1 /* Buffer manipulation primitives for GNU Emacs.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2012 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 3 of the License, or
10 (at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
24 #include <sys/param.h>
33 #include "intervals.h"
36 #include "character.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
45 struct buffer
*current_buffer
; /* the current buffer */
47 /* First buffer in chain of all buffers (in reverse order of creation).
48 Threaded through ->header.next.buffer. */
50 struct buffer
*all_buffers
;
52 /* This structure holds the default values of the buffer-local variables
53 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
54 The default value occupies the same slot in this structure
55 as an individual buffer's value occupies in that buffer.
56 Setting the default value also goes through the alist of buffers
57 and stores into each buffer that does not say it has a local value. */
59 DECL_ALIGN (struct buffer
, buffer_defaults
);
61 /* A Lisp_Object pointer to the above, used for staticpro */
63 static Lisp_Object Vbuffer_defaults
;
65 /* This structure marks which slots in a buffer have corresponding
66 default values in buffer_defaults.
67 Each such slot has a nonzero value in this structure.
68 The value has only one nonzero bit.
70 When a buffer has its own local value for a slot,
71 the entry for that slot (found in the same slot in this structure)
72 is turned on in the buffer's local_flags array.
74 If a slot in this structure is -1, then even though there may
75 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
76 and the corresponding slot in buffer_defaults is not used.
78 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
79 zero, that is a bug */
81 struct buffer buffer_local_flags
;
83 /* This structure holds the names of symbols whose values may be
84 buffer-local. It is indexed and accessed in the same way as the above. */
86 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
88 /* A Lisp_Object pointer to the above, used for staticpro */
89 static Lisp_Object Vbuffer_local_symbols
;
91 /* Return the symbol of the per-buffer variable at offset OFFSET in
92 the buffer structure. */
94 #define PER_BUFFER_SYMBOL(OFFSET) \
95 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
97 /* Maximum length of an overlay vector. */
98 #define OVERLAY_COUNT_MAX \
99 ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \
100 min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object)))
102 /* Flags indicating which built-in buffer-local variables
103 are permanent locals. */
104 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
106 /* Number of per-buffer variables used. */
108 int last_per_buffer_idx
;
110 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
111 int after
, Lisp_Object arg1
,
112 Lisp_Object arg2
, Lisp_Object arg3
);
113 static void swap_out_buffer_local_variables (struct buffer
*b
);
114 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
116 /* Alist of all buffer names vs the buffers. */
117 /* This used to be a variable, but is no longer,
118 to prevent lossage due to user rplac'ing this alist or its elements. */
119 Lisp_Object Vbuffer_alist
;
121 static Lisp_Object Qkill_buffer_query_functions
;
123 /* Hook run before changing a major mode. */
124 static Lisp_Object Qchange_major_mode_hook
;
126 Lisp_Object Qfirst_change_hook
;
127 Lisp_Object Qbefore_change_functions
;
128 Lisp_Object Qafter_change_functions
;
130 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
131 static Lisp_Object Qpermanent_local_hook
;
133 static Lisp_Object Qprotected_field
;
135 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
137 static Lisp_Object Qkill_buffer_hook
;
138 static Lisp_Object Qbuffer_list_update_hook
;
140 static Lisp_Object Qget_file_buffer
;
142 static Lisp_Object Qoverlayp
;
144 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
146 static Lisp_Object Qevaporate
;
148 Lisp_Object Qmodification_hooks
;
149 Lisp_Object Qinsert_in_front_hooks
;
150 Lisp_Object Qinsert_behind_hooks
;
152 static void alloc_buffer_text (struct buffer
*, ptrdiff_t);
153 static void free_buffer_text (struct buffer
*b
);
154 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
155 static void modify_overlay (struct buffer
*, ptrdiff_t, ptrdiff_t);
156 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*);
158 /* For debugging; temporary. See set_buffer_internal. */
159 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
162 nsberror (Lisp_Object spec
)
165 error ("No buffer named %s", SDATA (spec
));
166 error ("Invalid buffer argument");
169 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
170 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
171 Value is nil if OBJECT is not a buffer or if it has been killed. */)
174 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
178 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
179 doc
: /* Return a list of all existing live buffers.
180 If the optional arg FRAME is a frame, we return the buffer list in the
181 proper order for that frame: the buffers show in FRAME come first,
182 followed by the rest of the buffers. */)
186 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
190 Lisp_Object framelist
, prevlist
, tail
;
194 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
195 prevlist
= Fnreverse (Fcopy_sequence
196 (XFRAME (frame
)->buried_buffer_list
));
198 /* Remove from GENERAL any buffer that duplicates one in
199 FRAMELIST or PREVLIST. */
203 general
= Fdelq (XCAR (tail
), general
);
209 general
= Fdelq (XCAR (tail
), general
);
216 return Fnconc (3, args
);
222 /* Like Fassoc, but use Fstring_equal to compare
223 (which ignores text properties),
224 and don't ever QUIT. */
227 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
229 register Lisp_Object tail
;
230 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
232 register Lisp_Object elt
, tem
;
234 tem
= Fstring_equal (Fcar (elt
), key
);
241 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
242 doc
: /* Return the buffer named BUFFER-OR-NAME.
243 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
244 is a string and there is no buffer with that name, return nil. If
245 BUFFER-OR-NAME is a buffer, return it as given. */)
246 (register Lisp_Object buffer_or_name
)
248 if (BUFFERP (buffer_or_name
))
249 return buffer_or_name
;
250 CHECK_STRING (buffer_or_name
);
252 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
255 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
256 doc
: /* Return the buffer visiting file FILENAME (a string).
257 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
258 If there is no such live buffer, return nil.
259 See also `find-buffer-visiting'. */)
260 (register Lisp_Object filename
)
262 register Lisp_Object tail
, buf
, tem
;
265 CHECK_STRING (filename
);
266 filename
= Fexpand_file_name (filename
, Qnil
);
268 /* If the file name has special constructs in it,
269 call the corresponding file handler. */
270 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
273 Lisp_Object handled_buf
= call2 (handler
, Qget_file_buffer
,
275 return BUFFERP (handled_buf
) ? handled_buf
: Qnil
;
278 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
280 buf
= Fcdr (XCAR (tail
));
281 if (!BUFFERP (buf
)) continue;
282 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
283 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
291 get_truename_buffer (register Lisp_Object filename
)
293 register Lisp_Object tail
, buf
, tem
;
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
300 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
307 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
308 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
309 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
310 return that buffer. If no such buffer exists, create a new buffer with
311 that name and return it. If BUFFER-OR-NAME starts with a space, the new
312 buffer does not keep undo information.
314 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
315 even if it is dead. The return value is never nil. */)
316 (register Lisp_Object buffer_or_name
)
318 register Lisp_Object buffer
, name
;
319 register struct buffer
*b
;
321 buffer
= Fget_buffer (buffer_or_name
);
325 if (SCHARS (buffer_or_name
) == 0)
326 error ("Empty string for buffer name is not allowed");
328 b
= allocate_buffer ();
330 /* An ordinary buffer uses its own struct buffer_text. */
331 b
->text
= &b
->own_text
;
334 BUF_GAP_SIZE (b
) = 20;
336 /* We allocate extra 1-byte at the tail and keep it always '\0' for
337 anchoring a search. */
338 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
340 if (! BUF_BEG_ADDR (b
))
341 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
346 b
->pt_byte
= BEG_BYTE
;
347 b
->begv_byte
= BEG_BYTE
;
348 b
->zv_byte
= BEG_BYTE
;
351 BUF_GPT_BYTE (b
) = BEG_BYTE
;
354 BUF_Z_BYTE (b
) = BEG_BYTE
;
356 BUF_CHARS_MODIFF (b
) = 1;
357 BUF_OVERLAY_MODIFF (b
) = 1;
358 BUF_SAVE_MODIFF (b
) = 1;
359 BUF_INTERVALS (b
) = 0;
360 BUF_UNCHANGED_MODIFIED (b
) = 1;
361 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
362 BUF_END_UNCHANGED (b
) = 0;
363 BUF_BEG_UNCHANGED (b
) = 0;
364 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
365 b
->text
->inhibit_shrinking
= 0;
367 b
->newline_cache
= 0;
368 b
->width_run_cache
= 0;
369 BVAR (b
, width_table
) = Qnil
;
370 b
->prevent_redisplay_optimizations_p
= 1;
372 /* Put this on the chain of all buffers including killed ones. */
373 b
->header
.next
.buffer
= all_buffers
;
376 /* An ordinary buffer normally doesn't need markers
377 to handle BEGV and ZV. */
378 BVAR (b
, pt_marker
) = Qnil
;
379 BVAR (b
, begv_marker
) = Qnil
;
380 BVAR (b
, zv_marker
) = Qnil
;
382 name
= Fcopy_sequence (buffer_or_name
);
383 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
384 BVAR (b
, name
) = name
;
386 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
389 reset_buffer_local_variables (b
, 1);
391 BVAR (b
, mark
) = Fmake_marker ();
392 BUF_MARKERS (b
) = NULL
;
394 /* Put this in the alist of all live buffers. */
395 XSETBUFFER (buffer
, b
);
396 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
397 /* And run buffer-list-update-hook. */
398 if (!NILP (Vrun_hooks
))
399 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
405 /* Return a list of overlays which is a copy of the overlay list
406 LIST, but for buffer B. */
408 static struct Lisp_Overlay
*
409 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
412 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
414 XSETBUFFER (buffer
, b
);
416 for (; list
; list
= list
->next
)
418 Lisp_Object overlay
, start
, end
, old_overlay
;
421 XSETMISC (old_overlay
, list
);
422 charpos
= marker_position (OVERLAY_START (old_overlay
));
423 start
= Fmake_marker ();
424 Fset_marker (start
, make_number (charpos
), buffer
);
425 XMARKER (start
)->insertion_type
426 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
428 charpos
= marker_position (OVERLAY_END (old_overlay
));
429 end
= Fmake_marker ();
430 Fset_marker (end
, make_number (charpos
), buffer
);
431 XMARKER (end
)->insertion_type
432 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
434 overlay
= allocate_misc ();
435 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
436 OVERLAY_START (overlay
) = start
;
437 OVERLAY_END (overlay
) = end
;
438 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
439 XOVERLAY (overlay
)->next
= NULL
;
442 tail
= tail
->next
= XOVERLAY (overlay
);
444 result
= tail
= XOVERLAY (overlay
);
451 /* Clone per-buffer values of buffer FROM.
453 Buffer TO gets the same per-buffer values as FROM, with the
454 following exceptions: (1) TO's name is left untouched, (2) markers
455 are copied and made to refer to TO, and (3) overlay lists are
459 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
461 Lisp_Object to_buffer
;
464 XSETBUFFER (to_buffer
, to
);
466 for_each_per_buffer_object_at (offset
)
470 /* Don't touch the `name' which should be unique for every buffer. */
471 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
474 obj
= PER_BUFFER_VALUE (from
, offset
);
475 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
477 struct Lisp_Marker
*m
= XMARKER (obj
);
478 obj
= Fmake_marker ();
479 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
480 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
483 PER_BUFFER_VALUE (to
, offset
) = obj
;
486 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
488 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
489 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
491 /* Get (a copy of) the alist of Lisp-level local variables of FROM
492 and install that in TO. */
493 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
497 /* If buffer B has markers to record PT, BEGV and ZV when it is not
498 current, update these markers. */
501 record_buffer_markers (struct buffer
*b
)
503 if (! NILP (BVAR (b
, pt_marker
)))
507 eassert (!NILP (BVAR (b
, begv_marker
)));
508 eassert (!NILP (BVAR (b
, zv_marker
)));
510 XSETBUFFER (buffer
, b
);
511 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
512 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
513 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
518 /* If buffer B has markers to record PT, BEGV and ZV when it is not
519 current, fetch these values into B->begv etc. */
522 fetch_buffer_markers (struct buffer
*b
)
524 if (! NILP (BVAR (b
, pt_marker
)))
528 eassert (!NILP (BVAR (b
, begv_marker
)));
529 eassert (!NILP (BVAR (b
, zv_marker
)));
531 m
= BVAR (b
, pt_marker
);
532 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
534 m
= BVAR (b
, begv_marker
);
535 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
537 m
= BVAR (b
, zv_marker
);
538 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
543 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
545 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
546 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
547 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
548 NAME should be a string which is not the name of an existing buffer.
549 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
550 such as major and minor modes, in the indirect buffer.
551 CLONE nil means the indirect buffer's state is reset to default values. */)
552 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
554 Lisp_Object buf
, tem
;
558 buf
= Fget_buffer (name
);
560 error ("Buffer name `%s' is in use", SDATA (name
));
563 base_buffer
= Fget_buffer (base_buffer
);
564 if (NILP (base_buffer
))
565 error ("No such buffer: `%s'", SDATA (tem
));
566 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
567 error ("Base buffer has been killed");
569 if (SCHARS (name
) == 0)
570 error ("Empty string for buffer name is not allowed");
572 b
= allocate_buffer ();
574 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
575 ? XBUFFER (base_buffer
)->base_buffer
576 : XBUFFER (base_buffer
));
578 /* Use the base buffer's text object. */
579 b
->text
= b
->base_buffer
->text
;
581 b
->pt
= b
->base_buffer
->pt
;
582 b
->begv
= b
->base_buffer
->begv
;
583 b
->zv
= b
->base_buffer
->zv
;
584 b
->pt_byte
= b
->base_buffer
->pt_byte
;
585 b
->begv_byte
= b
->base_buffer
->begv_byte
;
586 b
->zv_byte
= b
->base_buffer
->zv_byte
;
588 b
->newline_cache
= 0;
589 b
->width_run_cache
= 0;
590 BVAR (b
, width_table
) = Qnil
;
592 /* Put this on the chain of all buffers including killed ones. */
593 b
->header
.next
.buffer
= all_buffers
;
596 name
= Fcopy_sequence (name
);
597 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
598 BVAR (b
, name
) = name
;
601 reset_buffer_local_variables (b
, 1);
603 /* Put this in the alist of all live buffers. */
605 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
607 BVAR (b
, mark
) = Fmake_marker ();
609 /* The multibyte status belongs to the base buffer. */
610 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
612 /* Make sure the base buffer has markers for its narrowing. */
613 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
615 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
616 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
618 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
619 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
621 b
->base_buffer
->pt_byte
);
623 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
624 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
625 b
->base_buffer
->begv
,
626 b
->base_buffer
->begv_byte
);
628 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
629 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
631 b
->base_buffer
->zv_byte
);
632 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
637 /* Give the indirect buffer markers for its narrowing. */
638 BVAR (b
, pt_marker
) = Fmake_marker ();
639 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
640 BVAR (b
, begv_marker
) = Fmake_marker ();
641 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
642 BVAR (b
, zv_marker
) = Fmake_marker ();
643 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
644 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
648 struct buffer
*old_b
= current_buffer
;
650 clone_per_buffer_values (b
->base_buffer
, b
);
651 BVAR (b
, filename
) = Qnil
;
652 BVAR (b
, file_truename
) = Qnil
;
653 BVAR (b
, display_count
) = make_number (0);
654 BVAR (b
, backed_up
) = Qnil
;
655 BVAR (b
, auto_save_file_name
) = Qnil
;
656 set_buffer_internal_1 (b
);
657 Fset (intern ("buffer-save-without-query"), Qnil
);
658 Fset (intern ("buffer-file-number"), Qnil
);
659 Fset (intern ("buffer-stale-function"), Qnil
);
660 set_buffer_internal_1 (old_b
);
663 /* Run buffer-list-update-hook. */
664 if (!NILP (Vrun_hooks
))
665 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
671 delete_all_overlays (struct buffer
*b
)
675 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
676 have to empty the list, otherwise we end up with overlays that
677 think they belong to this buffer while the buffer doesn't know about
679 while (b
->overlays_before
)
681 XSETMISC (overlay
, b
->overlays_before
);
682 Fdelete_overlay (overlay
);
684 while (b
->overlays_after
)
686 XSETMISC (overlay
, b
->overlays_after
);
687 Fdelete_overlay (overlay
);
689 eassert (b
->overlays_before
== NULL
);
690 eassert (b
->overlays_after
== NULL
);
693 /* Reinitialize everything about a buffer except its name and contents
695 If called on an already-initialized buffer, the list of overlays
696 should be deleted before calling this function, otherwise we end up
697 with overlays that claim to belong to the buffer but the buffer
698 claims it doesn't belong to it. */
701 reset_buffer (register struct buffer
*b
)
703 BVAR (b
, filename
) = Qnil
;
704 BVAR (b
, file_truename
) = Qnil
;
705 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
706 EMACS_SET_SECS_NSECS (b
->modtime
, 0, UNKNOWN_MODTIME_NSECS
);
707 b
->modtime_size
= -1;
708 XSETFASTINT (BVAR (b
, save_length
), 0);
709 b
->last_window_start
= 1;
710 /* It is more conservative to start out "changed" than "unchanged". */
712 b
->prevent_redisplay_optimizations_p
= 1;
713 BVAR (b
, backed_up
) = Qnil
;
714 BUF_AUTOSAVE_MODIFF (b
) = 0;
715 b
->auto_save_failure_time
= 0;
716 BVAR (b
, auto_save_file_name
) = Qnil
;
717 BVAR (b
, read_only
) = Qnil
;
718 b
->overlays_before
= NULL
;
719 b
->overlays_after
= NULL
;
720 b
->overlay_center
= BEG
;
721 BVAR (b
, mark_active
) = Qnil
;
722 BVAR (b
, point_before_scroll
) = Qnil
;
723 BVAR (b
, file_format
) = Qnil
;
724 BVAR (b
, auto_save_file_format
) = Qt
;
725 BVAR (b
, last_selected_window
) = Qnil
;
726 XSETINT (BVAR (b
, display_count
), 0);
727 BVAR (b
, display_time
) = Qnil
;
728 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
729 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
730 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
732 b
->display_error_modiff
= 0;
735 /* Reset buffer B's local variables info.
736 Don't use this on a buffer that has already been in use;
737 it does not treat permanent locals consistently.
738 Instead, use Fkill_all_local_variables.
740 If PERMANENT_TOO is 1, then we reset permanent
741 buffer-local variables. If PERMANENT_TOO is 0,
742 we preserve those. */
745 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
750 /* Reset the major mode to Fundamental, together with all the
751 things that depend on the major mode.
752 default-major-mode is handled at a higher level.
753 We ignore it here. */
754 BVAR (b
, major_mode
) = Qfundamental_mode
;
755 BVAR (b
, keymap
) = Qnil
;
756 BVAR (b
, mode_name
) = QSFundamental
;
757 BVAR (b
, minor_modes
) = Qnil
;
759 /* If the standard case table has been altered and invalidated,
760 fix up its insides first. */
761 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
762 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
763 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
764 Fset_standard_case_table (Vascii_downcase_table
);
766 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
767 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
768 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
769 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
770 BVAR (b
, invisibility_spec
) = Qt
;
772 /* Reset all (or most) per-buffer variables to their defaults. */
774 BVAR (b
, local_var_alist
) = Qnil
;
777 Lisp_Object tmp
, prop
, last
= Qnil
;
778 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
779 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
781 /* If permanent-local, keep it. */
783 if (EQ (prop
, Qpermanent_local_hook
))
785 /* This is a partially permanent hook variable.
