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, if we saved it in this session. */
805 if (XTYPE (b
->auto_save_file_name
) == Lisp_String
806 && b
->auto_save_modified
!= 0)
809 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
811 unlink (XSTRING (b
->auto_save_file_name
)->data
);
814 /* Unchain all markers of this buffer
815 and leave them pointing nowhere. */
816 for (tem
= b
->markers
; !EQ (tem
, Qnil
); )
825 /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
826 INITIALIZE_INTERVAL (b
, NULL_INTERVAL
);
827 /* Perhaps we should explicitly free the interval tree here... */
831 BUFFER_FREE (BUF_BEG_ADDR (b
));
838 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
839 we do this each time BUF is selected visibly, the more recently
840 selected buffers are always closer to the front of the list. This
841 means that other_buffer is more likely to choose a relevant buffer. */
846 register Lisp_Object link
, prev
;
849 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCONS (link
)->cdr
)
851 if (EQ (XCONS (XCONS (link
)->car
)->cdr
, buf
))
856 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
857 we cannot use Fdelq itself here because it allows quitting. */
860 Vbuffer_alist
= XCONS (Vbuffer_alist
)->cdr
;
862 XCONS (prev
)->cdr
= XCONS (XCONS (prev
)->cdr
)->cdr
;
864 XCONS(link
)->cdr
= Vbuffer_alist
;
865 Vbuffer_alist
= link
;
868 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
869 "Select buffer BUFFER in the current window.\n\
870 BUFFER may be a buffer or a buffer name.\n\
871 Optional second arg NORECORD non-nil means\n\
872 do not put this buffer at the front of the list of recently selected ones.\n\
874 WARNING: This is NOT the way to work on another buffer temporarily\n\
875 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
876 the window-buffer correspondences.")
878 Lisp_Object bufname
, norecord
;
880 register Lisp_Object buf
;
883 if (EQ (minibuf_window
, selected_window
))
884 error ("Cannot switch buffers in minibuffer window");
885 tem
= Fwindow_dedicated_p (selected_window
);
887 error ("Cannot switch buffers in a dedicated window");
890 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
892 buf
= Fget_buffer_create (bufname
);
897 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
898 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
905 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 2, 0,
906 "Select buffer BUFFER in some window, preferably a different one.\n\
907 If BUFFER is nil, then some other buffer is chosen.\n\
908 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
909 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
910 window even if BUFFER is already visible in the selected window.")
912 Lisp_Object bufname
, other
;
914 register Lisp_Object buf
;
916 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
);
918 buf
= Fget_buffer_create (bufname
);
921 Fselect_window (Fdisplay_buffer (buf
, other
));
925 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
926 "Return the current buffer as a Lisp object.")
929 register Lisp_Object buf
;
930 XSET (buf
, Lisp_Buffer
, current_buffer
);
934 /* Set the current buffer to b */
937 set_buffer_internal (b
)
938 register struct buffer
*b
;
940 register struct buffer
*old_buf
;
941 register Lisp_Object tail
, valcontents
;
944 if (current_buffer
== b
)
947 windows_or_buffers_changed
= 1;
948 old_buf
= current_buffer
;
950 last_known_column_point
= -1; /* invalidate indentation cache */
952 /* Look down buffer's list of local Lisp variables
953 to find and update any that forward into C variables. */
955 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
957 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
958 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
959 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
960 && (tem
= XTYPE (XCONS (valcontents
)->car
),
961 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
962 || tem
== Lisp_Objfwd
)))
963 /* Just reference the variable
964 to cause it to become set for this buffer. */
965 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
968 /* Do the same with any others that were local to the previous buffer */
971 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCONS (tail
)->cdr
)
973 valcontents
= XSYMBOL (XCONS (XCONS (tail
)->car
)->car
)->value
;
974 if ((XTYPE (valcontents
) == Lisp_Buffer_Local_Value
975 || XTYPE (valcontents
) == Lisp_Some_Buffer_Local_Value
)
976 && (tem
= XTYPE (XCONS (valcontents
)->car
),
977 (tem
== Lisp_Boolfwd
|| tem
== Lisp_Intfwd
978 || tem
== Lisp_Objfwd
)))
979 /* Just reference the variable
980 to cause it to become set for this buffer. */
981 Fsymbol_value (XCONS (XCONS (tail
)->car
)->car
);
985 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
986 "Make the buffer BUFFER current for editing operations.\n\
987 BUFFER may be a buffer or the name of an existing buffer.\n\
988 See also `save-excursion' when you want to make a buffer current temporarily.\n\
989 This function does not display the buffer, so its effect ends\n\
990 when the current command terminates.\n\
991 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
993 register Lisp_Object bufname
;
995 register Lisp_Object buffer
;
996 buffer
= Fget_buffer (bufname
);
999 if (NILP (XBUFFER (buffer
)->name
))
1000 error ("Selecting deleted buffer");
1001 set_buffer_internal (XBUFFER (buffer
));
1005 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1006 Sbarf_if_buffer_read_only
, 0, 0, 0,
1007 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1010 if (!NILP (current_buffer
->read_only
)
1011 && NILP (Vinhibit_read_only
))
1012 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1016 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1017 "Put BUFFER at the end of the list of all buffers.\n\
1018 There it is the least likely candidate for `other-buffer' to return;\n\
1019 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1020 If BUFFER is nil or omitted, bury the current buffer.\n\
1021 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1022 selected window if it is displayed there.")
1024 register Lisp_Object buf
;
1026 /* Figure out what buffer we're going to bury. */
1029 XSET (buf
, Lisp_Buffer
, current_buffer
);
1031 /* If we're burying the current buffer, unshow it. */
1032 Fswitch_to_buffer (Fother_buffer (buf
, Qnil
), Qnil
);
1038 buf1
= Fget_buffer (buf
);
1044 /* Move buf to the end of the buffer list. */
1046 register Lisp_Object aelt
, link
;
1048 aelt
= Frassq (buf
, Vbuffer_alist
);
1049 link
= Fmemq (aelt
, Vbuffer_alist
);
1050 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1051 XCONS (link
)->cdr
= Qnil
;
1052 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1058 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1059 "Delete the entire contents of the current buffer.\n\
1060 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1061 so the buffer is truly empty after this.")
