1 /* Buffer manipulation primitives for GNU Emacs.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2012 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
24 #include <sys/param.h>
33 #include "intervals.h"
36 #include "character.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
45 struct buffer
*current_buffer
; /* the current buffer */
47 /* First buffer in chain of all buffers (in reverse order of creation).
48 Threaded through ->header.next.buffer. */
50 struct buffer
*all_buffers
;
52 /* This structure holds the default values of the buffer-local variables
53 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
54 The default value occupies the same slot in this structure
55 as an individual buffer's value occupies in that buffer.
56 Setting the default value also goes through the alist of buffers
57 and stores into each buffer that does not say it has a local value. */
59 DECL_ALIGN (struct buffer
, buffer_defaults
);
61 /* A Lisp_Object pointer to the above, used for staticpro */
63 static Lisp_Object Vbuffer_defaults
;
65 /* This structure marks which slots in a buffer have corresponding
66 default values in buffer_defaults.
67 Each such slot has a nonzero value in this structure.
68 The value has only one nonzero bit.
70 When a buffer has its own local value for a slot,
71 the entry for that slot (found in the same slot in this structure)
72 is turned on in the buffer's local_flags array.
74 If a slot in this structure is -1, then even though there may
75 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
76 and the corresponding slot in buffer_defaults is not used.
78 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
79 zero, that is a bug */
81 struct buffer buffer_local_flags
;
83 /* This structure holds the names of symbols whose values may be
84 buffer-local. It is indexed and accessed in the same way as the above. */
86 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
88 /* A Lisp_Object pointer to the above, used for staticpro */
89 static Lisp_Object Vbuffer_local_symbols
;
91 /* Return the symbol of the per-buffer variable at offset OFFSET in
92 the buffer structure. */
94 #define PER_BUFFER_SYMBOL(OFFSET) \
95 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
97 /* Maximum length of an overlay vector. */
98 #define OVERLAY_COUNT_MAX \
99 ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \
100 min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object)))
102 /* Flags indicating which built-in buffer-local variables
103 are permanent locals. */
104 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
106 /* Number of per-buffer variables used. */
108 int last_per_buffer_idx
;
110 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
111 int after
, Lisp_Object arg1
,
112 Lisp_Object arg2
, Lisp_Object arg3
);
113 static void swap_out_buffer_local_variables (struct buffer
*b
);
114 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
116 /* Alist of all buffer names vs the buffers. */
117 /* This used to be a variable, but is no longer,
118 to prevent lossage due to user rplac'ing this alist or its elements. */
119 Lisp_Object Vbuffer_alist
;
121 static Lisp_Object Qkill_buffer_query_functions
;
123 /* Hook run before changing a major mode. */
124 static Lisp_Object Qchange_major_mode_hook
;
126 Lisp_Object Qfirst_change_hook
;
127 Lisp_Object Qbefore_change_functions
;
128 Lisp_Object Qafter_change_functions
;
130 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
131 static Lisp_Object Qpermanent_local_hook
;
133 static Lisp_Object Qprotected_field
;
135 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
137 static Lisp_Object Qkill_buffer_hook
;
138 static Lisp_Object Qbuffer_list_update_hook
;
140 static Lisp_Object Qget_file_buffer
;
142 static Lisp_Object Qoverlayp
;
144 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
146 static Lisp_Object Qevaporate
;
148 Lisp_Object Qmodification_hooks
;
149 Lisp_Object Qinsert_in_front_hooks
;
150 Lisp_Object Qinsert_behind_hooks
;
152 static void alloc_buffer_text (struct buffer
*, ptrdiff_t);
153 static void free_buffer_text (struct buffer
*b
);
154 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
155 static void modify_overlay (struct buffer
*, ptrdiff_t, ptrdiff_t);
156 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*, int);
158 /* For debugging; temporary. See set_buffer_internal. */
159 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
162 nsberror (Lisp_Object spec
)
165 error ("No buffer named %s", SDATA (spec
));
166 error ("Invalid buffer argument");
169 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
170 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
171 Value is nil if OBJECT is not a buffer or if it has been killed. */)
174 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
178 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
179 doc
: /* Return a list of all existing live buffers.
180 If the optional arg FRAME is a frame, we return the buffer list in the
181 proper order for that frame: the buffers show in FRAME come first,
182 followed by the rest of the buffers. */)
186 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
190 Lisp_Object framelist
, prevlist
, tail
;
194 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
195 prevlist
= Fnreverse (Fcopy_sequence
196 (XFRAME (frame
)->buried_buffer_list
));
198 /* Remove from GENERAL any buffer that duplicates one in
199 FRAMELIST or PREVLIST. */
203 general
= Fdelq (XCAR (tail
), general
);
209 general
= Fdelq (XCAR (tail
), general
);
216 return Fnconc (3, args
);
222 /* Like Fassoc, but use Fstring_equal to compare
223 (which ignores text properties),
224 and don't ever QUIT. */
227 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
229 register Lisp_Object tail
;
230 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
232 register Lisp_Object elt
, tem
;
234 tem
= Fstring_equal (Fcar (elt
), key
);
241 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
242 doc
: /* Return the buffer named BUFFER-OR-NAME.
243 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
244 is a string and there is no buffer with that name, return nil. If
245 BUFFER-OR-NAME is a buffer, return it as given. */)
246 (register Lisp_Object buffer_or_name
)
248 if (BUFFERP (buffer_or_name
))
249 return buffer_or_name
;
250 CHECK_STRING (buffer_or_name
);
252 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
255 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
256 doc
: /* Return the buffer visiting file FILENAME (a string).
257 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
258 If there is no such live buffer, return nil.
259 See also `find-buffer-visiting'. */)
260 (register Lisp_Object filename
)
262 register Lisp_Object tail
, buf
, tem
;
265 CHECK_STRING (filename
);
266 filename
= Fexpand_file_name (filename
, Qnil
);
268 /* If the file name has special constructs in it,
269 call the corresponding file handler. */
270 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
273 Lisp_Object handled_buf
= call2 (handler
, Qget_file_buffer
,
275 return BUFFERP (handled_buf
) ? handled_buf
: Qnil
;
278 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
280 buf
= Fcdr (XCAR (tail
));
281 if (!BUFFERP (buf
)) continue;
282 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
283 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
291 get_truename_buffer (register Lisp_Object filename
)
293 register Lisp_Object tail
, buf
, tem
;
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
300 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
307 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
308 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
309 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
310 return that buffer. If no such buffer exists, create a new buffer with
311 that name and return it. If BUFFER-OR-NAME starts with a space, the new
312 buffer does not keep undo information.
314 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
315 even if it is dead. The return value is never nil. */)
316 (register Lisp_Object buffer_or_name
)
318 register Lisp_Object buffer
, name
;
319 register struct buffer
*b
;
321 buffer
= Fget_buffer (buffer_or_name
);
325 if (SCHARS (buffer_or_name
) == 0)
326 error ("Empty string for buffer name is not allowed");
328 b
= allocate_buffer ();
330 /* An ordinary buffer uses its own struct buffer_text. */
331 b
->text
= &b
->own_text
;
332 b
->base_buffer
= NULL
;
333 /* No one shares the text with us now. */
336 BUF_GAP_SIZE (b
) = 20;
338 /* We allocate extra 1-byte at the tail and keep it always '\0' for
339 anchoring a search. */
340 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
342 if (! BUF_BEG_ADDR (b
))
343 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
348 b
->pt_byte
= BEG_BYTE
;
349 b
->begv_byte
= BEG_BYTE
;
350 b
->zv_byte
= BEG_BYTE
;
353 BUF_GPT_BYTE (b
) = BEG_BYTE
;
356 BUF_Z_BYTE (b
) = BEG_BYTE
;
358 BUF_CHARS_MODIFF (b
) = 1;
359 BUF_OVERLAY_MODIFF (b
) = 1;
360 BUF_SAVE_MODIFF (b
) = 1;
361 BUF_INTERVALS (b
) = 0;
362 BUF_UNCHANGED_MODIFIED (b
) = 1;
363 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
364 BUF_END_UNCHANGED (b
) = 0;
365 BUF_BEG_UNCHANGED (b
) = 0;
366 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
367 b
->text
->inhibit_shrinking
= 0;
369 b
->newline_cache
= 0;
370 b
->width_run_cache
= 0;
371 BVAR (b
, width_table
) = Qnil
;
372 b
->prevent_redisplay_optimizations_p
= 1;
374 /* Put this on the chain of all buffers including killed ones. */
375 b
->header
.next
.buffer
= all_buffers
;
378 /* An ordinary buffer normally doesn't need markers
379 to handle BEGV and ZV. */
380 BVAR (b
, pt_marker
) = Qnil
;
381 BVAR (b
, begv_marker
) = Qnil
;
382 BVAR (b
, zv_marker
) = Qnil
;
384 name
= Fcopy_sequence (buffer_or_name
);
385 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
386 BVAR (b
, name
) = name
;
388 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
391 reset_buffer_local_variables (b
, 1);
393 BVAR (b
, mark
) = Fmake_marker ();
394 BUF_MARKERS (b
) = NULL
;
396 /* Put this in the alist of all live buffers. */
397 XSETBUFFER (buffer
, b
);
398 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
399 /* And run buffer-list-update-hook. */
400 if (!NILP (Vrun_hooks
))
401 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
407 /* Return a list of overlays which is a copy of the overlay list
408 LIST, but for buffer B. */
410 static struct Lisp_Overlay
*
411 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
414 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
416 XSETBUFFER (buffer
, b
);
418 for (; list
; list
= list
->next
)
420 Lisp_Object overlay
, start
, end
, old_overlay
;
423 XSETMISC (old_overlay
, list
);
424 charpos
= marker_position (OVERLAY_START (old_overlay
));
425 start
= Fmake_marker ();
426 Fset_marker (start
, make_number (charpos
), buffer
);
427 XMARKER (start
)->insertion_type
428 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
430 charpos
= marker_position (OVERLAY_END (old_overlay
));
431 end
= Fmake_marker ();
432 Fset_marker (end
, make_number (charpos
), buffer
);
433 XMARKER (end
)->insertion_type
434 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
436 overlay
= allocate_misc ();
437 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
438 OVERLAY_START (overlay
) = start
;
439 OVERLAY_END (overlay
) = end
;
440 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
441 XOVERLAY (overlay
)->next
= NULL
;
444 tail
= tail
->next
= XOVERLAY (overlay
);
446 result
= tail
= XOVERLAY (overlay
);
453 /* Clone per-buffer values of buffer FROM.
455 Buffer TO gets the same per-buffer values as FROM, with the
456 following exceptions: (1) TO's name is left untouched, (2) markers
457 are copied and made to refer to TO, and (3) overlay lists are
461 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
465 FOR_EACH_PER_BUFFER_OBJECT_AT (offset
)
469 /* Don't touch the `name' which should be unique for every buffer. */
470 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
473 obj
= PER_BUFFER_VALUE (from
, offset
);
474 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
476 struct Lisp_Marker
*m
= XMARKER (obj
);
478 obj
= build_marker (to
, m
->charpos
, m
->bytepos
);
479 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
482 PER_BUFFER_VALUE (to
, offset
) = obj
;
485 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
487 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
488 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
490 /* Get (a copy of) the alist of Lisp-level local variables of FROM
491 and install that in TO. */
492 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
, 1);
496 /* If buffer B has markers to record PT, BEGV and ZV when it is not
497 current, update these markers. */
500 record_buffer_markers (struct buffer
*b
)
502 if (! NILP (BVAR (b
, pt_marker
)))
506 eassert (!NILP (BVAR (b
, begv_marker
)));
507 eassert (!NILP (BVAR (b
, zv_marker
)));
509 XSETBUFFER (buffer
, b
);
510 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
511 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
512 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
517 /* If buffer B has markers to record PT, BEGV and ZV when it is not
518 current, fetch these values into B->begv etc. */
521 fetch_buffer_markers (struct buffer
*b
)
523 if (! NILP (BVAR (b
, pt_marker
)))
527 eassert (!NILP (BVAR (b
, begv_marker
)));
528 eassert (!NILP (BVAR (b
, zv_marker
)));
530 m
= BVAR (b
, pt_marker
);
531 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
533 m
= BVAR (b
, begv_marker
);
534 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
536 m
= BVAR (b
, zv_marker
);
537 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
542 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
544 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
545 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
546 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
547 NAME should be a string which is not the name of an existing buffer.
548 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
549 such as major and minor modes, in the indirect buffer.
550 CLONE nil means the indirect buffer's state is reset to default values. */)
551 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
553 Lisp_Object buf
, tem
;
557 buf
= Fget_buffer (name
);
559 error ("Buffer name `%s' is in use", SDATA (name
));
562 base_buffer
= Fget_buffer (base_buffer
);
563 if (NILP (base_buffer
))
564 error ("No such buffer: `%s'", SDATA (tem
));
565 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
566 error ("Base buffer has been killed");
568 if (SCHARS (name
) == 0)
569 error ("Empty string for buffer name is not allowed");
571 b
= allocate_buffer ();
573 /* No double indirection - if base buffer is indirect,
574 new buffer becomes an indirect to base's base. */
575 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
576 ? XBUFFER (base_buffer
)->base_buffer
577 : XBUFFER (base_buffer
));
579 /* Use the base buffer's text object. */
580 b
->text
= b
->base_buffer
->text
;
581 /* We have no own text. */
582 b
->indirections
= -1;
583 /* Notify base buffer that we share the text now. */
584 b
->base_buffer
->indirections
++;
586 b
->pt
= b
->base_buffer
->pt
;
587 b
->begv
= b
->base_buffer
->begv
;
588 b
->zv
= b
->base_buffer
->zv
;
589 b
->pt_byte
= b
->base_buffer
->pt_byte
;
590 b
->begv_byte
= b
->base_buffer
->begv_byte
;
591 b
->zv_byte
= b
->base_buffer
->zv_byte
;
593 b
->newline_cache
= 0;
594 b
->width_run_cache
= 0;
595 BVAR (b
, width_table
) = Qnil
;
597 /* Put this on the chain of all buffers including killed ones. */
598 b
->header
.next
.buffer
= all_buffers
;
601 name
= Fcopy_sequence (name
);
602 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
603 BVAR (b
, name
) = name
;
606 reset_buffer_local_variables (b
, 1);
608 /* Put this in the alist of all live buffers. */
610 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
612 BVAR (b
, mark
) = Fmake_marker ();
614 /* The multibyte status belongs to the base buffer. */
615 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
617 /* Make sure the base buffer has markers for its narrowing. */
618 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
620 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
621 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
623 BVAR (b
->base_buffer
, pt_marker
)
624 = build_marker (b
->base_buffer
, b
->base_buffer
->pt
, b
->base_buffer
->pt_byte
);
626 BVAR (b
->base_buffer
, begv_marker
)
627 = build_marker (b
->base_buffer
, b
->base_buffer
->begv
, b
->base_buffer
->begv_byte
);
629 BVAR (b
->base_buffer
, zv_marker
)
630 = build_marker (b
->base_buffer
, b
->base_buffer
->zv
, b
->base_buffer
->zv_byte
);
632 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
637 /* Give the indirect buffer markers for its narrowing. */
638 BVAR (b
, pt_marker
) = build_marker (b
, b
->pt
, b
->pt_byte
);
639 BVAR (b
, begv_marker
) = build_marker (b
, b
->begv
, b
->begv_byte
);
640 BVAR (b
, zv_marker
) = build_marker (b
, b
->zv
, b
->zv_byte
);
641 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
645 struct buffer
*old_b
= current_buffer
;
647 clone_per_buffer_values (b
->base_buffer
, b
);
648 BVAR (b
, filename
) = Qnil
;
649 BVAR (b
, file_truename
) = Qnil
;
650 BVAR (b
, display_count
) = make_number (0);
651 BVAR (b
, backed_up
) = Qnil
;
652 BVAR (b
, auto_save_file_name
) = Qnil
;
653 set_buffer_internal_1 (b
);
654 Fset (intern ("buffer-save-without-query"), Qnil
);
655 Fset (intern ("buffer-file-number"), Qnil
);
656 Fset (intern ("buffer-stale-function"), Qnil
);
657 set_buffer_internal_1 (old_b
);
660 /* Run buffer-list-update-hook. */
661 if (!NILP (Vrun_hooks
))
662 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
667 /* Mark OV as no longer associated with B. */
670 drop_overlay (struct buffer
*b
, struct Lisp_Overlay
*ov
)
672 eassert (b
== XBUFFER (Fmarker_buffer (ov
->start
)));
673 modify_overlay (b
, marker_position (ov
->start
), marker_position (ov
->end
));
674 Fset_marker (ov
->start
, Qnil
, Qnil
);
675 Fset_marker (ov
->end
, Qnil
, Qnil
);
679 /* Delete all overlays of B and reset it's overlay lists. */
682 delete_all_overlays (struct buffer
*b
)
684 struct Lisp_Overlay
*ov
, *next
;
686 for (ov
= b
->overlays_before
; ov
; ov
= next
)
688 drop_overlay (b
, ov
);
693 for (ov
= b
->overlays_after
; ov
; ov
= next
)
695 drop_overlay (b
, ov
);
700 b
->overlays_before
= b
->overlays_after
= NULL
;
703 /* Reinitialize everything about a buffer except its name and contents
705 If called on an already-initialized buffer, the list of overlays
706 should be deleted before calling this function, otherwise we end up
707 with overlays that claim to belong to the buffer but the buffer
708 claims it doesn't belong to it. */
711 reset_buffer (register struct buffer
*b
)
713 BVAR (b
, filename
) = Qnil
;
714 BVAR (b
, file_truename
) = Qnil
;
715 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
716 b
->modtime
= make_emacs_time (0, UNKNOWN_MODTIME_NSECS
);
717 b
->modtime_size
= -1;
718 XSETFASTINT (BVAR (b
, save_length
), 0);
719 b
->last_window_start
= 1;
720 /* It is more conservative to start out "changed" than "unchanged". */
722 b
->prevent_redisplay_optimizations_p
= 1;
723 BVAR (b
, backed_up
) = Qnil
;
724 BUF_AUTOSAVE_MODIFF (b
) = 0;
725 b
->auto_save_failure_time
= 0;
726 BVAR (b
, auto_save_file_name
) = Qnil
;
727 BVAR (b
, read_only
) = Qnil
;
728 b
->overlays_before
= NULL
;
729 b
->overlays_after
= NULL
;
730 b
->overlay_center
= BEG
;
731 BVAR (b
, mark_active
) = Qnil
;
732 BVAR (b
, point_before_scroll
) = Qnil
;
733 BVAR (b
, file_format
) = Qnil
;
734 BVAR (b
, auto_save_file_format
) = Qt
;
735 BVAR (b
, last_selected_window
) = Qnil
;
736 XSETINT (BVAR (b
, display_count
), 0);
737 BVAR (b
, display_time
) = Qnil
;
738 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
739 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
740 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
742 b
->display_error_modiff
= 0;
745 /* Reset buffer B's local variables info.
746 Don't use this on a buffer that has already been in use;
747 it does not treat permanent locals consistently.
748 Instead, use Fkill_all_local_variables.
750 If PERMANENT_TOO is 1, then we reset permanent
751 buffer-local variables. If PERMANENT_TOO is 0,
752 we preserve those. */
755 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
760 /* Reset the major mode to Fundamental, together with all the
761 things that depend on the major mode.
