Mercurial > hg > xemacs-beta
annotate src/symbols.c @ 4953:304aebb79cd3
function renamings to track names of char typedefs
-------------------- ChangeLog entries follow: --------------------
man/ChangeLog addition:
2010-01-27 Ben Wing <ben@xemacs.org>
* internals/internals.texi (lrecords):
* internals/internals.texi (The DFC API):
* internals/internals.texi (Conversion to and from External Data):
* internals/internals.texi (Mule-izing Code):
* internals/internals.texi (Pervasive changes throughout XEmacs sources):
* internals/internals.texi (Ben's README):
* internals/internals.texi (Future Work -- Localized Text/Messages):
* emodules.texi (Defining Variables):
Rename:
write_c_string -> write_cistring
build_intstring -> build_istring
build_string -> build_cistring
build_ext_string -> build_extstring
make_ext_string -> make_extstring
buffer_insert_c_string -> buffer_insert_ascstring
intern_int -> intern_istring
See comment in src/ChangeLog about this.
modules/ChangeLog addition:
2010-01-27 Ben Wing <ben@xemacs.org>
* postgresql/postgresql.c (print_pgconn):
* postgresql/postgresql.c (print_pgresult):
* postgresql/postgresql.c (Fpq_conn_defaults):
* postgresql/postgresql.c (Fpq_pgconn):
* postgresql/postgresql.c (Fpq_res_status):
* postgresql/postgresql.c (Fpq_result_error_message):
* postgresql/postgresql.c (Fpq_fname):
* postgresql/postgresql.c (Fpq_get_value):
* postgresql/postgresql.c (Fpq_cmd_status):
* postgresql/postgresql.c (Fpq_cmd_tuples):
* postgresql/postgresql.c (Fpq_notifies):
* postgresql/postgresql.c (Fpq_get_line):
* postgresql/postgresql.c (Fpq_get_line_async):
* postgresql/postgresql.c (FROB):
* postgresql/postgresql.c (init_postgresql_from_environment):
* ldap/eldap.c:
* ldap/eldap.c (Fldap_open):
* ldap/eldap.c (Fldap_search_basic):
* canna/canna_api.c:
* canna/canna_api.c (make_euc_string):
Rename:
write_c_string -> write_cistring
build_intstring -> build_istring
build_string -> build_cistring
build_ext_string -> build_extstring
make_ext_string -> make_extstring
buffer_insert_c_string -> buffer_insert_ascstring
intern_int -> intern_istring
See comment in src/ChangeLog about this.
src/ChangeLog addition:
2010-01-27 Ben Wing <ben@xemacs.org>
* .gdbinit.in.in:
* README:
* abbrev.c (write_abbrev):
* abbrev.c (describe_abbrev):
* alloc.c (make_extstring):
* alloc.c (build_istring):
* alloc.c (build_cistring):
* alloc.c (build_ascstring):
* alloc.c (build_extstring):
* alloc.c (build_msg_istring):
* alloc.c (build_defer_istring):
* buffer.c (Fgenerate_new_buffer_name):
* buffer.c (init_buffer_2):
* console-tty.c (tty_init_console):
* console-x.c (get_display_arg_connection):
* console-x.c (x_perhaps_init_unseen_key_defaults):
* database.c (dbm_map):
* database.c (dbm_get):
* database.c (berkdb_get):
* database.c (berkdb_map):
* device-gtk.c (FROB_PIXMAP):
* device-gtk.c (Fgtk_style_info):
* device-msw.c (msprinter_default_printer):
* device-msw.c (sync_printer_with_devmode):
* device-x.c (coding_system_of_xrm_database):
* device-x.c (x_init_device):
* device-x.c (signal_if_x_error):
* device-x.c (Fx_get_resource):
* device-x.c (Fx_server_vendor):
* device-x.c (Fx_get_font_path):
* dialog-x.c (maybe_run_dbox_text_callback):
* doc.c (extract_object_file_name):
* doc.c (unparesseuxify_doc_string):
* doc.c (get_doc_string):
* doc.c (get_object_file_name):
* doc.c (Fdocumentation):
* doc.c (Fsnarf_documentation):
* doc.c (Fsubstitute_command_keys):
* editfns.c (init_editfns):
* editfns.c (Ftemp_directory):
* editfns.c (Fuser_login_name):
* editfns.c (Fuser_real_login_name):
* editfns.c (Fuser_home_directory):
* editfns.c (Fformat_time_string):
* editfns.c (Fcurrent_time_string):
* editfns.c (Fcurrent_time_zone):
* emacs.c:
* emacs.c (main_1):
* emodules.c (Flist_modules):
* emodules.c (emodules_load):
* emodules.c (emodules_doc_sym):
* emodules.c (vars_of_module):
* event-Xt.c (x_has_keysym):
* event-gtk.c (emacs_gtk_format_magic_event):
* event-gtk.c (dragndrop_data_received):
* event-gtk.c (gtk_reset_key_mapping):
* event-msw.c (mswindows_dde_callback):
* event-msw.c (mswindows_wnd_proc):
* faces.c (complex_vars_of_faces):
* file-coding.c (find_coding_system):
* file-coding.c (setup_eol_coding_systems):
* file-coding.c (make_coding_system_1):
* file-coding.c (snarf_coding_system):
* fileio.c:
* fileio.c (lisp_strerror):
* fileio.c (Ffile_name_directory):
* fileio.c (Ffile_name_as_directory):
* fileio.c (Fdirectory_file_name):
* fileio.c (if):
* fileio.c (Ffile_symlink_p):
* fileio.c (Fencrypt_string):
* fileio.c (Fdecrypt_string):
* filelock.c (lock_file):
* filelock.c (Ffile_locked_p):
* floatfns.c (matherr):
* font-mgr.c (build_fcapi_string):
* font-mgr.c (make_xlfd_font_regexp):
* frame-msw.c (mswindows_window_id):
* frame-msw.c (mswindows_frame_property):
* frame-x.c:
* frame-x.c (color_to_string):
* frame-x.c (maybe_set_frame_title_format):
* frame-x.c (x_cde_transfer_callback):
* frame-x.c (Fx_window_id):
* glade.c (connector):
* glade.c (Fglade_xml_textdomain):
* glade.c (syms_of_glade):
* glyphs-eimage.c (jpeg_instantiate):
* glyphs-eimage.c (png_instantiate):
* glyphs-eimage.c (tiff_instantiate):
* glyphs-gtk.c (font_instantiate):
* glyphs-gtk.c (BUILD_GLYPH_INST):
* glyphs-x.c (x_locate_pixmap_file):
* glyphs-x.c (font_instantiate):
* glyphs-x.c (x_widget_property):
* glyphs-x.c (BUILD_GLYPH_INST):
* glyphs.c (print_image_instance):
* glyphs.c (bitmap_to_lisp_data):
* glyphs.c (pixmap_to_lisp_data):
* gpmevent.c (turn_off_gpm):
* gpmevent.c (Fgpm_enabled_p):
* gpmevent.c (Fgpm_enable):
* gtk-glue.c (__make_string_mapper):
* gtk-glue.c (xemacs_gtklist_to_list):
* gtk-xemacs.c (FROB_FACE):
* gtk-xemacs.c (xemacs_gtk_convert_color):
* hpplay.c (player_error_internal):
* hpplay.c (myHandler):
* insdel.c (buffer_insert_ascstring_1):
* insdel.h:
* insdel.h (buffer_insert_ascstring):
* intl.c (Fcurrent_locale):
* intl.c (Fset_current_locale):
* keymap.c (make_key_description):
* keymap.c (Ftext_char_description):
* keymap.c (describe_command):
* keymap.c (describe_map):
* lisp.h:
* lread.c:
* lread.c (locate_file_in_directory_mapper):
* lread.c (locate_file_construct_suffixed_files_mapper):
* mule-charset.c (Fmake_charset):
* nt.c (Fmswindows_short_file_name):
* nt.c (Fmswindows_long_file_name):
* objects-gtk.c (__get_gtk_font_truename):
* objects-gtk.c (__gtk_font_list_internal):
* objects-msw.c (font_enum_callback_2):
* objects-msw.c (create_hfont_from_font_spec):
* objects-msw.c (mswindows_font_list):
* objects-msw.c (mswindows_font_spec_matches_charset_stage_2):
* objects-tty.c (tty_initialize_font_instance):
* objects-x.c (x_font_truename):
* objects-x.c (x_font_instance_truename):
* objects-x.c (x_font_instance_properties):
* objects-x.c (x_font_list):
* print.c (write_cistring):
* print.c (print_vector_internal):
* print.c (print_cons):
* process-nt.c (nt_canonicalize_host_name):
* process-unix.c (unix_create_process):
* process-unix.c (unix_canonicalize_host_name):
* process.c (status_message):
* process.c (status_notify):
* process.c (init_xemacs_process):
* process.c (syms_of_process):
* redisplay-tty.c (term_get_fkeys_1):
* redisplay-tty.c (CONDITIONAL_REASSIGN):
* search.c (compile_pattern_1):
* select-common.h (selection_data_to_lisp_data):
* select-gtk.c (atom_to_symbol):
* select-gtk.c (PROCESSING_GTK_CODE):
* select-msw.c (mswindows_get_foreign_selection):
* select-x.c (x_atom_to_symbol):
* select-x.c (Fx_get_cutbuffer_internal):
* symbols.c (intern_istring):
* symbols.c (intern):
* symbols.c (intern_converting_underscores_to_dashes):
* symbols.c (Fintern):
* sysdep.c (init_system_name):
* sysdll.c (dll_error):
* sysdll.c (dll_open):
* syswindows.h:
* syswindows.h (build_tstr_string):
* tests.c (DFC_CHECK_LENGTH):
* tests.c (DFC_CHECK_CONTENT):
* tests.c (DFC_RESULT_PASS):
* tests.c (Ftest_data_format_conversion):
* text.c:
* text.c (new_dfc_convert_now_damn_it):
* text.h:
* text.h (build_wext_string):
* tooltalk.c (tt_build_c_string):
* tooltalk.c (Ftooltalk_default_procid):
* tooltalk.c (Ftooltalk_default_session):
* tooltalk.c (init_tooltalk):
* ui-byhand.c (Fgtk_clist_get_text):
* ui-byhand.c (Fgtk_clist_get_pixtext):
* ui-byhand.c (Fgtk_label_get):
* ui-byhand.c (Fgtk_notebook_query_tab_label_packing):
* ui-gtk.c (emacs_gtk_object_printer):
* ui-gtk.c (emacs_gtk_boxed_printer):
* ui-gtk.c (gtk_type_to_lisp):
* ui-gtk.c (symbol_to_enum):
* ui-gtk.c (enum_to_symbol):
* unexaix.c (report_error):
* unexaix.c (ERROR0):
* unexec.c (report_error):
* unexec.c (ERROR0):
* unicode.c (unicode_to_ichar):
* win32.c (tstr_to_local_file_format):
* win32.c (Fmswindows_cygwin_to_win32_path):
* win32.c (struct read_link_hash):
* xemacs.def.in.in:
Rename:
write_c_string -> write_cistring
build_intstring -> build_istring
build_string -> build_cistring
build_ext_string -> build_extstring
make_ext_string -> make_extstring
buffer_insert_c_string -> buffer_insert_ascstring
intern_int -> intern_istring
These functions have been renamed so that the naming harmonizes
with the typedefs for strings: `cistring' along with CIbyte *,
`istring' along with Ibyte *, `extstring' along with Extbyte *,
`ascstring' along with Ascbyte *.
Also make buffer_insert_ascstring take Ascbyte * and assert
that its argument is ASCII.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Wed, 27 Jan 2010 00:35:36 -0600 |
| parents | 19a72041c5ed |
| children | e813cf16c015 |
| rev | line source |
|---|---|
| 428 | 1 /* "intern" and friends -- moved here from lread.c and data.c |
| 2 Copyright (C) 1985-1989, 1992-1994 Free Software Foundation, Inc. | |
|
4940
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(for main branch) add long comment about types of magic symbols
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3 Copyright (C) 1995, 2000, 2001, 2002, 2010 Ben Wing. |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 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 | |
| 19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 21 | |
| 22 /* Synched up with: FSF 19.30. */ | |
| 23 | |
| 24 /* This file has been Mule-ized. */ | |
| 25 | |
| 26 /* NOTE: | |
| 27 | |
| 28 The value cell of a symbol can contain a simple value or one of | |
| 29 various symbol-value-magic objects. Some of these objects can | |
| 30 chain into other kinds of objects. Here is a table of possibilities: | |
| 31 | |
| 32 1a) simple value | |
| 33 1b) Qunbound | |
| 34 1c) symbol-value-forward, excluding Qunbound | |
| 35 2) symbol-value-buffer-local -> 1a or 1b or 1c | |
| 36 3) symbol-value-lisp-magic -> 1a or 1b or 1c | |
| 37 4) symbol-value-lisp-magic -> symbol-value-buffer-local -> 1a or 1b or 1c | |
| 38 5) symbol-value-varalias | |
| 39 6) symbol-value-lisp-magic -> symbol-value-varalias | |
| 40 | |
| 41 The "chain" of a symbol-value-buffer-local is its current_value slot. | |
| 42 | |
| 43 The "chain" of a symbol-value-lisp-magic is its shadowed slot, which | |
| 44 applies for handler types without associated handlers. | |
| 45 | |
| 46 All other fields in all the structures (including the "shadowed" slot | |
| 47 in a symbol-value-varalias) can *only* contain a simple value or Qunbound. | |
| 48 | |
| 49 */ | |
| 50 | |
| 51 /* #### Ugh, though, this file does awful things with symbol-value-magic | |
| 52 objects. This ought to be cleaned up. */ | |
| 53 | |
| 54 #include <config.h> | |
| 55 #include "lisp.h" | |
| 56 | |
| 57 #include "buffer.h" /* for Vbuffer_defaults */ | |
| 872 | 58 #include "console-impl.h" |
| 428 | 59 #include "elhash.h" |
| 60 | |
| 61 Lisp_Object Qad_advice_info, Qad_activate; | |
| 62 | |
| 63 Lisp_Object Qget_value, Qset_value, Qbound_predicate, Qmake_unbound; | |
| 64 Lisp_Object Qlocal_predicate, Qmake_local; | |
| 65 | |
| 66 Lisp_Object Qboundp, Qglobally_boundp, Qmakunbound; | |
| 67 Lisp_Object Qsymbol_value, Qset, Qdefault_boundp, Qdefault_value; | |
| 68 Lisp_Object Qset_default, Qsetq_default; | |
| 69 Lisp_Object Qmake_variable_buffer_local, Qmake_local_variable; | |
| 70 Lisp_Object Qkill_local_variable, Qkill_console_local_variable; | |
| 71 Lisp_Object Qsymbol_value_in_buffer, Qsymbol_value_in_console; | |
| 72 Lisp_Object Qlocal_variable_p; | |
| 73 | |
| 74 Lisp_Object Qconst_integer, Qconst_boolean, Qconst_object; | |
| 75 Lisp_Object Qconst_specifier; | |
| 76 Lisp_Object Qdefault_buffer, Qcurrent_buffer, Qconst_current_buffer; | |
| 77 Lisp_Object Qdefault_console, Qselected_console, Qconst_selected_console; | |
| 78 | |
| 79 static Lisp_Object maybe_call_magic_handler (Lisp_Object sym, | |
| 80 Lisp_Object funsym, | |
| 81 int nargs, ...); | |
| 82 static Lisp_Object fetch_value_maybe_past_magic (Lisp_Object sym, | |
| 83 Lisp_Object follow_past_lisp_magic); | |
| 84 static Lisp_Object *value_slot_past_magic (Lisp_Object sym); | |
| 85 static Lisp_Object follow_varalias_pointers (Lisp_Object symbol, | |
| 86 Lisp_Object follow_past_lisp_magic); | |
|
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diff
changeset
|
87 static Lisp_Object map_varalias_chain (Lisp_Object symbol, |
|
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parents:
4355
diff
changeset
|
88 Lisp_Object follow_past_lisp_magic, |
|
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Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
89 Lisp_Object (*fn) (Lisp_Object arg)); |
| 428 | 90 |
| 91 | |
| 92 static Lisp_Object | |
| 93 mark_symbol (Lisp_Object obj) | |
| 94 { | |
| 440 | 95 Lisp_Symbol *sym = XSYMBOL (obj); |
| 428 | 96 |
| 97 mark_object (sym->value); | |
| 98 mark_object (sym->function); | |
| 793 | 99 mark_object (sym->name); |
| 428 | 100 if (!symbol_next (sym)) |
| 101 return sym->plist; | |
| 102 else | |
| 103 { | |
| 104 mark_object (sym->plist); | |
| 105 /* Mark the rest of the symbols in the obarray hash-chain */ | |
| 106 sym = symbol_next (sym); | |
| 793 | 107 return wrap_symbol (sym); |
| 428 | 108 } |
| 109 } | |
| 110 | |
| 1204 | 111 static const struct memory_description symbol_description[] = { |
| 440 | 112 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, next) }, |
| 113 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, name) }, | |
| 114 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, value) }, | |
| 115 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, function) }, | |
| 116 { XD_LISP_OBJECT, offsetof (Lisp_Symbol, plist) }, | |
| 428 | 117 { XD_END } |
| 118 }; | |
| 119 | |
| 442 | 120 /* Symbol plists are directly accessible, so we need to protect against |
| 121 invalid property list structure */ | |
| 122 | |
| 123 static Lisp_Object | |
| 124 symbol_getprop (Lisp_Object symbol, Lisp_Object property) | |
| 125 { | |
| 126 return external_plist_get (&XSYMBOL (symbol)->plist, property, 0, ERROR_ME); | |
| 127 } | |
| 128 | |
| 129 static int | |
| 130 symbol_putprop (Lisp_Object symbol, Lisp_Object property, Lisp_Object value) | |
| 131 { | |
| 132 external_plist_put (&XSYMBOL (symbol)->plist, property, value, 0, ERROR_ME); | |
| 133 return 1; | |
| 134 } | |
| 135 | |
| 136 static int | |
| 137 symbol_remprop (Lisp_Object symbol, Lisp_Object property) | |
| 138 { | |
| 139 return external_remprop (&XSYMBOL (symbol)->plist, property, 0, ERROR_ME); | |
| 140 } | |
| 141 | |
| 934 | 142 DEFINE_BASIC_LRECORD_IMPLEMENTATION_WITH_PROPS ("symbol", symbol, |
| 143 1, /*dumpable-flag*/ | |
| 144 mark_symbol, print_symbol, | |
| 145 0, 0, 0, symbol_description, | |
| 146 symbol_getprop, | |
| 147 symbol_putprop, | |
| 148 symbol_remprop, | |
| 149 Fsymbol_plist, | |
| 150 Lisp_Symbol); | |
| 428 | 151 |
| 152 /**********************************************************************/ | |
| 153 /* Intern */ | |
| 154 /**********************************************************************/ | |
| 155 | |
| 156 /* #### using a vector here is way bogus. Use a hash table instead. */ | |
| 157 | |
| 158 Lisp_Object Vobarray; | |
| 159 | |
| 160 static Lisp_Object initial_obarray; | |
| 161 | |
| 162 /* oblookup stores the bucket number here, for the sake of Funintern. */ | |
| 163 | |
| 164 static int oblookup_last_bucket_number; | |
| 165 | |
| 166 static Lisp_Object | |
| 167 check_obarray (Lisp_Object obarray) | |
| 168 { | |
| 169 while (!VECTORP (obarray) || XVECTOR_LENGTH (obarray) == 0) | |
| 170 { | |
| 171 /* If Vobarray is now invalid, force it to be valid. */ | |
| 172 if (EQ (Vobarray, obarray)) Vobarray = initial_obarray; | |
| 173 | |
| 174 obarray = wrong_type_argument (Qvectorp, obarray); | |
| 175 } | |
| 176 return obarray; | |
| 177 } | |
| 178 | |
| 179 Lisp_Object | |
|
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|
180 intern_istring (const Ibyte *str) |
| 428 | 181 { |
| 771 | 182 Bytecount len = qxestrlen (str); |
| 428 | 183 Lisp_Object obarray = Vobarray; |
| 184 | |
| 185 if (!VECTORP (obarray) || XVECTOR_LENGTH (obarray) == 0) | |
| 186 obarray = check_obarray (obarray); | |
| 187 | |
| 188 { | |
| 771 | 189 Lisp_Object tem = oblookup (obarray, str, len); |
| 428 | 190 if (SYMBOLP (tem)) |
| 191 return tem; | |
| 192 } | |
| 193 | |
| 771 | 194 return Fintern (make_string (str, len), obarray); |
| 195 } | |
| 196 | |
| 197 Lisp_Object | |
| 867 | 198 intern (const CIbyte *str) |
| 771 | 199 { |
|
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diff
changeset
|
200 return intern_istring ((Ibyte *) str); |
| 428 | 201 } |
| 202 | |
| 814 | 203 Lisp_Object |
| 867 | 204 intern_converting_underscores_to_dashes (const CIbyte *str) |
| 814 | 205 { |
| 206 Bytecount len = strlen (str); | |
| 867 | 207 CIbyte *tmp = alloca_extbytes (len + 1); |
| 814 | 208 Bytecount i; |
| 209 strcpy (tmp, str); | |
| 210 for (i = 0; i < len; i++) | |
| 211 if (tmp[i] == '_') | |
| 212 tmp[i] = '-'; | |
|
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function renamings to track names of char typedefs
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parents:
4952
diff
changeset
|
213 return intern_istring ((Ibyte *) tmp); |
| 814 | 214 } |
| 215 | |
| 428 | 216 DEFUN ("intern", Fintern, 1, 2, 0, /* |
| 217 Return the canonical symbol whose name is STRING. | |
| 218 If there is none, one is created by this function and returned. | |
| 444 | 219 Optional second argument OBARRAY specifies the obarray to use; |
| 220 it defaults to the value of the variable `obarray'. | |
| 428 | 221 */ |
| 222 (string, obarray)) | |
| 223 { | |
| 224 Lisp_Object object, *ptr; | |
| 793 | 225 Lisp_Object symbol; |
| 428 | 226 Bytecount len; |
| 227 | |
| 228 if (NILP (obarray)) obarray = Vobarray; | |
| 229 obarray = check_obarray (obarray); | |
| 230 | |
| 231 CHECK_STRING (string); | |
| 232 | |
| 233 len = XSTRING_LENGTH (string); | |
| 234 object = oblookup (obarray, XSTRING_DATA (string), len); | |
| 235 if (!INTP (object)) | |
| 236 /* Found it */ | |
| 237 return object; | |
| 238 | |
| 239 ptr = &XVECTOR_DATA (obarray)[XINT (object)]; | |
| 240 | |
| 241 object = Fmake_symbol (string); | |
| 793 | 242 symbol = object; |
| 428 | 243 |
| 244 if (SYMBOLP (*ptr)) | |
| 793 | 245 XSYMBOL_NEXT (symbol) = XSYMBOL (*ptr); |
| 428 | 246 else |
| 793 | 247 XSYMBOL_NEXT (symbol) = 0; |
| 428 | 248 *ptr = object; |
| 249 | |
| 826 | 250 if (string_byte (XSYMBOL_NAME (symbol), 0) == ':' && EQ (obarray, Vobarray)) |
| 428 | 251 { |
| 252 /* The LISP way is to put keywords in their own package, but we | |
| 253 don't have packages, so we do something simpler. Someday, | |
| 254 maybe we'll have packages and then this will be reworked. | |
| 255 --Stig. */ | |
| 793 | 256 XSYMBOL_VALUE (symbol) = object; |
| 428 | 257 } |
| 258 | |
| 259 return object; | |
| 260 } | |
| 261 | |
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262 DEFUN ("intern-soft", Fintern_soft, 1, 3, 0, /* |
| 428 | 263 Return the canonical symbol named NAME, or nil if none exists. |
| 264 NAME may be a string or a symbol. If it is a symbol, that exact | |
| 265 symbol is searched for. | |
| 444 | 266 Optional second argument OBARRAY specifies the obarray to use; |
| 267 it defaults to the value of the variable `obarray'. | |
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268 Optional third argument DEFAULT says what Lisp object to return if there is |
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269 no canonical symbol named NAME, and defaults to nil. |
| 428 | 270 */ |
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271 (name, obarray, default_)) |
| 428 | 272 { |
| 273 Lisp_Object tem; | |
| 793 | 274 Lisp_Object string; |
| 428 | 275 |
| 276 if (NILP (obarray)) obarray = Vobarray; | |
| 277 obarray = check_obarray (obarray); | |
| 278 | |
| 279 if (!SYMBOLP (name)) | |
| 280 { | |
| 281 CHECK_STRING (name); | |
| 793 | 282 string = name; |
| 428 | 283 } |
| 284 else | |
| 285 string = symbol_name (XSYMBOL (name)); | |
| 286 | |
| 793 | 287 tem = oblookup (obarray, XSTRING_DATA (string), XSTRING_LENGTH (string)); |
| 428 | 288 if (INTP (tem) || (SYMBOLP (name) && !EQ (name, tem))) |
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289 return default_; |
| 428 | 290 else |
| 291 return tem; | |
| 292 } | |
| 293 | |
| 294 DEFUN ("unintern", Funintern, 1, 2, 0, /* | |
| 295 Delete the symbol named NAME, if any, from OBARRAY. | |
| 296 The value is t if a symbol was found and deleted, nil otherwise. | |
| 297 NAME may be a string or a symbol. If it is a symbol, that symbol | |
| 298 is deleted, if it belongs to OBARRAY--no other symbol is deleted. | |
| 444 | 299 OBARRAY defaults to the value of the variable `obarray'. |
| 428 | 300 */ |
| 301 (name, obarray)) | |
| 302 { | |
| 303 Lisp_Object tem; | |
| 793 | 304 Lisp_Object string; |
| 428 | 305 int hash; |
| 306 | |
| 307 if (NILP (obarray)) obarray = Vobarray; | |
| 308 obarray = check_obarray (obarray); | |
| 309 | |
| 310 if (SYMBOLP (name)) | |
| 311 string = symbol_name (XSYMBOL (name)); | |
| 312 else | |
| 313 { | |
| 314 CHECK_STRING (name); | |
| 793 | 315 string = name; |
| 428 | 316 } |
| 317 | |
| 793 | 318 tem = oblookup (obarray, XSTRING_DATA (string), XSTRING_LENGTH (string)); |
| 428 | 319 if (INTP (tem)) |
| 320 return Qnil; | |
| 321 /* If arg was a symbol, don't delete anything but that symbol itself. */ | |
| 322 if (SYMBOLP (name) && !EQ (name, tem)) | |
| 323 return Qnil; | |
| 324 | |
| 325 hash = oblookup_last_bucket_number; | |
| 326 | |
| 327 if (EQ (XVECTOR_DATA (obarray)[hash], tem)) | |
| 328 { | |
| 329 if (XSYMBOL (tem)->next) | |
| 793 | 330 XVECTOR_DATA (obarray)[hash] = wrap_symbol (XSYMBOL (tem)->next); |
| 428 | 331 else |
| 332 XVECTOR_DATA (obarray)[hash] = Qzero; | |
| 333 } | |
| 334 else | |
| 335 { | |
| 336 Lisp_Object tail, following; | |
| 337 | |
| 338 for (tail = XVECTOR_DATA (obarray)[hash]; | |
| 339 XSYMBOL (tail)->next; | |
| 340 tail = following) | |
| 341 { | |
| 793 | 342 following = wrap_symbol (XSYMBOL (tail)->next); |
| 428 | 343 if (EQ (following, tem)) |
| 344 { | |
| 345 XSYMBOL (tail)->next = XSYMBOL (following)->next; | |
| 346 break; | |
| 347 } | |
| 348 } | |
| 349 } | |
| 350 return Qt; | |
| 351 } | |
| 352 | |
| 353 /* Return the symbol in OBARRAY whose names matches the string | |
| 354 of SIZE characters at PTR. If there is no such symbol in OBARRAY, | |
| 355 return the index into OBARRAY that the string hashes to. | |
| 356 | |
| 357 Also store the bucket number in oblookup_last_bucket_number. */ | |
