1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 02, 2003
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>
35 /* in 4.1, param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
44 #include "intervals.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 struct buffer buffer_defaults
;
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure is negative, then even though there may
93 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
94 and the corresponding slot in buffer_defaults is not used.
96 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
97 zero, that is a bug */
99 struct buffer buffer_local_flags
;
101 /* This structure holds the names of symbols whose values may be
102 buffer-local. It is indexed and accessed in the same way as the above. */
104 struct buffer buffer_local_symbols
;
105 /* A Lisp_Object pointer to the above, used for staticpro */
106 static Lisp_Object Vbuffer_local_symbols
;
108 /* This structure holds the required types for the values in the
109 buffer-local slots. If a slot contains Qnil, then the
110 corresponding buffer slot may contain a value of any type. If a
111 slot contains an integer, then prospective values' tags must be
112 equal to that integer (except nil is always allowed).
113 When a tag does not match, the function
114 buffer_slot_type_mismatch will signal an error.
116 If a slot here contains -1, the corresponding variable is read-only. */
117 struct buffer buffer_local_types
;
119 /* Flags indicating which built-in buffer-local variables
120 are permanent locals. */
121 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
123 /* Number of per-buffer variables used. */
125 int last_per_buffer_idx
;
127 Lisp_Object
Fset_buffer ();
128 void set_buffer_internal ();
129 void set_buffer_internal_1 ();
130 static void call_overlay_mod_hooks ();
131 static void swap_out_buffer_local_variables ();
132 static void reset_buffer_local_variables ();
134 /* Alist of all buffer names vs the buffers. */
135 /* This used to be a variable, but is no longer,
136 to prevent lossage due to user rplac'ing this alist or its elements. */
137 Lisp_Object Vbuffer_alist
;
139 /* Functions to call before and after each text change. */
140 Lisp_Object Vbefore_change_functions
;
141 Lisp_Object Vafter_change_functions
;
143 Lisp_Object Vtransient_mark_mode
;
145 /* t means ignore all read-only text properties.
146 A list means ignore such a property if its value is a member of the list.
147 Any non-nil value means ignore buffer-read-only. */
148 Lisp_Object Vinhibit_read_only
;
150 /* List of functions to call that can query about killing a buffer.
151 If any of these functions returns nil, we don't kill it. */
152 Lisp_Object Vkill_buffer_query_functions
;
153 Lisp_Object Qkill_buffer_query_functions
;
155 /* List of functions to call before changing an unmodified buffer. */
156 Lisp_Object Vfirst_change_hook
;
158 Lisp_Object Qfirst_change_hook
;
159 Lisp_Object Qbefore_change_functions
;
160 Lisp_Object Qafter_change_functions
;
161 Lisp_Object Qucs_set_table_for_input
;
163 /* If nonzero, all modification hooks are suppressed. */
164 int inhibit_modification_hooks
;
166 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
168 Lisp_Object Qprotected_field
;
170 Lisp_Object QSFundamental
; /* A string "Fundamental" */
172 Lisp_Object Qkill_buffer_hook
;
174 Lisp_Object Qget_file_buffer
;
176 Lisp_Object Qoverlayp
;
178 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
180 Lisp_Object Qmodification_hooks
;
181 Lisp_Object Qinsert_in_front_hooks
;
182 Lisp_Object Qinsert_behind_hooks
;
184 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
185 static void free_buffer_text
P_ ((struct buffer
*b
));
186 static Lisp_Object copy_overlays
P_ ((struct buffer
*, Lisp_Object
));
187 static void modify_overlay
P_ ((struct buffer
*, int, int));
190 /* For debugging; temporary. See set_buffer_internal. */
191 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
198 error ("No buffer named %s", SDATA (spec
));
199 error ("Invalid buffer argument");
202 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
203 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
204 Value is nil if OBJECT is not a buffer or if it has been killed. */)
208 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
212 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
213 doc
: /* Return a list of all existing live buffers.
214 If the optional arg FRAME is a frame, we return the buffer list
215 in the proper order for that frame: the buffers in FRAME's `buffer-list'
216 frame parameter come first, followed by the rest of the buffers. */)
220 Lisp_Object framelist
, general
;
221 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
229 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
231 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
233 while (! NILP (tail
))
235 general
= Fdelq (XCAR (tail
), general
);
238 return nconc2 (framelist
, general
);
244 /* Like Fassoc, but use Fstring_equal to compare
245 (which ignores text properties),
246 and don't ever QUIT. */
249 assoc_ignore_text_properties (key
, list
)
250 register Lisp_Object key
;
253 register Lisp_Object tail
;
254 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
256 register Lisp_Object elt
, tem
;
258 tem
= Fstring_equal (Fcar (elt
), key
);
265 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
266 doc
: /* Return the buffer named NAME (a string).
267 If there is no live buffer named NAME, return nil.
268 NAME may also be a buffer; if so, the value is that buffer. */)
270 register Lisp_Object name
;
276 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
279 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
280 doc
: /* Return the buffer visiting file FILENAME (a string).
281 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
282 If there is no such live buffer, return nil.
283 See also `find-buffer-visiting'. */)
285 register Lisp_Object filename
;
287 register Lisp_Object tail
, buf
, tem
;
290 CHECK_STRING (filename
);
291 filename
= Fexpand_file_name (filename
, Qnil
);
293 /* If the file name has special constructs in it,
294 call the corresponding file handler. */
295 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
297 return call2 (handler
, Qget_file_buffer
, filename
);
299 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
301 buf
= Fcdr (XCAR (tail
));
302 if (!BUFFERP (buf
)) continue;
303 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
304 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
312 get_truename_buffer (filename
)
313 register Lisp_Object filename
;
315 register Lisp_Object tail
, buf
, tem
;
317 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
319 buf
= Fcdr (XCAR (tail
));
320 if (!BUFFERP (buf
)) continue;
321 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
322 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
329 /* Incremented for each buffer created, to assign the buffer number. */
332 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
333 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
334 A new buffer is created if there is no live buffer named NAME.
335 If NAME starts with a space, the new buffer does not keep undo information.
336 If NAME is a buffer instead of a string, then it is the value returned.
337 The value is never nil. */)
339 register Lisp_Object name
;
341 register Lisp_Object buf
;
342 register struct buffer
*b
;
344 buf
= Fget_buffer (name
);
348 if (SCHARS (name
) == 0)
349 error ("Empty string for buffer name is not allowed");
351 b
= (struct buffer
*) allocate_buffer ();
353 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
355 /* An ordinary buffer uses its own struct buffer_text. */
356 b
->text
= &b
->own_text
;
359 BUF_GAP_SIZE (b
) = 20;
361 /* We allocate extra 1-byte at the tail and keep it always '\0' for
362 anchoring a search. */
363 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
365 if (! BUF_BEG_ADDR (b
))
366 buffer_memory_full ();
373 BUF_PT_BYTE (b
) = BEG_BYTE
;
374 BUF_GPT_BYTE (b
) = BEG_BYTE
;
375 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
376 BUF_ZV_BYTE (b
) = BEG_BYTE
;
377 BUF_Z_BYTE (b
) = BEG_BYTE
;
379 BUF_OVERLAY_MODIFF (b
) = 1;
380 BUF_SAVE_MODIFF (b
) = 1;
381 BUF_INTERVALS (b
) = 0;
382 BUF_UNCHANGED_MODIFIED (b
) = 1;
383 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
384 BUF_END_UNCHANGED (b
) = 0;
385 BUF_BEG_UNCHANGED (b
) = 0;
386 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
388 b
->newline_cache
= 0;
389 b
->width_run_cache
= 0;
390 b
->width_table
= Qnil
;
391 b
->prevent_redisplay_optimizations_p
= 1;
393 /* Put this on the chain of all buffers including killed ones. */
394 b
->next
= all_buffers
;
397 /* An ordinary buffer normally doesn't need markers
398 to handle BEGV and ZV. */
400 b
->begv_marker
= Qnil
;
403 name
= Fcopy_sequence (name
);
404 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
407 if (SREF (name
, 0) != ' ')
413 reset_buffer_local_variables (b
, 1);
415 b
->mark
= Fmake_marker ();
416 BUF_MARKERS (b
) = Qnil
;
419 /* Put this in the alist of all live buffers. */
421 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
423 /* Fixme: Protect against errors, which would trigger infinite
425 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
426 /* buff is on buffer-alist, so no gcpro */
427 call1 (Qucs_set_table_for_input
, buf
);
433 /* Return a list of overlays which is a copy of the overlay list
434 LIST, but for buffer B. */
437 copy_overlays (b
, list
)
441 Lisp_Object result
, buffer
;
443 XSETBUFFER (buffer
, b
);
445 for (result
= Qnil
; CONSP (list
); list
= XCDR (list
))
447 Lisp_Object overlay
, start
, end
, old_overlay
;
450 old_overlay
= XCAR (list
);
451 charpos
= marker_position (OVERLAY_START (old_overlay
));
452 start
= Fmake_marker ();
453 Fset_marker (start
, make_number (charpos
), buffer
);
454 XMARKER (start
)->insertion_type
455 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
457 charpos
= marker_position (OVERLAY_END (old_overlay
));
458 end
= Fmake_marker ();
459 Fset_marker (end
, make_number (charpos
), buffer
);
460 XMARKER (end
)->insertion_type
461 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
463 overlay
= allocate_misc ();
464 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
465 OVERLAY_START (overlay
) = start
;
466 OVERLAY_END (overlay
) = end
;
467 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
469 result
= Fcons (overlay
, result
);
472 return Fnreverse (result
);
476 /* Clone per-buffer values of buffer FROM.
478 Buffer TO gets the same per-buffer values as FROM, with the
479 following exceptions: (1) TO's name is left untouched, (2) markers
480 are copied and made to refer to TO, and (3) overlay lists are
484 clone_per_buffer_values (from
, to
)
485 struct buffer
*from
, *to
;
487 Lisp_Object to_buffer
;
490 XSETBUFFER (to_buffer
, to
);
492 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
494 offset
+= sizeof (Lisp_Object
))
498 obj
= PER_BUFFER_VALUE (from
, offset
);
501 struct Lisp_Marker
*m
= XMARKER (obj
);
502 obj
= Fmake_marker ();
503 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
504 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
507 PER_BUFFER_VALUE (to
, offset
) = obj
;
510 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
512 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
513 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
517 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
519 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
520 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
521 BASE-BUFFER should be an existing buffer (or buffer name).
522 NAME should be a string which is not the name of an existing buffer.
523 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
524 such as major and minor modes, in the indirect buffer.
525 CLONE nil means the indirect buffer's state is reset to default values. */)
526 (base_buffer
, name
, clone
)
527 Lisp_Object base_buffer
, name
, clone
;
532 buf
= Fget_buffer (name
);
534 error ("Buffer name `%s' is in use", SDATA (name
));
536 base_buffer
= Fget_buffer (base_buffer
);
537 if (NILP (base_buffer
))
538 error ("No such buffer: `%s'", SDATA (name
));
540 if (SCHARS (name
) == 0)
541 error ("Empty string for buffer name is not allowed");
543 b
= (struct buffer
*) allocate_buffer ();
544 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
546 if (XBUFFER (base_buffer
)->base_buffer
)
547 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
549 b
->base_buffer
= XBUFFER (base_buffer
);
551 /* Use the base buffer's text object. */
552 b
->text
= b
->base_buffer
->text
;
554 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
555 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
556 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
557 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
558 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
559 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
561 b
->newline_cache
= 0;
562 b
->width_run_cache
= 0;
563 b
->width_table
= Qnil
;
565 /* Put this on the chain of all buffers including killed ones. */
566 b
->next
= all_buffers
;
569 name
= Fcopy_sequence (name
);
570 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
574 reset_buffer_local_variables (b
, 1);
576 /* Put this in the alist of all live buffers. */
578 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
580 b
->mark
= Fmake_marker ();
583 /* The multibyte status belongs to the base buffer. */
584 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
586 /* Make sure the base buffer has markers for its narrowing. */
587 if (NILP (b
->base_buffer
->pt_marker
))
589 b
->base_buffer
->pt_marker
= Fmake_marker ();
590 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
591 BUF_PT (b
->base_buffer
),
592 BUF_PT_BYTE (b
->base_buffer
));
594 if (NILP (b
->base_buffer
->begv_marker
))
596 b
->base_buffer
->begv_marker
= Fmake_marker ();
597 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
598 BUF_BEGV (b
->base_buffer
),
599 BUF_BEGV_BYTE (b
->base_buffer
));
601 if (NILP (b
->base_buffer
->zv_marker
))
603 b
->base_buffer
->zv_marker
= Fmake_marker ();
604 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
605 BUF_ZV (b
->base_buffer
),
606 BUF_ZV_BYTE (b
->base_buffer
));
607 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
612 /* Give the indirect buffer markers for its narrowing. */
613 b
->pt_marker
= Fmake_marker ();
614 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
615 b
->begv_marker
= Fmake_marker ();
616 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
617 b
->zv_marker
= Fmake_marker ();
618 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
619 XMARKER (b
->zv_marker
)->insertion_type
= 1;
622 clone_per_buffer_values (b
->base_buffer
, b
);
627 /* Reinitialize everything about a buffer except its name and contents
628 and local variables. */
632 register struct buffer
*b
;
635 b
->file_truename
= Qnil
;
636 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
638 XSETFASTINT (b
->save_length
, 0);
639 b
->last_window_start
= 1;
640 /* It is more conservative to start out "changed" than "unchanged". */
642 b
->prevent_redisplay_optimizations_p
= 1;
644 b
->auto_save_modified
= 0;
645 b
->auto_save_failure_time
= -1;
646 b
->auto_save_file_name
= Qnil
;
648 b
->overlays_before
= Qnil
;
649 b
->overlays_after
= Qnil
;
650 XSETFASTINT (b
->overlay_center
, 1);
651 b
->mark_active
= Qnil
;
652 b
->point_before_scroll
= Qnil
;
653 b
->file_format
= Qnil
;
654 b
->last_selected_window
= Qnil
;
655 XSETINT (b
->display_count
, 0);
656 b
->display_time
= Qnil
;
657 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
658 b
->cursor_type
= buffer_defaults
.cursor_type
;
659 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
661 b
->display_error_modiff
= 0;
664 /* Reset buffer B's local variables info.
665 Don't use this on a buffer that has already been in use;
666 it does not treat permanent locals consistently.
667 Instead, use Fkill_all_local_variables.
669 If PERMANENT_TOO is 1, then we reset permanent built-in
670 buffer-local variables. If PERMANENT_TOO is 0,
671 we preserve those. */
674 reset_buffer_local_variables (b
, permanent_too
)
675 register struct buffer
*b
;
681 /* Reset the major mode to Fundamental, together with all the
682 things that depend on the major mode.
683 default-major-mode is handled at a higher level.
684 We ignore it here. */
685 b
->major_mode
= Qfundamental_mode
;
687 b
->mode_name
= QSFundamental
;
688 b
->minor_modes
= Qnil
;
690 /* If the standard case table has been altered and invalidated,
691 fix up its insides first. */
692 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
693 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
694 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
695 Fset_standard_case_table (Vascii_downcase_table
);
697 b
->downcase_table
= Vascii_downcase_table
;
698 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
699 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
700 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
701 b
->invisibility_spec
= Qt
;
703 b
->buffer_file_type
= Qnil
;
706 /* Reset all (or most) per-buffer variables to their defaults. */
707 b
->local_var_alist
= Qnil
;
708 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
709 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
710 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
712 /* For each slot that has a default value,
713 copy that into the slot. */
715 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
717 offset
+= sizeof (Lisp_Object
))
719 int idx
= PER_BUFFER_IDX (offset
);
722 || buffer_permanent_local_flags
[idx
] == 0))
723 /* Is -2 used anywhere? */
725 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
729 /* We split this away from generate-new-buffer, because rename-buffer
730 and set-visited-file-name ought to be able to use this to really
731 rename the buffer properly. */
733 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
735 doc
: /* Return a string that is the name of no existing buffer based on NAME.
736 If there is no live buffer named NAME, then return NAME.
737 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
738 until an unused name is found, and then return that name.
739 Optional second argument IGNORE specifies a name that is okay to use
740 \(if it is in the sequence to be tried)
741 even if a buffer with that name exists. */)
743 register Lisp_Object name
, ignore
;
745 register Lisp_Object gentemp
, tem
;
751 tem
= Fget_buffer (name
);
758 sprintf (number
, "<%d>", ++count
);
759 gentemp
= concat2 (name
, build_string (number
));
760 tem
= Fstring_equal (gentemp
, ignore
);
763 tem
= Fget_buffer (gentemp
);
770 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
771 doc
: /* Return the name of BUFFER, as a string.
772 With no argument or nil as argument, return the name of the current buffer. */)
774 register Lisp_Object buffer
;
777 return current_buffer
->name
;
778 CHECK_BUFFER (buffer
);
779 return XBUFFER (buffer
)->name
;
782 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
783 doc
: /* Return name of file BUFFER is visiting, or nil if none.
784 No argument or nil as argument means use the current buffer. */)
786 register Lisp_Object buffer
;
789 return current_buffer
->filename
;
790 CHECK_BUFFER (buffer
);
791 return XBUFFER (buffer
)->filename
;
794 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
796 doc
: /* Return the base buffer of indirect buffer BUFFER.