762 default-major-mode is handled at a higher level.
763 We ignore it here. */
764 BVAR (b
, major_mode
) = Qfundamental_mode
;
765 BVAR (b
, keymap
) = Qnil
;
766 BVAR (b
, mode_name
) = QSFundamental
;
767 BVAR (b
, minor_modes
) = Qnil
;
769 /* If the standard case table has been altered and invalidated,
770 fix up its insides first. */
771 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
772 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
773 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
774 Fset_standard_case_table (Vascii_downcase_table
);
776 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
777 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
778 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
779 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
780 BVAR (b
, invisibility_spec
) = Qt
;
782 /* Reset all (or most) per-buffer variables to their defaults. */
784 BVAR (b
, local_var_alist
) = Qnil
;
787 Lisp_Object tmp
, prop
, last
= Qnil
;
788 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
789 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
791 /* If permanent-local, keep it. */
793 if (EQ (prop
, Qpermanent_local_hook
))
795 /* This is a partially permanent hook variable.
796 Preserve only the elements that want to be preserved. */
797 Lisp_Object list
, newlist
;
798 list
= XCDR (XCAR (tmp
));
802 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
804 Lisp_Object elt
= XCAR (list
);
805 /* Preserve element ELT if it's t,
806 if it is a function with a `permanent-local-hook' property,
807 or if it's not a symbol. */
810 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
811 newlist
= Fcons (elt
, newlist
);
813 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
816 /* Delete this local variable. */
817 else if (NILP (last
))
818 BVAR (b
, local_var_alist
) = XCDR (tmp
);
820 XSETCDR (last
, XCDR (tmp
));
823 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
824 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
825 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
827 /* For each slot that has a default value, copy that into the slot. */
828 FOR_EACH_PER_BUFFER_OBJECT_AT (offset
)
830 int idx
= PER_BUFFER_IDX (offset
);
833 || buffer_permanent_local_flags
[idx
] == 0)))
834 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
838 /* We split this away from generate-new-buffer, because rename-buffer
839 and set-visited-file-name ought to be able to use this to really
840 rename the buffer properly. */
842 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
843 Sgenerate_new_buffer_name
, 1, 2, 0,
844 doc
: /* Return a string that is the name of no existing buffer based on NAME.
845 If there is no live buffer named NAME, then return NAME.
846 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
847 \(starting at 2) until an unused name is found, and then return that name.
848 Optional second argument IGNORE specifies a name that is okay to use (if
849 it is in the sequence to be tried) even if a buffer with that name exists.
851 If NAME begins with a space (i.e., a buffer that is not normally
852 visible to users), then if buffer NAME already exists a random number
853 is first appended to NAME, to speed up finding a non-existent buffer. */)
854 (register Lisp_Object name
, Lisp_Object ignore
)
856 register Lisp_Object gentemp
, tem
, tem2
;
858 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
862 tem
= Fstring_equal (name
, ignore
);
865 tem
= Fget_buffer (name
);
869 if (!strncmp (SSDATA (name
), " ", 1)) /* see bug#1229 */
871 /* Note fileio.c:make_temp_name does random differently. */
872 tem2
= concat2 (name
, make_formatted_string
874 XFASTINT (Frandom (make_number (999999)))));
875 tem
= Fget_buffer (tem2
);
885 gentemp
= concat2 (tem2
, make_formatted_string
886 (number
, "<%"pD
"d>", ++count
));
887 tem
= Fstring_equal (gentemp
, ignore
);
890 tem
= Fget_buffer (gentemp
);
897 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
898 doc
: /* Return the name of BUFFER, as a string.
899 BUFFER defaults to the current buffer.
900 Return nil if BUFFER has been killed. */)
901 (register Lisp_Object buffer
)
904 return BVAR (current_buffer
, name
);
905 CHECK_BUFFER (buffer
);
906 return BVAR (XBUFFER (buffer
), name
);
909 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
910 doc
: /* Return name of file BUFFER is visiting, or nil if none.
911 No argument or nil as argument means use the current buffer. */)
912 (register Lisp_Object buffer
)
915 return BVAR (current_buffer
, filename
);
916 CHECK_BUFFER (buffer
);
917 return BVAR (XBUFFER (buffer
), filename
);
920 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
922 doc
: /* Return the base buffer of indirect buffer BUFFER.
923 If BUFFER is not indirect, return nil.
924 BUFFER defaults to the current buffer. */)
925 (register Lisp_Object buffer
)
928 Lisp_Object base_buffer
;
931 base
= current_buffer
->base_buffer
;
934 CHECK_BUFFER (buffer
);
935 base
= XBUFFER (buffer
)->base_buffer
;
940 XSETBUFFER (base_buffer
, base
);
944 DEFUN ("buffer-local-value", Fbuffer_local_value
,
945 Sbuffer_local_value
, 2, 2, 0,
946 doc
: /* Return the value of VARIABLE in BUFFER.
947 If VARIABLE does not have a buffer-local binding in BUFFER, the value
948 is the default binding of the variable. */)
949 (register Lisp_Object variable
, register Lisp_Object buffer
)
951 register Lisp_Object result
= buffer_local_value_1 (variable
, buffer
);
953 if (EQ (result
, Qunbound
))
954 xsignal1 (Qvoid_variable
, variable
);
960 /* Like Fbuffer_local_value, but return Qunbound if the variable is
964 buffer_local_value_1 (Lisp_Object variable
, Lisp_Object buffer
)
966 register struct buffer
*buf
;
967 register Lisp_Object result
;
968 struct Lisp_Symbol
*sym
;
970 CHECK_SYMBOL (variable
);
971 CHECK_BUFFER (buffer
);
972 buf
= XBUFFER (buffer
);
973 sym
= XSYMBOL (variable
);
976 switch (sym
->redirect
)
978 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
979 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
980 case SYMBOL_LOCALIZED
:
981 { /* Look in local_var_alist. */
982 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
983 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
984 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
988 { /* What binding is loaded right now? */
989 Lisp_Object current_alist_element
= blv
->valcell
;
991 /* The value of the currently loaded binding is not
992 stored in it, but rather in the realvalue slot.
993 Store that value into the binding it belongs to
994 in case that is the one we are about to use. */
996 XSETCDR (current_alist_element
,
997 do_symval_forwarding (blv
->fwd
));
999 /* Now get the (perhaps updated) value out of the binding. */
1000 result
= XCDR (result
);
1003 result
= Fdefault_value (variable
);
1006 case SYMBOL_FORWARDED
:
1008 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
1009 if (BUFFER_OBJFWDP (fwd
))
1010 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
1012 result
= Fdefault_value (variable
);
1021 /* Return an alist of the Lisp-level buffer-local bindings of
1022 buffer BUF. That is, don't include the variables maintained
1023 in special slots in the buffer object.
1024 If CLONE is zero elements of the form (VAR . unbound) are replaced
1028 buffer_lisp_local_variables (struct buffer
*buf
, int clone
)
1030 Lisp_Object result
= Qnil
;
1031 register Lisp_Object tail
;
1032 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1034 Lisp_Object val
, elt
;
1038 /* Reference each variable in the alist in buf.
1039 If inquiring about the current buffer, this gets the current values,
1040 so store them into the alist so the alist is up to date.
1041 If inquiring about some other buffer, this swaps out any values
1042 for that buffer, making the alist up to date automatically. */
1043 val
= find_symbol_value (XCAR (elt
));
1044 /* Use the current buffer value only if buf is the current buffer. */
1045 if (buf
!= current_buffer
)
1048 result
= Fcons (!clone
&& EQ (val
, Qunbound
)
1050 : Fcons (XCAR (elt
), val
),
1057 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1058 Sbuffer_local_variables
, 0, 1, 0,
1059 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1060 Most elements look like (SYMBOL . VALUE), describing one variable.
1061 For a symbol that is locally unbound, just the symbol appears in the value.
1062 Note that storing new VALUEs in these elements doesn't change the variables.
1063 No argument or nil as argument means use current buffer as BUFFER. */)
1064 (register Lisp_Object buffer
)
1066 register struct buffer
*buf
;
1067 register Lisp_Object result
;
1070 buf
= current_buffer
;
1073 CHECK_BUFFER (buffer
);
1074 buf
= XBUFFER (buffer
);
1077 result
= buffer_lisp_local_variables (buf
, 0);
1079 /* Add on all the variables stored in special slots. */
1083 FOR_EACH_PER_BUFFER_OBJECT_AT (offset
)
1085 idx
= PER_BUFFER_IDX (offset
);
1086 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1087 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1089 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1090 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1091 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1100 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1102 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1103 No argument or nil as argument means use current buffer as BUFFER. */)
1104 (register Lisp_Object buffer
)
1106 register struct buffer
*buf
;
1108 buf
= current_buffer
;
1111 CHECK_BUFFER (buffer
);
1112 buf
= XBUFFER (buffer
);
1115 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1118 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1120 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1121 A non-nil FLAG means mark the buffer modified. */)
1122 (register Lisp_Object flag
)
1124 register int already
;
1125 register Lisp_Object fn
;
1126 Lisp_Object buffer
, window
;
1128 #ifdef CLASH_DETECTION
1129 /* If buffer becoming modified, lock the file.
1130 If buffer becoming unmodified, unlock the file. */
1132 fn
= BVAR (current_buffer
, file_truename
);
1133 /* Test buffer-file-name so that binding it to nil is effective. */
1134 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1136 already
= SAVE_MODIFF
< MODIFF
;
1137 if (!already
&& !NILP (flag
))
1139 else if (already
&& NILP (flag
))
1142 #endif /* CLASH_DETECTION */
1144 /* Here we have a problem. SAVE_MODIFF is used here to encode
1145 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1146 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1147 modify SAVE_MODIFF to affect one, we may affect the other
1149 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1150 if SAVE_MODIFF<auto_save_modified that means we risk changing
1151 recent-auto-save-p from t to nil.
1152 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1153 we risk changing recent-auto-save-p from nil to t. */
1154 SAVE_MODIFF
= (NILP (flag
)
1155 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1157 /* Let's try to preserve recent-auto-save-p. */
1158 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1159 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1160 we can either decrease SAVE_MODIFF and auto_save_modified
1161 or increase MODIFF. */
1164 /* Set update_mode_lines only if buffer is displayed in some window.
1165 Packages like jit-lock or lazy-lock preserve a buffer's modified
1166 state by recording/restoring the state around blocks of code.
1167 Setting update_mode_lines makes redisplay consider all windows
1168 (on all frames). Stealth fontification of buffers not displayed
1169 would incur additional redisplay costs if we'd set
1170 update_modes_lines unconditionally.
1172 Ideally, I think there should be another mechanism for fontifying
1173 buffers without "modifying" buffers, or redisplay should be
1174 smarter about updating the `*' in mode lines. --gerd */
1175 XSETBUFFER (buffer
, current_buffer
);
1176 window
= Fget_buffer_window (buffer
, Qt
);
1177 if (WINDOWP (window
))
1179 ++update_mode_lines
;
1180 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1186 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1187 Srestore_buffer_modified_p
, 1, 1, 0,
1188 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1189 It is not ensured that mode lines will be updated to show the modified
1190 state of the current buffer. Use with care. */)
1193 #ifdef CLASH_DETECTION
1196 /* If buffer becoming modified, lock the file.
1197 If buffer becoming unmodified, unlock the file. */
1199 fn
= BVAR (current_buffer
, file_truename
);
1200 /* Test buffer-file-name so that binding it to nil is effective. */
1201 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1203 int already
= SAVE_MODIFF
< MODIFF
;
1204 if (!already
&& !NILP (flag
))
1206 else if (already
&& NILP (flag
))
1209 #endif /* CLASH_DETECTION */
1211 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1215 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1217 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1218 Each buffer has a tick counter which is incremented each time the
1219 text in that buffer is changed. It wraps around occasionally.
1220 No argument or nil as argument means use current buffer as BUFFER. */)
1221 (register Lisp_Object buffer
)
1223 register struct buffer
*buf
;
1225 buf
= current_buffer
;
1228 CHECK_BUFFER (buffer
);
1229 buf
= XBUFFER (buffer
);
1232 return make_number (BUF_MODIFF (buf
));
1235 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1236 Sbuffer_chars_modified_tick
, 0, 1, 0,
1237 doc
: /* Return BUFFER's character-change tick counter.
1238 Each buffer has a character-change tick counter, which is set to the
1239 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1240 time text in that buffer is inserted or deleted. By comparing the
1241 values returned by two individual calls of `buffer-chars-modified-tick',
1242 you can tell whether a character change occurred in that buffer in
1243 between these calls. No argument or nil as argument means use current
1244 buffer as BUFFER. */)
1245 (register Lisp_Object buffer
)
1247 register struct buffer
*buf
;
1249 buf
= current_buffer
;
1252 CHECK_BUFFER (buffer
);
1253 buf
= XBUFFER (buffer
);
1256 return make_number (BUF_CHARS_MODIFF (buf
));
1259 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1260 "(list (read-string \"Rename buffer (to new name): \" \
1261 nil 'buffer-name-history (buffer-name (current-buffer))) \
1262 current-prefix-arg)",
1263 doc
: /* Change current buffer's name to NEWNAME (a string).
1264 If second arg UNIQUE is nil or omitted, it is an error if a
1265 buffer named NEWNAME already exists.
1266 If UNIQUE is non-nil, come up with a new name using
1267 `generate-new-buffer-name'.
1268 Interactively, you can set UNIQUE with a prefix argument.
1269 We return the name we actually gave the buffer.
1270 This does not change the name of the visited file (if any). */)
1271 (register Lisp_Object newname
, Lisp_Object unique
)
1273 register Lisp_Object tem
, buf
;
1275 CHECK_STRING (newname
);
1277 if (SCHARS (newname
) == 0)
1278 error ("Empty string is invalid as a buffer name");
1280 tem
= Fget_buffer (newname
);
1283 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1284 rename the buffer automatically so you can create another
1285 with the original name. It makes UNIQUE equivalent to
1286 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1287 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1288 return BVAR (current_buffer
, name
);
1290 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1292 error ("Buffer name `%s' is in use", SDATA (newname
));
1295 BVAR (current_buffer
, name
) = newname
;
1297 /* Catch redisplay's attention. Unless we do this, the mode lines for
1298 any windows displaying current_buffer will stay unchanged. */
1299 update_mode_lines
++;
1301 XSETBUFFER (buf
, current_buffer
);
1302 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1303 if (NILP (BVAR (current_buffer
, filename
))
1304 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1305 call0 (intern ("rename-auto-save-file"));
1307 /* Run buffer-list-update-hook. */
1308 if (!NILP (Vrun_hooks
))
1309 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1311 /* Refetch since that last call may have done GC. */
1312 return BVAR (current_buffer
, name
);
1315 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1316 doc
: /* Return most recently selected buffer other than BUFFER.
1317 Buffers not visible in windows are preferred to visible buffers, unless
1318 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1319 BUFFER unless it denotes a live buffer. If the optional third argument
1320 FRAME is non-nil, use that frame's buffer list instead of the selected
1321 frame's buffer list.
1323 The buffer is found by scanning the selected or specified frame's buffer
1324 list first, followed by the list of all buffers. If no other buffer
1325 exists, return the buffer `*scratch*' (creating it if necessary). */)
1326 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1328 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1329 Lisp_Object tail
, buf
, pred
;
1330 Lisp_Object notsogood
= Qnil
;
1333 frame
= selected_frame
;
1335 CHECK_FRAME (frame
);
1337 pred
= frame_buffer_predicate (frame
);
1338 /* Consider buffers that have been seen in the frame first. */
1339 tail
= XFRAME (frame
)->buffer_list
;
1340 for (; CONSP (tail
); tail
= XCDR (tail
))
1343 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1344 && !NILP (BVAR (XBUFFER (buf
), name
))
1345 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1346 /* If the frame has a buffer_predicate, disregard buffers that
1347 don't fit the predicate. */
1348 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1350 if (!NILP (visible_ok
)
1351 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1353 else if (NILP (notsogood
))
1358 /* Consider alist of all buffers next. */
1359 tail
= Vbuffer_alist
;
1360 for (; CONSP (tail
); tail
= XCDR (tail
))
1362 buf
= Fcdr (XCAR (tail
));
1363 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1364 && !NILP (BVAR (XBUFFER (buf
), name
))
1365 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1366 /* If the frame has a buffer_predicate, disregard buffers that
1367 don't fit the predicate. */
1368 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1370 if (!NILP (visible_ok
)
1371 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1373 else if (NILP (notsogood
))
1378 if (!NILP (notsogood
))
1382 buf
= Fget_buffer (build_string ("*scratch*"));
1385 buf
= Fget_buffer_create (build_string ("*scratch*"));
1386 Fset_buffer_major_mode (buf
);
1392 /* The following function is a safe variant of Fother_buffer: It doesn't
1393 pay attention to any frame-local buffer lists, doesn't care about
1394 visibility of buffers, and doesn't evaluate any frame predicates. */
1397 other_buffer_safely (Lisp_Object buffer
)
1399 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1400 Lisp_Object tail
, buf
;
1402 tail
= Vbuffer_alist
;
1403 for (; CONSP (tail
); tail
= XCDR (tail
))
1405 buf
= Fcdr (XCAR (tail
));
1406 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1407 && !NILP (BVAR (XBUFFER (buf
), name
))
1408 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1412 buf
= Fget_buffer (build_string ("*scratch*"));
1415 buf
= Fget_buffer_create (build_string ("*scratch*"));
1416 Fset_buffer_major_mode (buf
);
1422 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1424 doc
: /* Start keeping undo information for buffer BUFFER.
1425 No argument or nil as argument means do this for the current buffer. */)
1426 (register Lisp_Object buffer
)
1428 Lisp_Object real_buffer
;
1431 XSETBUFFER (real_buffer
, current_buffer
);
1434 real_buffer
= Fget_buffer (buffer
);
1435 if (NILP (real_buffer
))
1439 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1440 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1445 /* Truncate undo list and shrink the gap of BUFFER. */
1448 compact_buffer (struct buffer
*buffer
)
1450 /* Verify indirection counters. */
1451 if (buffer
->base_buffer
)
1453 eassert (buffer
->indirections
== -1);
1454 eassert (buffer
->base_buffer
->indirections
> 0);
1457 eassert (buffer
->indirections
>= 0);
1459 /* Skip dead buffers, indirect buffers and buffers
1460 which aren't changed since last compaction. */
1461 if (!NILP (buffer
->BUFFER_INTERNAL_FIELD (name
))
1462 && (buffer
->base_buffer
== NULL
)
1463 && (buffer
->text
->compact
!= buffer
->text
->modiff
))
1465 /* If a buffer's undo list is Qt, that means that undo is
1466 turned off in that buffer. Calling truncate_undo_list on
1467 Qt tends to return NULL, which effectively turns undo back on.
1468 So don't call truncate_undo_list if undo_list is Qt. */
1469 if (!EQ (buffer
->BUFFER_INTERNAL_FIELD (undo_list
), Qt
))
1470 truncate_undo_list (buffer
);
1472 /* Shrink buffer gaps. */
1473 if (!buffer
->text
->inhibit_shrinking
)
1475 /* If a buffer's gap size is more than 10% of the buffer
1476 size, or larger than 2000 bytes, then shrink it
1477 accordingly. Keep a minimum size of 20 bytes. */
1478 int size
= min (2000, max (20, (buffer
->text
->z_byte
/ 10)));
1480 if (buffer
->text
->gap_size
> size
)
1482 struct buffer
*save_current
= current_buffer
;
1483 current_buffer
= buffer
;
1484 make_gap (-(buffer
->text
->gap_size
- size
));
1485 current_buffer
= save_current
;
1488 buffer
->text
->compact
= buffer
->text
->modiff
;
1494 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1495 doc
: /* Kill the buffer specified by BUFFER-OR-NAME.
