1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/types.h>
24 #include <sys/param.h>
27 /* in 4.1, param.h fails to define this. */
28 #define MAXPATHLEN 1024
29 #endif /* not MAXPATHLEN */
33 #include "intervals.h"
38 #include "blockinput.h"
40 struct buffer
*current_buffer
; /* the current buffer */
42 /* First buffer in chain of all buffers (in reverse order of creation).
43 Threaded through ->next. */
45 struct buffer
*all_buffers
;
47 /* This structure holds the default values of the buffer-local variables
48 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
49 The default value occupies the same slot in this structure
50 as an individual buffer's value occupies in that buffer.
51 Setting the default value also goes through the alist of buffers
52 and stores into each buffer that does not say it has a local value. */
54 struct buffer buffer_defaults
;
56 /* A Lisp_Object pointer to the above, used for staticpro */
58 static Lisp_Object Vbuffer_defaults
;
60 /* This structure marks which slots in a buffer have corresponding
61 default values in buffer_defaults.
62 Each such slot has a nonzero value in this structure.
63 The value has only one nonzero bit.
65 When a buffer has its own local value for a slot,
66 the bit for that slot (found in the same slot in this structure)
67 is turned on in the buffer's local_var_flags slot.
69 If a slot in this structure is -1, then even though there may
70 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
71 and the corresponding slot in buffer_defaults is not used.
73 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
74 but there is a default value which is copied into each buffer.
76 If a slot in this structure is negative, then even though there may
77 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
78 and the corresponding slot in buffer_defaults is not used.
80 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
81 zero, that is a bug */
83 struct buffer buffer_local_flags
;
85 /* This structure holds the names of symbols whose values may be
86 buffer-local. It is indexed and accessed in the same way as the above. */
88 struct buffer buffer_local_symbols
;
89 /* A Lisp_Object pointer to the above, used for staticpro */
90 static Lisp_Object Vbuffer_local_symbols
;
92 /* This structure holds the required types for the values in the
93 buffer-local slots. If a slot contains Qnil, then the
94 corresponding buffer slot may contain a value of any type. If a
95 slot contains an integer, then prospective values' tags must be
96 equal to that integer. When a tag does not match, the function
97 buffer_slot_type_mismatch will signal an error. */
98 struct buffer buffer_local_types
;
100 Lisp_Object
Fset_buffer ();
101 void set_buffer_internal ();
102 static void call_overlay_mod_hooks ();
104 /* Alist of all buffer names vs the buffers. */
105 /* This used to be a variable, but is no longer,
106 to prevent lossage due to user rplac'ing this alist or its elements. */
107 Lisp_Object Vbuffer_alist
;
109 /* Functions to call before and after each text change. */
110 Lisp_Object Vbefore_change_function
;
111 Lisp_Object Vafter_change_function
;
112 Lisp_Object Vbefore_change_functions
;
113 Lisp_Object Vafter_change_functions
;
115 Lisp_Object Vtransient_mark_mode
;
117 /* t means ignore all read-only text properties.
118 A list means ignore such a property if its value is a member of the list.
119 Any non-nil value means ignore buffer-read-only. */
120 Lisp_Object Vinhibit_read_only
;
122 /* List of functions to call that can query about killing a buffer.
123 If any of these functions returns nil, we don't kill it. */
124 Lisp_Object Vkill_buffer_query_functions
;
126 /* List of functions to call before changing an unmodified buffer. */
127 Lisp_Object Vfirst_change_hook
;
128 Lisp_Object Qfirst_change_hook
;
130 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
132 Lisp_Object Qprotected_field
;
134 Lisp_Object QSFundamental
; /* A string "Fundamental" */
136 Lisp_Object Qkill_buffer_hook
;
138 Lisp_Object Qget_file_buffer
;
140 Lisp_Object Qoverlayp
;
142 Lisp_Object Qpriority
, Qwindow
;
144 Lisp_Object Qmodification_hooks
;
145 Lisp_Object Qinsert_in_front_hooks
;
146 Lisp_Object Qinsert_behind_hooks
;
148 /* For debugging; temporary. See set_buffer_internal. */
149 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
154 if (XTYPE (spec
) == Lisp_String
)
155 error ("No buffer named %s", XSTRING (spec
)->data
);
156 error ("Invalid buffer argument");
159 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 0, 0,
160 "Return a list of all existing live buffers.")
163 return Fmapcar (Qcdr
, Vbuffer_alist
);
166 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
167 "Return the buffer named NAME (a string).\n\
168 If there is no live buffer named NAME, return nil.\n\
169 NAME may also be a buffer; if so, the value is that buffer.")
171 register Lisp_Object name
;
173 if (XTYPE (name
) == Lisp_Buffer
)
175 CHECK_STRING (name
, 0);
177 return Fcdr (Fassoc (name
, Vbuffer_alist
));
180 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
181 "Return the buffer visiting file FILENAME (a string).\n\
182 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
183 If there is no such live buffer, return nil.")
185 register Lisp_Object filename
;
187 register Lisp_Object tail
, buf
, tem
;
190 CHECK_STRING (filename
, 0);
191 filename
= Fexpand_file_name (filename
, Qnil
);
193 /* If the file name has special constructs in it,
194 call the corresponding file handler. */
195 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
197 return call2 (handler
, Qget_file_buffer
, filename
);
199 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
201 buf
= Fcdr (XCONS (tail
)->car
);
202 if (XTYPE (buf
) != Lisp_Buffer
) continue;
203 if (XTYPE (XBUFFER (buf
)->filename
) != Lisp_String
) continue;
204 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
211 /* Incremented for each buffer created, to assign the buffer number. */
214 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
215 "Return the buffer named NAME, or create such a buffer and return it.\n\
216 A new buffer is created if there is no live buffer named NAME.\n\
217 If NAME starts with a space, the new buffer does not keep undo information.\n\
218 If NAME is a buffer instead of a string, then it is the value returned.\n\
219 The value is never nil.")
221 register Lisp_Object name
;
223 register Lisp_Object buf
, function
, tem
;
224 int count
= specpdl_ptr
- specpdl
;
225 register struct buffer
*b
;
227 buf
= Fget_buffer (name
);
231 if (XSTRING (name
)->size
== 0)
232 error ("Empty string for buffer name is not allowed");
234 b
= (struct buffer
*) xmalloc (sizeof (struct buffer
));
236 BUF_GAP_SIZE (b
) = 20;
238 BUFFER_ALLOC (BUF_BEG_ADDR (b
), BUF_GAP_SIZE (b
));
240 if (! BUF_BEG_ADDR (b
))
250 /* Put this on the chain of all buffers including killed ones. */
251 b
->next
= all_buffers
;
254 b
->mark
= Fmake_marker ();
255 /*b->number = make_number (++buffer_count);*/
257 if (XSTRING (name
)->data
[0] != ' ')
264 /* Put this in the alist of all live buffers. */
265 XSET (buf
, Lisp_Buffer
, b
);
266 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
268 b
->mark
= Fmake_marker ();
272 function
= buffer_defaults
.major_mode
;
275 tem
= Fget (current_buffer
->major_mode
, Qmode_class
);
277 function
= current_buffer
->major_mode
;
280 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
283 /* To select a nonfundamental mode,
284 select the buffer temporarily and then call the mode function. */
286 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
291 return unbind_to (count
, buf
);
294 /* Reinitialize everything about a buffer except its name and contents. */
298 register struct buffer
*b
;
301 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
303 b
->save_modified
= 1;
304 XFASTINT (b
->save_length
) = 0;
305 b
->last_window_start
= 1;
307 b
->auto_save_modified
= 0;
308 b
->auto_save_failure_time
= -1;
309 b
->auto_save_file_name
= Qnil
;
311 b
->overlays_before
= Qnil
;
312 b
->overlays_after
= Qnil
;
313 XFASTINT (b
->overlay_center
) = 1;
314 b
->mark_active
= Qnil
;
316 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
317 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
319 reset_buffer_local_variables(b
);
322 reset_buffer_local_variables (b
)
323 register struct buffer
*b
;
327 /* Reset the major mode to Fundamental, together with all the
328 things that depend on the major mode.
329 default-major-mode is handled at a higher level.
330 We ignore it here. */
331 b
->major_mode
= Qfundamental_mode
;
333 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
334 b
->mode_name
= QSFundamental
;
335 b
->minor_modes
= Qnil
;
336 b
->downcase_table
= Vascii_downcase_table
;
337 b
->upcase_table
= Vascii_upcase_table
;
338 b
->case_canon_table
= Vascii_canon_table
;
339 b
->case_eqv_table
= Vascii_eqv_table
;
341 b
->sort_table
= XSTRING (Vascii_sort_table
);
342 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
345 /* Reset all per-buffer variables to their defaults. */
346 b
->local_var_alist
= Qnil
;
347 b
->local_var_flags
= 0;
349 /* For each slot that has a default value,
350 copy that into the slot. */
352 for (offset
= (char *)&buffer_local_flags
.name
- (char *)&buffer_local_flags
;
353 offset
< sizeof (struct buffer
);
354 offset
+= sizeof (Lisp_Object
)) /* sizeof int == sizeof Lisp_Object */
355 if (*(int *)(offset
+ (char *) &buffer_local_flags
) > 0
356 || *(int *)(offset
+ (char *) &buffer_local_flags
) == -2)
357 *(Lisp_Object
*)(offset
+ (char *)b
) =
358 *(Lisp_Object
*)(offset
+ (char *)&buffer_defaults
);
361 /* We split this away from generate-new-buffer, because rename-buffer
362 and set-visited-file-name ought to be able to use this to really
363 rename the buffer properly. */
365 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
367 "Return a string that is the name of no existing buffer based on NAME.\n\
368 If there is no live buffer named NAME, then return NAME.\n\
369 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
370 until an unused name is found, and then return that name.\n\
371 Optional second argument IGNORE specifies a name that is okay to use\n\
372 \(if it is in the sequence to be tried)\n\
373 even if a buffer with that name exists.")
