1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000
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, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
32 /* in 4.1, param.h fails to define this. */
33 #define MAXPATHLEN 1024
34 #endif /* not MAXPATHLEN */
40 #include "intervals.h"
45 #include "region-cache.h"
47 #include "blockinput.h"
50 struct buffer
*current_buffer
; /* the current buffer */
52 /* First buffer in chain of all buffers (in reverse order of creation).
53 Threaded through ->next. */
55 struct buffer
*all_buffers
;
57 /* This structure holds the default values of the buffer-local variables
58 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
59 The default value occupies the same slot in this structure
60 as an individual buffer's value occupies in that buffer.
61 Setting the default value also goes through the alist of buffers
62 and stores into each buffer that does not say it has a local value. */
64 struct buffer buffer_defaults
;
66 /* A Lisp_Object pointer to the above, used for staticpro */
68 static Lisp_Object Vbuffer_defaults
;
70 /* This structure marks which slots in a buffer have corresponding
71 default values in buffer_defaults.
72 Each such slot has a nonzero value in this structure.
73 The value has only one nonzero bit.
75 When a buffer has its own local value for a slot,
76 the entry for that slot (found in the same slot in this structure)
77 is turned on in the buffer's local_flags array.
79 If a slot in this structure is -1, then even though there may
80 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
81 and the corresponding slot in buffer_defaults is not used.
83 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
84 but there is a default value which is copied into each buffer.
86 If a slot in this structure is negative, then even though there may
87 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
88 and the corresponding slot in buffer_defaults is not used.
90 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
91 zero, that is a bug */
93 struct buffer buffer_local_flags
;
95 /* This structure holds the names of symbols whose values may be
96 buffer-local. It is indexed and accessed in the same way as the above. */
98 struct buffer buffer_local_symbols
;
99 /* A Lisp_Object pointer to the above, used for staticpro */
100 static Lisp_Object Vbuffer_local_symbols
;
102 /* This structure holds the required types for the values in the
103 buffer-local slots. If a slot contains Qnil, then the
104 corresponding buffer slot may contain a value of any type. If a
105 slot contains an integer, then prospective values' tags must be
106 equal to that integer (except nil is always allowed).
107 When a tag does not match, the function
108 buffer_slot_type_mismatch will signal an error.
110 If a slot here contains -1, the corresponding variable is read-only. */
111 struct buffer buffer_local_types
;
113 /* Flags indicating which built-in buffer-local variables
114 are permanent locals. */
115 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
117 /* Number of per-buffer variables used. */
119 int last_per_buffer_idx
;
121 Lisp_Object
Fset_buffer ();
122 void set_buffer_internal ();
123 void set_buffer_internal_1 ();
124 static void call_overlay_mod_hooks ();
125 static void swap_out_buffer_local_variables ();
126 static void reset_buffer_local_variables ();
128 /* Alist of all buffer names vs the buffers. */
129 /* This used to be a variable, but is no longer,
130 to prevent lossage due to user rplac'ing this alist or its elements. */
131 Lisp_Object Vbuffer_alist
;
133 /* Functions to call before and after each text change. */
134 Lisp_Object Vbefore_change_functions
;
135 Lisp_Object Vafter_change_functions
;
137 Lisp_Object Vtransient_mark_mode
;
139 /* t means ignore all read-only text properties.
140 A list means ignore such a property if its value is a member of the list.
141 Any non-nil value means ignore buffer-read-only. */
142 Lisp_Object Vinhibit_read_only
;
144 /* List of functions to call that can query about killing a buffer.
145 If any of these functions returns nil, we don't kill it. */
146 Lisp_Object Vkill_buffer_query_functions
;
148 /* List of functions to call before changing an unmodified buffer. */
149 Lisp_Object Vfirst_change_hook
;
151 Lisp_Object Qfirst_change_hook
;
152 Lisp_Object Qbefore_change_functions
;
153 Lisp_Object Qafter_change_functions
;
155 /* If nonzero, all modification hooks are suppressed. */
156 int inhibit_modification_hooks
;
158 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
160 Lisp_Object Qprotected_field
;
162 Lisp_Object QSFundamental
; /* A string "Fundamental" */
164 Lisp_Object Qkill_buffer_hook
;
166 Lisp_Object Qget_file_buffer
;
168 Lisp_Object Qoverlayp
;
170 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
172 Lisp_Object Qmodification_hooks
;
173 Lisp_Object Qinsert_in_front_hooks
;
174 Lisp_Object Qinsert_behind_hooks
;
176 /* For debugging; temporary. See set_buffer_internal. */
177 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
184 error ("No buffer named %s", XSTRING (spec
)->data
);
185 error ("Invalid buffer argument");
188 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
189 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
190 Value is nil if OBJECT is not a buffer or if it has been killed.")
194 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
198 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
199 "Return a list of all existing live buffers.\n\
200 If the optional arg FRAME is a frame, we return that frame's buffer list.")
204 Lisp_Object framelist
, general
;
205 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
211 CHECK_FRAME (frame
, 1);
213 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
215 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
217 while (! NILP (tail
))
219 general
= Fdelq (XCAR (tail
), general
);
222 return nconc2 (framelist
, general
);
228 /* Like Fassoc, but use Fstring_equal to compare
229 (which ignores text properties),
230 and don't ever QUIT. */
233 assoc_ignore_text_properties (key
, list
)
234 register Lisp_Object key
;
237 register Lisp_Object tail
;
238 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
240 register Lisp_Object elt
, tem
;
242 tem
= Fstring_equal (Fcar (elt
), key
);
249 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
250 "Return the buffer named NAME (a string).\n\
251 If there is no live buffer named NAME, return nil.\n\
252 NAME may also be a buffer; if so, the value is that buffer.")
254 register Lisp_Object name
;
258 CHECK_STRING (name
, 0);
260 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
263 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
264 "Return the buffer visiting file FILENAME (a string).\n\
265 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
266 If there is no such live buffer, return nil.\n\
267 See also `find-buffer-visiting'.")
269 register Lisp_Object filename
;
271 register Lisp_Object tail
, buf
, tem
;
274 CHECK_STRING (filename
, 0);
275 filename
= Fexpand_file_name (filename
, Qnil
);
277 /* If the file name has special constructs in it,
278 call the corresponding file handler. */
279 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
281 return call2 (handler
, Qget_file_buffer
, filename
);
283 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
285 buf
= Fcdr (XCAR (tail
));
286 if (!BUFFERP (buf
)) continue;
287 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
288 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
296 get_truename_buffer (filename
)
297 register Lisp_Object filename
;
299 register Lisp_Object tail
, buf
, tem
;
301 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
303 buf
= Fcdr (XCAR (tail
));
304 if (!BUFFERP (buf
)) continue;
305 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
306 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
313 /* Incremented for each buffer created, to assign the buffer number. */
316 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
317 "Return the buffer named NAME, or create such a buffer and return it.\n\
318 A new buffer is created if there is no live buffer named NAME.\n\
319 If NAME starts with a space, the new buffer does not keep undo information.\n\
320 If NAME is a buffer instead of a string, then it is the value returned.\n\
321 The value is never nil.")
323 register Lisp_Object name
;
325 register Lisp_Object buf
;
326 register struct buffer
*b
;
328 buf
= Fget_buffer (name
);
332 if (XSTRING (name
)->size
== 0)
333 error ("Empty string for buffer name is not allowed");
335 b
= (struct buffer
*) allocate_buffer ();
337 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
339 /* An ordinary buffer uses its own struct buffer_text. */
340 b
->text
= &b
->own_text
;
343 BUF_GAP_SIZE (b
) = 20;
345 /* We allocate extra 1-byte at the tail and keep it always '\0' for
346 anchoring a search. */
347 BUFFER_ALLOC (BUF_BEG_ADDR (b
), (BUF_GAP_SIZE (b
) + 1));
349 if (! BUF_BEG_ADDR (b
))
350 buffer_memory_full ();
358 BUF_GPT_BYTE (b
) = 1;
359 BUF_BEGV_BYTE (b
) = 1;
363 BUF_OVERLAY_MODIFF (b
) = 1;
364 BUF_SAVE_MODIFF (b
) = 1;
365 BUF_INTERVALS (b
) = 0;
366 BUF_UNCHANGED_MODIFIED (b
) = 1;
367 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
368 BUF_END_UNCHANGED (b
) = 0;
369 BUF_BEG_UNCHANGED (b
) = 0;
370 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
372 b
->newline_cache
= 0;
373 b
->width_run_cache
= 0;
374 b
->width_table
= Qnil
;
375 b
->prevent_redisplay_optimizations_p
= 1;
377 /* Put this on the chain of all buffers including killed ones. */
378 b
->next
= all_buffers
;
381 /* An ordinary buffer normally doesn't need markers
382 to handle BEGV and ZV. */
384 b
->begv_marker
= Qnil
;
387 name
= Fcopy_sequence (name
);
388 XSTRING (name
)->intervals
= NULL_INTERVAL
;
391 if (XSTRING (name
)->data
[0] != ' ')
397 reset_buffer_local_variables (b
, 1);
399 /* Put this in the alist of all live buffers. */
401 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
403 b
->mark
= Fmake_marker ();
404 BUF_MARKERS (b
) = Qnil
;
410 /* Clone per-buffer values of buffer FROM.
412 Buffer TO gets the same per-buffer values as FROM, with the
413 following exceptions: (1) TO's name is left untouched, (2) markers
414 are copied and made to refer to TO, and (3) overlay lists are
418 clone_per_buffer_values (from
, to
)
419 struct buffer
*from
, *to
;
421 Lisp_Object to_buffer
;
424 XSETBUFFER (to_buffer
, to
);
426 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
428 offset
+= sizeof (Lisp_Object
))
432 obj
= PER_BUFFER_VALUE (from
, offset
);
435 struct Lisp_Marker
*m
= XMARKER (obj
);
436 obj
= Fmake_marker ();
437 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
438 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
441 PER_BUFFER_VALUE (to
, offset
) = obj
;
444 to
->overlays_after
= Fcopy_sequence (from
->overlays_after
);
445 to
->overlays_before
= Fcopy_sequence (to
->overlays_before
);
446 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
450 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
452 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
453 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
454 BASE-BUFFER should be an existing buffer (or buffer name).\n\
455 NAME should be a string which is not the name of an existing buffer.\n\
456 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,\n\
457 such as major and minor modes, in the indirect buffer.\n\
458 CLONE nil means the indirect buffer's state is reset to default values.")
459 (base_buffer
, name
, clone
)
460 Lisp_Object base_buffer
, name
, clone
;
465 buf
= Fget_buffer (name
);
467 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
469 base_buffer
= Fget_buffer (base_buffer
);
470 if (NILP (base_buffer
))
471 error ("No such buffer: `%s'",
472 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
474 if (XSTRING (name
)->size
== 0)
475 error ("Empty string for buffer name is not allowed");
477 b
= (struct buffer
*) allocate_buffer ();
478 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
480 if (XBUFFER (base_buffer
)->base_buffer
)
481 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
483 b
->base_buffer
= XBUFFER (base_buffer
);
485 /* Use the base buffer's text object. */
486 b
->text
= b
->base_buffer
->text
;
488 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
489 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
490 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
491 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
492 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
493 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
495 b
->newline_cache
= 0;
496 b
->width_run_cache
= 0;
497 b
->width_table
= Qnil
;
499 /* Put this on the chain of all buffers including killed ones. */
500 b
->next
= all_buffers
;
503 name
= Fcopy_sequence (name
);
504 XSTRING (name
)->intervals
= NULL_INTERVAL
;
508 reset_buffer_local_variables (b
, 1);
510 /* Put this in the alist of all live buffers. */
512 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
514 b
->mark
= Fmake_marker ();
517 /* The multibyte status belongs to the base buffer. */
518 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
520 /* Make sure the base buffer has markers for its narrowing. */
521 if (NILP (b
->base_buffer
->pt_marker
))
523 b
->base_buffer
->pt_marker
= Fmake_marker ();
524 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
525 BUF_PT (b
->base_buffer
),
526 BUF_PT_BYTE (b
->base_buffer
));
528 if (NILP (b
->base_buffer
->begv_marker
))
530 b
->base_buffer
->begv_marker
= Fmake_marker ();
531 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
532 BUF_BEGV (b
->base_buffer
),
533 BUF_BEGV_BYTE (b
->base_buffer
));
535 if (NILP (b
->base_buffer
->zv_marker
))
537 b
->base_buffer
->zv_marker
= Fmake_marker ();
538 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
539 BUF_ZV (b
->base_buffer
),
540 BUF_ZV_BYTE (b
->base_buffer
));
541 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
546 /* Give the indirect buffer markers for its narrowing. */
547 b
->pt_marker
= Fmake_marker ();
548 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
549 b
->begv_marker
= Fmake_marker ();
550 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
551 b
->zv_marker
= Fmake_marker ();
552 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
553 XMARKER (b
->zv_marker
)->insertion_type
= 1;
556 clone_per_buffer_values (b
->base_buffer
, b
);
561 /* Reinitialize everything about a buffer except its name and contents
562 and local variables. */
566 register struct buffer
*b
;
569 b
->file_truename
= Qnil
;
570 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
572 XSETFASTINT (b
->save_length
, 0);
573 b
->last_window_start
= 1;
574 /* It is more conservative to start out "changed" than "unchanged". */
576 b
->prevent_redisplay_optimizations_p
= 1;
578 b
->auto_save_modified
= 0;
579 b
->auto_save_failure_time
= -1;
580 b
->auto_save_file_name
= Qnil
;
582 b
->overlays_before
= Qnil
;
583 b
->overlays_after
= Qnil
;
584 XSETFASTINT (b
->overlay_center
, 1);
585 b
->mark_active
= Qnil
;
586 b
->point_before_scroll
= Qnil
;
587 b
->file_format
= Qnil
;
588 b
->last_selected_window
= Qnil
;
589 XSETINT (b
->display_count
, 0);
590 b
->display_time
= Qnil
;
591 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
592 b
->cursor_type
= buffer_defaults
.cursor_type
;
593 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
596 /* Reset buffer B's local variables info.
597 Don't use this on a buffer that has already been in use;
598 it does not treat permanent locals consistently.
599 Instead, use Fkill_all_local_variables.
601 If PERMANENT_TOO is 1, then we reset permanent built-in
602 buffer-local variables. If PERMANENT_TOO is 0,
603 we preserve those. */
606 reset_buffer_local_variables (b
, permanent_too
)
607 register struct buffer
*b
;
613 /* Reset the major mode to Fundamental, together with all the
614 things that depend on the major mode.
615 default-major-mode is handled at a higher level.
616 We ignore it here. */
617 b
->major_mode
= Qfundamental_mode
;
619 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
620 b
->mode_name
= QSFundamental
;
621 b
->minor_modes
= Qnil
;
623 /* If the standard case table has been altered and invalidated,
624 fix up its insides first. */
625 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
626 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
627 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
628 Fset_standard_case_table (Vascii_downcase_table
);
630 b
->downcase_table
= Vascii_downcase_table
;
631 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
632 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
633 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
634 b
->invisibility_spec
= Qt
;
636 b
->buffer_file_type
= Qnil
;
640 b
->sort_table
= XSTRING (Vascii_sort_table
);
641 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
644 /* Reset all (or most) per-buffer variables to their defaults. */
645 b
->local_var_alist
= Qnil
;
646 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
647 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
648 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
650 /* For each slot that has a default value,
651 copy that into the slot. */
653 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
655 offset
+= sizeof (Lisp_Object
))
657 int idx
= PER_BUFFER_IDX (offset
);
660 || buffer_permanent_local_flags
[idx
] == 0))
661 /* Is -2 used anywhere? */
663 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
667 /* We split this away from generate-new-buffer, because rename-buffer
668 and set-visited-file-name ought to be able to use this to really
669 rename the buffer properly. */
671 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
673 "Return a string that is the name of no existing buffer based on NAME.\n\
674 If there is no live buffer named NAME, then return NAME.\n\
675 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
676 until an unused name is found, and then return that name.\n\
677 Optional second argument IGNORE specifies a name that is okay to use\n\
678 \(if it is in the sequence to be tried)\n\
679 even if a buffer with that name exists.")