1496 The argument may be a buffer or the name of an existing buffer.
1497 Argument nil or omitted means kill the current buffer. Return t if the
1498 buffer is actually killed, nil otherwise.
1500 The functions in `kill-buffer-query-functions' are called with the
1501 buffer to be killed as the current buffer. If any of them returns nil,
1502 the buffer is not killed. The hook `kill-buffer-hook' is run before the
1503 buffer is actually killed. The buffer being killed will be current
1504 while the hook is running. Functions called by any of these hooks are
1505 supposed to not change the current buffer.
1507 Any processes that have this buffer as the `process-buffer' are killed
1508 with SIGHUP. This function calls `replace-buffer-in-windows' for
1509 cleaning up all windows currently displaying the buffer to be killed. */)
1510 (Lisp_Object buffer_or_name
)
1513 register struct buffer
*b
;
1514 register Lisp_Object tem
;
1515 register struct Lisp_Marker
*m
;
1516 struct gcpro gcpro1
;
1518 if (NILP (buffer_or_name
))
1519 buffer
= Fcurrent_buffer ();
1521 buffer
= Fget_buffer (buffer_or_name
);
1523 nsberror (buffer_or_name
);
1525 b
= XBUFFER (buffer
);
1527 /* Avoid trouble for buffer already dead. */
1528 if (NILP (BVAR (b
, name
)))
1531 /* Query if the buffer is still modified. */
1532 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1533 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1536 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1537 BVAR (b
, name
), make_number (0)));
1543 /* Run hooks with the buffer to be killed the current buffer. */
1545 ptrdiff_t count
= SPECPDL_INDEX ();
1546 Lisp_Object arglist
[1];
1548 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1549 set_buffer_internal (b
);
1551 /* First run the query functions; if any query is answered no,
1552 don't kill the buffer. */
1553 arglist
[0] = Qkill_buffer_query_functions
;
1554 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1556 return unbind_to (count
, Qnil
);
1558 /* Then run the hooks. */
1559 Frun_hooks (1, &Qkill_buffer_hook
);
1560 unbind_to (count
, Qnil
);
1563 /* If the hooks have killed the buffer, exit now. */
1564 if (NILP (BVAR (b
, name
)))
1567 /* We have no more questions to ask. Verify that it is valid
1568 to kill the buffer. This must be done after the questions
1569 since anything can happen within do_yes_or_no_p. */
1571 /* Don't kill the minibuffer now current. */
1572 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1575 /* Notify our base buffer that we don't share the text anymore. */
1578 eassert (b
->indirections
== -1);
1579 b
->base_buffer
->indirections
--;
1580 eassert (b
->base_buffer
->indirections
>= 0);
1583 /* When we kill an ordinary buffer which shares it's buffer text
1584 with indirect buffer(s), we must kill indirect buffer(s) too.
1585 We do it at this stage so nothing terrible happens if they
1586 ask questions or their hooks get errors. */
1587 if (!b
->base_buffer
&& b
->indirections
> 0)
1589 struct buffer
*other
;
1593 FOR_EACH_BUFFER (other
)
1594 if (other
->base_buffer
== b
)
1597 XSETBUFFER (buf
, other
);
1603 /* Exit if we now have killed the base buffer (Bug#11665). */
1604 if (NILP (BVAR (b
, name
)))
1608 /* Run replace_buffer_in_windows before making another buffer current
1609 since set-window-buffer-start-and-point will refuse to make another
1610 buffer current if the selected window does not show the current
1611 buffer. (Bug#10114) */
1612 replace_buffer_in_windows (buffer
);
1614 /* Exit if replacing the buffer in windows has killed our buffer. */
1615 if (NILP (BVAR (b
, name
)))
1618 /* Make this buffer not be current. Exit if it is the sole visible
1620 if (b
== current_buffer
)
1622 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1624 if (b
== current_buffer
)
1628 /* If the buffer now current is shown in the minibuffer and our buffer
1629 is the sole other buffer give up. */
1630 XSETBUFFER (tem
, current_buffer
);
1631 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
)
1632 && EQ (buffer
, Fother_buffer (buffer
, Qnil
, Qnil
)))
1635 /* Now there is no question: we can kill the buffer. */
1637 #ifdef CLASH_DETECTION
1638 /* Unlock this buffer's file, if it is locked. */
1640 #endif /* CLASH_DETECTION */
1643 kill_buffer_processes (buffer
);
1646 /* Killing buffer processes may run sentinels which may have killed
1648 if (NILP (BVAR (b
, name
)))
1651 /* These may run Lisp code and into infinite loops (if someone
1652 insisted on circular lists) so allow quitting here. */
1653 frames_discard_buffer (buffer
);
1655 clear_charpos_cache (b
);
1657 tem
= Vinhibit_quit
;
1659 /* Remove the buffer from the list of all buffers. */
1660 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1661 /* If replace_buffer_in_windows didn't do its job fix that now. */
1662 replace_buffer_in_windows_safely (buffer
);
1663 Vinhibit_quit
= tem
;
1665 /* Delete any auto-save file, if we saved it in this session.
1666 But not if the buffer is modified. */
1667 if (STRINGP (BVAR (b
, auto_save_file_name
))
1668 && BUF_AUTOSAVE_MODIFF (b
) != 0
1669 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1670 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1671 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1674 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1675 if (! NILP (delete))
1676 internal_delete_file (BVAR (b
, auto_save_file_name
));
1679 /* Deleting an auto-save file could have killed our buffer. */
1680 if (NILP (BVAR (b
, name
)))
1685 /* Unchain all markers that belong to this indirect buffer.
1686 Don't unchain the markers that belong to the base buffer
1687 or its other indirect buffers. */
1688 for (m
= BUF_MARKERS (b
); m
; )
1690 struct Lisp_Marker
*next
= m
->next
;
1698 /* Unchain all markers of this buffer and its indirect buffers.
1699 and leave them pointing nowhere. */
1700 for (m
= BUF_MARKERS (b
); m
; )
1702 struct Lisp_Marker
*next
= m
->next
;
1707 BUF_MARKERS (b
) = NULL
;
1708 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1710 /* Perhaps we should explicitly free the interval tree here... */
1713 /* Reset the local variables, so that this buffer's local values
1714 won't be protected from GC. They would be protected
1715 if they happened to remain cached in their symbols.
1716 This gets rid of them for certain. */
1717 swap_out_buffer_local_variables (b
);
1718 reset_buffer_local_variables (b
, 1);
1720 BVAR (b
, name
) = Qnil
;
1723 if (! b
->base_buffer
)
1724 free_buffer_text (b
);
1726 if (b
->newline_cache
)
1728 free_region_cache (b
->newline_cache
);
1729 b
->newline_cache
= 0;
1731 if (b
->width_run_cache
)
1733 free_region_cache (b
->width_run_cache
);
1734 b
->width_run_cache
= 0;
1736 BVAR (b
, width_table
) = Qnil
;
1738 BVAR (b
, undo_list
) = Qnil
;
1740 /* Run buffer-list-update-hook. */
1741 if (!NILP (Vrun_hooks
))
1742 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1747 /* Move association for BUFFER to the front of buffer (a)lists. Since
1748 we do this each time BUFFER is selected visibly, the more recently
1749 selected buffers are always closer to the front of those lists. This
1750 means that other_buffer is more likely to choose a relevant buffer.
1752 Note that this moves BUFFER to the front of the buffer lists of the
1753 selected frame even if BUFFER is not shown there. If BUFFER is not
1754 shown in the selected frame, consider the present behavior a feature.
1755 `select-window' gets this right since it shows BUFFER in the selected
1756 window when calling us. */
1759 record_buffer (Lisp_Object buffer
)
1761 Lisp_Object aelt
, aelt_cons
, tem
;
1762 register struct frame
*f
= XFRAME (selected_frame
);
1764 CHECK_BUFFER (buffer
);
1766 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1767 Don't allow quitting since this might leave the buffer list in an
1768 inconsistent state. */
1769 tem
= Vinhibit_quit
;
1771 aelt
= Frassq (buffer
, Vbuffer_alist
);
1772 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1773 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1774 XSETCDR (aelt_cons
, Vbuffer_alist
);
1775 Vbuffer_alist
= aelt_cons
;
1776 Vinhibit_quit
= tem
;
1778 /* Update buffer list of selected frame. */
1779 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1780 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1782 /* Run buffer-list-update-hook. */
1783 if (!NILP (Vrun_hooks
))
1784 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1788 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1789 buffer is killed. For the selected frame's buffer list this moves
1790 BUFFER to its end even if it was never shown in that frame. If
1791 this happens we have a feature, hence `bury-buffer-internal' should be
1792 called only when BUFFER was shown in the selected frame. */
1794 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1796 doc
: /* Move BUFFER to the end of the buffer list. */)
1797 (Lisp_Object buffer
)
1799 Lisp_Object aelt
, aelt_cons
, tem
;
1800 register struct frame
*f
= XFRAME (selected_frame
);
1802 CHECK_BUFFER (buffer
);
1804 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1805 Don't allow quitting since this might leave the buffer list in an
1806 inconsistent state. */
1807 tem
= Vinhibit_quit
;
1809 aelt
= Frassq (buffer
, Vbuffer_alist
);
1810 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1811 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1812 XSETCDR (aelt_cons
, Qnil
);
1813 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1814 Vinhibit_quit
= tem
;
1816 /* Update buffer lists of selected frame. */
1817 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1818 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1820 /* Run buffer-list-update-hook. */
1821 if (!NILP (Vrun_hooks
))
1822 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1827 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1828 doc
: /* Set an appropriate major mode for BUFFER.
1829 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1830 according to `default-major-mode'.
1831 Use this function before selecting the buffer, since it may need to inspect
1832 the current buffer's major mode. */)
1833 (Lisp_Object buffer
)
1836 Lisp_Object function
;
1838 CHECK_BUFFER (buffer
);
1840 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1841 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1842 function
= find_symbol_value (intern ("initial-major-mode"));
1845 function
= BVAR (&buffer_defaults
, major_mode
);
1847 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1848 function
= BVAR (current_buffer
, major_mode
);
1851 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1854 count
= SPECPDL_INDEX ();
1856 /* To select a nonfundamental mode,
1857 select the buffer temporarily and then call the mode function. */
1859 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1861 Fset_buffer (buffer
);
1864 return unbind_to (count
, Qnil
);
1867 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1868 doc
: /* Return the current buffer as a Lisp object. */)
1871 register Lisp_Object buf
;
1872 XSETBUFFER (buf
, current_buffer
);
1876 /* Set the current buffer to B.
1878 We previously set windows_or_buffers_changed here to invalidate
1879 global unchanged information in beg_unchanged and end_unchanged.
1880 This is no longer necessary because we now compute unchanged
1881 information on a buffer-basis. Every action affecting other
1882 windows than the selected one requires a select_window at some
1883 time, and that increments windows_or_buffers_changed. */
1886 set_buffer_internal (register struct buffer
*b
)
1888 if (current_buffer
!= b
)
1889 set_buffer_internal_1 (b
);
1892 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1893 This is used by redisplay. */
1896 set_buffer_internal_1 (register struct buffer
*b
)
1898 register struct buffer
*old_buf
;
1899 register Lisp_Object tail
;
1901 #ifdef USE_MMAP_FOR_BUFFERS
1902 if (b
->text
->beg
== NULL
)
1903 enlarge_buffer_text (b
, 0);
1904 #endif /* USE_MMAP_FOR_BUFFERS */
1906 if (current_buffer
== b
)
1909 old_buf
= current_buffer
;
1911 last_known_column_point
= -1; /* invalidate indentation cache */
1915 /* Put the undo list back in the base buffer, so that it appears
1916 that an indirect buffer shares the undo list of its base. */
1917 if (old_buf
->base_buffer
)
1918 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1920 /* If the old current buffer has markers to record PT, BEGV and ZV
1921 when it is not current, update them now. */
1922 record_buffer_markers (old_buf
);
1925 /* Get the undo list from the base buffer, so that it appears
1926 that an indirect buffer shares the undo list of its base. */
1928 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1930 /* If the new current buffer has markers to record PT, BEGV and ZV
1931 when it is not current, fetch them now. */
1932 fetch_buffer_markers (b
);
1934 /* Look down buffer's list of local Lisp variables
1935 to find and update any that forward into C variables. */
1939 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1941 Lisp_Object var
= XCAR (XCAR (tail
));
1942 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1943 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1944 && SYMBOL_BLV (sym
)->fwd
)
1945 /* Just reference the variable
1946 to cause it to become set for this buffer. */
1947 Fsymbol_value (var
);
1950 /* Do the same with any others that were local to the previous buffer */
1951 while (b
!= old_buf
&& (b
= old_buf
, b
));
1954 /* Switch to buffer B temporarily for redisplay purposes.
1955 This avoids certain things that don't need to be done within redisplay. */
1958 set_buffer_temp (struct buffer
*b
)
1960 register struct buffer
*old_buf
;
1962 if (current_buffer
== b
)
1965 old_buf
= current_buffer
;
1968 /* If the old current buffer has markers to record PT, BEGV and ZV
1969 when it is not current, update them now. */
1970 record_buffer_markers (old_buf
);
1972 /* If the new current buffer has markers to record PT, BEGV and ZV
1973 when it is not current, fetch them now. */
1974 fetch_buffer_markers (b
);
1977 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1978 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1979 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1980 also `save-excursion' when you want to make a buffer current
1981 temporarily. This function does not display the buffer, so its effect
1982 ends when the current command terminates. Use `switch-to-buffer' or
1983 `pop-to-buffer' to switch buffers permanently. */)
1984 (register Lisp_Object buffer_or_name
)
1986 register Lisp_Object buffer
;
1987 buffer
= Fget_buffer (buffer_or_name
);
1989 nsberror (buffer_or_name
);
1990 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1991 error ("Selecting deleted buffer");
1992 set_buffer_internal (XBUFFER (buffer
));
1996 /* Set the current buffer to BUFFER provided it is alive. */
1999 set_buffer_if_live (Lisp_Object buffer
)
2001 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
2002 Fset_buffer (buffer
);
2006 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
2007 Sbarf_if_buffer_read_only
, 0, 0, 0,
2008 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
2011 if (!NILP (BVAR (current_buffer
, read_only
))
2012 && NILP (Vinhibit_read_only
))
2013 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
2017 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2018 doc
: /* Delete the entire contents of the current buffer.
2019 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2020 so the buffer is truly empty after this. */)
2027 current_buffer
->last_window_start
= 1;
2028 /* Prevent warnings, or suspension of auto saving, that would happen
2029 if future size is less than past size. Use of erase-buffer
2030 implies that the future text is not really related to the past text. */
2031 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
2036 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
2038 CHECK_NUMBER_COERCE_MARKER (*b
);
2039 CHECK_NUMBER_COERCE_MARKER (*e
);
2041 if (XINT (*b
) > XINT (*e
))
2044 tem
= *b
; *b
= *e
; *e
= tem
;
2047 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
2048 args_out_of_range (*b
, *e
);
2051 /* Advance BYTE_POS up to a character boundary
2052 and return the adjusted position. */
2055 advance_to_char_boundary (ptrdiff_t byte_pos
)
2059 if (byte_pos
== BEG
)
2060 /* Beginning of buffer is always a character boundary. */
2063 c
= FETCH_BYTE (byte_pos
);
2064 if (! CHAR_HEAD_P (c
))
2066 /* We should advance BYTE_POS only when C is a constituent of a
2067 multibyte sequence. */
2068 ptrdiff_t orig_byte_pos
= byte_pos
;
2073 c
= FETCH_BYTE (byte_pos
);
2075 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2077 if (byte_pos
< orig_byte_pos
)
2078 byte_pos
= orig_byte_pos
;
2079 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2080 surely advance to the correct character boundary. If C is
2081 not, BYTE_POS was unchanged. */
2087 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2089 doc
: /* Swap the text between current buffer and BUFFER. */)
2090 (Lisp_Object buffer
)
2092 struct buffer
*other_buffer
;
2093 CHECK_BUFFER (buffer
);
2094 other_buffer
= XBUFFER (buffer
);
2096 if (NILP (BVAR (other_buffer
, name
)))
2097 error ("Cannot swap a dead buffer's text");
2099 /* Actually, it probably works just fine.
2100 * if (other_buffer == current_buffer)
2101 * error ("Cannot swap a buffer's text with itself"); */
2103 /* Actually, this may be workable as well, tho probably only if they're
2105 if (other_buffer
->base_buffer
2106 || current_buffer
->base_buffer
)
2107 error ("Cannot swap indirect buffers's text");
2109 { /* This is probably harder to make work. */
2110 struct buffer
*other
;
2111 FOR_EACH_BUFFER (other
)
2112 if (other
->base_buffer
== other_buffer
2113 || other
->base_buffer
== current_buffer
)
2114 error ("One of the buffers to swap has indirect buffers");
2117 #define swapfield(field, type) \
2119 type tmp##field = other_buffer->field; \
2120 other_buffer->field = current_buffer->field; \
2121 current_buffer->field = tmp##field; \
2123 #define swapfield_(field, type) \
2125 type tmp##field = BVAR (other_buffer, field); \
2126 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2127 BVAR (current_buffer, field) = tmp##field; \
2130 swapfield (own_text
, struct buffer_text
);
2131 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2132 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2134 r_alloc_reset_variable ((void **) ¤t_buffer
->own_text
.beg
,
2135 (void **) &other_buffer
->own_text
.beg
);
2136 r_alloc_reset_variable ((void **) &other_buffer
->own_text
.beg
,
2137 (void **) ¤t_buffer
->own_text
.beg
);
2138 #endif /* REL_ALLOC */
2140 swapfield (pt
, ptrdiff_t);
2141 swapfield (pt_byte
, ptrdiff_t);
2142 swapfield (begv
, ptrdiff_t);
2143 swapfield (begv_byte
, ptrdiff_t);
2144 swapfield (zv
, ptrdiff_t);
2145 swapfield (zv_byte
, ptrdiff_t);
2146 eassert (!current_buffer
->base_buffer
);
2147 eassert (!other_buffer
->base_buffer
);
2148 swapfield (indirections
, ptrdiff_t);
2149 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2150 swapfield (newline_cache
, struct region_cache
*);
2151 swapfield (width_run_cache
, struct region_cache
*);
2152 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2153 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2154 swapfield (overlays_before
, struct Lisp_Overlay
*);
2155 swapfield (overlays_after
, struct Lisp_Overlay
*);
2156 swapfield (overlay_center
, ptrdiff_t);
2157 swapfield_ (undo_list
, Lisp_Object
);
2158 swapfield_ (mark
, Lisp_Object
);
2159 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2160 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2161 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2162 /* FIXME: Not sure what we should do with these *_marker fields.