786 Preserve only the elements that want to be preserved. */
787 Lisp_Object list
, newlist
;
788 list
= XCDR (XCAR (tmp
));
792 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
794 Lisp_Object elt
= XCAR (list
);
795 /* Preserve element ELT if it's t,
796 if it is a function with a `permanent-local-hook' property,
797 or if it's not a symbol. */
800 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
801 newlist
= Fcons (elt
, newlist
);
803 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
806 /* Delete this local variable. */
807 else if (NILP (last
))
808 BVAR (b
, local_var_alist
) = XCDR (tmp
);
810 XSETCDR (last
, XCDR (tmp
));
813 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
814 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
815 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
817 /* For each slot that has a default value, copy that into the slot. */
818 for_each_per_buffer_object_at (offset
)
820 int idx
= PER_BUFFER_IDX (offset
);
823 || buffer_permanent_local_flags
[idx
] == 0)))
824 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
828 /* We split this away from generate-new-buffer, because rename-buffer
829 and set-visited-file-name ought to be able to use this to really
830 rename the buffer properly. */
832 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
833 Sgenerate_new_buffer_name
, 1, 2, 0,
834 doc
: /* Return a string that is the name of no existing buffer based on NAME.
835 If there is no live buffer named NAME, then return NAME.
836 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
837 \(starting at 2) until an unused name is found, and then return that name.
838 Optional second argument IGNORE specifies a name that is okay to use (if
839 it is in the sequence to be tried) even if a buffer with that name exists.
841 If NAME begins with a space (i.e., a buffer that is not normally
842 visible to users), then if buffer NAME already exists a random number
843 is first appended to NAME, to speed up finding a non-existent buffer. */)
844 (register Lisp_Object name
, Lisp_Object ignore
)
846 register Lisp_Object gentemp
, tem
, tem2
;
848 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
852 tem
= Fstring_equal (name
, ignore
);
855 tem
= Fget_buffer (name
);
859 if (!strncmp (SSDATA (name
), " ", 1)) /* see bug#1229 */
861 /* Note fileio.c:make_temp_name does random differently. */
862 sprintf (number
, "-%"pI
"d", XFASTINT (Frandom (make_number (999999))));
863 tem2
= concat2 (name
, build_string (number
));
864 tem
= Fget_buffer (tem2
);
874 sprintf (number
, "<%"pD
"d>", ++count
);
875 gentemp
= concat2 (tem2
, build_string (number
));
876 tem
= Fstring_equal (gentemp
, ignore
);
879 tem
= Fget_buffer (gentemp
);
886 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
887 doc
: /* Return the name of BUFFER, as a string.
888 BUFFER defaults to the current buffer.
889 Return nil if BUFFER has been killed. */)
890 (register Lisp_Object buffer
)
893 return BVAR (current_buffer
, name
);
894 CHECK_BUFFER (buffer
);
895 return BVAR (XBUFFER (buffer
), name
);
898 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
899 doc
: /* Return name of file BUFFER is visiting, or nil if none.
900 No argument or nil as argument means use the current buffer. */)
901 (register Lisp_Object buffer
)
904 return BVAR (current_buffer
, filename
);
905 CHECK_BUFFER (buffer
);
906 return BVAR (XBUFFER (buffer
), filename
);
909 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
911 doc
: /* Return the base buffer of indirect buffer BUFFER.
912 If BUFFER is not indirect, return nil.
913 BUFFER defaults to the current buffer. */)
914 (register Lisp_Object buffer
)
917 Lisp_Object base_buffer
;
920 base
= current_buffer
->base_buffer
;
923 CHECK_BUFFER (buffer
);
924 base
= XBUFFER (buffer
)->base_buffer
;
929 XSETBUFFER (base_buffer
, base
);
933 DEFUN ("buffer-local-value", Fbuffer_local_value
,
934 Sbuffer_local_value
, 2, 2, 0,
935 doc
: /* Return the value of VARIABLE in BUFFER.
936 If VARIABLE does not have a buffer-local binding in BUFFER, the value
937 is the default binding of the variable. */)
938 (register Lisp_Object variable
, register Lisp_Object buffer
)
940 register Lisp_Object result
= buffer_local_value_1 (variable
, buffer
);
942 if (EQ (result
, Qunbound
))
943 xsignal1 (Qvoid_variable
, variable
);
949 /* Like Fbuffer_local_value, but return Qunbound if the variable is
953 buffer_local_value_1 (Lisp_Object variable
, Lisp_Object buffer
)
955 register struct buffer
*buf
;
956 register Lisp_Object result
;
957 struct Lisp_Symbol
*sym
;
959 CHECK_SYMBOL (variable
);
960 CHECK_BUFFER (buffer
);
961 buf
= XBUFFER (buffer
);
962 sym
= XSYMBOL (variable
);
965 switch (sym
->redirect
)
967 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
968 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
969 case SYMBOL_LOCALIZED
:
970 { /* Look in local_var_alist. */
971 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
972 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
973 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
977 { /* What binding is loaded right now? */
978 Lisp_Object current_alist_element
= blv
->valcell
;
980 /* The value of the currently loaded binding is not
981 stored in it, but rather in the realvalue slot.
982 Store that value into the binding it belongs to
983 in case that is the one we are about to use. */
985 XSETCDR (current_alist_element
,
986 do_symval_forwarding (blv
->fwd
));
988 /* Now get the (perhaps updated) value out of the binding. */
989 result
= XCDR (result
);
992 result
= Fdefault_value (variable
);
995 case SYMBOL_FORWARDED
:
997 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
998 if (BUFFER_OBJFWDP (fwd
))
999 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
1001 result
= Fdefault_value (variable
);
1010 /* Return an alist of the Lisp-level buffer-local bindings of
1011 buffer BUF. That is, don't include the variables maintained
1012 in special slots in the buffer object. */
1015 buffer_lisp_local_variables (struct buffer
*buf
)
1017 Lisp_Object result
= Qnil
;
1018 register Lisp_Object tail
;
1019 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1021 Lisp_Object val
, elt
;
1025 /* Reference each variable in the alist in buf.
1026 If inquiring about the current buffer, this gets the current values,
1027 so store them into the alist so the alist is up to date.
1028 If inquiring about some other buffer, this swaps out any values
1029 for that buffer, making the alist up to date automatically. */
1030 val
= find_symbol_value (XCAR (elt
));
1031 /* Use the current buffer value only if buf is the current buffer. */
1032 if (buf
!= current_buffer
)
1035 result
= Fcons (EQ (val
, Qunbound
)
1037 : Fcons (XCAR (elt
), val
),
1044 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1045 Sbuffer_local_variables
, 0, 1, 0,
1046 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1047 Most elements look like (SYMBOL . VALUE), describing one variable.
1048 For a symbol that is locally unbound, just the symbol appears in the value.
1049 Note that storing new VALUEs in these elements doesn't change the variables.
1050 No argument or nil as argument means use current buffer as BUFFER. */)
1051 (register Lisp_Object buffer
)
1053 register struct buffer
*buf
;
1054 register Lisp_Object result
;
1057 buf
= current_buffer
;
1060 CHECK_BUFFER (buffer
);
1061 buf
= XBUFFER (buffer
);
1064 result
= buffer_lisp_local_variables (buf
);
1066 /* Add on all the variables stored in special slots. */
1070 for_each_per_buffer_object_at (offset
)
1072 idx
= PER_BUFFER_IDX (offset
);
1073 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1074 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1076 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1077 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1078 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1087 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1089 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1090 No argument or nil as argument means use current buffer as BUFFER. */)
1091 (register Lisp_Object buffer
)
1093 register struct buffer
*buf
;
1095 buf
= current_buffer
;
1098 CHECK_BUFFER (buffer
);
1099 buf
= XBUFFER (buffer
);
1102 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1105 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1107 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1108 A non-nil FLAG means mark the buffer modified. */)
1109 (register Lisp_Object flag
)
1111 register int already
;
1112 register Lisp_Object fn
;
1113 Lisp_Object buffer
, window
;
1115 #ifdef CLASH_DETECTION
1116 /* If buffer becoming modified, lock the file.
1117 If buffer becoming unmodified, unlock the file. */
1119 fn
= BVAR (current_buffer
, file_truename
);
1120 /* Test buffer-file-name so that binding it to nil is effective. */
1121 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1123 already
= SAVE_MODIFF
< MODIFF
;
1124 if (!already
&& !NILP (flag
))
1126 else if (already
&& NILP (flag
))
1129 #endif /* CLASH_DETECTION */
1131 /* Here we have a problem. SAVE_MODIFF is used here to encode
1132 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1133 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1134 modify SAVE_MODIFF to affect one, we may affect the other
1136 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1137 if SAVE_MODIFF<auto_save_modified that means we risk changing
1138 recent-auto-save-p from t to nil.
1139 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1140 we risk changing recent-auto-save-p from nil to t. */
1141 SAVE_MODIFF
= (NILP (flag
)
1142 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1144 /* Let's try to preserve recent-auto-save-p. */
1145 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1146 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1147 we can either decrease SAVE_MODIFF and auto_save_modified
1148 or increase MODIFF. */
1151 /* Set update_mode_lines only if buffer is displayed in some window.
1152 Packages like jit-lock or lazy-lock preserve a buffer's modified
1153 state by recording/restoring the state around blocks of code.
1154 Setting update_mode_lines makes redisplay consider all windows
1155 (on all frames). Stealth fontification of buffers not displayed
1156 would incur additional redisplay costs if we'd set
1157 update_modes_lines unconditionally.
1159 Ideally, I think there should be another mechanism for fontifying
1160 buffers without "modifying" buffers, or redisplay should be
1161 smarter about updating the `*' in mode lines. --gerd */
1162 XSETBUFFER (buffer
, current_buffer
);
1163 window
= Fget_buffer_window (buffer
, Qt
);
1164 if (WINDOWP (window
))
1166 ++update_mode_lines
;
1167 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1173 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1174 Srestore_buffer_modified_p
, 1, 1, 0,
1175 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1176 It is not ensured that mode lines will be updated to show the modified
1177 state of the current buffer. Use with care. */)
1180 #ifdef CLASH_DETECTION
1183 /* If buffer becoming modified, lock the file.
1184 If buffer becoming unmodified, unlock the file. */
1186 fn
= BVAR (current_buffer
, file_truename
);
1187 /* Test buffer-file-name so that binding it to nil is effective. */
1188 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1190 int already
= SAVE_MODIFF
< MODIFF
;
1191 if (!already
&& !NILP (flag
))
1193 else if (already
&& NILP (flag
))
1196 #endif /* CLASH_DETECTION */
1198 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1202 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1204 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1205 Each buffer has a tick counter which is incremented each time the
1206 text in that buffer is changed. It wraps around occasionally.
1207 No argument or nil as argument means use current buffer as BUFFER. */)
1208 (register Lisp_Object buffer
)
1210 register struct buffer
*buf
;
1212 buf
= current_buffer
;
1215 CHECK_BUFFER (buffer
);
1216 buf
= XBUFFER (buffer
);
1219 return make_number (BUF_MODIFF (buf
));
1222 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1223 Sbuffer_chars_modified_tick
, 0, 1, 0,
1224 doc
: /* Return BUFFER's character-change tick counter.
1225 Each buffer has a character-change tick counter, which is set to the
1226 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1227 time text in that buffer is inserted or deleted. By comparing the
1228 values returned by two individual calls of `buffer-chars-modified-tick',
1229 you can tell whether a character change occurred in that buffer in
1230 between these calls. No argument or nil as argument means use current
1231 buffer as BUFFER. */)
1232 (register Lisp_Object buffer
)
1234 register struct buffer
*buf
;
1236 buf
= current_buffer
;
1239 CHECK_BUFFER (buffer
);
1240 buf
= XBUFFER (buffer
);
1243 return make_number (BUF_CHARS_MODIFF (buf
));
1246 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1247 "(list (read-string \"Rename buffer (to new name): \" \
1248 nil 'buffer-name-history (buffer-name (current-buffer))) \
1249 current-prefix-arg)",
1250 doc
: /* Change current buffer's name to NEWNAME (a string).
1251 If second arg UNIQUE is nil or omitted, it is an error if a
1252 buffer named NEWNAME already exists.
1253 If UNIQUE is non-nil, come up with a new name using
1254 `generate-new-buffer-name'.
1255 Interactively, you can set UNIQUE with a prefix argument.
1256 We return the name we actually gave the buffer.
1257 This does not change the name of the visited file (if any). */)
1258 (register Lisp_Object newname
, Lisp_Object unique
)
1260 register Lisp_Object tem
, buf
;
1262 CHECK_STRING (newname
);
1264 if (SCHARS (newname
) == 0)
1265 error ("Empty string is invalid as a buffer name");
1267 tem
= Fget_buffer (newname
);
1270 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1271 rename the buffer automatically so you can create another
1272 with the original name. It makes UNIQUE equivalent to
1273 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1274 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1275 return BVAR (current_buffer
, name
);
1277 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1279 error ("Buffer name `%s' is in use", SDATA (newname
));
1282 BVAR (current_buffer
, name
) = newname
;
1284 /* Catch redisplay's attention. Unless we do this, the mode lines for
1285 any windows displaying current_buffer will stay unchanged. */
1286 update_mode_lines
++;
1288 XSETBUFFER (buf
, current_buffer
);
1289 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1290 if (NILP (BVAR (current_buffer
, filename
))
1291 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1292 call0 (intern ("rename-auto-save-file"));
1294 /* Run buffer-list-update-hook. */
1295 if (!NILP (Vrun_hooks
))
1296 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1298 /* Refetch since that last call may have done GC. */
1299 return BVAR (current_buffer
, name
);
1302 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1303 doc
: /* Return most recently selected buffer other than BUFFER.
1304 Buffers not visible in windows are preferred to visible buffers, unless
1305 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1306 BUFFER unless it denotes a live buffer. If the optional third argument
1307 FRAME is non-nil, use that frame's buffer list instead of the selected
1308 frame's buffer list.
1310 The buffer is found by scanning the selected or specified frame's buffer
1311 list first, followed by the list of all buffers. If no other buffer
1312 exists, return the buffer `*scratch*' (creating it if necessary). */)
1313 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1315 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1316 Lisp_Object tail
, buf
, pred
;
1317 Lisp_Object notsogood
= Qnil
;
1320 frame
= selected_frame
;
1322 CHECK_FRAME (frame
);
1324 pred
= frame_buffer_predicate (frame
);
1325 /* Consider buffers that have been seen in the frame first. */
1326 tail
= XFRAME (frame
)->buffer_list
;
1327 for (; CONSP (tail
); tail
= XCDR (tail
))
1330 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1331 && !NILP (BVAR (XBUFFER (buf
), name
))
1332 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1333 /* If the frame has a buffer_predicate, disregard buffers that
1334 don't fit the predicate. */
1335 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1337 if (!NILP (visible_ok
)
1338 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1340 else if (NILP (notsogood
))
1345 /* Consider alist of all buffers next. */
1346 tail
= Vbuffer_alist
;
1347 for (; CONSP (tail
); tail
= XCDR (tail
))
1349 buf
= Fcdr (XCAR (tail
));
1350 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1351 && !NILP (BVAR (XBUFFER (buf
), name
))
1352 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1353 /* If the frame has a buffer_predicate, disregard buffers that
1354 don't fit the predicate. */
1355 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1357 if (!NILP (visible_ok
)
1358 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1360 else if (NILP (notsogood
))
1365 if (!NILP (notsogood
))
1369 buf
= Fget_buffer (build_string ("*scratch*"));
1372 buf
= Fget_buffer_create (build_string ("*scratch*"));
1373 Fset_buffer_major_mode (buf
);
1379 /* The following function is a safe variant of Fother_buffer: It doesn't
1380 pay attention to any frame-local buffer lists, doesn't care about
1381 visibility of buffers, and doesn't evaluate any frame predicates. */
1384 other_buffer_safely (Lisp_Object buffer
)
1386 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1387 Lisp_Object tail
, buf
;
1389 tail
= Vbuffer_alist
;
1390 for (; CONSP (tail
); tail
= XCDR (tail
))
1392 buf
= Fcdr (XCAR (tail
));
1393 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1394 && !NILP (BVAR (XBUFFER (buf
), name
))
1395 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1399 buf
= Fget_buffer (build_string ("*scratch*"));
1402 buf
= Fget_buffer_create (build_string ("*scratch*"));
1403 Fset_buffer_major_mode (buf
);
1409 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1411 doc
: /* Start keeping undo information for buffer BUFFER.
1412 No argument or nil as argument means do this for the current buffer. */)
1413 (register Lisp_Object buffer
)
1415 Lisp_Object real_buffer
;
1418 XSETBUFFER (real_buffer
, current_buffer
);
1421 real_buffer
= Fget_buffer (buffer
);
1422 if (NILP (real_buffer
))
1426 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1427 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1433 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1434 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1435 The buffer being killed will be current while the hook is running.\n\
1437 Functions run by this hook are supposed to not change the current
1438 buffer. See `kill-buffer'."
1440 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1441 doc
: /* Kill the buffer specified by BUFFER-OR-NAME.
1442 The argument may be a buffer or the name of an existing buffer.
1443 Argument nil or omitted means kill the current buffer. Return t if the
1444 buffer is actually killed, nil otherwise.
1446 The functions in `kill-buffer-query-functions' are called with the
1447 buffer to be killed as the current buffer. If any of them returns nil,
1448 the buffer is not killed. The hook `kill-buffer-hook' is run before the
1449 buffer is actually killed. The buffer being killed will be current
1450 while the hook is running. Functions called by any of these hooks are
1451 supposed to not change the current buffer.
1453 Any processes that have this buffer as the `process-buffer' are killed
1454 with SIGHUP. This function calls `replace-buffer-in-windows' for
1455 cleaning up all windows currently displaying the buffer to be killed. */)
1456 (Lisp_Object buffer_or_name
)
1459 register struct buffer
*b
;
1460 register Lisp_Object tem
;
1461 register struct Lisp_Marker
*m
;
1462 struct gcpro gcpro1
;
1464 if (NILP (buffer_or_name
))
1465 buffer
= Fcurrent_buffer ();
1467 buffer
= Fget_buffer (buffer_or_name
);
1469 nsberror (buffer_or_name
);
1471 b
= XBUFFER (buffer
);
1473 /* Avoid trouble for buffer already dead. */
1474 if (NILP (BVAR (b
, name
)))
1477 /* Query if the buffer is still modified. */
1478 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1479 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1482 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1483 BVAR (b
, name
), make_number (0)));
1489 /* Run hooks with the buffer to be killed the current buffer. */
1491 ptrdiff_t count
= SPECPDL_INDEX ();
1492 Lisp_Object arglist
[1];
1494 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1495 set_buffer_internal (b
);
1497 /* First run the query functions; if any query is answered no,
1498 don't kill the buffer. */
1499 arglist
[0] = Qkill_buffer_query_functions
;
1500 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1502 return unbind_to (count
, Qnil
);
1504 /* Then run the hooks. */
1505 Frun_hooks (1, &Qkill_buffer_hook
);
1506 unbind_to (count
, Qnil
);
1509 /* If the hooks have killed the buffer, exit now. */
1510 if (NILP (BVAR (b
, name
)))
1513 /* We have no more questions to ask. Verify that it is valid
1514 to kill the buffer. This must be done after the questions
1515 since anything can happen within do_yes_or_no_p. */
1517 /* Don't kill the minibuffer now current. */
1518 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1521 /* When we kill a base buffer, kill all its indirect buffers.
