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
) = NULL
;
419 /* Put this in the alist of all live buffers. */
421 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
423 /* An error in calling the function here (should someone redfine it)
424 can lead to infinite regress until you run out of stack. rms
425 says that's not worth protecting against. */
426 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
427 /* buf is on buffer-alist, so no gcpro. */
428 call1 (Qucs_set_table_for_input
, buf
);
434 /* Return a list of overlays which is a copy of the overlay list
435 LIST, but for buffer B. */
438 copy_overlays (b
, list
)
442 Lisp_Object result
, buffer
;
444 XSETBUFFER (buffer
, b
);
446 for (result
= Qnil
; CONSP (list
); list
= XCDR (list
))
448 Lisp_Object overlay
, start
, end
, old_overlay
;
451 old_overlay
= XCAR (list
);
452 charpos
= marker_position (OVERLAY_START (old_overlay
));
453 start
= Fmake_marker ();
454 Fset_marker (start
, make_number (charpos
), buffer
);
455 XMARKER (start
)->insertion_type
456 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
458 charpos
= marker_position (OVERLAY_END (old_overlay
));
459 end
= Fmake_marker ();
460 Fset_marker (end
, make_number (charpos
), buffer
);
461 XMARKER (end
)->insertion_type
462 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
464 overlay
= allocate_misc ();
465 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
466 OVERLAY_START (overlay
) = start
;
467 OVERLAY_END (overlay
) = end
;
468 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
470 result
= Fcons (overlay
, result
);
473 return Fnreverse (result
);
477 /* Clone per-buffer values of buffer FROM.
479 Buffer TO gets the same per-buffer values as FROM, with the
480 following exceptions: (1) TO's name is left untouched, (2) markers
481 are copied and made to refer to TO, and (3) overlay lists are
485 clone_per_buffer_values (from
, to
)
486 struct buffer
*from
, *to
;
488 Lisp_Object to_buffer
;
491 XSETBUFFER (to_buffer
, to
);
493 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
495 offset
+= sizeof (Lisp_Object
))
499 obj
= PER_BUFFER_VALUE (from
, offset
);
502 struct Lisp_Marker
*m
= XMARKER (obj
);
503 obj
= Fmake_marker ();
504 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
505 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
508 PER_BUFFER_VALUE (to
, offset
) = obj
;
511 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
513 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
514 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
518 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
520 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
521 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
522 BASE-BUFFER should be an existing buffer (or buffer name).
523 NAME should be a string which is not the name of an existing buffer.
524 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
525 such as major and minor modes, in the indirect buffer.
526 CLONE nil means the indirect buffer's state is reset to default values. */)
527 (base_buffer
, name
, clone
)
528 Lisp_Object base_buffer
, name
, clone
;
533 buf
= Fget_buffer (name
);
535 error ("Buffer name `%s' is in use", SDATA (name
));
537 base_buffer
= Fget_buffer (base_buffer
);
538 if (NILP (base_buffer
))
539 error ("No such buffer: `%s'", SDATA (name
));
541 if (SCHARS (name
) == 0)
542 error ("Empty string for buffer name is not allowed");
544 b
= (struct buffer
*) allocate_buffer ();
545 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
547 if (XBUFFER (base_buffer
)->base_buffer
)
548 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
550 b
->base_buffer
= XBUFFER (base_buffer
);
552 /* Use the base buffer's text object. */
553 b
->text
= b
->base_buffer
->text
;
555 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
556 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
557 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
558 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
559 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
560 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
562 b
->newline_cache
= 0;
563 b
->width_run_cache
= 0;
564 b
->width_table
= Qnil
;
566 /* Put this on the chain of all buffers including killed ones. */
567 b
->next
= all_buffers
;
570 name
= Fcopy_sequence (name
);
571 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
575 reset_buffer_local_variables (b
, 1);
577 /* Put this in the alist of all live buffers. */
579 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
581 b
->mark
= Fmake_marker ();
584 /* The multibyte status belongs to the base buffer. */
585 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
587 /* Make sure the base buffer has markers for its narrowing. */
588 if (NILP (b
->base_buffer
->pt_marker
))
590 b
->base_buffer
->pt_marker
= Fmake_marker ();
591 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
592 BUF_PT (b
->base_buffer
),
593 BUF_PT_BYTE (b
->base_buffer
));
595 if (NILP (b
->base_buffer
->begv_marker
))
597 b
->base_buffer
->begv_marker
= Fmake_marker ();
598 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
599 BUF_BEGV (b
->base_buffer
),
600 BUF_BEGV_BYTE (b
->base_buffer
));
602 if (NILP (b
->base_buffer
->zv_marker
))
604 b
->base_buffer
->zv_marker
= Fmake_marker ();
605 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
606 BUF_ZV (b
->base_buffer
),
607 BUF_ZV_BYTE (b
->base_buffer
));
608 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
613 /* Give the indirect buffer markers for its narrowing. */
614 b
->pt_marker
= Fmake_marker ();
615 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
616 b
->begv_marker
= Fmake_marker ();
617 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
618 b
->zv_marker
= Fmake_marker ();
619 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
620 XMARKER (b
->zv_marker
)->insertion_type
= 1;
623 clone_per_buffer_values (b
->base_buffer
, b
);
628 /* Reinitialize everything about a buffer except its name and contents
629 and local variables. */
633 register struct buffer
*b
;
636 b
->file_truename
= Qnil
;
637 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
639 XSETFASTINT (b
->save_length
, 0);
640 b
->last_window_start
= 1;
641 /* It is more conservative to start out "changed" than "unchanged". */
643 b
->prevent_redisplay_optimizations_p
= 1;
645 b
->auto_save_modified
= 0;
646 b
->auto_save_failure_time
= -1;
647 b
->auto_save_file_name
= Qnil
;
649 b
->overlays_before
= Qnil
;
650 b
->overlays_after
= Qnil
;
651 XSETFASTINT (b
->overlay_center
, 1);
652 b
->mark_active
= Qnil
;
653 b
->point_before_scroll
= Qnil
;
654 b
->file_format
= Qnil
;
655 b
->last_selected_window
= Qnil
;
656 XSETINT (b
->display_count
, 0);
657 b
->display_time
= Qnil
;
658 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
659 b
->cursor_type
= buffer_defaults
.cursor_type
;
660 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
662 b
->display_error_modiff
= 0;
665 /* Reset buffer B's local variables info.
666 Don't use this on a buffer that has already been in use;
667 it does not treat permanent locals consistently.
668 Instead, use Fkill_all_local_variables.
670 If PERMANENT_TOO is 1, then we reset permanent built-in
671 buffer-local variables. If PERMANENT_TOO is 0,
672 we preserve those. */
675 reset_buffer_local_variables (b
, permanent_too
)
676 register struct buffer
*b
;
682 /* Reset the major mode to Fundamental, together with all the
683 things that depend on the major mode.
684 default-major-mode is handled at a higher level.
685 We ignore it here. */
686 b
->major_mode
= Qfundamental_mode
;
688 b
->mode_name
= QSFundamental
;
689 b
->minor_modes
= Qnil
;
691 /* If the standard case table has been altered and invalidated,
692 fix up its insides first. */
693 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
694 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
695 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
696 Fset_standard_case_table (Vascii_downcase_table
);
698 b
->downcase_table
= Vascii_downcase_table
;
699 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
700 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
701 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
702 b
->invisibility_spec
= Qt
;
704 b
->buffer_file_type
= Qnil
;
707 /* Reset all (or most) per-buffer variables to their defaults. */
708 b
->local_var_alist
= Qnil
;
709 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
710 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
711 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
713 /* For each slot that has a default value,
714 copy that into the slot. */
716 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
718 offset
+= sizeof (Lisp_Object
))
720 int idx
= PER_BUFFER_IDX (offset
);
723 || buffer_permanent_local_flags
[idx
] == 0))
724 /* Is -2 used anywhere? */
726 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
730 /* We split this away from generate-new-buffer, because rename-buffer
731 and set-visited-file-name ought to be able to use this to really
732 rename the buffer properly. */
734 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
736 doc
: /* Return a string that is the name of no existing buffer based on NAME.
737 If there is no live buffer named NAME, then return NAME.
738 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
739 until an unused name is found, and then return that name.
740 Optional second argument IGNORE specifies a name that is okay to use
741 \(if it is in the sequence to be tried)
742 even if a buffer with that name exists. */)
744 register Lisp_Object name
, ignore
;
746 register Lisp_Object gentemp
, tem
;
752 tem
= Fget_buffer (name
);
759 sprintf (number
, "<%d>", ++count
);
760 gentemp
= concat2 (name
, build_string (number
));
761 tem
= Fstring_equal (gentemp
, ignore
);
764 tem
= Fget_buffer (gentemp
);
771 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
772 doc
: /* Return the name of BUFFER, as a string.
773 With no argument or nil as argument, return the name of the current buffer. */)
775 register Lisp_Object buffer
;
778 return current_buffer
->name
;
779 CHECK_BUFFER (buffer
);
780 return XBUFFER (buffer
)->name
;
783 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
784 doc
: /* Return name of file BUFFER is visiting, or nil if none.
785 No argument or nil as argument means use the current buffer. */)
787 register Lisp_Object buffer
;
790 return current_buffer
->filename
;
791 CHECK_BUFFER (buffer
);
792 return XBUFFER (buffer
)->filename
;
795 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
797 doc
: /* Return the base buffer of indirect buffer BUFFER.
798 If BUFFER is not indirect, return nil. */)
800 register Lisp_Object buffer
;
803 Lisp_Object base_buffer
;
806 base
= current_buffer
->base_buffer
;
809 CHECK_BUFFER (buffer
);
810 base
= XBUFFER (buffer
)->base_buffer
;
815 XSETBUFFER (base_buffer
, base
);
819 DEFUN ("buffer-local-value", Fbuffer_local_value
,
820 Sbuffer_local_value
, 2, 2, 0,
821 doc
: /* Return the value of VARIABLE in BUFFER.
822 If VARIABLE does not have a buffer-local binding in BUFFER, the value
823 is the default binding of variable. */)
825 register Lisp_Object symbol
;
826 register Lisp_Object buffer
;
828 register struct buffer
*buf
;
829 register Lisp_Object result
;
831 CHECK_SYMBOL (symbol
);
832 CHECK_BUFFER (buffer
);
833 buf
= XBUFFER (buffer
);
835 /* Look in local_var_list */
836 result
= Fassoc (symbol
, buf
->local_var_alist
);
842 /* Look in special slots */
843 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
844 offset
< sizeof (struct buffer
);
845 /* sizeof EMACS_INT == sizeof Lisp_Object */
846 offset
+= (sizeof (EMACS_INT
)))
848 idx
= PER_BUFFER_IDX (offset
);
849 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
850 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
851 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
853 result
= PER_BUFFER_VALUE (buf
, offset
);
860 result
= Fdefault_value (symbol
);
864 Lisp_Object valcontents
;
865 Lisp_Object current_alist_element
;
867 /* What binding is loaded right now? */
868 valcontents
= SYMBOL_VALUE (symbol
);
869 current_alist_element
870 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
872 /* The value of the currently loaded binding is not
873 stored in it, but rather in the realvalue slot.