1066 current_buffer
->last_window_start
= 1;
1067 /* Prevent warnings, or suspension of auto saving, that would happen
1068 if future size is less than past size. Use of erase-buffer
1069 implies that the future text is not really related to the past text. */
1070 XFASTINT (current_buffer
->save_length
) = 0;
1074 validate_region (b
, e
)
1075 register Lisp_Object
*b
, *e
;
1079 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1080 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1082 if (XINT (*b
) > XINT (*e
))
1084 i
= XFASTINT (*b
); /* This is legit even if *b is < 0 */
1086 XFASTINT (*e
) = i
; /* because this is all we do with i. */
1089 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1090 && XINT (*e
) <= ZV
))
1091 args_out_of_range (*b
, *e
);
1095 list_buffers_1 (files
)
1098 register Lisp_Object tail
, tem
, buf
;
1099 Lisp_Object col1
, col2
, col3
, minspace
;
1100 register struct buffer
*old
= current_buffer
, *b
;
1101 Lisp_Object desired_point
;
1102 Lisp_Object other_file_symbol
;
1104 desired_point
= Qnil
;
1105 other_file_symbol
= intern ("list-buffers-directory");
1107 XFASTINT (col1
) = 19;
1108 XFASTINT (col2
) = 25;
1109 XFASTINT (col3
) = 40;
1110 XFASTINT (minspace
) = 1;
1112 Fset_buffer (Vstandard_output
);
1113 Fbuffer_disable_undo (Vstandard_output
);
1114 current_buffer
->read_only
= Qnil
;
1117 MR Buffer Size Mode File\n\
1118 -- ------ ---- ---- ----\n", -1);
1120 for (tail
= Vbuffer_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1122 buf
= Fcdr (Fcar (tail
));
1124 /* Don't mention the minibuffers. */
1125 if (XSTRING (b
->name
)->data
[0] == ' ')
1127 /* Optionally don't mention buffers that lack files. */
1128 if (!NILP (files
) && NILP (b
->filename
))
1130 /* Identify the current buffer. */
1132 XFASTINT (desired_point
) = point
;
1133 write_string (b
== old
? "." : " ", -1);
1134 /* Identify modified buffers */
1135 write_string (BUF_MODIFF (b
) > b
->save_modified
? "*" : " ", -1);
1136 write_string (NILP (b
->read_only
) ? " " : "% ", -1);
1137 Fprinc (b
->name
, Qnil
);
1138 Findent_to (col1
, make_number (2));
1139 XFASTINT (tem
) = BUF_Z (b
) - BUF_BEG (b
);
1141 Findent_to (col2
, minspace
);
1142 Fprinc (b
->mode_name
, Qnil
);
1143 Findent_to (col3
, minspace
);
1145 if (!NILP (b
->filename
))
1146 Fprinc (b
->filename
, Qnil
);
1149 /* No visited file; check local value of list-buffers-directory. */
1151 set_buffer_internal (b
);
1152 tem
= Fboundp (other_file_symbol
);
1155 tem
= Fsymbol_value (other_file_symbol
);
1156 Fset_buffer (Vstandard_output
);
1157 if (XTYPE (tem
) == Lisp_String
)
1161 Fset_buffer (Vstandard_output
);
1163 write_string ("\n", -1);
1166 tail
= intern ("Buffer-menu-mode");
1167 if ((tem
= Ffboundp (tail
), !NILP (tem
)))
1169 set_buffer_internal (old
);
1170 return desired_point
;
1173 DEFUN ("list-buffers", Flist_buffers
, Slist_buffers
, 0, 1, "P",
1174 "Display a list of names of existing buffers.\n\
1175 The list is displayed in a buffer named `*Buffer List*'.\n\
1176 Note that buffers with names starting with spaces are omitted.\n\
1177 Non-null optional arg FILES-ONLY means mention only file buffers.\n\
1179 The M column contains a * for buffers that are modified.\n\
1180 The R column contains a % for buffers that are read-only.")
1184 Lisp_Object desired_point
;
1187 = internal_with_output_to_temp_buffer ("*Buffer List*",
1188 list_buffers_1
, files
);
1190 if (NUMBERP (desired_point
))
1192 int count
= specpdl_ptr
- specpdl
;
1193 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
1194 Fset_buffer (build_string ("*Buffer List*"));
1195 SET_PT (XINT (desired_point
));
1196 return unbind_to (count
, Qnil
);
1201 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
1203 "Switch to Fundamental mode by killing current buffer's local variables.\n\
1204 Most local variable bindings are eliminated so that the default values\n\
1205 become effective once more. Also, the syntax table is set from\n\
1206 `standard-syntax-table', the local keymap is set to nil,\n\
1207 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
1208 This function also forces redisplay of the mode line.\n\
1210 Every function to select a new major mode starts by\n\
1211 calling this function.\n\n\
1212 As a special exception, local variables whose names have\n\
1213 a non-nil `permanent-local' property are not eliminated by this function.\n\
1215 The first thing this function does is run\n\
1216 the normal hook `change-major-mode-hook'.")
1219 register Lisp_Object alist
, sym
, tem
;
1222 if (!NILP (Vrun_hooks
))
1223 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
1224 oalist
= current_buffer
->local_var_alist
;
1226 /* Make sure no local variables remain set up with this buffer
1227 for their current values. */
1229 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1231 sym
= XCONS (XCONS (alist
)->car
)->car
;
1233 /* Need not do anything if some other buffer's binding is now encached. */
1234 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
;
1235 if (XBUFFER (tem
) == current_buffer
)
1237 /* Symbol is set up for this buffer's old local value.
1238 Set it up for the current buffer with the default value. */
1240 tem
= XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->cdr
;
1241 /* Store the symbol's current value into the alist entry
1242 it is currently set up for. This is so that, if the
1243 local is marked permanent, and we make it local again below,
1244 we don't lose the value. */
1245 XCONS (XCONS (tem
)->car
)->cdr
1246 = do_symval_forwarding (XCONS (XSYMBOL (sym
)->value
)->car
);
1247 /* Switch to the symbol's default-value alist entry. */
1248 XCONS (tem
)->car
= tem
;
1249 /* Mark it as current for the current buffer. */
1250 XCONS (XCONS (XSYMBOL (sym
)->value
)->cdr
)->car
= Fcurrent_buffer ();
1251 /* Store the current value into any forwarding in the symbol. */
1252 store_symval_forwarding (sym
, XCONS (XSYMBOL (sym
)->value
)->car
,
1257 /* Actually eliminate all local bindings of this buffer. */
1259 reset_buffer_local_variables (current_buffer
);
1261 /* Redisplay mode lines; we are changing major mode. */
1263 update_mode_lines
++;
1265 /* Any which are supposed to be permanent,
1266 make local again, with the same values they had. */
1268 for (alist
= oalist
; !NILP (alist
); alist
= XCONS (alist
)->cdr
)
1270 sym
= XCONS (XCONS (alist
)->car
)->car
;
1271 tem
= Fget (sym
, Qpermanent_local
);
1274 Fmake_local_variable (sym
);
1275 Fset (sym
, XCONS (XCONS (alist
)->car
)->cdr
);
1279 /* Force mode-line redisplay. Useful here because all major mode
1280 commands call this function. */
1281 update_mode_lines
++;
1286 /* Find all the overlays in the current buffer that contain position POS.
1287 Return the number found, and store them in a vector in *VEC_PTR.
1288 Store in *LEN_PTR the size allocated for the vector.
1289 Store in *NEXT_PTR the next position after POS where an overlay starts,
1290 or ZV if there are no more overlays.
1292 *VEC_PTR and *LEN_PTR should contain a valid vector and size
1293 when this function is called.
1295 If EXTEND is non-zero, we make the vector bigger if necessary.
1296 If EXTEND is zero, we never extend the vector,
1297 and we store only as many overlays as will fit.
1298 But we still return the total number of overlays. */
1301 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
)
1304 Lisp_Object
**vec_ptr
;
1308 Lisp_Object tail
, overlay
, start
, end
, result
;
1311 Lisp_Object
*vec
= *vec_ptr
;
1313 int inhibit_storing
= 0;
1315 for (tail
= current_buffer
->overlays_before
;
1316 XGCTYPE (tail
) == Lisp_Cons
;
1317 tail
= XCONS (tail
)->cdr
)
1321 overlay
= XCONS (tail
)->car
;
1322 if (XGCTYPE (overlay
) != Lisp_Overlay
)
1325 start
= OVERLAY_START (overlay
);
1326 end
= OVERLAY_END (overlay
);
1327 if (OVERLAY_POSITION (end
) <= pos
)
1329 startpos
= OVERLAY_POSITION (start
);
1330 if (startpos
<= pos
)
1334 /* The supplied vector is full.
1335 Either make it bigger, or don't store any more in it. */
1338 *len_ptr
= len
*= 2;
1339 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1343 inhibit_storing
= 1;
1346 if (!inhibit_storing
)
1348 /* Keep counting overlays even if we can't return them all. */
1351 else if (startpos
< next
)
1355 for (tail
= current_buffer
->overlays_after
;
1356 XGCTYPE (tail
) == Lisp_Cons
;
1357 tail
= XCONS (tail
)->cdr
)
1361 overlay
= XCONS (tail
)->car
;
1362 if (XGCTYPE (overlay
) != Lisp_Overlay
)
1365 start
= OVERLAY_START (overlay
);
1366 end
= OVERLAY_END (overlay
);
1367 startpos
= OVERLAY_POSITION (start
);
1370 if (startpos
< next
)
1374 if (pos
< OVERLAY_POSITION (end
))
1380 *len_ptr
= len
*= 2;
1381 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
1385 inhibit_storing
= 1;
1388 if (!inhibit_storing
)
1400 Lisp_Object overlay
;
1406 compare_overlays (s1
, s2
)
1407 struct sortvec
*s1
, *s2
;
1409 if (s1
->priority
!= s2
->priority
)
1410 return s1
->priority
- s2
->priority
;
1411 if (s1
->beg
!= s2
->beg
)
1412 return s1
->beg
- s2
->beg
;
1413 if (s1
->end
!= s2
->end
)
1414 return s2
->end
- s1
->end
;
1418 /* Sort an array of overlays by priority. The array is modified in place.