797 If BUFFER is not indirect, return nil. */)
799 register Lisp_Object buffer
;
802 Lisp_Object base_buffer
;
805 base
= current_buffer
->base_buffer
;
808 CHECK_BUFFER (buffer
);
809 base
= XBUFFER (buffer
)->base_buffer
;
814 XSETBUFFER (base_buffer
, base
);
818 DEFUN ("buffer-local-value", Fbuffer_local_value
,
819 Sbuffer_local_value
, 2, 2, 0,
820 doc
: /* Return the value of VARIABLE in BUFFER.
821 If VARIABLE does not have a buffer-local binding in BUFFER, the value
822 is the default binding of variable. */)
824 register Lisp_Object symbol
;
825 register Lisp_Object buffer
;
827 register struct buffer
*buf
;
828 register Lisp_Object result
;
830 CHECK_SYMBOL (symbol
);
831 CHECK_BUFFER (buffer
);
832 buf
= XBUFFER (buffer
);
834 /* Look in local_var_list */
835 result
= Fassoc (symbol
, buf
->local_var_alist
);
841 /* Look in special slots */
842 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
843 offset
< sizeof (struct buffer
);
844 /* sizeof EMACS_INT == sizeof Lisp_Object */
845 offset
+= (sizeof (EMACS_INT
)))
847 idx
= PER_BUFFER_IDX (offset
);
848 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
849 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
850 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
852 result
= PER_BUFFER_VALUE (buf
, offset
);
859 result
= Fdefault_value (symbol
);
863 Lisp_Object valcontents
;
864 Lisp_Object current_alist_element
;
866 /* What binding is loaded right now? */
867 valcontents
= SYMBOL_VALUE (symbol
);
868 current_alist_element
869 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
871 /* The value of the currently loaded binding is not
872 stored in it, but rather in the realvalue slot.
873 Store that value into the binding it belongs to
874 in case that is the one we are about to use. */
876 Fsetcdr (current_alist_element
,
877 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
879 /* Now get the (perhaps updated) value out of the binding. */
880 result
= XCDR (result
);
883 if (EQ (result
, Qunbound
))
884 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
889 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
890 Sbuffer_local_variables
, 0, 1, 0,
891 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
892 Most elements look like (SYMBOL . VALUE), describing one variable.
893 For a symbol that is locally unbound, just the symbol appears in the value.
894 Note that storing new VALUEs in these elements doesn't change the variables.
895 No argument or nil as argument means use current buffer as BUFFER. */)
897 register Lisp_Object buffer
;
899 register struct buffer
*buf
;
900 register Lisp_Object result
;
903 buf
= current_buffer
;
906 CHECK_BUFFER (buffer
);
907 buf
= XBUFFER (buffer
);
913 register Lisp_Object tail
;
914 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
916 Lisp_Object val
, elt
;
920 /* Reference each variable in the alist in buf.
921 If inquiring about the current buffer, this gets the current values,
922 so store them into the alist so the alist is up to date.
923 If inquiring about some other buffer, this swaps out any values
924 for that buffer, making the alist up to date automatically. */
925 val
= find_symbol_value (XCAR (elt
));
926 /* Use the current buffer value only if buf is the current buffer. */
927 if (buf
!= current_buffer
)
930 /* If symbol is unbound, put just the symbol in the list. */
931 if (EQ (val
, Qunbound
))
932 result
= Fcons (XCAR (elt
), result
);
933 /* Otherwise, put (symbol . value) in the list. */
935 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
939 /* Add on all the variables stored in special slots. */
943 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
944 offset
< sizeof (struct buffer
);
945 /* sizeof EMACS_INT == sizeof Lisp_Object */
946 offset
+= (sizeof (EMACS_INT
)))
948 idx
= PER_BUFFER_IDX (offset
);
949 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
950 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
951 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
952 PER_BUFFER_VALUE (buf
, offset
)),
961 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
963 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
964 No argument or nil as argument means use current buffer as BUFFER. */)
966 register Lisp_Object buffer
;
968 register struct buffer
*buf
;
970 buf
= current_buffer
;
973 CHECK_BUFFER (buffer
);
974 buf
= XBUFFER (buffer
);
977 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
980 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
982 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
983 A non-nil FLAG means mark the buffer modified. */)
985 register Lisp_Object flag
;
987 register int already
;
988 register Lisp_Object fn
;
989 Lisp_Object buffer
, window
;
991 #ifdef CLASH_DETECTION
992 /* If buffer becoming modified, lock the file.
993 If buffer becoming unmodified, unlock the file. */
995 fn
= current_buffer
->file_truename
;
996 /* Test buffer-file-name so that binding it to nil is effective. */
997 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
999 already
= SAVE_MODIFF
< MODIFF
;
1000 if (!already
&& !NILP (flag
))
1002 else if (already
&& NILP (flag
))
1005 #endif /* CLASH_DETECTION */
1007 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1009 /* Set update_mode_lines only if buffer is displayed in some window.
1010 Packages like jit-lock or lazy-lock preserve a buffer's modified
1011 state by recording/restoring the state around blocks of code.
1012 Setting update_mode_lines makes redisplay consider all windows
1013 (on all frames). Stealth fontification of buffers not displayed
1014 would incur additional redisplay costs if we'd set
1015 update_modes_lines unconditionally.
1017 Ideally, I think there should be another mechanism for fontifying
1018 buffers without "modifying" buffers, or redisplay should be
1019 smarter about updating the `*' in mode lines. --gerd */
1020 XSETBUFFER (buffer
, current_buffer
);
1021 window
= Fget_buffer_window (buffer
, Qt
);
1022 if (WINDOWP (window
))
1024 ++update_mode_lines
;
1025 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1031 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1032 Srestore_buffer_modified_p
, 1, 1, 0,
1033 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
1034 It is not ensured that mode lines will be updated to show the modified
1035 state of the current buffer. Use with care. */)
1039 #ifdef CLASH_DETECTION
1042 /* If buffer becoming modified, lock the file.
1043 If buffer becoming unmodified, unlock the file. */
1045 fn
= current_buffer
->file_truename
;
1046 /* Test buffer-file-name so that binding it to nil is effective. */
1047 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1049 int already
= SAVE_MODIFF
< MODIFF
;
1050 if (!already
&& !NILP (flag
))
1052 else if (already
&& NILP (flag
))
1055 #endif /* CLASH_DETECTION */
1057 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1061 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1063 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1064 Each buffer has a tick counter which is incremented each time the text in
1065 that buffer is changed. It wraps around occasionally.
1066 No argument or nil as argument means use current buffer as BUFFER. */)
1068 register Lisp_Object buffer
;
1070 register struct buffer
*buf
;
1072 buf
= current_buffer
;
1075 CHECK_BUFFER (buffer
);
1076 buf
= XBUFFER (buffer
);
1079 return make_number (BUF_MODIFF (buf
));
1082 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1083 "sRename buffer (to new name): \nP",
1084 doc
: /* Change current buffer's name to NEWNAME (a string).
1085 If second arg UNIQUE is nil or omitted, it is an error if a
1086 buffer named NEWNAME already exists.
1087 If UNIQUE is non-nil, come up with a new name using
1088 `generate-new-buffer-name'.
1089 Interactively, you can set UNIQUE with a prefix argument.
1090 We return the name we actually gave the buffer.
1091 This does not change the name of the visited file (if any). */)
1093 register Lisp_Object newname
, unique
;
1095 register Lisp_Object tem
, buf
;
1097 CHECK_STRING (newname
);
1099 if (SCHARS (newname
) == 0)
1100 error ("Empty string is invalid as a buffer name");
1102 tem
= Fget_buffer (newname
);
1105 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1106 rename the buffer automatically so you can create another
1107 with the original name. It makes UNIQUE equivalent to
1108 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1109 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1110 return current_buffer
->name
;
1112 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1114 error ("Buffer name `%s' is in use", SDATA (newname
));
1117 current_buffer
->name
= newname
;
1119 /* Catch redisplay's attention. Unless we do this, the mode lines for
1120 any windows displaying current_buffer will stay unchanged. */
1121 update_mode_lines
++;
1123 XSETBUFFER (buf
, current_buffer
);
1124 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1125 if (NILP (current_buffer
->filename
)
1126 && !NILP (current_buffer
->auto_save_file_name
))
1127 call0 (intern ("rename-auto-save-file"));
1128 /* Refetch since that last call may have done GC. */
1129 return current_buffer
->name
;
1132 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1133 doc
: /* Return most recently selected buffer other than BUFFER.
1134 Buffers not visible in windows are preferred to visible buffers,
1135 unless optional second argument VISIBLE-OK is non-nil.
1136 If the optional third argument FRAME is non-nil, use that frame's
1137 buffer list instead of the selected frame's buffer list.
1138 If no other buffer exists, the buffer `*scratch*' is returned.
1139 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1140 (buffer
, visible_ok
, frame
)
1141 register Lisp_Object buffer
, visible_ok
, frame
;
1143 Lisp_Object
Fset_buffer_major_mode ();
1144 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1148 frame
= selected_frame
;
1150 tail
= Vbuffer_alist
;
1151 pred
= frame_buffer_predicate (frame
);
1153 /* Consider buffers that have been seen in the selected frame
1154 before other buffers. */
1156 tem
= frame_buffer_list (frame
);
1160 if (BUFFERP (XCAR (tem
)))
1161 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1164 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1166 for (; CONSP (tail
); tail
= XCDR (tail
))
1168 buf
= Fcdr (XCAR (tail
));
1169 if (EQ (buf
, buffer
))
1171 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1173 /* If the selected frame has a buffer_predicate,
1174 disregard buffers that don't fit the predicate. */
1177 tem
= call1 (pred
, buf
);
1182 if (NILP (visible_ok
))
1183 tem
= Fget_buffer_window (buf
, Qvisible
);
1188 if (NILP (notsogood
))
1191 if (!NILP (notsogood
))
1193 buf
= Fget_buffer (build_string ("*scratch*"));
1196 buf
= Fget_buffer_create (build_string ("*scratch*"));
1197 Fset_buffer_major_mode (buf
);
1202 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1204 doc
: /* Make BUFFER stop keeping undo information.
1205 No argument or nil as argument means do this for the current buffer. */)
1207 register Lisp_Object buffer
;
1209 Lisp_Object real_buffer
;
1212 XSETBUFFER (real_buffer
, current_buffer
);
1215 real_buffer
= Fget_buffer (buffer
);
1216 if (NILP (real_buffer
))
1220 XBUFFER (real_buffer
)->undo_list
= Qt
;
1225 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1227 doc
: /* Start keeping undo information for buffer BUFFER.
1228 No argument or nil as argument means do this for the current buffer. */)
1230 register Lisp_Object buffer
;
1232 Lisp_Object real_buffer
;
1235 XSETBUFFER (real_buffer
, current_buffer
);
1238 real_buffer
= Fget_buffer (buffer
);
1239 if (NILP (real_buffer
))
1243 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1244 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1250 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1251 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1252 The buffer being killed will be current while the hook is running.\n\
1255 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1256 doc
: /* Kill the buffer BUFFER.
1257 The argument may be a buffer or may be the name of a buffer.
1258 An argument of nil means kill the current buffer.
1260 Value is t if the buffer is actually killed, nil if user says no.
1262 The value of `kill-buffer-hook' (which may be local to that buffer),
1263 if not void, is a list of functions to be called, with no arguments,
1264 before the buffer is actually killed. The buffer to be killed is current
1265 when the hook functions are called.
1267 Any processes that have this buffer as the `process-buffer' are killed
1273 register struct buffer
*b
;
1274 register Lisp_Object tem
;
1275 register struct Lisp_Marker
*m
;
1276 struct gcpro gcpro1
;
1279 buf
= Fcurrent_buffer ();
1281 buf
= Fget_buffer (buffer
);
1287 /* Avoid trouble for buffer already dead. */
1291 /* Query if the buffer is still modified. */
1292 if (INTERACTIVE
&& !NILP (b
->filename
)
1293 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1296 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1297 b
->name
, make_number (0)));
1303 /* Run hooks with the buffer to be killed the current buffer. */
1305 int count
= SPECPDL_INDEX ();
1306 Lisp_Object arglist
[1];
1308 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1309 set_buffer_internal (b
);
1311 /* First run the query functions; if any query is answered no,
1312 don't kill the buffer. */
1313 arglist
[0] = Qkill_buffer_query_functions
;
1314 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1315 return unbind_to (count
, Qnil
);
1317 /* Then run the hooks. */
1318 Frun_hooks (1, &Qkill_buffer_hook
);
1319 unbind_to (count
, Qnil
);
1322 /* We have no more questions to ask. Verify that it is valid
1323 to kill the buffer. This must be done after the questions
1324 since anything can happen within do_yes_or_no_p. */
1326 /* Don't kill the minibuffer now current. */
1327 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1333 /* When we kill a base buffer, kill all its indirect buffers.
1334 We do it at this stage so nothing terrible happens if they
1335 ask questions or their hooks get errors. */
1336 if (! b
->base_buffer
)
1338 struct buffer
*other
;
1342 for (other
= all_buffers
; other
; other
= other
->next
)
1343 /* all_buffers contains dead buffers too;
1344 don't re-kill them. */
1345 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1348 XSETBUFFER (buf
, other
);
1355 /* Make this buffer not be current.
1356 In the process, notice if this is the sole visible buffer
1357 and give up if so. */
1358 if (b
== current_buffer
)
1360 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1362 if (b
== current_buffer
)
1366 /* Notice if the buffer to kill is the sole visible buffer
1367 when we're currently in the mini-buffer, and give up if so. */
1368 XSETBUFFER (tem
, current_buffer
);
1369 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1371 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1376 /* Now there is no question: we can kill the buffer. */
1378 #ifdef CLASH_DETECTION
1379 /* Unlock this buffer's file, if it is locked. */
1381 #endif /* CLASH_DETECTION */
1383 kill_buffer_processes (buf
);
1385 tem
= Vinhibit_quit
;
1387 replace_buffer_in_all_windows (buf
);
1388 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1389 frames_discard_buffer (buf
);
1390 Vinhibit_quit
= tem
;
1392 /* Delete any auto-save file, if we saved it in this session.
1393 But not if the buffer is modified. */
1394 if (STRINGP (b
->auto_save_file_name
)
1395 && b
->auto_save_modified
!= 0
1396 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1397 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
))
1400 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1402 internal_delete_file (b
->auto_save_file_name
);
1407 /* Unchain all markers that belong to this indirect buffer.
1408 Don't unchain the markers that belong to the base buffer
1409 or its other indirect buffers. */
1410 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1416 unchain_marker (tem
);
1422 /* Unchain all markers of this buffer and its indirect buffers.
1423 and leave them pointing nowhere. */
1424 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1431 BUF_MARKERS (b
) = Qnil
;
1432 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1434 /* Perhaps we should explicitly free the interval tree here... */
1437 /* Reset the local variables, so that this buffer's local values
1438 won't be protected from GC. They would be protected
1439 if they happened to remain encached in their symbols.
1440 This gets rid of them for certain. */
1441 swap_out_buffer_local_variables (b
);
1442 reset_buffer_local_variables (b
, 1);
1447 if (! b
->base_buffer
)
1448 free_buffer_text (b
);
1450 if (b
->newline_cache
)
1452 free_region_cache (b
->newline_cache
);
1453 b
->newline_cache
= 0;
1455 if (b
->width_run_cache
)
1457 free_region_cache (b
->width_run_cache
);
1458 b
->width_run_cache
= 0;
1460 b
->width_table
= Qnil
;
1462 b
->undo_list
= Qnil
;
1467 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1468 we do this each time BUF is selected visibly, the more recently
1469 selected buffers are always closer to the front of the list. This
1470 means that other_buffer is more likely to choose a relevant buffer. */
1476 register Lisp_Object link
, prev
;
1478 frame
= selected_frame
;
1481 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1483 if (EQ (XCDR (XCAR (link
)), buf
))
1488 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1489 we cannot use Fdelq itself here because it allows quitting. */
1492 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1494 XSETCDR (prev
, XCDR (XCDR (prev
)));
1496 XSETCDR (link
, Vbuffer_alist
);
1497 Vbuffer_alist
= link
;
1499 /* Now move this buffer to the front of frame_buffer_list also. */
1502 for (link
= frame_buffer_list (frame
); CONSP (link
);
1505 if (EQ (XCAR (link
), buf
))
1510 /* Effectively do delq. */
1515 set_frame_buffer_list (frame
,
1516 XCDR (frame_buffer_list (frame
)));
1518 XSETCDR (prev
, XCDR (XCDR (prev
)));
1520 XSETCDR (link
, frame_buffer_list (frame
));
1521 set_frame_buffer_list (frame
, link
);
1524 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1527 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1528 doc
: /* Set an appropriate major mode for BUFFER.
1529 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1530 according to `default-major-mode'.
1531 Use this function before selecting the buffer, since it may need to inspect
1532 the current buffer's major mode. */)
1537 Lisp_Object function
;
1539 if (STRINGP (XBUFFER (buffer
)->name
)
1540 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1541 function
= find_symbol_value (intern ("initial-major-mode"));
1544 function
= buffer_defaults
.major_mode
;
1546 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1547 function
= current_buffer
->major_mode
;
1550 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1553 count
= SPECPDL_INDEX ();
1555 /* To select a nonfundamental mode,
1556 select the buffer temporarily and then call the mode function. */
1558 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1560 Fset_buffer (buffer
);
1563 return unbind_to (count
, Qnil
);
1566 /* If switching buffers in WINDOW would be an error, return
1567 a C string saying what the error would be. */
1570 no_switch_window (window
)
1574 if (EQ (minibuf_window
, window
))
1575 return "Cannot switch buffers in minibuffer window";
1576 tem
= Fwindow_dedicated_p (window
);
1578 return "Cannot switch buffers in a dedicated window";
1582 /* Switch to buffer BUFFER in the selected window.