874 Store that value into the binding it belongs to
875 in case that is the one we are about to use. */
877 Fsetcdr (current_alist_element
,
878 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
880 /* Now get the (perhaps updated) value out of the binding. */
881 result
= XCDR (result
);
884 if (EQ (result
, Qunbound
))
885 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
890 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
891 Sbuffer_local_variables
, 0, 1, 0,
892 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
893 Most elements look like (SYMBOL . VALUE), describing one variable.
894 For a symbol that is locally unbound, just the symbol appears in the value.
895 Note that storing new VALUEs in these elements doesn't change the variables.
896 No argument or nil as argument means use current buffer as BUFFER. */)
898 register Lisp_Object buffer
;
900 register struct buffer
*buf
;
901 register Lisp_Object result
;
904 buf
= current_buffer
;
907 CHECK_BUFFER (buffer
);
908 buf
= XBUFFER (buffer
);
914 register Lisp_Object tail
;
915 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
917 Lisp_Object val
, elt
;
921 /* Reference each variable in the alist in buf.
922 If inquiring about the current buffer, this gets the current values,
923 so store them into the alist so the alist is up to date.
924 If inquiring about some other buffer, this swaps out any values
925 for that buffer, making the alist up to date automatically. */
926 val
= find_symbol_value (XCAR (elt
));
927 /* Use the current buffer value only if buf is the current buffer. */
928 if (buf
!= current_buffer
)
931 /* If symbol is unbound, put just the symbol in the list. */
932 if (EQ (val
, Qunbound
))
933 result
= Fcons (XCAR (elt
), result
);
934 /* Otherwise, put (symbol . value) in the list. */
936 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
940 /* Add on all the variables stored in special slots. */
944 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
945 offset
< sizeof (struct buffer
);
946 /* sizeof EMACS_INT == sizeof Lisp_Object */
947 offset
+= (sizeof (EMACS_INT
)))
949 idx
= PER_BUFFER_IDX (offset
);
950 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
951 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
952 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
953 PER_BUFFER_VALUE (buf
, offset
)),
962 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
964 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
965 No argument or nil as argument means use current buffer as BUFFER. */)
967 register Lisp_Object buffer
;
969 register struct buffer
*buf
;
971 buf
= current_buffer
;
974 CHECK_BUFFER (buffer
);
975 buf
= XBUFFER (buffer
);
978 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
981 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
983 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
984 A non-nil FLAG means mark the buffer modified. */)
986 register Lisp_Object flag
;
988 register int already
;
989 register Lisp_Object fn
;
990 Lisp_Object buffer
, window
;
992 #ifdef CLASH_DETECTION
993 /* If buffer becoming modified, lock the file.
994 If buffer becoming unmodified, unlock the file. */
996 fn
= current_buffer
->file_truename
;
997 /* Test buffer-file-name so that binding it to nil is effective. */
998 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1000 already
= SAVE_MODIFF
< MODIFF
;
1001 if (!already
&& !NILP (flag
))
1003 else if (already
&& NILP (flag
))
1006 #endif /* CLASH_DETECTION */
1008 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1010 /* Set update_mode_lines only if buffer is displayed in some window.
1011 Packages like jit-lock or lazy-lock preserve a buffer's modified
1012 state by recording/restoring the state around blocks of code.
1013 Setting update_mode_lines makes redisplay consider all windows
1014 (on all frames). Stealth fontification of buffers not displayed
1015 would incur additional redisplay costs if we'd set
1016 update_modes_lines unconditionally.
1018 Ideally, I think there should be another mechanism for fontifying
1019 buffers without "modifying" buffers, or redisplay should be
1020 smarter about updating the `*' in mode lines. --gerd */
1021 XSETBUFFER (buffer
, current_buffer
);
1022 window
= Fget_buffer_window (buffer
, Qt
);
1023 if (WINDOWP (window
))
1025 ++update_mode_lines
;
1026 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1032 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1033 Srestore_buffer_modified_p
, 1, 1, 0,
1034 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
1035 It is not ensured that mode lines will be updated to show the modified
1036 state of the current buffer. Use with care. */)
1040 #ifdef CLASH_DETECTION
1043 /* If buffer becoming modified, lock the file.
1044 If buffer becoming unmodified, unlock the file. */
1046 fn
= current_buffer
->file_truename
;
1047 /* Test buffer-file-name so that binding it to nil is effective. */
1048 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1050 int already
= SAVE_MODIFF
< MODIFF
;
1051 if (!already
&& !NILP (flag
))
1053 else if (already
&& NILP (flag
))
1056 #endif /* CLASH_DETECTION */
1058 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1062 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1064 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1065 Each buffer has a tick counter which is incremented each time the text in
1066 that buffer is changed. It wraps around occasionally.
1067 No argument or nil as argument means use current buffer as BUFFER. */)
1069 register Lisp_Object buffer
;
1071 register struct buffer
*buf
;
1073 buf
= current_buffer
;
1076 CHECK_BUFFER (buffer
);
1077 buf
= XBUFFER (buffer
);
1080 return make_number (BUF_MODIFF (buf
));
1083 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1084 "sRename buffer (to new name): \nP",
1085 doc
: /* Change current buffer's name to NEWNAME (a string).
1086 If second arg UNIQUE is nil or omitted, it is an error if a
1087 buffer named NEWNAME already exists.
1088 If UNIQUE is non-nil, come up with a new name using
1089 `generate-new-buffer-name'.
1090 Interactively, you can set UNIQUE with a prefix argument.
1091 We return the name we actually gave the buffer.
1092 This does not change the name of the visited file (if any). */)
1094 register Lisp_Object newname
, unique
;
1096 register Lisp_Object tem
, buf
;
1098 CHECK_STRING (newname
);
1100 if (SCHARS (newname
) == 0)
1101 error ("Empty string is invalid as a buffer name");
1103 tem
= Fget_buffer (newname
);
1106 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1107 rename the buffer automatically so you can create another
1108 with the original name. It makes UNIQUE equivalent to
1109 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1110 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1111 return current_buffer
->name
;
1113 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1115 error ("Buffer name `%s' is in use", SDATA (newname
));
1118 current_buffer
->name
= newname
;
1120 /* Catch redisplay's attention. Unless we do this, the mode lines for
1121 any windows displaying current_buffer will stay unchanged. */
1122 update_mode_lines
++;
1124 XSETBUFFER (buf
, current_buffer
);
1125 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1126 if (NILP (current_buffer
->filename
)
1127 && !NILP (current_buffer
->auto_save_file_name
))
1128 call0 (intern ("rename-auto-save-file"));
1129 /* Refetch since that last call may have done GC. */
1130 return current_buffer
->name
;
1133 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1134 doc
: /* Return most recently selected buffer other than BUFFER.
1135 Buffers not visible in windows are preferred to visible buffers,
1136 unless optional second argument VISIBLE-OK is non-nil.
1137 If the optional third argument FRAME is non-nil, use that frame's
1138 buffer list instead of the selected frame's buffer list.
1139 If no other buffer exists, the buffer `*scratch*' is returned.
1140 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1141 (buffer
, visible_ok
, frame
)
1142 register Lisp_Object buffer
, visible_ok
, frame
;
1144 Lisp_Object
Fset_buffer_major_mode ();
1145 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1149 frame
= selected_frame
;
1151 tail
= Vbuffer_alist
;
1152 pred
= frame_buffer_predicate (frame
);
1154 /* Consider buffers that have been seen in the selected frame
1155 before other buffers. */
1157 tem
= frame_buffer_list (frame
);
1161 if (BUFFERP (XCAR (tem
)))
1162 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1165 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1167 for (; CONSP (tail
); tail
= XCDR (tail
))
1169 buf
= Fcdr (XCAR (tail
));
1170 if (EQ (buf
, buffer
))
1172 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1174 /* If the selected frame has a buffer_predicate,
1175 disregard buffers that don't fit the predicate. */
1178 tem
= call1 (pred
, buf
);
1183 if (NILP (visible_ok
))
1184 tem
= Fget_buffer_window (buf
, Qvisible
);
1189 if (NILP (notsogood
))
1192 if (!NILP (notsogood
))
1194 buf
= Fget_buffer (build_string ("*scratch*"));
1197 buf
= Fget_buffer_create (build_string ("*scratch*"));
1198 Fset_buffer_major_mode (buf
);
1203 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1205 doc
: /* Make BUFFER stop keeping undo information.
1206 No argument or nil as argument means do this for the current buffer. */)
1208 register Lisp_Object buffer
;
1210 Lisp_Object real_buffer
;
1213 XSETBUFFER (real_buffer
, current_buffer
);
1216 real_buffer
= Fget_buffer (buffer
);
1217 if (NILP (real_buffer
))
1221 XBUFFER (real_buffer
)->undo_list
= Qt
;
1226 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1228 doc
: /* Start keeping undo information for buffer BUFFER.
1229 No argument or nil as argument means do this for the current buffer. */)
1231 register Lisp_Object buffer
;
1233 Lisp_Object real_buffer
;
1236 XSETBUFFER (real_buffer
, current_buffer
);
1239 real_buffer
= Fget_buffer (buffer
);
1240 if (NILP (real_buffer
))
1244 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1245 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1251 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1252 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1253 The buffer being killed will be current while the hook is running.\n\
1256 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1257 doc
: /* Kill the buffer BUFFER.
1258 The argument may be a buffer or may be the name of a buffer.
1259 An argument of nil means kill the current buffer.
1261 Value is t if the buffer is actually killed, nil if user says no.
1263 The value of `kill-buffer-hook' (which may be local to that buffer),
1264 if not void, is a list of functions to be called, with no arguments,
1265 before the buffer is actually killed. The buffer to be killed is current
1266 when the hook functions are called.
1268 Any processes that have this buffer as the `process-buffer' are killed
1274 register struct buffer
*b
;
1275 register Lisp_Object tem
;
1276 register struct Lisp_Marker
*m
;
1277 struct gcpro gcpro1
;
1280 buf
= Fcurrent_buffer ();
1282 buf
= Fget_buffer (buffer
);
1288 /* Avoid trouble for buffer already dead. */
1292 /* Query if the buffer is still modified. */
1293 if (INTERACTIVE
&& !NILP (b
->filename
)
1294 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1297 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1298 b
->name
, make_number (0)));
1304 /* Run hooks with the buffer to be killed the current buffer. */
1306 int count
= SPECPDL_INDEX ();
1307 Lisp_Object arglist
[1];
1309 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1310 set_buffer_internal (b
);
1312 /* First run the query functions; if any query is answered no,
1313 don't kill the buffer. */
1314 arglist
[0] = Qkill_buffer_query_functions
;
1315 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1316 return unbind_to (count
, Qnil
);
1318 /* Then run the hooks. */
1319 Frun_hooks (1, &Qkill_buffer_hook
);
1320 unbind_to (count
, Qnil
);
1323 /* We have no more questions to ask. Verify that it is valid
1324 to kill the buffer. This must be done after the questions
1325 since anything can happen within do_yes_or_no_p. */
1327 /* Don't kill the minibuffer now current. */
1328 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1334 /* When we kill a base buffer, kill all its indirect buffers.