375 register Lisp_Object name
, ignore
;
377 register Lisp_Object gentemp
, tem
;
381 CHECK_STRING (name
, 0);
383 tem
= Fget_buffer (name
);
390 sprintf (number
, "<%d>", ++count
);
391 gentemp
= concat2 (name
, build_string (number
));
392 tem
= Fstring_equal (gentemp
, ignore
);
395 tem
= Fget_buffer (gentemp
);
402 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
403 "Return the name of BUFFER, as a string.\n\
404 With no argument or nil as argument, return the name of the current buffer.")
406 register Lisp_Object buffer
;
409 return current_buffer
->name
;
410 CHECK_BUFFER (buffer
, 0);
411 return XBUFFER (buffer
)->name
;
414 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
415 "Return name of file BUFFER is visiting, or nil if none.\n\
416 No argument or nil as argument means use the current buffer.")
418 register Lisp_Object buffer
;
421 return current_buffer
->filename
;
422 CHECK_BUFFER (buffer
, 0);
423 return XBUFFER (buffer
)->filename
;
426 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
427 Sbuffer_local_variables
, 0, 1, 0,
428 "Return an alist of variables that are buffer-local in BUFFER.\n\
429 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
430 For a symbol that is locally unbound, just the symbol appears in the value.\n\
431 Note that storing new VALUEs in these elements doesn't change the variables.\n\
432 No argument or nil as argument means use current buffer as BUFFER.")
434 register Lisp_Object buffer
;
436 register struct buffer
*buf
;
437 register Lisp_Object result
;
440 buf
= current_buffer
;
443 CHECK_BUFFER (buffer
, 0);
444 buf
= XBUFFER (buffer
);
450 /* Reference each variable in the alist in our current buffer.
451 If inquiring about the current buffer, this gets the current values,
452 so store them into the alist so the alist is up to date.
453 If inquiring about some other buffer, this swaps out any values
454 for that buffer, making the alist up to date automatically. */
455 register Lisp_Object tail
;
456 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
458 Lisp_Object val
, elt
;
460 elt
= XCONS (tail
)->car
;
462 if (buf
== current_buffer
)
463 val
= find_symbol_value (XCONS (elt
)->car
);
465 val
= XCONS (elt
)->cdr
;
467 /* If symbol is unbound, put just the symbol in the list. */
468 if (EQ (val
, Qunbound
))
469 result
= Fcons (XCONS (elt
)->car
, result
);
470 /* Otherwise, put (symbol . value) in the list. */
472 result
= Fcons (Fcons (XCONS (elt
)->car
, val
), result
);
476 /* Add on all the variables stored in special slots. */
478 register int offset
, mask
;
480 for (offset
= (char *)&buffer_local_symbols
.name
- (char *)&buffer_local_symbols
;
481 offset
< sizeof (struct buffer
);
482 offset
+= (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
484 mask
= *(int *)(offset
+ (char *) &buffer_local_flags
);
485 if (mask
== -1 || (buf
->local_var_flags
& mask
))
486 if (XTYPE (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
488 result
= Fcons (Fcons (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
),
489 *(Lisp_Object
*)(offset
+ (char *)buf
)),
498 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
500 "Return t if BUFFER was modified since its file was last read or saved.\n\
501 No argument or nil as argument means use current buffer as BUFFER.")
503 register Lisp_Object buffer
;
505 register struct buffer
*buf
;
507 buf
= current_buffer
;
510 CHECK_BUFFER (buffer
, 0);
511 buf
= XBUFFER (buffer
);
514 return buf
->save_modified
< BUF_MODIFF (buf
) ? Qt
: Qnil
;
517 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
519 "Mark current buffer as modified or unmodified according to FLAG.\n\
520 A non-nil FLAG means mark the buffer modified.")
522 register Lisp_Object flag
;
524 register int already
;
525 register Lisp_Object fn
;
527 #ifdef CLASH_DETECTION
528 /* If buffer becoming modified, lock the file.
529 If buffer becoming unmodified, unlock the file. */
531 fn
= current_buffer
->filename
;
534 already
= current_buffer
->save_modified
< MODIFF
;
535 if (!already
&& !NILP (flag
))
537 else if (already
&& NILP (flag
))
540 #endif /* CLASH_DETECTION */
542 current_buffer
->save_modified
= NILP (flag
) ? MODIFF
: 0;
547 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
549 "Return BUFFER's tick counter, incremented for each change in text.\n\
550 Each buffer has a tick counter which is incremented each time the text in\n\
551 that buffer is changed. It wraps around occasionally.\n\
552 No argument or nil as argument means use current buffer as BUFFER.")
554 register Lisp_Object buffer
;
556 register struct buffer
*buf
;
558 buf
= current_buffer
;
561 CHECK_BUFFER (buffer
, 0);
562 buf
= XBUFFER (buffer
);
565 return make_number (BUF_MODIFF (buf
));
568 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
569 "sRename buffer (to new name): \nP",
570 "Change current buffer's name to NEWNAME (a string).\n\
571 If second arg UNIQUE is nil or omitted, it is an error if a\n\
572 buffer named NEWNAME already exists.\n\
573 If UNIQUE is non-nil, come up with a new name using\n\
574 `generate-new-buffer-name'.\n\
575 Interactively, you can set UNIQUE with a prefix argument.\n\
576 We return the name we actually gave the buffer.\n\
577 This does not change the name of the visited file (if any).")
579 register Lisp_Object name
, unique
;
581 register Lisp_Object tem
, buf
;
583 CHECK_STRING (name
, 0);
585 if (XSTRING (name
)->size
== 0)
586 error ("Empty string is invalid as a buffer name");
588 tem
= Fget_buffer (name
);
589 /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
590 the buffer automatically so you can create another with the original name.
591 It makes UNIQUE equivalent to
592 (rename-buffer (generate-new-buffer-name NAME)). */
593 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
594 return current_buffer
->name
;
598 name
= Fgenerate_new_buffer_name (name
, current_buffer
->name
);
600 error ("Buffer name \"%s\" is in use", XSTRING (name
)->data
);
603 current_buffer
->name
= name
;
605 /* Catch redisplay's attention. Unless we do this, the mode lines for
606 any windows displaying current_buffer will stay unchanged. */
609 XSET (buf
, Lisp_Buffer
, current_buffer
);
610 Fsetcar (Frassq (buf
, Vbuffer_alist
), name
);
611 if (NILP (current_buffer
->filename
) && !NILP (current_buffer
->auto_save_file_name
))
612 call0 (intern ("rename-auto-save-file"));
616 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 2, 0,
617 "Return most recently selected buffer other than BUFFER.\n\
618 Buffers not visible in windows are preferred to visible buffers,\n\
619 unless optional second argument VISIBLE-OK is non-nil.\n\
620 If no other buffer exists, the buffer `*scratch*' is returned.\n\
621 If BUFFER is omitted or nil, some interesting buffer is returned.")
623 register Lisp_Object buffer
, visible_ok
;
625 register Lisp_Object tail
, buf
, notsogood
, tem
;
628 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
630 buf
= Fcdr (Fcar (tail
));
631 if (EQ (buf
, buffer
))
633 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
635 if (NILP (visible_ok
))
636 tem
= Fget_buffer_window (buf
, Qt
);
641 if (NILP (notsogood
))
644 if (!NILP (notsogood
))
646 return Fget_buffer_create (build_string ("*scratch*"));
649 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
, 0, 1,
651 "Make BUFFER stop keeping undo information.\n\
652 No argument or nil as argument means do this for the current buffer.")
654 register Lisp_Object buffer
;
656 Lisp_Object real_buffer
;
659 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
662 real_buffer
= Fget_buffer (buffer
);
663 if (NILP (real_buffer
))
667 XBUFFER (real_buffer
)->undo_list
= Qt
;
672 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
674 "Start keeping undo information for buffer BUFFER.\n\
675 No argument or nil as argument means do this for the current buffer.")
677 register Lisp_Object buffer
;
679 Lisp_Object real_buffer
;
682 XSET (real_buffer
, Lisp_Buffer
, current_buffer
);
685 real_buffer
= Fget_buffer (buffer
);
686 if (NILP (real_buffer
))
690 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
691 XBUFFER (real_buffer
)->undo_list
= Qnil
;
697 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
698 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
699 The buffer being killed will be current while the hook is running.\n\
702 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
703 "Kill the buffer BUFFER.\n\
704 The argument may be a buffer or may be the name of a buffer.\n\
705 An argument of nil means kill the current buffer.\n\n\
706 Value is t if the buffer is actually killed, nil if user says no.\n\n\
707 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
708 if not void, is a list of functions to be called, with no arguments,\n\
709 before the buffer is actually killed. The buffer to be killed is current\n\
710 when the hook functions are called.\n\n\
711 Any processes that have this buffer as the `process-buffer' are killed\n\
712 with `delete-process'.")