1522 We do it at this stage so nothing terrible happens if they
1523 ask questions or their hooks get errors. */
1524 if (! b
->base_buffer
)
1526 struct buffer
*other
;
1530 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1531 /* all_buffers contains dead buffers too;
1532 don't re-kill them. */
1533 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1536 XSETBUFFER (buf
, other
);
1542 /* Exit if we now have killed the base buffer (Bug#11665). */
1543 if (NILP (BVAR (b
, name
)))
1547 /* Run replace_buffer_in_windows before making another buffer current
1548 since set-window-buffer-start-and-point will refuse to make another
1549 buffer current if the selected window does not show the current
1550 buffer. (Bug#10114) */
1551 replace_buffer_in_windows (buffer
);
1553 /* Exit if replacing the buffer in windows has killed our buffer. */
1554 if (NILP (BVAR (b
, name
)))
1557 /* Make this buffer not be current. Exit if it is the sole visible
1559 if (b
== current_buffer
)
1561 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1563 if (b
== current_buffer
)
1567 /* If the buffer now current is shown in the minibuffer and our buffer
1568 is the sole other buffer give up. */
1569 XSETBUFFER (tem
, current_buffer
);
1570 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
)
1571 && EQ (buffer
, Fother_buffer (buffer
, Qnil
, Qnil
)))
1574 /* Now there is no question: we can kill the buffer. */
1576 #ifdef CLASH_DETECTION
1577 /* Unlock this buffer's file, if it is locked. */
1579 #endif /* CLASH_DETECTION */
1582 kill_buffer_processes (buffer
);
1585 /* Killing buffer processes may run sentinels which may have killed
1587 if (NILP (BVAR (b
, name
)))
1590 /* These may run Lisp code and into infinite loops (if someone
1591 insisted on circular lists) so allow quitting here. */
1592 frames_discard_buffer (buffer
);
1594 clear_charpos_cache (b
);
1596 tem
= Vinhibit_quit
;
1598 /* Remove the buffer from the list of all buffers. */
1599 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1600 /* If replace_buffer_in_windows didn't do its job fix that now. */
1601 replace_buffer_in_windows_safely (buffer
);
1602 Vinhibit_quit
= tem
;
1604 /* Delete any auto-save file, if we saved it in this session.
1605 But not if the buffer is modified. */
1606 if (STRINGP (BVAR (b
, auto_save_file_name
))
1607 && BUF_AUTOSAVE_MODIFF (b
) != 0
1608 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1609 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1610 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1613 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1614 if (! NILP (delete))
1615 internal_delete_file (BVAR (b
, auto_save_file_name
));
1618 /* Deleting an auto-save file could have killed our buffer. */
1619 if (NILP (BVAR (b
, name
)))
1624 /* Unchain all markers that belong to this indirect buffer.
1625 Don't unchain the markers that belong to the base buffer
1626 or its other indirect buffers. */
1627 for (m
= BUF_MARKERS (b
); m
; )
1629 struct Lisp_Marker
*next
= m
->next
;
1637 /* Unchain all markers of this buffer and its indirect buffers.
1638 and leave them pointing nowhere. */
1639 for (m
= BUF_MARKERS (b
); m
; )
1641 struct Lisp_Marker
*next
= m
->next
;
1646 BUF_MARKERS (b
) = NULL
;
1647 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1649 /* Perhaps we should explicitly free the interval tree here... */
1652 /* Reset the local variables, so that this buffer's local values
1653 won't be protected from GC. They would be protected
1654 if they happened to remain cached in their symbols.
1655 This gets rid of them for certain. */
1656 swap_out_buffer_local_variables (b
);
1657 reset_buffer_local_variables (b
, 1);
1659 BVAR (b
, name
) = Qnil
;
1662 if (! b
->base_buffer
)
1663 free_buffer_text (b
);
1665 if (b
->newline_cache
)
1667 free_region_cache (b
->newline_cache
);
1668 b
->newline_cache
= 0;
1670 if (b
->width_run_cache
)
1672 free_region_cache (b
->width_run_cache
);
1673 b
->width_run_cache
= 0;
1675 BVAR (b
, width_table
) = Qnil
;
1677 BVAR (b
, undo_list
) = Qnil
;
1679 /* Run buffer-list-update-hook. */
1680 if (!NILP (Vrun_hooks
))
1681 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1686 /* Move association for BUFFER to the front of buffer (a)lists. Since
1687 we do this each time BUFFER is selected visibly, the more recently
1688 selected buffers are always closer to the front of those lists. This
1689 means that other_buffer is more likely to choose a relevant buffer.
1691 Note that this moves BUFFER to the front of the buffer lists of the
1692 selected frame even if BUFFER is not shown there. If BUFFER is not
1693 shown in the selected frame, consider the present behavior a feature.
1694 `select-window' gets this right since it shows BUFFER in the selected
1695 window when calling us. */
1698 record_buffer (Lisp_Object buffer
)
1700 Lisp_Object aelt
, aelt_cons
, tem
;
1701 register struct frame
*f
= XFRAME (selected_frame
);
1703 CHECK_BUFFER (buffer
);
1705 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1706 Don't allow quitting since this might leave the buffer list in an
1707 inconsistent state. */
1708 tem
= Vinhibit_quit
;
1710 aelt
= Frassq (buffer
, Vbuffer_alist
);
1711 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1712 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1713 XSETCDR (aelt_cons
, Vbuffer_alist
);
1714 Vbuffer_alist
= aelt_cons
;
1715 Vinhibit_quit
= tem
;
1717 /* Update buffer list of selected frame. */
1718 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1719 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1721 /* Run buffer-list-update-hook. */
1722 if (!NILP (Vrun_hooks
))
1723 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1727 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1728 buffer is killed. For the selected frame's buffer list this moves
1729 BUFFER to its end even if it was never shown in that frame. If
1730 this happens we have a feature, hence `bury-buffer-internal' should be
1731 called only when BUFFER was shown in the selected frame. */
1733 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1735 doc
: /* Move BUFFER to the end of the buffer list. */)
1736 (Lisp_Object buffer
)
1738 Lisp_Object aelt
, aelt_cons
, tem
;
1739 register struct frame
*f
= XFRAME (selected_frame
);
1741 CHECK_BUFFER (buffer
);
1743 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1744 Don't allow quitting since this might leave the buffer list in an
1745 inconsistent state. */
1746 tem
= Vinhibit_quit
;
1748 aelt
= Frassq (buffer
, Vbuffer_alist
);
1749 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1750 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1751 XSETCDR (aelt_cons
, Qnil
);
1752 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1753 Vinhibit_quit
= tem
;
1755 /* Update buffer lists of selected frame. */
1756 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1757 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1759 /* Run buffer-list-update-hook. */
1760 if (!NILP (Vrun_hooks
))
1761 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1766 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1767 doc
: /* Set an appropriate major mode for BUFFER.
1768 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1769 according to `default-major-mode'.
1770 Use this function before selecting the buffer, since it may need to inspect
1771 the current buffer's major mode. */)
1772 (Lisp_Object buffer
)
1775 Lisp_Object function
;
1777 CHECK_BUFFER (buffer
);
1779 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1780 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1781 function
= find_symbol_value (intern ("initial-major-mode"));
1784 function
= BVAR (&buffer_defaults
, major_mode
);
1786 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1787 function
= BVAR (current_buffer
, major_mode
);
1790 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1793 count
= SPECPDL_INDEX ();
1795 /* To select a nonfundamental mode,
1796 select the buffer temporarily and then call the mode function. */
1798 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1800 Fset_buffer (buffer
);
1803 return unbind_to (count
, Qnil
);
1806 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1807 doc
: /* Return the current buffer as a Lisp object. */)
1810 register Lisp_Object buf
;
1811 XSETBUFFER (buf
, current_buffer
);
1815 /* Set the current buffer to B.
1817 We previously set windows_or_buffers_changed here to invalidate
1818 global unchanged information in beg_unchanged and end_unchanged.
1819 This is no longer necessary because we now compute unchanged
1820 information on a buffer-basis. Every action affecting other
1821 windows than the selected one requires a select_window at some
1822 time, and that increments windows_or_buffers_changed. */
1825 set_buffer_internal (register struct buffer
*b
)
1827 if (current_buffer
!= b
)
1828 set_buffer_internal_1 (b
);
1831 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1832 This is used by redisplay. */
1835 set_buffer_internal_1 (register struct buffer
*b
)
1837 register struct buffer
*old_buf
;
1838 register Lisp_Object tail
;
1840 #ifdef USE_MMAP_FOR_BUFFERS
1841 if (b
->text
->beg
== NULL
)
1842 enlarge_buffer_text (b
, 0);
1843 #endif /* USE_MMAP_FOR_BUFFERS */
1845 if (current_buffer
== b
)
1848 old_buf
= current_buffer
;
1850 last_known_column_point
= -1; /* invalidate indentation cache */
1854 /* Put the undo list back in the base buffer, so that it appears
1855 that an indirect buffer shares the undo list of its base. */
1856 if (old_buf
->base_buffer
)
1857 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1859 /* If the old current buffer has markers to record PT, BEGV and ZV
1860 when it is not current, update them now. */
1861 record_buffer_markers (old_buf
);
1864 /* Get the undo list from the base buffer, so that it appears
1865 that an indirect buffer shares the undo list of its base. */
1867 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1869 /* If the new current buffer has markers to record PT, BEGV and ZV
1870 when it is not current, fetch them now. */
1871 fetch_buffer_markers (b
);
1873 /* Look down buffer's list of local Lisp variables
1874 to find and update any that forward into C variables. */
1878 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1880 Lisp_Object var
= XCAR (XCAR (tail
));
1881 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1882 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1883 && SYMBOL_BLV (sym
)->fwd
)
1884 /* Just reference the variable
1885 to cause it to become set for this buffer. */
1886 Fsymbol_value (var
);
1889 /* Do the same with any others that were local to the previous buffer */
1890 while (b
!= old_buf
&& (b
= old_buf
, b
));
1893 /* Switch to buffer B temporarily for redisplay purposes.
1894 This avoids certain things that don't need to be done within redisplay. */
1897 set_buffer_temp (struct buffer
*b
)
1899 register struct buffer
*old_buf
;
1901 if (current_buffer
== b
)
1904 old_buf
= current_buffer
;
1907 /* If the old current buffer has markers to record PT, BEGV and ZV
1908 when it is not current, update them now. */
1909 record_buffer_markers (old_buf
);
1911 /* If the new current buffer has markers to record PT, BEGV and ZV
1912 when it is not current, fetch them now. */
1913 fetch_buffer_markers (b
);
1916 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1917 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1918 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1919 also `save-excursion' when you want to make a buffer current
1920 temporarily. This function does not display the buffer, so its effect
1921 ends when the current command terminates. Use `switch-to-buffer' or
1922 `pop-to-buffer' to switch buffers permanently. */)
1923 (register Lisp_Object buffer_or_name
)
1925 register Lisp_Object buffer
;
1926 buffer
= Fget_buffer (buffer_or_name
);
1928 nsberror (buffer_or_name
);
1929 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1930 error ("Selecting deleted buffer");
1931 set_buffer_internal (XBUFFER (buffer
));
1935 /* Set the current buffer to BUFFER provided it is alive. */
1938 set_buffer_if_live (Lisp_Object buffer
)
1940 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1941 Fset_buffer (buffer
);
1945 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1946 Sbarf_if_buffer_read_only
, 0, 0, 0,
1947 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1950 if (!NILP (BVAR (current_buffer
, read_only
))
1951 && NILP (Vinhibit_read_only
))
1952 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1956 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1957 doc
: /* Delete the entire contents of the current buffer.
1958 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1959 so the buffer is truly empty after this. */)
1966 current_buffer
->last_window_start
= 1;
1967 /* Prevent warnings, or suspension of auto saving, that would happen
1968 if future size is less than past size. Use of erase-buffer
1969 implies that the future text is not really related to the past text. */
1970 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1975 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1977 CHECK_NUMBER_COERCE_MARKER (*b
);
1978 CHECK_NUMBER_COERCE_MARKER (*e
);
1980 if (XINT (*b
) > XINT (*e
))
1983 tem
= *b
; *b
= *e
; *e
= tem
;
1986 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
1987 args_out_of_range (*b
, *e
);
1990 /* Advance BYTE_POS up to a character boundary
1991 and return the adjusted position. */
1994 advance_to_char_boundary (ptrdiff_t byte_pos
)
1998 if (byte_pos
== BEG
)
1999 /* Beginning of buffer is always a character boundary. */
2002 c
= FETCH_BYTE (byte_pos
);
2003 if (! CHAR_HEAD_P (c
))
2005 /* We should advance BYTE_POS only when C is a constituent of a
2006 multibyte sequence. */
2007 ptrdiff_t orig_byte_pos
= byte_pos
;
2012 c
= FETCH_BYTE (byte_pos
);
2014 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2016 if (byte_pos
< orig_byte_pos
)
2017 byte_pos
= orig_byte_pos
;
2018 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2019 surely advance to the correct character boundary. If C is
2020 not, BYTE_POS was unchanged. */
2026 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2028 doc
: /* Swap the text between current buffer and BUFFER. */)
2029 (Lisp_Object buffer
)
2031 struct buffer
*other_buffer
;
2032 CHECK_BUFFER (buffer
);
2033 other_buffer
= XBUFFER (buffer
);
2035 if (NILP (BVAR (other_buffer
, name
)))
2036 error ("Cannot swap a dead buffer's text");
2038 /* Actually, it probably works just fine.
2039 * if (other_buffer == current_buffer)
2040 * error ("Cannot swap a buffer's text with itself"); */
2042 /* Actually, this may be workable as well, tho probably only if they're
2044 if (other_buffer
->base_buffer
2045 || current_buffer
->base_buffer
)
2046 error ("Cannot swap indirect buffers's text");
2048 { /* This is probably harder to make work. */
2049 struct buffer
*other
;
2050 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2051 if (other
->base_buffer
== other_buffer
2052 || other
->base_buffer
== current_buffer
)
2053 error ("One of the buffers to swap has indirect buffers");
2056 #define swapfield(field, type) \
2058 type tmp##field = other_buffer->field; \
2059 other_buffer->field = current_buffer->field; \
2060 current_buffer->field = tmp##field; \
2062 #define swapfield_(field, type) \
2064 type tmp##field = BVAR (other_buffer, field); \
2065 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2066 BVAR (current_buffer, field) = tmp##field; \
2069 swapfield (own_text
, struct buffer_text
);
2070 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2071 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2073 r_alloc_reset_variable ((void **) ¤t_buffer
->own_text
.beg
,
2074 (void **) &other_buffer
->own_text
.beg
);
2075 r_alloc_reset_variable ((void **) &other_buffer
->own_text
.beg
,
2076 (void **) ¤t_buffer
->own_text
.beg
);
2077 #endif /* REL_ALLOC */
2079 swapfield (pt
, ptrdiff_t);
2080 swapfield (pt_byte
, ptrdiff_t);
2081 swapfield (begv
, ptrdiff_t);
2082 swapfield (begv_byte
, ptrdiff_t);
2083 swapfield (zv
, ptrdiff_t);
2084 swapfield (zv_byte
, ptrdiff_t);
2085 eassert (!current_buffer
->base_buffer
);
2086 eassert (!other_buffer
->base_buffer
);
2087 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2088 swapfield (newline_cache
, struct region_cache
*);
2089 swapfield (width_run_cache
, struct region_cache
*);
2090 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2091 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2092 swapfield (overlays_before
, struct Lisp_Overlay
*);
2093 swapfield (overlays_after
, struct Lisp_Overlay
*);
2094 swapfield (overlay_center
, ptrdiff_t);
2095 swapfield_ (undo_list
, Lisp_Object
);
2096 swapfield_ (mark
, Lisp_Object
);
2097 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2098 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2099 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2100 /* FIXME: Not sure what we should do with these *_marker fields.
2101 Hopefully they're just nil anyway. */
2102 swapfield_ (pt_marker
, Lisp_Object
);
2103 swapfield_ (begv_marker
, Lisp_Object
);
2104 swapfield_ (zv_marker
, Lisp_Object
);
2105 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2106 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2108 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2109 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2110 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2111 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2112 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2113 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2114 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2116 struct Lisp_Marker
*m
;
2117 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2118 if (m
->buffer
== other_buffer
)
2119 m
->buffer
= current_buffer
;
2121 /* Since there's no indirect buffer in sight, markers on
2122 BUF_MARKERS(buf) should either be for `buf' or dead. */
2123 eassert (!m
->buffer
);
2124 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2125 if (m
->buffer
== current_buffer
)
2126 m
->buffer
= other_buffer
;
2128 /* Since there's no indirect buffer in sight, markers on
2129 BUF_MARKERS(buf) should either be for `buf' or dead. */
2130 eassert (!m
->buffer
);
2132 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2133 So since we just swapped the markers between the two buffers, we need
2134 to undo the effect of this swap for window markers. */
2135 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2136 Lisp_Object buf1
, buf2
;
2137 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2139 while (NILP (Fmemq (w
, ws
)))
2142 if (MARKERP (XWINDOW (w
)->pointm
)
2143 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2144 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2145 Fset_marker (XWINDOW (w
)->pointm
,
2146 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2147 XWINDOW (w
)->buffer
);
2148 w
= Fnext_window (w
, Qt
, Qt
);
2152 if (current_buffer
->text
->intervals
)
2153 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2154 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2155 if (other_buffer
->text
->intervals
)
2156 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2157 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2162 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2164 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2165 If FLAG is t, this makes the buffer a multibyte buffer.
2166 If FLAG is nil, this makes the buffer a single-byte buffer.
2167 In these cases, the buffer contents remain unchanged as a sequence of
2168 bytes but the contents viewed as characters do change.
2169 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2170 all eight-bit bytes to eight-bit characters.
