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 Lisp_Object
Fset_buffer_major_mode (Lisp_Object
);
111 static Lisp_Object
Fdelete_overlay (Lisp_Object
);
112 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
113 int after
, Lisp_Object arg1
,
114 Lisp_Object arg2
, Lisp_Object arg3
);
115 static void swap_out_buffer_local_variables (struct buffer
*b
);
116 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
118 /* Alist of all buffer names vs the buffers. */
119 /* This used to be a variable, but is no longer,
120 to prevent lossage due to user rplac'ing this alist or its elements. */
121 Lisp_Object Vbuffer_alist
;
123 static Lisp_Object Qkill_buffer_query_functions
;
125 /* Hook run before changing a major mode. */
126 static Lisp_Object Qchange_major_mode_hook
;
128 Lisp_Object Qfirst_change_hook
;
129 Lisp_Object Qbefore_change_functions
;
130 Lisp_Object Qafter_change_functions
;
132 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
133 static Lisp_Object Qpermanent_local_hook
;
135 static Lisp_Object Qprotected_field
;
137 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
139 static Lisp_Object Qkill_buffer_hook
;
140 static Lisp_Object Qbuffer_list_update_hook
;
142 static Lisp_Object Qget_file_buffer
;
144 static Lisp_Object Qoverlayp
;
146 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
148 static Lisp_Object Qevaporate
;
150 Lisp_Object Qmodification_hooks
;
151 Lisp_Object Qinsert_in_front_hooks
;
152 Lisp_Object Qinsert_behind_hooks
;
154 static void alloc_buffer_text (struct buffer
*, ptrdiff_t);
155 static void free_buffer_text (struct buffer
*b
);
156 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
157 static void modify_overlay (struct buffer
*, ptrdiff_t, ptrdiff_t);
158 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*);
160 /* For debugging; temporary. See set_buffer_internal. */
161 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
164 nsberror (Lisp_Object spec
)
167 error ("No buffer named %s", SDATA (spec
));
168 error ("Invalid buffer argument");
171 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
172 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
173 Value is nil if OBJECT is not a buffer or if it has been killed. */)
176 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
180 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
181 doc
: /* Return a list of all existing live buffers.
182 If the optional arg FRAME is a frame, we return the buffer list in the
183 proper order for that frame: the buffers show in FRAME come first,
184 followed by the rest of the buffers. */)
188 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
192 Lisp_Object framelist
, prevlist
, tail
;
196 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
197 prevlist
= Fnreverse (Fcopy_sequence
198 (XFRAME (frame
)->buried_buffer_list
));
200 /* Remove from GENERAL any buffer that duplicates one in
201 FRAMELIST or PREVLIST. */
205 general
= Fdelq (XCAR (tail
), general
);
211 general
= Fdelq (XCAR (tail
), general
);
218 return Fnconc (3, args
);
224 /* Like Fassoc, but use Fstring_equal to compare
225 (which ignores text properties),
226 and don't ever QUIT. */
229 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
231 register Lisp_Object tail
;
232 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
234 register Lisp_Object elt
, tem
;
236 tem
= Fstring_equal (Fcar (elt
), key
);
243 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
244 doc
: /* Return the buffer named BUFFER-OR-NAME.
245 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
246 is a string and there is no buffer with that name, return nil. If
247 BUFFER-OR-NAME is a buffer, return it as given. */)
248 (register Lisp_Object buffer_or_name
)
250 if (BUFFERP (buffer_or_name
))
251 return buffer_or_name
;
252 CHECK_STRING (buffer_or_name
);
254 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
257 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
258 doc
: /* Return the buffer visiting file FILENAME (a string).
259 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
260 If there is no such live buffer, return nil.
261 See also `find-buffer-visiting'. */)
262 (register Lisp_Object filename
)
264 register Lisp_Object tail
, buf
, tem
;
267 CHECK_STRING (filename
);
268 filename
= Fexpand_file_name (filename
, Qnil
);
270 /* If the file name has special constructs in it,
271 call the corresponding file handler. */
272 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
275 Lisp_Object handled_buf
= call2 (handler
, Qget_file_buffer
,
277 return BUFFERP (handled_buf
) ? handled_buf
: Qnil
;
280 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
282 buf
= Fcdr (XCAR (tail
));
283 if (!BUFFERP (buf
)) continue;
284 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
285 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
293 get_truename_buffer (register Lisp_Object filename
)
295 register Lisp_Object tail
, buf
, tem
;
297 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
299 buf
= Fcdr (XCAR (tail
));
300 if (!BUFFERP (buf
)) continue;
301 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
302 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
309 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
310 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
311 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
312 return that buffer. If no such buffer exists, create a new buffer with
313 that name and return it. If BUFFER-OR-NAME starts with a space, the new
314 buffer does not keep undo information.
316 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
317 even if it is dead. The return value is never nil. */)
318 (register Lisp_Object buffer_or_name
)
320 register Lisp_Object buffer
, name
;
321 register struct buffer
*b
;
323 buffer
= Fget_buffer (buffer_or_name
);
327 if (SCHARS (buffer_or_name
) == 0)
328 error ("Empty string for buffer name is not allowed");
330 b
= allocate_buffer ();
332 /* An ordinary buffer uses its own struct buffer_text. */
333 b
->text
= &b
->own_text
;
336 BUF_GAP_SIZE (b
) = 20;
338 /* We allocate extra 1-byte at the tail and keep it always '\0' for
339 anchoring a search. */
340 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
342 if (! BUF_BEG_ADDR (b
))
343 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
348 b
->pt_byte
= BEG_BYTE
;
349 b
->begv_byte
= BEG_BYTE
;
350 b
->zv_byte
= BEG_BYTE
;
353 BUF_GPT_BYTE (b
) = BEG_BYTE
;
356 BUF_Z_BYTE (b
) = BEG_BYTE
;
358 BUF_CHARS_MODIFF (b
) = 1;
359 BUF_OVERLAY_MODIFF (b
) = 1;
360 BUF_SAVE_MODIFF (b
) = 1;
361 BUF_INTERVALS (b
) = 0;
362 BUF_UNCHANGED_MODIFIED (b
) = 1;
363 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
364 BUF_END_UNCHANGED (b
) = 0;
365 BUF_BEG_UNCHANGED (b
) = 0;
366 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
367 b
->text
->inhibit_shrinking
= 0;
369 b
->newline_cache
= 0;
370 b
->width_run_cache
= 0;
371 BVAR (b
, width_table
) = Qnil
;
372 b
->prevent_redisplay_optimizations_p
= 1;
374 /* Put this on the chain of all buffers including killed ones. */
375 b
->header
.next
.buffer
= all_buffers
;
378 /* An ordinary buffer normally doesn't need markers
379 to handle BEGV and ZV. */
380 BVAR (b
, pt_marker
) = Qnil
;
381 BVAR (b
, begv_marker
) = Qnil
;
382 BVAR (b
, zv_marker
) = Qnil
;
384 name
= Fcopy_sequence (buffer_or_name
);
385 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
386 BVAR (b
, name
) = name
;
388 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
391 reset_buffer_local_variables (b
, 1);
393 BVAR (b
, mark
) = Fmake_marker ();
394 BUF_MARKERS (b
) = NULL
;
396 /* Put this in the alist of all live buffers. */
397 XSETBUFFER (buffer
, b
);
398 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
399 /* And run buffer-list-update-hook. */
400 if (!NILP (Vrun_hooks
))
401 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
407 /* Return a list of overlays which is a copy of the overlay list
408 LIST, but for buffer B. */
410 static struct Lisp_Overlay
*
411 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
414 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
416 XSETBUFFER (buffer
, b
);
418 for (; list
; list
= list
->next
)
420 Lisp_Object overlay
, start
, end
, old_overlay
;
423 XSETMISC (old_overlay
, list
);
424 charpos
= marker_position (OVERLAY_START (old_overlay
));
425 start
= Fmake_marker ();
426 Fset_marker (start
, make_number (charpos
), buffer
);
427 XMARKER (start
)->insertion_type
428 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
430 charpos
= marker_position (OVERLAY_END (old_overlay
));
431 end
= Fmake_marker ();
432 Fset_marker (end
, make_number (charpos
), buffer
);
433 XMARKER (end
)->insertion_type
434 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
436 overlay
= allocate_misc ();
437 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
438 OVERLAY_START (overlay
) = start
;
439 OVERLAY_END (overlay
) = end
;
440 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
441 XOVERLAY (overlay
)->next
= NULL
;
444 tail
= tail
->next
= XOVERLAY (overlay
);
446 result
= tail
= XOVERLAY (overlay
);
453 /* Clone per-buffer values of buffer FROM.
455 Buffer TO gets the same per-buffer values as FROM, with the
456 following exceptions: (1) TO's name is left untouched, (2) markers
457 are copied and made to refer to TO, and (3) overlay lists are
461 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
463 Lisp_Object to_buffer
;
466 XSETBUFFER (to_buffer
, to
);
468 for_each_per_buffer_object_at (offset
)
472 /* Don't touch the `name' which should be unique for every buffer. */
473 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
476 obj
= PER_BUFFER_VALUE (from
, offset
);
477 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
479 struct Lisp_Marker
*m
= XMARKER (obj
);
480 obj
= Fmake_marker ();
481 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
482 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
485 PER_BUFFER_VALUE (to
, offset
) = obj
;
488 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
490 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
491 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
493 /* Get (a copy of) the alist of Lisp-level local variables of FROM
494 and install that in TO. */
495 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
499 /* If buffer B has markers to record PT, BEGV and ZV when it is not
500 current, update these markers. */
503 record_buffer_markers (struct buffer
*b
)
505 if (! NILP (BVAR (b
, pt_marker
)))
509 eassert (!NILP (BVAR (b
, begv_marker
)));
510 eassert (!NILP (BVAR (b
, zv_marker
)));
512 XSETBUFFER (buffer
, b
);
513 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
514 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
515 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
520 /* If buffer B has markers to record PT, BEGV and ZV when it is not
521 current, fetch these values into B->begv etc. */
524 fetch_buffer_markers (struct buffer
*b
)
526 if (! NILP (BVAR (b
, pt_marker
)))
530 eassert (!NILP (BVAR (b
, begv_marker
)));
531 eassert (!NILP (BVAR (b
, zv_marker
)));
533 m
= BVAR (b
, pt_marker
);
534 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
536 m
= BVAR (b
, begv_marker
);
537 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
539 m
= BVAR (b
, zv_marker
);
540 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
545 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
547 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
548 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
549 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
550 NAME should be a string which is not the name of an existing buffer.
551 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
552 such as major and minor modes, in the indirect buffer.
553 CLONE nil means the indirect buffer's state is reset to default values. */)
554 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
556 Lisp_Object buf
, tem
;
560 buf
= Fget_buffer (name
);
562 error ("Buffer name `%s' is in use", SDATA (name
));
565 base_buffer
= Fget_buffer (base_buffer
);
566 if (NILP (base_buffer
))
567 error ("No such buffer: `%s'", SDATA (tem
));
568 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
569 error ("Base buffer has been killed");
571 if (SCHARS (name
) == 0)
572 error ("Empty string for buffer name is not allowed");
574 b
= allocate_buffer ();
576 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
577 ? XBUFFER (base_buffer
)->base_buffer
578 : XBUFFER (base_buffer
));
580 /* Use the base buffer's text object. */
581 b
->text
= b
->base_buffer
->text
;
583 b
->pt
= b
->base_buffer
->pt
;
584 b
->begv
= b
->base_buffer
->begv
;
585 b
->zv
= b
->base_buffer
->zv
;
586 b
->pt_byte
= b
->base_buffer
->pt_byte
;
587 b
->begv_byte
= b
->base_buffer
->begv_byte
;
588 b
->zv_byte
= b
->base_buffer
->zv_byte
;
590 b
->newline_cache
= 0;
591 b
->width_run_cache
= 0;
592 BVAR (b
, width_table
) = Qnil
;
594 /* Put this on the chain of all buffers including killed ones. */
595 b
->header
.next
.buffer
= all_buffers
;
598 name
= Fcopy_sequence (name
);
599 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
600 BVAR (b
, name
) = name
;
603 reset_buffer_local_variables (b
, 1);
605 /* Put this in the alist of all live buffers. */
607 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
609 BVAR (b
, mark
) = Fmake_marker ();
611 /* The multibyte status belongs to the base buffer. */
612 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
614 /* Make sure the base buffer has markers for its narrowing. */
615 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
617 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
618 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
620 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
621 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
623 b
->base_buffer
->pt_byte
);
625 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
626 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
627 b
->base_buffer
->begv
,
628 b
->base_buffer
->begv_byte
);
630 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
631 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
633 b
->base_buffer
->zv_byte
);
634 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
639 /* Give the indirect buffer markers for its narrowing. */
640 BVAR (b
, pt_marker
) = Fmake_marker ();
641 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
642 BVAR (b
, begv_marker
) = Fmake_marker ();
643 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
644 BVAR (b
, zv_marker
) = Fmake_marker ();
645 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
646 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
650 struct buffer
*old_b
= current_buffer
;
652 clone_per_buffer_values (b
->base_buffer
, b
);
653 BVAR (b
, filename
) = Qnil
;
654 BVAR (b
, file_truename
) = Qnil
;
655 BVAR (b
, display_count
) = make_number (0);
656 BVAR (b
, backed_up
) = Qnil
;
657 BVAR (b
, auto_save_file_name
) = Qnil
;
658 set_buffer_internal_1 (b
);
659 Fset (intern ("buffer-save-without-query"), Qnil
);
660 Fset (intern ("buffer-file-number"), Qnil
);
661 Fset (intern ("buffer-stale-function"), Qnil
);
662 set_buffer_internal_1 (old_b
);
665 /* Run buffer-list-update-hook. */
666 if (!NILP (Vrun_hooks
))
667 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
673 delete_all_overlays (struct buffer
*b
)
677 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
678 have to empty the list, otherwise we end up with overlays that
679 think they belong to this buffer while the buffer doesn't know about
681 while (b
->overlays_before
)
683 XSETMISC (overlay
, b
->overlays_before
);
684 Fdelete_overlay (overlay
);
686 while (b
->overlays_after
)
688 XSETMISC (overlay
, b
->overlays_after
);
689 Fdelete_overlay (overlay
);
691 eassert (b
->overlays_before
== NULL
);
692 eassert (b
->overlays_after
== NULL
);
695 /* Reinitialize everything about a buffer except its name and contents
697 If called on an already-initialized buffer, the list of overlays
698 should be deleted before calling this function, otherwise we end up
699 with overlays that claim to belong to the buffer but the buffer
700 claims it doesn't belong to it. */
703 reset_buffer (register struct buffer
*b
)
705 BVAR (b
, filename
) = Qnil
;
706 BVAR (b
, file_truename
) = Qnil
;
707 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
708 EMACS_SET_SECS_NSECS (b
->modtime
, 0, UNKNOWN_MODTIME_NSECS
);
709 b
->modtime_size
= -1;
710 XSETFASTINT (BVAR (b
, save_length
), 0);
711 b
->last_window_start
= 1;
712 /* It is more conservative to start out "changed" than "unchanged". */
714 b
->prevent_redisplay_optimizations_p
= 1;
715 BVAR (b
, backed_up
) = Qnil
;
716 BUF_AUTOSAVE_MODIFF (b
) = 0;
717 b
->auto_save_failure_time
= 0;
718 BVAR (b
, auto_save_file_name
) = Qnil
;
719 BVAR (b
, read_only
) = Qnil
;
720 b
->overlays_before
= NULL
;
721 b
->overlays_after
= NULL
;
722 b
->overlay_center
= BEG
;
723 BVAR (b
, mark_active
) = Qnil
;
724 BVAR (b
, point_before_scroll
) = Qnil
;
725 BVAR (b
, file_format
) = Qnil
;
726 BVAR (b
, auto_save_file_format
) = Qt
;
727 BVAR (b
, last_selected_window
) = Qnil
;
728 XSETINT (BVAR (b
, display_count
), 0);
729 BVAR (b
, display_time
) = Qnil
;
730 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
731 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
732 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
734 b
->display_error_modiff
= 0;
737 /* Reset buffer B's local variables info.
738 Don't use this on a buffer that has already been in use;
739 it does not treat permanent locals consistently.
740 Instead, use Fkill_all_local_variables.
742 If PERMANENT_TOO is 1, then we reset permanent
743 buffer-local variables. If PERMANENT_TOO is 0,
744 we preserve those. */
747 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
752 /* Reset the major mode to Fundamental, together with all the
753 things that depend on the major mode.
754 default-major-mode is handled at a higher level.
755 We ignore it here. */
756 BVAR (b
, major_mode
) = Qfundamental_mode
;
757 BVAR (b
, keymap
) = Qnil
;
758 BVAR (b
, mode_name
) = QSFundamental
;
759 BVAR (b
, minor_modes
) = Qnil
;
761 /* If the standard case table has been altered and invalidated,
762 fix up its insides first. */
763 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
764 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
765 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
766 Fset_standard_case_table (Vascii_downcase_table
);
768 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
769 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
770 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
771 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
772 BVAR (b
, invisibility_spec
) = Qt
;
774 /* Reset all (or most) per-buffer variables to their defaults. */
776 BVAR (b
, local_var_alist
) = Qnil
;
779 Lisp_Object tmp
, prop
, last
= Qnil
;
780 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
781 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
783 /* If permanent-local, keep it. */
785 if (EQ (prop
, Qpermanent_local_hook
))
787 /* This is a partially permanent hook variable.
788 Preserve only the elements that want to be preserved. */
789 Lisp_Object list
, newlist
;
790 list
= XCDR (XCAR (tmp
));
794 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
796 Lisp_Object elt
= XCAR (list
);
797 /* Preserve element ELT if it's t,
798 if it is a function with a `permanent-local-hook' property,
799 or if it's not a symbol. */
802 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
803 newlist
= Fcons (elt
, newlist
);
805 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
808 /* Delete this local variable. */
809 else if (NILP (last
))
810 BVAR (b
, local_var_alist
) = XCDR (tmp
);
812 XSETCDR (last
, XCDR (tmp
));
815 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
816 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
817 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
819 /* For each slot that has a default value, copy that into the slot. */
820 for_each_per_buffer_object_at (offset
)
822 int idx
= PER_BUFFER_IDX (offset
);
825 || buffer_permanent_local_flags
[idx
] == 0)))
826 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
830 /* We split this away from generate-new-buffer, because rename-buffer
831 and set-visited-file-name ought to be able to use this to really
832 rename the buffer properly. */
834 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
835 Sgenerate_new_buffer_name
, 1, 2, 0,
836 doc
: /* Return a string that is the name of no existing buffer based on NAME.
837 If there is no live buffer named NAME, then return NAME.
838 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
839 \(starting at 2) until an unused name is found, and then return that name.
