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 #define BUFFER_INLINE EXTERN_INLINE
24 #include <sys/types.h>
26 #include <sys/param.h>
35 #include "intervals.h"
38 #include "character.h"
40 #include "region-cache.h"
42 #include "blockinput.h"
47 struct buffer
*current_buffer
; /* the current buffer */
49 /* First buffer in chain of all buffers (in reverse order of creation).
50 Threaded through ->header.next.buffer. */
52 struct buffer
*all_buffers
;
54 /* This structure holds the default values of the buffer-local variables
55 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
56 The default value occupies the same slot in this structure
57 as an individual buffer's value occupies in that buffer.
58 Setting the default value also goes through the alist of buffers
59 and stores into each buffer that does not say it has a local value. */
61 struct buffer
alignas (GCALIGNMENT
) buffer_defaults
;
63 /* A Lisp_Object pointer to the above, used for staticpro */
65 static Lisp_Object Vbuffer_defaults
;
67 /* This structure marks which slots in a buffer have corresponding
68 default values in buffer_defaults.
69 Each such slot has a nonzero value in this structure.
70 The value has only one nonzero bit.
72 When a buffer has its own local value for a slot,
73 the entry for that slot (found in the same slot in this structure)
74 is turned on in the buffer's local_flags array.
76 If a slot in this structure is -1, then even though there may
77 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
78 and the corresponding slot in buffer_defaults is not used.
80 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
81 zero, that is a bug */
83 struct buffer buffer_local_flags
;
85 /* This structure holds the names of symbols whose values may be
86 buffer-local. It is indexed and accessed in the same way as the above. */
88 struct buffer
alignas (GCALIGNMENT
) buffer_local_symbols
;
90 /* A Lisp_Object pointer to the above, used for staticpro */
91 static Lisp_Object Vbuffer_local_symbols
;
93 /* Return the symbol of the per-buffer variable at offset OFFSET in
94 the buffer structure. */
96 #define PER_BUFFER_SYMBOL(OFFSET) \
97 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
99 /* Maximum length of an overlay vector. */
100 #define OVERLAY_COUNT_MAX \
101 ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \
102 min (PTRDIFF_MAX, SIZE_MAX) / word_size))
104 /* Flags indicating which built-in buffer-local variables
105 are permanent locals. */
106 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
108 /* Number of per-buffer variables used. */
110 int last_per_buffer_idx
;
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
*, int);
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
;
334 b
->base_buffer
= NULL
;
335 /* No one shares the text with us now. */
338 BUF_GAP_SIZE (b
) = 20;
340 /* We allocate extra 1-byte at the tail and keep it always '\0' for
341 anchoring a search. */
342 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
344 if (! BUF_BEG_ADDR (b
))
345 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
350 b
->pt_byte
= BEG_BYTE
;
351 b
->begv_byte
= BEG_BYTE
;
352 b
->zv_byte
= BEG_BYTE
;
355 BUF_GPT_BYTE (b
) = BEG_BYTE
;
358 BUF_Z_BYTE (b
) = BEG_BYTE
;
360 BUF_CHARS_MODIFF (b
) = 1;
361 BUF_OVERLAY_MODIFF (b
) = 1;
362 BUF_SAVE_MODIFF (b
) = 1;
363 buffer_set_intervals (b
, NULL
);
364 BUF_UNCHANGED_MODIFIED (b
) = 1;
365 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
366 BUF_END_UNCHANGED (b
) = 0;
367 BUF_BEG_UNCHANGED (b
) = 0;
368 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
369 b
->text
->inhibit_shrinking
= 0;
371 b
->newline_cache
= 0;
372 b
->width_run_cache
= 0;
373 BSET (b
, width_table
, Qnil
);
374 b
->prevent_redisplay_optimizations_p
= 1;
376 /* Put this on the chain of all buffers including killed ones. */
377 b
->header
.next
.buffer
= all_buffers
;
380 /* An ordinary buffer normally doesn't need markers
381 to handle BEGV and ZV. */
382 BSET (b
, pt_marker
, Qnil
);
383 BSET (b
, begv_marker
, Qnil
);
384 BSET (b
, zv_marker
, Qnil
);
386 name
= Fcopy_sequence (buffer_or_name
);
387 string_set_intervals (name
, NULL
);
388 BSET (b
, name
, name
);
390 BSET (b
, undo_list
, (SREF (name
, 0) != ' ') ? Qnil
: Qt
);
393 reset_buffer_local_variables (b
, 1);
395 BSET (b
, mark
, Fmake_marker ());
396 BUF_MARKERS (b
) = NULL
;
398 /* Put this in the alist of all live buffers. */
399 XSETBUFFER (buffer
, b
);
400 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
401 /* And run buffer-list-update-hook. */
402 if (!NILP (Vrun_hooks
))
403 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
409 /* Return a list of overlays which is a copy of the overlay list
410 LIST, but for buffer B. */
412 static struct Lisp_Overlay
*
413 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
415 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
417 for (; list
; list
= list
->next
)
419 Lisp_Object overlay
, start
, end
;
420 struct Lisp_Marker
*m
;
422 eassert (MARKERP (list
->start
));
423 m
= XMARKER (list
->start
);
424 start
= build_marker (b
, m
->charpos
, m
->bytepos
);
425 XMARKER (start
)->insertion_type
= m
->insertion_type
;
427 eassert (MARKERP (list
->end
));
428 m
= XMARKER (list
->end
);
429 end
= build_marker (b
, m
->charpos
, m
->bytepos
);
430 XMARKER (end
)->insertion_type
= m
->insertion_type
;
432 overlay
= build_overlay (start
, end
, Fcopy_sequence (list
->plist
));
434 tail
= tail
->next
= XOVERLAY (overlay
);
436 result
= tail
= XOVERLAY (overlay
);
443 /* Clone per-buffer values of buffer FROM.
445 Buffer TO gets the same per-buffer values as FROM, with the
446 following exceptions: (1) TO's name is left untouched, (2) markers
447 are copied and made to refer to TO, and (3) overlay lists are
451 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
455 FOR_EACH_PER_BUFFER_OBJECT_AT (offset
)
459 /* Don't touch the `name' which should be unique for every buffer. */
460 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
463 obj
= PER_BUFFER_VALUE (from
, offset
);
464 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
466 struct Lisp_Marker
*m
= XMARKER (obj
);
468 obj
= build_marker (to
, m
->charpos
, m
->bytepos
);
469 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
472 PER_BUFFER_VALUE (to
, offset
) = obj
;
475 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
477 buffer_set_overlays_before (to
, copy_overlays (to
, from
->overlays_before
));
478 buffer_set_overlays_after (to
, copy_overlays (to
, from
->overlays_after
));
480 /* Get (a copy of) the alist of Lisp-level local variables of FROM
481 and install that in TO. */
482 BSET (to
, local_var_alist
, buffer_lisp_local_variables (from
, 1));
486 /* If buffer B has markers to record PT, BEGV and ZV when it is not
487 current, update these markers. */
490 record_buffer_markers (struct buffer
*b
)
492 if (! NILP (BVAR (b
, pt_marker
)))
496 eassert (!NILP (BVAR (b
, begv_marker
)));
497 eassert (!NILP (BVAR (b
, zv_marker
)));
499 XSETBUFFER (buffer
, b
);
500 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
501 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
502 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
507 /* If buffer B has markers to record PT, BEGV and ZV when it is not
508 current, fetch these values into B->begv etc. */
511 fetch_buffer_markers (struct buffer
*b
)
513 if (! NILP (BVAR (b
, pt_marker
)))
517 eassert (!NILP (BVAR (b
, begv_marker
)));
518 eassert (!NILP (BVAR (b
, zv_marker
)));
520 m
= BVAR (b
, pt_marker
);
521 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
523 m
= BVAR (b
, begv_marker
);
524 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
526 m
= BVAR (b
, zv_marker
);
527 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
532 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
534 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
535 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
536 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
537 NAME should be a string which is not the name of an existing buffer.
538 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
539 such as major and minor modes, in the indirect buffer.
540 CLONE nil means the indirect buffer's state is reset to default values. */)
541 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
543 Lisp_Object buf
, tem
;
547 buf
= Fget_buffer (name
);
549 error ("Buffer name `%s' is in use", SDATA (name
));
552 base_buffer
= Fget_buffer (base_buffer
);
553 if (NILP (base_buffer
))
554 error ("No such buffer: `%s'", SDATA (tem
));
555 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
556 error ("Base buffer has been killed");
558 if (SCHARS (name
) == 0)
559 error ("Empty string for buffer name is not allowed");
561 b
= allocate_buffer ();
563 /* No double indirection - if base buffer is indirect,
564 new buffer becomes an indirect to base's base. */
565 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
566 ? XBUFFER (base_buffer
)->base_buffer
567 : XBUFFER (base_buffer
));
569 /* Use the base buffer's text object. */
570 b
->text
= b
->base_buffer
->text
;
571 /* We have no own text. */
572 b
->indirections
= -1;
573 /* Notify base buffer that we share the text now. */
574 b
->base_buffer
->indirections
++;
576 b
->pt
= b
->base_buffer
->pt
;
577 b
->begv
= b
->base_buffer
->begv
;
578 b
->zv
= b
->base_buffer
->zv
;
579 b
->pt_byte
= b
->base_buffer
->pt_byte
;
580 b
->begv_byte
= b
->base_buffer
->begv_byte
;
581 b
->zv_byte
= b
->base_buffer
->zv_byte
;
583 b
->newline_cache
= 0;
584 b
->width_run_cache
= 0;
585 BSET (b
, width_table
, Qnil
);
587 /* Put this on the chain of all buffers including killed ones. */
588 b
->header
.next
.buffer
= all_buffers
;
591 name
= Fcopy_sequence (name
);
592 string_set_intervals (name
, NULL
);
593 BSET (b
, name
, name
);
596 reset_buffer_local_variables (b
, 1);
598 /* Put this in the alist of all live buffers. */
600 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
602 BSET (b
, mark
, Fmake_marker ());
604 /* The multibyte status belongs to the base buffer. */
605 BSET (b
, enable_multibyte_characters
, BVAR (b
->base_buffer
, enable_multibyte_characters
));
607 /* Make sure the base buffer has markers for its narrowing. */
608 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
610 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
611 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
613 BSET (b
->base_buffer
, pt_marker
,
614 build_marker (b
->base_buffer
, b
->base_buffer
->pt
, b
->base_buffer
->pt_byte
));
616 BSET (b
->base_buffer
, begv_marker
,
617 build_marker (b
->base_buffer
, b
->base_buffer
->begv
, b
->base_buffer
->begv_byte
));
619 BSET (b
->base_buffer
, zv_marker
,
620 build_marker (b
->base_buffer
, b
->base_buffer
->zv
, b
->base_buffer
->zv_byte
));
622 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
627 /* Give the indirect buffer markers for its narrowing. */
628 BSET (b
, pt_marker
, build_marker (b
, b
->pt
, b
->pt_byte
));
629 BSET (b
, begv_marker
, build_marker (b
, b
->begv
, b
->begv_byte
));
630 BSET (b
, zv_marker
, build_marker (b
, b
->zv
, b
->zv_byte
));
631 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
635 struct buffer
*old_b
= current_buffer
;
637 clone_per_buffer_values (b
->base_buffer
, b
);
638 BSET (b
, filename
, Qnil
);
639 BSET (b
, file_truename
, Qnil
);
640 BSET (b
, display_count
, make_number (0));
641 BSET (b
, backed_up
, Qnil
);
642 BSET (b
, auto_save_file_name
, Qnil
);
643 set_buffer_internal_1 (b
);
644 Fset (intern ("buffer-save-without-query"), Qnil
);
645 Fset (intern ("buffer-file-number"), Qnil
);
646 Fset (intern ("buffer-stale-function"), Qnil
);
647 set_buffer_internal_1 (old_b
);
650 /* Run buffer-list-update-hook. */
651 if (!NILP (Vrun_hooks
))
652 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
657 /* Mark OV as no longer associated with B. */
660 drop_overlay (struct buffer
*b
, struct Lisp_Overlay
*ov
)
662 eassert (b
== XBUFFER (Fmarker_buffer (ov
->start
)));
663 modify_overlay (b
, marker_position (ov
->start
),
664 marker_position (ov
->end
));
665 Fset_marker (ov
->start
, Qnil
, Qnil
);
666 Fset_marker (ov
->end
, Qnil
, Qnil
);
670 /* Delete all overlays of B and reset it's overlay lists. */
673 delete_all_overlays (struct buffer
*b
)
675 struct Lisp_Overlay
*ov
, *next
;
677 for (ov
= b
->overlays_before
; ov
; ov
= next
)
679 drop_overlay (b
, ov
);
684 for (ov
= b
->overlays_after
; ov
; ov
= next
)
686 drop_overlay (b
, ov
);
691 buffer_set_overlays_before (b
, NULL
);
692 buffer_set_overlays_after (b
, 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 BSET (b
, filename
, Qnil
);
706 BSET (b
, file_truename
, Qnil
);
708 (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
);
709 b
->modtime
= make_emacs_time (0, UNKNOWN_MODTIME_NSECS
);
710 b
->modtime_size
= -1;
711 XSETFASTINT (BVAR (b
, save_length
), 0);
712 b
->last_window_start
= 1;
713 /* It is more conservative to start out "changed" than "unchanged". */
715 b
->prevent_redisplay_optimizations_p
= 1;
716 BSET (b
, backed_up
, Qnil
);
717 BUF_AUTOSAVE_MODIFF (b
) = 0;
718 b
->auto_save_failure_time
= 0;
719 BSET (b
, auto_save_file_name
, Qnil
);
720 BSET (b
, read_only
, Qnil
);
721 buffer_set_overlays_before (b
, NULL
);
722 buffer_set_overlays_after (b
, NULL
);
723 b
->overlay_center
= BEG
;
724 BSET (b
, mark_active
, Qnil
);
725 BSET (b
, point_before_scroll
, Qnil
);
726 BSET (b
, file_format
, Qnil
);
727 BSET (b
, auto_save_file_format
, Qt
);
728 BSET (b
, last_selected_window
, Qnil
);
729 BSET (b
, display_count
, make_number (0));
730 BSET (b
, display_time
, Qnil
);
731 BSET (b
, enable_multibyte_characters
,
732 BVAR (&buffer_defaults
, enable_multibyte_characters
));
733 BSET (b
, cursor_type
, BVAR (&buffer_defaults
, cursor_type
));
734 BSET (b
, extra_line_spacing
, BVAR (&buffer_defaults
, extra_line_spacing
));
736 b
->display_error_modiff
= 0;
739 /* Reset buffer B's local variables info.
740 Don't use this on a buffer that has already been in use;
741 it does not treat permanent locals consistently.
742 Instead, use Fkill_all_local_variables.
744 If PERMANENT_TOO is 1, then we reset permanent
745 buffer-local variables. If PERMANENT_TOO is 0,
746 we preserve those. */
749 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
754 /* Reset the major mode to Fundamental, together with all the
755 things that depend on the major mode.
756 default-major-mode is handled at a higher level.
757 We ignore it here. */
758 BSET (b
, major_mode
, Qfundamental_mode
);
759 BSET (b
, keymap
, Qnil
);
760 BSET (b
, mode_name
, QSFundamental
);
761 BSET (b
, minor_modes
, Qnil
);
763 /* If the standard case table has been altered and invalidated,
764 fix up its insides first. */
765 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
766 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
767 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
768 Fset_standard_case_table (Vascii_downcase_table
);
770 BSET (b
, downcase_table
, Vascii_downcase_table
);
771 BSET (b
, upcase_table
, XCHAR_TABLE (Vascii_downcase_table
)->extras
[0]);
772 BSET (b
, case_canon_table
, XCHAR_TABLE (Vascii_downcase_table
)->extras
[1]);
773 BSET (b
, case_eqv_table
, XCHAR_TABLE (Vascii_downcase_table
)->extras
[2]);
774 BSET (b
, invisibility_spec
, Qt
);
776 /* Reset all (or most) per-buffer variables to their defaults. */
778 BSET (b
, local_var_alist
, Qnil
);
781 Lisp_Object tmp
, prop
, last
= Qnil
;
782 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
783 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
785 /* If permanent-local, keep it. */
787 if (EQ (prop
, Qpermanent_local_hook
))
789 /* This is a partially permanent hook variable.
790 Preserve only the elements that want to be preserved. */
791 Lisp_Object list
, newlist
;
792 list
= XCDR (XCAR (tmp
));
796 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
798 Lisp_Object elt
= XCAR (list
);
799 /* Preserve element ELT if it's t,
800 if it is a function with a `permanent-local-hook' property,
801 or if it's not a symbol. */
804 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
805 newlist
= Fcons (elt
, newlist
);
807 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
810 /* Delete this local variable. */
811 else if (NILP (last
))
812 BSET (b
, local_var_alist
, XCDR (tmp
));
814 XSETCDR (last
, XCDR (tmp
));
817 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
818 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
819 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
821 /* For each slot that has a default value, copy that into the slot. */
822 FOR_EACH_PER_BUFFER_OBJECT_AT (offset
)
824 int idx
= PER_BUFFER_IDX (offset
);
827 || buffer_permanent_local_flags
[idx
] == 0)))
828 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
832 /* We split this away from generate-new-buffer, because rename-buffer
833 and set-visited-file-name ought to be able to use this to really
834 rename the buffer properly. */
836 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
837 Sgenerate_new_buffer_name
, 1, 2, 0,
838 doc
: /* Return a string that is the name of no existing buffer based on NAME.
839 If there is no live buffer named NAME, then return NAME.
840 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
841 \(starting at 2) until an unused name is found, and then return that name.
842 Optional second argument IGNORE specifies a name that is okay to use (if
843 it is in the sequence to be tried) even if a buffer with that name exists.
845 If NAME begins with a space (i.e., a buffer that is not normally
846 visible to users), then if buffer NAME already exists a random number
847 is first appended to NAME, to speed up finding a non-existent buffer. */)
848 (register Lisp_Object name
, Lisp_Object ignore
)
850 register Lisp_Object gentemp
, tem
, tem2
;
852 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
856 tem
= Fstring_equal (name
, ignore
);
859 tem
= Fget_buffer (name
);
863 if (!strncmp (SSDATA (name
), " ", 1)) /* see bug#1229 */
865 /* Note fileio.c:make_temp_name does random differently. */
866 tem2
= concat2 (name
, make_formatted_string
868 XFASTINT (Frandom (make_number (999999)))));
869 tem
= Fget_buffer (tem2
);
879 gentemp
= concat2 (tem2
, make_formatted_string
880 (number
, "<%"pD
"d>", ++count
));
881 tem
= Fstring_equal (gentemp
, ignore
);
884 tem
= Fget_buffer (gentemp
);
891 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
892 doc
: /* Return the name of BUFFER, as a string.
893 BUFFER defaults to the current buffer.
894 Return nil if BUFFER has been killed. */)
895 (register Lisp_Object buffer
)
898 return BVAR (current_buffer
, name
);
899 CHECK_BUFFER (buffer
);
900 return BVAR (XBUFFER (buffer
), name
);
903 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
904 doc
: /* Return name of file BUFFER is visiting, or nil if none.
905 No argument or nil as argument means use the current buffer. */)
906 (register Lisp_Object buffer
)
909 return BVAR (current_buffer
, filename
);
910 CHECK_BUFFER (buffer
);
911 return BVAR (XBUFFER (buffer
), filename
);
914 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
916 doc
: /* Return the base buffer of indirect buffer BUFFER.