1583 If NORECORD is non-nil, don't call record_buffer. */
1586 switch_to_buffer_1 (buffer
, norecord
)
1587 Lisp_Object buffer
, norecord
;
1589 register Lisp_Object buf
;
1592 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1595 buf
= Fget_buffer (buffer
);
1598 buf
= Fget_buffer_create (buffer
);
1599 Fset_buffer_major_mode (buf
);
1603 if (NILP (norecord
))
1604 record_buffer (buf
);
1606 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1607 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1614 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1615 doc
: /* Select buffer BUFFER in the current window.
1616 BUFFER may be a buffer or a buffer name.
1617 Optional second arg NORECORD non-nil means
1618 do not put this buffer at the front of the list of recently selected ones.
1620 WARNING: This is NOT the way to work on another buffer temporarily
1621 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1622 the window-buffer correspondences. */)
1624 Lisp_Object buffer
, norecord
;
1628 err
= no_switch_window (selected_window
);
1629 if (err
) error (err
);
1631 return switch_to_buffer_1 (buffer
, norecord
);
1634 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1635 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1636 If BUFFER is nil, then some other buffer is chosen.
1637 If `pop-up-windows' is non-nil, windows can be split to do this.
1638 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1639 window even if BUFFER is already visible in the selected window.
1640 This uses the function `display-buffer' as a subroutine; see the documentation
1641 of `display-buffer' for additional customization information.
1643 Optional third arg NORECORD non-nil means
1644 do not put this buffer at the front of the list of recently selected ones. */)
1645 (buffer
, other_window
, norecord
)
1646 Lisp_Object buffer
, other_window
, norecord
;
1648 register Lisp_Object buf
;
1650 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1653 buf
= Fget_buffer (buffer
);
1656 buf
= Fget_buffer_create (buffer
);
1657 Fset_buffer_major_mode (buf
);
1661 if (NILP (norecord
))
1662 /* Why bother ? Fselect_window will do it for us anyway. -stef */
1663 record_buffer (buf
);
1664 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1668 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1669 doc
: /* Return the current buffer as a Lisp object. */)
1672 register Lisp_Object buf
;
1673 XSETBUFFER (buf
, current_buffer
);
1677 /* Set the current buffer to B.
1679 We previously set windows_or_buffers_changed here to invalidate
1680 global unchanged information in beg_unchanged and end_unchanged.
1681 This is no longer necessary because we now compute unchanged
1682 information on a buffer-basis. Every action affecting other
1683 windows than the selected one requires a select_window at some
1684 time, and that increments windows_or_buffers_changed. */
1687 set_buffer_internal (b
)
1688 register struct buffer
*b
;
1690 if (current_buffer
!= b
)
1691 set_buffer_internal_1 (b
);
1694 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1695 This is used by redisplay. */
1698 set_buffer_internal_1 (b
)
1699 register struct buffer
*b
;
1701 register struct buffer
*old_buf
;
1702 register Lisp_Object tail
, valcontents
;
1705 #ifdef USE_MMAP_FOR_BUFFERS
1706 if (b
->text
->beg
== NULL
)
1707 enlarge_buffer_text (b
, 0);
1708 #endif /* USE_MMAP_FOR_BUFFERS */
1710 if (current_buffer
== b
)
1713 old_buf
= current_buffer
;
1715 last_known_column_point
= -1; /* invalidate indentation cache */
1719 /* Put the undo list back in the base buffer, so that it appears
1720 that an indirect buffer shares the undo list of its base. */
1721 if (old_buf
->base_buffer
)
1722 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1724 /* If the old current buffer has markers to record PT, BEGV and ZV
1725 when it is not current, update them now. */
1726 if (! NILP (old_buf
->pt_marker
))
1729 XSETBUFFER (obuf
, old_buf
);
1730 set_marker_both (old_buf
->pt_marker
, obuf
,
1731 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1733 if (! NILP (old_buf
->begv_marker
))
1736 XSETBUFFER (obuf
, old_buf
);
1737 set_marker_both (old_buf
->begv_marker
, obuf
,
1738 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1740 if (! NILP (old_buf
->zv_marker
))
1743 XSETBUFFER (obuf
, old_buf
);
1744 set_marker_both (old_buf
->zv_marker
, obuf
,
1745 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1749 /* Get the undo list from the base buffer, so that it appears
1750 that an indirect buffer shares the undo list of its base. */
1752 b
->undo_list
= b
->base_buffer
->undo_list
;
1754 /* If the new current buffer has markers to record PT, BEGV and ZV
1755 when it is not current, fetch them now. */
1756 if (! NILP (b
->pt_marker
))
1758 BUF_PT (b
) = marker_position (b
->pt_marker
);
1759 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1761 if (! NILP (b
->begv_marker
))
1763 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1764 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1766 if (! NILP (b
->zv_marker
))
1768 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1769 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1772 /* Look down buffer's list of local Lisp variables
1773 to find and update any that forward into C variables. */
1775 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1777 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1778 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1779 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1780 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1781 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1782 /* Just reference the variable
1783 to cause it to become set for this buffer. */
1784 Fsymbol_value (XCAR (XCAR (tail
)));
1787 /* Do the same with any others that were local to the previous buffer */
1790 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1792 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1793 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1794 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1795 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1796 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1797 /* Just reference the variable
1798 to cause it to become set for this buffer. */
1799 Fsymbol_value (XCAR (XCAR (tail
)));
1803 /* Switch to buffer B temporarily for redisplay purposes.
1804 This avoids certain things that don't need to be done within redisplay. */
1810 register struct buffer
*old_buf
;
1812 if (current_buffer
== b
)
1815 old_buf
= current_buffer
;
1820 /* If the old current buffer has markers to record PT, BEGV and ZV
1821 when it is not current, update them now. */
1822 if (! NILP (old_buf
->pt_marker
))
1825 XSETBUFFER (obuf
, old_buf
);
1826 set_marker_both (old_buf
->pt_marker
, obuf
,
1827 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1829 if (! NILP (old_buf
->begv_marker
))
1832 XSETBUFFER (obuf
, old_buf
);
1833 set_marker_both (old_buf
->begv_marker
, obuf
,
1834 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1836 if (! NILP (old_buf
->zv_marker
))
1839 XSETBUFFER (obuf
, old_buf
);
1840 set_marker_both (old_buf
->zv_marker
, obuf
,
1841 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1845 /* If the new current buffer has markers to record PT, BEGV and ZV
1846 when it is not current, fetch them now. */
1847 if (! NILP (b
->pt_marker
))
1849 BUF_PT (b
) = marker_position (b
->pt_marker
);
1850 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1852 if (! NILP (b
->begv_marker
))
1854 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1855 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1857 if (! NILP (b
->zv_marker
))
1859 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1860 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1864 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1865 doc
: /* Make the buffer BUFFER current for editing operations.
1866 BUFFER may be a buffer or the name of an existing buffer.
1867 See also `save-excursion' when you want to make a buffer current temporarily.
1868 This function does not display the buffer, so its effect ends
1869 when the current command terminates.
1870 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1872 register Lisp_Object buffer
;
1874 register Lisp_Object buf
;
1875 buf
= Fget_buffer (buffer
);
1878 if (NILP (XBUFFER (buf
)->name
))
1879 error ("Selecting deleted buffer");
1880 set_buffer_internal (XBUFFER (buf
));
1884 /* Set the current buffer to BUFFER provided it is alive. */
1887 set_buffer_if_live (buffer
)
1890 if (! NILP (XBUFFER (buffer
)->name
))
1891 Fset_buffer (buffer
);
1895 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1896 Sbarf_if_buffer_read_only
, 0, 0, 0,
1897 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1900 if (!NILP (current_buffer
->read_only
)
1901 && NILP (Vinhibit_read_only
))
1902 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1906 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1907 doc
: /* Put BUFFER at the end of the list of all buffers.
1908 There it is the least likely candidate for `other-buffer' to return;
1909 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1910 If BUFFER is nil or omitted, bury the current buffer.
1911 Also, if BUFFER is nil or omitted, remove the current buffer from the
1912 selected window if it is displayed there. */)
1914 register Lisp_Object buffer
;
1916 /* Figure out what buffer we're going to bury. */
1920 XSETBUFFER (buffer
, current_buffer
);
1922 tem
= Fwindow_buffer (selected_window
);
1923 /* If we're burying the current buffer, unshow it. */
1924 if (EQ (buffer
, tem
))
1926 if (NILP (Fwindow_dedicated_p (selected_window
)))
1927 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1928 else if (NILP (XWINDOW (selected_window
)->parent
))
1929 Ficonify_frame (Fwindow_frame (selected_window
));
1931 Fdelete_window (selected_window
);
1938 buf1
= Fget_buffer (buffer
);
1944 /* Move buffer to the end of the buffer list. Do nothing if the
1945 buffer is killed. */
1946 if (!NILP (XBUFFER (buffer
)->name
))
1948 Lisp_Object aelt
, link
;
1950 aelt
= Frassq (buffer
, Vbuffer_alist
);
1951 link
= Fmemq (aelt
, Vbuffer_alist
);
1952 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1953 XSETCDR (link
, Qnil
);
1954 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1956 /* Removing BUFFER from frame-specific lists
1957 has the effect of putting BUFFER at the end
1958 of the combined list in each frame. */
1959 frames_discard_buffer (buffer
);
1965 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1966 doc
: /* Delete the entire contents of the current buffer.
1967 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1968 so the buffer is truly empty after this. */)
1975 current_buffer
->last_window_start
= 1;
1976 /* Prevent warnings, or suspension of auto saving, that would happen
1977 if future size is less than past size. Use of erase-buffer
1978 implies that the future text is not really related to the past text. */
1979 XSETFASTINT (current_buffer
->save_length
, 0);
1984 validate_region (b
, e
)
1985 register Lisp_Object
*b
, *e
;
1987 CHECK_NUMBER_COERCE_MARKER (*b
);
1988 CHECK_NUMBER_COERCE_MARKER (*e
);
1990 if (XINT (*b
) > XINT (*e
))
1993 tem
= *b
; *b
= *e
; *e
= tem
;
1996 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1997 && XINT (*e
) <= ZV
))
1998 args_out_of_range (*b
, *e
);
2001 /* Advance BYTE_POS up to a character boundary
2002 and return the adjusted position. */
2005 advance_to_char_boundary (byte_pos
)
2010 if (byte_pos
== BEG
)
2011 /* Beginning of buffer is always a character boundary. */
2014 c
= FETCH_BYTE (byte_pos
);
2015 if (! CHAR_HEAD_P (c
))
2017 /* We should advance BYTE_POS only when C is a constituent of a
2018 multibyte sequence. */
2019 int orig_byte_pos
= byte_pos
;
2024 c
= FETCH_BYTE (byte_pos
);
2026 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2028 if (byte_pos
< orig_byte_pos
)
2029 byte_pos
= orig_byte_pos
;
2030 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2031 surely advance to the correct character boundary. If C is
2032 not, BYTE_POS was unchanged. */
2038 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2040 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2041 If FLAG is t, this makes the buffer a multibyte buffer.
2042 If FLAG is nil, this makes the buffer a single-byte buffer.
2043 The buffer contents remain unchanged as a sequence of bytes
2044 but the contents viewed as characters do change. */)
2048 Lisp_Object tail
, markers
;
2049 struct buffer
*other
;
2050 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2051 int begv
= BEGV
, zv
= ZV
;
2052 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
2053 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2055 if (current_buffer
->base_buffer
)
2056 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2058 /* Do nothing if nothing actually changes. */
2059 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2062 /* It would be better to update the list,
2063 but this is good enough for now. */
2065 current_buffer
->undo_list
= Qt
;
2067 /* If the cached position is for this buffer, clear it out. */
2068 clear_charpos_cache (current_buffer
);
2078 /* Do this first, so it can use CHAR_TO_BYTE
2079 to calculate the old correspondences. */
2080 set_intervals_multibyte (0);
2082 current_buffer
->enable_multibyte_characters
= Qnil
;
2088 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2090 tail
= BUF_MARKERS (current_buffer
);
2091 while (! NILP (tail
))
2093 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
2094 tail
= XMARKER (tail
)->chain
;
2097 /* Convert multibyte form of 8-bit characters to unibyte. */
2112 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2113 p
+= bytes
, pos
+= bytes
;
2116 c
= STRING_CHAR (p
, stop
- pos
);
2117 /* Delete all bytes for this 8-bit character but the
2118 last one, and change the last one to the charcter
2121 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2133 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2141 /* Be sure not to have a multibyte sequence striding over the GAP.
2142 Ex: We change this: "...abc\201 _GAP_ \241def..."
2143 to: "...abc _GAP_ \201\241def..." */
2145 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2146 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2148 unsigned char *p
= GPT_ADDR
- 1;
2150 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2151 if (BASE_LEADING_CODE_P (*p
))
2153 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2155 move_gap_both (new_gpt
, new_gpt
);
2159 /* Make the buffer contents valid as multibyte by converting
2160 8-bit characters to multibyte form. */
2176 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2177 p
+= bytes
, pos
+= bytes
;
2180 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2182 bytes
= CHAR_STRING (*p
, tmp
);
2184 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2186 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2187 /* Now the gap is after the just inserted data. */
2204 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2206 /* Do this first, so that chars_in_text asks the right question.
2207 set_intervals_multibyte needs it too. */
2208 current_buffer
->enable_multibyte_characters
= Qt
;
2210 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2211 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2213 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2215 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2216 if (BEGV_BYTE
> GPT_BYTE
)
2217 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2219 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2221 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2222 if (ZV_BYTE
> GPT_BYTE
)
2223 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2225 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2228 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2231 if (pt_byte
> GPT_BYTE
)
2232 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2234 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2235 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2238 tail
= markers
= BUF_MARKERS (current_buffer
);
2240 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2241 getting confused by the markers that have not yet been updated.
2242 It is also a signal that it should never create a marker. */
2243 BUF_MARKERS (current_buffer
) = Qnil
;
2245 while (! NILP (tail
))
2247 XMARKER (tail
)->bytepos
2248 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2249 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2251 tail
= XMARKER (tail
)->chain
;
2254 /* Make sure no markers were put on the chain
2255 while the chain value was incorrect. */
2256 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2259 BUF_MARKERS (current_buffer
) = markers
;
2261 /* Do this last, so it can calculate the new correspondences
2262 between chars and bytes. */
2263 set_intervals_multibyte (1);
2267 current_buffer
->undo_list
= Qnil
;
2269 /* Changing the multibyteness of a buffer means that all windows
2270 showing that buffer must be updated thoroughly. */
2271 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2272 ++windows_or_buffers_changed
;
2274 /* Copy this buffer's new multibyte status
2275 into all of its indirect buffers. */
2276 for (other
= all_buffers
; other
; other
= other
->next
)
2277 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2279 other
->enable_multibyte_characters
2280 = current_buffer
->enable_multibyte_characters
;
2281 other
->prevent_redisplay_optimizations_p
= 1;
2284 /* Restore the modifiedness of the buffer. */
2285 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2286 Fset_buffer_modified_p (Qnil
);
2289 /* Update coding systems of this buffer's process (if any). */
2291 Lisp_Object process
;
2293 process
= Fget_buffer_process (Fcurrent_buffer ());
2294 if (PROCESSP (process
))
2295 setup_process_coding_systems (process
);
2297 #endif /* subprocesses */
2302 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2304 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2305 Most local variable bindings are eliminated so that the default values
2306 become effective once more. Also, the syntax table is set from
2307 `standard-syntax-table', the local keymap is set to nil,
2308 and the abbrev table from `fundamental-mode-abbrev-table'.
2309 This function also forces redisplay of the mode line.
2311 Every function to select a new major mode starts by
2312 calling this function.
2314 As a special exception, local variables whose names have
2315 a non-nil `permanent-local' property are not eliminated by this function.
2317 The first thing this function does is run
2318 the normal hook `change-major-mode-hook'. */)
2321 register Lisp_Object alist
, sym
, tem
;
2324 if (!NILP (Vrun_hooks
))
2325 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2326 oalist
= current_buffer
->local_var_alist
;
2328 /* Make sure none of the bindings in oalist
2329 remain swapped in, in their symbols. */
2331 swap_out_buffer_local_variables (current_buffer
);
2333 /* Actually eliminate all local bindings of this buffer. */
2335 reset_buffer_local_variables (current_buffer
, 0);
2337 /* Any which are supposed to be permanent,
2338 make local again, with the same values they had. */
2340 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2342 sym
= XCAR (XCAR (alist
));
2343 tem
= Fget (sym
, Qpermanent_local
);
2346 Fmake_local_variable (sym
);
2347 Fset (sym
, XCDR (XCAR (alist
)));
2351 /* Force mode-line redisplay. Useful here because all major mode
2352 commands call this function. */
2353 update_mode_lines
++;
2358 /* Make sure no local variables remain set up with buffer B
2359 for their current values. */
2362 swap_out_buffer_local_variables (b
)
2365 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2367 XSETBUFFER (buffer
, b
);
2368 oalist
= b
->local_var_alist
;
2370 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2372 sym
= XCAR (XCAR (alist
));
2374 /* Need not do anything if some other buffer's binding is now encached. */
2375 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2376 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2378 /* Symbol is set up for this buffer's old local value.