1335 We do it at this stage so nothing terrible happens if they
1336 ask questions or their hooks get errors. */
1337 if (! b
->base_buffer
)
1339 struct buffer
*other
;
1343 for (other
= all_buffers
; other
; other
= other
->next
)
1344 /* all_buffers contains dead buffers too;
1345 don't re-kill them. */
1346 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1349 XSETBUFFER (buf
, other
);
1356 /* Make this buffer not be current.
1357 In the process, notice if this is the sole visible buffer
1358 and give up if so. */
1359 if (b
== current_buffer
)
1361 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1363 if (b
== current_buffer
)
1367 /* Notice if the buffer to kill is the sole visible buffer
1368 when we're currently in the mini-buffer, and give up if so. */
1369 XSETBUFFER (tem
, current_buffer
);
1370 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1372 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1377 /* Now there is no question: we can kill the buffer. */
1379 #ifdef CLASH_DETECTION
1380 /* Unlock this buffer's file, if it is locked. */
1382 #endif /* CLASH_DETECTION */
1384 kill_buffer_processes (buf
);
1385 clear_charpos_cache (b
);
1387 tem
= Vinhibit_quit
;
1389 replace_buffer_in_all_windows (buf
);
1390 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1391 frames_discard_buffer (buf
);
1392 Vinhibit_quit
= tem
;
1394 /* Delete any auto-save file, if we saved it in this session.
1395 But not if the buffer is modified. */
1396 if (STRINGP (b
->auto_save_file_name
)
1397 && b
->auto_save_modified
!= 0
1398 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1399 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
))
1402 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1404 internal_delete_file (b
->auto_save_file_name
);
1409 /* Unchain all markers that belong to this indirect buffer.
1410 Don't unchain the markers that belong to the base buffer
1411 or its other indirect buffers. */
1412 for (m
= BUF_MARKERS (b
); m
; )
1414 struct Lisp_Marker
*next
= m
->next
;
1422 /* Unchain all markers of this buffer and its indirect buffers.
1423 and leave them pointing nowhere. */
1424 for (m
= BUF_MARKERS (b
); m
; )
1426 struct Lisp_Marker
*next
= m
->next
;
1431 BUF_MARKERS (b
) = NULL
;
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
; CONSP (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
; CONSP (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 struct Lisp_Marker
*tail
, *markers
;
2049 struct buffer
*other
;
2050 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
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
);
2071 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2073 begv
= BEGV
, zv
= ZV
;
2083 /* Do this first, so it can use CHAR_TO_BYTE
2084 to calculate the old correspondences. */
2085 set_intervals_multibyte (0);
2087 current_buffer
->enable_multibyte_characters
= Qnil
;
2093 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2096 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2097 tail
->charpos
= tail
->bytepos
;
2099 /* Convert multibyte form of 8-bit characters to unibyte. */
2114 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2115 p
+= bytes
, pos
+= bytes
;
2118 c
= STRING_CHAR (p
, stop
- pos
);
2119 /* Delete all bytes for this 8-bit character but the
2120 last one, and change the last one to the charcter
2123 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2135 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2143 /* Be sure not to have a multibyte sequence striding over the GAP.
2144 Ex: We change this: "...abc\201 _GAP_ \241def..."
2145 to: "...abc _GAP_ \201\241def..." */
2147 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2148 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2150 unsigned char *p
= GPT_ADDR
- 1;
2152 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2153 if (BASE_LEADING_CODE_P (*p
))
2155 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2157 move_gap_both (new_gpt
, new_gpt
);
2161 /* Make the buffer contents valid as multibyte by converting
2162 8-bit characters to multibyte form. */
2178 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2179 p
+= bytes
, pos
+= bytes
;
2182 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2184 bytes
= CHAR_STRING (*p
, tmp
);
2186 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2188 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2189 /* Now the gap is after the just inserted data. */
2206 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2208 /* Do this first, so that chars_in_text asks the right question.
2209 set_intervals_multibyte needs it too. */
2210 current_buffer
->enable_multibyte_characters
= Qt
;
2212 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2213 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2215 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2217 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2218 if (BEGV_BYTE
> GPT_BYTE
)
2219 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2221 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2223 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2224 if (ZV_BYTE
> GPT_BYTE
)
2225 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2227 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2230 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2233 if (pt_byte
> GPT_BYTE
)
2234 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2236 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2237 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2240 tail
= markers
= BUF_MARKERS (current_buffer
);
2242 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2243 getting confused by the markers that have not yet been updated.
2244 It is also a signal that it should never create a marker. */
2245 BUF_MARKERS (current_buffer
) = NULL
;
2247 for (; tail
; tail
= tail
->next
)
2249 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2250 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2253 /* Make sure no markers were put on the chain
2254 while the chain value was incorrect. */
2255 if (BUF_MARKERS (current_buffer
))
2258 BUF_MARKERS (current_buffer
) = markers
;
2260 /* Do this last, so it can calculate the new correspondences
2261 between chars and bytes. */
2262 set_intervals_multibyte (1);
2266 current_buffer
->undo_list
= Qnil
;
2268 /* Changing the multibyteness of a buffer means that all windows
2269 showing that buffer must be updated thoroughly. */
2270 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2271 ++windows_or_buffers_changed
;
2273 /* Copy this buffer's new multibyte status
2274 into all of its indirect buffers. */
2275 for (other
= all_buffers
; other
; other
= other
->next
)
2276 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2278 other
->enable_multibyte_characters
2279 = current_buffer
->enable_multibyte_characters
;
2280 other
->prevent_redisplay_optimizations_p
= 1;
2283 /* Restore the modifiedness of the buffer. */
2284 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2285 Fset_buffer_modified_p (Qnil
);
2288 /* Update coding systems of this buffer's process (if any). */
2290 Lisp_Object process
;
2292 process
= Fget_buffer_process (Fcurrent_buffer ());
2293 if (PROCESSP (process
))
2294 setup_process_coding_systems (process
);
2296 #endif /* subprocesses */
2301 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2303 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2304 Most local variable bindings are eliminated so that the default values
2305 become effective once more. Also, the syntax table is set from
2306 `standard-syntax-table', the local keymap is set to nil,
2307 and the abbrev table from `fundamental-mode-abbrev-table'.
2308 This function also forces redisplay of the mode line.
2310 Every function to select a new major mode starts by
2311 calling this function.
2313 As a special exception, local variables whose names have
2314 a non-nil `permanent-local' property are not eliminated by this function.
2316 The first thing this function does is run
2317 the normal hook `change-major-mode-hook'. */)
2320 register Lisp_Object alist
, sym
, tem
;
2323 if (!NILP (Vrun_hooks
))
2324 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2325 oalist
= current_buffer
->local_var_alist
;
2327 /* Make sure none of the bindings in oalist
2328 remain swapped in, in their symbols. */
2330 swap_out_buffer_local_variables (current_buffer
);
2332 /* Actually eliminate all local bindings of this buffer. */
2334 reset_buffer_local_variables (current_buffer
, 0);
2336 /* Any which are supposed to be permanent,
2337 make local again, with the same values they had. */
2339 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2341 sym
= XCAR (XCAR (alist
));
2342 tem
= Fget (sym
, Qpermanent_local
);
2345 Fmake_local_variable (sym
);
2346 Fset (sym
, XCDR (XCAR (alist
)));
2350 /* Force mode-line redisplay. Useful here because all major mode
2351 commands call this function. */
2352 update_mode_lines
++;
2357 /* Make sure no local variables remain set up with buffer B
2358 for their current values. */
2361 swap_out_buffer_local_variables (b
)
2364 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2366 XSETBUFFER (buffer
, b
);
2367 oalist
= b
->local_var_alist
;
2369 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2371 sym
= XCAR (XCAR (alist
));
2373 /* Need not do anything if some other buffer's binding is now encached. */
2374 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2375 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2377 /* Symbol is set up for this buffer's old local value.
2378 Set it up for the current buffer with the default value. */
2380 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2381 /* Store the symbol's current value into the alist entry
2382 it is currently set up for. This is so that, if the
2383 local is marked permanent, and we make it local again
2384 later in Fkill_all_local_variables, we don't lose the value. */
2385 XSETCDR (XCAR (tem
),
2386 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2387 /* Switch to the symbol's default-value alist entry. */
2389 /* Mark it as current for buffer B. */
2390 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2391 /* Store the current value into any forwarding in the symbol. */
2392 store_symval_forwarding (sym
,
2393 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2399 /* Find all the overlays in the current buffer that contain position POS.
2400 Return the number found, and store them in a vector in *VEC_PTR.
2401 Store in *LEN_PTR the size allocated for the vector.
2402 Store in *NEXT_PTR the next position after POS where an overlay starts,
2403 or ZV if there are no more overlays.
2404 Store in *PREV_PTR the previous position before POS where an overlay ends,
2405 or where an overlay starts which ends at or after POS;
2406 or BEGV if there are no such overlays.
2407 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2409 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2410 when this function is called.
2412 If EXTEND is non-zero, we make the vector bigger if necessary.
2413 If EXTEND is zero, we never extend the vector,
2414 and we store only as many overlays as will fit.
2415 But we still return the total number of overlays.
2417 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2418 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2419 default (BEGV or ZV). */
2422 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2425 Lisp_Object
**vec_ptr
;
2431 Lisp_Object tail
, overlay
, start
, end
;
2434 Lisp_Object
*vec
= *vec_ptr
;
2437 int inhibit_storing
= 0;
2439 for (tail
= current_buffer
->overlays_before
;
2443 int startpos
, endpos
;
2445 overlay
= XCAR (tail
);
2447 start
= OVERLAY_START (overlay
);
2448 end
= OVERLAY_END (overlay
);
2449 endpos
= OVERLAY_POSITION (end
);
2456 startpos
= OVERLAY_POSITION (start
);
2457 /* This one ends at or after POS
2458 so its start counts for PREV_PTR if it's before POS. */
2459 if (prev
< startpos
&& startpos
< pos
)
2463 if (startpos
<= pos
)
2467 /* The supplied vector is full.
2468 Either make it bigger, or don't store any more in it. */
2471 /* Make it work with an initial len == 0. */
2476 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2480 inhibit_storing
= 1;
2483 if (!inhibit_storing
)
2485 /* Keep counting overlays even if we can't return them all. */
2488 else if (startpos
< next
)
2492 for (tail
= current_buffer
->overlays_after
;
2496 int startpos
, endpos
;
2498 overlay
= XCAR (tail
);
2500 start
= OVERLAY_START (overlay
);
2501 end
= OVERLAY_END (overlay
);
2502 startpos
= OVERLAY_POSITION (start
);
2505 if (startpos
< next
)
2509 endpos
= OVERLAY_POSITION (end
);
2516 /* Make it work with an initial len == 0. */
2521 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2525 inhibit_storing
= 1;
2528 if (!inhibit_storing
)
2532 if (startpos
< pos
&& startpos
> prev
)
2535 else if (endpos
< pos
&& endpos
> prev
)
2537 else if (endpos
== pos
&& startpos
> prev
2538 && (!change_req
|| startpos
< pos
))
2549 /* Find all the overlays in the current buffer that overlap the range BEG-END
2550 or are empty at BEG.