2171 If the multibyte flag was really changed, undo information of the
2172 current buffer is cleared. */)
2175 struct Lisp_Marker
*tail
, *markers
;
2176 struct buffer
*other
;
2178 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2179 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2180 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2181 struct gcpro gcpro1
;
2183 if (current_buffer
->base_buffer
)
2184 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2186 /* Do nothing if nothing actually changes. */
2187 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2192 /* Don't record these buffer changes. We will put a special undo entry
2194 BVAR (current_buffer
, undo_list
) = Qt
;
2196 /* If the cached position is for this buffer, clear it out. */
2197 clear_charpos_cache (current_buffer
);
2200 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2202 begv
= BEGV
, zv
= ZV
;
2209 ptrdiff_t pos
, stop
;
2212 /* Do this first, so it can use CHAR_TO_BYTE
2213 to calculate the old correspondences. */
2214 set_intervals_multibyte (0);
2216 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2222 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2225 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2226 tail
->charpos
= tail
->bytepos
;
2228 /* Convert multibyte form of 8-bit characters to unibyte. */
2243 if (ASCII_BYTE_P (*p
))
2245 else if (CHAR_BYTE8_HEAD_P (*p
))
2247 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2248 /* Delete all bytes for this 8-bit character but the
2249 last one, and change the last one to the character
2252 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2264 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2265 p
+= bytes
, pos
+= bytes
;
2269 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2274 ptrdiff_t pos
, stop
;
2275 unsigned char *p
, *pend
;
2277 /* Be sure not to have a multibyte sequence striding over the GAP.
2278 Ex: We change this: "...abc\302 _GAP_ \241def..."
2279 to: "...abc _GAP_ \302\241def..." */
2282 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2283 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2285 unsigned char *q
= GPT_ADDR
- 1;
2287 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2288 if (LEADING_CODE_P (*q
))
2290 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2292 move_gap_both (new_gpt
, new_gpt
);
2296 /* Make the buffer contents valid as multibyte by converting
2297 8-bit characters to multibyte form. */
2315 if (ASCII_BYTE_P (*p
))
2317 else if (EQ (flag
, Qt
)
2318 && ! CHAR_BYTE8_HEAD_P (*p
)
2319 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2320 p
+= bytes
, pos
+= bytes
;
2323 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2326 c
= BYTE8_TO_CHAR (*p
);
2327 bytes
= CHAR_STRING (c
, tmp
);
2329 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2331 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2332 /* Now the gap is after the just inserted data. */
2350 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2352 /* Do this first, so that chars_in_text asks the right question.
2353 set_intervals_multibyte needs it too. */
2354 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2356 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2357 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2359 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2361 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2362 if (BEGV_BYTE
> GPT_BYTE
)
2363 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2365 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2367 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2368 if (ZV_BYTE
> GPT_BYTE
)
2369 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2371 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2374 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2377 if (byte
> GPT_BYTE
)
2378 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2380 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2381 TEMP_SET_PT_BOTH (position
, byte
);
2384 tail
= markers
= BUF_MARKERS (current_buffer
);
2386 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2387 getting confused by the markers that have not yet been updated.
2388 It is also a signal that it should never create a marker. */
2389 BUF_MARKERS (current_buffer
) = NULL
;
2391 for (; tail
; tail
= tail
->next
)
2393 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2394 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2397 /* Make sure no markers were put on the chain
2398 while the chain value was incorrect. */
2399 if (BUF_MARKERS (current_buffer
))
2402 BUF_MARKERS (current_buffer
) = markers
;
2404 /* Do this last, so it can calculate the new correspondences
2405 between chars and bytes. */
2406 set_intervals_multibyte (1);
2409 if (!EQ (old_undo
, Qt
))
2411 /* Represent all the above changes by a special undo entry. */
2412 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2413 intern ("set-buffer-multibyte"),
2414 NILP (flag
) ? Qt
: Qnil
),
2420 /* Changing the multibyteness of a buffer means that all windows
2421 showing that buffer must be updated thoroughly. */
2422 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2423 ++windows_or_buffers_changed
;
2425 /* Copy this buffer's new multibyte status
2426 into all of its indirect buffers. */
2427 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2428 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2430 BVAR (other
, enable_multibyte_characters
)
2431 = BVAR (current_buffer
, enable_multibyte_characters
);
2432 other
->prevent_redisplay_optimizations_p
= 1;
2435 /* Restore the modifiedness of the buffer. */
2436 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2437 Fset_buffer_modified_p (Qnil
);
2439 /* Update coding systems of this buffer's process (if any). */
2441 Lisp_Object process
;
2443 process
= Fget_buffer_process (Fcurrent_buffer ());
2444 if (PROCESSP (process
))
2445 setup_process_coding_systems (process
);
2451 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2452 Skill_all_local_variables
, 0, 0, 0,
2453 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2454 Most local variable bindings are eliminated so that the default values
2455 become effective once more. Also, the syntax table is set from
2456 `standard-syntax-table', the local keymap is set to nil,
2457 and the abbrev table from `fundamental-mode-abbrev-table'.
2458 This function also forces redisplay of the mode line.
2460 Every function to select a new major mode starts by
2461 calling this function.
2463 As a special exception, local variables whose names have
2464 a non-nil `permanent-local' property are not eliminated by this function.
2466 The first thing this function does is run
2467 the normal hook `change-major-mode-hook'. */)
2470 Frun_hooks (1, &Qchange_major_mode_hook
);
2472 /* Make sure none of the bindings in local_var_alist
2473 remain swapped in, in their symbols. */
2475 swap_out_buffer_local_variables (current_buffer
);
2477 /* Actually eliminate all local bindings of this buffer. */
2479 reset_buffer_local_variables (current_buffer
, 0);
2481 /* Force mode-line redisplay. Useful here because all major mode
2482 commands call this function. */
2483 update_mode_lines
++;
2488 /* Make sure no local variables remain set up with buffer B
2489 for their current values. */
2492 swap_out_buffer_local_variables (struct buffer
*b
)
2494 Lisp_Object oalist
, alist
, buffer
;
2496 XSETBUFFER (buffer
, b
);
2497 oalist
= BVAR (b
, local_var_alist
);
2499 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2501 Lisp_Object sym
= XCAR (XCAR (alist
));
2502 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2503 /* Need not do anything if some other buffer's binding is
2505 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2507 /* Symbol is set up for this buffer's old local value:
2509 swap_in_global_binding (XSYMBOL (sym
));
2514 /* Find all the overlays in the current buffer that contain position POS.
2515 Return the number found, and store them in a vector in *VEC_PTR.
2516 Store in *LEN_PTR the size allocated for the vector.
2517 Store in *NEXT_PTR the next position after POS where an overlay starts,
2518 or ZV if there are no more overlays between POS and ZV.
2519 Store in *PREV_PTR the previous position before POS where an overlay ends,
2520 or where an overlay starts which ends at or after POS;
2521 or BEGV if there are no such overlays from BEGV to POS.
2522 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2524 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2525 when this function is called.
2527 If EXTEND is non-zero, we make the vector bigger if necessary.
2528 If EXTEND is zero, we never extend the vector,
2529 and we store only as many overlays as will fit.
2530 But we still return the total number of overlays.
2532 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2533 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2534 default (BEGV or ZV). */
2537 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2539 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2541 Lisp_Object overlay
, start
, end
;
2542 struct Lisp_Overlay
*tail
;
2544 ptrdiff_t len
= *len_ptr
;
2545 Lisp_Object
*vec
= *vec_ptr
;
2546 ptrdiff_t next
= ZV
;
2547 ptrdiff_t prev
= BEGV
;
2548 int inhibit_storing
= 0;
2550 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2552 ptrdiff_t startpos
, endpos
;
2554 XSETMISC (overlay
, tail
);
2556 start
= OVERLAY_START (overlay
);
2557 end
= OVERLAY_END (overlay
);
2558 endpos
= OVERLAY_POSITION (end
);
2565 startpos
= OVERLAY_POSITION (start
);
2566 /* This one ends at or after POS
2567 so its start counts for PREV_PTR if it's before POS. */
2568 if (prev
< startpos
&& startpos
< pos
)
2572 if (startpos
<= pos
)
2576 /* The supplied vector is full.
2577 Either make it bigger, or don't store any more in it. */
2580 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2586 inhibit_storing
= 1;
2589 if (!inhibit_storing
)
2591 /* Keep counting overlays even if we can't return them all. */
2594 else if (startpos
< next
)
2598 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2600 ptrdiff_t startpos
, endpos
;
2602 XSETMISC (overlay
, tail
);
2604 start
= OVERLAY_START (overlay
);
2605 end
= OVERLAY_END (overlay
);
2606 startpos
= OVERLAY_POSITION (start
);
2609 if (startpos
< next
)
2613 endpos
= OVERLAY_POSITION (end
);
2620 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2626 inhibit_storing
= 1;
2629 if (!inhibit_storing
)
2633 if (startpos
< pos
&& startpos
> prev
)
2636 else if (endpos
< pos
&& endpos
> prev
)
2638 else if (endpos
== pos
&& startpos
> prev
2639 && (!change_req
|| startpos
< pos
))
2650 /* Find all the overlays in the current buffer that overlap the range
2651 BEG-END, or are empty at BEG, or are empty at END provided END
2652 denotes the position at the end of the current buffer.
2654 Return the number found, and store them in a vector in *VEC_PTR.
2655 Store in *LEN_PTR the size allocated for the vector.
2656 Store in *NEXT_PTR the next position after POS where an overlay starts,
2657 or ZV if there are no more overlays.
2658 Store in *PREV_PTR the previous position before POS where an overlay ends,
2659 or BEGV if there are no previous overlays.
2660 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2662 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2663 when this function is called.
2665 If EXTEND is non-zero, we make the vector bigger if necessary.
2666 If EXTEND is zero, we never extend the vector,
2667 and we store only as many overlays as will fit.
2668 But we still return the total number of overlays. */
2671 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2672 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2673 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2675 Lisp_Object overlay
, ostart
, oend
;
2676 struct Lisp_Overlay
*tail
;
2678 ptrdiff_t len
= *len_ptr
;
2679 Lisp_Object
*vec
= *vec_ptr
;
2680 ptrdiff_t next
= ZV
;
2681 ptrdiff_t prev
= BEGV
;
2682 int inhibit_storing
= 0;
2683 int end_is_Z
= end
== Z
;
2685 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2687 ptrdiff_t startpos
, endpos
;
2689 XSETMISC (overlay
, tail
);
2691 ostart
= OVERLAY_START (overlay
);
2692 oend
= OVERLAY_END (overlay
);
2693 endpos
= OVERLAY_POSITION (oend
);
2700 startpos
= OVERLAY_POSITION (ostart
);
2701 /* Count an interval if it overlaps the range, is empty at the
2702 start of the range, or is empty at END provided END denotes the
2703 end of the buffer. */
2704 if ((beg
< endpos
&& startpos
< end
)
2705 || (startpos
== endpos
2706 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2710 /* The supplied vector is full.
2711 Either make it bigger, or don't store any more in it. */
2714 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2720 inhibit_storing
= 1;
2723 if (!inhibit_storing
)
2725 /* Keep counting overlays even if we can't return them all. */
2728 else if (startpos
< next
)
2732 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2734 ptrdiff_t startpos
, endpos
;
2736 XSETMISC (overlay
, tail
);
2738 ostart
= OVERLAY_START (overlay
);
2739 oend
= OVERLAY_END (overlay
);
2740 startpos
= OVERLAY_POSITION (ostart
);
2743 if (startpos
< next
)
2747 endpos
= OVERLAY_POSITION (oend
);
2748 /* Count an interval if it overlaps the range, is empty at the
2749 start of the range, or is empty at END provided END denotes the
2750 end of the buffer. */
2751 if ((beg
< endpos
&& startpos
< end
)
2752 || (startpos
== endpos
2753 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2759 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2765 inhibit_storing
= 1;
2768 if (!inhibit_storing
)
2772 else if (endpos
< beg
&& endpos
> prev
)
2784 /* Return non-zero if there exists an overlay with a non-nil
2785 `mouse-face' property overlapping OVERLAY. */
2788 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2790 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2791 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2792 ptrdiff_t n
, i
, size
;
2793 Lisp_Object
*v
, tem
;
2796 v
= alloca (size
* sizeof *v
);
2797 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2800 v
= alloca (n
* sizeof *v
);
2801 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2804 for (i
= 0; i
< n
; ++i
)
2805 if (!EQ (v
[i
], overlay
)
2806 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2815 /* Fast function to just test if we're at an overlay boundary. */
2817 overlay_touches_p (ptrdiff_t pos
)
2819 Lisp_Object overlay
;
2820 struct Lisp_Overlay
*tail
;
2822 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2826 XSETMISC (overlay
,tail
);
2827 if (!OVERLAYP (overlay
))
2830 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2833 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2837 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2841 XSETMISC (overlay
, tail
);
2842 if (!OVERLAYP (overlay
))
2845 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2848 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2856 Lisp_Object overlay
;
2862 compare_overlays (const void *v1
, const void *v2
)
2864 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2865 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2866 if (s1
->priority
!= s2
->priority
)
2867 return s1
->priority
< s2
->priority
? -1 : 1;
2868 if (s1
->beg
!= s2
->beg
)
2869 return s1
->beg
< s2
->beg
? -1 : 1;
2870 if (s1
->end
!= s2
->end
)
2871 return s2
->end
< s1
->end
? -1 : 1;
2872 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2873 between "equal" overlays. The result can still change between
2874 invocations of Emacs, but it won't change in the middle of
2875 `find_field' (bug#6830). */
2876 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2877 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2881 /* Sort an array of overlays by priority. The array is modified in place.
2882 The return value is the new size; this may be smaller than the original
2883 size if some of the overlays were invalid or were window-specific. */
2885 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2888 struct sortvec
*sortvec
= alloca (noverlays
* sizeof *sortvec
);
2890 /* Put the valid and relevant overlays into sortvec. */
2892 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2895 Lisp_Object overlay
;
2897 overlay
= overlay_vec
[i
];
2898 if (OVERLAY_VALID (overlay
)
2899 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2900 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2902 /* If we're interested in a specific window, then ignore
2903 overlays that are limited to some other window. */
2908 window
= Foverlay_get (overlay
, Qwindow
);
2909 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2913 /* This overlay is good and counts: put it into sortvec. */
2914 sortvec
[j
].overlay
= overlay
;
2915 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2916 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2917 tem
= Foverlay_get (overlay
, Qpriority
);
2919 sortvec
[j
].priority
= XINT (tem
);
2921 sortvec
[j
].priority
= 0;
2927 /* Sort the overlays into the proper order: increasing priority. */
2930 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2932 for (i
= 0; i
< noverlays
; i
++)
2933 overlay_vec
[i
] = sortvec
[i
].overlay
;
2939 Lisp_Object string
, string2
;
2946 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2947 ptrdiff_t size
; /* Allocated length of that array. */
2948 ptrdiff_t used
; /* How much of the array is currently in use. */
2949 ptrdiff_t bytes
; /* Total length of the strings in buf. */
2952 /* Buffers for storing information about the overlays touching a given
2953 position. These could be automatic variables in overlay_strings, but
2954 it's more efficient to hold onto the memory instead of repeatedly
2955 allocating and freeing it. */
2956 static struct sortstrlist overlay_heads
, overlay_tails
;
2957 static unsigned char *overlay_str_buf
;
2959 /* Allocated length of overlay_str_buf. */
2960 static ptrdiff_t overlay_str_len
;
2962 /* A comparison function suitable for passing to qsort. */
2964 cmp_for_strings (const void *as1
, const void *as2
)
2966 struct sortstr
*s1
= (struct sortstr
*)as1
;
2967 struct sortstr
*s2
= (struct sortstr
*)as2
;
2968 if (s1
->size
!= s2
->size
)
2969 return s2
->size
< s1
->size
? -1 : 1;
2970 if (s1
->priority
!= s2
->priority
)
2971 return s1
->priority
< s2
->priority
? -1 : 1;
2976 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2977 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2981 if (ssl
->used
== ssl
->size
)
2982 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
2983 ssl
->buf
[ssl
->used
].string
= str
;
2984 ssl
->buf
[ssl
->used
].string2
= str2
;
2985 ssl
->buf
[ssl
->used
].size
= size
;
2986 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2989 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2990 nbytes
= SCHARS (str
);
2991 else if (! STRING_MULTIBYTE (str
))
2992 nbytes
= count_size_as_multibyte (SDATA (str
),
2995 nbytes
= SBYTES (str
);
2997 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2998 memory_full (SIZE_MAX
);
2999 ssl
->bytes
+= nbytes
;
3003 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3004 nbytes
= SCHARS (str2
);
3005 else if (! STRING_MULTIBYTE (str2
))
3006 nbytes
= count_size_as_multibyte (SDATA (str2
),
3009 nbytes
= SBYTES (str2
);
3011 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3012 memory_full (SIZE_MAX
);
3013 ssl
->bytes
+= nbytes
;
3017 /* Return the concatenation of the strings associated with overlays that
3018 begin or end at POS, ignoring overlays that are specific to a window
3019 other than W. The strings are concatenated in the appropriate order:
3020 shorter overlays nest inside longer ones, and higher priority inside
3021 lower. Normally all of the after-strings come first, but zero-sized
3022 overlays have their after-strings ride along with the before-strings
3023 because it would look strange to print them inside-out.
3025 Returns the string length, and stores the contents indirectly through
3026 PSTR, if that variable is non-null. The string may be overwritten by
3027 subsequent calls. */
3030 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3032 Lisp_Object overlay
, window
, str
;
3033 struct Lisp_Overlay
*ov
;
3034 ptrdiff_t startpos
, endpos
;
3035 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3037 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3038 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3039 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3041 XSETMISC (overlay
, ov
);
3042 eassert (OVERLAYP (overlay
));
3044 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3045 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3048 if (endpos
!= pos
&& startpos
!= pos
)
3050 window
= Foverlay_get (overlay
, Qwindow
);
3051 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3054 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3055 record_overlay_string (&overlay_heads
, str
,
3057 ? Foverlay_get (overlay
, Qafter_string
)
3059 Foverlay_get (overlay
, Qpriority
),
3061 else if (endpos
== pos
3062 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3063 record_overlay_string (&overlay_tails
, str
, Qnil
,
3064 Foverlay_get (overlay
, Qpriority
),
3067 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3069 XSETMISC (overlay
, ov
);
3070 eassert (OVERLAYP (overlay
));
3072 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3073 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3076 if (endpos
!= pos
&& startpos
!= pos
)
3078 window
= Foverlay_get (overlay
, Qwindow
);
3079 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3082 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3083 record_overlay_string (&overlay_heads
, str
,
3085 ? Foverlay_get (overlay
, Qafter_string
)
3087 Foverlay_get (overlay
, Qpriority
),
3089 else if (endpos
== pos
3090 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3091 record_overlay_string (&overlay_tails
, str
, Qnil
,
3092 Foverlay_get (overlay
, Qpriority
),
3095 if (overlay_tails
.used
> 1)
3096 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3098 if (overlay_heads
.used
> 1)
3099 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3101 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3108 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3109 memory_full (SIZE_MAX
);
3110 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3111 if (total
> overlay_str_len
)
3112 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3113 total
- overlay_str_len
, -1, 1);
3115 p
= overlay_str_buf
;
3116 for (i
= overlay_tails
.used
; --i
>= 0;)
3119 tem
= overlay_tails
.buf
[i
].string
;
3120 nbytes
= copy_text (SDATA (tem
), p
,
3122 STRING_MULTIBYTE (tem
), multibyte
);
3125 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3128 tem
= overlay_heads
.buf
[i
].string
;
3129 nbytes
= copy_text (SDATA (tem
), p
,
3131 STRING_MULTIBYTE (tem
), multibyte
);
3133 tem
= overlay_heads
.buf
[i
].string2
;
3136 nbytes
= copy_text (SDATA (tem
), p
,
3138 STRING_MULTIBYTE (tem
), multibyte
);
3142 if (p
!= overlay_str_buf
+ total
)
3145 *pstr
= overlay_str_buf
;
3151 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3154 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3156 Lisp_Object overlay
, beg
, end
;
3157 struct Lisp_Overlay
*prev
, *tail
, *next
;
3159 /* See if anything in overlays_before should move to overlays_after. */
3161 /* We don't strictly need prev in this loop; it should always be nil.