917 If BUFFER is not indirect, return nil.
918 BUFFER defaults to the current buffer. */)
919 (register Lisp_Object buffer
)
922 Lisp_Object base_buffer
;
925 base
= current_buffer
->base_buffer
;
928 CHECK_BUFFER (buffer
);
929 base
= XBUFFER (buffer
)->base_buffer
;
934 XSETBUFFER (base_buffer
, base
);
938 DEFUN ("buffer-local-value", Fbuffer_local_value
,
939 Sbuffer_local_value
, 2, 2, 0,
940 doc
: /* Return the value of VARIABLE in BUFFER.
941 If VARIABLE does not have a buffer-local binding in BUFFER, the value
942 is the default binding of the variable. */)
943 (register Lisp_Object variable
, register Lisp_Object buffer
)
945 register Lisp_Object result
= buffer_local_value_1 (variable
, buffer
);
947 if (EQ (result
, Qunbound
))
948 xsignal1 (Qvoid_variable
, variable
);
954 /* Like Fbuffer_local_value, but return Qunbound if the variable is
958 buffer_local_value_1 (Lisp_Object variable
, Lisp_Object buffer
)
960 register struct buffer
*buf
;
961 register Lisp_Object result
;
962 struct Lisp_Symbol
*sym
;
964 CHECK_SYMBOL (variable
);
965 CHECK_BUFFER (buffer
);
966 buf
= XBUFFER (buffer
);
967 sym
= XSYMBOL (variable
);
970 switch (sym
->redirect
)
972 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
973 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
974 case SYMBOL_LOCALIZED
:
975 { /* Look in local_var_alist. */
976 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
977 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
978 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
982 { /* What binding is loaded right now? */
983 Lisp_Object current_alist_element
= blv
->valcell
;
985 /* The value of the currently loaded binding is not
986 stored in it, but rather in the realvalue slot.
987 Store that value into the binding it belongs to
988 in case that is the one we are about to use. */
990 XSETCDR (current_alist_element
,
991 do_symval_forwarding (blv
->fwd
));
993 /* Now get the (perhaps updated) value out of the binding. */
994 result
= XCDR (result
);
997 result
= Fdefault_value (variable
);
1000 case SYMBOL_FORWARDED
:
1002 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
1003 if (BUFFER_OBJFWDP (fwd
))
1004 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
1006 result
= Fdefault_value (variable
);
1015 /* Return an alist of the Lisp-level buffer-local bindings of
1016 buffer BUF. That is, don't include the variables maintained
1017 in special slots in the buffer object.
1018 If CLONE is zero elements of the form (VAR . unbound) are replaced
1022 buffer_lisp_local_variables (struct buffer
*buf
, int clone
)
1024 Lisp_Object result
= Qnil
;
1025 register Lisp_Object tail
;
1026 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1028 Lisp_Object val
, elt
;
1032 /* Reference each variable in the alist in buf.
1033 If inquiring about the current buffer, this gets the current values,
1034 so store them into the alist so the alist is up to date.
1035 If inquiring about some other buffer, this swaps out any values
1036 for that buffer, making the alist up to date automatically. */
1037 val
= find_symbol_value (XCAR (elt
));
1038 /* Use the current buffer value only if buf is the current buffer. */
1039 if (buf
!= current_buffer
)
1042 result
= Fcons (!clone
&& EQ (val
, Qunbound
)
1044 : Fcons (XCAR (elt
), val
),
1051 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1052 Sbuffer_local_variables
, 0, 1, 0,
1053 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1054 Most elements look like (SYMBOL . VALUE), describing one variable.
1055 For a symbol that is locally unbound, just the symbol appears in the value.
1056 Note that storing new VALUEs in these elements doesn't change the variables.
1057 No argument or nil as argument means use current buffer as BUFFER. */)
1058 (register Lisp_Object buffer
)
1060 register struct buffer
*buf
;
1061 register Lisp_Object result
;
1064 buf
= current_buffer
;
1067 CHECK_BUFFER (buffer
);
1068 buf
= XBUFFER (buffer
);
1071 result
= buffer_lisp_local_variables (buf
, 0);
1073 /* Add on all the variables stored in special slots. */
1077 FOR_EACH_PER_BUFFER_OBJECT_AT (offset
)
1079 idx
= PER_BUFFER_IDX (offset
);
1080 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1081 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1083 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1084 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1085 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1094 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1096 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1097 No argument or nil as argument means use current buffer as BUFFER. */)
1098 (register Lisp_Object buffer
)
1100 register struct buffer
*buf
;
1102 buf
= current_buffer
;
1105 CHECK_BUFFER (buffer
);
1106 buf
= XBUFFER (buffer
);
1109 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1112 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1114 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1115 A non-nil FLAG means mark the buffer modified. */)
1116 (register Lisp_Object flag
)
1118 register int already
;
1119 register Lisp_Object fn
;
1120 Lisp_Object buffer
, window
;
1122 #ifdef CLASH_DETECTION
1123 /* If buffer becoming modified, lock the file.
1124 If buffer becoming unmodified, unlock the file. */
1126 fn
= BVAR (current_buffer
, file_truename
);
1127 /* Test buffer-file-name so that binding it to nil is effective. */
1128 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1130 already
= SAVE_MODIFF
< MODIFF
;
1131 if (!already
&& !NILP (flag
))
1133 else if (already
&& NILP (flag
))
1136 #endif /* CLASH_DETECTION */
1138 /* Here we have a problem. SAVE_MODIFF is used here to encode
1139 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1140 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1141 modify SAVE_MODIFF to affect one, we may affect the other
1143 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1144 if SAVE_MODIFF<auto_save_modified that means we risk changing
1145 recent-auto-save-p from t to nil.
1146 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1147 we risk changing recent-auto-save-p from nil to t. */
1148 SAVE_MODIFF
= (NILP (flag
)
1149 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1151 /* Let's try to preserve recent-auto-save-p. */
1152 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1153 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1154 we can either decrease SAVE_MODIFF and auto_save_modified
1155 or increase MODIFF. */
1158 /* Set update_mode_lines only if buffer is displayed in some window.
1159 Packages like jit-lock or lazy-lock preserve a buffer's modified
1160 state by recording/restoring the state around blocks of code.
1161 Setting update_mode_lines makes redisplay consider all windows
1162 (on all frames). Stealth fontification of buffers not displayed
1163 would incur additional redisplay costs if we'd set
1164 update_modes_lines unconditionally.
1166 Ideally, I think there should be another mechanism for fontifying
1167 buffers without "modifying" buffers, or redisplay should be
1168 smarter about updating the `*' in mode lines. --gerd */
1169 XSETBUFFER (buffer
, current_buffer
);
1170 window
= Fget_buffer_window (buffer
, Qt
);
1171 if (WINDOWP (window
))
1173 ++update_mode_lines
;
1174 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1180 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1181 Srestore_buffer_modified_p
, 1, 1, 0,
1182 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1183 It is not ensured that mode lines will be updated to show the modified
1184 state of the current buffer. Use with care. */)
1187 #ifdef CLASH_DETECTION
1190 /* If buffer becoming modified, lock the file.
1191 If buffer becoming unmodified, unlock the file. */
1193 fn
= BVAR (current_buffer
, file_truename
);
1194 /* Test buffer-file-name so that binding it to nil is effective. */
1195 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1197 int already
= SAVE_MODIFF
< MODIFF
;
1198 if (!already
&& !NILP (flag
))
1200 else if (already
&& NILP (flag
))
1203 #endif /* CLASH_DETECTION */
1205 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1209 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1211 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1212 Each buffer has a tick counter which is incremented each time the
1213 text in that buffer is changed. It wraps around occasionally.
1214 No argument or nil as argument means use current buffer as BUFFER. */)
1215 (register Lisp_Object buffer
)
1217 register struct buffer
*buf
;
1219 buf
= current_buffer
;
1222 CHECK_BUFFER (buffer
);
1223 buf
= XBUFFER (buffer
);
1226 return make_number (BUF_MODIFF (buf
));
1229 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1230 Sbuffer_chars_modified_tick
, 0, 1, 0,
1231 doc
: /* Return BUFFER's character-change tick counter.
1232 Each buffer has a character-change tick counter, which is set to the
1233 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1234 time text in that buffer is inserted or deleted. By comparing the
1235 values returned by two individual calls of `buffer-chars-modified-tick',
1236 you can tell whether a character change occurred in that buffer in
1237 between these calls. No argument or nil as argument means use current
1238 buffer as BUFFER. */)
1239 (register Lisp_Object buffer
)
1241 register struct buffer
*buf
;
1243 buf
= current_buffer
;
1246 CHECK_BUFFER (buffer
);
1247 buf
= XBUFFER (buffer
);
1250 return make_number (BUF_CHARS_MODIFF (buf
));
1253 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1254 "(list (read-string \"Rename buffer (to new name): \" \
1255 nil 'buffer-name-history (buffer-name (current-buffer))) \
1256 current-prefix-arg)",
1257 doc
: /* Change current buffer's name to NEWNAME (a string).
1258 If second arg UNIQUE is nil or omitted, it is an error if a
1259 buffer named NEWNAME already exists.
1260 If UNIQUE is non-nil, come up with a new name using
1261 `generate-new-buffer-name'.
1262 Interactively, you can set UNIQUE with a prefix argument.
1263 We return the name we actually gave the buffer.
1264 This does not change the name of the visited file (if any). */)
1265 (register Lisp_Object newname
, Lisp_Object unique
)
1267 register Lisp_Object tem
, buf
;
1269 CHECK_STRING (newname
);
1271 if (SCHARS (newname
) == 0)
1272 error ("Empty string is invalid as a buffer name");
1274 tem
= Fget_buffer (newname
);
1277 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1278 rename the buffer automatically so you can create another
1279 with the original name. It makes UNIQUE equivalent to
1280 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1281 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1282 return BVAR (current_buffer
, name
);
1284 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1286 error ("Buffer name `%s' is in use", SDATA (newname
));
1289 BSET (current_buffer
, name
, newname
);
1291 /* Catch redisplay's attention. Unless we do this, the mode lines for
1292 any windows displaying current_buffer will stay unchanged. */
1293 update_mode_lines
++;
1295 XSETBUFFER (buf
, current_buffer
);
1296 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1297 if (NILP (BVAR (current_buffer
, filename
))
1298 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1299 call0 (intern ("rename-auto-save-file"));
1301 /* Run buffer-list-update-hook. */
1302 if (!NILP (Vrun_hooks
))
1303 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1305 /* Refetch since that last call may have done GC. */
1306 return BVAR (current_buffer
, name
);
1309 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1310 doc
: /* Return most recently selected buffer other than BUFFER.
1311 Buffers not visible in windows are preferred to visible buffers, unless
1312 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1313 BUFFER unless it denotes a live buffer. If the optional third argument
1314 FRAME is non-nil, use that frame's buffer list instead of the selected
1315 frame's buffer list.
1317 The buffer is found by scanning the selected or specified frame's buffer
1318 list first, followed by the list of all buffers. If no other buffer
1319 exists, return the buffer `*scratch*' (creating it if necessary). */)
1320 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1322 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1323 Lisp_Object tail
, buf
, pred
;
1324 Lisp_Object notsogood
= Qnil
;
1327 frame
= selected_frame
;
1329 CHECK_FRAME (frame
);
1331 pred
= frame_buffer_predicate (frame
);
1332 /* Consider buffers that have been seen in the frame first. */
1333 tail
= XFRAME (frame
)->buffer_list
;
1334 for (; CONSP (tail
); tail
= XCDR (tail
))
1337 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1338 && !NILP (BVAR (XBUFFER (buf
), name
))
1339 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1340 /* If the frame has a buffer_predicate, disregard buffers that
1341 don't fit the predicate. */
1342 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1344 if (!NILP (visible_ok
)
1345 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1347 else if (NILP (notsogood
))
1352 /* Consider alist of all buffers next. */
1353 tail
= Vbuffer_alist
;
1354 for (; CONSP (tail
); tail
= XCDR (tail
))
1356 buf
= Fcdr (XCAR (tail
));
1357 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1358 && !NILP (BVAR (XBUFFER (buf
), name
))
1359 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1360 /* If the frame has a buffer_predicate, disregard buffers that
1361 don't fit the predicate. */
1362 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1364 if (!NILP (visible_ok
)
1365 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1367 else if (NILP (notsogood
))
1372 if (!NILP (notsogood
))
1376 buf
= Fget_buffer (build_string ("*scratch*"));
1379 buf
= Fget_buffer_create (build_string ("*scratch*"));
1380 Fset_buffer_major_mode (buf
);
1386 /* The following function is a safe variant of Fother_buffer: It doesn't
1387 pay attention to any frame-local buffer lists, doesn't care about
1388 visibility of buffers, and doesn't evaluate any frame predicates. */
1391 other_buffer_safely (Lisp_Object buffer
)
1393 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1394 Lisp_Object tail
, buf
;
1396 tail
= Vbuffer_alist
;
1397 for (; CONSP (tail
); tail
= XCDR (tail
))
1399 buf
= Fcdr (XCAR (tail
));
1400 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1401 && !NILP (BVAR (XBUFFER (buf
), name
))
1402 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1406 buf
= Fget_buffer (build_string ("*scratch*"));
1409 buf
= Fget_buffer_create (build_string ("*scratch*"));
1410 Fset_buffer_major_mode (buf
);
1416 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1418 doc
: /* Start keeping undo information for buffer BUFFER.
1419 No argument or nil as argument means do this for the current buffer. */)
1420 (register Lisp_Object buffer
)
1422 Lisp_Object real_buffer
;
1425 XSETBUFFER (real_buffer
, current_buffer
);
1428 real_buffer
= Fget_buffer (buffer
);
1429 if (NILP (real_buffer
))
1433 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1434 BSET (XBUFFER (real_buffer
), undo_list
, Qnil
);
1439 /* Truncate undo list and shrink the gap of BUFFER. */
1442 compact_buffer (struct buffer
*buffer
)
1444 /* Verify indirection counters. */
1445 if (buffer
->base_buffer
)
1447 eassert (buffer
->indirections
== -1);
1448 eassert (buffer
->base_buffer
->indirections
> 0);
1451 eassert (buffer
->indirections
>= 0);
1453 /* Skip dead buffers, indirect buffers and buffers
1454 which aren't changed since last compaction. */
1455 if (!NILP (buffer
->INTERNAL_FIELD (name
))
1456 && (buffer
->base_buffer
== NULL
)
1457 && (buffer
->text
->compact
!= buffer
->text
->modiff
))
1459 /* If a buffer's undo list is Qt, that means that undo is
1460 turned off in that buffer. Calling truncate_undo_list on
1461 Qt tends to return NULL, which effectively turns undo back on.
1462 So don't call truncate_undo_list if undo_list is Qt. */
1463 if (!EQ (buffer
->INTERNAL_FIELD (undo_list
), Qt
))
1464 truncate_undo_list (buffer
);
1466 /* Shrink buffer gaps. */
1467 if (!buffer
->text
->inhibit_shrinking
)
1469 /* If a buffer's gap size is more than 10% of the buffer
1470 size, or larger than 2000 bytes, then shrink it
1471 accordingly. Keep a minimum size of 20 bytes. */
1472 int size
= min (2000, max (20, (buffer
->text
->z_byte
/ 10)));
1474 if (buffer
->text
->gap_size
> size
)
1476 struct buffer
*save_current
= current_buffer
;
1477 current_buffer
= buffer
;
1478 make_gap (-(buffer
->text
->gap_size
- size
));
1479 current_buffer
= save_current
;
1482 buffer
->text
->compact
= buffer
->text
->modiff
;
1488 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1489 doc
: /* Kill the buffer specified by BUFFER-OR-NAME.
1490 The argument may be a buffer or the name of an existing buffer.
1491 Argument nil or omitted means kill the current buffer. Return t if the
1492 buffer is actually killed, nil otherwise.
1494 The functions in `kill-buffer-query-functions' are called with the
1495 buffer to be killed as the current buffer. If any of them returns nil,
1496 the buffer is not killed. The hook `kill-buffer-hook' is run before the
1497 buffer is actually killed. The buffer being killed will be current
1498 while the hook is running. Functions called by any of these hooks are
1499 supposed to not change the current buffer.
1501 Any processes that have this buffer as the `process-buffer' are killed
1502 with SIGHUP. This function calls `replace-buffer-in-windows' for
1503 cleaning up all windows currently displaying the buffer to be killed. */)
1504 (Lisp_Object buffer_or_name
)
1507 register struct buffer
*b
;
1508 register Lisp_Object tem
;
1509 register struct Lisp_Marker
*m
;
1510 struct gcpro gcpro1
;
1512 if (NILP (buffer_or_name
))
1513 buffer
= Fcurrent_buffer ();
1515 buffer
= Fget_buffer (buffer_or_name
);
1517 nsberror (buffer_or_name
);
1519 b
= XBUFFER (buffer
);
1521 /* Avoid trouble for buffer already dead. */
1522 if (NILP (BVAR (b
, name
)))
1525 /* Query if the buffer is still modified. */
1526 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1527 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1530 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1531 BVAR (b
, name
), make_number (0)));
1537 /* Run hooks with the buffer to be killed the current buffer. */
1539 ptrdiff_t count
= SPECPDL_INDEX ();
1540 Lisp_Object arglist
[1];
1542 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1543 set_buffer_internal (b
);
1545 /* First run the query functions; if any query is answered no,
1546 don't kill the buffer. */
1547 arglist
[0] = Qkill_buffer_query_functions
;
1548 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1550 return unbind_to (count
, Qnil
);
1552 /* Then run the hooks. */
1553 Frun_hooks (1, &Qkill_buffer_hook
);
1554 unbind_to (count
, Qnil
);
1557 /* If the hooks have killed the buffer, exit now. */
1558 if (NILP (BVAR (b
, name
)))
1561 /* We have no more questions to ask. Verify that it is valid
1562 to kill the buffer. This must be done after the questions
1563 since anything can happen within do_yes_or_no_p. */
1565 /* Don't kill the minibuffer now current. */
1566 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1569 /* When we kill an ordinary buffer which shares it's buffer text
1570 with indirect buffer(s), we must kill indirect buffer(s) too.
1571 We do it at this stage so nothing terrible happens if they
1572 ask questions or their hooks get errors. */
1573 if (!b
->base_buffer
&& b
->indirections
> 0)
1575 struct buffer
*other
;
1579 FOR_EACH_BUFFER (other
)
1580 if (other
->base_buffer
== b
)
1583 XSETBUFFER (buf
, other
);
1589 /* Exit if we now have killed the base buffer (Bug#11665). */
1590 if (NILP (BVAR (b
, name
)))
1594 /* Run replace_buffer_in_windows before making another buffer current
1595 since set-window-buffer-start-and-point will refuse to make another
1596 buffer current if the selected window does not show the current
1597 buffer. (Bug#10114) */
1598 replace_buffer_in_windows (buffer
);
1600 /* Exit if replacing the buffer in windows has killed our buffer. */
1601 if (NILP (BVAR (b
, name
)))
1604 /* Make this buffer not be current. Exit if it is the sole visible
1606 if (b
== current_buffer
)
1608 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1610 if (b
== current_buffer
)
1614 /* If the buffer now current is shown in the minibuffer and our buffer
1615 is the sole other buffer give up. */
1616 XSETBUFFER (tem
, current_buffer
);
1617 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
)
1618 && EQ (buffer
, Fother_buffer (buffer
, Qnil
, Qnil
)))
1621 /* Now there is no question: we can kill the buffer. */
1623 #ifdef CLASH_DETECTION
1624 /* Unlock this buffer's file, if it is locked. */
1626 #endif /* CLASH_DETECTION */
1629 kill_buffer_processes (buffer
);
1632 /* Killing buffer processes may run sentinels which may have killed
1634 if (NILP (BVAR (b
, name
)))
1637 /* These may run Lisp code and into infinite loops (if someone
1638 insisted on circular lists) so allow quitting here. */
1639 frames_discard_buffer (buffer
);
1641 clear_charpos_cache (b
);
1643 tem
= Vinhibit_quit
;
1645 /* Remove the buffer from the list of all buffers. */
1646 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1647 /* If replace_buffer_in_windows didn't do its job fix that now. */
1648 replace_buffer_in_windows_safely (buffer
);
1649 Vinhibit_quit
= tem
;
1651 /* Delete any auto-save file, if we saved it in this session.