840 Optional second argument IGNORE specifies a name that is okay to use (if
841 it is in the sequence to be tried) even if a buffer with that name exists. */)
842 (register Lisp_Object name
, Lisp_Object ignore
)
844 register Lisp_Object gentemp
, tem
;
846 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
850 tem
= Fstring_equal (name
, ignore
);
853 tem
= Fget_buffer (name
);
860 sprintf (number
, "<%"pD
"d>", ++count
);
861 gentemp
= concat2 (name
, build_string (number
));
862 tem
= Fstring_equal (gentemp
, ignore
);
865 tem
= Fget_buffer (gentemp
);
872 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
873 doc
: /* Return the name of BUFFER, as a string.
874 BUFFER defaults to the current buffer.
875 Return nil if BUFFER has been killed. */)
876 (register Lisp_Object buffer
)
879 return BVAR (current_buffer
, name
);
880 CHECK_BUFFER (buffer
);
881 return BVAR (XBUFFER (buffer
), name
);
884 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
885 doc
: /* Return name of file BUFFER is visiting, or nil if none.
886 No argument or nil as argument means use the current buffer. */)
887 (register Lisp_Object buffer
)
890 return BVAR (current_buffer
, filename
);
891 CHECK_BUFFER (buffer
);
892 return BVAR (XBUFFER (buffer
), filename
);
895 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
897 doc
: /* Return the base buffer of indirect buffer BUFFER.
898 If BUFFER is not indirect, return nil.
899 BUFFER defaults to the current buffer. */)
900 (register Lisp_Object buffer
)
903 Lisp_Object base_buffer
;
906 base
= current_buffer
->base_buffer
;
909 CHECK_BUFFER (buffer
);
910 base
= XBUFFER (buffer
)->base_buffer
;
915 XSETBUFFER (base_buffer
, base
);
919 DEFUN ("buffer-local-value", Fbuffer_local_value
,
920 Sbuffer_local_value
, 2, 2, 0,
921 doc
: /* Return the value of VARIABLE in BUFFER.
922 If VARIABLE does not have a buffer-local binding in BUFFER, the value
923 is the default binding of the variable. */)
924 (register Lisp_Object variable
, register Lisp_Object buffer
)
926 register Lisp_Object result
= buffer_local_value_1 (variable
, buffer
);
928 if (EQ (result
, Qunbound
))
929 xsignal1 (Qvoid_variable
, variable
);
935 /* Like Fbuffer_local_value, but return Qunbound if the variable is
939 buffer_local_value_1 (Lisp_Object variable
, Lisp_Object buffer
)
941 register struct buffer
*buf
;
942 register Lisp_Object result
;
943 struct Lisp_Symbol
*sym
;
945 CHECK_SYMBOL (variable
);
946 CHECK_BUFFER (buffer
);
947 buf
= XBUFFER (buffer
);
948 sym
= XSYMBOL (variable
);
951 switch (sym
->redirect
)
953 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
954 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
955 case SYMBOL_LOCALIZED
:
956 { /* Look in local_var_alist. */
957 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
958 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
959 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
963 { /* What binding is loaded right now? */
964 Lisp_Object current_alist_element
= blv
->valcell
;
966 /* The value of the currently loaded binding is not
967 stored in it, but rather in the realvalue slot.
968 Store that value into the binding it belongs to
969 in case that is the one we are about to use. */
971 XSETCDR (current_alist_element
,
972 do_symval_forwarding (blv
->fwd
));
974 /* Now get the (perhaps updated) value out of the binding. */
975 result
= XCDR (result
);
978 result
= Fdefault_value (variable
);
981 case SYMBOL_FORWARDED
:
983 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
984 if (BUFFER_OBJFWDP (fwd
))
985 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
987 result
= Fdefault_value (variable
);
996 /* Return an alist of the Lisp-level buffer-local bindings of
997 buffer BUF. That is, don't include the variables maintained
998 in special slots in the buffer object. */
1001 buffer_lisp_local_variables (struct buffer
*buf
)
1003 Lisp_Object result
= Qnil
;
1004 register Lisp_Object tail
;
1005 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1007 Lisp_Object val
, elt
;
1011 /* Reference each variable in the alist in buf.
1012 If inquiring about the current buffer, this gets the current values,
1013 so store them into the alist so the alist is up to date.
1014 If inquiring about some other buffer, this swaps out any values
1015 for that buffer, making the alist up to date automatically. */
1016 val
= find_symbol_value (XCAR (elt
));
1017 /* Use the current buffer value only if buf is the current buffer. */
1018 if (buf
!= current_buffer
)
1021 result
= Fcons (EQ (val
, Qunbound
)
1023 : Fcons (XCAR (elt
), val
),
1030 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1031 Sbuffer_local_variables
, 0, 1, 0,
1032 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1033 Most elements look like (SYMBOL . VALUE), describing one variable.
1034 For a symbol that is locally unbound, just the symbol appears in the value.
1035 Note that storing new VALUEs in these elements doesn't change the variables.
1036 No argument or nil as argument means use current buffer as BUFFER. */)
1037 (register Lisp_Object buffer
)
1039 register struct buffer
*buf
;
1040 register Lisp_Object result
;
1043 buf
= current_buffer
;
1046 CHECK_BUFFER (buffer
);
1047 buf
= XBUFFER (buffer
);
1050 result
= buffer_lisp_local_variables (buf
);
1052 /* Add on all the variables stored in special slots. */
1056 for_each_per_buffer_object_at (offset
)
1058 idx
= PER_BUFFER_IDX (offset
);
1059 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1060 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1062 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1063 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1064 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1073 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1075 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1076 No argument or nil as argument means use current buffer as BUFFER. */)
1077 (register Lisp_Object buffer
)
1079 register struct buffer
*buf
;
1081 buf
= current_buffer
;
1084 CHECK_BUFFER (buffer
);
1085 buf
= XBUFFER (buffer
);
1088 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1091 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1093 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1094 A non-nil FLAG means mark the buffer modified. */)
1095 (register Lisp_Object flag
)
1097 register int already
;
1098 register Lisp_Object fn
;
1099 Lisp_Object buffer
, window
;
1101 #ifdef CLASH_DETECTION
1102 /* If buffer becoming modified, lock the file.
1103 If buffer becoming unmodified, unlock the file. */
1105 fn
= BVAR (current_buffer
, file_truename
);
1106 /* Test buffer-file-name so that binding it to nil is effective. */
1107 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1109 already
= SAVE_MODIFF
< MODIFF
;
1110 if (!already
&& !NILP (flag
))
1112 else if (already
&& NILP (flag
))
1115 #endif /* CLASH_DETECTION */
1117 /* Here we have a problem. SAVE_MODIFF is used here to encode
1118 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1119 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1120 modify SAVE_MODIFF to affect one, we may affect the other
1122 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1123 if SAVE_MODIFF<auto_save_modified that means we risk changing
1124 recent-auto-save-p from t to nil.
1125 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1126 we risk changing recent-auto-save-p from nil to t. */
1127 SAVE_MODIFF
= (NILP (flag
)
1128 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1130 /* Let's try to preserve recent-auto-save-p. */
1131 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1132 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1133 we can either decrease SAVE_MODIFF and auto_save_modified
1134 or increase MODIFF. */
1137 /* Set update_mode_lines only if buffer is displayed in some window.
1138 Packages like jit-lock or lazy-lock preserve a buffer's modified
1139 state by recording/restoring the state around blocks of code.
1140 Setting update_mode_lines makes redisplay consider all windows
1141 (on all frames). Stealth fontification of buffers not displayed
1142 would incur additional redisplay costs if we'd set
1143 update_modes_lines unconditionally.
1145 Ideally, I think there should be another mechanism for fontifying
1146 buffers without "modifying" buffers, or redisplay should be
1147 smarter about updating the `*' in mode lines. --gerd */
1148 XSETBUFFER (buffer
, current_buffer
);
1149 window
= Fget_buffer_window (buffer
, Qt
);
1150 if (WINDOWP (window
))
1152 ++update_mode_lines
;
1153 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1159 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1160 Srestore_buffer_modified_p
, 1, 1, 0,
1161 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1162 It is not ensured that mode lines will be updated to show the modified
1163 state of the current buffer. Use with care. */)
1166 #ifdef CLASH_DETECTION
1169 /* If buffer becoming modified, lock the file.
1170 If buffer becoming unmodified, unlock the file. */
1172 fn
= BVAR (current_buffer
, file_truename
);
1173 /* Test buffer-file-name so that binding it to nil is effective. */
1174 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1176 int already
= SAVE_MODIFF
< MODIFF
;
1177 if (!already
&& !NILP (flag
))
1179 else if (already
&& NILP (flag
))
1182 #endif /* CLASH_DETECTION */
1184 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1188 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1190 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1191 Each buffer has a tick counter which is incremented each time the
1192 text in that buffer is changed. It wraps around occasionally.
1193 No argument or nil as argument means use current buffer as BUFFER. */)
1194 (register Lisp_Object buffer
)
1196 register struct buffer
*buf
;
1198 buf
= current_buffer
;
1201 CHECK_BUFFER (buffer
);
1202 buf
= XBUFFER (buffer
);
1205 return make_number (BUF_MODIFF (buf
));
1208 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1209 Sbuffer_chars_modified_tick
, 0, 1, 0,
1210 doc
: /* Return BUFFER's character-change tick counter.
1211 Each buffer has a character-change tick counter, which is set to the
1212 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1213 time text in that buffer is inserted or deleted. By comparing the
1214 values returned by two individual calls of `buffer-chars-modified-tick',
1215 you can tell whether a character change occurred in that buffer in
1216 between these calls. No argument or nil as argument means use current
1217 buffer as BUFFER. */)
1218 (register Lisp_Object buffer
)
1220 register struct buffer
*buf
;
1222 buf
= current_buffer
;
1225 CHECK_BUFFER (buffer
);
1226 buf
= XBUFFER (buffer
);
1229 return make_number (BUF_CHARS_MODIFF (buf
));
1232 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1233 "(list (read-string \"Rename buffer (to new name): \" \
1234 nil 'buffer-name-history (buffer-name (current-buffer))) \
1235 current-prefix-arg)",
1236 doc
: /* Change current buffer's name to NEWNAME (a string).
1237 If second arg UNIQUE is nil or omitted, it is an error if a
1238 buffer named NEWNAME already exists.
1239 If UNIQUE is non-nil, come up with a new name using
1240 `generate-new-buffer-name'.
1241 Interactively, you can set UNIQUE with a prefix argument.
1242 We return the name we actually gave the buffer.
1243 This does not change the name of the visited file (if any). */)
1244 (register Lisp_Object newname
, Lisp_Object unique
)
1246 register Lisp_Object tem
, buf
;
1248 CHECK_STRING (newname
);
1250 if (SCHARS (newname
) == 0)
1251 error ("Empty string is invalid as a buffer name");
1253 tem
= Fget_buffer (newname
);
1256 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1257 rename the buffer automatically so you can create another
1258 with the original name. It makes UNIQUE equivalent to
1259 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1260 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1261 return BVAR (current_buffer
, name
);
1263 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1265 error ("Buffer name `%s' is in use", SDATA (newname
));
1268 BVAR (current_buffer
, name
) = newname
;
1270 /* Catch redisplay's attention. Unless we do this, the mode lines for
1271 any windows displaying current_buffer will stay unchanged. */
1272 update_mode_lines
++;
1274 XSETBUFFER (buf
, current_buffer
);
1275 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1276 if (NILP (BVAR (current_buffer
, filename
))
1277 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1278 call0 (intern ("rename-auto-save-file"));
1280 /* Run buffer-list-update-hook. */
1281 if (!NILP (Vrun_hooks
))
1282 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1284 /* Refetch since that last call may have done GC. */
1285 return BVAR (current_buffer
, name
);
1288 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1289 doc
: /* Return most recently selected buffer other than BUFFER.
1290 Buffers not visible in windows are preferred to visible buffers, unless
1291 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1292 BUFFER unless it denotes a live buffer. If the optional third argument
1293 FRAME is non-nil, use that frame's buffer list instead of the selected
1294 frame's buffer list.
1296 The buffer is found by scanning the selected or specified frame's buffer
1297 list first, followed by the list of all buffers. If no other buffer
1298 exists, return the buffer `*scratch*' (creating it if necessary). */)
1299 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1301 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1302 Lisp_Object tail
, buf
, pred
;
1303 Lisp_Object notsogood
= Qnil
;
1306 frame
= selected_frame
;
1308 CHECK_FRAME (frame
);
1310 pred
= frame_buffer_predicate (frame
);
1311 /* Consider buffers that have been seen in the frame first. */
1312 tail
= XFRAME (frame
)->buffer_list
;
1313 for (; CONSP (tail
); tail
= XCDR (tail
))
1316 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1317 && !NILP (BVAR (XBUFFER (buf
), name
))
1318 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1319 /* If the frame has a buffer_predicate, disregard buffers that
1320 don't fit the predicate. */
1321 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1323 if (!NILP (visible_ok
)
1324 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1326 else if (NILP (notsogood
))
1331 /* Consider alist of all buffers next. */
1332 tail
= Vbuffer_alist
;
1333 for (; CONSP (tail
); tail
= XCDR (tail
))
1335 buf
= Fcdr (XCAR (tail
));
1336 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1337 && !NILP (BVAR (XBUFFER (buf
), name
))
1338 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1339 /* If the frame has a buffer_predicate, disregard buffers that
1340 don't fit the predicate. */
1341 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1343 if (!NILP (visible_ok
)
1344 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1346 else if (NILP (notsogood
))
1351 if (!NILP (notsogood
))
1355 buf
= Fget_buffer (build_string ("*scratch*"));
1358 buf
= Fget_buffer_create (build_string ("*scratch*"));
1359 Fset_buffer_major_mode (buf
);
1365 /* The following function is a safe variant of Fother_buffer: It doesn't
1366 pay attention to any frame-local buffer lists, doesn't care about
1367 visibility of buffers, and doesn't evaluate any frame predicates. */
1370 other_buffer_safely (Lisp_Object buffer
)
1372 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1373 Lisp_Object tail
, buf
;
1375 tail
= Vbuffer_alist
;
1376 for (; CONSP (tail
); tail
= XCDR (tail
))
1378 buf
= Fcdr (XCAR (tail
));
1379 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1380 && !NILP (BVAR (XBUFFER (buf
), name
))
1381 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1385 buf
= Fget_buffer (build_string ("*scratch*"));
1388 buf
= Fget_buffer_create (build_string ("*scratch*"));
1389 Fset_buffer_major_mode (buf
);
1395 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1397 doc
: /* Start keeping undo information for buffer BUFFER.
1398 No argument or nil as argument means do this for the current buffer. */)
1399 (register Lisp_Object buffer
)
1401 Lisp_Object real_buffer
;
1404 XSETBUFFER (real_buffer
, current_buffer
);
1407 real_buffer
= Fget_buffer (buffer
);
1408 if (NILP (real_buffer
))
1412 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1413 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1419 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1420 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1421 The buffer being killed will be current while the hook is running.\n\
1423 Functions run by this hook are supposed to not change the current
1424 buffer. See `kill-buffer'."
1426 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1427 doc
: /* Kill the buffer specified by BUFFER-OR-NAME.
1428 The argument may be a buffer or the name of an existing buffer.
1429 Argument nil or omitted means kill the current buffer. Return t if the
1430 buffer is actually killed, nil otherwise.
1432 The functions in `kill-buffer-query-functions' are called with the
1433 buffer to be killed as the current buffer. If any of them returns nil,
1434 the buffer is not killed. The hook `kill-buffer-hook' is run before the
1435 buffer is actually killed. The buffer being killed will be current
1436 while the hook is running. Functions called by any of these hooks are
1437 supposed to not change the current buffer.
1439 Any processes that have this buffer as the `process-buffer' are killed
1440 with SIGHUP. This function calls `replace-buffer-in-windows' for
1441 cleaning up all windows currently displaying the buffer to be killed. */)
1442 (Lisp_Object buffer_or_name
)
1445 register struct buffer
*b
;
1446 register Lisp_Object tem
;
1447 register struct Lisp_Marker
*m
;
1448 struct gcpro gcpro1
;
1450 if (NILP (buffer_or_name
))
1451 buffer
= Fcurrent_buffer ();
1453 buffer
= Fget_buffer (buffer_or_name
);
1455 nsberror (buffer_or_name
);
1457 b
= XBUFFER (buffer
);
1459 /* Avoid trouble for buffer already dead. */
1460 if (NILP (BVAR (b
, name
)))
1463 /* Query if the buffer is still modified. */
1464 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1465 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1468 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1469 BVAR (b
, name
), make_number (0)));
1475 /* Run hooks with the buffer to be killed the current buffer. */
1477 ptrdiff_t count
= SPECPDL_INDEX ();
1478 Lisp_Object arglist
[1];
1480 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1481 set_buffer_internal (b
);
1483 /* First run the query functions; if any query is answered no,
1484 don't kill the buffer. */
1485 arglist
[0] = Qkill_buffer_query_functions
;
1486 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1488 return unbind_to (count
, Qnil
);
1490 /* Then run the hooks. */
1491 Frun_hooks (1, &Qkill_buffer_hook
);
1492 unbind_to (count
, Qnil
);
1495 /* If the hooks have killed the buffer, exit now. */
1496 if (NILP (BVAR (b
, name
)))
1499 /* We have no more questions to ask. Verify that it is valid
1500 to kill the buffer. This must be done after the questions
1501 since anything can happen within do_yes_or_no_p. */
1503 /* Don't kill the minibuffer now current. */
1504 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1507 /* When we kill a base buffer, kill all its indirect buffers.
1508 We do it at this stage so nothing terrible happens if they
1509 ask questions or their hooks get errors. */
1510 if (! b
->base_buffer
)
1512 struct buffer
*other
;
1516 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1517 /* all_buffers contains dead buffers too;
1518 don't re-kill them. */
1519 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1522 XSETBUFFER (buf
, other
);
1528 /* Exit if we now have killed the base buffer (Bug#11665). */
1529 if (NILP (BVAR (b
, name
)))
1533 /* Run replace_buffer_in_windows before making another buffer current
1534 since set-window-buffer-start-and-point will refuse to make another
1535 buffer current if the selected window does not show the current
1536 buffer. (Bug#10114) */
1537 replace_buffer_in_windows (buffer
);
1539 /* Exit if replacing the buffer in windows has killed our buffer. */
1540 if (NILP (BVAR (b
, name
)))
1543 /* Make this buffer not be current. Exit if it is the sole visible
1545 if (b
== current_buffer
)
1547 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1549 if (b
== current_buffer
)
1553 /* If the buffer now current is shown in the minibuffer and our buffer
1554 is the sole other buffer give up. */
1555 XSETBUFFER (tem
, current_buffer
);
1556 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
)
1557 && EQ (buffer
, Fother_buffer (buffer
, Qnil
, Qnil
)))
1560 /* Now there is no question: we can kill the buffer. */
1562 #ifdef CLASH_DETECTION
1563 /* Unlock this buffer's file, if it is locked. */
1565 #endif /* CLASH_DETECTION */
1568 kill_buffer_processes (buffer
);
1571 /* Killing buffer processes may run sentinels which may have killed
1573 if (NILP (BVAR (b
, name
)))
1576 /* These may run Lisp code and into infinite loops (if someone
1577 insisted on circular lists) so allow quitting here. */
1578 frames_discard_buffer (buffer
);
1580 clear_charpos_cache (b
);
1582 tem
= Vinhibit_quit
;
1584 /* Remove the buffer from the list of all buffers. */
1585 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1586 /* If replace_buffer_in_windows didn't do its job fix that now. */
1587 replace_buffer_in_windows_safely (buffer
);
1588 Vinhibit_quit
= tem
;
1590 /* Delete any auto-save file, if we saved it in this session.