3162 But we use it for symmetry and in case that should cease to be true
3163 with some future change. */
3165 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3168 XSETMISC (overlay
, tail
);
3170 /* If the overlay is not valid, get rid of it. */
3171 if (!OVERLAY_VALID (overlay
))
3176 /* Splice the cons cell TAIL out of overlays_before. */
3180 buf
->overlays_before
= next
;
3186 beg
= OVERLAY_START (overlay
);
3187 end
= OVERLAY_END (overlay
);
3189 if (OVERLAY_POSITION (end
) > pos
)
3191 /* OVERLAY needs to be moved. */
3192 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3193 struct Lisp_Overlay
*other
, *other_prev
;
3195 /* Splice the cons cell TAIL out of overlays_before. */
3199 buf
->overlays_before
= next
;
3201 /* Search thru overlays_after for where to put it. */
3203 for (other
= buf
->overlays_after
; other
;
3204 other_prev
= other
, other
= other
->next
)
3206 Lisp_Object otherbeg
, otheroverlay
;
3208 XSETMISC (otheroverlay
, other
);
3209 eassert (OVERLAY_VALID (otheroverlay
));
3211 otherbeg
= OVERLAY_START (otheroverlay
);
3212 if (OVERLAY_POSITION (otherbeg
) >= where
)
3216 /* Add TAIL to overlays_after before OTHER. */
3219 other_prev
->next
= tail
;
3221 buf
->overlays_after
= tail
;
3225 /* We've reached the things that should stay in overlays_before.
3226 All the rest of overlays_before must end even earlier,
3231 /* See if anything in overlays_after should be in overlays_before. */
3233 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3236 XSETMISC (overlay
, tail
);
3238 /* If the overlay is not valid, get rid of it. */
3239 if (!OVERLAY_VALID (overlay
))
3244 /* Splice the cons cell TAIL out of overlays_after. */
3248 buf
->overlays_after
= next
;
3254 beg
= OVERLAY_START (overlay
);
3255 end
= OVERLAY_END (overlay
);
3257 /* Stop looking, when we know that nothing further
3258 can possibly end before POS. */
3259 if (OVERLAY_POSITION (beg
) > pos
)
3262 if (OVERLAY_POSITION (end
) <= pos
)
3264 /* OVERLAY needs to be moved. */
3265 ptrdiff_t where
= OVERLAY_POSITION (end
);
3266 struct Lisp_Overlay
*other
, *other_prev
;
3268 /* Splice the cons cell TAIL out of overlays_after. */
3272 buf
->overlays_after
= next
;
3274 /* Search thru overlays_before for where to put it. */
3276 for (other
= buf
->overlays_before
; other
;
3277 other_prev
= other
, other
= other
->next
)
3279 Lisp_Object otherend
, otheroverlay
;
3281 XSETMISC (otheroverlay
, other
);
3282 eassert (OVERLAY_VALID (otheroverlay
));
3284 otherend
= OVERLAY_END (otheroverlay
);
3285 if (OVERLAY_POSITION (otherend
) <= where
)
3289 /* Add TAIL to overlays_before before OTHER. */
3292 other_prev
->next
= tail
;
3294 buf
->overlays_before
= tail
;
3299 buf
->overlay_center
= pos
;
3303 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3305 /* After an insertion, the lists are still sorted properly,
3306 but we may need to update the value of the overlay center. */
3307 if (current_buffer
->overlay_center
>= pos
)
3308 current_buffer
->overlay_center
+= length
;
3312 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3314 if (current_buffer
->overlay_center
< pos
)
3315 /* The deletion was to our right. No change needed; the before- and
3316 after-lists are still consistent. */
3318 else if (current_buffer
->overlay_center
- pos
> length
)
3319 /* The deletion was to our left. We need to adjust the center value
3320 to account for the change in position, but the lists are consistent
3321 given the new value. */
3322 current_buffer
->overlay_center
-= length
;
3324 /* We're right in the middle. There might be things on the after-list
3325 that now belong on the before-list. Recentering will move them,
3326 and also update the center point. */
3327 recenter_overlay_lists (current_buffer
, pos
);
3330 /* Fix up overlays that were garbled as a result of permuting markers
3331 in the range START through END. Any overlay with at least one
3332 endpoint in this range will need to be unlinked from the overlay
3333 list and reinserted in its proper place.
3334 Such an overlay might even have negative size at this point.
3335 If so, we'll make the overlay empty. */
3337 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3339 Lisp_Object overlay
;
3340 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3341 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3342 /* These are either nil, indicating that before_list or after_list
3343 should be assigned, or the cons cell the cdr of which should be
3345 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3346 /* 'Parent', likewise, indicates a cons cell or
3347 current_buffer->overlays_before or overlays_after, depending
3348 which loop we're in. */
3349 struct Lisp_Overlay
*tail
, *parent
;
3350 ptrdiff_t startpos
, endpos
;
3352 /* This algorithm shifts links around instead of consing and GCing.
3353 The loop invariant is that before_list (resp. after_list) is a
3354 well-formed list except that its last element, the CDR of beforep
3355 (resp. afterp) if beforep (afterp) isn't nil or before_list
3356 (after_list) if it is, is still uninitialized. So it's not a bug
3357 that before_list isn't initialized, although it may look
3359 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3361 XSETMISC (overlay
, tail
);
3363 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3364 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3366 /* If the overlay is backwards, make it empty. */
3367 if (endpos
< startpos
)
3370 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3378 || (startpos
>= start
&& startpos
< end
))
3380 /* Add it to the end of the wrong list. Later on,
3381 recenter_overlay_lists will move it to the right place. */
3382 if (endpos
< current_buffer
->overlay_center
)
3387 afterp
->next
= tail
;
3395 beforep
->next
= tail
;
3399 current_buffer
->overlays_before
= tail
->next
;
3401 parent
->next
= tail
->next
;
3405 parent
= tail
, tail
= parent
->next
;
3407 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3409 XSETMISC (overlay
, tail
);
3411 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3412 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3414 /* If the overlay is backwards, make it empty. */
3415 if (endpos
< startpos
)
3418 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3422 if (startpos
>= end
)
3425 if (startpos
>= start
3426 || (endpos
>= start
&& endpos
< end
))
3428 if (endpos
< current_buffer
->overlay_center
)
3433 afterp
->next
= tail
;
3441 beforep
->next
= tail
;
3445 current_buffer
->overlays_after
= tail
->next
;
3447 parent
->next
= tail
->next
;
3451 parent
= tail
, tail
= parent
->next
;
3454 /* Splice the constructed (wrong) lists into the buffer's lists,
3455 and let the recenter function make it sane again. */
3458 beforep
->next
= current_buffer
->overlays_before
;
3459 current_buffer
->overlays_before
= before_list
;
3461 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3465 afterp
->next
= current_buffer
->overlays_after
;
3466 current_buffer
->overlays_after
= after_list
;
3468 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3471 /* We have two types of overlay: the one whose ending marker is
3472 after-insertion-marker (this is the usual case) and the one whose
3473 ending marker is before-insertion-marker. When `overlays_before'
3474 contains overlays of the latter type and the former type in this
3475 order and both overlays end at inserting position, inserting a text
3476 increases only the ending marker of the latter type, which results
3477 in incorrect ordering of `overlays_before'.
3479 This function fixes ordering of overlays in the slot
3480 `overlays_before' of the buffer *BP. Before the insertion, `point'
3481 was at PREV, and now is at POS. */
3484 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3486 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3487 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3489 ptrdiff_t end
IF_LINT (= 0);
3491 /* After the insertion, the several overlays may be in incorrect
3492 order. The possibility is that, in the list `overlays_before',
3493 an overlay which ends at POS appears after an overlay which ends
3494 at PREV. Since POS is greater than PREV, we must fix the
3495 ordering of these overlays, by moving overlays ends at POS before
3496 the overlays ends at PREV. */
3498 /* At first, find a place where disordered overlays should be linked
3499 in. It is where an overlay which end before POS exists. (i.e. an
3500 overlay whose ending marker is after-insertion-marker if disorder
3503 && (XSETMISC (tem
, tail
),
3504 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3510 /* If we don't find such an overlay,
3511 or the found one ends before PREV,
3512 or the found one is the last one in the list,
3513 we don't have to fix anything. */
3514 if (!tail
|| end
< prev
|| !tail
->next
)
3517 right_pair
= parent
;
3521 /* Now, end position of overlays in the list TAIL should be before
3522 or equal to PREV. In the loop, an overlay which ends at POS is
3523 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3524 we found an overlay which ends before PREV, the remaining
3525 overlays are in correct order. */
3528 XSETMISC (tem
, tail
);
3529 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3532 { /* This overlay is disordered. */
3533 struct Lisp_Overlay
*found
= tail
;
3535 /* Unlink the found overlay. */
3537 parent
->next
= tail
;
3538 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3539 and link it into the right place. */
3542 found
->next
= bp
->overlays_before
;
3543 bp
->overlays_before
= found
;
3547 found
->next
= right_pair
->next
;
3548 right_pair
->next
= found
;
3551 else if (end
== prev
)
3556 else /* No more disordered overlay. */
3561 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3562 doc
: /* Return t if OBJECT is an overlay. */)
3563 (Lisp_Object object
)
3565 return (OVERLAYP (object
) ? Qt
: Qnil
);
3568 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3569 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3570 If omitted, BUFFER defaults to the current buffer.
3571 BEG and END may be integers or markers.
3572 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3573 for the front of the overlay advance when text is inserted there
3574 \(which means the text *is not* included in the overlay).
3575 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3576 for the rear of the overlay advance when text is inserted there
3577 \(which means the text *is* included in the overlay). */)
3578 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3580 Lisp_Object overlay
;
3584 XSETBUFFER (buffer
, current_buffer
);
3586 CHECK_BUFFER (buffer
);
3588 && ! EQ (Fmarker_buffer (beg
), buffer
))
3589 error ("Marker points into wrong buffer");
3591 && ! EQ (Fmarker_buffer (end
), buffer
))
3592 error ("Marker points into wrong buffer");
3594 CHECK_NUMBER_COERCE_MARKER (beg
);
3595 CHECK_NUMBER_COERCE_MARKER (end
);
3597 if (XINT (beg
) > XINT (end
))
3600 temp
= beg
; beg
= end
; end
= temp
;
3603 b
= XBUFFER (buffer
);
3605 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3606 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3608 if (!NILP (front_advance
))
3609 XMARKER (beg
)->insertion_type
= 1;
3610 if (!NILP (rear_advance
))
3611 XMARKER (end
)->insertion_type
= 1;
3613 overlay
= allocate_misc ();
3614 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3615 XOVERLAY (overlay
)->start
= beg
;
3616 XOVERLAY (overlay
)->end
= end
;
3617 XOVERLAY (overlay
)->plist
= Qnil
;
3618 XOVERLAY (overlay
)->next
= NULL
;
3620 /* Put the new overlay on the wrong list. */
3621 end
= OVERLAY_END (overlay
);
3622 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3624 if (b
->overlays_after
)
3625 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3626 b
->overlays_after
= XOVERLAY (overlay
);
3630 if (b
->overlays_before
)
3631 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3632 b
->overlays_before
= XOVERLAY (overlay
);
3635 /* This puts it in the right list, and in the right order. */
3636 recenter_overlay_lists (b
, b
->overlay_center
);
3638 /* We don't need to redisplay the region covered by the overlay, because
3639 the overlay has no properties at the moment. */
3644 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3647 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3651 ptrdiff_t temp
= start
;
3656 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3658 /* If this is a buffer not in the selected window,
3659 we must do other windows. */
3660 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3661 windows_or_buffers_changed
= 1;
3662 /* If multiple windows show this buffer, we must do other windows. */
3663 else if (buffer_shared
> 1)
3664 windows_or_buffers_changed
= 1;
3665 /* If we modify an overlay at the end of the buffer, we cannot
3666 be sure that window end is still valid. */
3667 else if (end
>= ZV
&& start
<= ZV
)
3668 windows_or_buffers_changed
= 1;
3670 ++BUF_OVERLAY_MODIFF (buf
);
3674 static struct Lisp_Overlay
*
3675 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3677 struct Lisp_Overlay
*tmp
, *prev
;
3678 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3682 prev
->next
= tmp
->next
;
3685 overlay
->next
= NULL
;
3691 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3692 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3693 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3694 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3696 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3698 struct buffer
*b
, *ob
= 0;
3699 Lisp_Object obuffer
;
3700 ptrdiff_t count
= SPECPDL_INDEX ();
3701 ptrdiff_t n_beg
, n_end
, o_beg
IF_LINT (= 0), o_end
IF_LINT (= 0);
3703 CHECK_OVERLAY (overlay
);
3705 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3707 XSETBUFFER (buffer
, current_buffer
);
3708 CHECK_BUFFER (buffer
);
3710 if (NILP (Fbuffer_live_p (buffer
)))
3711 error ("Attempt to move overlay to a dead buffer");
3714 && ! EQ (Fmarker_buffer (beg
), buffer
))
3715 error ("Marker points into wrong buffer");
3717 && ! EQ (Fmarker_buffer (end
), buffer
))
3718 error ("Marker points into wrong buffer");
3720 CHECK_NUMBER_COERCE_MARKER (beg
);
3721 CHECK_NUMBER_COERCE_MARKER (end
);
3723 if (XINT (beg
) > XINT (end
))
3726 temp
= beg
; beg
= end
; end
= temp
;
3729 specbind (Qinhibit_quit
, Qt
);
3731 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3732 b
= XBUFFER (buffer
);
3734 if (!NILP (obuffer
))
3736 ob
= XBUFFER (obuffer
);
3738 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3739 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3741 ob
->overlays_before
=
3742 unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3743 ob
->overlays_after
=
3744 unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3745 eassert (XOVERLAY (overlay
)->next
== NULL
);
3748 /* Set the overlay boundaries, which may clip them. */
3749 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3750 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3752 n_beg
= marker_position (OVERLAY_START (overlay
));
3753 n_end
= marker_position (OVERLAY_END (overlay
));
3755 /* If the overlay has changed buffers, do a thorough redisplay. */
3756 if (!EQ (buffer
, obuffer
))
3758 /* Redisplay where the overlay was. */
3760 modify_overlay (ob
, o_beg
, o_end
);
3762 /* Redisplay where the overlay is going to be. */
3763 modify_overlay (b
, n_beg
, n_end
);
3766 /* Redisplay the area the overlay has just left, or just enclosed. */
3769 modify_overlay (b
, o_end
, n_end
);
3770 else if (o_end
== n_end
)
3771 modify_overlay (b
, o_beg
, n_beg
);
3773 modify_overlay (b
, min (o_beg
, n_beg
), max (o_end
, n_end
));
3776 /* Delete the overlay if it is empty after clipping and has the
3777 evaporate property. */
3778 if (n_beg
== n_end
&& !NILP (Foverlay_get (overlay
, Qevaporate
)))
3779 return unbind_to (count
, Fdelete_overlay (overlay
));
3781 /* Put the overlay into the new buffer's overlay lists, first on the
3783 if (n_end
< b
->overlay_center
)
3785 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3786 b
->overlays_after
= XOVERLAY (overlay
);
3790 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3791 b
->overlays_before
= XOVERLAY (overlay
);
3794 /* This puts it in the right list, and in the right order. */
3795 recenter_overlay_lists (b
, b
->overlay_center
);
3797 return unbind_to (count
, overlay
);
3800 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3801 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3802 (Lisp_Object overlay
)
3806 ptrdiff_t count
= SPECPDL_INDEX ();
3808 CHECK_OVERLAY (overlay
);
3810 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3814 b
= XBUFFER (buffer
);
3815 specbind (Qinhibit_quit
, Qt
);
3818 = unchain_overlay (b
->overlays_before
, XOVERLAY (overlay
));
3820 = unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3821 eassert (XOVERLAY (overlay
)->next
== NULL
);
3824 marker_position (OVERLAY_START (overlay
)),
3825 marker_position (OVERLAY_END (overlay
)));
3826 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3827 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3829 /* When deleting an overlay with before or after strings, turn off
3830 display optimizations for the affected buffer, on the basis that
3831 these strings may contain newlines. This is easier to do than to
3832 check for that situation during redisplay. */
3833 if (!windows_or_buffers_changed
3834 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3835 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3836 b
->prevent_redisplay_optimizations_p
= 1;
3838 return unbind_to (count
, Qnil
);
3841 /* Overlay dissection functions. */
3843 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3844 doc
: /* Return the position at which OVERLAY starts. */)
3845 (Lisp_Object overlay
)
3847 CHECK_OVERLAY (overlay
);
3849 return (Fmarker_position (OVERLAY_START (overlay
)));
3852 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3853 doc
: /* Return the position at which OVERLAY ends. */)
3854 (Lisp_Object overlay
)
3856 CHECK_OVERLAY (overlay
);
3858 return (Fmarker_position (OVERLAY_END (overlay
)));
3861 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3862 doc
: /* Return the buffer OVERLAY belongs to.
3863 Return nil if OVERLAY has been deleted. */)
3864 (Lisp_Object overlay
)
3866 CHECK_OVERLAY (overlay
);
3868 return Fmarker_buffer (OVERLAY_START (overlay
));
3871 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3872 doc
: /* Return a list of the properties on OVERLAY.
3873 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3875 (Lisp_Object overlay
)
3877 CHECK_OVERLAY (overlay
);
3879 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3883 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3884 doc
: /* Return a list of the overlays that contain the character at POS. */)
3887 ptrdiff_t len
, noverlays
;
3888 Lisp_Object
*overlay_vec
;
3891 CHECK_NUMBER_COERCE_MARKER (pos
);
3894 /* We can't use alloca here because overlays_at can call xrealloc. */
3895 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3897 /* Put all the overlays we want in a vector in overlay_vec.
3898 Store the length in len. */
3899 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3902 /* Make a list of them all. */
3903 result
= Flist (noverlays
, overlay_vec
);
3905 xfree (overlay_vec
);
3909 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3910 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3911 Overlap means that at least one character is contained within the overlay
3912 and also contained within the specified region.
3913 Empty overlays are included in the result if they are located at BEG,
3914 between BEG and END, or at END provided END denotes the position at the
3915 end of the buffer. */)
3916 (Lisp_Object beg
, Lisp_Object end
)
3918 ptrdiff_t len
, noverlays
;
3919 Lisp_Object
*overlay_vec
;
3922 CHECK_NUMBER_COERCE_MARKER (beg
);
3923 CHECK_NUMBER_COERCE_MARKER (end
);
3926 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3928 /* Put all the overlays we want in a vector in overlay_vec.