717 register struct buffer
*b
;
718 register Lisp_Object tem
;
719 register struct Lisp_Marker
*m
;
720 struct gcpro gcpro1
, gcpro2
;
723 buf
= Fcurrent_buffer ();
725 buf
= Fget_buffer (bufname
);
731 /* Query if the buffer is still modified. */
732 if (INTERACTIVE
&& !NILP (b
->filename
)
733 && BUF_MODIFF (b
) > b
->save_modified
)
735 GCPRO2 (buf
, bufname
);
736 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
737 XSTRING (b
->name
)->data
));
743 /* Run hooks with the buffer to be killed the current buffer. */
745 register Lisp_Object val
;
746 int count
= specpdl_ptr
- specpdl
;
749 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
750 set_buffer_internal (b
);
752 /* First run the query functions; if any query is answered no,
753 don't kill the buffer. */
754 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
756 tem
= call0 (Fcar (list
));
758 return unbind_to (count
, Qnil
);
761 /* Then run the hooks. */
762 if (!NILP (Vrun_hooks
))
763 call1 (Vrun_hooks
, Qkill_buffer_hook
);
764 unbind_to (count
, Qnil
);
767 /* We have no more questions to ask. Verify that it is valid
768 to kill the buffer. This must be done after the questions
769 since anything can happen within do_yes_or_no_p. */
771 /* Don't kill the minibuffer now current. */
772 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
778 /* Make this buffer not be current.
779 In the process, notice if this is the sole visible buffer
780 and give up if so. */
781 if (b
== current_buffer
)
783 tem
= Fother_buffer (buf
, Qnil
);
785 if (b
== current_buffer
)
789 /* Now there is no question: we can kill the buffer. */
791 #ifdef CLASH_DETECTION
792 /* Unlock this buffer's file, if it is locked. */
794 #endif /* CLASH_DETECTION */
796 kill_buffer_processes (buf
);
800 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
801 Freplace_buffer_in_windows (buf
);
804 /* Delete any auto-save file. */
805 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
)
808 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
810 unlink (XSTRING (b
->auto_save_file_name
)->data
);
813 /* Unchain all markers of this buffer
814 and leave them pointing nowhere. */
815 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
824 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
825 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
826 /* Perhaps we should explicitly free the interval tree here... */
830 BUFFER_FREE (BUF_BEG_ADDR (b
));
837 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
838 we do this each time BUF is selected visibly, the more recently
839 selected buffers are always closer to the front of the list. This
840 means that other_buffer is more likely to choose a relevant buffer. */
845 register Lisp_Object link
, prev
;
848 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
850 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
855 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
856 we cannot use Fdelq itself here because it allows quitting. */
859 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
861 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
863 XCONS(link
)->cdr
= Vbuffer_alist
;
864 Vbuffer_alist
= link
;
867 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
868 "Select buffer BUFFER in the current window.\n\
869 BUFFER may be a buffer or a buffer name.\n\
870 Optional second arg NORECORD non-nil means\n\
871 do not put this buffer at the front of the list of recently selected ones.\n\
873 WARNING: This is NOT the way to work on another buffer temporarily\n\
874 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
875 the window-buffer correspondences.")
877 Lisp_Object bufname
, norecord
;
879 register Lisp_Object buf
;
882 if (EQ (minibuf_window
, selected_window
))
883 error ("Cannot switch buffers in minibuffer window");
884 tem
= Fwindow_dedicated_p (selected_window
);
886 error ("Cannot switch buffers in a dedicated window");
889 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
891 buf
= Fget_buffer_create (bufname
);
896 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
897 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
904 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
905 "Select buffer BUFFER in some window, preferably a different one.\n\
906 If BUFFER is nil, then some other buffer is chosen.\n\
907 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
908 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
909 window even if BUFFER is already visible in the selected window.")
911 Lisp_Object bufname
, other
;
913 register Lisp_Object buf
;
915 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
917 buf
= Fget_buffer_create (bufname
);
920 Fselect_window (Fdisplay_buffer (buf
, other
));
924 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
925 "Return the current buffer as a Lisp object.")
928 register Lisp_Object buf
;
929 XSET (buf
, Lisp_Buffer
, current_buffer
);
933 /* Set the current buffer to b */
936 set_buffer_internal (b
)
937 register struct buffer
*b
;
939 register struct buffer
*old_buf
;
940 register Lisp_Object tail
, valcontents
;
943 if (current_buffer
== b
)
946 windows_or_buffers_changed
= 1;
947 old_buf
= current_buffer
;
949 last_known_column_point
= -1; /* invalidate indentation cache */
951 /* Look down buffer's list of local Lisp variables
952 to find and update any that forward into C variables. */
954 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
956 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
957 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
958 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
959 && (tem
= XTYPE (XCONS (valcontents
)->car
),
960 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
961 || tem
== Lisp_Objfwd
)))
962 /* Just reference the variable
963 to cause it to become set for this buffer. */
964 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
967 /* Do the same with any others that were local to the previous buffer */
970 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
972 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
973 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
974 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
975 && (tem
= XTYPE (XCONS (valcontents
)->car
),
976 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
977 || tem
== Lisp_Objfwd
)))
978 /* Just reference the variable
979 to cause it to become set for this buffer. */
980 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
984 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
985 "Make the buffer BUFFER current for editing operations.\n\
986 BUFFER may be a buffer or the name of an existing buffer.\n\
987 See also `save-excursion' when you want to make a buffer current temporarily.\n\
988 This function does not display the buffer, so its effect ends\n\
989 when the current command terminates.\n\
990 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
992 register Lisp_Object bufname
;
994 register Lisp_Object buffer
;
995 buffer
= Fget_buffer (bufname
);
998 if (NILP (XBUFFER (buffer
)->name
))
999 error ("Selecting deleted buffer");
1000 set_buffer_internal (XBUFFER (buffer
));
1004 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1005 Sbarf_if_buffer_read_only
, 0, 0, 0,
1006 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1009 if (!NILP (current_buffer
->read_only
)
1010 && NILP (Vinhibit_read_only
))
1011 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1015 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1016 "Put BUFFER at the end of the list of all buffers.\n\
1017 There it is the least likely candidate for `other-buffer' to return;\n\
1018 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1019 If BUFFER is nil or omitted, bury the current buffer.\n\
1020 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1021 selected window if it is displayed there.")
1023 register Lisp_Object buf
;
1025 /* Figure out what buffer we're going to bury. */
1028 XSET (buf
, Lisp_Buffer
, current_buffer
);
1030 /* If we're burying the current buffer, unshow it. */
1031 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
1037 buf1
= Fget_buffer (buf
);
1043 /* Move buf to the end of the buffer list. */
1045 register Lisp_Object aelt
, link
;
1047 aelt
= Frassq (buf
, Vbuffer_alist
);
1048 link
= Fmemq (aelt
, Vbuffer_alist
);
1049 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1050 XCONS (link
)->cdr
= Qnil
;
1051 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1057 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1058 "Delete the entire contents of the current buffer.\n\
1059 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1060 so the buffer is truly empty after this.")
1065 current_buffer
->last_window_start
= 1;
1066 /* Prevent warnings, or suspension of auto saving, that would happen
1067 if future size is less than past size. Use of erase-buffer
1068 implies that the future text is not really related to the past text. */
1069 XFASTINT (current_buffer
->save_length
) = 0;
1073 validate_region (b
, e
)
1074 register Lisp_Object
*b
, *e
;
1078 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1079 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1081 if (XINT (*b
) > XINT (*e
))
1083 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1085 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1088 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1089 && XINT (*e
) <= ZV
))
1090 args_out_of_range (*b
, *e
);
1094 list_buffers_1 (files
)
1097 register Lisp_Object tail
, tem
, buf
;
1098 Lisp_Object col1
, col2
, col3
, minspace
;
1099 register struct buffer
*old
= current_buffer
, *b
;
1100 Lisp_Object desired_point
;
1101 Lisp_Object other_file_symbol
;
1103 desired_point
= Qnil
;
1104 other_file_symbol
= intern ("list-buffers-directory");
1106 XFASTINT (col1
) = 19;
1107 XFASTINT (col2
) = 25;
1108 XFASTINT (col3
) = 40;
1109 XFASTINT (minspace
) = 1;
1111 Fset_buffer (Vstandard_output
);
1112 Fbuffer_disable_undo (Vstandard_output
);
1113 current_buffer
->read_only
= Qnil
;
1116 MR Buffer Size Mode File\n\
1117 -- ------ ---- ---- ----\n", -1);
1119 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1121 buf
= Fcdr (Fcar (tail
));
1123 /* Don't mention the minibuffers. */
1124 if (XSTRING (b
->name
)->data
[0] == ' ')
1126 /* Optionally don't mention buffers that lack files. */
1127 if (!NILP (files
) && NILP (b
->filename
))
1129 /* Identify the current buffer. */
1131 XFASTINT (desired_point
) = point
;
1132 write_string (b
== old
? "." : " ", -1);
1133 /* Identify modified buffers */
1134 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1135 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1136 Fprinc (b
->name
, Qnil
);
1137 Findent_to (col1
, make_number (2));
1138 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1140 Findent_to (col2
, minspace
);
1141 Fprinc (b
->mode_name
, Qnil
);
1142 Findent_to (col3
, minspace
);
1144 if (!NILP (b
->filename
))
1145 Fprinc (b
->filename
, Qnil
);
1148 /* No visited file; check local value of list-buffers-directory. */
1150 set_buffer_internal (b
);
1151 tem
= Fboundp (other_file_symbol
);
1154 tem
= Fsymbol_value (other_file_symbol
);
1155 Fset_buffer (Vstandard_output
);
1156 if (XTYPE (tem
) == Lisp_String
)
1160 Fset_buffer (Vstandard_output
);
1162 write_string ("\n", -1);
1165 tail
= intern ("Buffer-menu-mode");
1166 if ((tem
= Ffboundp (tail
), !NILP (tem
)))
1168 set_buffer_internal (old
);
1169 return desired_point
;
1172 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1173 "Display a list of names of existing buffers.\n\
1174 The list is displayed in a buffer named `*Buffer List*'.\n\
1175 Note that buffers with names starting with spaces are omitted.\n\
1176 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1178 The M column contains a * for buffers that are modified.\n\
1179 The R column contains a % for buffers that are read-only.")
1183 Lisp_Object desired_point
;
1186 = internal_with_output_to_temp_buffer ("*Buffer List*",
1187 list_buffers_1
, files
);
1189 if (NUMBERP (desired_point
))
1191 int count
= specpdl_ptr
- specpdl
;
1192 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
1193 Fset_buffer (build_string ("*Buffer List*"));
1194 SET_PT (XINT (desired_point
));
1195 return unbind_to (count
, Qnil
);
1200 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1202 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1203 Most local variable bindings are eliminated so that the default values\n\
1204 become effective once more. Also, the syntax table is set from\n\
1205 `standard-syntax-table', the local keymap is set to nil,\n\
1206 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1207 This function also forces redisplay of the mode line.\n\
1209 Every function to select a new major mode starts by\n\
1210 calling this function.\n\n\
1211 As a special exception, local variables whose names have\n\
1212 a non-nil `permanent-local' property are not eliminated by this function.\n\
1214 The first thing this function does is run\n\
1215 the normal hook `change-major-mode-hook'.")