1419 The return value is the new size; this may be smaller than the original
1420 size if some of the overlays were invalid or were window-specific. */
1422 sort_overlays (overlay_vec
, noverlays
, w
)
1423 Lisp_Object
*overlay_vec
;
1428 struct sortvec
*sortvec
;
1429 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
1431 /* Put the valid and relevant overlays into sortvec. */
1433 for (i
= 0, j
= 0; i
< noverlays
; i
++)
1436 Lisp_Object overlay
;
1438 overlay
= overlay_vec
[i
];
1439 if (OVERLAY_VALID (overlay
)
1440 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
1441 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
1443 /* If we're interested in a specific window, then ignore
1444 overlays that are limited to some other window. */
1449 window
= Foverlay_get (overlay
, Qwindow
);
1450 if (XTYPE (window
) == Lisp_Window
&& XWINDOW (window
) != w
)
1454 /* This overlay is good and counts: put it into sortvec. */
1455 sortvec
[j
].overlay
= overlay
;
1456 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1457 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1458 tem
= Foverlay_get (overlay
, Qpriority
);
1460 sortvec
[j
].priority
= XINT (tem
);
1462 sortvec
[j
].priority
= 0;
1468 /* Sort the overlays into the proper order: increasing priority. */
1471 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
1473 for (i
= 0; i
< noverlays
; i
++)
1474 overlay_vec
[i
] = sortvec
[i
].overlay
;
1478 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
1481 recenter_overlay_lists (buf
, pos
)
1485 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
1487 /* See if anything in overlays_before should move to overlays_after. */
1489 /* We don't strictly need prev in this loop; it should always be nil.
1490 But we use it for symmetry and in case that should cease to be true
1491 with some future change. */
1493 for (tail
= buf
->overlays_before
;
1495 prev
= tail
, tail
= next
)
1497 next
= XCONS (tail
)->cdr
;
1498 overlay
= XCONS (tail
)->car
;
1500 /* If the overlay is not valid, get rid of it. */
1501 if (!OVERLAY_VALID (overlay
))
1506 /* Splice the cons cell TAIL out of overlays_before. */
1508 XCONS (prev
)->cdr
= next
;
1510 buf
->overlays_before
= next
;
1516 beg
= OVERLAY_START (overlay
);
1517 end
= OVERLAY_END (overlay
);
1519 if (OVERLAY_POSITION (end
) > pos
)
1521 /* OVERLAY needs to be moved. */
1522 int where
= OVERLAY_POSITION (beg
);
1523 Lisp_Object other
, other_prev
;
1525 /* Splice the cons cell TAIL out of overlays_before. */
1527 XCONS (prev
)->cdr
= next
;
1529 buf
->overlays_before
= next
;
1531 /* Search thru overlays_after for where to put it. */
1533 for (other
= buf
->overlays_after
;
1535 other_prev
= other
, other
= XCONS (other
)->cdr
)
1537 Lisp_Object otherbeg
, otheroverlay
, follower
;
1540 otheroverlay
= XCONS (other
)->car
;
1541 if (! OVERLAY_VALID (otheroverlay
))
1544 otherbeg
= OVERLAY_START (otheroverlay
);
1545 if (OVERLAY_POSITION (otherbeg
) >= where
)
1549 /* Add TAIL to overlays_after before OTHER. */
1550 XCONS (tail
)->cdr
= other
;
1551 if (!NILP (other_prev
))
1552 XCONS (other_prev
)->cdr
= tail
;
1554 buf
->overlays_after
= tail
;
1558 /* We've reached the things that should stay in overlays_before.
1559 All the rest of overlays_before must end even earlier,
1564 /* See if anything in overlays_after should be in overlays_before. */
1566 for (tail
= buf
->overlays_after
;
1568 prev
= tail
, tail
= next
)
1570 next
= XCONS (tail
)->cdr
;
1571 overlay
= XCONS (tail
)->car
;
1573 /* If the overlay is not valid, get rid of it. */
1574 if (!OVERLAY_VALID (overlay
))
1579 /* Splice the cons cell TAIL out of overlays_after. */
1581 XCONS (prev
)->cdr
= next
;
1583 buf
->overlays_after
= next
;
1589 beg
= OVERLAY_START (overlay
);
1590 end
= OVERLAY_END (overlay
);
1592 /* Stop looking, when we know that nothing further
1593 can possibly end before POS. */
1594 if (OVERLAY_POSITION (beg
) > pos
)
1597 if (OVERLAY_POSITION (end
) <= pos
)
1599 /* OVERLAY needs to be moved. */
1600 int where
= OVERLAY_POSITION (end
);
1601 Lisp_Object other
, other_prev
;
1603 /* Splice the cons cell TAIL out of overlays_after. */
1605 XCONS (prev
)->cdr
= next
;
1607 buf
->overlays_after
= next
;
1609 /* Search thru overlays_before for where to put it. */
1611 for (other
= buf
->overlays_before
;
1613 other_prev
= other
, other
= XCONS (other
)->cdr
)
1615 Lisp_Object otherend
, otheroverlay
;
1618 otheroverlay
= XCONS (other
)->car
;
1619 if (! OVERLAY_VALID (otheroverlay
))
1622 otherend
= OVERLAY_END (otheroverlay
);
1623 if (OVERLAY_POSITION (otherend
) <= where
)
1627 /* Add TAIL to overlays_before before OTHER. */
1628 XCONS (tail
)->cdr
= other
;
1629 if (!NILP (other_prev
))
1630 XCONS (other_prev
)->cdr
= tail
;
1632 buf
->overlays_before
= tail
;
1637 XFASTINT (buf
->overlay_center
) = pos
;
1640 /* Fix up overlays that were garbled as a result of permuting markers
1641 in the range START through END. Any overlay with at least one
1642 endpoint in this range will need to be unlinked from the overlay
1643 list and reinserted in its proper place.
1644 Such an overlay might even have negative size at this point.
1645 If so, we'll reverse the endpoints. Can you think of anything
1646 better to do in this situation? */
1648 fix_overlays_in_range (start
, end
)
1649 register int start
, end
;
1651 Lisp_Object tem
, overlay
;
1652 Lisp_Object before_list
, after_list
;
1653 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
1654 int startpos
, endpos
;
1656 /* This algorithm shifts links around instead of consing and GCing.
1657 The loop invariant is that before_list (resp. after_list) is a
1658 well-formed list except that its last element, the one that
1659 *pbefore (resp. *pafter) points to, is still uninitialized.