2379 Set it up for the current buffer with the default value. */
2381 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2382 /* Store the symbol's current value into the alist entry
2383 it is currently set up for. This is so that, if the
2384 local is marked permanent, and we make it local again
2385 later in Fkill_all_local_variables, we don't lose the value. */
2386 XSETCDR (XCAR (tem
),
2387 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2388 /* Switch to the symbol's default-value alist entry. */
2390 /* Mark it as current for buffer B. */
2391 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2392 /* Store the current value into any forwarding in the symbol. */
2393 store_symval_forwarding (sym
,
2394 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2400 /* Find all the overlays in the current buffer that contain position POS.
2401 Return the number found, and store them in a vector in *VEC_PTR.
2402 Store in *LEN_PTR the size allocated for the vector.
2403 Store in *NEXT_PTR the next position after POS where an overlay starts,
2404 or ZV if there are no more overlays.
2405 Store in *PREV_PTR the previous position before POS where an overlay ends,
2406 or where an overlay starts which ends at or after POS;
2407 or BEGV if there are no such overlays.
2408 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2410 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2411 when this function is called.
2413 If EXTEND is non-zero, we make the vector bigger if necessary.
2414 If EXTEND is zero, we never extend the vector,
2415 and we store only as many overlays as will fit.
2416 But we still return the total number of overlays.
2418 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2419 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2420 default (BEGV or ZV). */
2423 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2426 Lisp_Object
**vec_ptr
;
2432 Lisp_Object tail
, overlay
, start
, end
;
2435 Lisp_Object
*vec
= *vec_ptr
;
2438 int inhibit_storing
= 0;
2440 for (tail
= current_buffer
->overlays_before
;
2444 int startpos
, endpos
;
2446 overlay
= XCAR (tail
);
2448 start
= OVERLAY_START (overlay
);
2449 end
= OVERLAY_END (overlay
);
2450 endpos
= OVERLAY_POSITION (end
);
2457 startpos
= OVERLAY_POSITION (start
);
2458 /* This one ends at or after POS
2459 so its start counts for PREV_PTR if it's before POS. */
2460 if (prev
< startpos
&& startpos
< pos
)
2464 if (startpos
<= pos
)
2468 /* The supplied vector is full.
2469 Either make it bigger, or don't store any more in it. */
2472 /* Make it work with an initial len == 0. */
2477 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2481 inhibit_storing
= 1;
2484 if (!inhibit_storing
)
2486 /* Keep counting overlays even if we can't return them all. */
2489 else if (startpos
< next
)
2493 for (tail
= current_buffer
->overlays_after
;
2497 int startpos
, endpos
;
2499 overlay
= XCAR (tail
);
2501 start
= OVERLAY_START (overlay
);
2502 end
= OVERLAY_END (overlay
);
2503 startpos
= OVERLAY_POSITION (start
);
2506 if (startpos
< next
)
2510 endpos
= OVERLAY_POSITION (end
);
2517 /* Make it work with an initial len == 0. */
2522 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2526 inhibit_storing
= 1;
2529 if (!inhibit_storing
)
2533 if (startpos
< pos
&& startpos
> prev
)
2536 else if (endpos
< pos
&& endpos
> prev
)
2538 else if (endpos
== pos
&& startpos
> prev
2539 && (!change_req
|| startpos
< pos
))
2550 /* Find all the overlays in the current buffer that overlap the range BEG-END
2551 or are empty at BEG.
2553 Return the number found, and store them in a vector in *VEC_PTR.
2554 Store in *LEN_PTR the size allocated for the vector.
2555 Store in *NEXT_PTR the next position after POS where an overlay starts,
2556 or ZV if there are no more overlays.
2557 Store in *PREV_PTR the previous position before POS where an overlay ends,
2558 or BEGV if there are no previous overlays.
2559 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2561 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2562 when this function is called.
2564 If EXTEND is non-zero, we make the vector bigger if necessary.
2565 If EXTEND is zero, we never extend the vector,
2566 and we store only as many overlays as will fit.
2567 But we still return the total number of overlays. */
2570 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2573 Lisp_Object
**vec_ptr
;
2578 Lisp_Object tail
, overlay
, ostart
, oend
;
2581 Lisp_Object
*vec
= *vec_ptr
;
2584 int inhibit_storing
= 0;
2586 for (tail
= current_buffer
->overlays_before
;
2590 int startpos
, endpos
;
2592 overlay
= XCAR (tail
);
2594 ostart
= OVERLAY_START (overlay
);
2595 oend
= OVERLAY_END (overlay
);
2596 endpos
= OVERLAY_POSITION (oend
);
2603 startpos
= OVERLAY_POSITION (ostart
);
2604 /* Count an interval if it either overlaps the range
2605 or is empty at the start of the range. */
2606 if ((beg
< endpos
&& startpos
< end
)
2607 || (startpos
== endpos
&& beg
== endpos
))
2611 /* The supplied vector is full.
2612 Either make it bigger, or don't store any more in it. */
2615 /* Make it work with an initial len == 0. */
2620 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2624 inhibit_storing
= 1;
2627 if (!inhibit_storing
)
2629 /* Keep counting overlays even if we can't return them all. */
2632 else if (startpos
< next
)
2636 for (tail
= current_buffer
->overlays_after
;
2640 int startpos
, endpos
;
2642 overlay
= XCAR (tail
);
2644 ostart
= OVERLAY_START (overlay
);
2645 oend
= OVERLAY_END (overlay
);
2646 startpos
= OVERLAY_POSITION (ostart
);
2649 if (startpos
< next
)
2653 endpos
= OVERLAY_POSITION (oend
);
2654 /* Count an interval if it either overlaps the range
2655 or is empty at the start of the range. */
2656 if ((beg
< endpos
&& startpos
< end
)
2657 || (startpos
== endpos
&& beg
== endpos
))
2663 /* Make it work with an initial len == 0. */
2668 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2672 inhibit_storing
= 1;
2675 if (!inhibit_storing
)
2679 else if (endpos
< beg
&& endpos
> prev
)
2691 /* Return non-zero if there exists an overlay with a non-nil
2692 `mouse-face' property overlapping OVERLAY. */
2695 mouse_face_overlay_overlaps (overlay
)
2696 Lisp_Object overlay
;
2698 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2699 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2701 Lisp_Object
*v
, tem
;
2704 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2705 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2708 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2709 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2712 for (i
= 0; i
< n
; ++i
)
2713 if (!EQ (v
[i
], overlay
)
2714 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2723 /* Fast function to just test if we're at an overlay boundary. */
2725 overlay_touches_p (pos
)
2728 Lisp_Object tail
, overlay
;
2730 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2735 overlay
= XCAR (tail
);
2736 if (!GC_OVERLAYP (overlay
))
2739 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2742 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2746 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2751 overlay
= XCAR (tail
);
2752 if (!GC_OVERLAYP (overlay
))
2755 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2758 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2766 Lisp_Object overlay
;
2772 compare_overlays (v1
, v2
)
2773 const void *v1
, *v2
;
2775 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2776 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2777 if (s1
->priority
!= s2
->priority
)
2778 return s1
->priority
- s2
->priority
;
2779 if (s1
->beg
!= s2
->beg
)
2780 return s1
->beg
- s2
->beg
;
2781 if (s1
->end
!= s2
->end
)
2782 return s2
->end
- s1
->end
;
2786 /* Sort an array of overlays by priority. The array is modified in place.
2787 The return value is the new size; this may be smaller than the original
2788 size if some of the overlays were invalid or were window-specific. */
2790 sort_overlays (overlay_vec
, noverlays
, w
)
2791 Lisp_Object
*overlay_vec
;
2796 struct sortvec
*sortvec
;
2797 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2799 /* Put the valid and relevant overlays into sortvec. */
2801 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2804 Lisp_Object overlay
;
2806 overlay
= overlay_vec
[i
];
2807 if (OVERLAY_VALID (overlay
)
2808 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2809 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2811 /* If we're interested in a specific window, then ignore
2812 overlays that are limited to some other window. */
2817 window
= Foverlay_get (overlay
, Qwindow
);
2818 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2822 /* This overlay is good and counts: put it into sortvec. */
2823 sortvec
[j
].overlay
= overlay
;
2824 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2825 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2826 tem
= Foverlay_get (overlay
, Qpriority
);
2828 sortvec
[j
].priority
= XINT (tem
);
2830 sortvec
[j
].priority
= 0;
2836 /* Sort the overlays into the proper order: increasing priority. */
2839 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2841 for (i
= 0; i
< noverlays
; i
++)
2842 overlay_vec
[i
] = sortvec
[i
].overlay
;
2848 Lisp_Object string
, string2
;
2855 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2856 int size
; /* Allocated length of that array. */
2857 int used
; /* How much of the array is currently in use. */
2858 int bytes
; /* Total length of the strings in buf. */
2861 /* Buffers for storing information about the overlays touching a given
2862 position. These could be automatic variables in overlay_strings, but
2863 it's more efficient to hold onto the memory instead of repeatedly
2864 allocating and freeing it. */
2865 static struct sortstrlist overlay_heads
, overlay_tails
;
2866 static unsigned char *overlay_str_buf
;
2868 /* Allocated length of overlay_str_buf. */
2869 static int overlay_str_len
;
2871 /* A comparison function suitable for passing to qsort. */
2873 cmp_for_strings (as1
, as2
)
2876 struct sortstr
*s1
= (struct sortstr
*)as1
;
2877 struct sortstr
*s2
= (struct sortstr
*)as2
;
2878 if (s1
->size
!= s2
->size
)
2879 return s2
->size
- s1
->size
;
2880 if (s1
->priority
!= s2
->priority
)
2881 return s1
->priority
- s2
->priority
;
2886 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2887 struct sortstrlist
*ssl
;
2888 Lisp_Object str
, str2
, pri
;
2893 if (ssl
->used
== ssl
->size
)
2899 ssl
->buf
= ((struct sortstr
*)
2900 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2902 ssl
->buf
[ssl
->used
].string
= str
;
2903 ssl
->buf
[ssl
->used
].string2
= str2
;
2904 ssl
->buf
[ssl
->used
].size
= size
;
2905 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2908 if (NILP (current_buffer
->enable_multibyte_characters
))
2909 nbytes
= SCHARS (str
);
2910 else if (! STRING_MULTIBYTE (str
))
2911 nbytes
= count_size_as_multibyte (SDATA (str
),
2914 nbytes
= SBYTES (str
);
2916 ssl
->bytes
+= nbytes
;
2920 if (NILP (current_buffer
->enable_multibyte_characters
))
2921 nbytes
= SCHARS (str2
);
2922 else if (! STRING_MULTIBYTE (str2
))
2923 nbytes
= count_size_as_multibyte (SDATA (str2
),
2926 nbytes
= SBYTES (str2
);
2928 ssl
->bytes
+= nbytes
;
2932 /* Return the concatenation of the strings associated with overlays that
2933 begin or end at POS, ignoring overlays that are specific to a window
2934 other than W. The strings are concatenated in the appropriate order:
2935 shorter overlays nest inside longer ones, and higher priority inside
2936 lower. Normally all of the after-strings come first, but zero-sized
2937 overlays have their after-strings ride along with the before-strings
2938 because it would look strange to print them inside-out.
2940 Returns the string length, and stores the contents indirectly through
2941 PSTR, if that variable is non-null. The string may be overwritten by
2942 subsequent calls. */
2945 overlay_strings (pos
, w
, pstr
)
2948 unsigned char **pstr
;
2950 Lisp_Object ov
, overlay
, window
, str
;
2951 int startpos
, endpos
;
2952 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2954 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2955 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2956 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2958 overlay
= XCAR (ov
);
2959 if (!OVERLAYP (overlay
))
2962 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2963 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2966 if (endpos
!= pos
&& startpos
!= pos
)
2968 window
= Foverlay_get (overlay
, Qwindow
);
2969 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2972 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2973 record_overlay_string (&overlay_heads
, str
,
2975 ? Foverlay_get (overlay
, Qafter_string
)
2977 Foverlay_get (overlay
, Qpriority
),
2979 else if (endpos
== pos
2980 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2981 record_overlay_string (&overlay_tails
, str
, Qnil
,
2982 Foverlay_get (overlay
, Qpriority
),
2985 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2987 overlay
= XCAR (ov
);
2988 if (!OVERLAYP (overlay
))
2991 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2992 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2995 if (endpos
!= pos
&& startpos
!= pos
)
2997 window
= Foverlay_get (overlay
, Qwindow
);
2998 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3001 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3002 record_overlay_string (&overlay_heads
, str
,
3004 ? Foverlay_get (overlay
, Qafter_string
)
3006 Foverlay_get (overlay
, Qpriority
),
3008 else if (endpos
== pos
3009 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3010 record_overlay_string (&overlay_tails
, str
, Qnil
,
3011 Foverlay_get (overlay
, Qpriority
),
3014 if (overlay_tails
.used
> 1)
3015 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3017 if (overlay_heads
.used
> 1)
3018 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3020 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3025 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3027 if (total
> overlay_str_len
)
3029 overlay_str_len
= total
;
3030 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3033 p
= overlay_str_buf
;
3034 for (i
= overlay_tails
.used
; --i
>= 0;)
3037 tem
= overlay_tails
.buf
[i
].string
;
3038 nbytes
= copy_text (SDATA (tem
), p
,
3040 STRING_MULTIBYTE (tem
), multibyte
);
3043 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3046 tem
= overlay_heads
.buf
[i
].string
;
3047 nbytes
= copy_text (SDATA (tem
), p
,
3049 STRING_MULTIBYTE (tem
), multibyte
);
3051 tem
= overlay_heads
.buf
[i
].string2
;
3054 nbytes
= copy_text (SDATA (tem
), p
,
3056 STRING_MULTIBYTE (tem
), multibyte
);
3060 if (p
!= overlay_str_buf
+ total
)
3063 *pstr
= overlay_str_buf
;
3069 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3072 recenter_overlay_lists (buf
, pos
)
3076 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
3078 /* See if anything in overlays_before should move to overlays_after. */
3080 /* We don't strictly need prev in this loop; it should always be nil.
3081 But we use it for symmetry and in case that should cease to be true
3082 with some future change. */
3084 for (tail
= buf
->overlays_before
;
3086 prev
= tail
, tail
= next
)
3089 overlay
= XCAR (tail
);
3091 /* If the overlay is not valid, get rid of it. */
3092 if (!OVERLAY_VALID (overlay
))
3097 /* Splice the cons cell TAIL out of overlays_before. */
3101 buf
->overlays_before
= next
;
3107 beg
= OVERLAY_START (overlay
);
3108 end
= OVERLAY_END (overlay
);
3110 if (OVERLAY_POSITION (end
) > pos
)
3112 /* OVERLAY needs to be moved. */
3113 int where
= OVERLAY_POSITION (beg
);
3114 Lisp_Object other
, other_prev
;
3116 /* Splice the cons cell TAIL out of overlays_before. */
3118 XSETCDR (prev
, next
);
3120 buf
->overlays_before
= next
;
3122 /* Search thru overlays_after for where to put it. */
3124 for (other
= buf
->overlays_after
;
3126 other_prev
= other
, other
= XCDR (other
))
3128 Lisp_Object otherbeg
, otheroverlay
;
3130 otheroverlay
= XCAR (other
);
3131 if (! OVERLAY_VALID (otheroverlay
))
3134 otherbeg
= OVERLAY_START (otheroverlay
);
3135 if (OVERLAY_POSITION (otherbeg
) >= where
)
3139 /* Add TAIL to overlays_after before OTHER. */
3140 XSETCDR (tail
, other
);
3141 if (!NILP (other_prev
))
3142 XSETCDR (other_prev
, tail
);
3144 buf
->overlays_after
= tail
;
3148 /* We've reached the things that should stay in overlays_before.