681 register Lisp_Object name
, ignore
;
683 register Lisp_Object gentemp
, tem
;
687 CHECK_STRING (name
, 0);
689 tem
= Fget_buffer (name
);
696 sprintf (number
, "<%d>", ++count
);
697 gentemp
= concat2 (name
, build_string (number
));
698 tem
= Fstring_equal (gentemp
, ignore
);
701 tem
= Fget_buffer (gentemp
);
708 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
709 "Return the name of BUFFER, as a string.\n\
710 With no argument or nil as argument, return the name of the current buffer.")
712 register Lisp_Object buffer
;
715 return current_buffer
->name
;
716 CHECK_BUFFER (buffer
, 0);
717 return XBUFFER (buffer
)->name
;
720 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
721 "Return name of file BUFFER is visiting, or nil if none.\n\
722 No argument or nil as argument means use the current buffer.")
724 register Lisp_Object buffer
;
727 return current_buffer
->filename
;
728 CHECK_BUFFER (buffer
, 0);
729 return XBUFFER (buffer
)->filename
;
732 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
734 "Return the base buffer of indirect buffer BUFFER.\n\
735 If BUFFER is not indirect, return nil.")
737 register Lisp_Object buffer
;
740 Lisp_Object base_buffer
;
743 base
= current_buffer
->base_buffer
;
746 CHECK_BUFFER (buffer
, 0);
747 base
= XBUFFER (buffer
)->base_buffer
;
752 XSETBUFFER (base_buffer
, base
);
756 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
757 Sbuffer_local_variables
, 0, 1, 0,
758 "Return an alist of variables that are buffer-local in BUFFER.\n\
759 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
760 For a symbol that is locally unbound, just the symbol appears in the value.\n\
761 Note that storing new VALUEs in these elements doesn't change the variables.\n\
762 No argument or nil as argument means use current buffer as BUFFER.")
764 register Lisp_Object buffer
;
766 register struct buffer
*buf
;
767 register Lisp_Object result
;
770 buf
= current_buffer
;
773 CHECK_BUFFER (buffer
, 0);
774 buf
= XBUFFER (buffer
);
780 register Lisp_Object tail
;
781 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
783 Lisp_Object val
, elt
;
787 /* Reference each variable in the alist in buf.
788 If inquiring about the current buffer, this gets the current values,
789 so store them into the alist so the alist is up to date.
790 If inquiring about some other buffer, this swaps out any values
791 for that buffer, making the alist up to date automatically. */
792 val
= find_symbol_value (XCAR (elt
));
793 /* Use the current buffer value only if buf is the current buffer. */
794 if (buf
!= current_buffer
)
797 /* If symbol is unbound, put just the symbol in the list. */
798 if (EQ (val
, Qunbound
))
799 result
= Fcons (XCAR (elt
), result
);
800 /* Otherwise, put (symbol . value) in the list. */
802 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
806 /* Add on all the variables stored in special slots. */
810 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
811 offset
< sizeof (struct buffer
);
812 /* sizeof EMACS_INT == sizeof Lisp_Object */
813 offset
+= (sizeof (EMACS_INT
)))
815 idx
= PER_BUFFER_IDX (offset
);
816 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
817 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
818 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
819 PER_BUFFER_VALUE (buf
, offset
)),
828 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
830 "Return t if BUFFER was modified since its file was last read or saved.\n\
831 No argument or nil as argument means use current buffer as BUFFER.")
833 register Lisp_Object buffer
;
835 register struct buffer
*buf
;
837 buf
= current_buffer
;
840 CHECK_BUFFER (buffer
, 0);
841 buf
= XBUFFER (buffer
);
844 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
847 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
849 "Mark current buffer as modified or unmodified according to FLAG.\n\
850 A non-nil FLAG means mark the buffer modified.")
852 register Lisp_Object flag
;
854 register int already
;
855 register Lisp_Object fn
;
856 Lisp_Object buffer
, window
;
858 #ifdef CLASH_DETECTION
859 /* If buffer becoming modified, lock the file.
860 If buffer becoming unmodified, unlock the file. */
862 fn
= current_buffer
->file_truename
;
863 /* Test buffer-file-name so that binding it to nil is effective. */
864 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
866 already
= SAVE_MODIFF
< MODIFF
;
867 if (!already
&& !NILP (flag
))
869 else if (already
&& NILP (flag
))
872 #endif /* CLASH_DETECTION */
874 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
876 /* Set update_mode_lines only if buffer is displayed in some window.
877 Packages like jit-lock or lazy-lock preserve a buffer's modified
878 state by recording/restoring the state around blocks of code.
879 Setting update_mode_lines makes redisplay consider all windows
880 (on all frames). Stealth fontification of buffers not displayed
881 would incur additional redisplay costs if we'd set
882 update_modes_lines unconditionally.
884 Ideally, I think there should be another mechanism for fontifying
885 buffers without "modifying" buffers, or redisplay should be
886 smarter about updating the `*' in mode lines. --gerd */
887 XSETBUFFER (buffer
, current_buffer
);
888 window
= Fget_buffer_window (buffer
, Qt
);
889 if (WINDOWP (window
))
895 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
896 Srestore_buffer_modified_p
, 1, 1, 0,
897 "Like `set-buffer-modified-p', with a differences concerning redisplay.\n\
898 It is not ensured that mode lines will be updated to show the modified\n\
899 state of the current buffer. Use with care.")
903 #ifdef CLASH_DETECTION
906 /* If buffer becoming modified, lock the file.
907 If buffer becoming unmodified, unlock the file. */
909 fn
= current_buffer
->file_truename
;
910 /* Test buffer-file-name so that binding it to nil is effective. */
911 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
913 int already
= SAVE_MODIFF
< MODIFF
;
914 if (!already
&& !NILP (flag
))
916 else if (already
&& NILP (flag
))
919 #endif /* CLASH_DETECTION */
921 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
925 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
927 "Return BUFFER's tick counter, incremented for each change in text.\n\
928 Each buffer has a tick counter which is incremented each time the text in\n\
929 that buffer is changed. It wraps around occasionally.\n\
930 No argument or nil as argument means use current buffer as BUFFER.")
932 register Lisp_Object buffer
;
934 register struct buffer
*buf
;
936 buf
= current_buffer
;
939 CHECK_BUFFER (buffer
, 0);
940 buf
= XBUFFER (buffer
);
943 return make_number (BUF_MODIFF (buf
));
946 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
947 "sRename buffer (to new name): \nP",
948 "Change current buffer's name to NEWNAME (a string).\n\
949 If second arg UNIQUE is nil or omitted, it is an error if a\n\
950 buffer named NEWNAME already exists.\n\
951 If UNIQUE is non-nil, come up with a new name using\n\
952 `generate-new-buffer-name'.\n\
953 Interactively, you can set UNIQUE with a prefix argument.\n\
954 We return the name we actually gave the buffer.\n\
955 This does not change the name of the visited file (if any).")
957 register Lisp_Object newname
, unique
;
959 register Lisp_Object tem
, buf
;
961 CHECK_STRING (newname
, 0);
963 if (XSTRING (newname
)->size
== 0)
964 error ("Empty string is invalid as a buffer name");
966 tem
= Fget_buffer (newname
);
969 /* Don't short-circuit if UNIQUE is t. That is a useful way to
970 rename the buffer automatically so you can create another
971 with the original name. It makes UNIQUE equivalent to
972 (rename-buffer (generate-new-buffer-name NEWNAME)). */
973 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
974 return current_buffer
->name
;
976 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
978 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
981 current_buffer
->name
= newname
;
983 /* Catch redisplay's attention. Unless we do this, the mode lines for
984 any windows displaying current_buffer will stay unchanged. */
987 XSETBUFFER (buf
, current_buffer
);
988 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
989 if (NILP (current_buffer
->filename
)
990 && !NILP (current_buffer
->auto_save_file_name
))
991 call0 (intern ("rename-auto-save-file"));
992 /* Refetch since that last call may have done GC. */
993 return current_buffer
->name
;
996 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
997 "Return most recently selected buffer other than BUFFER.\n\
998 Buffers not visible in windows are preferred to visible buffers,\n\
999 unless optional second argument VISIBLE-OK is non-nil.\n\
1000 If the optional third argument FRAME is non-nil, use that frame's\n\
1001 buffer list instead of the selected frame's buffer list.\n\
1002 If no other buffer exists, the buffer `*scratch*' is returned.\n\
1003 If BUFFER is omitted or nil, some interesting buffer is returned.")
1004 (buffer
, visible_ok
, frame
)
1005 register Lisp_Object buffer
, visible_ok
, frame
;
1007 Lisp_Object
Fset_buffer_major_mode ();
1008 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1012 frame
= selected_frame
;
1014 tail
= Vbuffer_alist
;
1015 pred
= frame_buffer_predicate (frame
);
1017 /* Consider buffers that have been seen in the selected frame
1018 before other buffers. */
1020 tem
= frame_buffer_list (frame
);
1024 if (BUFFERP (XCAR (tem
)))
1025 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1028 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1030 for (; !NILP (tail
); tail
= Fcdr (tail
))
1032 buf
= Fcdr (Fcar (tail
));
1033 if (EQ (buf
, buffer
))
1035 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1037 /* If the selected frame has a buffer_predicate,
1038 disregard buffers that don't fit the predicate. */
1041 tem
= call1 (pred
, buf
);
1046 if (NILP (visible_ok
))
1047 tem
= Fget_buffer_window (buf
, Qt
);
1052 if (NILP (notsogood
))
1055 if (!NILP (notsogood
))
1057 buf
= Fget_buffer (build_string ("*scratch*"));
1060 buf
= Fget_buffer_create (build_string ("*scratch*"));
1061 Fset_buffer_major_mode (buf
);
1066 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1068 "Make BUFFER stop keeping undo information.\n\
1069 No argument or nil as argument means do this for the current buffer.")
1071 register Lisp_Object buffer
;
1073 Lisp_Object real_buffer
;
1076 XSETBUFFER (real_buffer
, current_buffer
);
1079 real_buffer
= Fget_buffer (buffer
);
1080 if (NILP (real_buffer
))
1084 XBUFFER (real_buffer
)->undo_list
= Qt
;
1089 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1091 "Start keeping undo information for buffer BUFFER.\n\
1092 No argument or nil as argument means do this for the current buffer.")
1094 register Lisp_Object buffer
;
1096 Lisp_Object real_buffer
;
1099 XSETBUFFER (real_buffer
, current_buffer
);
1102 real_buffer
= Fget_buffer (buffer
);
1103 if (NILP (real_buffer
))
1107 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1108 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1114 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1115 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1116 The buffer being killed will be current while the hook is running.\n\
1119 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1120 "Kill the buffer BUFFER.\n\
1121 The argument may be a buffer or may be the name of a buffer.\n\
1122 An argument of nil means kill the current buffer.\n\n\
1123 Value is t if the buffer is actually killed, nil if user says no.\n\n\
1124 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
1125 if not void, is a list of functions to be called, with no arguments,\n\
1126 before the buffer is actually killed. The buffer to be killed is current\n\
1127 when the hook functions are called.\n\n\
1128 Any processes that have this buffer as the `process-buffer' are killed\n\
1134 register struct buffer
*b
;
1135 register Lisp_Object tem
;
1136 register struct Lisp_Marker
*m
;
1137 struct gcpro gcpro1
;
1140 buf
= Fcurrent_buffer ();
1142 buf
= Fget_buffer (buffer
);
1148 /* Avoid trouble for buffer already dead. */
1152 /* Query if the buffer is still modified. */
1153 if (INTERACTIVE
&& !NILP (b
->filename
)
1154 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1157 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1158 XSTRING (b
->name
)->data
));
1164 /* Run hooks with the buffer to be killed the current buffer. */
1166 int count
= specpdl_ptr
- specpdl
;
1169 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1170 set_buffer_internal (b
);
1172 /* First run the query functions; if any query is answered no,
1173 don't kill the buffer. */
1174 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1176 tem
= call0 (Fcar (list
));
1178 return unbind_to (count
, Qnil
);
1181 /* Then run the hooks. */
1182 if (!NILP (Vrun_hooks
))
1183 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1184 unbind_to (count
, Qnil
);
1187 /* We have no more questions to ask. Verify that it is valid
1188 to kill the buffer. This must be done after the questions
1189 since anything can happen within do_yes_or_no_p. */
1191 /* Don't kill the minibuffer now current. */
1192 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1198 /* When we kill a base buffer, kill all its indirect buffers.
1199 We do it at this stage so nothing terrible happens if they
1200 ask questions or their hooks get errors. */
1201 if (! b
->base_buffer
)
1203 struct buffer
*other
;
1207 for (other
= all_buffers
; other
; other
= other
->next
)
1208 /* all_buffers contains dead buffers too;
1209 don't re-kill them. */
1210 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1213 XSETBUFFER (buf
, other
);
1220 /* Make this buffer not be current.
1221 In the process, notice if this is the sole visible buffer
1222 and give up if so. */
1223 if (b
== current_buffer
)
1225 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1227 if (b
== current_buffer
)
1231 /* Now there is no question: we can kill the buffer. */
1233 #ifdef CLASH_DETECTION
1234 /* Unlock this buffer's file, if it is locked. */
1236 #endif /* CLASH_DETECTION */
1238 kill_buffer_processes (buf
);
1240 tem
= Vinhibit_quit
;
1242 replace_buffer_in_all_windows (buf
);
1243 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1244 frames_discard_buffer (buf
);
1245 Vinhibit_quit
= tem
;
1247 /* Delete any auto-save file, if we saved it in this session. */
1248 if (STRINGP (b
->auto_save_file_name
)
1249 && b
->auto_save_modified
!= 0
1250 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1253 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1255 internal_delete_file (b
->auto_save_file_name
);
1260 /* Unchain all markers that belong to this indirect buffer.
1261 Don't unchain the markers that belong to the base buffer
1262 or its other indirect buffers. */
1263 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1269 unchain_marker (tem
);
1275 /* Unchain all markers of this buffer and its indirect buffers.
1276 and leave them pointing nowhere. */
1277 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1284 BUF_MARKERS (b
) = Qnil
;
1285 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1287 /* Perhaps we should explicitly free the interval tree here... */
1290 /* Reset the local variables, so that this buffer's local values
1291 won't be protected from GC. They would be protected
1292 if they happened to remain encached in their symbols.