1660 So it's not a bug that before_list isn't initialized, although
1661 it may look strange. */
1662 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
1664 overlay
= XCONS (*ptail
)->car
;
1665 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1668 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1670 || (startpos
>= start
&& startpos
< end
))
1672 /* If the overlay is backwards, fix that now. */
1673 if (startpos
> endpos
)
1676 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
1677 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
1678 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
1680 /* Add it to the end of the wrong list. Later on,
1681 recenter_overlay_lists will move it to the right place. */
1682 if (endpos
< XINT (current_buffer
->overlay_center
))
1685 pafter
= &XCONS (*ptail
)->cdr
;
1690 pbefore
= &XCONS (*ptail
)->cdr
;
1692 *ptail
= XCONS (*ptail
)->cdr
;
1695 ptail
= &XCONS (*ptail
)->cdr
;
1697 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
1699 overlay
= XCONS (*ptail
)->car
;
1700 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
1701 if (startpos
>= end
)
1703 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
1704 if (startpos
>= start
1705 || (endpos
>= start
&& endpos
< end
))
1707 if (startpos
> endpos
)
1710 Fset_marker (OVERLAY_START (overlay
), endpos
, Qnil
);
1711 Fset_marker (OVERLAY_END (overlay
), startpos
, Qnil
);
1712 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
1714 if (endpos
< XINT (current_buffer
->overlay_center
))
1717 pafter
= &XCONS (*ptail
)->cdr
;
1722 pbefore
= &XCONS (*ptail
)->cdr
;
1724 *ptail
= XCONS (*ptail
)->cdr
;
1727 ptail
= &XCONS (*ptail
)->cdr
;
1730 /* Splice the constructed (wrong) lists into the buffer's lists,
1731 and let the recenter function make it sane again. */
1732 *pbefore
= current_buffer
->overlays_before
;
1733 current_buffer
->overlays_before
= before_list
;
1734 recenter_overlay_lists (current_buffer
,
1735 XINT (current_buffer
->overlay_center
));
1737 *pafter
= current_buffer
->overlays_after
;
1738 current_buffer
->overlays_after
= after_list
;
1739 recenter_overlay_lists (current_buffer
,
1740 XINT (current_buffer
->overlay_center
));
1743 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
1744 "Return t if OBJECT is an overlay.")
1748 return (OVERLAYP (object
) ? Qt
: Qnil
);
1751 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 3, 0,
1752 "Create a new overlay with range BEG to END in BUFFER.\n\
1753 If omitted, BUFFER defaults to the current buffer.\n\
1754 BEG and END may be integers or markers.")
1756 Lisp_Object beg
, end
, buffer
;
1758 Lisp_Object overlay
;
1762 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1764 CHECK_BUFFER (buffer
, 2);
1766 && ! EQ (Fmarker_buffer (beg
), buffer
))
1767 error ("Marker points into wrong buffer");
1769 && ! EQ (Fmarker_buffer (end
), buffer
))
1770 error ("Marker points into wrong buffer");
1772 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1773 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1775 if (XINT (beg
) > XINT (end
))
1778 temp
= beg
; beg
= end
; end
= temp
;
1781 b
= XBUFFER (buffer
);
1783 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
1784 end
= Fset_marker (Fmake_marker (), end
, buffer
);
1786 overlay
= Fcons (Fcons (beg
, end
), Qnil
);
1787 XSETTYPE (overlay
, Lisp_Overlay
);
1789 /* Put the new overlay on the wrong list. */
1790 end
= OVERLAY_END (overlay
);
1791 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1792 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1794 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1796 /* This puts it in the right list, and in the right order. */
1797 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1799 /* We don't need to redisplay the region covered by the overlay, because
1800 the overlay has no properties at the moment. */
1805 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
1806 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
1807 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
1808 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
1810 (overlay
, beg
, end
, buffer
)
1811 Lisp_Object overlay
, beg
, end
, buffer
;
1813 struct buffer
*b
, *ob
;
1814 Lisp_Object obuffer
;
1815 int count
= specpdl_ptr
- specpdl
;
1817 CHECK_OVERLAY (overlay
, 0);
1819 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1821 XSET (buffer
, Lisp_Buffer
, current_buffer
);
1822 CHECK_BUFFER (buffer
, 3);
1825 && ! EQ (Fmarker_buffer (beg
), buffer
))
1826 error ("Marker points into wrong buffer");
1828 && ! EQ (Fmarker_buffer (end
), buffer
))
1829 error ("Marker points into wrong buffer");
1831 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
1832 CHECK_NUMBER_COERCE_MARKER (end
, 1);
1834 specbind (Qinhibit_quit
, Qt
);
1836 if (XINT (beg
) > XINT (end
))
1839 temp
= beg
; beg
= end
; end
= temp
;
1842 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1843 b
= XBUFFER (buffer
);
1844 ob
= XBUFFER (obuffer
);
1846 /* If the overlay has changed buffers, do a thorough redisplay. */
1847 if (!EQ (buffer
, obuffer
))
1849 /* Redisplay where the overlay was. */
1850 if (!NILP (obuffer
))
1855 o_beg
= OVERLAY_START (overlay
);
1856 o_end
= OVERLAY_END (overlay
);
1857 o_beg
= OVERLAY_POSITION (o_beg
);
1858 o_end
= OVERLAY_POSITION (o_end
);
1860 redisplay_region (ob
, XINT (o_beg
), XINT (o_end
));
1863 /* Redisplay where the overlay is going to be. */
1864 redisplay_region (b
, XINT (beg
), XINT (end
));
1866 /* Don't limit redisplay to the selected window. */
1867 windows_or_buffers_changed
= 1;
1870 /* Redisplay the area the overlay has just left, or just enclosed. */
1874 int change_beg
, change_end
;
1876 o_beg
= OVERLAY_START (overlay
);
1877 o_end
= OVERLAY_END (overlay
);
1878 o_beg
= OVERLAY_POSITION (o_beg
);
1879 o_end
= OVERLAY_POSITION (o_end
);
1881 if (XINT (o_beg
) == XINT (beg
))
1882 redisplay_region (b
, XINT (o_end
), XINT (end
));
1883 else if (XINT (o_end
) == XINT (end
))
1884 redisplay_region (b
, XINT (o_beg
), XINT (beg
));
1887 if (XINT (beg
) < XINT (o_beg
)) o_beg
= beg
;
1888 if (XINT (end
) > XINT (o_end
)) o_end
= end
;
1889 redisplay_region (b
, XINT (o_beg
), XINT (o_end
));
1893 if (!NILP (obuffer
))
1895 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
1896 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
1899 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
1900 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
1902 /* Put the overlay on the wrong list. */
1903 end
= OVERLAY_END (overlay
);
1904 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
1905 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
1907 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
1909 /* This puts it in the right list, and in the right order. */
1910 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
1912 return unbind_to (count
, overlay
);
1915 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
1916 "Delete the overlay OVERLAY from its buffer.")
1918 Lisp_Object overlay
;
1922 int count
= specpdl_ptr
- specpdl
;
1924 CHECK_OVERLAY (overlay
, 0);
1926 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
1930 b
= XBUFFER (buffer
);
1932 specbind (Qinhibit_quit
, Qt
);
1934 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
1935 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
1937 redisplay_region (b
,
1938 marker_position (OVERLAY_START (overlay
)),
1939 marker_position (OVERLAY_END (overlay
)));
1941 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
1942 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
1944 return unbind_to (count
, Qnil
);
1947 /* Overlay dissection functions. */
1949 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
1950 "Return the position at which OVERLAY starts.")
1952 Lisp_Object overlay
;
1954 CHECK_OVERLAY (overlay
, 0);
1956 return (Fmarker_position (OVERLAY_START (overlay
)));
1959 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
1960 "Return the position at which OVERLAY ends.")
1962 Lisp_Object overlay
;
1964 CHECK_OVERLAY (overlay
, 0);
1966 return (Fmarker_position (OVERLAY_END (overlay
)));
1969 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
1970 "Return the buffer OVERLAY belongs to.")
1972 Lisp_Object overlay
;
1974 CHECK_OVERLAY (overlay
, 0);
1976 return Fmarker_buffer (OVERLAY_START (overlay
));
1979 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
1980 "Return a list of the properties on OVERLAY.\n\
1981 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
1984 Lisp_Object overlay
;
1986 CHECK_OVERLAY (overlay
, 0);
1988 return Fcopy_sequence (Fcdr_safe (XCONS (overlay
)->cdr
));
1992 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
1993 "Return a list of the overlays that contain position POS.")
1999 Lisp_Object
*overlay_vec
;
2003 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2006 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2008 /* Put all the overlays we want in a vector in overlay_vec.
2009 Store the length in len. */
2010 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
2012 /* Make a list of them all. */
2013 result
= Flist (noverlays
, overlay_vec
);
2015 xfree (overlay_vec
);
2019 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
2021 "Return the next position after POS where an overlay starts or ends.\n\
2022 If there are no more overlay boundaries after POS, return (point-max).")
2028 Lisp_Object
*overlay_vec
;
2033 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2036 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
2038 /* Put all the overlays we want in a vector in overlay_vec.