1218 register Lisp_Object alist
, sym
, tem
;
1221 if (!NILP (Vrun_hooks
))
1222 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1223 oalist
= current_buffer
->local_var_alist
;
1225 /* Make sure no local variables remain set up with this buffer
1226 for their current values. */
1228 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1230 sym
= XCONS (XCONS (alist
)->car
)->car
;
1232 /* Need not do anything if some other buffer's binding is now encached. */
1233 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1234 if (XBUFFER (tem
) == current_buffer
)
1236 /* Symbol is set up for this buffer's old local value.
1237 Set it up for the current buffer with the default value. */
1239 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1240 /* Store the symbol's current value into the alist entry
1241 it is currently set up for. This is so that, if the
1242 local is marked permanent, and we make it local again below,
1243 we don't lose the value. */
1244 XCONS (XCONS (tem
)->car
)->cdr
1245 = do_symval_forwarding (XCONS (XSYMBOL (sym
)->value
)->car
);
1246 /* Switch to the symbol's default-value alist entry. */
1247 XCONS (tem
)->car
= tem
;
1248 /* Mark it as current for the current buffer. */
1249 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1250 /* Store the current value into any forwarding in the symbol. */
1251 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1256 /* Actually eliminate all local bindings of this buffer. */
1258 reset_buffer_local_variables (current_buffer
);
1260 /* Redisplay mode lines; we are changing major mode. */
1262 update_mode_lines
++;
1264 /* Any which are supposed to be permanent,
1265 make local again, with the same values they had. */
1267 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1269 sym
= XCONS (XCONS (alist
)->car
)->car
;
1270 tem
= Fget (sym
, Qpermanent_local
);
1273 Fmake_local_variable (sym
);
1274 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1278 /* Force mode-line redisplay. Useful here because all major mode
1279 commands call this function. */
1280 update_mode_lines
++;
1285 /* Find all the overlays in the current buffer that contain position POS.
1286 Return the number found, and store them in a vector in *VEC_PTR.
1287 Store in *LEN_PTR the size allocated for the vector.
1288 Store in *NEXT_PTR the next position after POS where an overlay starts,
1289 or ZV if there are no more overlays.
1291 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1292 when this function is called.
1294 If EXTEND is non-zero, we make the vector bigger if necessary.
1295 If EXTEND is zero, we never extend the vector,
1296 and we store only as many overlays as will fit.
1297 But we still return the total number of overlays. */
1300 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
)
1303 Lisp_Object
**vec_ptr
;
1307 Lisp_Object tail
, overlay
, start
, end
, result
;
1310 Lisp_Object
*vec
= *vec_ptr
;
1312 int inhibit_storing
= 0;
1314 for (tail
= current_buffer
->overlays_before
;
1315 XGCTYPE (tail
) == Lisp_Cons
;
1316 tail
= XCONS (tail
)->cdr
)
1320 overlay
= XCONS (tail
)->car
;
1321 if (XGCTYPE (overlay
) != Lisp_Overlay
)
1324 start
= OVERLAY_START (overlay
);
1325 end
= OVERLAY_END (overlay
);
1326 if (OVERLAY_POSITION (end
) <= pos
)
1328 startpos
= OVERLAY_POSITION (start
);
1329 if (startpos
<= pos
)
1333 /* The supplied vector is full.
1334 Either make it bigger, or don't store any more in it. */
1337 *len_ptr
= len
*= 2;
1338 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1342 inhibit_storing
= 1;
1345 if (!inhibit_storing
)
1347 /* Keep counting overlays even if we can't return them all. */
1350 else if (startpos
< next
)
1354 for (tail
= current_buffer
->overlays_after
;
1355 XGCTYPE (tail
) == Lisp_Cons
;
1356 tail
= XCONS (tail
)->cdr
)
1360 overlay
= XCONS (tail
)->car
;
1361 if (XGCTYPE (overlay
) != Lisp_Overlay
)
1364 start
= OVERLAY_START (overlay
);
1365 end
= OVERLAY_END (overlay
);
1366 startpos
= OVERLAY_POSITION (start
);
1369 if (startpos
< next
)
1373 if (pos
< OVERLAY_POSITION (end
))
1379 *len_ptr
= len
*= 2;
1380 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1384 inhibit_storing
= 1;
1387 if (!inhibit_storing
)
1399 Lisp_Object overlay
;
1405 compare_overlays (s1
, s2
)
1406 struct sortvec
*s1
, *s2
;
1408 if (s1
->priority
!= s2
->priority
)
1409 return s1
->priority
- s2
->priority
;
1410 if (s1
->beg
!= s2
->beg
)
1411 return s1
->beg
- s2
->beg
;
1412 if (s1
->end
!= s2
->end
)
1413 return s2
->end
- s1
->end
;
1417 /* Sort an array of overlays by priority. The array is modified in place.
1418 The return value is the new size; this may be smaller than the original
1419 size if some of the overlays were invalid or were window-specific. */
1421 sort_overlays (overlay_vec
, noverlays
, w
)
1422 Lisp_Object
*overlay_vec
;
1427 struct sortvec
*sortvec
;
1428 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1430 /* Put the valid and relevant overlays into sortvec. */
1432 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1435 Lisp_Object overlay
;
1437 overlay
= overlay_vec
[i
];
1438 if (OVERLAY_VALID (overlay
)
1439 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1440 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1442 /* If we're interested in a specific window, then ignore
1443 overlays that are limited to some other window. */
1448 window
= Foverlay_get (overlay
, Qwindow
);
1449 if (XTYPE (window
) == Lisp_Window
&& XWINDOW (window
) != w
)
1453 /* This overlay is good and counts: put it into sortvec. */
1454 sortvec
[j
].overlay
= overlay
;
1455 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1456 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1457 tem
= Foverlay_get (overlay
, Qpriority
);
1459 sortvec
[j
].priority
= XINT (tem
);
1461 sortvec
[j
].priority
= 0;
1467 /* Sort the overlays into the proper order: increasing priority. */
1470 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1472 for (i
= 0; i
< noverlays
; i
++)
1473 overlay_vec
[i
] = sortvec
[i
].overlay
;
1477 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1480 recenter_overlay_lists (buf
, pos
)
1484 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1486 /* See if anything in overlays_before should move to overlays_after. */
1488 /* We don't strictly need prev in this loop; it should always be nil.
1489 But we use it for symmetry and in case that should cease to be true
1490 with some future change. */
1492 for (tail
= buf
->overlays_before
;
1494 prev
= tail
, tail
= next
)
1496 next
= XCONS (tail
)->cdr
;
1497 overlay
= XCONS (tail
)->car
;
1499 /* If the overlay is not valid, get rid of it. */
1500 if (!OVERLAY_VALID (overlay
))
1505 /* Splice the cons cell TAIL out of overlays_before. */
1507 XCONS (prev
)->cdr
= next
;
1509 buf
->overlays_before
= next
;
1515 beg
= OVERLAY_START (overlay
);
1516 end
= OVERLAY_END (overlay
);
1518 if (OVERLAY_POSITION (end
) > pos
)
1520 /* OVERLAY needs to be moved. */
1521 int where
= OVERLAY_POSITION (beg
);
1522 Lisp_Object other
, other_prev
;
1524 /* Splice the cons cell TAIL out of overlays_before. */
1526 XCONS (prev
)->cdr
= next
;
1528 buf
->overlays_before
= next
;
1530 /* Search thru overlays_after for where to put it. */
1532 for (other
= buf
->overlays_after
;
1534 other_prev
= other
, other
= XCONS (other
)->cdr
)
1536 Lisp_Object otherbeg
, otheroverlay
, follower
;
1539 otheroverlay
= XCONS (other
)->car
;
1540 if (! OVERLAY_VALID (otheroverlay
))
1543 otherbeg
= OVERLAY_START (otheroverlay
);
1544 if (OVERLAY_POSITION (otherbeg
) >= where
)
1548 /* Add TAIL to overlays_after before OTHER. */
1549 XCONS (tail
)->cdr
= other
;
1550 if (!NILP (other_prev
))
1551 XCONS (other_prev
)->cdr
= tail
;
1553 buf
->overlays_after
= tail
;
1557 /* We've reached the things that should stay in overlays_before.