| 358 | |
| 359 Lisp_Object | |
| 867 | 360 oblookup (Lisp_Object obarray, const Ibyte *ptr, Bytecount size) |
| 428 | 361 { |
| 490 | 362 unsigned int hash, obsize; |
| 440 | 363 Lisp_Symbol *tail; |
| 428 | 364 Lisp_Object bucket; |
| 365 | |
| 366 if (!VECTORP (obarray) || | |
| 367 (obsize = XVECTOR_LENGTH (obarray)) == 0) | |
| 368 { | |
| 369 obarray = check_obarray (obarray); | |
| 370 obsize = XVECTOR_LENGTH (obarray); | |
| 371 } | |
| 372 hash = hash_string (ptr, size) % obsize; | |
| 373 oblookup_last_bucket_number = hash; | |
| 374 bucket = XVECTOR_DATA (obarray)[hash]; | |
| 375 if (ZEROP (bucket)) | |
| 376 ; | |
| 377 else if (!SYMBOLP (bucket)) | |
| 563 | 378 signal_error (Qinvalid_state, "Bad data in guts of obarray", Qunbound); /* Like CADR error message */ |
| 428 | 379 else |
| 380 for (tail = XSYMBOL (bucket); ;) | |
| 381 { | |
| 793 | 382 if (XSTRING_LENGTH (tail->name) == size && |
| 383 !memcmp (XSTRING_DATA (tail->name), ptr, size)) | |
| 428 | 384 { |
| 793 | 385 return wrap_symbol (tail); |
| 428 | 386 } |
| 387 tail = symbol_next (tail); | |
| 388 if (!tail) | |
| 389 break; | |
| 390 } | |
| 391 return make_int (hash); | |
| 392 } | |
| 393 | |
| 490 | 394 /* An excellent string hashing function. |
| 395 Adapted from glib's g_str_hash(). | |
| 396 Investigation by Karl Nelson <kenelson@ece.ucdavis.edu>. | |
| 397 Do a web search for "g_str_hash X31_HASH" if you want to know more. */ | |
| 398 unsigned int | |
| 867 | 399 hash_string (const Ibyte *ptr, Bytecount len) |
| 428 | 400 { |
| 490 | 401 unsigned int hash; |
| 402 | |
| 403 for (hash = 0; len; len--, ptr++) | |
| 404 /* (31 * hash) will probably be optimized to ((hash << 5) - hash). */ | |
| 405 hash = 31 * hash + *ptr; | |
| 406 | |
| 407 return hash; | |
| 428 | 408 } |
| 409 | |
| 410 /* Map FN over OBARRAY. The mapping is stopped when FN returns a | |
| 411 non-zero value. */ | |
| 412 void | |
| 413 map_obarray (Lisp_Object obarray, | |
| 414 int (*fn) (Lisp_Object, void *), void *arg) | |
| 415 { | |
| 416 REGISTER int i; | |
| 417 | |
| 418 CHECK_VECTOR (obarray); | |
| 419 for (i = XVECTOR_LENGTH (obarray) - 1; i >= 0; i--) | |
| 420 { | |
| 421 Lisp_Object tail = XVECTOR_DATA (obarray)[i]; | |
| 422 if (SYMBOLP (tail)) | |
| 423 while (1) | |
| 424 { | |
| 440 | 425 Lisp_Symbol *next; |
| 428 | 426 if ((*fn) (tail, arg)) |
| 427 return; | |
| 428 next = symbol_next (XSYMBOL (tail)); | |
| 429 if (!next) | |
| 430 break; | |
| 793 | 431 tail = wrap_symbol (next); |
| 428 | 432 } |
| 433 } | |
| 434 } | |
| 435 | |
| 436 static int | |
| 437 mapatoms_1 (Lisp_Object sym, void *arg) | |
| 438 { | |
| 439 call1 (*(Lisp_Object *)arg, sym); | |
| 440 return 0; | |
| 441 } | |
| 442 | |
| 443 DEFUN ("mapatoms", Fmapatoms, 1, 2, 0, /* | |
| 444 Call FUNCTION on every symbol in OBARRAY. | |
| 445 OBARRAY defaults to the value of `obarray'. | |
| 446 */ | |
| 447 (function, obarray)) | |
| 448 { | |
| 442 | 449 struct gcpro gcpro1; |
| 450 | |
| 428 | 451 if (NILP (obarray)) |
| 452 obarray = Vobarray; | |
| 453 obarray = check_obarray (obarray); | |
| 454 | |
| 442 | 455 GCPRO1 (obarray); |
| 428 | 456 map_obarray (obarray, mapatoms_1, &function); |
| 442 | 457 UNGCPRO; |
| 428 | 458 return Qnil; |
| 459 } | |
| 460 | |
| 461 | |
| 462 /**********************************************************************/ | |
| 463 /* Apropos */ | |
| 464 /**********************************************************************/ | |
| 465 | |
| 466 struct appropos_mapper_closure | |
| 467 { | |
| 468 Lisp_Object regexp; | |
| 469 Lisp_Object predicate; | |
| 470 Lisp_Object accumulation; | |
| 471 }; | |
| 472 | |
| 473 static int | |
| 474 apropos_mapper (Lisp_Object symbol, void *arg) | |
| 475 { | |
| 476 struct appropos_mapper_closure *closure = | |
| 477 (struct appropos_mapper_closure *) arg; | |
| 478 Bytecount match = fast_lisp_string_match (closure->regexp, | |
| 479 Fsymbol_name (symbol)); | |
| 480 | |
| 481 if (match >= 0 && | |
| 482 (NILP (closure->predicate) || | |
| 483 !NILP (call1 (closure->predicate, symbol)))) | |
| 484 closure->accumulation = Fcons (symbol, closure->accumulation); | |
| 485 | |
| 486 return 0; | |
| 487 } | |
| 488 | |
| 489 DEFUN ("apropos-internal", Fapropos_internal, 1, 2, 0, /* | |
| 444 | 490 Return a list of all symbols whose names contain match for REGEXP. |
| 491 If optional 2nd arg PREDICATE is non-nil, only symbols for which | |
| 492 \(funcall PREDICATE SYMBOL) returns non-nil are returned. | |
| 428 | 493 */ |
| 494 (regexp, predicate)) | |
| 495 { | |
| 496 struct appropos_mapper_closure closure; | |
| 442 | 497 struct gcpro gcpro1; |
| 428 | 498 |
| 499 CHECK_STRING (regexp); | |
| 500 | |
| 501 closure.regexp = regexp; | |
| 502 closure.predicate = predicate; | |
| 503 closure.accumulation = Qnil; | |
| 442 | 504 GCPRO1 (closure.accumulation); |
| 428 | 505 map_obarray (Vobarray, apropos_mapper, &closure); |
| 506 closure.accumulation = Fsort (closure.accumulation, Qstring_lessp); | |
| 442 | 507 UNGCPRO; |
| 428 | 508 return closure.accumulation; |
| 509 } | |
| 510 | |
| 511 | |
| 512 /* Extract and set components of symbols */ | |
| 513 | |
| 514 static void set_up_buffer_local_cache (Lisp_Object sym, | |
| 515 struct symbol_value_buffer_local *bfwd, | |
| 516 struct buffer *buf, | |
| 517 Lisp_Object new_alist_el, | |
| 518 int set_it_p); | |
| 519 | |
| 520 DEFUN ("boundp", Fboundp, 1, 1, 0, /* | |
| 521 Return t if SYMBOL's value is not void. | |
| 522 */ | |
| 523 (symbol)) | |
| 524 { | |
| 525 CHECK_SYMBOL (symbol); | |
| 526 return UNBOUNDP (find_symbol_value (symbol)) ? Qnil : Qt; | |
| 527 } | |
| 528 | |
| 529 DEFUN ("globally-boundp", Fglobally_boundp, 1, 1, 0, /* | |
| 530 Return t if SYMBOL has a global (non-bound) value. | |
| 531 This is for the byte-compiler; you really shouldn't be using this. | |
| 532 */ | |
| 533 (symbol)) | |
| 534 { | |
| 535 CHECK_SYMBOL (symbol); | |
| 536 return UNBOUNDP (top_level_value (symbol)) ? Qnil : Qt; | |
| 537 } | |
| 538 | |
| 539 DEFUN ("fboundp", Ffboundp, 1, 1, 0, /* | |
| 540 Return t if SYMBOL's function definition is not void. | |
| 541 */ | |
| 542 (symbol)) | |
| 543 { | |
| 544 CHECK_SYMBOL (symbol); | |
| 545 return UNBOUNDP (XSYMBOL (symbol)->function) ? Qnil : Qt; | |
| 546 } | |
| 547 | |
| 548 /* Return non-zero if SYM's value or function (the current contents of | |
| 549 which should be passed in as VAL) is constant, i.e. unsettable. */ | |
| 550 | |
| 551 static int | |
| 552 symbol_is_constant (Lisp_Object sym, Lisp_Object val) | |
| 553 { | |
| 554 /* #### - I wonder if it would be better to just have a new magic value | |
| 555 type and make nil, t, and all keywords have that same magic | |
| 556 constant_symbol value. This test is awfully specific about what is | |
| 557 constant and what isn't. --Stig */ | |
| 558 if (EQ (sym, Qnil) || | |
| 559 EQ (sym, Qt)) | |
| 560 return 1; | |
| 561 | |
| 562 if (SYMBOL_VALUE_MAGIC_P (val)) | |
| 563 switch (XSYMBOL_VALUE_MAGIC_TYPE (val)) | |
| 564 { | |
| 565 case SYMVAL_CONST_OBJECT_FORWARD: | |
| 566 case SYMVAL_CONST_SPECIFIER_FORWARD: | |
| 567 case SYMVAL_CONST_FIXNUM_FORWARD: | |
| 568 case SYMVAL_CONST_BOOLEAN_FORWARD: | |
| 569 case SYMVAL_CONST_CURRENT_BUFFER_FORWARD: | |
| 570 case SYMVAL_CONST_SELECTED_CONSOLE_FORWARD: | |
| 571 return 1; | |
| 572 default: break; /* Warning suppression */ | |
| 573 } | |
| 574 | |
| 575 /* We don't return true for keywords here because they are handled | |
| 576 specially by reject_constant_symbols(). */ | |
| 577 return 0; | |
| 578 } | |
| 579 | |
| 580 /* We are setting SYM's value slot (or function slot, if FUNCTION_P is | |
| 581 non-zero) to NEWVAL. Make sure this is allowed. | |
| 582 FOLLOW_PAST_LISP_MAGIC specifies whether we delve past | |
| 583 symbol-value-lisp-magic objects. */ | |
| 584 | |
| 585 void | |
| 586 reject_constant_symbols (Lisp_Object sym, Lisp_Object newval, int function_p, | |
| 587 Lisp_Object follow_past_lisp_magic) | |
| 588 { | |
| 589 Lisp_Object val = | |
| 590 (function_p ? XSYMBOL (sym)->function | |
| 591 : fetch_value_maybe_past_magic (sym, follow_past_lisp_magic)); | |
| 592 | |
| 593 if (SYMBOL_VALUE_MAGIC_P (val) && | |
| 594 XSYMBOL_VALUE_MAGIC_TYPE (val) == SYMVAL_CONST_SPECIFIER_FORWARD) | |
| 563 | 595 invalid_change ("Use `set-specifier' to change a specifier's value", |
| 596 sym); | |
| 428 | 597 |
| 996 | 598 if ( |
| 599 #ifdef HAVE_SHLIB | |
| 600 !(unloading_module && UNBOUNDP(newval)) && | |
| 601 #endif | |
| 602 (symbol_is_constant (sym, val) | |
|
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603 #ifndef NO_NEED_TO_HANDLE_21_4_CODE |
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604 || (SYMBOL_IS_KEYWORD (sym) && !EQ (newval, sym)) |
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605 #endif |
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|
606 )) |
| 563 | 607 signal_error_1 (Qsetting_constant, |
| 608 UNBOUNDP (newval) ? list1 (sym) : list2 (sym, newval)); | |
| 428 | 609 } |
| 610 | |
| 611 /* Verify that it's ok to make SYM buffer-local. This rejects | |
| 612 constants and default-buffer-local variables. FOLLOW_PAST_LISP_MAGIC | |
| 613 specifies whether we delve into symbol-value-lisp-magic objects. | |
| 614 (Should be a symbol indicating what action is being taken; that way, | |
| 615 we don't delve if there's a handler for that action, but do otherwise.) */ | |
| 616 | |
| 617 static void | |
| 618 verify_ok_for_buffer_local (Lisp_Object sym, | |
| 619 Lisp_Object follow_past_lisp_magic) | |
| 620 { | |
| 621 Lisp_Object val = fetch_value_maybe_past_magic (sym, follow_past_lisp_magic); | |
| 622 | |
| 623 if (symbol_is_constant (sym, val)) | |
| 624 goto not_ok; | |
| 625 if (SYMBOL_VALUE_MAGIC_P (val)) | |
| 626 switch (XSYMBOL_VALUE_MAGIC_TYPE (val)) | |
| 627 { | |
| 628 case SYMVAL_DEFAULT_BUFFER_FORWARD: | |
| 629 case SYMVAL_DEFAULT_CONSOLE_FORWARD: | |
| 630 /* #### It's theoretically possible for it to be reasonable | |
| 631 to have both console-local and buffer-local variables, | |
| 632 but I don't want to consider that right now. */ | |
| 633 case SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 634 goto not_ok; | |
| 635 default: break; /* Warning suppression */ | |
| 636 } | |
| 637 | |
| 638 return; | |
| 639 | |
| 640 not_ok: | |
| 563 | 641 invalid_change ("Symbol may not be buffer-local", sym); |
| 428 | 642 } |
| 643 | |
| 644 DEFUN ("makunbound", Fmakunbound, 1, 1, 0, /* | |
| 645 Make SYMBOL's value be void. | |
| 646 */ | |
| 647 (symbol)) | |
| 648 { | |
| 649 Fset (symbol, Qunbound); | |
| 650 return symbol; | |
| 651 } | |
| 652 | |
| 653 DEFUN ("fmakunbound", Ffmakunbound, 1, 1, 0, /* | |
| 654 Make SYMBOL's function definition be void. | |
| 655 */ | |
| 656 (symbol)) | |
| 657 { | |
| 658 CHECK_SYMBOL (symbol); | |
| 659 reject_constant_symbols (symbol, Qunbound, 1, Qt); | |
| 660 XSYMBOL (symbol)->function = Qunbound; | |
| 661 return symbol; | |
| 662 } | |
| 663 | |
| 664 DEFUN ("symbol-function", Fsymbol_function, 1, 1, 0, /* | |
| 665 Return SYMBOL's function definition. Error if that is void. | |
| 666 */ | |
| 667 (symbol)) | |
| 668 { | |
| 669 CHECK_SYMBOL (symbol); | |
| 670 if (UNBOUNDP (XSYMBOL (symbol)->function)) | |
| 671 signal_void_function_error (symbol); | |
| 672 return XSYMBOL (symbol)->function; | |
| 673 } | |
| 674 | |
| 675 DEFUN ("symbol-plist", Fsymbol_plist, 1, 1, 0, /* | |
| 676 Return SYMBOL's property list. | |
| 677 */ | |
| 678 (symbol)) | |
| 679 { | |
| 680 CHECK_SYMBOL (symbol); | |
| 681 return XSYMBOL (symbol)->plist; | |
| 682 } | |
| 683 | |
| 684 DEFUN ("symbol-name", Fsymbol_name, 1, 1, 0, /* | |
| 685 Return SYMBOL's name, a string. | |
| 686 */ | |
| 687 (symbol)) | |
| 688 { | |
| 689 CHECK_SYMBOL (symbol); | |
| 793 | 690 return XSYMBOL (symbol)->name; |
| 428 | 691 } |
| 692 | |
| 693 DEFUN ("fset", Ffset, 2, 2, 0, /* | |
| 694 Set SYMBOL's function definition to NEWDEF, and return NEWDEF. | |
| 695 */ | |
| 696 (symbol, newdef)) | |
| 697 { | |
| 698 /* This function can GC */ | |
| 699 CHECK_SYMBOL (symbol); | |
| 700 reject_constant_symbols (symbol, newdef, 1, Qt); | |
| 701 if (!NILP (Vautoload_queue) && !UNBOUNDP (XSYMBOL (symbol)->function)) | |
| 702 Vautoload_queue = Fcons (Fcons (symbol, XSYMBOL (symbol)->function), | |
| 703 Vautoload_queue); | |
| 704 XSYMBOL (symbol)->function = newdef; | |
| 705 /* Handle automatic advice activation */ | |
| 706 if (CONSP (XSYMBOL (symbol)->plist) && | |
| 707 !NILP (Fget (symbol, Qad_advice_info, Qnil))) | |
| 708 { | |
| 709 call2 (Qad_activate, symbol, Qnil); | |
| 710 newdef = XSYMBOL (symbol)->function; | |
| 711 } | |
| 712 return newdef; | |
| 713 } | |
| 714 | |
| 715 /* FSFmacs */ | |
| 716 DEFUN ("define-function", Fdefine_function, 2, 2, 0, /* | |
| 717 Set SYMBOL's function definition to NEWDEF, and return NEWDEF. | |
| 718 Associates the function with the current load file, if any. | |
| 719 */ | |
| 720 (symbol, newdef)) | |
| 721 { | |
| 722 /* This function can GC */ | |
| 723 Ffset (symbol, newdef); | |
|
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724 LOADHIST_ATTACH (Fcons (Qdefun, symbol)); |
| 428 | 725 return newdef; |
| 726 } | |
| 727 | |
| 3368 | 728 DEFUN ("subr-name", Fsubr_name, 1, 1, 0, /* |
| 729 Return name of function SUBR. | |
| 730 SUBR must be a built-in function. | |
| 731 */ | |
| 732 (subr)) | |
| 733 { | |
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734 const Ascbyte *name; |
| 3497 | 735 CHECK_SUBR (subr); |
| 736 | |
| 3368 | 737 name = XSUBR (subr)->name; |
| 3379 | 738 return make_string ((const Ibyte *)name, strlen (name)); |
| 3368 | 739 } |
| 428 | 740 |
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741 DEFUN ("special-form-p", Fspecial_form_p, 1, 1, 0, /* |
|
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742 Return whether SUBR is a special form. |
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743 |
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744 A special form is a built-in function (a subr, that is a function |
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745 implemented in C, not Lisp) which does not necessarily evaluate all its |
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746 arguments. Much of the basic XEmacs Lisp syntax is implemented by means of |
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747 special forms; examples are `let', `condition-case', `defun', `setq' and so |
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748 on. |
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749 |
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750 If you intend to write a Lisp function that does not necessarily evaluate |
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751 all its arguments, the portable (across emacs variants, and across Lisp |
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752 implementations) way to go about it is to write a macro instead. See |
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753 `defmacro' and `backquote'. |
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754 */ |
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755 (subr)) |
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756 { |
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757 subr = indirect_function (subr, 0); |
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758 return (SUBRP (subr) && XSUBR (subr)->max_args == UNEVALLED) ? Qt : Qnil; |
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759 } |
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760 |
| 428 | 761 DEFUN ("setplist", Fsetplist, 2, 2, 0, /* |
| 762 Set SYMBOL's property list to NEWPLIST, and return NEWPLIST. | |
| 763 */ | |
| 764 (symbol, newplist)) | |
| 765 { | |
| 766 CHECK_SYMBOL (symbol); | |
| 767 | |
| 768 XSYMBOL (symbol)->plist = newplist; | |
| 769 return newplist; | |
| 770 } | |
| 771 | |
| 772 | |
| 773 /**********************************************************************/ | |
| 774 /* symbol-value */ | |
| 775 /**********************************************************************/ | |
| 776 | |
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777 /* |
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778 NOTE NOTE NOTE: |
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779 --------------- |
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780 |
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781 There are various different uses of "magic" with regard to symbols, |
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782 and they need to be distinguished: |
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783 |
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784 1. `symbol-value-magic' class of objects (struct symbol_value_magic): |
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785 A set of Lisp object types used as the value of a variable with any |
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786 behavior other than just a plain repository of a value. This |
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787 includes buffer-local variables, console-local variables, read-only |
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788 variables, variable aliases, variables that are linked to a C |
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789 variable, etc. The more specific types are: |
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790 |
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791 -- `symbol-value-forward': Variables that forward to a C variable. |
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792 NOTE:This includes built-in buffer-local and console-local |
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793 variables, since they forward to an element in a buffer or |
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794 console structure. |
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795 |
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796 -- `symbol-value-buffer-local': Variables on which |
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797 `make-local-variable' or `make-variable-buffer-local' have |
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798 been called. |
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799 |
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800 -- `symbol-value-lisp-magic': See below. |
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801 |
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802 -- `symbol-value-varalias': Variable aliases. |
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803 |
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804 2. `symbol-value-lisp-magic': Variables on which |
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805 `dontusethis-set-symbol-value-handler' have been called. These |
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806 variables are extra-magic in that operations that would normally |
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807 change their value instead get forwarded out to Lisp handlers, |
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808 which can do anything they want. (NOTE: Handlers for getting a |
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809 variable's value aren't implemented yet.) |
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810 |
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811 3. "magicfun" handlers on C-forwarding variables, declared with any |
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812 of the following: |
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813 |
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814 -- DEFVAR_LISP_MAGIC |
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815 -- DEFVAR_INT_MAGIC |
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816 -- DEFVAR_BOOL_MAGIC, |
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817 -- DEFVAR_BUFFER_LOCAL_MAGIC |
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818 -- DEFVAR_BUFFER_DEFAULTS_MAGIC |
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819 -- DEFVAR_CONSOLE_LOCAL_MAGIC |
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820 -- DEFVAR_CONSOLE_DEFAULTS_MAGIC |
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821 |
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822 Here, the "magic function" is a handler that is notified whenever the |
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823 value of a variable is changed, so that some other updating can take |
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824 place (e.g. setting redisplay-related dirty bits, updating a cache, |
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825 etc.). |
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826 |
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827 Note that DEFVAR_LISP_MAGIC does *NOT* have anything to do with |
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828 `symbol-value-lisp-magic'. The former refers to variables that can |
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829 hold an arbitrary Lisp object and forward to a C variable declared |
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830 `Lisp_Object foo', and have a "magicfun" as just described; the |
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831 latter are variables that have Lisp-level handlers that function |
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832 in *PLACE* of normal variable-setting mechanisms, and are established |
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833 with `dontusethis-set-symbol-value-handler', as described above. |
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834 */ |
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835 |
| 428 | 836 /* If the contents of the value cell of a symbol is one of the following |
| 837 three types of objects, then the symbol is "magic" in that setting | |
| 838 and retrieving its value doesn't just set or retrieve the raw | |
| 839 contents of the value cell. None of these objects can escape to | |
| 840 the user level, so there is no loss of generality. | |
| 841 | |
| 842 If a symbol is "unbound", then the contents of its value cell is | |
| 843 Qunbound. Despite appearances, this is *not* a symbol, but is a | |
| 844 symbol-value-forward object. This is so that printing it results | |
| 845 in "INTERNAL OBJECT (XEmacs bug?)", in case it leaks to Lisp, somehow. | |
| 846 | |
| 847 Logically all of the following objects are "symbol-value-magic" | |
| 848 objects, and there are some games played w.r.t. this (#### this | |
| 849 should be cleaned up). SYMBOL_VALUE_MAGIC_P is true for all of | |
| 850 the object types. XSYMBOL_VALUE_MAGIC_TYPE returns the type of | |
| 851 symbol-value-magic object. There are more than three types | |
| 852 returned by this macro: in particular, symbol-value-forward | |
| 853 has eight subtypes, and symbol-value-buffer-local has two. See | |
| 854 symeval.h. | |
| 855 | |
| 856 1. symbol-value-forward | |
| 857 | |
| 858 symbol-value-forward is used for variables whose actual contents | |