1652 But not if the buffer is modified. */
1653 if (STRINGP (BVAR (b
, auto_save_file_name
))
1654 && BUF_AUTOSAVE_MODIFF (b
) != 0
1655 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1656 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1657 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1660 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1661 if (! NILP (delete))
1662 internal_delete_file (BVAR (b
, auto_save_file_name
));
1665 /* Deleting an auto-save file could have killed our buffer. */
1666 if (NILP (BVAR (b
, name
)))
1671 /* Unchain all markers that belong to this indirect buffer.
1672 Don't unchain the markers that belong to the base buffer
1673 or its other indirect buffers. */
1674 for (m
= BUF_MARKERS (b
); m
; )
1676 struct Lisp_Marker
*next
= m
->next
;
1684 /* Unchain all markers of this buffer and its indirect buffers.
1685 and leave them pointing nowhere. */
1686 for (m
= BUF_MARKERS (b
); m
; )
1688 struct Lisp_Marker
*next
= m
->next
;
1693 BUF_MARKERS (b
) = NULL
;
1694 buffer_set_intervals (b
, NULL
);
1696 /* Perhaps we should explicitly free the interval tree here... */
1699 /* Reset the local variables, so that this buffer's local values
1700 won't be protected from GC. They would be protected
1701 if they happened to remain cached in their symbols.
1702 This gets rid of them for certain. */
1703 swap_out_buffer_local_variables (b
);
1704 reset_buffer_local_variables (b
, 1);
1706 BSET (b
, name
, Qnil
);
1711 /* Notify our base buffer that we don't share the text anymore. */
1712 eassert (b
->indirections
== -1);
1713 b
->base_buffer
->indirections
--;
1714 eassert (b
->base_buffer
->indirections
>= 0);
1717 /* No one shares our buffer text, can free it. */
1718 free_buffer_text (b
);
1720 if (b
->newline_cache
)
1722 free_region_cache (b
->newline_cache
);
1723 b
->newline_cache
= 0;
1725 if (b
->width_run_cache
)
1727 free_region_cache (b
->width_run_cache
);
1728 b
->width_run_cache
= 0;
1730 BSET (b
, width_table
, Qnil
);
1732 BSET (b
, undo_list
, Qnil
);
1734 /* Run buffer-list-update-hook. */
1735 if (!NILP (Vrun_hooks
))
1736 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1741 /* Move association for BUFFER to the front of buffer (a)lists. Since
1742 we do this each time BUFFER is selected visibly, the more recently
1743 selected buffers are always closer to the front of those lists. This
1744 means that other_buffer is more likely to choose a relevant buffer.
1746 Note that this moves BUFFER to the front of the buffer lists of the
1747 selected frame even if BUFFER is not shown there. If BUFFER is not
1748 shown in the selected frame, consider the present behavior a feature.
1749 `select-window' gets this right since it shows BUFFER in the selected
1750 window when calling us. */
1753 record_buffer (Lisp_Object buffer
)
1755 Lisp_Object aelt
, aelt_cons
, tem
;
1756 register struct frame
*f
= XFRAME (selected_frame
);
1758 CHECK_BUFFER (buffer
);
1760 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1761 Don't allow quitting since this might leave the buffer list in an
1762 inconsistent state. */
1763 tem
= Vinhibit_quit
;
1765 aelt
= Frassq (buffer
, Vbuffer_alist
);
1766 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1767 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1768 XSETCDR (aelt_cons
, Vbuffer_alist
);
1769 Vbuffer_alist
= aelt_cons
;
1770 Vinhibit_quit
= tem
;
1772 /* Update buffer list of selected frame. */
1773 FSET (f
, buffer_list
, Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
)));
1774 FSET (f
, buried_buffer_list
, Fdelq (buffer
, f
->buried_buffer_list
));
1776 /* Run buffer-list-update-hook. */
1777 if (!NILP (Vrun_hooks
))
1778 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1782 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1783 buffer is killed. For the selected frame's buffer list this moves
1784 BUFFER to its end even if it was never shown in that frame. If
1785 this happens we have a feature, hence `bury-buffer-internal' should be
1786 called only when BUFFER was shown in the selected frame. */
1788 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1790 doc
: /* Move BUFFER to the end of the buffer list. */)
1791 (Lisp_Object buffer
)
1793 Lisp_Object aelt
, aelt_cons
, tem
;
1794 register struct frame
*f
= XFRAME (selected_frame
);
1796 CHECK_BUFFER (buffer
);
1798 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1799 Don't allow quitting since this might leave the buffer list in an
1800 inconsistent state. */
1801 tem
= Vinhibit_quit
;
1803 aelt
= Frassq (buffer
, Vbuffer_alist
);
1804 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1805 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1806 XSETCDR (aelt_cons
, Qnil
);
1807 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1808 Vinhibit_quit
= tem
;
1810 /* Update buffer lists of selected frame. */
1811 FSET (f
, buffer_list
, Fdelq (buffer
, f
->buffer_list
));
1812 FSET (f
, buried_buffer_list
,
1813 Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
)));
1815 /* Run buffer-list-update-hook. */
1816 if (!NILP (Vrun_hooks
))
1817 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1822 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1823 doc
: /* Set an appropriate major mode for BUFFER.
1824 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1825 according to `default-major-mode'.
1826 Use this function before selecting the buffer, since it may need to inspect
1827 the current buffer's major mode. */)
1828 (Lisp_Object buffer
)
1831 Lisp_Object function
;
1833 CHECK_BUFFER (buffer
);
1835 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1836 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1837 function
= find_symbol_value (intern ("initial-major-mode"));
1840 function
= BVAR (&buffer_defaults
, major_mode
);
1842 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1843 function
= BVAR (current_buffer
, major_mode
);
1846 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1849 count
= SPECPDL_INDEX ();
1851 /* To select a nonfundamental mode,
1852 select the buffer temporarily and then call the mode function. */
1854 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1856 Fset_buffer (buffer
);
1859 return unbind_to (count
, Qnil
);
1862 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1863 doc
: /* Return the current buffer as a Lisp object. */)
1866 register Lisp_Object buf
;
1867 XSETBUFFER (buf
, current_buffer
);
1871 /* Set the current buffer to B.
1873 We previously set windows_or_buffers_changed here to invalidate
1874 global unchanged information in beg_unchanged and end_unchanged.
1875 This is no longer necessary because we now compute unchanged
1876 information on a buffer-basis. Every action affecting other
1877 windows than the selected one requires a select_window at some
1878 time, and that increments windows_or_buffers_changed. */
1881 set_buffer_internal (register struct buffer
*b
)
1883 if (current_buffer
!= b
)
1884 set_buffer_internal_1 (b
);
1887 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1888 This is used by redisplay. */
1891 set_buffer_internal_1 (register struct buffer
*b
)
1893 register struct buffer
*old_buf
;
1894 register Lisp_Object tail
;
1896 #ifdef USE_MMAP_FOR_BUFFERS
1897 if (b
->text
->beg
== NULL
)
1898 enlarge_buffer_text (b
, 0);
1899 #endif /* USE_MMAP_FOR_BUFFERS */
1901 if (current_buffer
== b
)
1904 old_buf
= current_buffer
;
1906 last_known_column_point
= -1; /* invalidate indentation cache */
1910 /* Put the undo list back in the base buffer, so that it appears
1911 that an indirect buffer shares the undo list of its base. */
1912 if (old_buf
->base_buffer
)
1913 BSET (old_buf
->base_buffer
, undo_list
, BVAR (old_buf
, undo_list
));
1915 /* If the old current buffer has markers to record PT, BEGV and ZV
1916 when it is not current, update them now. */
1917 record_buffer_markers (old_buf
);
1920 /* Get the undo list from the base buffer, so that it appears
1921 that an indirect buffer shares the undo list of its base. */
1923 BSET (b
, undo_list
, BVAR (b
->base_buffer
, undo_list
));
1925 /* If the new current buffer has markers to record PT, BEGV and ZV
1926 when it is not current, fetch them now. */
1927 fetch_buffer_markers (b
);
1929 /* Look down buffer's list of local Lisp variables
1930 to find and update any that forward into C variables. */
1934 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1936 Lisp_Object var
= XCAR (XCAR (tail
));
1937 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1938 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1939 && SYMBOL_BLV (sym
)->fwd
)
1940 /* Just reference the variable
1941 to cause it to become set for this buffer. */
1942 Fsymbol_value (var
);
1945 /* Do the same with any others that were local to the previous buffer */
1946 while (b
!= old_buf
&& (b
= old_buf
, b
));
1949 /* Switch to buffer B temporarily for redisplay purposes.
1950 This avoids certain things that don't need to be done within redisplay. */
1953 set_buffer_temp (struct buffer
*b
)
1955 register struct buffer
*old_buf
;
1957 if (current_buffer
== b
)
1960 old_buf
= current_buffer
;
1963 /* If the old current buffer has markers to record PT, BEGV and ZV
1964 when it is not current, update them now. */
1965 record_buffer_markers (old_buf
);
1967 /* If the new current buffer has markers to record PT, BEGV and ZV
1968 when it is not current, fetch them now. */
1969 fetch_buffer_markers (b
);
1972 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1973 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1974 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1975 also `save-excursion' when you want to make a buffer current
1976 temporarily. This function does not display the buffer, so its effect
1977 ends when the current command terminates. Use `switch-to-buffer' or
1978 `pop-to-buffer' to switch buffers permanently. */)
1979 (register Lisp_Object buffer_or_name
)
1981 register Lisp_Object buffer
;
1982 buffer
= Fget_buffer (buffer_or_name
);
1984 nsberror (buffer_or_name
);
1985 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1986 error ("Selecting deleted buffer");
1987 set_buffer_internal (XBUFFER (buffer
));
1991 /* Set the current buffer to BUFFER provided it is alive. */
1994 set_buffer_if_live (Lisp_Object buffer
)
1996 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1997 Fset_buffer (buffer
);
2001 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
2002 Sbarf_if_buffer_read_only
, 0, 0, 0,
2003 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
2006 if (!NILP (BVAR (current_buffer
, read_only
))
2007 && NILP (Vinhibit_read_only
))
2008 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
2012 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2013 doc
: /* Delete the entire contents of the current buffer.
2014 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2015 so the buffer is truly empty after this. */)
2022 current_buffer
->last_window_start
= 1;
2023 /* Prevent warnings, or suspension of auto saving, that would happen
2024 if future size is less than past size. Use of erase-buffer
2025 implies that the future text is not really related to the past text. */
2026 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
2031 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
2033 CHECK_NUMBER_COERCE_MARKER (*b
);
2034 CHECK_NUMBER_COERCE_MARKER (*e
);
2036 if (XINT (*b
) > XINT (*e
))
2039 tem
= *b
; *b
= *e
; *e
= tem
;
2042 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
2043 args_out_of_range (*b
, *e
);
2046 /* Advance BYTE_POS up to a character boundary
2047 and return the adjusted position. */
2050 advance_to_char_boundary (ptrdiff_t byte_pos
)
2054 if (byte_pos
== BEG
)
2055 /* Beginning of buffer is always a character boundary. */
2058 c
= FETCH_BYTE (byte_pos
);
2059 if (! CHAR_HEAD_P (c
))
2061 /* We should advance BYTE_POS only when C is a constituent of a
2062 multibyte sequence. */
2063 ptrdiff_t orig_byte_pos
= byte_pos
;
2068 c
= FETCH_BYTE (byte_pos
);
2070 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2072 if (byte_pos
< orig_byte_pos
)
2073 byte_pos
= orig_byte_pos
;
2074 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2075 surely advance to the correct character boundary. If C is
2076 not, BYTE_POS was unchanged. */
2082 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2084 doc
: /* Swap the text between current buffer and BUFFER. */)
2085 (Lisp_Object buffer
)
2087 struct buffer
*other_buffer
;
2088 CHECK_BUFFER (buffer
);
2089 other_buffer
= XBUFFER (buffer
);
2091 if (NILP (BVAR (other_buffer
, name
)))
2092 error ("Cannot swap a dead buffer's text");
2094 /* Actually, it probably works just fine.
2095 * if (other_buffer == current_buffer)
2096 * error ("Cannot swap a buffer's text with itself"); */
2098 /* Actually, this may be workable as well, tho probably only if they're
2100 if (other_buffer
->base_buffer
2101 || current_buffer
->base_buffer
)
2102 error ("Cannot swap indirect buffers's text");
2104 { /* This is probably harder to make work. */
2105 struct buffer
*other
;
2106 FOR_EACH_BUFFER (other
)
2107 if (other
->base_buffer
== other_buffer
2108 || other
->base_buffer
== current_buffer
)
2109 error ("One of the buffers to swap has indirect buffers");
2112 #define swapfield(field, type) \
2114 type tmp##field = other_buffer->field; \
2115 other_buffer->field = current_buffer->field; \
2116 current_buffer->field = tmp##field; \
2118 #define swapfield_(field, type) \
2120 type tmp##field = BVAR (other_buffer, field); \
2121 BSET (other_buffer, field, BVAR (current_buffer, field)); \
2122 BSET (current_buffer, field, tmp##field); \
2125 swapfield (own_text
, struct buffer_text
);
2126 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2127 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2129 r_alloc_reset_variable ((void **) ¤t_buffer
->own_text
.beg
,
2130 (void **) &other_buffer
->own_text
.beg
);
2131 r_alloc_reset_variable ((void **) &other_buffer
->own_text
.beg
,
2132 (void **) ¤t_buffer
->own_text
.beg
);
2133 #endif /* REL_ALLOC */
2135 swapfield (pt
, ptrdiff_t);
2136 swapfield (pt_byte
, ptrdiff_t);
2137 swapfield (begv
, ptrdiff_t);
2138 swapfield (begv_byte
, ptrdiff_t);
2139 swapfield (zv
, ptrdiff_t);
2140 swapfield (zv_byte
, ptrdiff_t);
2141 eassert (!current_buffer
->base_buffer
);
2142 eassert (!other_buffer
->base_buffer
);
2143 swapfield (indirections
, ptrdiff_t);
2144 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2145 swapfield (newline_cache
, struct region_cache
*);
2146 swapfield (width_run_cache
, struct region_cache
*);
2147 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2148 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2149 swapfield (overlays_before
, struct Lisp_Overlay
*);
2150 swapfield (overlays_after
, struct Lisp_Overlay
*);
2151 swapfield (overlay_center
, ptrdiff_t);
2152 swapfield_ (undo_list
, Lisp_Object
);
2153 swapfield_ (mark
, Lisp_Object
);
2154 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2155 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2156 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2157 /* FIXME: Not sure what we should do with these *_marker fields.
2158 Hopefully they're just nil anyway. */
2159 swapfield_ (pt_marker
, Lisp_Object
);
2160 swapfield_ (begv_marker
, Lisp_Object
);
2161 swapfield_ (zv_marker
, Lisp_Object
);
2162 BSET (current_buffer
, point_before_scroll
, Qnil
);
2163 BSET (other_buffer
, point_before_scroll
, Qnil
);
2165 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2166 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2167 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2168 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2169 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2170 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2171 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2173 struct Lisp_Marker
*m
;
2174 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2175 if (m
->buffer
== other_buffer
)
2176 m
->buffer
= current_buffer
;
2178 /* Since there's no indirect buffer in sight, markers on
2179 BUF_MARKERS(buf) should either be for `buf' or dead. */
2180 eassert (!m
->buffer
);
2181 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2182 if (m
->buffer
== current_buffer
)
2183 m
->buffer
= other_buffer
;
2185 /* Since there's no indirect buffer in sight, markers on
2186 BUF_MARKERS(buf) should either be for `buf' or dead. */
2187 eassert (!m
->buffer
);
2189 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2190 So since we just swapped the markers between the two buffers, we need
2191 to undo the effect of this swap for window markers. */
2192 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2193 Lisp_Object buf1
, buf2
;
2194 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2196 while (NILP (Fmemq (w
, ws
)))
2199 if (MARKERP (XWINDOW (w
)->pointm
)
2200 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2201 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2202 Fset_marker (XWINDOW (w
)->pointm
,
2204 (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2205 XWINDOW (w
)->buffer
);
2206 w
= Fnext_window (w
, Qt
, Qt
);
2210 if (current_buffer
->text
->intervals
)
2211 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2212 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2213 if (other_buffer
->text
->intervals
)
2214 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2215 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2220 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2222 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2223 If FLAG is t, this makes the buffer a multibyte buffer.
2224 If FLAG is nil, this makes the buffer a single-byte buffer.
2225 In these cases, the buffer contents remain unchanged as a sequence of
2226 bytes but the contents viewed as characters do change.
2227 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2228 all eight-bit bytes to eight-bit characters.
2229 If the multibyte flag was really changed, undo information of the
2230 current buffer is cleared. */)
2233 struct Lisp_Marker
*tail
, *markers
;
2234 struct buffer
*other
;
2236 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2237 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2238 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2239 struct gcpro gcpro1
;
2241 if (current_buffer
->base_buffer
)
2242 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2244 /* Do nothing if nothing actually changes. */
2245 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2250 /* Don't record these buffer changes. We will put a special undo entry
2252 BSET (current_buffer
, undo_list
, Qt
);
2254 /* If the cached position is for this buffer, clear it out. */
2255 clear_charpos_cache (current_buffer
);
2258 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2260 begv
= BEGV
, zv
= ZV
;
2267 ptrdiff_t pos
, stop
;
2270 /* Do this first, so it can use CHAR_TO_BYTE
2271 to calculate the old correspondences. */
2272 set_intervals_multibyte (0);
2274 BSET (current_buffer
, enable_multibyte_characters
, Qnil
);
2280 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2283 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2284 tail
->charpos
= tail
->bytepos
;
2286 /* Convert multibyte form of 8-bit characters to unibyte. */
2301 if (ASCII_BYTE_P (*p
))
2303 else if (CHAR_BYTE8_HEAD_P (*p
))
2305 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2306 /* Delete all bytes for this 8-bit character but the
2307 last one, and change the last one to the character
2310 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2322 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2323 p
+= bytes
, pos
+= bytes
;
2327 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2332 ptrdiff_t pos
, stop
;
2333 unsigned char *p
, *pend
;
2335 /* Be sure not to have a multibyte sequence striding over the GAP.
2336 Ex: We change this: "...abc\302 _GAP_ \241def..."
2337 to: "...abc _GAP_ \302\241def..." */
2340 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2341 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2343 unsigned char *q
= GPT_ADDR
- 1;
2345 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2346 if (LEADING_CODE_P (*q
))
2348 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2350 move_gap_both (new_gpt
, new_gpt
);
2354 /* Make the buffer contents valid as multibyte by converting
2355 8-bit characters to multibyte form. */
2373 if (ASCII_BYTE_P (*p
))
2375 else if (EQ (flag
, Qt
)
2376 && ! CHAR_BYTE8_HEAD_P (*p
)
2377 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2378 p
+= bytes
, pos
+= bytes
;
2381 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2384 c
= BYTE8_TO_CHAR (*p
);
2385 bytes
= CHAR_STRING (c
, tmp
);
2387 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2389 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2390 /* Now the gap is after the just inserted data. */
2408 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2410 /* Do this first, so that chars_in_text asks the right question.
