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"
37 #include "character.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
45 struct buffer
*current_buffer
; /* the current buffer */
47 /* First buffer in chain of all buffers (in reverse order of creation).
48 Threaded through ->header.next.buffer. */
50 struct buffer
*all_buffers
;
52 /* This structure holds the default values of the buffer-local variables
53 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
54 The default value occupies the same slot in this structure
55 as an individual buffer's value occupies in that buffer.
56 Setting the default value also goes through the alist of buffers
57 and stores into each buffer that does not say it has a local value. */
59 DECL_ALIGN (struct buffer
, buffer_defaults
);
61 /* A Lisp_Object pointer to the above, used for staticpro */
63 static Lisp_Object Vbuffer_defaults
;
65 /* This structure marks which slots in a buffer have corresponding
66 default values in buffer_defaults.
67 Each such slot has a nonzero value in this structure.
68 The value has only one nonzero bit.
70 When a buffer has its own local value for a slot,
71 the entry for that slot (found in the same slot in this structure)
72 is turned on in the buffer's local_flags array.
74 If a slot in this structure is -1, then even though there may
75 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
76 and the corresponding slot in buffer_defaults is not used.
78 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
79 zero, that is a bug */
81 struct buffer buffer_local_flags
;
83 /* This structure holds the names of symbols whose values may be
84 buffer-local. It is indexed and accessed in the same way as the above. */
86 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
88 /* A Lisp_Object pointer to the above, used for staticpro */
89 static Lisp_Object Vbuffer_local_symbols
;
91 /* Return the symbol of the per-buffer variable at offset OFFSET in
92 the buffer structure. */
94 #define PER_BUFFER_SYMBOL(OFFSET) \
95 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
97 /* Maximum length of an overlay vector. */
98 #define OVERLAY_COUNT_MAX \
99 ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \
100 min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object)))
102 /* Flags indicating which built-in buffer-local variables
103 are permanent locals. */
104 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
106 /* Number of per-buffer variables used. */
108 int last_per_buffer_idx
;
110 static Lisp_Object
Fset_buffer_major_mode (Lisp_Object
);
111 static Lisp_Object
Fdelete_overlay (Lisp_Object
);
112 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
113 int after
, Lisp_Object arg1
,
114 Lisp_Object arg2
, Lisp_Object arg3
);
115 static void swap_out_buffer_local_variables (struct buffer
*b
);
116 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
118 /* Alist of all buffer names vs the buffers. */
119 /* This used to be a variable, but is no longer,
120 to prevent lossage due to user rplac'ing this alist or its elements. */
121 Lisp_Object Vbuffer_alist
;
123 static Lisp_Object Qkill_buffer_query_functions
;
125 /* Hook run before changing a major mode. */
126 static Lisp_Object Qchange_major_mode_hook
;
128 Lisp_Object Qfirst_change_hook
;
129 Lisp_Object Qbefore_change_functions
;
130 Lisp_Object Qafter_change_functions
;
132 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
133 static Lisp_Object Qpermanent_local_hook
;
135 static Lisp_Object Qprotected_field
;
137 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
139 static Lisp_Object Qkill_buffer_hook
;
140 static Lisp_Object Qbuffer_list_update_hook
;
142 static Lisp_Object Qget_file_buffer
;
144 static Lisp_Object Qoverlayp
;
146 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
148 static Lisp_Object Qevaporate
;
150 Lisp_Object Qmodification_hooks
;
151 Lisp_Object Qinsert_in_front_hooks
;
152 Lisp_Object Qinsert_behind_hooks
;
154 static void alloc_buffer_text (struct buffer
*, ptrdiff_t);
155 static void free_buffer_text (struct buffer
*b
);
156 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
157 static void modify_overlay (struct buffer
*, ptrdiff_t, ptrdiff_t);
158 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*);
160 /* For debugging; temporary. See set_buffer_internal. */
161 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
164 nsberror (Lisp_Object spec
)
167 error ("No buffer named %s", SDATA (spec
));
168 error ("Invalid buffer argument");
171 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
172 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
173 Value is nil if OBJECT is not a buffer or if it has been killed. */)
176 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
180 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
181 doc
: /* Return a list of all existing live buffers.