2163 Hopefully they're just nil anyway. */
2164 swapfield_ (pt_marker
, Lisp_Object
);
2165 swapfield_ (begv_marker
, Lisp_Object
);
2166 swapfield_ (zv_marker
, Lisp_Object
);
2167 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2168 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2170 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2171 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2172 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2173 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2174 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2175 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2176 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2178 struct Lisp_Marker
*m
;
2179 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2180 if (m
->buffer
== other_buffer
)
2181 m
->buffer
= current_buffer
;
2183 /* Since there's no indirect buffer in sight, markers on
2184 BUF_MARKERS(buf) should either be for `buf' or dead. */
2185 eassert (!m
->buffer
);
2186 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2187 if (m
->buffer
== current_buffer
)
2188 m
->buffer
= other_buffer
;
2190 /* Since there's no indirect buffer in sight, markers on
2191 BUF_MARKERS(buf) should either be for `buf' or dead. */
2192 eassert (!m
->buffer
);
2194 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2195 So since we just swapped the markers between the two buffers, we need
2196 to undo the effect of this swap for window markers. */
2197 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2198 Lisp_Object buf1
, buf2
;
2199 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2201 while (NILP (Fmemq (w
, ws
)))
2204 if (MARKERP (XWINDOW (w
)->pointm
)
2205 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2206 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2207 Fset_marker (XWINDOW (w
)->pointm
,
2208 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2209 XWINDOW (w
)->buffer
);
2210 w
= Fnext_window (w
, Qt
, Qt
);
2214 if (current_buffer
->text
->intervals
)
2215 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2216 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2217 if (other_buffer
->text
->intervals
)
2218 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2219 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2224 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2226 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2227 If FLAG is t, this makes the buffer a multibyte buffer.
2228 If FLAG is nil, this makes the buffer a single-byte buffer.
2229 In these cases, the buffer contents remain unchanged as a sequence of
2230 bytes but the contents viewed as characters do change.
2231 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2232 all eight-bit bytes to eight-bit characters.
2233 If the multibyte flag was really changed, undo information of the
2234 current buffer is cleared. */)
2237 struct Lisp_Marker
*tail
, *markers
;
2238 struct buffer
*other
;
2240 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2241 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2242 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2243 struct gcpro gcpro1
;
2245 if (current_buffer
->base_buffer
)
2246 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2248 /* Do nothing if nothing actually changes. */
2249 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2254 /* Don't record these buffer changes. We will put a special undo entry
2256 BVAR (current_buffer
, undo_list
) = Qt
;
2258 /* If the cached position is for this buffer, clear it out. */
2259 clear_charpos_cache (current_buffer
);
2262 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2264 begv
= BEGV
, zv
= ZV
;
2271 ptrdiff_t pos
, stop
;
2274 /* Do this first, so it can use CHAR_TO_BYTE
2275 to calculate the old correspondences. */
2276 set_intervals_multibyte (0);
2278 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2284 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2287 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2288 tail
->charpos
= tail
->bytepos
;
2290 /* Convert multibyte form of 8-bit characters to unibyte. */
2305 if (ASCII_BYTE_P (*p
))
2307 else if (CHAR_BYTE8_HEAD_P (*p
))
2309 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2310 /* Delete all bytes for this 8-bit character but the
2311 last one, and change the last one to the character
2314 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2326 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2327 p
+= bytes
, pos
+= bytes
;
2331 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2336 ptrdiff_t pos
, stop
;
2337 unsigned char *p
, *pend
;
2339 /* Be sure not to have a multibyte sequence striding over the GAP.
2340 Ex: We change this: "...abc\302 _GAP_ \241def..."
2341 to: "...abc _GAP_ \302\241def..." */
2344 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2345 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2347 unsigned char *q
= GPT_ADDR
- 1;
2349 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2350 if (LEADING_CODE_P (*q
))
2352 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2354 move_gap_both (new_gpt
, new_gpt
);
2358 /* Make the buffer contents valid as multibyte by converting
2359 8-bit characters to multibyte form. */
2377 if (ASCII_BYTE_P (*p
))
2379 else if (EQ (flag
, Qt
)
2380 && ! CHAR_BYTE8_HEAD_P (*p
)
2381 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2382 p
+= bytes
, pos
+= bytes
;
2385 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2388 c
= BYTE8_TO_CHAR (*p
);
2389 bytes
= CHAR_STRING (c
, tmp
);
2391 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2393 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2394 /* Now the gap is after the just inserted data. */
2412 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2414 /* Do this first, so that chars_in_text asks the right question.
2415 set_intervals_multibyte needs it too. */
2416 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2418 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2419 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2421 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2423 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2424 if (BEGV_BYTE
> GPT_BYTE
)
2425 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2427 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2429 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2430 if (ZV_BYTE
> GPT_BYTE
)
2431 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2433 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2436 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2439 if (byte
> GPT_BYTE
)
2440 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2442 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2443 TEMP_SET_PT_BOTH (position
, byte
);
2446 tail
= markers
= BUF_MARKERS (current_buffer
);
2448 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2449 getting confused by the markers that have not yet been updated.
2450 It is also a signal that it should never create a marker. */
2451 BUF_MARKERS (current_buffer
) = NULL
;
2453 for (; tail
; tail
= tail
->next
)
2455 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2456 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2459 /* Make sure no markers were put on the chain
2460 while the chain value was incorrect. */
2461 if (BUF_MARKERS (current_buffer
))
2464 BUF_MARKERS (current_buffer
) = markers
;
2466 /* Do this last, so it can calculate the new correspondences
2467 between chars and bytes. */
2468 set_intervals_multibyte (1);
2471 if (!EQ (old_undo
, Qt
))
2473 /* Represent all the above changes by a special undo entry. */
2474 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2475 intern ("set-buffer-multibyte"),
2476 NILP (flag
) ? Qt
: Qnil
),
2482 /* Changing the multibyteness of a buffer means that all windows
2483 showing that buffer must be updated thoroughly. */
2484 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2485 ++windows_or_buffers_changed
;
2487 /* Copy this buffer's new multibyte status
2488 into all of its indirect buffers. */
2489 FOR_EACH_BUFFER (other
)
2490 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2492 BVAR (other
, enable_multibyte_characters
)
2493 = BVAR (current_buffer
, enable_multibyte_characters
);
2494 other
->prevent_redisplay_optimizations_p
= 1;
2497 /* Restore the modifiedness of the buffer. */
2498 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2499 Fset_buffer_modified_p (Qnil
);
2501 /* Update coding systems of this buffer's process (if any). */
2503 Lisp_Object process
;
2505 process
= Fget_buffer_process (Fcurrent_buffer ());
2506 if (PROCESSP (process
))
2507 setup_process_coding_systems (process
);
2513 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2514 Skill_all_local_variables
, 0, 0, 0,
2515 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2516 Most local variable bindings are eliminated so that the default values
2517 become effective once more. Also, the syntax table is set from
2518 `standard-syntax-table', the local keymap is set to nil,
2519 and the abbrev table from `fundamental-mode-abbrev-table'.
2520 This function also forces redisplay of the mode line.
2522 Every function to select a new major mode starts by
2523 calling this function.
2525 As a special exception, local variables whose names have
2526 a non-nil `permanent-local' property are not eliminated by this function.
2528 The first thing this function does is run
2529 the normal hook `change-major-mode-hook'. */)
2532 Frun_hooks (1, &Qchange_major_mode_hook
);
2534 /* Make sure none of the bindings in local_var_alist
2535 remain swapped in, in their symbols. */
2537 swap_out_buffer_local_variables (current_buffer
);
2539 /* Actually eliminate all local bindings of this buffer. */
2541 reset_buffer_local_variables (current_buffer
, 0);
2543 /* Force mode-line redisplay. Useful here because all major mode
2544 commands call this function. */
2545 update_mode_lines
++;
2550 /* Make sure no local variables remain set up with buffer B
2551 for their current values. */
2554 swap_out_buffer_local_variables (struct buffer
*b
)
2556 Lisp_Object oalist
, alist
, buffer
;
2558 XSETBUFFER (buffer
, b
);
2559 oalist
= BVAR (b
, local_var_alist
);
2561 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2563 Lisp_Object sym
= XCAR (XCAR (alist
));
2564 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2565 /* Need not do anything if some other buffer's binding is
2567 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2569 /* Symbol is set up for this buffer's old local value:
2571 swap_in_global_binding (XSYMBOL (sym
));
2576 /* Find all the overlays in the current buffer that contain position POS.
2577 Return the number found, and store them in a vector in *VEC_PTR.
2578 Store in *LEN_PTR the size allocated for the vector.
2579 Store in *NEXT_PTR the next position after POS where an overlay starts,
2580 or ZV if there are no more overlays between POS and ZV.
2581 Store in *PREV_PTR the previous position before POS where an overlay ends,
2582 or where an overlay starts which ends at or after POS;
2583 or BEGV if there are no such overlays from BEGV to POS.
2584 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2586 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2587 when this function is called.
2589 If EXTEND is non-zero, we make the vector bigger if necessary.
2590 If EXTEND is zero, we never extend the vector,
2591 and we store only as many overlays as will fit.
2592 But we still return the total number of overlays.
2594 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2595 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2596 default (BEGV or ZV). */
2599 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2601 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2603 Lisp_Object overlay
, start
, end
;
2604 struct Lisp_Overlay
*tail
;
2606 ptrdiff_t len
= *len_ptr
;
2607 Lisp_Object
*vec
= *vec_ptr
;
2608 ptrdiff_t next
= ZV
;
2609 ptrdiff_t prev
= BEGV
;
2610 int inhibit_storing
= 0;
2612 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2614 ptrdiff_t startpos
, endpos
;
2616 XSETMISC (overlay
, tail
);
2618 start
= OVERLAY_START (overlay
);
2619 end
= OVERLAY_END (overlay
);
2620 endpos
= OVERLAY_POSITION (end
);
2627 startpos
= OVERLAY_POSITION (start
);
2628 /* This one ends at or after POS
2629 so its start counts for PREV_PTR if it's before POS. */
2630 if (prev
< startpos
&& startpos
< pos
)
2634 if (startpos
<= pos
)
2638 /* The supplied vector is full.
2639 Either make it bigger, or don't store any more in it. */
2642 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2648 inhibit_storing
= 1;
2651 if (!inhibit_storing
)
2653 /* Keep counting overlays even if we can't return them all. */
2656 else if (startpos
< next
)
2660 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2662 ptrdiff_t startpos
, endpos
;
2664 XSETMISC (overlay
, tail
);
2666 start
= OVERLAY_START (overlay
);
2667 end
= OVERLAY_END (overlay
);
2668 startpos
= OVERLAY_POSITION (start
);
2671 if (startpos
< next
)
2675 endpos
= OVERLAY_POSITION (end
);
2682 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2688 inhibit_storing
= 1;
2691 if (!inhibit_storing
)
2695 if (startpos
< pos
&& startpos
> prev
)
2698 else if (endpos
< pos
&& endpos
> prev
)
2700 else if (endpos
== pos
&& startpos
> prev
2701 && (!change_req
|| startpos
< pos
))
2712 /* Find all the overlays in the current buffer that overlap the range
2713 BEG-END, or are empty at BEG, or are empty at END provided END
2714 denotes the position at the end of the current buffer.
2716 Return the number found, and store them in a vector in *VEC_PTR.
2717 Store in *LEN_PTR the size allocated for the vector.
2718 Store in *NEXT_PTR the next position after POS where an overlay starts,
2719 or ZV if there are no more overlays.
2720 Store in *PREV_PTR the previous position before POS where an overlay ends,
2721 or BEGV if there are no previous overlays.
2722 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2724 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2725 when this function is called.
2727 If EXTEND is non-zero, we make the vector bigger if necessary.
2728 If EXTEND is zero, we never extend the vector,
2729 and we store only as many overlays as will fit.
2730 But we still return the total number of overlays. */
2733 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2734 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2735 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2737 Lisp_Object overlay
, ostart
, oend
;
2738 struct Lisp_Overlay
*tail
;
2740 ptrdiff_t len
= *len_ptr
;
2741 Lisp_Object
*vec
= *vec_ptr
;
2742 ptrdiff_t next
= ZV
;
2743 ptrdiff_t prev
= BEGV
;
2744 int inhibit_storing
= 0;
2745 int end_is_Z
= end
== Z
;
2747 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2749 ptrdiff_t startpos
, endpos
;
2751 XSETMISC (overlay
, tail
);
2753 ostart
= OVERLAY_START (overlay
);
2754 oend
= OVERLAY_END (overlay
);
2755 endpos
= OVERLAY_POSITION (oend
);
2762 startpos
= OVERLAY_POSITION (ostart
);
2763 /* Count an interval if it overlaps the range, is empty at the
2764 start of the range, or is empty at END provided END denotes the
2765 end of the buffer. */
2766 if ((beg
< endpos
&& startpos
< end
)
2767 || (startpos
== endpos
2768 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2772 /* The supplied vector is full.
2773 Either make it bigger, or don't store any more in it. */
2776 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2782 inhibit_storing
= 1;
2785 if (!inhibit_storing
)
2787 /* Keep counting overlays even if we can't return them all. */
2790 else if (startpos
< next
)
2794 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2796 ptrdiff_t startpos
, endpos
;
2798 XSETMISC (overlay
, tail
);
2800 ostart
= OVERLAY_START (overlay
);
2801 oend
= OVERLAY_END (overlay
);
2802 startpos
= OVERLAY_POSITION (ostart
);
2805 if (startpos
< next
)
2809 endpos
= OVERLAY_POSITION (oend
);
2810 /* Count an interval if it overlaps the range, is empty at the
2811 start of the range, or is empty at END provided END denotes the
2812 end of the buffer. */
2813 if ((beg
< endpos
&& startpos
< end
)
2814 || (startpos
== endpos
2815 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2821 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2827 inhibit_storing
= 1;
2830 if (!inhibit_storing
)
2834 else if (endpos
< beg
&& endpos
> prev
)
2846 /* Return non-zero if there exists an overlay with a non-nil
2847 `mouse-face' property overlapping OVERLAY. */
2850 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2852 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2853 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2854 ptrdiff_t n
, i
, size
;
2855 Lisp_Object
*v
, tem
;
2858 v
= alloca (size
* sizeof *v
);
2859 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2862 v
= alloca (n
* sizeof *v
);
2863 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2866 for (i
= 0; i
< n
; ++i
)
2867 if (!EQ (v
[i
], overlay
)
2868 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2877 /* Fast function to just test if we're at an overlay boundary. */
2879 overlay_touches_p (ptrdiff_t pos
)
2881 Lisp_Object overlay
;
2882 struct Lisp_Overlay
*tail
;
2884 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2888 XSETMISC (overlay
,tail
);
2889 eassert (OVERLAYP (overlay
));
2891 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2894 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2898 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2902 XSETMISC (overlay
, tail
);
2903 eassert (OVERLAYP (overlay
));
2905 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2908 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2916 Lisp_Object overlay
;
2922 compare_overlays (const void *v1
, const void *v2
)
2924 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2925 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2926 if (s1
->priority
!= s2
->priority
)
2927 return s1
->priority
< s2
->priority
? -1 : 1;
2928 if (s1
->beg
!= s2
->beg
)
2929 return s1
->beg
< s2
->beg
? -1 : 1;
2930 if (s1
->end
!= s2
->end
)
2931 return s2
->end
< s1
->end
? -1 : 1;
2932 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2933 between "equal" overlays. The result can still change between
2934 invocations of Emacs, but it won't change in the middle of
2935 `find_field' (bug#6830). */
2936 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2937 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2941 /* Sort an array of overlays by priority. The array is modified in place.
2942 The return value is the new size; this may be smaller than the original
2943 size if some of the overlays were invalid or were window-specific. */
2945 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2948 struct sortvec
*sortvec
= alloca (noverlays
* sizeof *sortvec
);
2950 /* Put the valid and relevant overlays into sortvec. */
2952 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2955 Lisp_Object overlay
;
2957 overlay
= overlay_vec
[i
];
2958 if (OVERLAYP (overlay
)
2959 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2960 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2962 /* If we're interested in a specific window, then ignore
2963 overlays that are limited to some other window. */
2968 window
= Foverlay_get (overlay
, Qwindow
);
2969 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2973 /* This overlay is good and counts: put it into sortvec. */
2974 sortvec
[j
].overlay
= overlay
;
2975 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2976 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2977 tem
= Foverlay_get (overlay
, Qpriority
);
2979 sortvec
[j
].priority
= XINT (tem
);
2981 sortvec
[j
].priority
= 0;
2987 /* Sort the overlays into the proper order: increasing priority. */
2990 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2992 for (i
= 0; i
< noverlays
; i
++)
2993 overlay_vec
[i
] = sortvec
[i
].overlay
;
2999 Lisp_Object string
, string2
;
3006 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
3007 ptrdiff_t size
; /* Allocated length of that array. */
3008 ptrdiff_t used
; /* How much of the array is currently in use. */
3009 ptrdiff_t bytes
; /* Total length of the strings in buf. */
3012 /* Buffers for storing information about the overlays touching a given
3013 position. These could be automatic variables in overlay_strings, but
3014 it's more efficient to hold onto the memory instead of repeatedly
3015 allocating and freeing it. */
3016 static struct sortstrlist overlay_heads
, overlay_tails
;
3017 static unsigned char *overlay_str_buf
;
3019 /* Allocated length of overlay_str_buf. */
3020 static ptrdiff_t overlay_str_len
;
3022 /* A comparison function suitable for passing to qsort. */
3024 cmp_for_strings (const void *as1
, const void *as2
)
3026 struct sortstr
*s1
= (struct sortstr
*)as1
;
3027 struct sortstr
*s2
= (struct sortstr
*)as2
;
3028 if (s1
->size
!= s2
->size
)
3029 return s2
->size
< s1
->size
? -1 : 1;
3030 if (s1
->priority
!= s2
->priority
)
3031 return s1
->priority
< s2
->priority
? -1 : 1;
3036 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
3037 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
3041 if (ssl
->used
== ssl
->size
)
3042 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
3043 ssl
->buf
[ssl
->used
].string
= str
;
3044 ssl
->buf
[ssl
->used
].string2
= str2
;
3045 ssl
->buf
[ssl
->used
].size
= size
;
3046 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
3049 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3050 nbytes
= SCHARS (str
);
3051 else if (! STRING_MULTIBYTE (str
))
3052 nbytes
= count_size_as_multibyte (SDATA (str
),
3055 nbytes
= SBYTES (str
);
3057 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3058 memory_full (SIZE_MAX
);
3059 ssl
->bytes
+= nbytes
;
3063 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3064 nbytes
= SCHARS (str2
);
3065 else if (! STRING_MULTIBYTE (str2
))
3066 nbytes
= count_size_as_multibyte (SDATA (str2
),
3069 nbytes
= SBYTES (str2
);
3071 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3072 memory_full (SIZE_MAX
);
3073 ssl
->bytes
+= nbytes
;
3077 /* Return the concatenation of the strings associated with overlays that
3078 begin or end at POS, ignoring overlays that are specific to a window
3079 other than W. The strings are concatenated in the appropriate order:
3080 shorter overlays nest inside longer ones, and higher priority inside
3081 lower. Normally all of the after-strings come first, but zero-sized
3082 overlays have their after-strings ride along with the before-strings
3083 because it would look strange to print them inside-out.