1558 All the rest of overlays_before must end even earlier,
1563 /* See if anything in overlays_after should be in overlays_before. */
1565 for (tail
= buf
->overlays_after
;
1567 prev
= tail
, tail
= next
)
1569 next
= XCONS (tail
)->cdr
;
1570 overlay
= XCONS (tail
)->car
;
1572 /* If the overlay is not valid, get rid of it. */
1573 if (!OVERLAY_VALID (overlay
))
1578 /* Splice the cons cell TAIL out of overlays_after. */
1580 XCONS (prev
)->cdr
= next
;
1582 buf
->overlays_after
= next
;
1588 beg
= OVERLAY_START (overlay
);
1589 end
= OVERLAY_END (overlay
);
1591 /* Stop looking, when we know that nothing further
1592 can possibly end before POS. */
1593 if (OVERLAY_POSITION (beg
) > pos
)
1596 if (OVERLAY_POSITION (end
) <= pos
)
1598 /* OVERLAY needs to be moved. */
1599 int where
= OVERLAY_POSITION (end
);
1600 Lisp_Object other
, other_prev
;
1602 /* Splice the cons cell TAIL out of overlays_after. */
1604 XCONS (prev
)->cdr
= next
;
1606 buf
->overlays_after
= next
;
1608 /* Search thru overlays_before for where to put it. */
1610 for (other
= buf
->overlays_before
;
1612 other_prev
= other
, other
= XCONS (other
)->cdr
)
1614 Lisp_Object otherend
, otheroverlay
;
1617 otheroverlay
= XCONS (other
)->car
;
1618 if (! OVERLAY_VALID (otheroverlay
))
1621 otherend
= OVERLAY_END (otheroverlay
);
1622 if (OVERLAY_POSITION (otherend
) <= where
)
1626 /* Add TAIL to overlays_before before OTHER. */
1627 XCONS (tail
)->cdr
= other
;
1628 if (!NILP (other_prev
))
1629 XCONS (other_prev
)->cdr
= tail
;
1631 buf
->overlays_before
= tail
;
1636 XFASTINT (buf
->overlay_center
) = pos
;
1639 /* Fix up overlays that were garbled as a result of permuting markers
1640 in the range START through END. Any overlay with at least one
1641 endpoint in this range will need to be unlinked from the overlay
1642 list and reinserted in its proper place.
1643 Such an overlay might even have negative size at this point.
1644 If so, we'll reverse the endpoints. Can you think of anything
1645 better to do in this situation? */
1647 fix_overlays_in_range (start
, end
)
1648 register int start
, end
;
1650 Lisp_Object tem
, overlay
;
1651 Lisp_Object before_list
, after_list
;
1652 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
1653 int startpos
, endpos
;
1655 /* This algorithm shifts links around instead of consing and GCing.
1656 The loop invariant is that before_list (resp. after_list) is a
1657 well-formed list except that its last element, the one that
1658 *pbefore (resp. *pafter) points to, is still uninitialized.
1659 So it's not a bug that before_list isn't initialized, although
1660 it may look strange. */
1661 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
1663 overlay
= XCONS (*ptail
)->car
;
1664 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1667 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1669 || (startpos
>= start
&& startpos
< end
))
1671 /* If the overlay is backwards, fix that now. */
1672 if (startpos
> endpos
)
1675 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
1676 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
1677 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
1679 /* Add it to the end of the wrong list. Later on,
1680 recenter_overlay_lists will move it to the right place. */
1681 if (endpos
< XINT (current_buffer
->overlay_center
))
1684 pafter
= &XCONS (*ptail
)->cdr
;
1689 pbefore
= &XCONS (*ptail
)->cdr
;
1691 *ptail
= XCONS (*ptail
)->cdr
;
1694 ptail
= &XCONS (*ptail
)->cdr
;
1696 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
1698 overlay
= XCONS (*ptail
)->car
;
1699 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1700 if (startpos
>= end
)
1702 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1703 if (startpos
>= start
1704 || (endpos
>= start
&& endpos
< end
))
1706 if (startpos
> endpos
)
1709 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
1710 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
1711 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
1713 if (endpos
< XINT (current_buffer
->overlay_center
))
1716 pafter
= &XCONS (*ptail
)->cdr
;
1721 pbefore
= &XCONS (*ptail
)->cdr
;
1723 *ptail
= XCONS (*ptail
)->cdr
;
1726 ptail
= &XCONS (*ptail
)->cdr
;
1729 /* Splice the constructed (wrong) lists into the buffer's lists,
1730 and let the recenter function make it sane again. */
1731 *pbefore
= current_buffer
->overlays_before
;
1732 current_buffer
->overlays_before
= before_list
;
1733 recenter_overlay_lists (current_buffer
,
1734 XINT (current_buffer
->overlay_center
));
1736 *pafter
= current_buffer
->overlays_after
;
1737 current_buffer
->overlays_after
= after_list
;
1738 recenter_overlay_lists (current_buffer
,
1739 XINT (current_buffer
->overlay_center
));
1742 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1743 "Return t if OBJECT is an overlay.")
1747 return (OVERLAYP (object
) ? Qt
: Qnil
);
1750 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1751 "Create a new overlay with range BEG to END in BUFFER.\n\
1752 If omitted, BUFFER defaults to the current buffer.\n\
1753 BEG and END may be integers or markers.")
1755 Lisp_Object beg
, end
, buffer
;
1757 Lisp_Object overlay
;
1761 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1763 CHECK_BUFFER (buffer
, 2);
1765 && ! EQ (Fmarker_buffer (beg
), buffer
))
1766 error ("Marker points into wrong buffer");
1768 && ! EQ (Fmarker_buffer (end
), buffer
))
1769 error ("Marker points into wrong buffer");
1771 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1772 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1774 if (XINT (beg
) > XINT (end
))
1777 temp
= beg
; beg
= end
; end
= temp
;
1780 b
= XBUFFER (buffer
);
1782 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1783 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1785 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1786 XSETTYPE (overlay
, Lisp_Overlay
);
1788 /* Put the new overlay on the wrong list. */
1789 end
= OVERLAY_END (overlay
);
1790 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1791 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1793 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1795 /* This puts it in the right list, and in the right order. */
1796 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1798 /* We don't need to redisplay the region covered by the overlay, because
1799 the overlay has no properties at the moment. */
1804 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1805 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1806 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1807 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1809 (overlay
, beg
, end
, buffer
)
1810 Lisp_Object overlay
, beg
, end
, buffer
;
1812 struct buffer
*b
, *ob
;
1813 Lisp_Object obuffer
;
1814 int count
= specpdl_ptr
- specpdl
;
1816 CHECK_OVERLAY (overlay
, 0);
1818 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1820 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1821 CHECK_BUFFER (buffer
, 3);
1824 && ! EQ (Fmarker_buffer (beg
), buffer
))
1825 error ("Marker points into wrong buffer");
1827 && ! EQ (Fmarker_buffer (end
), buffer
))
1828 error ("Marker points into wrong buffer");
1830 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1831 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1833 specbind (Qinhibit_quit
, Qt
);
1835 if (XINT (beg
) > XINT (end
))
1838 temp
= beg
; beg
= end
; end
= temp
;
1841 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1842 b
= XBUFFER (buffer
);
1843 ob
= XBUFFER (obuffer
);
1845 /* If the overlay has changed buffers, do a thorough redisplay. */
1846 if (!EQ (buffer
, obuffer
))
1848 /* Redisplay where the overlay was. */
1849 if (!NILP (obuffer
))
1854 o_beg
= OVERLAY_START (overlay
);
1855 o_end
= OVERLAY_END (overlay
);
1856 o_beg
= OVERLAY_POSITION (o_beg
);
1857 o_end
= OVERLAY_POSITION (o_end
);
1859 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1862 /* Redisplay where the overlay is going to be. */
1863 redisplay_region (ob
, beg
, end
);
1865 /* Don't limit redisplay to the selected window. */
1866 windows_or_buffers_changed
= 1;
1869 /* Redisplay the area the overlay has just left, or just enclosed. */
1873 int change_beg
, change_end
;
1875 o_beg
= OVERLAY_START (overlay
);
1876 o_end
= OVERLAY_END (overlay
);
1877 o_beg
= OVERLAY_POSITION (o_beg
);
1878 o_end
= OVERLAY_POSITION (o_end
);
1880 if (XINT (o_beg
) == XINT (beg
))
1881 redisplay_region (b
, XINT (o_end
), XINT (end
));
1882 else if (XINT (o_end
) == XINT (end
))
1883 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1886 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1887 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1888 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1892 if (!NILP (obuffer
))
1894 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
1895 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
1898 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1899 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1901 /* Put the overlay on the wrong list. */
1902 end
= OVERLAY_END (overlay
);
1903 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1904 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1906 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1908 /* This puts it in the right list, and in the right order. */
1909 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1911 return unbind_to (count
, overlay
);
1914 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1915 "Delete the overlay OVERLAY from its buffer.")
1917 Lisp_Object overlay
;
1921 int count
= specpdl_ptr
- specpdl
;
1923 CHECK_OVERLAY (overlay
, 0);
1925 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1929 b
= XBUFFER (buffer
);
1931 specbind (Qinhibit_quit
, Qt
);
1933 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1934 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1936 redisplay_region (b
,
1937 marker_position (OVERLAY_START (overlay
)),
1938 marker_position (OVERLAY_END (overlay
)));
1940 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1941 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1943 return unbind_to (count
, Qnil
);
1946 /* Overlay dissection functions. */
1948 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1949 "Return the position at which OVERLAY starts.")
1951 Lisp_Object overlay
;
1953 CHECK_OVERLAY (overlay
, 0);
1955 return (Fmarker_position (OVERLAY_START (overlay
)));
1958 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1959 "Return the position at which OVERLAY ends.")
1961 Lisp_Object overlay
;
1963 CHECK_OVERLAY (overlay
, 0);
1965 return (Fmarker_position (OVERLAY_END (overlay
)));
1968 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1969 "Return the buffer OVERLAY belongs to.")
