic.type = SYMVAL_SOME_BUFFER_LOCAL;
|
|
|
2348
|
|
|
2349 bfwd->current_buffer = Qnil;
|
|
|
2350 bfwd->current_alist_element = Qnil;
|
|
|
2351 bfwd->current_value = valcontents;
|
|
|
2352 /* passing 0 is OK because this should never be a
|
|
|
2353 SYMVAL_CURRENT_BUFFER_FORWARD or SYMVAL_SELECTED_CONSOLE_FORWARD
|
|
|
2354 variable. */
|
|
|
2355 bfwd->default_value = do_symval_forwarding (valcontents, 0, 0);
|
|
|
2356
|
|
|
2357 #if 0
|
|
|
2358 if (UNBOUNDP (bfwd->default_value))
|
|
|
2359 bfwd->default_value = Qnil; /* Yuck! */
|
|
|
2360 #endif
|
|
|
2361
|
|
793
|
2362 valcontents = wrap_symbol_value_magic (bfwd);
|
|
428
|
2363 *value_slot_past_magic (variable) = valcontents;
|
|
|
2364
|
|
|
2365 already_local_to_some_other_buffer:
|
|
|
2366
|
|
|
2367 /* Make sure this buffer has its own value of variable */
|
|
|
2368 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
2369
|
|
|
2370 if (UNBOUNDP (bfwd->default_value))
|
|
|
2371 {
|
|
|
2372 /* If default value is unbound, set local value to nil. */
|
|
793
|
2373 bfwd->current_buffer = wrap_buffer (current_buffer);
|
|
428
|
2374 bfwd->current_alist_element = Fcons (variable, Qnil);
|
|
|
2375 current_buffer->local_var_alist =
|
|
|
2376 Fcons (bfwd->current_alist_element, current_buffer->local_var_alist);
|
|
|
2377 store_symval_forwarding (variable, bfwd->current_value, Qnil);
|
|
|
2378 return variable;
|
|
|
2379 }
|
|
|
2380
|
|
|
2381 current_buffer->local_var_alist
|
|
|
2382 = Fcons (Fcons (variable, bfwd->default_value),
|
|
|
2383 current_buffer->local_var_alist);
|
|
|
2384
|
|
|
2385 /* Make sure symbol does not think it is set up for this buffer;
|
|
|
2386 force it to look once again for this buffer's value */
|
|
|
2387 if (!NILP (bfwd->current_buffer) &&
|
|
|
2388 current_buffer == XBUFFER (bfwd->current_buffer))
|
|
|
2389 bfwd->current_buffer = Qnil;
|
|
|
2390
|
|
|
2391 already_local_to_current_buffer:
|
|
|
2392
|
|
|
2393 /* If the symbol forwards into a C variable, then swap in the
|
|
|
2394 variable for this buffer immediately. If C code modifies the
|
|
|
2395 variable before we swap in, then that new value will clobber the
|
|
|
2396 default value the next time we swap. */
|
|
|
2397 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
2398 if (SYMBOL_VALUE_MAGIC_P (bfwd->current_value))
|
|
|
2399 {
|
|
|
2400 switch (XSYMBOL_VALUE_MAGIC_TYPE (bfwd->current_value))
|
|
|
2401 {
|
|
|
2402 case SYMVAL_FIXNUM_FORWARD:
|
|
|
2403 case SYMVAL_BOOLEAN_FORWARD:
|
|
|
2404 case SYMVAL_OBJECT_FORWARD:
|
|
|
2405 case SYMVAL_DEFAULT_BUFFER_FORWARD:
|
|
|
2406 set_up_buffer_local_cache (variable, bfwd, current_buffer, Qnil, 1);
|
|
|
2407 break;
|
|
|
2408
|
|
|
2409 case SYMVAL_UNBOUND_MARKER:
|
|
|
2410 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
2411 break;
|
|
|
2412
|
|
|
2413 default:
|
|
|
2414 abort ();
|
|
|
2415 }
|
|
|
2416 }
|
|
|
2417
|
|
|
2418 return variable;
|
|
|
2419 }
|
|
|
2420
|
|
|
2421 DEFUN ("kill-local-variable", Fkill_local_variable, 1, 1,
|
|
|
2422 "vKill Local Variable: ", /*
|
|
|
2423 Make VARIABLE no longer have a separate value in the current buffer.
|
|
|
2424 From now on the default value will apply in this buffer.
|
|
|
2425 */
|
|
|
2426 (variable))
|
|
|
2427 {
|
|
|
2428 Lisp_Object valcontents;
|
|
|
2429
|
|
|
2430 CHECK_SYMBOL (variable);
|
|
|
2431
|
|
|
2432 retry:
|
|
|
2433 valcontents = XSYMBOL (variable)->value;
|
|
|
2434
|
|
|
2435 retry_2:
|
|
|
2436 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
2437 return variable;
|
|
|
2438
|
|
|
2439 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
2440 {
|
|
|
2441 case SYMVAL_LISP_MAGIC:
|
|
|
2442 if (!UNBOUNDP (maybe_call_magic_handler
|
|
|
2443 (variable, Qkill_local_variable, 0)))
|
|
|
2444 return variable;
|
|
|
2445 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
2446 /* semi-change-o */
|
|
|
2447 goto retry_2;
|
|
|
2448
|
|
|
2449 case SYMVAL_VARALIAS:
|
|
|
2450 variable = follow_varalias_pointers (variable, Qkill_local_variable);
|
|
|
2451 /* presto change-o! */
|
|
|
2452 goto retry;
|
|
|
2453
|
|
|
2454 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
2455 {
|
|
442
|
2456 const struct symbol_value_forward *fwd
|
|
428
|
2457 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
2458 int offset = ((char *) symbol_value_forward_forward (fwd)
|
|
|
2459 - (char *) &buffer_local_flags);
|
|
|
2460 int mask =
|
|
|
2461 XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd)));
|
|
|
2462
|
|
|
2463 if (mask > 0)
|
|
|
2464 {
|
|
|
2465 int (*magicfun) (Lisp_Object sym, Lisp_Object *val,
|
|
|
2466 Lisp_Object in_object, int flags) =
|
|
|
2467 symbol_value_forward_magicfun (fwd);
|
|
|
2468 Lisp_Object oldval = * (Lisp_Object *)
|
|
|
2469 (offset + (char *) XBUFFER (Vbuffer_defaults));
|
|
|
2470 if (magicfun)
|
|
771
|
2471 (magicfun) (variable, &oldval, wrap_buffer (current_buffer), 0);
|
|
428
|
2472 *(Lisp_Object *) (offset + (char *) current_buffer)
|
|
|
2473 = oldval;
|
|
|
2474 current_buffer->local_var_flags &= ~mask;
|
|
|
2475 }
|
|
|
2476 return variable;
|
|
|
2477 }
|
|
|
2478
|
|
|
2479 case SYMVAL_BUFFER_LOCAL:
|
|
|
2480 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
2481 {
|
|
|
2482 /* Get rid of this buffer's alist element, if any */
|
|
|
2483 struct symbol_value_buffer_local *bfwd
|
|
|
2484 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
2485 Lisp_Object alist = current_buffer->local_var_alist;
|
|
|
2486 Lisp_Object alist_element
|
|
|
2487 = buffer_local_alist_element (current_buffer, variable, bfwd);
|
|
|
2488
|
|
|
2489 if (!NILP (alist_element))
|
|
|
2490 current_buffer->local_var_alist = Fdelq (alist_element, alist);
|
|
|
2491
|
|
|
2492 /* Make sure symbol does not think it is set up for this buffer;
|
|
|
2493 force it to look once again for this buffer's value */
|
|
|
2494 if (!NILP (bfwd->current_buffer) &&
|
|
|
2495 current_buffer == XBUFFER (bfwd->current_buffer))
|
|
|
2496 bfwd->current_buffer = Qnil;
|
|
|
2497
|
|
|
2498 /* We just changed the value in the current_buffer. If this
|
|
|
2499 variable forwards to a C variable, we need to change the
|
|
|
2500 value of the C variable. set_up_buffer_local_cache()
|
|
|
2501 will do this. It doesn't hurt to do it always,
|
|
|
2502 so just go ahead and do that. */
|
|
|
2503 set_up_buffer_local_cache (variable, bfwd, current_buffer, Qnil, 1);
|
|
|
2504 }
|
|
|
2505 return variable;
|
|
|
2506
|
|
|
2507 default:
|
|
|
2508 return variable;