1293 This gets rid of them for certain. */
1294 swap_out_buffer_local_variables (b
);
1295 reset_buffer_local_variables (b
, 1);
1300 if (! b
->base_buffer
)
1301 BUFFER_FREE (BUF_BEG_ADDR (b
));
1303 if (b
->newline_cache
)
1305 free_region_cache (b
->newline_cache
);
1306 b
->newline_cache
= 0;
1308 if (b
->width_run_cache
)
1310 free_region_cache (b
->width_run_cache
);
1311 b
->width_run_cache
= 0;
1313 b
->width_table
= Qnil
;
1315 b
->undo_list
= Qnil
;
1320 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1321 we do this each time BUF is selected visibly, the more recently
1322 selected buffers are always closer to the front of the list. This
1323 means that other_buffer is more likely to choose a relevant buffer. */
1329 register Lisp_Object link
, prev
;
1331 frame
= selected_frame
;
1334 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1336 if (EQ (XCDR (XCAR (link
)), buf
))
1341 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1342 we cannot use Fdelq itself here because it allows quitting. */
1345 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1347 XCDR (prev
) = XCDR (XCDR (prev
));
1349 XCDR (link
) = Vbuffer_alist
;
1350 Vbuffer_alist
= link
;
1352 /* Now move this buffer to the front of frame_buffer_list also. */
1355 for (link
= frame_buffer_list (frame
); CONSP (link
);
1358 if (EQ (XCAR (link
), buf
))
1363 /* Effectively do delq. */
1368 set_frame_buffer_list (frame
,
1369 XCDR (frame_buffer_list (frame
)));
1371 XCDR (prev
) = XCDR (XCDR (prev
));
1373 XCDR (link
) = frame_buffer_list (frame
);
1374 set_frame_buffer_list (frame
, link
);
1377 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1380 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1381 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1382 Use this function before selecting the buffer, since it may need to inspect\n\
1383 the current buffer's major mode.")
1388 Lisp_Object function
;
1390 function
= buffer_defaults
.major_mode
;
1391 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1392 function
= current_buffer
->major_mode
;
1394 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1397 count
= specpdl_ptr
- specpdl
;
1399 /* To select a nonfundamental mode,
1400 select the buffer temporarily and then call the mode function. */
1402 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1404 Fset_buffer (buffer
);
1407 return unbind_to (count
, Qnil
);
1410 /* If switching buffers in WINDOW would be an error, return
1411 a C string saying what the error would be. */
1414 no_switch_window (window
)
1418 if (EQ (minibuf_window
, window
))
1419 return "Cannot switch buffers in minibuffer window";
1420 tem
= Fwindow_dedicated_p (window
);
1422 return "Cannot switch buffers in a dedicated window";
1426 /* Switch to buffer BUFFER in the selected window.
1427 If NORECORD is non-nil, don't call record_buffer. */
1430 switch_to_buffer_1 (buffer
, norecord
)
1431 Lisp_Object buffer
, norecord
;
1433 register Lisp_Object buf
;
1436 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1439 buf
= Fget_buffer (buffer
);
1442 buf
= Fget_buffer_create (buffer
);
1443 Fset_buffer_major_mode (buf
);
1447 if (NILP (norecord
))
1448 record_buffer (buf
);
1450 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1451 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1458 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1459 "Select buffer BUFFER in the current window.\n\
1460 BUFFER may be a buffer or a buffer name.\n\
1461 Optional second arg NORECORD non-nil means\n\
1462 do not put this buffer at the front of the list of recently selected ones.\n\
1464 WARNING: This is NOT the way to work on another buffer temporarily\n\
1465 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1466 the window-buffer correspondences.")
1468 Lisp_Object buffer
, norecord
;
1472 err
= no_switch_window (selected_window
);
1473 if (err
) error (err
);
1475 return switch_to_buffer_1 (buffer
, norecord
);
1478 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1479 "Select buffer BUFFER in some window, preferably a different one.\n\
1480 If BUFFER is nil, then some other buffer is chosen.\n\
1481 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1482 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1483 window even if BUFFER is already visible in the selected window.\n\
1484 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1485 of `display-buffer' for additional customization information.\n\
1487 Optional third arg NORECORD non-nil means\n\
1488 do not put this buffer at the front of the list of recently selected ones.")
1489 (buffer
, other_window
, norecord
)
1490 Lisp_Object buffer
, other_window
, norecord
;
1492 register Lisp_Object buf
;
1494 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1497 buf
= Fget_buffer (buffer
);
1500 buf
= Fget_buffer_create (buffer
);
1501 Fset_buffer_major_mode (buf
);
1505 if (NILP (norecord
))
1506 record_buffer (buf
);
1507 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1511 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1512 "Return the current buffer as a Lisp object.")
1515 register Lisp_Object buf
;
1516 XSETBUFFER (buf
, current_buffer
);
1520 /* Set the current buffer to B.
1522 We previously set windows_or_buffers_changed here to invalidate
1523 global unchanged information in beg_unchanged and end_unchanged.
1524 This is no longer necessary because we now compute unchanged
1525 information on a buffer-basis. Every action affecting other
1526 windows than the selected one requires a select_window at some
1527 time, and that increments windows_or_buffers_changed. */
1530 set_buffer_internal (b
)
1531 register struct buffer
*b
;
1533 if (current_buffer
!= b
)
1534 set_buffer_internal_1 (b
);
1537 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1538 This is used by redisplay. */
1541 set_buffer_internal_1 (b
)
1542 register struct buffer
*b
;
1544 register struct buffer
*old_buf
;
1545 register Lisp_Object tail
, valcontents
;
1548 if (current_buffer
== b
)
1551 old_buf
= current_buffer
;
1553 last_known_column_point
= -1; /* invalidate indentation cache */
1557 /* Put the undo list back in the base buffer, so that it appears
1558 that an indirect buffer shares the undo list of its base. */
1559 if (old_buf
->base_buffer
)
1560 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1562 /* If the old current buffer has markers to record PT, BEGV and ZV
1563 when it is not current, update them now. */
1564 if (! NILP (old_buf
->pt_marker
))
1567 XSETBUFFER (obuf
, old_buf
);
1568 set_marker_both (old_buf
->pt_marker
, obuf
,
1569 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1571 if (! NILP (old_buf
->begv_marker
))
1574 XSETBUFFER (obuf
, old_buf
);
1575 set_marker_both (old_buf
->begv_marker
, obuf
,
1576 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1578 if (! NILP (old_buf
->zv_marker
))
1581 XSETBUFFER (obuf
, old_buf
);
1582 set_marker_both (old_buf
->zv_marker
, obuf
,
1583 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1587 /* Get the undo list from the base buffer, so that it appears
1588 that an indirect buffer shares the undo list of its base. */
1590 b
->undo_list
= b
->base_buffer
->undo_list
;
1592 /* If the new current buffer has markers to record PT, BEGV and ZV
1593 when it is not current, fetch them now. */
1594 if (! NILP (b
->pt_marker
))
1596 BUF_PT (b
) = marker_position (b
->pt_marker
);
1597 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1599 if (! NILP (b
->begv_marker
))
1601 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1602 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1604 if (! NILP (b
->zv_marker
))
1606 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1607 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1610 /* Look down buffer's list of local Lisp variables
1611 to find and update any that forward into C variables. */
1613 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1615 valcontents
= XSYMBOL (XCAR (XCAR (tail
)))->value
;
1616 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1617 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1618 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1619 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1620 /* Just reference the variable
1621 to cause it to become set for this buffer. */
1622 Fsymbol_value (XCAR (XCAR (tail
)));
1625 /* Do the same with any others that were local to the previous buffer */
1628 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1630 valcontents
= XSYMBOL (XCAR (XCAR (tail
)))->value
;
1631 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1632 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1633 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1634 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1635 /* Just reference the variable
1636 to cause it to become set for this buffer. */
1637 Fsymbol_value (XCAR (XCAR (tail
)));
1641 /* Switch to buffer B temporarily for redisplay purposes.
1642 This avoids certain things that don't need to be done within redisplay. */
1648 register struct buffer
*old_buf
;
1650 if (current_buffer
== b
)
1653 old_buf
= current_buffer
;
1658 /* If the old current buffer has markers to record PT, BEGV and ZV
1659 when it is not current, update them now. */
1660 if (! NILP (old_buf
->pt_marker
))
1663 XSETBUFFER (obuf
, old_buf
);
1664 set_marker_both (old_buf
->pt_marker
, obuf
,
1665 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1667 if (! NILP (old_buf
->begv_marker
))
1670 XSETBUFFER (obuf
, old_buf
);
1671 set_marker_both (old_buf
->begv_marker
, obuf
,
1672 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1674 if (! NILP (old_buf
->zv_marker
))
1677 XSETBUFFER (obuf
, old_buf
);
1678 set_marker_both (old_buf
->zv_marker
, obuf
,
1679 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1683 /* If the new current buffer has markers to record PT, BEGV and ZV
1684 when it is not current, fetch them now. */
1685 if (! NILP (b
->pt_marker
))
1687 BUF_PT (b
) = marker_position (b
->pt_marker
);
1688 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1690 if (! NILP (b
->begv_marker
))
1692 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1693 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1695 if (! NILP (b
->zv_marker
))
1697 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1698 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1702 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1703 "Make the buffer BUFFER current for editing operations.\n\
1704 BUFFER may be a buffer or the name of an existing buffer.\n\
1705 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1706 This function does not display the buffer, so its effect ends\n\
1707 when the current command terminates.\n\
1708 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1710 register Lisp_Object buffer
;
1712 register Lisp_Object buf
;
1713 buf
= Fget_buffer (buffer
);
1716 if (NILP (XBUFFER (buf
)->name
))
1717 error ("Selecting deleted buffer");
1718 set_buffer_internal (XBUFFER (buf
));
1722 /* Set the current buffer to BUFFER provided it is alive. */
1725 set_buffer_if_live (buffer
)
1728 if (! NILP (XBUFFER (buffer
)->name
))
1729 Fset_buffer (buffer
);
1733 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1734 Sbarf_if_buffer_read_only
, 0, 0, 0,
1735 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1738 if (!NILP (current_buffer
->read_only
)
1739 && NILP (Vinhibit_read_only
))
1740 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1744 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1745 "Put BUFFER at the end of the list of all buffers.\n\
1746 There it is the least likely candidate for `other-buffer' to return;\n\
1747 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1748 If BUFFER is nil or omitted, bury the current buffer.\n\
1749 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1750 selected window if it is displayed there.")
1752 register Lisp_Object buffer
;
1754 /* Figure out what buffer we're going to bury. */
1757 XSETBUFFER (buffer
, current_buffer
);
1759 /* If we're burying the current buffer, unshow it. */
1760 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1766 buf1
= Fget_buffer (buffer
);
1772 /* Move buffer to the end of the buffer list. Do nothing if the
1773 buffer is killed. */
1774 if (!NILP (XBUFFER (buffer
)->name
))
1776 Lisp_Object aelt
, link
;
1778 aelt
= Frassq (buffer
, Vbuffer_alist
);
1779 link
= Fmemq (aelt
, Vbuffer_alist
);
1780 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1782 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1784 frames_bury_buffer (buffer
);
1790 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1791 "Delete the entire contents of the current buffer.\n\
1792 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1793 so the buffer is truly empty after this.")
1800 current_buffer
->last_window_start
= 1;
1801 /* Prevent warnings, or suspension of auto saving, that would happen
1802 if future size is less than past size. Use of erase-buffer
1803 implies that the future text is not really related to the past text. */
1804 XSETFASTINT (current_buffer
->save_length
, 0);
1809 validate_region (b
, e
)
1810 register Lisp_Object
*b
, *e
;
1812 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1813 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1815 if (XINT (*b
) > XINT (*e
))
1818 tem
= *b
; *b
= *e
; *e
= tem
;
1821 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1822 && XINT (*e
) <= ZV
))
1823 args_out_of_range (*b
, *e
);
1826 /* Advance BYTE_POS up to a character boundary
1827 and return the adjusted position. */
1830 advance_to_char_boundary (byte_pos
)
1835 if (byte_pos
== BEG
)
1836 /* Beginning of buffer is always a character boundary. */
1839 c
= FETCH_BYTE (byte_pos
);
1840 if (! CHAR_HEAD_P (c
))
1842 /* We should advance BYTE_POS only when C is a constituent of a
1843 multibyte sequence. */
1844 int orig_byte_pos
= byte_pos
;
1849 c
= FETCH_BYTE (byte_pos
);
1851 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1853 if (byte_pos
< orig_byte_pos
)
1854 byte_pos
= orig_byte_pos
;
1855 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1856 surely advance to the correct character boundary. If C is
1857 not, BYTE_POS was unchanged. */
1863 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1865 "Set the multibyte flag of the current buffer to FLAG.\n\
1866 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1867 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1868 The buffer contents remain unchanged as a sequence of bytes\n\
1869 but the contents viewed as characters do change.")
1873 Lisp_Object tail
, markers
;
1874 struct buffer
*other
;
1875 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
1876 int begv
= BEGV
, zv
= ZV
;
1877 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
1878 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
1880 if (current_buffer
->base_buffer
)
1881 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
1883 /* Do nothing if nothing actually changes. */
1884 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1887 /* It would be better to update the list,
1888 but this is good enough for now. */
1890 current_buffer
->undo_list
= Qt
;
1892 /* If the cached position is for this buffer, clear it out. */
1893 clear_charpos_cache (current_buffer
);
1903 /* Do this first, so it can use CHAR_TO_BYTE
1904 to calculate the old correspondences. */
1905 set_intervals_multibyte (0);
1907 current_buffer
->enable_multibyte_characters
= Qnil
;
1913 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1915 tail
= BUF_MARKERS (current_buffer
);
1916 while (! NILP (tail
))
1918 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1919 tail
= XMARKER (tail
)->chain
;
1922 /* Convert multibyte form of 8-bit characters to unibyte. */
1937 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
1938 p
+= bytes
, pos
+= bytes
;
1941 c
= STRING_CHAR (p
, stop
- pos
);
1942 /* Delete all bytes for this 8-bit character but the
1943 last one, and change the last one to the charcter
1946 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
1958 Fnarrow_to_region (make_number (begv
), make_number (zv
));
1966 /* Be sure not to have a multibyte sequence striding over the GAP.
1967 Ex: We change this: "...abc\201 _GAP_ \241def..."
1968 to: "...abc _GAP_ \201\241def..." */
1970 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1971 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1973 unsigned char *p
= GPT_ADDR
- 1;
1975 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1976 if (BASE_LEADING_CODE_P (*p
))
1978 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1980 move_gap_both (new_gpt
, new_gpt
);
1984 /* Make the buffer contents valid as multibyte by converting
1985 8-bit characters to multibyte form. */
2001 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2002 p
+= bytes
, pos
+= bytes
;
2005 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2007 bytes
= CHAR_STRING (*p
, tmp
);
2009 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2011 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2012 /* Now the gap is after the just inserted data. */
2029 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2031 /* Do this first, so that chars_in_text asks the right question.
2032 set_intervals_multibyte needs it too. */
2033 current_buffer
->enable_multibyte_characters
= Qt
;
2035 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2036 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2038 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2040 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2041 if (BEGV_BYTE
> GPT_BYTE
)
2042 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2044 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2046 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2047 if (ZV_BYTE
> GPT_BYTE
)
2048 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2050 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2053 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2056 if (pt_byte
> GPT_BYTE
)
2057 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2059 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2060 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2063 tail
= markers
= BUF_MARKERS (current_buffer
);
2065 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2066 getting confused by the markers that have not yet been updated.