3149 All the rest of overlays_before must end even earlier,
3154 /* See if anything in overlays_after should be in overlays_before. */
3156 for (tail
= buf
->overlays_after
;
3158 prev
= tail
, tail
= next
)
3161 overlay
= XCAR (tail
);
3163 /* If the overlay is not valid, get rid of it. */
3164 if (!OVERLAY_VALID (overlay
))
3169 /* Splice the cons cell TAIL out of overlays_after. */
3173 buf
->overlays_after
= next
;
3179 beg
= OVERLAY_START (overlay
);
3180 end
= OVERLAY_END (overlay
);
3182 /* Stop looking, when we know that nothing further
3183 can possibly end before POS. */
3184 if (OVERLAY_POSITION (beg
) > pos
)
3187 if (OVERLAY_POSITION (end
) <= pos
)
3189 /* OVERLAY needs to be moved. */
3190 int where
= OVERLAY_POSITION (end
);
3191 Lisp_Object other
, other_prev
;
3193 /* Splice the cons cell TAIL out of overlays_after. */
3195 XSETCDR (prev
, next
);
3197 buf
->overlays_after
= next
;
3199 /* Search thru overlays_before for where to put it. */
3201 for (other
= buf
->overlays_before
;
3203 other_prev
= other
, other
= XCDR (other
))
3205 Lisp_Object otherend
, otheroverlay
;
3207 otheroverlay
= XCAR (other
);
3208 if (! OVERLAY_VALID (otheroverlay
))
3211 otherend
= OVERLAY_END (otheroverlay
);
3212 if (OVERLAY_POSITION (otherend
) <= where
)
3216 /* Add TAIL to overlays_before before OTHER. */
3217 XSETCDR (tail
, other
);
3218 if (!NILP (other_prev
))
3219 XSETCDR (other_prev
, tail
);
3221 buf
->overlays_before
= tail
;
3226 XSETFASTINT (buf
->overlay_center
, pos
);
3230 adjust_overlays_for_insert (pos
, length
)
3234 /* After an insertion, the lists are still sorted properly,
3235 but we may need to update the value of the overlay center. */
3236 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3237 XSETFASTINT (current_buffer
->overlay_center
,
3238 XFASTINT (current_buffer
->overlay_center
) + length
);
3242 adjust_overlays_for_delete (pos
, length
)
3246 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3247 /* The deletion was to our right. No change needed; the before- and
3248 after-lists are still consistent. */
3250 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3251 /* The deletion was to our left. We need to adjust the center value
3252 to account for the change in position, but the lists are consistent
3253 given the new value. */
3254 XSETFASTINT (current_buffer
->overlay_center
,
3255 XFASTINT (current_buffer
->overlay_center
) - length
);
3257 /* We're right in the middle. There might be things on the after-list
3258 that now belong on the before-list. Recentering will move them,
3259 and also update the center point. */
3260 recenter_overlay_lists (current_buffer
, pos
);
3263 /* Fix up overlays that were garbled as a result of permuting markers
3264 in the range START through END. Any overlay with at least one
3265 endpoint in this range will need to be unlinked from the overlay
3266 list and reinserted in its proper place.
3267 Such an overlay might even have negative size at this point.
3268 If so, we'll reverse the endpoints. Can you think of anything
3269 better to do in this situation? */
3271 fix_overlays_in_range (start
, end
)
3272 register int start
, end
;
3274 Lisp_Object overlay
;
3275 Lisp_Object before_list
, after_list
;
3276 /* These are either nil, indicating that before_list or after_list
3277 should be assigned, or the cons cell the cdr of which should be
3279 Lisp_Object beforep
= Qnil
, afterp
= Qnil
;
3280 /* 'Parent', likewise, indicates a cons cell or
3281 current_buffer->overlays_before or overlays_after, depending
3282 which loop we're in. */
3283 Lisp_Object tail
, parent
;
3284 int startpos
, endpos
;
3286 /* This algorithm shifts links around instead of consing and GCing.
3287 The loop invariant is that before_list (resp. after_list) is a
3288 well-formed list except that its last element, the CDR of beforep
3289 (resp. afterp) if beforep (afterp) isn't nil or before_list
3290 (after_list) if it is, is still uninitialized. So it's not a bug
3291 that before_list isn't initialized, although it may look
3293 for (parent
= Qnil
, tail
= current_buffer
->overlays_before
; CONSP (tail
);)
3295 overlay
= XCAR (tail
);
3296 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3299 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3301 || (startpos
>= start
&& startpos
< end
))
3303 /* If the overlay is backwards, fix that now. */
3304 if (startpos
> endpos
)
3307 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3309 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3311 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3313 /* Add it to the end of the wrong list. Later on,
3314 recenter_overlay_lists will move it to the right place. */
3315 if (endpos
< XINT (current_buffer
->overlay_center
))
3320 XSETCDR (afterp
, tail
);
3328 XSETCDR (beforep
, tail
);
3332 current_buffer
->overlays_before
= XCDR (tail
);
3334 XSETCDR (parent
, XCDR (tail
));
3338 parent
= tail
, tail
= XCDR (parent
);
3340 for (parent
= Qnil
, tail
= current_buffer
->overlays_after
; CONSP (tail
);)
3342 overlay
= XCAR (tail
);
3343 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3344 if (startpos
>= end
)
3346 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3347 if (startpos
>= start
3348 || (endpos
>= start
&& endpos
< end
))
3350 if (startpos
> endpos
)
3353 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3355 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3357 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3359 if (endpos
< XINT (current_buffer
->overlay_center
))
3364 XSETCDR (afterp
, tail
);
3372 XSETCDR (beforep
, tail
);
3376 current_buffer
->overlays_after
= XCDR (tail
);
3378 XSETCDR (parent
, XCDR (tail
));
3382 parent
= tail
, tail
= XCDR (parent
);
3385 /* Splice the constructed (wrong) lists into the buffer's lists,
3386 and let the recenter function make it sane again. */
3387 if (!NILP (beforep
))
3389 XSETCDR (beforep
, current_buffer
->overlays_before
);
3390 current_buffer
->overlays_before
= before_list
;
3392 recenter_overlay_lists (current_buffer
,
3393 XINT (current_buffer
->overlay_center
));
3397 XSETCDR (afterp
, current_buffer
->overlays_after
);
3398 current_buffer
->overlays_after
= after_list
;
3400 recenter_overlay_lists (current_buffer
,
3401 XINT (current_buffer
->overlay_center
));
3404 /* We have two types of overlay: the one whose ending marker is
3405 after-insertion-marker (this is the usual case) and the one whose
3406 ending marker is before-insertion-marker. When `overlays_before'
3407 contains overlays of the latter type and the former type in this
3408 order and both overlays end at inserting position, inserting a text
3409 increases only the ending marker of the latter type, which results
3410 in incorrect ordering of `overlays_before'.
3412 This function fixes ordering of overlays in the slot
3413 `overlays_before' of the buffer *BP. Before the insertion, `point'
3414 was at PREV, and now is at POS. */
3417 fix_overlays_before (bp
, prev
, pos
)
3421 /* If parent is nil, replace overlays_before; otherwise, XCDR(parent). */
3422 Lisp_Object tail
= bp
->overlays_before
, parent
= Qnil
;
3423 Lisp_Object right_pair
;
3426 /* After the insertion, the several overlays may be in incorrect
3427 order. The possibility is that, in the list `overlays_before',
3428 an overlay which ends at POS appears after an overlay which ends
3429 at PREV. Since POS is greater than PREV, we must fix the
3430 ordering of these overlays, by moving overlays ends at POS before
3431 the overlays ends at PREV. */
3433 /* At first, find a place where disordered overlays should be linked
3434 in. It is where an overlay which end before POS exists. (i.e. an
3435 overlay whose ending marker is after-insertion-marker if disorder
3438 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
))))
3445 /* If we don't find such an overlay,
3446 or the found one ends before PREV,
3447 or the found one is the last one in the list,
3448 we don't have to fix anything. */
3451 || NILP (XCDR (tail
)))
3454 right_pair
= parent
;
3458 /* Now, end position of overlays in the list TAIL should be before
3459 or equal to PREV. In the loop, an overlay which ends at POS is
3460 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3461 we found an overlay which ends before PREV, the remaining
3462 overlays are in correct order. */
3463 while (!NILP (tail
))
3465 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
)));
3468 { /* This overlay is disordered. */
3469 Lisp_Object found
= tail
;
3471 /* Unlink the found overlay. */
3472 tail
= XCDR (found
);
3473 XSETCDR (parent
, tail
);
3474 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3475 and link it into the right place. */
3476 if (NILP (right_pair
))
3478 XSETCDR (found
, bp
->overlays_before
);
3479 bp
->overlays_before
= found
;
3483 XSETCDR (found
, XCDR (right_pair
));
3484 XSETCDR (right_pair
, found
);
3487 else if (end
== prev
)
3492 else /* No more disordered overlay. */
3497 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3498 doc
: /* Return t if OBJECT is an overlay. */)
3502 return (OVERLAYP (object
) ? Qt
: Qnil
);
3505 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3506 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3507 If omitted, BUFFER defaults to the current buffer.
3508 BEG and END may be integers or markers.
3509 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3510 front delimiter advance when text is inserted there.
3511 The fifth arg REAR-ADVANCE, if non-nil, makes the
3512 rear delimiter advance when text is inserted there. */)
3513 (beg
, end
, buffer
, front_advance
, rear_advance
)
3514 Lisp_Object beg
, end
, buffer
;
3515 Lisp_Object front_advance
, rear_advance
;
3517 Lisp_Object overlay
;
3521 XSETBUFFER (buffer
, current_buffer
);
3523 CHECK_BUFFER (buffer
);
3525 && ! EQ (Fmarker_buffer (beg
), buffer
))
3526 error ("Marker points into wrong buffer");
3528 && ! EQ (Fmarker_buffer (end
), buffer
))
3529 error ("Marker points into wrong buffer");
3531 CHECK_NUMBER_COERCE_MARKER (beg
);
3532 CHECK_NUMBER_COERCE_MARKER (end
);
3534 if (XINT (beg
) > XINT (end
))
3537 temp
= beg
; beg
= end
; end
= temp
;
3540 b
= XBUFFER (buffer
);
3542 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3543 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3545 if (!NILP (front_advance
))
3546 XMARKER (beg
)->insertion_type
= 1;
3547 if (!NILP (rear_advance
))
3548 XMARKER (end
)->insertion_type
= 1;
3550 overlay
= allocate_misc ();
3551 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3552 XOVERLAY (overlay
)->start
= beg
;
3553 XOVERLAY (overlay
)->end
= end
;
3554 XOVERLAY (overlay
)->plist
= Qnil
;
3556 /* Put the new overlay on the wrong list. */
3557 end
= OVERLAY_END (overlay
);
3558 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3559 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3561 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3563 /* This puts it in the right list, and in the right order. */
3564 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3566 /* We don't need to redisplay the region covered by the overlay, because
3567 the overlay has no properties at the moment. */
3572 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3575 modify_overlay (buf
, start
, end
)
3586 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3588 /* If this is a buffer not in the selected window,
3589 we must do other windows. */
3590 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3591 windows_or_buffers_changed
= 1;
3592 /* If multiple windows show this buffer, we must do other windows. */
3593 else if (buffer_shared
> 1)
3594 windows_or_buffers_changed
= 1;
3596 ++BUF_OVERLAY_MODIFF (buf
);
3600 Lisp_Object
Fdelete_overlay ();
3602 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3603 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3604 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3605 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3607 (overlay
, beg
, end
, buffer
)
3608 Lisp_Object overlay
, beg
, end
, buffer
;
3610 struct buffer
*b
, *ob
;
3611 Lisp_Object obuffer
;
3612 int count
= SPECPDL_INDEX ();
3614 CHECK_OVERLAY (overlay
);
3616 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3618 XSETBUFFER (buffer
, current_buffer
);
3619 CHECK_BUFFER (buffer
);
3622 && ! EQ (Fmarker_buffer (beg
), buffer
))
3623 error ("Marker points into wrong buffer");
3625 && ! EQ (Fmarker_buffer (end
), buffer
))
3626 error ("Marker points into wrong buffer");
3628 CHECK_NUMBER_COERCE_MARKER (beg
);
3629 CHECK_NUMBER_COERCE_MARKER (end
);
3631 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3632 return Fdelete_overlay (overlay
);
3634 if (XINT (beg
) > XINT (end
))
3637 temp
= beg
; beg
= end
; end
= temp
;
3640 specbind (Qinhibit_quit
, Qt
);
3642 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3643 b
= XBUFFER (buffer
);
3644 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3646 /* If the overlay has changed buffers, do a thorough redisplay. */
3647 if (!EQ (buffer
, obuffer
))
3649 /* Redisplay where the overlay was. */
3650 if (!NILP (obuffer
))
3655 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3656 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3658 modify_overlay (ob
, o_beg
, o_end
);
3661 /* Redisplay where the overlay is going to be. */
3662 modify_overlay (b
, XINT (beg
), XINT (end
));
3665 /* Redisplay the area the overlay has just left, or just enclosed. */
3669 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3670 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3672 if (o_beg
== XINT (beg
))
3673 modify_overlay (b
, o_end
, XINT (end
));
3674 else if (o_end
== XINT (end
))
3675 modify_overlay (b
, o_beg
, XINT (beg
));
3678 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3679 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3680 modify_overlay (b
, o_beg
, o_end
);
3684 if (!NILP (obuffer
))
3686 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3687 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3690 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3691 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3693 /* Put the overlay on the wrong list. */
3694 end
= OVERLAY_END (overlay
);
3695 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3696 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3698 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3700 /* This puts it in the right list, and in the right order. */
3701 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3703 return unbind_to (count
, overlay
);
3706 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3707 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3709 Lisp_Object overlay
;
3713 int count
= SPECPDL_INDEX ();
3715 CHECK_OVERLAY (overlay
);
3717 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3721 b
= XBUFFER (buffer
);
3722 specbind (Qinhibit_quit
, Qt
);
3724 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3725 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3727 marker_position (OVERLAY_START (overlay
)),
3728 marker_position (OVERLAY_END (overlay
)));
3729 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3730 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3732 /* When deleting an overlay with before or after strings, turn off
3733 display optimizations for the affected buffer, on the basis that
3734 these strings may contain newlines. This is easier to do than to
3735 check for that situation during redisplay. */
3736 if (!windows_or_buffers_changed
3737 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3738 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3739 b
->prevent_redisplay_optimizations_p
= 1;
3741 return unbind_to (count
, Qnil
);
3744 /* Overlay dissection functions. */
3746 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3747 doc
: /* Return the position at which OVERLAY starts. */)
3749 Lisp_Object overlay
;
3751 CHECK_OVERLAY (overlay
);
3753 return (Fmarker_position (OVERLAY_START (overlay
)));
3756 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3757 doc
: /* Return the position at which OVERLAY ends. */)
3759 Lisp_Object overlay
;
3761 CHECK_OVERLAY (overlay
);
3763 return (Fmarker_position (OVERLAY_END (overlay
)));
3766 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3767 doc
: /* Return the buffer OVERLAY belongs to. */)
3769 Lisp_Object overlay
;
3771 CHECK_OVERLAY (overlay
);
3773 return Fmarker_buffer (OVERLAY_START (overlay
));
3776 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3777 doc
: /* Return a list of the properties on OVERLAY.
3778 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3781 Lisp_Object overlay
;
3783 CHECK_OVERLAY (overlay
);
3785 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3789 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3790 doc
: /* Return a list of the overlays that contain position POS. */)
3795 Lisp_Object
*overlay_vec
;
3799 CHECK_NUMBER_COERCE_MARKER (pos
);
3802 /* We can't use alloca here because overlays_at can call xrealloc. */
3803 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3805 /* Put all the overlays we want in a vector in overlay_vec.
3806 Store the length in len. */
3807 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3808 (int *) 0, (int *) 0, 0);
3810 /* Make a list of them all. */
3811 result
= Flist (noverlays
, overlay_vec
);
3813 xfree (overlay_vec
);
3817 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3818 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3819 Overlap means that at least one character is contained within the overlay
3820 and also contained within the specified region.
3821 Empty overlays are included in the result if they are located at BEG
3822 or between BEG and END. */)
3824 Lisp_Object beg
, end
;
3827 Lisp_Object
*overlay_vec
;
3831 CHECK_NUMBER_COERCE_MARKER (beg
);
3832 CHECK_NUMBER_COERCE_MARKER (end
);
3835 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3837 /* Put all the overlays we want in a vector in overlay_vec.
3838 Store the length in len. */
3839 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3840 (int *) 0, (int *) 0);
3842 /* Make a list of them all. */
3843 result
= Flist (noverlays
, overlay_vec
);
3845 xfree (overlay_vec
);
3849 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3851 doc
: /* Return the next position after POS where an overlay starts or ends.
3852 If there are no more overlay boundaries after POS, return (point-max). */)
3858 Lisp_Object
*overlay_vec
;
3862 CHECK_NUMBER_COERCE_MARKER (pos
);
3865 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3867 /* Put all the overlays we want in a vector in overlay_vec.
3868 Store the length in len.
3869 endpos gets the position where the next overlay starts. */
3870 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3871 &endpos
, (int *) 0, 1);
3873 /* If any of these overlays ends before endpos,
3874 use its ending point instead. */
3875 for (i
= 0; i
< noverlays
; i
++)
3880 oend
= OVERLAY_END (overlay_vec
[i
]);
3881 oendpos
= OVERLAY_POSITION (oend
);
3882 if (oendpos
< endpos
)
3886 xfree (overlay_vec
);
3887 return make_number (endpos
);
3890 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3891 Sprevious_overlay_change
, 1, 1, 0,
3892 doc
: /* Return the previous position before POS where an overlay starts or ends.
3893 If there are no more overlay boundaries before POS, return (point-min). */)
3899 Lisp_Object
*overlay_vec
;
3902 CHECK_NUMBER_COERCE_MARKER (pos
);
3904 /* At beginning of buffer, we know the answer;
3905 avoid bug subtracting 1 below. */
3906 if (XINT (pos
) == BEGV
)
3910 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3912 /* Put all the overlays we want in a vector in overlay_vec.
3913 Store the length in len.
3914 prevpos gets the position of the previous change. */
3915 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3916 (int *) 0, &prevpos
, 1);
3918 xfree (overlay_vec
);
3919 return make_number (prevpos
);
3922 /* These functions are for debugging overlays. */
3924 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3925 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3926 The car has all the overlays before the overlay center;
3927 the cdr has all the overlays after the overlay center.
3928 Recentering overlays moves overlays between these lists.
3929 The lists you get are copies, so that changing them has no effect.
3930 However, the overlays you get are the real objects that the buffer uses. */)
3933 Lisp_Object before
, after
;
3934 before
= current_buffer
->overlays_before
;
3936 before
= Fcopy_sequence (before
);
3937 after
= current_buffer
->overlays_after
;
3939 after
= Fcopy_sequence (after
);
3941 return Fcons (before
, after
);
3944 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3945 doc
: /* Recenter the overlays of the current buffer around position POS.