1591 But not if the buffer is modified. */
1592 if (STRINGP (BVAR (b
, auto_save_file_name
))
1593 && BUF_AUTOSAVE_MODIFF (b
) != 0
1594 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1595 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1596 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1599 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1600 if (! NILP (delete))
1601 internal_delete_file (BVAR (b
, auto_save_file_name
));
1604 /* Deleting an auto-save file could have killed our buffer. */
1605 if (NILP (BVAR (b
, name
)))
1610 /* Unchain all markers that belong to this indirect buffer.
1611 Don't unchain the markers that belong to the base buffer
1612 or its other indirect buffers. */
1613 for (m
= BUF_MARKERS (b
); m
; )
1615 struct Lisp_Marker
*next
= m
->next
;
1623 /* Unchain all markers of this buffer and its indirect buffers.
1624 and leave them pointing nowhere. */
1625 for (m
= BUF_MARKERS (b
); m
; )
1627 struct Lisp_Marker
*next
= m
->next
;
1632 BUF_MARKERS (b
) = NULL
;
1633 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1635 /* Perhaps we should explicitly free the interval tree here... */
1638 /* Reset the local variables, so that this buffer's local values
1639 won't be protected from GC. They would be protected
1640 if they happened to remain cached in their symbols.
1641 This gets rid of them for certain. */
1642 swap_out_buffer_local_variables (b
);
1643 reset_buffer_local_variables (b
, 1);
1645 BVAR (b
, name
) = Qnil
;
1648 if (! b
->base_buffer
)
1649 free_buffer_text (b
);
1651 if (b
->newline_cache
)
1653 free_region_cache (b
->newline_cache
);
1654 b
->newline_cache
= 0;
1656 if (b
->width_run_cache
)
1658 free_region_cache (b
->width_run_cache
);
1659 b
->width_run_cache
= 0;
1661 BVAR (b
, width_table
) = Qnil
;
1663 BVAR (b
, undo_list
) = Qnil
;
1665 /* Run buffer-list-update-hook. */
1666 if (!NILP (Vrun_hooks
))
1667 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1672 /* Move association for BUFFER to the front of buffer (a)lists. Since
1673 we do this each time BUFFER is selected visibly, the more recently
1674 selected buffers are always closer to the front of those lists. This
1675 means that other_buffer is more likely to choose a relevant buffer.
1677 Note that this moves BUFFER to the front of the buffer lists of the
1678 selected frame even if BUFFER is not shown there. If BUFFER is not
1679 shown in the selected frame, consider the present behavior a feature.
1680 `select-window' gets this right since it shows BUFFER in the selected
1681 window when calling us. */
1684 record_buffer (Lisp_Object buffer
)
1686 Lisp_Object aelt
, aelt_cons
, tem
;
1687 register struct frame
*f
= XFRAME (selected_frame
);
1689 CHECK_BUFFER (buffer
);
1691 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1692 Don't allow quitting since this might leave the buffer list in an
1693 inconsistent state. */
1694 tem
= Vinhibit_quit
;
1696 aelt
= Frassq (buffer
, Vbuffer_alist
);
1697 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1698 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1699 XSETCDR (aelt_cons
, Vbuffer_alist
);
1700 Vbuffer_alist
= aelt_cons
;
1701 Vinhibit_quit
= tem
;
1703 /* Update buffer list of selected frame. */
1704 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1705 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1707 /* Run buffer-list-update-hook. */
1708 if (!NILP (Vrun_hooks
))
1709 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1713 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1714 buffer is killed. For the selected frame's buffer list this moves
1715 BUFFER to its end even if it was never shown in that frame. If
1716 this happens we have a feature, hence `bury-buffer-internal' should be
1717 called only when BUFFER was shown in the selected frame. */
1719 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1721 doc
: /* Move BUFFER to the end of the buffer list. */)
1722 (Lisp_Object buffer
)
1724 Lisp_Object aelt
, aelt_cons
, tem
;
1725 register struct frame
*f
= XFRAME (selected_frame
);
1727 CHECK_BUFFER (buffer
);
1729 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1730 Don't allow quitting since this might leave the buffer list in an
1731 inconsistent state. */
1732 tem
= Vinhibit_quit
;
1734 aelt
= Frassq (buffer
, Vbuffer_alist
);
1735 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1736 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1737 XSETCDR (aelt_cons
, Qnil
);
1738 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1739 Vinhibit_quit
= tem
;
1741 /* Update buffer lists of selected frame. */
1742 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1743 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1745 /* Run buffer-list-update-hook. */
1746 if (!NILP (Vrun_hooks
))
1747 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1752 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1753 doc
: /* Set an appropriate major mode for BUFFER.
1754 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1755 according to `default-major-mode'.
1756 Use this function before selecting the buffer, since it may need to inspect
1757 the current buffer's major mode. */)
1758 (Lisp_Object buffer
)
1761 Lisp_Object function
;
1763 CHECK_BUFFER (buffer
);
1765 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1766 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1767 function
= find_symbol_value (intern ("initial-major-mode"));
1770 function
= BVAR (&buffer_defaults
, major_mode
);
1772 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1773 function
= BVAR (current_buffer
, major_mode
);
1776 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1779 count
= SPECPDL_INDEX ();
1781 /* To select a nonfundamental mode,
1782 select the buffer temporarily and then call the mode function. */
1784 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1786 Fset_buffer (buffer
);
1789 return unbind_to (count
, Qnil
);
1792 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1793 doc
: /* Return the current buffer as a Lisp object. */)
1796 register Lisp_Object buf
;
1797 XSETBUFFER (buf
, current_buffer
);
1801 /* Set the current buffer to B.
1803 We previously set windows_or_buffers_changed here to invalidate
1804 global unchanged information in beg_unchanged and end_unchanged.
1805 This is no longer necessary because we now compute unchanged
1806 information on a buffer-basis. Every action affecting other
1807 windows than the selected one requires a select_window at some
1808 time, and that increments windows_or_buffers_changed. */
1811 set_buffer_internal (register struct buffer
*b
)
1813 if (current_buffer
!= b
)
1814 set_buffer_internal_1 (b
);
1817 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1818 This is used by redisplay. */
1821 set_buffer_internal_1 (register struct buffer
*b
)
1823 register struct buffer
*old_buf
;
1824 register Lisp_Object tail
;
1826 #ifdef USE_MMAP_FOR_BUFFERS
1827 if (b
->text
->beg
== NULL
)
1828 enlarge_buffer_text (b
, 0);
1829 #endif /* USE_MMAP_FOR_BUFFERS */
1831 if (current_buffer
== b
)
1834 old_buf
= current_buffer
;
1836 last_known_column_point
= -1; /* invalidate indentation cache */
1840 /* Put the undo list back in the base buffer, so that it appears
1841 that an indirect buffer shares the undo list of its base. */
1842 if (old_buf
->base_buffer
)
1843 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1845 /* If the old current buffer has markers to record PT, BEGV and ZV
1846 when it is not current, update them now. */
1847 record_buffer_markers (old_buf
);
1850 /* Get the undo list from the base buffer, so that it appears
1851 that an indirect buffer shares the undo list of its base. */
1853 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1855 /* If the new current buffer has markers to record PT, BEGV and ZV
1856 when it is not current, fetch them now. */
1857 fetch_buffer_markers (b
);
1859 /* Look down buffer's list of local Lisp variables
1860 to find and update any that forward into C variables. */
1864 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1866 Lisp_Object var
= XCAR (XCAR (tail
));
1867 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1868 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1869 && SYMBOL_BLV (sym
)->fwd
)
1870 /* Just reference the variable
1871 to cause it to become set for this buffer. */
1872 Fsymbol_value (var
);
1875 /* Do the same with any others that were local to the previous buffer */
1876 while (b
!= old_buf
&& (b
= old_buf
, b
));
1879 /* Switch to buffer B temporarily for redisplay purposes.
1880 This avoids certain things that don't need to be done within redisplay. */
1883 set_buffer_temp (struct buffer
*b
)
1885 register struct buffer
*old_buf
;
1887 if (current_buffer
== b
)
1890 old_buf
= current_buffer
;
1893 /* If the old current buffer has markers to record PT, BEGV and ZV
1894 when it is not current, update them now. */
1895 record_buffer_markers (old_buf
);
1897 /* If the new current buffer has markers to record PT, BEGV and ZV
1898 when it is not current, fetch them now. */
1899 fetch_buffer_markers (b
);
1902 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1903 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1904 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1905 also `save-excursion' when you want to make a buffer current
1906 temporarily. This function does not display the buffer, so its effect
1907 ends when the current command terminates. Use `switch-to-buffer' or
1908 `pop-to-buffer' to switch buffers permanently. */)
1909 (register Lisp_Object buffer_or_name
)
1911 register Lisp_Object buffer
;
1912 buffer
= Fget_buffer (buffer_or_name
);
1914 nsberror (buffer_or_name
);
1915 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1916 error ("Selecting deleted buffer");
1917 set_buffer_internal (XBUFFER (buffer
));
1921 /* Set the current buffer to BUFFER provided it is alive. */
1924 set_buffer_if_live (Lisp_Object buffer
)
1926 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1927 Fset_buffer (buffer
);
1931 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1932 Sbarf_if_buffer_read_only
, 0, 0, 0,
1933 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1936 if (!NILP (BVAR (current_buffer
, read_only
))
1937 && NILP (Vinhibit_read_only
))
1938 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1942 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1943 doc
: /* Delete the entire contents of the current buffer.
1944 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1945 so the buffer is truly empty after this. */)
1952 current_buffer
->last_window_start
= 1;
1953 /* Prevent warnings, or suspension of auto saving, that would happen
1954 if future size is less than past size. Use of erase-buffer
1955 implies that the future text is not really related to the past text. */
1956 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1961 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1963 CHECK_NUMBER_COERCE_MARKER (*b
);
1964 CHECK_NUMBER_COERCE_MARKER (*e
);
1966 if (XINT (*b
) > XINT (*e
))
1969 tem
= *b
; *b
= *e
; *e
= tem
;
1972 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
1973 args_out_of_range (*b
, *e
);
1976 /* Advance BYTE_POS up to a character boundary
1977 and return the adjusted position. */
1980 advance_to_char_boundary (ptrdiff_t byte_pos
)
1984 if (byte_pos
== BEG
)
1985 /* Beginning of buffer is always a character boundary. */
1988 c
= FETCH_BYTE (byte_pos
);
1989 if (! CHAR_HEAD_P (c
))
1991 /* We should advance BYTE_POS only when C is a constituent of a
1992 multibyte sequence. */
1993 ptrdiff_t orig_byte_pos
= byte_pos
;
1998 c
= FETCH_BYTE (byte_pos
);
2000 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2002 if (byte_pos
< orig_byte_pos
)
2003 byte_pos
= orig_byte_pos
;
2004 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2005 surely advance to the correct character boundary. If C is
2006 not, BYTE_POS was unchanged. */
2012 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2014 doc
: /* Swap the text between current buffer and BUFFER. */)
2015 (Lisp_Object buffer
)
2017 struct buffer
*other_buffer
;
2018 CHECK_BUFFER (buffer
);
2019 other_buffer
= XBUFFER (buffer
);
2021 if (NILP (BVAR (other_buffer
, name
)))
2022 error ("Cannot swap a dead buffer's text");
2024 /* Actually, it probably works just fine.
2025 * if (other_buffer == current_buffer)
2026 * error ("Cannot swap a buffer's text with itself"); */
2028 /* Actually, this may be workable as well, tho probably only if they're
2030 if (other_buffer
->base_buffer
2031 || current_buffer
->base_buffer
)
2032 error ("Cannot swap indirect buffers's text");
2034 { /* This is probably harder to make work. */
2035 struct buffer
*other
;
2036 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2037 if (other
->base_buffer
== other_buffer
2038 || other
->base_buffer
== current_buffer
)
2039 error ("One of the buffers to swap has indirect buffers");
2042 #define swapfield(field, type) \
2044 type tmp##field = other_buffer->field; \
2045 other_buffer->field = current_buffer->field; \
2046 current_buffer->field = tmp##field; \
2048 #define swapfield_(field, type) \
2050 type tmp##field = BVAR (other_buffer, field); \
2051 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2052 BVAR (current_buffer, field) = tmp##field; \
2055 swapfield (own_text
, struct buffer_text
);
2056 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2057 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2059 r_alloc_reset_variable ((void **) ¤t_buffer
->own_text
.beg
,
2060 (void **) &other_buffer
->own_text
.beg
);
2061 r_alloc_reset_variable ((void **) &other_buffer
->own_text
.beg
,
2062 (void **) ¤t_buffer
->own_text
.beg
);
2063 #endif /* REL_ALLOC */
2065 swapfield (pt
, ptrdiff_t);
2066 swapfield (pt_byte
, ptrdiff_t);
2067 swapfield (begv
, ptrdiff_t);
2068 swapfield (begv_byte
, ptrdiff_t);
2069 swapfield (zv
, ptrdiff_t);
2070 swapfield (zv_byte
, ptrdiff_t);
2071 eassert (!current_buffer
->base_buffer
);
2072 eassert (!other_buffer
->base_buffer
);
2073 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2074 swapfield (newline_cache
, struct region_cache
*);
2075 swapfield (width_run_cache
, struct region_cache
*);
2076 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2077 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2078 swapfield (overlays_before
, struct Lisp_Overlay
*);
2079 swapfield (overlays_after
, struct Lisp_Overlay
*);
2080 swapfield (overlay_center
, ptrdiff_t);
2081 swapfield_ (undo_list
, Lisp_Object
);
2082 swapfield_ (mark
, Lisp_Object
);
2083 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2084 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2085 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2086 /* FIXME: Not sure what we should do with these *_marker fields.
2087 Hopefully they're just nil anyway. */
2088 swapfield_ (pt_marker
, Lisp_Object
);
2089 swapfield_ (begv_marker
, Lisp_Object
);
2090 swapfield_ (zv_marker
, Lisp_Object
);
2091 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2092 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2094 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2095 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2096 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2097 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2098 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2099 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2100 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2102 struct Lisp_Marker
*m
;
2103 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2104 if (m
->buffer
== other_buffer
)
2105 m
->buffer
= current_buffer
;
2107 /* Since there's no indirect buffer in sight, markers on
2108 BUF_MARKERS(buf) should either be for `buf' or dead. */
2109 eassert (!m
->buffer
);
2110 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2111 if (m
->buffer
== current_buffer
)
2112 m
->buffer
= other_buffer
;
2114 /* Since there's no indirect buffer in sight, markers on
2115 BUF_MARKERS(buf) should either be for `buf' or dead. */
2116 eassert (!m
->buffer
);
2118 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2119 So since we just swapped the markers between the two buffers, we need
2120 to undo the effect of this swap for window markers. */
2121 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2122 Lisp_Object buf1
, buf2
;
2123 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2125 while (NILP (Fmemq (w
, ws
)))
2128 if (MARKERP (XWINDOW (w
)->pointm
)
2129 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2130 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2131 Fset_marker (XWINDOW (w
)->pointm
,
2132 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2133 XWINDOW (w
)->buffer
);
2134 w
= Fnext_window (w
, Qt
, Qt
);
2138 if (current_buffer
->text
->intervals
)
2139 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2140 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2141 if (other_buffer
->text
->intervals
)
2142 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2143 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2148 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2150 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2151 If FLAG is t, this makes the buffer a multibyte buffer.
2152 If FLAG is nil, this makes the buffer a single-byte buffer.
2153 In these cases, the buffer contents remain unchanged as a sequence of
2154 bytes but the contents viewed as characters do change.
2155 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2156 all eight-bit bytes to eight-bit characters.
2157 If the multibyte flag was really changed, undo information of the
2158 current buffer is cleared. */)
2161 struct Lisp_Marker
*tail
, *markers
;
2162 struct buffer
*other
;
2164 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2165 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2166 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2167 struct gcpro gcpro1
;
2169 if (current_buffer
->base_buffer
)
2170 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2172 /* Do nothing if nothing actually changes. */
2173 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2178 /* Don't record these buffer changes. We will put a special undo entry
2180 BVAR (current_buffer
, undo_list
) = Qt
;
2182 /* If the cached position is for this buffer, clear it out. */
2183 clear_charpos_cache (current_buffer
);
2186 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2188 begv
= BEGV
, zv
= ZV
;
2195 ptrdiff_t pos
, stop
;
2198 /* Do this first, so it can use CHAR_TO_BYTE
2199 to calculate the old correspondences. */
2200 set_intervals_multibyte (0);
2202 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2208 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2211 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2212 tail
->charpos
= tail
->bytepos
;
2214 /* Convert multibyte form of 8-bit characters to unibyte. */
2229 if (ASCII_BYTE_P (*p
))
2231 else if (CHAR_BYTE8_HEAD_P (*p
))
2233 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2234 /* Delete all bytes for this 8-bit character but the
2235 last one, and change the last one to the character
2238 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2250 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2251 p
+= bytes
, pos
+= bytes
;
2255 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2260 ptrdiff_t pos
, stop
;
2261 unsigned char *p
, *pend
;
2263 /* Be sure not to have a multibyte sequence striding over the GAP.
2264 Ex: We change this: "...abc\302 _GAP_ \241def..."
2265 to: "...abc _GAP_ \302\241def..." */
2268 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2269 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2271 unsigned char *q
= GPT_ADDR
- 1;
2273 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2274 if (LEADING_CODE_P (*q
))
2276 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2278 move_gap_both (new_gpt
, new_gpt
);
2282 /* Make the buffer contents valid as multibyte by converting
2283 8-bit characters to multibyte form. */
2301 if (ASCII_BYTE_P (*p
))
2303 else if (EQ (flag
, Qt
)
2304 && ! CHAR_BYTE8_HEAD_P (*p
)
2305 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2306 p
+= bytes
, pos
+= bytes
;
2309 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2312 c
= BYTE8_TO_CHAR (*p
);
2313 bytes
= CHAR_STRING (c
, tmp
);
2315 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2317 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2318 /* Now the gap is after the just inserted data. */
2336 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2338 /* Do this first, so that chars_in_text asks the right question.