| 859 are stored in a C variable of some sort, and for Qunbound. The | |
| 860 lcheader.next field (which is only used to chain together free | |
| 861 lcrecords) holds a pointer to the actual C variable. Included | |
| 862 in this type are "buffer-local" variables that are actually | |
| 863 stored in the buffer object itself; in this case, the "pointer" | |
| 864 is an offset into the struct buffer structure. | |
| 865 | |
| 866 The subtypes are as follows: | |
| 867 | |
| 868 SYMVAL_OBJECT_FORWARD: | |
| 869 (declare with DEFVAR_LISP) | |
| 870 The value of this variable is stored in a C variable of type | |
| 871 "Lisp_Object". Setting this variable sets the C variable. | |
| 872 Accessing this variable retrieves a value from the C variable. | |
| 873 These variables can be buffer-local -- in this case, the | |
| 874 raw symbol-value field gets converted into a | |
| 875 symbol-value-buffer-local, whose "current_value" slot contains | |
| 876 the symbol-value-forward. (See below.) | |
| 877 | |
| 878 SYMVAL_FIXNUM_FORWARD: | |
| 458 | 879 (declare with DEFVAR_INT) |
| 880 Similar to SYMVAL_OBJECT_FORWARD except that the C variable | |
| 881 is of type "Fixnum", a typedef for "EMACS_INT", and the corresponding | |
| 882 lisp variable is always the corresponding integer. | |
| 883 | |
| 428 | 884 SYMVAL_BOOLEAN_FORWARD: |
| 458 | 885 (declare with DEFVAR_BOOL) |
| 428 | 886 Similar to SYMVAL_OBJECT_FORWARD except that the C variable |
| 458 | 887 is of type "int" and is a boolean. |
| 428 | 888 |
| 889 SYMVAL_CONST_OBJECT_FORWARD: | |
| 890 SYMVAL_CONST_FIXNUM_FORWARD: | |
| 891 SYMVAL_CONST_BOOLEAN_FORWARD: | |
| 892 (declare with DEFVAR_CONST_LISP, DEFVAR_CONST_INT, or | |
| 893 DEFVAR_CONST_BOOL) | |
| 894 Similar to SYMVAL_OBJECT_FORWARD, SYMVAL_FIXNUM_FORWARD, or | |
| 895 SYMVAL_BOOLEAN_FORWARD, respectively, except that the value cannot | |
| 896 be changed. | |
| 897 | |
| 898 SYMVAL_CONST_SPECIFIER_FORWARD: | |
| 899 (declare with DEFVAR_SPECIFIER) | |
| 440 | 900 Exactly like SYMVAL_CONST_OBJECT_FORWARD except that the error |
| 901 message you get when attempting to set the value says to use | |
| 428 | 902 `set-specifier' instead. |
| 903 | |
| 904 SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 905 (declare with DEFVAR_BUFFER_LOCAL) | |
| 906 This is used for built-in buffer-local variables -- i.e. | |
| 907 Lisp variables whose value is stored in the "struct buffer". | |
| 908 Variables of this sort always forward into C "Lisp_Object" | |
| 909 fields (although there's no reason in principle that other | |
| 910 types for ints and booleans couldn't be added). Note that | |
| 911 some of these variables are automatically local in each | |
| 912 buffer, while some are only local when they become set | |
| 913 (similar to `make-variable-buffer-local'). In these latter | |
| 914 cases, of course, the default value shows through in all | |
| 915 buffers in which the variable doesn't have a local value. | |
| 916 This is implemented by making sure the "struct buffer" field | |
| 917 always contains the correct value (whether it's local or | |
| 918 a default) and maintaining a mask in the "struct buffer" | |
| 919 indicating which fields are local. When `set-default' is | |
| 920 called on a variable that's not always local to all buffers, | |
| 921 it loops through each buffer and sets the corresponding | |
| 922 field in each buffer without a local value for the field, | |
| 923 according to the mask. | |
| 924 | |
| 925 Calling `make-local-variable' on a variable of this sort | |
| 926 only has the effect of maybe changing the current buffer's mask. | |
| 927 Calling `make-variable-buffer-local' on a variable of this | |
| 928 sort has no effect at all. | |
| 929 | |
| 930 SYMVAL_CONST_CURRENT_BUFFER_FORWARD: | |
| 931 (declare with DEFVAR_CONST_BUFFER_LOCAL) | |
| 932 Same as SYMVAL_CURRENT_BUFFER_FORWARD except that the | |
| 933 value cannot be set. | |
| 934 | |
| 935 SYMVAL_DEFAULT_BUFFER_FORWARD: | |
| 936 (declare with DEFVAR_BUFFER_DEFAULTS) | |
| 937 This is used for the Lisp variables that contain the | |
| 938 default values of built-in buffer-local variables. Setting | |
| 939 or referencing one of these variables forwards into a slot | |
| 940 in the special struct buffer Vbuffer_defaults. | |
| 941 | |
| 942 SYMVAL_UNBOUND_MARKER: | |
| 943 This is used for only one object, Qunbound. | |
| 944 | |
| 945 SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 946 (declare with DEFVAR_CONSOLE_LOCAL) | |
| 947 This is used for built-in console-local variables -- i.e. | |
| 948 Lisp variables whose value is stored in the "struct console". | |
| 949 These work just like built-in buffer-local variables. | |
| 950 However, calling `make-local-variable' or | |
| 951 `make-variable-buffer-local' on one of these variables | |
| 952 is currently disallowed because that would entail having | |
| 953 both console-local and buffer-local variables, which is | |
| 954 trickier to implement. | |
| 955 | |
| 956 SYMVAL_CONST_SELECTED_CONSOLE_FORWARD: | |
| 957 (declare with DEFVAR_CONST_CONSOLE_LOCAL) | |
| 958 Same as SYMVAL_SELECTED_CONSOLE_FORWARD except that the | |
| 959 value cannot be set. | |
| 960 | |
| 961 SYMVAL_DEFAULT_CONSOLE_FORWARD: | |
| 962 (declare with DEFVAR_CONSOLE_DEFAULTS) | |
| 963 This is used for the Lisp variables that contain the | |
| 964 default values of built-in console-local variables. Setting | |
| 965 or referencing one of these variables forwards into a slot | |
| 966 in the special struct console Vconsole_defaults. | |
| 967 | |
| 968 | |
| 969 2. symbol-value-buffer-local | |
| 970 | |
| 971 symbol-value-buffer-local is used for variables that have had | |
| 972 `make-local-variable' or `make-variable-buffer-local' applied | |
| 973 to them. This object contains an alist mapping buffers to | |
| 974 values. In addition, the object contains a "current value", | |
| 975 which is the value in some buffer. Whenever you access the | |
| 976 variable with `symbol-value' or set it with `set' or `setq', | |
| 977 things are switched around so that the "current value" | |
| 978 refers to the current buffer, if it wasn't already. This | |
| 979 way, repeated references to a variable in the same buffer | |
| 980 are almost as efficient as if the variable weren't buffer | |
| 981 local. Note that the alist may not be up-to-date w.r.t. | |
| 982 the buffer whose value is current, as the "current value" | |
| 983 cache is normally only flushed into the alist when the | |
| 984 buffer it refers to changes. | |
| 985 | |
| 986 Note also that it is possible for `make-local-variable' | |
| 987 or `make-variable-buffer-local' to be called on a variable | |
| 988 that forwards into a C variable (i.e. a variable whose | |
| 989 value cell is a symbol-value-forward). In this case, | |
| 990 the value cell becomes a symbol-value-buffer-local (as | |
| 991 always), and the symbol-value-forward moves into | |
| 992 the "current value" cell in this object. Also, in | |
| 993 this case the "current value" *always* refers to the | |
| 994 current buffer, so that the values of the C variable | |
| 995 always is the correct value for the current buffer. | |
| 996 set_buffer_internal() automatically updates the current-value | |
| 997 cells of all buffer-local variables that forward into C | |
| 998 variables. (There is a list of all buffer-local variables | |
| 999 that is maintained for this and other purposes.) | |
| 1000 | |
| 1001 Note that only certain types of `symbol-value-forward' objects | |
| 1002 can find their way into the "current value" cell of a | |
| 1003 `symbol-value-buffer-local' object: SYMVAL_OBJECT_FORWARD, | |
| 1004 SYMVAL_FIXNUM_FORWARD, SYMVAL_BOOLEAN_FORWARD, and | |
| 1005 SYMVAL_UNBOUND_MARKER. The SYMVAL_CONST_*_FORWARD cannot | |
| 1006 be buffer-local because they are unsettable; | |
| 1007 SYMVAL_DEFAULT_*_FORWARD cannot be buffer-local because that | |
| 1008 makes no sense; making SYMVAL_CURRENT_BUFFER_FORWARD buffer-local | |
| 1009 does not have much of an effect (it's already buffer-local); and | |
| 1010 SYMVAL_SELECTED_CONSOLE_FORWARD cannot be buffer-local because | |
| 1011 that's not currently implemented. | |
| 1012 | |
| 1013 | |
| 1014 3. symbol-value-varalias | |
| 1015 | |
| 1016 A symbol-value-varalias object is used for variables that | |
| 1017 are aliases for other variables. This object contains | |
| 1018 the symbol that this variable is aliased to. | |
| 1019 symbol-value-varalias objects cannot occur anywhere within | |
| 1020 a symbol-value-buffer-local object, and most of the | |
| 1021 low-level functions below do not accept them; you need | |
| 1022 to call follow_varalias_pointers to get the actual | |
| 1023 symbol to operate on. */ | |
| 1024 | |
| 1204 | 1025 static const struct memory_description symbol_value_buffer_local_description[] = { |
| 1026 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, default_value) }, | |
| 1027 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, current_value) }, | |
| 1028 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, current_buffer) }, | |
| 1029 { XD_LISP_OBJECT, offsetof (struct symbol_value_buffer_local, current_alist_element) }, | |
| 1030 { XD_END } | |
| 1031 }; | |
| 1032 | |
| 428 | 1033 static Lisp_Object |
| 1034 mark_symbol_value_buffer_local (Lisp_Object obj) | |
| 1035 { | |
| 1036 struct symbol_value_buffer_local *bfwd; | |
| 1037 | |
| 800 | 1038 #ifdef ERROR_CHECK_TYPES |
| 428 | 1039 assert (XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_BUFFER_LOCAL || |
| 1040 XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_SOME_BUFFER_LOCAL); | |
| 1041 #endif | |
| 1042 | |
| 1043 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (obj); | |
| 1044 mark_object (bfwd->default_value); | |
| 1045 mark_object (bfwd->current_value); | |
| 1046 mark_object (bfwd->current_buffer); | |
| 1047 return bfwd->current_alist_element; | |
| 1048 } | |
| 1049 | |
| 1204 | 1050 |
| 1051 static const struct memory_description symbol_value_lisp_magic_description[] = { | |
| 1052 { XD_LISP_OBJECT_ARRAY, offsetof (struct symbol_value_lisp_magic, handler), MAGIC_HANDLER_MAX }, | |
| 1053 { XD_LISP_OBJECT_ARRAY, offsetof (struct symbol_value_lisp_magic, harg), MAGIC_HANDLER_MAX }, | |
| 1054 { XD_LISP_OBJECT, offsetof (struct symbol_value_lisp_magic, shadowed) }, | |
| 1055 { XD_END } | |
| 1056 }; | |
| 1057 | |
| 428 | 1058 static Lisp_Object |
| 1059 mark_symbol_value_lisp_magic (Lisp_Object obj) | |
| 1060 { | |
| 1061 struct symbol_value_lisp_magic *bfwd; | |
| 1062 int i; | |
| 1063 | |
| 1064 assert (XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_LISP_MAGIC); | |
| 1065 | |
| 1066 bfwd = XSYMBOL_VALUE_LISP_MAGIC (obj); | |
| 1067 for (i = 0; i < MAGIC_HANDLER_MAX; i++) | |
| 1068 { | |
| 1069 mark_object (bfwd->handler[i]); | |
| 1070 mark_object (bfwd->harg[i]); | |
| 1071 } | |
| 1072 return bfwd->shadowed; | |
| 1073 } | |
| 1074 | |
| 1204 | 1075 static const struct memory_description symbol_value_varalias_description[] = { |
| 1076 { XD_LISP_OBJECT, offsetof (struct symbol_value_varalias, aliasee) }, | |
| 1077 { XD_LISP_OBJECT, offsetof (struct symbol_value_varalias, shadowed) }, | |
| 1078 { XD_END } | |
| 1079 }; | |
| 1080 | |
| 428 | 1081 static Lisp_Object |
| 1082 mark_symbol_value_varalias (Lisp_Object obj) | |
| 1083 { | |
| 1084 struct symbol_value_varalias *bfwd; | |
| 1085 | |
| 1086 assert (XSYMBOL_VALUE_MAGIC_TYPE (obj) == SYMVAL_VARALIAS); | |
| 1087 | |
| 1088 bfwd = XSYMBOL_VALUE_VARALIAS (obj); | |
| 1089 mark_object (bfwd->shadowed); | |
| 1090 return bfwd->aliasee; | |
| 1091 } | |
| 1092 | |
| 1093 /* Should never, ever be called. (except by an external debugger) */ | |
| 1094 void | |
| 2286 | 1095 print_symbol_value_magic (Lisp_Object obj, Lisp_Object printcharfun, |
| 1096 int UNUSED (escapeflag)) | |
| 428 | 1097 { |
| 800 | 1098 write_fmt_string (printcharfun, |
| 1099 "#<INTERNAL OBJECT (XEmacs bug?) (%s type %d) 0x%lx>", | |
| 1100 XRECORD_LHEADER_IMPLEMENTATION (obj)->name, | |
| 1101 XSYMBOL_VALUE_MAGIC_TYPE (obj), | |
| 1102 (long) XPNTR (obj)); | |
| 428 | 1103 } |
| 1104 | |
| 1204 | 1105 static const struct memory_description symbol_value_forward_description[] = { |
| 428 | 1106 { XD_END } |
| 1107 }; | |
| 1108 | |
| 934 | 1109 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-forward", |
| 1110 symbol_value_forward, | |
| 1111 1, /*dumpable-flag*/ | |
| 1112 0, | |
| 1113 print_symbol_value_magic, 0, 0, 0, | |
| 1114 symbol_value_forward_description, | |
| 1115 struct symbol_value_forward); | |
| 1116 | |
| 1117 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-buffer-local", | |
| 1118 symbol_value_buffer_local, | |
| 1119 1, /*dumpable-flag*/ | |
| 1120 mark_symbol_value_buffer_local, | |
| 1121 print_symbol_value_magic, 0, 0, 0, | |
| 1122 symbol_value_buffer_local_description, | |
| 1123 struct symbol_value_buffer_local); | |
| 1124 | |
| 1125 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-lisp-magic", | |
| 1126 symbol_value_lisp_magic, | |
| 1127 1, /*dumpable-flag*/ | |
| 1128 mark_symbol_value_lisp_magic, | |
| 1129 print_symbol_value_magic, 0, 0, 0, | |
| 1130 symbol_value_lisp_magic_description, | |
| 1131 struct symbol_value_lisp_magic); | |
| 1132 | |
| 1133 DEFINE_LRECORD_IMPLEMENTATION ("symbol-value-varalias", | |
| 1134 symbol_value_varalias, | |
| 1135 1, /*dumpable-flag*/ | |
| 1136 mark_symbol_value_varalias, | |
| 1137 print_symbol_value_magic, 0, 0, 0, | |
| 1138 symbol_value_varalias_description, | |
| 1139 struct symbol_value_varalias); | |
| 1140 | |
| 428 | 1141 |
| 1142 /* Getting and setting values of symbols */ | |
| 1143 | |
| 1144 /* Given the raw contents of a symbol value cell, return the Lisp value of | |
| 1145 the symbol. However, VALCONTENTS cannot be a symbol-value-buffer-local, | |
| 1146 symbol-value-lisp-magic, or symbol-value-varalias. | |
| 1147 | |
| 1148 BUFFER specifies a buffer, and is used for built-in buffer-local | |
| 1149 variables, which are of type SYMVAL_CURRENT_BUFFER_FORWARD. | |
| 1150 Note that such variables are never encapsulated in a | |
| 1151 symbol-value-buffer-local structure. | |
| 1152 | |
| 1153 CONSOLE specifies a console, and is used for built-in console-local | |
| 1154 variables, which are of type SYMVAL_SELECTED_CONSOLE_FORWARD. | |
| 1155 Note that such variables are (currently) never encapsulated in a | |
| 1156 symbol-value-buffer-local structure. | |
| 1157 */ | |
| 1158 | |
| 1159 static Lisp_Object | |
| 1160 do_symval_forwarding (Lisp_Object valcontents, struct buffer *buffer, | |
| 1161 struct console *console) | |
| 1162 { | |
| 442 | 1163 const struct symbol_value_forward *fwd; |
| 428 | 1164 |
| 1165 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 1166 return valcontents; | |
| 1167 | |
| 1168 fwd = XSYMBOL_VALUE_FORWARD (valcontents); | |
| 1169 switch (fwd->magic.type) | |
| 1170 { | |
| 1171 case SYMVAL_FIXNUM_FORWARD: | |
| 1172 case SYMVAL_CONST_FIXNUM_FORWARD: | |
| 458 | 1173 return make_int (*((Fixnum *)symbol_value_forward_forward (fwd))); |
| 428 | 1174 |
| 1175 case SYMVAL_BOOLEAN_FORWARD: | |
| 1176 case SYMVAL_CONST_BOOLEAN_FORWARD: | |
| 1177 return *((int *)symbol_value_forward_forward (fwd)) ? Qt : Qnil; | |
| 1178 | |
| 1179 case SYMVAL_OBJECT_FORWARD: | |
| 1180 case SYMVAL_CONST_OBJECT_FORWARD: | |
| 1181 case SYMVAL_CONST_SPECIFIER_FORWARD: | |
| 1182 return *((Lisp_Object *)symbol_value_forward_forward (fwd)); | |
| 1183 | |
| 1184 case SYMVAL_DEFAULT_BUFFER_FORWARD: | |
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1185 return (*((Lisp_Object *)((Rawbyte *) XBUFFER (Vbuffer_defaults) |
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1186 + ((Rawbyte *)symbol_value_forward_forward (fwd) |
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1187 - (Rawbyte *)&buffer_local_flags)))); |
| 428 | 1188 |
| 1189 | |
| 1190 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 1191 case SYMVAL_CONST_CURRENT_BUFFER_FORWARD: | |
| 1192 assert (buffer); | |
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1193 return (*((Lisp_Object *)((Rawbyte *)buffer |
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1194 + ((Rawbyte *)symbol_value_forward_forward (fwd) |
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1195 - (Rawbyte *)&buffer_local_flags)))); |
| 428 | 1196 |
| 1197 case SYMVAL_DEFAULT_CONSOLE_FORWARD: | |
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1198 return (*((Lisp_Object *)((Rawbyte *) XCONSOLE (Vconsole_defaults) |
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1199 + ((Rawbyte *)symbol_value_forward_forward (fwd) |
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1200 - (Rawbyte *)&console_local_flags)))); |
| 428 | 1201 |
| 1202 case SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 1203 case SYMVAL_CONST_SELECTED_CONSOLE_FORWARD: | |
| 1204 assert (console); | |
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1205 return (*((Lisp_Object *)((Rawbyte *)console |
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1206 + ((Rawbyte *)symbol_value_forward_forward (fwd) |
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1207 - (Rawbyte *)&console_local_flags)))); |
| 428 | 1208 |
| 1209 case SYMVAL_UNBOUND_MARKER: | |
| 1210 return valcontents; | |
| 1211 | |
| 1212 default: | |
| 2500 | 1213 ABORT (); |
| 428 | 1214 } |
| 1215 return Qnil; /* suppress compiler warning */ | |
| 1216 } | |
| 1217 | |
| 1218 /* Set the value of default-buffer-local variable SYM to VALUE. */ | |
| 1219 | |
| 1220 static void | |
| 1221 set_default_buffer_slot_variable (Lisp_Object sym, | |
| 1222 Lisp_Object value) | |
| 1223 { | |
| 1224 /* Handle variables like case-fold-search that have special slots in | |
| 1225 the buffer. Make them work apparently like buffer_local variables. | |
| 1226 */ | |
| 1227 /* At this point, the value cell may not contain a symbol-value-varalias | |
| 1228 or symbol-value-buffer-local, and if there's a handler, we should | |
| 1229 have already called it. */ | |
| 1230 Lisp_Object valcontents = fetch_value_maybe_past_magic (sym, Qt); | |
| 442 | 1231 const struct symbol_value_forward *fwd |
| 428 | 1232 = XSYMBOL_VALUE_FORWARD (valcontents); |
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1233 int offset = ((Rawbyte *) symbol_value_forward_forward (fwd) |
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1234 - (Rawbyte *) &buffer_local_flags); |
| 428 | 1235 int mask = XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd))); |
| 1236 int (*magicfun) (Lisp_Object simm, Lisp_Object *val, Lisp_Object in_object, | |
| 1237 int flags) = symbol_value_forward_magicfun (fwd); | |
| 1238 | |
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1239 *((Lisp_Object *) (offset + (Rawbyte *) XBUFFER (Vbuffer_defaults))) |
| 428 | 1240 = value; |
| 1241 | |
| 1242 if (mask > 0) /* Not always per-buffer */ | |
| 1243 { | |
| 1244 /* Set value in each buffer which hasn't shadowed the default */ | |
| 1245 LIST_LOOP_2 (elt, Vbuffer_alist) | |
| 1246 { | |
| 1247 struct buffer *b = XBUFFER (XCDR (elt)); | |
| 1248 if (!(b->local_var_flags & mask)) | |
| 1249 { | |
| 1250 if (magicfun) | |
| 771 | 1251 magicfun (sym, &value, wrap_buffer (b), 0); |
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1252 *((Lisp_Object *) (offset + (Rawbyte *) b)) = value; |
| 428 | 1253 } |
| 1254 } | |
| 1255 } | |
| 1256 } | |
| 1257 | |
| 1258 /* Set the value of default-console-local variable SYM to VALUE. */ | |
| 1259 | |
| 1260 static void | |
| 1261 set_default_console_slot_variable (Lisp_Object sym, | |
| 1262 Lisp_Object value) | |
| 1263 { | |
| 1264 /* Handle variables like case-fold-search that have special slots in | |
| 1265 the console. Make them work apparently like console_local variables. | |
| 1266 */ | |
| 1267 /* At this point, the value cell may not contain a symbol-value-varalias | |
| 1268 or symbol-value-buffer-local, and if there's a handler, we should | |
| 1269 have already called it. */ | |
| 1270 Lisp_Object valcontents = fetch_value_maybe_past_magic (sym, Qt); | |
| 442 | 1271 const struct symbol_value_forward *fwd |
| 428 | 1272 = XSYMBOL_VALUE_FORWARD (valcontents); |
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1273 int offset = ((Rawbyte *) symbol_value_forward_forward (fwd) |
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1274 - (Rawbyte *) &console_local_flags); |
| 428 | 1275 int mask = XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd))); |
| 1276 int (*magicfun) (Lisp_Object simm, Lisp_Object *val, Lisp_Object in_object, | |
| 1277 int flags) = symbol_value_forward_magicfun (fwd); | |
| 1278 | |
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1279 *((Lisp_Object *) (offset + (Rawbyte *) XCONSOLE (Vconsole_defaults))) |
| 428 | 1280 = value; |
| 1281 | |
| 1282 if (mask > 0) /* Not always per-console */ | |
| 1283 { | |
| 1284 /* Set value in each console which hasn't shadowed the default */ | |
| 1285 LIST_LOOP_2 (console, Vconsole_list) | |
| 1286 { | |
| 1287 struct console *d = XCONSOLE (console); | |
| 1288 if (!(d->local_var_flags & mask)) | |
| 1289 { | |
| 1290 if (magicfun) | |
| 1291 magicfun (sym, &value, console, 0); | |
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1292 *((Lisp_Object *) (offset + (Rawbyte *) d)) = value; |
| 428 | 1293 } |
| 1294 } | |
| 1295 } | |
| 1296 } | |
| 1297 | |
| 1298 /* Store NEWVAL into SYM. | |
| 1299 | |
| 1300 SYM's value slot may *not* be types (5) or (6) above, | |
| 1301 i.e. no symbol-value-varalias objects. (You should have | |
| 1302 forwarded past all of these.) | |
| 1303 | |
| 1304 SYM should not be an unsettable symbol or a symbol with | |
| 1305 a magic `set-value' handler (unless you want to explicitly | |
| 1306 ignore this handler). | |
| 1307 | |
| 1308 OVALUE is the current value of SYM, but forwarded past any | |
| 1309 symbol-value-buffer-local and symbol-value-lisp-magic objects. | |
| 1310 (i.e. if SYM is a symbol-value-buffer-local, OVALUE should be | |
| 1311 the contents of its current-value cell.) NEWVAL may only be | |
| 1312 a simple value or Qunbound. If SYM is a symbol-value-buffer-local, | |
| 1313 this function will only modify its current-value cell, which should | |
| 1314 already be set up to point to the current buffer. | |
| 1315 */ | |
| 1316 | |
| 1317 static void | |
| 1318 store_symval_forwarding (Lisp_Object sym, Lisp_Object ovalue, | |
| 1319 Lisp_Object newval) | |
| 1320 { | |
| 1321 if (!SYMBOL_VALUE_MAGIC_P (ovalue) || UNBOUNDP (ovalue)) | |
| 1322 { | |
| 1323 Lisp_Object *store_pointer = value_slot_past_magic (sym); | |
| 1324 | |
| 1325 if (SYMBOL_VALUE_BUFFER_LOCAL_P (*store_pointer)) | |
| 1326 store_pointer = | |
| 1327 &XSYMBOL_VALUE_BUFFER_LOCAL (*store_pointer)->current_value; | |
| 1328 | |
| 1329 assert (UNBOUNDP (*store_pointer) | |
| 1330 || !SYMBOL_VALUE_MAGIC_P (*store_pointer)); | |
| 1331 *store_pointer = newval; | |
| 1332 } | |
| 1333 else | |
| 1334 { | |
| 442 | 1335 const struct symbol_value_forward *fwd = XSYMBOL_VALUE_FORWARD (ovalue); |
| 428 | 1336 int (*magicfun) (Lisp_Object simm, Lisp_Object *val, |