|
|
|
2509 }
|
|
|
2510 RETURN_NOT_REACHED(Qnil) /* suppress compiler warning */
|
|
|
2511 }
|
|
|
2512
|
|
|
2513
|
|
|
2514 DEFUN ("kill-console-local-variable", Fkill_console_local_variable, 1, 1,
|
|
|
2515 "vKill Console Local Variable: ", /*
|
|
|
2516 Make VARIABLE no longer have a separate value in the selected console.
|
|
|
2517 From now on the default value will apply in this console.
|
|
|
2518 */
|
|
|
2519 (variable))
|
|
|
2520 {
|
|
|
2521 Lisp_Object valcontents;
|
|
|
2522
|
|
|
2523 CHECK_SYMBOL (variable);
|
|
|
2524
|
|
|
2525 retry:
|
|
|
2526 valcontents = XSYMBOL (variable)->value;
|
|
|
2527
|
|
|
2528 retry_2:
|
|
|
2529 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
2530 return variable;
|
|
|
2531
|
|
|
2532 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
2533 {
|
|
|
2534 case SYMVAL_LISP_MAGIC:
|
|
|
2535 if (!UNBOUNDP (maybe_call_magic_handler
|
|
|
2536 (variable, Qkill_console_local_variable, 0)))
|
|
|
2537 return variable;
|
|
|
2538 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
2539 /* semi-change-o */
|
|
|
2540 goto retry_2;
|
|
|
2541
|
|
|
2542 case SYMVAL_VARALIAS:
|
|
|
2543 variable = follow_varalias_pointers (variable,
|
|
|
2544 Qkill_console_local_variable);
|
|
|
2545 /* presto change-o! */
|
|
|
2546 goto retry;
|
|
|
2547
|
|
|
2548 case SYMVAL_SELECTED_CONSOLE_FORWARD:
|
|
|
2549 {
|
|
442
|
2550 const struct symbol_value_forward *fwd
|
|
428
|
2551 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
2552 int offset = ((char *) symbol_value_forward_forward (fwd)
|
|
|
2553 - (char *) &console_local_flags);
|
|
|
2554 int mask =
|
|
|
2555 XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd)));
|
|
|
2556
|
|
|
2557 if (mask > 0)
|
|
|
2558 {
|
|
|
2559 int (*magicfun) (Lisp_Object sym, Lisp_Object *val,
|
|
|
2560 Lisp_Object in_object, int flags) =
|
|
|
2561 symbol_value_forward_magicfun (fwd);
|
|
|
2562 Lisp_Object oldval = * (Lisp_Object *)
|
|
|
2563 (offset + (char *) XCONSOLE (Vconsole_defaults));
|
|
|
2564 if (magicfun)
|
|
|
2565 magicfun (variable, &oldval, Vselected_console, 0);
|
|
|
2566 *(Lisp_Object *) (offset + (char *) XCONSOLE (Vselected_console))
|
|
|
2567 = oldval;
|
|
|
2568 XCONSOLE (Vselected_console)->local_var_flags &= ~mask;
|
|
|
2569 }
|
|
|
2570 return variable;
|
|
|
2571 }
|
|
|
2572
|
|
|
2573 default:
|
|
|
2574 return variable;
|
|
|
2575 }
|
|
|
2576 }
|
|
|
2577
|
|
|
2578 /* Used by specbind to determine what effects it might have. Returns:
|
|
|
2579 * 0 if symbol isn't buffer-local, and wouldn't be after it is set
|
|
|
2580 * <0 if symbol isn't presently buffer-local, but set would make it so
|
|
|
2581 * >0 if symbol is presently buffer-local
|
|
|
2582 */
|
|
|
2583 int
|
|
|
2584 symbol_value_buffer_local_info (Lisp_Object symbol, struct buffer *buffer)
|
|
|
2585 {
|
|
|
2586 Lisp_Object valcontents;
|
|
|
2587
|
|
|
2588 retry:
|
|
|
2589 valcontents = XSYMBOL (symbol)->value;
|
|
|
2590
|
|
|
2591 retry_2:
|
|
|
2592 if (SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
2593 {
|
|
|
2594 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
2595 {
|
|
|
2596 case SYMVAL_LISP_MAGIC:
|
|
|
2597 /* #### kludge */
|
|
|
2598 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
2599 /* semi-change-o */
|
|
|
2600 goto retry_2;
|
|
|
2601
|
|
|
2602 case SYMVAL_VARALIAS:
|
|
|
2603 symbol = follow_varalias_pointers (symbol, Qt /* #### kludge */);
|
|
|
2604 /* presto change-o! */
|
|
|
2605 goto retry;
|
|
|
2606
|
|
|
2607 case SYMVAL_CURRENT_BUFFER_FORWARD:
|
|
|
2608 {
|
|
442
|
2609 const struct symbol_value_forward *fwd
|
|
428
|
2610 = XSYMBOL_VALUE_FORWARD (valcontents);
|
|
|
2611 int mask = XINT (*((Lisp_Object *)
|
|
|
2612 symbol_value_forward_forward (fwd)));
|
|
|
2613 if ((mask <= 0) || (buffer && (buffer->local_var_flags & mask)))
|
|
|
2614 /* Already buffer-local */
|
|
|
2615 return 1;
|
|
|
2616 else
|
|
|
2617 /* Would be buffer-local after set */
|
|
|
2618 return -1;
|
|
|
2619 }
|
|
|
2620 case SYMVAL_BUFFER_LOCAL:
|
|
|
2621 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
2622 {
|
|
|
2623 struct symbol_value_buffer_local *bfwd
|
|
|
2624 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents);
|
|
|
2625 if (buffer
|
|
|
2626 && !NILP (buffer_local_alist_element (buffer, symbol, bfwd)))
|
|
|
2627 return 1;
|
|
|
2628 else
|
|
|
2629 /* Automatically becomes local when set */
|
|
|
2630 return bfwd->magic.type == SYMVAL_BUFFER_LOCAL ? -1 : 0;
|
|
|
2631 }
|
|
|
2632 default:
|
|
|
2633 return 0;
|
|
|
2634 }
|
|
|
2635 }
|
|
|
2636 return 0;
|
|
|
2637 }
|
|
|
2638
|
|
|
2639
|
|
|
2640 DEFUN ("symbol-value-in-buffer", Fsymbol_value_in_buffer, 2, 3, 0, /*
|
|
|
2641 Return the value of SYMBOL in BUFFER, or UNBOUND-VALUE if it is unbound.
|
|
|
2642 */
|
|
|
2643 (symbol, buffer, unbound_value))
|
|
|
2644 {
|
|
|
2645 Lisp_Object value;
|
|
|
2646 CHECK_SYMBOL (symbol);
|
|
|
2647 CHECK_BUFFER (buffer);
|
|
|
2648 value = symbol_value_in_buffer (symbol, buffer);
|
|
|
2649 return UNBOUNDP (value) ? unbound_value : value;
|
|
|
2650 }
|
|
|
2651
|
|
|
2652 DEFUN ("symbol-value-in-console", Fsymbol_value_in_console, 2, 3, 0, /*
|
|
|
2653 Return the value of SYMBOL in CONSOLE, or UNBOUND-VALUE if it is unbound.
|
|
|
2654 */
|
|
|
2655 (symbol, console, unbound_value))
|
|
|
2656 {
|
|
|
2657 Lisp_Object value;
|
|
|
2658 CHECK_SYMBOL (symbol);
|
|
|
2659 CHECK_CONSOLE (console);
|
|
|
2660 value = symbol_value_in_console (symbol, console);
|
|
|
2661 return UNBOUNDP (value) ? unbound_value : value;
|
|
|
2662 }
|
|
|
2663
|
|
|
2664 DEFUN ("built-in-variable-type", Fbuilt_in_variable_type, 1, 1, 0, /*
|
|
|
2665 If SYMBOL is a built-in variable, return info about this; else return nil.
|
|
|
2666 The returned info will be a symbol, one of
|
|
|
2667
|
|
|
2668 `object' A simple built-in variable.
|
|
|
2669 `const-object' Same, but cannot be set.
|
|
|
2670 `integer' A built-in integer variable.
|
|
|
2671 `const-integer' Same, but cannot be set.
|
|
|
2672 `boolean' A built-in boolean variable.
|
|
|
2673 `const-boolean' Same, but cannot be set.
|
|
|
2674 `const-specifier' Always contains a specifier; e.g. `has-modeline-p'.
|
|
|
2675 `current-buffer' A built-in buffer-local variable.
|
|
|
2676 `const-current-buffer' Same, but cannot be set.
|
|
|
2677 `default-buffer' Forwards to the default value of a built-in
|
|
|
2678 buffer-local variable.
|
|
|
2679 `selected-console' A built-in console-local variable.
|
|
|
2680 `const-selected-console' Same, but cannot be set.
|
|
|
2681 `default-console' Forwards to the default value of a built-in
|
|
|
2682 console-local variable.
|
|
|
2683 */
|
|
|
2684 (symbol))
|
|
|
2685 {
|
|
|
2686 REGISTER Lisp_Object valcontents;
|
|
|
2687
|
|
|
2688 CHECK_SYMBOL (symbol);
|
|
|
2689
|
|
|
2690 retry:
|
|
|
2691 valcontents = XSYMBOL (symbol)->value;
|
|
|
2692
|
|
|
2693 retry_2:
|
|
|
2694 if (!SYMBOL_VALUE_MAGIC_P (valcontents))
|
|
|
2695 return Qnil;
|
|
|
2696
|
|
|
2697 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents))
|
|
|
2698 {
|
|
|
2699 case SYMVAL_LISP_MAGIC:
|
|
|
2700 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed;
|
|
|
2701 /* semi-change-o */
|
|
|
2702 goto retry_2;
|
|
|
2703
|
|
|
2704 case SYMVAL_VARALIAS:
|
|
|
2705 symbol = follow_varalias_pointers (symbol, Qt);
|
|
|
2706 /* presto change-o! */
|
|
|
2707 goto retry;
|
|
|
2708
|
|
|
2709 case SYMVAL_BUFFER_LOCAL:
|
|
|
2710 case SYMVAL_SOME_BUFFER_LOCAL:
|
|
|
2711 valcontents =
|
|
|
2712 XSYMBOL_VALUE_BUFFER_LOCAL (valcontents)->current_value;
|
|
|
2713 /* semi-change-o */
|
|
|
2714 goto retry_2;
|
|
|
2715
|
|
|
2716 case SYMVAL_FIXNUM_FORWARD: return Qinteger;
|
|
|
2717 case SYMVAL_CONST_FIXNUM_FORWARD: return Qconst_integer;
|
|
|
2718 case SYMVAL_BOOLEAN_FORWARD: return Qboolean;
|
|
|
2719 case SYMVAL_CONST_BOOLEAN_FORWARD: return Qconst_boolean;
|
|
|
2720 case SYMVAL_OBJECT_FORWARD: return Qobject;
|
|
|
2721 case SYMVAL_CONST_OBJECT_FORWARD: return Qconst_object;
|
|
|
2722 case SYMVAL_CONST_SPECIFIER_FORWARD: return Qconst_specifier;
|
|
|
2723 case SYMVAL_DEFAULT_BUFFER_FORWARD: return Qdefault_buffer;
|
|
|
2724 case SYMVAL_CURRENT_BUFFER_FORWARD: return Qcurrent_buffer;
|
|
|
2725 case SYMVAL_CONST_CURRENT_BUFFER_FORWARD: return Qconst_current_buffer;
|
|
|
2726 case SYMVAL_DEFAULT_CONSOLE_FORWARD: return Qdefault_console;
|
|
|
2727 case SYMVAL_SELECTED_CONSOLE_FORWARD: return Qselected_console;
|
|
|
2728 case SYMVAL_CONST_SELECTED_CONSOLE_FORWARD: return Qconst_selected_console;
|
|
|
2729 case SYMVAL_UNBOUND_MARKER: return Qnil;
|
|
|
2730
|
|
|
2731 default:
|
|
|
2732 abort (); return Qnil;
|
|
|
2733 }
|
|
|
2734 }
|
|
|
2735
|
|
|
2736
|
|
|
2737 DEFUN ("local-variable-p", Flocal_variable_p, 2, 3, 0, /*
|
|
|
2738 Return t if SYMBOL's value is local to BUFFER.
|
|
444
|
2739 If optional third arg AFTER-SET is non-nil, return t if SYMBOL would be
|
|
428
|
2740 buffer-local after it is set, regardless of whether it is so presently.