2039 Store the length in len.
2040 endpos gets the position where the next overlay starts. */
2041 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
, &endpos
);
2043 /* If any of these overlays ends before endpos,
2044 use its ending point instead. */
2045 for (i
= 0; i
< noverlays
; i
++)
2050 oend
= OVERLAY_END (overlay_vec
[i
]);
2051 oendpos
= OVERLAY_POSITION (oend
);
2052 if (oendpos
< endpos
)
2056 xfree (overlay_vec
);
2057 return make_number (endpos
);
2060 /* These functions are for debugging overlays. */
2062 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
2063 "Return a pair of lists giving all the overlays of the current buffer.\n\
2064 The car has all the overlays before the overlay center;\n\
2065 the cdr has all the overlays after the overlay center.\n\
2066 Recentering overlays moves overlays between these lists.\n\
2067 The lists you get are copies, so that changing them has no effect.\n\
2068 However, the overlays you get are the real objects that the buffer uses.")
2071 Lisp_Object before
, after
;
2072 before
= current_buffer
->overlays_before
;
2074 before
= Fcopy_sequence (before
);
2075 after
= current_buffer
->overlays_after
;
2077 after
= Fcopy_sequence (after
);
2079 return Fcons (before
, after
);
2082 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
2083 "Recenter the overlays of the current buffer around position POS.")
2087 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
2089 recenter_overlay_lists (current_buffer
, XINT (pos
));
2093 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
2094 "Get the property of overlay OVERLAY with property name NAME.")
2096 Lisp_Object overlay
, prop
;
2100 CHECK_OVERLAY (overlay
, 0);
2102 for (plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
2103 CONSP (plist
) && CONSP (XCONS (plist
)->cdr
);
2104 plist
= XCONS (XCONS (plist
)->cdr
)->cdr
)
2106 if (EQ (XCONS (plist
)->car
, prop
))
2107 return XCONS (XCONS (plist
)->cdr
)->car
;
2113 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
2114 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
2115 (overlay
, prop
, value
)
2116 Lisp_Object overlay
, prop
, value
;
2118 Lisp_Object plist
, tail
;
2120 CHECK_OVERLAY (overlay
, 0);
2122 tail
= Fmarker_buffer (OVERLAY_START (overlay
));
2124 redisplay_region (XMARKER (OVERLAY_START (overlay
))->buffer
,
2125 marker_position (OVERLAY_START (overlay
)),
2126 marker_position (OVERLAY_END (overlay
)));
2128 plist
= Fcdr_safe (XCONS (overlay
)->cdr
);
2131 CONSP (tail
) && CONSP (XCONS (tail
)->cdr
);
2132 tail
= XCONS (XCONS (tail
)->cdr
)->cdr
)
2134 if (EQ (XCONS (tail
)->car
, prop
))
2135 return XCONS (XCONS (tail
)->cdr
)->car
= value
;
2138 if (! CONSP (XCONS (overlay
)->cdr
))
2139 XCONS (overlay
)->cdr
= Fcons (Qnil
, Qnil
);
2141 XCONS (XCONS (overlay
)->cdr
)->cdr
2142 = Fcons (prop
, Fcons (value
, plist
));
2147 /* Run the modification-hooks of overlays that include
2148 any part of the text in START to END.
2149 Run the insert-before-hooks of overlay starting at END,
2150 and the insert-after-hooks of overlay ending at START. */
2153 verify_overlay_modification (start
, end
)
2154 Lisp_Object start
, end
;
2156 Lisp_Object prop
, overlay
, tail
;
2157 int insertion
= EQ (start
, end
);
2159 struct gcpro gcpro1
, gcpro2
;
2163 GCPRO2 (overlay
, tail
);
2166 for (tail
= current_buffer
->overlays_before
;
2168 tail
= XCONS (tail
)->cdr
)
2170 int startpos
, endpos
;
2171 Lisp_Object ostart
, oend
;
2173 overlay
= XCONS (tail
)->car
;
2175 ostart
= OVERLAY_START (overlay
);
2176 oend
= OVERLAY_END (overlay
);
2177 endpos
= OVERLAY_POSITION (oend
);
2178 if (XFASTINT (start
) > endpos
)
2180 startpos
= OVERLAY_POSITION (ostart
);
2181 if (XFASTINT (end
) == startpos
&& insertion
)
2183 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2186 /* Copy TAIL in case the hook recenters the overlay lists. */
2188 tail
= Fcopy_sequence (tail
);
2190 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2193 if (XFASTINT (start
) == endpos
&& insertion
)
2195 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2199 tail
= Fcopy_sequence (tail
);
2201 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2204 /* Test for intersecting intervals. This does the right thing
2205 for both insertion and deletion. */
2206 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2208 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2212 tail
= Fcopy_sequence (tail
);
2214 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2220 for (tail
= current_buffer
->overlays_after
;
2222 tail
= XCONS (tail
)->cdr
)
2224 int startpos
, endpos
;
2225 Lisp_Object ostart
, oend
;
2227 overlay
= XCONS (tail
)->car
;
2229 ostart
= OVERLAY_START (overlay
);
2230 oend
= OVERLAY_END (overlay
);
2231 startpos
= OVERLAY_POSITION (ostart
);
2232 endpos
= OVERLAY_POSITION (oend
);
2233 if (XFASTINT (end
) < startpos
)
2235 if (XFASTINT (end
) == startpos
&& insertion
)
2237 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
2241 tail
= Fcopy_sequence (tail
);
2243 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2246 if (XFASTINT (start
) == endpos
&& insertion
)
2248 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
2252 tail
= Fcopy_sequence (tail
);
2254 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2257 /* Test for intersecting intervals. This does the right thing
2258 for both insertion and deletion. */
2259 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
2261 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
2265 tail
= Fcopy_sequence (tail
);
2267 call_overlay_mod_hooks (prop
, overlay
, start
, end
);
2276 call_overlay_mod_hooks (list
, overlay
, start
, end
)
2277 Lisp_Object list
, overlay
, start
, end
;
2279 struct gcpro gcpro1
;
2281 while (!NILP (list
))
2283 call3 (Fcar (list
), overlay
, start
, end
);
2289 /* Somebody has tried to store NEWVAL into the buffer-local slot with
2290 offset XUINT (valcontents), and NEWVAL has an unacceptable type. */
2292 buffer_slot_type_mismatch (valcontents
, newval
)
2293 Lisp_Object valcontents
, newval
;
2295 unsigned int offset
= XUINT (valcontents
);
2296 unsigned char *symbol_name
=
2297 (XSYMBOL (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_symbols
))
2301 switch (XINT (*(Lisp_Object
*)(offset
+ (char *)&buffer_local_types
)))
2303 case Lisp_Int
: type_name
= "integers"; break;
2304 case Lisp_String
: type_name
= "strings"; break;
2305 case Lisp_Marker
: type_name
= "markers"; break;
2306 case Lisp_Symbol
: type_name
= "symbols"; break;
2307 case Lisp_Cons
: type_name
= "lists"; break;
2308 case Lisp_Vector
: type_name
= "vectors"; break;
2313 error ("only %s should be stored in the buffer-local variable %s",
2314 type_name
, symbol_name
);
2319 register Lisp_Object tem
;
2321 /* Make sure all markable slots in buffer_defaults
2322 are initialized reasonably, so mark_buffer won't choke. */
2323 reset_buffer (&buffer_defaults
);
2324 reset_buffer (&buffer_local_symbols
);
2325 XSET (Vbuffer_defaults
, Lisp_Buffer
, &buffer_defaults
);
2326 XSET (Vbuffer_local_symbols
, Lisp_Buffer
, &buffer_local_symbols
);
2328 /* Set up the default values of various buffer slots. */
2329 /* Must do these before making the first buffer! */
2331 /* real setup is done in loaddefs.el */
2332 buffer_defaults
.mode_line_format
= build_string ("%-");
2333 buffer_defaults
.abbrev_mode
= Qnil
;
2334 buffer_defaults
.overwrite_mode
= Qnil
;
2335 buffer_defaults
.case_fold_search
= Qt
;
2336 buffer_defaults
.auto_fill_function
= Qnil
;
2337 buffer_defaults
.selective_display
= Qnil
;
2339 buffer_defaults
.selective_display_ellipses
= Qt
;
2341 buffer_defaults
.abbrev_table
= Qnil
;
2342 buffer_defaults
.display_table
= Qnil
;
2343 buffer_defaults
.undo_list
= Qnil
;
2344 buffer_defaults
.mark_active
= Qnil
;
2345 buffer_defaults
.overlays_before
= Qnil
;
2346 buffer_defaults
.overlays_after
= Qnil
;
2347 XFASTINT (buffer_defaults
.overlay_center
) = 1;
2349 XFASTINT (buffer_defaults
.tab_width
) = 8;
2350 buffer_defaults
.truncate_lines
= Qnil
;
2351 buffer_defaults
.ctl_arrow
= Qt
;
2354 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
2356 XFASTINT (buffer_defaults
.fill_column
) = 70;
2357 XFASTINT (buffer_defaults
.left_margin
) = 0;
2359 /* Assign the local-flags to the slots that have default values.