2339 set_intervals_multibyte needs it too. */
2340 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2342 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2343 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2345 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2347 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2348 if (BEGV_BYTE
> GPT_BYTE
)
2349 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2351 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2353 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2354 if (ZV_BYTE
> GPT_BYTE
)
2355 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2357 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2360 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2363 if (byte
> GPT_BYTE
)
2364 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2366 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2367 TEMP_SET_PT_BOTH (position
, byte
);
2370 tail
= markers
= BUF_MARKERS (current_buffer
);
2372 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2373 getting confused by the markers that have not yet been updated.
2374 It is also a signal that it should never create a marker. */
2375 BUF_MARKERS (current_buffer
) = NULL
;
2377 for (; tail
; tail
= tail
->next
)
2379 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2380 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2383 /* Make sure no markers were put on the chain
2384 while the chain value was incorrect. */
2385 if (BUF_MARKERS (current_buffer
))
2388 BUF_MARKERS (current_buffer
) = markers
;
2390 /* Do this last, so it can calculate the new correspondences
2391 between chars and bytes. */
2392 set_intervals_multibyte (1);
2395 if (!EQ (old_undo
, Qt
))
2397 /* Represent all the above changes by a special undo entry. */
2398 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2399 intern ("set-buffer-multibyte"),
2400 NILP (flag
) ? Qt
: Qnil
),
2406 /* Changing the multibyteness of a buffer means that all windows
2407 showing that buffer must be updated thoroughly. */
2408 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2409 ++windows_or_buffers_changed
;
2411 /* Copy this buffer's new multibyte status
2412 into all of its indirect buffers. */
2413 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2414 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2416 BVAR (other
, enable_multibyte_characters
)
2417 = BVAR (current_buffer
, enable_multibyte_characters
);
2418 other
->prevent_redisplay_optimizations_p
= 1;
2421 /* Restore the modifiedness of the buffer. */
2422 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2423 Fset_buffer_modified_p (Qnil
);
2425 /* Update coding systems of this buffer's process (if any). */
2427 Lisp_Object process
;
2429 process
= Fget_buffer_process (Fcurrent_buffer ());
2430 if (PROCESSP (process
))
2431 setup_process_coding_systems (process
);
2437 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2438 Skill_all_local_variables
, 0, 0, 0,
2439 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2440 Most local variable bindings are eliminated so that the default values
2441 become effective once more. Also, the syntax table is set from
2442 `standard-syntax-table', the local keymap is set to nil,
2443 and the abbrev table from `fundamental-mode-abbrev-table'.
2444 This function also forces redisplay of the mode line.
2446 Every function to select a new major mode starts by
2447 calling this function.
2449 As a special exception, local variables whose names have
2450 a non-nil `permanent-local' property are not eliminated by this function.
2452 The first thing this function does is run
2453 the normal hook `change-major-mode-hook'. */)
2456 Frun_hooks (1, &Qchange_major_mode_hook
);
2458 /* Make sure none of the bindings in local_var_alist
2459 remain swapped in, in their symbols. */
2461 swap_out_buffer_local_variables (current_buffer
);
2463 /* Actually eliminate all local bindings of this buffer. */
2465 reset_buffer_local_variables (current_buffer
, 0);
2467 /* Force mode-line redisplay. Useful here because all major mode
2468 commands call this function. */
2469 update_mode_lines
++;
2474 /* Make sure no local variables remain set up with buffer B
2475 for their current values. */
2478 swap_out_buffer_local_variables (struct buffer
*b
)
2480 Lisp_Object oalist
, alist
, buffer
;
2482 XSETBUFFER (buffer
, b
);
2483 oalist
= BVAR (b
, local_var_alist
);
2485 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2487 Lisp_Object sym
= XCAR (XCAR (alist
));
2488 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2489 /* Need not do anything if some other buffer's binding is
2491 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2493 /* Symbol is set up for this buffer's old local value:
2495 swap_in_global_binding (XSYMBOL (sym
));
2500 /* Find all the overlays in the current buffer that contain position POS.
2501 Return the number found, and store them in a vector in *VEC_PTR.
2502 Store in *LEN_PTR the size allocated for the vector.
2503 Store in *NEXT_PTR the next position after POS where an overlay starts,
2504 or ZV if there are no more overlays between POS and ZV.
2505 Store in *PREV_PTR the previous position before POS where an overlay ends,
2506 or where an overlay starts which ends at or after POS;
2507 or BEGV if there are no such overlays from BEGV to POS.
2508 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2510 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2511 when this function is called.
2513 If EXTEND is non-zero, we make the vector bigger if necessary.
2514 If EXTEND is zero, we never extend the vector,
2515 and we store only as many overlays as will fit.
2516 But we still return the total number of overlays.
2518 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2519 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2520 default (BEGV or ZV). */
2523 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2525 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2527 Lisp_Object overlay
, start
, end
;
2528 struct Lisp_Overlay
*tail
;
2530 ptrdiff_t len
= *len_ptr
;
2531 Lisp_Object
*vec
= *vec_ptr
;
2532 ptrdiff_t next
= ZV
;
2533 ptrdiff_t prev
= BEGV
;
2534 int inhibit_storing
= 0;
2536 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2538 ptrdiff_t startpos
, endpos
;
2540 XSETMISC (overlay
, tail
);
2542 start
= OVERLAY_START (overlay
);
2543 end
= OVERLAY_END (overlay
);
2544 endpos
= OVERLAY_POSITION (end
);
2551 startpos
= OVERLAY_POSITION (start
);
2552 /* This one ends at or after POS
2553 so its start counts for PREV_PTR if it's before POS. */
2554 if (prev
< startpos
&& startpos
< pos
)
2558 if (startpos
<= pos
)
2562 /* The supplied vector is full.
2563 Either make it bigger, or don't store any more in it. */
2566 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2572 inhibit_storing
= 1;
2575 if (!inhibit_storing
)
2577 /* Keep counting overlays even if we can't return them all. */
2580 else if (startpos
< next
)
2584 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2586 ptrdiff_t startpos
, endpos
;
2588 XSETMISC (overlay
, tail
);
2590 start
= OVERLAY_START (overlay
);
2591 end
= OVERLAY_END (overlay
);
2592 startpos
= OVERLAY_POSITION (start
);
2595 if (startpos
< next
)
2599 endpos
= OVERLAY_POSITION (end
);
2606 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2612 inhibit_storing
= 1;
2615 if (!inhibit_storing
)
2619 if (startpos
< pos
&& startpos
> prev
)
2622 else if (endpos
< pos
&& endpos
> prev
)
2624 else if (endpos
== pos
&& startpos
> prev
2625 && (!change_req
|| startpos
< pos
))
2636 /* Find all the overlays in the current buffer that overlap the range
2637 BEG-END, or are empty at BEG, or are empty at END provided END
2638 denotes the position at the end of the current buffer.
2640 Return the number found, and store them in a vector in *VEC_PTR.
2641 Store in *LEN_PTR the size allocated for the vector.
2642 Store in *NEXT_PTR the next position after POS where an overlay starts,
2643 or ZV if there are no more overlays.
2644 Store in *PREV_PTR the previous position before POS where an overlay ends,
2645 or BEGV if there are no previous overlays.
2646 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2648 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2649 when this function is called.
2651 If EXTEND is non-zero, we make the vector bigger if necessary.
2652 If EXTEND is zero, we never extend the vector,
2653 and we store only as many overlays as will fit.
2654 But we still return the total number of overlays. */
2657 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2658 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2659 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2661 Lisp_Object overlay
, ostart
, oend
;
2662 struct Lisp_Overlay
*tail
;
2664 ptrdiff_t len
= *len_ptr
;
2665 Lisp_Object
*vec
= *vec_ptr
;
2666 ptrdiff_t next
= ZV
;
2667 ptrdiff_t prev
= BEGV
;
2668 int inhibit_storing
= 0;
2669 int end_is_Z
= end
== Z
;
2671 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2673 ptrdiff_t startpos
, endpos
;
2675 XSETMISC (overlay
, tail
);
2677 ostart
= OVERLAY_START (overlay
);
2678 oend
= OVERLAY_END (overlay
);
2679 endpos
= OVERLAY_POSITION (oend
);
2686 startpos
= OVERLAY_POSITION (ostart
);
2687 /* Count an interval if it overlaps the range, is empty at the
2688 start of the range, or is empty at END provided END denotes the
2689 end of the buffer. */
2690 if ((beg
< endpos
&& startpos
< end
)
2691 || (startpos
== endpos
2692 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2696 /* The supplied vector is full.
2697 Either make it bigger, or don't store any more in it. */
2700 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2706 inhibit_storing
= 1;
2709 if (!inhibit_storing
)
2711 /* Keep counting overlays even if we can't return them all. */
2714 else if (startpos
< next
)
2718 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2720 ptrdiff_t startpos
, endpos
;
2722 XSETMISC (overlay
, tail
);
2724 ostart
= OVERLAY_START (overlay
);
2725 oend
= OVERLAY_END (overlay
);
2726 startpos
= OVERLAY_POSITION (ostart
);
2729 if (startpos
< next
)
2733 endpos
= OVERLAY_POSITION (oend
);
2734 /* Count an interval if it overlaps the range, is empty at the
2735 start of the range, or is empty at END provided END denotes the
2736 end of the buffer. */
2737 if ((beg
< endpos
&& startpos
< end
)
2738 || (startpos
== endpos
2739 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2745 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2751 inhibit_storing
= 1;
2754 if (!inhibit_storing
)
2758 else if (endpos
< beg
&& endpos
> prev
)
2770 /* Return non-zero if there exists an overlay with a non-nil
2771 `mouse-face' property overlapping OVERLAY. */
2774 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2776 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2777 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2778 ptrdiff_t n
, i
, size
;
2779 Lisp_Object
*v
, tem
;
2782 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2783 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2786 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2787 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2790 for (i
= 0; i
< n
; ++i
)
2791 if (!EQ (v
[i
], overlay
)
2792 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2801 /* Fast function to just test if we're at an overlay boundary. */
2803 overlay_touches_p (ptrdiff_t pos
)
2805 Lisp_Object overlay
;
2806 struct Lisp_Overlay
*tail
;
2808 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2812 XSETMISC (overlay
,tail
);
2813 if (!OVERLAYP (overlay
))
2816 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2819 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2823 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2827 XSETMISC (overlay
, tail
);
2828 if (!OVERLAYP (overlay
))
2831 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2834 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2842 Lisp_Object overlay
;
2848 compare_overlays (const void *v1
, const void *v2
)
2850 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2851 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2852 if (s1
->priority
!= s2
->priority
)
2853 return s1
->priority
< s2
->priority
? -1 : 1;
2854 if (s1
->beg
!= s2
->beg
)
2855 return s1
->beg
< s2
->beg
? -1 : 1;
2856 if (s1
->end
!= s2
->end
)
2857 return s2
->end
< s1
->end
? -1 : 1;
2858 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2859 between "equal" overlays. The result can still change between
2860 invocations of Emacs, but it won't change in the middle of
2861 `find_field' (bug#6830). */
2862 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2863 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2867 /* Sort an array of overlays by priority. The array is modified in place.
2868 The return value is the new size; this may be smaller than the original
2869 size if some of the overlays were invalid or were window-specific. */
2871 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2874 struct sortvec
*sortvec
;
2875 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2877 /* Put the valid and relevant overlays into sortvec. */
2879 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2882 Lisp_Object overlay
;
2884 overlay
= overlay_vec
[i
];
2885 if (OVERLAY_VALID (overlay
)
2886 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2887 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2889 /* If we're interested in a specific window, then ignore
2890 overlays that are limited to some other window. */
2895 window
= Foverlay_get (overlay
, Qwindow
);
2896 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2900 /* This overlay is good and counts: put it into sortvec. */
2901 sortvec
[j
].overlay
= overlay
;
2902 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2903 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2904 tem
= Foverlay_get (overlay
, Qpriority
);
2906 sortvec
[j
].priority
= XINT (tem
);
2908 sortvec
[j
].priority
= 0;
2914 /* Sort the overlays into the proper order: increasing priority. */
2917 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2919 for (i
= 0; i
< noverlays
; i
++)
2920 overlay_vec
[i
] = sortvec
[i
].overlay
;
2926 Lisp_Object string
, string2
;
2933 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2934 ptrdiff_t size
; /* Allocated length of that array. */
2935 ptrdiff_t used
; /* How much of the array is currently in use. */
2936 ptrdiff_t bytes
; /* Total length of the strings in buf. */
2939 /* Buffers for storing information about the overlays touching a given
2940 position. These could be automatic variables in overlay_strings, but
2941 it's more efficient to hold onto the memory instead of repeatedly
2942 allocating and freeing it. */
2943 static struct sortstrlist overlay_heads
, overlay_tails
;
2944 static unsigned char *overlay_str_buf
;
2946 /* Allocated length of overlay_str_buf. */
2947 static ptrdiff_t overlay_str_len
;
2949 /* A comparison function suitable for passing to qsort. */
2951 cmp_for_strings (const void *as1
, const void *as2
)
2953 struct sortstr
*s1
= (struct sortstr
*)as1
;
2954 struct sortstr
*s2
= (struct sortstr
*)as2
;
2955 if (s1
->size
!= s2
->size
)
2956 return s2
->size
< s1
->size
? -1 : 1;
2957 if (s1
->priority
!= s2
->priority
)
2958 return s1
->priority
< s2
->priority
? -1 : 1;
2963 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2964 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2968 if (ssl
->used
== ssl
->size
)
2969 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
2970 ssl
->buf
[ssl
->used
].string
= str
;
2971 ssl
->buf
[ssl
->used
].string2
= str2
;
2972 ssl
->buf
[ssl
->used
].size
= size
;
2973 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2976 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2977 nbytes
= SCHARS (str
);
2978 else if (! STRING_MULTIBYTE (str
))
2979 nbytes
= count_size_as_multibyte (SDATA (str
),
2982 nbytes
= SBYTES (str
);
2984 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2985 memory_full (SIZE_MAX
);
2986 ssl
->bytes
+= nbytes
;
2990 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2991 nbytes
= SCHARS (str2
);
2992 else if (! STRING_MULTIBYTE (str2
))
2993 nbytes
= count_size_as_multibyte (SDATA (str2
),
2996 nbytes
= SBYTES (str2
);
2998 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2999 memory_full (SIZE_MAX
);
3000 ssl
->bytes
+= nbytes
;
3004 /* Return the concatenation of the strings associated with overlays that
3005 begin or end at POS, ignoring overlays that are specific to a window
3006 other than W. The strings are concatenated in the appropriate order:
3007 shorter overlays nest inside longer ones, and higher priority inside
3008 lower. Normally all of the after-strings come first, but zero-sized
3009 overlays have their after-strings ride along with the before-strings
3010 because it would look strange to print them inside-out.
3012 Returns the string length, and stores the contents indirectly through
3013 PSTR, if that variable is non-null. The string may be overwritten by
3014 subsequent calls. */
3017 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3019 Lisp_Object overlay
, window
, str
;
3020 struct Lisp_Overlay
*ov
;
3021 ptrdiff_t startpos
, endpos
;
3022 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3024 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3025 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3026 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3028 XSETMISC (overlay
, ov
);
3029 eassert (OVERLAYP (overlay
));
3031 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3032 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3035 if (endpos
!= pos
&& startpos
!= pos
)
3037 window
= Foverlay_get (overlay
, Qwindow
);
3038 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3041 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3042 record_overlay_string (&overlay_heads
, str
,
3044 ? Foverlay_get (overlay
, Qafter_string
)
3046 Foverlay_get (overlay
, Qpriority
),
3048 else if (endpos
== pos
3049 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3050 record_overlay_string (&overlay_tails
, str
, Qnil
,
3051 Foverlay_get (overlay
, Qpriority
),
3054 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3056 XSETMISC (overlay
, ov
);
3057 eassert (OVERLAYP (overlay
));
3059 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3060 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3063 if (endpos
!= pos
&& startpos
!= pos
)
3065 window
= Foverlay_get (overlay
, Qwindow
);
3066 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3069 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3070 record_overlay_string (&overlay_heads
, str
,
3072 ? Foverlay_get (overlay
, Qafter_string
)
3074 Foverlay_get (overlay
, Qpriority
),
3076 else if (endpos
== pos
3077 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3078 record_overlay_string (&overlay_tails
, str
, Qnil
,
3079 Foverlay_get (overlay
, Qpriority
),
3082 if (overlay_tails
.used
> 1)
3083 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3085 if (overlay_heads
.used
> 1)
3086 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3088 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3095 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3096 memory_full (SIZE_MAX
);
3097 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3098 if (total
> overlay_str_len
)
3099 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3100 total
- overlay_str_len
, -1, 1);
3102 p
= overlay_str_buf
;
3103 for (i
= overlay_tails
.used
; --i
>= 0;)
3106 tem
= overlay_tails
.buf
[i
].string
;
3107 nbytes
= copy_text (SDATA (tem
), p
,
3109 STRING_MULTIBYTE (tem
), multibyte
);
3112 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3115 tem
= overlay_heads
.buf
[i
].string
;
3116 nbytes
= copy_text (SDATA (tem
), p
,
3118 STRING_MULTIBYTE (tem
), multibyte
);
3120 tem
= overlay_heads
.buf
[i
].string2
;
3123 nbytes
= copy_text (SDATA (tem
), p
,
3125 STRING_MULTIBYTE (tem
), multibyte
);
3129 if (p
!= overlay_str_buf
+ total
)
3132 *pstr
= overlay_str_buf
;
3138 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3141 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3143 Lisp_Object overlay
, beg
, end
;
3144 struct Lisp_Overlay
*prev
, *tail
, *next
;
3146 /* See if anything in overlays_before should move to overlays_after. */
3148 /* We don't strictly need prev in this loop; it should always be nil.