2552 Return the number found, and store them in a vector in *VEC_PTR.
2553 Store in *LEN_PTR the size allocated for the vector.
2554 Store in *NEXT_PTR the next position after POS where an overlay starts,
2555 or ZV if there are no more overlays.
2556 Store in *PREV_PTR the previous position before POS where an overlay ends,
2557 or BEGV if there are no previous overlays.
2558 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2560 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2561 when this function is called.
2563 If EXTEND is non-zero, we make the vector bigger if necessary.
2564 If EXTEND is zero, we never extend the vector,
2565 and we store only as many overlays as will fit.
2566 But we still return the total number of overlays. */
2569 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2572 Lisp_Object
**vec_ptr
;
2577 Lisp_Object tail
, overlay
, ostart
, oend
;
2580 Lisp_Object
*vec
= *vec_ptr
;
2583 int inhibit_storing
= 0;
2585 for (tail
= current_buffer
->overlays_before
;
2589 int startpos
, endpos
;
2591 overlay
= XCAR (tail
);
2593 ostart
= OVERLAY_START (overlay
);
2594 oend
= OVERLAY_END (overlay
);
2595 endpos
= OVERLAY_POSITION (oend
);
2602 startpos
= OVERLAY_POSITION (ostart
);
2603 /* Count an interval if it either overlaps the range
2604 or is empty at the start of the range. */
2605 if ((beg
< endpos
&& startpos
< end
)
2606 || (startpos
== endpos
&& beg
== endpos
))
2610 /* The supplied vector is full.
2611 Either make it bigger, or don't store any more in it. */
2614 /* Make it work with an initial len == 0. */
2619 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2623 inhibit_storing
= 1;
2626 if (!inhibit_storing
)
2628 /* Keep counting overlays even if we can't return them all. */
2631 else if (startpos
< next
)
2635 for (tail
= current_buffer
->overlays_after
;
2639 int startpos
, endpos
;
2641 overlay
= XCAR (tail
);
2643 ostart
= OVERLAY_START (overlay
);
2644 oend
= OVERLAY_END (overlay
);
2645 startpos
= OVERLAY_POSITION (ostart
);
2648 if (startpos
< next
)
2652 endpos
= OVERLAY_POSITION (oend
);
2653 /* Count an interval if it either overlaps the range
2654 or is empty at the start of the range. */
2655 if ((beg
< endpos
&& startpos
< end
)
2656 || (startpos
== endpos
&& beg
== endpos
))
2662 /* Make it work with an initial len == 0. */
2667 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2671 inhibit_storing
= 1;
2674 if (!inhibit_storing
)
2678 else if (endpos
< beg
&& endpos
> prev
)
2690 /* Return non-zero if there exists an overlay with a non-nil
2691 `mouse-face' property overlapping OVERLAY. */
2694 mouse_face_overlay_overlaps (overlay
)
2695 Lisp_Object overlay
;
2697 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2698 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2700 Lisp_Object
*v
, tem
;
2703 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2704 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2707 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2708 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2711 for (i
= 0; i
< n
; ++i
)
2712 if (!EQ (v
[i
], overlay
)
2713 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2722 /* Fast function to just test if we're at an overlay boundary. */
2724 overlay_touches_p (pos
)
2727 Lisp_Object tail
, overlay
;
2729 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2734 overlay
= XCAR (tail
);
2735 if (!GC_OVERLAYP (overlay
))
2738 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2741 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2745 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2750 overlay
= XCAR (tail
);
2751 if (!GC_OVERLAYP (overlay
))
2754 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2757 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2765 Lisp_Object overlay
;
2771 compare_overlays (v1
, v2
)
2772 const void *v1
, *v2
;
2774 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2775 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2776 if (s1
->priority
!= s2
->priority
)
2777 return s1
->priority
- s2
->priority
;
2778 if (s1
->beg
!= s2
->beg
)
2779 return s1
->beg
- s2
->beg
;
2780 if (s1
->end
!= s2
->end
)
2781 return s2
->end
- s1
->end
;
2785 /* Sort an array of overlays by priority. The array is modified in place.
2786 The return value is the new size; this may be smaller than the original
2787 size if some of the overlays were invalid or were window-specific. */
2789 sort_overlays (overlay_vec
, noverlays
, w
)
2790 Lisp_Object
*overlay_vec
;
2795 struct sortvec
*sortvec
;
2796 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2798 /* Put the valid and relevant overlays into sortvec. */
2800 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2803 Lisp_Object overlay
;
2805 overlay
= overlay_vec
[i
];
2806 if (OVERLAY_VALID (overlay
)
2807 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2808 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2810 /* If we're interested in a specific window, then ignore
2811 overlays that are limited to some other window. */
2816 window
= Foverlay_get (overlay
, Qwindow
);
2817 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2821 /* This overlay is good and counts: put it into sortvec. */
2822 sortvec
[j
].overlay
= overlay
;
2823 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2824 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2825 tem
= Foverlay_get (overlay
, Qpriority
);
2827 sortvec
[j
].priority
= XINT (tem
);
2829 sortvec
[j
].priority
= 0;
2835 /* Sort the overlays into the proper order: increasing priority. */
2838 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2840 for (i
= 0; i
< noverlays
; i
++)
2841 overlay_vec
[i
] = sortvec
[i
].overlay
;
2847 Lisp_Object string
, string2
;
2854 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2855 int size
; /* Allocated length of that array. */
2856 int used
; /* How much of the array is currently in use. */
2857 int bytes
; /* Total length of the strings in buf. */
2860 /* Buffers for storing information about the overlays touching a given
2861 position. These could be automatic variables in overlay_strings, but
2862 it's more efficient to hold onto the memory instead of repeatedly
2863 allocating and freeing it. */
2864 static struct sortstrlist overlay_heads
, overlay_tails
;
2865 static unsigned char *overlay_str_buf
;
2867 /* Allocated length of overlay_str_buf. */
2868 static int overlay_str_len
;
2870 /* A comparison function suitable for passing to qsort. */
2872 cmp_for_strings (as1
, as2
)
2875 struct sortstr
*s1
= (struct sortstr
*)as1
;
2876 struct sortstr
*s2
= (struct sortstr
*)as2
;
2877 if (s1
->size
!= s2
->size
)
2878 return s2
->size
- s1
->size
;
2879 if (s1
->priority
!= s2
->priority
)
2880 return s1
->priority
- s2
->priority
;
2885 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2886 struct sortstrlist
*ssl
;
2887 Lisp_Object str
, str2
, pri
;
2892 if (ssl
->used
== ssl
->size
)
2898 ssl
->buf
= ((struct sortstr
*)
2899 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2901 ssl
->buf
[ssl
->used
].string
= str
;
2902 ssl
->buf
[ssl
->used
].string2
= str2
;
2903 ssl
->buf
[ssl
->used
].size
= size
;
2904 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2907 if (NILP (current_buffer
->enable_multibyte_characters
))
2908 nbytes
= SCHARS (str
);
2909 else if (! STRING_MULTIBYTE (str
))
2910 nbytes
= count_size_as_multibyte (SDATA (str
),
2913 nbytes
= SBYTES (str
);
2915 ssl
->bytes
+= nbytes
;
2919 if (NILP (current_buffer
->enable_multibyte_characters
))
2920 nbytes
= SCHARS (str2
);
2921 else if (! STRING_MULTIBYTE (str2
))
2922 nbytes
= count_size_as_multibyte (SDATA (str2
),
2925 nbytes
= SBYTES (str2
);
2927 ssl
->bytes
+= nbytes
;
2931 /* Return the concatenation of the strings associated with overlays that
2932 begin or end at POS, ignoring overlays that are specific to a window
2933 other than W. The strings are concatenated in the appropriate order:
2934 shorter overlays nest inside longer ones, and higher priority inside
2935 lower. Normally all of the after-strings come first, but zero-sized
2936 overlays have their after-strings ride along with the before-strings
2937 because it would look strange to print them inside-out.
2939 Returns the string length, and stores the contents indirectly through
2940 PSTR, if that variable is non-null. The string may be overwritten by
2941 subsequent calls. */
2944 overlay_strings (pos
, w
, pstr
)
2947 unsigned char **pstr
;
2949 Lisp_Object ov
, overlay
, window
, str
;
2950 int startpos
, endpos
;
2951 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2953 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2954 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2955 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2957 overlay
= XCAR (ov
);
2958 if (!OVERLAYP (overlay
))
2961 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2962 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2965 if (endpos
!= pos
&& startpos
!= pos
)
2967 window
= Foverlay_get (overlay
, Qwindow
);
2968 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2971 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2972 record_overlay_string (&overlay_heads
, str
,
2974 ? Foverlay_get (overlay
, Qafter_string
)
2976 Foverlay_get (overlay
, Qpriority
),
2978 else if (endpos
== pos
2979 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2980 record_overlay_string (&overlay_tails
, str
, Qnil
,
2981 Foverlay_get (overlay
, Qpriority
),
2984 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2986 overlay
= XCAR (ov
);
2987 if (!OVERLAYP (overlay
))
2990 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2991 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2994 if (endpos
!= pos
&& startpos
!= pos
)
2996 window
= Foverlay_get (overlay
, Qwindow
);
2997 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3000 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3001 record_overlay_string (&overlay_heads
, str
,
3003 ? Foverlay_get (overlay
, Qafter_string
)
3005 Foverlay_get (overlay
, Qpriority
),
3007 else if (endpos
== pos
3008 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3009 record_overlay_string (&overlay_tails
, str
, Qnil
,
3010 Foverlay_get (overlay
, Qpriority
),
3013 if (overlay_tails
.used
> 1)
3014 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3016 if (overlay_heads
.used
> 1)
3017 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3019 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3024 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3026 if (total
> overlay_str_len
)
3028 overlay_str_len
= total
;
3029 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3032 p
= overlay_str_buf
;
3033 for (i
= overlay_tails
.used
; --i
>= 0;)
3036 tem
= overlay_tails
.buf
[i
].string
;
3037 nbytes
= copy_text (SDATA (tem
), p
,
3039 STRING_MULTIBYTE (tem
), multibyte
);
3042 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3045 tem
= overlay_heads
.buf
[i
].string
;
3046 nbytes
= copy_text (SDATA (tem
), p
,
3048 STRING_MULTIBYTE (tem
), multibyte
);
3050 tem
= overlay_heads
.buf
[i
].string2
;
3053 nbytes
= copy_text (SDATA (tem
), p
,
3055 STRING_MULTIBYTE (tem
), multibyte
);
3059 if (p
!= overlay_str_buf
+ total
)
3062 *pstr
= overlay_str_buf
;
3068 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3071 recenter_overlay_lists (buf
, pos
)
3075 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
3077 /* See if anything in overlays_before should move to overlays_after. */
3079 /* We don't strictly need prev in this loop; it should always be nil.