2360 The local flag is a bit that is used in the buffer
2361 to say that it has its own local value for the slot.
2362 The local flag bits are in the local_var_flags slot of the buffer. */
2364 /* Nothing can work if this isn't true */
2365 if (sizeof (int) != sizeof (Lisp_Object
)) abort ();
2367 /* 0 means not a lisp var, -1 means always local, else mask */
2368 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
2369 XFASTINT (buffer_local_flags
.filename
) = -1;
2370 XFASTINT (buffer_local_flags
.directory
) = -1;
2371 XFASTINT (buffer_local_flags
.backed_up
) = -1;
2372 XFASTINT (buffer_local_flags
.save_length
) = -1;
2373 XFASTINT (buffer_local_flags
.auto_save_file_name
) = -1;
2374 XFASTINT (buffer_local_flags
.read_only
) = -1;
2375 XFASTINT (buffer_local_flags
.major_mode
) = -1;
2376 XFASTINT (buffer_local_flags
.mode_name
) = -1;
2377 XFASTINT (buffer_local_flags
.undo_list
) = -1;
2378 XFASTINT (buffer_local_flags
.mark_active
) = -1;
2380 XFASTINT (buffer_local_flags
.mode_line_format
) = 1;
2381 XFASTINT (buffer_local_flags
.abbrev_mode
) = 2;
2382 XFASTINT (buffer_local_flags
.overwrite_mode
) = 4;
2383 XFASTINT (buffer_local_flags
.case_fold_search
) = 8;
2384 XFASTINT (buffer_local_flags
.auto_fill_function
) = 0x10;
2385 XFASTINT (buffer_local_flags
.selective_display
) = 0x20;
2387 XFASTINT (buffer_local_flags
.selective_display_ellipses
) = 0x40;
2389 XFASTINT (buffer_local_flags
.tab_width
) = 0x80;
2390 XFASTINT (buffer_local_flags
.truncate_lines
) = 0x100;
2391 XFASTINT (buffer_local_flags
.ctl_arrow
) = 0x200;
2392 XFASTINT (buffer_local_flags
.fill_column
) = 0x400;
2393 XFASTINT (buffer_local_flags
.left_margin
) = 0x800;
2394 XFASTINT (buffer_local_flags
.abbrev_table
) = 0x1000;
2395 XFASTINT (buffer_local_flags
.display_table
) = 0x2000;
2396 XFASTINT (buffer_local_flags
.syntax_table
) = 0x8000;
2398 XFASTINT (buffer_local_flags
.buffer_file_type
) = 0x4000;
2401 Vbuffer_alist
= Qnil
;
2405 QSFundamental
= build_string ("Fundamental");
2407 Qfundamental_mode
= intern ("fundamental-mode");
2408 buffer_defaults
.major_mode
= Qfundamental_mode
;
2410 Qmode_class
= intern ("mode-class");
2412 Qprotected_field
= intern ("protected-field");
2414 Qpermanent_local
= intern ("permanent-local");
2416 Qkill_buffer_hook
= intern ("kill-buffer-hook");
2418 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
2419 /* super-magic invisible buffer */
2420 Vbuffer_alist
= Qnil
;
2422 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2427 char buf
[MAXPATHLEN
+1];
2429 struct stat dotstat
, pwdstat
;
2432 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
2434 /* If PWD is accurate, use it instead of calling getwd. This is faster
2435 when PWD is right, and may avoid a fatal error. */
2436 if ((pwd
= getenv ("PWD")) != 0 && *pwd
== '/'
2437 && stat (pwd
, &pwdstat
) == 0
2438 && stat (".", &dotstat
) == 0
2439 && dotstat
.st_ino
== pwdstat
.st_ino
2440 && dotstat
.st_dev
== pwdstat
.st_dev
2441 && strlen (pwd
) < MAXPATHLEN
)
2443 else if (getwd (buf
) == 0)
2444 fatal ("`getwd' failed: %s.\n", buf
);
2447 /* Maybe this should really use some standard subroutine
2448 whose definition is filename syntax dependent. */
2449 if (buf
[strlen (buf
) - 1] != '/')
2451 #endif /* not VMS */
2452 current_buffer
->directory
= build_string (buf
);
2454 temp
= get_minibuffer (0);
2455 XBUFFER (temp
)->directory
= current_buffer
->directory
;
2458 /* initialize the buffer routines */
2461 extern Lisp_Object Qdisabled
;
2463 staticpro (&Vbuffer_defaults
);
2464 staticpro (&Vbuffer_local_symbols
);
2465 staticpro (&Qfundamental_mode
);
2466 staticpro (&Qmode_class
);
2467 staticpro (&QSFundamental
);
2468 staticpro (&Vbuffer_alist
);
2469 staticpro (&Qprotected_field
);
2470 staticpro (&Qpermanent_local
);
2471 staticpro (&Qkill_buffer_hook
);
2472 staticpro (&Qoverlayp
);
2473 staticpro (&Qmodification_hooks
);
2474 Qmodification_hooks
= intern ("modification-hooks");
2475 staticpro (&Qinsert_in_front_hooks
);
2476 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
2477 staticpro (&Qinsert_behind_hooks
);
2478 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
2479 staticpro (&Qget_file_buffer
);
2480 Qget_file_buffer
= intern ("get-file-buffer");
2481 Qpriority
= intern ("priority");
2482 staticpro (&Qpriority
);
2483 Qwindow
= intern ("window");
2484 staticpro (&Qwindow
);
2486 Qoverlayp
= intern ("overlayp");
2488 Fput (Qprotected_field
, Qerror_conditions
,
2489 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
2490 Fput (Qprotected_field
, Qerror_message
,
2491 build_string ("Attempt to modify a protected field"));