3149 But we use it for symmetry and in case that should cease to be true
3150 with some future change. */
3152 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3155 XSETMISC (overlay
, tail
);
3157 /* If the overlay is not valid, get rid of it. */
3158 if (!OVERLAY_VALID (overlay
))
3163 /* Splice the cons cell TAIL out of overlays_before. */
3167 buf
->overlays_before
= next
;
3173 beg
= OVERLAY_START (overlay
);
3174 end
= OVERLAY_END (overlay
);
3176 if (OVERLAY_POSITION (end
) > pos
)
3178 /* OVERLAY needs to be moved. */
3179 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3180 struct Lisp_Overlay
*other
, *other_prev
;
3182 /* Splice the cons cell TAIL out of overlays_before. */
3186 buf
->overlays_before
= next
;
3188 /* Search thru overlays_after for where to put it. */
3190 for (other
= buf
->overlays_after
; other
;
3191 other_prev
= other
, other
= other
->next
)
3193 Lisp_Object otherbeg
, otheroverlay
;
3195 XSETMISC (otheroverlay
, other
);
3196 eassert (OVERLAY_VALID (otheroverlay
));
3198 otherbeg
= OVERLAY_START (otheroverlay
);
3199 if (OVERLAY_POSITION (otherbeg
) >= where
)
3203 /* Add TAIL to overlays_after before OTHER. */
3206 other_prev
->next
= tail
;
3208 buf
->overlays_after
= tail
;
3212 /* We've reached the things that should stay in overlays_before.
3213 All the rest of overlays_before must end even earlier,
3218 /* See if anything in overlays_after should be in overlays_before. */
3220 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3223 XSETMISC (overlay
, tail
);
3225 /* If the overlay is not valid, get rid of it. */
3226 if (!OVERLAY_VALID (overlay
))
3231 /* Splice the cons cell TAIL out of overlays_after. */
3235 buf
->overlays_after
= next
;
3241 beg
= OVERLAY_START (overlay
);
3242 end
= OVERLAY_END (overlay
);
3244 /* Stop looking, when we know that nothing further
3245 can possibly end before POS. */
3246 if (OVERLAY_POSITION (beg
) > pos
)
3249 if (OVERLAY_POSITION (end
) <= pos
)
3251 /* OVERLAY needs to be moved. */
3252 ptrdiff_t where
= OVERLAY_POSITION (end
);
3253 struct Lisp_Overlay
*other
, *other_prev
;
3255 /* Splice the cons cell TAIL out of overlays_after. */
3259 buf
->overlays_after
= next
;
3261 /* Search thru overlays_before for where to put it. */
3263 for (other
= buf
->overlays_before
; other
;
3264 other_prev
= other
, other
= other
->next
)
3266 Lisp_Object otherend
, otheroverlay
;
3268 XSETMISC (otheroverlay
, other
);
3269 eassert (OVERLAY_VALID (otheroverlay
));
3271 otherend
= OVERLAY_END (otheroverlay
);
3272 if (OVERLAY_POSITION (otherend
) <= where
)
3276 /* Add TAIL to overlays_before before OTHER. */
3279 other_prev
->next
= tail
;
3281 buf
->overlays_before
= tail
;
3286 buf
->overlay_center
= pos
;
3290 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3292 /* After an insertion, the lists are still sorted properly,
3293 but we may need to update the value of the overlay center. */
3294 if (current_buffer
->overlay_center
>= pos
)
3295 current_buffer
->overlay_center
+= length
;
3299 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3301 if (current_buffer
->overlay_center
< pos
)
3302 /* The deletion was to our right. No change needed; the before- and
3303 after-lists are still consistent. */
3305 else if (current_buffer
->overlay_center
- pos
> length
)
3306 /* The deletion was to our left. We need to adjust the center value
3307 to account for the change in position, but the lists are consistent
3308 given the new value. */
3309 current_buffer
->overlay_center
-= length
;
3311 /* We're right in the middle. There might be things on the after-list
3312 that now belong on the before-list. Recentering will move them,
3313 and also update the center point. */
3314 recenter_overlay_lists (current_buffer
, pos
);
3317 /* Fix up overlays that were garbled as a result of permuting markers
3318 in the range START through END. Any overlay with at least one
3319 endpoint in this range will need to be unlinked from the overlay
3320 list and reinserted in its proper place.
3321 Such an overlay might even have negative size at this point.
3322 If so, we'll make the overlay empty. */
3324 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3326 Lisp_Object overlay
;
3327 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3328 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3329 /* These are either nil, indicating that before_list or after_list
3330 should be assigned, or the cons cell the cdr of which should be
3332 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3333 /* 'Parent', likewise, indicates a cons cell or
3334 current_buffer->overlays_before or overlays_after, depending
3335 which loop we're in. */
3336 struct Lisp_Overlay
*tail
, *parent
;
3337 ptrdiff_t startpos
, endpos
;
3339 /* This algorithm shifts links around instead of consing and GCing.
3340 The loop invariant is that before_list (resp. after_list) is a
3341 well-formed list except that its last element, the CDR of beforep
3342 (resp. afterp) if beforep (afterp) isn't nil or before_list
3343 (after_list) if it is, is still uninitialized. So it's not a bug
3344 that before_list isn't initialized, although it may look
3346 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3348 XSETMISC (overlay
, tail
);
3350 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3351 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3353 /* If the overlay is backwards, make it empty. */
3354 if (endpos
< startpos
)
3357 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3365 || (startpos
>= start
&& startpos
< end
))
3367 /* Add it to the end of the wrong list. Later on,
3368 recenter_overlay_lists will move it to the right place. */
3369 if (endpos
< current_buffer
->overlay_center
)
3374 afterp
->next
= tail
;
3382 beforep
->next
= tail
;
3386 current_buffer
->overlays_before
= tail
->next
;
3388 parent
->next
= tail
->next
;
3392 parent
= tail
, tail
= parent
->next
;
3394 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3396 XSETMISC (overlay
, tail
);
3398 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3399 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3401 /* If the overlay is backwards, make it empty. */
3402 if (endpos
< startpos
)
3405 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3409 if (startpos
>= end
)
3412 if (startpos
>= start
3413 || (endpos
>= start
&& endpos
< end
))
3415 if (endpos
< current_buffer
->overlay_center
)
3420 afterp
->next
= tail
;
3428 beforep
->next
= tail
;
3432 current_buffer
->overlays_after
= tail
->next
;
3434 parent
->next
= tail
->next
;
3438 parent
= tail
, tail
= parent
->next
;
3441 /* Splice the constructed (wrong) lists into the buffer's lists,
3442 and let the recenter function make it sane again. */
3445 beforep
->next
= current_buffer
->overlays_before
;
3446 current_buffer
->overlays_before
= before_list
;
3448 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3452 afterp
->next
= current_buffer
->overlays_after
;
3453 current_buffer
->overlays_after
= after_list
;
3455 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3458 /* We have two types of overlay: the one whose ending marker is
3459 after-insertion-marker (this is the usual case) and the one whose
3460 ending marker is before-insertion-marker. When `overlays_before'
3461 contains overlays of the latter type and the former type in this
3462 order and both overlays end at inserting position, inserting a text
3463 increases only the ending marker of the latter type, which results
3464 in incorrect ordering of `overlays_before'.
3466 This function fixes ordering of overlays in the slot
3467 `overlays_before' of the buffer *BP. Before the insertion, `point'
3468 was at PREV, and now is at POS. */
3471 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3473 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3474 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3476 ptrdiff_t end
IF_LINT (= 0);
3478 /* After the insertion, the several overlays may be in incorrect
3479 order. The possibility is that, in the list `overlays_before',
3480 an overlay which ends at POS appears after an overlay which ends
3481 at PREV. Since POS is greater than PREV, we must fix the
3482 ordering of these overlays, by moving overlays ends at POS before
3483 the overlays ends at PREV. */
3485 /* At first, find a place where disordered overlays should be linked
3486 in. It is where an overlay which end before POS exists. (i.e. an
3487 overlay whose ending marker is after-insertion-marker if disorder
3490 && (XSETMISC (tem
, tail
),
3491 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3497 /* If we don't find such an overlay,
3498 or the found one ends before PREV,
3499 or the found one is the last one in the list,
3500 we don't have to fix anything. */
3501 if (!tail
|| end
< prev
|| !tail
->next
)
3504 right_pair
= parent
;
3508 /* Now, end position of overlays in the list TAIL should be before
3509 or equal to PREV. In the loop, an overlay which ends at POS is
3510 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3511 we found an overlay which ends before PREV, the remaining
3512 overlays are in correct order. */
3515 XSETMISC (tem
, tail
);
3516 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3519 { /* This overlay is disordered. */
3520 struct Lisp_Overlay
*found
= tail
;
3522 /* Unlink the found overlay. */
3524 parent
->next
= tail
;
3525 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3526 and link it into the right place. */
3529 found
->next
= bp
->overlays_before
;
3530 bp
->overlays_before
= found
;
3534 found
->next
= right_pair
->next
;
3535 right_pair
->next
= found
;
3538 else if (end
== prev
)
3543 else /* No more disordered overlay. */
3548 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3549 doc
: /* Return t if OBJECT is an overlay. */)
3550 (Lisp_Object object
)
3552 return (OVERLAYP (object
) ? Qt
: Qnil
);
3555 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3556 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3557 If omitted, BUFFER defaults to the current buffer.
3558 BEG and END may be integers or markers.
3559 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3560 for the front of the overlay advance when text is inserted there
3561 \(which means the text *is not* included in the overlay).
3562 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3563 for the rear of the overlay advance when text is inserted there
3564 \(which means the text *is* included in the overlay). */)
3565 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3567 Lisp_Object overlay
;
3571 XSETBUFFER (buffer
, current_buffer
);
3573 CHECK_BUFFER (buffer
);
3575 && ! EQ (Fmarker_buffer (beg
), buffer
))
3576 error ("Marker points into wrong buffer");
3578 && ! EQ (Fmarker_buffer (end
), buffer
))
3579 error ("Marker points into wrong buffer");
3581 CHECK_NUMBER_COERCE_MARKER (beg
);
3582 CHECK_NUMBER_COERCE_MARKER (end
);
3584 if (XINT (beg
) > XINT (end
))
3587 temp
= beg
; beg
= end
; end
= temp
;
3590 b
= XBUFFER (buffer
);
3592 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3593 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3595 if (!NILP (front_advance
))
3596 XMARKER (beg
)->insertion_type
= 1;
3597 if (!NILP (rear_advance
))
3598 XMARKER (end
)->insertion_type
= 1;
3600 overlay
= allocate_misc ();
3601 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3602 XOVERLAY (overlay
)->start
= beg
;
3603 XOVERLAY (overlay
)->end
= end
;
3604 XOVERLAY (overlay
)->plist
= Qnil
;
3605 XOVERLAY (overlay
)->next
= NULL
;
3607 /* Put the new overlay on the wrong list. */
3608 end
= OVERLAY_END (overlay
);
3609 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3611 if (b
->overlays_after
)
3612 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3613 b
->overlays_after
= XOVERLAY (overlay
);
3617 if (b
->overlays_before
)
3618 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3619 b
->overlays_before
= XOVERLAY (overlay
);
3622 /* This puts it in the right list, and in the right order. */
3623 recenter_overlay_lists (b
, b
->overlay_center
);
3625 /* We don't need to redisplay the region covered by the overlay, because
3626 the overlay has no properties at the moment. */
3631 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3634 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3638 ptrdiff_t temp
= start
;
3643 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3645 /* If this is a buffer not in the selected window,
3646 we must do other windows. */
3647 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3648 windows_or_buffers_changed
= 1;
3649 /* If multiple windows show this buffer, we must do other windows. */
3650 else if (buffer_shared
> 1)
3651 windows_or_buffers_changed
= 1;
3652 /* If we modify an overlay at the end of the buffer, we cannot
3653 be sure that window end is still valid. */
3654 else if (end
>= ZV
&& start
<= ZV
)
3655 windows_or_buffers_changed
= 1;
3657 ++BUF_OVERLAY_MODIFF (buf
);
3661 static struct Lisp_Overlay
*
3662 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3664 struct Lisp_Overlay
*tmp
, *prev
;
3665 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3669 prev
->next
= tmp
->next
;
3672 overlay
->next
= NULL
;
3678 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3679 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3680 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3681 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3683 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3685 struct buffer
*b
, *ob
= 0;
3686 Lisp_Object obuffer
;
3687 ptrdiff_t count
= SPECPDL_INDEX ();
3688 ptrdiff_t n_beg
, n_end
, o_beg
IF_LINT (= 0), o_end
IF_LINT (= 0);
3690 CHECK_OVERLAY (overlay
);
3692 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3694 XSETBUFFER (buffer
, current_buffer
);
3695 CHECK_BUFFER (buffer
);
3697 if (NILP (Fbuffer_live_p (buffer
)))
3698 error ("Attempt to move overlay to a dead buffer");
3701 && ! EQ (Fmarker_buffer (beg
), buffer
))
3702 error ("Marker points into wrong buffer");
3704 && ! EQ (Fmarker_buffer (end
), buffer
))
3705 error ("Marker points into wrong buffer");
3707 CHECK_NUMBER_COERCE_MARKER (beg
);
3708 CHECK_NUMBER_COERCE_MARKER (end
);
3710 if (XINT (beg
) > XINT (end
))
3713 temp
= beg
; beg
= end
; end
= temp
;
3716 specbind (Qinhibit_quit
, Qt
);
3718 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3719 b
= XBUFFER (buffer
);
3721 if (!NILP (obuffer
))
3723 ob
= XBUFFER (obuffer
);
3725 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3726 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3728 ob
->overlays_before
=
3729 unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3730 ob
->overlays_after
=
3731 unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3732 eassert (XOVERLAY (overlay
)->next
== NULL
);
3735 /* Set the overlay boundaries, which may clip them. */
3736 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3737 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3739 n_beg
= marker_position (OVERLAY_START (overlay
));
3740 n_end
= marker_position (OVERLAY_END (overlay
));
3742 /* If the overlay has changed buffers, do a thorough redisplay. */
3743 if (!EQ (buffer
, obuffer
))
3745 /* Redisplay where the overlay was. */
3747 modify_overlay (ob
, o_beg
, o_end
);
3749 /* Redisplay where the overlay is going to be. */
3750 modify_overlay (b
, n_beg
, n_end
);
3753 /* Redisplay the area the overlay has just left, or just enclosed. */
3756 modify_overlay (b
, o_end
, n_end
);
3757 else if (o_end
== n_end
)
3758 modify_overlay (b
, o_beg
, n_beg
);
3760 modify_overlay (b
, min (o_beg
, n_beg
), max (o_end
, n_end
));
3763 /* Delete the overlay if it is empty after clipping and has the
3764 evaporate property. */
3765 if (n_beg
== n_end
&& !NILP (Foverlay_get (overlay
, Qevaporate
)))
3766 return unbind_to (count
, Fdelete_overlay (overlay
));
3768 /* Put the overlay into the new buffer's overlay lists, first on the
3770 if (n_end
< b
->overlay_center
)
3772 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3773 b
->overlays_after
= XOVERLAY (overlay
);
3777 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3778 b
->overlays_before
= XOVERLAY (overlay
);
3781 /* This puts it in the right list, and in the right order. */
3782 recenter_overlay_lists (b
, b
->overlay_center
);
3784 return unbind_to (count
, overlay
);
3787 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3788 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3789 (Lisp_Object overlay
)
3793 ptrdiff_t count
= SPECPDL_INDEX ();
3795 CHECK_OVERLAY (overlay
);
3797 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3801 b
= XBUFFER (buffer
);
3802 specbind (Qinhibit_quit
, Qt
);
3805 = unchain_overlay (b
->overlays_before
, XOVERLAY (overlay
));
3807 = unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3808 eassert (XOVERLAY (overlay
)->next
== NULL
);
3811 marker_position (OVERLAY_START (overlay
)),
3812 marker_position (OVERLAY_END (overlay
)));
3813 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3814 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3816 /* When deleting an overlay with before or after strings, turn off
3817 display optimizations for the affected buffer, on the basis that
3818 these strings may contain newlines. This is easier to do than to
3819 check for that situation during redisplay. */
3820 if (!windows_or_buffers_changed
3821 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3822 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3823 b
->prevent_redisplay_optimizations_p
= 1;
3825 return unbind_to (count
, Qnil
);
3828 /* Overlay dissection functions. */
3830 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3831 doc
: /* Return the position at which OVERLAY starts. */)
3832 (Lisp_Object overlay
)
3834 CHECK_OVERLAY (overlay
);
3836 return (Fmarker_position (OVERLAY_START (overlay
)));
3839 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3840 doc
: /* Return the position at which OVERLAY ends. */)
3841 (Lisp_Object overlay
)
3843 CHECK_OVERLAY (overlay
);
3845 return (Fmarker_position (OVERLAY_END (overlay
)));
3848 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3849 doc
: /* Return the buffer OVERLAY belongs to.
3850 Return nil if OVERLAY has been deleted. */)
3851 (Lisp_Object overlay
)
3853 CHECK_OVERLAY (overlay
);
3855 return Fmarker_buffer (OVERLAY_START (overlay
));
3858 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3859 doc
: /* Return a list of the properties on OVERLAY.
3860 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3862 (Lisp_Object overlay
)
3864 CHECK_OVERLAY (overlay
);
3866 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3870 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3871 doc
: /* Return a list of the overlays that contain the character at POS. */)
3874 ptrdiff_t len
, noverlays
;
3875 Lisp_Object
*overlay_vec
;
3878 CHECK_NUMBER_COERCE_MARKER (pos
);
3881 /* We can't use alloca here because overlays_at can call xrealloc. */
3882 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3884 /* Put all the overlays we want in a vector in overlay_vec.
3885 Store the length in len. */
3886 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3889 /* Make a list of them all. */
3890 result
= Flist (noverlays
, overlay_vec
);
3892 xfree (overlay_vec
);
3896 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3897 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3898 Overlap means that at least one character is contained within the overlay
3899 and also contained within the specified region.
3900 Empty overlays are included in the result if they are located at BEG,
3901 between BEG and END, or at END provided END denotes the position at the
3902 end of the buffer. */)
3903 (Lisp_Object beg
, Lisp_Object end
)
3905 ptrdiff_t len
, noverlays
;
3906 Lisp_Object
*overlay_vec
;
3909 CHECK_NUMBER_COERCE_MARKER (beg
);
3910 CHECK_NUMBER_COERCE_MARKER (end
);
3913 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3915 /* Put all the overlays we want in a vector in overlay_vec.
3916 Store the length in len. */
3917 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3920 /* Make a list of them all. */
3921 result
= Flist (noverlays
, overlay_vec
);
3923 xfree (overlay_vec
);
3927 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3929 doc
: /* Return the next position after POS where an overlay starts or ends.
3930 If there are no overlay boundaries from POS to (point-max),
3931 the value is (point-max). */)
3934 ptrdiff_t i
, len
, noverlays
;
3936 Lisp_Object
*overlay_vec
;
3938 CHECK_NUMBER_COERCE_MARKER (pos
);
3941 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3943 /* Put all the overlays we want in a vector in overlay_vec.