2067 It is also a signal that it should never create a marker. */
2068 BUF_MARKERS (current_buffer
) = Qnil
;
2070 while (! NILP (tail
))
2072 XMARKER (tail
)->bytepos
2073 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2074 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2076 tail
= XMARKER (tail
)->chain
;
2079 /* Make sure no markers were put on the chain
2080 while the chain value was incorrect. */
2081 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2084 BUF_MARKERS (current_buffer
) = markers
;
2086 /* Do this last, so it can calculate the new correspondences
2087 between chars and bytes. */
2088 set_intervals_multibyte (1);
2092 current_buffer
->undo_list
= Qnil
;
2094 /* Changing the multibyteness of a buffer means that all windows
2095 showing that buffer must be updated thoroughly. */
2096 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2097 ++windows_or_buffers_changed
;
2099 /* Copy this buffer's new multibyte status
2100 into all of its indirect buffers. */
2101 for (other
= all_buffers
; other
; other
= other
->next
)
2102 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2104 other
->enable_multibyte_characters
2105 = current_buffer
->enable_multibyte_characters
;
2106 other
->prevent_redisplay_optimizations_p
= 1;
2109 /* Restore the modifiedness of the buffer. */
2110 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2111 Fset_buffer_modified_p (Qnil
);
2116 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2118 "Switch to Fundamental mode by killing current buffer's local variables.\n\
2119 Most local variable bindings are eliminated so that the default values\n\
2120 become effective once more. Also, the syntax table is set from\n\
2121 `standard-syntax-table', the local keymap is set to nil,\n\
2122 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
2123 This function also forces redisplay of the mode line.\n\
2125 Every function to select a new major mode starts by\n\
2126 calling this function.\n\n\
2127 As a special exception, local variables whose names have\n\
2128 a non-nil `permanent-local' property are not eliminated by this function.\n\
2130 The first thing this function does is run\n\
2131 the normal hook `change-major-mode-hook'.")
2134 register Lisp_Object alist
, sym
, tem
;
2137 if (!NILP (Vrun_hooks
))
2138 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2139 oalist
= current_buffer
->local_var_alist
;
2141 /* Make sure none of the bindings in oalist
2142 remain swapped in, in their symbols. */
2144 swap_out_buffer_local_variables (current_buffer
);
2146 /* Actually eliminate all local bindings of this buffer. */
2148 reset_buffer_local_variables (current_buffer
, 0);
2150 /* Redisplay mode lines; we are changing major mode. */
2152 update_mode_lines
++;
2154 /* Any which are supposed to be permanent,
2155 make local again, with the same values they had. */
2157 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2159 sym
= XCAR (XCAR (alist
));
2160 tem
= Fget (sym
, Qpermanent_local
);
2163 Fmake_local_variable (sym
);
2164 Fset (sym
, XCDR (XCAR (alist
)));
2168 /* Force mode-line redisplay. Useful here because all major mode
2169 commands call this function. */
2170 update_mode_lines
++;
2175 /* Make sure no local variables remain set up with buffer B
2176 for their current values. */
2179 swap_out_buffer_local_variables (b
)
2182 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2184 XSETBUFFER (buffer
, b
);
2185 oalist
= b
->local_var_alist
;
2187 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2189 sym
= XCAR (XCAR (alist
));
2191 /* Need not do anything if some other buffer's binding is now encached. */
2192 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
;
2193 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2195 /* Symbol is set up for this buffer's old local value.
2196 Set it up for the current buffer with the default value. */
2198 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
;
2199 /* Store the symbol's current value into the alist entry
2200 it is currently set up for. This is so that, if the
2201 local is marked permanent, and we make it local again
2202 later in Fkill_all_local_variables, we don't lose the value. */
2204 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
);
2205 /* Switch to the symbol's default-value alist entry. */
2207 /* Mark it as current for buffer B. */
2208 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
= buffer
;
2209 /* Store the current value into any forwarding in the symbol. */
2210 store_symval_forwarding (sym
,
2211 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
,
2217 /* Find all the overlays in the current buffer that contain position POS.
2218 Return the number found, and store them in a vector in *VEC_PTR.
2219 Store in *LEN_PTR the size allocated for the vector.
2220 Store in *NEXT_PTR the next position after POS where an overlay starts,
2221 or ZV if there are no more overlays.
2222 Store in *PREV_PTR the previous position before POS where an overlay ends,
2223 or where an overlay starts which ends at or after POS;
2224 or BEGV if there are no such overlays.
2225 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2227 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2228 when this function is called.
2230 If EXTEND is non-zero, we make the vector bigger if necessary.
2231 If EXTEND is zero, we never extend the vector,
2232 and we store only as many overlays as will fit.
2233 But we still return the total number of overlays.
2235 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2236 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2237 default (BEGV or ZV). */
2240 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2243 Lisp_Object
**vec_ptr
;
2249 Lisp_Object tail
, overlay
, start
, end
;
2252 Lisp_Object
*vec
= *vec_ptr
;
2255 int inhibit_storing
= 0;
2257 for (tail
= current_buffer
->overlays_before
;
2261 int startpos
, endpos
;
2263 overlay
= XCAR (tail
);
2265 start
= OVERLAY_START (overlay
);
2266 end
= OVERLAY_END (overlay
);
2267 endpos
= OVERLAY_POSITION (end
);
2274 startpos
= OVERLAY_POSITION (start
);
2275 /* This one ends at or after POS
2276 so its start counts for PREV_PTR if it's before POS. */
2277 if (prev
< startpos
&& startpos
< pos
)
2281 if (startpos
<= pos
)
2285 /* The supplied vector is full.
2286 Either make it bigger, or don't store any more in it. */
2289 /* Make it work with an initial len == 0. */
2294 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2298 inhibit_storing
= 1;
2301 if (!inhibit_storing
)
2303 /* Keep counting overlays even if we can't return them all. */
2306 else if (startpos
< next
)
2310 for (tail
= current_buffer
->overlays_after
;
2314 int startpos
, endpos
;
2316 overlay
= XCAR (tail
);
2318 start
= OVERLAY_START (overlay
);
2319 end
= OVERLAY_END (overlay
);
2320 startpos
= OVERLAY_POSITION (start
);
2323 if (startpos
< next
)
2327 endpos
= OVERLAY_POSITION (end
);
2334 *len_ptr
= len
*= 2;
2337 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2341 inhibit_storing
= 1;
2344 if (!inhibit_storing
)
2348 if (startpos
< pos
&& startpos
> prev
)
2351 else if (endpos
< pos
&& endpos
> prev
)
2353 else if (endpos
== pos
&& startpos
> prev
&& !change_req
)
2364 /* Find all the overlays in the current buffer that overlap the range BEG-END
2365 or are empty at BEG.
2367 Return the number found, and store them in a vector in *VEC_PTR.
2368 Store in *LEN_PTR the size allocated for the vector.
2369 Store in *NEXT_PTR the next position after POS where an overlay starts,
2370 or ZV if there are no more overlays.
2371 Store in *PREV_PTR the previous position before POS where an overlay ends,
2372 or BEGV if there are no previous overlays.
2373 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2375 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2376 when this function is called.
2378 If EXTEND is non-zero, we make the vector bigger if necessary.
2379 If EXTEND is zero, we never extend the vector,
2380 and we store only as many overlays as will fit.
2381 But we still return the total number of overlays. */
2384 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2387 Lisp_Object
**vec_ptr
;
2392 Lisp_Object tail
, overlay
, ostart
, oend
;
2395 Lisp_Object
*vec
= *vec_ptr
;
2398 int inhibit_storing
= 0;
2400 for (tail
= current_buffer
->overlays_before
;
2404 int startpos
, endpos
;
2406 overlay
= XCAR (tail
);
2408 ostart
= OVERLAY_START (overlay
);
2409 oend
= OVERLAY_END (overlay
);
2410 endpos
= OVERLAY_POSITION (oend
);
2417 startpos
= OVERLAY_POSITION (ostart
);
2418 /* Count an interval if it either overlaps the range
2419 or is empty at the start of the range. */
2420 if ((beg
< endpos
&& startpos
< end
)
2421 || (startpos
== endpos
&& beg
== endpos
))
2425 /* The supplied vector is full.
2426 Either make it bigger, or don't store any more in it. */
2429 *len_ptr
= len
*= 2;
2430 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2434 inhibit_storing
= 1;
2437 if (!inhibit_storing
)
2439 /* Keep counting overlays even if we can't return them all. */
2442 else if (startpos
< next
)
2446 for (tail
= current_buffer
->overlays_after
;
2450 int startpos
, endpos
;
2452 overlay
= XCAR (tail
);
2454 ostart
= OVERLAY_START (overlay
);
2455 oend
= OVERLAY_END (overlay
);
2456 startpos
= OVERLAY_POSITION (ostart
);
2459 if (startpos
< next
)
2463 endpos
= OVERLAY_POSITION (oend
);
2464 /* Count an interval if it either overlaps the range
2465 or is empty at the start of the range. */
2466 if ((beg
< endpos
&& startpos
< end
)
2467 || (startpos
== endpos
&& beg
== endpos
))
2473 *len_ptr
= len
*= 2;
2474 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2478 inhibit_storing
= 1;
2481 if (!inhibit_storing
)
2485 else if (endpos
< beg
&& endpos
> prev
)
2496 /* Fast function to just test if we're at an overlay boundary. */
2498 overlay_touches_p (pos
)
2501 Lisp_Object tail
, overlay
;
2503 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2508 overlay
= XCAR (tail
);
2509 if (!GC_OVERLAYP (overlay
))
2512 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2515 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2519 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2524 overlay
= XCAR (tail
);
2525 if (!GC_OVERLAYP (overlay
))
2528 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2531 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2539 Lisp_Object overlay
;
2545 compare_overlays (v1
, v2
)
2546 const void *v1
, *v2
;
2548 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2549 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2550 if (s1
->priority
!= s2
->priority
)
2551 return s1
->priority
- s2
->priority
;
2552 if (s1
->beg
!= s2
->beg
)
2553 return s1
->beg
- s2
->beg
;
2554 if (s1
->end
!= s2
->end
)
2555 return s2
->end
- s1
->end
;
2559 /* Sort an array of overlays by priority. The array is modified in place.
2560 The return value is the new size; this may be smaller than the original
2561 size if some of the overlays were invalid or were window-specific. */
2563 sort_overlays (overlay_vec
, noverlays
, w
)
2564 Lisp_Object
*overlay_vec
;
2569 struct sortvec
*sortvec
;
2570 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2572 /* Put the valid and relevant overlays into sortvec. */
2574 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2577 Lisp_Object overlay
;
2579 overlay
= overlay_vec
[i
];
2580 if (OVERLAY_VALID (overlay
)
2581 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2582 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2584 /* If we're interested in a specific window, then ignore
2585 overlays that are limited to some other window. */
2590 window
= Foverlay_get (overlay
, Qwindow
);
2591 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2595 /* This overlay is good and counts: put it into sortvec. */
2596 sortvec
[j
].overlay
= overlay
;
2597 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2598 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2599 tem
= Foverlay_get (overlay
, Qpriority
);
2601 sortvec
[j
].priority
= XINT (tem
);
2603 sortvec
[j
].priority
= 0;
2609 /* Sort the overlays into the proper order: increasing priority. */
2612 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2614 for (i
= 0; i
< noverlays
; i
++)
2615 overlay_vec
[i
] = sortvec
[i
].overlay
;
2621 Lisp_Object string
, string2
;
2628 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2629 int size
; /* Allocated length of that array. */
2630 int used
; /* How much of the array is currently in use. */
2631 int bytes
; /* Total length of the strings in buf. */
2634 /* Buffers for storing information about the overlays touching a given
2635 position. These could be automatic variables in overlay_strings, but
2636 it's more efficient to hold onto the memory instead of repeatedly
2637 allocating and freeing it. */
2638 static struct sortstrlist overlay_heads
, overlay_tails
;
2639 static unsigned char *overlay_str_buf
;
2641 /* Allocated length of overlay_str_buf. */
2642 static int overlay_str_len
;
2644 /* A comparison function suitable for passing to qsort. */
2646 cmp_for_strings (as1
, as2
)
2649 struct sortstr
*s1
= (struct sortstr
*)as1
;
2650 struct sortstr
*s2
= (struct sortstr
*)as2
;
2651 if (s1
->size
!= s2
->size
)
2652 return s2
->size
- s1
->size
;
2653 if (s1
->priority
!= s2
->priority
)
2654 return s1
->priority
- s2
->priority
;
2659 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2660 struct sortstrlist
*ssl
;
2661 Lisp_Object str
, str2
, pri
;
2666 if (ssl
->used
== ssl
->size
)
2672 ssl
->buf
= ((struct sortstr
*)
2673 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2675 ssl
->buf
[ssl
->used
].string
= str
;
2676 ssl
->buf
[ssl
->used
].string2
= str2
;
2677 ssl
->buf
[ssl
->used
].size
= size
;
2678 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2681 if (NILP (current_buffer
->enable_multibyte_characters
))
2682 nbytes
= XSTRING (str
)->size
;
2683 else if (! STRING_MULTIBYTE (str
))
2684 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2685 STRING_BYTES (XSTRING (str
)));
2687 nbytes
= STRING_BYTES (XSTRING (str
));
2689 ssl
->bytes
+= nbytes
;
2693 if (NILP (current_buffer
->enable_multibyte_characters
))
2694 nbytes
= XSTRING (str2
)->size
;
2695 else if (! STRING_MULTIBYTE (str2
))
2696 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2697 STRING_BYTES (XSTRING (str2
)));
2699 nbytes
= STRING_BYTES (XSTRING (str2
));
2701 ssl
->bytes
+= nbytes
;
2705 /* Return the concatenation of the strings associated with overlays that
2706 begin or end at POS, ignoring overlays that are specific to a window
2707 other than W. The strings are concatenated in the appropriate order:
2708 shorter overlays nest inside longer ones, and higher priority inside
2709 lower. Normally all of the after-strings come first, but zero-sized
2710 overlays have their after-strings ride along with the before-strings
2711 because it would look strange to print them inside-out.
2713 Returns the string length, and stores the contents indirectly through
2714 PSTR, if that variable is non-null. The string may be overwritten by
2715 subsequent calls. */
2718 overlay_strings (pos
, w
, pstr
)
2721 unsigned char **pstr
;
2723 Lisp_Object ov
, overlay
, window
, str
;
2724 int startpos
, endpos
;
2725 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2727 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2728 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2729 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2731 overlay
= XCAR (ov
);
2732 if (!OVERLAYP (overlay
))
2735 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2736 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2739 if (endpos
!= pos
&& startpos
!= pos
)
2741 window
= Foverlay_get (overlay
, Qwindow
);
2742 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2745 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2746 record_overlay_string (&overlay_heads
, str
,
2748 ? Foverlay_get (overlay
, Qafter_string
)
2750 Foverlay_get (overlay
, Qpriority
),
2752 else if (endpos
== pos
2753 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2754 record_overlay_string (&overlay_tails
, str
, Qnil
,
2755 Foverlay_get (overlay
, Qpriority
),
2758 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2760 overlay
= XCAR (ov
);
2761 if (!OVERLAYP (overlay
))
2764 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2765 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2768 if (endpos
!= pos
&& startpos
!= pos
)
2770 window
= Foverlay_get (overlay
, Qwindow
);
2771 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2774 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2775 record_overlay_string (&overlay_heads
, str
,
2777 ? Foverlay_get (overlay
, Qafter_string
)
2779 Foverlay_get (overlay
, Qpriority
),
2781 else if (endpos
== pos
2782 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2783 record_overlay_string (&overlay_tails
, str
, Qnil
,
2784 Foverlay_get (overlay
, Qpriority
),
2787 if (overlay_tails
.used
> 1)
2788 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2790 if (overlay_heads
.used
> 1)
2791 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2793 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2798 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2800 if (total
> overlay_str_len
)
2802 overlay_str_len
= total
;
2803 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2806 p
= overlay_str_buf
;
2807 for (i
= overlay_tails
.used
; --i
>= 0;)
2810 tem
= overlay_tails
.buf
[i
].string
;
2811 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2812 STRING_BYTES (XSTRING (tem
)),
2813 STRING_MULTIBYTE (tem
), multibyte
);
2816 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2819 tem
= overlay_heads
.buf
[i
].string
;
2820 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2821 STRING_BYTES (XSTRING (tem
)),
2822 STRING_MULTIBYTE (tem
), multibyte
);
2824 tem
= overlay_heads
.buf
[i
].string2
;
2827 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2828 STRING_BYTES (XSTRING (tem
)),
2829 STRING_MULTIBYTE (tem
), multibyte
);
2833 if (p
!= overlay_str_buf
+ total
)
2836 *pstr
= overlay_str_buf
;
2842 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2845 recenter_overlay_lists (buf
, pos
)
2849 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2851 /* See if anything in overlays_before should move to overlays_after. */
2853 /* We don't strictly need prev in this loop; it should always be nil.