|
|
|
2741 A nil value for BUFFER is *not* the same as (current-buffer), but means
|
|
|
2742 "no buffer". Specifically:
|
|
|
2743
|
|
|
2744 -- If BUFFER is nil and AFTER-SET is nil, a return value of t indicates that
|
|
|
2745 the variable is one of the special built-in variables that is always
|
|
|
2746 buffer-local. (This includes `buffer-file-name', `buffer-read-only',
|
|
|
2747 `buffer-undo-list', and others.)
|
|
|
2748
|
|
|
2749 -- If BUFFER is nil and AFTER-SET is t, a return value of t indicates that
|
|
|
2750 the variable has had `make-variable-buffer-local' applied to it.
|
|
|
2751 */
|
|
|
2752 (symbol, buffer, after_set))
|
|
|
2753 {
|
|
|
2754 int local_info;
|
|
|
2755
|
|
|
2756 CHECK_SYMBOL (symbol);
|
|
|
2757 if (!NILP (buffer))
|
|
|
2758 {
|
|
|
2759 buffer = get_buffer (buffer, 1);
|
|
|
2760 local_info = symbol_value_buffer_local_info (symbol, XBUFFER (buffer));
|
|
|
2761 }
|
|
|
2762 else
|
|
|
2763 {
|
|
|
2764 local_info = symbol_value_buffer_local_info (symbol, 0);
|
|
|
2765 }
|
|
|
2766
|
|
|
2767 if (NILP (after_set))
|
|
|
2768 return local_info > 0 ? Qt : Qnil;
|
|
|
2769 else
|
|
|
2770 return local_info != 0 ? Qt : Qnil;
|
|
|
2771 }
|
|
|
2772
|
|
|
2773
|
|
|
2774 /*
|
|
|
2775 I've gone ahead and partially implemented this because it's
|
|
|
2776 super-useful for dealing with the compatibility problems in supporting
|
|
|
2777 the old pointer-shape variables, and preventing people from `setq'ing
|
|
|
2778 the new variables. Any other way of handling this problem is way
|
|
|
2779 ugly, likely to be slow, and generally not something I want to waste
|
|
|
2780 my time worrying about.
|
|
|
2781
|
|
|
2782 The interface and/or function name is sure to change before this
|
|
|
2783 gets into its final form. I currently like the way everything is
|
|
|
2784 set up and it has all the features I want it to have, except for
|
|
|
2785 one: I really want to be able to have multiple nested handlers,
|
|
|
2786 to implement an `advice'-like capability. This would allow,
|
|
|
2787 for example, a clean way of implementing `debug-if-set' or
|
|
|
2788 `debug-if-referenced' and such.
|
|
|
2789
|
|
|
2790 NOTE NOTE NOTE NOTE NOTE NOTE NOTE:
|
|
|
2791 ************************************************************
|
|
|
2792 **Only** the `set-value', `make-unbound', and `make-local'
|
|
|
2793 handler types are currently implemented. Implementing the
|
|
|
2794 get-value and bound-predicate handlers is somewhat tricky
|
|
|
2795 because there are lots of subfunctions (e.g. find_symbol_value()).
|
|
|
2796 find_symbol_value(), in fact, is called from outside of
|
|
|
2797 this module. You'd have to have it do this:
|
|
|
2798
|
|
|
2799 -- check for a `bound-predicate' handler, call that if so;
|
|
|
2800 if it returns nil, return Qunbound
|
|
|
2801 -- check for a `get-value' handler and call it and return
|
|
|
2802 that value
|
|
|
2803
|
|
|
2804 It gets even trickier when you have to deal with
|
|
|
2805 sub-subfunctions like find_symbol_value_1(), and esp.
|
|
|
2806 when you have to properly handle variable aliases, which
|
|
|
2807 can lead to lots of tricky situations. So I've just
|
|
|
2808 punted on this, since the interface isn't officially
|
|
|
2809 exported and we can get by with just a `set-value'
|
|
|
2810 handler.
|
|
|
2811
|
|
|
2812 Actions in unimplemented handler types will correctly
|
|
|
2813 ignore any handlers, and will not fuck anything up or
|
|
|
2814 go awry.
|
|
|
2815
|
|
|
2816 WARNING WARNING: If you do go and implement another
|
|
|
2817 type of handler, make *sure* to change
|
|
|
2818 would_be_magic_handled() so it knows about this,
|
|
|
2819 or dire things could result.
|
|
|
2820 ************************************************************
|
|
|
2821 NOTE NOTE NOTE NOTE NOTE NOTE NOTE
|
|
|
2822
|
|
|
2823 Real documentation is as follows.
|
|
|
2824
|
|
|
2825 Set a magic handler for VARIABLE.
|
|
|
2826 This allows you to specify arbitrary behavior that results from
|
|
|
2827 accessing or setting a variable. For example, retrieving the
|
|
|
2828 variable's value might actually retrieve the first element off of
|
|
|
2829 a list stored in another variable, and setting the variable's value
|
|
|
2830 might add an element to the front of that list. (This is how the
|
|
|
2831 obsolete variable `unread-command-event' is implemented.)
|
|
|
2832
|
|
|
2833 In general it is NOT good programming practice to use magic variables
|
|
|
2834 in a new package that you are designing. If you feel the need to
|
|
|
2835 do this, it's almost certainly a sign that you should be using a
|
|
|
2836 function instead of a variable. This facility is provided to allow
|
|
|
2837 a package to support obsolete variables and provide compatibility
|
|
|
2838 with similar packages with different variable names and semantics.
|
|
|
2839 By using magic handlers, you can cleanly provide obsoleteness and
|
|
|
2840 compatibility support and separate this support from the core
|
|
|
2841 routines in a package.
|
|
|
2842
|
|
|
2843 VARIABLE should be a symbol naming the variable for which the
|
|
|
2844 magic behavior is provided. HANDLER-TYPE is a symbol specifying
|
|
|
2845 which behavior is being controlled, and HANDLER is the function
|
|
|
2846 that will be called to control this behavior. HARG is a
|
|
|
2847 value that will be passed to HANDLER but is otherwise
|
|
|
2848 uninterpreted. KEEP-EXISTING specifies what to do with existing
|
|
|
2849 handlers of the same type; nil means "erase them all", t means
|
|
|
2850 "keep them but insert at the beginning", the list (t) means
|
|
|
2851 "keep them but insert at the end", a function means "keep
|
|
|
2852 them but insert before the specified function", a list containing
|
|
|
2853 a function means "keep them but insert after the specified
|
|
|
2854 function".
|
|
|
2855
|
|
|
2856 You can specify magic behavior for any type of variable at all,
|
|
|
2857 and for any handler types that are unspecified, the standard
|
|
|
2858 behavior applies. This allows you, for example, to use
|
|
|
2859 `defvaralias' in conjunction with this function. (For that
|
|
|
2860 matter, `defvaralias' could be implemented using this function.)
|
|
|
2861
|
|
|
2862 The behaviors that can be specified in HANDLER-TYPE are
|
|
|
2863
|
|
|
2864 get-value (SYM ARGS FUN HARG HANDLERS)
|
|
|
2865 This means that one of the functions `symbol-value',
|
|
|
2866 `default-value', `symbol-value-in-buffer', or
|
|
|
2867 `symbol-value-in-console' was called on SYM.
|
|
|
2868
|
|
|
2869 set-value (SYM ARGS FUN HARG HANDLERS)
|
|
|
2870 This means that one of the functions `set' or `set-default'
|
|
|
2871 was called on SYM.
|
|
|
2872
|
|
|
2873 bound-predicate (SYM ARGS FUN HARG HANDLERS)
|
|
|
2874 This means that one of the functions `boundp', `globally-boundp',
|
|
|
2875 or `default-boundp' was called on SYM.
|
|
|
2876
|
|
|
2877 make-unbound (SYM ARGS FUN HARG HANDLERS)
|
|
|
2878 This means that the function `makunbound' was called on SYM.
|
|
|
2879
|
|
|
2880 local-predicate (SYM ARGS FUN HARG HANDLERS)
|
|
|
2881 This means that the function `local-variable-p' was called
|
|
|
2882 on SYM.
|
|
|
2883
|
|
|
2884 make-local (SYM ARGS FUN HARG HANDLERS)
|
|
|
2885 This means that one of the functions `make-local-variable',
|
|
|
2886 `make-variable-buffer-local', `kill-local-variable',
|
|
|
2887 or `kill-console-local-variable' was called on SYM.