3944 Store the length in len.
3945 endpos gets the position where the next overlay starts. */
3946 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3949 /* If any of these overlays ends before endpos,
3950 use its ending point instead. */
3951 for (i
= 0; i
< noverlays
; i
++)
3956 oend
= OVERLAY_END (overlay_vec
[i
]);
3957 oendpos
= OVERLAY_POSITION (oend
);
3958 if (oendpos
< endpos
)
3962 xfree (overlay_vec
);
3963 return make_number (endpos
);
3966 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3967 Sprevious_overlay_change
, 1, 1, 0,
3968 doc
: /* Return the previous position before POS where an overlay starts or ends.
3969 If there are no overlay boundaries from (point-min) to POS,
3970 the value is (point-min). */)
3974 Lisp_Object
*overlay_vec
;
3977 CHECK_NUMBER_COERCE_MARKER (pos
);
3979 /* At beginning of buffer, we know the answer;
3980 avoid bug subtracting 1 below. */
3981 if (XINT (pos
) == BEGV
)
3985 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3987 /* Put all the overlays we want in a vector in overlay_vec.
3988 Store the length in len.
3989 prevpos gets the position of the previous change. */
3990 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3993 xfree (overlay_vec
);
3994 return make_number (prevpos
);
3997 /* These functions are for debugging overlays. */
3999 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4000 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4001 The car has all the overlays before the overlay center;
4002 the cdr has all the overlays after the overlay center.
4003 Recentering overlays moves overlays between these lists.
4004 The lists you get are copies, so that changing them has no effect.
4005 However, the overlays you get are the real objects that the buffer uses. */)
4008 struct Lisp_Overlay
*ol
;
4009 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4010 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4013 before
= Fcons (tmp
, before
);
4015 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4018 after
= Fcons (tmp
, after
);
4020 return Fcons (Fnreverse (before
), Fnreverse (after
));
4023 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4024 doc
: /* Recenter the overlays of the current buffer around position POS.
4025 That makes overlay lookup faster for positions near POS (but perhaps slower
4026 for positions far away from POS). */)
4030 CHECK_NUMBER_COERCE_MARKER (pos
);
4032 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4033 recenter_overlay_lists (current_buffer
, p
);
4037 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4038 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4039 (Lisp_Object overlay
, Lisp_Object prop
)
4041 CHECK_OVERLAY (overlay
);
4042 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4045 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4046 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4047 VALUE will be returned.*/)
4048 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4050 Lisp_Object tail
, buffer
;
4053 CHECK_OVERLAY (overlay
);
4055 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4057 for (tail
= XOVERLAY (overlay
)->plist
;
4058 CONSP (tail
) && CONSP (XCDR (tail
));
4059 tail
= XCDR (XCDR (tail
)))
4060 if (EQ (XCAR (tail
), prop
))
4062 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4063 XSETCAR (XCDR (tail
), value
);
4066 /* It wasn't in the list, so add it to the front. */
4067 changed
= !NILP (value
);
4068 XOVERLAY (overlay
)->plist
4069 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4071 if (! NILP (buffer
))
4074 modify_overlay (XBUFFER (buffer
),
4075 marker_position (OVERLAY_START (overlay
)),
4076 marker_position (OVERLAY_END (overlay
)));
4077 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4078 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4079 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4080 Fdelete_overlay (overlay
);
4086 /* Subroutine of report_overlay_modification. */
4088 /* Lisp vector holding overlay hook functions to call.
4089 Vector elements come in pairs.
4090 Each even-index element is a list of hook functions.
4091 The following odd-index element is the overlay they came from.
4093 Before the buffer change, we fill in this vector
4094 as we call overlay hook functions.
4095 After the buffer change, we get the functions to call from this vector.
4096 This way we always call the same functions before and after the change. */
4097 static Lisp_Object last_overlay_modification_hooks
;
4099 /* Number of elements actually used in last_overlay_modification_hooks. */
4100 static ptrdiff_t last_overlay_modification_hooks_used
;
4102 /* Add one functionlist/overlay pair
4103 to the end of last_overlay_modification_hooks. */
4106 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4108 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4110 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4111 last_overlay_modification_hooks
=
4112 larger_vector (last_overlay_modification_hooks
, 2, -1);
4113 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4114 functionlist
); last_overlay_modification_hooks_used
++;
4115 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4116 overlay
); last_overlay_modification_hooks_used
++;
4119 /* Run the modification-hooks of overlays that include
4120 any part of the text in START to END.
4121 If this change is an insertion, also
4122 run the insert-before-hooks of overlay starting at END,
4123 and the insert-after-hooks of overlay ending at START.
4125 This is called both before and after the modification.
4126 AFTER is nonzero when we call after the modification.
4128 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4129 When AFTER is nonzero, they are the start position,
4130 the position after the inserted new text,
4131 and the length of deleted or replaced old text. */
4134 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4135 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4137 Lisp_Object prop
, overlay
;
4138 struct Lisp_Overlay
*tail
;
4139 /* 1 if this change is an insertion. */
4140 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4141 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4146 /* We used to run the functions as soon as we found them and only register
4147 them in last_overlay_modification_hooks for the purpose of the `after'
4148 case. But running elisp code as we traverse the list of overlays is
4149 painful because the list can be modified by the elisp code so we had to
4150 copy at several places. We now simply do a read-only traversal that
4151 only collects the functions to run and we run them afterwards. It's
4152 simpler, especially since all the code was already there. -stef */
4156 /* We are being called before a change.
4157 Scan the overlays to find the functions to call. */
4158 last_overlay_modification_hooks_used
= 0;
4159 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4161 ptrdiff_t startpos
, endpos
;
4162 Lisp_Object ostart
, oend
;
4164 XSETMISC (overlay
, tail
);
4166 ostart
= OVERLAY_START (overlay
);
4167 oend
= OVERLAY_END (overlay
);
4168 endpos
= OVERLAY_POSITION (oend
);
4169 if (XFASTINT (start
) > endpos
)
4171 startpos
= OVERLAY_POSITION (ostart
);
4172 if (insertion
&& (XFASTINT (start
) == startpos
4173 || XFASTINT (end
) == startpos
))
4175 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4177 add_overlay_mod_hooklist (prop
, overlay
);
4179 if (insertion
&& (XFASTINT (start
) == endpos
4180 || XFASTINT (end
) == endpos
))
4182 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4184 add_overlay_mod_hooklist (prop
, overlay
);
4186 /* Test for intersecting intervals. This does the right thing
4187 for both insertion and deletion. */
4188 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4190 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4192 add_overlay_mod_hooklist (prop
, overlay
);
4196 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4198 ptrdiff_t startpos
, endpos
;
4199 Lisp_Object ostart
, oend
;
4201 XSETMISC (overlay
, tail
);
4203 ostart
= OVERLAY_START (overlay
);
4204 oend
= OVERLAY_END (overlay
);
4205 startpos
= OVERLAY_POSITION (ostart
);
4206 endpos
= OVERLAY_POSITION (oend
);
4207 if (XFASTINT (end
) < startpos
)
4209 if (insertion
&& (XFASTINT (start
) == startpos
4210 || XFASTINT (end
) == startpos
))
4212 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4214 add_overlay_mod_hooklist (prop
, overlay
);
4216 if (insertion
&& (XFASTINT (start
) == endpos
4217 || XFASTINT (end
) == endpos
))
4219 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4221 add_overlay_mod_hooklist (prop
, overlay
);
4223 /* Test for intersecting intervals. This does the right thing
4224 for both insertion and deletion. */
4225 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4227 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4229 add_overlay_mod_hooklist (prop
, overlay
);
4234 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4236 /* Call the functions recorded in last_overlay_modification_hooks.
4237 First copy the vector contents, in case some of these hooks
4238 do subsequent modification of the buffer. */
4239 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4240 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4243 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4244 size
* sizeof (Lisp_Object
));
4246 gcpro1
.nvars
= size
;
4248 for (i
= 0; i
< size
;)
4250 Lisp_Object prop_i
, overlay_i
;
4252 overlay_i
= copy
[i
++];
4253 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4260 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4261 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4263 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4265 GCPRO4 (list
, arg1
, arg2
, arg3
);
4267 while (CONSP (list
))
4270 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4272 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4278 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4281 evaporate_overlays (ptrdiff_t pos
)
4283 Lisp_Object overlay
, hit_list
;
4284 struct Lisp_Overlay
*tail
;
4287 if (pos
<= current_buffer
->overlay_center
)
4288 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4291 XSETMISC (overlay
, tail
);
4292 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4295 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4296 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4297 hit_list
= Fcons (overlay
, hit_list
);
4300 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4303 XSETMISC (overlay
, tail
);
4304 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4307 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4308 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4309 hit_list
= Fcons (overlay
, hit_list
);
4311 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4312 Fdelete_overlay (XCAR (hit_list
));
4315 /* Somebody has tried to store a value with an unacceptable type
4316 in the slot with offset OFFSET. */
4319 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4321 Lisp_Object predicate
;
4325 case_Lisp_Int
: predicate
= Qintegerp
; break;
4326 case Lisp_String
: predicate
= Qstringp
; break;
4327 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4331 wrong_type_argument (predicate
, newval
);
4335 /***********************************************************************
4336 Allocation with mmap
4337 ***********************************************************************/
4339 #ifdef USE_MMAP_FOR_BUFFERS
4341 #include <sys/types.h>
4342 #include <sys/mman.h>
4345 #ifdef MAP_ANONYMOUS
4346 #define MAP_ANON MAP_ANONYMOUS
4353 #define MAP_FAILED ((void *) -1)
4365 /* Memory is allocated in regions which are mapped using mmap(2).
4366 The current implementation lets the system select mapped
4367 addresses; we're not using MAP_FIXED in general, except when
4368 trying to enlarge regions.
4370 Each mapped region starts with a mmap_region structure, the user
4371 area starts after that structure, aligned to MEM_ALIGN.
4373 +-----------------------+
4374 | struct mmap_info + |
4376 +-----------------------+
4380 +-----------------------+ */
4384 /* User-specified size. */
4385 size_t nbytes_specified
;
4387 /* Number of bytes mapped */
4388 size_t nbytes_mapped
;
4390 /* Pointer to the location holding the address of the memory
4391 allocated with the mmap'd block. The variable actually points
4392 after this structure. */
4395 /* Next and previous in list of all mmap'd regions. */
4396 struct mmap_region
*next
, *prev
;
4399 /* Doubly-linked list of mmap'd regions. */
4401 static struct mmap_region
*mmap_regions
;
4403 /* File descriptor for mmap. If we don't have anonymous mapping,
4404 /dev/zero will be opened on it. */
4408 /* Temporary storage for mmap_set_vars, see there. */
4410 static struct mmap_region
*mmap_regions_1
;
4411 static int mmap_fd_1
;
4413 /* Page size on this system. */
4415 static int mmap_page_size
;
4417 /* 1 means mmap has been initialized. */
4419 static int mmap_initialized_p
;
4421 /* Value is X rounded up to the next multiple of N. */
4423 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4425 /* Size of mmap_region structure plus padding. */
4427 #define MMAP_REGION_STRUCT_SIZE \
4428 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4430 /* Given a pointer P to the start of the user-visible part of a mapped
4431 region, return a pointer to the start of the region. */
4433 #define MMAP_REGION(P) \
4434 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4436 /* Given a pointer P to the start of a mapped region, return a pointer
4437 to the start of the user-visible part of the region. */
4439 #define MMAP_USER_AREA(P) \
4440 ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4442 #define MEM_ALIGN sizeof (double)
4444 /* Predicate returning true if part of the address range [START .. END]
4445 is currently mapped. Used to prevent overwriting an existing
4448 Default is to conservatively assume the address range is occupied by
4449 something else. This can be overridden by system configuration
4450 files if system-specific means to determine this exists. */
4452 #ifndef MMAP_ALLOCATED_P
4453 #define MMAP_ALLOCATED_P(start, end) 1
4456 /* Perform necessary initializations for the use of mmap. */
4462 /* The value of mmap_fd is initially 0 in temacs, and -1
4463 in a dumped Emacs. */
4466 /* No anonymous mmap -- we need the file descriptor. */
4467 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4469 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4471 #endif /* MAP_ANON == 0 */
4473 if (mmap_initialized_p
)
4475 mmap_initialized_p
= 1;
4481 mmap_page_size
= getpagesize ();
4484 /* Return a region overlapping address range START...END, or null if
4485 none. END is not including, i.e. the last byte in the range
4488 static struct mmap_region
*
4489 mmap_find (void *start
, void *end
)
4491 struct mmap_region
*r
;
4492 char *s
= (char *) start
, *e
= (char *) end
;
4494 for (r
= mmap_regions
; r
; r
= r
->next
)
4496 char *rstart
= (char *) r
;
4497 char *rend
= rstart
+ r
->nbytes_mapped
;
4499 if (/* First byte of range, i.e. START, in this region? */
4500 (s
>= rstart
&& s
< rend
)
4501 /* Last byte of range, i.e. END - 1, in this region? */
4502 || (e
> rstart
&& e
<= rend
)
4503 /* First byte of this region in the range? */
4504 || (rstart
>= s
&& rstart
< e
)
4505 /* Last byte of this region in the range? */
4506 || (rend
> s
&& rend
<= e
))
4514 /* Unmap a region. P is a pointer to the start of the user-araa of
4515 the region. Value is non-zero if successful. */
4518 mmap_free_1 (struct mmap_region
*r
)
4521 r
->next
->prev
= r
->prev
;
4523 r
->prev
->next
= r
->next
;
4525 mmap_regions
= r
->next
;
4527 if (munmap (r
, r
->nbytes_mapped
) == -1)
4529 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4537 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4538 Value is non-zero if successful. */
4541 mmap_enlarge (struct mmap_region
*r
, int npages
)
4543 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4549 /* Unmap pages at the end of the region. */
4550 nbytes
= - npages
* mmap_page_size
;
4551 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4552 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4555 r
->nbytes_mapped
-= nbytes
;
4559 else if (npages
> 0)
4561 nbytes
= npages
* mmap_page_size
;
4563 /* Try to map additional pages at the end of the region. We
4564 cannot do this if the address range is already occupied by
4565 something else because mmap deletes any previous mapping.
4566 I'm not sure this is worth doing, let's see. */
4567 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4571 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4572 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4573 if (p
== MAP_FAILED
)
4574 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4575 else if (p
!= region_end
)
4577 /* Kernels are free to choose a different address. In
4578 that case, unmap what we've mapped above; we have
4580 if (munmap (p
, nbytes
) == -1)
4581 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4585 r
->nbytes_mapped
+= nbytes
;
4595 /* Set or reset variables holding references to mapped regions. If
4596 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4597 non-zero, set all variables to the start of the user-areas
4600 This function is called from Fdump_emacs to ensure that the dumped
4601 Emacs doesn't contain references to memory that won't be mapped
4602 when Emacs starts. */
4605 mmap_set_vars (int restore_p
)
4607 struct mmap_region
*r
;
4611 mmap_regions
= mmap_regions_1
;
4612 mmap_fd
= mmap_fd_1
;
4613 for (r
= mmap_regions
; r
; r
= r
->next
)
4614 *r
->var
= MMAP_USER_AREA (r
);
4618 for (r
= mmap_regions
; r
; r
= r
->next
)
4620 mmap_regions_1
= mmap_regions
;
4621 mmap_regions
= NULL
;
4622 mmap_fd_1
= mmap_fd
;
4628 /* Allocate a block of storage large enough to hold NBYTES bytes of
4629 data. A pointer to the data is returned in *VAR. VAR is thus the
4630 address of some variable which will use the data area.
4632 The allocation of 0 bytes is valid.
4634 If we can't allocate the necessary memory, set *VAR to null, and
4638 mmap_alloc (void **var
, size_t nbytes
)
4645 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4646 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4649 if (p
== MAP_FAILED
)
4651 if (errno
!= ENOMEM
)
4652 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4657 struct mmap_region
*r
= (struct mmap_region
*) p
;
4659 r
->nbytes_specified
= nbytes
;
4660 r
->nbytes_mapped
= map
;
4663 r
->next
= mmap_regions
;
4668 p
= MMAP_USER_AREA (p
);
4675 /* Free a block of relocatable storage whose data is pointed to by
4676 PTR. Store 0 in *PTR to show there's no block allocated. */
4679 mmap_free (void **var
)
4685 mmap_free_1 (MMAP_REGION (*var
));
4691 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4692 resize it to size NBYTES. Change *VAR to reflect the new block,
4693 and return this value. If more memory cannot be allocated, then
4694 leave *VAR unchanged, and return null. */
4697 mmap_realloc (void **var
, size_t nbytes
)
4704 result
= mmap_alloc (var
, nbytes
);
4705 else if (nbytes
== 0)
4708 result
= mmap_alloc (var
, nbytes
);
4712 struct mmap_region
*r
= MMAP_REGION (*var
);
4713 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4718 void *old_ptr
= *var
;
4720 /* Try to map additional pages at the end of the region.
4721 If that fails, allocate a new region, copy data
4722 from the old region, then free it. */
4723 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4726 r
->nbytes_specified
= nbytes
;
4727 *var
= result
= old_ptr
;
4729 else if (mmap_alloc (var
, nbytes
))
4731 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4732 mmap_free_1 (MMAP_REGION (old_ptr
));
4734 r
= MMAP_REGION (result
);
4735 r
->nbytes_specified
= nbytes
;
4743 else if (room
- nbytes
>= mmap_page_size
)
4745 /* Shrinking by at least a page. Let's give some
4746 memory back to the system.