2854 But we use it for symmetry and in case that should cease to be true
2855 with some future change. */
2857 for (tail
= buf
->overlays_before
;
2859 prev
= tail
, tail
= next
)
2862 overlay
= XCAR (tail
);
2864 /* If the overlay is not valid, get rid of it. */
2865 if (!OVERLAY_VALID (overlay
))
2870 /* Splice the cons cell TAIL out of overlays_before. */
2874 buf
->overlays_before
= next
;
2880 beg
= OVERLAY_START (overlay
);
2881 end
= OVERLAY_END (overlay
);
2883 if (OVERLAY_POSITION (end
) > pos
)
2885 /* OVERLAY needs to be moved. */
2886 int where
= OVERLAY_POSITION (beg
);
2887 Lisp_Object other
, other_prev
;
2889 /* Splice the cons cell TAIL out of overlays_before. */
2893 buf
->overlays_before
= next
;
2895 /* Search thru overlays_after for where to put it. */
2897 for (other
= buf
->overlays_after
;
2899 other_prev
= other
, other
= XCDR (other
))
2901 Lisp_Object otherbeg
, otheroverlay
;
2903 otheroverlay
= XCAR (other
);
2904 if (! OVERLAY_VALID (otheroverlay
))
2907 otherbeg
= OVERLAY_START (otheroverlay
);
2908 if (OVERLAY_POSITION (otherbeg
) >= where
)
2912 /* Add TAIL to overlays_after before OTHER. */
2913 XCDR (tail
) = other
;
2914 if (!NILP (other_prev
))
2915 XCDR (other_prev
) = tail
;
2917 buf
->overlays_after
= tail
;
2921 /* We've reached the things that should stay in overlays_before.
2922 All the rest of overlays_before must end even earlier,
2927 /* See if anything in overlays_after should be in overlays_before. */
2929 for (tail
= buf
->overlays_after
;
2931 prev
= tail
, tail
= next
)
2934 overlay
= XCAR (tail
);
2936 /* If the overlay is not valid, get rid of it. */
2937 if (!OVERLAY_VALID (overlay
))
2942 /* Splice the cons cell TAIL out of overlays_after. */
2946 buf
->overlays_after
= next
;
2952 beg
= OVERLAY_START (overlay
);
2953 end
= OVERLAY_END (overlay
);
2955 /* Stop looking, when we know that nothing further
2956 can possibly end before POS. */
2957 if (OVERLAY_POSITION (beg
) > pos
)
2960 if (OVERLAY_POSITION (end
) <= pos
)
2962 /* OVERLAY needs to be moved. */
2963 int where
= OVERLAY_POSITION (end
);
2964 Lisp_Object other
, other_prev
;
2966 /* Splice the cons cell TAIL out of overlays_after. */
2970 buf
->overlays_after
= next
;
2972 /* Search thru overlays_before for where to put it. */
2974 for (other
= buf
->overlays_before
;
2976 other_prev
= other
, other
= XCDR (other
))
2978 Lisp_Object otherend
, otheroverlay
;
2980 otheroverlay
= XCAR (other
);
2981 if (! OVERLAY_VALID (otheroverlay
))
2984 otherend
= OVERLAY_END (otheroverlay
);
2985 if (OVERLAY_POSITION (otherend
) <= where
)
2989 /* Add TAIL to overlays_before before OTHER. */
2990 XCDR (tail
) = other
;
2991 if (!NILP (other_prev
))
2992 XCDR (other_prev
) = tail
;
2994 buf
->overlays_before
= tail
;
2999 XSETFASTINT (buf
->overlay_center
, pos
);
3003 adjust_overlays_for_insert (pos
, length
)
3007 /* After an insertion, the lists are still sorted properly,
3008 but we may need to update the value of the overlay center. */
3009 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3010 XSETFASTINT (current_buffer
->overlay_center
,
3011 XFASTINT (current_buffer
->overlay_center
) + length
);
3015 adjust_overlays_for_delete (pos
, length
)
3019 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3020 /* The deletion was to our right. No change needed; the before- and
3021 after-lists are still consistent. */
3023 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3024 /* The deletion was to our left. We need to adjust the center value
3025 to account for the change in position, but the lists are consistent
3026 given the new value. */
3027 XSETFASTINT (current_buffer
->overlay_center
,
3028 XFASTINT (current_buffer
->overlay_center
) - length
);
3030 /* We're right in the middle. There might be things on the after-list
3031 that now belong on the before-list. Recentering will move them,
3032 and also update the center point. */
3033 recenter_overlay_lists (current_buffer
, pos
);
3036 /* Fix up overlays that were garbled as a result of permuting markers
3037 in the range START through END. Any overlay with at least one
3038 endpoint in this range will need to be unlinked from the overlay
3039 list and reinserted in its proper place.
3040 Such an overlay might even have negative size at this point.
3041 If so, we'll reverse the endpoints. Can you think of anything
3042 better to do in this situation? */
3044 fix_overlays_in_range (start
, end
)
3045 register int start
, end
;
3047 Lisp_Object overlay
;
3048 Lisp_Object before_list
, after_list
;
3049 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
3050 int startpos
, endpos
;
3052 /* This algorithm shifts links around instead of consing and GCing.
3053 The loop invariant is that before_list (resp. after_list) is a
3054 well-formed list except that its last element, the one that
3055 *pbefore (resp. *pafter) points to, is still uninitialized.
3056 So it's not a bug that before_list isn't initialized, although
3057 it may look strange. */
3058 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
3060 overlay
= XCAR (*ptail
);
3061 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3064 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3066 || (startpos
>= start
&& startpos
< end
))
3068 /* If the overlay is backwards, fix that now. */
3069 if (startpos
> endpos
)
3072 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3074 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3076 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3078 /* Add it to the end of the wrong list. Later on,
3079 recenter_overlay_lists will move it to the right place. */
3080 if (endpos
< XINT (current_buffer
->overlay_center
))
3083 pafter
= &XCDR (*ptail
);
3088 pbefore
= &XCDR (*ptail
);
3090 *ptail
= XCDR (*ptail
);
3093 ptail
= &XCDR (*ptail
);
3095 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
3097 overlay
= XCAR (*ptail
);
3098 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3099 if (startpos
>= end
)
3101 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3102 if (startpos
>= start
3103 || (endpos
>= start
&& endpos
< end
))
3105 if (startpos
> endpos
)
3108 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3110 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3112 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3114 if (endpos
< XINT (current_buffer
->overlay_center
))
3117 pafter
= &XCDR (*ptail
);
3122 pbefore
= &XCDR (*ptail
);
3124 *ptail
= XCDR (*ptail
);
3127 ptail
= &XCDR (*ptail
);
3130 /* Splice the constructed (wrong) lists into the buffer's lists,
3131 and let the recenter function make it sane again. */
3132 *pbefore
= current_buffer
->overlays_before
;
3133 current_buffer
->overlays_before
= before_list
;
3134 recenter_overlay_lists (current_buffer
,
3135 XINT (current_buffer
->overlay_center
));
3137 *pafter
= current_buffer
->overlays_after
;
3138 current_buffer
->overlays_after
= after_list
;
3139 recenter_overlay_lists (current_buffer
,
3140 XINT (current_buffer
->overlay_center
));
3143 /* We have two types of overlay: the one whose ending marker is
3144 after-insertion-marker (this is the usual case) and the one whose
3145 ending marker is before-insertion-marker. When `overlays_before'
3146 contains overlays of the latter type and the former type in this
3147 order and both overlays end at inserting position, inserting a text
3148 increases only the ending marker of the latter type, which results
3149 in incorrect ordering of `overlays_before'.
3151 This function fixes ordering of overlays in the slot
3152 `overlays_before' of the buffer *BP. Before the insertion, `point'
3153 was at PREV, and now is at POS. */
3156 fix_overlays_before (bp
, prev
, pos
)
3160 Lisp_Object
*tailp
= &bp
->overlays_before
;
3161 Lisp_Object
*right_place
;
3164 /* After the insertion, the several overlays may be in incorrect
3165 order. The possibility is that, in the list `overlays_before',
3166 an overlay which ends at POS appears after an overlay which ends
3167 at PREV. Since POS is greater than PREV, we must fix the
3168 ordering of these overlays, by moving overlays ends at POS before
3169 the overlays ends at PREV. */
3171 /* At first, find a place where disordered overlays should be linked
3172 in. It is where an overlay which end before POS exists. (i.e. an
3173 overlay whose ending marker is after-insertion-marker if disorder
3175 while (!NILP (*tailp
)
3176 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
))))
3178 tailp
= &XCDR (*tailp
);
3180 /* If we don't find such an overlay,
3181 or the found one ends before PREV,
3182 or the found one is the last one in the list,
3183 we don't have to fix anything. */
3186 || NILP (XCDR (*tailp
)))
3189 right_place
= tailp
;
3190 tailp
= &XCDR (*tailp
);
3192 /* Now, end position of overlays in the list *TAILP should be before
3193 or equal to PREV. In the loop, an overlay which ends at POS is
3194 moved ahead to the place pointed by RIGHT_PLACE. If we found an
3195 overlay which ends before PREV, the remaining overlays are in
3197 while (!NILP (*tailp
))
3199 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
)));
3202 { /* This overlay is disordered. */
3203 Lisp_Object found
= *tailp
;
3205 /* Unlink the found overlay. */
3206 *tailp
= XCDR (found
);
3207 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
3208 XCDR (found
) = *right_place
;
3209 /* Link it into the right place. */
3210 *right_place
= found
;
3212 else if (end
== prev
)
3213 tailp
= &XCDR (*tailp
);
3214 else /* No more disordered overlay. */
3219 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3220 "Return t if OBJECT is an overlay.")
3224 return (OVERLAYP (object
) ? Qt
: Qnil
);
3227 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3228 "Create a new overlay with range BEG to END in BUFFER.\n\
3229 If omitted, BUFFER defaults to the current buffer.\n\
3230 BEG and END may be integers or markers.\n\
3231 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
3232 front delimiter advance when text is inserted there.\n\
3233 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
3234 rear delimiter advance when text is inserted there.")
3235 (beg
, end
, buffer
, front_advance
, rear_advance
)
3236 Lisp_Object beg
, end
, buffer
;
3237 Lisp_Object front_advance
, rear_advance
;
3239 Lisp_Object overlay
;
3243 XSETBUFFER (buffer
, current_buffer
);
3245 CHECK_BUFFER (buffer
, 2);
3247 && ! EQ (Fmarker_buffer (beg
), buffer
))
3248 error ("Marker points into wrong buffer");
3250 && ! EQ (Fmarker_buffer (end
), buffer
))
3251 error ("Marker points into wrong buffer");
3253 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3254 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3256 if (XINT (beg
) > XINT (end
))
3259 temp
= beg
; beg
= end
; end
= temp
;
3262 b
= XBUFFER (buffer
);
3264 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3265 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3267 if (!NILP (front_advance
))
3268 XMARKER (beg
)->insertion_type
= 1;
3269 if (!NILP (rear_advance
))
3270 XMARKER (end
)->insertion_type
= 1;
3272 overlay
= allocate_misc ();
3273 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3274 XOVERLAY (overlay
)->start
= beg
;
3275 XOVERLAY (overlay
)->end
= end
;
3276 XOVERLAY (overlay
)->plist
= Qnil
;
3278 /* Put the new overlay on the wrong list. */
3279 end
= OVERLAY_END (overlay
);
3280 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3281 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3283 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3285 /* This puts it in the right list, and in the right order. */
3286 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3288 /* We don't need to redisplay the region covered by the overlay, because
3289 the overlay has no properties at the moment. */
3294 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3297 modify_overlay (buf
, start
, end
)
3307 start
= end
; end
= temp
;
3310 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3312 /* If this is a buffer not in the selected window,
3313 we must do other windows. */
3314 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3315 windows_or_buffers_changed
= 1;
3316 /* If multiple windows show this buffer, we must do other windows. */
3317 else if (buffer_shared
> 1)
3318 windows_or_buffers_changed
= 1;
3320 ++BUF_OVERLAY_MODIFF (buf
);
3324 Lisp_Object
Fdelete_overlay ();
3326 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3327 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3328 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3329 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3331 (overlay
, beg
, end
, buffer
)
3332 Lisp_Object overlay
, beg
, end
, buffer
;
3334 struct buffer
*b
, *ob
;
3335 Lisp_Object obuffer
;
3336 int count
= specpdl_ptr
- specpdl
;
3338 CHECK_OVERLAY (overlay
, 0);
3340 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3342 XSETBUFFER (buffer
, current_buffer
);
3343 CHECK_BUFFER (buffer
, 3);
3346 && ! EQ (Fmarker_buffer (beg
), buffer
))
3347 error ("Marker points into wrong buffer");
3349 && ! EQ (Fmarker_buffer (end
), buffer
))
3350 error ("Marker points into wrong buffer");
3352 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3353 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3355 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3356 return Fdelete_overlay (overlay
);
3358 if (XINT (beg
) > XINT (end
))
3361 temp
= beg
; beg
= end
; end
= temp
;
3364 specbind (Qinhibit_quit
, Qt
);
3366 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3367 b
= XBUFFER (buffer
);
3368 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3370 /* If the overlay has changed buffers, do a thorough redisplay. */
3371 if (!EQ (buffer
, obuffer
))
3373 /* Redisplay where the overlay was. */
3374 if (!NILP (obuffer
))
3379 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3380 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3382 modify_overlay (ob
, o_beg
, o_end
);
3385 /* Redisplay where the overlay is going to be. */
3386 modify_overlay (b
, XINT (beg
), XINT (end
));
3389 /* Redisplay the area the overlay has just left, or just enclosed. */
3393 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3394 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3396 if (o_beg
== XINT (beg
))
3397 modify_overlay (b
, o_end
, XINT (end
));
3398 else if (o_end
== XINT (end
))
3399 modify_overlay (b
, o_beg
, XINT (beg
));
3402 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3403 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3404 modify_overlay (b
, o_beg
, o_end
);
3408 if (!NILP (obuffer
))
3410 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3411 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3414 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3415 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3417 /* Put the overlay on the wrong list. */
3418 end
= OVERLAY_END (overlay
);
3419 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3420 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3422 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3424 /* This puts it in the right list, and in the right order. */
3425 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3427 return unbind_to (count
, overlay
);
3430 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3431 "Delete the overlay OVERLAY from its buffer.")
3433 Lisp_Object overlay
;
3437 int count
= specpdl_ptr
- specpdl
;
3439 CHECK_OVERLAY (overlay
, 0);
3441 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3445 b
= XBUFFER (buffer
);
3447 specbind (Qinhibit_quit
, Qt
);
3449 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3450 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3453 marker_position (OVERLAY_START (overlay
)),
3454 marker_position (OVERLAY_END (overlay
)));
3456 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3457 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3459 return unbind_to (count
, Qnil
);
3462 /* Overlay dissection functions. */
3464 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3465 "Return the position at which OVERLAY starts.")