182 If the optional arg FRAME is a frame, we return the buffer list in the
183 proper order for that frame: the buffers show in FRAME come first,
184 followed by the rest of the buffers. */)
188 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
192 Lisp_Object framelist
, prevlist
, tail
;
196 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
197 prevlist
= Fnreverse (Fcopy_sequence
198 (XFRAME (frame
)->buried_buffer_list
));
200 /* Remove from GENERAL any buffer that duplicates one in
201 FRAMELIST or PREVLIST. */
205 general
= Fdelq (XCAR (tail
), general
);
211 general
= Fdelq (XCAR (tail
), general
);
218 return Fnconc (3, args
);
224 /* Like Fassoc, but use Fstring_equal to compare
225 (which ignores text properties),
226 and don't ever QUIT. */
229 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
231 register Lisp_Object tail
;
232 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
234 register Lisp_Object elt
, tem
;
236 tem
= Fstring_equal (Fcar (elt
), key
);
243 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
244 doc
: /* Return the buffer named BUFFER-OR-NAME.
245 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
246 is a string and there is no buffer with that name, return nil. If
247 BUFFER-OR-NAME is a buffer, return it as given. */)
248 (register Lisp_Object buffer_or_name
)
250 if (BUFFERP (buffer_or_name
))
251 return buffer_or_name
;
252 CHECK_STRING (buffer_or_name
);
254 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
257 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
258 doc
: /* Return the buffer visiting file FILENAME (a string).
259 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
260 If there is no such live buffer, return nil.
261 See also `find-buffer-visiting'. */)
262 (register Lisp_Object filename
)
264 register Lisp_Object tail
, buf
, tem
;
267 CHECK_STRING (filename
);
268 filename
= Fexpand_file_name (filename
, Qnil
);
270 /* If the file name has special constructs in it,
271 call the corresponding file handler. */
272 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
275 Lisp_Object handled_buf
= call2 (handler
, Qget_file_buffer
,
277 return BUFFERP (handled_buf
) ? handled_buf
: Qnil
;
280 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
282 buf
= Fcdr (XCAR (tail
));
283 if (!BUFFERP (buf
)) continue;
284 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
285 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
293 get_truename_buffer (register Lisp_Object filename
)
295 register Lisp_Object tail
, buf
, tem
;
297 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
299 buf
= Fcdr (XCAR (tail
));
300 if (!BUFFERP (buf
)) continue;
301 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
302 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
309 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
310 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
311 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
312 return that buffer. If no such buffer exists, create a new buffer with
313 that name and return it. If BUFFER-OR-NAME starts with a space, the new
314 buffer does not keep undo information.
316 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
317 even if it is dead. The return value is never nil. */)
318 (register Lisp_Object buffer_or_name
)
320 register Lisp_Object buffer
, name
;
321 register struct buffer
*b
;
323 buffer
= Fget_buffer (buffer_or_name
);
327 if (SCHARS (buffer_or_name
) == 0)
328 error ("Empty string for buffer name is not allowed");
330 b
= allocate_buffer ();
332 /* An ordinary buffer uses its own struct buffer_text. */
333 b
->text
= &b
->own_text
;
336 BUF_GAP_SIZE (b
) = 20;
338 /* We allocate extra 1-byte at the tail and keep it always '\0' for
339 anchoring a search. */
340 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
342 if (! BUF_BEG_ADDR (b
))
343 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
348 b
->pt_byte
= BEG_BYTE
;
349 b
->begv_byte
= BEG_BYTE
;
350 b
->zv_byte
= BEG_BYTE
;
353 BUF_GPT_BYTE (b
) = BEG_BYTE
;
356 BUF_Z_BYTE (b
) = BEG_BYTE
;
358 BUF_CHARS_MODIFF (b
) = 1;
359 BUF_OVERLAY_MODIFF (b
) = 1;
360 BUF_SAVE_MODIFF (b
) = 1;
361 BUF_INTERVALS (b
) = 0;
362 BUF_UNCHANGED_MODIFIED (b
) = 1;
363 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
364 BUF_END_UNCHANGED (b
) = 0;
365 BUF_BEG_UNCHANGED (b
) = 0;
366 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
367 b
->text
->inhibit_shrinking
= 0;
369 b
->newline_cache
= 0;
370 b
->width_run_cache
= 0;
371 BVAR (b
, width_table
) = Qnil
;
372 b
->prevent_redisplay_optimizations_p
= 1;
374 /* Put this on the chain of all buffers including killed ones. */
375 b
->header
.next
.buffer
= all_buffers
;
378 /* An ordinary buffer normally doesn't need markers
379 to handle BEGV and ZV. */
380 BVAR (b
, pt_marker
) = Qnil