2411 set_intervals_multibyte needs it too. */
2412 BSET (current_buffer
, enable_multibyte_characters
, Qt
);
2414 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2415 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2417 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2419 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2420 if (BEGV_BYTE
> GPT_BYTE
)
2421 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2423 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2425 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2426 if (ZV_BYTE
> GPT_BYTE
)
2427 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2429 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2432 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2435 if (byte
> GPT_BYTE
)
2436 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2438 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2439 TEMP_SET_PT_BOTH (position
, byte
);
2442 tail
= markers
= BUF_MARKERS (current_buffer
);
2444 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2445 getting confused by the markers that have not yet been updated.
2446 It is also a signal that it should never create a marker. */
2447 BUF_MARKERS (current_buffer
) = NULL
;
2449 for (; tail
; tail
= tail
->next
)
2451 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2452 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2455 /* Make sure no markers were put on the chain
2456 while the chain value was incorrect. */
2457 if (BUF_MARKERS (current_buffer
))
2460 BUF_MARKERS (current_buffer
) = markers
;
2462 /* Do this last, so it can calculate the new correspondences
2463 between chars and bytes. */
2464 set_intervals_multibyte (1);
2467 if (!EQ (old_undo
, Qt
))
2469 /* Represent all the above changes by a special undo entry. */
2470 BSET (current_buffer
, undo_list
,
2471 Fcons (list3 (Qapply
,
2472 intern ("set-buffer-multibyte"),
2473 NILP (flag
) ? Qt
: Qnil
),
2479 /* Changing the multibyteness of a buffer means that all windows
2480 showing that buffer must be updated thoroughly. */
2481 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2482 ++windows_or_buffers_changed
;
2484 /* Copy this buffer's new multibyte status
2485 into all of its indirect buffers. */
2486 FOR_EACH_BUFFER (other
)
2487 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2489 BVAR (other
, enable_multibyte_characters
)
2490 = BVAR (current_buffer
, enable_multibyte_characters
);
2491 other
->prevent_redisplay_optimizations_p
= 1;
2494 /* Restore the modifiedness of the buffer. */
2495 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2496 Fset_buffer_modified_p (Qnil
);
2498 /* Update coding systems of this buffer's process (if any). */
2500 Lisp_Object process
;
2502 process
= Fget_buffer_process (Fcurrent_buffer ());
2503 if (PROCESSP (process
))
2504 setup_process_coding_systems (process
);
2510 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2511 Skill_all_local_variables
, 0, 0, 0,
2512 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2513 Most local variable bindings are eliminated so that the default values
2514 become effective once more. Also, the syntax table is set from
2515 `standard-syntax-table', the local keymap is set to nil,
2516 and the abbrev table from `fundamental-mode-abbrev-table'.
2517 This function also forces redisplay of the mode line.
2519 Every function to select a new major mode starts by
2520 calling this function.
2522 As a special exception, local variables whose names have
2523 a non-nil `permanent-local' property are not eliminated by this function.
2525 The first thing this function does is run
2526 the normal hook `change-major-mode-hook'. */)
2529 Frun_hooks (1, &Qchange_major_mode_hook
);
2531 /* Make sure none of the bindings in local_var_alist
2532 remain swapped in, in their symbols. */
2534 swap_out_buffer_local_variables (current_buffer
);
2536 /* Actually eliminate all local bindings of this buffer. */
2538 reset_buffer_local_variables (current_buffer
, 0);
2540 /* Force mode-line redisplay. Useful here because all major mode
2541 commands call this function. */
2542 update_mode_lines
++;
2547 /* Make sure no local variables remain set up with buffer B
2548 for their current values. */
2551 swap_out_buffer_local_variables (struct buffer
*b
)
2553 Lisp_Object oalist
, alist
, buffer
;
2555 XSETBUFFER (buffer
, b
);
2556 oalist
= BVAR (b
, local_var_alist
);
2558 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2560 Lisp_Object sym
= XCAR (XCAR (alist
));
2561 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2562 /* Need not do anything if some other buffer's binding is
2564 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2566 /* Symbol is set up for this buffer's old local value:
2568 swap_in_global_binding (XSYMBOL (sym
));
2573 /* Find all the overlays in the current buffer that contain position POS.
2574 Return the number found, and store them in a vector in *VEC_PTR.
2575 Store in *LEN_PTR the size allocated for the vector.
2576 Store in *NEXT_PTR the next position after POS where an overlay starts,
2577 or ZV if there are no more overlays between POS and ZV.
2578 Store in *PREV_PTR the previous position before POS where an overlay ends,
2579 or where an overlay starts which ends at or after POS;
2580 or BEGV if there are no such overlays from BEGV to POS.
2581 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2583 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2584 when this function is called.
2586 If EXTEND is non-zero, we make the vector bigger if necessary.
2587 If EXTEND is zero, we never extend the vector,
2588 and we store only as many overlays as will fit.
2589 But we still return the total number of overlays.
2591 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2592 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2593 default (BEGV or ZV). */
2596 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2598 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2600 Lisp_Object overlay
, start
, end
;
2601 struct Lisp_Overlay
*tail
;
2603 ptrdiff_t len
= *len_ptr
;
2604 Lisp_Object
*vec
= *vec_ptr
;
2605 ptrdiff_t next
= ZV
;
2606 ptrdiff_t prev
= BEGV
;
2607 int inhibit_storing
= 0;
2609 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2611 ptrdiff_t startpos
, endpos
;
2613 XSETMISC (overlay
, tail
);
2615 start
= OVERLAY_START (overlay
);
2616 end
= OVERLAY_END (overlay
);
2617 endpos
= OVERLAY_POSITION (end
);
2624 startpos
= OVERLAY_POSITION (start
);
2625 /* This one ends at or after POS
2626 so its start counts for PREV_PTR if it's before POS. */
2627 if (prev
< startpos
&& startpos
< pos
)
2631 if (startpos
<= pos
)
2635 /* The supplied vector is full.
2636 Either make it bigger, or don't store any more in it. */
2639 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2645 inhibit_storing
= 1;
2648 if (!inhibit_storing
)
2650 /* Keep counting overlays even if we can't return them all. */
2653 else if (startpos
< next
)
2657 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2659 ptrdiff_t startpos
, endpos
;
2661 XSETMISC (overlay
, tail
);
2663 start
= OVERLAY_START (overlay
);
2664 end
= OVERLAY_END (overlay
);
2665 startpos
= OVERLAY_POSITION (start
);
2668 if (startpos
< next
)
2672 endpos
= OVERLAY_POSITION (end
);
2679 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2685 inhibit_storing
= 1;
2688 if (!inhibit_storing
)
2692 if (startpos
< pos
&& startpos
> prev
)
2695 else if (endpos
< pos
&& endpos
> prev
)
2697 else if (endpos
== pos
&& startpos
> prev
2698 && (!change_req
|| startpos
< pos
))
2709 /* Find all the overlays in the current buffer that overlap the range
2710 BEG-END, or are empty at BEG, or are empty at END provided END
2711 denotes the position at the end of the current buffer.
2713 Return the number found, and store them in a vector in *VEC_PTR.
2714 Store in *LEN_PTR the size allocated for the vector.
2715 Store in *NEXT_PTR the next position after POS where an overlay starts,
2716 or ZV if there are no more overlays.
2717 Store in *PREV_PTR the previous position before POS where an overlay ends,
2718 or BEGV if there are no previous overlays.
2719 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2721 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2722 when this function is called.
2724 If EXTEND is non-zero, we make the vector bigger if necessary.
2725 If EXTEND is zero, we never extend the vector,
2726 and we store only as many overlays as will fit.
2727 But we still return the total number of overlays. */
2730 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2731 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2732 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2734 Lisp_Object overlay
, ostart
, oend
;
2735 struct Lisp_Overlay
*tail
;
2737 ptrdiff_t len
= *len_ptr
;
2738 Lisp_Object
*vec
= *vec_ptr
;
2739 ptrdiff_t next
= ZV
;
2740 ptrdiff_t prev
= BEGV
;
2741 int inhibit_storing
= 0;
2742 int end_is_Z
= end
== Z
;
2744 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2746 ptrdiff_t startpos
, endpos
;
2748 XSETMISC (overlay
, tail
);
2750 ostart
= OVERLAY_START (overlay
);
2751 oend
= OVERLAY_END (overlay
);
2752 endpos
= OVERLAY_POSITION (oend
);
2759 startpos
= OVERLAY_POSITION (ostart
);
2760 /* Count an interval if it overlaps the range, is empty at the
2761 start of the range, or is empty at END provided END denotes the
2762 end of the buffer. */
2763 if ((beg
< endpos
&& startpos
< end
)
2764 || (startpos
== endpos
2765 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2769 /* The supplied vector is full.
2770 Either make it bigger, or don't store any more in it. */
2773 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2779 inhibit_storing
= 1;
2782 if (!inhibit_storing
)
2784 /* Keep counting overlays even if we can't return them all. */
2787 else if (startpos
< next
)
2791 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2793 ptrdiff_t startpos
, endpos
;
2795 XSETMISC (overlay
, tail
);
2797 ostart
= OVERLAY_START (overlay
);
2798 oend
= OVERLAY_END (overlay
);
2799 startpos
= OVERLAY_POSITION (ostart
);
2802 if (startpos
< next
)
2806 endpos
= OVERLAY_POSITION (oend
);
2807 /* Count an interval if it overlaps the range, is empty at the
2808 start of the range, or is empty at END provided END denotes the
2809 end of the buffer. */
2810 if ((beg
< endpos
&& startpos
< end
)
2811 || (startpos
== endpos
2812 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2818 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2824 inhibit_storing
= 1;
2827 if (!inhibit_storing
)
2831 else if (endpos
< beg
&& endpos
> prev
)
2843 /* Return non-zero if there exists an overlay with a non-nil
2844 `mouse-face' property overlapping OVERLAY. */
2847 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2849 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2850 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2851 ptrdiff_t n
, i
, size
;
2852 Lisp_Object
*v
, tem
;
2855 v
= alloca (size
* sizeof *v
);
2856 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2859 v
= alloca (n
* sizeof *v
);
2860 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2863 for (i
= 0; i
< n
; ++i
)
2864 if (!EQ (v
[i
], overlay
)
2865 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2874 /* Fast function to just test if we're at an overlay boundary. */
2876 overlay_touches_p (ptrdiff_t pos
)
2878 Lisp_Object overlay
;
2879 struct Lisp_Overlay
*tail
;
2881 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2885 XSETMISC (overlay
,tail
);
2886 eassert (OVERLAYP (overlay
));
2888 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2891 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2895 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2899 XSETMISC (overlay
, tail
);
2900 eassert (OVERLAYP (overlay
));
2902 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2905 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2913 Lisp_Object overlay
;
2919 compare_overlays (const void *v1
, const void *v2
)
2921 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2922 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2923 if (s1
->priority
!= s2
->priority
)
2924 return s1
->priority
< s2
->priority
? -1 : 1;
2925 if (s1
->beg
!= s2
->beg
)
2926 return s1
->beg
< s2
->beg
? -1 : 1;
2927 if (s1
->end
!= s2
->end
)
2928 return s2
->end
< s1
->end
? -1 : 1;
2929 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2930 between "equal" overlays. The result can still change between
2931 invocations of Emacs, but it won't change in the middle of
2932 `find_field' (bug#6830). */
2933 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2934 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2938 /* Sort an array of overlays by priority. The array is modified in place.
2939 The return value is the new size; this may be smaller than the original
2940 size if some of the overlays were invalid or were window-specific. */
2942 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2945 struct sortvec
*sortvec
= alloca (noverlays
* sizeof *sortvec
);
2947 /* Put the valid and relevant overlays into sortvec. */
2949 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2952 Lisp_Object overlay
;
2954 overlay
= overlay_vec
[i
];
2955 if (OVERLAYP (overlay
)
2956 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2957 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2959 /* If we're interested in a specific window, then ignore
2960 overlays that are limited to some other window. */
2965 window
= Foverlay_get (overlay
, Qwindow
);
2966 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2970 /* This overlay is good and counts: put it into sortvec. */
2971 sortvec
[j
].overlay
= overlay
;
2972 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2973 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2974 tem
= Foverlay_get (overlay
, Qpriority
);
2976 sortvec
[j
].priority
= XINT (tem
);
2978 sortvec
[j
].priority
= 0;
2984 /* Sort the overlays into the proper order: increasing priority. */
2987 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2989 for (i
= 0; i
< noverlays
; i
++)
2990 overlay_vec
[i
] = sortvec
[i
].overlay
;
2996 Lisp_Object string
, string2
;
3003 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
3004 ptrdiff_t size
; /* Allocated length of that array. */
3005 ptrdiff_t used
; /* How much of the array is currently in use. */
3006 ptrdiff_t bytes
; /* Total length of the strings in buf. */
3009 /* Buffers for storing information about the overlays touching a given
3010 position. These could be automatic variables in overlay_strings, but
3011 it's more efficient to hold onto the memory instead of repeatedly
3012 allocating and freeing it. */
3013 static struct sortstrlist overlay_heads
, overlay_tails
;
3014 static unsigned char *overlay_str_buf
;
3016 /* Allocated length of overlay_str_buf. */
3017 static ptrdiff_t overlay_str_len
;
3019 /* A comparison function suitable for passing to qsort. */
3021 cmp_for_strings (const void *as1
, const void *as2
)
3023 struct sortstr
*s1
= (struct sortstr
*)as1
;
3024 struct sortstr
*s2
= (struct sortstr
*)as2
;
3025 if (s1
->size
!= s2
->size
)
3026 return s2
->size
< s1
->size
? -1 : 1;
3027 if (s1
->priority
!= s2
->priority
)
3028 return s1
->priority
< s2
->priority
? -1 : 1;
3033 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
3034 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
3038 if (ssl
->used
== ssl
->size
)
3039 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
3040 ssl
->buf
[ssl
->used
].string
= str
;
3041 ssl
->buf
[ssl
->used
].string2
= str2
;
3042 ssl
->buf
[ssl
->used
].size
= size
;
3043 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
3046 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3047 nbytes
= SCHARS (str
);
3048 else if (! STRING_MULTIBYTE (str
))
3049 nbytes
= count_size_as_multibyte (SDATA (str
),
3052 nbytes
= SBYTES (str
);
3054 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3055 memory_full (SIZE_MAX
);
3056 ssl
->bytes
+= nbytes
;
3060 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3061 nbytes
= SCHARS (str2
);
3062 else if (! STRING_MULTIBYTE (str2
))
3063 nbytes
= count_size_as_multibyte (SDATA (str2
),
3066 nbytes
= SBYTES (str2
);
3068 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3069 memory_full (SIZE_MAX
);
3070 ssl
->bytes
+= nbytes
;
3074 /* Return the concatenation of the strings associated with overlays that
3075 begin or end at POS, ignoring overlays that are specific to a window
3076 other than W. The strings are concatenated in the appropriate order:
3077 shorter overlays nest inside longer ones, and higher priority inside
3078 lower. Normally all of the after-strings come first, but zero-sized
3079 overlays have their after-strings ride along with the before-strings
3080 because it would look strange to print them inside-out.
3082 Returns the string length, and stores the contents indirectly through
3083 PSTR, if that variable is non-null. The string may be overwritten by
3084 subsequent calls. */
3087 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3089 Lisp_Object overlay
, window
, str
;
3090 struct Lisp_Overlay
*ov
;
3091 ptrdiff_t startpos
, endpos
;
3092 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3094 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3095 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3096 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3098 XSETMISC (overlay
, ov
);
3099 eassert (OVERLAYP (overlay
));
3101 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3102 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3105 if (endpos
!= pos
&& startpos
!= pos
)
3107 window
= Foverlay_get (overlay
, Qwindow
);
3108 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3111 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3112 record_overlay_string (&overlay_heads
, str
,
3114 ? Foverlay_get (overlay
, Qafter_string
)
3116 Foverlay_get (overlay
, Qpriority
),
3118 else if (endpos
== pos
3119 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3120 record_overlay_string (&overlay_tails
, str
, Qnil
,
3121 Foverlay_get (overlay
, Qpriority
),
3124 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3126 XSETMISC (overlay
, ov
);
3127 eassert (OVERLAYP (overlay
));
3129 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3130 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3133 if (endpos
!= pos
&& startpos
!= pos
)
3135 window
= Foverlay_get (overlay
, Qwindow
);
3136 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3139 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3140 record_overlay_string (&overlay_heads
, str
,
3142 ? Foverlay_get (overlay
, Qafter_string
)
3144 Foverlay_get (overlay
, Qpriority
),
3146 else if (endpos
== pos
3147 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3148 record_overlay_string (&overlay_tails
, str
, Qnil
,
3149 Foverlay_get (overlay
, Qpriority
),
3152 if (overlay_tails
.used
> 1)
3153 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3155 if (overlay_heads
.used
> 1)
3156 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3158 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3165 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3166 memory_full (SIZE_MAX
);
3167 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3168 if (total
> overlay_str_len
)
3169 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3170 total
- overlay_str_len
, -1, 1);
3172 p
= overlay_str_buf
;
3173 for (i
= overlay_tails
.used
; --i
>= 0;)
3176 tem
= overlay_tails
.buf
[i
].string
;
3177 nbytes
= copy_text (SDATA (tem
), p
,
3179 STRING_MULTIBYTE (tem
), multibyte
);
3182 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3185 tem
= overlay_heads
.buf
[i
].string
;
3186 nbytes
= copy_text (SDATA (tem
), p
,
3188 STRING_MULTIBYTE (tem
), multibyte
);
3190 tem
= overlay_heads
.buf
[i
].string2
;
3193 nbytes
= copy_text (SDATA (tem
), p
,
3195 STRING_MULTIBYTE (tem
), multibyte
);
3199 if (p
!= overlay_str_buf
+ total
)
3202 *pstr
= overlay_str_buf
;
3208 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3211 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3213 Lisp_Object overlay
, beg
, end
;
3214 struct Lisp_Overlay
*prev
, *tail
, *next
;
3216 /* See if anything in overlays_before should move to overlays_after. */
3218 /* We don't strictly need prev in this loop; it should always be nil.
3219 But we use it for symmetry and in case that should cease to be true
3220 with some future change. */
3222 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3225 XSETMISC (overlay
, tail
);
3226 eassert (OVERLAYP (overlay
));
3228 beg
= OVERLAY_START (overlay
);
3229 end
= OVERLAY_END (overlay
);
3231 if (OVERLAY_POSITION (end
) > pos
)
3233 /* OVERLAY needs to be moved. */
3234 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3235 struct Lisp_Overlay
*other
, *other_prev
;
3237 /* Splice the cons cell TAIL out of overlays_before. */
3241 buffer_set_overlays_before (buf
, next
);
3243 /* Search thru overlays_after for where to put it. */
3245 for (other
= buf
->overlays_after
; other
;
3246 other_prev
= other
, other
= other
->next
)
3248 Lisp_Object otherbeg
, otheroverlay
;
3250 XSETMISC (otheroverlay
, other
);
3251 eassert (OVERLAYP (otheroverlay
));
3253 otherbeg
= OVERLAY_START (otheroverlay
);
3254 if (OVERLAY_POSITION (otherbeg
) >= where
)
3258 /* Add TAIL to overlays_after before OTHER. */
3261 other_prev
->next
= tail
;
3263 buffer_set_overlays_after (buf
, tail
);
3267 /* We've reached the things that should stay in overlays_before.