3467 Lisp_Object overlay
;
3469 CHECK_OVERLAY (overlay
, 0);
3471 return (Fmarker_position (OVERLAY_START (overlay
)));
3474 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3475 "Return the position at which OVERLAY ends.")
3477 Lisp_Object overlay
;
3479 CHECK_OVERLAY (overlay
, 0);
3481 return (Fmarker_position (OVERLAY_END (overlay
)));
3484 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3485 "Return the buffer OVERLAY belongs to.")
3487 Lisp_Object overlay
;
3489 CHECK_OVERLAY (overlay
, 0);
3491 return Fmarker_buffer (OVERLAY_START (overlay
));
3494 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3495 "Return a list of the properties on OVERLAY.\n\
3496 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3499 Lisp_Object overlay
;
3501 CHECK_OVERLAY (overlay
, 0);
3503 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3507 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3508 "Return a list of the overlays that contain position POS.")
3513 Lisp_Object
*overlay_vec
;
3517 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3520 /* We can't use alloca here because overlays_at can call xrealloc. */
3521 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3523 /* Put all the overlays we want in a vector in overlay_vec.
3524 Store the length in len. */
3525 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3526 (int *) 0, (int *) 0, 0);
3528 /* Make a list of them all. */
3529 result
= Flist (noverlays
, overlay_vec
);
3531 xfree (overlay_vec
);
3535 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3536 "Return a list of the overlays that overlap the region BEG ... END.\n\
3537 Overlap means that at least one character is contained within the overlay\n\
3538 and also contained within the specified region.\n\
3539 Empty overlays are included in the result if they are located at BEG\n\
3540 or between BEG and END.")
3542 Lisp_Object beg
, end
;
3545 Lisp_Object
*overlay_vec
;
3549 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3550 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3553 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3555 /* Put all the overlays we want in a vector in overlay_vec.
3556 Store the length in len. */
3557 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3558 (int *) 0, (int *) 0);
3560 /* Make a list of them all. */
3561 result
= Flist (noverlays
, overlay_vec
);
3563 xfree (overlay_vec
);
3567 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3569 "Return the next position after POS where an overlay starts or ends.\n\
3570 If there are no more overlay boundaries after POS, return (point-max).")
3576 Lisp_Object
*overlay_vec
;
3580 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3583 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3585 /* Put all the overlays we want in a vector in overlay_vec.
3586 Store the length in len.
3587 endpos gets the position where the next overlay starts. */
3588 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3589 &endpos
, (int *) 0, 1);
3591 /* If any of these overlays ends before endpos,
3592 use its ending point instead. */
3593 for (i
= 0; i
< noverlays
; i
++)
3598 oend
= OVERLAY_END (overlay_vec
[i
]);
3599 oendpos
= OVERLAY_POSITION (oend
);
3600 if (oendpos
< endpos
)
3604 xfree (overlay_vec
);
3605 return make_number (endpos
);
3608 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3609 Sprevious_overlay_change
, 1, 1, 0,
3610 "Return the previous position before POS where an overlay starts or ends.\n\
3611 If there are no more overlay boundaries before POS, return (point-min).")
3617 Lisp_Object
*overlay_vec
;
3620 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3622 /* At beginning of buffer, we know the answer;
3623 avoid bug subtracting 1 below. */
3624 if (XINT (pos
) == BEGV
)
3628 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3630 /* Put all the overlays we want in a vector in overlay_vec.
3631 Store the length in len.
3632 prevpos gets the position of the previous change. */
3633 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3634 (int *) 0, &prevpos
, 1);
3636 xfree (overlay_vec
);
3637 return make_number (prevpos
);
3640 /* These functions are for debugging overlays. */
3642 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3643 "Return a pair of lists giving all the overlays of the current buffer.\n\
3644 The car has all the overlays before the overlay center;\n\
3645 the cdr has all the overlays after the overlay center.\n\
3646 Recentering overlays moves overlays between these lists.\n\
3647 The lists you get are copies, so that changing them has no effect.\n\
3648 However, the overlays you get are the real objects that the buffer uses.")
3651 Lisp_Object before
, after
;
3652 before
= current_buffer
->overlays_before
;
3654 before
= Fcopy_sequence (before
);
3655 after
= current_buffer
->overlays_after
;
3657 after
= Fcopy_sequence (after
);
3659 return Fcons (before
, after
);
3662 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3663 "Recenter the overlays of the current buffer around position POS.")
3667 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3669 recenter_overlay_lists (current_buffer
, XINT (pos
));
3673 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3674 "Get the property of overlay OVERLAY with property name PROP.")
3676 Lisp_Object overlay
, prop
;
3678 Lisp_Object plist
, fallback
;
3680 CHECK_OVERLAY (overlay
, 0);
3684 for (plist
= XOVERLAY (overlay
)->plist
;
3685 CONSP (plist
) && CONSP (XCDR (plist
));
3686 plist
= XCDR (XCDR (plist
)))
3688 if (EQ (XCAR (plist
), prop
))
3689 return XCAR (XCDR (plist
));
3690 else if (EQ (XCAR (plist
), Qcategory
))
3693 tem
= Fcar (Fcdr (plist
));
3695 fallback
= Fget (tem
, prop
);
3702 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3703 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3704 (overlay
, prop
, value
)
3705 Lisp_Object overlay
, prop
, value
;
3707 Lisp_Object tail
, buffer
;
3710 CHECK_OVERLAY (overlay
, 0);
3712 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3714 for (tail
= XOVERLAY (overlay
)->plist
;
3715 CONSP (tail
) && CONSP (XCDR (tail
));
3716 tail
= XCDR (XCDR (tail
)))
3717 if (EQ (XCAR (tail
), prop
))
3719 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3720 XCAR (XCDR (tail
)) = value
;
3723 /* It wasn't in the list, so add it to the front. */
3724 changed
= !NILP (value
);
3725 XOVERLAY (overlay
)->plist
3726 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3728 if (! NILP (buffer
))
3731 modify_overlay (XBUFFER (buffer
),
3732 marker_position (OVERLAY_START (overlay
)),
3733 marker_position (OVERLAY_END (overlay
)));
3734 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3735 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3736 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3737 Fdelete_overlay (overlay
);
3742 /* Subroutine of report_overlay_modification. */
3744 /* Lisp vector holding overlay hook functions to call.
3745 Vector elements come in pairs.
3746 Each even-index element is a list of hook functions.
3747 The following odd-index element is the overlay they came from.
3749 Before the buffer change, we fill in this vector
3750 as we call overlay hook functions.
3751 After the buffer change, we get the functions to call from this vector.
3752 This way we always call the same functions before and after the change. */
3753 static Lisp_Object last_overlay_modification_hooks
;
3755 /* Number of elements actually used in last_overlay_modification_hooks. */
3756 static int last_overlay_modification_hooks_used
;
3758 /* Add one functionlist/overlay pair
3759 to the end of last_overlay_modification_hooks. */
3762 add_overlay_mod_hooklist (functionlist
, overlay
)
3763 Lisp_Object functionlist
, overlay
;
3765 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3767 if (last_overlay_modification_hooks_used
== oldsize
)
3770 old
= last_overlay_modification_hooks
;
3771 last_overlay_modification_hooks
3772 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3773 bcopy (XVECTOR (old
)->contents
,
3774 XVECTOR (last_overlay_modification_hooks
)->contents
,
3775 sizeof (Lisp_Object
) * oldsize
);
3777 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3778 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3781 /* Run the modification-hooks of overlays that include
3782 any part of the text in START to END.
3783 If this change is an insertion, also
3784 run the insert-before-hooks of overlay starting at END,
3785 and the insert-after-hooks of overlay ending at START.
3787 This is called both before and after the modification.
3788 AFTER is nonzero when we call after the modification.
3790 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3791 When AFTER is nonzero, they are the start position,
3792 the position after the inserted new text,
3793 and the length of deleted or replaced old text. */
3796 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3797 Lisp_Object start
, end
;
3799 Lisp_Object arg1
, arg2
, arg3
;
3801 Lisp_Object prop
, overlay
, tail
;
3802 /* 1 if this change is an insertion. */
3803 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3805 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3809 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3813 /* Call the functions recorded in last_overlay_modification_hooks
3814 rather than scanning the overlays again.
3815 First copy the vector contents, in case some of these hooks
3816 do subsequent modification of the buffer. */
3817 int size
= last_overlay_modification_hooks_used
;
3818 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3821 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3822 copy
, size
* sizeof (Lisp_Object
));
3824 gcpro1
.nvars
= size
;
3826 for (i
= 0; i
< size
;)
3828 Lisp_Object prop
, overlay
;
3830 overlay
= copy
[i
++];
3831 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3837 /* We are being called before a change.
3838 Scan the overlays to find the functions to call. */
3839 last_overlay_modification_hooks_used
= 0;
3841 for (tail
= current_buffer
->overlays_before
;
3845 int startpos
, endpos
;
3846 Lisp_Object ostart
, oend
;
3848 overlay
= XCAR (tail
);
3850 ostart
= OVERLAY_START (overlay
);
3851 oend
= OVERLAY_END (overlay
);
3852 endpos
= OVERLAY_POSITION (oend
);
3853 if (XFASTINT (start
) > endpos
)
3855 startpos
= OVERLAY_POSITION (ostart
);
3856 if (insertion
&& (XFASTINT (start
) == startpos
3857 || XFASTINT (end
) == startpos
))
3859 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3862 /* Copy TAIL in case the hook recenters the overlay lists. */
3864 tail
= Fcopy_sequence (tail
);
3866 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3869 if (insertion
&& (XFASTINT (start
) == endpos
3870 || XFASTINT (end
) == endpos
))
3872 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3876 tail
= Fcopy_sequence (tail
);
3878 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3881 /* Test for intersecting intervals. This does the right thing
3882 for both insertion and deletion. */
3883 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3885 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3889 tail
= Fcopy_sequence (tail
);
3891 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3897 for (tail
= current_buffer
->overlays_after
;
3901 int startpos
, endpos
;
3902 Lisp_Object ostart
, oend
;
3904 overlay
= XCAR (tail
);
3906 ostart
= OVERLAY_START (overlay
);
3907 oend
= OVERLAY_END (overlay
);
3908 startpos
= OVERLAY_POSITION (ostart
);
3909 endpos
= OVERLAY_POSITION (oend
);
3910 if (XFASTINT (end
) < startpos
)
3912 if (insertion
&& (XFASTINT (start
) == startpos
3913 || XFASTINT (end
) == startpos
))
3915 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3919 tail
= Fcopy_sequence (tail
);
3921 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3924 if (insertion
&& (XFASTINT (start
) == endpos
3925 || XFASTINT (end
) == endpos
))
3927 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3931 tail
= Fcopy_sequence (tail
);
3933 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3936 /* Test for intersecting intervals. This does the right thing
3937 for both insertion and deletion. */
3938 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3940 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3944 tail
= Fcopy_sequence (tail
);
3946 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3955 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3956 Lisp_Object list
, overlay
;
3958 Lisp_Object arg1
, arg2
, arg3
;
3960 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3962 GCPRO4 (list
, arg1
, arg2
, arg3
);
3964 add_overlay_mod_hooklist (list
, overlay
);
3966 while (!NILP (list
))
3969 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3971 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3977 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3980 evaporate_overlays (pos
)
3983 Lisp_Object tail
, overlay
, hit_list
;
3986 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
3987 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
3991 overlay
= XCAR (tail
);
3992 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3995 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
3996 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3997 hit_list
= Fcons (overlay
, hit_list
);
4000 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4004 overlay
= XCAR (tail
);
4005 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4008 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4009 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4010 hit_list
= Fcons (overlay
, hit_list
);
4012 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4013 Fdelete_overlay (XCAR (hit_list
));
4016 /* Somebody has tried to store a value with an unacceptable type
4017 in the slot with offset OFFSET. */
4020 buffer_slot_type_mismatch (offset
)
4026 switch (XINT (PER_BUFFER_TYPE (offset
)))
4029 type_name
= "integers";
4033 type_name
= "strings";
4037 type_name
= "symbols";
4044 sym
= PER_BUFFER_SYMBOL (offset
);
4045 error ("Only %s should be stored in the buffer-local variable %s",
4046 type_name
, XSYMBOL (sym
)->name
->data
);
4055 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4057 /* Make sure all markable slots in buffer_defaults
4058 are initialized reasonably, so mark_buffer won't choke. */
4059 reset_buffer (&buffer_defaults
);
4060 reset_buffer_local_variables (&buffer_defaults
, 1);
4061 reset_buffer (&buffer_local_symbols
);
4062 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4063 /* Prevent GC from getting confused. */
4064 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4065 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4066 BUF_INTERVALS (&buffer_defaults
) = 0;
4067 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4068 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4069 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4071 /* Set up the default values of various buffer slots. */
4072 /* Must do these before making the first buffer! */
4074 /* real setup is done in bindings.el */
4075 buffer_defaults
.mode_line_format
= build_string ("%-");
4076 buffer_defaults
.header_line_format
= Qnil
;
4077 buffer_defaults
.abbrev_mode
= Qnil
;
4078 buffer_defaults
.overwrite_mode
= Qnil
;
4079 buffer_defaults
.case_fold_search
= Qt
;
4080 buffer_defaults
.auto_fill_function
= Qnil
;
4081 buffer_defaults
.selective_display
= Qnil
;
4083 buffer_defaults
.selective_display_ellipses
= Qt
;
4085 buffer_defaults
.abbrev_table
= Qnil
;
4086 buffer_defaults
.display_table
= Qnil
;
4087 buffer_defaults
.undo_list
= Qnil
;
4088 buffer_defaults
.mark_active
= Qnil
;
4089 buffer_defaults
.file_format
= Qnil
;
4090 buffer_defaults
.overlays_before
= Qnil
;
4091 buffer_defaults
.overlays_after
= Qnil
;
4092 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4094 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4095 buffer_defaults
.truncate_lines
= Qnil
;
4096 buffer_defaults
.ctl_arrow
= Qt
;
4097 buffer_defaults
.direction_reversed
= Qnil
;
4098 buffer_defaults
.cursor_type
= Qt
;
4099 buffer_defaults
.extra_line_spacing
= Qnil
;
4102 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4104 buffer_defaults
.enable_multibyte_characters
= Qt
;
4105 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4106 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4107 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4108 buffer_defaults
.cache_long_line_scans
= Qnil
;
4109 buffer_defaults
.file_truename
= Qnil
;
4110 XSETFASTINT (buffer_defaults
.display_count
, 0);
4111 buffer_defaults
.indicate_empty_lines
= Qnil
;
4112 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4113 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4114 buffer_defaults
.display_time
= Qnil
;
4116 /* Assign the local-flags to the slots that have default values.
4117 The local flag is a bit that is used in the buffer
4118 to say that it has its own local value for the slot.