1971 Lisp_Object overlay
;
1973 CHECK_OVERLAY (overlay
, 0);
1975 return Fmarker_buffer (OVERLAY_START (overlay
));
1978 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
1979 "Return a list of the properties on OVERLAY.\n\
1980 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
1983 Lisp_Object overlay
;
1985 CHECK_OVERLAY (overlay
, 0);
1987 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
1991 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1992 "Return a list of the overlays that contain position POS.")
1998 Lisp_Object
*overlay_vec
;
2002 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2005 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2007 /* Put all the overlays we want in a vector in overlay_vec.
2008 Store the length in len. */
2009 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
2011 /* Make a list of them all. */
2012 result
= Flist (noverlays
, overlay_vec
);
2014 xfree (overlay_vec
);
2018 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
2020 "Return the next position after POS where an overlay starts or ends.\n\
2021 If there are no more overlay boundaries after POS, return (point-max).")
2027 Lisp_Object
*overlay_vec
;
2032 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2035 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2037 /* Put all the overlays we want in a vector in overlay_vec.
2038 Store the length in len.
2039 endpos gets the position where the next overlay starts. */
2040 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
2042 /* If any of these overlays ends before endpos,
2043 use its ending point instead. */
2044 for (i
= 0; i
< noverlays
; i
++)
2049 oend
= OVERLAY_END (overlay_vec
[i
]);
2050 oendpos
= OVERLAY_POSITION (oend
);
2051 if (oendpos
< endpos
)
2055 xfree (overlay_vec
);
2056 return make_number (endpos
);
2059 /* These functions are for debugging overlays. */
2061 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
2062 "Return a pair of lists giving all the overlays of the current buffer.\n\
2063 The car has all the overlays before the overlay center;\n\
2064 the cdr has all the overlays after the overlay center.\n\
2065 Recentering overlays moves overlays between these lists.\n\
2066 The lists you get are copies, so that changing them has no effect.\n\
2067 However, the overlays you get are the real objects that the buffer uses.")
2070 Lisp_Object before
, after
;
2071 before
= current_buffer
->overlays_before
;
2073 before
= Fcopy_sequence (before
);
2074 after
= current_buffer
->overlays_after
;
2076 after
= Fcopy_sequence (after
);
2078 return Fcons (before
, after
);
2081 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
2082 "Recenter the overlays of the current buffer around position POS.")
2086 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2088 recenter_overlay_lists (current_buffer
, XINT (pos
));
2092 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
2093 "Get the property of overlay OVERLAY with property name NAME.")
2095 Lisp_Object overlay
, prop
;
2099 CHECK_OVERLAY (overlay
, 0);
2101 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
2102 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
2103 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
2105 if (EQ (XCONS (plist
)->car
, prop
))
2106 return XCONS (XCONS (plist
)->cdr
)->car
;
2112 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
2113 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
2114 (overlay
, prop
, value
)
2115 Lisp_Object overlay
, prop
, value
;
2117 Lisp_Object plist
, tail
;
2119 CHECK_OVERLAY (overlay
, 0);
2121 tail
= Fmarker_buffer (OVERLAY_START (overlay
));
2123 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
2124 marker_position (OVERLAY_START (overlay
)),
2125 marker_position (OVERLAY_END (overlay
)));
2127 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
2130 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
2131 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
2133 if (EQ (XCONS (tail
)->car
, prop
))
2134 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
2137 if (! CONSP (XCONS (overlay
)->cdr
))
2138 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
2140 XCONS (XCONS (overlay
)->cdr
)->cdr
2141 = Fcons (prop
, Fcons (value
, plist
));
2146 /* Run the modification-hooks of overlays that include
2147 any part of the text in START to END.
2148 Run the insert-before-hooks of overlay starting at END,
2149 and the insert-after-hooks of overlay ending at START. */
2152 verify_overlay_modification (start
, end
)
2153 Lisp_Object start
, end
;
2155 Lisp_Object prop
, overlay
, tail
;
2156 int insertion
= EQ (start
, end
);
2158 struct gcpro gcpro1
, gcpro2
;
2162 GCPRO2 (overlay
, tail
);
2165 for (tail
= current_buffer
->overlays_before
;
2167 tail
= XCONS (tail
)->cdr
)
2169 int startpos
, endpos
;
2170 Lisp_Object ostart
, oend
;
2172 overlay
= XCONS (tail
)->car
;
2174 ostart
= OVERLAY_START (overlay
);
2175 oend
= OVERLAY_END (overlay
);
2176 endpos
= OVERLAY_POSITION (oend
);
2177 if (XFASTINT (start
) > endpos
)
2179 startpos
= OVERLAY_POSITION (ostart
);
2180 if (XFASTINT (end
) == startpos
&& insertion
)
2182 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2185 /* Copy TAIL in case the hook recenters the overlay lists. */
2187 tail
= Fcopy_sequence (tail
);
2189 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2192 if (XFASTINT (start
) == endpos
&& insertion
)
2194 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2198 tail
= Fcopy_sequence (tail
);
2200 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2203 /* Test for intersecting intervals. This does the right thing
2204 for both insertion and deletion. */
2205 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2207 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2211 tail
= Fcopy_sequence (tail
);
2213 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2219 for (tail
= current_buffer
->overlays_after
;
2221 tail
= XCONS (tail
)->cdr
)
2223 int startpos
, endpos
;
2224 Lisp_Object ostart
, oend
;
2226 overlay
= XCONS (tail
)->car
;
2228 ostart
= OVERLAY_START (overlay
);
2229 oend
= OVERLAY_END (overlay
);
2230 startpos
= OVERLAY_POSITION (ostart
);
2231 endpos
= OVERLAY_POSITION (oend
);
2232 if (XFASTINT (end
) < startpos
)
2234 if (XFASTINT (end
) == startpos
&& insertion
)
2236 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2240 tail
= Fcopy_sequence (tail
);
2242 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2245 if (XFASTINT (start
) == endpos
&& insertion
)
2247 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2251 tail
= Fcopy_sequence (tail
);
2253 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2256 /* Test for intersecting intervals. This does the right thing
2257 for both insertion and deletion. */
2258 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2260 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2264 tail
= Fcopy_sequence (tail
);
2266 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2275 call_overlay_mod_hooks (list
, overlay
, start
, end
)
2276 Lisp_Object list
, overlay
, start
, end
;
2278 struct gcpro gcpro1
;
2280 while (!NILP (list
))
2282 call3 (Fcar (list
), overlay
, start
, end
);
2288 /* Somebody has tried to store NEWVAL into the buffer-local slot with
2289 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
2291 buffer_slot_type_mismatch (valcontents
, newval
)
2292 Lisp_Object valcontents
, newval
;
2294 unsigned int offset
= XUINT (valcontents
);
2295 unsigned char *symbol_name
=
2296 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
2300 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
2302 case Lisp_Int
: type_name
= "integers"; break;
2303 case Lisp_String
: type_name
= "strings"; break;
2304 case Lisp_Marker
: type_name
= "markers"; break;
2305 case Lisp_Symbol
: type_name
= "symbols"; break;
2306 case Lisp_Cons
: type_name
= "lists"; break;
2307 case Lisp_Vector
: type_name
= "vectors"; break;
2312 error ("only %s should be stored in the buffer-local variable %s",
2313 type_name
, symbol_name
);
2318 register Lisp_Object tem
;
2320 /* Make sure all markable slots in buffer_defaults
2321 are initialized reasonably, so mark_buffer won't choke. */
2322 reset_buffer (&buffer_defaults
);
2323 reset_buffer (&buffer_local_symbols
);
2324 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
2325 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
2327 /* Set up the default values of various buffer slots. */
2328 /* Must do these before making the first buffer! */
2330 /* real setup is done in loaddefs.el */
2331 buffer_defaults
.mode_line_format
= build_string ("%-");
2332 buffer_defaults
.abbrev_mode
= Qnil
;
2333 buffer_defaults
.overwrite_mode
= Qnil
;
2334 buffer_defaults
.case_fold_search
= Qt
;
2335 buffer_defaults
.auto_fill_function
= Qnil
;
2336 buffer_defaults
.selective_display
= Qnil
;
2338 buffer_defaults
.selective_display_ellipses
= Qt
;
2340 buffer_defaults
.abbrev_table
= Qnil
;
2341 buffer_defaults
.display_table
= Qnil
;
2342 buffer_defaults
.undo_list
= Qnil
;
2343 buffer_defaults
.mark_active
= Qnil
;
2344 buffer_defaults
.overlays_before
= Qnil
;
2345 buffer_defaults
.overlays_after
= Qnil
;
2346 XFASTINT (buffer_defaults
.overlay_center
) = 1;
2348 XFASTINT (buffer_defaults
.tab_width
) = 8;
2349 buffer_defaults
.truncate_lines
= Qnil
;
2350 buffer_defaults
.ctl_arrow
= Qt
;
2353 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
2355 XFASTINT (buffer_defaults
.fill_column
) = 70;
2356 XFASTINT (buffer_defaults
.left_margin
) = 0;
2358 /* Assign the local-flags to the slots that have default values.
2359 The local flag is a bit that is used in the buffer
2360 to say that it has its own local value for the slot.