3080 But we use it for symmetry and in case that should cease to be true
3081 with some future change. */
3083 for (tail
= buf
->overlays_before
;
3085 prev
= tail
, tail
= next
)
3088 overlay
= XCAR (tail
);
3090 /* If the overlay is not valid, get rid of it. */
3091 if (!OVERLAY_VALID (overlay
))
3096 /* Splice the cons cell TAIL out of overlays_before. */
3100 buf
->overlays_before
= next
;
3106 beg
= OVERLAY_START (overlay
);
3107 end
= OVERLAY_END (overlay
);
3109 if (OVERLAY_POSITION (end
) > pos
)
3111 /* OVERLAY needs to be moved. */
3112 int where
= OVERLAY_POSITION (beg
);
3113 Lisp_Object other
, other_prev
;
3115 /* Splice the cons cell TAIL out of overlays_before. */
3117 XSETCDR (prev
, next
);
3119 buf
->overlays_before
= next
;
3121 /* Search thru overlays_after for where to put it. */
3123 for (other
= buf
->overlays_after
;
3125 other_prev
= other
, other
= XCDR (other
))
3127 Lisp_Object otherbeg
, otheroverlay
;
3129 otheroverlay
= XCAR (other
);
3130 if (! OVERLAY_VALID (otheroverlay
))
3133 otherbeg
= OVERLAY_START (otheroverlay
);
3134 if (OVERLAY_POSITION (otherbeg
) >= where
)
3138 /* Add TAIL to overlays_after before OTHER. */
3139 XSETCDR (tail
, other
);
3140 if (!NILP (other_prev
))
3141 XSETCDR (other_prev
, tail
);
3143 buf
->overlays_after
= tail
;
3147 /* We've reached the things that should stay in overlays_before.
3148 All the rest of overlays_before must end even earlier,
3153 /* See if anything in overlays_after should be in overlays_before. */
3155 for (tail
= buf
->overlays_after
;
3157 prev
= tail
, tail
= next
)
3160 overlay
= XCAR (tail
);
3162 /* If the overlay is not valid, get rid of it. */
3163 if (!OVERLAY_VALID (overlay
))
3168 /* Splice the cons cell TAIL out of overlays_after. */
3172 buf
->overlays_after
= next
;
3178 beg
= OVERLAY_START (overlay
);
3179 end
= OVERLAY_END (overlay
);
3181 /* Stop looking, when we know that nothing further
3182 can possibly end before POS. */
3183 if (OVERLAY_POSITION (beg
) > pos
)
3186 if (OVERLAY_POSITION (end
) <= pos
)
3188 /* OVERLAY needs to be moved. */
3189 int where
= OVERLAY_POSITION (end
);
3190 Lisp_Object other
, other_prev
;
3192 /* Splice the cons cell TAIL out of overlays_after. */
3194 XSETCDR (prev
, next
);
3196 buf
->overlays_after
= next
;
3198 /* Search thru overlays_before for where to put it. */
3200 for (other
= buf
->overlays_before
;
3202 other_prev
= other
, other
= XCDR (other
))
3204 Lisp_Object otherend
, otheroverlay
;
3206 otheroverlay
= XCAR (other
);
3207 if (! OVERLAY_VALID (otheroverlay
))
3210 otherend
= OVERLAY_END (otheroverlay
);
3211 if (OVERLAY_POSITION (otherend
) <= where
)
3215 /* Add TAIL to overlays_before before OTHER. */
3216 XSETCDR (tail
, other
);
3217 if (!NILP (other_prev
))
3218 XSETCDR (other_prev
, tail
);
3220 buf
->overlays_before
= tail
;
3225 XSETFASTINT (buf
->overlay_center
, pos
);
3229 adjust_overlays_for_insert (pos
, length
)
3233 /* After an insertion, the lists are still sorted properly,
3234 but we may need to update the value of the overlay center. */
3235 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3236 XSETFASTINT (current_buffer
->overlay_center
,
3237 XFASTINT (current_buffer
->overlay_center
) + length
);
3241 adjust_overlays_for_delete (pos
, length
)
3245 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3246 /* The deletion was to our right. No change needed; the before- and
3247 after-lists are still consistent. */
3249 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3250 /* The deletion was to our left. We need to adjust the center value
3251 to account for the change in position, but the lists are consistent
3252 given the new value. */
3253 XSETFASTINT (current_buffer
->overlay_center
,
3254 XFASTINT (current_buffer
->overlay_center
) - length
);
3256 /* We're right in the middle. There might be things on the after-list
3257 that now belong on the before-list. Recentering will move them,
3258 and also update the center point. */
3259 recenter_overlay_lists (current_buffer
, pos
);
3262 /* Fix up overlays that were garbled as a result of permuting markers
3263 in the range START through END. Any overlay with at least one
3264 endpoint in this range will need to be unlinked from the overlay
3265 list and reinserted in its proper place.
3266 Such an overlay might even have negative size at this point.
3267 If so, we'll reverse the endpoints. Can you think of anything
3268 better to do in this situation? */
3270 fix_overlays_in_range (start
, end
)
3271 register int start
, end
;
3273 Lisp_Object overlay
;
3274 Lisp_Object before_list
, after_list
;
3275 /* These are either nil, indicating that before_list or after_list
3276 should be assigned, or the cons cell the cdr of which should be
3278 Lisp_Object beforep
= Qnil
, afterp
= Qnil
;
3279 /* 'Parent', likewise, indicates a cons cell or
3280 current_buffer->overlays_before or overlays_after, depending
3281 which loop we're in. */
3282 Lisp_Object tail
, parent
;
3283 int startpos
, endpos
;
3285 /* This algorithm shifts links around instead of consing and GCing.
3286 The loop invariant is that before_list (resp. after_list) is a
3287 well-formed list except that its last element, the CDR of beforep
3288 (resp. afterp) if beforep (afterp) isn't nil or before_list
3289 (after_list) if it is, is still uninitialized. So it's not a bug
3290 that before_list isn't initialized, although it may look
3292 for (parent
= Qnil
, tail
= current_buffer
->overlays_before
; CONSP (tail
);)
3294 overlay
= XCAR (tail
);
3295 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3298 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3300 || (startpos
>= start
&& startpos
< end
))
3302 /* If the overlay is backwards, fix that now. */
3303 if (startpos
> endpos
)
3306 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3308 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3310 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3312 /* Add it to the end of the wrong list. Later on,
3313 recenter_overlay_lists will move it to the right place. */
3314 if (endpos
< XINT (current_buffer
->overlay_center
))
3319 XSETCDR (afterp
, tail
);
3327 XSETCDR (beforep
, tail
);
3331 current_buffer
->overlays_before
= XCDR (tail
);
3333 XSETCDR (parent
, XCDR (tail
));
3337 parent
= tail
, tail
= XCDR (parent
);
3339 for (parent
= Qnil
, tail
= current_buffer
->overlays_after
; CONSP (tail
);)
3341 overlay
= XCAR (tail
);
3342 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3343 if (startpos
>= end
)
3345 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3346 if (startpos
>= start
3347 || (endpos
>= start
&& endpos
< end
))
3349 if (startpos
> endpos
)
3352 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3354 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3356 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3358 if (endpos
< XINT (current_buffer
->overlay_center
))
3363 XSETCDR (afterp
, tail
);
3371 XSETCDR (beforep
, tail
);
3375 current_buffer
->overlays_after
= XCDR (tail
);
3377 XSETCDR (parent
, XCDR (tail
));
3381 parent
= tail
, tail
= XCDR (parent
);
3384 /* Splice the constructed (wrong) lists into the buffer's lists,
3385 and let the recenter function make it sane again. */
3386 if (!NILP (beforep
))
3388 XSETCDR (beforep
, current_buffer
->overlays_before
);
3389 current_buffer
->overlays_before
= before_list
;
3391 recenter_overlay_lists (current_buffer
,
3392 XINT (current_buffer
->overlay_center
));
3396 XSETCDR (afterp
, current_buffer
->overlays_after
);
3397 current_buffer
->overlays_after
= after_list
;
3399 recenter_overlay_lists (current_buffer
,
3400 XINT (current_buffer
->overlay_center
));
3403 /* We have two types of overlay: the one whose ending marker is
3404 after-insertion-marker (this is the usual case) and the one whose
3405 ending marker is before-insertion-marker. When `overlays_before'
3406 contains overlays of the latter type and the former type in this
3407 order and both overlays end at inserting position, inserting a text
3408 increases only the ending marker of the latter type, which results
3409 in incorrect ordering of `overlays_before'.
3411 This function fixes ordering of overlays in the slot
3412 `overlays_before' of the buffer *BP. Before the insertion, `point'
3413 was at PREV, and now is at POS. */
3416 fix_overlays_before (bp
, prev
, pos
)
3420 /* If parent is nil, replace overlays_before; otherwise, XCDR(parent). */
3421 Lisp_Object tail
= bp
->overlays_before
, parent
= Qnil
;
3422 Lisp_Object right_pair
;
3425 /* After the insertion, the several overlays may be in incorrect
3426 order. The possibility is that, in the list `overlays_before',
3427 an overlay which ends at POS appears after an overlay which ends
3428 at PREV. Since POS is greater than PREV, we must fix the
3429 ordering of these overlays, by moving overlays ends at POS before
3430 the overlays ends at PREV. */
3432 /* At first, find a place where disordered overlays should be linked
3433 in. It is where an overlay which end before POS exists. (i.e. an
3434 overlay whose ending marker is after-insertion-marker if disorder
3437 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
))))
3444 /* If we don't find such an overlay,
3445 or the found one ends before PREV,
3446 or the found one is the last one in the list,
3447 we don't have to fix anything. */
3450 || NILP (XCDR (tail
)))
3453 right_pair
= parent
;
3457 /* Now, end position of overlays in the list TAIL should be before
3458 or equal to PREV. In the loop, an overlay which ends at POS is
3459 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3460 we found an overlay which ends before PREV, the remaining
3461 overlays are in correct order. */
3462 while (!NILP (tail
))
3464 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (tail
)));
3467 { /* This overlay is disordered. */
3468 Lisp_Object found
= tail
;
3470 /* Unlink the found overlay. */
3471 tail
= XCDR (found
);
3472 XSETCDR (parent
, tail
);
3473 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3474 and link it into the right place. */
3475 if (NILP (right_pair
))
3477 XSETCDR (found
, bp
->overlays_before
);
3478 bp
->overlays_before
= found
;
3482 XSETCDR (found
, XCDR (right_pair
));
3483 XSETCDR (right_pair
, found
);
3486 else if (end
== prev
)
3491 else /* No more disordered overlay. */
3496 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3497 doc
: /* Return t if OBJECT is an overlay. */)
3501 return (OVERLAYP (object
) ? Qt
: Qnil
);
3504 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3505 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3506 If omitted, BUFFER defaults to the current buffer.
3507 BEG and END may be integers or markers.
3508 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3509 front delimiter advance when text is inserted there.