|
|
|
2888
|
|
|
2889 The meanings of the arguments are as follows:
|
|
|
2890
|
|
|
2891 SYM is the symbol on which the function was called, and is always
|
|
|
2892 the first argument to the function.
|
|
|
2893
|
|
|
2894 ARGS are the remaining arguments in the original call (i.e. all
|
|
|
2895 but the first). In the case of `set-value' in particular,
|
|
|
2896 the first element of ARGS is the value to which the variable
|
|
|
2897 is being set. In some cases, ARGS is sanitized from what was
|
|
|
2898 actually given. For example, whenever `nil' is passed to an
|
|
|
2899 argument and it means `current-buffer', the current buffer is
|
|
|
2900 substituted instead.
|
|
|
2901
|
|
|
2902 FUN is a symbol indicating which function is being called.
|
|
|
2903 For many of the functions, you can determine the corresponding
|
|
|
2904 function of a different class using
|
|
|
2905 `symbol-function-corresponding-function'.
|
|
|
2906
|
|
|
2907 HARG is the argument that was given in the call
|
|
|
2908 to `set-symbol-value-handler' for SYM and HANDLER-TYPE.
|
|
|
2909
|
|
|
2910 HANDLERS is a structure containing the remaining handlers
|
|
|
2911 for the variable; to call one of them, use
|
|
|
2912 `chain-to-symbol-value-handler'.
|
|
|
2913
|
|
|
2914 NOTE: You may *not* modify the list in ARGS, and if you want to
|
|
|
2915 keep it around after the handler function exits, you must make
|
|
|
2916 a copy using `copy-sequence'. (Same caveats for HANDLERS also.)
|
|
|
2917 */
|
|
|
2918
|
|
|
2919 static enum lisp_magic_handler
|
|
|
2920 decode_magic_handler_type (Lisp_Object symbol)
|
|
|
2921 {
|
|
|
2922 if (EQ (symbol, Qget_value)) return MAGIC_HANDLER_GET_VALUE;
|
|
|
2923 if (EQ (symbol, Qset_value)) return MAGIC_HANDLER_SET_VALUE;
|
|
|
2924 if (EQ (symbol, Qbound_predicate)) return MAGIC_HANDLER_BOUND_PREDICATE;
|
|
|
2925 if (EQ (symbol, Qmake_unbound)) return MAGIC_HANDLER_MAKE_UNBOUND;
|
|
|
2926 if (EQ (symbol, Qlocal_predicate)) return MAGIC_HANDLER_LOCAL_PREDICATE;
|
|
|
2927 if (EQ (symbol, Qmake_local)) return MAGIC_HANDLER_MAKE_LOCAL;
|
|
|
2928
|
|
563
|
2929 invalid_constant ("Unrecognized symbol value handler type", symbol);
|
|
801
|
2930 RETURN_NOT_REACHED (MAGIC_HANDLER_MAX)
|
|
428
|
2931 }
|
|
|
2932
|
|
|
2933 static enum lisp_magic_handler
|
|
|
2934 handler_type_from_function_symbol (Lisp_Object funsym, int abort_if_not_found)
|
|
|
2935 {
|
|
|
2936 if (EQ (funsym, Qsymbol_value)
|
|
|
2937 || EQ (funsym, Qdefault_value)
|
|
|
2938 || EQ (funsym, Qsymbol_value_in_buffer)
|
|
|
2939 || EQ (funsym, Qsymbol_value_in_console))
|
|
|
2940 return MAGIC_HANDLER_GET_VALUE;
|
|
|
2941
|
|
|
2942 if (EQ (funsym, Qset)
|
|
|
2943 || EQ (funsym, Qset_default))
|
|
|
2944 return MAGIC_HANDLER_SET_VALUE;
|
|
|
2945
|
|
|
2946 if (EQ (funsym, Qboundp)
|
|
|
2947 || EQ (funsym, Qglobally_boundp)
|
|
|
2948 || EQ (funsym, Qdefault_boundp))
|
|
|
2949 return MAGIC_HANDLER_BOUND_PREDICATE;
|
|
|
2950
|
|
|
2951 if (EQ (funsym, Qmakunbound))
|
|
|
2952 return MAGIC_HANDLER_MAKE_UNBOUND;
|
|
|
2953
|
|
|
2954 if (EQ (funsym, Qlocal_variable_p))
|
|
|
2955 return MAGIC_HANDLER_LOCAL_PREDICATE;
|
|
|
2956
|
|
|
2957 if (EQ (funsym, Qmake_variable_buffer_local)
|
|
|
2958 || EQ (funsym, Qmake_local_variable))
|
|
|
2959 return MAGIC_HANDLER_MAKE_LOCAL;
|
|
|
2960
|
|
|
2961 if (abort_if_not_found)
|
|
|
2962 abort ();
|
|
563
|
2963 invalid_argument ("Unrecognized symbol-value function", funsym);
|
|
801
|
2964 RETURN_NOT_REACHED (MAGIC_HANDLER_MAX)
|
|
428
|
2965 }
|
|
|
2966
|
|
|
2967 static int
|
|
|
2968 would_be_magic_handled (Lisp_Object sym, Lisp_Object funsym)
|
|
|
2969 {
|
|
|
2970 /* does not take into account variable aliasing. */
|
|
|
2971 Lisp_Object valcontents = XSYMBOL (sym)->value;
|
|
|
2972 enum lisp_magic_handler slot;
|
|
|
2973
|
|
|
2974 if (!SYMBOL_VALUE_LISP_MAGIC_P (valcontents))
|
|
|
2975 return 0;
|
|
|
2976 slot = handler_type_from_function_symbol (funsym, 1);
|
|
|
2977 if (slot != MAGIC_HANDLER_SET_VALUE && slot != MAGIC_HANDLER_MAKE_UNBOUND
|
|
|
2978 && slot != MAGIC_HANDLER_MAKE_LOCAL)
|
|
|
2979 /* #### temporary kludge because we haven't implemented
|
|
|
2980 lisp-magic variables completely */
|
|
|
2981 return 0;
|
|
|
2982 return !NILP (XSYMBOL_VALUE_LISP_MAGIC (valcontents)->handler[slot]);
|
|
|
2983 }
|
|
|
2984
|
|
|
2985 static Lisp_Object
|
|
|
2986 fetch_value_maybe_past_magic (Lisp_Object sym,
|
|
|
2987 Lisp_Object follow_past_lisp_magic)
|
|
|
2988 {
|
|
|
2989 Lisp_Object value = XSYMBOL (sym)->value;
|
|
|
2990 if (SYMBOL_VALUE_LISP_MAGIC_P (value)
|
|
|
2991 && (EQ (follow_past_lisp_magic, Qt)
|
|
|
2992 || (!NILP (follow_past_lisp_magic)
|
|
|
2993 && !would_be_magic_handled (sym, follow_past_lisp_magic))))
|
|
|
2994 value = XSYMBOL_VALUE_LISP_MAGIC (value)->shadowed;
|
|
|
2995 return value;
|
|
|
2996 }
|
|
|
2997
|
|
|
2998 static Lisp_Object *
|
|
|
2999 value_slot_past_magic (Lisp_Object sym)
|
|
|
3000 {
|
|
|
3001 Lisp_Object *store_pointer = &XSYMBOL (sym)->value;
|
|
|
3002
|
|
|
3003 if (SYMBOL_VALUE_LISP_MAGIC_P (*store_pointer))
|
|
|
3004 store_pointer = &XSYMBOL_VALUE_LISP_MAGIC (sym)->shadowed;
|
|
|
3005 return store_pointer;
|
|
|
3006 }
|
|
|
3007
|
|
|
3008 static Lisp_Object
|
|
|
3009 maybe_call_magic_handler (Lisp_Object sym, Lisp_Object funsym, int nargs, ...)
|
|
|
3010 {
|
|
|
3011 va_list vargs;
|
|
|
3012 Lisp_Object args[20]; /* should be enough ... */
|
|
|
3013 int i;
|
|
|
3014 enum lisp_magic_handler htype;
|
|
|
3015 Lisp_Object legerdemain;
|
|
|
3016 struct symbol_value_lisp_magic *bfwd;
|
|
|
3017
|
|
440
|
3018 assert (nargs >= 0 && nargs < countof (args));
|
|
428
|
3019 legerdemain = XSYMBOL (sym)->value;
|
|
|
3020 assert (SYMBOL_VALUE_LISP_MAGIC_P (legerdemain));
|
|
|
3021 bfwd = XSYMBOL_VALUE_LISP_MAGIC (legerdemain);
|
|
|
3022
|
|
|
3023 va_start (vargs, nargs);
|
|
|
3024 for (i = 0; i < nargs; i++)
|
|
|
3025 args[i] = va_arg (vargs, Lisp_Object);
|
|
|
3026 va_end (vargs);
|
|
|
3027
|
|
|
3028 htype = handler_type_from_function_symbol (funsym, 1);
|
|
|
3029 if (NILP (bfwd->handler[htype]))
|
|
|
3030 return Qunbound;
|
|
|
3031 /* #### should be reusing the arglist, not always consing anew.
|
|
|
3032 Repeated handler invocations should not cause repeated consing.
|
|
|
3033 Doesn't matter for now, because this is just a quick implementation
|
|
|
3034 for obsolescence support. */
|
|
|
3035 return call5 (bfwd->handler[htype], sym, Flist (nargs, args), funsym,
|
|
|
3036 bfwd->harg[htype], Qnil);
|
|
|
3037 }
|
|
|
3038
|
|
|
3039 DEFUN ("dontusethis-set-symbol-value-handler", Fdontusethis_set_symbol_value_handler,
|
|
|
3040 3, 5, 0, /*
|
|
|
3041 Don't you dare use this.
|
|
|
3042 If you do, suffer the wrath of Ben, who is likely to rename
|
|
|
3043 this function (or change the semantics of its arguments) without
|
|
|
3044 pity, thereby invalidating your code.