3085 Returns the string length, and stores the contents indirectly through
3086 PSTR, if that variable is non-null. The string may be overwritten by
3087 subsequent calls. */
3090 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3092 Lisp_Object overlay
, window
, str
;
3093 struct Lisp_Overlay
*ov
;
3094 ptrdiff_t startpos
, endpos
;
3095 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3097 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3098 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3099 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3101 XSETMISC (overlay
, ov
);
3102 eassert (OVERLAYP (overlay
));
3104 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3105 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3108 if (endpos
!= pos
&& startpos
!= pos
)
3110 window
= Foverlay_get (overlay
, Qwindow
);
3111 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3114 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3115 record_overlay_string (&overlay_heads
, str
,
3117 ? Foverlay_get (overlay
, Qafter_string
)
3119 Foverlay_get (overlay
, Qpriority
),
3121 else if (endpos
== pos
3122 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3123 record_overlay_string (&overlay_tails
, str
, Qnil
,
3124 Foverlay_get (overlay
, Qpriority
),
3127 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3129 XSETMISC (overlay
, ov
);
3130 eassert (OVERLAYP (overlay
));
3132 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3133 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3136 if (endpos
!= pos
&& startpos
!= pos
)
3138 window
= Foverlay_get (overlay
, Qwindow
);
3139 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3142 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3143 record_overlay_string (&overlay_heads
, str
,
3145 ? Foverlay_get (overlay
, Qafter_string
)
3147 Foverlay_get (overlay
, Qpriority
),
3149 else if (endpos
== pos
3150 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3151 record_overlay_string (&overlay_tails
, str
, Qnil
,
3152 Foverlay_get (overlay
, Qpriority
),
3155 if (overlay_tails
.used
> 1)
3156 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3158 if (overlay_heads
.used
> 1)
3159 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3161 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3168 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3169 memory_full (SIZE_MAX
);
3170 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3171 if (total
> overlay_str_len
)
3172 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3173 total
- overlay_str_len
, -1, 1);
3175 p
= overlay_str_buf
;
3176 for (i
= overlay_tails
.used
; --i
>= 0;)
3179 tem
= overlay_tails
.buf
[i
].string
;
3180 nbytes
= copy_text (SDATA (tem
), p
,
3182 STRING_MULTIBYTE (tem
), multibyte
);
3185 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3188 tem
= overlay_heads
.buf
[i
].string
;
3189 nbytes
= copy_text (SDATA (tem
), p
,
3191 STRING_MULTIBYTE (tem
), multibyte
);
3193 tem
= overlay_heads
.buf
[i
].string2
;
3196 nbytes
= copy_text (SDATA (tem
), p
,
3198 STRING_MULTIBYTE (tem
), multibyte
);
3202 if (p
!= overlay_str_buf
+ total
)
3205 *pstr
= overlay_str_buf
;
3211 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3214 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3216 Lisp_Object overlay
, beg
, end
;
3217 struct Lisp_Overlay
*prev
, *tail
, *next
;
3219 /* See if anything in overlays_before should move to overlays_after. */
3221 /* We don't strictly need prev in this loop; it should always be nil.
3222 But we use it for symmetry and in case that should cease to be true
3223 with some future change. */
3225 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3228 XSETMISC (overlay
, tail
);
3229 eassert (OVERLAYP (overlay
));
3231 beg
= OVERLAY_START (overlay
);
3232 end
= OVERLAY_END (overlay
);
3234 if (OVERLAY_POSITION (end
) > pos
)
3236 /* OVERLAY needs to be moved. */
3237 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3238 struct Lisp_Overlay
*other
, *other_prev
;
3240 /* Splice the cons cell TAIL out of overlays_before. */
3244 buf
->overlays_before
= next
;
3246 /* Search thru overlays_after for where to put it. */
3248 for (other
= buf
->overlays_after
; other
;
3249 other_prev
= other
, other
= other
->next
)
3251 Lisp_Object otherbeg
, otheroverlay
;
3253 XSETMISC (otheroverlay
, other
);
3254 eassert (OVERLAYP (otheroverlay
));
3256 otherbeg
= OVERLAY_START (otheroverlay
);
3257 if (OVERLAY_POSITION (otherbeg
) >= where
)
3261 /* Add TAIL to overlays_after before OTHER. */
3264 other_prev
->next
= tail
;
3266 buf
->overlays_after
= tail
;
3270 /* We've reached the things that should stay in overlays_before.
3271 All the rest of overlays_before must end even earlier,
3276 /* See if anything in overlays_after should be in overlays_before. */
3278 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3281 XSETMISC (overlay
, tail
);
3282 eassert (OVERLAYP (overlay
));
3284 beg
= OVERLAY_START (overlay
);
3285 end
= OVERLAY_END (overlay
);
3287 /* Stop looking, when we know that nothing further
3288 can possibly end before POS. */
3289 if (OVERLAY_POSITION (beg
) > pos
)
3292 if (OVERLAY_POSITION (end
) <= pos
)
3294 /* OVERLAY needs to be moved. */
3295 ptrdiff_t where
= OVERLAY_POSITION (end
);
3296 struct Lisp_Overlay
*other
, *other_prev
;
3298 /* Splice the cons cell TAIL out of overlays_after. */
3302 buf
->overlays_after
= next
;
3304 /* Search thru overlays_before for where to put it. */
3306 for (other
= buf
->overlays_before
; other
;
3307 other_prev
= other
, other
= other
->next
)
3309 Lisp_Object otherend
, otheroverlay
;
3311 XSETMISC (otheroverlay
, other
);
3312 eassert (OVERLAYP (otheroverlay
));
3314 otherend
= OVERLAY_END (otheroverlay
);
3315 if (OVERLAY_POSITION (otherend
) <= where
)
3319 /* Add TAIL to overlays_before before OTHER. */
3322 other_prev
->next
= tail
;
3324 buf
->overlays_before
= tail
;
3329 buf
->overlay_center
= pos
;
3333 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3335 /* After an insertion, the lists are still sorted properly,
3336 but we may need to update the value of the overlay center. */
3337 if (current_buffer
->overlay_center
>= pos
)
3338 current_buffer
->overlay_center
+= length
;
3342 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3344 if (current_buffer
->overlay_center
< pos
)
3345 /* The deletion was to our right. No change needed; the before- and
3346 after-lists are still consistent. */
3348 else if (current_buffer
->overlay_center
- pos
> length
)
3349 /* The deletion was to our left. We need to adjust the center value
3350 to account for the change in position, but the lists are consistent
3351 given the new value. */
3352 current_buffer
->overlay_center
-= length
;
3354 /* We're right in the middle. There might be things on the after-list
3355 that now belong on the before-list. Recentering will move them,
3356 and also update the center point. */
3357 recenter_overlay_lists (current_buffer
, pos
);
3360 /* Fix up overlays that were garbled as a result of permuting markers
3361 in the range START through END. Any overlay with at least one
3362 endpoint in this range will need to be unlinked from the overlay
3363 list and reinserted in its proper place.
3364 Such an overlay might even have negative size at this point.
3365 If so, we'll make the overlay empty. */
3367 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3369 Lisp_Object overlay
;
3370 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3371 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3372 /* These are either nil, indicating that before_list or after_list
3373 should be assigned, or the cons cell the cdr of which should be
3375 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3376 /* 'Parent', likewise, indicates a cons cell or
3377 current_buffer->overlays_before or overlays_after, depending
3378 which loop we're in. */
3379 struct Lisp_Overlay
*tail
, *parent
;
3380 ptrdiff_t startpos
, endpos
;
3382 /* This algorithm shifts links around instead of consing and GCing.
3383 The loop invariant is that before_list (resp. after_list) is a
3384 well-formed list except that its last element, the CDR of beforep
3385 (resp. afterp) if beforep (afterp) isn't nil or before_list
3386 (after_list) if it is, is still uninitialized. So it's not a bug
3387 that before_list isn't initialized, although it may look
3389 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3391 XSETMISC (overlay
, tail
);
3393 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3394 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3396 /* If the overlay is backwards, make it empty. */
3397 if (endpos
< startpos
)
3400 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3408 || (startpos
>= start
&& startpos
< end
))
3410 /* Add it to the end of the wrong list. Later on,
3411 recenter_overlay_lists will move it to the right place. */
3412 if (endpos
< current_buffer
->overlay_center
)
3417 afterp
->next
= tail
;
3425 beforep
->next
= tail
;
3429 current_buffer
->overlays_before
= tail
->next
;
3431 parent
->next
= tail
->next
;
3435 parent
= tail
, tail
= parent
->next
;
3437 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3439 XSETMISC (overlay
, tail
);
3441 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3442 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3444 /* If the overlay is backwards, make it empty. */
3445 if (endpos
< startpos
)
3448 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3452 if (startpos
>= end
)
3455 if (startpos
>= start
3456 || (endpos
>= start
&& endpos
< end
))
3458 if (endpos
< current_buffer
->overlay_center
)
3463 afterp
->next
= tail
;
3471 beforep
->next
= tail
;
3475 current_buffer
->overlays_after
= tail
->next
;
3477 parent
->next
= tail
->next
;
3481 parent
= tail
, tail
= parent
->next
;
3484 /* Splice the constructed (wrong) lists into the buffer's lists,
3485 and let the recenter function make it sane again. */
3488 beforep
->next
= current_buffer
->overlays_before
;
3489 current_buffer
->overlays_before
= before_list
;
3491 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3495 afterp
->next
= current_buffer
->overlays_after
;
3496 current_buffer
->overlays_after
= after_list
;
3498 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3501 /* We have two types of overlay: the one whose ending marker is
3502 after-insertion-marker (this is the usual case) and the one whose
3503 ending marker is before-insertion-marker. When `overlays_before'
3504 contains overlays of the latter type and the former type in this
3505 order and both overlays end at inserting position, inserting a text
3506 increases only the ending marker of the latter type, which results
3507 in incorrect ordering of `overlays_before'.
3509 This function fixes ordering of overlays in the slot
3510 `overlays_before' of the buffer *BP. Before the insertion, `point'
3511 was at PREV, and now is at POS. */
3514 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3516 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3517 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3519 ptrdiff_t end
IF_LINT (= 0);
3521 /* After the insertion, the several overlays may be in incorrect
3522 order. The possibility is that, in the list `overlays_before',
3523 an overlay which ends at POS appears after an overlay which ends
3524 at PREV. Since POS is greater than PREV, we must fix the
3525 ordering of these overlays, by moving overlays ends at POS before
3526 the overlays ends at PREV. */
3528 /* At first, find a place where disordered overlays should be linked
3529 in. It is where an overlay which end before POS exists. (i.e. an
3530 overlay whose ending marker is after-insertion-marker if disorder
3533 && (XSETMISC (tem
, tail
),
3534 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3540 /* If we don't find such an overlay,
3541 or the found one ends before PREV,
3542 or the found one is the last one in the list,
3543 we don't have to fix anything. */
3544 if (!tail
|| end
< prev
|| !tail
->next
)
3547 right_pair
= parent
;
3551 /* Now, end position of overlays in the list TAIL should be before
3552 or equal to PREV. In the loop, an overlay which ends at POS is
3553 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3554 we found an overlay which ends before PREV, the remaining
3555 overlays are in correct order. */
3558 XSETMISC (tem
, tail
);
3559 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3562 { /* This overlay is disordered. */
3563 struct Lisp_Overlay
*found
= tail
;
3565 /* Unlink the found overlay. */
3567 parent
->next
= tail
;
3568 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3569 and link it into the right place. */
3572 found
->next
= bp
->overlays_before
;
3573 bp
->overlays_before
= found
;
3577 found
->next
= right_pair
->next
;
3578 right_pair
->next
= found
;
3581 else if (end
== prev
)
3586 else /* No more disordered overlay. */
3591 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3592 doc
: /* Return t if OBJECT is an overlay. */)
3593 (Lisp_Object object
)
3595 return (OVERLAYP (object
) ? Qt
: Qnil
);
3598 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3599 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3600 If omitted, BUFFER defaults to the current buffer.
3601 BEG and END may be integers or markers.
3602 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3603 for the front of the overlay advance when text is inserted there
3604 \(which means the text *is not* included in the overlay).
3605 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3606 for the rear of the overlay advance when text is inserted there
3607 \(which means the text *is* included in the overlay). */)
3608 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3610 Lisp_Object overlay
;
3614 XSETBUFFER (buffer
, current_buffer
);
3616 CHECK_BUFFER (buffer
);
3618 && ! EQ (Fmarker_buffer (beg
), buffer
))
3619 error ("Marker points into wrong buffer");
3621 && ! EQ (Fmarker_buffer (end
), buffer
))
3622 error ("Marker points into wrong buffer");
3624 CHECK_NUMBER_COERCE_MARKER (beg
);
3625 CHECK_NUMBER_COERCE_MARKER (end
);
3627 if (XINT (beg
) > XINT (end
))
3630 temp
= beg
; beg
= end
; end
= temp
;
3633 b
= XBUFFER (buffer
);
3635 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3636 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3638 if (!NILP (front_advance
))
3639 XMARKER (beg
)->insertion_type
= 1;
3640 if (!NILP (rear_advance
))
3641 XMARKER (end
)->insertion_type
= 1;
3643 overlay
= allocate_misc ();
3644 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3645 XOVERLAY (overlay
)->start
= beg
;
3646 XOVERLAY (overlay
)->end
= end
;
3647 XOVERLAY (overlay
)->plist
= Qnil
;
3648 XOVERLAY (overlay
)->next
= NULL
;
3650 /* Put the new overlay on the wrong list. */
3651 end
= OVERLAY_END (overlay
);
3652 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3654 if (b
->overlays_after
)
3655 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3656 b
->overlays_after
= XOVERLAY (overlay
);
3660 if (b
->overlays_before
)
3661 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3662 b
->overlays_before
= XOVERLAY (overlay
);
3665 /* This puts it in the right list, and in the right order. */
3666 recenter_overlay_lists (b
, b
->overlay_center
);
3668 /* We don't need to redisplay the region covered by the overlay, because
3669 the overlay has no properties at the moment. */
3674 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3677 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3681 ptrdiff_t temp
= start
;
3686 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3688 /* If this is a buffer not in the selected window,
3689 we must do other windows. */
3690 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3691 windows_or_buffers_changed
= 1;
3692 /* If multiple windows show this buffer, we must do other windows. */
3693 else if (buffer_shared
> 1)
3694 windows_or_buffers_changed
= 1;
3695 /* If we modify an overlay at the end of the buffer, we cannot
3696 be sure that window end is still valid. */
3697 else if (end
>= ZV
&& start
<= ZV
)
3698 windows_or_buffers_changed
= 1;
3700 ++BUF_OVERLAY_MODIFF (buf
);
3703 /* Remove OVERLAY from LIST. */
3705 static struct Lisp_Overlay
*
3706 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3708 register struct Lisp_Overlay
*tail
, **prev
= &list
;
3710 for (tail
= list
; tail
; prev
= &tail
->next
, tail
= *prev
)
3711 if (tail
== overlay
)
3713 *prev
= overlay
->next
;
3714 overlay
->next
= NULL
;
3720 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3721 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3722 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3723 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3725 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3727 struct buffer
*b
, *ob
= 0;
3728 Lisp_Object obuffer
;
3729 ptrdiff_t count
= SPECPDL_INDEX ();
3730 ptrdiff_t n_beg
, n_end
, o_beg
IF_LINT (= 0), o_end
IF_LINT (= 0);
3732 CHECK_OVERLAY (overlay
);
3734 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3736 XSETBUFFER (buffer
, current_buffer
);
3737 CHECK_BUFFER (buffer
);
3739 if (NILP (Fbuffer_live_p (buffer
)))
3740 error ("Attempt to move overlay to a dead buffer");
3743 && ! EQ (Fmarker_buffer (beg
), buffer
))
3744 error ("Marker points into wrong buffer");
3746 && ! EQ (Fmarker_buffer (end
), buffer
))
3747 error ("Marker points into wrong buffer");
3749 CHECK_NUMBER_COERCE_MARKER (beg
);
3750 CHECK_NUMBER_COERCE_MARKER (end
);
3752 if (XINT (beg
) > XINT (end
))
3755 temp
= beg
; beg
= end
; end
= temp
;
3758 specbind (Qinhibit_quit
, Qt
);
3760 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3761 b
= XBUFFER (buffer
);
3763 if (!NILP (obuffer
))
3765 ob
= XBUFFER (obuffer
);
3767 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3768 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3770 ob
->overlays_before
=
3771 unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3772 ob
->overlays_after
=
3773 unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3774 eassert (XOVERLAY (overlay
)->next
== NULL
);
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 b
->overlays_after
= XOVERLAY (overlay
);
3819 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3820 b
->overlays_before
= 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
);
3847 = unchain_overlay (b
->overlays_before
, XOVERLAY (overlay
));
3849 = unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3850 eassert (XOVERLAY (overlay
)->next
== NULL
);
3852 drop_overlay (b
, XOVERLAY (overlay
));
3854 /* When deleting an overlay with before or after strings, turn off
3855 display optimizations for the affected buffer, on the basis that
3856 these strings may contain newlines. This is easier to do than to
3857 check for that situation during redisplay. */
3858 if (!windows_or_buffers_changed
3859 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3860 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3861 b
->prevent_redisplay_optimizations_p
= 1;
3863 return unbind_to (count
, Qnil
);
3866 /* Overlay dissection functions. */
3868 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3869 doc
: /* Return the position at which OVERLAY starts. */)
3870 (Lisp_Object overlay
)
3872 CHECK_OVERLAY (overlay
);
3874 return (Fmarker_position (OVERLAY_START (overlay
)));
3877 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3878 doc
: /* Return the position at which OVERLAY ends. */)
3879 (Lisp_Object overlay
)
3881 CHECK_OVERLAY (overlay
);
3883 return (Fmarker_position (OVERLAY_END (overlay
)));
3886 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3887 doc
: /* Return the buffer OVERLAY belongs to.
3888 Return nil if OVERLAY has been deleted. */)
3889 (Lisp_Object overlay
)
3891 CHECK_OVERLAY (overlay
);
3893 return Fmarker_buffer (OVERLAY_START (overlay
));
3896 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3897 doc
: /* Return a list of the properties on OVERLAY.
3898 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3900 (Lisp_Object overlay
)
3902 CHECK_OVERLAY (overlay
);
3904 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3908 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3909 doc
: /* Return a list of the overlays that contain the character at POS. */)
3912 ptrdiff_t len
, noverlays
;
3913 Lisp_Object
*overlay_vec
;
3916 CHECK_NUMBER_COERCE_MARKER (pos
);
3919 /* We can't use alloca here because overlays_at can call xrealloc. */
3920 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3922 /* Put all the overlays we want in a vector in overlay_vec.
3923 Store the length in len. */
3924 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3927 /* Make a list of them all. */
3928 result
= Flist (noverlays
, overlay_vec
);
3930 xfree (overlay_vec
);
3934 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3935 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3936 Overlap means that at least one character is contained within the overlay
3937 and also contained within the specified region.
3938 Empty overlays are included in the result if they are located at BEG,
3939 between BEG and END, or at END provided END denotes the position at the
3940 end of the buffer. */)
3941 (Lisp_Object beg
, Lisp_Object end
)
3943 ptrdiff_t len
, noverlays
;
3944 Lisp_Object
*overlay_vec
;
3947 CHECK_NUMBER_COERCE_MARKER (beg
);
3948 CHECK_NUMBER_COERCE_MARKER (end
);
3951 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3953 /* Put all the overlays we want in a vector in overlay_vec.