4748 The extra parens are to make the division happens first,
4749 on positive values, so we know it will round towards
4751 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4753 r
->nbytes_specified
= nbytes
;
4757 /* Leave it alone. */
4759 r
->nbytes_specified
= nbytes
;
4767 #endif /* USE_MMAP_FOR_BUFFERS */
4771 /***********************************************************************
4772 Buffer-text Allocation
4773 ***********************************************************************/
4775 /* Allocate NBYTES bytes for buffer B's text buffer. */
4778 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4783 #if defined USE_MMAP_FOR_BUFFERS
4784 p
= mmap_alloc ((void **) &b
->text
->beg
, nbytes
);
4785 #elif defined REL_ALLOC
4786 p
= r_alloc ((void **) &b
->text
->beg
, nbytes
);
4788 p
= xmalloc (nbytes
);
4794 memory_full (nbytes
);
4797 b
->text
->beg
= (unsigned char *) p
;
4801 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4805 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4808 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4811 #if defined USE_MMAP_FOR_BUFFERS
4812 p
= mmap_realloc ((void **) &b
->text
->beg
, nbytes
);
4813 #elif defined REL_ALLOC
4814 p
= r_re_alloc ((void **) &b
->text
->beg
, nbytes
);
4816 p
= xrealloc (b
->text
->beg
, nbytes
);
4822 memory_full (nbytes
);
4825 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4830 /* Free buffer B's text buffer. */
4833 free_buffer_text (struct buffer
*b
)
4837 #if defined USE_MMAP_FOR_BUFFERS
4838 mmap_free ((void **) &b
->text
->beg
);
4839 #elif defined REL_ALLOC
4840 r_alloc_free ((void **) &b
->text
->beg
);
4842 xfree (b
->text
->beg
);
4845 BUF_BEG_ADDR (b
) = NULL
;
4851 /***********************************************************************
4853 ***********************************************************************/
4856 init_buffer_once (void)
4860 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4862 /* Make sure all markable slots in buffer_defaults
4863 are initialized reasonably, so mark_buffer won't choke. */
4864 reset_buffer (&buffer_defaults
);
4865 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4866 reset_buffer_local_variables (&buffer_defaults
, 1);
4867 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4868 reset_buffer (&buffer_local_symbols
);
4869 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4870 /* Prevent GC from getting confused. */
4871 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4872 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4873 BUF_INTERVALS (&buffer_defaults
) = 0;
4874 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4875 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, 0);
4876 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4877 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, 0);
4878 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4880 /* Set up the default values of various buffer slots. */
4881 /* Must do these before making the first buffer! */
4883 /* real setup is done in bindings.el */
4884 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4885 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4886 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4887 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4888 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4889 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4890 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4891 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4892 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4893 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4894 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4895 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4896 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4897 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4898 buffer_defaults
.overlays_before
= NULL
;
4899 buffer_defaults
.overlays_after
= NULL
;
4900 buffer_defaults
.overlay_center
= BEG
;
4902 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4903 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4904 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4905 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4906 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4907 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4908 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4909 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4910 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4912 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4913 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4914 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4915 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4916 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4917 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4918 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4919 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4920 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4921 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4922 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4923 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4924 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4925 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4926 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4927 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4928 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4929 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4930 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4931 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4932 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4934 /* Assign the local-flags to the slots that have default values.
4935 The local flag is a bit that is used in the buffer
4936 to say that it has its own local value for the slot.
4937 The local flag bits are in the local_var_flags slot of the buffer. */
4939 /* Nothing can work if this isn't true */
4940 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4942 /* 0 means not a lisp var, -1 means always local, else mask */
4943 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4944 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4945 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4946 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4947 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4948 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4949 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4950 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4951 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4952 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4953 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4954 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4955 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4956 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4957 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4958 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4959 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4960 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4961 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4964 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4965 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4966 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4967 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4968 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4969 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4970 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4971 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4972 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4973 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4974 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4975 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4976 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4977 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
4978 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
4979 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
4980 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
4981 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
4982 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
4983 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
4984 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
4985 /* Make this one a permanent local. */
4986 buffer_permanent_local_flags
[idx
++] = 1;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
4988 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
4990 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
4992 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
4994 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
4995 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5000 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5001 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5002 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5003 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5005 /* Need more room? */
5006 if (idx
>= MAX_PER_BUFFER_VARS
)
5008 last_per_buffer_idx
= idx
;
5010 Vbuffer_alist
= Qnil
;
5014 QSFundamental
= make_pure_c_string ("Fundamental");
5016 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5017 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5019 Qmode_class
= intern_c_string ("mode-class");
5021 Qprotected_field
= intern_c_string ("protected-field");
5023 Qpermanent_local
= intern_c_string ("permanent-local");
5025 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5026 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5028 /* super-magic invisible buffer */
5029 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5030 Vbuffer_alist
= Qnil
;
5032 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5034 inhibit_modification_hooks
= 0;
5044 #ifdef USE_MMAP_FOR_BUFFERS
5046 /* When using the ralloc implementation based on mmap(2), buffer
5047 text pointers will have been set to null in the dumped Emacs.
5051 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5052 if (b
->text
->beg
== NULL
)
5053 enlarge_buffer_text (b
, 0);
5055 #endif /* USE_MMAP_FOR_BUFFERS */
5057 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5058 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5059 Fset_buffer_multibyte (Qnil
);
5061 pwd
= get_current_dir_name ();
5064 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5066 /* Maybe this should really use some standard subroutine
5067 whose definition is filename syntax dependent. */
5069 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5071 /* Grow buffer to add directory separator and '\0'. */
5072 pwd
= (char *) realloc (pwd
, len
+ 2);
5074 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5075 pwd
[len
] = DIRECTORY_SEP
;
5076 pwd
[len
+ 1] = '\0';
5079 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5080 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5081 /* At this moment, we still don't know how to decode the
5082 directory name. So, we keep the bytes in multibyte form so
5083 that ENCODE_FILE correctly gets the original bytes. */
5084 BVAR (current_buffer
, directory
)
5085 = string_to_multibyte (BVAR (current_buffer
, directory
));
5087 /* Add /: to the front of the name
5088 if it would otherwise be treated as magic. */
5089 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5091 /* If the default dir is just /, TEMP is non-nil
5092 because of the ange-ftp completion handler.
5093 However, it is not necessary to turn / into /:/.
5094 So avoid doing that. */
5095 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5096 BVAR (current_buffer
, directory
)
5097 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5099 temp
= get_minibuffer (0);
5100 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5105 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5106 Object stored in the current buffer. address is the address of the slot
5107 in the buffer that is current now. */
5109 /* TYPE is nil for a general Lisp variable.
5110 An integer specifies a type; then only Lisp values
5111 with that type code are allowed (except that nil is allowed too).
5112 LNAME is the Lisp-level variable name.
5113 VNAME is the name of the buffer slot.
5114 DOC is a dummy where you write the doc string as a comment. */
5115 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5117 static struct Lisp_Buffer_Objfwd bo_fwd; \
5118 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5122 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5123 Lisp_Object
*address
, Lisp_Object type
)
5125 struct Lisp_Symbol
*sym
;
5128 sym
= XSYMBOL (intern (namestring
));
5129 offset
= (char *)address
- (char *)current_buffer
;
5131 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5132 bo_fwd
->offset
= offset
;
5133 bo_fwd
->slottype
= type
;
5134 sym
->declared_special
= 1;
5135 sym
->redirect
= SYMBOL_FORWARDED
;
5137 /* I tried to do the job without a cast, but it seems impossible.
5138 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5139 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5141 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5143 if (PER_BUFFER_IDX (offset
) == 0)
5144 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5145 slot of buffer_local_flags */
5150 /* initialize the buffer routines */
5152 syms_of_buffer (void)
5154 staticpro (&last_overlay_modification_hooks
);
5155 last_overlay_modification_hooks
5156 = Fmake_vector (make_number (10), Qnil
);
5158 staticpro (&Vbuffer_defaults
);
5159 staticpro (&Vbuffer_local_symbols
);
5160 staticpro (&Qfundamental_mode
);
5161 staticpro (&Qmode_class
);
5162 staticpro (&QSFundamental
);
5163 staticpro (&Vbuffer_alist
);
5164 staticpro (&Qprotected_field
);
5165 staticpro (&Qpermanent_local
);
5166 staticpro (&Qkill_buffer_hook
);
5168 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5169 DEFSYM (Qoverlayp
, "overlayp");
5170 DEFSYM (Qevaporate
, "evaporate");
5171 DEFSYM (Qmodification_hooks
, "modification-hooks");
5172 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5173 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5174 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5175 DEFSYM (Qpriority
, "priority");
5176 DEFSYM (Qbefore_string
, "before-string");
5177 DEFSYM (Qafter_string
, "after-string");
5178 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5179 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5180 DEFSYM (Qafter_change_functions
, "after-change-functions");
5181 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5183 Fput (Qprotected_field
, Qerror_conditions
,
5184 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5185 Fput (Qprotected_field
, Qerror_message
,
5186 make_pure_c_string ("Attempt to modify a protected field"));
5188 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5190 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5191 This is the same as (default-value 'mode-line-format). */);
5193 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5195 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5196 This is the same as (default-value 'header-line-format). */);
5198 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5199 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5200 This is the same as (default-value 'cursor-type). */);
5202 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5204 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5205 This is the same as (default-value 'line-spacing). */);
5207 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5208 cursor_in_non_selected_windows
,
5209 doc
: /* Default value of `cursor-in-non-selected-windows'.
5210 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5212 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5214 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5215 This is the same as (default-value 'abbrev-mode). */);
5217 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5219 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5220 This is the same as (default-value 'ctl-arrow). */);
5222 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5223 enable_multibyte_characters
,
5224 doc
: /* Default value of `enable-multibyte-characters' for buffers not overriding it.
5225 This is the same as (default-value 'enable-multibyte-characters). */);
5227 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5228 buffer_file_coding_system
,
5229 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5230 This is the same as (default-value 'buffer-file-coding-system). */);
5232 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5234 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5235 This is the same as (default-value 'truncate-lines). */);
5237 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5239 doc
: /* Default value of `fill-column' for buffers that do not override it.
5240 This is the same as (default-value 'fill-column). */);
5242 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5244 doc
: /* Default value of `left-margin' for buffers that do not override it.
5245 This is the same as (default-value 'left-margin). */);
5247 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5249 doc
: /* Default value of `tab-width' for buffers that do not override it.
5250 This is the same as (default-value 'tab-width). */);
5252 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5254 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5255 This is the same as (default-value 'case-fold-search). */);
5257 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5259 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5260 This is the same as (default-value 'left-margin-width). */);
5262 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5264 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5265 This is the same as (default-value 'right-margin-width). */);
5267 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5269 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5270 This is the same as (default-value 'left-fringe-width). */);
5272 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5274 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5275 This is the same as (default-value 'right-fringe-width). */);
5277 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5278 fringes_outside_margins
,
5279 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5280 This is the same as (default-value 'fringes-outside-margins). */);
5282 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5284 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5285 This is the same as (default-value 'scroll-bar-width). */);
5287 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5288 vertical_scroll_bar_type
,
5289 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5290 This is the same as (default-value 'vertical-scroll-bar). */);
5292 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5293 indicate_empty_lines
,
5294 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5295 This is the same as (default-value 'indicate-empty-lines). */);
5297 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5298 indicate_buffer_boundaries
,
5299 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5300 This is the same as (default-value 'indicate-buffer-boundaries). */);
5302 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5303 fringe_indicator_alist
,
5304 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5305 This is the same as (default-value 'fringe-indicator-alist'). */);
5307 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5308 fringe_cursor_alist
,
5309 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5310 This is the same as (default-value 'fringe-cursor-alist'). */);
5312 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5313 scroll_up_aggressively
,
5314 doc
: /* Default value of `scroll-up-aggressively'.
5315 This value applies in buffers that don't have their own local values.
5316 This is the same as (default-value 'scroll-up-aggressively). */);
5318 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5319 scroll_down_aggressively
,
5320 doc
: /* Default value of `scroll-down-aggressively'.
5321 This value applies in buffers that don't have their own local values.
5322 This is the same as (default-value 'scroll-down-aggressively). */);
5324 DEFVAR_PER_BUFFER ("header-line-format",
5325 &BVAR (current_buffer
, header_line_format
),
5327 doc
: /* Analogous to `mode-line-format', but controls the header line.
5328 The header line appears, optionally, at the top of a window;
5329 the mode line appears at the bottom. */);
5331 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5333 doc
: /* Template for displaying mode line for current buffer.
5335 The value may be nil, a string, a symbol or a list.
5337 A value of nil means don't display a mode line.
5339 For any symbol other than t or nil, the symbol's value is processed as
5340 a mode line construct. As a special exception, if that value is a
5341 string, the string is processed verbatim, without handling any
5342 %-constructs (see below). Also, unless the symbol has a non-nil
5343 `risky-local-variable' property, all properties in any strings, as
5344 well as all :eval and :propertize forms in the value, are ignored.
5346 A list whose car is a string or list is processed by processing each
5347 of the list elements recursively, as separate mode line constructs,
5348 and concatenating the results.
5350 A list of the form `(:eval FORM)' is processed by evaluating FORM and
5351 using the result as a mode line construct. Be careful--FORM should
5352 not load any files, because that can cause an infinite recursion.
5354 A list of the form `(:propertize ELT PROPS...)' is processed by
5355 processing ELT as the mode line construct, and adding the text
5356 properties PROPS to the result.
5358 A list whose car is a symbol is processed by examining the symbol's
5359 value, and, if that value is non-nil, processing the cadr of the list
5360 recursively; and if that value is nil, processing the caddr of the
5363 A list whose car is an integer is processed by processing the cadr of
5364 the list, and padding (if the number is positive) or truncating (if
5365 negative) to the width specified by that number.
5367 A string is printed verbatim in the mode line except for %-constructs:
5368 %b -- print buffer name. %f -- print visited file name.
5369 %F -- print frame name.
5370 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5371 %& is like %*, but ignore read-only-ness.
5372 % means buffer is read-only and * means it is modified.
5373 For a modified read-only buffer, %* gives % and %+ gives *.
5374 %s -- print process status. %l -- print the current line number.
5375 %c -- print the current column number (this makes editing slower).
5376 To make the column number update correctly in all cases,
5377 `column-number-mode' must be non-nil.
5378 %i -- print the size of the buffer.
5379 %I -- like %i, but use k, M, G, etc., to abbreviate.
5380 %p -- print percent of buffer above top of window, or Top, Bot or All.
5381 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5382 or print Bottom or All.
5383 %n -- print Narrow if appropriate.
5384 %t -- visited file is text or binary (if OS supports this distinction).
5385 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5386 %Z -- like %z, but including the end-of-line format.
5387 %e -- print error message about full memory.
5388 %@ -- print @ or hyphen. @ means that default-directory is on a
5390 %[ -- print one [ for each recursive editing level. %] similar.
5391 %% -- print %. %- -- print infinitely many dashes.
5392 Decimal digits after the % specify field width to which to pad. */);
5394 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5395 doc
: /* Value of `major-mode' for new buffers. */);
5397 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5398 make_number (Lisp_Symbol
),
5399 doc
: /* Symbol for current buffer's major mode.
5400 The default value (normally `fundamental-mode') affects new buffers.
5401 A value of nil means to use the current buffer's major mode, provided
5402 it is not marked as "special".
5404 When a mode is used by default, `find-file' switches to it before it
5405 reads the contents into the buffer and before it finishes setting up
5406 the buffer. Thus, the mode and its hooks should not expect certain
5407 variables such as `buffer-read-only' and `buffer-file-coding-system'
5410 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5412 doc
: /* Pretty name of current buffer's major mode.
5413 Usually a string, but can use any of the constructs for `mode-line-format',
5415 Format with `format-mode-line' to produce a string value. */);
5417 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5418 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5420 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5421 doc
: /* Non-nil if Abbrev mode is enabled.
5422 Use the command `abbrev-mode' to change this variable. */);
5424 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5426 doc
: /* Non-nil if searches and matches should ignore case. */);
5428 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5429 make_number (LISP_INT_TAG
),
5430 doc
: /* Column beyond which automatic line-wrapping should happen.
5431 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5433 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5434 make_number (LISP_INT_TAG
),
5435 doc
: /* Column for the default `indent-line-function' to indent to.
5436 Linefeed indents to this column in Fundamental mode. */);
5438 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5439 make_number (LISP_INT_TAG
),
5440 doc
: /* Distance between tab stops (for display of tab characters), in columns.
5441 This should be an integer greater than zero. */);
5443 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5444 doc
: /* Non-nil means display control chars with uparrow.
5445 A value of nil means use backslash and octal digits.
5446 This variable does not apply to characters whose display is specified
5447 in the current display table (if there is one). */);
5449 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5450 &BVAR (current_buffer
, enable_multibyte_characters
),
5452 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5453 Otherwise they are regarded as unibyte. This affects the display,
5454 file I/O and the behavior of various editing commands.
5456 This variable is buffer-local but you cannot set it directly;
5457 use the function `set-buffer-multibyte' to change a buffer's representation.
5458 See also Info node `(elisp)Text Representations'. */);
5459 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5461 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5462 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5463 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5464 This variable applies to saving the buffer, and also to `write-region'
5465 and other functions that use `write-region'.
5466 It does not apply to sending output to subprocesses, however.
5468 If this is nil, the buffer is saved without any code conversion
5469 unless some coding system is specified in `file-coding-system-alist'
5470 for the buffer file.
5472 If the text to be saved cannot be encoded as specified by this variable,
5473 an alternative encoding is selected by `select-safe-coding-system', which see.
5475 The variable `coding-system-for-write', if non-nil, overrides this variable.
5477 This variable is never applied to a way of decoding a file while reading it. */);
5479 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5480 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5481 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5483 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5484 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5485 doc
: /* If non-nil, forces directionality of text paragraphs in the buffer.
5487 If this is nil (the default), the direction of each paragraph is
5488 determined by the first strong directional character of its text.
5489 The values of `right-to-left' and `left-to-right' override that.
5490 Any other value is treated as nil.
5492 This variable has no effect unless the buffer's value of
5493 \`bidi-display-reordering' is non-nil. */);
5495 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5496 doc
: /* Non-nil means do not display continuation lines.
5497 Instead, give each line of text just one screen line.
5499 Note that this is overridden by the variable
5500 `truncate-partial-width-windows' if that variable is non-nil
5501 and this buffer is not full-frame width.
5503 Minibuffers set this variable to nil. */);
5505 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5506 doc
: /* Non-nil means to use word-wrapping for continuation lines.
5507 When word-wrapping is on, continuation lines are wrapped at the space
5508 or tab character nearest to the right window edge.
5509 If nil, continuation lines are wrapped at the right screen edge.
5511 This variable has no effect if long lines are truncated (see
5512 `truncate-lines' and `truncate-partial-width-windows'). If you use
5513 word-wrapping, you might want to reduce the value of
5514 `truncate-partial-width-windows', since wrapping can make text readable
5515 in narrower windows.
5517 Instead of setting this variable directly, most users should use
5518 Visual Line mode . Visual Line mode, when enabled, sets `word-wrap'
5519 to t, and additionally redefines simple editing commands to act on
5520 visual lines rather than logical lines. See the documentation of
5521 `visual-line-mode'. */);
5523 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5524 make_number (Lisp_String
),
5525 doc
: /* Name of default directory of current buffer. Should end with slash.
5526 To interactively change the default directory, use command `cd'. */);
5528 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5530 doc
: /* Function called (if non-nil) to perform auto-fill.
5531 It is called after self-inserting any character specified in
5532 the `auto-fill-chars' table.
5533 NOTE: This variable is not a hook;
5534 its value may not be a list of functions. */);
5536 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5537 make_number (Lisp_String
),
5538 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5540 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5541 make_number (Lisp_String
),
5542 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5543 The truename of a file is calculated by `file-truename'
5544 and then abbreviated with `abbreviate-file-name'. */);
5546 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5547 &BVAR (current_buffer
, auto_save_file_name
),
5548 make_number (Lisp_String
),
5549 doc
: /* Name of file for auto-saving current buffer.