|
|
|
3045 */
|
|
|
3046 (variable, handler_type, handler, harg, keep_existing))
|
|
|
3047 {
|
|
|
3048 Lisp_Object valcontents;
|
|
|
3049 struct symbol_value_lisp_magic *bfwd;
|
|
|
3050 enum lisp_magic_handler htype;
|
|
|
3051 int i;
|
|
|
3052
|
|
|
3053 /* #### WARNING, only some handler types are implemented. See above.
|
|
|
3054 Actions of other types will ignore a handler if it's there.
|
|
|
3055
|
|
|
3056 #### Also, `chain-to-symbol-value-handler' and
|
|
|
3057 `symbol-function-corresponding-function' are not implemented. */
|
|
|
3058 CHECK_SYMBOL (variable);
|
|
|
3059 CHECK_SYMBOL (handler_type);
|
|
|
3060 htype = decode_magic_handler_type (handler_type);
|
|
|
3061 valcontents = XSYMBOL (variable)->value;
|
|
|
3062 if (!SYMBOL_VALUE_LISP_MAGIC_P (valcontents))
|
|
|
3063 {
|
|
|
3064 bfwd = alloc_lcrecord_type (struct symbol_value_lisp_magic,
|
|
|
3065 &lrecord_symbol_value_lisp_magic);
|
|
452
|
3066 zero_lcrecord (&bfwd->magic);
|
|
428
|
3067 bfwd->magic.type = SYMVAL_LISP_MAGIC;
|
|
|
3068 for (i = 0; i < MAGIC_HANDLER_MAX; i++)
|
|
|
3069 {
|
|
|
3070 bfwd->handler[i] = Qnil;
|
|
|
3071 bfwd->harg[i] = Qnil;
|
|
|
3072 }
|
|
|
3073 bfwd->shadowed = valcontents;
|
|
793
|
3074 XSYMBOL (variable)->value = wrap_symbol_value_magic (bfwd);
|
|
428
|
3075 }
|
|
|
3076 else
|
|
|
3077 bfwd = XSYMBOL_VALUE_LISP_MAGIC (valcontents);
|
|
|
3078 bfwd->handler[htype] = handler;
|
|
|
3079 bfwd->harg[htype] = harg;
|
|
|
3080
|
|
|
3081 for (i = 0; i < MAGIC_HANDLER_MAX; i++)
|
|
|
3082 if (!NILP (bfwd->handler[i]))
|
|
|
3083 break;
|
|
|
3084
|
|
|
3085 if (i == MAGIC_HANDLER_MAX)
|
|
|
3086 /* there are no remaining handlers, so remove the structure. */
|
|
|
3087 XSYMBOL (variable)->value = bfwd->shadowed;
|
|
|
3088
|
|
|
3089 return Qnil;
|
|
|
3090 }
|
|
|
3091
|
|
|
3092
|
|
|
3093 /* functions for working with variable aliases. */
|
|
|
3094
|
|
|
3095 /* Follow the chain of variable aliases for SYMBOL. Return the
|
|
|
3096 resulting symbol, whose value cell is guaranteed not to be a
|
|
|
3097 symbol-value-varalias.
|
|
|
3098
|
|
|
3099 Also maybe follow past symbol-value-lisp-magic -> symbol-value-varalias.
|
|
|
3100 If FUNSYM is t, always follow in such a case. If FUNSYM is nil,
|
|
|
3101 never follow; stop right there. Otherwise FUNSYM should be a
|
|
|
3102 recognized symbol-value function symbol; this means, follow
|
|
|
3103 unless there is a special handler for the named function.
|
|
|
3104
|
|
|
3105 OK, there is at least one reason why it's necessary for
|
|
|
3106 FOLLOW-PAST-LISP-MAGIC to be specified correctly: So that we
|
|
|
3107 can always be sure to catch cyclic variable aliasing. If we never
|
|
|
3108 follow past Lisp magic, then if the following is done:
|
|
|
3109
|
|
|
3110 (defvaralias 'a 'b)
|
|
|
3111 add some magic behavior to a, but not a "get-value" handler
|
|
|
3112 (defvaralias 'b 'a)
|
|
|
3113
|
|
|
3114 then an attempt to retrieve a's or b's value would cause infinite
|
|
|
3115 looping in `symbol-value'.
|
|
|
3116
|
|
|
3117 We (of course) can't always follow past Lisp magic, because then
|
|
|
3118 we make any variable that is lisp-magic -> varalias behave as if
|
|
|
3119 the lisp-magic is not present at all.
|
|
|
3120 */
|
|
|
3121
|
|
|
3122 static Lisp_Object
|
|
|
3123 follow_varalias_pointers (Lisp_Object symbol,
|
|
|
3124 Lisp_Object follow_past_lisp_magic)
|
|
|
3125 {
|
|
|
3126 #define VARALIAS_INDIRECTION_SUSPICION_LENGTH 16
|
|
|
3127 Lisp_Object tortoise, hare, val;
|
|
|
3128 int count;
|
|
|
3129
|
|
|
3130 /* quick out just in case */
|
|
|
3131 if (!SYMBOL_VALUE_MAGIC_P (XSYMBOL (symbol)->value))
|
|
|
3132 return symbol;
|
|
|
3133
|
|
|
3134 /* Compare implementation of indirect_function(). */
|
|
|
3135 for (hare = tortoise = symbol, count = 0;
|
|
|
3136 val = fetch_value_maybe_past_magic (hare, follow_past_lisp_magic),
|
|
|
3137 SYMBOL_VALUE_VARALIAS_P (val);
|
|
|
3138 hare = symbol_value_varalias_aliasee (XSYMBOL_VALUE_VARALIAS (val)),
|
|
|
3139 count++)
|
|
|
3140 {
|
|
|
3141 if (count < VARALIAS_INDIRECTION_SUSPICION_LENGTH) continue;
|
|
|
3142
|
|
|
3143 if (count & 1)
|
|
|
3144 tortoise = symbol_value_varalias_aliasee
|
|
|
3145 (XSYMBOL_VALUE_VARALIAS (fetch_value_maybe_past_magic
|
|
|
3146 (tortoise, follow_past_lisp_magic)));
|
|
|
3147 if (EQ (hare, tortoise))
|
|
|
3148 return Fsignal (Qcyclic_variable_indirection, list1 (symbol));
|
|
|
3149 }
|
|
|
3150
|
|
|
3151 return hare;
|
|
|
3152 }
|
|
|
3153
|
|
|
3154 DEFUN ("defvaralias", Fdefvaralias, 2, 2, 0, /*
|
|
|
3155 Define a variable as an alias for another variable.
|
|
|
3156 Thenceforth, any operations performed on VARIABLE will actually be
|
|
|
3157 performed on ALIAS. Both VARIABLE and ALIAS should be symbols.
|
|
|
3158 If ALIAS is nil, remove any aliases for VARIABLE.
|
|
|
3159 ALIAS can itself be aliased, and the chain of variable aliases
|
|
|
3160 will be followed appropriately.
|
|
|
3161 If VARIABLE already has a value, this value will be shadowed
|
|
|
3162 until the alias is removed, at which point it will be restored.
|
|
|
3163 Currently VARIABLE cannot be a built-in variable, a variable that
|
|
|
3164 has a buffer-local value in any buffer, or the symbols nil or t.
|
|
|
3165 \(ALIAS, however, can be any type of variable.)
|
|
|
3166 */
|
|
|
3167 (variable, alias))
|
|
|
3168 {
|
|
|
3169 struct symbol_value_varalias *bfwd;
|
|
|
3170 Lisp_Object valcontents;
|
|
|
3171
|
|
|
3172 CHECK_SYMBOL (variable);
|
|
|
3173 reject_constant_symbols (variable, Qunbound, 0, Qt);
|
|
|
3174
|
|
|
3175 valcontents = XSYMBOL (variable)->value;
|
|
|
3176
|
|
|
3177 if (NILP (alias))
|
|
|
3178 {
|
|
|
3179 if (SYMBOL_VALUE_VARALIAS_P (valcontents))
|
|
|
3180 {
|
|
|
3181 XSYMBOL (variable)->value =
|
|
|
3182 symbol_value_varalias_shadowed
|
|
|
3183 (XSYMBOL_VALUE_VARALIAS (valcontents));
|
|
|
3184 }
|
|
|
3185 return Qnil;
|
|
|
3186 }
|
|
|
3187
|
|
|
3188 CHECK_SYMBOL (alias);
|
|
|
3189 if (SYMBOL_VALUE_VARALIAS_P (valcontents))
|
|
|
3190 {
|
|
|
3191 /* transmogrify */
|
|
|
3192 XSYMBOL_VALUE_VARALIAS (valcontents)->aliasee = alias;
|
|
|
3193 return Qnil;
|
|
|
3194 }
|
|
|
3195
|
|
|
3196 if (SYMBOL_VALUE_MAGIC_P (valcontents)
|
|
|
3197 && !UNBOUNDP (valcontents))
|
|
563
|
3198 invalid_change ("Variable is magic and cannot be aliased", variable);
|
|
428
|
3199 reject_constant_symbols (variable, Qunbound, 0, Qt);
|
|
|
3200
|
|
|
3201 bfwd = alloc_lcrecord_type (struct symbol_value_varalias,
|
|
|
3202 &lrecord_symbol_value_varalias);
|
|
452
|
3203 zero_lcrecord (&bfwd->magic);
|
|
428
|
3204 bfwd->magic.type = SYMVAL_VARALIAS;
|
|
|
3205 bfwd->aliasee = alias;
|
|
|
3206 bfwd->shadowed = valcontents;
|
|
|
3207
|
|
793
|
3208 valcontents = wrap_symbol_value_magic (bfwd);
|
|
428
|
3209 XSYMBOL (variable)->value = valcontents;
|
|
|
3210 return Qnil;
|
|
|
3211 }
|
|
|
3212
|
|
|
3213 DEFUN ("variable-alias", Fvariable_alias, 1, 2, 0, /*
|
|
|
3214 If VARIABLE is aliased to another variable, return that variable.
|
|
|
3215 VARIABLE should be a symbol. If VARIABLE is not aliased, return nil.
|
|
|
3216 Variable aliases are created with `defvaralias'. See also
|
|
|
3217 `indirect-variable'.