3954 Store the length in len. */
3955 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3958 /* Make a list of them all. */
3959 result
= Flist (noverlays
, overlay_vec
);
3961 xfree (overlay_vec
);
3965 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3967 doc
: /* Return the next position after POS where an overlay starts or ends.
3968 If there are no overlay boundaries from POS to (point-max),
3969 the value is (point-max). */)
3972 ptrdiff_t i
, len
, noverlays
;
3974 Lisp_Object
*overlay_vec
;
3976 CHECK_NUMBER_COERCE_MARKER (pos
);
3979 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3981 /* Put all the overlays we want in a vector in overlay_vec.
3982 Store the length in len.
3983 endpos gets the position where the next overlay starts. */
3984 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3987 /* If any of these overlays ends before endpos,
3988 use its ending point instead. */
3989 for (i
= 0; i
< noverlays
; i
++)
3994 oend
= OVERLAY_END (overlay_vec
[i
]);
3995 oendpos
= OVERLAY_POSITION (oend
);
3996 if (oendpos
< endpos
)
4000 xfree (overlay_vec
);
4001 return make_number (endpos
);
4004 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4005 Sprevious_overlay_change
, 1, 1, 0,
4006 doc
: /* Return the previous position before POS where an overlay starts or ends.
4007 If there are no overlay boundaries from (point-min) to POS,
4008 the value is (point-min). */)
4012 Lisp_Object
*overlay_vec
;
4015 CHECK_NUMBER_COERCE_MARKER (pos
);
4017 /* At beginning of buffer, we know the answer;
4018 avoid bug subtracting 1 below. */
4019 if (XINT (pos
) == BEGV
)
4023 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
4025 /* Put all the overlays we want in a vector in overlay_vec.
4026 Store the length in len.
4027 prevpos gets the position of the previous change. */
4028 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4031 xfree (overlay_vec
);
4032 return make_number (prevpos
);
4035 /* These functions are for debugging overlays. */
4037 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4038 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4039 The car has all the overlays before the overlay center;
4040 the cdr has all the overlays after the overlay center.
4041 Recentering overlays moves overlays between these lists.
4042 The lists you get are copies, so that changing them has no effect.
4043 However, the overlays you get are the real objects that the buffer uses. */)
4046 struct Lisp_Overlay
*ol
;
4047 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4048 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4051 before
= Fcons (tmp
, before
);
4053 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4056 after
= Fcons (tmp
, after
);
4058 return Fcons (Fnreverse (before
), Fnreverse (after
));
4061 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4062 doc
: /* Recenter the overlays of the current buffer around position POS.
4063 That makes overlay lookup faster for positions near POS (but perhaps slower
4064 for positions far away from POS). */)
4068 CHECK_NUMBER_COERCE_MARKER (pos
);
4070 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4071 recenter_overlay_lists (current_buffer
, p
);
4075 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4076 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4077 (Lisp_Object overlay
, Lisp_Object prop
)
4079 CHECK_OVERLAY (overlay
);
4080 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4083 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4084 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4085 VALUE will be returned.*/)
4086 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4088 Lisp_Object tail
, buffer
;
4091 CHECK_OVERLAY (overlay
);
4093 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4095 for (tail
= XOVERLAY (overlay
)->plist
;
4096 CONSP (tail
) && CONSP (XCDR (tail
));
4097 tail
= XCDR (XCDR (tail
)))
4098 if (EQ (XCAR (tail
), prop
))
4100 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4101 XSETCAR (XCDR (tail
), value
);
4104 /* It wasn't in the list, so add it to the front. */
4105 changed
= !NILP (value
);
4106 XOVERLAY (overlay
)->plist
4107 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4109 if (! NILP (buffer
))
4112 modify_overlay (XBUFFER (buffer
),
4113 marker_position (OVERLAY_START (overlay
)),
4114 marker_position (OVERLAY_END (overlay
)));
4115 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4116 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4117 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4118 Fdelete_overlay (overlay
);
4124 /* Subroutine of report_overlay_modification. */
4126 /* Lisp vector holding overlay hook functions to call.
4127 Vector elements come in pairs.
4128 Each even-index element is a list of hook functions.
4129 The following odd-index element is the overlay they came from.
4131 Before the buffer change, we fill in this vector
4132 as we call overlay hook functions.
4133 After the buffer change, we get the functions to call from this vector.
4134 This way we always call the same functions before and after the change. */
4135 static Lisp_Object last_overlay_modification_hooks
;
4137 /* Number of elements actually used in last_overlay_modification_hooks. */
4138 static ptrdiff_t last_overlay_modification_hooks_used
;
4140 /* Add one functionlist/overlay pair
4141 to the end of last_overlay_modification_hooks. */
4144 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4146 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4148 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4149 last_overlay_modification_hooks
=
4150 larger_vector (last_overlay_modification_hooks
, 2, -1);
4151 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4152 functionlist
); last_overlay_modification_hooks_used
++;
4153 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4154 overlay
); last_overlay_modification_hooks_used
++;
4157 /* Run the modification-hooks of overlays that include
4158 any part of the text in START to END.
4159 If this change is an insertion, also
4160 run the insert-before-hooks of overlay starting at END,
4161 and the insert-after-hooks of overlay ending at START.
4163 This is called both before and after the modification.
4164 AFTER is nonzero when we call after the modification.
4166 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4167 When AFTER is nonzero, they are the start position,
4168 the position after the inserted new text,
4169 and the length of deleted or replaced old text. */
4172 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4173 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4175 Lisp_Object prop
, overlay
;
4176 struct Lisp_Overlay
*tail
;
4177 /* 1 if this change is an insertion. */
4178 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4179 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4184 /* We used to run the functions as soon as we found them and only register
4185 them in last_overlay_modification_hooks for the purpose of the `after'
4186 case. But running elisp code as we traverse the list of overlays is
4187 painful because the list can be modified by the elisp code so we had to
4188 copy at several places. We now simply do a read-only traversal that
4189 only collects the functions to run and we run them afterwards. It's
4190 simpler, especially since all the code was already there. -stef */
4194 /* We are being called before a change.
4195 Scan the overlays to find the functions to call. */
4196 last_overlay_modification_hooks_used
= 0;
4197 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4199 ptrdiff_t startpos
, endpos
;
4200 Lisp_Object ostart
, oend
;
4202 XSETMISC (overlay
, tail
);
4204 ostart
= OVERLAY_START (overlay
);
4205 oend
= OVERLAY_END (overlay
);
4206 endpos
= OVERLAY_POSITION (oend
);
4207 if (XFASTINT (start
) > endpos
)
4209 startpos
= OVERLAY_POSITION (ostart
);
4210 if (insertion
&& (XFASTINT (start
) == startpos
4211 || XFASTINT (end
) == startpos
))
4213 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4215 add_overlay_mod_hooklist (prop
, overlay
);
4217 if (insertion
&& (XFASTINT (start
) == endpos
4218 || XFASTINT (end
) == endpos
))
4220 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4222 add_overlay_mod_hooklist (prop
, overlay
);
4224 /* Test for intersecting intervals. This does the right thing
4225 for both insertion and deletion. */
4226 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4228 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4230 add_overlay_mod_hooklist (prop
, overlay
);
4234 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4236 ptrdiff_t startpos
, endpos
;
4237 Lisp_Object ostart
, oend
;
4239 XSETMISC (overlay
, tail
);
4241 ostart
= OVERLAY_START (overlay
);
4242 oend
= OVERLAY_END (overlay
);
4243 startpos
= OVERLAY_POSITION (ostart
);
4244 endpos
= OVERLAY_POSITION (oend
);
4245 if (XFASTINT (end
) < startpos
)
4247 if (insertion
&& (XFASTINT (start
) == startpos
4248 || XFASTINT (end
) == startpos
))
4250 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4252 add_overlay_mod_hooklist (prop
, overlay
);
4254 if (insertion
&& (XFASTINT (start
) == endpos
4255 || XFASTINT (end
) == endpos
))
4257 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4259 add_overlay_mod_hooklist (prop
, overlay
);
4261 /* Test for intersecting intervals. This does the right thing
4262 for both insertion and deletion. */
4263 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4265 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4267 add_overlay_mod_hooklist (prop
, overlay
);
4272 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4274 /* Call the functions recorded in last_overlay_modification_hooks.
4275 First copy the vector contents, in case some of these hooks
4276 do subsequent modification of the buffer. */
4277 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4278 Lisp_Object
*copy
= alloca (size
* sizeof *copy
);
4281 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4282 size
* sizeof (Lisp_Object
));
4284 gcpro1
.nvars
= size
;
4286 for (i
= 0; i
< size
;)
4288 Lisp_Object prop_i
, overlay_i
;
4290 overlay_i
= copy
[i
++];
4291 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4298 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4299 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4301 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4303 GCPRO4 (list
, arg1
, arg2
, arg3
);
4305 while (CONSP (list
))
4308 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4310 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4316 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4319 evaporate_overlays (ptrdiff_t pos
)
4321 Lisp_Object overlay
, hit_list
;
4322 struct Lisp_Overlay
*tail
;
4325 if (pos
<= current_buffer
->overlay_center
)
4326 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4329 XSETMISC (overlay
, tail
);
4330 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4333 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4334 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4335 hit_list
= Fcons (overlay
, hit_list
);
4338 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4341 XSETMISC (overlay
, tail
);
4342 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4345 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4346 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4347 hit_list
= Fcons (overlay
, hit_list
);
4349 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4350 Fdelete_overlay (XCAR (hit_list
));
4353 /* Somebody has tried to store a value with an unacceptable type
4354 in the slot with offset OFFSET. */
4357 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4359 Lisp_Object predicate
;
4363 case_Lisp_Int
: predicate
= Qintegerp
; break;
4364 case Lisp_String
: predicate
= Qstringp
; break;
4365 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4369 wrong_type_argument (predicate
, newval
);
4373 /***********************************************************************
4374 Allocation with mmap
4375 ***********************************************************************/
4377 #ifdef USE_MMAP_FOR_BUFFERS
4379 #include <sys/types.h>
4380 #include <sys/mman.h>
4383 #ifdef MAP_ANONYMOUS
4384 #define MAP_ANON MAP_ANONYMOUS
4391 #define MAP_FAILED ((void *) -1)
4403 /* Memory is allocated in regions which are mapped using mmap(2).
4404 The current implementation lets the system select mapped
4405 addresses; we're not using MAP_FIXED in general, except when
4406 trying to enlarge regions.
4408 Each mapped region starts with a mmap_region structure, the user
4409 area starts after that structure, aligned to MEM_ALIGN.
4411 +-----------------------+
4412 | struct mmap_info + |
4414 +-----------------------+
4418 +-----------------------+ */
4422 /* User-specified size. */
4423 size_t nbytes_specified
;
4425 /* Number of bytes mapped */
4426 size_t nbytes_mapped
;
4428 /* Pointer to the location holding the address of the memory
4429 allocated with the mmap'd block. The variable actually points
4430 after this structure. */
4433 /* Next and previous in list of all mmap'd regions. */
4434 struct mmap_region
*next
, *prev
;
4437 /* Doubly-linked list of mmap'd regions. */
4439 static struct mmap_region
*mmap_regions
;
4441 /* File descriptor for mmap. If we don't have anonymous mapping,
4442 /dev/zero will be opened on it. */
4446 /* Temporary storage for mmap_set_vars, see there. */
4448 static struct mmap_region
*mmap_regions_1
;
4449 static int mmap_fd_1
;
4451 /* Page size on this system. */
4453 static int mmap_page_size
;
4455 /* 1 means mmap has been initialized. */
4457 static int mmap_initialized_p
;
4459 /* Value is X rounded up to the next multiple of N. */
4461 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4463 /* Size of mmap_region structure plus padding. */
4465 #define MMAP_REGION_STRUCT_SIZE \
4466 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4468 /* Given a pointer P to the start of the user-visible part of a mapped
4469 region, return a pointer to the start of the region. */
4471 #define MMAP_REGION(P) \
4472 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4474 /* Given a pointer P to the start of a mapped region, return a pointer
4475 to the start of the user-visible part of the region. */
4477 #define MMAP_USER_AREA(P) \
4478 ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4480 #define MEM_ALIGN sizeof (double)
4482 /* Predicate returning true if part of the address range [START .. END]
4483 is currently mapped. Used to prevent overwriting an existing
4486 Default is to conservatively assume the address range is occupied by
4487 something else. This can be overridden by system configuration
4488 files if system-specific means to determine this exists. */
4490 #ifndef MMAP_ALLOCATED_P
4491 #define MMAP_ALLOCATED_P(start, end) 1
4494 /* Perform necessary initializations for the use of mmap. */
4500 /* The value of mmap_fd is initially 0 in temacs, and -1
4501 in a dumped Emacs. */
4504 /* No anonymous mmap -- we need the file descriptor. */
4505 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4507 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4509 #endif /* MAP_ANON == 0 */
4511 if (mmap_initialized_p
)
4513 mmap_initialized_p
= 1;
4519 mmap_page_size
= getpagesize ();
4522 /* Return a region overlapping address range START...END, or null if
4523 none. END is not including, i.e. the last byte in the range
4526 static struct mmap_region
*
4527 mmap_find (void *start
, void *end
)
4529 struct mmap_region
*r
;
4530 char *s
= (char *) start
, *e
= (char *) end
;
4532 for (r
= mmap_regions
; r
; r
= r
->next
)
4534 char *rstart
= (char *) r
;
4535 char *rend
= rstart
+ r
->nbytes_mapped
;
4537 if (/* First byte of range, i.e. START, in this region? */
4538 (s
>= rstart
&& s
< rend
)
4539 /* Last byte of range, i.e. END - 1, in this region? */
4540 || (e
> rstart
&& e
<= rend
)
4541 /* First byte of this region in the range? */
4542 || (rstart
>= s
&& rstart
< e
)
4543 /* Last byte of this region in the range? */
4544 || (rend
> s
&& rend
<= e
))
4552 /* Unmap a region. P is a pointer to the start of the user-araa of
4553 the region. Value is non-zero if successful. */
4556 mmap_free_1 (struct mmap_region
*r
)
4559 r
->next
->prev
= r
->prev
;
4561 r
->prev
->next
= r
->next
;
4563 mmap_regions
= r
->next
;
4565 if (munmap (r
, r
->nbytes_mapped
) == -1)
4567 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4575 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4576 Value is non-zero if successful. */
4579 mmap_enlarge (struct mmap_region
*r
, int npages
)
4581 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4587 /* Unmap pages at the end of the region. */
4588 nbytes
= - npages
* mmap_page_size
;
4589 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4590 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4593 r
->nbytes_mapped
-= nbytes
;
4597 else if (npages
> 0)
4599 nbytes
= npages
* mmap_page_size
;
4601 /* Try to map additional pages at the end of the region. We
4602 cannot do this if the address range is already occupied by
4603 something else because mmap deletes any previous mapping.
4604 I'm not sure this is worth doing, let's see. */
4605 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4609 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4610 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4611 if (p
== MAP_FAILED
)
4612 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4613 else if (p
!= region_end
)
4615 /* Kernels are free to choose a different address. In
4616 that case, unmap what we've mapped above; we have
4618 if (munmap (p
, nbytes
) == -1)
4619 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4623 r
->nbytes_mapped
+= nbytes
;
4633 /* Set or reset variables holding references to mapped regions. If
4634 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4635 non-zero, set all variables to the start of the user-areas
4638 This function is called from Fdump_emacs to ensure that the dumped
4639 Emacs doesn't contain references to memory that won't be mapped
4640 when Emacs starts. */
4643 mmap_set_vars (int restore_p
)
4645 struct mmap_region
*r
;
4649 mmap_regions
= mmap_regions_1
;
4650 mmap_fd
= mmap_fd_1
;
4651 for (r
= mmap_regions
; r
; r
= r
->next
)
4652 *r
->var
= MMAP_USER_AREA (r
);
4656 for (r
= mmap_regions
; r
; r
= r
->next
)
4658 mmap_regions_1
= mmap_regions
;
4659 mmap_regions
= NULL
;
4660 mmap_fd_1
= mmap_fd
;
4666 /* Allocate a block of storage large enough to hold NBYTES bytes of
4667 data. A pointer to the data is returned in *VAR. VAR is thus the
4668 address of some variable which will use the data area.
4670 The allocation of 0 bytes is valid.
4672 If we can't allocate the necessary memory, set *VAR to null, and
4676 mmap_alloc (void **var
, size_t nbytes
)
4683 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4684 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4687 if (p
== MAP_FAILED
)
4689 if (errno
!= ENOMEM
)
4690 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4695 struct mmap_region
*r
= (struct mmap_region
*) p
;
4697 r
->nbytes_specified
= nbytes
;
4698 r
->nbytes_mapped
= map
;
4701 r
->next
= mmap_regions
;
4706 p
= MMAP_USER_AREA (p
);
4713 /* Free a block of relocatable storage whose data is pointed to by
4714 PTR. Store 0 in *PTR to show there's no block allocated. */
4717 mmap_free (void **var
)
4723 mmap_free_1 (MMAP_REGION (*var
));
4729 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4730 resize it to size NBYTES. Change *VAR to reflect the new block,
4731 and return this value. If more memory cannot be allocated, then
4732 leave *VAR unchanged, and return null. */
4735 mmap_realloc (void **var
, size_t nbytes
)
4742 result
= mmap_alloc (var
, nbytes
);
4743 else if (nbytes
== 0)
4746 result
= mmap_alloc (var
, nbytes
);
4750 struct mmap_region
*r
= MMAP_REGION (*var
);
4751 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4756 void *old_ptr
= *var
;
4758 /* Try to map additional pages at the end of the region.
4759 If that fails, allocate a new region, copy data
4760 from the old region, then free it. */
4761 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4764 r
->nbytes_specified
= nbytes
;
4765 *var
= result
= old_ptr
;
4767 else if (mmap_alloc (var
, nbytes
))
4769 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4770 mmap_free_1 (MMAP_REGION (old_ptr
));
4772 r
= MMAP_REGION (result
);
4773 r
->nbytes_specified
= nbytes
;
4781 else if (room
- nbytes
>= mmap_page_size
)
4783 /* Shrinking by at least a page. Let's give some
4784 memory back to the system.