3946 That makes overlay lookup faster for positions near POS (but perhaps slower
3947 for positions far away from POS). */)
3951 CHECK_NUMBER_COERCE_MARKER (pos
);
3953 recenter_overlay_lists (current_buffer
, XINT (pos
));
3957 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3958 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
3960 Lisp_Object overlay
, prop
;
3962 CHECK_OVERLAY (overlay
);
3963 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
3966 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3967 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
3968 (overlay
, prop
, value
)
3969 Lisp_Object overlay
, prop
, value
;
3971 Lisp_Object tail
, buffer
;
3974 CHECK_OVERLAY (overlay
);
3976 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3978 for (tail
= XOVERLAY (overlay
)->plist
;
3979 CONSP (tail
) && CONSP (XCDR (tail
));
3980 tail
= XCDR (XCDR (tail
)))
3981 if (EQ (XCAR (tail
), prop
))
3983 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3984 XSETCAR (XCDR (tail
), value
);
3987 /* It wasn't in the list, so add it to the front. */
3988 changed
= !NILP (value
);
3989 XOVERLAY (overlay
)->plist
3990 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3992 if (! NILP (buffer
))
3995 modify_overlay (XBUFFER (buffer
),
3996 marker_position (OVERLAY_START (overlay
)),
3997 marker_position (OVERLAY_END (overlay
)));
3998 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3999 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4000 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4001 Fdelete_overlay (overlay
);
4006 /* Subroutine of report_overlay_modification. */
4008 /* Lisp vector holding overlay hook functions to call.
4009 Vector elements come in pairs.
4010 Each even-index element is a list of hook functions.
4011 The following odd-index element is the overlay they came from.
4013 Before the buffer change, we fill in this vector
4014 as we call overlay hook functions.
4015 After the buffer change, we get the functions to call from this vector.
4016 This way we always call the same functions before and after the change. */
4017 static Lisp_Object last_overlay_modification_hooks
;
4019 /* Number of elements actually used in last_overlay_modification_hooks. */
4020 static int last_overlay_modification_hooks_used
;
4022 /* Add one functionlist/overlay pair
4023 to the end of last_overlay_modification_hooks. */
4026 add_overlay_mod_hooklist (functionlist
, overlay
)
4027 Lisp_Object functionlist
, overlay
;
4029 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4031 if (last_overlay_modification_hooks_used
== oldsize
)
4034 old
= last_overlay_modification_hooks
;
4035 last_overlay_modification_hooks
4036 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4037 bcopy (XVECTOR (old
)->contents
,
4038 XVECTOR (last_overlay_modification_hooks
)->contents
,
4039 sizeof (Lisp_Object
) * oldsize
);
4041 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
4042 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
4045 /* Run the modification-hooks of overlays that include
4046 any part of the text in START to END.
4047 If this change is an insertion, also
4048 run the insert-before-hooks of overlay starting at END,
4049 and the insert-after-hooks of overlay ending at START.
4051 This is called both before and after the modification.
4052 AFTER is nonzero when we call after the modification.
4054 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4055 When AFTER is nonzero, they are the start position,
4056 the position after the inserted new text,
4057 and the length of deleted or replaced old text. */
4060 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4061 Lisp_Object start
, end
;
4063 Lisp_Object arg1
, arg2
, arg3
;
4065 Lisp_Object prop
, overlay
, tail
;
4066 /* 1 if this change is an insertion. */
4067 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4069 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4073 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
4077 /* Call the functions recorded in last_overlay_modification_hooks
4078 rather than scanning the overlays again.
4079 First copy the vector contents, in case some of these hooks
4080 do subsequent modification of the buffer. */
4081 int size
= last_overlay_modification_hooks_used
;
4082 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4085 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4086 copy
, size
* sizeof (Lisp_Object
));
4088 gcpro1
.nvars
= size
;
4090 for (i
= 0; i
< size
;)
4092 Lisp_Object prop
, overlay
;
4094 overlay
= copy
[i
++];
4095 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4101 /* We are being called before a change.
4102 Scan the overlays to find the functions to call. */
4103 last_overlay_modification_hooks_used
= 0;
4105 for (tail
= current_buffer
->overlays_before
;
4109 int startpos
, endpos
;
4110 Lisp_Object ostart
, oend
;
4112 overlay
= XCAR (tail
);
4114 ostart
= OVERLAY_START (overlay
);
4115 oend
= OVERLAY_END (overlay
);
4116 endpos
= OVERLAY_POSITION (oend
);
4117 if (XFASTINT (start
) > endpos
)
4119 startpos
= OVERLAY_POSITION (ostart
);
4120 if (insertion
&& (XFASTINT (start
) == startpos
4121 || XFASTINT (end
) == startpos
))
4123 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4126 /* Copy TAIL in case the hook recenters the overlay lists. */
4128 tail
= Fcopy_sequence (tail
);
4130 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4133 if (insertion
&& (XFASTINT (start
) == endpos
4134 || XFASTINT (end
) == endpos
))
4136 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4140 tail
= Fcopy_sequence (tail
);
4142 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4145 /* Test for intersecting intervals. This does the right thing
4146 for both insertion and deletion. */
4147 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4149 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4153 tail
= Fcopy_sequence (tail
);
4155 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4161 for (tail
= current_buffer
->overlays_after
;
4165 int startpos
, endpos
;
4166 Lisp_Object ostart
, oend
;
4168 overlay
= XCAR (tail
);
4170 ostart
= OVERLAY_START (overlay
);
4171 oend
= OVERLAY_END (overlay
);
4172 startpos
= OVERLAY_POSITION (ostart
);
4173 endpos
= OVERLAY_POSITION (oend
);
4174 if (XFASTINT (end
) < startpos
)
4176 if (insertion
&& (XFASTINT (start
) == startpos
4177 || XFASTINT (end
) == startpos
))
4179 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4183 tail
= Fcopy_sequence (tail
);
4185 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4188 if (insertion
&& (XFASTINT (start
) == endpos
4189 || XFASTINT (end
) == endpos
))
4191 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4195 tail
= Fcopy_sequence (tail
);
4197 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4200 /* Test for intersecting intervals. This does the right thing
4201 for both insertion and deletion. */
4202 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4204 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4208 tail
= Fcopy_sequence (tail
);
4210 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4219 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4220 Lisp_Object list
, overlay
;
4222 Lisp_Object arg1
, arg2
, arg3
;
4224 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4226 GCPRO4 (list
, arg1
, arg2
, arg3
);
4228 add_overlay_mod_hooklist (list
, overlay
);
4230 while (CONSP (list
))
4233 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4235 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4241 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4244 evaporate_overlays (pos
)
4247 Lisp_Object tail
, overlay
, hit_list
;
4250 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4251 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4255 overlay
= XCAR (tail
);
4256 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4259 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4260 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4261 hit_list
= Fcons (overlay
, hit_list
);
4264 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4268 overlay
= XCAR (tail
);
4269 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4272 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4273 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4274 hit_list
= Fcons (overlay
, hit_list
);
4276 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4277 Fdelete_overlay (XCAR (hit_list
));
4280 /* Somebody has tried to store a value with an unacceptable type
4281 in the slot with offset OFFSET. */
4284 buffer_slot_type_mismatch (offset
)
4290 switch (XINT (PER_BUFFER_TYPE (offset
)))
4293 type_name
= "integers";
4297 type_name
= "strings";
4301 type_name
= "symbols";
4308 sym
= PER_BUFFER_SYMBOL (offset
);
4309 error ("Only %s should be stored in the buffer-local variable %s",
4310 type_name
, SDATA (SYMBOL_NAME (sym
)));
4314 /***********************************************************************
4315 Allocation with mmap
4316 ***********************************************************************/
4318 #ifdef USE_MMAP_FOR_BUFFERS
4320 #include <sys/types.h>
4321 #include <sys/mman.h>
4324 #ifdef MAP_ANONYMOUS
4325 #define MAP_ANON MAP_ANONYMOUS
4332 #define MAP_FAILED ((void *) -1)
4345 /* Memory is allocated in regions which are mapped using mmap(2).
4346 The current implementation lets the system select mapped
4347 addresses; we're not using MAP_FIXED in general, except when
4348 trying to enlarge regions.
4350 Each mapped region starts with a mmap_region structure, the user
4351 area starts after that structure, aligned to MEM_ALIGN.
4353 +-----------------------+
4354 | struct mmap_info + |
4356 +-----------------------+
4360 +-----------------------+ */
4364 /* User-specified size. */
4365 size_t nbytes_specified
;
4367 /* Number of bytes mapped */
4368 size_t nbytes_mapped
;
4370 /* Pointer to the location holding the address of the memory
4371 allocated with the mmap'd block. The variable actually points
4372 after this structure. */
4375 /* Next and previous in list of all mmap'd regions. */
4376 struct mmap_region
*next
, *prev
;
4379 /* Doubly-linked list of mmap'd regions. */
4381 static struct mmap_region
*mmap_regions
;
4383 /* File descriptor for mmap. If we don't have anonymous mapping,
4384 /dev/zero will be opened on it. */
4388 /* Temporary storage for mmap_set_vars, see there. */
4390 static struct mmap_region
*mmap_regions_1
;
4391 static int mmap_fd_1
;
4393 /* Page size on this system. */
4395 static int mmap_page_size
;
4397 /* 1 means mmap has been intialized. */
4399 static int mmap_initialized_p
;
4401 /* Value is X rounded up to the next multiple of N. */
4403 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4405 /* Size of mmap_region structure plus padding. */
4407 #define MMAP_REGION_STRUCT_SIZE \
4408 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4410 /* Given a pointer P to the start of the user-visible part of a mapped
4411 region, return a pointer to the start of the region. */
4413 #define MMAP_REGION(P) \
4414 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4416 /* Given a pointer P to the start of a mapped region, return a pointer
4417 to the start of the user-visible part of the region. */
4419 #define MMAP_USER_AREA(P) \
4420 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4422 #define MEM_ALIGN sizeof (double)
4424 /* Predicate returning true if part of the address range [START .. END]
4425 is currently mapped. Used to prevent overwriting an existing
4428 Default is to conservativly assume the address range is occupied by
4429 something else. This can be overridden by system configuration
4430 files if system-specific means to determine this exists. */
4432 #ifndef MMAP_ALLOCATED_P
4433 #define MMAP_ALLOCATED_P(start, end) 1
4436 /* Function prototypes. */
4438 static int mmap_free_1
P_ ((struct mmap_region
*));
4439 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4440 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4441 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4442 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4443 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4444 static void mmap_init
P_ ((void));
4447 /* Return a region overlapping address range START...END, or null if
4448 none. END is not including, i.e. the last byte in the range
4451 static struct mmap_region
*
4452 mmap_find (start
, end
)
4453 POINTER_TYPE
*start
, *end
;
4455 struct mmap_region
*r
;
4456 char *s
= (char *) start
, *e
= (char *) end
;
4458 for (r
= mmap_regions
; r
; r
= r
->next
)
4460 char *rstart
= (char *) r
;
4461 char *rend
= rstart
+ r
->nbytes_mapped
;
4463 if (/* First byte of range, i.e. START, in this region? */
4464 (s
>= rstart
&& s
< rend
)
4465 /* Last byte of range, i.e. END - 1, in this region? */
4466 || (e
> rstart
&& e
<= rend
)
4467 /* First byte of this region in the range? */
4468 || (rstart
>= s
&& rstart
< e
)
4469 /* Last byte of this region in the range? */
4470 || (rend
> s
&& rend
<= e
))
4478 /* Unmap a region. P is a pointer to the start of the user-araa of
4479 the region. Value is non-zero if successful. */
4483 struct mmap_region
*r
;
4486 r
->next
->prev
= r
->prev
;
4488 r
->prev
->next
= r
->next
;
4490 mmap_regions
= r
->next
;
4492 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4494 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4502 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4503 Value is non-zero if successful. */
4506 mmap_enlarge (r
, npages
)
4507 struct mmap_region
*r
;
4510 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4516 /* Unmap pages at the end of the region. */
4517 nbytes
= - npages
* mmap_page_size
;
4518 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4519 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4522 r
->nbytes_mapped
-= nbytes
;
4526 else if (npages
> 0)
4528 nbytes
= npages
* mmap_page_size
;
4530 /* Try to map additional pages at the end of the region. We
4531 cannot do this if the address range is already occupied by
4532 something else because mmap deletes any previous mapping.
4533 I'm not sure this is worth doing, let's see. */
4534 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4538 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4539 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4540 if (p
== MAP_FAILED
)
4541 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4542 else if (p
!= (POINTER_TYPE
*) region_end
)
4544 /* Kernels are free to choose a different address. In
4545 that case, unmap what we've mapped above; we have
4547 if (munmap (p
, nbytes
) == -1)
4548 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4552 r
->nbytes_mapped
+= nbytes
;
4562 /* Set or reset variables holding references to mapped regions. If
4563 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4564 non-zero, set all variables to the start of the user-areas
4567 This function is called from Fdump_emacs to ensure that the dumped
4568 Emacs doesn't contain references to memory that won't be mapped
4569 when Emacs starts. */
4572 mmap_set_vars (restore_p
)
4575 struct mmap_region
*r
;
4579 mmap_regions
= mmap_regions_1
;
4580 mmap_fd
= mmap_fd_1
;
4581 for (r
= mmap_regions
; r
; r
= r
->next
)
4582 *r
->var
= MMAP_USER_AREA (r
);
4586 for (r
= mmap_regions
; r
; r
= r
->next
)
4588 mmap_regions_1
= mmap_regions
;
4589 mmap_regions
= NULL
;
4590 mmap_fd_1
= mmap_fd
;
4596 /* Allocate a block of storage large enough to hold NBYTES bytes of
4597 data. A pointer to the data is returned in *VAR. VAR is thus the
4598 address of some variable which will use the data area.
4600 The allocation of 0 bytes is valid.
4602 If we can't allocate the necessary memory, set *VAR to null, and
4605 static POINTER_TYPE
*
4606 mmap_alloc (var
, nbytes
)
4615 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4616 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4619 if (p
== MAP_FAILED
)
4621 if (errno
!= ENOMEM
)
4622 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4627 struct mmap_region
*r
= (struct mmap_region
*) p
;
4629 r
->nbytes_specified
= nbytes
;
4630 r
->nbytes_mapped
= map
;
4633 r
->next
= mmap_regions
;
4638 p
= MMAP_USER_AREA (p
);
4645 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4646 resize it to size NBYTES. Change *VAR to reflect the new block,
4647 and return this value. If more memory cannot be allocated, then
4648 leave *VAR unchanged, and return null. */
4650 static POINTER_TYPE
*
4651 mmap_realloc (var
, nbytes
)
4655 POINTER_TYPE
*result
;
4660 result
= mmap_alloc (var
, nbytes
);
4661 else if (nbytes
== 0)
4664 result
= mmap_alloc (var
, nbytes
);
4668 struct mmap_region
*r
= MMAP_REGION (*var
);
4669 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4674 POINTER_TYPE
*old_ptr
= *var
;
4676 /* Try to map additional pages at the end of the region.
4677 If that fails, allocate a new region, copy data
4678 from the old region, then free it. */
4679 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4682 r
->nbytes_specified
= nbytes
;
4683 *var
= result
= old_ptr
;
4685 else if (mmap_alloc (var
, nbytes
))
4687 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4688 mmap_free_1 (MMAP_REGION (old_ptr
));
4690 r
= MMAP_REGION (result
);
4691 r
->nbytes_specified
= nbytes
;
4699 else if (room
- nbytes
>= mmap_page_size
)
4701 /* Shrinking by at least a page. Let's give some
4702 memory back to the system.