3510 The fifth arg REAR-ADVANCE, if non-nil, makes the
3511 rear delimiter advance when text is inserted there. */)
3512 (beg
, end
, buffer
, front_advance
, rear_advance
)
3513 Lisp_Object beg
, end
, buffer
;
3514 Lisp_Object front_advance
, rear_advance
;
3516 Lisp_Object overlay
;
3520 XSETBUFFER (buffer
, current_buffer
);
3522 CHECK_BUFFER (buffer
);
3524 && ! EQ (Fmarker_buffer (beg
), buffer
))
3525 error ("Marker points into wrong buffer");
3527 && ! EQ (Fmarker_buffer (end
), buffer
))
3528 error ("Marker points into wrong buffer");
3530 CHECK_NUMBER_COERCE_MARKER (beg
);
3531 CHECK_NUMBER_COERCE_MARKER (end
);
3533 if (XINT (beg
) > XINT (end
))
3536 temp
= beg
; beg
= end
; end
= temp
;
3539 b
= XBUFFER (buffer
);
3541 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3542 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3544 if (!NILP (front_advance
))
3545 XMARKER (beg
)->insertion_type
= 1;
3546 if (!NILP (rear_advance
))
3547 XMARKER (end
)->insertion_type
= 1;
3549 overlay
= allocate_misc ();
3550 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3551 XOVERLAY (overlay
)->start
= beg
;
3552 XOVERLAY (overlay
)->end
= end
;
3553 XOVERLAY (overlay
)->plist
= Qnil
;
3555 /* Put the new overlay on the wrong list. */
3556 end
= OVERLAY_END (overlay
);
3557 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3558 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3560 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3562 /* This puts it in the right list, and in the right order. */
3563 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3565 /* We don't need to redisplay the region covered by the overlay, because
3566 the overlay has no properties at the moment. */
3571 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3574 modify_overlay (buf
, start
, end
)
3585 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3587 /* If this is a buffer not in the selected window,
3588 we must do other windows. */
3589 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3590 windows_or_buffers_changed
= 1;
3591 /* If multiple windows show this buffer, we must do other windows. */
3592 else if (buffer_shared
> 1)
3593 windows_or_buffers_changed
= 1;
3595 ++BUF_OVERLAY_MODIFF (buf
);
3599 Lisp_Object
Fdelete_overlay ();
3601 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3602 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3603 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3604 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3606 (overlay
, beg
, end
, buffer
)
3607 Lisp_Object overlay
, beg
, end
, buffer
;
3609 struct buffer
*b
, *ob
;
3610 Lisp_Object obuffer
;
3611 int count
= SPECPDL_INDEX ();
3613 CHECK_OVERLAY (overlay
);
3615 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3617 XSETBUFFER (buffer
, current_buffer
);
3618 CHECK_BUFFER (buffer
);
3621 && ! EQ (Fmarker_buffer (beg
), buffer
))
3622 error ("Marker points into wrong buffer");
3624 && ! EQ (Fmarker_buffer (end
), buffer
))
3625 error ("Marker points into wrong buffer");
3627 CHECK_NUMBER_COERCE_MARKER (beg
);
3628 CHECK_NUMBER_COERCE_MARKER (end
);
3630 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3631 return Fdelete_overlay (overlay
);
3633 if (XINT (beg
) > XINT (end
))
3636 temp
= beg
; beg
= end
; end
= temp
;
3639 specbind (Qinhibit_quit
, Qt
);
3641 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3642 b
= XBUFFER (buffer
);
3643 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3645 /* If the overlay has changed buffers, do a thorough redisplay. */
3646 if (!EQ (buffer
, obuffer
))
3648 /* Redisplay where the overlay was. */
3649 if (!NILP (obuffer
))
3654 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3655 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3657 modify_overlay (ob
, o_beg
, o_end
);
3660 /* Redisplay where the overlay is going to be. */
3661 modify_overlay (b
, XINT (beg
), XINT (end
));
3664 /* Redisplay the area the overlay has just left, or just enclosed. */
3668 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3669 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3671 if (o_beg
== XINT (beg
))
3672 modify_overlay (b
, o_end
, XINT (end
));
3673 else if (o_end
== XINT (end
))
3674 modify_overlay (b
, o_beg
, XINT (beg
));
3677 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3678 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3679 modify_overlay (b
, o_beg
, o_end
);
3683 if (!NILP (obuffer
))
3685 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3686 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3689 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3690 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3692 /* Put the overlay on the wrong list. */
3693 end
= OVERLAY_END (overlay
);
3694 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3695 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3697 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3699 /* This puts it in the right list, and in the right order. */
3700 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3702 return unbind_to (count
, overlay
);
3705 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3706 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3708 Lisp_Object overlay
;
3712 int count
= SPECPDL_INDEX ();
3714 CHECK_OVERLAY (overlay
);
3716 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3720 b
= XBUFFER (buffer
);
3721 specbind (Qinhibit_quit
, Qt
);
3723 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3724 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3726 marker_position (OVERLAY_START (overlay
)),
3727 marker_position (OVERLAY_END (overlay
)));
3728 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3729 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3731 /* When deleting an overlay with before or after strings, turn off
3732 display optimizations for the affected buffer, on the basis that
3733 these strings may contain newlines. This is easier to do than to
3734 check for that situation during redisplay. */
3735 if (!windows_or_buffers_changed
3736 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3737 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3738 b
->prevent_redisplay_optimizations_p
= 1;
3740 return unbind_to (count
, Qnil
);
3743 /* Overlay dissection functions. */
3745 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3746 doc
: /* Return the position at which OVERLAY starts. */)
3748 Lisp_Object overlay
;
3750 CHECK_OVERLAY (overlay
);
3752 return (Fmarker_position (OVERLAY_START (overlay
)));
3755 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3756 doc
: /* Return the position at which OVERLAY ends. */)
3758 Lisp_Object overlay
;
3760 CHECK_OVERLAY (overlay
);
3762 return (Fmarker_position (OVERLAY_END (overlay
)));
3765 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3766 doc
: /* Return the buffer OVERLAY belongs to. */)
3768 Lisp_Object overlay
;
3770 CHECK_OVERLAY (overlay
);
3772 return Fmarker_buffer (OVERLAY_START (overlay
));
3775 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3776 doc
: /* Return a list of the properties on OVERLAY.
3777 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3780 Lisp_Object overlay
;
3782 CHECK_OVERLAY (overlay
);
3784 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3788 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3789 doc
: /* Return a list of the overlays that contain position POS. */)
3794 Lisp_Object
*overlay_vec
;
3798 CHECK_NUMBER_COERCE_MARKER (pos
);
3801 /* We can't use alloca here because overlays_at can call xrealloc. */
3802 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3804 /* Put all the overlays we want in a vector in overlay_vec.
3805 Store the length in len. */
3806 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3807 (int *) 0, (int *) 0, 0);
3809 /* Make a list of them all. */
3810 result
= Flist (noverlays
, overlay_vec
);
3812 xfree (overlay_vec
);
3816 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3817 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3818 Overlap means that at least one character is contained within the overlay
3819 and also contained within the specified region.
3820 Empty overlays are included in the result if they are located at BEG
3821 or between BEG and END. */)
3823 Lisp_Object beg
, end
;
3826 Lisp_Object
*overlay_vec
;
3830 CHECK_NUMBER_COERCE_MARKER (beg
);
3831 CHECK_NUMBER_COERCE_MARKER (end
);
3834 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3836 /* Put all the overlays we want in a vector in overlay_vec.
3837 Store the length in len. */
3838 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3839 (int *) 0, (int *) 0);
3841 /* Make a list of them all. */
3842 result
= Flist (noverlays
, overlay_vec
);
3844 xfree (overlay_vec
);
3848 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3850 doc
: /* Return the next position after POS where an overlay starts or ends.
3851 If there are no more overlay boundaries after POS, return (point-max). */)
3857 Lisp_Object
*overlay_vec
;
3861 CHECK_NUMBER_COERCE_MARKER (pos
);
3864 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3866 /* Put all the overlays we want in a vector in overlay_vec.
3867 Store the length in len.
3868 endpos gets the position where the next overlay starts. */
3869 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3870 &endpos
, (int *) 0, 1);
3872 /* If any of these overlays ends before endpos,
3873 use its ending point instead. */
3874 for (i
= 0; i
< noverlays
; i
++)
3879 oend
= OVERLAY_END (overlay_vec
[i
]);
3880 oendpos
= OVERLAY_POSITION (oend
);
3881 if (oendpos
< endpos
)
3885 xfree (overlay_vec
);
3886 return make_number (endpos
);
3889 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3890 Sprevious_overlay_change
, 1, 1, 0,
3891 doc
: /* Return the previous position before POS where an overlay starts or ends.
3892 If there are no more overlay boundaries before POS, return (point-min). */)
3898 Lisp_Object
*overlay_vec
;
3901 CHECK_NUMBER_COERCE_MARKER (pos
);
3903 /* At beginning of buffer, we know the answer;
3904 avoid bug subtracting 1 below. */
3905 if (XINT (pos
) == BEGV
)
3909 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3911 /* Put all the overlays we want in a vector in overlay_vec.
3912 Store the length in len.
3913 prevpos gets the position of the previous change. */
3914 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3915 (int *) 0, &prevpos
, 1);
3917 xfree (overlay_vec
);
3918 return make_number (prevpos
);
3921 /* These functions are for debugging overlays. */
3923 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3924 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3925 The car has all the overlays before the overlay center;
3926 the cdr has all the overlays after the overlay center.
3927 Recentering overlays moves overlays between these lists.
3928 The lists you get are copies, so that changing them has no effect.
3929 However, the overlays you get are the real objects that the buffer uses. */)
3932 Lisp_Object before
, after
;
3933 before
= current_buffer
->overlays_before
;
3935 before
= Fcopy_sequence (before
);
3936 after
= current_buffer
->overlays_after
;
3938 after
= Fcopy_sequence (after
);
3940 return Fcons (before
, after
);
3943 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3944 doc
: /* Recenter the overlays of the current buffer around position POS.
3945 That makes overlay lookup faster for positions near POS (but perhaps slower
3946 for positions far away from POS). */)
3950 CHECK_NUMBER_COERCE_MARKER (pos
);
3952 recenter_overlay_lists (current_buffer
, XINT (pos
));
3956 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3957 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
3959 Lisp_Object overlay
, prop
;
3961 CHECK_OVERLAY (overlay
);
3962 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
3965 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3966 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
3967 (overlay
, prop
, value
)
3968 Lisp_Object overlay
, prop
, value
;
3970 Lisp_Object tail
, buffer
;
3973 CHECK_OVERLAY (overlay
);
3975 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3977 for (tail
= XOVERLAY (overlay
)->plist
;
3978 CONSP (tail
) && CONSP (XCDR (tail
));
3979 tail
= XCDR (XCDR (tail
)))
3980 if (EQ (XCAR (tail
), prop
))
3982 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3983 XSETCAR (XCDR (tail
), value
);
3986 /* It wasn't in the list, so add it to the front. */
3987 changed
= !NILP (value
);
3988 XOVERLAY (overlay
)->plist
3989 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3991 if (! NILP (buffer
))
3994 modify_overlay (XBUFFER (buffer
),
3995 marker_position (OVERLAY_START (overlay
)),
3996 marker_position (OVERLAY_END (overlay
)));
3997 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3998 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3999 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4000 Fdelete_overlay (overlay
);
4005 /* Subroutine of report_overlay_modification. */
4007 /* Lisp vector holding overlay hook functions to call.