2493 /* All these use DEFVAR_LISP_NOPRO because the slots in
2494 buffer_defaults will all be marked via Vbuffer_defaults. */
2496 DEFVAR_LISP_NOPRO ("default-mode-line-format",
2497 &buffer_defaults
.mode_line_format
,
2498 "Default value of `mode-line-format' for buffers that don't override it.\n\
2499 This is the same as (default-value 'mode-line-format).");
2501 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
2502 &buffer_defaults
.abbrev_mode
,
2503 "Default value of `abbrev-mode' for buffers that do not override it.\n\
2504 This is the same as (default-value 'abbrev-mode).");
2506 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
2507 &buffer_defaults
.ctl_arrow
,
2508 "Default value of `ctl-arrow' for buffers that do not override it.\n\
2509 This is the same as (default-value 'ctl-arrow).");
2511 DEFVAR_LISP_NOPRO ("default-truncate-lines",
2512 &buffer_defaults
.truncate_lines
,
2513 "Default value of `truncate-lines' for buffers that do not override it.\n\
2514 This is the same as (default-value 'truncate-lines).");
2516 DEFVAR_LISP_NOPRO ("default-fill-column",
2517 &buffer_defaults
.fill_column
,
2518 "Default value of `fill-column' for buffers that do not override it.\n\
2519 This is the same as (default-value 'fill-column).");
2521 DEFVAR_LISP_NOPRO ("default-left-margin",
2522 &buffer_defaults
.left_margin
,
2523 "Default value of `left-margin' for buffers that do not override it.\n\
2524 This is the same as (default-value 'left-margin).");
2526 DEFVAR_LISP_NOPRO ("default-tab-width",
2527 &buffer_defaults
.tab_width
,
2528 "Default value of `tab-width' for buffers that do not override it.\n\
2529 This is the same as (default-value 'tab-width).");
2531 DEFVAR_LISP_NOPRO ("default-case-fold-search",
2532 &buffer_defaults
.case_fold_search
,
2533 "Default value of `case-fold-search' for buffers that don't override it.\n\
2534 This is the same as (default-value 'case-fold-search).");
2537 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
2538 &buffer_defaults
.buffer_file_type
,
2539 "Default file type for buffers that do not override it.\n\
2540 This is the same as (default-value 'buffer-file-type).\n\
2541 The file type is nil for text, t for binary.");
2544 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
2547 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
2548 But make-docfile finds it!
2549 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
2551 "Template for displaying mode line for current buffer.\n\
2552 Each buffer has its own value of this variable.\n\
2553 Value may be a string, a symbol or a list or cons cell.\n\
2554 For a symbol, its value is used (but it is ignored if t or nil).\n\
2555 A string appearing directly as the value of a symbol is processed verbatim\n\
2556 in that the %-constructs below are not recognized.\n\
2557 For a list whose car is a symbol, the symbol's value is taken,\n\
2558 and if that is non-nil, the cadr of the list is processed recursively.\n\
2559 Otherwise, the caddr of the list (if there is one) is processed.\n\
2560 For a list whose car is a string or list, each element is processed\n\
2561 recursively and the results are effectively concatenated.\n\
2562 For a list whose car is an integer, the cdr of the list is processed\n\
2563 and padded (if the number is positive) or truncated (if negative)\n\
2564 to the width specified by that number.\n\
2565 A string is printed verbatim in the mode line except for %-constructs:\n\
2566 (%-constructs are allowed when the string is the entire mode-line-format\n\
2567 or when it is found in a cons-cell or a list)\n\
2568 %b -- print buffer name. %f -- print visited file name.\n\
2569 %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
2570 %s -- print process status. %l -- print the current line number.\n\
2571 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
2572 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
2573 or print Bottom or All.\n\
2574 %n -- print Narrow if appropriate.\n\
2575 %t -- print T if files is text, B if binary.\n\
2576 %[ -- print one [ for each recursive editing level. %] similar.\n\
2577 %% -- print %. %- -- print infinitely many dashes.\n\
2578 Decimal digits after the % specify field width to which to pad.");
2581 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
2582 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
2583 nil here means use current buffer's major mode.");
2585 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
2586 make_number (Lisp_Symbol
),
2587 "Symbol for current buffer's major mode.");
2589 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
2590 make_number (Lisp_String
),
2591 "Pretty name of current buffer's major mode (a string).");
2593 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
2594 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
2595 Automatically becomes buffer-local when set in any fashion.");
2597 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
2599 "*Non-nil if searches should ignore case.\n\
2600 Automatically becomes buffer-local when set in any fashion.");
2602 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
2603 make_number (Lisp_Int
),
2604 "*Column beyond which automatic line-wrapping should happen.\n\
2605 Automatically becomes buffer-local when set in any fashion.");
2607 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
2608 make_number (Lisp_Int
),
2609 "*Column for the default indent-line-function to indent to.\n\
2610 Linefeed indents to this column in Fundamental mode.\n\
2611 Automatically becomes buffer-local when set in any fashion.");
2613 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
2614 make_number (Lisp_Int
),
2615 "*Distance between tab stops (for display of tab characters), in columns.\n\
2616 Automatically becomes buffer-local when set in any fashion.");
2618 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
2619 "*Non-nil means display control chars with uparrow.\n\
2620 Nil means use backslash and octal digits.\n\
2621 Automatically becomes buffer-local when set in any fashion.\n\
2622 This variable does not apply to characters whose display is specified\n\
2623 in the current display table (if there is one).");
2625 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
2626 "*Non-nil means do not display continuation lines;\n\
2627 give each line of text one screen line.\n\
2628 Automatically becomes buffer-local when set in any fashion.\n\
2630 Note that this is overridden by the variable\n\
2631 `truncate-partial-width-windows' if that variable is non-nil\n\
2632 and this buffer is not full-frame width.");
2635 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
2637 "*If visited file is text, nil; otherwise, t.");
2640 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
2641 make_number (Lisp_String
),
2642 "Name of default directory of current buffer. Should end with slash.\n\
2643 Each buffer has its own value of this variable.");
2645 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
2647 "Function called (if non-nil) to perform auto-fill.\n\
2648 It is called after self-inserting a space at a column beyond `fill-column'.\n\
2649 Each buffer has its own value of this variable.\n\
2650 NOTE: This variable is not an ordinary hook;\n\
2651 It may not be a list of functions.");
2653 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
2654 make_number (Lisp_String
),
2655 "Name of file visited in current buffer, or nil if not visiting a file.\n\
2656 Each buffer has its own value of this variable.");
2658 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
2659 ¤t_buffer
->auto_save_file_name
,
2660 make_number (Lisp_String
),
2661 "Name of file for auto-saving current buffer,\n\
2662 or nil if buffer should not be auto-saved.\n\
2663 Each buffer has its own value of this variable.");
2665 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
2666 "Non-nil if this buffer is read-only.\n\
2667 Each buffer has its own value of this variable.");
2669 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
2670 "Non-nil if this buffer's file has been backed up.\n\
2671 Backing up is done before the first time the file is saved.\n\
2672 Each buffer has its own value of this variable.");
2674 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
2675 make_number (Lisp_Int
),
2676 "Length of current buffer when last read in, saved or auto-saved.\n\
2678 Each buffer has its own value of this variable.");
2680 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
2682 "Non-nil enables selective display:\n\
2683 Integer N as value means display only lines\n\
2684 that start with less than n columns of space.\n\
2685 A value of t means, after a ^M, all the rest of the line is invisible.\n\
2686 Then ^M's in the file are written into files as newlines.\n\n\
2687 Automatically becomes buffer-local when set in any fashion.");
2690 DEFVAR_PER_BUFFER ("selective-display-ellipses",
2691 ¤t_buffer
->selective_display_ellipses
,
2693 "t means display ... on previous line when a line is invisible.\n\
2694 Automatically becomes buffer-local when set in any fashion.");
2697 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
2698 "Non-nil if self-insertion should replace existing text.\n\
2699 If non-nil and not `overwrite-mode-binary', self-insertion still\n\
2700 inserts at the end of a line, and inserts when point is before a tab,\n\
2701 until the tab is filled in.\n\
2702 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
2703 Automatically becomes buffer-local when set in any fashion.");
2705 #if 0 /* The doc string is too long for some compilers,