2361 The local flag bits are in the local_var_flags slot of the buffer. */
2363 /* Nothing can work if this isn't true */
2364 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
2366 /* 0 means not a lisp var, -1 means always local, else mask */
2367 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
2368 XFASTINT (buffer_local_flags
.filename
) = -1;
2369 XFASTINT (buffer_local_flags
.directory
) = -1;
2370 XFASTINT (buffer_local_flags
.backed_up
) = -1;
2371 XFASTINT (buffer_local_flags
.save_length
) = -1;
2372 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
2373 XFASTINT (buffer_local_flags
.read_only
) = -1;
2374 XFASTINT (buffer_local_flags
.major_mode
) = -1;
2375 XFASTINT (buffer_local_flags
.mode_name
) = -1;
2376 XFASTINT (buffer_local_flags
.undo_list
) = -1;
2377 XFASTINT (buffer_local_flags
.mark_active
) = -1;
2379 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
2380 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
2381 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
2382 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
2383 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
2384 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
2386 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
2388 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
2389 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
2390 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
2391 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
2392 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
2393 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
2394 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
2395 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
2397 XFASTINT (buffer_local_flags
.buffer_file_type
) = 0x4000;
2400 Vbuffer_alist
= Qnil
;
2404 QSFundamental
= build_string ("Fundamental");
2406 Qfundamental_mode
= intern ("fundamental-mode");
2407 buffer_defaults
.major_mode
= Qfundamental_mode
;
2409 Qmode_class
= intern ("mode-class");
2411 Qprotected_field
= intern ("protected-field");
2413 Qpermanent_local
= intern ("permanent-local");
2415 Qkill_buffer_hook
= intern ("kill-buffer-hook");
2417 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
2418 /* super-magic invisible buffer */
2419 Vbuffer_alist
= Qnil
;
2421 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2426 char buf
[MAXPATHLEN
+1];
2428 struct stat dotstat
, pwdstat
;
2431 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2433 /* If PWD is accurate, use it instead of calling getwd. This is faster
2434 when PWD is right, and may avoid a fatal error. */
2435 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
2436 && stat (pwd
, &pwdstat
) == 0
2437 && stat (".", &dotstat
) == 0
2438 && dotstat
.st_ino
== pwdstat
.st_ino
2439 && dotstat
.st_dev
== pwdstat
.st_dev
2440 && strlen (pwd
) < MAXPATHLEN
)
2442 else if (getwd (buf
) == 0)
2443 fatal ("`getwd' failed: %s.\n", buf
);
2446 /* Maybe this should really use some standard subroutine
2447 whose definition is filename syntax dependent. */
2448 if (buf
[strlen (buf
) - 1] != '/')
2450 #endif /* not VMS */
2451 current_buffer
->directory
= build_string (buf
);
2453 temp
= get_minibuffer (0);
2454 XBUFFER (temp
)->directory
= current_buffer
->directory
;
2457 /* initialize the buffer routines */
2460 extern Lisp_Object Qdisabled
;
2462 staticpro (&Vbuffer_defaults
);
2463 staticpro (&Vbuffer_local_symbols
);
2464 staticpro (&Qfundamental_mode
);
2465 staticpro (&Qmode_class
);
2466 staticpro (&QSFundamental
);
2467 staticpro (&Vbuffer_alist
);
2468 staticpro (&Qprotected_field
);
2469 staticpro (&Qpermanent_local
);
2470 staticpro (&Qkill_buffer_hook
);
2471 staticpro (&Qoverlayp
);
2472 staticpro (&Qmodification_hooks
);
2473 Qmodification_hooks
= intern ("modification-hooks");
2474 staticpro (&Qinsert_in_front_hooks
);
2475 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
2476 staticpro (&Qinsert_behind_hooks
);
2477 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
2478 staticpro (&Qget_file_buffer
);
2479 Qget_file_buffer
= intern ("get-file-buffer");
2480 Qpriority
= intern ("priority");
2481 staticpro (&Qpriority
);
2482 Qwindow
= intern ("window");
2483 staticpro (&Qwindow
);
2485 Qoverlayp
= intern ("overlayp");
2487 Fput (Qprotected_field
, Qerror_conditions
,
2488 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2489 Fput (Qprotected_field
, Qerror_message
,
2490 build_string ("Attempt to modify a protected field"));
2492 /* All these use DEFVAR_LISP_NOPRO because the slots in
2493 buffer_defaults will all be marked via Vbuffer_defaults. */
2495 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2496 &buffer_defaults
.mode_line_format
,
2497 "Default value of `mode-line-format' for buffers that don't override it.\n\
2498 This is the same as (default-value 'mode-line-format).");
2500 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2501 &buffer_defaults
.abbrev_mode
,
2502 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2503 This is the same as (default-value 'abbrev-mode).");
2505 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2506 &buffer_defaults
.ctl_arrow
,
2507 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2508 This is the same as (default-value 'ctl-arrow).");
2510 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2511 &buffer_defaults
.truncate_lines
,
2512 "Default value of `truncate-lines' for buffers that do not override it.\n\
2513 This is the same as (default-value 'truncate-lines).");
2515 DEFVAR_LISP_NOPRO ("default-fill-column",
2516 &buffer_defaults
.fill_column
,
2517 "Default value of `fill-column' for buffers that do not override it.\n\
2518 This is the same as (default-value 'fill-column).");
2520 DEFVAR_LISP_NOPRO ("default-left-margin",
2521 &buffer_defaults
.left_margin
,
2522 "Default value of `left-margin' for buffers that do not override it.\n\
2523 This is the same as (default-value 'left-margin).");
2525 DEFVAR_LISP_NOPRO ("default-tab-width",
2526 &buffer_defaults
.tab_width
,
2527 "Default value of `tab-width' for buffers that do not override it.\n\
2528 This is the same as (default-value 'tab-width).");
2530 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2531 &buffer_defaults
.case_fold_search
,
2532 "Default value of `case-fold-search' for buffers that don't override it.\n\
2533 This is the same as (default-value 'case-fold-search).");
2536 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
2537 &buffer_defaults
.buffer_file_type
,
2538 "Default file type for buffers that do not override it.\n\
2539 This is the same as (default-value 'buffer-file-type).\n\
2540 The file type is nil for text, t for binary.");
2543 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2546 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2547 But make-docfile finds it!
2548 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2550 "Template for displaying mode line for current buffer.\n\
2551 Each buffer has its own value of this variable.\n\
2552 Value may be a string, a symbol or a list or cons cell.\n\
2553 For a symbol, its value is used (but it is ignored if t or nil).\n\
2554 A string appearing directly as the value of a symbol is processed verbatim\n\
2555 in that the %-constructs below are not recognized.\n\
2556 For a list whose car is a symbol, the symbol's value is taken,\n\
2557 and if that is non-nil, the cadr of the list is processed recursively.\n\
2558 Otherwise, the caddr of the list (if there is one) is processed.\n\
2559 For a list whose car is a string or list, each element is processed\n\
2560 recursively and the results are effectively concatenated.\n\
2561 For a list whose car is an integer, the cdr of the list is processed\n\
2562 and padded (if the number is positive) or truncated (if negative)\n\
2563 to the width specified by that number.\n\
2564 A string is printed verbatim in the mode line except for %-constructs:\n\
2565 (%-constructs are allowed when the string is the entire mode-line-format\n\
2566 or when it is found in a cons-cell or a list)\n\
2567 %b -- print buffer name. %f -- print visited file name.\n\
2568 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
2569 %s -- print process status. %l -- print the current line number.\n\
2570 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
2571 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
2572 or print Bottom or All.\n\
2573 %n -- print Narrow if appropriate.\n\
2574 %t -- print T if files is text, B if binary.\n\
2575 %[ -- print one [ for each recursive editing level. %] similar.\n\
2576 %% -- print %. %- -- print infinitely many dashes.\n\
2577 Decimal digits after the % specify field width to which to pad.");
2580 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2581 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2582 nil here means use current buffer's major mode.");
2584 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2585 make_number (Lisp_Symbol
),
2586 "Symbol for current buffer's major mode.");
2588 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2589 make_number (Lisp_String
),
2590 "Pretty name of current buffer's major mode (a string).");
2592 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2593 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2594 Automatically becomes buffer-local when set in any fashion.");
2596 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2598 "*Non-nil if searches should ignore case.\n\
2599 Automatically becomes buffer-local when set in any fashion.");
2601 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2602 make_number (Lisp_Int
),
2603 "*Column beyond which automatic line-wrapping should happen.\n\
2604 Automatically becomes buffer-local when set in any fashion.");
2606 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2607 make_number (Lisp_Int
),
2608 "*Column for the default indent-line-function to indent to.\n\
2609 Linefeed indents to this column in Fundamental mode.\n\
2610 Automatically becomes buffer-local when set in any fashion.");
2612 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2613 make_number (Lisp_Int
),
2614 "*Distance between tab stops (for display of tab characters), in columns.\n\
2615 Automatically becomes buffer-local when set in any fashion.");
2617 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2618 "*Non-nil means display control chars with uparrow.\n\
2619 Nil means use backslash and octal digits.\n\
2620 Automatically becomes buffer-local when set in any fashion.\n\
2621 This variable does not apply to characters whose display is specified\n\
2622 in the current display table (if there is one).");
2624 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2625 "*Non-nil means do not display continuation lines;\n\
2626 give each line of text one screen line.\n\
2627 Automatically becomes buffer-local when set in any fashion.\n\
2629 Note that this is overridden by the variable\n\
2630 `truncate-partial-width-windows' if that variable is non-nil\n\
2631 and this buffer is not full-frame width.");
2634 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
2636 "*If visited file is text, nil; otherwise, t.");
2639 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2640 make_number (Lisp_String
),
2641 "Name of default directory of current buffer. Should end with slash.\n\
2642 Each buffer has its own value of this variable.");
2644 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2646 "Function called (if non-nil) to perform auto-fill.\n\
2647 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2648 Each buffer has its own value of this variable.\n\
2649 NOTE: This variable is not an ordinary hook;\n\
2650 It may not be a list of functions.");