3929 Store the length in len. */
3930 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3933 /* Make a list of them all. */
3934 result
= Flist (noverlays
, overlay_vec
);
3936 xfree (overlay_vec
);
3940 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3942 doc
: /* Return the next position after POS where an overlay starts or ends.
3943 If there are no overlay boundaries from POS to (point-max),
3944 the value is (point-max). */)
3947 ptrdiff_t i
, len
, noverlays
;
3949 Lisp_Object
*overlay_vec
;
3951 CHECK_NUMBER_COERCE_MARKER (pos
);
3954 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3956 /* Put all the overlays we want in a vector in overlay_vec.
3957 Store the length in len.
3958 endpos gets the position where the next overlay starts. */
3959 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3962 /* If any of these overlays ends before endpos,
3963 use its ending point instead. */
3964 for (i
= 0; i
< noverlays
; i
++)
3969 oend
= OVERLAY_END (overlay_vec
[i
]);
3970 oendpos
= OVERLAY_POSITION (oend
);
3971 if (oendpos
< endpos
)
3975 xfree (overlay_vec
);
3976 return make_number (endpos
);
3979 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3980 Sprevious_overlay_change
, 1, 1, 0,
3981 doc
: /* Return the previous position before POS where an overlay starts or ends.
3982 If there are no overlay boundaries from (point-min) to POS,
3983 the value is (point-min). */)
3987 Lisp_Object
*overlay_vec
;
3990 CHECK_NUMBER_COERCE_MARKER (pos
);
3992 /* At beginning of buffer, we know the answer;
3993 avoid bug subtracting 1 below. */
3994 if (XINT (pos
) == BEGV
)
3998 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
4000 /* Put all the overlays we want in a vector in overlay_vec.
4001 Store the length in len.
4002 prevpos gets the position of the previous change. */
4003 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4006 xfree (overlay_vec
);
4007 return make_number (prevpos
);
4010 /* These functions are for debugging overlays. */
4012 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4013 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4014 The car has all the overlays before the overlay center;
4015 the cdr has all the overlays after the overlay center.
4016 Recentering overlays moves overlays between these lists.
4017 The lists you get are copies, so that changing them has no effect.
4018 However, the overlays you get are the real objects that the buffer uses. */)
4021 struct Lisp_Overlay
*ol
;
4022 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4023 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4026 before
= Fcons (tmp
, before
);
4028 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4031 after
= Fcons (tmp
, after
);
4033 return Fcons (Fnreverse (before
), Fnreverse (after
));
4036 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4037 doc
: /* Recenter the overlays of the current buffer around position POS.
4038 That makes overlay lookup faster for positions near POS (but perhaps slower
4039 for positions far away from POS). */)
4043 CHECK_NUMBER_COERCE_MARKER (pos
);
4045 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4046 recenter_overlay_lists (current_buffer
, p
);
4050 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4051 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4052 (Lisp_Object overlay
, Lisp_Object prop
)
4054 CHECK_OVERLAY (overlay
);
4055 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4058 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4059 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4060 VALUE will be returned.*/)
4061 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4063 Lisp_Object tail
, buffer
;
4066 CHECK_OVERLAY (overlay
);
4068 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4070 for (tail
= XOVERLAY (overlay
)->plist
;
4071 CONSP (tail
) && CONSP (XCDR (tail
));
4072 tail
= XCDR (XCDR (tail
)))
4073 if (EQ (XCAR (tail
), prop
))
4075 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4076 XSETCAR (XCDR (tail
), value
);
4079 /* It wasn't in the list, so add it to the front. */
4080 changed
= !NILP (value
);
4081 XOVERLAY (overlay
)->plist
4082 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4084 if (! NILP (buffer
))
4087 modify_overlay (XBUFFER (buffer
),
4088 marker_position (OVERLAY_START (overlay
)),
4089 marker_position (OVERLAY_END (overlay
)));
4090 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4091 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4092 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4093 Fdelete_overlay (overlay
);
4099 /* Subroutine of report_overlay_modification. */
4101 /* Lisp vector holding overlay hook functions to call.
4102 Vector elements come in pairs.
4103 Each even-index element is a list of hook functions.
4104 The following odd-index element is the overlay they came from.
4106 Before the buffer change, we fill in this vector
4107 as we call overlay hook functions.
4108 After the buffer change, we get the functions to call from this vector.
4109 This way we always call the same functions before and after the change. */
4110 static Lisp_Object last_overlay_modification_hooks
;
4112 /* Number of elements actually used in last_overlay_modification_hooks. */
4113 static ptrdiff_t last_overlay_modification_hooks_used
;
4115 /* Add one functionlist/overlay pair
4116 to the end of last_overlay_modification_hooks. */
4119 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4121 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4123 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4124 last_overlay_modification_hooks
=
4125 larger_vector (last_overlay_modification_hooks
, 2, -1);
4126 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4127 functionlist
); last_overlay_modification_hooks_used
++;
4128 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4129 overlay
); last_overlay_modification_hooks_used
++;
4132 /* Run the modification-hooks of overlays that include
4133 any part of the text in START to END.
4134 If this change is an insertion, also
4135 run the insert-before-hooks of overlay starting at END,
4136 and the insert-after-hooks of overlay ending at START.
4138 This is called both before and after the modification.
4139 AFTER is nonzero when we call after the modification.
4141 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4142 When AFTER is nonzero, they are the start position,
4143 the position after the inserted new text,
4144 and the length of deleted or replaced old text. */
4147 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4148 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4150 Lisp_Object prop
, overlay
;
4151 struct Lisp_Overlay
*tail
;
4152 /* 1 if this change is an insertion. */
4153 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4154 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4159 /* We used to run the functions as soon as we found them and only register
4160 them in last_overlay_modification_hooks for the purpose of the `after'
4161 case. But running elisp code as we traverse the list of overlays is
4162 painful because the list can be modified by the elisp code so we had to
4163 copy at several places. We now simply do a read-only traversal that
4164 only collects the functions to run and we run them afterwards. It's
4165 simpler, especially since all the code was already there. -stef */
4169 /* We are being called before a change.
4170 Scan the overlays to find the functions to call. */
4171 last_overlay_modification_hooks_used
= 0;
4172 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4174 ptrdiff_t startpos
, endpos
;
4175 Lisp_Object ostart
, oend
;
4177 XSETMISC (overlay
, tail
);
4179 ostart
= OVERLAY_START (overlay
);
4180 oend
= OVERLAY_END (overlay
);
4181 endpos
= OVERLAY_POSITION (oend
);
4182 if (XFASTINT (start
) > endpos
)
4184 startpos
= OVERLAY_POSITION (ostart
);
4185 if (insertion
&& (XFASTINT (start
) == startpos
4186 || XFASTINT (end
) == startpos
))
4188 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4190 add_overlay_mod_hooklist (prop
, overlay
);
4192 if (insertion
&& (XFASTINT (start
) == endpos
4193 || XFASTINT (end
) == endpos
))
4195 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4197 add_overlay_mod_hooklist (prop
, overlay
);
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
);
4205 add_overlay_mod_hooklist (prop
, overlay
);
4209 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4211 ptrdiff_t startpos
, endpos
;
4212 Lisp_Object ostart
, oend
;
4214 XSETMISC (overlay
, tail
);
4216 ostart
= OVERLAY_START (overlay
);
4217 oend
= OVERLAY_END (overlay
);
4218 startpos
= OVERLAY_POSITION (ostart
);
4219 endpos
= OVERLAY_POSITION (oend
);
4220 if (XFASTINT (end
) < startpos
)
4222 if (insertion
&& (XFASTINT (start
) == startpos
4223 || XFASTINT (end
) == startpos
))
4225 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4227 add_overlay_mod_hooklist (prop
, overlay
);
4229 if (insertion
&& (XFASTINT (start
) == endpos
4230 || XFASTINT (end
) == endpos
))
4232 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4234 add_overlay_mod_hooklist (prop
, overlay
);
4236 /* Test for intersecting intervals. This does the right thing
4237 for both insertion and deletion. */
4238 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4240 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4242 add_overlay_mod_hooklist (prop
, overlay
);
4247 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4249 /* Call the functions recorded in last_overlay_modification_hooks.
4250 First copy the vector contents, in case some of these hooks
4251 do subsequent modification of the buffer. */
4252 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4253 Lisp_Object
*copy
= alloca (size
* sizeof *copy
);
4256 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4257 size
* sizeof (Lisp_Object
));
4259 gcpro1
.nvars
= size
;
4261 for (i
= 0; i
< size
;)
4263 Lisp_Object prop_i
, overlay_i
;
4265 overlay_i
= copy
[i
++];
4266 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4273 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4274 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4276 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4278 GCPRO4 (list
, arg1
, arg2
, arg3
);
4280 while (CONSP (list
))
4283 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4285 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4291 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4294 evaporate_overlays (ptrdiff_t pos
)
4296 Lisp_Object overlay
, hit_list
;
4297 struct Lisp_Overlay
*tail
;
4300 if (pos
<= current_buffer
->overlay_center
)
4301 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4304 XSETMISC (overlay
, tail
);
4305 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4308 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4309 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4310 hit_list
= Fcons (overlay
, hit_list
);
4313 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4316 XSETMISC (overlay
, tail
);
4317 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4320 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4321 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4322 hit_list
= Fcons (overlay
, hit_list
);
4324 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4325 Fdelete_overlay (XCAR (hit_list
));
4328 /* Somebody has tried to store a value with an unacceptable type
4329 in the slot with offset OFFSET. */
4332 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4334 Lisp_Object predicate
;
4338 case_Lisp_Int
: predicate
= Qintegerp
; break;
4339 case Lisp_String
: predicate
= Qstringp
; break;
4340 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4344 wrong_type_argument (predicate
, newval
);
4348 /***********************************************************************
4349 Allocation with mmap
4350 ***********************************************************************/
4352 #ifdef USE_MMAP_FOR_BUFFERS
4354 #include <sys/types.h>
4355 #include <sys/mman.h>
4358 #ifdef MAP_ANONYMOUS
4359 #define MAP_ANON MAP_ANONYMOUS
4366 #define MAP_FAILED ((void *) -1)
4378 /* Memory is allocated in regions which are mapped using mmap(2).
4379 The current implementation lets the system select mapped
4380 addresses; we're not using MAP_FIXED in general, except when
4381 trying to enlarge regions.
4383 Each mapped region starts with a mmap_region structure, the user
4384 area starts after that structure, aligned to MEM_ALIGN.
4386 +-----------------------+
4387 | struct mmap_info + |
4389 +-----------------------+
4393 +-----------------------+ */
4397 /* User-specified size. */
4398 size_t nbytes_specified
;
4400 /* Number of bytes mapped */
4401 size_t nbytes_mapped
;
4403 /* Pointer to the location holding the address of the memory
4404 allocated with the mmap'd block. The variable actually points
4405 after this structure. */
4408 /* Next and previous in list of all mmap'd regions. */
4409 struct mmap_region
*next
, *prev
;
4412 /* Doubly-linked list of mmap'd regions. */
4414 static struct mmap_region
*mmap_regions
;
4416 /* File descriptor for mmap. If we don't have anonymous mapping,
4417 /dev/zero will be opened on it. */
4421 /* Temporary storage for mmap_set_vars, see there. */
4423 static struct mmap_region
*mmap_regions_1
;
4424 static int mmap_fd_1
;
4426 /* Page size on this system. */
4428 static int mmap_page_size
;
4430 /* 1 means mmap has been initialized. */
4432 static int mmap_initialized_p
;
4434 /* Value is X rounded up to the next multiple of N. */
4436 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4438 /* Size of mmap_region structure plus padding. */
4440 #define MMAP_REGION_STRUCT_SIZE \
4441 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4443 /* Given a pointer P to the start of the user-visible part of a mapped
4444 region, return a pointer to the start of the region. */
4446 #define MMAP_REGION(P) \
4447 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4449 /* Given a pointer P to the start of a mapped region, return a pointer
4450 to the start of the user-visible part of the region. */
4452 #define MMAP_USER_AREA(P) \
4453 ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4455 #define MEM_ALIGN sizeof (double)
4457 /* Predicate returning true if part of the address range [START .. END]
4458 is currently mapped. Used to prevent overwriting an existing
4461 Default is to conservatively assume the address range is occupied by
4462 something else. This can be overridden by system configuration
4463 files if system-specific means to determine this exists. */
4465 #ifndef MMAP_ALLOCATED_P
4466 #define MMAP_ALLOCATED_P(start, end) 1
4469 /* Perform necessary initializations for the use of mmap. */
4475 /* The value of mmap_fd is initially 0 in temacs, and -1
4476 in a dumped Emacs. */
4479 /* No anonymous mmap -- we need the file descriptor. */
4480 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4482 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4484 #endif /* MAP_ANON == 0 */
4486 if (mmap_initialized_p
)
4488 mmap_initialized_p
= 1;
4494 mmap_page_size
= getpagesize ();
4497 /* Return a region overlapping address range START...END, or null if
4498 none. END is not including, i.e. the last byte in the range
4501 static struct mmap_region
*
4502 mmap_find (void *start
, void *end
)
4504 struct mmap_region
*r
;
4505 char *s
= (char *) start
, *e
= (char *) end
;
4507 for (r
= mmap_regions
; r
; r
= r
->next
)
4509 char *rstart
= (char *) r
;
4510 char *rend
= rstart
+ r
->nbytes_mapped
;
4512 if (/* First byte of range, i.e. START, in this region? */
4513 (s
>= rstart
&& s
< rend
)
4514 /* Last byte of range, i.e. END - 1, in this region? */
4515 || (e
> rstart
&& e
<= rend
)
4516 /* First byte of this region in the range? */
4517 || (rstart
>= s
&& rstart
< e
)
4518 /* Last byte of this region in the range? */
4519 || (rend
> s
&& rend
<= e
))
4527 /* Unmap a region. P is a pointer to the start of the user-araa of
4528 the region. Value is non-zero if successful. */
4531 mmap_free_1 (struct mmap_region
*r
)
4534 r
->next
->prev
= r
->prev
;
4536 r
->prev
->next
= r
->next
;
4538 mmap_regions
= r
->next
;
4540 if (munmap (r
, r
->nbytes_mapped
) == -1)
4542 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4550 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4551 Value is non-zero if successful. */
4554 mmap_enlarge (struct mmap_region
*r
, int npages
)
4556 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4562 /* Unmap pages at the end of the region. */
4563 nbytes
= - npages
* mmap_page_size
;
4564 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4565 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4568 r
->nbytes_mapped
-= nbytes
;
4572 else if (npages
> 0)
4574 nbytes
= npages
* mmap_page_size
;
4576 /* Try to map additional pages at the end of the region. We
4577 cannot do this if the address range is already occupied by
4578 something else because mmap deletes any previous mapping.
4579 I'm not sure this is worth doing, let's see. */
4580 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4584 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4585 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4586 if (p
== MAP_FAILED
)
4587 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4588 else if (p
!= region_end
)
4590 /* Kernels are free to choose a different address. In
4591 that case, unmap what we've mapped above; we have
4593 if (munmap (p
, nbytes
) == -1)
4594 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4598 r
->nbytes_mapped
+= nbytes
;
4608 /* Set or reset variables holding references to mapped regions. If
4609 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4610 non-zero, set all variables to the start of the user-areas
4613 This function is called from Fdump_emacs to ensure that the dumped
4614 Emacs doesn't contain references to memory that won't be mapped
4615 when Emacs starts. */
4618 mmap_set_vars (int restore_p
)
4620 struct mmap_region
*r
;
4624 mmap_regions
= mmap_regions_1
;
4625 mmap_fd
= mmap_fd_1
;
4626 for (r
= mmap_regions
; r
; r
= r
->next
)
4627 *r
->var
= MMAP_USER_AREA (r
);
4631 for (r
= mmap_regions
; r
; r
= r
->next
)
4633 mmap_regions_1
= mmap_regions
;
4634 mmap_regions
= NULL
;
4635 mmap_fd_1
= mmap_fd
;
4641 /* Allocate a block of storage large enough to hold NBYTES bytes of
4642 data. A pointer to the data is returned in *VAR. VAR is thus the
4643 address of some variable which will use the data area.
4645 The allocation of 0 bytes is valid.
4647 If we can't allocate the necessary memory, set *VAR to null, and
4651 mmap_alloc (void **var
, size_t nbytes
)
4658 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4659 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4662 if (p
== MAP_FAILED
)
4664 if (errno
!= ENOMEM
)
4665 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4670 struct mmap_region
*r
= (struct mmap_region
*) p
;
4672 r
->nbytes_specified
= nbytes
;
4673 r
->nbytes_mapped
= map
;
4676 r
->next
= mmap_regions
;
4681 p
= MMAP_USER_AREA (p
);
4688 /* Free a block of relocatable storage whose data is pointed to by
4689 PTR. Store 0 in *PTR to show there's no block allocated. */
4692 mmap_free (void **var
)
4698 mmap_free_1 (MMAP_REGION (*var
));
4704 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4705 resize it to size NBYTES. Change *VAR to reflect the new block,
4706 and return this value. If more memory cannot be allocated, then
4707 leave *VAR unchanged, and return null. */
4710 mmap_realloc (void **var
, size_t nbytes
)
4717 result
= mmap_alloc (var
, nbytes
);
4718 else if (nbytes
== 0)
4721 result
= mmap_alloc (var
, nbytes
);
4725 struct mmap_region
*r
= MMAP_REGION (*var
);
4726 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4731 void *old_ptr
= *var
;
4733 /* Try to map additional pages at the end of the region.
4734 If that fails, allocate a new region, copy data
4735 from the old region, then free it. */
4736 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4739 r
->nbytes_specified
= nbytes
;
4740 *var
= result
= old_ptr
;
4742 else if (mmap_alloc (var
, nbytes
))
4744 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4745 mmap_free_1 (MMAP_REGION (old_ptr
));
4747 r
= MMAP_REGION (result
);
4748 r
->nbytes_specified
= nbytes
;
4756 else if (room
- nbytes
>= mmap_page_size
)
4758 /* Shrinking by at least a page. Let's give some
4759 memory back to the system.