2706 but make-docfile can find it in this comment. */
2707 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2709 "Display table that controls display of the contents of current buffer.\n\
2710 Automatically becomes buffer-local when set in any fashion.\n\
2711 The display table is a vector created with `make-display-table'.\n\
2712 The first 256 elements control how to display each possible text character.\n\
2713 Each value should be a vector of characters or nil;\n\
2714 nil means display the character in the default fashion.\n\
2715 The remaining five elements control the display of\n\
2716 the end of a truncated screen line (element 256, a single character);\n\
2717 the end of a continued line (element 257, a single character);\n\
2718 the escape character used to display character codes in octal\n\
2719 (element 258, a single character);\n\
2720 the character used as an arrow for control characters (element 259,\n\
2721 a single character);\n\
2722 the decoration indicating the presence of invisible lines (element 260,\n\
2723 a vector of characters).\n\
2724 If this variable is nil, the value of `standard-display-table' is used.\n\
2725 Each window can have its own, overriding display table.");
2727 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
2730 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
2733 DEFVAR_LISP ("before-change-function", &Vbefore_change_function
,
2734 "Function to call before each text change.\n\
2735 Two arguments are passed to the function: the positions of\n\
2736 the beginning and end of the range of old text to be changed.\n\
2737 \(For an insertion, the beginning and end are at the same place.)\n\
2738 No information is given about the length of the text after the change.\n\
2740 Buffer changes made while executing the `before-change-function'\n\
2741 don't call any before-change or after-change functions.\n\
2742 That's because these variables are temporarily set to nil.\n\
2743 As a result, a hook function cannot straightforwardly alter the value of\n\
2744 these variables. See the Emacs Lisp manual for a way of\n\
2745 accomplishing an equivalent result by using other variables.");
2746 Vbefore_change_function
= Qnil
;
2748 DEFVAR_LISP ("after-change-function", &Vafter_change_function
,
2749 "Function to call after each text change.\n\
2750 Three arguments are passed to the function: the positions of\n\
2751 the beginning and end of the range of changed text,\n\
2752 and the length of the pre-change text replaced by that range.\n\
2753 \(For an insertion, the pre-change length is zero;\n\
2754 for a deletion, that length is the number of characters deleted,\n\
2755 and the post-change beginning and end are at the same place.)\n\
2757 Buffer changes made while executing the `after-change-function'\n\
2758 don't call any before-change or after-change functions.\n\
2759 That's because these variables are temporarily set to nil.\n\
2760 As a result, a hook function cannot straightforwardly alter the value of\n\
2761 these variables. See the Emacs Lisp manual for a way of\n\
2762 accomplishing an equivalent result by using other variables.");
2763 Vafter_change_function
= Qnil
;
2765 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
2766 "List of functions to call before each text change.\n\
2767 Two arguments are passed to each function: the positions of\n\
2768 the beginning and end of the range of old text to be changed.\n\
2769 \(For an insertion, the beginning and end are at the same place.)\n\
2770 No information is given about the length of the text after the change.\n\
2772 Buffer changes made while executing the `before-change-functions'\n\
2773 don't call any before-change or after-change functions.\n\
2774 That's because these variables are temporarily set to nil.\n\
2775 As a result, a hook function cannot straightforwardly alter the value of\n\
2776 these variables. See the Emacs Lisp manual for a way of\n\
2777 accomplishing an equivalent result by using other variables.");
2778 Vbefore_change_functions
= Qnil
;
2780 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
2781 "List of function to call after each text change.\n\
2782 Three arguments are passed to each function: the positions of\n\
2783 the beginning and end of the range of changed text,\n\
2784 and the length of the pre-change text replaced by that range.\n\
2785 \(For an insertion, the pre-change length is zero;\n\
2786 for a deletion, that length is the number of characters deleted,\n\
2787 and the post-change beginning and end are at the same place.)\n\
2789 Buffer changes made while executing the `after-change-functions'\n\
2790 don't call any before-change or after-change functions.\n\
2791 That's because these variables are temporarily set to nil.\n\
2792 As a result, a hook function cannot straightforwardly alter the value of\n\
2793 these variables. See the Emacs Lisp manual for a way of\n\
2794 accomplishing an equivalent result by using other variables.");
2796 Vafter_change_functions
= Qnil
;
2798 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
2799 "A list of functions to call before changing a buffer which is unmodified.\n\
2800 The functions are run using the `run-hooks' function.");
2801 Vfirst_change_hook
= Qnil
;
2802 Qfirst_change_hook
= intern ("first-change-hook");
2803 staticpro (&Qfirst_change_hook
);
2805 #if 0 /* The doc string is too long for some compilers,
2806 but make-docfile can find it in this comment. */
2807 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2808 "List of undo entries in current buffer.\n\
2809 Recent changes come first; older changes follow newer.\n\
2811 An entry (START . END) represents an insertion which begins at\n\
2812 position START and ends at position END.\n\
2814 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
2815 from (abs POSITION). If POSITION is positive, point was at the front\n\
2816 of the text being deleted; if negative, point was at the end.\n\
2818 An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\
2819 previously unmodified. HIGHWORD and LOWWORD are the high and low\n\
2820 16-bit words of the buffer's modification count at the time. If the\n\
2821 modification count of the most recent save is different, this entry is\n\
2824 An entry (nil PROP VAL BEG . END) indicates that a text property\n\
2825 was modified between BEG and END. PROP is the property name,\n\
2826 and VAL is the old value.\n\
2828 An entry of the form POSITION indicates that point was at the buffer\n\
2829 location given by the integer. Undoing an entry of this form places\n\
2830 point at POSITION.\n\
2832 nil marks undo boundaries. The undo command treats the changes\n\
2833 between two undo boundaries as a single step to be undone.\n\
2835 If the value of the variable is t, undo information is not recorded.");
2837 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
2840 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
2841 "Non-nil means the mark and region are currently active in this buffer.\n\
2842 Automatically local in all buffers.");
2844 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
2845 "*Non-nil means deactivate the mark when the buffer contents change.");
2846 Vtransient_mark_mode
= Qnil
;
2848 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
2849 "*Non-nil means disregard read-only status of buffers or characters.\n\
2850 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
2851 text properties. If the value is a list, disregard `buffer-read-only'\n\
2852 and disregard a `read-only' text property if the property value\n\
2853 is a member of the list.");
2854 Vinhibit_read_only
= Qnil
;
2856 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
2857 "List of functions called with no args to query before killing a buffer.");
2858 Vkill_buffer_query_functions
= Qnil
;
2860 defsubr (&Sbuffer_list
);
2861 defsubr (&Sget_buffer
);
2862 defsubr (&Sget_file_buffer
);
2863 defsubr (&Sget_buffer_create
);
2864 defsubr (&Sgenerate_new_buffer_name
);
2865 defsubr (&Sbuffer_name
);
2866 /*defsubr (&Sbuffer_number);*/
2867 defsubr (&Sbuffer_file_name
);
2868 defsubr (&Sbuffer_local_variables
);
2869 defsubr (&Sbuffer_modified_p
);
2870 defsubr (&Sset_buffer_modified_p
);
2871 defsubr (&Sbuffer_modified_tick
);
2872 defsubr (&Srename_buffer
);
2873 defsubr (&Sother_buffer
);
2874 defsubr (&Sbuffer_disable_undo
);
2875 defsubr (&Sbuffer_enable_undo
);
2876 defsubr (&Skill_buffer
);
2877 defsubr (&Serase_buffer
);
2878 defsubr (&Sswitch_to_buffer
);
2879 defsubr (&Spop_to_buffer
);
2880 defsubr (&Scurrent_buffer
);
2881 defsubr (&Sset_buffer
);
2882 defsubr (&Sbarf_if_buffer_read_only
);
2883 defsubr (&Sbury_buffer
);
2884 defsubr (&Slist_buffers
);
2885 defsubr (&Skill_all_local_variables
);
2887 defsubr (&Soverlayp
);
2888 defsubr (&Smake_overlay
);
2889 defsubr (&Sdelete_overlay
);
2890 defsubr (&Smove_overlay
);
2891 defsubr (&Soverlay_start
);
2892 defsubr (&Soverlay_end
);
2893 defsubr (&Soverlay_buffer
);
2894 defsubr (&Soverlay_properties
);
2895 defsubr (&Soverlays_at
);
2896 defsubr (&Snext_overlay_change
);
2897 defsubr (&Soverlay_recenter
);
2898 defsubr (&Soverlay_lists
);
2899 defsubr (&Soverlay_get
);
2900 defsubr (&Soverlay_put
);
2905 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
2906 initial_define_key (control_x_map
, 'k', "kill-buffer");
2907 initial_define_key (control_x_map
, Ctl ('B'), "list-buffers");
2909 /* This must not be in syms_of_buffer, because Qdisabled is not
2910 initialized when that function gets called. */
2911 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);