4786 The extra parens are to make the division happens first,
4787 on positive values, so we know it will round towards
4789 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4791 r
->nbytes_specified
= nbytes
;
4795 /* Leave it alone. */
4797 r
->nbytes_specified
= nbytes
;
4805 #endif /* USE_MMAP_FOR_BUFFERS */
4809 /***********************************************************************
4810 Buffer-text Allocation
4811 ***********************************************************************/
4813 /* Allocate NBYTES bytes for buffer B's text buffer. */
4816 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4821 #if defined USE_MMAP_FOR_BUFFERS
4822 p
= mmap_alloc ((void **) &b
->text
->beg
, nbytes
);
4823 #elif defined REL_ALLOC
4824 p
= r_alloc ((void **) &b
->text
->beg
, nbytes
);
4826 p
= xmalloc (nbytes
);
4832 memory_full (nbytes
);
4835 b
->text
->beg
= (unsigned char *) p
;
4839 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4843 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4846 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4849 #if defined USE_MMAP_FOR_BUFFERS
4850 p
= mmap_realloc ((void **) &b
->text
->beg
, nbytes
);
4851 #elif defined REL_ALLOC
4852 p
= r_re_alloc ((void **) &b
->text
->beg
, nbytes
);
4854 p
= xrealloc (b
->text
->beg
, nbytes
);
4860 memory_full (nbytes
);
4863 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4868 /* Free buffer B's text buffer. */
4871 free_buffer_text (struct buffer
*b
)
4875 #if defined USE_MMAP_FOR_BUFFERS
4876 mmap_free ((void **) &b
->text
->beg
);
4877 #elif defined REL_ALLOC
4878 r_alloc_free ((void **) &b
->text
->beg
);
4880 xfree (b
->text
->beg
);
4883 BUF_BEG_ADDR (b
) = NULL
;
4889 /***********************************************************************
4891 ***********************************************************************/
4894 init_buffer_once (void)
4897 /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make
4898 sure that this is still correct. Otherwise, mark_vectorlike may not
4899 trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */
4901 = (offsetof (struct buffer
, own_text
) - sizeof (struct vectorlike_header
))
4902 / sizeof (Lisp_Object
);
4904 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4906 /* Make sure all markable slots in buffer_defaults
4907 are initialized reasonably, so mark_buffer won't choke. */
4908 reset_buffer (&buffer_defaults
);
4909 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4910 reset_buffer_local_variables (&buffer_defaults
, 1);
4911 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4912 reset_buffer (&buffer_local_symbols
);
4913 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4914 /* Prevent GC from getting confused. */
4915 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4916 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4917 BUF_INTERVALS (&buffer_defaults
) = 0;
4918 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4919 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, pvecsize
);
4920 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4921 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, pvecsize
);
4922 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4924 /* Set up the default values of various buffer slots. */
4925 /* Must do these before making the first buffer! */
4927 /* real setup is done in bindings.el */
4928 BVAR (&buffer_defaults
, mode_line_format
) = build_pure_c_string ("%-");
4929 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4930 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4931 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4932 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4933 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4934 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4935 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4936 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4937 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4938 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4939 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4940 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4941 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4942 buffer_defaults
.overlays_before
= NULL
;
4943 buffer_defaults
.overlays_after
= NULL
;
4944 buffer_defaults
.overlay_center
= BEG
;
4946 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4947 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4948 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4949 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4950 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4951 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4952 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4953 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4954 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4956 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4957 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4958 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4959 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4960 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4961 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4962 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4963 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4964 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4965 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4966 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4967 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4968 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4969 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4970 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4971 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4972 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4973 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4974 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4975 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4976 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4978 /* Assign the local-flags to the slots that have default values.
4979 The local flag is a bit that is used in the buffer
4980 to say that it has its own local value for the slot.
4981 The local flag bits are in the local_var_flags slot of the buffer. */
4983 /* Nothing can work if this isn't true */
4984 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4986 /* 0 means not a lisp var, -1 means always local, else mask */
4987 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4988 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4989 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4990 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4991 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4992 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4993 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4994 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4995 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4996 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4997 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4998 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4999 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
5000 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
5001 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
5002 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
5003 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
5004 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
5005 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
5008 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
5010 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
5012 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
5013 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
5014 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
5015 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
5016 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
5017 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
5018 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
5019 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
5020 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
5021 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
5022 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
5023 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
5024 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
5025 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
5026 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
5027 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
5028 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
5029 /* Make this one a permanent local. */
5030 buffer_permanent_local_flags
[idx
++] = 1;
5031 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
5032 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
5033 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
5034 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5035 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5036 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5037 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5038 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5039 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5040 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5041 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5042 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5043 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5044 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5045 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5046 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5047 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5049 /* Need more room? */
5050 if (idx
>= MAX_PER_BUFFER_VARS
)
5052 last_per_buffer_idx
= idx
;
5054 Vbuffer_alist
= Qnil
;
5058 QSFundamental
= build_pure_c_string ("Fundamental");
5060 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5061 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5063 Qmode_class
= intern_c_string ("mode-class");
5065 Qprotected_field
= intern_c_string ("protected-field");
5067 Qpermanent_local
= intern_c_string ("permanent-local");
5069 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5070 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5072 /* super-magic invisible buffer */
5073 Vprin1_to_string_buffer
= Fget_buffer_create (build_pure_c_string (" prin1"));
5074 Vbuffer_alist
= Qnil
;
5076 Fset_buffer (Fget_buffer_create (build_pure_c_string ("*scratch*")));
5078 inhibit_modification_hooks
= 0;
5088 #ifdef USE_MMAP_FOR_BUFFERS
5090 /* When using the ralloc implementation based on mmap(2), buffer
5091 text pointers will have been set to null in the dumped Emacs.
5096 if (b
->text
->beg
== NULL
)
5097 enlarge_buffer_text (b
, 0);
5099 #endif /* USE_MMAP_FOR_BUFFERS */
5101 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5102 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5103 Fset_buffer_multibyte (Qnil
);
5105 pwd
= get_current_dir_name ();
5108 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5110 /* Maybe this should really use some standard subroutine
5111 whose definition is filename syntax dependent. */
5113 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5115 /* Grow buffer to add directory separator and '\0'. */
5116 pwd
= realloc (pwd
, len
+ 2);
5118 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5119 pwd
[len
] = DIRECTORY_SEP
;
5120 pwd
[len
+ 1] = '\0';
5124 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, len
);
5125 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5126 /* At this moment, we still don't know how to decode the
5127 directory name. So, we keep the bytes in multibyte form so
5128 that ENCODE_FILE correctly gets the original bytes. */
5129 BVAR (current_buffer
, directory
)
5130 = string_to_multibyte (BVAR (current_buffer
, directory
));
5132 /* Add /: to the front of the name
5133 if it would otherwise be treated as magic. */
5134 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5136 /* If the default dir is just /, TEMP is non-nil
5137 because of the ange-ftp completion handler.
5138 However, it is not necessary to turn / into /:/.
5139 So avoid doing that. */
5140 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5141 BVAR (current_buffer
, directory
)
5142 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5144 temp
= get_minibuffer (0);
5145 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5150 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5151 Object stored in the current buffer. address is the address of the slot
5152 in the buffer that is current now. */
5154 /* TYPE is nil for a general Lisp variable.
5155 An integer specifies a type; then only Lisp values
5156 with that type code are allowed (except that nil is allowed too).
5157 LNAME is the Lisp-level variable name.
5158 VNAME is the name of the buffer slot.
5159 DOC is a dummy where you write the doc string as a comment. */
5160 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5162 static struct Lisp_Buffer_Objfwd bo_fwd; \
5163 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5167 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5168 Lisp_Object
*address
, Lisp_Object type
)
5170 struct Lisp_Symbol
*sym
;
5173 sym
= XSYMBOL (intern (namestring
));
5174 offset
= (char *)address
- (char *)current_buffer
;
5176 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5177 bo_fwd
->offset
= offset
;
5178 bo_fwd
->slottype
= type
;
5179 sym
->declared_special
= 1;
5180 sym
->redirect
= SYMBOL_FORWARDED
;
5182 /* I tried to do the job without a cast, but it seems impossible.
5183 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5184 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5186 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5188 if (PER_BUFFER_IDX (offset
) == 0)
5189 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5190 slot of buffer_local_flags */
5195 /* initialize the buffer routines */
5197 syms_of_buffer (void)
5199 staticpro (&last_overlay_modification_hooks
);
5200 last_overlay_modification_hooks
5201 = Fmake_vector (make_number (10), Qnil
);
5203 staticpro (&Vbuffer_defaults
);
5204 staticpro (&Vbuffer_local_symbols
);
5205 staticpro (&Qfundamental_mode
);
5206 staticpro (&Qmode_class
);
5207 staticpro (&QSFundamental
);
5208 staticpro (&Vbuffer_alist
);
5209 staticpro (&Qprotected_field
);
5210 staticpro (&Qpermanent_local
);
5211 staticpro (&Qkill_buffer_hook
);
5213 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5214 DEFSYM (Qoverlayp
, "overlayp");
5215 DEFSYM (Qevaporate
, "evaporate");
5216 DEFSYM (Qmodification_hooks
, "modification-hooks");
5217 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5218 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5219 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5220 DEFSYM (Qpriority
, "priority");
5221 DEFSYM (Qbefore_string
, "before-string");
5222 DEFSYM (Qafter_string
, "after-string");
5223 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5224 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5225 DEFSYM (Qafter_change_functions
, "after-change-functions");
5226 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5228 Fput (Qprotected_field
, Qerror_conditions
,
5229 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5230 Fput (Qprotected_field
, Qerror_message
,
5231 build_pure_c_string ("Attempt to modify a protected field"));
5233 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5235 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5236 This is the same as (default-value 'mode-line-format). */);
5238 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5240 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5241 This is the same as (default-value 'header-line-format). */);
5243 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5244 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5245 This is the same as (default-value 'cursor-type). */);
5247 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5249 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5250 This is the same as (default-value 'line-spacing). */);
5252 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5253 cursor_in_non_selected_windows
,
5254 doc
: /* Default value of `cursor-in-non-selected-windows'.
5255 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5257 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5259 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5260 This is the same as (default-value 'abbrev-mode). */);
5262 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5264 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5265 This is the same as (default-value 'ctl-arrow). */);
5267 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5268 enable_multibyte_characters
,
5269 doc
: /* Default value of `enable-multibyte-characters' for buffers not overriding it.
5270 This is the same as (default-value 'enable-multibyte-characters). */);
5272 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5273 buffer_file_coding_system
,
5274 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5275 This is the same as (default-value 'buffer-file-coding-system). */);
5277 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5279 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5280 This is the same as (default-value 'truncate-lines). */);
5282 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5284 doc
: /* Default value of `fill-column' for buffers that do not override it.
5285 This is the same as (default-value 'fill-column). */);
5287 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5289 doc
: /* Default value of `left-margin' for buffers that do not override it.
5290 This is the same as (default-value 'left-margin). */);
5292 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5294 doc
: /* Default value of `tab-width' for buffers that do not override it.
5295 This is the same as (default-value 'tab-width). */);
5297 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5299 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5300 This is the same as (default-value 'case-fold-search). */);
5302 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5304 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5305 This is the same as (default-value 'left-margin-width). */);
5307 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5309 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5310 This is the same as (default-value 'right-margin-width). */);
5312 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5314 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5315 This is the same as (default-value 'left-fringe-width). */);
5317 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5319 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5320 This is the same as (default-value 'right-fringe-width). */);
5322 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5323 fringes_outside_margins
,
5324 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5325 This is the same as (default-value 'fringes-outside-margins). */);
5327 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5329 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5330 This is the same as (default-value 'scroll-bar-width). */);
5332 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5333 vertical_scroll_bar_type
,
5334 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5335 This is the same as (default-value 'vertical-scroll-bar). */);
5337 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5338 indicate_empty_lines
,
5339 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5340 This is the same as (default-value 'indicate-empty-lines). */);
5342 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5343 indicate_buffer_boundaries
,
5344 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5345 This is the same as (default-value 'indicate-buffer-boundaries). */);
5347 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5348 fringe_indicator_alist
,
5349 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5350 This is the same as (default-value 'fringe-indicator-alist'). */);
5352 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5353 fringe_cursor_alist
,
5354 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5355 This is the same as (default-value 'fringe-cursor-alist'). */);
5357 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5358 scroll_up_aggressively
,
5359 doc
: /* Default value of `scroll-up-aggressively'.
5360 This value applies in buffers that don't have their own local values.
5361 This is the same as (default-value 'scroll-up-aggressively). */);
5363 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5364 scroll_down_aggressively
,
5365 doc
: /* Default value of `scroll-down-aggressively'.
5366 This value applies in buffers that don't have their own local values.
5367 This is the same as (default-value 'scroll-down-aggressively). */);
5369 DEFVAR_PER_BUFFER ("header-line-format",
5370 &BVAR (current_buffer
, header_line_format
),
5372 doc
: /* Analogous to `mode-line-format', but controls the header line.
5373 The header line appears, optionally, at the top of a window;
5374 the mode line appears at the bottom. */);
5376 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5378 doc
: /* Template for displaying mode line for current buffer.
5380 The value may be nil, a string, a symbol or a list.
5382 A value of nil means don't display a mode line.
5384 For any symbol other than t or nil, the symbol's value is processed as
5385 a mode line construct. As a special exception, if that value is a
5386 string, the string is processed verbatim, without handling any
5387 %-constructs (see below). Also, unless the symbol has a non-nil
5388 `risky-local-variable' property, all properties in any strings, as
5389 well as all :eval and :propertize forms in the value, are ignored.
5391 A list whose car is a string or list is processed by processing each
5392 of the list elements recursively, as separate mode line constructs,
5393 and concatenating the results.
5395 A list of the form `(:eval FORM)' is processed by evaluating FORM and
5396 using the result as a mode line construct. Be careful--FORM should
5397 not load any files, because that can cause an infinite recursion.
5399 A list of the form `(:propertize ELT PROPS...)' is processed by
5400 processing ELT as the mode line construct, and adding the text
5401 properties PROPS to the result.
5403 A list whose car is a symbol is processed by examining the symbol's
5404 value, and, if that value is non-nil, processing the cadr of the list
5405 recursively; and if that value is nil, processing the caddr of the
5408 A list whose car is an integer is processed by processing the cadr of
5409 the list, and padding (if the number is positive) or truncating (if
5410 negative) to the width specified by that number.
5412 A string is printed verbatim in the mode line except for %-constructs:
5413 %b -- print buffer name. %f -- print visited file name.
5414 %F -- print frame name.
5415 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5416 %& is like %*, but ignore read-only-ness.
5417 % means buffer is read-only and * means it is modified.
5418 For a modified read-only buffer, %* gives % and %+ gives *.
5419 %s -- print process status. %l -- print the current line number.
5420 %c -- print the current column number (this makes editing slower).
5421 To make the column number update correctly in all cases,
5422 `column-number-mode' must be non-nil.
5423 %i -- print the size of the buffer.
5424 %I -- like %i, but use k, M, G, etc., to abbreviate.
5425 %p -- print percent of buffer above top of window, or Top, Bot or All.
5426 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5427 or print Bottom or All.
5428 %n -- print Narrow if appropriate.
5429 %t -- visited file is text or binary (if OS supports this distinction).
5430 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5431 %Z -- like %z, but including the end-of-line format.
5432 %e -- print error message about full memory.
5433 %@ -- print @ or hyphen. @ means that default-directory is on a
5435 %[ -- print one [ for each recursive editing level. %] similar.
5436 %% -- print %. %- -- print infinitely many dashes.
5437 Decimal digits after the % specify field width to which to pad. */);
5439 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5440 doc
: /* Value of `major-mode' for new buffers. */);
5442 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5443 make_number (Lisp_Symbol
),
5444 doc
: /* Symbol for current buffer's major mode.
5445 The default value (normally `fundamental-mode') affects new buffers.
5446 A value of nil means to use the current buffer's major mode, provided
5447 it is not marked as "special".
5449 When a mode is used by default, `find-file' switches to it before it
5450 reads the contents into the buffer and before it finishes setting up
5451 the buffer. Thus, the mode and its hooks should not expect certain
5452 variables such as `buffer-read-only' and `buffer-file-coding-system'
5455 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5457 doc
: /* Pretty name of current buffer's major mode.
5458 Usually a string, but can use any of the constructs for `mode-line-format',
5460 Format with `format-mode-line' to produce a string value. */);
5462 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5463 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5465 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5466 doc
: /* Non-nil if Abbrev mode is enabled.
5467 Use the command `abbrev-mode' to change this variable. */);
5469 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5471 doc
: /* Non-nil if searches and matches should ignore case. */);
5473 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5474 make_number (LISP_INT_TAG
),
5475 doc
: /* Column beyond which automatic line-wrapping should happen.
5476 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5478 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5479 make_number (LISP_INT_TAG
),
5480 doc
: /* Column for the default `indent-line-function' to indent to.
5481 Linefeed indents to this column in Fundamental mode. */);
5483 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5484 make_number (LISP_INT_TAG
),
5485 doc
: /* Distance between tab stops (for display of tab characters), in columns.
5486 This should be an integer greater than zero. */);
5488 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5489 doc
: /* Non-nil means display control chars with uparrow.
5490 A value of nil means use backslash and octal digits.
5491 This variable does not apply to characters whose display is specified
5492 in the current display table (if there is one). */);
5494 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5495 &BVAR (current_buffer
, enable_multibyte_characters
),
5497 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5498 Otherwise they are regarded as unibyte. This affects the display,
5499 file I/O and the behavior of various editing commands.
5501 This variable is buffer-local but you cannot set it directly;
5502 use the function `set-buffer-multibyte' to change a buffer's representation.
5503 See also Info node `(elisp)Text Representations'. */);
5504 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5506 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5507 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5508 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5509 This variable applies to saving the buffer, and also to `write-region'
5510 and other functions that use `write-region'.
5511 It does not apply to sending output to subprocesses, however.
5513 If this is nil, the buffer is saved without any code conversion
5514 unless some coding system is specified in `file-coding-system-alist'
5515 for the buffer file.
5517 If the text to be saved cannot be encoded as specified by this variable,
5518 an alternative encoding is selected by `select-safe-coding-system', which see.
5520 The variable `coding-system-for-write', if non-nil, overrides this variable.
5522 This variable is never applied to a way of decoding a file while reading it. */);
5524 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5525 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5526 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5528 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5529 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5530 doc
: /* If non-nil, forces directionality of text paragraphs in the buffer.
5532 If this is nil (the default), the direction of each paragraph is
5533 determined by the first strong directional character of its text.
5534 The values of `right-to-left' and `left-to-right' override that.
5535 Any other value is treated as nil.
5537 This variable has no effect unless the buffer's value of
5538 \`bidi-display-reordering' is non-nil. */);
5540 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5541 doc
: /* Non-nil means do not display continuation lines.
5542 Instead, give each line of text just one screen line.
5544 Note that this is overridden by the variable
5545 `truncate-partial-width-windows' if that variable is non-nil
5546 and this buffer is not full-frame width.
5548 Minibuffers set this variable to nil. */);
5550 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5551 doc
: /* Non-nil means to use word-wrapping for continuation lines.
5552 When word-wrapping is on, continuation lines are wrapped at the space
5553 or tab character nearest to the right window edge.
5554 If nil, continuation lines are wrapped at the right screen edge.
5556 This variable has no effect if long lines are truncated (see
5557 `truncate-lines' and `truncate-partial-width-windows'). If you use
5558 word-wrapping, you might want to reduce the value of
5559 `truncate-partial-width-windows', since wrapping can make text readable
5560 in narrower windows.
5562 Instead of setting this variable directly, most users should use
5563 Visual Line mode . Visual Line mode, when enabled, sets `word-wrap'
5564 to t, and additionally redefines simple editing commands to act on
5565 visual lines rather than logical lines. See the documentation of
5566 `visual-line-mode'. */);
5568 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5569 make_number (Lisp_String
),
5570 doc
: /* Name of default directory of current buffer. Should end with slash.
5571 To interactively change the default directory, use command `cd'. */);
5573 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5575 doc
: /* Function called (if non-nil) to perform auto-fill.