| 1337 Lisp_Object in_object, int flags) | |
| 1338 = symbol_value_forward_magicfun (fwd); | |
| 1339 | |
| 1340 switch (XSYMBOL_VALUE_MAGIC_TYPE (ovalue)) | |
| 1341 { | |
| 1342 case SYMVAL_FIXNUM_FORWARD: | |
| 1343 CHECK_INT (newval); | |
| 1344 if (magicfun) | |
| 1345 magicfun (sym, &newval, Qnil, 0); | |
| 458 | 1346 *((Fixnum *) symbol_value_forward_forward (fwd)) = XINT (newval); |
| 428 | 1347 return; |
| 1348 | |
| 1349 case SYMVAL_BOOLEAN_FORWARD: | |
| 1350 if (magicfun) | |
| 1351 magicfun (sym, &newval, Qnil, 0); | |
| 1352 *((int *) symbol_value_forward_forward (fwd)) | |
| 1353 = !NILP (newval); | |
| 1354 return; | |
| 1355 | |
| 1356 case SYMVAL_OBJECT_FORWARD: | |
| 1357 if (magicfun) | |
| 1358 magicfun (sym, &newval, Qnil, 0); | |
| 1359 *((Lisp_Object *) symbol_value_forward_forward (fwd)) = newval; | |
| 1360 return; | |
| 1361 | |
| 1362 case SYMVAL_DEFAULT_BUFFER_FORWARD: | |
| 1363 set_default_buffer_slot_variable (sym, newval); | |
| 1364 return; | |
| 1365 | |
| 1366 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 1367 if (magicfun) | |
| 771 | 1368 magicfun (sym, &newval, wrap_buffer (current_buffer), 0); |
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1369 *((Lisp_Object *) ((Rawbyte *) current_buffer |
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1370 + ((Rawbyte *) symbol_value_forward_forward (fwd) |
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1371 - (Rawbyte *) &buffer_local_flags))) |
| 428 | 1372 = newval; |
| 1373 return; | |
| 1374 | |
| 1375 case SYMVAL_DEFAULT_CONSOLE_FORWARD: | |
| 1376 set_default_console_slot_variable (sym, newval); | |
| 1377 return; | |
| 1378 | |
| 1379 case SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 1380 if (magicfun) | |
| 1381 magicfun (sym, &newval, Vselected_console, 0); | |
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1382 *((Lisp_Object *) ((Rawbyte *) XCONSOLE (Vselected_console) |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
1383 + ((Rawbyte *) symbol_value_forward_forward (fwd) |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
1384 - (Rawbyte *) &console_local_flags))) |
| 428 | 1385 = newval; |
| 1386 return; | |
| 1387 | |
| 1388 default: | |
| 2500 | 1389 ABORT (); |
| 428 | 1390 } |
| 1391 } | |
| 1392 } | |
| 1393 | |
| 1394 /* Given a per-buffer variable SYMBOL and its raw value-cell contents | |
| 1395 BFWD, locate and return a pointer to the element in BUFFER's | |
| 1396 local_var_alist for SYMBOL. The return value will be Qnil if | |
| 1397 BUFFER does not have its own value for SYMBOL (i.e. the default | |
| 1398 value is seen in that buffer). | |
| 1399 */ | |
| 1400 | |
| 1401 static Lisp_Object | |
| 1402 buffer_local_alist_element (struct buffer *buffer, Lisp_Object symbol, | |
| 1403 struct symbol_value_buffer_local *bfwd) | |
| 1404 { | |
| 1405 if (!NILP (bfwd->current_buffer) && | |
| 1406 XBUFFER (bfwd->current_buffer) == buffer) | |
| 1407 /* This is just an optimization of the below. */ | |
| 1408 return bfwd->current_alist_element; | |
| 1409 else | |
| 1410 return assq_no_quit (symbol, buffer->local_var_alist); | |
| 1411 } | |
| 1412 | |
| 1413 /* [Remember that the slot that mirrors CURRENT-VALUE in the | |
| 1414 symbol-value-buffer-local of a per-buffer variable -- i.e. the | |
| 1415 slot in CURRENT-BUFFER's local_var_alist, or the DEFAULT-VALUE | |
| 1416 slot -- may be out of date.] | |
| 1417 | |
| 1418 Write out any cached value in buffer-local variable SYMBOL's | |
| 1419 buffer-local structure, which is passed in as BFWD. | |
| 1420 */ | |
| 1421 | |
| 1422 static void | |
| 2286 | 1423 write_out_buffer_local_cache (Lisp_Object UNUSED (symbol), |
| 428 | 1424 struct symbol_value_buffer_local *bfwd) |
| 1425 { | |
| 1426 if (!NILP (bfwd->current_buffer)) | |
| 1427 { | |
| 1428 /* We pass 0 for BUFFER because only SYMVAL_CURRENT_BUFFER_FORWARD | |
| 1429 uses it, and that type cannot be inside a symbol-value-buffer-local */ | |
| 1430 Lisp_Object cval = do_symval_forwarding (bfwd->current_value, 0, 0); | |
| 1431 if (NILP (bfwd->current_alist_element)) | |
| 1432 /* current_value may be updated more recently than default_value */ | |
| 1433 bfwd->default_value = cval; | |
| 1434 else | |
| 1435 Fsetcdr (bfwd->current_alist_element, cval); | |
| 1436 } | |
| 1437 } | |
| 1438 | |
| 1439 /* SYM is a buffer-local variable, and BFWD is its buffer-local structure. | |
| 1440 Set up BFWD's cache for validity in buffer BUF. This assumes that | |
| 1441 the cache is currently in a consistent state (this can include | |
| 1442 not having any value cached, if BFWD->CURRENT_BUFFER is nil). | |
| 1443 | |
| 1444 If the cache is already set up for BUF, this function does nothing | |
| 1445 at all. | |
| 1446 | |
| 1447 Otherwise, if SYM forwards out to a C variable, this also forwards | |
| 1448 SYM's value in BUF out to the variable. Therefore, you generally | |
| 1449 only want to call this when BUF is, or is about to become, the | |
| 1450 current buffer. | |
| 1451 | |
| 1452 (Otherwise, you can just retrieve the value without changing the | |
| 1453 cache, at the expense of slower retrieval.) | |
| 1454 */ | |
| 1455 | |
| 1456 static void | |
| 1457 set_up_buffer_local_cache (Lisp_Object sym, | |
| 1458 struct symbol_value_buffer_local *bfwd, | |
| 1459 struct buffer *buf, | |
| 1460 Lisp_Object new_alist_el, | |
| 1461 int set_it_p) | |
| 1462 { | |
| 1463 Lisp_Object new_val; | |
| 1464 | |
| 1465 if (!NILP (bfwd->current_buffer) | |
| 1466 && buf == XBUFFER (bfwd->current_buffer)) | |
| 1467 /* Cache is already set up. */ | |
| 1468 return; | |
| 1469 | |
| 1470 /* Flush out the old cache. */ | |
| 1471 write_out_buffer_local_cache (sym, bfwd); | |
| 1472 | |
| 1473 /* Retrieve the new alist element and new value. */ | |
| 1474 if (NILP (new_alist_el) | |
| 1475 && set_it_p) | |
| 1476 new_alist_el = buffer_local_alist_element (buf, sym, bfwd); | |
| 1477 | |
| 1478 if (NILP (new_alist_el)) | |
| 1479 new_val = bfwd->default_value; | |
| 1480 else | |
| 1481 new_val = Fcdr (new_alist_el); | |
| 1482 | |
| 1483 bfwd->current_alist_element = new_alist_el; | |
| 793 | 1484 bfwd->current_buffer = wrap_buffer (buf); |
| 428 | 1485 |
| 1486 /* Now store the value into the current-value slot. | |
| 1487 We don't simply write it there, because the current-value | |
| 1488 slot might be a forwarding pointer, in which case we need | |
| 1489 to instead write the value into the C variable. | |
| 1490 | |
| 1491 We might also want to call a magic function. | |
| 1492 | |
| 1493 So instead, we call this function. */ | |
| 1494 store_symval_forwarding (sym, bfwd->current_value, new_val); | |
| 1495 } | |
| 1496 | |
| 446 | 1497 |
| 1498 /* SYM is a buffer-local variable, and BFWD is its buffer-local structure. | |
| 1499 Flush the cache. BFWD->CURRENT_BUFFER will be nil after this operation. | |
| 1500 */ | |
| 1501 | |
| 1502 static void | |
| 1503 flush_buffer_local_cache (Lisp_Object sym, | |
| 1504 struct symbol_value_buffer_local *bfwd) | |
| 1505 { | |
| 1506 if (NILP (bfwd->current_buffer)) | |
| 1507 /* Cache is already flushed. */ | |
| 1508 return; | |
| 1509 | |
| 1510 /* Flush out the old cache. */ | |
| 1511 write_out_buffer_local_cache (sym, bfwd); | |
| 1512 | |
| 1513 bfwd->current_alist_element = Qnil; | |
| 1514 bfwd->current_buffer = Qnil; | |
| 1515 | |
| 1516 /* Now store default the value into the current-value slot. | |
| 1517 We don't simply write it there, because the current-value | |
| 1518 slot might be a forwarding pointer, in which case we need | |
| 1519 to instead write the value into the C variable. | |
| 1520 | |
| 1521 We might also want to call a magic function. | |
| 1522 | |
| 1523 So instead, we call this function. */ | |
| 1524 store_symval_forwarding (sym, bfwd->current_value, bfwd->default_value); | |
| 1525 } | |
| 1526 | |
| 1527 /* Flush all the buffer-local variable caches. Whoever has a | |
| 1528 non-interned buffer-local variable will be spanked. Whoever has a | |
| 1529 magic variable that interns or uninterns symbols... I don't even | |
| 1530 want to think about it. | |
| 1531 */ | |
| 1532 | |
| 1533 void | |
| 1534 flush_all_buffer_local_cache (void) | |
| 1535 { | |
| 1536 Lisp_Object *syms = XVECTOR_DATA (Vobarray); | |
| 1537 long count = XVECTOR_LENGTH (Vobarray); | |
| 1538 long i; | |
| 1539 | |
| 1540 for (i=0; i<count; i++) | |
| 1541 { | |
| 1542 Lisp_Object sym = syms[i]; | |
| 1543 Lisp_Object value; | |
| 1544 | |
| 1545 if (!ZEROP (sym)) | |
| 1546 for(;;) | |
| 1547 { | |
| 1548 Lisp_Symbol *next; | |
| 1549 assert (SYMBOLP (sym)); | |
| 1550 value = fetch_value_maybe_past_magic (sym, Qt); | |
| 1551 if (SYMBOL_VALUE_BUFFER_LOCAL_P (value)) | |
| 1552 flush_buffer_local_cache (sym, XSYMBOL_VALUE_BUFFER_LOCAL (value)); | |
| 1553 | |
| 1554 next = symbol_next (XSYMBOL (sym)); | |
| 1555 if (!next) | |
| 1556 break; | |
| 793 | 1557 sym = wrap_symbol (next); |
| 446 | 1558 } |
| 1559 } | |
| 1560 } | |
| 1561 | |
| 428 | 1562 |
| 1563 void | |
| 1564 kill_buffer_local_variables (struct buffer *buf) | |
| 1565 { | |
| 1566 Lisp_Object prev = Qnil; | |
| 1567 Lisp_Object alist; | |
| 1568 | |
| 1569 /* Any which are supposed to be permanent, | |
| 1570 make local again, with the same values they had. */ | |
| 1571 | |
| 1572 for (alist = buf->local_var_alist; !NILP (alist); alist = XCDR (alist)) | |
| 1573 { | |
| 1574 Lisp_Object sym = XCAR (XCAR (alist)); | |
| 1575 struct symbol_value_buffer_local *bfwd; | |
| 1576 /* Variables with a symbol-value-varalias should not be here | |
| 1577 (we should have forwarded past them) and there must be a | |
| 1578 symbol-value-buffer-local. If there's a symbol-value-lisp-magic, | |
| 1579 just forward past it; if the variable has a handler, it was | |
| 1580 already called. */ | |
| 1581 Lisp_Object value = fetch_value_maybe_past_magic (sym, Qt); | |
| 1582 | |
| 1583 assert (SYMBOL_VALUE_BUFFER_LOCAL_P (value)); | |
| 1584 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (value); | |
| 1585 | |
| 1586 if (!NILP (Fget (sym, Qpermanent_local, Qnil))) | |
| 1587 /* prev points to the last alist element that is still | |
| 1588 staying around, so *only* update it now. This didn't | |
| 1589 used to be the case; this bug has been around since | |
| 1590 mly's rewrite two years ago! */ | |
| 1591 prev = alist; | |
| 1592 else | |
| 1593 { | |
| 1594 /* Really truly kill it. */ | |
| 1595 if (!NILP (prev)) | |
| 1596 XCDR (prev) = XCDR (alist); | |
| 1597 else | |
| 1598 buf->local_var_alist = XCDR (alist); | |
| 1599 | |
| 1600 /* We just effectively changed the value for this variable | |
| 1601 in BUF. So: */ | |
| 1602 | |
| 1603 /* (1) If the cache is caching BUF, invalidate the cache. */ | |
| 1604 if (!NILP (bfwd->current_buffer) && | |
| 1605 buf == XBUFFER (bfwd->current_buffer)) | |
| 1606 bfwd->current_buffer = Qnil; | |
| 1607 | |
| 1608 /* (2) If we changed the value in current_buffer and this | |
| 1609 variable forwards to a C variable, we need to change the | |
| 1610 value of the C variable. set_up_buffer_local_cache() | |
| 1611 will do this. It doesn't hurt to do it whenever | |
| 1612 BUF == current_buffer, so just go ahead and do that. */ | |
| 1613 if (buf == current_buffer) | |
| 1614 set_up_buffer_local_cache (sym, bfwd, buf, Qnil, 0); | |
| 1615 } | |
| 1616 } | |
| 1617 } | |
| 1618 | |
| 1619 static Lisp_Object | |
| 1620 find_symbol_value_1 (Lisp_Object sym, struct buffer *buf, | |
| 1621 struct console *con, int swap_it_in, | |
| 1622 Lisp_Object symcons, int set_it_p) | |
| 1623 { | |
| 1624 Lisp_Object valcontents; | |
| 1625 | |
| 1626 retry: | |
| 1627 valcontents = XSYMBOL (sym)->value; | |
| 1628 | |
| 1629 retry_2: | |
| 1630 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 1631 return valcontents; | |
| 1632 | |
| 1633 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 1634 { | |
| 1635 case SYMVAL_LISP_MAGIC: | |
| 1636 /* #### kludge */ | |
| 1637 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 1638 /* semi-change-o */ | |
| 1639 goto retry_2; | |
| 1640 | |
| 1641 case SYMVAL_VARALIAS: | |
| 1642 sym = follow_varalias_pointers (sym, Qt /* #### kludge */); | |
| 1643 symcons = Qnil; | |
| 1644 /* presto change-o! */ | |
| 1645 goto retry; | |
| 1646 | |
| 1647 case SYMVAL_BUFFER_LOCAL: | |
| 1648 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 1649 { | |
| 1650 struct symbol_value_buffer_local *bfwd | |
| 1651 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 1652 | |
| 1653 if (swap_it_in) | |
| 1654 { | |
| 1655 set_up_buffer_local_cache (sym, bfwd, buf, symcons, set_it_p); | |
| 1656 valcontents = bfwd->current_value; | |
| 1657 } | |
| 1658 else | |
| 1659 { | |
| 1660 if (!NILP (bfwd->current_buffer) && | |
| 1661 buf == XBUFFER (bfwd->current_buffer)) | |
| 1662 valcontents = bfwd->current_value; | |
| 1663 else if (NILP (symcons)) | |
| 1664 { | |
| 1665 if (set_it_p) | |
| 1666 valcontents = assq_no_quit (sym, buf->local_var_alist); | |
| 1667 if (NILP (valcontents)) | |
| 1668 valcontents = bfwd->default_value; | |
| 1669 else | |
| 1670 valcontents = XCDR (valcontents); | |
| 1671 } | |
| 1672 else | |
| 1673 valcontents = XCDR (symcons); | |
| 1674 } | |
| 1675 break; | |
| 1676 } | |
| 1677 | |
| 1678 default: | |
| 1679 break; | |
| 1680 } | |
| 1681 return do_symval_forwarding (valcontents, buf, con); | |
| 1682 } | |
| 1683 | |
| 1684 | |
| 1685 /* Find the value of a symbol in BUFFER, returning Qunbound if it's not | |
| 1686 bound. Note that it must not be possible to QUIT within this | |
| 1687 function. */ | |
| 1688 | |
| 1689 Lisp_Object | |
| 1690 symbol_value_in_buffer (Lisp_Object sym, Lisp_Object buffer) | |
| 1691 { | |
| 1692 struct buffer *buf; | |
| 1693 | |
| 1694 CHECK_SYMBOL (sym); | |
| 1695 | |
| 1696 if (NILP (buffer)) | |
| 1697 buf = current_buffer; | |
| 1698 else | |
| 1699 { | |
| 1700 CHECK_BUFFER (buffer); | |
| 1701 buf = XBUFFER (buffer); | |
| 1702 } | |
| 1703 | |
| 1704 return find_symbol_value_1 (sym, buf, | |
| 1705 /* If it bombs out at startup due to a | |
| 1706 Lisp error, this may be nil. */ | |
| 1707 CONSOLEP (Vselected_console) | |
| 1708 ? XCONSOLE (Vselected_console) : 0, 0, Qnil, 1); | |
| 1709 } | |
| 1710 | |
| 1711 static Lisp_Object | |
| 1712 symbol_value_in_console (Lisp_Object sym, Lisp_Object console) | |
| 1713 { | |
| 1714 CHECK_SYMBOL (sym); | |
| 1715 | |
| 1716 if (NILP (console)) | |
| 1717 console = Vselected_console; | |
| 1718 else | |
| 1719 CHECK_CONSOLE (console); | |
| 1720 | |
| 1721 return find_symbol_value_1 (sym, current_buffer, XCONSOLE (console), 0, | |
| 1722 Qnil, 1); | |
| 1723 } | |
| 1724 | |
| 1725 /* Return the current value of SYM. The difference between this function | |
| 1726 and calling symbol_value_in_buffer with a BUFFER of Qnil is that | |
| 1727 this updates the CURRENT_VALUE slot of buffer-local variables to | |
| 1728 point to the current buffer, while symbol_value_in_buffer doesn't. */ | |
| 1729 | |
| 1730 Lisp_Object | |
| 1731 find_symbol_value (Lisp_Object sym) | |
| 1732 { | |
| 1733 /* WARNING: This function can be called when current_buffer is 0 | |
| 1734 and Vselected_console is Qnil, early in initialization. */ | |
| 1735 struct console *con; | |
| 1736 Lisp_Object valcontents; | |
| 1737 | |
| 1738 CHECK_SYMBOL (sym); | |
| 1739 | |
| 1740 valcontents = XSYMBOL (sym)->value; | |
| 1741 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 1742 return valcontents; | |
| 1743 | |
| 1744 if (CONSOLEP (Vselected_console)) | |
| 1745 con = XCONSOLE (Vselected_console); | |
| 1746 else | |
| 1747 { | |
| 1748 /* This can also get called while we're preparing to shutdown. | |
| 1749 #### What should really happen in that case? Should we | |
| 1750 actually fix things so we can't get here in that case? */ | |
| 1751 #ifndef PDUMP | |
| 1752 assert (!initialized || preparing_for_armageddon); | |
| 1753 #endif | |
| 1754 con = 0; | |
| 1755 } | |
| 1756 | |
| 1757 return find_symbol_value_1 (sym, current_buffer, con, 1, Qnil, 1); | |
| 1758 } | |
| 1759 | |
| 1760 /* This is an optimized function for quick lookup of buffer local symbols | |
| 1761 by avoiding O(n) search. This will work when either: | |
| 1762 a) We have already found the symbol e.g. by traversing local_var_alist. | |
| 1763 or | |
| 1764 b) We know that the symbol will not be found in the current buffer's | |
| 1765 list of local variables. | |
| 1766 In the former case, find_it_p is 1 and symbol_cons is the element from | |
| 1767 local_var_alist. In the latter case, find_it_p is 0 and symbol_cons | |
| 1768 is the symbol. | |
| 1769 | |
| 1770 This function is called from set_buffer_internal which does both of these | |
| 1771 things. */ | |
| 1772 | |
| 1773 Lisp_Object | |
| 1774 find_symbol_value_quickly (Lisp_Object symbol_cons, int find_it_p) | |
| 1775 { | |
| 1776 /* WARNING: This function can be called when current_buffer is 0 | |
| 1777 and Vselected_console is Qnil, early in initialization. */ | |
| 1778 struct console *con; | |
| 1779 Lisp_Object sym = find_it_p ? XCAR (symbol_cons) : symbol_cons; | |
| 1780 | |
| 1781 CHECK_SYMBOL (sym); | |
| 1782 if (CONSOLEP (Vselected_console)) | |
| 1783 con = XCONSOLE (Vselected_console); | |
| 1784 else | |
| 1785 { | |
| 1786 /* This can also get called while we're preparing to shutdown. | |
| 1787 #### What should really happen in that case? Should we | |
| 1788 actually fix things so we can't get here in that case? */ | |
| 1789 #ifndef PDUMP | |
| 1790 assert (!initialized || preparing_for_armageddon); | |
| 1791 #endif | |
| 1792 con = 0; | |
| 1793 } | |
| 1794 | |
| 1795 return find_symbol_value_1 (sym, current_buffer, con, 1, | |
| 1796 find_it_p ? symbol_cons : Qnil, | |
| 1797 find_it_p); | |
| 1798 } | |
| 1799 | |
| 1800 DEFUN ("symbol-value", Fsymbol_value, 1, 1, 0, /* | |
| 1801 Return SYMBOL's value. Error if that is void. | |
| 1802 */ | |
| 1803 (symbol)) | |
| 1804 { | |
| 1805 Lisp_Object val = find_symbol_value (symbol); | |
| 1806 | |
| 1807 if (UNBOUNDP (val)) | |
| 1808 return Fsignal (Qvoid_variable, list1 (symbol)); | |
| 1809 else | |
| 1810 return val; | |
| 1811 } | |
| 1812 | |
| 1813 DEFUN ("set", Fset, 2, 2, 0, /* | |
| 1814 Set SYMBOL's value to NEWVAL, and return NEWVAL. | |
| 1815 */ | |
| 1816 (symbol, newval)) | |
| 1817 { | |
| 1818 REGISTER Lisp_Object valcontents; | |
| 440 | 1819 Lisp_Symbol *sym; |
| 428 | 1820 /* remember, we're called by Fmakunbound() as well */ |
| 1821 | |
| 1822 CHECK_SYMBOL (symbol); | |
| 1823 | |
| 1824 retry: | |
| 1825 sym = XSYMBOL (symbol); | |
| 1826 valcontents = sym->value; | |
| 1827 | |
| 1828 if (EQ (symbol, Qnil) || | |
| 1829 EQ (symbol, Qt) || | |
| 1830 SYMBOL_IS_KEYWORD (symbol)) | |
| 1831 reject_constant_symbols (symbol, newval, 0, | |
| 1832 UNBOUNDP (newval) ? Qmakunbound : Qset); | |
| 1833 | |
| 1834 if (!SYMBOL_VALUE_MAGIC_P (valcontents) || UNBOUNDP (valcontents)) | |
| 1835 { | |
| 1836 sym->value = newval; | |
| 1837 return newval; | |
| 1838 } | |
| 1839 | |
| 1840 reject_constant_symbols (symbol, newval, 0, | |
| 1841 UNBOUNDP (newval) ? Qmakunbound : Qset); | |
| 1842 | |
| 1843 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 1844 { | |
| 1845 case SYMVAL_LISP_MAGIC: | |
| 1846 { | |
| 1847 if (UNBOUNDP (newval)) | |
| 440 | 1848 { |
| 1849 maybe_call_magic_handler (symbol, Qmakunbound, 0); | |
| 1850 return XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed = Qunbound; | |
| 1851 } | |
| 428 | 1852 else |
| 440 | 1853 { |
| 1854 maybe_call_magic_handler (symbol, Qset, 1, newval); | |
| 1855 return XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed = newval; | |
| 1856 } | |
| 428 | 1857 } |
| 1858 | |
| 1859 case SYMVAL_VARALIAS: | |
| 1860 symbol = follow_varalias_pointers (symbol, | |
| 1861 UNBOUNDP (newval) | |
| 1862 ? Qmakunbound : Qset); | |
| 1863 /* presto change-o! */ | |
| 1864 goto retry; | |
| 1865 | |
| 1866 case SYMVAL_FIXNUM_FORWARD: | |
| 996 | 1867 case SYMVAL_CONST_FIXNUM_FORWARD: |
| 428 | 1868 case SYMVAL_BOOLEAN_FORWARD: |
| 996 | 1869 case SYMVAL_CONST_BOOLEAN_FORWARD: |
| 428 | 1870 case SYMVAL_DEFAULT_BUFFER_FORWARD: |
| 1871 case SYMVAL_DEFAULT_CONSOLE_FORWARD: | |
| 1872 if (UNBOUNDP (newval)) | |
| 996 | 1873 { |
| 1874 #ifdef HAVE_SHLIB | |
| 1875 if (unloading_module) | |
| 1876 { | |
| 1877 sym->value = newval; | |
| 1878 return newval; | |
| 1879 } | |
| 1880 else | |
| 1881 #endif | |
| 1882 invalid_change ("Cannot makunbound", symbol); | |
| 1883 } | |
| 1884 break; | |
| 1885 | |
| 1886 case SYMVAL_OBJECT_FORWARD: | |
| 1887 case SYMVAL_CONST_OBJECT_FORWARD: | |
| 1888 if (UNBOUNDP (newval)) | |
| 1889 { | |
| 1890 #ifdef HAVE_SHLIB | |
| 1891 if (unloading_module) | |
| 1892 { | |
| 1111 | 1893 unstaticpro_nodump ((Lisp_Object *) |
| 1894 symbol_value_forward_forward | |
| 996 | 1895 (XSYMBOL_VALUE_FORWARD (valcontents))); |
| 1896 sym->value = newval; | |
| 1897 return newval; | |
| 1898 } | |
| 1899 else | |
| 1900 #endif | |
| 1901 invalid_change ("Cannot makunbound", symbol); | |
| 1902 } | |
| 428 | 1903 break; |
| 1904 | |
| 1905 /* case SYMVAL_UNBOUND_MARKER: break; */ | |
| 1906 | |
| 1907 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 1908 { | |
| 442 | 1909 const struct symbol_value_forward *fwd |
| 428 | 1910 = XSYMBOL_VALUE_FORWARD (valcontents); |
| 1911 int mask = XINT (*((Lisp_Object *) | |
| 1912 symbol_value_forward_forward (fwd))); | |
| 1913 if (mask > 0) | |
| 1914 /* Setting this variable makes it buffer-local */ | |
| 1915 current_buffer->local_var_flags |= mask; | |
| 1916 break; | |
| 1917 } | |
| 1918 | |
| 1919 case SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 1920 { | |
| 442 | 1921 const struct symbol_value_forward *fwd |
| 428 | 1922 = XSYMBOL_VALUE_FORWARD (valcontents); |
| 1923 int mask = XINT (*((Lisp_Object *) | |
| 1924 symbol_value_forward_forward (fwd))); | |
| 1925 if (mask > 0) | |
| 1926 /* Setting this variable makes it console-local */ | |
| 1927 XCONSOLE (Vselected_console)->local_var_flags |= mask; | |
| 1928 break; | |
| 1929 } | |
| 1930 | |
| 1931 case SYMVAL_BUFFER_LOCAL: | |
| 1932 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 1933 { | |
| 1934 /* If we want to examine or set the value and | |
| 1935 CURRENT-BUFFER is current, we just examine or set | |
| 1936 CURRENT-VALUE. If CURRENT-BUFFER is not current, we | |
| 1937 store the current CURRENT-VALUE value into | |
| 1938 CURRENT-ALIST- ELEMENT, then find the appropriate alist | |
| 1939 element for the buffer now current and set up | |
| 1940 CURRENT-ALIST-ELEMENT. Then we set CURRENT-VALUE out | |
| 1941 of that element, and store into CURRENT-BUFFER. | |
| 1942 | |
| 1943 If we are setting the variable and the current buffer does | |
| 1944 not have an alist entry for this variable, an alist entry is | |
| 1945 created. | |
| 1946 | |
| 1947 Note that CURRENT-VALUE can be a forwarding pointer. | |
| 1948 Each time it is examined or set, forwarding must be | |
| 1949 done. */ | |
| 1950 struct symbol_value_buffer_local *bfwd | |
| 1951 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 1952 int some_buffer_local_p = | |