4704 The extra parens are to make the division happens first,
4705 on positive values, so we know it will round towards
4707 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4709 r
->nbytes_specified
= nbytes
;
4713 /* Leave it alone. */
4715 r
->nbytes_specified
= nbytes
;
4723 /* Free a block of relocatable storage whose data is pointed to by
4724 PTR. Store 0 in *PTR to show there's no block allocated. */
4734 mmap_free_1 (MMAP_REGION (*var
));
4740 /* Perform necessary intializations for the use of mmap. */
4746 /* The value of mmap_fd is initially 0 in temacs, and -1
4747 in a dumped Emacs. */
4750 /* No anonymous mmap -- we need the file descriptor. */
4751 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4753 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4755 #endif /* MAP_ANON == 0 */
4757 if (mmap_initialized_p
)
4759 mmap_initialized_p
= 1;
4765 mmap_page_size
= getpagesize ();
4768 #endif /* USE_MMAP_FOR_BUFFERS */
4772 /***********************************************************************
4773 Buffer-text Allocation
4774 ***********************************************************************/
4777 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4778 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4779 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4780 #endif /* REL_ALLOC */
4783 /* Allocate NBYTES bytes for buffer B's text buffer. */
4786 alloc_buffer_text (b
, nbytes
)
4793 #if defined USE_MMAP_FOR_BUFFERS
4794 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4795 #elif defined REL_ALLOC
4796 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4798 p
= xmalloc (nbytes
);
4807 b
->text
->beg
= (unsigned char *) p
;
4811 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4815 enlarge_buffer_text (b
, delta
)
4820 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4823 #if defined USE_MMAP_FOR_BUFFERS
4824 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4825 #elif defined REL_ALLOC
4826 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4828 p
= xrealloc (b
->text
->beg
, nbytes
);
4837 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4842 /* Free buffer B's text buffer. */
4845 free_buffer_text (b
)
4850 #if defined USE_MMAP_FOR_BUFFERS
4851 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4852 #elif defined REL_ALLOC
4853 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4855 xfree (b
->text
->beg
);
4858 BUF_BEG_ADDR (b
) = NULL
;
4864 /***********************************************************************
4866 ***********************************************************************/
4873 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4875 /* Make sure all markable slots in buffer_defaults
4876 are initialized reasonably, so mark_buffer won't choke. */
4877 reset_buffer (&buffer_defaults
);
4878 reset_buffer_local_variables (&buffer_defaults
, 1);
4879 reset_buffer (&buffer_local_symbols
);
4880 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4881 /* Prevent GC from getting confused. */
4882 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4883 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4884 BUF_INTERVALS (&buffer_defaults
) = 0;
4885 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4886 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4887 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4889 /* Set up the default values of various buffer slots. */
4890 /* Must do these before making the first buffer! */
4892 /* real setup is done in bindings.el */
4893 buffer_defaults
.mode_line_format
= build_string ("%-");
4894 buffer_defaults
.header_line_format
= Qnil
;
4895 buffer_defaults
.abbrev_mode
= Qnil
;
4896 buffer_defaults
.overwrite_mode
= Qnil
;
4897 buffer_defaults
.case_fold_search
= Qt
;
4898 buffer_defaults
.auto_fill_function
= Qnil
;
4899 buffer_defaults
.selective_display
= Qnil
;
4901 buffer_defaults
.selective_display_ellipses
= Qt
;
4903 buffer_defaults
.abbrev_table
= Qnil
;
4904 buffer_defaults
.display_table
= Qnil
;
4905 buffer_defaults
.undo_list
= Qnil
;
4906 buffer_defaults
.mark_active
= Qnil
;
4907 buffer_defaults
.file_format
= Qnil
;
4908 buffer_defaults
.overlays_before
= Qnil
;
4909 buffer_defaults
.overlays_after
= Qnil
;
4910 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4912 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4913 buffer_defaults
.truncate_lines
= Qnil
;
4914 buffer_defaults
.ctl_arrow
= Qt
;
4915 buffer_defaults
.direction_reversed
= Qnil
;
4916 buffer_defaults
.cursor_type
= Qt
;
4917 buffer_defaults
.extra_line_spacing
= Qnil
;
4920 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4922 buffer_defaults
.enable_multibyte_characters
= Qt
;
4923 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4924 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4925 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4926 buffer_defaults
.cache_long_line_scans
= Qnil
;
4927 buffer_defaults
.file_truename
= Qnil
;
4928 XSETFASTINT (buffer_defaults
.display_count
, 0);
4929 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
4930 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
4931 buffer_defaults
.left_fringe_width
= Qnil
;
4932 buffer_defaults
.right_fringe_width
= Qnil
;
4933 buffer_defaults
.fringes_outside_margins
= Qnil
;
4934 buffer_defaults
.scroll_bar_width
= Qnil
;
4935 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
4936 buffer_defaults
.indicate_empty_lines
= Qnil
;
4937 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4938 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4939 buffer_defaults
.display_time
= Qnil
;
4941 /* Assign the local-flags to the slots that have default values.
4942 The local flag is a bit that is used in the buffer
4943 to say that it has its own local value for the slot.
4944 The local flag bits are in the local_var_flags slot of the buffer. */
4946 /* Nothing can work if this isn't true */
4947 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4949 /* 0 means not a lisp var, -1 means always local, else mask */
4950 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4951 XSETINT (buffer_local_flags
.filename
, -1);
4952 XSETINT (buffer_local_flags
.directory
, -1);
4953 XSETINT (buffer_local_flags
.backed_up
, -1);
4954 XSETINT (buffer_local_flags
.save_length
, -1);
4955 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4956 XSETINT (buffer_local_flags
.read_only
, -1);
4957 XSETINT (buffer_local_flags
.major_mode
, -1);
4958 XSETINT (buffer_local_flags
.mode_name
, -1);
4959 XSETINT (buffer_local_flags
.undo_list
, -1);
4960 XSETINT (buffer_local_flags
.mark_active
, -1);
4961 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4962 XSETINT (buffer_local_flags
.file_truename
, -1);
4963 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4964 XSETINT (buffer_local_flags
.file_format
, -1);
4965 XSETINT (buffer_local_flags
.display_count
, -1);
4966 XSETINT (buffer_local_flags
.display_time
, -1);
4967 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4970 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4971 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4972 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4973 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4974 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4975 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4977 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4979 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4980 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4981 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4982 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4983 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4984 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4985 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4987 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4988 /* Make this one a permanent local. */
4989 buffer_permanent_local_flags
[idx
++] = 1;
4991 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4992 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4993 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4994 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4995 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4996 /* Make this one a permanent local. */
4997 buffer_permanent_local_flags
[idx
++] = 1;
4998 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
4999 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5000 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5001 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5002 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5003 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5004 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5005 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5006 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5007 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5008 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5009 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5010 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5012 /* Need more room? */
5013 if (idx
>= MAX_PER_BUFFER_VARS
)
5015 last_per_buffer_idx
= idx
;
5017 Vbuffer_alist
= Qnil
;
5021 QSFundamental
= build_string ("Fundamental");
5023 Qfundamental_mode
= intern ("fundamental-mode");
5024 buffer_defaults
.major_mode
= Qfundamental_mode
;
5026 Qmode_class
= intern ("mode-class");
5028 Qprotected_field
= intern ("protected-field");
5030 Qpermanent_local
= intern ("permanent-local");
5032 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5034 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5036 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5038 /* super-magic invisible buffer */
5039 Vbuffer_alist
= Qnil
;
5041 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5043 inhibit_modification_hooks
= 0;
5049 char buf
[MAXPATHLEN
+ 1];
5051 struct stat dotstat
, pwdstat
;
5055 #ifdef USE_MMAP_FOR_BUFFERS
5057 /* When using the ralloc implementation based on mmap(2), buffer
5058 text pointers will have been set to null in the dumped Emacs.
5062 for (b
= all_buffers
; b
; b
= b
->next
)
5063 if (b
->text
->beg
== NULL
)
5064 enlarge_buffer_text (b
, 0);
5066 #endif /* USE_MMAP_FOR_BUFFERS */
5068 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5069 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5070 Fset_buffer_multibyte (Qnil
);
5072 /* If PWD is accurate, use it instead of calling getwd. PWD is
5073 sometimes a nicer name, and using it may avoid a fatal error if a
5074 parent directory is searchable but not readable. */
5075 if ((pwd
= getenv ("PWD")) != 0
5076 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5077 && stat (pwd
, &pwdstat
) == 0
5078 && stat (".", &dotstat
) == 0
5079 && dotstat
.st_ino
== pwdstat
.st_ino
5080 && dotstat
.st_dev
== pwdstat
.st_dev
5081 && strlen (pwd
) < MAXPATHLEN
)
5084 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5085 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5087 else if (getwd (buf
) == 0)
5088 fatal ("`getwd' failed: %s\n", buf
);
5092 /* Maybe this should really use some standard subroutine
5093 whose definition is filename syntax dependent. */
5095 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5097 buf
[rc
] = DIRECTORY_SEP
;
5100 #endif /* not VMS */
5102 current_buffer
->directory
= build_string (buf
);
5104 /* Add /: to the front of the name
5105 if it would otherwise be treated as magic. */
5106 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5108 /* If the default dir is just /, TEMP is non-nil
5109 because of the ange-ftp completion handler.
5110 However, it is not necessary to turn / into /:/.
5111 So avoid doing that. */
5112 && strcmp ("/", SDATA (current_buffer
->directory
)))
5113 current_buffer
->directory
5114 = concat2 (build_string ("/:"), current_buffer
->directory
);
5116 temp
= get_minibuffer (0);
5117 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5120 /* initialize the buffer routines */
5124 staticpro (&last_overlay_modification_hooks
);
5125 last_overlay_modification_hooks
5126 = Fmake_vector (make_number (10), Qnil
);
5128 staticpro (&Vbuffer_defaults
);
5129 staticpro (&Vbuffer_local_symbols
);
5130 staticpro (&Qfundamental_mode
);
5131 staticpro (&Qmode_class
);
5132 staticpro (&QSFundamental
);
5133 staticpro (&Vbuffer_alist
);
5134 staticpro (&Qprotected_field
);
5135 staticpro (&Qpermanent_local
);
5136 staticpro (&Qkill_buffer_hook
);
5137 Qoverlayp
= intern ("overlayp");
5138 staticpro (&Qoverlayp
);
5139 Qevaporate
= intern ("evaporate");
5140 staticpro (&Qevaporate
);
5141 Qmodification_hooks
= intern ("modification-hooks");
5142 staticpro (&Qmodification_hooks
);
5143 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5144 staticpro (&Qinsert_in_front_hooks
);
5145 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5146 staticpro (&Qinsert_behind_hooks
);
5147 Qget_file_buffer
= intern ("get-file-buffer");
5148 staticpro (&Qget_file_buffer
);
5149 Qpriority
= intern ("priority");
5150 staticpro (&Qpriority
);
5151 Qwindow
= intern ("window");
5152 staticpro (&Qwindow
);
5153 Qbefore_string
= intern ("before-string");
5154 staticpro (&Qbefore_string
);
5155 Qafter_string
= intern ("after-string");
5156 staticpro (&Qafter_string
);
5157 Qfirst_change_hook
= intern ("first-change-hook");
5158 staticpro (&Qfirst_change_hook
);
5159 Qbefore_change_functions
= intern ("before-change-functions");
5160 staticpro (&Qbefore_change_functions
);
5161 Qafter_change_functions
= intern ("after-change-functions");
5162 staticpro (&Qafter_change_functions
);
5163 staticpro (&Qucs_set_table_for_input
);
5165 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5166 staticpro (&Qkill_buffer_query_functions
);
5168 Fput (Qprotected_field
, Qerror_conditions
,
5169 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5170 Fput (Qprotected_field
, Qerror_message
,
5171 build_string ("Attempt to modify a protected field"));
5173 /* All these use DEFVAR_LISP_NOPRO because the slots in
5174 buffer_defaults will all be marked via Vbuffer_defaults. */
5176 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5177 &buffer_defaults
.mode_line_format
,
5178 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5179 This is the same as (default-value 'mode-line-format). */);
5181 DEFVAR_LISP_NOPRO ("default-header-line-format",
5182 &buffer_defaults
.header_line_format
,
5183 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5184 This is the same as (default-value 'header-line-format). */);
5186 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5187 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5188 This is the same as (default-value 'cursor-type). */);
5190 DEFVAR_LISP_NOPRO ("default-line-spacing",
5191 &buffer_defaults
.extra_line_spacing
,
5192 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5193 This is the same as (default-value 'line-spacing). */);
5195 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5196 &buffer_defaults
.abbrev_mode
,
5197 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5198 This is the same as (default-value 'abbrev-mode). */);
5200 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5201 &buffer_defaults
.ctl_arrow
,
5202 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5203 This is the same as (default-value 'ctl-arrow). */);
5205 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5206 &buffer_defaults
.direction_reversed
,
5207 doc
: /* Default value of `direction_reversed' for buffers that do not override it.
5208 This is the same as (default-value 'direction-reversed). */);
5210 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5211 &buffer_defaults
.enable_multibyte_characters
,
5212 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5213 This is the same as (default-value 'enable-multibyte-characters). */);
5215 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5216 &buffer_defaults
.buffer_file_coding_system
,
5217 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5218 This is the same as (default-value 'buffer-file-coding-system). */);
5220 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5221 &buffer_defaults
.truncate_lines
,
5222 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5223 This is the same as (default-value 'truncate-lines). */);
5225 DEFVAR_LISP_NOPRO ("default-fill-column",
5226 &buffer_defaults
.fill_column
,
5227 doc
: /* Default value of `fill-column' for buffers that do not override it.
5228 This is the same as (default-value 'fill-column). */);
5230 DEFVAR_LISP_NOPRO ("default-left-margin",
5231 &buffer_defaults
.left_margin
,
5232 doc
: /* Default value of `left-margin' for buffers that do not override it.
5233 This is the same as (default-value 'left-margin). */);
5235 DEFVAR_LISP_NOPRO ("default-tab-width",
5236 &buffer_defaults
.tab_width
,
5237 doc
: /* Default value of `tab-width' for buffers that do not override it.
5238 This is the same as (default-value 'tab-width). */);
5240 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5241 &buffer_defaults
.case_fold_search
,
5242 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5243 This is the same as (default-value 'case-fold-search). */);
5246 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5247 &buffer_defaults
.buffer_file_type
,
5248 doc
: /* Default file type for buffers that do not override it.
5249 This is the same as (default-value 'buffer-file-type).
5250 The file type is nil for text, t for binary. */);
5253 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5254 &buffer_defaults
.left_margin_cols
,
5255 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5256 This is the same as (default-value 'left-margin-width). */);
5258 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5259 &buffer_defaults
.right_margin_cols
,
5260 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5261 This is the same as (default-value 'right-margin-width). */);
5263 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5264 &buffer_defaults
.left_fringe_width
,
5265 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5266 This is the same as (default-value 'left-fringe-width). */);
5268 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5269 &buffer_defaults
.right_fringe_width
,
5270 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5271 This is the same as (default-value 'right-fringe-width). */);
5273 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5274 &buffer_defaults
.fringes_outside_margins
,
5275 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5276 This is the same as (default-value 'fringes-outside-margins). */);
5278 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5279 &buffer_defaults
.scroll_bar_width
,
5280 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5281 This is the same as (default-value 'scroll-bar-width). */);
5283 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5284 &buffer_defaults
.vertical_scroll_bar_type
,
5285 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5286 This is the same as (default-value 'vertical-scroll-bar). */);
5288 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5289 &buffer_defaults
.indicate_empty_lines
,
5290 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5291 This is the same as (default-value 'indicate-empty-lines). */);
5293 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5294 &buffer_defaults
.scroll_up_aggressively
,
5295 doc
: /* Default value of `scroll-up-aggressively'.
5296 This value applies in buffers that don't have their own local values.
5297 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5299 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5300 &buffer_defaults
.scroll_down_aggressively
,
5301 doc
: /* Default value of `scroll-down-aggressively'.
5302 This value applies in buffers that don't have their own local values.
5303 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5305 DEFVAR_PER_BUFFER ("header-line-format",
5306 ¤t_buffer
->header_line_format
,
5308 doc
: /* Analogous to `mode-line-format', but controls the header line.
5309 The header line appears, optionally, at the top of a window;
5310 the mode line appears at the bottom. */);
5312 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5314 doc
: /* Template for displaying mode line for current buffer.
5315 Each buffer has its own value of this variable.
5316 Value may be nil, a string, a symbol or a list or cons cell.
5317 A value of nil means don't display a mode line.
5318 For a symbol, its value is used (but it is ignored if t or nil).
5319 A string appearing directly as the value of a symbol is processed verbatim
5320 in that the %-constructs below are not recognized.
5321 Note that unless the symbol is marked as a `risky-local-variable', all
5322 properties in any strings, as well as all :eval and :propertize forms
5323 in the value of that symbol will be ignored.
5324 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5325 is used as a mode line element. Be careful--FORM should not load any files,
5326 because that can cause an infinite recursion.
5327 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5328 with the specified properties PROPS applied.
5329 For a list whose car is a symbol, the symbol's value is taken,
5330 and if that is non-nil, the cadr of the list is processed recursively.
5331 Otherwise, the caddr of the list (if there is one) is processed.
5332 For a list whose car is a string or list, each element is processed
5333 recursively and the results are effectively concatenated.
5334 For a list whose car is an integer, the cdr of the list is processed
5335 and padded (if the number is positive) or truncated (if negative)
5336 to the width specified by that number.
5337 A string is printed verbatim in the mode line except for %-constructs:
5338 (%-constructs are allowed when the string is the entire mode-line-format
5339 or when it is found in a cons-cell or a list)
5340 %b -- print buffer name. %f -- print visited file name.
5341 %F -- print frame name.
5342 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5343 %& is like %*, but ignore read-only-ness.
5344 % means buffer is read-only and * means it is modified.
5345 For a modified read-only buffer, %* gives % and %+ gives *.
5346 %s -- print process status. %l -- print the current line number.
5347 %c -- print the current column number (this makes editing slower).
5348 To make the column number update correctly in all cases,
5349 `column-number-mode' must be non-nil.
5350 %p -- print percent of buffer above top of window, or Top, Bot or All.
5351 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5352 or print Bottom or All.
5353 %m -- print the mode name.
5354 %n -- print Narrow if appropriate.
5355 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5356 %Z -- like %z, but including the end-of-line format.
5357 %[ -- print one [ for each recursive editing level. %] similar.
5358 %% -- print %. %- -- print infinitely many dashes.
5359 Decimal digits after the % specify field width to which to pad. */);
5361 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5362 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5363 nil here means use current buffer's major mode. */);
5365 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5366 make_number (Lisp_Symbol
),
5367 doc
: /* Symbol for current buffer's major mode. */);
5369 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5371 doc
: /* Pretty name of current buffer's major mode (a string). */);
5373 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5374 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5376 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5378 doc
: /* *Non-nil if searches and matches should ignore case. */);
5380 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5381 make_number (Lisp_Int
),
5382 doc
: /* *Column beyond which automatic line-wrapping should happen.