3268 All the rest of overlays_before must end even earlier,
3273 /* See if anything in overlays_after should be in overlays_before. */
3275 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3278 XSETMISC (overlay
, tail
);
3279 eassert (OVERLAYP (overlay
));
3281 beg
= OVERLAY_START (overlay
);
3282 end
= OVERLAY_END (overlay
);
3284 /* Stop looking, when we know that nothing further
3285 can possibly end before POS. */
3286 if (OVERLAY_POSITION (beg
) > pos
)
3289 if (OVERLAY_POSITION (end
) <= pos
)
3291 /* OVERLAY needs to be moved. */
3292 ptrdiff_t where
= OVERLAY_POSITION (end
);
3293 struct Lisp_Overlay
*other
, *other_prev
;
3295 /* Splice the cons cell TAIL out of overlays_after. */
3299 buffer_set_overlays_after (buf
, next
);
3301 /* Search thru overlays_before for where to put it. */
3303 for (other
= buf
->overlays_before
; other
;
3304 other_prev
= other
, other
= other
->next
)
3306 Lisp_Object otherend
, otheroverlay
;
3308 XSETMISC (otheroverlay
, other
);
3309 eassert (OVERLAYP (otheroverlay
));
3311 otherend
= OVERLAY_END (otheroverlay
);
3312 if (OVERLAY_POSITION (otherend
) <= where
)
3316 /* Add TAIL to overlays_before before OTHER. */
3319 other_prev
->next
= tail
;
3321 buffer_set_overlays_before (buf
, tail
);
3326 buf
->overlay_center
= pos
;
3330 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3332 /* After an insertion, the lists are still sorted properly,
3333 but we may need to update the value of the overlay center. */
3334 if (current_buffer
->overlay_center
>= pos
)
3335 current_buffer
->overlay_center
+= length
;
3339 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3341 if (current_buffer
->overlay_center
< pos
)
3342 /* The deletion was to our right. No change needed; the before- and
3343 after-lists are still consistent. */
3345 else if (current_buffer
->overlay_center
- pos
> length
)
3346 /* The deletion was to our left. We need to adjust the center value
3347 to account for the change in position, but the lists are consistent
3348 given the new value. */
3349 current_buffer
->overlay_center
-= length
;
3351 /* We're right in the middle. There might be things on the after-list
3352 that now belong on the before-list. Recentering will move them,
3353 and also update the center point. */
3354 recenter_overlay_lists (current_buffer
, pos
);
3357 /* Fix up overlays that were garbled as a result of permuting markers
3358 in the range START through END. Any overlay with at least one
3359 endpoint in this range will need to be unlinked from the overlay
3360 list and reinserted in its proper place.
3361 Such an overlay might even have negative size at this point.
3362 If so, we'll make the overlay empty. */
3364 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3366 Lisp_Object overlay
;
3367 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3368 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3369 /* These are either nil, indicating that before_list or after_list
3370 should be assigned, or the cons cell the cdr of which should be
3372 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3373 /* 'Parent', likewise, indicates a cons cell or
3374 current_buffer->overlays_before or overlays_after, depending
3375 which loop we're in. */
3376 struct Lisp_Overlay
*tail
, *parent
;
3377 ptrdiff_t startpos
, endpos
;
3379 /* This algorithm shifts links around instead of consing and GCing.
3380 The loop invariant is that before_list (resp. after_list) is a
3381 well-formed list except that its last element, the CDR of beforep
3382 (resp. afterp) if beforep (afterp) isn't nil or before_list
3383 (after_list) if it is, is still uninitialized. So it's not a bug
3384 that before_list isn't initialized, although it may look
3386 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3388 XSETMISC (overlay
, tail
);
3390 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3391 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3393 /* If the overlay is backwards, make it empty. */
3394 if (endpos
< startpos
)
3397 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3405 || (startpos
>= start
&& startpos
< end
))
3407 /* Add it to the end of the wrong list. Later on,
3408 recenter_overlay_lists will move it to the right place. */
3409 if (endpos
< current_buffer
->overlay_center
)
3414 afterp
->next
= tail
;
3422 beforep
->next
= tail
;
3426 buffer_set_overlays_before (current_buffer
, tail
->next
);
3428 parent
->next
= tail
->next
;
3432 parent
= tail
, tail
= parent
->next
;
3434 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3436 XSETMISC (overlay
, tail
);
3438 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3439 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3441 /* If the overlay is backwards, make it empty. */
3442 if (endpos
< startpos
)
3445 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3449 if (startpos
>= end
)
3452 if (startpos
>= start
3453 || (endpos
>= start
&& endpos
< end
))
3455 if (endpos
< current_buffer
->overlay_center
)
3460 afterp
->next
= tail
;
3468 beforep
->next
= tail
;
3472 buffer_set_overlays_after (current_buffer
, tail
->next
);
3474 parent
->next
= tail
->next
;
3478 parent
= tail
, tail
= parent
->next
;
3481 /* Splice the constructed (wrong) lists into the buffer's lists,
3482 and let the recenter function make it sane again. */
3485 beforep
->next
= current_buffer
->overlays_before
;
3486 buffer_set_overlays_before (current_buffer
, before_list
);
3488 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3492 afterp
->next
= current_buffer
->overlays_after
;
3493 buffer_set_overlays_after (current_buffer
, after_list
);
3495 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3498 /* We have two types of overlay: the one whose ending marker is
3499 after-insertion-marker (this is the usual case) and the one whose
3500 ending marker is before-insertion-marker. When `overlays_before'
3501 contains overlays of the latter type and the former type in this
3502 order and both overlays end at inserting position, inserting a text
3503 increases only the ending marker of the latter type, which results
3504 in incorrect ordering of `overlays_before'.
3506 This function fixes ordering of overlays in the slot
3507 `overlays_before' of the buffer *BP. Before the insertion, `point'
3508 was at PREV, and now is at POS. */
3511 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3513 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3514 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3516 ptrdiff_t end
IF_LINT (= 0);
3518 /* After the insertion, the several overlays may be in incorrect
3519 order. The possibility is that, in the list `overlays_before',
3520 an overlay which ends at POS appears after an overlay which ends
3521 at PREV. Since POS is greater than PREV, we must fix the
3522 ordering of these overlays, by moving overlays ends at POS before
3523 the overlays ends at PREV. */
3525 /* At first, find a place where disordered overlays should be linked
3526 in. It is where an overlay which end before POS exists. (i.e. an
3527 overlay whose ending marker is after-insertion-marker if disorder
3530 && (XSETMISC (tem
, tail
),
3531 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3537 /* If we don't find such an overlay,
3538 or the found one ends before PREV,
3539 or the found one is the last one in the list,
3540 we don't have to fix anything. */
3541 if (!tail
|| end
< prev
|| !tail
->next
)
3544 right_pair
= parent
;
3548 /* Now, end position of overlays in the list TAIL should be before
3549 or equal to PREV. In the loop, an overlay which ends at POS is
3550 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3551 we found an overlay which ends before PREV, the remaining
3552 overlays are in correct order. */
3555 XSETMISC (tem
, tail
);
3556 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3559 { /* This overlay is disordered. */
3560 struct Lisp_Overlay
*found
= tail
;
3562 /* Unlink the found overlay. */
3564 parent
->next
= tail
;
3565 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3566 and link it into the right place. */
3569 found
->next
= bp
->overlays_before
;
3570 buffer_set_overlays_before (bp
, found
);
3574 found
->next
= right_pair
->next
;
3575 right_pair
->next
= found
;
3578 else if (end
== prev
)
3583 else /* No more disordered overlay. */
3588 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3589 doc
: /* Return t if OBJECT is an overlay. */)
3590 (Lisp_Object object
)
3592 return (OVERLAYP (object
) ? Qt
: Qnil
);
3595 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3596 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3597 If omitted, BUFFER defaults to the current buffer.
3598 BEG and END may be integers or markers.
3599 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3600 for the front of the overlay advance when text is inserted there
3601 \(which means the text *is not* included in the overlay).
3602 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3603 for the rear of the overlay advance when text is inserted there
3604 \(which means the text *is* included in the overlay). */)
3605 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3607 Lisp_Object overlay
;
3611 XSETBUFFER (buffer
, current_buffer
);
3613 CHECK_BUFFER (buffer
);
3615 && ! EQ (Fmarker_buffer (beg
), buffer
))
3616 error ("Marker points into wrong buffer");
3618 && ! EQ (Fmarker_buffer (end
), buffer
))
3619 error ("Marker points into wrong buffer");
3621 CHECK_NUMBER_COERCE_MARKER (beg
);
3622 CHECK_NUMBER_COERCE_MARKER (end
);
3624 if (XINT (beg
) > XINT (end
))
3627 temp
= beg
; beg
= end
; end
= temp
;
3630 b
= XBUFFER (buffer
);
3632 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3633 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3635 if (!NILP (front_advance
))
3636 XMARKER (beg
)->insertion_type
= 1;
3637 if (!NILP (rear_advance
))
3638 XMARKER (end
)->insertion_type
= 1;
3640 overlay
= build_overlay (beg
, end
, Qnil
);
3642 /* Put the new overlay on the wrong list. */
3643 end
= OVERLAY_END (overlay
);
3644 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3646 if (b
->overlays_after
)
3647 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3648 buffer_set_overlays_after (b
, XOVERLAY (overlay
));
3652 if (b
->overlays_before
)
3653 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3654 buffer_set_overlays_before (b
, XOVERLAY (overlay
));
3657 /* This puts it in the right list, and in the right order. */
3658 recenter_overlay_lists (b
, b
->overlay_center
);
3660 /* We don't need to redisplay the region covered by the overlay, because
3661 the overlay has no properties at the moment. */
3666 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3669 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3673 ptrdiff_t temp
= start
;
3678 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3680 /* If this is a buffer not in the selected window,
3681 we must do other windows. */
3682 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3683 windows_or_buffers_changed
= 1;
3684 /* If multiple windows show this buffer, we must do other windows. */
3685 else if (buffer_shared
> 1)
3686 windows_or_buffers_changed
= 1;
3687 /* If we modify an overlay at the end of the buffer, we cannot
3688 be sure that window end is still valid. */
3689 else if (end
>= ZV
&& start
<= ZV
)
3690 windows_or_buffers_changed
= 1;
3692 ++BUF_OVERLAY_MODIFF (buf
);
3695 /* Remove OVERLAY from LIST. */
3697 static struct Lisp_Overlay
*
3698 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3700 register struct Lisp_Overlay
*tail
, **prev
= &list
;
3702 for (tail
= list
; tail
; prev
= &tail
->next
, tail
= *prev
)
3703 if (tail
== overlay
)
3705 *prev
= overlay
->next
;
3706 overlay
->next
= NULL
;
3712 /* Remove OVERLAY from both overlay lists of B. */
3715 unchain_both (struct buffer
*b
, Lisp_Object overlay
)
3717 struct Lisp_Overlay
*ov
= XOVERLAY (overlay
);
3719 buffer_set_overlays_before (b
, unchain_overlay (b
->overlays_before
, ov
));
3720 buffer_set_overlays_after (b
, unchain_overlay (b
->overlays_after
, ov
));
3721 eassert (XOVERLAY (overlay
)->next
== NULL
);
3724 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3725 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3726 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3727 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3729 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3731 struct buffer
*b
, *ob
= 0;
3732 Lisp_Object obuffer
;
3733 ptrdiff_t count
= SPECPDL_INDEX ();
3734 ptrdiff_t n_beg
, n_end
, o_beg
IF_LINT (= 0), o_end
IF_LINT (= 0);
3736 CHECK_OVERLAY (overlay
);
3738 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3740 XSETBUFFER (buffer
, current_buffer
);
3741 CHECK_BUFFER (buffer
);
3743 if (NILP (Fbuffer_live_p (buffer
)))
3744 error ("Attempt to move overlay to a dead buffer");
3747 && ! EQ (Fmarker_buffer (beg
), buffer
))
3748 error ("Marker points into wrong buffer");
3750 && ! EQ (Fmarker_buffer (end
), buffer
))
3751 error ("Marker points into wrong buffer");
3753 CHECK_NUMBER_COERCE_MARKER (beg
);
3754 CHECK_NUMBER_COERCE_MARKER (end
);
3756 if (XINT (beg
) > XINT (end
))
3759 temp
= beg
; beg
= end
; end
= temp
;
3762 specbind (Qinhibit_quit
, Qt
);
3764 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3765 b
= XBUFFER (buffer
);
3767 if (!NILP (obuffer
))
3769 ob
= XBUFFER (obuffer
);
3771 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3772 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3774 unchain_both (ob
, overlay
);
3777 /* Set the overlay boundaries, which may clip them. */
3778 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3779 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3781 n_beg
= marker_position (OVERLAY_START (overlay
));
3782 n_end
= marker_position (OVERLAY_END (overlay
));
3784 /* If the overlay has changed buffers, do a thorough redisplay. */
3785 if (!EQ (buffer
, obuffer
))
3787 /* Redisplay where the overlay was. */
3789 modify_overlay (ob
, o_beg
, o_end
);
3791 /* Redisplay where the overlay is going to be. */
3792 modify_overlay (b
, n_beg
, n_end
);
3795 /* Redisplay the area the overlay has just left, or just enclosed. */
3798 modify_overlay (b
, o_end
, n_end
);
3799 else if (o_end
== n_end
)
3800 modify_overlay (b
, o_beg
, n_beg
);
3802 modify_overlay (b
, min (o_beg
, n_beg
), max (o_end
, n_end
));
3805 /* Delete the overlay if it is empty after clipping and has the
3806 evaporate property. */
3807 if (n_beg
== n_end
&& !NILP (Foverlay_get (overlay
, Qevaporate
)))
3808 return unbind_to (count
, Fdelete_overlay (overlay
));
3810 /* Put the overlay into the new buffer's overlay lists, first on the
3812 if (n_end
< b
->overlay_center
)
3814 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3815 buffer_set_overlays_after (b
, XOVERLAY (overlay
));
3819 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3820 buffer_set_overlays_before (b
, XOVERLAY (overlay
));
3823 /* This puts it in the right list, and in the right order. */
3824 recenter_overlay_lists (b
, b
->overlay_center
);
3826 return unbind_to (count
, overlay
);
3829 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3830 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3831 (Lisp_Object overlay
)
3835 ptrdiff_t count
= SPECPDL_INDEX ();
3837 CHECK_OVERLAY (overlay
);
3839 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3843 b
= XBUFFER (buffer
);
3844 specbind (Qinhibit_quit
, Qt
);
3846 unchain_both (b
, overlay
);
3847 drop_overlay (b
, XOVERLAY (overlay
));
3849 /* When deleting an overlay with before or after strings, turn off
3850 display optimizations for the affected buffer, on the basis that
3851 these strings may contain newlines. This is easier to do than to
3852 check for that situation during redisplay. */
3853 if (!windows_or_buffers_changed
3854 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3855 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3856 b
->prevent_redisplay_optimizations_p
= 1;
3858 return unbind_to (count
, Qnil
);
3861 /* Overlay dissection functions. */
3863 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3864 doc
: /* Return the position at which OVERLAY starts. */)
3865 (Lisp_Object overlay
)
3867 CHECK_OVERLAY (overlay
);
3869 return (Fmarker_position (OVERLAY_START (overlay
)));
3872 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3873 doc
: /* Return the position at which OVERLAY ends. */)
3874 (Lisp_Object overlay
)
3876 CHECK_OVERLAY (overlay
);
3878 return (Fmarker_position (OVERLAY_END (overlay
)));
3881 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3882 doc
: /* Return the buffer OVERLAY belongs to.
3883 Return nil if OVERLAY has been deleted. */)
3884 (Lisp_Object overlay
)
3886 CHECK_OVERLAY (overlay
);
3888 return Fmarker_buffer (OVERLAY_START (overlay
));
3891 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3892 doc
: /* Return a list of the properties on OVERLAY.
3893 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3895 (Lisp_Object overlay
)
3897 CHECK_OVERLAY (overlay
);
3899 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3903 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3904 doc
: /* Return a list of the overlays that contain the character at POS. */)
3907 ptrdiff_t len
, noverlays
;
3908 Lisp_Object
*overlay_vec
;
3911 CHECK_NUMBER_COERCE_MARKER (pos
);
3914 /* We can't use alloca here because overlays_at can call xrealloc. */
3915 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3917 /* Put all the overlays we want in a vector in overlay_vec.
3918 Store the length in len. */
3919 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3922 /* Make a list of them all. */
3923 result
= Flist (noverlays
, overlay_vec
);
3925 xfree (overlay_vec
);
3929 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3930 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3931 Overlap means that at least one character is contained within the overlay
3932 and also contained within the specified region.
3933 Empty overlays are included in the result if they are located at BEG,
3934 between BEG and END, or at END provided END denotes the position at the
3935 end of the buffer. */)
3936 (Lisp_Object beg
, Lisp_Object end
)
3938 ptrdiff_t len
, noverlays
;
3939 Lisp_Object
*overlay_vec
;
3942 CHECK_NUMBER_COERCE_MARKER (beg
);
3943 CHECK_NUMBER_COERCE_MARKER (end
);
3946 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3948 /* Put all the overlays we want in a vector in overlay_vec.
3949 Store the length in len. */
3950 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3953 /* Make a list of them all. */
3954 result
= Flist (noverlays
, overlay_vec
);
3956 xfree (overlay_vec
);
3960 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3962 doc
: /* Return the next position after POS where an overlay starts or ends.
3963 If there are no overlay boundaries from POS to (point-max),
3964 the value is (point-max). */)
3967 ptrdiff_t i
, len
, noverlays
;
3969 Lisp_Object
*overlay_vec
;
3971 CHECK_NUMBER_COERCE_MARKER (pos
);
3974 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3976 /* Put all the overlays we want in a vector in overlay_vec.
3977 Store the length in len.
3978 endpos gets the position where the next overlay starts. */
3979 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3982 /* If any of these overlays ends before endpos,
3983 use its ending point instead. */
3984 for (i
= 0; i
< noverlays
; i
++)
3989 oend
= OVERLAY_END (overlay_vec
[i
]);
3990 oendpos
= OVERLAY_POSITION (oend
);
3991 if (oendpos
< endpos
)
3995 xfree (overlay_vec
);
3996 return make_number (endpos
);
3999 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4000 Sprevious_overlay_change
, 1, 1, 0,
4001 doc
: /* Return the previous position before POS where an overlay starts or ends.
4002 If there are no overlay boundaries from (point-min) to POS,
4003 the value is (point-min). */)
4007 Lisp_Object
*overlay_vec
;
4010 CHECK_NUMBER_COERCE_MARKER (pos
);
4012 /* At beginning of buffer, we know the answer;
4013 avoid bug subtracting 1 below. */
4014 if (XINT (pos
) == BEGV
)
4018 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
4020 /* Put all the overlays we want in a vector in overlay_vec.
4021 Store the length in len.
4022 prevpos gets the position of the previous change. */
4023 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4026 xfree (overlay_vec
);
4027 return make_number (prevpos
);
4030 /* These functions are for debugging overlays. */
4032 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4033 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4034 The car has all the overlays before the overlay center;
4035 the cdr has all the overlays after the overlay center.
4036 Recentering overlays moves overlays between these lists.
4037 The lists you get are copies, so that changing them has no effect.
4038 However, the overlays you get are the real objects that the buffer uses. */)
4041 struct Lisp_Overlay
*ol
;
4042 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4044 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4047 before
= Fcons (tmp
, before
);
4049 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4052 after
= Fcons (tmp
, after
);
4055 return Fcons (Fnreverse (before
), Fnreverse (after
));
4058 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4059 doc
: /* Recenter the overlays of the current buffer around position POS.