4008 Vector elements come in pairs.
4009 Each even-index element is a list of hook functions.
4010 The following odd-index element is the overlay they came from.
4012 Before the buffer change, we fill in this vector
4013 as we call overlay hook functions.
4014 After the buffer change, we get the functions to call from this vector.
4015 This way we always call the same functions before and after the change. */
4016 static Lisp_Object last_overlay_modification_hooks
;
4018 /* Number of elements actually used in last_overlay_modification_hooks. */
4019 static int last_overlay_modification_hooks_used
;
4021 /* Add one functionlist/overlay pair
4022 to the end of last_overlay_modification_hooks. */
4025 add_overlay_mod_hooklist (functionlist
, overlay
)
4026 Lisp_Object functionlist
, overlay
;
4028 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4030 if (last_overlay_modification_hooks_used
== oldsize
)
4033 old
= last_overlay_modification_hooks
;
4034 last_overlay_modification_hooks
4035 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4036 bcopy (XVECTOR (old
)->contents
,
4037 XVECTOR (last_overlay_modification_hooks
)->contents
,
4038 sizeof (Lisp_Object
) * oldsize
);
4040 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
4041 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
4044 /* Run the modification-hooks of overlays that include
4045 any part of the text in START to END.
4046 If this change is an insertion, also
4047 run the insert-before-hooks of overlay starting at END,
4048 and the insert-after-hooks of overlay ending at START.
4050 This is called both before and after the modification.
4051 AFTER is nonzero when we call after the modification.
4053 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4054 When AFTER is nonzero, they are the start position,
4055 the position after the inserted new text,
4056 and the length of deleted or replaced old text. */
4059 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4060 Lisp_Object start
, end
;
4062 Lisp_Object arg1
, arg2
, arg3
;
4064 Lisp_Object prop
, overlay
, tail
;
4065 /* 1 if this change is an insertion. */
4066 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4068 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4072 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
4076 /* Call the functions recorded in last_overlay_modification_hooks
4077 rather than scanning the overlays again.
4078 First copy the vector contents, in case some of these hooks
4079 do subsequent modification of the buffer. */
4080 int size
= last_overlay_modification_hooks_used
;
4081 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4084 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4085 copy
, size
* sizeof (Lisp_Object
));
4087 gcpro1
.nvars
= size
;
4089 for (i
= 0; i
< size
;)
4091 Lisp_Object prop
, overlay
;
4093 overlay
= copy
[i
++];
4094 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4100 /* We are being called before a change.
4101 Scan the overlays to find the functions to call. */
4102 last_overlay_modification_hooks_used
= 0;
4104 for (tail
= current_buffer
->overlays_before
;
4108 int startpos
, endpos
;
4109 Lisp_Object ostart
, oend
;
4111 overlay
= XCAR (tail
);
4113 ostart
= OVERLAY_START (overlay
);
4114 oend
= OVERLAY_END (overlay
);
4115 endpos
= OVERLAY_POSITION (oend
);
4116 if (XFASTINT (start
) > endpos
)
4118 startpos
= OVERLAY_POSITION (ostart
);
4119 if (insertion
&& (XFASTINT (start
) == startpos
4120 || XFASTINT (end
) == startpos
))
4122 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4125 /* Copy TAIL in case the hook recenters the overlay lists. */
4127 tail
= Fcopy_sequence (tail
);
4129 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4132 if (insertion
&& (XFASTINT (start
) == endpos
4133 || XFASTINT (end
) == endpos
))
4135 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4139 tail
= Fcopy_sequence (tail
);
4141 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4144 /* Test for intersecting intervals. This does the right thing
4145 for both insertion and deletion. */
4146 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4148 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4152 tail
= Fcopy_sequence (tail
);
4154 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4160 for (tail
= current_buffer
->overlays_after
;
4164 int startpos
, endpos
;
4165 Lisp_Object ostart
, oend
;
4167 overlay
= XCAR (tail
);
4169 ostart
= OVERLAY_START (overlay
);
4170 oend
= OVERLAY_END (overlay
);
4171 startpos
= OVERLAY_POSITION (ostart
);
4172 endpos
= OVERLAY_POSITION (oend
);
4173 if (XFASTINT (end
) < startpos
)
4175 if (insertion
&& (XFASTINT (start
) == startpos
4176 || XFASTINT (end
) == startpos
))
4178 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4182 tail
= Fcopy_sequence (tail
);
4184 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4187 if (insertion
&& (XFASTINT (start
) == endpos
4188 || XFASTINT (end
) == endpos
))
4190 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4194 tail
= Fcopy_sequence (tail
);
4196 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4199 /* Test for intersecting intervals. This does the right thing
4200 for both insertion and deletion. */
4201 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4203 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4207 tail
= Fcopy_sequence (tail
);
4209 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4218 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4219 Lisp_Object list
, overlay
;
4221 Lisp_Object arg1
, arg2
, arg3
;
4223 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4225 GCPRO4 (list
, arg1
, arg2
, arg3
);
4227 add_overlay_mod_hooklist (list
, overlay
);
4229 while (CONSP (list
))
4232 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4234 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4240 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4243 evaporate_overlays (pos
)
4246 Lisp_Object tail
, overlay
, hit_list
;
4249 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4250 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4254 overlay
= XCAR (tail
);
4255 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4258 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4259 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4260 hit_list
= Fcons (overlay
, hit_list
);
4263 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4267 overlay
= XCAR (tail
);
4268 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4271 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4272 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4273 hit_list
= Fcons (overlay
, hit_list
);
4275 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4276 Fdelete_overlay (XCAR (hit_list
));
4279 /* Somebody has tried to store a value with an unacceptable type
4280 in the slot with offset OFFSET. */
4283 buffer_slot_type_mismatch (offset
)
4289 switch (XINT (PER_BUFFER_TYPE (offset
)))
4292 type_name
= "integers";
4296 type_name
= "strings";
4300 type_name
= "symbols";
4307 sym
= PER_BUFFER_SYMBOL (offset
);
4308 error ("Only %s should be stored in the buffer-local variable %s",
4309 type_name
, SDATA (SYMBOL_NAME (sym
)));
4313 /***********************************************************************
4314 Allocation with mmap
4315 ***********************************************************************/
4317 #ifdef USE_MMAP_FOR_BUFFERS
4319 #include <sys/types.h>
4320 #include <sys/mman.h>
4323 #ifdef MAP_ANONYMOUS
4324 #define MAP_ANON MAP_ANONYMOUS
4331 #define MAP_FAILED ((void *) -1)
4344 /* Memory is allocated in regions which are mapped using mmap(2).
4345 The current implementation lets the system select mapped
4346 addresses; we're not using MAP_FIXED in general, except when
4347 trying to enlarge regions.
4349 Each mapped region starts with a mmap_region structure, the user
4350 area starts after that structure, aligned to MEM_ALIGN.
4352 +-----------------------+
4353 | struct mmap_info + |
4355 +-----------------------+
4359 +-----------------------+ */
4363 /* User-specified size. */
4364 size_t nbytes_specified
;
4366 /* Number of bytes mapped */
4367 size_t nbytes_mapped
;
4369 /* Pointer to the location holding the address of the memory
4370 allocated with the mmap'd block. The variable actually points
4371 after this structure. */
4374 /* Next and previous in list of all mmap'd regions. */
4375 struct mmap_region
*next
, *prev
;
4378 /* Doubly-linked list of mmap'd regions. */
4380 static struct mmap_region
*mmap_regions
;
4382 /* File descriptor for mmap. If we don't have anonymous mapping,
4383 /dev/zero will be opened on it. */
4387 /* Temporary storage for mmap_set_vars, see there. */
4389 static struct mmap_region
*mmap_regions_1
;
4390 static int mmap_fd_1
;
4392 /* Page size on this system. */
4394 static int mmap_page_size
;
4396 /* 1 means mmap has been intialized. */
4398 static int mmap_initialized_p
;
4400 /* Value is X rounded up to the next multiple of N. */
4402 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4404 /* Size of mmap_region structure plus padding. */
4406 #define MMAP_REGION_STRUCT_SIZE \
4407 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4409 /* Given a pointer P to the start of the user-visible part of a mapped
4410 region, return a pointer to the start of the region. */
4412 #define MMAP_REGION(P) \
4413 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4415 /* Given a pointer P to the start of a mapped region, return a pointer
4416 to the start of the user-visible part of the region. */
4418 #define MMAP_USER_AREA(P) \
4419 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4421 #define MEM_ALIGN sizeof (double)
4423 /* Predicate returning true if part of the address range [START .. END]
4424 is currently mapped. Used to prevent overwriting an existing
4427 Default is to conservativly assume the address range is occupied by
4428 something else. This can be overridden by system configuration
4429 files if system-specific means to determine this exists. */
4431 #ifndef MMAP_ALLOCATED_P
4432 #define MMAP_ALLOCATED_P(start, end) 1
4435 /* Function prototypes. */
4437 static int mmap_free_1
P_ ((struct mmap_region
*));
4438 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4439 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4440 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4441 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4442 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4443 static void mmap_init
P_ ((void));
4446 /* Return a region overlapping address range START...END, or null if
4447 none. END is not including, i.e. the last byte in the range
4450 static struct mmap_region
*
4451 mmap_find (start
, end
)
4452 POINTER_TYPE
*start
, *end
;
4454 struct mmap_region
*r
;
4455 char *s
= (char *) start
, *e
= (char *) end
;
4457 for (r
= mmap_regions
; r
; r
= r
->next
)
4459 char *rstart
= (char *) r
;
4460 char *rend
= rstart
+ r
->nbytes_mapped
;
4462 if (/* First byte of range, i.e. START, in this region? */
4463 (s
>= rstart
&& s
< rend
)
4464 /* Last byte of range, i.e. END - 1, in this region? */
4465 || (e
> rstart
&& e
<= rend
)
4466 /* First byte of this region in the range? */
4467 || (rstart
>= s
&& rstart
< e
)
4468 /* Last byte of this region in the range? */
4469 || (rend
> s
&& rend
<= e
))
4477 /* Unmap a region. P is a pointer to the start of the user-araa of
4478 the region. Value is non-zero if successful. */
4482 struct mmap_region
*r
;
4485 r
->next
->prev
= r
->prev
;
4487 r
->prev
->next
= r
->next
;
4489 mmap_regions
= r
->next
;
4491 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4493 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4501 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4502 Value is non-zero if successful. */
4505 mmap_enlarge (r
, npages
)
4506 struct mmap_region
*r
;
4509 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4515 /* Unmap pages at the end of the region. */
4516 nbytes
= - npages
* mmap_page_size
;
4517 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4518 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4521 r
->nbytes_mapped
-= nbytes
;
4525 else if (npages
> 0)
4527 nbytes
= npages
* mmap_page_size
;
4529 /* Try to map additional pages at the end of the region. We
4530 cannot do this if the address range is already occupied by
4531 something else because mmap deletes any previous mapping.