|
|
|
3218 */
|
|
|
3219 (variable, follow_past_lisp_magic))
|
|
|
3220 {
|
|
|
3221 Lisp_Object valcontents;
|
|
|
3222
|
|
|
3223 CHECK_SYMBOL (variable);
|
|
|
3224 if (!NILP (follow_past_lisp_magic) && !EQ (follow_past_lisp_magic, Qt))
|
|
|
3225 {
|
|
|
3226 CHECK_SYMBOL (follow_past_lisp_magic);
|
|
|
3227 handler_type_from_function_symbol (follow_past_lisp_magic, 0);
|
|
|
3228 }
|
|
|
3229
|
|
|
3230 valcontents = fetch_value_maybe_past_magic (variable,
|
|
|
3231 follow_past_lisp_magic);
|
|
|
3232
|
|
|
3233 if (SYMBOL_VALUE_VARALIAS_P (valcontents))
|
|
|
3234 return symbol_value_varalias_aliasee
|
|
|
3235 (XSYMBOL_VALUE_VARALIAS (valcontents));
|
|
|
3236 else
|
|
|
3237 return Qnil;
|
|
|
3238 }
|
|
|
3239
|
|
|
3240 DEFUN ("indirect-variable", Findirect_variable, 1, 2, 0, /*
|
|
|
3241 Return the variable at the end of OBJECT's variable-alias chain.
|
|
|
3242 If OBJECT is a symbol, follow all variable aliases and return
|
|
|
3243 the final (non-aliased) symbol. Variable aliases are created with
|
|
|
3244 the function `defvaralias'.
|
|
|
3245 If OBJECT is not a symbol, just return it.
|
|
|
3246 Signal a cyclic-variable-indirection error if there is a loop in the
|
|
|
3247 variable chain of symbols.
|
|
|
3248 */
|
|
|
3249 (object, follow_past_lisp_magic))
|
|
|
3250 {
|
|
|
3251 if (!SYMBOLP (object))
|
|
|
3252 return object;
|
|
|
3253 if (!NILP (follow_past_lisp_magic) && !EQ (follow_past_lisp_magic, Qt))
|
|
|
3254 {
|
|
|
3255 CHECK_SYMBOL (follow_past_lisp_magic);
|
|
|
3256 handler_type_from_function_symbol (follow_past_lisp_magic, 0);
|
|
|
3257 }
|
|
|
3258 return follow_varalias_pointers (object, follow_past_lisp_magic);
|
|
|
3259 }
|
|
|
3260
|
|
|
3261
|
|
|
3262 /************************************************************************/
|
|
|
3263 /* initialization */
|
|
|
3264 /************************************************************************/
|
|
|
3265
|
|
|
3266 /* A dumped XEmacs image has a lot more than 1511 symbols. Last
|
|
|
3267 estimate was that there were actually around 6300. So let's try
|
|
|
3268 making this bigger and see if we get better hashing behavior. */
|
|
|
3269 #define OBARRAY_SIZE 16411
|
|
|
3270
|
|
|
3271 #ifndef Qzero
|
|
|
3272 Lisp_Object Qzero;
|
|
|
3273 #endif
|
|
|
3274 #ifndef Qnull_pointer
|
|
|
3275 Lisp_Object Qnull_pointer;
|
|
|
3276 #endif
|
|
|
3277
|
|
|
3278 /* some losing systems can't have static vars at function scope... */
|
|
442
|
3279 static const struct symbol_value_magic guts_of_unbound_marker =
|
|
|
3280 { /* struct symbol_value_magic */
|
|
|
3281 { /* struct lcrecord_header */
|
|
|
3282 { /* struct lrecord_header */
|
|
|
3283 lrecord_type_symbol_value_forward, /* lrecord_type_index */
|
|
|
3284 1, /* mark bit */
|
|
|
3285 1, /* c_readonly bit */
|
|
|
3286 1, /* lisp_readonly bit */
|
|
|
3287 },
|
|
|
3288 0, /* next */
|
|
|
3289 0, /* uid */
|
|
|
3290 0, /* free */
|
|
|
3291 },
|
|
|
3292 0, /* value */
|
|
|
3293 SYMVAL_UNBOUND_MARKER
|
|
|
3294 };
|
|
428
|
3295
|
|
|
3296 void
|
|
|
3297 init_symbols_once_early (void)
|
|
|
3298 {
|
|
442
|
3299 INIT_LRECORD_IMPLEMENTATION (symbol);
|
|
|
3300 INIT_LRECORD_IMPLEMENTATION (symbol_value_forward);
|
|
|
3301 INIT_LRECORD_IMPLEMENTATION (symbol_value_buffer_local);
|
|
|
3302 INIT_LRECORD_IMPLEMENTATION (symbol_value_lisp_magic);
|
|
|
3303 INIT_LRECORD_IMPLEMENTATION (symbol_value_varalias);
|
|
|
3304
|
|
440
|
3305 reinit_symbols_once_early ();
|
|
428
|
3306
|
|
|
3307 /* Bootstrapping problem: Qnil isn't set when make_string_nocopy is
|
|
|
3308 called the first time. */
|
|
867
|
3309 Qnil = Fmake_symbol (make_string_nocopy ((const Ibyte *) "nil", 3));
|
|
793
|
3310 XSTRING_PLIST (XSYMBOL (Qnil)->name) = Qnil;
|
|
428
|
3311 XSYMBOL (Qnil)->value = Qnil; /* Nihil ex nihil */
|
|
|
3312 XSYMBOL (Qnil)->plist = Qnil;
|
|
|
3313
|
|
|
3314 Vobarray = make_vector (OBARRAY_SIZE, Qzero);
|
|
|
3315 initial_obarray = Vobarray;
|
|
|
3316 staticpro (&initial_obarray);
|
|
|
3317 /* Intern nil in the obarray */
|
|
|
3318 {
|
|
793
|
3319 unsigned int hash = hash_string (XSTRING_DATA (XSYMBOL (Qnil)->name), 3);
|
|
428
|
3320 XVECTOR_DATA (Vobarray)[hash % OBARRAY_SIZE] = Qnil;
|
|
|
3321 }
|
|
|
3322
|
|
|
3323 {
|
|
|
3324 /* Required to get around a GCC syntax error on certain
|
|
|
3325 architectures */
|
|
442
|
3326 const struct symbol_value_magic *tem = &guts_of_unbound_marker;
|
|
428
|
3327
|
|
793
|
3328 Qunbound = wrap_symbol_value_magic (tem);
|
|
428
|
3329 }
|
|
|
3330
|
|
|
3331 XSYMBOL (Qnil)->function = Qunbound;
|
|
|
3332
|
|
563
|
3333 DEFSYMBOL (Qt);
|
|
444
|
3334 XSYMBOL (Qt)->value = Qt; /* Veritas aeterna */
|
|
428
|
3335 Vquit_flag = Qnil;
|
|
|
3336
|
|
452
|
3337 dump_add_root_object (&Qnil);
|
|
|
3338 dump_add_root_object (&Qunbound);
|
|
|
3339 dump_add_root_object (&Vquit_flag);
|
|
428
|
3340 }
|
|
|
3341
|
|
|
3342 void
|
|
440
|
3343 reinit_symbols_once_early (void)
|
|
|
3344 {
|
|
|
3345 }
|
|
|
3346
|
|
442
|
3347 static void
|
|
|
3348 defsymbol_massage_name_1 (Lisp_Object *location, const char *name, int dump_p,
|
|
|
3349 int multiword_predicate_p)
|
|
|
3350 {
|
|
|
3351 char temp[500];
|
|
|
3352 int len = strlen (name) - 1;
|
|
|
3353 int i;
|
|
|
3354
|
|
|
3355 if (multiword_predicate_p)
|
|
647
|
3356 assert (len + 1 < (int) sizeof (temp));
|
|
442
|
3357 else
|
|
647
|
3358 assert (len < (int) sizeof (temp));
|
|
442
|
3359 strcpy (temp, name + 1); /* Remove initial Q */
|
|
|
3360 if (multiword_predicate_p)
|
|
|
3361 {
|
|
|
3362 strcpy (temp + len - 1, "_p");
|
|
|
3363 len++;
|
|
|
3364 }
|
|
|
3365 for (i = 0; i < len; i++)
|
|
|
3366 if (temp[i] == '_')
|
|
|
3367 temp[i] = '-';
|
|
867
|
3368 *location = Fintern (make_string ((const Ibyte *) temp, len), Qnil);
|
|
442
|
3369 if (dump_p)
|
|
|
3370 staticpro (location);
|
|
|
3371 else
|
|
|
3372 staticpro_nodump (location);
|
|
|
3373 }
|
|
|
3374
|
|
440
|
3375 void
|
|
442
|
3376 defsymbol_massage_name_nodump (Lisp_Object *location, const char *name)
|
|
|
3377 {
|
|
|
3378 defsymbol_massage_name_1 (location, name, 0, 0);
|
|
|
3379 }
|
|
|
3380
|
|
|
3381 void
|
|
|
3382 defsymbol_massage_name (Lisp_Object *location, const char *name)
|
|
428
|
3383 {
|
|
442
|
3384 defsymbol_massage_name_1 (location, name, 1, 0);
|
|
|
3385 }
|
|
|
3386
|
|
|
3387 void
|
|
|
3388 defsymbol_massage_multiword_predicate_nodump (Lisp_Object *location,
|
|
|
3389 const char *name)
|
|
|
3390 {
|
|
|
3391 defsymbol_massage_name_1 (location, name, 0, 1);
|
|
|
3392 }
|
|
|
3393
|
|
|
3394 void
|
|
|