4060 That makes overlay lookup faster for positions near POS (but perhaps slower
4061 for positions far away from POS). */)
4065 CHECK_NUMBER_COERCE_MARKER (pos
);
4067 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4068 recenter_overlay_lists (current_buffer
, p
);
4072 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4073 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4074 (Lisp_Object overlay
, Lisp_Object prop
)
4076 CHECK_OVERLAY (overlay
);
4077 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4080 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4081 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4082 VALUE will be returned.*/)
4083 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4085 Lisp_Object tail
, buffer
;
4088 CHECK_OVERLAY (overlay
);
4090 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4092 for (tail
= XOVERLAY (overlay
)->plist
;
4093 CONSP (tail
) && CONSP (XCDR (tail
));
4094 tail
= XCDR (XCDR (tail
)))
4095 if (EQ (XCAR (tail
), prop
))
4097 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4098 XSETCAR (XCDR (tail
), value
);
4101 /* It wasn't in the list, so add it to the front. */
4102 changed
= !NILP (value
);
4104 (overlay
, Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
)));
4106 if (! NILP (buffer
))
4109 modify_overlay (XBUFFER (buffer
),
4110 marker_position (OVERLAY_START (overlay
)),
4111 marker_position (OVERLAY_END (overlay
)));
4112 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4113 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4114 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4115 Fdelete_overlay (overlay
);
4121 /* Subroutine of report_overlay_modification. */
4123 /* Lisp vector holding overlay hook functions to call.
4124 Vector elements come in pairs.
4125 Each even-index element is a list of hook functions.
4126 The following odd-index element is the overlay they came from.
4128 Before the buffer change, we fill in this vector
4129 as we call overlay hook functions.
4130 After the buffer change, we get the functions to call from this vector.
4131 This way we always call the same functions before and after the change. */
4132 static Lisp_Object last_overlay_modification_hooks
;
4134 /* Number of elements actually used in last_overlay_modification_hooks. */
4135 static ptrdiff_t last_overlay_modification_hooks_used
;
4137 /* Add one functionlist/overlay pair
4138 to the end of last_overlay_modification_hooks. */
4141 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4143 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4145 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4146 last_overlay_modification_hooks
=
4147 larger_vector (last_overlay_modification_hooks
, 2, -1);
4148 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4149 functionlist
); last_overlay_modification_hooks_used
++;
4150 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4151 overlay
); last_overlay_modification_hooks_used
++;
4154 /* Run the modification-hooks of overlays that include
4155 any part of the text in START to END.
4156 If this change is an insertion, also
4157 run the insert-before-hooks of overlay starting at END,
4158 and the insert-after-hooks of overlay ending at START.
4160 This is called both before and after the modification.
4161 AFTER is nonzero when we call after the modification.
4163 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4164 When AFTER is nonzero, they are the start position,
4165 the position after the inserted new text,
4166 and the length of deleted or replaced old text. */
4169 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4170 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4172 Lisp_Object prop
, overlay
;
4173 struct Lisp_Overlay
*tail
;
4174 /* 1 if this change is an insertion. */
4175 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4176 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4181 /* We used to run the functions as soon as we found them and only register
4182 them in last_overlay_modification_hooks for the purpose of the `after'
4183 case. But running elisp code as we traverse the list of overlays is
4184 painful because the list can be modified by the elisp code so we had to
4185 copy at several places. We now simply do a read-only traversal that
4186 only collects the functions to run and we run them afterwards. It's
4187 simpler, especially since all the code was already there. -stef */
4191 /* We are being called before a change.
4192 Scan the overlays to find the functions to call. */
4193 last_overlay_modification_hooks_used
= 0;
4194 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4196 ptrdiff_t startpos
, endpos
;
4197 Lisp_Object ostart
, oend
;
4199 XSETMISC (overlay
, tail
);
4201 ostart
= OVERLAY_START (overlay
);
4202 oend
= OVERLAY_END (overlay
);
4203 endpos
= OVERLAY_POSITION (oend
);
4204 if (XFASTINT (start
) > endpos
)
4206 startpos
= OVERLAY_POSITION (ostart
);
4207 if (insertion
&& (XFASTINT (start
) == startpos
4208 || XFASTINT (end
) == startpos
))
4210 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4212 add_overlay_mod_hooklist (prop
, overlay
);
4214 if (insertion
&& (XFASTINT (start
) == endpos
4215 || XFASTINT (end
) == endpos
))
4217 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4219 add_overlay_mod_hooklist (prop
, overlay
);
4221 /* Test for intersecting intervals. This does the right thing
4222 for both insertion and deletion. */
4223 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4225 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4227 add_overlay_mod_hooklist (prop
, overlay
);
4231 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4233 ptrdiff_t startpos
, endpos
;
4234 Lisp_Object ostart
, oend
;
4236 XSETMISC (overlay
, tail
);
4238 ostart
= OVERLAY_START (overlay
);
4239 oend
= OVERLAY_END (overlay
);
4240 startpos
= OVERLAY_POSITION (ostart
);
4241 endpos
= OVERLAY_POSITION (oend
);
4242 if (XFASTINT (end
) < startpos
)
4244 if (insertion
&& (XFASTINT (start
) == startpos
4245 || XFASTINT (end
) == startpos
))
4247 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4249 add_overlay_mod_hooklist (prop
, overlay
);
4251 if (insertion
&& (XFASTINT (start
) == endpos
4252 || XFASTINT (end
) == endpos
))
4254 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4256 add_overlay_mod_hooklist (prop
, overlay
);
4258 /* Test for intersecting intervals. This does the right thing
4259 for both insertion and deletion. */
4260 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4262 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4264 add_overlay_mod_hooklist (prop
, overlay
);
4269 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4271 /* Call the functions recorded in last_overlay_modification_hooks.
4272 First copy the vector contents, in case some of these hooks
4273 do subsequent modification of the buffer. */
4274 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4275 Lisp_Object
*copy
= alloca (size
* sizeof *copy
);
4278 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4281 gcpro1
.nvars
= size
;
4283 for (i
= 0; i
< size
;)
4285 Lisp_Object prop_i
, overlay_i
;
4287 overlay_i
= copy
[i
++];
4288 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4295 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4296 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4298 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4300 GCPRO4 (list
, arg1
, arg2
, arg3
);
4302 while (CONSP (list
))
4305 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4307 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4313 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4316 evaporate_overlays (ptrdiff_t pos
)
4318 Lisp_Object overlay
, hit_list
;
4319 struct Lisp_Overlay
*tail
;
4322 if (pos
<= current_buffer
->overlay_center
)
4323 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4326 XSETMISC (overlay
, tail
);
4327 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4330 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4331 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4332 hit_list
= Fcons (overlay
, hit_list
);
4335 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4338 XSETMISC (overlay
, tail
);
4339 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4342 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4343 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4344 hit_list
= Fcons (overlay
, hit_list
);
4346 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4347 Fdelete_overlay (XCAR (hit_list
));
4350 /* Somebody has tried to store a value with an unacceptable type
4351 in the slot with offset OFFSET. */
4354 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4356 Lisp_Object predicate
;
4360 case_Lisp_Int
: predicate
= Qintegerp
; break;
4361 case Lisp_String
: predicate
= Qstringp
; break;
4362 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4366 wrong_type_argument (predicate
, newval
);
4370 /***********************************************************************
4371 Allocation with mmap
4372 ***********************************************************************/
4374 #ifdef USE_MMAP_FOR_BUFFERS
4376 #include <sys/types.h>
4377 #include <sys/mman.h>
4380 #ifdef MAP_ANONYMOUS
4381 #define MAP_ANON MAP_ANONYMOUS
4388 #define MAP_FAILED ((void *) -1)
4400 /* Memory is allocated in regions which are mapped using mmap(2).
4401 The current implementation lets the system select mapped
4402 addresses; we're not using MAP_FIXED in general, except when
4403 trying to enlarge regions.
4405 Each mapped region starts with a mmap_region structure, the user
4406 area starts after that structure, aligned to MEM_ALIGN.
4408 +-----------------------+
4409 | struct mmap_info + |
4411 +-----------------------+
4415 +-----------------------+ */
4419 /* User-specified size. */
4420 size_t nbytes_specified
;
4422 /* Number of bytes mapped */
4423 size_t nbytes_mapped
;
4425 /* Pointer to the location holding the address of the memory
4426 allocated with the mmap'd block. The variable actually points
4427 after this structure. */
4430 /* Next and previous in list of all mmap'd regions. */
4431 struct mmap_region
*next
, *prev
;
4434 /* Doubly-linked list of mmap'd regions. */
4436 static struct mmap_region
*mmap_regions
;
4438 /* File descriptor for mmap. If we don't have anonymous mapping,
4439 /dev/zero will be opened on it. */
4443 /* Temporary storage for mmap_set_vars, see there. */
4445 static struct mmap_region
*mmap_regions_1
;
4446 static int mmap_fd_1
;
4448 /* Page size on this system. */
4450 static int mmap_page_size
;
4452 /* 1 means mmap has been initialized. */
4454 static int mmap_initialized_p
;
4456 /* Value is X rounded up to the next multiple of N. */
4458 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4460 /* Size of mmap_region structure plus padding. */
4462 #define MMAP_REGION_STRUCT_SIZE \
4463 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4465 /* Given a pointer P to the start of the user-visible part of a mapped
4466 region, return a pointer to the start of the region. */
4468 #define MMAP_REGION(P) \
4469 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4471 /* Given a pointer P to the start of a mapped region, return a pointer
4472 to the start of the user-visible part of the region. */
4474 #define MMAP_USER_AREA(P) \
4475 ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4477 #define MEM_ALIGN sizeof (double)
4479 /* Predicate returning true if part of the address range [START .. END]
4480 is currently mapped. Used to prevent overwriting an existing
4483 Default is to conservatively assume the address range is occupied by
4484 something else. This can be overridden by system configuration
4485 files if system-specific means to determine this exists. */
4487 #ifndef MMAP_ALLOCATED_P
4488 #define MMAP_ALLOCATED_P(start, end) 1
4491 /* Perform necessary initializations for the use of mmap. */
4497 /* The value of mmap_fd is initially 0 in temacs, and -1
4498 in a dumped Emacs. */
4501 /* No anonymous mmap -- we need the file descriptor. */
4502 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4504 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4506 #endif /* MAP_ANON == 0 */
4508 if (mmap_initialized_p
)
4510 mmap_initialized_p
= 1;
4516 mmap_page_size
= getpagesize ();
4519 /* Return a region overlapping address range START...END, or null if
4520 none. END is not including, i.e. the last byte in the range
4523 static struct mmap_region
*
4524 mmap_find (void *start
, void *end
)
4526 struct mmap_region
*r
;
4527 char *s
= (char *) start
, *e
= (char *) end
;
4529 for (r
= mmap_regions
; r
; r
= r
->next
)
4531 char *rstart
= (char *) r
;
4532 char *rend
= rstart
+ r
->nbytes_mapped
;
4534 if (/* First byte of range, i.e. START, in this region? */
4535 (s
>= rstart
&& s
< rend
)
4536 /* Last byte of range, i.e. END - 1, in this region? */
4537 || (e
> rstart
&& e
<= rend
)
4538 /* First byte of this region in the range? */
4539 || (rstart
>= s
&& rstart
< e
)
4540 /* Last byte of this region in the range? */
4541 || (rend
> s
&& rend
<= e
))
4549 /* Unmap a region. P is a pointer to the start of the user-araa of
4550 the region. Value is non-zero if successful. */
4553 mmap_free_1 (struct mmap_region
*r
)
4556 r
->next
->prev
= r
->prev
;
4558 r
->prev
->next
= r
->next
;
4560 mmap_regions
= r
->next
;
4562 if (munmap (r
, r
->nbytes_mapped
) == -1)
4564 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4572 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4573 Value is non-zero if successful. */
4576 mmap_enlarge (struct mmap_region
*r
, int npages
)
4578 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4584 /* Unmap pages at the end of the region. */
4585 nbytes
= - npages
* mmap_page_size
;
4586 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4587 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4590 r
->nbytes_mapped
-= nbytes
;
4594 else if (npages
> 0)
4596 nbytes
= npages
* mmap_page_size
;
4598 /* Try to map additional pages at the end of the region. We
4599 cannot do this if the address range is already occupied by
4600 something else because mmap deletes any previous mapping.
4601 I'm not sure this is worth doing, let's see. */
4602 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4606 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4607 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4608 if (p
== MAP_FAILED
)
4609 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4610 else if (p
!= region_end
)
4612 /* Kernels are free to choose a different address. In
4613 that case, unmap what we've mapped above; we have
4615 if (munmap (p
, nbytes
) == -1)
4616 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4620 r
->nbytes_mapped
+= nbytes
;
4630 /* Set or reset variables holding references to mapped regions. If
4631 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4632 non-zero, set all variables to the start of the user-areas
4635 This function is called from Fdump_emacs to ensure that the dumped
4636 Emacs doesn't contain references to memory that won't be mapped
4637 when Emacs starts. */
4640 mmap_set_vars (int restore_p
)
4642 struct mmap_region
*r
;
4646 mmap_regions
= mmap_regions_1
;
4647 mmap_fd
= mmap_fd_1
;
4648 for (r
= mmap_regions
; r
; r
= r
->next
)
4649 *r
->var
= MMAP_USER_AREA (r
);
4653 for (r
= mmap_regions
; r
; r
= r
->next
)
4655 mmap_regions_1
= mmap_regions
;
4656 mmap_regions
= NULL
;
4657 mmap_fd_1
= mmap_fd
;
4663 /* Allocate a block of storage large enough to hold NBYTES bytes of
4664 data. A pointer to the data is returned in *VAR. VAR is thus the
4665 address of some variable which will use the data area.
4667 The allocation of 0 bytes is valid.
4669 If we can't allocate the necessary memory, set *VAR to null, and
4673 mmap_alloc (void **var
, size_t nbytes
)
4680 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4681 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4684 if (p
== MAP_FAILED
)
4686 if (errno
!= ENOMEM
)
4687 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4692 struct mmap_region
*r
= (struct mmap_region
*) p
;
4694 r
->nbytes_specified
= nbytes
;
4695 r
->nbytes_mapped
= map
;
4698 r
->next
= mmap_regions
;
4703 p
= MMAP_USER_AREA (p
);
4710 /* Free a block of relocatable storage whose data is pointed to by
4711 PTR. Store 0 in *PTR to show there's no block allocated. */
4714 mmap_free (void **var
)
4720 mmap_free_1 (MMAP_REGION (*var
));
4726 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4727 resize it to size NBYTES. Change *VAR to reflect the new block,
4728 and return this value. If more memory cannot be allocated, then
4729 leave *VAR unchanged, and return null. */
4732 mmap_realloc (void **var
, size_t nbytes
)
4739 result
= mmap_alloc (var
, nbytes
);
4740 else if (nbytes
== 0)
4743 result
= mmap_alloc (var
, nbytes
);
4747 struct mmap_region
*r
= MMAP_REGION (*var
);
4748 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4753 void *old_ptr
= *var
;
4755 /* Try to map additional pages at the end of the region.
4756 If that fails, allocate a new region, copy data
4757 from the old region, then free it. */
4758 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4761 r
->nbytes_specified
= nbytes
;
4762 *var
= result
= old_ptr
;
4764 else if (mmap_alloc (var
, nbytes
))
4766 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4767 mmap_free_1 (MMAP_REGION (old_ptr
));
4769 r
= MMAP_REGION (result
);
4770 r
->nbytes_specified
= nbytes
;
4778 else if (room
- nbytes
>= mmap_page_size
)
4780 /* Shrinking by at least a page. Let's give some
4781 memory back to the system.
4783 The extra parens are to make the division happens first,
4784 on positive values, so we know it will round towards
4786 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4788 r
->nbytes_specified
= nbytes
;
4792 /* Leave it alone. */
4794 r
->nbytes_specified
= nbytes
;
4802 #endif /* USE_MMAP_FOR_BUFFERS */
4806 /***********************************************************************
4807 Buffer-text Allocation
4808 ***********************************************************************/
4810 /* Allocate NBYTES bytes for buffer B's text buffer. */
4813 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4818 #if defined USE_MMAP_FOR_BUFFERS
4819 p
= mmap_alloc ((void **) &b
->text
->beg
, nbytes
);
4820 #elif defined REL_ALLOC
4821 p
= r_alloc ((void **) &b
->text
->beg
, nbytes
);
4823 p
= xmalloc (nbytes
);
4829 memory_full (nbytes
);
4832 b
->text
->beg
= (unsigned char *) p
;
4836 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4840 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4843 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4846 #if defined USE_MMAP_FOR_BUFFERS
4847 p
= mmap_realloc ((void **) &b
->text
->beg
, nbytes
);
4848 #elif defined REL_ALLOC
4849 p
= r_re_alloc ((void **) &b
->text
->beg
, nbytes
);
4851 p
= xrealloc (b
->text
->beg
, nbytes
);
4857 memory_full (nbytes
);
4860 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4865 /* Free buffer B's text buffer. */
4868 free_buffer_text (struct buffer
*b
)
4872 #if defined USE_MMAP_FOR_BUFFERS
4873 mmap_free ((void **) &b
->text
->beg
);
4874 #elif defined REL_ALLOC
4875 r_alloc_free ((void **) &b
->text
->beg
);
4877 xfree (b
->text
->beg
);
4880 BUF_BEG_ADDR (b
) = NULL
;
4886 /***********************************************************************
4888 ***********************************************************************/
4891 init_buffer_once (void)
4894 /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make
4895 sure that this is still correct. Otherwise, mark_vectorlike may not
4896 trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */
4898 = (offsetof (struct buffer
, own_text
) - header_size
) / word_size
;
4900 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4902 /* Make sure all markable slots in buffer_defaults
4903 are initialized reasonably, so mark_buffer won't choke. */
4904 reset_buffer (&buffer_defaults
);
4905 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4906 reset_buffer_local_variables (&buffer_defaults
, 1);
4907 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4908 reset_buffer (&buffer_local_symbols
);
4909 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4910 /* Prevent GC from getting confused. */
4911 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4912 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4913 /* No one will share the text with these buffers, but let's play it safe. */
4914 buffer_defaults
.indirections
= 0;
4915 buffer_local_symbols
.indirections
= 0;
4916 buffer_set_intervals (&buffer_defaults
, NULL
);
4917 buffer_set_intervals (&buffer_local_symbols
, NULL
);
4918 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, pvecsize
);
4919 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4920 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, pvecsize
);
4921 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4923 /* Set up the default values of various buffer slots. */
4924 /* Must do these before making the first buffer! */
4926 /* real setup is done in bindings.el */
4927 BSET (&buffer_defaults
, mode_line_format
, build_pure_c_string ("%-"));
4928 BSET (&buffer_defaults
, header_line_format
, Qnil
);
4929 BSET (&buffer_defaults
, abbrev_mode
, Qnil
);
4930 BSET (&buffer_defaults
, overwrite_mode
, Qnil
);
4931 BSET (&buffer_defaults
, case_fold_search
, Qt
);
4932 BSET (&buffer_defaults
, auto_fill_function
, Qnil
);
4933 BSET (&buffer_defaults
, selective_display
, Qnil
);
4934 BSET (&buffer_defaults
, selective_display_ellipses
, Qt
);
4935 BSET (&buffer_defaults
, abbrev_table
, Qnil
);
4936 BSET (&buffer_defaults
, display_table
, Qnil
);
4937 BSET (&buffer_defaults
, undo_list
, Qnil
);
4938 BSET (&buffer_defaults
, mark_active
, Qnil
);
4939 BSET (&buffer_defaults
, file_format
, Qnil
);
4940 BSET (&buffer_defaults
, auto_save_file_format
, Qt
);
4941 buffer_set_overlays_before (&buffer_defaults
, NULL
);
4942 buffer_set_overlays_after (&buffer_defaults
, NULL
);
4943 buffer_defaults
.overlay_center
= BEG
;
4945 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4946 BSET (&buffer_defaults
, truncate_lines
, Qnil
);
4947 BSET (&buffer_defaults
, word_wrap
, Qnil
);
4948 BSET (&buffer_defaults
, ctl_arrow
, Qt
);
4949 BSET (&buffer_defaults
, bidi_display_reordering
, Qt
);
4950 BSET (&buffer_defaults
, bidi_paragraph_direction
, Qnil
);
4951 BSET (&buffer_defaults
, cursor_type
, Qt
);
4952 BSET (&buffer_defaults
, extra_line_spacing
, Qnil
);
4953 BSET (&buffer_defaults
, cursor_in_non_selected_windows
, Qt
);
4955 BSET (&buffer_defaults
, enable_multibyte_characters
, Qt
);
4956 BSET (&buffer_defaults
, buffer_file_coding_system
, Qnil
);
4957 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4958 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4959 BSET (&buffer_defaults
, cache_long_line_scans
, Qnil
);
4960 BSET (&buffer_defaults
, file_truename
, Qnil
);
4961 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4962 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4963 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4964 BSET (&buffer_defaults
, left_fringe_width
, Qnil
);
4965 BSET (&buffer_defaults
, right_fringe_width
, Qnil
);
4966 BSET (&buffer_defaults
, fringes_outside_margins
, Qnil
);
4967 BSET (&buffer_defaults
, scroll_bar_width
, Qnil
);
4968 BSET (&buffer_defaults
, vertical_scroll_bar_type
, Qt
);
4969 BSET (&buffer_defaults
, indicate_empty_lines
, Qnil
);
4970 BSET (&buffer_defaults
, indicate_buffer_boundaries
, Qnil
);
4971 BSET (&buffer_defaults
, fringe_indicator_alist
, Qnil
);
4972 BSET (&buffer_defaults
, fringe_cursor_alist
, Qnil
);
4973 BSET (&buffer_defaults
, scroll_up_aggressively
, Qnil
);
4974 BSET (&buffer_defaults
, scroll_down_aggressively
, Qnil
);
4975 BSET (&buffer_defaults
, display_time
, Qnil
);
4977 /* Assign the local-flags to the slots that have default values.