| 1953 (bfwd->magic.type == SYMVAL_SOME_BUFFER_LOCAL); | |
| 1954 /* What value are we caching right now? */ | |
| 1955 Lisp_Object aelt = bfwd->current_alist_element; | |
| 1956 | |
| 1957 if (!NILP (bfwd->current_buffer) && | |
| 1958 current_buffer == XBUFFER (bfwd->current_buffer) | |
| 1959 && ((some_buffer_local_p) | |
| 1960 ? 1 /* doesn't automatically become local */ | |
| 1961 : !NILP (aelt) /* already local */ | |
| 1962 )) | |
| 1963 { | |
| 1964 /* Cache is valid */ | |
| 1965 valcontents = bfwd->current_value; | |
| 1966 } | |
| 1967 else | |
| 1968 { | |
| 1969 /* If the current buffer is not the buffer whose binding is | |
| 1970 currently cached, or if it's a SYMVAL_BUFFER_LOCAL and | |
| 1971 we're looking at the default value, the cache is invalid; we | |
| 1972 need to write it out, and find the new CURRENT-ALIST-ELEMENT | |
| 1973 */ | |
| 1974 | |
| 1975 /* Write out the cached value for the old buffer; copy it | |
| 1976 back to its alist element. This works if the current | |
| 1977 buffer only sees the default value, too. */ | |
| 1978 write_out_buffer_local_cache (symbol, bfwd); | |
| 1979 | |
| 1980 /* Find the new value for CURRENT-ALIST-ELEMENT. */ | |
| 1981 aelt = buffer_local_alist_element (current_buffer, symbol, bfwd); | |
| 1982 if (NILP (aelt)) | |
| 1983 { | |
| 1984 /* This buffer is still seeing the default value. */ | |
| 1985 if (!some_buffer_local_p) | |
| 1986 { | |
| 1987 /* If it's a SYMVAL_BUFFER_LOCAL, give this buffer a | |
| 1988 new assoc for a local value and set | |
| 1989 CURRENT-ALIST-ELEMENT to point to that. */ | |
| 1990 aelt = | |
| 1991 do_symval_forwarding (bfwd->current_value, | |
| 1992 current_buffer, | |
| 1993 XCONSOLE (Vselected_console)); | |
| 1994 aelt = Fcons (symbol, aelt); | |
| 1995 current_buffer->local_var_alist | |
| 1996 = Fcons (aelt, current_buffer->local_var_alist); | |
| 1997 } | |
| 1998 else | |
| 1999 { | |
| 2000 /* If the variable is a SYMVAL_SOME_BUFFER_LOCAL, | |
| 2001 we're currently seeing the default value. */ | |
| 2002 ; | |
| 2003 } | |
| 2004 } | |
| 2005 /* Cache the new buffer's assoc in CURRENT-ALIST-ELEMENT. */ | |
| 2006 bfwd->current_alist_element = aelt; | |
| 2007 /* Set BUFFER, now that CURRENT-ALIST-ELEMENT is accurate. */ | |
| 793 | 2008 bfwd->current_buffer = wrap_buffer (current_buffer); |
| 428 | 2009 valcontents = bfwd->current_value; |
| 2010 } | |
| 2011 break; | |
| 2012 } | |
| 2013 default: | |
| 2500 | 2014 ABORT (); |
| 428 | 2015 } |
| 2016 store_symval_forwarding (symbol, valcontents, newval); | |
| 2017 | |
| 2018 return newval; | |
| 2019 } | |
| 2020 | |
| 2021 | |
| 2022 /* Access or set a buffer-local symbol's default value. */ | |
| 2023 | |
| 2024 /* Return the default value of SYM, but don't check for voidness. | |
| 2025 Return Qunbound if it is void. */ | |
| 2026 | |
| 2027 static Lisp_Object | |
| 2028 default_value (Lisp_Object sym) | |
| 2029 { | |
| 2030 Lisp_Object valcontents; | |
| 2031 | |
| 2032 CHECK_SYMBOL (sym); | |
| 2033 | |
| 2034 retry: | |
| 2035 valcontents = XSYMBOL (sym)->value; | |
| 2036 | |
| 2037 retry_2: | |
| 2038 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2039 return valcontents; | |
| 2040 | |
| 2041 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2042 { | |
| 2043 case SYMVAL_LISP_MAGIC: | |
| 2044 /* #### kludge */ | |
| 2045 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2046 /* semi-change-o */ | |
| 2047 goto retry_2; | |
| 2048 | |
| 2049 case SYMVAL_VARALIAS: | |
| 2050 sym = follow_varalias_pointers (sym, Qt /* #### kludge */); | |
| 2051 /* presto change-o! */ | |
| 2052 goto retry; | |
| 2053 | |
| 2054 case SYMVAL_UNBOUND_MARKER: | |
| 2055 return valcontents; | |
| 2056 | |
| 2057 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 2058 { | |
| 442 | 2059 const struct symbol_value_forward *fwd |
| 428 | 2060 = XSYMBOL_VALUE_FORWARD (valcontents); |
|
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parents:
4940
diff
changeset
|
2061 return (*((Lisp_Object *)((Rawbyte *) XBUFFER (Vbuffer_defaults) |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2062 + ((Rawbyte *)symbol_value_forward_forward (fwd) |
|
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2063 - (Rawbyte *)&buffer_local_flags)))); |
| 428 | 2064 } |
| 2065 | |
| 2066 case SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 2067 { | |
| 442 | 2068 const struct symbol_value_forward *fwd |
| 428 | 2069 = XSYMBOL_VALUE_FORWARD (valcontents); |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2070 return (*((Lisp_Object *)((Rawbyte *) XCONSOLE (Vconsole_defaults) |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2071 + ((Rawbyte *)symbol_value_forward_forward (fwd) |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2072 - (Rawbyte *)&console_local_flags)))); |
| 428 | 2073 } |
| 2074 | |
| 2075 case SYMVAL_BUFFER_LOCAL: | |
| 2076 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 2077 { | |
| 2078 struct symbol_value_buffer_local *bfwd = | |
| 2079 XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 2080 | |
| 2081 /* Handle user-created local variables. */ | |
| 2082 /* If var is set up for a buffer that lacks a local value for it, | |
| 2083 the current value is nominally the default value. | |
| 2084 But the current value slot may be more up to date, since | |
| 2085 ordinary setq stores just that slot. So use that. */ | |
| 2086 if (NILP (bfwd->current_alist_element)) | |
| 2087 return do_symval_forwarding (bfwd->current_value, current_buffer, | |
| 2088 XCONSOLE (Vselected_console)); | |
| 2089 else | |
| 2090 return bfwd->default_value; | |
| 2091 } | |
| 2092 default: | |
| 2093 /* For other variables, get the current value. */ | |
| 2094 return do_symval_forwarding (valcontents, current_buffer, | |
| 2095 XCONSOLE (Vselected_console)); | |
| 2096 } | |
| 2097 | |
| 1204 | 2098 RETURN_NOT_REACHED (Qnil); /* suppress compiler warning */ |
| 428 | 2099 } |
| 2100 | |
| 2101 DEFUN ("default-boundp", Fdefault_boundp, 1, 1, 0, /* | |
| 2102 Return t if SYMBOL has a non-void default value. | |
| 2103 This is the value that is seen in buffers that do not have their own values | |
| 2104 for this variable. | |
| 2105 */ | |
| 2106 (symbol)) | |
| 2107 { | |
| 2108 return UNBOUNDP (default_value (symbol)) ? Qnil : Qt; | |
| 2109 } | |
| 2110 | |
| 2111 DEFUN ("default-value", Fdefault_value, 1, 1, 0, /* | |
| 2112 Return SYMBOL's default value. | |
| 2113 This is the value that is seen in buffers that do not have their own values | |
| 2114 for this variable. The default value is meaningful for variables with | |
| 2115 local bindings in certain buffers. | |
| 2116 */ | |
| 2117 (symbol)) | |
| 2118 { | |
| 2119 Lisp_Object value = default_value (symbol); | |
| 2120 | |
| 2121 return UNBOUNDP (value) ? Fsignal (Qvoid_variable, list1 (symbol)) : value; | |
| 2122 } | |
| 2123 | |
| 2124 DEFUN ("set-default", Fset_default, 2, 2, 0, /* | |
| 444 | 2125 Set SYMBOL's default value to VALUE. SYMBOL and VALUE are evaluated. |
| 428 | 2126 The default value is seen in buffers that do not have their own values |
| 2127 for this variable. | |
| 2128 */ | |
| 2129 (symbol, value)) | |
| 2130 { | |
| 2131 Lisp_Object valcontents; | |
| 2132 | |
| 2133 CHECK_SYMBOL (symbol); | |
| 2134 | |
| 2135 retry: | |
| 2136 valcontents = XSYMBOL (symbol)->value; | |
| 2137 | |
| 2138 retry_2: | |
| 2139 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2140 return Fset (symbol, value); | |
| 2141 | |
| 2142 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2143 { | |
| 2144 case SYMVAL_LISP_MAGIC: | |
| 2145 RETURN_IF_NOT_UNBOUND (maybe_call_magic_handler (symbol, Qset_default, 1, | |
| 2146 value)); | |
| 2147 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2148 /* semi-change-o */ | |
| 2149 goto retry_2; | |
| 2150 | |
| 2151 case SYMVAL_VARALIAS: | |
| 2152 symbol = follow_varalias_pointers (symbol, Qset_default); | |
| 2153 /* presto change-o! */ | |
| 2154 goto retry; | |
| 2155 | |
| 2156 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 2157 set_default_buffer_slot_variable (symbol, value); | |
| 2158 return value; | |
| 2159 | |
| 2160 case SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 2161 set_default_console_slot_variable (symbol, value); | |
| 2162 return value; | |
| 2163 | |
| 2164 case SYMVAL_BUFFER_LOCAL: | |
| 2165 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 2166 { | |
| 2167 /* Store new value into the DEFAULT-VALUE slot */ | |
| 2168 struct symbol_value_buffer_local *bfwd | |
| 2169 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 2170 | |
| 2171 bfwd->default_value = value; | |
| 2172 /* If current-buffer doesn't shadow default_value, | |
| 2173 * we must set the CURRENT-VALUE slot too */ | |
| 2174 if (NILP (bfwd->current_alist_element)) | |
| 2175 store_symval_forwarding (symbol, bfwd->current_value, value); | |
| 2176 return value; | |
| 2177 } | |
| 2178 | |
| 2179 default: | |
| 2180 return Fset (symbol, value); | |
| 2181 } | |
| 2182 } | |
| 2183 | |
| 2184 DEFUN ("setq-default", Fsetq_default, 0, UNEVALLED, 0, /* | |
| 2185 Set the default value of variable SYMBOL to VALUE. | |
| 2186 SYMBOL, the variable name, is literal (not evaluated); | |
| 2187 VALUE is an expression and it is evaluated. | |
| 2188 The default value of a variable is seen in buffers | |
| 2189 that do not have their own values for the variable. | |
| 2190 | |
| 2191 More generally, you can use multiple variables and values, as in | |
| 2192 (setq-default SYMBOL VALUE SYMBOL VALUE...) | |
| 2193 This sets each SYMBOL's default value to the corresponding VALUE. | |
| 2194 The VALUE for the Nth SYMBOL can refer to the new default values | |
| 2195 of previous SYMBOLs. | |
| 2196 */ | |
| 2197 (args)) | |
| 2198 { | |
| 2199 /* This function can GC */ | |
| 2200 int nargs; | |
| 2421 | 2201 Lisp_Object retval = Qnil; |
| 428 | 2202 |
| 2203 GET_LIST_LENGTH (args, nargs); | |
| 2204 | |
| 2205 if (nargs & 1) /* Odd number of arguments? */ | |
| 2206 Fsignal (Qwrong_number_of_arguments, | |
| 2207 list2 (Qsetq_default, make_int (nargs))); | |
| 2208 | |
| 2421 | 2209 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args) |
| 428 | 2210 { |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4642
diff
changeset
|
2211 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 2212 Fset_default (symbol, val); |
| 2421 | 2213 retval = val; |
| 428 | 2214 } |
| 2215 | |
| 2421 | 2216 END_GC_PROPERTY_LIST_LOOP (symbol); |
| 2217 return retval; | |
| 428 | 2218 } |
| 2219 | |
| 2220 /* Lisp functions for creating and removing buffer-local variables. */ | |
| 2221 | |
| 2222 DEFUN ("make-variable-buffer-local", Fmake_variable_buffer_local, 1, 1, | |
| 2223 "vMake Variable Buffer Local: ", /* | |
| 2224 Make VARIABLE have a separate value for each buffer. | |
| 2225 At any time, the value for the current buffer is in effect. | |
| 2226 There is also a default value which is seen in any buffer which has not yet | |
| 2227 set its own value. | |
| 2228 Using `set' or `setq' to set the variable causes it to have a separate value | |
| 2229 for the current buffer if it was previously using the default value. | |
| 2230 The function `default-value' gets the default value and `set-default' | |
| 2231 sets it. | |
| 2232 */ | |
| 2233 (variable)) | |
| 2234 { | |
| 2235 Lisp_Object valcontents; | |
| 2236 | |
| 2237 CHECK_SYMBOL (variable); | |
| 2238 | |
| 2239 retry: | |
| 2240 verify_ok_for_buffer_local (variable, Qmake_variable_buffer_local); | |
| 2241 | |
| 2242 valcontents = XSYMBOL (variable)->value; | |
| 2243 | |
| 2244 retry_2: | |
| 2245 if (SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2246 { | |
| 2247 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2248 { | |
| 2249 case SYMVAL_LISP_MAGIC: | |
| 2250 if (!UNBOUNDP (maybe_call_magic_handler | |
| 2251 (variable, Qmake_variable_buffer_local, 0))) | |
| 2252 return variable; | |
| 2253 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2254 /* semi-change-o */ | |
| 2255 goto retry_2; | |
| 2256 | |
| 2257 case SYMVAL_VARALIAS: | |
| 2258 variable = follow_varalias_pointers (variable, | |
| 2259 Qmake_variable_buffer_local); | |
| 2260 /* presto change-o! */ | |
| 2261 goto retry; | |
| 2262 | |
| 2263 case SYMVAL_FIXNUM_FORWARD: | |
| 2264 case SYMVAL_BOOLEAN_FORWARD: | |
| 2265 case SYMVAL_OBJECT_FORWARD: | |
| 2266 case SYMVAL_UNBOUND_MARKER: | |
| 2267 break; | |
| 2268 | |
| 2269 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 2270 case SYMVAL_BUFFER_LOCAL: | |
| 2271 /* Already per-each-buffer */ | |
| 2272 return variable; | |
| 2273 | |
| 2274 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 2275 /* Transmogrify */ | |
| 2276 XSYMBOL_VALUE_BUFFER_LOCAL (valcontents)->magic.type = | |
| 2277 SYMVAL_BUFFER_LOCAL; | |
| 2278 return variable; | |
| 2279 | |
| 2280 default: | |
| 2500 | 2281 ABORT (); |
| 428 | 2282 } |
| 2283 } | |
| 2284 | |
| 2285 { | |
| 2286 struct symbol_value_buffer_local *bfwd | |
| 3017 | 2287 = ALLOC_LCRECORD_TYPE (struct symbol_value_buffer_local, |
| 428 | 2288 &lrecord_symbol_value_buffer_local); |
| 2289 Lisp_Object foo; | |
| 2290 bfwd->magic.type = SYMVAL_BUFFER_LOCAL; | |
| 2291 | |
| 2292 bfwd->default_value = find_symbol_value (variable); | |
| 2293 bfwd->current_value = valcontents; | |
| 2294 bfwd->current_alist_element = Qnil; | |
| 2295 bfwd->current_buffer = Fcurrent_buffer (); | |
| 793 | 2296 foo = wrap_symbol_value_magic (bfwd); |
| 428 | 2297 *value_slot_past_magic (variable) = foo; |
| 2298 #if 1 /* #### Yuck! FSFmacs bug-compatibility*/ | |
| 2299 /* This sets the default-value of any make-variable-buffer-local to nil. | |
| 2300 That just sucks. User can just use setq-default to effect that, | |
| 2301 but there's no way to do makunbound-default to undo this lossage. */ | |
| 2302 if (UNBOUNDP (valcontents)) | |
| 2303 bfwd->default_value = Qnil; | |
| 2304 #endif | |
| 2305 #if 0 /* #### Yuck! */ | |
| 2306 /* This sets the value to nil in this buffer. | |
| 2307 User could use (setq variable nil) to do this. | |
| 2308 It isn't as egregious to do this automatically | |
| 2309 as it is to do so to the default-value, but it's | |
| 2310 still really dubious. */ | |
| 2311 if (UNBOUNDP (valcontents)) | |
| 2312 Fset (variable, Qnil); | |
| 2313 #endif | |
| 2314 return variable; | |
| 2315 } | |
| 2316 } | |
| 2317 | |
| 2318 DEFUN ("make-local-variable", Fmake_local_variable, 1, 1, | |
| 2319 "vMake Local Variable: ", /* | |
| 2320 Make VARIABLE have a separate value in the current buffer. | |
| 2321 Other buffers will continue to share a common default value. | |
| 2322 \(The buffer-local value of VARIABLE starts out as the same value | |
| 2323 VARIABLE previously had. If VARIABLE was void, it remains void.) | |
| 2324 See also `make-variable-buffer-local'. | |
| 2325 | |
| 2326 If the variable is already arranged to become local when set, | |
| 2327 this function causes a local value to exist for this buffer, | |
| 2328 just as setting the variable would do. | |
| 2329 | |
| 2330 Do not use `make-local-variable' to make a hook variable buffer-local. | |
| 2331 Use `make-local-hook' instead. | |
| 2332 */ | |
| 2333 (variable)) | |
| 2334 { | |
| 2335 Lisp_Object valcontents; | |
| 2336 struct symbol_value_buffer_local *bfwd; | |
| 2337 | |
| 2338 CHECK_SYMBOL (variable); | |
| 2339 | |
| 2340 retry: | |
| 2341 verify_ok_for_buffer_local (variable, Qmake_local_variable); | |
| 2342 | |
| 2343 valcontents = XSYMBOL (variable)->value; | |
| 2344 | |
| 2345 retry_2: | |
| 2346 if (SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2347 { | |
| 2348 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2349 { | |
| 2350 case SYMVAL_LISP_MAGIC: | |
| 2351 if (!UNBOUNDP (maybe_call_magic_handler | |
| 2352 (variable, Qmake_local_variable, 0))) | |
| 2353 return variable; | |
| 2354 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2355 /* semi-change-o */ | |
| 2356 goto retry_2; | |
| 2357 | |
| 2358 case SYMVAL_VARALIAS: | |
| 2359 variable = follow_varalias_pointers (variable, Qmake_local_variable); | |
| 2360 /* presto change-o! */ | |
| 2361 goto retry; | |
| 2362 | |
| 2363 case SYMVAL_FIXNUM_FORWARD: | |
| 2364 case SYMVAL_BOOLEAN_FORWARD: | |
| 2365 case SYMVAL_OBJECT_FORWARD: | |
| 2366 case SYMVAL_UNBOUND_MARKER: | |
| 2367 break; | |
| 2368 | |
| 2369 case SYMVAL_BUFFER_LOCAL: | |
| 2370 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 2371 { | |
| 2372 /* Make sure the symbol has a local value in this particular | |
| 2373 buffer, by setting it to the same value it already has. */ | |
| 2374 Fset (variable, find_symbol_value (variable)); | |
| 2375 return variable; | |
| 2376 } | |
| 2377 | |
| 2378 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 2379 { | |
| 2380 if (!NILP (buffer_local_alist_element (current_buffer, | |
| 2381 variable, | |
| 2382 (XSYMBOL_VALUE_BUFFER_LOCAL | |
| 2383 (valcontents))))) | |
| 2384 goto already_local_to_current_buffer; | |
| 2385 else | |
| 2386 goto already_local_to_some_other_buffer; | |
| 2387 } | |
| 2388 | |
| 2389 default: | |
| 2500 | 2390 ABORT (); |
| 428 | 2391 } |
| 2392 } | |
| 2393 | |
| 2394 /* Make sure variable is set up to hold per-buffer values */ | |
| 3017 | 2395 bfwd = ALLOC_LCRECORD_TYPE (struct symbol_value_buffer_local, |
| 428 | 2396 &lrecord_symbol_value_buffer_local); |
| 2397 bfwd->magic.type = SYMVAL_SOME_BUFFER_LOCAL; | |
| 2398 | |
| 2399 bfwd->current_buffer = Qnil; | |
| 2400 bfwd->current_alist_element = Qnil; | |
| 2401 bfwd->current_value = valcontents; | |
| 2402 /* passing 0 is OK because this should never be a | |
| 2403 SYMVAL_CURRENT_BUFFER_FORWARD or SYMVAL_SELECTED_CONSOLE_FORWARD | |
| 2404 variable. */ | |
| 2405 bfwd->default_value = do_symval_forwarding (valcontents, 0, 0); | |
| 2406 | |
| 2407 #if 0 | |
| 2408 if (UNBOUNDP (bfwd->default_value)) | |
| 2409 bfwd->default_value = Qnil; /* Yuck! */ | |
| 2410 #endif | |
| 2411 | |
| 793 | 2412 valcontents = wrap_symbol_value_magic (bfwd); |
| 428 | 2413 *value_slot_past_magic (variable) = valcontents; |
| 2414 | |
| 2415 already_local_to_some_other_buffer: | |
| 2416 | |
| 2417 /* Make sure this buffer has its own value of variable */ | |
| 2418 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 2419 | |
| 2420 if (UNBOUNDP (bfwd->default_value)) | |
| 2421 { | |
| 2422 /* If default value is unbound, set local value to nil. */ | |
| 793 | 2423 bfwd->current_buffer = wrap_buffer (current_buffer); |
| 428 | 2424 bfwd->current_alist_element = Fcons (variable, Qnil); |
| 2425 current_buffer->local_var_alist = | |
| 2426 Fcons (bfwd->current_alist_element, current_buffer->local_var_alist); | |
| 2427 store_symval_forwarding (variable, bfwd->current_value, Qnil); | |
| 2428 return variable; | |
| 2429 } | |
| 2430 | |
| 2431 current_buffer->local_var_alist | |
| 2432 = Fcons (Fcons (variable, bfwd->default_value), | |
| 2433 current_buffer->local_var_alist); | |
| 2434 | |
| 2435 /* Make sure symbol does not think it is set up for this buffer; | |
| 2436 force it to look once again for this buffer's value */ | |
| 2437 if (!NILP (bfwd->current_buffer) && | |
| 2438 current_buffer == XBUFFER (bfwd->current_buffer)) | |
| 2439 bfwd->current_buffer = Qnil; | |
| 2440 | |
| 2441 already_local_to_current_buffer: | |
| 2442 | |
| 2443 /* If the symbol forwards into a C variable, then swap in the | |
| 2444 variable for this buffer immediately. If C code modifies the | |
| 2445 variable before we swap in, then that new value will clobber the | |
| 2446 default value the next time we swap. */ | |
| 2447 bfwd = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 2448 if (SYMBOL_VALUE_MAGIC_P (bfwd->current_value)) | |
| 2449 { | |
| 2450 switch (XSYMBOL_VALUE_MAGIC_TYPE (bfwd->current_value)) | |
| 2451 { | |
| 2452 case SYMVAL_FIXNUM_FORWARD: | |
| 2453 case SYMVAL_BOOLEAN_FORWARD: | |
| 2454 case SYMVAL_OBJECT_FORWARD: | |
| 2455 case SYMVAL_DEFAULT_BUFFER_FORWARD: | |
| 2456 set_up_buffer_local_cache (variable, bfwd, current_buffer, Qnil, 1); | |
| 2457 break; | |
| 2458 | |
| 2459 case SYMVAL_UNBOUND_MARKER: | |
| 2460 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 2461 break; | |
| 2462 | |
| 2463 default: | |
| 2500 | 2464 ABORT (); |
| 428 | 2465 } |
| 2466 } | |
| 2467 | |
| 2468 return variable; | |
| 2469 } | |
| 2470 | |
| 2471 DEFUN ("kill-local-variable", Fkill_local_variable, 1, 1, | |
| 2472 "vKill Local Variable: ", /* | |
| 2473 Make VARIABLE no longer have a separate value in the current buffer. | |
| 2474 From now on the default value will apply in this buffer. | |
| 2475 */ | |
| 2476 (variable)) | |
| 2477 { | |
| 2478 Lisp_Object valcontents; | |
| 2479 | |
| 2480 CHECK_SYMBOL (variable); | |
| 2481 | |
| 2482 retry: | |
| 2483 valcontents = XSYMBOL (variable)->value; | |
| 2484 | |
| 2485 retry_2: | |
| 2486 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2487 return variable; | |
| 2488 | |
| 2489 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2490 { | |
| 2491 case SYMVAL_LISP_MAGIC: | |
| 2492 if (!UNBOUNDP (maybe_call_magic_handler | |
| 2493 (variable, Qkill_local_variable, 0))) | |
| 2494 return variable; | |
| 2495 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2496 /* semi-change-o */ | |
| 2497 goto retry_2; | |
| 2498 | |
| 2499 case SYMVAL_VARALIAS: | |
| 2500 variable = follow_varalias_pointers (variable, Qkill_local_variable); | |
| 2501 /* presto change-o! */ | |
| 2502 goto retry; | |
| 2503 | |
| 2504 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 2505 { | |
| 442 | 2506 const struct symbol_value_forward *fwd |
| 428 | 2507 = XSYMBOL_VALUE_FORWARD (valcontents); |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4940
diff
changeset
|
2508 int offset = ((Rawbyte *) symbol_value_forward_forward (fwd) |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2509 - (Rawbyte *) &buffer_local_flags); |
| 428 | 2510 int mask = |
| 2511 XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd))); | |
| 2512 | |
| 2513 if (mask > 0) | |
| 2514 { | |
| 2515 int (*magicfun) (Lisp_Object sym, Lisp_Object *val, | |
| 2516 Lisp_Object in_object, int flags) = | |
| 2517 symbol_value_forward_magicfun (fwd); | |
| 2518 Lisp_Object oldval = * (Lisp_Object *) | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4940
diff
changeset
|
2519 (offset + (Rawbyte *) XBUFFER (Vbuffer_defaults)); |
| 428 | 2520 if (magicfun) |
| 771 | 2521 (magicfun) (variable, &oldval, wrap_buffer (current_buffer), 0); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2522 *(Lisp_Object *) (offset + (Rawbyte *) current_buffer) |
| 428 | 2523 = oldval; |
| 2524 current_buffer->local_var_flags &= ~mask; | |
| 2525 } | |
| 2526 return variable; | |
| 2527 } | |
| 2528 | |
| 2529 case SYMVAL_BUFFER_LOCAL: | |
| 2530 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 2531 { | |
| 2532 /* Get rid of this buffer's alist element, if any */ | |
| 2533 struct symbol_value_buffer_local *bfwd | |
| 2534 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 2535 Lisp_Object alist = current_buffer->local_var_alist; | |
| 2536 Lisp_Object alist_element | |
| 2537 = buffer_local_alist_element (current_buffer, variable, bfwd); | |