3395 defsymbol_massage_multiword_predicate (Lisp_Object *location, const char *name)
|
|
|
3396 {
|
|
|
3397 defsymbol_massage_name_1 (location, name, 1, 1);
|
|
|
3398 }
|
|
|
3399
|
|
|
3400 void
|
|
|
3401 defsymbol_nodump (Lisp_Object *location, const char *name)
|
|
|
3402 {
|
|
867
|
3403 *location = Fintern (make_string_nocopy ((const Ibyte *) name,
|
|
428
|
3404 strlen (name)),
|
|
|
3405 Qnil);
|
|
|
3406 staticpro_nodump (location);
|
|
|
3407 }
|
|
|
3408
|
|
|
3409 void
|
|
442
|
3410 defsymbol (Lisp_Object *location, const char *name)
|
|
428
|
3411 {
|
|
867
|
3412 *location = Fintern (make_string_nocopy ((const Ibyte *) name,
|
|
428
|
3413 strlen (name)),
|
|
|
3414 Qnil);
|
|
|
3415 staticpro (location);
|
|
|
3416 }
|
|
|
3417
|
|
|
3418 void
|
|
442
|
3419 defkeyword (Lisp_Object *location, const char *name)
|
|
428
|
3420 {
|
|
|
3421 defsymbol (location, name);
|
|
|
3422 Fset (*location, *location);
|
|
|
3423 }
|
|
|
3424
|
|
442
|
3425 void
|
|
|
3426 defkeyword_massage_name (Lisp_Object *location, const char *name)
|
|
|
3427 {
|
|
|
3428 char temp[500];
|
|
|
3429 int len = strlen (name);
|
|
|
3430
|
|
647
|
3431 assert (len < (int) sizeof (temp));
|
|
442
|
3432 strcpy (temp, name);
|
|
|
3433 temp[1] = ':'; /* it's an underscore in the C variable */
|
|
|
3434
|
|
|
3435 defsymbol_massage_name (location, temp);
|
|
|
3436 Fset (*location, *location);
|
|
|
3437 }
|
|
|
3438
|
|
428
|
3439 #ifdef DEBUG_XEMACS
|
|
930
|
3440 /* Check that nobody spazzed writing a builtin (non-module) DEFUN. */
|
|
428
|
3441 static void
|
|
|
3442 check_sane_subr (Lisp_Subr *subr, Lisp_Object sym)
|
|
|
3443 {
|
|
930
|
3444 if (!initialized) {
|
|
|
3445 assert (subr->min_args >= 0);
|
|
|
3446 assert (subr->min_args <= SUBR_MAX_ARGS);
|
|
|
3447
|
|
|
3448 if (subr->max_args != MANY &&
|
|
|
3449 subr->max_args != UNEVALLED)
|
|
|
3450 {
|
|
|
3451 /* Need to fix lisp.h and eval.c if SUBR_MAX_ARGS too small */
|
|
|
3452 assert (subr->max_args <= SUBR_MAX_ARGS);
|
|
|
3453 assert (subr->min_args <= subr->max_args);
|
|
|
3454 }
|
|
|
3455 assert (UNBOUNDP (XSYMBOL (sym)->function));
|
|
|
3456 }
|
|
428
|
3457 }
|
|
|
3458 #else
|
|
|
3459 #define check_sane_subr(subr, sym) /* nothing */
|
|
|
3460 #endif
|
|
|
3461
|
|
|
3462 #ifdef HAVE_SHLIB
|
|
|
3463 /*
|
|
|
3464 * If we are not in a pure undumped Emacs, we need to make a duplicate of
|
|
|
3465 * the subr. This is because the only time this function will be called
|
|
|
3466 * in a running Emacs is when a dynamically loaded module is adding a
|
|
|
3467 * subr, and we need to make sure that the subr is in allocated, Lisp-
|
|
|
3468 * accessible memory. The address assigned to the static subr struct
|
|
|
3469 * in the shared object will be a trampoline address, so we need to create
|
|
|
3470 * a copy here to ensure that a real address is used.
|
|
|
3471 *
|
|
|
3472 * Once we have copied everything across, we re-use the original static
|
|
|
3473 * structure to store a pointer to the newly allocated one. This will be
|
|
|
3474 * used in emodules.c by emodules_doc_subr() to find a pointer to the
|
|
442
|
3475 * allocated object so that we can set its doc string properly.
|
|
428
|
3476 *
|
|
442
|
3477 * NOTE: We don't actually use the DOC pointer here any more, but we did
|
|
428
|
3478 * in an earlier implementation of module support. There is no harm in
|
|
|
3479 * setting it here in case we ever need it in future implementations.
|
|
|
3480 * subr->doc will point to the new subr structure that was allocated.
|
|
442
|
3481 * Code can then get this value from the static subr structure and use
|
|
428
|
3482 * it if required.
|
|
|
3483 *
|
|
442
|
3484 * FIXME: Should newsubr be staticpro()'ed? I don't think so but I need
|
|
428
|
3485 * a guru to check.
|
|
|
3486 */
|
|
930
|
3487 #define check_module_subr(subr) \
|
|
|
3488 do { \
|
|
|
3489 if (initialized) { \
|
|
|
3490 Lisp_Subr *newsubr; \
|
|
|
3491 Lisp_Object f; \
|
|
|
3492 \
|
|
|
3493 if (subr->min_args < 0) \
|
|
|
3494 signal_ferror (Qdll_error, "%s min_args (%hd) too small", \
|
|
|
3495 subr_name (subr), subr->min_args); \
|
|
|
3496 if (subr->min_args > SUBR_MAX_ARGS) \
|
|
|
3497 signal_ferror (Qdll_error, "%s min_args (%hd) too big (max = %d)", \
|
|
|
3498 subr_name (subr), subr->min_args, SUBR_MAX_ARGS); \
|
|
|
3499 \
|
|
|
3500 if (subr->max_args != MANY && \
|
|
|
3501 subr->max_args != UNEVALLED) \
|
|
|
3502 { \
|
|
|
3503 /* Need to fix lisp.h and eval.c if SUBR_MAX_ARGS too small */ \
|
|
|
3504 if (subr->max_args > SUBR_MAX_ARGS) \
|
|
|
3505 signal_ferror (Qdll_error, "%s max_args (%hd) too big (max = %d)", \
|
|
|
3506 subr_name (subr), subr->max_args, SUBR_MAX_ARGS); \
|
|
|
3507 if (subr->min_args > subr->max_args) \
|
|
|
3508 signal_ferror (Qdll_error, "%s min_args (%hd) > max_args (%hd)", \
|
|
|
3509 subr_name (subr), subr->min_args, subr->max_args); \
|
|
|
3510 } \
|
|
|
3511 \
|
|
|
3512 f = XSYMBOL (sym)->function; \
|
|
|
3513 if (!UNBOUNDP (f) && (!CONSP (f) || !EQ (XCAR (f), Qautoload))) \
|
|
|
3514 signal_ferror (Qdll_error, "Attempt to redefine %s", subr_name (subr)); \
|
|
|
3515 \
|
|
|
3516 newsubr = (Lisp_Subr *) xmalloc (sizeof (Lisp_Subr)); \
|
|
|
3517 memcpy (newsubr, subr, sizeof (Lisp_Subr)); \
|
|
|
3518 subr->doc = (const char *)newsubr; \
|
|
|
3519 subr = newsubr; \
|
|
|
3520 } \
|
|
428
|
3521 } while (0)
|
|
|
3522 #else /* ! HAVE_SHLIB */
|
|
930
|
3523 #define check_module_subr(subr)
|
|
428
|
3524 #endif
|
|
|
3525
|
|
|
3526 void
|
|
|
3527 defsubr (Lisp_Subr *subr)
|
|
|
3528 {
|
|
|
3529 Lisp_Object sym = intern (subr_name (subr));
|
|
|
3530 Lisp_Object fun;
|
|
|
3531
|
|
|
3532 check_sane_subr (subr, sym);
|
|
930
|
3533 check_module_subr (subr);
|
|
428
|
3534
|
|
793
|
3535 fun = wrap_subr (subr);
|
|
428
|
3536 XSYMBOL (sym)->function = fun;
|
|
996
|
3537
|
|
|
3538 #ifdef HAVE_SHLIB
|
|
|
3539 /* If it is declared in a module, update the load history */
|
|
|
3540 if (initialized)
|
|
|
3541 LOADHIST_ATTACH (sym);
|
|
|
3542 #endif
|
|
428
|
3543 }
|
|
|
3544
|
|
|
3545 /* Define a lisp macro using a Lisp_Subr. */
|
|
|
3546 void
|
|
|
3547 defsubr_macro (Lisp_Subr *subr)
|
|
|
3548 {
|
|
|
3549 Lisp_Object sym = intern (subr_name (subr));
|
|
|
3550 Lisp_Object fun;
|
|
|
3551
|
|
|
3552 check_sane_subr (subr, sym);
|
|
930
|
3553 check_module_subr (subr);
|
|
428
|
3554
|
|
793
|
3555 fun = wrap_subr (subr);
|
|
428
|
3556 XSYMBOL (sym)->function = Fcons (Qmacro, fun);
|
|
996
|
3557
|
|
|
3558 #ifdef HAVE_SHLIB
|
|
|