4978 The local flag is a bit that is used in the buffer
4979 to say that it has its own local value for the slot.
4980 The local flag bits are in the local_var_flags slot of the buffer. */
4982 /* Nothing can work if this isn't true */
4983 { verify (sizeof (EMACS_INT
) == word_size
); }
4985 /* 0 means not a lisp var, -1 means always local, else mask */
4986 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4987 BSET (&buffer_local_flags
, filename
, make_number (-1));
4988 BSET (&buffer_local_flags
, directory
, make_number (-1));
4989 BSET (&buffer_local_flags
, backed_up
, make_number (-1));
4990 BSET (&buffer_local_flags
, save_length
, make_number (-1));
4991 BSET (&buffer_local_flags
, auto_save_file_name
, make_number (-1));
4992 BSET (&buffer_local_flags
, read_only
, make_number (-1));
4993 BSET (&buffer_local_flags
, major_mode
, make_number (-1));
4994 BSET (&buffer_local_flags
, mode_name
, make_number (-1));
4995 BSET (&buffer_local_flags
, undo_list
, make_number (-1));
4996 BSET (&buffer_local_flags
, mark_active
, make_number (-1));
4997 BSET (&buffer_local_flags
, point_before_scroll
, make_number (-1));
4998 BSET (&buffer_local_flags
, file_truename
, make_number (-1));
4999 BSET (&buffer_local_flags
, invisibility_spec
, make_number (-1));
5000 BSET (&buffer_local_flags
, file_format
, make_number (-1));
5001 BSET (&buffer_local_flags
, auto_save_file_format
, make_number (-1));
5002 BSET (&buffer_local_flags
, display_count
, make_number (-1));
5003 BSET (&buffer_local_flags
, display_time
, make_number (-1));
5004 BSET (&buffer_local_flags
, enable_multibyte_characters
, make_number (-1));
5007 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
5008 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
5010 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
5012 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
5013 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
5014 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
5015 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
5016 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
5017 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
5018 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
5019 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
5020 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
5021 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
5022 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
5023 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
5024 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
5025 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
5026 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
5027 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
5028 /* Make this one a permanent local. */
5029 buffer_permanent_local_flags
[idx
++] = 1;
5030 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
5031 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
5032 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
5033 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5034 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5035 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5036 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5037 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5038 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5039 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5040 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5041 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5042 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5043 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5044 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5045 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5046 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5048 /* Need more room? */
5049 if (idx
>= MAX_PER_BUFFER_VARS
)
5051 last_per_buffer_idx
= idx
;
5053 Vbuffer_alist
= Qnil
;
5057 QSFundamental
= build_pure_c_string ("Fundamental");
5059 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5060 BSET (&buffer_defaults
, major_mode
, Qfundamental_mode
);
5062 Qmode_class
= intern_c_string ("mode-class");
5064 Qprotected_field
= intern_c_string ("protected-field");
5066 Qpermanent_local
= intern_c_string ("permanent-local");
5068 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5069 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5071 /* super-magic invisible buffer */
5072 Vprin1_to_string_buffer
= Fget_buffer_create (build_pure_c_string (" prin1"));
5073 Vbuffer_alist
= Qnil
;
5075 Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*")));
5077 inhibit_modification_hooks
= 0;
5087 #ifdef USE_MMAP_FOR_BUFFERS
5089 /* When using the ralloc implementation based on mmap(2), buffer
5090 text pointers will have been set to null in the dumped Emacs.
5095 if (b
->text
->beg
== NULL
)
5096 enlarge_buffer_text (b
, 0);
5098 #endif /* USE_MMAP_FOR_BUFFERS */
5100 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5101 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5102 Fset_buffer_multibyte (Qnil
);
5104 pwd
= get_current_dir_name ();
5107 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5109 /* Maybe this should really use some standard subroutine
5110 whose definition is filename syntax dependent. */
5112 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5114 /* Grow buffer to add directory separator and '\0'. */
5115 pwd
= realloc (pwd
, len
+ 2);
5117 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5118 pwd
[len
] = DIRECTORY_SEP
;
5119 pwd
[len
+ 1] = '\0';
5123 BSET (current_buffer
, directory
, make_unibyte_string (pwd
, len
));
5124 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5125 /* At this moment, we still don't know how to decode the
5126 directory name. So, we keep the bytes in multibyte form so
5127 that ENCODE_FILE correctly gets the original bytes. */
5128 BSET (current_buffer
, directory
,
5129 string_to_multibyte (BVAR (current_buffer
, directory
)));
5131 /* Add /: to the front of the name
5132 if it would otherwise be treated as magic. */
5133 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5135 /* If the default dir is just /, TEMP is non-nil
5136 because of the ange-ftp completion handler.
5137 However, it is not necessary to turn / into /:/.
5138 So avoid doing that. */
5139 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5140 BSET (current_buffer
, directory
,
5141 concat2 (build_string ("/:"), BVAR (current_buffer
, directory
)));
5143 temp
= get_minibuffer (0);
5144 BSET (XBUFFER (temp
), directory
, BVAR (current_buffer
, directory
));
5149 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5150 Object stored in the current buffer. address is the address of the slot
5151 in the buffer that is current now. */
5153 /* TYPE is nil for a general Lisp variable.
5154 An integer specifies a type; then only Lisp values
5155 with that type code are allowed (except that nil is allowed too).
5156 LNAME is the Lisp-level variable name.
5157 VNAME is the name of the buffer slot.
5158 DOC is a dummy where you write the doc string as a comment. */
5159 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5161 static struct Lisp_Buffer_Objfwd bo_fwd; \
5162 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5166 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5167 Lisp_Object
*address
, Lisp_Object type
)
5169 struct Lisp_Symbol
*sym
;
5172 sym
= XSYMBOL (intern (namestring
));
5173 offset
= (char *)address
- (char *)current_buffer
;
5175 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5176 bo_fwd
->offset
= offset
;
5177 bo_fwd
->slottype
= type
;
5178 sym
->declared_special
= 1;
5179 sym
->redirect
= SYMBOL_FORWARDED
;
5181 /* I tried to do the job without a cast, but it seems impossible.
5182 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5183 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5185 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5187 if (PER_BUFFER_IDX (offset
) == 0)
5188 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5189 slot of buffer_local_flags */
5194 /* initialize the buffer routines */
5196 syms_of_buffer (void)
5198 staticpro (&last_overlay_modification_hooks
);
5199 last_overlay_modification_hooks
5200 = Fmake_vector (make_number (10), Qnil
);
5202 staticpro (&Vbuffer_defaults
);
5203 staticpro (&Vbuffer_local_symbols
);
5204 staticpro (&Qfundamental_mode
);
5205 staticpro (&Qmode_class
);
5206 staticpro (&QSFundamental
);
5207 staticpro (&Vbuffer_alist
);
5208 staticpro (&Qprotected_field
);
5209 staticpro (&Qpermanent_local
);
5210 staticpro (&Qkill_buffer_hook
);
5212 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5213 DEFSYM (Qoverlayp
, "overlayp");
5214 DEFSYM (Qevaporate
, "evaporate");
5215 DEFSYM (Qmodification_hooks
, "modification-hooks");
5216 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5217 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5218 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5219 DEFSYM (Qpriority
, "priority");
5220 DEFSYM (Qbefore_string
, "before-string");
5221 DEFSYM (Qafter_string
, "after-string");
5222 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5223 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5224 DEFSYM (Qafter_change_functions
, "after-change-functions");
5225 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5227 Fput (Qprotected_field
, Qerror_conditions
,
5228 listn (CONSTYPE_PURE
, 2, Qprotected_field
, Qerror
));
5229 Fput (Qprotected_field
, Qerror_message
,
5230 build_pure_c_string ("Attempt to modify a protected field"));
5232 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5234 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5235 This is the same as (default-value 'mode-line-format). */);
5237 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5239 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5240 This is the same as (default-value 'header-line-format). */);
5242 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5243 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5244 This is the same as (default-value 'cursor-type). */);
5246 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5248 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5249 This is the same as (default-value 'line-spacing). */);
5251 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5252 cursor_in_non_selected_windows
,
5253 doc
: /* Default value of `cursor-in-non-selected-windows'.
5254 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5256 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5258 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5259 This is the same as (default-value 'abbrev-mode). */);
5261 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5263 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5264 This is the same as (default-value 'ctl-arrow). */);
5266 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5267 enable_multibyte_characters
,
5268 doc
: /* Default value of `enable-multibyte-characters' for buffers not overriding it.
5269 This is the same as (default-value 'enable-multibyte-characters). */);
5271 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5272 buffer_file_coding_system
,
5273 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5274 This is the same as (default-value 'buffer-file-coding-system). */);
5276 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5278 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5279 This is the same as (default-value 'truncate-lines). */);
5281 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5283 doc
: /* Default value of `fill-column' for buffers that do not override it.
5284 This is the same as (default-value 'fill-column). */);
5286 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5288 doc
: /* Default value of `left-margin' for buffers that do not override it.
5289 This is the same as (default-value 'left-margin). */);
5291 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5293 doc
: /* Default value of `tab-width' for buffers that do not override it.
5294 This is the same as (default-value 'tab-width). */);
5296 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5298 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5299 This is the same as (default-value 'case-fold-search). */);
5301 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5303 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5304 This is the same as (default-value 'left-margin-width). */);
5306 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5308 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5309 This is the same as (default-value 'right-margin-width). */);
5311 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5313 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5314 This is the same as (default-value 'left-fringe-width). */);
5316 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5318 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5319 This is the same as (default-value 'right-fringe-width). */);
5321 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5322 fringes_outside_margins
,
5323 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5324 This is the same as (default-value 'fringes-outside-margins). */);
5326 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5328 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5329 This is the same as (default-value 'scroll-bar-width). */);
5331 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5332 vertical_scroll_bar_type
,
5333 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5334 This is the same as (default-value 'vertical-scroll-bar). */);
5336 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5337 indicate_empty_lines
,
5338 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5339 This is the same as (default-value 'indicate-empty-lines). */);
5341 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5342 indicate_buffer_boundaries
,
5343 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5344 This is the same as (default-value 'indicate-buffer-boundaries). */);
5346 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5347 fringe_indicator_alist
,
5348 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5349 This is the same as (default-value 'fringe-indicator-alist'). */);
5351 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5352 fringe_cursor_alist
,
5353 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5354 This is the same as (default-value 'fringe-cursor-alist'). */);
5356 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5357 scroll_up_aggressively
,
5358 doc
: /* Default value of `scroll-up-aggressively'.
5359 This value applies in buffers that don't have their own local values.
5360 This is the same as (default-value 'scroll-up-aggressively). */);
5362 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5363 scroll_down_aggressively
,
5364 doc
: /* Default value of `scroll-down-aggressively'.
5365 This value applies in buffers that don't have their own local values.
5366 This is the same as (default-value 'scroll-down-aggressively). */);
5368 DEFVAR_PER_BUFFER ("header-line-format",
5369 &BVAR (current_buffer
, header_line_format
),
5371 doc
: /* Analogous to `mode-line-format', but controls the header line.
5372 The header line appears, optionally, at the top of a window;
5373 the mode line appears at the bottom. */);
5375 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5377 doc
: /* Template for displaying mode line for current buffer.
5379 The value may be nil, a string, a symbol or a list.
5381 A value of nil means don't display a mode line.
5383 For any symbol other than t or nil, the symbol's value is processed as
5384 a mode line construct. As a special exception, if that value is a
5385 string, the string is processed verbatim, without handling any
5386 %-constructs (see below). Also, unless the symbol has a non-nil
5387 `risky-local-variable' property, all properties in any strings, as
5388 well as all :eval and :propertize forms in the value, are ignored.
5390 A list whose car is a string or list is processed by processing each
5391 of the list elements recursively, as separate mode line constructs,
5392 and concatenating the results.
5394 A list of the form `(:eval FORM)' is processed by evaluating FORM and
5395 using the result as a mode line construct. Be careful--FORM should
5396 not load any files, because that can cause an infinite recursion.
5398 A list of the form `(:propertize ELT PROPS...)' is processed by
5399 processing ELT as the mode line construct, and adding the text
5400 properties PROPS to the result.
5402 A list whose car is a symbol is processed by examining the symbol's
5403 value, and, if that value is non-nil, processing the cadr of the list
5404 recursively; and if that value is nil, processing the caddr of the
5407 A list whose car is an integer is processed by processing the cadr of
5408 the list, and padding (if the number is positive) or truncating (if
5409 negative) to the width specified by that number.
5411 A string is printed verbatim in the mode line except for %-constructs:
5412 %b -- print buffer name. %f -- print visited file name.
5413 %F -- print frame name.
5414 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5415 %& is like %*, but ignore read-only-ness.
5416 % means buffer is read-only and * means it is modified.
5417 For a modified read-only buffer, %* gives % and %+ gives *.
5418 %s -- print process status. %l -- print the current line number.
5419 %c -- print the current column number (this makes editing slower).
5420 To make the column number update correctly in all cases,
5421 `column-number-mode' must be non-nil.
5422 %i -- print the size of the buffer.
5423 %I -- like %i, but use k, M, G, etc., to abbreviate.
5424 %p -- print percent of buffer above top of window, or Top, Bot or All.
5425 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5426 or print Bottom or All.
5427 %n -- print Narrow if appropriate.
5428 %t -- visited file is text or binary (if OS supports this distinction).
5429 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5430 %Z -- like %z, but including the end-of-line format.
5431 %e -- print error message about full memory.
5432 %@ -- print @ or hyphen. @ means that default-directory is on a
5434 %[ -- print one [ for each recursive editing level. %] similar.
5435 %% -- print %. %- -- print infinitely many dashes.
5436 Decimal digits after the % specify field width to which to pad. */);
5438 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5439 doc
: /* Value of `major-mode' for new buffers. */);
5441 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5442 make_number (Lisp_Symbol
),
5443 doc
: /* Symbol for current buffer's major mode.
5444 The default value (normally `fundamental-mode') affects new buffers.
5445 A value of nil means to use the current buffer's major mode, provided
5446 it is not marked as "special".
5448 When a mode is used by default, `find-file' switches to it before it
5449 reads the contents into the buffer and before it finishes setting up
5450 the buffer. Thus, the mode and its hooks should not expect certain
5451 variables such as `buffer-read-only' and `buffer-file-coding-system'
5454 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5456 doc
: /* Pretty name of current buffer's major mode.
5457 Usually a string, but can use any of the constructs for `mode-line-format',
5459 Format with `format-mode-line' to produce a string value. */);
5461 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5462 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5464 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5465 doc
: /* Non-nil if Abbrev mode is enabled.
5466 Use the command `abbrev-mode' to change this variable. */);
5468 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5470 doc
: /* Non-nil if searches and matches should ignore case. */);
5472 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5473 make_number (Lisp_Int0
),
5474 doc
: /* Column beyond which automatic line-wrapping should happen.
5475 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5477 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5478 make_number (Lisp_Int0
),
5479 doc
: /* Column for the default `indent-line-function' to indent to.
5480 Linefeed indents to this column in Fundamental mode. */);
5482 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5483 make_number (Lisp_Int0
),
5484 doc
: /* Distance between tab stops (for display of tab characters), in columns.
5485 This should be an integer greater than zero. */);
5487 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5488 doc
: /* Non-nil means display control chars with uparrow.
5489 A value of nil means use backslash and octal digits.
5490 This variable does not apply to characters whose display is specified
5491 in the current display table (if there is one). */);
5493 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5494 &BVAR (current_buffer
, enable_multibyte_characters
),
5496 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5497 Otherwise they are regarded as unibyte. This affects the display,
5498 file I/O and the behavior of various editing commands.
5500 This variable is buffer-local but you cannot set it directly;
5501 use the function `set-buffer-multibyte' to change a buffer's representation.
5502 See also Info node `(elisp)Text Representations'. */);
5503 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5505 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5506 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5507 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5508 This variable applies to saving the buffer, and also to `write-region'
5509 and other functions that use `write-region'.
5510 It does not apply to sending output to subprocesses, however.
5512 If this is nil, the buffer is saved without any code conversion
5513 unless some coding system is specified in `file-coding-system-alist'
5514 for the buffer file.
5516 If the text to be saved cannot be encoded as specified by this variable,
5517 an alternative encoding is selected by `select-safe-coding-system', which see.
5519 The variable `coding-system-for-write', if non-nil, overrides this variable.
5521 This variable is never applied to a way of decoding a file while reading it. */);
5523 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5524 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5525 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5527 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5528 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5529 doc
: /* If non-nil, forces directionality of text paragraphs in the buffer.
5531 If this is nil (the default), the direction of each paragraph is
5532 determined by the first strong directional character of its text.
5533 The values of `right-to-left' and `left-to-right' override that.
5534 Any other value is treated as nil.
5536 This variable has no effect unless the buffer's value of
5537 \`bidi-display-reordering' is non-nil. */);
5539 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5540 doc
: /* Non-nil means do not display continuation lines.
5541 Instead, give each line of text just one screen line.
5543 Note that this is overridden by the variable
5544 `truncate-partial-width-windows' if that variable is non-nil
5545 and this buffer is not full-frame width.
5547 Minibuffers set this variable to nil. */);
5549 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5550 doc
: /* Non-nil means to use word-wrapping for continuation lines.
5551 When word-wrapping is on, continuation lines are wrapped at the space
5552 or tab character nearest to the right window edge.
5553 If nil, continuation lines are wrapped at the right screen edge.
5555 This variable has no effect if long lines are truncated (see
5556 `truncate-lines' and `truncate-partial-width-windows'). If you use
5557 word-wrapping, you might want to reduce the value of
5558 `truncate-partial-width-windows', since wrapping can make text readable
5559 in narrower windows.