4761 The extra parens are to make the division happens first,
4762 on positive values, so we know it will round towards
4764 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4766 r
->nbytes_specified
= nbytes
;
4770 /* Leave it alone. */
4772 r
->nbytes_specified
= nbytes
;
4780 #endif /* USE_MMAP_FOR_BUFFERS */
4784 /***********************************************************************
4785 Buffer-text Allocation
4786 ***********************************************************************/
4788 /* Allocate NBYTES bytes for buffer B's text buffer. */
4791 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4796 #if defined USE_MMAP_FOR_BUFFERS
4797 p
= mmap_alloc ((void **) &b
->text
->beg
, nbytes
);
4798 #elif defined REL_ALLOC
4799 p
= r_alloc ((void **) &b
->text
->beg
, nbytes
);
4801 p
= xmalloc (nbytes
);
4807 memory_full (nbytes
);
4810 b
->text
->beg
= (unsigned char *) p
;
4814 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4818 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4821 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4824 #if defined USE_MMAP_FOR_BUFFERS
4825 p
= mmap_realloc ((void **) &b
->text
->beg
, nbytes
);
4826 #elif defined REL_ALLOC
4827 p
= r_re_alloc ((void **) &b
->text
->beg
, nbytes
);
4829 p
= xrealloc (b
->text
->beg
, nbytes
);
4835 memory_full (nbytes
);
4838 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4843 /* Free buffer B's text buffer. */
4846 free_buffer_text (struct buffer
*b
)
4850 #if defined USE_MMAP_FOR_BUFFERS
4851 mmap_free ((void **) &b
->text
->beg
);
4852 #elif defined REL_ALLOC
4853 r_alloc_free ((void **) &b
->text
->beg
);
4855 xfree (b
->text
->beg
);
4858 BUF_BEG_ADDR (b
) = NULL
;
4864 /***********************************************************************
4866 ***********************************************************************/
4869 init_buffer_once (void)
4872 /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make
4873 sure that this is still correct. Otherwise, mark_vectorlike may not
4874 trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */
4876 = (offsetof (struct buffer
, own_text
) - sizeof (struct vectorlike_header
))
4877 / sizeof (Lisp_Object
);
4879 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4881 /* Make sure all markable slots in buffer_defaults
4882 are initialized reasonably, so mark_buffer won't choke. */
4883 reset_buffer (&buffer_defaults
);
4884 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4885 reset_buffer_local_variables (&buffer_defaults
, 1);
4886 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4887 reset_buffer (&buffer_local_symbols
);
4888 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4889 /* Prevent GC from getting confused. */
4890 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4891 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4892 BUF_INTERVALS (&buffer_defaults
) = 0;
4893 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4894 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, pvecsize
);
4895 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4896 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, pvecsize
);
4897 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4899 /* Set up the default values of various buffer slots. */
4900 /* Must do these before making the first buffer! */
4902 /* real setup is done in bindings.el */
4903 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4904 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4905 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4906 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4907 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4908 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4909 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4910 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4911 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4912 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4913 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4914 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4915 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4916 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4917 buffer_defaults
.overlays_before
= NULL
;
4918 buffer_defaults
.overlays_after
= NULL
;
4919 buffer_defaults
.overlay_center
= BEG
;
4921 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4922 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4923 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4924 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4925 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4926 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4927 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4928 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4929 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4931 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4932 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4933 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4934 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4935 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4936 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4937 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4938 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4939 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4940 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4941 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4942 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4943 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4944 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4945 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4946 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4947 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4948 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4949 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4950 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4951 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4953 /* Assign the local-flags to the slots that have default values.
4954 The local flag is a bit that is used in the buffer
4955 to say that it has its own local value for the slot.
4956 The local flag bits are in the local_var_flags slot of the buffer. */
4958 /* Nothing can work if this isn't true */
4959 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4961 /* 0 means not a lisp var, -1 means always local, else mask */
4962 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4963 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4964 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4965 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4966 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4967 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4968 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4969 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4970 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4971 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4972 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4973 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4974 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4975 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4976 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4977 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4978 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4979 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4980 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4983 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4984 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4985 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4986 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4988 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4990 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4992 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4994 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4995 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
5000 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
5001 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
5002 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
5003 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
5004 /* Make this one a permanent local. */
5005 buffer_permanent_local_flags
[idx
++] = 1;
5006 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
5007 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
5008 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5010 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5012 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5013 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5014 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5015 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5016 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5017 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5018 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5019 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5020 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5021 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5022 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5024 /* Need more room? */
5025 if (idx
>= MAX_PER_BUFFER_VARS
)
5027 last_per_buffer_idx
= idx
;
5029 Vbuffer_alist
= Qnil
;
5033 QSFundamental
= make_pure_c_string ("Fundamental");
5035 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5036 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5038 Qmode_class
= intern_c_string ("mode-class");
5040 Qprotected_field
= intern_c_string ("protected-field");
5042 Qpermanent_local
= intern_c_string ("permanent-local");
5044 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5045 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5047 /* super-magic invisible buffer */
5048 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5049 Vbuffer_alist
= Qnil
;
5051 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5053 inhibit_modification_hooks
= 0;
5063 #ifdef USE_MMAP_FOR_BUFFERS
5065 /* When using the ralloc implementation based on mmap(2), buffer
5066 text pointers will have been set to null in the dumped Emacs.
5070 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5071 if (b
->text
->beg
== NULL
)
5072 enlarge_buffer_text (b
, 0);
5074 #endif /* USE_MMAP_FOR_BUFFERS */
5076 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5077 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5078 Fset_buffer_multibyte (Qnil
);
5080 pwd
= get_current_dir_name ();
5083 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5085 /* Maybe this should really use some standard subroutine
5086 whose definition is filename syntax dependent. */
5088 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5090 /* Grow buffer to add directory separator and '\0'. */
5091 pwd
= realloc (pwd
, len
+ 2);
5093 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5094 pwd
[len
] = DIRECTORY_SEP
;
5095 pwd
[len
+ 1] = '\0';
5098 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5099 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5100 /* At this moment, we still don't know how to decode the
5101 directory name. So, we keep the bytes in multibyte form so
5102 that ENCODE_FILE correctly gets the original bytes. */
5103 BVAR (current_buffer
, directory
)
5104 = string_to_multibyte (BVAR (current_buffer
, directory
));
5106 /* Add /: to the front of the name
5107 if it would otherwise be treated as magic. */
5108 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5110 /* If the default dir is just /, TEMP is non-nil
5111 because of the ange-ftp completion handler.
5112 However, it is not necessary to turn / into /:/.
5113 So avoid doing that. */
5114 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5115 BVAR (current_buffer
, directory
)
5116 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5118 temp
= get_minibuffer (0);
5119 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5124 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5125 Object stored in the current buffer. address is the address of the slot
5126 in the buffer that is current now. */
5128 /* TYPE is nil for a general Lisp variable.
5129 An integer specifies a type; then only Lisp values
5130 with that type code are allowed (except that nil is allowed too).
5131 LNAME is the Lisp-level variable name.
5132 VNAME is the name of the buffer slot.
5133 DOC is a dummy where you write the doc string as a comment. */
5134 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5136 static struct Lisp_Buffer_Objfwd bo_fwd; \
5137 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5141 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5142 Lisp_Object
*address
, Lisp_Object type
)
5144 struct Lisp_Symbol
*sym
;
5147 sym
= XSYMBOL (intern (namestring
));
5148 offset
= (char *)address
- (char *)current_buffer
;
5150 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5151 bo_fwd
->offset
= offset
;
5152 bo_fwd
->slottype
= type
;
5153 sym
->declared_special
= 1;
5154 sym
->redirect
= SYMBOL_FORWARDED
;
5156 /* I tried to do the job without a cast, but it seems impossible.
5157 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5158 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5160 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5162 if (PER_BUFFER_IDX (offset
) == 0)
5163 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5164 slot of buffer_local_flags */
5169 /* initialize the buffer routines */
5171 syms_of_buffer (void)
5173 staticpro (&last_overlay_modification_hooks
);
5174 last_overlay_modification_hooks
5175 = Fmake_vector (make_number (10), Qnil
);
5177 staticpro (&Vbuffer_defaults
);
5178 staticpro (&Vbuffer_local_symbols
);
5179 staticpro (&Qfundamental_mode
);
5180 staticpro (&Qmode_class
);
5181 staticpro (&QSFundamental
);
5182 staticpro (&Vbuffer_alist
);
5183 staticpro (&Qprotected_field
);
5184 staticpro (&Qpermanent_local
);
5185 staticpro (&Qkill_buffer_hook
);
5187 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5188 DEFSYM (Qoverlayp
, "overlayp");
5189 DEFSYM (Qevaporate
, "evaporate");
5190 DEFSYM (Qmodification_hooks
, "modification-hooks");
5191 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5192 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5193 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5194 DEFSYM (Qpriority
, "priority");
5195 DEFSYM (Qbefore_string
, "before-string");
5196 DEFSYM (Qafter_string
, "after-string");
5197 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5198 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5199 DEFSYM (Qafter_change_functions
, "after-change-functions");
5200 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5202 Fput (Qprotected_field
, Qerror_conditions
,
5203 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5204 Fput (Qprotected_field
, Qerror_message
,
5205 make_pure_c_string ("Attempt to modify a protected field"));
5207 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5209 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5210 This is the same as (default-value 'mode-line-format). */);
5212 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5214 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5215 This is the same as (default-value 'header-line-format). */);
5217 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5218 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5219 This is the same as (default-value 'cursor-type). */);
5221 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5223 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5224 This is the same as (default-value 'line-spacing). */);
5226 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5227 cursor_in_non_selected_windows
,
5228 doc
: /* Default value of `cursor-in-non-selected-windows'.
5229 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5231 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5233 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5234 This is the same as (default-value 'abbrev-mode). */);
5236 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5238 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5239 This is the same as (default-value 'ctl-arrow). */);
5241 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5242 enable_multibyte_characters
,
5243 doc
: /* Default value of `enable-multibyte-characters' for buffers not overriding it.
5244 This is the same as (default-value 'enable-multibyte-characters). */);
5246 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5247 buffer_file_coding_system
,
5248 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5249 This is the same as (default-value 'buffer-file-coding-system). */);
5251 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5253 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5254 This is the same as (default-value 'truncate-lines). */);
5256 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5258 doc
: /* Default value of `fill-column' for buffers that do not override it.
5259 This is the same as (default-value 'fill-column). */);
5261 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5263 doc
: /* Default value of `left-margin' for buffers that do not override it.
5264 This is the same as (default-value 'left-margin). */);
5266 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5268 doc
: /* Default value of `tab-width' for buffers that do not override it.
5269 This is the same as (default-value 'tab-width). */);
5271 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5273 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5274 This is the same as (default-value 'case-fold-search). */);
5276 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5278 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5279 This is the same as (default-value 'left-margin-width). */);
5281 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5283 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5284 This is the same as (default-value 'right-margin-width). */);
5286 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5288 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5289 This is the same as (default-value 'left-fringe-width). */);
5291 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5293 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5294 This is the same as (default-value 'right-fringe-width). */);
5296 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5297 fringes_outside_margins
,
5298 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5299 This is the same as (default-value 'fringes-outside-margins). */);
5301 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5303 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5304 This is the same as (default-value 'scroll-bar-width). */);
5306 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5307 vertical_scroll_bar_type
,
5308 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5309 This is the same as (default-value 'vertical-scroll-bar). */);
5311 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5312 indicate_empty_lines
,
5313 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5314 This is the same as (default-value 'indicate-empty-lines). */);
5316 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5317 indicate_buffer_boundaries
,
5318 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5319 This is the same as (default-value 'indicate-buffer-boundaries). */);
5321 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5322 fringe_indicator_alist
,
5323 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5324 This is the same as (default-value 'fringe-indicator-alist'). */);
5326 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5327 fringe_cursor_alist
,
5328 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5329 This is the same as (default-value 'fringe-cursor-alist'). */);
5331 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5332 scroll_up_aggressively
,
5333 doc
: /* Default value of `scroll-up-aggressively'.
5334 This value applies in buffers that don't have their own local values.
5335 This is the same as (default-value 'scroll-up-aggressively). */);
5337 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5338 scroll_down_aggressively
,
5339 doc
: /* Default value of `scroll-down-aggressively'.
5340 This value applies in buffers that don't have their own local values.
5341 This is the same as (default-value 'scroll-down-aggressively). */);
5343 DEFVAR_PER_BUFFER ("header-line-format",
5344 &BVAR (current_buffer
, header_line_format
),
5346 doc
: /* Analogous to `mode-line-format', but controls the header line.
5347 The header line appears, optionally, at the top of a window;
5348 the mode line appears at the bottom. */);
5350 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5352 doc
: /* Template for displaying mode line for current buffer.
5354 The value may be nil, a string, a symbol or a list.
5356 A value of nil means don't display a mode line.
5358 For any symbol other than t or nil, the symbol's value is processed as
5359 a mode line construct. As a special exception, if that value is a
5360 string, the string is processed verbatim, without handling any
5361 %-constructs (see below). Also, unless the symbol has a non-nil
5362 `risky-local-variable' property, all properties in any strings, as
5363 well as all :eval and :propertize forms in the value, are ignored.
5365 A list whose car is a string or list is processed by processing each
5366 of the list elements recursively, as separate mode line constructs,
5367 and concatenating the results.
5369 A list of the form `(:eval FORM)' is processed by evaluating FORM and
5370 using the result as a mode line construct. Be careful--FORM should
5371 not load any files, because that can cause an infinite recursion.
5373 A list of the form `(:propertize ELT PROPS...)' is processed by
5374 processing ELT as the mode line construct, and adding the text
5375 properties PROPS to the result.
5377 A list whose car is a symbol is processed by examining the symbol's
5378 value, and, if that value is non-nil, processing the cadr of the list
5379 recursively; and if that value is nil, processing the caddr of the
5382 A list whose car is an integer is processed by processing the cadr of
5383 the list, and padding (if the number is positive) or truncating (if
5384 negative) to the width specified by that number.
5386 A string is printed verbatim in the mode line except for %-constructs:
5387 %b -- print buffer name. %f -- print visited file name.
5388 %F -- print frame name.
5389 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5390 %& is like %*, but ignore read-only-ness.
5391 % means buffer is read-only and * means it is modified.
5392 For a modified read-only buffer, %* gives % and %+ gives *.
5393 %s -- print process status. %l -- print the current line number.
5394 %c -- print the current column number (this makes editing slower).
5395 To make the column number update correctly in all cases,
5396 `column-number-mode' must be non-nil.
5397 %i -- print the size of the buffer.
5398 %I -- like %i, but use k, M, G, etc., to abbreviate.
5399 %p -- print percent of buffer above top of window, or Top, Bot or All.
5400 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5401 or print Bottom or All.
5402 %n -- print Narrow if appropriate.
5403 %t -- visited file is text or binary (if OS supports this distinction).
5404 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5405 %Z -- like %z, but including the end-of-line format.
5406 %e -- print error message about full memory.
5407 %@ -- print @ or hyphen. @ means that default-directory is on a
5409 %[ -- print one [ for each recursive editing level. %] similar.
5410 %% -- print %. %- -- print infinitely many dashes.
5411 Decimal digits after the % specify field width to which to pad. */);
5413 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5414 doc
: /* Value of `major-mode' for new buffers. */);
5416 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5417 make_number (Lisp_Symbol
),
5418 doc
: /* Symbol for current buffer's major mode.
5419 The default value (normally `fundamental-mode') affects new buffers.
5420 A value of nil means to use the current buffer's major mode, provided
5421 it is not marked as "special".
5423 When a mode is used by default, `find-file' switches to it before it
5424 reads the contents into the buffer and before it finishes setting up
5425 the buffer. Thus, the mode and its hooks should not expect certain
5426 variables such as `buffer-read-only' and `buffer-file-coding-system'
5429 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5431 doc
: /* Pretty name of current buffer's major mode.
5432 Usually a string, but can use any of the constructs for `mode-line-format',
5434 Format with `format-mode-line' to produce a string value. */);
5436 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5437 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5439 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5440 doc
: /* Non-nil if Abbrev mode is enabled.
5441 Use the command `abbrev-mode' to change this variable. */);
5443 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5445 doc
: /* Non-nil if searches and matches should ignore case. */);
5447 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5448 make_number (LISP_INT_TAG
),
5449 doc
: /* Column beyond which automatic line-wrapping should happen.
5450 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5452 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5453 make_number (LISP_INT_TAG
),
5454 doc
: /* Column for the default `indent-line-function' to indent to.
5455 Linefeed indents to this column in Fundamental mode. */);
5457 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5458 make_number (LISP_INT_TAG
),
5459 doc
: /* Distance between tab stops (for display of tab characters), in columns.
5460 This should be an integer greater than zero. */);
5462 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5463 doc
: /* Non-nil means display control chars with uparrow.
5464 A value of nil means use backslash and octal digits.
5465 This variable does not apply to characters whose display is specified
5466 in the current display table (if there is one). */);
5468 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5469 &BVAR (current_buffer
, enable_multibyte_characters
),
5471 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5472 Otherwise they are regarded as unibyte. This affects the display,
5473 file I/O and the behavior of various editing commands.
5475 This variable is buffer-local but you cannot set it directly;
5476 use the function `set-buffer-multibyte' to change a buffer's representation.
5477 See also Info node `(elisp)Text Representations'. */);
5478 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5480 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5481 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5482 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5483 This variable applies to saving the buffer, and also to `write-region'
5484 and other functions that use `write-region'.
5485 It does not apply to sending output to subprocesses, however.
5487 If this is nil, the buffer is saved without any code conversion
5488 unless some coding system is specified in `file-coding-system-alist'
5489 for the buffer file.
5491 If the text to be saved cannot be encoded as specified by this variable,
5492 an alternative encoding is selected by `select-safe-coding-system', which see.
5494 The variable `coding-system-for-write', if non-nil, overrides this variable.
5496 This variable is never applied to a way of decoding a file while reading it. */);
5498 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5499 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5500 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5502 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5503 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5504 doc
: /* If non-nil, forces directionality of text paragraphs in the buffer.
5506 If this is nil (the default), the direction of each paragraph is
5507 determined by the first strong directional character of its text.
5508 The values of `right-to-left' and `left-to-right' override that.
5509 Any other value is treated as nil.
5511 This variable has no effect unless the buffer's value of
5512 \`bidi-display-reordering' is non-nil. */);
5514 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5515 doc
: /* Non-nil means do not display continuation lines.
5516 Instead, give each line of text just one screen line.
5518 Note that this is overridden by the variable
5519 `truncate-partial-width-windows' if that variable is non-nil
5520 and this buffer is not full-frame width.
5522 Minibuffers set this variable to nil. */);
5524 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5525 doc
: /* Non-nil means to use word-wrapping for continuation lines.
5526 When word-wrapping is on, continuation lines are wrapped at the space
5527 or tab character nearest to the right window edge.
5528 If nil, continuation lines are wrapped at the right screen edge.
5530 This variable has no effect if long lines are truncated (see
5531 `truncate-lines' and `truncate-partial-width-windows'). If you use
5532 word-wrapping, you might want to reduce the value of
5533 `truncate-partial-width-windows', since wrapping can make text readable
5534 in narrower windows.
5536 Instead of setting this variable directly, most users should use
5537 Visual Line mode . Visual Line mode, when enabled, sets `word-wrap'
5538 to t, and additionally redefines simple editing commands to act on
5539 visual lines rather than logical lines. See the documentation of
5540 `visual-line-mode'. */);
5542 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5543 make_number (Lisp_String
),
5544 doc
: /* Name of default directory of current buffer. Should end with slash.
5545 To interactively change the default directory, use command `cd'. */);
5547 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5549 doc
: /* Function called (if non-nil) to perform auto-fill.
5550 It is called after self-inserting any character specified in
5551 the `auto-fill-chars' table.