4532 I'm not sure this is worth doing, let's see. */
4533 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4537 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4538 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4539 if (p
== MAP_FAILED
)
4540 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4541 else if (p
!= (POINTER_TYPE
*) region_end
)
4543 /* Kernels are free to choose a different address. In
4544 that case, unmap what we've mapped above; we have
4546 if (munmap (p
, nbytes
) == -1)
4547 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4551 r
->nbytes_mapped
+= nbytes
;
4561 /* Set or reset variables holding references to mapped regions. If
4562 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4563 non-zero, set all variables to the start of the user-areas
4566 This function is called from Fdump_emacs to ensure that the dumped
4567 Emacs doesn't contain references to memory that won't be mapped
4568 when Emacs starts. */
4571 mmap_set_vars (restore_p
)
4574 struct mmap_region
*r
;
4578 mmap_regions
= mmap_regions_1
;
4579 mmap_fd
= mmap_fd_1
;
4580 for (r
= mmap_regions
; r
; r
= r
->next
)
4581 *r
->var
= MMAP_USER_AREA (r
);
4585 for (r
= mmap_regions
; r
; r
= r
->next
)
4587 mmap_regions_1
= mmap_regions
;
4588 mmap_regions
= NULL
;
4589 mmap_fd_1
= mmap_fd
;
4595 /* Allocate a block of storage large enough to hold NBYTES bytes of
4596 data. A pointer to the data is returned in *VAR. VAR is thus the
4597 address of some variable which will use the data area.
4599 The allocation of 0 bytes is valid.
4601 If we can't allocate the necessary memory, set *VAR to null, and
4604 static POINTER_TYPE
*
4605 mmap_alloc (var
, nbytes
)
4614 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4615 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4618 if (p
== MAP_FAILED
)
4620 if (errno
!= ENOMEM
)
4621 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4626 struct mmap_region
*r
= (struct mmap_region
*) p
;
4628 r
->nbytes_specified
= nbytes
;
4629 r
->nbytes_mapped
= map
;
4632 r
->next
= mmap_regions
;
4637 p
= MMAP_USER_AREA (p
);
4644 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4645 resize it to size NBYTES. Change *VAR to reflect the new block,
4646 and return this value. If more memory cannot be allocated, then
4647 leave *VAR unchanged, and return null. */
4649 static POINTER_TYPE
*
4650 mmap_realloc (var
, nbytes
)
4654 POINTER_TYPE
*result
;
4659 result
= mmap_alloc (var
, nbytes
);
4660 else if (nbytes
== 0)
4663 result
= mmap_alloc (var
, nbytes
);
4667 struct mmap_region
*r
= MMAP_REGION (*var
);
4668 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4673 POINTER_TYPE
*old_ptr
= *var
;
4675 /* Try to map additional pages at the end of the region.
4676 If that fails, allocate a new region, copy data
4677 from the old region, then free it. */
4678 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4681 r
->nbytes_specified
= nbytes
;
4682 *var
= result
= old_ptr
;
4684 else if (mmap_alloc (var
, nbytes
))
4686 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4687 mmap_free_1 (MMAP_REGION (old_ptr
));
4689 r
= MMAP_REGION (result
);
4690 r
->nbytes_specified
= nbytes
;
4698 else if (room
- nbytes
>= mmap_page_size
)
4700 /* Shrinking by at least a page. Let's give some
4701 memory back to the system.
4703 The extra parens are to make the division happens first,
4704 on positive values, so we know it will round towards
4706 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4708 r
->nbytes_specified
= nbytes
;
4712 /* Leave it alone. */
4714 r
->nbytes_specified
= nbytes
;
4722 /* Free a block of relocatable storage whose data is pointed to by
4723 PTR. Store 0 in *PTR to show there's no block allocated. */
4733 mmap_free_1 (MMAP_REGION (*var
));
4739 /* Perform necessary intializations for the use of mmap. */
4745 /* The value of mmap_fd is initially 0 in temacs, and -1
4746 in a dumped Emacs. */
4749 /* No anonymous mmap -- we need the file descriptor. */
4750 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4752 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4754 #endif /* MAP_ANON == 0 */
4756 if (mmap_initialized_p
)
4758 mmap_initialized_p
= 1;
4764 mmap_page_size
= getpagesize ();
4767 #endif /* USE_MMAP_FOR_BUFFERS */
4771 /***********************************************************************
4772 Buffer-text Allocation
4773 ***********************************************************************/
4776 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4777 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4778 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4779 #endif /* REL_ALLOC */
4782 /* Allocate NBYTES bytes for buffer B's text buffer. */
4785 alloc_buffer_text (b
, nbytes
)
4792 #if defined USE_MMAP_FOR_BUFFERS
4793 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4794 #elif defined REL_ALLOC
4795 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4797 p
= xmalloc (nbytes
);
4806 b
->text
->beg
= (unsigned char *) p
;
4810 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4814 enlarge_buffer_text (b
, delta
)
4819 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4822 #if defined USE_MMAP_FOR_BUFFERS
4823 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4824 #elif defined REL_ALLOC
4825 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4827 p
= xrealloc (b
->text
->beg
, nbytes
);
4836 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4841 /* Free buffer B's text buffer. */
4844 free_buffer_text (b
)
4849 #if defined USE_MMAP_FOR_BUFFERS
4850 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4851 #elif defined REL_ALLOC
4852 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4854 xfree (b
->text
->beg
);
4857 BUF_BEG_ADDR (b
) = NULL
;
4863 /***********************************************************************
4865 ***********************************************************************/
4872 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4874 /* Make sure all markable slots in buffer_defaults
4875 are initialized reasonably, so mark_buffer won't choke. */
4876 reset_buffer (&buffer_defaults
);
4877 reset_buffer_local_variables (&buffer_defaults
, 1);
4878 reset_buffer (&buffer_local_symbols
);
4879 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4880 /* Prevent GC from getting confused. */
4881 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4882 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4883 BUF_INTERVALS (&buffer_defaults
) = 0;
4884 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4885 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4886 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4888 /* Set up the default values of various buffer slots. */
4889 /* Must do these before making the first buffer! */
4891 /* real setup is done in bindings.el */
4892 buffer_defaults
.mode_line_format
= build_string ("%-");
4893 buffer_defaults
.header_line_format
= Qnil
;
4894 buffer_defaults
.abbrev_mode
= Qnil
;
4895 buffer_defaults
.overwrite_mode
= Qnil
;
4896 buffer_defaults
.case_fold_search
= Qt
;
4897 buffer_defaults
.auto_fill_function
= Qnil
;
4898 buffer_defaults
.selective_display
= Qnil
;
4900 buffer_defaults
.selective_display_ellipses
= Qt
;
4902 buffer_defaults
.abbrev_table
= Qnil
;
4903 buffer_defaults
.display_table
= Qnil
;
4904 buffer_defaults
.undo_list
= Qnil
;
4905 buffer_defaults
.mark_active
= Qnil
;
4906 buffer_defaults
.file_format
= Qnil
;
4907 buffer_defaults
.overlays_before
= Qnil
;
4908 buffer_defaults
.overlays_after
= Qnil
;
4909 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4911 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4912 buffer_defaults
.truncate_lines
= Qnil
;
4913 buffer_defaults
.ctl_arrow
= Qt
;
4914 buffer_defaults
.direction_reversed
= Qnil
;
4915 buffer_defaults
.cursor_type
= Qt
;
4916 buffer_defaults
.extra_line_spacing
= Qnil
;
4919 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4921 buffer_defaults
.enable_multibyte_characters
= Qt
;
4922 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4923 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4924 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4925 buffer_defaults
.cache_long_line_scans
= Qnil
;
4926 buffer_defaults
.file_truename
= Qnil
;
4927 XSETFASTINT (buffer_defaults
.display_count
, 0);
4928 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
4929 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
4930 buffer_defaults
.left_fringe_width
= Qnil
;
4931 buffer_defaults
.right_fringe_width
= Qnil
;
4932 buffer_defaults
.fringes_outside_margins
= Qnil
;
4933 buffer_defaults
.scroll_bar_width
= Qnil
;
4934 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
4935 buffer_defaults
.indicate_empty_lines
= Qnil
;
4936 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4937 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4938 buffer_defaults
.display_time
= Qnil
;
4940 /* Assign the local-flags to the slots that have default values.
4941 The local flag is a bit that is used in the buffer
4942 to say that it has its own local value for the slot.
4943 The local flag bits are in the local_var_flags slot of the buffer. */
4945 /* Nothing can work if this isn't true */
4946 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4948 /* 0 means not a lisp var, -1 means always local, else mask */
4949 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4950 XSETINT (buffer_local_flags
.filename
, -1);
4951 XSETINT (buffer_local_flags
.directory
, -1);
4952 XSETINT (buffer_local_flags
.backed_up
, -1);
4953 XSETINT (buffer_local_flags
.save_length
, -1);
4954 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4955 XSETINT (buffer_local_flags
.read_only
, -1);
4956 XSETINT (buffer_local_flags
.major_mode
, -1);
4957 XSETINT (buffer_local_flags
.mode_name
, -1);
4958 XSETINT (buffer_local_flags
.undo_list
, -1);
4959 XSETINT (buffer_local_flags
.mark_active
, -1);
4960 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4961 XSETINT (buffer_local_flags
.file_truename
, -1);
4962 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4963 XSETINT (buffer_local_flags
.file_format
, -1);
4964 XSETINT (buffer_local_flags
.display_count
, -1);
4965 XSETINT (buffer_local_flags
.display_time
, -1);
4966 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4969 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4970 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4971 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4972 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4973 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4974 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4976 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4978 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4979 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4980 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4981 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4982 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4983 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4984 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4986 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4987 /* Make this one a permanent local. */
4988 buffer_permanent_local_flags
[idx
++] = 1;
4990 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4991 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4992 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4993 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4994 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4995 /* Make this one a permanent local. */
4996 buffer_permanent_local_flags
[idx
++] = 1;
4997 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
4998 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
4999 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5000 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5001 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5002 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5003 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5004 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5005 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5006 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5007 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5008 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5009 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5011 /* Need more room? */
5012 if (idx
>= MAX_PER_BUFFER_VARS
)
5014 last_per_buffer_idx
= idx
;
5016 Vbuffer_alist
= Qnil
;
5020 QSFundamental
= build_string ("Fundamental");
5022 Qfundamental_mode
= intern ("fundamental-mode");
5023 buffer_defaults
.major_mode
= Qfundamental_mode
;
5025 Qmode_class
= intern ("mode-class");
5027 Qprotected_field
= intern ("protected-field");
5029 Qpermanent_local
= intern ("permanent-local");
5031 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5032 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
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
);