4119 The local flag bits are in the local_var_flags slot of the buffer. */
4121 /* Nothing can work if this isn't true */
4122 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4124 /* 0 means not a lisp var, -1 means always local, else mask */
4125 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4126 XSETINT (buffer_local_flags
.filename
, -1);
4127 XSETINT (buffer_local_flags
.directory
, -1);
4128 XSETINT (buffer_local_flags
.backed_up
, -1);
4129 XSETINT (buffer_local_flags
.save_length
, -1);
4130 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4131 XSETINT (buffer_local_flags
.read_only
, -1);
4132 XSETINT (buffer_local_flags
.major_mode
, -1);
4133 XSETINT (buffer_local_flags
.mode_name
, -1);
4134 XSETINT (buffer_local_flags
.undo_list
, -1);
4135 XSETINT (buffer_local_flags
.mark_active
, -1);
4136 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4137 XSETINT (buffer_local_flags
.file_truename
, -1);
4138 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4139 XSETINT (buffer_local_flags
.file_format
, -1);
4140 XSETINT (buffer_local_flags
.display_count
, -1);
4141 XSETINT (buffer_local_flags
.display_time
, -1);
4142 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4145 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4146 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4147 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4148 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4149 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4150 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4152 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4154 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4155 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4156 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4157 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4158 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4159 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4160 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4162 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4163 /* Make this one a permanent local. */
4164 buffer_permanent_local_flags
[idx
++] = 1;
4166 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4167 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4168 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4169 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4170 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4171 /* Make this one a permanent local. */
4172 buffer_permanent_local_flags
[idx
++] = 1;
4173 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4174 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4175 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4176 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4177 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4178 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4179 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4180 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4182 /* Need more room? */
4183 if (idx
>= MAX_PER_BUFFER_VARS
)
4185 last_per_buffer_idx
= idx
;
4187 Vbuffer_alist
= Qnil
;
4191 QSFundamental
= build_string ("Fundamental");
4193 Qfundamental_mode
= intern ("fundamental-mode");
4194 buffer_defaults
.major_mode
= Qfundamental_mode
;
4196 Qmode_class
= intern ("mode-class");
4198 Qprotected_field
= intern ("protected-field");
4200 Qpermanent_local
= intern ("permanent-local");
4202 Qkill_buffer_hook
= intern ("kill-buffer-hook");
4204 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
4206 /* super-magic invisible buffer */
4207 Vbuffer_alist
= Qnil
;
4209 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4211 inhibit_modification_hooks
= 0;
4217 char buf
[MAXPATHLEN
+1];
4219 struct stat dotstat
, pwdstat
;
4223 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4224 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4225 Fset_buffer_multibyte (Qnil
);
4227 /* If PWD is accurate, use it instead of calling getwd. This is faster
4228 when PWD is right, and may avoid a fatal error. */
4229 if ((pwd
= getenv ("PWD")) != 0
4230 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4231 && stat (pwd
, &pwdstat
) == 0
4232 && stat (".", &dotstat
) == 0
4233 && dotstat
.st_ino
== pwdstat
.st_ino
4234 && dotstat
.st_dev
== pwdstat
.st_dev
4235 && strlen (pwd
) < MAXPATHLEN
)
4238 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4239 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4241 else if (getwd (buf
) == 0)
4242 fatal ("`getwd' failed: %s\n", buf
);
4246 /* Maybe this should really use some standard subroutine
4247 whose definition is filename syntax dependent. */
4249 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4251 buf
[rc
] = DIRECTORY_SEP
;
4254 #endif /* not VMS */
4256 current_buffer
->directory
= build_string (buf
);
4258 /* Add /: to the front of the name
4259 if it would otherwise be treated as magic. */
4260 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4262 /* If the default dir is just /, TEMP is non-nil
4263 because of the ange-ftp completion handler.
4264 However, it is not necessary to turn / into /:/.
4265 So avoid doing that. */
4266 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4267 current_buffer
->directory
4268 = concat2 (build_string ("/:"), current_buffer
->directory
);
4270 temp
= get_minibuffer (0);
4271 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4274 /* initialize the buffer routines */
4278 staticpro (&last_overlay_modification_hooks
);
4279 last_overlay_modification_hooks
4280 = Fmake_vector (make_number (10), Qnil
);
4282 staticpro (&Vbuffer_defaults
);
4283 staticpro (&Vbuffer_local_symbols
);
4284 staticpro (&Qfundamental_mode
);
4285 staticpro (&Qmode_class
);
4286 staticpro (&QSFundamental
);
4287 staticpro (&Vbuffer_alist
);
4288 staticpro (&Qprotected_field
);
4289 staticpro (&Qpermanent_local
);
4290 staticpro (&Qkill_buffer_hook
);
4291 Qoverlayp
= intern ("overlayp");
4292 staticpro (&Qoverlayp
);
4293 Qevaporate
= intern ("evaporate");
4294 staticpro (&Qevaporate
);
4295 Qmodification_hooks
= intern ("modification-hooks");
4296 staticpro (&Qmodification_hooks
);
4297 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4298 staticpro (&Qinsert_in_front_hooks
);
4299 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4300 staticpro (&Qinsert_behind_hooks
);
4301 Qget_file_buffer
= intern ("get-file-buffer");
4302 staticpro (&Qget_file_buffer
);
4303 Qpriority
= intern ("priority");
4304 staticpro (&Qpriority
);
4305 Qwindow
= intern ("window");
4306 staticpro (&Qwindow
);
4307 Qbefore_string
= intern ("before-string");
4308 staticpro (&Qbefore_string
);
4309 Qafter_string
= intern ("after-string");
4310 staticpro (&Qafter_string
);
4311 Qfirst_change_hook
= intern ("first-change-hook");
4312 staticpro (&Qfirst_change_hook
);
4313 Qbefore_change_functions
= intern ("before-change-functions");
4314 staticpro (&Qbefore_change_functions
);
4315 Qafter_change_functions
= intern ("after-change-functions");
4316 staticpro (&Qafter_change_functions
);
4318 Fput (Qprotected_field
, Qerror_conditions
,
4319 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4320 Fput (Qprotected_field
, Qerror_message
,
4321 build_string ("Attempt to modify a protected field"));
4323 /* All these use DEFVAR_LISP_NOPRO because the slots in
4324 buffer_defaults will all be marked via Vbuffer_defaults. */
4326 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4327 &buffer_defaults
.mode_line_format
,
4328 "Default value of `mode-line-format' for buffers that don't override it.\n\
4329 This is the same as (default-value 'mode-line-format).");
4331 DEFVAR_LISP_NOPRO ("default-header-line-format",
4332 &buffer_defaults
.header_line_format
,
4333 "Default value of `header-line-format' for buffers that don't override it.\n\
4334 This is the same as (default-value 'header-line-format).");
4336 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
4337 "Default value of `cursor-type' for buffers that don't override it.\n\
4338 This is the same as (default-value 'cursor-type).");
4340 DEFVAR_LISP_NOPRO ("default-line-spacing",
4341 &buffer_defaults
.extra_line_spacing
,
4342 "Default value of `line-spacing' for buffers that don't override it.\n\
4343 This is the same as (default-value 'line-spacing).");
4345 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4346 &buffer_defaults
.abbrev_mode
,
4347 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4348 This is the same as (default-value 'abbrev-mode).");
4350 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4351 &buffer_defaults
.ctl_arrow
,
4352 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4353 This is the same as (default-value 'ctl-arrow).");
4355 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4356 &buffer_defaults
.direction_reversed
,
4357 "Default value of `direction_reversed' for buffers that do not override it.\n\
4358 This is the same as (default-value 'direction-reversed).");
4360 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4361 &buffer_defaults
.enable_multibyte_characters
,
4362 "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4363 This is the same as (default-value 'enable-multibyte-characters).");
4365 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4366 &buffer_defaults
.buffer_file_coding_system
,
4367 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4368 This is the same as (default-value 'buffer-file-coding-system).");
4370 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4371 &buffer_defaults
.truncate_lines
,
4372 "Default value of `truncate-lines' for buffers that do not override it.\n\
4373 This is the same as (default-value 'truncate-lines).");
4375 DEFVAR_LISP_NOPRO ("default-fill-column",
4376 &buffer_defaults
.fill_column
,
4377 "Default value of `fill-column' for buffers that do not override it.\n\
4378 This is the same as (default-value 'fill-column).");
4380 DEFVAR_LISP_NOPRO ("default-left-margin",
4381 &buffer_defaults
.left_margin
,
4382 "Default value of `left-margin' for buffers that do not override it.\n\
4383 This is the same as (default-value 'left-margin).");
4385 DEFVAR_LISP_NOPRO ("default-tab-width",
4386 &buffer_defaults
.tab_width
,
4387 "Default value of `tab-width' for buffers that do not override it.\n\
4388 This is the same as (default-value 'tab-width).");
4390 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4391 &buffer_defaults
.case_fold_search
,
4392 "Default value of `case-fold-search' for buffers that don't override it.\n\
4393 This is the same as (default-value 'case-fold-search).");
4396 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4397 &buffer_defaults
.buffer_file_type
,
4398 "Default file type for buffers that do not override it.\n\
4399 This is the same as (default-value 'buffer-file-type).\n\
4400 The file type is nil for text, t for binary.");
4403 DEFVAR_LISP_NOPRO ("default-left-margin-width",
4404 &buffer_defaults
.left_margin_width
,
4405 "Default value of `left-margin-width' for buffers that don't override it.\n\
4406 This is the same as (default-value 'left-margin-width).");
4408 DEFVAR_LISP_NOPRO ("default-right-margin-width",
4409 &buffer_defaults
.right_margin_width
,
4410 "Default value of `right_margin_width' for buffers that don't override it.\n\
4411 This is the same as (default-value 'right-margin-width).");
4413 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
4414 &buffer_defaults
.indicate_empty_lines
,
4415 "Default value of `indicate-empty-lines' for buffers that don't override it.\n\
4416 This is the same as (default-value 'indicate-empty-lines).");
4418 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
4419 &buffer_defaults
.scroll_up_aggressively
,
4420 "Default value of `scroll-up-aggressively' for buffers that\n\
4421 don't override it. This is the same as (default-value\n\
4422 'scroll-up-aggressively).");
4424 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
4425 &buffer_defaults
.scroll_down_aggressively
,
4426 "Default value of `scroll-down-aggressively' for buffers that\n\
4427 don't override it. This is the same as (default-value\n\
4428 'scroll-down-aggressively).");
4430 DEFVAR_PER_BUFFER ("header-line-format",
4431 ¤t_buffer
->header_line_format
,
4433 "Analogous to `mode-line-format', but for a mode line displayed\n\
4434 at the top of windows.");
4436 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
4439 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
4440 But make-docfile finds it!
4441 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
4443 "Template for displaying mode line for current buffer.\n\
4444 Each buffer has its own value of this variable.\n\
4445 Value may be nil, a string, a symbol or a list or cons cell.\n\
4446 A value of nil means don't display a mode line.\n\
4447 For a symbol, its value is used (but it is ignored if t or nil).\n\
4448 A string appearing directly as the value of a symbol is processed verbatim\n\
4449 in that the %-constructs below are not recognized.\n\
4450 For a list of the form `(:eval FORM)', FORM is evaluated and the result\n\
4451 is used as a mode line element.\n\
4452 For a list whose car is a symbol, the symbol's value is taken,\n\
4453 and if that is non-nil, the cadr of the list is processed recursively.\n\
4454 Otherwise, the caddr of the list (if there is one) is processed.\n\
4455 For a list whose car is a string or list, each element is processed\n\
4456 recursively and the results are effectively concatenated.\n\
4457 For a list whose car is an integer, the cdr of the list is processed\n\
4458 and padded (if the number is positive) or truncated (if negative)\n\
4459 to the width specified by that number.\n\
4460 A string is printed verbatim in the mode line except for %-constructs:\n\
4461 (%-constructs are allowed when the string is the entire mode-line-format\n\
4462 or when it is found in a cons-cell or a list)\n\
4463 %b -- print buffer name. %f -- print visited file name.\n\
4464 %F -- print frame name.\n\
4465 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
4466 %& is like %*, but ignore read-only-ness.\n\
4467 % means buffer is read-only and * means it is modified.\n\
4468 For a modified read-only buffer, %* gives % and %+ gives *.\n\
4469 %s -- print process status. %l -- print the current line number.\n\
4470 %c -- print the current column number (this makes editing slower).\n\
4471 To make the column number update correctly in all cases,\n\
4472 `column-number-mode' must be non-nil.\n\
4473 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
4474 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
4475 or print Bottom or All.\n\
4476 %m -- print the mode name.\n\
4477 %n -- print Narrow if appropriate.\n\
4478 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.\n\
4479 %Z -- like %z, but including the end-of-line format.\n\
4480 %[ -- print one [ for each recursive editing level. %] similar.\n\
4481 %% -- print %. %- -- print infinitely many dashes.\n\
4482 Decimal digits after the % specify field width to which to pad.");
4485 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
4486 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
4487 nil here means use current buffer's major mode.");
4489 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
4490 make_number (Lisp_Symbol
),
4491 "Symbol for current buffer's major mode.");
4493 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
4494 make_number (Lisp_String
),
4495 "Pretty name of current buffer's major mode (a string).");
4497 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
4498 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
4499 Automatically becomes buffer-local when set in any fashion.");
4501 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
4503 "*Non-nil if searches and matches should ignore case.\n\
4504 Automatically becomes buffer-local when set in any fashion.");
4506 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
4507 make_number (Lisp_Int
),
4508 "*Column beyond which automatic line-wrapping should happen.\n\
4509 Automatically becomes buffer-local when set in any fashion.");
4511 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
4512 make_number (Lisp_Int
),
4513 "*Column for the default indent-line-function to indent to.\n\
4514 Linefeed indents to this column in Fundamental mode.\n\
4515 Automatically becomes buffer-local when set in any fashion.");
4517 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
4518 make_number (Lisp_Int
),
4519 "*Distance between tab stops (for display of tab characters), in columns.\n\
4520 Automatically becomes buffer-local when set in any fashion.");
4522 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
4523 "*Non-nil means display control chars with uparrow.\n\
4524 A value of nil means use backslash and octal digits.\n\
4525 Automatically becomes buffer-local when set in any fashion.\n\
4526 This variable does not apply to characters whose display is specified\n\
4527 in the current display table (if there is one).");
4529 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
4530 ¤t_buffer
->enable_multibyte_characters
,
4532 "Non-nil means the buffer contents are regarded as multi-byte characters.\n\
4533 Otherwise they are regarded as unibyte. This affects the display,\n\
4534 file I/O and the behavior of various editing commands.\n\
4536 This variable is buffer-local but you cannot set it directly;\n\
4537 use the function `set-buffer-multibyte' to change a buffer's representation.\n\
4538 Changing its default value with `setq-default' is supported.\n\
4539 See also variable `default-enable-multibyte-characters' and Info node\n\
4540 `(elisp)Text Representations'.");
4542 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
4543 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
4544 "Coding system to be used for encoding the buffer contents on saving.\n\
4545 This variable applies to saving the buffer, and also to `write-region'\n\
4546 and other functions that use `write-region'.\n\
4547 It does not apply to sending output to subprocesses, however.\n\
4549 If this is nil, the buffer is saved without any code conversion\n\
4550 unless some coding system is specified in `file-coding-system-alist'\n\
4551 for the buffer file.\n\
4553 The variable `coding-system-for-write', if non-nil, overrides this variable.\n\
4555 This variable is never applied to a way of decoding\n\
4556 a file while reading it.");
4558 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
4560 "*Non-nil means lines in the buffer are displayed right to left.");