5550 If it is nil, that means don't auto-save this buffer. */);
5552 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5553 doc
: /* Non-nil if this buffer is read-only. */);
5555 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5556 doc
: /* Non-nil if this buffer's file has been backed up.
5557 Backing up is done before the first time the file is saved. */);
5559 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5560 make_number (LISP_INT_TAG
),
5561 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5563 -1 means auto-saving turned off until next real save.
5565 If you set this to -2, that means don't turn off auto-saving in this buffer
5566 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5567 you probably should set this to -2 in that buffer. */);
5569 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5571 doc
: /* Non-nil enables selective display.
5572 An integer N as value means display only lines
5573 that start with less than N columns of space.
5574 A value of t means that the character ^M makes itself and
5575 all the rest of the line invisible; also, when saving the buffer
5576 in a file, save the ^M as a newline. */);
5578 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5579 &BVAR (current_buffer
, selective_display_ellipses
),
5581 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5583 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5584 doc
: /* Non-nil if self-insertion should replace existing text.
5585 The value should be one of `overwrite-mode-textual',
5586 `overwrite-mode-binary', or nil.
5587 If it is `overwrite-mode-textual', self-insertion still
5588 inserts at the end of a line, and inserts when point is before a tab,
5589 until the tab is filled in.
5590 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5592 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5594 doc
: /* Display table that controls display of the contents of current buffer.
5596 If this variable is nil, the value of `standard-display-table' is used.
5597 Each window can have its own, overriding display table, see
5598 `set-window-display-table' and `window-display-table'.
5600 The display table is a char-table created with `make-display-table'.
5601 A char-table is an array indexed by character codes. Normal array
5602 primitives `aref' and `aset' can be used to access elements of a char-table.
5604 Each of the char-table elements control how to display the corresponding
5605 text character: the element at index C in the table says how to display
5606 the character whose code is C. Each element should be a vector of
5607 characters or nil. The value nil means display the character in the
5608 default fashion; otherwise, the characters from the vector are delivered
5609 to the screen instead of the original character.
5611 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5612 to display a capital Y instead of each X character.
5614 In addition, a char-table has six extra slots to control the display of:
5616 the end of a truncated screen line (extra-slot 0, a single character);
5617 the end of a continued line (extra-slot 1, a single character);
5618 the escape character used to display character codes in octal
5619 (extra-slot 2, a single character);
5620 the character used as an arrow for control characters (extra-slot 3,
5621 a single character);
5622 the decoration indicating the presence of invisible lines (extra-slot 4,
5623 a vector of characters);
5624 the character used to draw the border between side-by-side windows
5625 (extra-slot 5, a single character).
5627 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5629 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5631 doc
: /* Width of left marginal area for display of a buffer.
5632 A value of nil means no marginal area. */);
5634 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5636 doc
: /* Width of right marginal area for display of a buffer.
5637 A value of nil means no marginal area. */);
5639 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5641 doc
: /* Width of this buffer's left fringe (in pixels).
5642 A value of 0 means no left fringe is shown in this buffer's window.
5643 A value of nil means to use the left fringe width from the window's frame. */);
5645 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5647 doc
: /* Width of this buffer's right fringe (in pixels).
5648 A value of 0 means no right fringe is shown in this buffer's window.
5649 A value of nil means to use the right fringe width from the window's frame. */);
5651 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5653 doc
: /* Non-nil means to display fringes outside display margins.
5654 A value of nil means to display fringes between margins and buffer text. */);
5656 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5658 doc
: /* Width of this buffer's scroll bars in pixels.
5659 A value of nil means to use the scroll bar width from the window's frame. */);
5661 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5663 doc
: /* Position of this buffer's vertical scroll bar.
5664 The value takes effect whenever you tell a window to display this buffer;
5665 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5667 A value of `left' or `right' means put the vertical scroll bar at that side
5668 of the window; a value of nil means don't show any vertical scroll bars.
5669 A value of t (the default) means do whatever the window's frame specifies. */);
5671 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5672 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5673 doc
: /* Visually indicate empty lines after the buffer end.
5674 If non-nil, a bitmap is displayed in the left fringe of a window on
5675 window-systems. */);
5677 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5678 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5679 doc
: /* Visually indicate buffer boundaries and scrolling.
5680 If non-nil, the first and last line of the buffer are marked in the fringe
5681 of a window on window-systems with angle bitmaps, or if the window can be
5682 scrolled, the top and bottom line of the window are marked with up and down
5685 If value is a symbol `left' or `right', both angle and arrow bitmaps
5686 are displayed in the left or right fringe, resp. Any other value
5687 that doesn't look like an alist means display the angle bitmaps in
5688 the left fringe but no arrows.
5690 You can exercise more precise control by using an alist as the
5691 value. Each alist element (INDICATOR . POSITION) specifies
5692 where to show one of the indicators. INDICATOR is one of `top',
5693 `bottom', `up', `down', or t, which specifies the default position,
5694 and POSITION is one of `left', `right', or nil, meaning do not show
5697 For example, ((top . left) (t . right)) places the top angle bitmap in
5698 left fringe, the bottom angle bitmap in right fringe, and both arrow
5699 bitmaps in right fringe. To show just the angle bitmaps in the left
5700 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5702 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5703 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5704 doc
: /* Mapping from logical to physical fringe indicator bitmaps.
5705 The value is an alist where each element (INDICATOR . BITMAPS)
5706 specifies the fringe bitmaps used to display a specific logical
5709 INDICATOR specifies the logical indicator type which is one of the
5710 following symbols: `truncation' , `continuation', `overlay-arrow',
5711 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5713 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5714 the actual bitmap shown in the left or right fringe for the logical
5715 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5716 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5717 are used only for the `bottom' and `top-bottom' indicators when the
5718 last (only) line has no final newline. BITMAPS may also be a single
5719 symbol which is used in both left and right fringes. */);
5721 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5722 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5723 doc
: /* Mapping from logical to physical fringe cursor bitmaps.
5724 The value is an alist where each element (CURSOR . BITMAP)
5725 specifies the fringe bitmaps used to display a specific logical
5726 cursor type in the fringe.
5728 CURSOR specifies the logical cursor type which is one of the following
5729 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5730 one is used to show a hollow cursor on narrow lines display lines
5731 where the normal hollow cursor will not fit.
5733 BITMAP is the corresponding fringe bitmap shown for the logical
5736 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5737 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5738 doc
: /* How far to scroll windows upward.
5739 If you move point off the bottom, the window scrolls automatically.
5740 This variable controls how far it scrolls. The value nil, the default,
5741 means scroll to center point. A fraction means scroll to put point
5742 that fraction of the window's height from the bottom of the window.
5743 When the value is 0.0, point goes at the bottom line, which in the
5744 simple case that you moved off with C-f means scrolling just one line.
5745 1.0 means point goes at the top, so that in that simple case, the
5746 window scrolls by a full window height. Meaningful values are
5747 between 0.0 and 1.0, inclusive. */);
5749 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5750 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5751 doc
: /* How far to scroll windows downward.
5752 If you move point off the top, the window scrolls automatically.
5753 This variable controls how far it scrolls. The value nil, the default,
5754 means scroll to center point. A fraction means scroll to put point
5755 that fraction of the window's height from the top of the window.
5756 When the value is 0.0, point goes at the top line, which in the
5757 simple case that you moved off with C-b means scrolling just one line.
5758 1.0 means point goes at the bottom, so that in that simple case, the
5759 window scrolls by a full window height. Meaningful values are
5760 between 0.0 and 1.0, inclusive. */);
5762 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5766 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5767 doc
: /* List of functions to call before each text change.
5768 Two arguments are passed to each function: the positions of
5769 the beginning and end of the range of old text to be changed.
5770 \(For an insertion, the beginning and end are at the same place.)
5771 No information is given about the length of the text after the change.
5773 Buffer changes made while executing the `before-change-functions'
5774 don't call any before-change or after-change functions.
5775 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5777 If an unhandled error happens in running these functions,
5778 the variable's value remains nil. That prevents the error
5779 from happening repeatedly and making Emacs nonfunctional. */);
5780 Vbefore_change_functions
= Qnil
;
5782 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5783 doc
: /* List of functions to call after each text change.
5784 Three arguments are passed to each function: the positions of
5785 the beginning and end of the range of changed text,
5786 and the length in bytes of the pre-change text replaced by that range.
5787 \(For an insertion, the pre-change length is zero;
5788 for a deletion, that length is the number of bytes deleted,
5789 and the post-change beginning and end are at the same place.)
5791 Buffer changes made while executing the `after-change-functions'
5792 don't call any before-change or after-change functions.
5793 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5795 If an unhandled error happens in running these functions,
5796 the variable's value remains nil. That prevents the error
5797 from happening repeatedly and making Emacs nonfunctional. */);
5798 Vafter_change_functions
= Qnil
;
5800 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5801 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5802 The functions are run using the `run-hooks' function. */);
5803 Vfirst_change_hook
= Qnil
;
5805 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5806 doc
: /* List of undo entries in current buffer.
5807 Recent changes come first; older changes follow newer.
5809 An entry (BEG . END) represents an insertion which begins at
5810 position BEG and ends at position END.
5812 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5813 from (abs POSITION). If POSITION is positive, point was at the front
5814 of the text being deleted; if negative, point was at the end.
5816 An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously
5817 unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time)
5818 and is the visited file's modification time, as of that time. If the
5819 modification time of the most recent save is different, this entry is
5822 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5823 was modified between BEG and END. PROPERTY is the property name,
5824 and VALUE is the old value.
5826 An entry (apply FUN-NAME . ARGS) means undo the change with
5827 \(apply FUN-NAME ARGS).
5829 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5830 in the active region. BEG and END is the range affected by this entry
5831 and DELTA is the number of bytes added or deleted in that range by
5834 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5835 was adjusted in position by the offset DISTANCE (an integer).
5837 An entry of the form POSITION indicates that point was at the buffer
5838 location given by the integer. Undoing an entry of this form places
5841 Entries with value `nil' mark undo boundaries. The undo command treats
5842 the changes between two undo boundaries as a single step to be undone.
5844 If the value of the variable is t, undo information is not recorded. */);
5846 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5847 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5849 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5850 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5852 Normally, the line-motion functions work by scanning the buffer for
5853 newlines. Columnar operations (like `move-to-column' and
5854 `compute-motion') also work by scanning the buffer, summing character
5855 widths as they go. This works well for ordinary text, but if the
5856 buffer's lines are very long (say, more than 500 characters), these
5857 motion functions will take longer to execute. Emacs may also take
5858 longer to update the display.
5860 If `cache-long-line-scans' is non-nil, these motion functions cache the
5861 results of their scans, and consult the cache to avoid rescanning
5862 regions of the buffer until the text is modified. The caches are most
5863 beneficial when they prevent the most searching---that is, when the
5864 buffer contains long lines and large regions of characters with the
5865 same, fixed screen width.
5867 When `cache-long-line-scans' is non-nil, processing short lines will
5868 become slightly slower (because of the overhead of consulting the
5869 cache), and the caches will use memory roughly proportional to the
5870 number of newlines and characters whose screen width varies.
5872 The caches require no explicit maintenance; their accuracy is
5873 maintained internally by the Emacs primitives. Enabling or disabling
5874 the cache should not affect the behavior of any of the motion
5875 functions; it should only affect their performance. */);
5877 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5878 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5880 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5881 doc
: /* List of formats to use when saving this buffer.
5882 Formats are defined by `format-alist'. This variable is
5883 set when a file is visited. */);
5885 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5886 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5887 doc
: /* Format in which to write auto-save files.
5888 Should be a list of symbols naming formats that are defined in `format-alist'.
5889 If it is t, which is the default, auto-save files are written in the
5890 same format as a regular save would use. */);
5892 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5893 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5894 doc
: /* Invisibility spec of this buffer.
5895 The default is t, which means that text is invisible
5896 if it has a non-nil `invisible' property.
5897 If the value is a list, a text character is invisible if its `invisible'
5898 property is an element in that list (or is a list with members in common).
5899 If an element is a cons cell of the form (PROP . ELLIPSIS),
5900 then characters with property value PROP are invisible,
5901 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5903 DEFVAR_PER_BUFFER ("buffer-display-count",
5904 &BVAR (current_buffer
, display_count
), Qnil
,
5905 doc
: /* A number incremented each time this buffer is displayed in a window.
5906 The function `set-window-buffer' increments it. */);
5908 DEFVAR_PER_BUFFER ("buffer-display-time",
5909 &BVAR (current_buffer
, display_time
), Qnil
,
5910 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5911 The function `set-window-buffer' updates this variable
5912 to the value obtained by calling `current-time'.
5913 If the buffer has never been shown in a window, the value is nil. */);
5915 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5916 doc
: /* Non-nil if Transient Mark mode is enabled.
5917 See the command `transient-mark-mode' for a description of this minor mode.
5919 Non-nil also enables highlighting of the region whenever the mark is active.
5920 The variable `highlight-nonselected-windows' controls whether to highlight
5921 all windows or just the selected window.
5923 Lisp programs may give this variable certain special values:
5925 - A value of `lambda' enables Transient Mark mode temporarily.
5926 It is disabled again after any subsequent action that would
5927 normally deactivate the mark (e.g. buffer modification).
5929 - A value of (only . OLDVAL) enables Transient Mark mode
5930 temporarily. After any subsequent point motion command that is
5931 not shift-translated, or any other action that would normally
5932 deactivate the mark (e.g. buffer modification), the value of
5933 `transient-mark-mode' is set to OLDVAL. */);
5934 Vtransient_mark_mode
= Qnil
;
5936 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5937 doc
: /* Non-nil means disregard read-only status of buffers or characters.
5938 If the value is t, disregard `buffer-read-only' and all `read-only'
5939 text properties. If the value is a list, disregard `buffer-read-only'
5940 and disregard a `read-only' text property if the property value
5941 is a member of the list. */);
5942 Vinhibit_read_only
= Qnil
;
5944 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5945 doc
: /* Cursor to use when this buffer is in the selected window.
5946 Values are interpreted as follows:
5948 t use the cursor specified for the frame
5949 nil don't display a cursor
5950 box display a filled box cursor
5951 hollow display a hollow box cursor
5952 bar display a vertical bar cursor with default width
5953 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5954 hbar display a horizontal bar cursor with default height
5955 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5956 ANYTHING ELSE display a hollow box cursor
5958 When the buffer is displayed in a non-selected window, the
5959 cursor's appearance is instead controlled by the variable
5960 `cursor-in-non-selected-windows'. */);
5962 DEFVAR_PER_BUFFER ("line-spacing",
5963 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5964 doc
: /* Additional space to put between lines when displaying a buffer.
5965 The space is measured in pixels, and put below lines on graphic displays,
5966 see `display-graphic-p'.
5967 If value is a floating point number, it specifies the spacing relative
5968 to the default frame line height. A value of nil means add no extra space. */);
5970 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5971 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5972 doc
: /* Non-nil means show a cursor in non-selected windows.
5973 If nil, only shows a cursor in the selected window.
5974 If t, displays a cursor related to the usual cursor type
5975 \(a solid box becomes hollow, a bar becomes a narrower bar).
5976 You can also specify the cursor type as in the `cursor-type' variable.
5977 Use Custom to set this variable and update the display." */);
5979 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5980 doc
: /* List of functions called with no args to query before killing a buffer.
5981 The buffer being killed will be current while the functions are running.
5983 If any of them returns nil, the buffer is not killed. Functions run by
5984 this hook are supposed to not change the current buffer. */);
5985 Vkill_buffer_query_functions
= Qnil
;
5987 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
5988 doc
: /* Normal hook run before changing the major mode of a buffer.
5989 The function `kill-all-local-variables' runs this before doing anything else. */);
5990 Vchange_major_mode_hook
= Qnil
;
5991 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
5993 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
5994 doc
: /* Hook run when the buffer list changes.
5995 Functions running this hook are `get-buffer-create',
5996 `make-indirect-buffer', `rename-buffer', `kill-buffer',
5997 and `bury-buffer-internal'. */);
5998 Vbuffer_list_update_hook
= Qnil
;
5999 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
6001 defsubr (&Sbuffer_live_p
);
6002 defsubr (&Sbuffer_list
);
6003 defsubr (&Sget_buffer
);
6004 defsubr (&Sget_file_buffer
);
6005 defsubr (&Sget_buffer_create
);
6006 defsubr (&Smake_indirect_buffer
);
6007 defsubr (&Sgenerate_new_buffer_name
);
6008 defsubr (&Sbuffer_name
);
6009 /*defsubr (&Sbuffer_number);*/
6010 defsubr (&Sbuffer_file_name
);
6011 defsubr (&Sbuffer_base_buffer
);
6012 defsubr (&Sbuffer_local_value
);
6013 defsubr (&Sbuffer_local_variables
);
6014 defsubr (&Sbuffer_modified_p
);
6015 defsubr (&Sset_buffer_modified_p
);
6016 defsubr (&Sbuffer_modified_tick
);
6017 defsubr (&Sbuffer_chars_modified_tick
);
6018 defsubr (&Srename_buffer
);
6019 defsubr (&Sother_buffer
);
6020 defsubr (&Sbuffer_enable_undo
);
6021 defsubr (&Skill_buffer
);
6022 defsubr (&Sbury_buffer_internal
);
6023 defsubr (&Sset_buffer_major_mode
);
6024 defsubr (&Scurrent_buffer
);
6025 defsubr (&Sset_buffer
);
6026 defsubr (&Sbarf_if_buffer_read_only
);
6027 defsubr (&Serase_buffer
);
6028 defsubr (&Sbuffer_swap_text
);
6029 defsubr (&Sset_buffer_multibyte
);
6030 defsubr (&Skill_all_local_variables
);
6032 defsubr (&Soverlayp
);
6033 defsubr (&Smake_overlay
);
6034 defsubr (&Sdelete_overlay
);
6035 defsubr (&Smove_overlay
);
6036 defsubr (&Soverlay_start
);
6037 defsubr (&Soverlay_end
);
6038 defsubr (&Soverlay_buffer
);
6039 defsubr (&Soverlay_properties
);
6040 defsubr (&Soverlays_at
);
6041 defsubr (&Soverlays_in
);
6042 defsubr (&Snext_overlay_change
);
6043 defsubr (&Sprevious_overlay_change
);
6044 defsubr (&Soverlay_recenter
);
6045 defsubr (&Soverlay_lists
);
6046 defsubr (&Soverlay_get
);
6047 defsubr (&Soverlay_put
);
6048 defsubr (&Srestore_buffer_modified_p
);
6052 keys_of_buffer (void)
6054 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6055 initial_define_key (control_x_map
, 'k', "kill-buffer");
6057 /* This must not be in syms_of_buffer, because Qdisabled is not
6058 initialized when that function gets called. */
6059 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);