3559 /* If it is declared in a module, update the load history */
|
|
|
3560 if (initialized)
|
|
|
3561 LOADHIST_ATTACH (sym);
|
|
|
3562 #endif
|
|
428
|
3563 }
|
|
|
3564
|
|
442
|
3565 static void
|
|
|
3566 deferror_1 (Lisp_Object *symbol, const char *name, const char *messuhhj,
|
|
|
3567 Lisp_Object inherits_from, int massage_p)
|
|
428
|
3568 {
|
|
|
3569 Lisp_Object conds;
|
|
442
|
3570 if (massage_p)
|
|
|
3571 defsymbol_massage_name (symbol, name);
|
|
|
3572 else
|
|
|
3573 defsymbol (symbol, name);
|
|
428
|
3574
|
|
|
3575 assert (SYMBOLP (inherits_from));
|
|
|
3576 conds = Fget (inherits_from, Qerror_conditions, Qnil);
|
|
|
3577 Fput (*symbol, Qerror_conditions, Fcons (*symbol, conds));
|
|
771
|
3578 /* NOT build_msg_string (). This function is called at load time
|
|
428
|
3579 and the string needs to get translated at run time. (This happens
|
|
|
3580 in the function (display-error) in cmdloop.el.) */
|
|
771
|
3581 Fput (*symbol, Qerror_message, build_msg_string (messuhhj));
|
|
428
|
3582 }
|
|
|
3583
|
|
|
3584 void
|
|
442
|
3585 deferror (Lisp_Object *symbol, const char *name, const char *messuhhj,
|
|
|
3586 Lisp_Object inherits_from)
|
|
|
3587 {
|
|
|
3588 deferror_1 (symbol, name, messuhhj, inherits_from, 0);
|
|
|
3589 }
|
|
|
3590
|
|
|
3591 void
|
|
|
3592 deferror_massage_name (Lisp_Object *symbol, const char *name,
|
|
|
3593 const char *messuhhj, Lisp_Object inherits_from)
|
|
|
3594 {
|
|
|
3595 deferror_1 (symbol, name, messuhhj, inherits_from, 1);
|
|
|
3596 }
|
|
|
3597
|
|
|
3598 void
|
|
|
3599 deferror_massage_name_and_message (Lisp_Object *symbol, const char *name,
|
|
|
3600 Lisp_Object inherits_from)
|
|
|
3601 {
|
|
|
3602 char temp[500];
|
|
|
3603 int i;
|
|
|
3604 int len = strlen (name) - 1;
|
|
|
3605
|
|
647
|
3606 assert (len < (int) sizeof (temp));
|
|
442
|
3607 strcpy (temp, name + 1); /* Remove initial Q */
|
|
|
3608 temp[0] = toupper (temp[0]);
|
|
|
3609 for (i = 0; i < len; i++)
|
|
|
3610 if (temp[i] == '_')
|
|
|
3611 temp[i] = ' ';
|
|
|
3612
|
|
|
3613 deferror_1 (symbol, name, temp, inherits_from, 1);
|
|
|
3614 }
|
|
|
3615
|
|
|
3616 void
|
|
428
|
3617 syms_of_symbols (void)
|
|
|
3618 {
|
|
442
|
3619 DEFSYMBOL (Qvariable_documentation);
|
|
|
3620 DEFSYMBOL (Qvariable_domain); /* I18N3 */
|
|
|
3621 DEFSYMBOL (Qad_advice_info);
|
|
|
3622 DEFSYMBOL (Qad_activate);
|
|
|
3623
|
|
|
3624 DEFSYMBOL (Qget_value);
|
|
|
3625 DEFSYMBOL (Qset_value);
|
|
|
3626 DEFSYMBOL (Qbound_predicate);
|
|
|
3627 DEFSYMBOL (Qmake_unbound);
|
|
|
3628 DEFSYMBOL (Qlocal_predicate);
|
|
|
3629 DEFSYMBOL (Qmake_local);
|
|
|
3630
|
|
|
3631 DEFSYMBOL (Qboundp);
|
|
|
3632 DEFSYMBOL (Qglobally_boundp);
|
|
|
3633 DEFSYMBOL (Qmakunbound);
|
|
|
3634 DEFSYMBOL (Qsymbol_value);
|
|
|
3635 DEFSYMBOL (Qset);
|
|
|
3636 DEFSYMBOL (Qsetq_default);
|
|
|
3637 DEFSYMBOL (Qdefault_boundp);
|
|
|
3638 DEFSYMBOL (Qdefault_value);
|
|
|
3639 DEFSYMBOL (Qset_default);
|
|
|
3640 DEFSYMBOL (Qmake_variable_buffer_local);
|
|
|
3641 DEFSYMBOL (Qmake_local_variable);
|
|
|
3642 DEFSYMBOL (Qkill_local_variable);
|
|
|
3643 DEFSYMBOL (Qkill_console_local_variable);
|
|
|
3644 DEFSYMBOL (Qsymbol_value_in_buffer);
|
|
|
3645 DEFSYMBOL (Qsymbol_value_in_console);
|
|
|
3646 DEFSYMBOL (Qlocal_variable_p);
|
|
|
3647
|
|
|
3648 DEFSYMBOL (Qconst_integer);
|
|
|
3649 DEFSYMBOL (Qconst_boolean);
|
|
|
3650 DEFSYMBOL (Qconst_object);
|
|
|
3651 DEFSYMBOL (Qconst_specifier);
|
|
|
3652 DEFSYMBOL (Qdefault_buffer);
|
|
|
3653 DEFSYMBOL (Qcurrent_buffer);
|
|
|
3654 DEFSYMBOL (Qconst_current_buffer);
|
|
|
3655 DEFSYMBOL (Qdefault_console);
|
|
|
3656 DEFSYMBOL (Qselected_console);
|
|
|
3657 DEFSYMBOL (Qconst_selected_console);
|
|
428
|
3658
|
|
|
3659 DEFSUBR (Fintern);
|
|
|
3660 DEFSUBR (Fintern_soft);
|
|
|
3661 DEFSUBR (Funintern);
|
|
|
3662 DEFSUBR (Fmapatoms);
|
|
|
3663 DEFSUBR (Fapropos_internal);
|
|
|
3664
|
|
|
3665 DEFSUBR (Fsymbol_function);
|
|
|
3666 DEFSUBR (Fsymbol_plist);
|
|
|
3667 DEFSUBR (Fsymbol_name);
|
|
|
3668 DEFSUBR (Fmakunbound);
|
|
|
3669 DEFSUBR (Ffmakunbound);
|
|
|
3670 DEFSUBR (Fboundp);
|
|
|
3671 DEFSUBR (Fglobally_boundp);
|
|
|
3672 DEFSUBR (Ffboundp);
|
|
|
3673 DEFSUBR (Ffset);
|
|
|
3674 DEFSUBR (Fdefine_function);
|
|
|
3675 Ffset (intern ("defalias"), intern ("define-function"));
|
|
|
3676 DEFSUBR (Fsetplist);
|
|
|
3677 DEFSUBR (Fsymbol_value_in_buffer);
|
|
|
3678 DEFSUBR (Fsymbol_value_in_console);
|
|
|
3679 DEFSUBR (Fbuilt_in_variable_type);
|
|
|
3680 DEFSUBR (Fsymbol_value);
|
|
|
3681 DEFSUBR (Fset);
|
|
|
3682 DEFSUBR (Fdefault_boundp);
|
|
|
3683 DEFSUBR (Fdefault_value);
|
|
|
3684 DEFSUBR (Fset_default);
|
|
|
3685 DEFSUBR (Fsetq_default);
|
|
|
3686 DEFSUBR (Fmake_variable_buffer_local);
|
|
|
3687 DEFSUBR (Fmake_local_variable);
|
|
|
3688 DEFSUBR (Fkill_local_variable);
|
|
|
3689 DEFSUBR (Fkill_console_local_variable);
|
|
|
3690 DEFSUBR (Flocal_variable_p);
|
|
|
3691 DEFSUBR (Fdefvaralias);
|
|
|
3692 DEFSUBR (Fvariable_alias);
|
|
|
3693 DEFSUBR (Findirect_variable);
|
|
|
3694 DEFSUBR (Fdontusethis_set_symbol_value_handler);
|
|
|
3695 }
|
|
|
3696
|
|
|
3697 /* Create and initialize a Lisp variable whose value is forwarded to C data */
|
|
|
3698 void
|
|
442
|
3699 defvar_magic (const char *symbol_name, const struct symbol_value_forward *magic)
|
|
428
|
3700 {
|
|
442
|
3701 Lisp_Object sym;
|
|
428
|
3702
|
|
996
|
3703 #ifdef HAVE_SHLIB
|
|
428
|
3704 /*
|
|
|
3705 * As with defsubr(), this will only be called in a dumped Emacs when
|
|
|
3706 * we are adding variables from a dynamically loaded module. That means
|
|
|
3707 * we can't use purespace. Take that into account.
|
|
|
3708 */
|
|
|
3709 if (initialized)
|
|
996
|
3710 {
|
|
|
3711 sym = Fintern (build_string (symbol_name), Qnil);
|
|
|
3712 LOADHIST_ATTACH (sym);
|
|
|
3713 }
|
|
428
|
3714 else
|
|
|
3715 #endif
|
|
867
|
3716 sym = Fintern (make_string_nocopy ((const Ibyte *) symbol_name,
|
|
428
|
3717 strlen (symbol_name)), Qnil);
|
|
|
3718
|
|
793
|
3719 XSYMBOL (sym)->value = wrap_pointer_1 (magic);
|
|
428
|
3720 }
|
|
|
3721
|
|
|
3722 void
|
|
|
3723 vars_of_symbols (void)
|
|
|
3724 {
|
|
|
3725 DEFVAR_LISP ("obarray", &Vobarray /*
|
|
|
3726 Symbol table for use by `intern' and `read'.
|
|
|
3727 It is a vector whose length ought to be prime for best results.
|
|
|
3728 The vector's contents don't make sense if examined from Lisp programs;
|
|
|
3729 to find all the symbols in an obarray, use `mapatoms'.
|
|
|
3730 */ );
|
|
|
3731 /* obarray has been initialized long before */
|
|
|
3732 }
|