5383 Interactively, you can set this using \\[set-fill-column]. */);
5385 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5386 make_number (Lisp_Int
),
5387 doc
: /* *Column for the default indent-line-function to indent to.
5388 Linefeed indents to this column in Fundamental mode. */);
5390 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5391 make_number (Lisp_Int
),
5392 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5394 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5395 doc
: /* *Non-nil means display control chars with uparrow.
5396 A value of nil means use backslash and octal digits.
5397 This variable does not apply to characters whose display is specified
5398 in the current display table (if there is one). */);
5400 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5401 ¤t_buffer
->enable_multibyte_characters
,
5403 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5404 Otherwise they are regarded as unibyte. This affects the display,
5405 file I/O and the behavior of various editing commands.
5407 This variable is buffer-local but you cannot set it directly;
5408 use the function `set-buffer-multibyte' to change a buffer's representation.
5409 Changing its default value with `setq-default' is supported.
5410 See also variable `default-enable-multibyte-characters' and Info node
5411 `(elisp)Text Representations'. */);
5412 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5414 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5415 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5416 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5417 This variable applies to saving the buffer, and also to `write-region'
5418 and other functions that use `write-region'.
5419 It does not apply to sending output to subprocesses, however.
5421 If this is nil, the buffer is saved without any code conversion
5422 unless some coding system is specified in `file-coding-system-alist'
5423 for the buffer file.
5425 If the text to be saved cannot be encoded as specified by this variable,
5426 an alternative encoding is selected by `select-safe-coding-system', which see.
5428 The variable `coding-system-for-write', if non-nil, overrides this variable.
5430 This variable is never applied to a way of decoding a file while reading it. */);
5432 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5434 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5436 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5437 doc
: /* *Non-nil means do not display continuation lines.
5438 Instead, give each line of text just one screen line.
5440 Note that this is overridden by the variable
5441 `truncate-partial-width-windows' if that variable is non-nil
5442 and this buffer is not full-frame width. */);
5445 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5447 doc
: /* Non-nil if the visited file is a binary file.
5448 This variable is meaningful on MS-DOG and Windows NT.
5449 On those systems, it is automatically local in every buffer.
5450 On other systems, this variable is normally always nil. */);
5453 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5454 make_number (Lisp_String
),
5455 doc
: /* Name of default directory of current buffer. Should end with slash.
5456 To interactively change the default directory, use command `cd'. */);
5458 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5460 doc
: /* Function called (if non-nil) to perform auto-fill.
5461 It is called after self-inserting any character specified in
5462 the `auto-fill-chars' table.
5463 NOTE: This variable is not a hook;
5464 its value may not be a list of functions. */);
5466 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5467 make_number (Lisp_String
),
5468 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5470 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5471 make_number (Lisp_String
),
5472 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5473 The truename of a file is calculated by `file-truename'
5474 and then abbreviated with `abbreviate-file-name'. */);
5476 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5477 ¤t_buffer
->auto_save_file_name
,
5478 make_number (Lisp_String
),
5479 doc
: /* Name of file for auto-saving current buffer.
5480 If it is nil, that means don't auto-save this buffer. */);
5482 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5483 doc
: /* Non-nil if this buffer is read-only. */);
5485 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5486 doc
: /* Non-nil if this buffer's file has been backed up.
5487 Backing up is done before the first time the file is saved. */);
5489 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5490 make_number (Lisp_Int
),
5491 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5494 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5496 doc
: /* Non-nil enables selective display.
5497 An Integer N as value means display only lines
5498 that start with less than n columns of space.
5499 A value of t means that the character ^M makes itself and
5500 all the rest of the line invisible; also, when saving the buffer
5501 in a file, save the ^M as a newline. */);
5504 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5505 ¤t_buffer
->selective_display_ellipses
,
5507 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5510 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5511 doc
: /* Non-nil if self-insertion should replace existing text.
5512 The value should be one of `overwrite-mode-textual',
5513 `overwrite-mode-binary', or nil.
5514 If it is `overwrite-mode-textual', self-insertion still
5515 inserts at the end of a line, and inserts when point is before a tab,
5516 until the tab is filled in.
5517 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5519 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5521 doc
: /* Display table that controls display of the contents of current buffer.
5523 If this variable is nil, the value of `standard-display-table' is used.
5524 Each window can have its own, overriding display table, see
5525 `set-window-display-table' and `window-display-table'.
5527 The display table is a char-table created with `make-display-table'.
5528 A char-table is an array indexed by character codes. Normal array
5529 primitives `aref' and `aset' can be used to access elements of a char-table.
5531 Each of the char-table elements control how to display the corresponding
5532 text character: the element at index C in the table says how to display
5533 the character whose code is C. Each element should be a vector of
5534 characters or nil. nil means display the character in the default fashion;
5535 otherwise, the characters from the vector are delivered to the screen
5536 instead of the original character.
5538 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5539 a capital Y instead of each X character.
5541 In addition, a char-table has six extra slots to control the display of:
5543 the end of a truncated screen line (extra-slot 0, a single character);
5544 the end of a continued line (extra-slot 1, a single character);
5545 the escape character used to display character codes in octal
5546 (extra-slot 2, a single character);
5547 the character used as an arrow for control characters (extra-slot 3,
5548 a single character);
5549 the decoration indicating the presence of invisible lines (extra-slot 4,
5550 a vector of characters);
5551 the character used to draw the border between side-by-side windows
5552 (extra-slot 5, a single character).
5554 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5556 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5558 doc
: /* *Width of left marginal area for display of a buffer.
5559 A value of nil means no marginal area. */);
5561 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5563 doc
: /* *Width of right marginal area for display of a buffer.
5564 A value of nil means no marginal area. */);
5566 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5568 doc
: /* *Width of this buffer's left fringe (in pixels).
5569 A value of 0 means no left fringe is shown in this buffer's window.
5570 A value of nil means to use the left fringe width from the window's frame. */);
5572 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5574 doc
: /* *Width of this buffer's right fringe (in pixels).
5575 A value of 0 means no right fringe is shown in this buffer's window.
5576 A value of nil means to use the right fringe width from the window's frame. */);
5578 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5580 doc
: /* *Non-nil means to display fringes outside display margins.
5581 A value of nil means to display fringes between margins and buffer text. */);
5583 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5585 doc
: /* *Width of this buffer's scroll bars in pixels.
5586 A value of nil means to use the scroll bar width from the window's frame. */);
5588 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5590 doc
: /* *Position of this buffer's vertical scroll bar.
5591 A value of left or right means to place the vertical scroll bar at that side
5592 of the window; a value of nil means that this window has no vertical scroll bar.
5593 A value of t means to use the vertical scroll bar type from the window's frame. */);
5595 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5596 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5597 doc
: /* *Visually indicate empty lines after the buffer end.
5598 If non-nil, a bitmap is displayed in the left fringe of a window on
5599 window-systems. */);
5601 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5602 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5603 doc
: /* How far to scroll windows upward.
5604 If you move point off the bottom, the window scrolls automatically.
5605 This variable controls how far it scrolls. nil, the default,
5606 means scroll to center point. A fraction means scroll to put point
5607 that fraction of the window's height from the bottom of the window.
5608 When the value is 0.0, point goes at the bottom line, which in the simple
5609 case that you moved off with C-f means scrolling just one line. 1.0 means
5610 point goes at the top, so that in that simple case, the window
5611 window scrolls by a full window height. Meaningful values are
5612 between 0.0 and 1.0, inclusive. */);
5614 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5615 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5616 doc
: /* How far to scroll windows downward.
5617 If you move point off the top, the window scrolls automatically.
5618 This variable controls how far it scrolls. nil, the default,
5619 means scroll to center point. A fraction means scroll to put point
5620 that fraction of the window's height from the top of the window.
5621 When the value is 0.0, point goes at the top line, which in the simple
5622 case that you moved off with C-b means scrolling just one line. 1.0 means
5623 point goes at the bottom, so that in that simple case, the window
5624 window scrolls by a full window height. Meaningful values are
5625 between 0.0 and 1.0, inclusive. */);
5627 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5631 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5632 doc
: /* List of functions to call before each text change.
5633 Two arguments are passed to each function: the positions of
5634 the beginning and end of the range of old text to be changed.
5635 \(For an insertion, the beginning and end are at the same place.)
5636 No information is given about the length of the text after the change.
5638 Buffer changes made while executing the `before-change-functions'
5639 don't call any before-change or after-change functions.
5640 That's because these variables are temporarily set to nil.
5641 As a result, a hook function cannot straightforwardly alter the value of
5642 these variables. See the Emacs Lisp manual for a way of
5643 accomplishing an equivalent result by using other variables.
5645 If an unhandled error happens in running these functions,
5646 the variable's value remains nil. That prevents the error
5647 from happening repeatedly and making Emacs nonfunctional. */);
5648 Vbefore_change_functions
= Qnil
;
5650 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5651 doc
: /* List of functions to call after each text change.
5652 Three arguments are passed to each function: the positions of
5653 the beginning and end of the range of changed text,
5654 and the length in bytes of the pre-change text replaced by that range.
5655 \(For an insertion, the pre-change length is zero;
5656 for a deletion, that length is the number of bytes deleted,
5657 and the post-change beginning and end are at the same place.)
5659 Buffer changes made while executing the `after-change-functions'
5660 don't call any before-change or after-change functions.
5661 That's because these variables are temporarily set to nil.
5662 As a result, a hook function cannot straightforwardly alter the value of
5663 these variables. See the Emacs Lisp manual for a way of
5664 accomplishing an equivalent result by using other variables.
5666 If an unhandled error happens in running these functions,
5667 the variable's value remains nil. That prevents the error
5668 from happening repeatedly and making Emacs nonfunctional. */);
5669 Vafter_change_functions
= Qnil
;
5671 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5672 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5673 The functions are run using the `run-hooks' function. */);
5674 Vfirst_change_hook
= Qnil
;
5676 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5677 doc
: /* List of undo entries in current buffer.
5678 Recent changes come first; older changes follow newer.
5680 An entry (BEG . END) represents an insertion which begins at
5681 position BEG and ends at position END.
5683 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5684 from (abs POSITION). If POSITION is positive, point was at the front
5685 of the text being deleted; if negative, point was at the end.
5687 An entry (t HIGH . LOW) indicates that the buffer previously had
5688 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5689 of the visited file's modification time, as of that time. If the
5690 modification time of the most recent save is different, this entry is
5693 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5694 was modified between BEG and END. PROPERTY is the property name,
5695 and VALUE is the old value.
5697 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5698 was adjusted in position by the offset DISTANCE (an integer).
5700 An entry of the form POSITION indicates that point was at the buffer
5701 location given by the integer. Undoing an entry of this form places
5704 nil marks undo boundaries. The undo command treats the changes
5705 between two undo boundaries as a single step to be undone.
5707 If the value of the variable is t, undo information is not recorded. */);
5709 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5710 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5712 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5713 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5715 Normally, the line-motion functions work by scanning the buffer for
5716 newlines. Columnar operations (like move-to-column and
5717 compute-motion) also work by scanning the buffer, summing character
5718 widths as they go. This works well for ordinary text, but if the
5719 buffer's lines are very long (say, more than 500 characters), these
5720 motion functions will take longer to execute. Emacs may also take
5721 longer to update the display.
5723 If cache-long-line-scans is non-nil, these motion functions cache the
5724 results of their scans, and consult the cache to avoid rescanning
5725 regions of the buffer until the text is modified. The caches are most
5726 beneficial when they prevent the most searching---that is, when the
5727 buffer contains long lines and large regions of characters with the
5728 same, fixed screen width.
5730 When cache-long-line-scans is non-nil, processing short lines will
5731 become slightly slower (because of the overhead of consulting the
5732 cache), and the caches will use memory roughly proportional to the
5733 number of newlines and characters whose screen width varies.
5735 The caches require no explicit maintenance; their accuracy is
5736 maintained internally by the Emacs primitives. Enabling or disabling
5737 the cache should not affect the behavior of any of the motion
5738 functions; it should only affect their performance. */);
5740 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5741 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5743 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5744 doc
: /* List of formats to use when saving this buffer.
5745 Formats are defined by `format-alist'. This variable is
5746 set when a file is visited. */);
5748 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5749 ¤t_buffer
->invisibility_spec
, Qnil
,
5750 doc
: /* Invisibility spec of this buffer.
5751 The default is t, which means that text is invisible
5752 if it has a non-nil `invisible' property.
5753 If the value is a list, a text character is invisible if its `invisible'
5754 property is an element in that list.
5755 If an element is a cons cell of the form (PROP . ELLIPSIS),
5756 then characters with property value PROP are invisible,
5757 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5759 DEFVAR_PER_BUFFER ("buffer-display-count",
5760 ¤t_buffer
->display_count
, Qnil
,
5761 doc
: /* A number incremented each time this buffer is displayed in a window.
5762 The function `set-window-buffer' increments it. */);
5764 DEFVAR_PER_BUFFER ("buffer-display-time",
5765 ¤t_buffer
->display_time
, Qnil
,
5766 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5767 The function `set-window-buffer' updates this variable
5768 to the value obtained by calling `current-time'.
5769 If the buffer has never been shown in a window, the value is nil. */);
5771 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5772 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5773 Non-nil also enables highlighting of the region whenever the mark is active.
5774 The variable `highlight-nonselected-windows' controls whether to highlight
5775 all windows or just the selected window. */);
5776 Vtransient_mark_mode
= Qnil
;
5778 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5779 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5780 If the value is t, disregard `buffer-read-only' and all `read-only'
5781 text properties. If the value is a list, disregard `buffer-read-only'
5782 and disregard a `read-only' text property if the property value
5783 is a member of the list. */);
5784 Vinhibit_read_only
= Qnil
;
5786 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5787 doc
: /* Cursor to use when this buffer is in the selected window.
5788 Values are interpreted as follows:
5790 t use the cursor specified for the frame
5791 nil don't display a cursor
5792 bar display a bar cursor with default width
5793 (bar . WIDTH) display a bar cursor with width WIDTH
5794 ANYTHING ELSE display a box cursor.
5796 When the buffer is displayed in a nonselected window,
5797 this variable has no effect; the cursor appears as a hollow box. */);
5799 DEFVAR_PER_BUFFER ("line-spacing",
5800 ¤t_buffer
->extra_line_spacing
, Qnil
,
5801 doc
: /* Additional space to put between lines when displaying a buffer.
5802 The space is measured in pixels, and put below lines on window systems. */);
5804 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5805 doc
: /* List of functions called with no args to query before killing a buffer. */);
5806 Vkill_buffer_query_functions
= Qnil
;
5808 defsubr (&Sbuffer_live_p
);
5809 defsubr (&Sbuffer_list
);
5810 defsubr (&Sget_buffer
);
5811 defsubr (&Sget_file_buffer
);
5812 defsubr (&Sget_buffer_create
);
5813 defsubr (&Smake_indirect_buffer
);
5814 defsubr (&Sgenerate_new_buffer_name
);
5815 defsubr (&Sbuffer_name
);
5816 /*defsubr (&Sbuffer_number);*/
5817 defsubr (&Sbuffer_file_name
);
5818 defsubr (&Sbuffer_base_buffer
);
5819 defsubr (&Sbuffer_local_value
);
5820 defsubr (&Sbuffer_local_variables
);
5821 defsubr (&Sbuffer_modified_p
);
5822 defsubr (&Sset_buffer_modified_p
);
5823 defsubr (&Sbuffer_modified_tick
);
5824 defsubr (&Srename_buffer
);
5825 defsubr (&Sother_buffer
);
5826 defsubr (&Sbuffer_disable_undo
);
5827 defsubr (&Sbuffer_enable_undo
);
5828 defsubr (&Skill_buffer
);
5829 defsubr (&Sset_buffer_major_mode
);
5830 defsubr (&Sswitch_to_buffer
);
5831 defsubr (&Spop_to_buffer
);
5832 defsubr (&Scurrent_buffer
);
5833 defsubr (&Sset_buffer
);
5834 defsubr (&Sbarf_if_buffer_read_only
);
5835 defsubr (&Sbury_buffer
);
5836 defsubr (&Serase_buffer
);
5837 defsubr (&Sset_buffer_multibyte
);
5838 defsubr (&Skill_all_local_variables
);
5840 defsubr (&Soverlayp
);
5841 defsubr (&Smake_overlay
);
5842 defsubr (&Sdelete_overlay
);
5843 defsubr (&Smove_overlay
);
5844 defsubr (&Soverlay_start
);
5845 defsubr (&Soverlay_end
);
5846 defsubr (&Soverlay_buffer
);
5847 defsubr (&Soverlay_properties
);
5848 defsubr (&Soverlays_at
);
5849 defsubr (&Soverlays_in
);
5850 defsubr (&Snext_overlay_change
);
5851 defsubr (&Sprevious_overlay_change
);
5852 defsubr (&Soverlay_recenter
);
5853 defsubr (&Soverlay_lists
);
5854 defsubr (&Soverlay_get
);
5855 defsubr (&Soverlay_put
);
5856 defsubr (&Srestore_buffer_modified_p
);
5862 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5863 initial_define_key (control_x_map
, 'k', "kill-buffer");
5865 /* This must not be in syms_of_buffer, because Qdisabled is not
5866 initialized when that function gets called. */
5867 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);