| 2538 | |
| 2539 if (!NILP (alist_element)) | |
| 2540 current_buffer->local_var_alist = Fdelq (alist_element, alist); | |
| 2541 | |
| 2542 /* Make sure symbol does not think it is set up for this buffer; | |
| 2543 force it to look once again for this buffer's value */ | |
| 2544 if (!NILP (bfwd->current_buffer) && | |
| 2545 current_buffer == XBUFFER (bfwd->current_buffer)) | |
| 2546 bfwd->current_buffer = Qnil; | |
| 2547 | |
| 2548 /* We just changed the value in the current_buffer. If this | |
| 2549 variable forwards to a C variable, we need to change the | |
| 2550 value of the C variable. set_up_buffer_local_cache() | |
| 2551 will do this. It doesn't hurt to do it always, | |
| 2552 so just go ahead and do that. */ | |
| 2553 set_up_buffer_local_cache (variable, bfwd, current_buffer, Qnil, 1); | |
| 2554 } | |
| 2555 return variable; | |
| 2556 | |
| 2557 default: | |
| 2558 return variable; | |
| 2559 } | |
| 1204 | 2560 RETURN_NOT_REACHED(Qnil); /* suppress compiler warning */ |
| 428 | 2561 } |
| 2562 | |
| 2563 | |
| 2564 DEFUN ("kill-console-local-variable", Fkill_console_local_variable, 1, 1, | |
| 2565 "vKill Console Local Variable: ", /* | |
| 2566 Make VARIABLE no longer have a separate value in the selected console. | |
| 2567 From now on the default value will apply in this console. | |
| 2568 */ | |
| 2569 (variable)) | |
| 2570 { | |
| 2571 Lisp_Object valcontents; | |
| 2572 | |
| 2573 CHECK_SYMBOL (variable); | |
| 2574 | |
| 2575 retry: | |
| 2576 valcontents = XSYMBOL (variable)->value; | |
| 2577 | |
| 2578 retry_2: | |
| 2579 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2580 return variable; | |
| 2581 | |
| 2582 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2583 { | |
| 2584 case SYMVAL_LISP_MAGIC: | |
| 2585 if (!UNBOUNDP (maybe_call_magic_handler | |
| 2586 (variable, Qkill_console_local_variable, 0))) | |
| 2587 return variable; | |
| 2588 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2589 /* semi-change-o */ | |
| 2590 goto retry_2; | |
| 2591 | |
| 2592 case SYMVAL_VARALIAS: | |
| 2593 variable = follow_varalias_pointers (variable, | |
| 2594 Qkill_console_local_variable); | |
| 2595 /* presto change-o! */ | |
| 2596 goto retry; | |
| 2597 | |
| 2598 case SYMVAL_SELECTED_CONSOLE_FORWARD: | |
| 2599 { | |
| 442 | 2600 const struct symbol_value_forward *fwd |
| 428 | 2601 = XSYMBOL_VALUE_FORWARD (valcontents); |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2602 int offset = ((Rawbyte *) symbol_value_forward_forward (fwd) |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2603 - (Rawbyte *) &console_local_flags); |
| 428 | 2604 int mask = |
| 2605 XINT (*((Lisp_Object *) symbol_value_forward_forward (fwd))); | |
| 2606 | |
| 2607 if (mask > 0) | |
| 2608 { | |
| 2609 int (*magicfun) (Lisp_Object sym, Lisp_Object *val, | |
| 2610 Lisp_Object in_object, int flags) = | |
| 2611 symbol_value_forward_magicfun (fwd); | |
| 2612 Lisp_Object oldval = * (Lisp_Object *) | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2613 (offset + (Rawbyte *) XCONSOLE (Vconsole_defaults)); |
| 428 | 2614 if (magicfun) |
| 2615 magicfun (variable, &oldval, Vselected_console, 0); | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
2616 *(Lisp_Object *) (offset + (Rawbyte *) XCONSOLE (Vselected_console)) |
| 428 | 2617 = oldval; |
| 2618 XCONSOLE (Vselected_console)->local_var_flags &= ~mask; | |
| 2619 } | |
| 2620 return variable; | |
| 2621 } | |
| 2622 | |
| 2623 default: | |
| 2624 return variable; | |
| 2625 } | |
| 2626 } | |
| 2627 | |
| 2628 /* Used by specbind to determine what effects it might have. Returns: | |
| 2629 * 0 if symbol isn't buffer-local, and wouldn't be after it is set | |
| 2630 * <0 if symbol isn't presently buffer-local, but set would make it so | |
| 2631 * >0 if symbol is presently buffer-local | |
| 2632 */ | |
| 2633 int | |
| 2634 symbol_value_buffer_local_info (Lisp_Object symbol, struct buffer *buffer) | |
| 2635 { | |
| 2636 Lisp_Object valcontents; | |
| 2637 | |
| 2638 retry: | |
| 2639 valcontents = XSYMBOL (symbol)->value; | |
| 2640 | |
| 2641 retry_2: | |
| 2642 if (SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2643 { | |
| 2644 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2645 { | |
| 2646 case SYMVAL_LISP_MAGIC: | |
| 2647 /* #### kludge */ | |
| 2648 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2649 /* semi-change-o */ | |
| 2650 goto retry_2; | |
| 2651 | |
| 2652 case SYMVAL_VARALIAS: | |
| 2653 symbol = follow_varalias_pointers (symbol, Qt /* #### kludge */); | |
| 2654 /* presto change-o! */ | |
| 2655 goto retry; | |
| 2656 | |
| 2657 case SYMVAL_CURRENT_BUFFER_FORWARD: | |
| 2658 { | |
| 442 | 2659 const struct symbol_value_forward *fwd |
| 428 | 2660 = XSYMBOL_VALUE_FORWARD (valcontents); |
| 2661 int mask = XINT (*((Lisp_Object *) | |
| 2662 symbol_value_forward_forward (fwd))); | |
| 2663 if ((mask <= 0) || (buffer && (buffer->local_var_flags & mask))) | |
| 2664 /* Already buffer-local */ | |
| 2665 return 1; | |
| 2666 else | |
| 2667 /* Would be buffer-local after set */ | |
| 2668 return -1; | |
| 2669 } | |
| 2670 case SYMVAL_BUFFER_LOCAL: | |
| 2671 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 2672 { | |
| 2673 struct symbol_value_buffer_local *bfwd | |
| 2674 = XSYMBOL_VALUE_BUFFER_LOCAL (valcontents); | |
| 2675 if (buffer | |
| 2676 && !NILP (buffer_local_alist_element (buffer, symbol, bfwd))) | |
| 2677 return 1; | |
| 2678 else | |
| 2679 /* Automatically becomes local when set */ | |
| 2680 return bfwd->magic.type == SYMVAL_BUFFER_LOCAL ? -1 : 0; | |
| 2681 } | |
| 2682 default: | |
| 2683 return 0; | |
| 2684 } | |
| 2685 } | |
| 2686 return 0; | |
| 2687 } | |
| 2688 | |
| 2689 | |
| 2690 DEFUN ("symbol-value-in-buffer", Fsymbol_value_in_buffer, 2, 3, 0, /* | |
| 2691 Return the value of SYMBOL in BUFFER, or UNBOUND-VALUE if it is unbound. | |
| 2692 */ | |
| 2693 (symbol, buffer, unbound_value)) | |
| 2694 { | |
| 2695 Lisp_Object value; | |
| 2696 CHECK_SYMBOL (symbol); | |
| 2697 CHECK_BUFFER (buffer); | |
| 2698 value = symbol_value_in_buffer (symbol, buffer); | |
| 2699 return UNBOUNDP (value) ? unbound_value : value; | |
| 2700 } | |
| 2701 | |
| 2702 DEFUN ("symbol-value-in-console", Fsymbol_value_in_console, 2, 3, 0, /* | |
| 2703 Return the value of SYMBOL in CONSOLE, or UNBOUND-VALUE if it is unbound. | |
| 2704 */ | |
| 2705 (symbol, console, unbound_value)) | |
| 2706 { | |
| 2707 Lisp_Object value; | |
| 2708 CHECK_SYMBOL (symbol); | |
| 2709 CHECK_CONSOLE (console); | |
| 2710 value = symbol_value_in_console (symbol, console); | |
| 2711 return UNBOUNDP (value) ? unbound_value : value; | |
| 2712 } | |
| 2713 | |
| 2714 DEFUN ("built-in-variable-type", Fbuilt_in_variable_type, 1, 1, 0, /* | |
| 2715 If SYMBOL is a built-in variable, return info about this; else return nil. | |
| 2716 The returned info will be a symbol, one of | |
| 2717 | |
| 2718 `object' A simple built-in variable. | |
| 2719 `const-object' Same, but cannot be set. | |
| 2720 `integer' A built-in integer variable. | |
| 2721 `const-integer' Same, but cannot be set. | |
| 2722 `boolean' A built-in boolean variable. | |
| 2723 `const-boolean' Same, but cannot be set. | |
| 2724 `const-specifier' Always contains a specifier; e.g. `has-modeline-p'. | |
| 2725 `current-buffer' A built-in buffer-local variable. | |
| 2726 `const-current-buffer' Same, but cannot be set. | |
| 2727 `default-buffer' Forwards to the default value of a built-in | |
| 2728 buffer-local variable. | |
| 2729 `selected-console' A built-in console-local variable. | |
| 2730 `const-selected-console' Same, but cannot be set. | |
| 2731 `default-console' Forwards to the default value of a built-in | |
| 2732 console-local variable. | |
| 2733 */ | |
| 2734 (symbol)) | |
| 2735 { | |
| 2736 REGISTER Lisp_Object valcontents; | |
| 2737 | |
| 2738 CHECK_SYMBOL (symbol); | |
| 2739 | |
| 2740 retry: | |
| 2741 valcontents = XSYMBOL (symbol)->value; | |
| 2742 | |
| 2743 retry_2: | |
| 2744 if (!SYMBOL_VALUE_MAGIC_P (valcontents)) | |
| 2745 return Qnil; | |
| 2746 | |
| 2747 switch (XSYMBOL_VALUE_MAGIC_TYPE (valcontents)) | |
| 2748 { | |
| 2749 case SYMVAL_LISP_MAGIC: | |
| 2750 valcontents = XSYMBOL_VALUE_LISP_MAGIC (valcontents)->shadowed; | |
| 2751 /* semi-change-o */ | |
| 2752 goto retry_2; | |
| 2753 | |
| 2754 case SYMVAL_VARALIAS: | |
| 2755 symbol = follow_varalias_pointers (symbol, Qt); | |
| 2756 /* presto change-o! */ | |
| 2757 goto retry; | |
| 2758 | |
| 2759 case SYMVAL_BUFFER_LOCAL: | |
| 2760 case SYMVAL_SOME_BUFFER_LOCAL: | |
| 2761 valcontents = | |
| 2762 XSYMBOL_VALUE_BUFFER_LOCAL (valcontents)->current_value; | |
| 2763 /* semi-change-o */ | |
| 2764 goto retry_2; | |
| 2765 | |
| 2766 case SYMVAL_FIXNUM_FORWARD: return Qinteger; | |
| 2767 case SYMVAL_CONST_FIXNUM_FORWARD: return Qconst_integer; | |
| 2768 case SYMVAL_BOOLEAN_FORWARD: return Qboolean; | |
| 2769 case SYMVAL_CONST_BOOLEAN_FORWARD: return Qconst_boolean; | |
| 2770 case SYMVAL_OBJECT_FORWARD: return Qobject; | |
| 2771 case SYMVAL_CONST_OBJECT_FORWARD: return Qconst_object; | |
| 2772 case SYMVAL_CONST_SPECIFIER_FORWARD: return Qconst_specifier; | |
| 2773 case SYMVAL_DEFAULT_BUFFER_FORWARD: return Qdefault_buffer; | |
| 2774 case SYMVAL_CURRENT_BUFFER_FORWARD: return Qcurrent_buffer; | |
| 2775 case SYMVAL_CONST_CURRENT_BUFFER_FORWARD: return Qconst_current_buffer; | |
| 2776 case SYMVAL_DEFAULT_CONSOLE_FORWARD: return Qdefault_console; | |
| 2777 case SYMVAL_SELECTED_CONSOLE_FORWARD: return Qselected_console; | |
| 2778 case SYMVAL_CONST_SELECTED_CONSOLE_FORWARD: return Qconst_selected_console; | |
| 2779 case SYMVAL_UNBOUND_MARKER: return Qnil; | |
| 2780 | |
| 2781 default: | |
| 2500 | 2782 ABORT (); return Qnil; |
| 428 | 2783 } |
| 2784 } | |
| 2785 | |
| 2786 | |
| 2787 DEFUN ("local-variable-p", Flocal_variable_p, 2, 3, 0, /* | |
| 2788 Return t if SYMBOL's value is local to BUFFER. | |
| 444 | 2789 If optional third arg AFTER-SET is non-nil, return t if SYMBOL would be |
| 428 | 2790 buffer-local after it is set, regardless of whether it is so presently. |
| 2791 A nil value for BUFFER is *not* the same as (current-buffer), but means | |
| 2792 "no buffer". Specifically: | |
| 2793 | |
| 2794 -- If BUFFER is nil and AFTER-SET is nil, a return value of t indicates that | |
| 2795 the variable is one of the special built-in variables that is always | |
| 2796 buffer-local. (This includes `buffer-file-name', `buffer-read-only', | |
| 2797 `buffer-undo-list', and others.) | |
| 2798 | |
| 2799 -- If BUFFER is nil and AFTER-SET is t, a return value of t indicates that | |
| 2800 the variable has had `make-variable-buffer-local' applied to it. | |
| 2801 */ | |
| 2802 (symbol, buffer, after_set)) | |
| 2803 { | |
| 2804 int local_info; | |
| 2805 | |
| 2806 CHECK_SYMBOL (symbol); | |
| 2807 if (!NILP (buffer)) | |
| 2808 { | |
| 2809 buffer = get_buffer (buffer, 1); | |
| 2810 local_info = symbol_value_buffer_local_info (symbol, XBUFFER (buffer)); | |
| 2811 } | |
| 2812 else | |
| 2813 { | |
| 2814 local_info = symbol_value_buffer_local_info (symbol, 0); | |
| 2815 } | |
| 2816 | |
| 2817 if (NILP (after_set)) | |
| 2818 return local_info > 0 ? Qt : Qnil; | |
| 2819 else | |
| 2820 return local_info != 0 ? Qt : Qnil; | |
| 2821 } | |
|
4502
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2822 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
2823 DEFUN ("custom-variable-p", Fcustom_variable_p, 1, 1, 0, /* |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2824 Return non-nil if SYMBOL names a custom variable. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2825 Does not follow the variable alias chain. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2826 */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2827 (symbol)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2828 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2829 return (!(NILP (Fget(symbol, intern ("standard-value"), Qnil))) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2830 || !(NILP (Fget(symbol, intern ("custom-autoload"), Qnil)))) ? |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2831 Qt: Qnil; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2832 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2833 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2834 static Lisp_Object |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2835 user_variable_alias_check_fun (Lisp_Object symbol) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2836 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2837 Lisp_Object documentation = Fget (symbol, Qvariable_documentation, Qnil); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2838 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2839 if ((INTP (documentation) && XINT (documentation) < 0) || |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2840 (STRINGP (documentation) && |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2841 (string_byte (documentation, 0) == '*')) || |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2842 /* If (STRING . INTEGER), a negative integer means a user variable. */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2843 (CONSP (documentation) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
2844 && STRINGP (XCAR (documentation)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2845 && INTP (XCDR (documentation)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2846 && XINT (XCDR (documentation)) < 0) || |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2847 !NILP (Fcustom_variable_p (symbol))) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2848 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2849 return make_int(1); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2850 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2851 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2852 return Qzero; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2853 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2854 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2855 DEFUN ("user-variable-p", Fuser_variable_p, 1, 1, 0, /* |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2856 Return t if SYMBOL names a variable intended to be set and modified by users. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2857 \(The alternative is a variable used internally in a Lisp program.) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2858 A symbol names a user variable if |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2859 \(1) the first character of its documentation is `*', or |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2860 \(2) it is customizable (`custom-variable-p' gives t), or |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2861 \(3) it names a variable alias that eventually resolves to another user variable. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2862 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2863 The GNU Emacs implementation of `user-variable-p' returns nil if there is a |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2864 loop in the chain of symbols. Since this is indistinguishable from the case |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2865 where a symbol names a non-user variable, XEmacs signals a |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2866 `cyclic-variable-indirection' error instead; use `condition-case' to catch |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2867 this error if you really want to avoid this. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2868 */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2869 (symbol)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2870 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2871 Lisp_Object mapped; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2872 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2873 if (!SYMBOLP (symbol)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2874 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2875 return Qnil; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2876 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2877 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2878 /* Called for its side-effects, we want it to signal if there's a loop. */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2879 follow_varalias_pointers (symbol, Qt); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2880 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2881 /* Look through the various aliases. */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2882 mapped = map_varalias_chain (symbol, Qt, user_variable_alias_check_fun); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2883 if (EQ (Qzero, mapped)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2884 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2885 return Qnil; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2886 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2887 |
|
4503
af95657e0bfd
Use EQ() and !EQ() in symbols.c, thank you Robert Delius Royar.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4502
diff
changeset
|
2888 assert (EQ (make_int (1), mapped)); |
|
4502
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2889 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2890 return Qt; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2891 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2892 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
2893 |
| 428 | 2894 |
| 2895 | |
| 2896 /* | |
| 2897 I've gone ahead and partially implemented this because it's | |
| 2898 super-useful for dealing with the compatibility problems in supporting | |
| 2899 the old pointer-shape variables, and preventing people from `setq'ing | |
| 2900 the new variables. Any other way of handling this problem is way | |
| 2901 ugly, likely to be slow, and generally not something I want to waste | |
| 2902 my time worrying about. | |
| 2903 | |
| 2904 The interface and/or function name is sure to change before this | |
| 2905 gets into its final form. I currently like the way everything is | |
| 2906 set up and it has all the features I want it to have, except for | |
| 2907 one: I really want to be able to have multiple nested handlers, | |
| 2908 to implement an `advice'-like capability. This would allow, | |
| 2909 for example, a clean way of implementing `debug-if-set' or | |
| 2910 `debug-if-referenced' and such. | |
| 2911 | |
| 2912 NOTE NOTE NOTE NOTE NOTE NOTE NOTE: | |
| 2913 ************************************************************ | |
| 2914 **Only** the `set-value', `make-unbound', and `make-local' | |
| 2915 handler types are currently implemented. Implementing the | |
| 2916 get-value and bound-predicate handlers is somewhat tricky | |
| 2917 because there are lots of subfunctions (e.g. find_symbol_value()). | |
| 2918 find_symbol_value(), in fact, is called from outside of | |
| 2919 this module. You'd have to have it do this: | |
| 2920 | |
| 2921 -- check for a `bound-predicate' handler, call that if so; | |
| 2922 if it returns nil, return Qunbound | |
| 2923 -- check for a `get-value' handler and call it and return | |
| 2924 that value | |
| 2925 | |
| 2926 It gets even trickier when you have to deal with | |
| 2927 sub-subfunctions like find_symbol_value_1(), and esp. | |
| 2928 when you have to properly handle variable aliases, which | |
| 2929 can lead to lots of tricky situations. So I've just | |
| 2930 punted on this, since the interface isn't officially | |
| 2931 exported and we can get by with just a `set-value' | |
| 2932 handler. | |
| 2933 | |
| 2934 Actions in unimplemented handler types will correctly | |
| 2935 ignore any handlers, and will not fuck anything up or | |
| 2936 go awry. | |
| 2937 | |
| 2938 WARNING WARNING: If you do go and implement another | |
| 2939 type of handler, make *sure* to change | |
| 2940 would_be_magic_handled() so it knows about this, | |
| 2941 or dire things could result. | |
| 2942 ************************************************************ | |
| 2943 NOTE NOTE NOTE NOTE NOTE NOTE NOTE | |
| 2944 | |
| 2945 Real documentation is as follows. | |
| 2946 | |
| 2947 Set a magic handler for VARIABLE. | |
| 2948 This allows you to specify arbitrary behavior that results from | |
| 2949 accessing or setting a variable. For example, retrieving the | |
| 2950 variable's value might actually retrieve the first element off of | |
| 2951 a list stored in another variable, and setting the variable's value | |
| 2952 might add an element to the front of that list. (This is how the | |
| 2953 obsolete variable `unread-command-event' is implemented.) | |
| 2954 | |
| 2955 In general it is NOT good programming practice to use magic variables | |
| 2956 in a new package that you are designing. If you feel the need to | |
| 2957 do this, it's almost certainly a sign that you should be using a | |
| 2958 function instead of a variable. This facility is provided to allow | |
| 2959 a package to support obsolete variables and provide compatibility | |
| 2960 with similar packages with different variable names and semantics. | |
| 2961 By using magic handlers, you can cleanly provide obsoleteness and | |
| 2962 compatibility support and separate this support from the core | |
| 2963 routines in a package. | |
| 2964 | |
| 2965 VARIABLE should be a symbol naming the variable for which the | |
| 2966 magic behavior is provided. HANDLER-TYPE is a symbol specifying | |
| 2967 which behavior is being controlled, and HANDLER is the function | |
| 2968 that will be called to control this behavior. HARG is a | |
| 2969 value that will be passed to HANDLER but is otherwise | |
| 2970 uninterpreted. KEEP-EXISTING specifies what to do with existing | |
| 2971 handlers of the same type; nil means "erase them all", t means | |
| 2972 "keep them but insert at the beginning", the list (t) means | |
| 2973 "keep them but insert at the end", a function means "keep | |
| 2974 them but insert before the specified function", a list containing | |
| 2975 a function means "keep them but insert after the specified | |
| 2976 function". | |
| 2977 | |
| 2978 You can specify magic behavior for any type of variable at all, | |
| 2979 and for any handler types that are unspecified, the standard | |
| 2980 behavior applies. This allows you, for example, to use | |
| 2981 `defvaralias' in conjunction with this function. (For that | |
| 2982 matter, `defvaralias' could be implemented using this function.) | |
| 2983 | |
| 2984 The behaviors that can be specified in HANDLER-TYPE are | |
| 2985 | |
| 2986 get-value (SYM ARGS FUN HARG HANDLERS) | |
| 2987 This means that one of the functions `symbol-value', | |
| 2988 `default-value', `symbol-value-in-buffer', or | |
| 2989 `symbol-value-in-console' was called on SYM. | |
| 2990 | |
| 2991 set-value (SYM ARGS FUN HARG HANDLERS) | |
| 2992 This means that one of the functions `set' or `set-default' | |
| 2993 was called on SYM. | |
| 2994 | |
| 2995 bound-predicate (SYM ARGS FUN HARG HANDLERS) | |