5552 NOTE: This variable is not a hook;
5553 its value may not be a list of functions. */);
5555 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5556 make_number (Lisp_String
),
5557 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5559 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5560 make_number (Lisp_String
),
5561 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5562 The truename of a file is calculated by `file-truename'
5563 and then abbreviated with `abbreviate-file-name'. */);
5565 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5566 &BVAR (current_buffer
, auto_save_file_name
),
5567 make_number (Lisp_String
),
5568 doc
: /* Name of file for auto-saving current buffer.
5569 If it is nil, that means don't auto-save this buffer. */);
5571 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5572 doc
: /* Non-nil if this buffer is read-only. */);
5574 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5575 doc
: /* Non-nil if this buffer's file has been backed up.
5576 Backing up is done before the first time the file is saved. */);
5578 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5579 make_number (LISP_INT_TAG
),
5580 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5582 -1 means auto-saving turned off until next real save.
5584 If you set this to -2, that means don't turn off auto-saving in this buffer
5585 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5586 you probably should set this to -2 in that buffer. */);
5588 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5590 doc
: /* Non-nil enables selective display.
5591 An integer N as value means display only lines
5592 that start with less than N columns of space.
5593 A value of t means that the character ^M makes itself and
5594 all the rest of the line invisible; also, when saving the buffer
5595 in a file, save the ^M as a newline. */);
5597 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5598 &BVAR (current_buffer
, selective_display_ellipses
),
5600 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5602 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5603 doc
: /* Non-nil if self-insertion should replace existing text.
5604 The value should be one of `overwrite-mode-textual',
5605 `overwrite-mode-binary', or nil.
5606 If it is `overwrite-mode-textual', self-insertion still
5607 inserts at the end of a line, and inserts when point is before a tab,
5608 until the tab is filled in.
5609 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5611 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5613 doc
: /* Display table that controls display of the contents of current buffer.
5615 If this variable is nil, the value of `standard-display-table' is used.
5616 Each window can have its own, overriding display table, see
5617 `set-window-display-table' and `window-display-table'.
5619 The display table is a char-table created with `make-display-table'.
5620 A char-table is an array indexed by character codes. Normal array
5621 primitives `aref' and `aset' can be used to access elements of a char-table.
5623 Each of the char-table elements control how to display the corresponding
5624 text character: the element at index C in the table says how to display
5625 the character whose code is C. Each element should be a vector of
5626 characters or nil. The value nil means display the character in the
5627 default fashion; otherwise, the characters from the vector are delivered
5628 to the screen instead of the original character.
5630 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5631 to display a capital Y instead of each X character.
5633 In addition, a char-table has six extra slots to control the display of:
5635 the end of a truncated screen line (extra-slot 0, a single character);
5636 the end of a continued line (extra-slot 1, a single character);
5637 the escape character used to display character codes in octal
5638 (extra-slot 2, a single character);
5639 the character used as an arrow for control characters (extra-slot 3,
5640 a single character);
5641 the decoration indicating the presence of invisible lines (extra-slot 4,
5642 a vector of characters);
5643 the character used to draw the border between side-by-side windows
5644 (extra-slot 5, a single character).
5646 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5648 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5650 doc
: /* Width of left marginal area for display of a buffer.
5651 A value of nil means no marginal area. */);
5653 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5655 doc
: /* Width of right marginal area for display of a buffer.
5656 A value of nil means no marginal area. */);
5658 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5660 doc
: /* Width of this buffer's left fringe (in pixels).
5661 A value of 0 means no left fringe is shown in this buffer's window.
5662 A value of nil means to use the left fringe width from the window's frame. */);
5664 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5666 doc
: /* Width of this buffer's right fringe (in pixels).
5667 A value of 0 means no right fringe is shown in this buffer's window.
5668 A value of nil means to use the right fringe width from the window's frame. */);
5670 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5672 doc
: /* Non-nil means to display fringes outside display margins.
5673 A value of nil means to display fringes between margins and buffer text. */);
5675 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5677 doc
: /* Width of this buffer's scroll bars in pixels.
5678 A value of nil means to use the scroll bar width from the window's frame. */);
5680 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5682 doc
: /* Position of this buffer's vertical scroll bar.
5683 The value takes effect whenever you tell a window to display this buffer;
5684 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5686 A value of `left' or `right' means put the vertical scroll bar at that side
5687 of the window; a value of nil means don't show any vertical scroll bars.
5688 A value of t (the default) means do whatever the window's frame specifies. */);
5690 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5691 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5692 doc
: /* Visually indicate empty lines after the buffer end.
5693 If non-nil, a bitmap is displayed in the left fringe of a window on
5694 window-systems. */);
5696 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5697 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5698 doc
: /* Visually indicate buffer boundaries and scrolling.
5699 If non-nil, the first and last line of the buffer are marked in the fringe
5700 of a window on window-systems with angle bitmaps, or if the window can be
5701 scrolled, the top and bottom line of the window are marked with up and down
5704 If value is a symbol `left' or `right', both angle and arrow bitmaps
5705 are displayed in the left or right fringe, resp. Any other value
5706 that doesn't look like an alist means display the angle bitmaps in
5707 the left fringe but no arrows.
5709 You can exercise more precise control by using an alist as the
5710 value. Each alist element (INDICATOR . POSITION) specifies
5711 where to show one of the indicators. INDICATOR is one of `top',
5712 `bottom', `up', `down', or t, which specifies the default position,
5713 and POSITION is one of `left', `right', or nil, meaning do not show
5716 For example, ((top . left) (t . right)) places the top angle bitmap in
5717 left fringe, the bottom angle bitmap in right fringe, and both arrow
5718 bitmaps in right fringe. To show just the angle bitmaps in the left
5719 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5721 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5722 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5723 doc
: /* Mapping from logical to physical fringe indicator bitmaps.
5724 The value is an alist where each element (INDICATOR . BITMAPS)
5725 specifies the fringe bitmaps used to display a specific logical
5728 INDICATOR specifies the logical indicator type which is one of the
5729 following symbols: `truncation' , `continuation', `overlay-arrow',
5730 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5732 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5733 the actual bitmap shown in the left or right fringe for the logical
5734 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5735 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5736 are used only for the `bottom' and `top-bottom' indicators when the
5737 last (only) line has no final newline. BITMAPS may also be a single
5738 symbol which is used in both left and right fringes. */);
5740 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5741 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5742 doc
: /* Mapping from logical to physical fringe cursor bitmaps.
5743 The value is an alist where each element (CURSOR . BITMAP)
5744 specifies the fringe bitmaps used to display a specific logical
5745 cursor type in the fringe.
5747 CURSOR specifies the logical cursor type which is one of the following
5748 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5749 one is used to show a hollow cursor on narrow lines display lines
5750 where the normal hollow cursor will not fit.
5752 BITMAP is the corresponding fringe bitmap shown for the logical
5755 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5756 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5757 doc
: /* How far to scroll windows upward.
5758 If you move point off the bottom, the window scrolls automatically.
5759 This variable controls how far it scrolls. The value nil, the default,
5760 means scroll to center point. A fraction means scroll to put point
5761 that fraction of the window's height from the bottom of the window.
5762 When the value is 0.0, point goes at the bottom line, which in the
5763 simple case that you moved off with C-f means scrolling just one line.
5764 1.0 means point goes at the top, so that in that simple case, the
5765 window scrolls by a full window height. Meaningful values are
5766 between 0.0 and 1.0, inclusive. */);
5768 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5769 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5770 doc
: /* How far to scroll windows downward.
5771 If you move point off the top, the window scrolls automatically.
5772 This variable controls how far it scrolls. The value nil, the default,
5773 means scroll to center point. A fraction means scroll to put point
5774 that fraction of the window's height from the top of the window.
5775 When the value is 0.0, point goes at the top line, which in the
5776 simple case that you moved off with C-b means scrolling just one line.
5777 1.0 means point goes at the bottom, so that in that simple case, the
5778 window scrolls by a full window height. Meaningful values are
5779 between 0.0 and 1.0, inclusive. */);
5781 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5785 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5786 doc
: /* List of functions to call before each text change.
5787 Two arguments are passed to each function: the positions of
5788 the beginning and end of the range of old text to be changed.
5789 \(For an insertion, the beginning and end are at the same place.)
5790 No information is given about the length of the text after the change.
5792 Buffer changes made while executing the `before-change-functions'
5793 don't call any before-change or after-change functions.
5794 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5796 If an unhandled error happens in running these functions,
5797 the variable's value remains nil. That prevents the error
5798 from happening repeatedly and making Emacs nonfunctional. */);
5799 Vbefore_change_functions
= Qnil
;
5801 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5802 doc
: /* List of functions to call after each text change.
5803 Three arguments are passed to each function: the positions of
5804 the beginning and end of the range of changed text,
5805 and the length in bytes of the pre-change text replaced by that range.
5806 \(For an insertion, the pre-change length is zero;
5807 for a deletion, that length is the number of bytes deleted,
5808 and the post-change beginning and end are at the same place.)
5810 Buffer changes made while executing the `after-change-functions'
5811 don't call any before-change or after-change functions.
5812 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5814 If an unhandled error happens in running these functions,
5815 the variable's value remains nil. That prevents the error
5816 from happening repeatedly and making Emacs nonfunctional. */);
5817 Vafter_change_functions
= Qnil
;
5819 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5820 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5821 The functions are run using the `run-hooks' function. */);
5822 Vfirst_change_hook
= Qnil
;
5824 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5825 doc
: /* List of undo entries in current buffer.
5826 Recent changes come first; older changes follow newer.
5828 An entry (BEG . END) represents an insertion which begins at
5829 position BEG and ends at position END.
5831 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5832 from (abs POSITION). If POSITION is positive, point was at the front
5833 of the text being deleted; if negative, point was at the end.
5835 An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously
5836 unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time)
5837 and is the visited file's modification time, as of that time. If the
5838 modification time of the most recent save is different, this entry is
5841 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5842 was modified between BEG and END. PROPERTY is the property name,
5843 and VALUE is the old value.
5845 An entry (apply FUN-NAME . ARGS) means undo the change with
5846 \(apply FUN-NAME ARGS).
5848 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5849 in the active region. BEG and END is the range affected by this entry
5850 and DELTA is the number of bytes added or deleted in that range by
5853 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5854 was adjusted in position by the offset DISTANCE (an integer).
5856 An entry of the form POSITION indicates that point was at the buffer
5857 location given by the integer. Undoing an entry of this form places
5860 Entries with value `nil' mark undo boundaries. The undo command treats
5861 the changes between two undo boundaries as a single step to be undone.
5863 If the value of the variable is t, undo information is not recorded. */);
5865 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5866 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5868 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5869 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5871 Normally, the line-motion functions work by scanning the buffer for
5872 newlines. Columnar operations (like `move-to-column' and
5873 `compute-motion') also work by scanning the buffer, summing character
5874 widths as they go. This works well for ordinary text, but if the
5875 buffer's lines are very long (say, more than 500 characters), these
5876 motion functions will take longer to execute. Emacs may also take
5877 longer to update the display.
5879 If `cache-long-line-scans' is non-nil, these motion functions cache the
5880 results of their scans, and consult the cache to avoid rescanning
5881 regions of the buffer until the text is modified. The caches are most
5882 beneficial when they prevent the most searching---that is, when the
5883 buffer contains long lines and large regions of characters with the
5884 same, fixed screen width.
5886 When `cache-long-line-scans' is non-nil, processing short lines will
5887 become slightly slower (because of the overhead of consulting the
5888 cache), and the caches will use memory roughly proportional to the
5889 number of newlines and characters whose screen width varies.
5891 The caches require no explicit maintenance; their accuracy is
5892 maintained internally by the Emacs primitives. Enabling or disabling
5893 the cache should not affect the behavior of any of the motion
5894 functions; it should only affect their performance. */);
5896 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5897 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5899 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5900 doc
: /* List of formats to use when saving this buffer.
5901 Formats are defined by `format-alist'. This variable is
5902 set when a file is visited. */);
5904 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5905 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5906 doc
: /* Format in which to write auto-save files.
5907 Should be a list of symbols naming formats that are defined in `format-alist'.
5908 If it is t, which is the default, auto-save files are written in the
5909 same format as a regular save would use. */);
5911 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5912 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5913 doc
: /* Invisibility spec of this buffer.
5914 The default is t, which means that text is invisible
5915 if it has a non-nil `invisible' property.
5916 If the value is a list, a text character is invisible if its `invisible'
5917 property is an element in that list (or is a list with members in common).
5918 If an element is a cons cell of the form (PROP . ELLIPSIS),
5919 then characters with property value PROP are invisible,
5920 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5922 DEFVAR_PER_BUFFER ("buffer-display-count",
5923 &BVAR (current_buffer
, display_count
), Qnil
,
5924 doc
: /* A number incremented each time this buffer is displayed in a window.
5925 The function `set-window-buffer' increments it. */);
5927 DEFVAR_PER_BUFFER ("buffer-display-time",
5928 &BVAR (current_buffer
, display_time
), Qnil
,
5929 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5930 The function `set-window-buffer' updates this variable
5931 to the value obtained by calling `current-time'.
5932 If the buffer has never been shown in a window, the value is nil. */);
5934 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5935 doc
: /* Non-nil if Transient Mark mode is enabled.
5936 See the command `transient-mark-mode' for a description of this minor mode.
5938 Non-nil also enables highlighting of the region whenever the mark is active.
5939 The variable `highlight-nonselected-windows' controls whether to highlight
5940 all windows or just the selected window.
5942 Lisp programs may give this variable certain special values:
5944 - A value of `lambda' enables Transient Mark mode temporarily.
5945 It is disabled again after any subsequent action that would
5946 normally deactivate the mark (e.g. buffer modification).
5948 - A value of (only . OLDVAL) enables Transient Mark mode
5949 temporarily. After any subsequent point motion command that is
5950 not shift-translated, or any other action that would normally
5951 deactivate the mark (e.g. buffer modification), the value of
5952 `transient-mark-mode' is set to OLDVAL. */);
5953 Vtransient_mark_mode
= Qnil
;
5955 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5956 doc
: /* Non-nil means disregard read-only status of buffers or characters.
5957 If the value is t, disregard `buffer-read-only' and all `read-only'
5958 text properties. If the value is a list, disregard `buffer-read-only'
5959 and disregard a `read-only' text property if the property value
5960 is a member of the list. */);
5961 Vinhibit_read_only
= Qnil
;
5963 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5964 doc
: /* Cursor to use when this buffer is in the selected window.
5965 Values are interpreted as follows:
5967 t use the cursor specified for the frame
5968 nil don't display a cursor
5969 box display a filled box cursor
5970 hollow display a hollow box cursor
5971 bar display a vertical bar cursor with default width
5972 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5973 hbar display a horizontal bar cursor with default height
5974 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5975 ANYTHING ELSE display a hollow box cursor
5977 When the buffer is displayed in a non-selected window, the
5978 cursor's appearance is instead controlled by the variable
5979 `cursor-in-non-selected-windows'. */);
5981 DEFVAR_PER_BUFFER ("line-spacing",
5982 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5983 doc
: /* Additional space to put between lines when displaying a buffer.
5984 The space is measured in pixels, and put below lines on graphic displays,
5985 see `display-graphic-p'.
5986 If value is a floating point number, it specifies the spacing relative
5987 to the default frame line height. A value of nil means add no extra space. */);
5989 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5990 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5991 doc
: /* Non-nil means show a cursor in non-selected windows.
5992 If nil, only shows a cursor in the selected window.
5993 If t, displays a cursor related to the usual cursor type
5994 \(a solid box becomes hollow, a bar becomes a narrower bar).
5995 You can also specify the cursor type as in the `cursor-type' variable.
5996 Use Custom to set this variable and update the display." */);
5998 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5999 doc
: /* List of functions called with no args to query before killing a buffer.
6000 The buffer being killed will be current while the functions are running.
6002 If any of them returns nil, the buffer is not killed. Functions run by
6003 this hook are supposed to not change the current buffer. */);
6004 Vkill_buffer_query_functions
= Qnil
;
6006 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
6007 doc
: /* Normal hook run before changing the major mode of a buffer.
6008 The function `kill-all-local-variables' runs this before doing anything else. */);
6009 Vchange_major_mode_hook
= Qnil
;
6010 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
6012 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
6013 doc
: /* Hook run when the buffer list changes.
6014 Functions running this hook are `get-buffer-create',
6015 `make-indirect-buffer', `rename-buffer', `kill-buffer',
6016 and `bury-buffer-internal'. */);
6017 Vbuffer_list_update_hook
= Qnil
;
6018 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
6020 defsubr (&Sbuffer_live_p
);
6021 defsubr (&Sbuffer_list
);
6022 defsubr (&Sget_buffer
);
6023 defsubr (&Sget_file_buffer
);
6024 defsubr (&Sget_buffer_create
);
6025 defsubr (&Smake_indirect_buffer
);
6026 defsubr (&Sgenerate_new_buffer_name
);
6027 defsubr (&Sbuffer_name
);
6028 /*defsubr (&Sbuffer_number);*/
6029 defsubr (&Sbuffer_file_name
);
6030 defsubr (&Sbuffer_base_buffer
);
6031 defsubr (&Sbuffer_local_value
);
6032 defsubr (&Sbuffer_local_variables
);
6033 defsubr (&Sbuffer_modified_p
);
6034 defsubr (&Sset_buffer_modified_p
);
6035 defsubr (&Sbuffer_modified_tick
);
6036 defsubr (&Sbuffer_chars_modified_tick
);
6037 defsubr (&Srename_buffer
);
6038 defsubr (&Sother_buffer
);
6039 defsubr (&Sbuffer_enable_undo
);
6040 defsubr (&Skill_buffer
);
6041 defsubr (&Sbury_buffer_internal
);
6042 defsubr (&Sset_buffer_major_mode
);
6043 defsubr (&Scurrent_buffer
);
6044 defsubr (&Sset_buffer
);
6045 defsubr (&Sbarf_if_buffer_read_only
);
6046 defsubr (&Serase_buffer
);
6047 defsubr (&Sbuffer_swap_text
);
6048 defsubr (&Sset_buffer_multibyte
);
6049 defsubr (&Skill_all_local_variables
);
6051 defsubr (&Soverlayp
);
6052 defsubr (&Smake_overlay
);
6053 defsubr (&Sdelete_overlay
);
6054 defsubr (&Smove_overlay
);
6055 defsubr (&Soverlay_start
);
6056 defsubr (&Soverlay_end
);
6057 defsubr (&Soverlay_buffer
);
6058 defsubr (&Soverlay_properties
);
6059 defsubr (&Soverlays_at
);
6060 defsubr (&Soverlays_in
);
6061 defsubr (&Snext_overlay_change
);
6062 defsubr (&Sprevious_overlay_change
);
6063 defsubr (&Soverlay_recenter
);
6064 defsubr (&Soverlay_lists
);
6065 defsubr (&Soverlay_get
);
6066 defsubr (&Soverlay_put
);
6067 defsubr (&Srestore_buffer_modified_p
);
6071 keys_of_buffer (void)
6073 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6074 initial_define_key (control_x_map
, 'k', "kill-buffer");
6076 /* This must not be in syms_of_buffer, because Qdisabled is not
6077 initialized when that function gets called. */
6078 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);