2652 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2653 make_number (Lisp_String
),
2654 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2655 Each buffer has its own value of this variable.");
2657 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2658 ¤t_buffer
->auto_save_file_name
,
2659 make_number (Lisp_String
),
2660 "Name of file for auto-saving current buffer,\n\
2661 or nil if buffer should not be auto-saved.\n\
2662 Each buffer has its own value of this variable.");
2664 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2665 "Non-nil if this buffer is read-only.\n\
2666 Each buffer has its own value of this variable.");
2668 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2669 "Non-nil if this buffer's file has been backed up.\n\
2670 Backing up is done before the first time the file is saved.\n\
2671 Each buffer has its own value of this variable.");
2673 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2674 make_number (Lisp_Int
),
2675 "Length of current buffer when last read in, saved or auto-saved.\n\
2677 Each buffer has its own value of this variable.");
2679 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2681 "Non-nil enables selective display:\n\
2682 Integer N as value means display only lines\n\
2683 that start with less than n columns of space.\n\
2684 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2685 Then ^M's in the file are written into files as newlines.\n\n\
2686 Automatically becomes buffer-local when set in any fashion.");
2689 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2690 ¤t_buffer
->selective_display_ellipses
,
2692 "t means display ... on previous line when a line is invisible.\n\
2693 Automatically becomes buffer-local when set in any fashion.");
2696 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2697 "Non-nil if self-insertion should replace existing text.\n\
2698 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2699 inserts at the end of a line, and inserts when point is before a tab,\n\
2700 until the tab is filled in.\n\
2701 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2702 Automatically becomes buffer-local when set in any fashion.");
2704 #if 0 /* The doc string is too long for some compilers,
2705 but make-docfile can find it in this comment. */
2706 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2708 "Display table that controls display of the contents of current buffer.\n\
2709 Automatically becomes buffer-local when set in any fashion.\n\
2710 The display table is a vector created with `make-display-table'.\n\
2711 The first 256 elements control how to display each possible text character.\n\
2712 Each value should be a vector of characters or nil;\n\
2713 nil means display the character in the default fashion.\n\
2714 The remaining five elements control the display of\n\
2715 the end of a truncated screen line (element 256, a single character);\n\
2716 the end of a continued line (element 257, a single character);\n\
2717 the escape character used to display character codes in octal\n\
2718 (element 258, a single character);\n\
2719 the character used as an arrow for control characters (element 259,\n\
2720 a single character);\n\
2721 the decoration indicating the presence of invisible lines (element 260,\n\
2722 a vector of characters).\n\
2723 If this variable is nil, the value of `standard-display-table' is used.\n\
2724 Each window can have its own, overriding display table.");
2726 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2729 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2732 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2733 "Function to call before each text change.\n\
2734 Two arguments are passed to the function: the positions of\n\
2735 the beginning and end of the range of old text to be changed.\n\
2736 \(For an insertion, the beginning and end are at the same place.)\n\
2737 No information is given about the length of the text after the change.\n\
2739 Buffer changes made while executing the `before-change-function'\n\
2740 don't call any before-change or after-change functions.\n\
2741 That's because these variables are temporarily set to nil.\n\
2742 As a result, a hook function cannot straightforwardly alter the value of\n\
2743 these variables. See the Emacs Lisp manual for a way of\n\
2744 accomplishing an equivalent result by using other variables.");
2745 Vbefore_change_function
= Qnil
;
2747 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2748 "Function to call after each text change.\n\
2749 Three arguments are passed to the function: the positions of\n\
2750 the beginning and end of the range of changed text,\n\
2751 and the length of the pre-change text replaced by that range.\n\
2752 \(For an insertion, the pre-change length is zero;\n\
2753 for a deletion, that length is the number of characters deleted,\n\
2754 and the post-change beginning and end are at the same place.)\n\
2756 Buffer changes made while executing the `after-change-function'\n\
2757 don't call any before-change or after-change functions.\n\
2758 That's because these variables are temporarily set to nil.\n\
2759 As a result, a hook function cannot straightforwardly alter the value of\n\
2760 these variables. See the Emacs Lisp manual for a way of\n\
2761 accomplishing an equivalent result by using other variables.");
2762 Vafter_change_function
= Qnil
;
2764 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
2765 "List of functions to call before each text change.\n\
2766 Two arguments are passed to each function: the positions of\n\
2767 the beginning and end of the range of old text to be changed.\n\
2768 \(For an insertion, the beginning and end are at the same place.)\n\
2769 No information is given about the length of the text after the change.\n\
2771 Buffer changes made while executing the `before-change-functions'\n\
2772 don't call any before-change or after-change functions.\n\
2773 That's because these variables are temporarily set to nil.\n\
2774 As a result, a hook function cannot straightforwardly alter the value of\n\
2775 these variables. See the Emacs Lisp manual for a way of\n\
2776 accomplishing an equivalent result by using other variables.");
2777 Vbefore_change_functions
= Qnil
;
2779 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
2780 "List of function to call after each text change.\n\
2781 Three arguments are passed to each function: the positions of\n\
2782 the beginning and end of the range of changed text,\n\
2783 and the length of the pre-change text replaced by that range.\n\
2784 \(For an insertion, the pre-change length is zero;\n\
2785 for a deletion, that length is the number of characters deleted,\n\
2786 and the post-change beginning and end are at the same place.)\n\
2788 Buffer changes made while executing the `after-change-functions'\n\
2789 don't call any before-change or after-change functions.\n\
2790 That's because these variables are temporarily set to nil.\n\
2791 As a result, a hook function cannot straightforwardly alter the value of\n\
2792 these variables. See the Emacs Lisp manual for a way of\n\
2793 accomplishing an equivalent result by using other variables.");
2795 Vafter_change_functions
= Qnil
;
2797 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2798 "A list of functions to call before changing a buffer which is unmodified.\n\
2799 The functions are run using the `run-hooks' function.");
2800 Vfirst_change_hook
= Qnil
;
2801 Qfirst_change_hook
= intern ("first-change-hook");
2802 staticpro (&Qfirst_change_hook
);
2804 #if 0 /* The doc string is too long for some compilers,
2805 but make-docfile can find it in this comment. */
2806 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2807 "List of undo entries in current buffer.\n\
2808 Recent changes come first; older changes follow newer.\n\
2810 An entry (START . END) represents an insertion which begins at\n\
2811 position START and ends at position END.\n\
2813 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2814 from (abs POSITION). If POSITION is positive, point was at the front\n\
2815 of the text being deleted; if negative, point was at the end.\n\
2817 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2818 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2819 16-bit words of the buffer's modification count at the time. If the\n\
2820 modification count of the most recent save is different, this entry is\n\
2823 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2824 was modified between BEG and END. PROP is the property name,\n\
2825 and VAL is the old value.\n\
2827 An entry of the form POSITION indicates that point was at the buffer\n\
2828 location given by the integer. Undoing an entry of this form places\n\
2829 point at POSITION.\n\
2831 nil marks undo boundaries. The undo command treats the changes\n\
2832 between two undo boundaries as a single step to be undone.\n\
2834 If the value of the variable is t, undo information is not recorded.");
2836 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2839 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2840 "Non-nil means the mark and region are currently active in this buffer.\n\
2841 Automatically local in all buffers.");
2843 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2844 "*Non-nil means deactivate the mark when the buffer contents change.");
2845 Vtransient_mark_mode
= Qnil
;
2847 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
2848 "*Non-nil means disregard read-only status of buffers or characters.\n\
2849 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
2850 text properties. If the value is a list, disregard `buffer-read-only'\n\
2851 and disregard a `read-only' text property if the property value\n\
2852 is a member of the list.");
2853 Vinhibit_read_only
= Qnil
;
2855 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
2856 "List of functions called with no args to query before killing a buffer.");
2857 Vkill_buffer_query_functions
= Qnil
;
2859 defsubr (&Sbuffer_list
);
2860 defsubr (&Sget_buffer
);
2861 defsubr (&Sget_file_buffer
);
2862 defsubr (&Sget_buffer_create
);
2863 defsubr (&Sgenerate_new_buffer_name
);
2864 defsubr (&Sbuffer_name
);
2865 /*defsubr (&Sbuffer_number);*/
2866 defsubr (&Sbuffer_file_name
);
2867 defsubr (&Sbuffer_local_variables
);
2868 defsubr (&Sbuffer_modified_p
);
2869 defsubr (&Sset_buffer_modified_p
);
2870 defsubr (&Sbuffer_modified_tick
);
2871 defsubr (&Srename_buffer
);
2872 defsubr (&Sother_buffer
);
2873 defsubr (&Sbuffer_disable_undo
);
2874 defsubr (&Sbuffer_enable_undo
);
2875 defsubr (&Skill_buffer
);
2876 defsubr (&Serase_buffer
);
2877 defsubr (&Sswitch_to_buffer
);
2878 defsubr (&Spop_to_buffer
);
2879 defsubr (&Scurrent_buffer
);
2880 defsubr (&Sset_buffer
);
2881 defsubr (&Sbarf_if_buffer_read_only
);
2882 defsubr (&Sbury_buffer
);
2883 defsubr (&Slist_buffers
);
2884 defsubr (&Skill_all_local_variables
);
2886 defsubr (&Soverlayp
);
2887 defsubr (&Smake_overlay
);
2888 defsubr (&Sdelete_overlay
);
2889 defsubr (&Smove_overlay
);
2890 defsubr (&Soverlay_start
);
2891 defsubr (&Soverlay_end
);
2892 defsubr (&Soverlay_buffer
);
2893 defsubr (&Soverlay_properties
);
2894 defsubr (&Soverlays_at
);
2895 defsubr (&Snext_overlay_change
);
2896 defsubr (&Soverlay_recenter
);
2897 defsubr (&Soverlay_lists
);
2898 defsubr (&Soverlay_get
);
2899 defsubr (&Soverlay_put
);
2904 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2905 initial_define_key (control_x_map
, 'k', "kill-buffer");
2906 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");
2908 /* This must not be in syms_of_buffer, because Qdisabled is not
2909 initialized when that function gets called. */
2910 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);