4562 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
4563 "*Non-nil means do not display continuation lines;\n\
4564 give each line of text one screen line.\n\
4565 Automatically becomes buffer-local when set in any fashion.\n\
4567 Note that this is overridden by the variable\n\
4568 `truncate-partial-width-windows' if that variable is non-nil\n\
4569 and this buffer is not full-frame width.");
4572 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
4574 "Non-nil if the visited file is a binary file.\n\
4575 This variable is meaningful on MS-DOG and Windows NT.\n\
4576 On those systems, it is automatically local in every buffer.\n\
4577 On other systems, this variable is normally always nil.");
4580 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
4581 make_number (Lisp_String
),
4582 "Name of default directory of current buffer. Should end with slash.\n\
4583 Each buffer has its own value of this variable.");
4585 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
4587 "Function called (if non-nil) to perform auto-fill.\n\
4588 It is called after self-inserting any character specified in\n\
4589 the `auto-fill-chars' table.\n\
4590 Each buffer has its own value of this variable.\n\
4591 NOTE: This variable is not a hook;\n\
4592 its value may not be a list of functions.");
4594 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
4595 make_number (Lisp_String
),
4596 "Name of file visited in current buffer, or nil if not visiting a file.\n\
4597 Each buffer has its own value of this variable.");
4599 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
4600 make_number (Lisp_String
),
4601 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
4602 The truename of a file is calculated by `file-truename'\n\
4603 and then abbreviated with `abbreviate-file-name'.\n\
4604 Each buffer has its own value of this variable.");
4606 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
4607 ¤t_buffer
->auto_save_file_name
,
4608 make_number (Lisp_String
),
4609 "Name of file for auto-saving current buffer,\n\
4610 or nil if buffer should not be auto-saved.\n\
4611 Each buffer has its own value of this variable.");
4613 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
4614 "Non-nil if this buffer is read-only.\n\
4615 Each buffer has its own value of this variable.");
4617 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
4618 "Non-nil if this buffer's file has been backed up.\n\
4619 Backing up is done before the first time the file is saved.\n\
4620 Each buffer has its own value of this variable.");
4622 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
4623 make_number (Lisp_Int
),
4624 "Length of current buffer when last read in, saved or auto-saved.\n\
4626 Each buffer has its own value of this variable.");
4628 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
4630 "Non-nil enables selective display:\n\
4631 Integer N as value means display only lines\n\
4632 that start with less than n columns of space.\n\
4633 A value of t means, after a ^M, all the rest of the line is invisible.\n\
4634 Then ^M's in the file are written into files as newlines.\n\n\
4635 Automatically becomes buffer-local when set in any fashion.");
4638 DEFVAR_PER_BUFFER ("selective-display-ellipses",
4639 ¤t_buffer
->selective_display_ellipses
,
4641 "t means display ... on previous line when a line is invisible.\n\
4642 Automatically becomes buffer-local when set in any fashion.");
4645 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
4646 "Non-nil if self-insertion should replace existing text.\n\
4647 The value should be one of `overwrite-mode-textual',\n\
4648 `overwrite-mode-binary', or nil.\n\
4649 If it is `overwrite-mode-textual', self-insertion still\n\
4650 inserts at the end of a line, and inserts when point is before a tab,\n\
4651 until the tab is filled in.\n\
4652 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
4653 Automatically becomes buffer-local when set in any fashion.");
4655 #if 0 /* The doc string is too long for some compilers,
4656 but make-docfile can find it in this comment. */
4657 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4659 "Display table that controls display of the contents of current buffer.\n\
4660 Automatically becomes buffer-local when set in any fashion.\n\
4661 The display table is a char-table created with `make-display-table'.\n\
4662 The ordinary char-table elements control how to display each possible text\n\
4663 character. Each value should be a vector of characters or nil;\n\
4664 nil means display the character in the default fashion.\n\
4665 There are six extra slots to control the display of\n\
4666 the end of a truncated screen line (extra-slot 0, a single character);\n\
4667 the end of a continued line (extra-slot 1, a single character);\n\
4668 the escape character used to display character codes in octal\n\
4669 (extra-slot 2, a single character);\n\
4670 the character used as an arrow for control characters (extra-slot 3,\n\
4671 a single character);\n\
4672 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
4673 a vector of characters);\n\
4674 the character used to draw the border between side-by-side windows\n\
4675 (extra-slot 5, a single character).\n\
4676 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
4677 If this variable is nil, the value of `standard-display-table' is used.\n\
4678 Each window can have its own, overriding display table.");
4680 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
4683 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
4685 "*Width of left marginal area for display of a buffer.\n\
4686 Automatically becomes buffer-local when set in any fashion.\n\
4687 A value of nil means no marginal area.");
4689 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
4691 "*Width of right marginal area for display of a buffer.\n\
4692 Automatically becomes buffer-local when set in any fashion.\n\
4693 A value of nil means no marginal area.");
4695 DEFVAR_PER_BUFFER ("indicate-empty-lines",
4696 ¤t_buffer
->indicate_empty_lines
, Qnil
,
4697 "*Visually indicate empty lines after the buffer end.\n\
4698 If non-nil, a bitmap is displayed in the left fringe of a window on\n\
4700 Automatically becomes buffer-local when set in any fashion.\n");
4702 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
4703 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
4704 "*If a number, scroll display up aggressively.\n\
4705 If scrolling a window because point is above the window start, choose\n\
4706 a new window start so that point ends up that fraction of the window's\n\
4707 height from the bottom of the window.\n\
4708 Automatically becomes buffer-local when set in any fashion.");
4710 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
4711 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
4712 "*If a number, scroll display down aggressively.\n\
4713 If scrolling a window because point is below the window end, choose\n\
4714 a new window start so that point ends up that fraction of the window's\n\
4715 height from the top of the window.\n\
4716 Automatically becomes buffer-local when set in any fashion.");
4718 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
4722 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
4723 "List of functions to call before each text change.\n\
4724 Two arguments are passed to each function: the positions of\n\
4725 the beginning and end of the range of old text to be changed.\n\
4726 \(For an insertion, the beginning and end are at the same place.)\n\
4727 No information is given about the length of the text after the change.\n\
4729 Buffer changes made while executing the `before-change-functions'\n\
4730 don't call any before-change or after-change functions.\n\
4731 That's because these variables are temporarily set to nil.\n\
4732 As a result, a hook function cannot straightforwardly alter the value of\n\
4733 these variables. See the Emacs Lisp manual for a way of\n\
4734 accomplishing an equivalent result by using other variables.\n\
4736 If an unhandled error happens in running these functions,\n\
4737 the variable's value remains nil. That prevents the error\n\
4738 from happening repeatedly and making Emacs nonfunctional.");
4739 Vbefore_change_functions
= Qnil
;
4741 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
4742 "List of function to call after each text change.\n\
4743 Three arguments are passed to each function: the positions of\n\
4744 the beginning and end of the range of changed text,\n\
4745 and the length in bytes of the pre-change text replaced by that range.\n\
4746 \(For an insertion, the pre-change length is zero;\n\
4747 for a deletion, that length is the number of bytes deleted,\n\
4748 and the post-change beginning and end are at the same place.)\n\
4750 Buffer changes made while executing the `after-change-functions'\n\
4751 don't call any before-change or after-change functions.\n\
4752 That's because these variables are temporarily set to nil.\n\
4753 As a result, a hook function cannot straightforwardly alter the value of\n\
4754 these variables. See the Emacs Lisp manual for a way of\n\
4755 accomplishing an equivalent result by using other variables.\n\
4757 If an unhandled error happens in running these functions,\n\
4758 the variable's value remains nil. That prevents the error\n\
4759 from happening repeatedly and making Emacs nonfunctional.");
4760 Vafter_change_functions
= Qnil
;
4762 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
4763 "A list of functions to call before changing a buffer which is unmodified.\n\
4764 The functions are run using the `run-hooks' function.");
4765 Vfirst_change_hook
= Qnil
;
4767 #if 0 /* The doc string is too long for some compilers,
4768 but make-docfile can find it in this comment. */
4769 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4770 "List of undo entries in current buffer.\n\
4771 This variable is always local in all buffers.\n\
4772 Recent changes come first; older changes follow newer.\n\
4774 An entry (BEG . END) represents an insertion which begins at\n\
4775 position BEG and ends at position END.\n\
4777 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
4778 from (abs POSITION). If POSITION is positive, point was at the front\n\
4779 of the text being deleted; if negative, point was at the end.\n\
4781 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
4782 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
4783 of the visited file's modification time, as of that time. If the\n\
4784 modification time of the most recent save is different, this entry is\n\
4787 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
4788 was modified between BEG and END. PROPERTY is the property name,\n\
4789 and VALUE is the old value.\n\
4791 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
4792 was adjusted in position by the offset DISTANCE (an integer).\n\
4794 An entry of the form POSITION indicates that point was at the buffer\n\
4795 location given by the integer. Undoing an entry of this form places\n\
4796 point at POSITION.\n\
4798 nil marks undo boundaries. The undo command treats the changes\n\
4799 between two undo boundaries as a single step to be undone.\n\
4801 If the value of the variable is t, undo information is not recorded.");
4803 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
4806 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
4807 "Non-nil means the mark and region are currently active in this buffer.\n\
4808 Automatically local in all buffers.");
4810 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
4811 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
4812 This variable is buffer-local, in all buffers.\n\
4814 Normally, the line-motion functions work by scanning the buffer for\n\
4815 newlines. Columnar operations (like move-to-column and\n\
4816 compute-motion) also work by scanning the buffer, summing character\n\
4817 widths as they go. This works well for ordinary text, but if the\n\
4818 buffer's lines are very long (say, more than 500 characters), these\n\
4819 motion functions will take longer to execute. Emacs may also take\n\
4820 longer to update the display.\n\
4822 If cache-long-line-scans is non-nil, these motion functions cache the\n\
4823 results of their scans, and consult the cache to avoid rescanning\n\
4824 regions of the buffer until the text is modified. The caches are most\n\
4825 beneficial when they prevent the most searching---that is, when the\n\
4826 buffer contains long lines and large regions of characters with the\n\
4827 same, fixed screen width.\n\
4829 When cache-long-line-scans is non-nil, processing short lines will\n\
4830 become slightly slower (because of the overhead of consulting the\n\
4831 cache), and the caches will use memory roughly proportional to the\n\
4832 number of newlines and characters whose screen width varies.\n\
4834 The caches require no explicit maintenance; their accuracy is\n\
4835 maintained internally by the Emacs primitives. Enabling or disabling\n\
4836 the cache should not affect the behavior of any of the motion\n\
4837 functions; it should only affect their performance.");
4839 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
4840 "Value of point before the last series of scroll operations, or nil.\n\
4841 This variable is always local in all buffers.");
4843 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
4844 "List of formats to use when saving this buffer.\n\
4845 This variable is always local in all buffers.\n\
4846 Formats are defined by `format-alist'. This variable is\n\
4847 set when a file is visited. Automatically local in all buffers.");
4849 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
4850 ¤t_buffer
->invisibility_spec
, Qnil
,
4851 "Invisibility spec of this buffer.\n\
4852 This variable is always local in all buffers.\n\
4853 The default is t, which means that text is invisible\n\
4854 if it has a non-nil `invisible' property.\n\
4855 If the value is a list, a text character is invisible if its `invisible'\n\
4856 property is an element in that list.\n\
4857 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
4858 then characters with property value PROP are invisible,\n\
4859 and they have an ellipsis as well if ELLIPSIS is non-nil.");
4861 DEFVAR_PER_BUFFER ("buffer-display-count",
4862 ¤t_buffer
->display_count
, Qnil
,
4863 "A number incremented each time this buffer is displayed in a window.\n\
4864 This variable is always local in all buffers.\n\
4865 The function `set-window-buffer increments it.");
4867 DEFVAR_PER_BUFFER ("buffer-display-time",
4868 ¤t_buffer
->display_time
, Qnil
,
4869 "Time stamp updated each time this buffer is displayed in a window.\n\
4870 This variable is always local in all buffers.\n\
4871 The function `set-window-buffer' updates this variable\n\
4872 to the value obtained by calling `current-time'.\n\
4873 If the buffer has never been shown in a window, the value is nil.");
4875 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
4876 "*Non-nil means deactivate the mark when the buffer contents change.\n\
4877 Non-nil also enables highlighting of the region whenever the mark is active.\n\
4878 The variable `highlight-nonselected-windows' controls whether to highlight\n\
4879 all windows or just the selected window.");
4880 Vtransient_mark_mode
= Qnil
;
4882 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
4883 "*Non-nil means disregard read-only status of buffers or characters.\n\
4884 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
4885 text properties. If the value is a list, disregard `buffer-read-only'\n\
4886 and disregard a `read-only' text property if the property value\n\
4887 is a member of the list.");
4888 Vinhibit_read_only
= Qnil
;
4890 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
4891 "Cursor to use in window displaying this buffer.\n\
4892 Values are interpreted as follows:\n\
4894 t use the cursor specified for the frame\n\
4895 nil don't display a cursor\n\
4896 `bar' display a bar cursor with default width\n\
4897 (bar . WIDTH) display a bar cursor with width WIDTH\n\
4898 others display a box cursor.");
4900 DEFVAR_PER_BUFFER ("line-spacing",
4901 ¤t_buffer
->extra_line_spacing
, Qnil
,
4902 "Additional space to put between lines when displaying a buffer.\n\
4903 The space is measured in pixels, and put below lines on window systems.");
4905 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
4906 "List of functions called with no args to query before killing a buffer.");
4907 Vkill_buffer_query_functions
= Qnil
;
4909 defsubr (&Sbuffer_live_p
);
4910 defsubr (&Sbuffer_list
);
4911 defsubr (&Sget_buffer
);
4912 defsubr (&Sget_file_buffer
);
4913 defsubr (&Sget_buffer_create
);
4914 defsubr (&Smake_indirect_buffer
);
4915 defsubr (&Sgenerate_new_buffer_name
);
4916 defsubr (&Sbuffer_name
);
4917 /*defsubr (&Sbuffer_number);*/
4918 defsubr (&Sbuffer_file_name
);
4919 defsubr (&Sbuffer_base_buffer
);
4920 defsubr (&Sbuffer_local_variables
);
4921 defsubr (&Sbuffer_modified_p
);
4922 defsubr (&Sset_buffer_modified_p
);
4923 defsubr (&Sbuffer_modified_tick
);
4924 defsubr (&Srename_buffer
);
4925 defsubr (&Sother_buffer
);
4926 defsubr (&Sbuffer_disable_undo
);
4927 defsubr (&Sbuffer_enable_undo
);
4928 defsubr (&Skill_buffer
);
4929 defsubr (&Sset_buffer_major_mode
);
4930 defsubr (&Sswitch_to_buffer
);
4931 defsubr (&Spop_to_buffer
);
4932 defsubr (&Scurrent_buffer
);
4933 defsubr (&Sset_buffer
);
4934 defsubr (&Sbarf_if_buffer_read_only
);
4935 defsubr (&Sbury_buffer
);
4936 defsubr (&Serase_buffer
);
4937 defsubr (&Sset_buffer_multibyte
);
4938 defsubr (&Skill_all_local_variables
);
4940 defsubr (&Soverlayp
);
4941 defsubr (&Smake_overlay
);
4942 defsubr (&Sdelete_overlay
);
4943 defsubr (&Smove_overlay
);
4944 defsubr (&Soverlay_start
);
4945 defsubr (&Soverlay_end
);
4946 defsubr (&Soverlay_buffer
);
4947 defsubr (&Soverlay_properties
);
4948 defsubr (&Soverlays_at
);
4949 defsubr (&Soverlays_in
);
4950 defsubr (&Snext_overlay_change
);
4951 defsubr (&Sprevious_overlay_change
);
4952 defsubr (&Soverlay_recenter
);
4953 defsubr (&Soverlay_lists
);
4954 defsubr (&Soverlay_get
);
4955 defsubr (&Soverlay_put
);
4956 defsubr (&Srestore_buffer_modified_p
);
4962 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
4963 initial_define_key (control_x_map
, 'k', "kill-buffer");
4965 /* This must not be in syms_of_buffer, because Qdisabled is not
4966 initialized when that function gets called. */
4967 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);