| 2996 This means that one of the functions `boundp', `globally-boundp', | |
| 2997 or `default-boundp' was called on SYM. | |
| 2998 | |
| 2999 make-unbound (SYM ARGS FUN HARG HANDLERS) | |
| 3000 This means that the function `makunbound' was called on SYM. | |
| 3001 | |
| 3002 local-predicate (SYM ARGS FUN HARG HANDLERS) | |
| 3003 This means that the function `local-variable-p' was called | |
| 3004 on SYM. | |
| 3005 | |
| 3006 make-local (SYM ARGS FUN HARG HANDLERS) | |
| 3007 This means that one of the functions `make-local-variable', | |
| 3008 `make-variable-buffer-local', `kill-local-variable', | |
| 3009 or `kill-console-local-variable' was called on SYM. | |
| 3010 | |
| 3011 The meanings of the arguments are as follows: | |
| 3012 | |
| 3013 SYM is the symbol on which the function was called, and is always | |
| 3014 the first argument to the function. | |
| 3015 | |
| 3016 ARGS are the remaining arguments in the original call (i.e. all | |
| 3017 but the first). In the case of `set-value' in particular, | |
| 3018 the first element of ARGS is the value to which the variable | |
| 3019 is being set. In some cases, ARGS is sanitized from what was | |
| 3020 actually given. For example, whenever `nil' is passed to an | |
| 3021 argument and it means `current-buffer', the current buffer is | |
| 3022 substituted instead. | |
| 3023 | |
| 3024 FUN is a symbol indicating which function is being called. | |
| 3025 For many of the functions, you can determine the corresponding | |
| 3026 function of a different class using | |
| 3027 `symbol-function-corresponding-function'. | |
| 3028 | |
| 3029 HARG is the argument that was given in the call | |
| 3030 to `set-symbol-value-handler' for SYM and HANDLER-TYPE. | |
| 3031 | |
| 3032 HANDLERS is a structure containing the remaining handlers | |
| 3033 for the variable; to call one of them, use | |
| 3034 `chain-to-symbol-value-handler'. | |
| 3035 | |
| 3036 NOTE: You may *not* modify the list in ARGS, and if you want to | |
| 3037 keep it around after the handler function exits, you must make | |
| 3038 a copy using `copy-sequence'. (Same caveats for HANDLERS also.) | |
| 3039 */ | |
| 3040 | |
| 3041 static enum lisp_magic_handler | |
| 3042 decode_magic_handler_type (Lisp_Object symbol) | |
| 3043 { | |
| 3044 if (EQ (symbol, Qget_value)) return MAGIC_HANDLER_GET_VALUE; | |
| 3045 if (EQ (symbol, Qset_value)) return MAGIC_HANDLER_SET_VALUE; | |
| 3046 if (EQ (symbol, Qbound_predicate)) return MAGIC_HANDLER_BOUND_PREDICATE; | |
| 3047 if (EQ (symbol, Qmake_unbound)) return MAGIC_HANDLER_MAKE_UNBOUND; | |
| 3048 if (EQ (symbol, Qlocal_predicate)) return MAGIC_HANDLER_LOCAL_PREDICATE; | |
| 3049 if (EQ (symbol, Qmake_local)) return MAGIC_HANDLER_MAKE_LOCAL; | |
| 3050 | |
| 563 | 3051 invalid_constant ("Unrecognized symbol value handler type", symbol); |
| 1204 | 3052 RETURN_NOT_REACHED (MAGIC_HANDLER_MAX); |
| 428 | 3053 } |
| 3054 | |
| 3055 static enum lisp_magic_handler | |
| 3056 handler_type_from_function_symbol (Lisp_Object funsym, int abort_if_not_found) | |
| 3057 { | |
| 3058 if (EQ (funsym, Qsymbol_value) | |
| 3059 || EQ (funsym, Qdefault_value) | |
| 3060 || EQ (funsym, Qsymbol_value_in_buffer) | |
| 3061 || EQ (funsym, Qsymbol_value_in_console)) | |
| 3062 return MAGIC_HANDLER_GET_VALUE; | |
| 3063 | |
| 3064 if (EQ (funsym, Qset) | |
| 3065 || EQ (funsym, Qset_default)) | |
| 3066 return MAGIC_HANDLER_SET_VALUE; | |
| 3067 | |
| 3068 if (EQ (funsym, Qboundp) | |
| 3069 || EQ (funsym, Qglobally_boundp) | |
| 3070 || EQ (funsym, Qdefault_boundp)) | |
| 3071 return MAGIC_HANDLER_BOUND_PREDICATE; | |
| 3072 | |
| 3073 if (EQ (funsym, Qmakunbound)) | |
| 3074 return MAGIC_HANDLER_MAKE_UNBOUND; | |
| 3075 | |
| 3076 if (EQ (funsym, Qlocal_variable_p)) | |
| 3077 return MAGIC_HANDLER_LOCAL_PREDICATE; | |
| 3078 | |
| 3079 if (EQ (funsym, Qmake_variable_buffer_local) | |
| 3080 || EQ (funsym, Qmake_local_variable)) | |
| 3081 return MAGIC_HANDLER_MAKE_LOCAL; | |
| 3082 | |
| 3083 if (abort_if_not_found) | |
| 2500 | 3084 ABORT (); |
| 563 | 3085 invalid_argument ("Unrecognized symbol-value function", funsym); |
| 1204 | 3086 RETURN_NOT_REACHED (MAGIC_HANDLER_MAX); |
| 428 | 3087 } |
| 3088 | |
| 3089 static int | |
| 3090 would_be_magic_handled (Lisp_Object sym, Lisp_Object funsym) | |
| 3091 { | |
| 3092 /* does not take into account variable aliasing. */ | |
| 3093 Lisp_Object valcontents = XSYMBOL (sym)->value; | |
| 3094 enum lisp_magic_handler slot; | |
| 3095 | |
| 3096 if (!SYMBOL_VALUE_LISP_MAGIC_P (valcontents)) | |
| 3097 return 0; | |
| 3098 slot = handler_type_from_function_symbol (funsym, 1); | |
| 3099 if (slot != MAGIC_HANDLER_SET_VALUE && slot != MAGIC_HANDLER_MAKE_UNBOUND | |
| 3100 && slot != MAGIC_HANDLER_MAKE_LOCAL) | |
| 3101 /* #### temporary kludge because we haven't implemented | |
| 3102 lisp-magic variables completely */ | |
| 3103 return 0; | |
| 3104 return !NILP (XSYMBOL_VALUE_LISP_MAGIC (valcontents)->handler[slot]); | |
| 3105 } | |
| 3106 | |
| 3107 static Lisp_Object | |
| 3108 fetch_value_maybe_past_magic (Lisp_Object sym, | |
| 3109 Lisp_Object follow_past_lisp_magic) | |
| 3110 { | |
| 3111 Lisp_Object value = XSYMBOL (sym)->value; | |
| 3112 if (SYMBOL_VALUE_LISP_MAGIC_P (value) | |
| 3113 && (EQ (follow_past_lisp_magic, Qt) | |
| 3114 || (!NILP (follow_past_lisp_magic) | |
| 3115 && !would_be_magic_handled (sym, follow_past_lisp_magic)))) | |
| 3116 value = XSYMBOL_VALUE_LISP_MAGIC (value)->shadowed; | |
| 3117 return value; | |
| 3118 } | |
| 3119 | |
| 3120 static Lisp_Object * | |
| 3121 value_slot_past_magic (Lisp_Object sym) | |
| 3122 { | |
| 3123 Lisp_Object *store_pointer = &XSYMBOL (sym)->value; | |
| 3124 | |
| 3125 if (SYMBOL_VALUE_LISP_MAGIC_P (*store_pointer)) | |
| 3126 store_pointer = &XSYMBOL_VALUE_LISP_MAGIC (sym)->shadowed; | |
| 3127 return store_pointer; | |
| 3128 } | |
| 3129 | |
| 3130 static Lisp_Object | |
| 3131 maybe_call_magic_handler (Lisp_Object sym, Lisp_Object funsym, int nargs, ...) | |
| 3132 { | |
| 3133 va_list vargs; | |
| 3134 Lisp_Object args[20]; /* should be enough ... */ | |
| 3135 int i; | |
| 3136 enum lisp_magic_handler htype; | |
| 3137 Lisp_Object legerdemain; | |
| 3138 struct symbol_value_lisp_magic *bfwd; | |
| 3139 | |
| 440 | 3140 assert (nargs >= 0 && nargs < countof (args)); |
| 428 | 3141 legerdemain = XSYMBOL (sym)->value; |
| 3142 assert (SYMBOL_VALUE_LISP_MAGIC_P (legerdemain)); | |
| 3143 bfwd = XSYMBOL_VALUE_LISP_MAGIC (legerdemain); | |
| 3144 | |
| 3145 va_start (vargs, nargs); | |
| 3146 for (i = 0; i < nargs; i++) | |
| 3147 args[i] = va_arg (vargs, Lisp_Object); | |
| 3148 va_end (vargs); | |
| 3149 | |
| 3150 htype = handler_type_from_function_symbol (funsym, 1); | |
| 3151 if (NILP (bfwd->handler[htype])) | |
| 3152 return Qunbound; | |
| 3153 /* #### should be reusing the arglist, not always consing anew. | |
| 3154 Repeated handler invocations should not cause repeated consing. | |
| 3155 Doesn't matter for now, because this is just a quick implementation | |
| 3156 for obsolescence support. */ | |
| 3157 return call5 (bfwd->handler[htype], sym, Flist (nargs, args), funsym, | |
| 3158 bfwd->harg[htype], Qnil); | |
| 3159 } | |
| 3160 | |
| 3161 DEFUN ("dontusethis-set-symbol-value-handler", Fdontusethis_set_symbol_value_handler, | |
| 3162 3, 5, 0, /* | |
| 3163 Don't you dare use this. | |
| 3164 If you do, suffer the wrath of Ben, who is likely to rename | |
| 3165 this function (or change the semantics of its arguments) without | |
| 3166 pity, thereby invalidating your code. | |
| 3167 */ | |
| 2286 | 3168 (variable, handler_type, handler, harg, |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4535
diff
changeset
|
3169 UNUSED (keep_existing ))) |
| 428 | 3170 { |
| 3171 Lisp_Object valcontents; | |
| 3172 struct symbol_value_lisp_magic *bfwd; | |
| 3173 enum lisp_magic_handler htype; | |
| 3174 int i; | |
| 3175 | |
| 3176 /* #### WARNING, only some handler types are implemented. See above. | |
| 3177 Actions of other types will ignore a handler if it's there. | |
| 3178 | |
| 3179 #### Also, `chain-to-symbol-value-handler' and | |
| 3180 `symbol-function-corresponding-function' are not implemented. */ | |
| 3181 CHECK_SYMBOL (variable); | |
| 3182 CHECK_SYMBOL (handler_type); | |
| 3183 htype = decode_magic_handler_type (handler_type); | |
| 3184 valcontents = XSYMBOL (variable)->value; | |
| 3185 if (!SYMBOL_VALUE_LISP_MAGIC_P (valcontents)) | |
| 3186 { | |
| 3017 | 3187 bfwd = ALLOC_LCRECORD_TYPE (struct symbol_value_lisp_magic, |
| 428 | 3188 &lrecord_symbol_value_lisp_magic); |
| 3189 bfwd->magic.type = SYMVAL_LISP_MAGIC; | |
| 3190 for (i = 0; i < MAGIC_HANDLER_MAX; i++) | |
| 3191 { | |
| 3192 bfwd->handler[i] = Qnil; | |
| 3193 bfwd->harg[i] = Qnil; | |
| 3194 } | |
| 3195 bfwd->shadowed = valcontents; | |
| 793 | 3196 XSYMBOL (variable)->value = wrap_symbol_value_magic (bfwd); |
| 428 | 3197 } |
| 3198 else | |
| 3199 bfwd = XSYMBOL_VALUE_LISP_MAGIC (valcontents); | |
| 3200 bfwd->handler[htype] = handler; | |
| 3201 bfwd->harg[htype] = harg; | |
| 3202 | |
| 3203 for (i = 0; i < MAGIC_HANDLER_MAX; i++) | |
| 3204 if (!NILP (bfwd->handler[i])) | |
| 3205 break; | |
| 3206 | |
| 3207 if (i == MAGIC_HANDLER_MAX) | |
| 3208 /* there are no remaining handlers, so remove the structure. */ | |
| 3209 XSYMBOL (variable)->value = bfwd->shadowed; | |
| 3210 | |
| 3211 return Qnil; | |
| 3212 } | |
| 3213 | |
| 3214 | |
| 3215 /* functions for working with variable aliases. */ | |
| 3216 | |
| 3217 /* Follow the chain of variable aliases for SYMBOL. Return the | |
| 3218 resulting symbol, whose value cell is guaranteed not to be a | |
| 3219 symbol-value-varalias. | |
| 3220 | |
| 3221 Also maybe follow past symbol-value-lisp-magic -> symbol-value-varalias. | |
| 3222 If FUNSYM is t, always follow in such a case. If FUNSYM is nil, | |
| 3223 never follow; stop right there. Otherwise FUNSYM should be a | |
| 3224 recognized symbol-value function symbol; this means, follow | |
| 3225 unless there is a special handler for the named function. | |
| 3226 | |
| 3227 OK, there is at least one reason why it's necessary for | |
| 3228 FOLLOW-PAST-LISP-MAGIC to be specified correctly: So that we | |
| 3229 can always be sure to catch cyclic variable aliasing. If we never | |
| 3230 follow past Lisp magic, then if the following is done: | |
| 3231 | |
| 3232 (defvaralias 'a 'b) | |
| 3233 add some magic behavior to a, but not a "get-value" handler | |
| 3234 (defvaralias 'b 'a) | |
| 3235 | |
| 3236 then an attempt to retrieve a's or b's value would cause infinite | |
| 3237 looping in `symbol-value'. | |
| 3238 | |
| 3239 We (of course) can't always follow past Lisp magic, because then | |
| 3240 we make any variable that is lisp-magic -> varalias behave as if | |
| 3241 the lisp-magic is not present at all. | |
| 3242 */ | |
| 3243 | |
| 3244 static Lisp_Object | |
| 3245 follow_varalias_pointers (Lisp_Object symbol, | |
| 3246 Lisp_Object follow_past_lisp_magic) | |
| 3247 { | |
| 3248 #define VARALIAS_INDIRECTION_SUSPICION_LENGTH 16 | |
| 3249 Lisp_Object tortoise, hare, val; | |
| 3250 int count; | |
| 3251 | |
| 3252 /* quick out just in case */ | |
| 3253 if (!SYMBOL_VALUE_MAGIC_P (XSYMBOL (symbol)->value)) | |
| 3254 return symbol; | |
| 3255 | |
| 3256 /* Compare implementation of indirect_function(). */ | |
| 3257 for (hare = tortoise = symbol, count = 0; | |
| 3258 val = fetch_value_maybe_past_magic (hare, follow_past_lisp_magic), | |
| 3259 SYMBOL_VALUE_VARALIAS_P (val); | |
| 3260 hare = symbol_value_varalias_aliasee (XSYMBOL_VALUE_VARALIAS (val)), | |
| 3261 count++) | |
| 3262 { | |
| 3263 if (count < VARALIAS_INDIRECTION_SUSPICION_LENGTH) continue; | |
| 3264 | |
| 3265 if (count & 1) | |
| 3266 tortoise = symbol_value_varalias_aliasee | |
| 3267 (XSYMBOL_VALUE_VARALIAS (fetch_value_maybe_past_magic | |
| 3268 (tortoise, follow_past_lisp_magic))); | |
| 3269 if (EQ (hare, tortoise)) | |
| 3270 return Fsignal (Qcyclic_variable_indirection, list1 (symbol)); | |
| 3271 } | |
| 3272 | |
| 3273 return hare; | |
| 3274 } | |
| 3275 | |
|
4502
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3276 /* Map FN over the chain of variable aliases for SYMBOL. If FN returns |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3277 something other than Qzero for some link in the chain, return that |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3278 immediately. Otherwise return Qzero (which is not a symbol). |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3279 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3280 FN may be called twice on the same symbol if the varalias chain is |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3281 cyclic. Prevent this by calling follow_varalias_pointers first for its |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3282 side-effects. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3283 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3284 Signals a cyclic-variable-indirection error if a cyclic structure is |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3285 detected. */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3286 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3287 static Lisp_Object |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3288 map_varalias_chain (Lisp_Object symbol, |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3289 Lisp_Object follow_past_lisp_magic, |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3290 Lisp_Object (*fn) (Lisp_Object arg)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3291 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3292 #define VARALIAS_INDIRECTION_SUSPICION_LENGTH 16 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3293 Lisp_Object tortoise, hare, val, res; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3294 int count; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3295 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3296 assert (fn); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3297 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3298 /* quick out just in case */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3299 if (!SYMBOL_VALUE_MAGIC_P (XSYMBOL (symbol)->value)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3300 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3301 return (fn)(symbol); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3302 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3303 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3304 /* Compare implementation of indirect_function(). */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3305 for (hare = tortoise = symbol, count = 0; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3306 val = fetch_value_maybe_past_magic (hare, follow_past_lisp_magic), |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3307 SYMBOL_VALUE_VARALIAS_P (val); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3308 hare = symbol_value_varalias_aliasee (XSYMBOL_VALUE_VARALIAS (val)), |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3309 count++) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3310 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3311 res = (fn) (hare); |
|
4503
af95657e0bfd
Use EQ() and !EQ() in symbols.c, thank you Robert Delius Royar.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4502
diff
changeset
|
3312 if (!EQ (Qzero, res)) |
|
4502
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3313 { |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3314 return res; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3315 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3316 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3317 if (count < VARALIAS_INDIRECTION_SUSPICION_LENGTH) continue; |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3318 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3319 if (count & 1) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3320 tortoise = symbol_value_varalias_aliasee |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3321 (XSYMBOL_VALUE_VARALIAS (fetch_value_maybe_past_magic |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3322 (tortoise, follow_past_lisp_magic))); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3323 if (EQ (hare, tortoise)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3324 return Fsignal (Qcyclic_variable_indirection, list1 (symbol)); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3325 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3326 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3327 return (fn) (hare); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3328 } |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3329 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3330 /* |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3331 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3332 OED entry, 2nd edition, IPA transliterated using Kirshenbaum: |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3333 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3334 alias ('eIlI@s, '&lI@s), adv. and n. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3335 [...] |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3336 B. n. (with pl. aliases.) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3337 1. Another name, an assumed name. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3338 1605 Camden Rem. (1614) 147 An Alias or double name cannot preiudice the honest. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3339 1831 Edin. Rev. LIII. 364 He has been assuming various aliases. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3340 1861 Macaulay Hist. Eng. V. 92 The monk who was sometimes called Harrison |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3341 and sometimes went by the alias of Johnson. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3342 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3343 The alias is the fake name. Let's try to follow that usage in our |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3344 documentation. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3345 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3346 */ |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3347 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3348 DEFUN ("defvaralias", Fdefvaralias, 2, 3, 0, /* |
| 428 | 3349 Define a variable as an alias for another variable. |
| 3350 Thenceforth, any operations performed on VARIABLE will actually be | |
|
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changeset
|
3351 performed on ALIASED. Both VARIABLE and ALIASED should be symbols. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3352 If ALIASED is nil and VARIABLE is an existing alias, remove that alias. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3353 ALIASED can itself be an alias, and the chain of variable aliases |
| 428 | 3354 will be followed appropriately. |
| 3355 If VARIABLE already has a value, this value will be shadowed | |
| 3356 until the alias is removed, at which point it will be restored. | |
| 3357 Currently VARIABLE cannot be a built-in variable, a variable that | |
| 3358 has a buffer-local value in any buffer, or the symbols nil or t. | |
|
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Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3359 \(ALIASED, however, can be any type of variable.) |
|
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Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3360 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3361 Optional argument DOCSTRING is documentation for VARIABLE in its use as an |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3362 alias for ALIASED. The XEmacs help code ignores this documentation, using |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4355
diff
changeset
|
3363 the documentation of ALIASED instead, and the docstring, if specified, is |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3364 not shadowed in the same way that the value is. Only use it if you know |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3365 what you're doing. |
| 428 | 3366 */ |
|
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diff
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|
3367 (variable, aliased, docstring)) |
| 428 | 3368 { |
| 3369 struct symbol_value_varalias *bfwd; | |
| 3370 Lisp_Object valcontents; | |
| 3371 | |
| 3372 CHECK_SYMBOL (variable); | |
| 3373 reject_constant_symbols (variable, Qunbound, 0, Qt); | |
| 3374 | |
| 3375 valcontents = XSYMBOL (variable)->value; | |
| 3376 | |
|
4502
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Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3377 if (NILP (aliased)) |
| 428 | 3378 { |
| 3379 if (SYMBOL_VALUE_VARALIAS_P (valcontents)) | |
| 3380 { | |
| 3381 XSYMBOL (variable)->value = | |
| 3382 symbol_value_varalias_shadowed | |
| 3383 (XSYMBOL_VALUE_VARALIAS (valcontents)); | |
| 3384 } | |
| 3385 return Qnil; | |
| 3386 } | |
| 3387 | |
|
4502
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Handle varalias chains, custom variables in #'user-variable-p.
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diff
changeset
|
3388 CHECK_SYMBOL (aliased); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3389 |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3390 if (!NILP (docstring)) |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3391 Fput (variable, Qvariable_documentation, docstring); |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3392 |
| 428 | 3393 if (SYMBOL_VALUE_VARALIAS_P (valcontents)) |
| 3394 { | |
| 3395 /* transmogrify */ | |
|
4502
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diff
changeset
|
3396 XSYMBOL_VALUE_VARALIAS (valcontents)->aliasee = aliased; |
| 428 | 3397 return Qnil; |
| 3398 } | |
| 3399 | |
| 3400 if (SYMBOL_VALUE_MAGIC_P (valcontents) | |
| 3401 && !UNBOUNDP (valcontents)) | |
| 563 | 3402 invalid_change ("Variable is magic and cannot be aliased", variable); |
| 428 | 3403 reject_constant_symbols (variable, Qunbound, 0, Qt); |
| 3404 | |
| 3017 | 3405 bfwd = ALLOC_LCRECORD_TYPE (struct symbol_value_varalias, |
| 428 | 3406 &lrecord_symbol_value_varalias); |
| 3407 bfwd->magic.type = SYMVAL_VARALIAS; | |
|
4502
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Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3408 bfwd->aliasee = aliased; |
| 428 | 3409 bfwd->shadowed = valcontents; |
| 3410 | |
| 793 | 3411 valcontents = wrap_symbol_value_magic (bfwd); |
| 428 | 3412 XSYMBOL (variable)->value = valcontents; |
| 3413 return Qnil; | |
| 3414 } | |
| 3415 | |
| 3416 DEFUN ("variable-alias", Fvariable_alias, 1, 2, 0, /* | |
|
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Handle varalias chains, custom variables in #'user-variable-p.
Aidan Kehoe <kehoea@parhasard.net>
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diff
changeset
|
3417 If VARIABLE is an alias of another variable, return that variable. |
|
8748a3f7ceb4
Handle varalias chains, custom variables in #'user-variable-p.