5561 Instead of setting this variable directly, most users should use
5562 Visual Line mode . Visual Line mode, when enabled, sets `word-wrap'
5563 to t, and additionally redefines simple editing commands to act on
5564 visual lines rather than logical lines. See the documentation of
5565 `visual-line-mode'. */);
5567 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5568 make_number (Lisp_String
),
5569 doc
: /* Name of default directory of current buffer. Should end with slash.
5570 To interactively change the default directory, use command `cd'. */);
5572 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5574 doc
: /* Function called (if non-nil) to perform auto-fill.
5575 It is called after self-inserting any character specified in
5576 the `auto-fill-chars' table.
5577 NOTE: This variable is not a hook;
5578 its value may not be a list of functions. */);
5580 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5581 make_number (Lisp_String
),
5582 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5584 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5585 make_number (Lisp_String
),
5586 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5587 The truename of a file is calculated by `file-truename'
5588 and then abbreviated with `abbreviate-file-name'. */);
5590 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5591 &BVAR (current_buffer
, auto_save_file_name
),
5592 make_number (Lisp_String
),
5593 doc
: /* Name of file for auto-saving current buffer.
5594 If it is nil, that means don't auto-save this buffer. */);
5596 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5597 doc
: /* Non-nil if this buffer is read-only. */);
5599 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5600 doc
: /* Non-nil if this buffer's file has been backed up.
5601 Backing up is done before the first time the file is saved. */);
5603 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5604 make_number (Lisp_Int0
),
5605 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5607 -1 means auto-saving turned off until next real save.
5609 If you set this to -2, that means don't turn off auto-saving in this buffer
5610 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5611 you probably should set this to -2 in that buffer. */);
5613 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5615 doc
: /* Non-nil enables selective display.
5616 An integer N as value means display only lines
5617 that start with less than N columns of space.
5618 A value of t means that the character ^M makes itself and
5619 all the rest of the line invisible; also, when saving the buffer
5620 in a file, save the ^M as a newline. */);
5622 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5623 &BVAR (current_buffer
, selective_display_ellipses
),
5625 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5627 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5628 doc
: /* Non-nil if self-insertion should replace existing text.
5629 The value should be one of `overwrite-mode-textual',
5630 `overwrite-mode-binary', or nil.
5631 If it is `overwrite-mode-textual', self-insertion still
5632 inserts at the end of a line, and inserts when point is before a tab,
5633 until the tab is filled in.
5634 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5636 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5638 doc
: /* Display table that controls display of the contents of current buffer.
5640 If this variable is nil, the value of `standard-display-table' is used.
5641 Each window can have its own, overriding display table, see
5642 `set-window-display-table' and `window-display-table'.
5644 The display table is a char-table created with `make-display-table'.
5645 A char-table is an array indexed by character codes. Normal array
5646 primitives `aref' and `aset' can be used to access elements of a char-table.
5648 Each of the char-table elements control how to display the corresponding
5649 text character: the element at index C in the table says how to display
5650 the character whose code is C. Each element should be a vector of
5651 characters or nil. The value nil means display the character in the
5652 default fashion; otherwise, the characters from the vector are delivered
5653 to the screen instead of the original character.
5655 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5656 to display a capital Y instead of each X character.
5658 In addition, a char-table has six extra slots to control the display of:
5660 the end of a truncated screen line (extra-slot 0, a single character);
5661 the end of a continued line (extra-slot 1, a single character);
5662 the escape character used to display character codes in octal
5663 (extra-slot 2, a single character);
5664 the character used as an arrow for control characters (extra-slot 3,
5665 a single character);
5666 the decoration indicating the presence of invisible lines (extra-slot 4,
5667 a vector of characters);
5668 the character used to draw the border between side-by-side windows
5669 (extra-slot 5, a single character).
5671 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5673 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5675 doc
: /* Width of left marginal area for display of a buffer.
5676 A value of nil means no marginal area. */);
5678 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5680 doc
: /* Width of right marginal area for display of a buffer.
5681 A value of nil means no marginal area. */);
5683 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5685 doc
: /* Width of this buffer's left fringe (in pixels).
5686 A value of 0 means no left fringe is shown in this buffer's window.
5687 A value of nil means to use the left fringe width from the window's frame. */);
5689 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5691 doc
: /* Width of this buffer's right fringe (in pixels).
5692 A value of 0 means no right fringe is shown in this buffer's window.
5693 A value of nil means to use the right fringe width from the window's frame. */);
5695 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5697 doc
: /* Non-nil means to display fringes outside display margins.
5698 A value of nil means to display fringes between margins and buffer text. */);
5700 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5702 doc
: /* Width of this buffer's scroll bars in pixels.
5703 A value of nil means to use the scroll bar width from the window's frame. */);
5705 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5707 doc
: /* Position of this buffer's vertical scroll bar.
5708 The value takes effect whenever you tell a window to display this buffer;
5709 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5711 A value of `left' or `right' means put the vertical scroll bar at that side
5712 of the window; a value of nil means don't show any vertical scroll bars.
5713 A value of t (the default) means do whatever the window's frame specifies. */);
5715 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5716 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5717 doc
: /* Visually indicate empty lines after the buffer end.
5718 If non-nil, a bitmap is displayed in the left fringe of a window on
5719 window-systems. */);
5721 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5722 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5723 doc
: /* Visually indicate buffer boundaries and scrolling.
5724 If non-nil, the first and last line of the buffer are marked in the fringe
5725 of a window on window-systems with angle bitmaps, or if the window can be
5726 scrolled, the top and bottom line of the window are marked with up and down
5729 If value is a symbol `left' or `right', both angle and arrow bitmaps
5730 are displayed in the left or right fringe, resp. Any other value
5731 that doesn't look like an alist means display the angle bitmaps in
5732 the left fringe but no arrows.
5734 You can exercise more precise control by using an alist as the
5735 value. Each alist element (INDICATOR . POSITION) specifies
5736 where to show one of the indicators. INDICATOR is one of `top',
5737 `bottom', `up', `down', or t, which specifies the default position,
5738 and POSITION is one of `left', `right', or nil, meaning do not show
5741 For example, ((top . left) (t . right)) places the top angle bitmap in
5742 left fringe, the bottom angle bitmap in right fringe, and both arrow
5743 bitmaps in right fringe. To show just the angle bitmaps in the left
5744 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5746 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5747 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5748 doc
: /* Mapping from logical to physical fringe indicator bitmaps.
5749 The value is an alist where each element (INDICATOR . BITMAPS)
5750 specifies the fringe bitmaps used to display a specific logical
5753 INDICATOR specifies the logical indicator type which is one of the
5754 following symbols: `truncation' , `continuation', `overlay-arrow',
5755 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5757 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5758 the actual bitmap shown in the left or right fringe for the logical
5759 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5760 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5761 are used only for the `bottom' and `top-bottom' indicators when the
5762 last (only) line has no final newline. BITMAPS may also be a single
5763 symbol which is used in both left and right fringes. */);
5765 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5766 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5767 doc
: /* Mapping from logical to physical fringe cursor bitmaps.
5768 The value is an alist where each element (CURSOR . BITMAP)
5769 specifies the fringe bitmaps used to display a specific logical
5770 cursor type in the fringe.
5772 CURSOR specifies the logical cursor type which is one of the following
5773 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5774 one is used to show a hollow cursor on narrow lines display lines
5775 where the normal hollow cursor will not fit.
5777 BITMAP is the corresponding fringe bitmap shown for the logical
5780 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5781 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5782 doc
: /* How far to scroll windows upward.
5783 If you move point off the bottom, the window scrolls automatically.
5784 This variable controls how far it scrolls. The value nil, the default,
5785 means scroll to center point. A fraction means scroll to put point
5786 that fraction of the window's height from the bottom of the window.
5787 When the value is 0.0, point goes at the bottom line, which in the
5788 simple case that you moved off with C-f means scrolling just one line.
5789 1.0 means point goes at the top, so that in that simple case, the
5790 window scrolls by a full window height. Meaningful values are
5791 between 0.0 and 1.0, inclusive. */);
5793 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5794 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5795 doc
: /* How far to scroll windows downward.
5796 If you move point off the top, the window scrolls automatically.
5797 This variable controls how far it scrolls. The value nil, the default,
5798 means scroll to center point. A fraction means scroll to put point
5799 that fraction of the window's height from the top of the window.
5800 When the value is 0.0, point goes at the top line, which in the
5801 simple case that you moved off with C-b means scrolling just one line.
5802 1.0 means point goes at the bottom, so that in that simple case, the
5803 window scrolls by a full window height. Meaningful values are
5804 between 0.0 and 1.0, inclusive. */);
5806 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5810 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5811 doc
: /* List of functions to call before each text change.
5812 Two arguments are passed to each function: the positions of
5813 the beginning and end of the range of old text to be changed.
5814 \(For an insertion, the beginning and end are at the same place.)
5815 No information is given about the length of the text after the change.
5817 Buffer changes made while executing the `before-change-functions'
5818 don't call any before-change or after-change functions.
5819 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5821 If an unhandled error happens in running these functions,
5822 the variable's value remains nil. That prevents the error
5823 from happening repeatedly and making Emacs nonfunctional. */);
5824 Vbefore_change_functions
= Qnil
;
5826 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5827 doc
: /* List of functions to call after each text change.
5828 Three arguments are passed to each function: the positions of
5829 the beginning and end of the range of changed text,
5830 and the length in bytes of the pre-change text replaced by that range.
5831 \(For an insertion, the pre-change length is zero;
5832 for a deletion, that length is the number of bytes deleted,
5833 and the post-change beginning and end are at the same place.)
5835 Buffer changes made while executing the `after-change-functions'
5836 don't call any before-change or after-change functions.
5837 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5839 If an unhandled error happens in running these functions,
5840 the variable's value remains nil. That prevents the error
5841 from happening repeatedly and making Emacs nonfunctional. */);
5842 Vafter_change_functions
= Qnil
;
5844 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5845 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5846 The functions are run using the `run-hooks' function. */);
5847 Vfirst_change_hook
= Qnil
;
5849 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5850 doc
: /* List of undo entries in current buffer.
5851 Recent changes come first; older changes follow newer.
5853 An entry (BEG . END) represents an insertion which begins at
5854 position BEG and ends at position END.
5856 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5857 from (abs POSITION). If POSITION is positive, point was at the front
5858 of the text being deleted; if negative, point was at the end.
5860 An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously
5861 unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time)
5862 and is the visited file's modification time, as of that time. If the
5863 modification time of the most recent save is different, this entry is
5866 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5867 was modified between BEG and END. PROPERTY is the property name,
5868 and VALUE is the old value.
5870 An entry (apply FUN-NAME . ARGS) means undo the change with
5871 \(apply FUN-NAME ARGS).
5873 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5874 in the active region. BEG and END is the range affected by this entry
5875 and DELTA is the number of bytes added or deleted in that range by
5878 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5879 was adjusted in position by the offset DISTANCE (an integer).
5881 An entry of the form POSITION indicates that point was at the buffer
5882 location given by the integer. Undoing an entry of this form places
5885 Entries with value `nil' mark undo boundaries. The undo command treats
5886 the changes between two undo boundaries as a single step to be undone.
5888 If the value of the variable is t, undo information is not recorded. */);
5890 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5891 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5893 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5894 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5896 Normally, the line-motion functions work by scanning the buffer for
5897 newlines. Columnar operations (like `move-to-column' and
5898 `compute-motion') also work by scanning the buffer, summing character
5899 widths as they go. This works well for ordinary text, but if the
5900 buffer's lines are very long (say, more than 500 characters), these
5901 motion functions will take longer to execute. Emacs may also take
5902 longer to update the display.
5904 If `cache-long-line-scans' is non-nil, these motion functions cache the
5905 results of their scans, and consult the cache to avoid rescanning
5906 regions of the buffer until the text is modified. The caches are most
5907 beneficial when they prevent the most searching---that is, when the
5908 buffer contains long lines and large regions of characters with the
5909 same, fixed screen width.
5911 When `cache-long-line-scans' is non-nil, processing short lines will
5912 become slightly slower (because of the overhead of consulting the
5913 cache), and the caches will use memory roughly proportional to the
5914 number of newlines and characters whose screen width varies.
5916 The caches require no explicit maintenance; their accuracy is
5917 maintained internally by the Emacs primitives. Enabling or disabling
5918 the cache should not affect the behavior of any of the motion
5919 functions; it should only affect their performance. */);
5921 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5922 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5924 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5925 doc
: /* List of formats to use when saving this buffer.
5926 Formats are defined by `format-alist'. This variable is
5927 set when a file is visited. */);
5929 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5930 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5931 doc
: /* Format in which to write auto-save files.
5932 Should be a list of symbols naming formats that are defined in `format-alist'.
5933 If it is t, which is the default, auto-save files are written in the
5934 same format as a regular save would use. */);
5936 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5937 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5938 doc
: /* Invisibility spec of this buffer.
5939 The default is t, which means that text is invisible
5940 if it has a non-nil `invisible' property.
5941 If the value is a list, a text character is invisible if its `invisible'
5942 property is an element in that list (or is a list with members in common).
5943 If an element is a cons cell of the form (PROP . ELLIPSIS),
5944 then characters with property value PROP are invisible,
5945 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5947 DEFVAR_PER_BUFFER ("buffer-display-count",
5948 &BVAR (current_buffer
, display_count
), Qnil
,
5949 doc
: /* A number incremented each time this buffer is displayed in a window.
5950 The function `set-window-buffer' increments it. */);
5952 DEFVAR_PER_BUFFER ("buffer-display-time",
5953 &BVAR (current_buffer
, display_time
), Qnil
,
5954 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5955 The function `set-window-buffer' updates this variable
5956 to the value obtained by calling `current-time'.
5957 If the buffer has never been shown in a window, the value is nil. */);
5959 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5960 doc
: /* Non-nil if Transient Mark mode is enabled.
5961 See the command `transient-mark-mode' for a description of this minor mode.
5963 Non-nil also enables highlighting of the region whenever the mark is active.
5964 The variable `highlight-nonselected-windows' controls whether to highlight
5965 all windows or just the selected window.
5967 Lisp programs may give this variable certain special values:
5969 - A value of `lambda' enables Transient Mark mode temporarily.
5970 It is disabled again after any subsequent action that would
5971 normally deactivate the mark (e.g. buffer modification).
5973 - A value of (only . OLDVAL) enables Transient Mark mode
5974 temporarily. After any subsequent point motion command that is
5975 not shift-translated, or any other action that would normally
5976 deactivate the mark (e.g. buffer modification), the value of
5977 `transient-mark-mode' is set to OLDVAL. */);
5978 Vtransient_mark_mode
= Qnil
;
5980 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5981 doc
: /* Non-nil means disregard read-only status of buffers or characters.
5982 If the value is t, disregard `buffer-read-only' and all `read-only'
5983 text properties. If the value is a list, disregard `buffer-read-only'
5984 and disregard a `read-only' text property if the property value
5985 is a member of the list. */);
5986 Vinhibit_read_only
= Qnil
;
5988 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5989 doc
: /* Cursor to use when this buffer is in the selected window.
5990 Values are interpreted as follows:
5992 t use the cursor specified for the frame
5993 nil don't display a cursor
5994 box display a filled box cursor
5995 hollow display a hollow box cursor
5996 bar display a vertical bar cursor with default width
5997 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5998 hbar display a horizontal bar cursor with default height
5999 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6000 ANYTHING ELSE display a hollow box cursor
6002 When the buffer is displayed in a non-selected window, the
6003 cursor's appearance is instead controlled by the variable
6004 `cursor-in-non-selected-windows'. */);
6006 DEFVAR_PER_BUFFER ("line-spacing",
6007 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
6008 doc
: /* Additional space to put between lines when displaying a buffer.
6009 The space is measured in pixels, and put below lines on graphic displays,
6010 see `display-graphic-p'.
6011 If value is a floating point number, it specifies the spacing relative
6012 to the default frame line height. A value of nil means add no extra space. */);
6014 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6015 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
6016 doc
: /* Non-nil means show a cursor in non-selected windows.
6017 If nil, only shows a cursor in the selected window.
6018 If t, displays a cursor related to the usual cursor type
6019 \(a solid box becomes hollow, a bar becomes a narrower bar).
6020 You can also specify the cursor type as in the `cursor-type' variable.
6021 Use Custom to set this variable and update the display." */);
6023 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
6024 doc
: /* List of functions called with no args to query before killing a buffer.
6025 The buffer being killed will be current while the functions are running.
6027 If any of them returns nil, the buffer is not killed. Functions run by
6028 this hook are supposed to not change the current buffer. */);
6029 Vkill_buffer_query_functions
= Qnil
;
6031 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
6032 doc
: /* Normal hook run before changing the major mode of a buffer.
6033 The function `kill-all-local-variables' runs this before doing anything else. */);
6034 Vchange_major_mode_hook
= Qnil
;
6035 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
6037 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
6038 doc
: /* Hook run when the buffer list changes.
6039 Functions running this hook are `get-buffer-create',
6040 `make-indirect-buffer', `rename-buffer', `kill-buffer',
6041 and `bury-buffer-internal'. */);
6042 Vbuffer_list_update_hook
= Qnil
;
6043 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
6045 defsubr (&Sbuffer_live_p
);
6046 defsubr (&Sbuffer_list
);
6047 defsubr (&Sget_buffer
);
6048 defsubr (&Sget_file_buffer
);
6049 defsubr (&Sget_buffer_create
);
6050 defsubr (&Smake_indirect_buffer
);
6051 defsubr (&Sgenerate_new_buffer_name
);
6052 defsubr (&Sbuffer_name
);
6053 defsubr (&Sbuffer_file_name
);
6054 defsubr (&Sbuffer_base_buffer
);
6055 defsubr (&Sbuffer_local_value
);
6056 defsubr (&Sbuffer_local_variables
);
6057 defsubr (&Sbuffer_modified_p
);
6058 defsubr (&Sset_buffer_modified_p
);
6059 defsubr (&Sbuffer_modified_tick
);
6060 defsubr (&Sbuffer_chars_modified_tick
);
6061 defsubr (&Srename_buffer
);
6062 defsubr (&Sother_buffer
);
6063 defsubr (&Sbuffer_enable_undo
);
6064 defsubr (&Skill_buffer
);
6065 defsubr (&Sbury_buffer_internal
);
6066 defsubr (&Sset_buffer_major_mode
);
6067 defsubr (&Scurrent_buffer
);
6068 defsubr (&Sset_buffer
);
6069 defsubr (&Sbarf_if_buffer_read_only
);
6070 defsubr (&Serase_buffer
);
6071 defsubr (&Sbuffer_swap_text
);
6072 defsubr (&Sset_buffer_multibyte
);
6073 defsubr (&Skill_all_local_variables
);
6075 defsubr (&Soverlayp
);
6076 defsubr (&Smake_overlay
);
6077 defsubr (&Sdelete_overlay
);
6078 defsubr (&Smove_overlay
);
6079 defsubr (&Soverlay_start
);
6080 defsubr (&Soverlay_end
);
6081 defsubr (&Soverlay_buffer
);
6082 defsubr (&Soverlay_properties
);
6083 defsubr (&Soverlays_at
);
6084 defsubr (&Soverlays_in
);
6085 defsubr (&Snext_overlay_change
);
6086 defsubr (&Sprevious_overlay_change
);
6087 defsubr (&Soverlay_recenter
);
6088 defsubr (&Soverlay_lists
);
6089 defsubr (&Soverlay_get
);
6090 defsubr (&Soverlay_put
);
6091 defsubr (&Srestore_buffer_modified_p
);
6095 keys_of_buffer (void)
6097 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6098 initial_define_key (control_x_map
, 'k', "kill-buffer");
6100 /* This must not be in syms_of_buffer, because Qdisabled is not
6101 initialized when that function gets called. */
6102 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);