5576 It is called after self-inserting any character specified in
5577 the `auto-fill-chars' table.
5578 NOTE: This variable is not a hook;
5579 its value may not be a list of functions. */);
5581 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5582 make_number (Lisp_String
),
5583 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5585 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5586 make_number (Lisp_String
),
5587 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5588 The truename of a file is calculated by `file-truename'
5589 and then abbreviated with `abbreviate-file-name'. */);
5591 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5592 &BVAR (current_buffer
, auto_save_file_name
),
5593 make_number (Lisp_String
),
5594 doc
: /* Name of file for auto-saving current buffer.
5595 If it is nil, that means don't auto-save this buffer. */);
5597 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5598 doc
: /* Non-nil if this buffer is read-only. */);
5600 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5601 doc
: /* Non-nil if this buffer's file has been backed up.
5602 Backing up is done before the first time the file is saved. */);
5604 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5605 make_number (LISP_INT_TAG
),
5606 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5608 -1 means auto-saving turned off until next real save.
5610 If you set this to -2, that means don't turn off auto-saving in this buffer
5611 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5612 you probably should set this to -2 in that buffer. */);
5614 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5616 doc
: /* Non-nil enables selective display.
5617 An integer N as value means display only lines
5618 that start with less than N columns of space.
5619 A value of t means that the character ^M makes itself and
5620 all the rest of the line invisible; also, when saving the buffer
5621 in a file, save the ^M as a newline. */);
5623 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5624 &BVAR (current_buffer
, selective_display_ellipses
),
5626 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5628 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5629 doc
: /* Non-nil if self-insertion should replace existing text.
5630 The value should be one of `overwrite-mode-textual',
5631 `overwrite-mode-binary', or nil.
5632 If it is `overwrite-mode-textual', self-insertion still
5633 inserts at the end of a line, and inserts when point is before a tab,
5634 until the tab is filled in.
5635 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5637 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5639 doc
: /* Display table that controls display of the contents of current buffer.
5641 If this variable is nil, the value of `standard-display-table' is used.
5642 Each window can have its own, overriding display table, see
5643 `set-window-display-table' and `window-display-table'.
5645 The display table is a char-table created with `make-display-table'.
5646 A char-table is an array indexed by character codes. Normal array
5647 primitives `aref' and `aset' can be used to access elements of a char-table.
5649 Each of the char-table elements control how to display the corresponding
5650 text character: the element at index C in the table says how to display
5651 the character whose code is C. Each element should be a vector of
5652 characters or nil. The value nil means display the character in the
5653 default fashion; otherwise, the characters from the vector are delivered
5654 to the screen instead of the original character.
5656 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5657 to display a capital Y instead of each X character.
5659 In addition, a char-table has six extra slots to control the display of:
5661 the end of a truncated screen line (extra-slot 0, a single character);
5662 the end of a continued line (extra-slot 1, a single character);
5663 the escape character used to display character codes in octal
5664 (extra-slot 2, a single character);
5665 the character used as an arrow for control characters (extra-slot 3,
5666 a single character);
5667 the decoration indicating the presence of invisible lines (extra-slot 4,
5668 a vector of characters);
5669 the character used to draw the border between side-by-side windows
5670 (extra-slot 5, a single character).
5672 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5674 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5676 doc
: /* Width of left marginal area for display of a buffer.
5677 A value of nil means no marginal area. */);
5679 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5681 doc
: /* Width of right marginal area for display of a buffer.
5682 A value of nil means no marginal area. */);
5684 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5686 doc
: /* Width of this buffer's left fringe (in pixels).
5687 A value of 0 means no left fringe is shown in this buffer's window.
5688 A value of nil means to use the left fringe width from the window's frame. */);
5690 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5692 doc
: /* Width of this buffer's right fringe (in pixels).
5693 A value of 0 means no right fringe is shown in this buffer's window.
5694 A value of nil means to use the right fringe width from the window's frame. */);
5696 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5698 doc
: /* Non-nil means to display fringes outside display margins.
5699 A value of nil means to display fringes between margins and buffer text. */);
5701 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5703 doc
: /* Width of this buffer's scroll bars in pixels.
5704 A value of nil means to use the scroll bar width from the window's frame. */);
5706 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5708 doc
: /* Position of this buffer's vertical scroll bar.
5709 The value takes effect whenever you tell a window to display this buffer;
5710 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5712 A value of `left' or `right' means put the vertical scroll bar at that side
5713 of the window; a value of nil means don't show any vertical scroll bars.
5714 A value of t (the default) means do whatever the window's frame specifies. */);
5716 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5717 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5718 doc
: /* Visually indicate empty lines after the buffer end.
5719 If non-nil, a bitmap is displayed in the left fringe of a window on
5720 window-systems. */);
5722 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5723 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5724 doc
: /* Visually indicate buffer boundaries and scrolling.
5725 If non-nil, the first and last line of the buffer are marked in the fringe
5726 of a window on window-systems with angle bitmaps, or if the window can be
5727 scrolled, the top and bottom line of the window are marked with up and down
5730 If value is a symbol `left' or `right', both angle and arrow bitmaps
5731 are displayed in the left or right fringe, resp. Any other value
5732 that doesn't look like an alist means display the angle bitmaps in
5733 the left fringe but no arrows.
5735 You can exercise more precise control by using an alist as the
5736 value. Each alist element (INDICATOR . POSITION) specifies
5737 where to show one of the indicators. INDICATOR is one of `top',
5738 `bottom', `up', `down', or t, which specifies the default position,
5739 and POSITION is one of `left', `right', or nil, meaning do not show
5742 For example, ((top . left) (t . right)) places the top angle bitmap in
5743 left fringe, the bottom angle bitmap in right fringe, and both arrow
5744 bitmaps in right fringe. To show just the angle bitmaps in the left
5745 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5747 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5748 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5749 doc
: /* Mapping from logical to physical fringe indicator bitmaps.
5750 The value is an alist where each element (INDICATOR . BITMAPS)
5751 specifies the fringe bitmaps used to display a specific logical
5754 INDICATOR specifies the logical indicator type which is one of the
5755 following symbols: `truncation' , `continuation', `overlay-arrow',
5756 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5758 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5759 the actual bitmap shown in the left or right fringe for the logical
5760 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5761 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5762 are used only for the `bottom' and `top-bottom' indicators when the
5763 last (only) line has no final newline. BITMAPS may also be a single
5764 symbol which is used in both left and right fringes. */);
5766 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5767 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5768 doc
: /* Mapping from logical to physical fringe cursor bitmaps.
5769 The value is an alist where each element (CURSOR . BITMAP)
5770 specifies the fringe bitmaps used to display a specific logical
5771 cursor type in the fringe.
5773 CURSOR specifies the logical cursor type which is one of the following
5774 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5775 one is used to show a hollow cursor on narrow lines display lines
5776 where the normal hollow cursor will not fit.
5778 BITMAP is the corresponding fringe bitmap shown for the logical
5781 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5782 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5783 doc
: /* How far to scroll windows upward.
5784 If you move point off the bottom, the window scrolls automatically.
5785 This variable controls how far it scrolls. The value nil, the default,
5786 means scroll to center point. A fraction means scroll to put point
5787 that fraction of the window's height from the bottom of the window.
5788 When the value is 0.0, point goes at the bottom line, which in the
5789 simple case that you moved off with C-f means scrolling just one line.
5790 1.0 means point goes at the top, so that in that simple case, the
5791 window scrolls by a full window height. Meaningful values are
5792 between 0.0 and 1.0, inclusive. */);
5794 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5795 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5796 doc
: /* How far to scroll windows downward.
5797 If you move point off the top, the window scrolls automatically.
5798 This variable controls how far it scrolls. The value nil, the default,
5799 means scroll to center point. A fraction means scroll to put point
5800 that fraction of the window's height from the top of the window.
5801 When the value is 0.0, point goes at the top line, which in the
5802 simple case that you moved off with C-b means scrolling just one line.
5803 1.0 means point goes at the bottom, so that in that simple case, the
5804 window scrolls by a full window height. Meaningful values are
5805 between 0.0 and 1.0, inclusive. */);
5807 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5811 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5812 doc
: /* List of functions to call before each text change.
5813 Two arguments are passed to each function: the positions of
5814 the beginning and end of the range of old text to be changed.
5815 \(For an insertion, the beginning and end are at the same place.)
5816 No information is given about the length of the text after the change.
5818 Buffer changes made while executing the `before-change-functions'
5819 don't call any before-change or after-change functions.
5820 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5822 If an unhandled error happens in running these functions,
5823 the variable's value remains nil. That prevents the error
5824 from happening repeatedly and making Emacs nonfunctional. */);
5825 Vbefore_change_functions
= Qnil
;
5827 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5828 doc
: /* List of functions to call after each text change.
5829 Three arguments are passed to each function: the positions of
5830 the beginning and end of the range of changed text,
5831 and the length in bytes of the pre-change text replaced by that range.
5832 \(For an insertion, the pre-change length is zero;
5833 for a deletion, that length is the number of bytes deleted,
5834 and the post-change beginning and end are at the same place.)
5836 Buffer changes made while executing the `after-change-functions'
5837 don't call any before-change or after-change functions.
5838 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5840 If an unhandled error happens in running these functions,
5841 the variable's value remains nil. That prevents the error
5842 from happening repeatedly and making Emacs nonfunctional. */);
5843 Vafter_change_functions
= Qnil
;
5845 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5846 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5847 The functions are run using the `run-hooks' function. */);
5848 Vfirst_change_hook
= Qnil
;
5850 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5851 doc
: /* List of undo entries in current buffer.
5852 Recent changes come first; older changes follow newer.
5854 An entry (BEG . END) represents an insertion which begins at
5855 position BEG and ends at position END.
5857 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5858 from (abs POSITION). If POSITION is positive, point was at the front
5859 of the text being deleted; if negative, point was at the end.
5861 An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously
5862 unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time)
5863 and is the visited file's modification time, as of that time. If the
5864 modification time of the most recent save is different, this entry is
5867 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5868 was modified between BEG and END. PROPERTY is the property name,
5869 and VALUE is the old value.
5871 An entry (apply FUN-NAME . ARGS) means undo the change with
5872 \(apply FUN-NAME ARGS).
5874 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5875 in the active region. BEG and END is the range affected by this entry
5876 and DELTA is the number of bytes added or deleted in that range by
5879 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5880 was adjusted in position by the offset DISTANCE (an integer).
5882 An entry of the form POSITION indicates that point was at the buffer
5883 location given by the integer. Undoing an entry of this form places
5886 Entries with value `nil' mark undo boundaries. The undo command treats
5887 the changes between two undo boundaries as a single step to be undone.
5889 If the value of the variable is t, undo information is not recorded. */);
5891 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5892 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5894 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5895 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5897 Normally, the line-motion functions work by scanning the buffer for
5898 newlines. Columnar operations (like `move-to-column' and
5899 `compute-motion') also work by scanning the buffer, summing character
5900 widths as they go. This works well for ordinary text, but if the
5901 buffer's lines are very long (say, more than 500 characters), these
5902 motion functions will take longer to execute. Emacs may also take
5903 longer to update the display.
5905 If `cache-long-line-scans' is non-nil, these motion functions cache the
5906 results of their scans, and consult the cache to avoid rescanning
5907 regions of the buffer until the text is modified. The caches are most
5908 beneficial when they prevent the most searching---that is, when the
5909 buffer contains long lines and large regions of characters with the
5910 same, fixed screen width.
5912 When `cache-long-line-scans' is non-nil, processing short lines will
5913 become slightly slower (because of the overhead of consulting the
5914 cache), and the caches will use memory roughly proportional to the
5915 number of newlines and characters whose screen width varies.
5917 The caches require no explicit maintenance; their accuracy is
5918 maintained internally by the Emacs primitives. Enabling or disabling
5919 the cache should not affect the behavior of any of the motion
5920 functions; it should only affect their performance. */);
5922 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5923 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5925 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5926 doc
: /* List of formats to use when saving this buffer.
5927 Formats are defined by `format-alist'. This variable is
5928 set when a file is visited. */);
5930 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5931 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5932 doc
: /* Format in which to write auto-save files.
5933 Should be a list of symbols naming formats that are defined in `format-alist'.
5934 If it is t, which is the default, auto-save files are written in the
5935 same format as a regular save would use. */);
5937 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5938 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5939 doc
: /* Invisibility spec of this buffer.
5940 The default is t, which means that text is invisible
5941 if it has a non-nil `invisible' property.
5942 If the value is a list, a text character is invisible if its `invisible'
5943 property is an element in that list (or is a list with members in common).
5944 If an element is a cons cell of the form (PROP . ELLIPSIS),
5945 then characters with property value PROP are invisible,
5946 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5948 DEFVAR_PER_BUFFER ("buffer-display-count",
5949 &BVAR (current_buffer
, display_count
), Qnil
,
5950 doc
: /* A number incremented each time this buffer is displayed in a window.
5951 The function `set-window-buffer' increments it. */);
5953 DEFVAR_PER_BUFFER ("buffer-display-time",
5954 &BVAR (current_buffer
, display_time
), Qnil
,
5955 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5956 The function `set-window-buffer' updates this variable
5957 to the value obtained by calling `current-time'.
5958 If the buffer has never been shown in a window, the value is nil. */);
5960 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5961 doc
: /* Non-nil if Transient Mark mode is enabled.
5962 See the command `transient-mark-mode' for a description of this minor mode.
5964 Non-nil also enables highlighting of the region whenever the mark is active.
5965 The variable `highlight-nonselected-windows' controls whether to highlight
5966 all windows or just the selected window.
5968 Lisp programs may give this variable certain special values:
5970 - A value of `lambda' enables Transient Mark mode temporarily.
5971 It is disabled again after any subsequent action that would
5972 normally deactivate the mark (e.g. buffer modification).
5974 - A value of (only . OLDVAL) enables Transient Mark mode
5975 temporarily. After any subsequent point motion command that is
5976 not shift-translated, or any other action that would normally
5977 deactivate the mark (e.g. buffer modification), the value of
5978 `transient-mark-mode' is set to OLDVAL. */);
5979 Vtransient_mark_mode
= Qnil
;
5981 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5982 doc
: /* Non-nil means disregard read-only status of buffers or characters.
5983 If the value is t, disregard `buffer-read-only' and all `read-only'
5984 text properties. If the value is a list, disregard `buffer-read-only'
5985 and disregard a `read-only' text property if the property value
5986 is a member of the list. */);
5987 Vinhibit_read_only
= Qnil
;
5989 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5990 doc
: /* Cursor to use when this buffer is in the selected window.
5991 Values are interpreted as follows:
5993 t use the cursor specified for the frame
5994 nil don't display a cursor
5995 box display a filled box cursor
5996 hollow display a hollow box cursor
5997 bar display a vertical bar cursor with default width
5998 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5999 hbar display a horizontal bar cursor with default height
6000 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6001 ANYTHING ELSE display a hollow box cursor
6003 When the buffer is displayed in a non-selected window, the
6004 cursor's appearance is instead controlled by the variable
6005 `cursor-in-non-selected-windows'. */);
6007 DEFVAR_PER_BUFFER ("line-spacing",
6008 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
6009 doc
: /* Additional space to put between lines when displaying a buffer.
6010 The space is measured in pixels, and put below lines on graphic displays,
6011 see `display-graphic-p'.
6012 If value is a floating point number, it specifies the spacing relative
6013 to the default frame line height. A value of nil means add no extra space. */);
6015 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6016 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
6017 doc
: /* Non-nil means show a cursor in non-selected windows.
6018 If nil, only shows a cursor in the selected window.
6019 If t, displays a cursor related to the usual cursor type
6020 \(a solid box becomes hollow, a bar becomes a narrower bar).
6021 You can also specify the cursor type as in the `cursor-type' variable.
6022 Use Custom to set this variable and update the display." */);
6024 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
6025 doc
: /* List of functions called with no args to query before killing a buffer.
6026 The buffer being killed will be current while the functions are running.
6028 If any of them returns nil, the buffer is not killed. Functions run by
6029 this hook are supposed to not change the current buffer. */);
6030 Vkill_buffer_query_functions
= Qnil
;
6032 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
6033 doc
: /* Normal hook run before changing the major mode of a buffer.
6034 The function `kill-all-local-variables' runs this before doing anything else. */);
6035 Vchange_major_mode_hook
= Qnil
;
6036 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
6038 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
6039 doc
: /* Hook run when the buffer list changes.
6040 Functions running this hook are `get-buffer-create',
6041 `make-indirect-buffer', `rename-buffer', `kill-buffer',
6042 and `bury-buffer-internal'. */);
6043 Vbuffer_list_update_hook
= Qnil
;
6044 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
6046 defsubr (&Sbuffer_live_p
);
6047 defsubr (&Sbuffer_list
);
6048 defsubr (&Sget_buffer
);
6049 defsubr (&Sget_file_buffer
);
6050 defsubr (&Sget_buffer_create
);
6051 defsubr (&Smake_indirect_buffer
);
6052 defsubr (&Sgenerate_new_buffer_name
);
6053 defsubr (&Sbuffer_name
);
6054 defsubr (&Sbuffer_file_name
);
6055 defsubr (&Sbuffer_base_buffer
);
6056 defsubr (&Sbuffer_local_value
);
6057 defsubr (&Sbuffer_local_variables
);
6058 defsubr (&Sbuffer_modified_p
);
6059 defsubr (&Sset_buffer_modified_p
);
6060 defsubr (&Sbuffer_modified_tick
);
6061 defsubr (&Sbuffer_chars_modified_tick
);
6062 defsubr (&Srename_buffer
);
6063 defsubr (&Sother_buffer
);
6064 defsubr (&Sbuffer_enable_undo
);
6065 defsubr (&Skill_buffer
);
6066 defsubr (&Sbury_buffer_internal
);
6067 defsubr (&Sset_buffer_major_mode
);
6068 defsubr (&Scurrent_buffer
);
6069 defsubr (&Sset_buffer
);
6070 defsubr (&Sbarf_if_buffer_read_only
);
6071 defsubr (&Serase_buffer
);
6072 defsubr (&Sbuffer_swap_text
);
6073 defsubr (&Sset_buffer_multibyte
);
6074 defsubr (&Skill_all_local_variables
);
6076 defsubr (&Soverlayp
);
6077 defsubr (&Smake_overlay
);
6078 defsubr (&Sdelete_overlay
);
6079 defsubr (&Smove_overlay
);
6080 defsubr (&Soverlay_start
);
6081 defsubr (&Soverlay_end
);
6082 defsubr (&Soverlay_buffer
);
6083 defsubr (&Soverlay_properties
);
6084 defsubr (&Soverlays_at
);
6085 defsubr (&Soverlays_in
);
6086 defsubr (&Snext_overlay_change
);
6087 defsubr (&Sprevious_overlay_change
);
6088 defsubr (&Soverlay_recenter
);
6089 defsubr (&Soverlay_lists
);
6090 defsubr (&Soverlay_get
);
6091 defsubr (&Soverlay_put
);
6092 defsubr (&Srestore_buffer_modified_p
);
6096 keys_of_buffer (void)
6098 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6099 initial_define_key (control_x_map
, 'k', "kill-buffer");
6101 /* This must not be in syms_of_buffer, because Qdisabled is not
6102 initialized when that function gets called. */
6103 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);