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4355
diff
changeset
|
3418 VARIABLE should be a symbol. If VARIABLE is not an alias, return nil. |
| 428 | 3419 Variable aliases are created with `defvaralias'. See also |
| 3420 `indirect-variable'. | |
| 3421 */ | |
| 3422 (variable, follow_past_lisp_magic)) | |
| 3423 { | |
| 3424 Lisp_Object valcontents; | |
| 3425 | |
| 3426 CHECK_SYMBOL (variable); | |
| 3427 if (!NILP (follow_past_lisp_magic) && !EQ (follow_past_lisp_magic, Qt)) | |
| 3428 { | |
| 3429 CHECK_SYMBOL (follow_past_lisp_magic); | |
| 3430 handler_type_from_function_symbol (follow_past_lisp_magic, 0); | |
| 3431 } | |
| 3432 | |
| 3433 valcontents = fetch_value_maybe_past_magic (variable, | |
| 3434 follow_past_lisp_magic); | |
| 3435 | |
| 3436 if (SYMBOL_VALUE_VARALIAS_P (valcontents)) | |
| 3437 return symbol_value_varalias_aliasee | |
| 3438 (XSYMBOL_VALUE_VARALIAS (valcontents)); | |
| 3439 else | |
| 3440 return Qnil; | |
| 3441 } | |
| 3442 | |
| 3443 DEFUN ("indirect-variable", Findirect_variable, 1, 2, 0, /* | |
| 3444 Return the variable at the end of OBJECT's variable-alias chain. | |
| 3445 If OBJECT is a symbol, follow all variable aliases and return | |
| 3446 the final (non-aliased) symbol. Variable aliases are created with | |
| 3447 the function `defvaralias'. | |
| 3448 If OBJECT is not a symbol, just return it. | |
| 3449 Signal a cyclic-variable-indirection error if there is a loop in the | |
| 3450 variable chain of symbols. | |
| 3451 */ | |
| 3452 (object, follow_past_lisp_magic)) | |
| 3453 { | |
| 3454 if (!SYMBOLP (object)) | |
| 3455 return object; | |
| 3456 if (!NILP (follow_past_lisp_magic) && !EQ (follow_past_lisp_magic, Qt)) | |
| 3457 { | |
| 3458 CHECK_SYMBOL (follow_past_lisp_magic); | |
| 3459 handler_type_from_function_symbol (follow_past_lisp_magic, 0); | |
| 3460 } | |
| 3461 return follow_varalias_pointers (object, follow_past_lisp_magic); | |
| 3462 } | |
| 3463 | |
| 1674 | 3464 DEFUN ("variable-binding-locus", Fvariable_binding_locus, 1, 1, 0, /* |
| 3465 Return a value indicating where VARIABLE's current binding comes from. | |
| 3466 If the current binding is buffer-local, the value is the current buffer. | |
| 3467 If the current binding is global (the default), the value is nil. | |
| 3468 */ | |
| 3469 (variable)) | |
| 3470 { | |
| 3471 Lisp_Object valcontents; | |
| 3472 | |
| 3473 CHECK_SYMBOL (variable); | |
| 3474 variable = Findirect_variable (variable, Qnil); | |
| 3475 | |
| 3476 /* Make sure the current binding is actually swapped in. */ | |
| 3477 find_symbol_value (variable); | |
| 3478 | |
| 3479 valcontents = XSYMBOL (variable)->value; | |
| 3480 | |
| 3481 if (SYMBOL_VALUE_MAGIC_P (valcontents) | |
| 3482 && ((XSYMBOL_VALUE_MAGIC_TYPE (valcontents) == SYMVAL_BUFFER_LOCAL) | |
| 3483 || (XSYMBOL_VALUE_MAGIC_TYPE (valcontents) == SYMVAL_SOME_BUFFER_LOCAL)) | |
| 3484 && (!NILP (Flocal_variable_p (variable, Fcurrent_buffer (), Qnil)))) | |
| 3485 return Fcurrent_buffer (); | |
| 3486 else | |
| 3487 return Qnil; | |
| 3488 } | |
| 428 | 3489 |
| 3490 /************************************************************************/ | |
| 3491 /* initialization */ | |
| 3492 /************************************************************************/ | |
| 3493 | |
| 3494 /* A dumped XEmacs image has a lot more than 1511 symbols. Last | |
| 3495 estimate was that there were actually around 6300. So let's try | |
| 3496 making this bigger and see if we get better hashing behavior. */ | |
| 3497 #define OBARRAY_SIZE 16411 | |
| 3498 | |
| 3499 #ifndef Qzero | |
| 3500 Lisp_Object Qzero; | |
| 3501 #endif | |
| 3502 #ifndef Qnull_pointer | |
| 3503 Lisp_Object Qnull_pointer; | |
| 3504 #endif | |
| 3505 | |
| 3263 | 3506 #ifndef NEW_GC |
| 428 | 3507 /* some losing systems can't have static vars at function scope... */ |
| 442 | 3508 static const struct symbol_value_magic guts_of_unbound_marker = |
| 3509 { /* struct symbol_value_magic */ | |
| 3024 | 3510 { /* struct old_lcrecord_header */ |
| 442 | 3511 { /* struct lrecord_header */ |
| 3512 lrecord_type_symbol_value_forward, /* lrecord_type_index */ | |
| 3513 1, /* mark bit */ | |
| 3514 1, /* c_readonly bit */ | |
| 3515 1, /* lisp_readonly bit */ | |
| 3516 }, | |
| 3517 0, /* next */ | |
| 3518 0, /* uid */ | |
| 3519 0, /* free */ | |
| 3520 }, | |
| 3521 0, /* value */ | |
| 3522 SYMVAL_UNBOUND_MARKER | |
| 3523 }; | |
| 3263 | 3524 #endif /* not NEW_GC */ |
| 428 | 3525 |
| 3526 void | |
| 3527 init_symbols_once_early (void) | |
| 3528 { | |
| 442 | 3529 INIT_LRECORD_IMPLEMENTATION (symbol); |
| 3530 INIT_LRECORD_IMPLEMENTATION (symbol_value_forward); | |
| 3531 INIT_LRECORD_IMPLEMENTATION (symbol_value_buffer_local); | |
| 3532 INIT_LRECORD_IMPLEMENTATION (symbol_value_lisp_magic); | |
| 3533 INIT_LRECORD_IMPLEMENTATION (symbol_value_varalias); | |
| 3534 | |
| 1204 | 3535 reinit_symbols_early (); |
| 428 | 3536 |
| 3537 /* Bootstrapping problem: Qnil isn't set when make_string_nocopy is | |
| 3538 called the first time. */ | |
| 867 | 3539 Qnil = Fmake_symbol (make_string_nocopy ((const Ibyte *) "nil", 3)); |
| 793 | 3540 XSTRING_PLIST (XSYMBOL (Qnil)->name) = Qnil; |
| 428 | 3541 XSYMBOL (Qnil)->value = Qnil; /* Nihil ex nihil */ |
| 3542 XSYMBOL (Qnil)->plist = Qnil; | |
| 3543 | |
| 3544 Vobarray = make_vector (OBARRAY_SIZE, Qzero); | |
| 3545 initial_obarray = Vobarray; | |
| 3546 staticpro (&initial_obarray); | |
| 3547 /* Intern nil in the obarray */ | |
| 3548 { | |
| 793 | 3549 unsigned int hash = hash_string (XSTRING_DATA (XSYMBOL (Qnil)->name), 3); |
| 428 | 3550 XVECTOR_DATA (Vobarray)[hash % OBARRAY_SIZE] = Qnil; |
| 3551 } | |
| 3552 | |
| 3553 { | |
| 3554 /* Required to get around a GCC syntax error on certain | |
| 3555 architectures */ | |
| 3263 | 3556 #ifdef NEW_GC |
| 2720 | 3557 struct symbol_value_magic *tem = (struct symbol_value_magic *) |
| 3558 mc_alloc (sizeof (struct symbol_value_magic)); | |
| 3559 MARK_LRECORD_AS_LISP_READONLY (tem); | |
| 3560 MARK_LRECORD_AS_NOT_FREE (tem); | |
| 3561 tem->header.type = lrecord_type_symbol_value_forward; | |
| 3562 mcpro (wrap_pointer_1 (tem)); | |
| 3563 tem->value = 0; | |
| 3564 tem->type = SYMVAL_UNBOUND_MARKER; | |
| 2994 | 3565 #ifdef ALLOC_TYPE_STATS |
| 2775 | 3566 inc_lrecord_stats (sizeof (struct symbol_value_magic), |
| 3567 (const struct lrecord_header *) tem); | |
| 2994 | 3568 #endif /* ALLOC_TYPE_STATS */ |
| 3263 | 3569 #else /* not NEW_GC */ |
| 442 | 3570 const struct symbol_value_magic *tem = &guts_of_unbound_marker; |
| 3263 | 3571 #endif /* not NEW_GC */ |
| 428 | 3572 |
| 793 | 3573 Qunbound = wrap_symbol_value_magic (tem); |
| 428 | 3574 } |
| 3575 | |
| 3576 XSYMBOL (Qnil)->function = Qunbound; | |
| 3577 | |
| 563 | 3578 DEFSYMBOL (Qt); |
| 444 | 3579 XSYMBOL (Qt)->value = Qt; /* Veritas aeterna */ |
| 428 | 3580 Vquit_flag = Qnil; |
| 3581 | |
| 1204 | 3582 dump_add_root_lisp_object (&Qnil); |
| 3583 dump_add_root_lisp_object (&Qunbound); | |
| 3584 dump_add_root_lisp_object (&Vquit_flag); | |
| 428 | 3585 } |
| 3586 | |
| 3587 void | |
| 1204 | 3588 reinit_symbols_early (void) |
| 440 | 3589 { |
| 3590 } | |
| 3591 | |
| 442 | 3592 static void |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4940
diff
changeset
|
3593 defsymbol_massage_name_1 (Lisp_Object *location, const Ascbyte *name, int dump_p, |
| 442 | 3594 int multiword_predicate_p) |
| 3595 { | |
| 3596 char temp[500]; | |
| 3597 int len = strlen (name) - 1; | |
| 3598 int i; | |
| 3599 | |
| 3600 if (multiword_predicate_p) | |
| 647 | 3601 assert (len + 1 < (int) sizeof (temp)); |
| 442 | 3602 else |
| 647 | 3603 assert (len < (int) sizeof (temp)); |
| 442 | 3604 strcpy (temp, name + 1); /* Remove initial Q */ |
| 3605 if (multiword_predicate_p) | |
| 3606 { | |
| 3607 strcpy (temp + len - 1, "_p"); | |
| 3608 len++; | |
| 3609 } | |
| 3610 for (i = 0; i < len; i++) | |
| 3611 if (temp[i] == '_') | |
| 3612 temp[i] = '-'; | |
| 867 | 3613 *location = Fintern (make_string ((const Ibyte *) temp, len), Qnil); |
| 442 | 3614 if (dump_p) |
| 3615 staticpro (location); | |
| 3616 else | |
| 3617 staticpro_nodump (location); | |
| 3618 } | |
| 3619 | |
| 440 | 3620 void |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
3621 defsymbol_massage_name_nodump (Lisp_Object *location, const Ascbyte *name) |
| 442 | 3622 { |
| 3623 defsymbol_massage_name_1 (location, name, 0, 0); | |
| 3624 } | |
| 3625 | |
| 3626 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
3627 defsymbol_massage_name (Lisp_Object *location, const Ascbyte *name) |
| 428 | 3628 { |
| 442 | 3629 defsymbol_massage_name_1 (location, name, 1, 0); |
| 3630 } | |
| 3631 | |
| 3632 void | |
| 3633 defsymbol_massage_multiword_predicate_nodump (Lisp_Object *location, | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
3634 const Ascbyte *name) |
| 442 | 3635 { |
| 3636 defsymbol_massage_name_1 (location, name, 0, 1); | |
| 3637 } | |
| 3638 | |
| 3639 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
4940
diff
changeset
|
3640 defsymbol_massage_multiword_predicate (Lisp_Object *location, const Ascbyte *name) |
| 442 | 3641 { |
| 3642 defsymbol_massage_name_1 (location, name, 1, 1); | |
| 3643 } | |
| 3644 | |
| 3645 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3646 defsymbol_nodump (Lisp_Object *location, const Ascbyte *name) |
| 442 | 3647 { |
| 867 | 3648 *location = Fintern (make_string_nocopy ((const Ibyte *) name, |
| 428 | 3649 strlen (name)), |
| 3650 Qnil); | |
| 3651 staticpro_nodump (location); | |
| 3652 } | |
| 3653 | |
| 3654 void | |
|
4952
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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4940
diff
changeset
|
3655 defsymbol (Lisp_Object *location, const Ascbyte *name) |
| 428 | 3656 { |
| 867 | 3657 *location = Fintern (make_string_nocopy ((const Ibyte *) name, |
| 428 | 3658 strlen (name)), |
| 3659 Qnil); | |
| 3660 staticpro (location); | |
| 3661 } | |
| 3662 | |
| 3663 void | |
|
4952
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Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
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changeset
|
3664 defkeyword (Lisp_Object *location, const Ascbyte *name) |
| 428 | 3665 { |
| 3666 defsymbol (location, name); | |
| 3667 Fset (*location, *location); | |
| 3668 } | |
| 3669 | |
| 442 | 3670 void |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
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changeset
|
3671 defkeyword_massage_name (Lisp_Object *location, const Ascbyte *name) |
| 442 | 3672 { |
| 3673 char temp[500]; | |
| 3674 int len = strlen (name); | |
| 3675 | |
| 647 | 3676 assert (len < (int) sizeof (temp)); |
| 442 | 3677 strcpy (temp, name); |
| 3678 temp[1] = ':'; /* it's an underscore in the C variable */ | |
| 3679 | |
| 3680 defsymbol_massage_name (location, temp); | |
| 3681 Fset (*location, *location); | |
| 3682 } | |
| 3683 | |
| 428 | 3684 #ifdef DEBUG_XEMACS |
| 930 | 3685 /* Check that nobody spazzed writing a builtin (non-module) DEFUN. */ |
| 428 | 3686 static void |
| 3687 check_sane_subr (Lisp_Subr *subr, Lisp_Object sym) | |
| 3688 { | |
| 930 | 3689 if (!initialized) { |
| 3690 assert (subr->min_args >= 0); | |
| 3691 assert (subr->min_args <= SUBR_MAX_ARGS); | |
| 3692 | |
| 3693 if (subr->max_args != MANY && | |
| 3694 subr->max_args != UNEVALLED) | |
| 3695 { | |
| 3696 /* Need to fix lisp.h and eval.c if SUBR_MAX_ARGS too small */ | |
| 3697 assert (subr->max_args <= SUBR_MAX_ARGS); | |
| 3698 assert (subr->min_args <= subr->max_args); | |
| 3699 } | |
| 3700 assert (UNBOUNDP (XSYMBOL (sym)->function)); | |
| 3701 } | |
| 428 | 3702 } |
| 3703 #else | |
| 3704 #define check_sane_subr(subr, sym) /* nothing */ | |
| 3705 #endif | |
| 3706 | |
| 3707 #ifdef HAVE_SHLIB | |
| 3263 | 3708 #ifndef NEW_GC |
| 428 | 3709 /* |
| 3710 * If we are not in a pure undumped Emacs, we need to make a duplicate of | |
| 3711 * the subr. This is because the only time this function will be called | |
| 3712 * in a running Emacs is when a dynamically loaded module is adding a | |
| 3713 * subr, and we need to make sure that the subr is in allocated, Lisp- | |
| 3714 * accessible memory. The address assigned to the static subr struct | |
| 3715 * in the shared object will be a trampoline address, so we need to create | |
| 3716 * a copy here to ensure that a real address is used. | |
| 3717 * | |
| 3718 * Once we have copied everything across, we re-use the original static | |
| 3719 * structure to store a pointer to the newly allocated one. This will be | |
| 3720 * used in emodules.c by emodules_doc_subr() to find a pointer to the | |
| 442 | 3721 * allocated object so that we can set its doc string properly. |
| 428 | 3722 * |
| 442 | 3723 * NOTE: We don't actually use the DOC pointer here any more, but we did |
| 428 | 3724 * in an earlier implementation of module support. There is no harm in |
| 3725 * setting it here in case we ever need it in future implementations. | |
| 3726 * subr->doc will point to the new subr structure that was allocated. | |
| 442 | 3727 * Code can then get this value from the static subr structure and use |
| 428 | 3728 * it if required. |
| 3729 * | |
| 442 | 3730 * FIXME: Should newsubr be staticpro()'ed? I don't think so but I need |
| 428 | 3731 * a guru to check. |
| 3732 */ | |
| 930 | 3733 #define check_module_subr(subr) \ |
| 3734 do { \ | |
| 3735 if (initialized) { \ | |
| 3736 Lisp_Subr *newsubr; \ | |
| 3737 Lisp_Object f; \ | |
| 3738 \ | |
| 3739 if (subr->min_args < 0) \ | |
| 3740 signal_ferror (Qdll_error, "%s min_args (%hd) too small", \ | |
| 3741 subr_name (subr), subr->min_args); \ | |
| 3742 if (subr->min_args > SUBR_MAX_ARGS) \ | |
| 3743 signal_ferror (Qdll_error, "%s min_args (%hd) too big (max = %d)", \ | |
| 3744 subr_name (subr), subr->min_args, SUBR_MAX_ARGS); \ | |
| 3745 \ | |
| 3746 if (subr->max_args != MANY && \ | |
| 3747 subr->max_args != UNEVALLED) \ | |
| 3748 { \ | |
| 3749 /* Need to fix lisp.h and eval.c if SUBR_MAX_ARGS too small */ \ | |
| 3750 if (subr->max_args > SUBR_MAX_ARGS) \ | |
| 3751 signal_ferror (Qdll_error, "%s max_args (%hd) too big (max = %d)", \ | |
| 3752 subr_name (subr), subr->max_args, SUBR_MAX_ARGS); \ | |
| 3753 if (subr->min_args > subr->max_args) \ | |
| 3754 signal_ferror (Qdll_error, "%s min_args (%hd) > max_args (%hd)", \ | |
| 3755 subr_name (subr), subr->min_args, subr->max_args); \ | |
| 3756 } \ | |
| 3757 \ | |
| 3758 f = XSYMBOL (sym)->function; \ | |
| 3759 if (!UNBOUNDP (f) && (!CONSP (f) || !EQ (XCAR (f), Qautoload))) \ | |
| 3760 signal_ferror (Qdll_error, "Attempt to redefine %s", subr_name (subr)); \ | |
| 3761 \ | |
| 2367 | 3762 newsubr = xnew (Lisp_Subr); \ |
| 930 | 3763 memcpy (newsubr, subr, sizeof (Lisp_Subr)); \ |
|
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diff
changeset
|
3764 subr->doc = (const CIbyte *)newsubr; \ |
| 930 | 3765 subr = newsubr; \ |
| 3766 } \ | |
| 428 | 3767 } while (0) |
| 3263 | 3768 #else /* NEW_GC */ |
| 2963 | 3769 /* |
| 3770 * If we have the new allocator enabled, we do not need to make a | |
| 3771 * duplicate of the subr. The new allocator already does allocate all | |
| 3772 * subrs in Lisp-accessible memory rather than have it in the static | |
| 3773 * subr struct. | |
| 3774 * | |
| 3775 * NOTE: The DOC pointer is not set here as described above. | |
| 3776 */ | |
| 3777 #define check_module_subr(subr) \ | |
| 3778 do { \ | |
| 3779 if (initialized) { \ | |
| 3780 Lisp_Object f; \ | |
| 3781 \ | |
| 3782 if (subr->min_args < 0) \ | |
| 3783 signal_ferror (Qdll_error, "%s min_args (%hd) too small", \ | |
| 3784 subr_name (subr), subr->min_args); \ | |
| 3785 if (subr->min_args > SUBR_MAX_ARGS) \ | |
| 3786 signal_ferror (Qdll_error, "%s min_args (%hd) too big (max = %d)", \ | |
| 3787 subr_name (subr), subr->min_args, SUBR_MAX_ARGS); \ | |
| 3788 \ | |
| 3789 if (subr->max_args != MANY && \ | |
| 3790 subr->max_args != UNEVALLED) \ | |
| 3791 { \ | |
| 3792 /* Need to fix lisp.h and eval.c if SUBR_MAX_ARGS too small */ \ | |
| 3793 if (subr->max_args > SUBR_MAX_ARGS) \ | |
| 3794 signal_ferror (Qdll_error, "%s max_args (%hd) too big (max = %d)", \ | |
| 3795 subr_name (subr), subr->max_args, SUBR_MAX_ARGS); \ | |
| 3796 if (subr->min_args > subr->max_args) \ | |
| 3797 signal_ferror (Qdll_error, "%s min_args (%hd) > max_args (%hd)", \ | |
| 3798 subr_name (subr), subr->min_args, subr->max_args); \ | |
| 3799 } \ | |
| 3800 \ | |
| 3801 f = XSYMBOL (sym)->function; \ | |
| 3802 if (!UNBOUNDP (f) && (!CONSP (f) || !EQ (XCAR (f), Qautoload))) \ | |
| 3803 signal_ferror (Qdll_error, "Attempt to redefine %s", subr_name (subr)); \ | |
| 3804 } \ | |
| 3805 } while (0) | |
| 3263 | 3806 #endif /* NEW_GC */ |
| 428 | 3807 #else /* ! HAVE_SHLIB */ |
| 930 | 3808 #define check_module_subr(subr) |
| 428 | 3809 #endif |
| 3810 | |
| 3811 void | |
| 3812 defsubr (Lisp_Subr *subr) | |
| 3813 { | |
| 3814 Lisp_Object sym = intern (subr_name (subr)); | |
| 3815 Lisp_Object fun; | |
| 3816 | |
| 3817 check_sane_subr (subr, sym); | |
| 930 | 3818 check_module_subr (subr); |
| 428 | 3819 |
| 793 | 3820 fun = wrap_subr (subr); |
| 428 | 3821 XSYMBOL (sym)->function = fun; |
| 996 | 3822 |
| 3823 #ifdef HAVE_SHLIB | |
| 3824 /* If it is declared in a module, update the load history */ | |
| 3825 if (initialized) | |
| 3826 LOADHIST_ATTACH (sym); | |
| 3827 #endif | |
| 428 | 3828 } |
| 3829 | |
| 3830 /* Define a lisp macro using a Lisp_Subr. */ | |
| 3831 void | |
| 3832 defsubr_macro (Lisp_Subr *subr) | |
| 3833 { | |
| 3834 Lisp_Object sym = intern (subr_name (subr)); | |
| 3835 Lisp_Object fun; | |
| 3836 | |
| 3837 check_sane_subr (subr, sym); | |
| 930 | 3838 check_module_subr (subr); |
| 428 | 3839 |
| 793 | 3840 fun = wrap_subr (subr); |
| 428 | 3841 XSYMBOL (sym)->function = Fcons (Qmacro, fun); |
| 996 | 3842 |
| 3843 #ifdef HAVE_SHLIB | |
| 3844 /* If it is declared in a module, update the load history */ | |
| 3845 if (initialized) | |
| 3846 LOADHIST_ATTACH (sym); | |
| 3847 #endif | |
| 428 | 3848 } |
| 3849 | |
| 442 | 3850 static void |
|
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changeset
|
3851 deferror_1 (Lisp_Object *symbol, const Ascbyte *name, const Ascbyte *messuhhj, |
| 442 | 3852 Lisp_Object inherits_from, int massage_p) |
| 428 | 3853 { |
| 3854 Lisp_Object conds; | |
| 442 | 3855 if (massage_p) |
| 3856 defsymbol_massage_name (symbol, name); | |
| 3857 else | |
| 3858 defsymbol (symbol, name); | |
| 428 | 3859 |
| 3860 assert (SYMBOLP (inherits_from)); | |
| 3861 conds = Fget (inherits_from, Qerror_conditions, Qnil); | |
| 3862 Fput (*symbol, Qerror_conditions, Fcons (*symbol, conds)); | |
| 771 | 3863 /* NOT build_msg_string (). This function is called at load time |
| 428 | 3864 and the string needs to get translated at run time. (This happens |
| 3865 in the function (display-error) in cmdloop.el.) */ | |
|
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changeset
|
3866 Fput (*symbol, Qerror_message, build_defer_string (messuhhj)); |
| 428 | 3867 } |
| 3868 | |
| 3869 void | |
|
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changeset
|
3870 deferror (Lisp_Object *symbol, const Ascbyte *name, const Ascbyte *messuhhj, |
| 442 | 3871 Lisp_Object inherits_from) |
| 3872 { | |
| 3873 deferror_1 (symbol, name, messuhhj, inherits_from, 0); | |
| 3874 } | |
| 3875 | |
| 3876 void | |
|
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diff
changeset
|
3877 deferror_massage_name (Lisp_Object *symbol, const Ascbyte *name, |
|
19a72041c5ed
Mule-izing, various fixes related to char * arguments
Ben Wing <ben@xemacs.org>
parents:
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diff
changeset
|
3878 const Ascbyte *messuhhj, Lisp_Object inherits_from) |
| 442 | 3879 { |
| 3880 deferror_1 (symbol, name, messuhhj, inherits_from, 1); | |
| 3881 } | |
| 3882 | |
| 3883 void | |
|
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diff
changeset
|
3884 deferror_massage_name_and_message (Lisp_Object *symbol, const Ascbyte *name, |
| 442 | 3885 Lisp_Object inherits_from) |
| 3886 { | |
| 3887 char temp[500]; | |
| 3888 int i; | |
| 3889 int len = strlen (name) - 1; | |
| 3890 | |
| 647 | 3891 assert (len < (int) sizeof (temp)); |
| 442 | 3892 strcpy (temp, name + 1); /* Remove initial Q */ |
| 3893 temp[0] = toupper (temp[0]); | |
| 3894 for (i = 0; i < len; i++) | |
| 3895 if (temp[i] == '_') | |
| 3896 temp[i] = ' '; | |
| 3897 | |
| 3898 deferror_1 (symbol, name, temp, inherits_from, 1); | |
| 3899 } | |
| 3900 | |
| 3901 void | |
| 428 | 3902 syms_of_symbols (void) |
| 3903 { | |
| 442 | 3904 DEFSYMBOL (Qvariable_documentation); |
| 3905 DEFSYMBOL (Qvariable_domain); /* I18N3 */ | |
| 3906 DEFSYMBOL (Qad_advice_info); | |
| 3907 DEFSYMBOL (Qad_activate); | |
| 3908 | |
| 3909 DEFSYMBOL (Qget_value); | |
| 3910 DEFSYMBOL (Qset_value); | |
| 3911 DEFSYMBOL (Qbound_predicate); | |
| 3912 DEFSYMBOL (Qmake_unbound); | |
| 3913 DEFSYMBOL (Qlocal_predicate); | |
| 3914 DEFSYMBOL (Qmake_local); | |
| 3915 | |
| 3916 DEFSYMBOL (Qboundp); | |
| 3917 DEFSYMBOL (Qglobally_boundp); | |
| 3918 DEFSYMBOL (Qmakunbound); | |
| 3919 DEFSYMBOL (Qsymbol_value); | |
| 3920 DEFSYMBOL (Qset); | |
| 3921 DEFSYMBOL (Qsetq_default); | |
| 3922 DEFSYMBOL (Qdefault_boundp); | |
| 3923 DEFSYMBOL (Qdefault_value); | |
| 3924 DEFSYMBOL (Qset_default); | |
| 3925 DEFSYMBOL (Qmake_variable_buffer_local); | |
| 3926 DEFSYMBOL (Qmake_local_variable); | |
| 3927 DEFSYMBOL (Qkill_local_variable); | |
| 3928 DEFSYMBOL (Qkill_console_local_variable); | |
| 3929 DEFSYMBOL (Qsymbol_value_in_buffer); | |
| 3930 DEFSYMBOL (Qsymbol_value_in_console); | |
| 3931 DEFSYMBOL (Qlocal_variable_p); | |
| 3932 DEFSYMBOL (Qconst_integer); | |
| 3933 DEFSYMBOL (Qconst_boolean); | |
| 3934 DEFSYMBOL (Qconst_object); | |
| 3935 DEFSYMBOL (Qconst_specifier); | |
| 3936 DEFSYMBOL (Qdefault_buffer); | |
| 3937 DEFSYMBOL (Qcurrent_buffer); | |
| 3938 DEFSYMBOL (Qconst_current_buffer); | |
| 3939 DEFSYMBOL (Qdefault_console); | |
| 3940 DEFSYMBOL (Qselected_console); | |
| 3941 DEFSYMBOL (Qconst_selected_console); | |
| 428 | 3942 |
| 3943 DEFSUBR (Fintern); | |
| 3944 DEFSUBR (Fintern_soft); | |
| 3945 DEFSUBR (Funintern); | |
| 3946 DEFSUBR (Fmapatoms); | |
| 3947 DEFSUBR (Fapropos_internal); | |
| 3948 | |
| 3949 DEFSUBR (Fsymbol_function); | |
| 3950 DEFSUBR (Fsymbol_plist); | |
| 3951 DEFSUBR (Fsymbol_name); | |
| 3952 DEFSUBR (Fmakunbound); | |
| 3953 DEFSUBR (Ffmakunbound); | |
| 3954 DEFSUBR (Fboundp); | |
| 3955 DEFSUBR (Fglobally_boundp); | |
| 3956 DEFSUBR (Ffboundp); | |
| 3957 DEFSUBR (Ffset); | |
| 3958 DEFSUBR (Fdefine_function); | |
| 3959 Ffset (intern ("defalias"), intern ("define-function")); | |
| 3368 | 3960 DEFSUBR (Fsubr_name); |
|
4336
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parents:
3497
diff
changeset
|
3961 DEFSUBR (Fspecial_form_p); |
| 428 | 3962 DEFSUBR (Fsetplist); |
| 3963 DEFSUBR (Fsymbol_value_in_buffer); | |
| 3964 DEFSUBR (Fsymbol_value_in_console); | |
| 3965 DEFSUBR (Fbuilt_in_variable_type); | |
| 3966 DEFSUBR (Fsymbol_value); | |
| 3967 DEFSUBR (Fset); | |
| 3968 DEFSUBR (Fdefault_boundp); | |
| 3969 DEFSUBR (Fdefault_value); | |
| 3970 DEFSUBR (Fset_default); | |
| 3971 DEFSUBR (Fsetq_default); | |
| 3972 DEFSUBR (Fmake_variable_buffer_local); | |
| 3973 DEFSUBR (Fmake_local_variable); | |
| 3974 DEFSUBR (Fkill_local_variable); | |
| 3975 DEFSUBR (Fkill_console_local_variable); | |
| 3976 DEFSUBR (Flocal_variable_p); | |
|
4502
8748a3f7ceb4
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Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3977 DEFSUBR (Fcustom_variable_p); |
|
8748a3f7ceb4
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Aidan Kehoe <kehoea@parhasard.net>
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4355
diff
changeset
|
3978 DEFSUBR (Fuser_variable_p); |
| 428 | 3979 DEFSUBR (Fdefvaralias); |
| 3980 DEFSUBR (Fvariable_alias); | |
| 3981 DEFSUBR (Findirect_variable); | |
| 1674 | 3982 DEFSUBR (Fvariable_binding_locus); |
| 428 | 3983 DEFSUBR (Fdontusethis_set_symbol_value_handler); |
| 3984 } | |
| 3985 | |
| 3986 /* Create and initialize a Lisp variable whose value is forwarded to C data */ | |
| 3987 void | |
|
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|
3988 defvar_magic (const Ascbyte *symbol_name, |
|
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diff
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|
3989 const struct symbol_value_forward *magic) |
| 428 | 3990 { |
| 442 | 3991 Lisp_Object sym; |
| 428 | 3992 |
| 996 | 3993 #ifdef HAVE_SHLIB |
| 428 | 3994 /* |
| 3995 * As with defsubr(), this will only be called in a dumped Emacs when | |
| 3996 * we are adding variables from a dynamically loaded module. That means | |
| 3997 * we can't use purespace. Take that into account. | |
| 3998 */ | |
| 3999 if (initialized) | |
| 996 | 4000 { |
|
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diff
changeset
|
4001 sym = Fintern (build_ascstring (symbol_name), Qnil); |
| 996 | 4002 LOADHIST_ATTACH (sym); |
| 4003 } | |
| 428 | 4004 else |
| 4005 #endif | |
| 867 | 4006 sym = Fintern (make_string_nocopy ((const Ibyte *) symbol_name, |
| 428 | 4007 strlen (symbol_name)), Qnil); |
| 4008 | |
| 793 | 4009 XSYMBOL (sym)->value = wrap_pointer_1 (magic); |
| 428 | 4010 } |
| 4011 | |
| 4012 void | |
| 4013 vars_of_symbols (void) | |
| 4014 { | |
| 4015 DEFVAR_LISP ("obarray", &Vobarray /* | |
| 4016 Symbol table for use by `intern' and `read'. | |
| 4017 It is a vector whose length ought to be prime for best results. | |
| 4018 The vector's contents don't make sense if examined from Lisp programs; | |
| 4019 to find all the symbols in an obarray, use `mapatoms'. | |
| 4020 */ ); | |
| 4021 /* obarray has been initialized long before */ | |
| 4022 } |