;
381 BVAR (b
, begv_marker
) = Qnil
;
382 BVAR (b
, zv_marker
) = Qnil
;
384 name
= Fcopy_sequence (buffer_or_name
);
385 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
386 BVAR (b
, name
) = name
;
388 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
391 reset_buffer_local_variables (b
, 1);
393 BVAR (b
, mark
) = Fmake_marker ();
394 BUF_MARKERS (b
) = NULL
;
395 BVAR (b
, name
) = name
;
397 /* Put this in the alist of all live buffers. */
398 XSETBUFFER (buffer
, b
);
399 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
400 /* And run buffer-list-update-hook. */
401 if (!NILP (Vrun_hooks
))
402 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
408 /* Return a list of overlays which is a copy of the overlay list
409 LIST, but for buffer B. */
411 static struct Lisp_Overlay
*
412 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
415 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
417 XSETBUFFER (buffer
, b
);
419 for (; list
; list
= list
->next
)
421 Lisp_Object overlay
, start
, end
, old_overlay
;
424 XSETMISC (old_overlay
, list
);
425 charpos
= marker_position (OVERLAY_START (old_overlay
));
426 start
= Fmake_marker ();
427 Fset_marker (start
, make_number (charpos
), buffer
);
428 XMARKER (start
)->insertion_type
429 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
431 charpos
= marker_position (OVERLAY_END (old_overlay
));
432 end
= Fmake_marker ();
433 Fset_marker (end
, make_number (charpos
), buffer
);
434 XMARKER (end
)->insertion_type
435 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
437 overlay
= allocate_misc ();
438 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
439 OVERLAY_START (overlay
) = start
;
440 OVERLAY_END (overlay
) = end
;
441 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
442 XOVERLAY (overlay
)->next
= NULL
;
445 tail
= tail
->next
= XOVERLAY (overlay
);
447 result
= tail
= XOVERLAY (overlay
);
454 /* Clone per-buffer values of buffer FROM.
456 Buffer TO gets the same per-buffer values as FROM, with the
457 following exceptions: (1) TO's name is left untouched, (2) markers
458 are copied and made to refer to TO, and (3) overlay lists are
462 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
464 Lisp_Object to_buffer
;
467 XSETBUFFER (to_buffer
, to
);
469 /* buffer-local Lisp variables start at `undo_list',
470 tho only the ones from `name' on are GC'd normally. */
471 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
472 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
473 offset
+= sizeof (Lisp_Object
))
477 /* Don't touch the `name' which should be unique for every buffer. */
478 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
481 obj
= PER_BUFFER_VALUE (from
, offset
);
482 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
484 struct Lisp_Marker
*m
= XMARKER (obj
);
485 obj
= Fmake_marker ();
486 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
487 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
490 PER_BUFFER_VALUE (to
, offset
) = obj
;
493 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
495 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
496 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
498 /* Get (a copy of) the alist of Lisp-level local variables of FROM
499 and install that in TO. */
500 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
504 /* If buffer B has markers to record PT, BEGV and ZV when it is not
505 current, update these markers. */
508 record_buffer_markers (struct buffer
*b
)
510 if (! NILP (BVAR (b
, pt_marker
)))
514 eassert (!NILP (BVAR (b
, begv_marker
)));
515 eassert (!NILP (BVAR (b
, zv_marker
)));
517 XSETBUFFER (buffer
, b
);
518 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
519 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
520 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
525 /* If buffer B has markers to record PT, BEGV and ZV when it is not
526 current, fetch these values into B->begv etc. */
529 fetch_buffer_markers (struct buffer
*b
)
531 if (! NILP (BVAR (b
, pt_marker
)))
535 eassert (!NILP (BVAR (b
, begv_marker
)));
536 eassert (!NILP (BVAR (b
, zv_marker
)));
538 m
= BVAR (b
, pt_marker
);
539 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
541 m
= BVAR (b
, begv_marker
);
542 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
544 m
= BVAR (b
, zv_marker
);
545 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
550 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
552 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
553 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
554 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
555 NAME should be a string which is not the name of an existing buffer.
556 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
557 such as major and minor modes, in the indirect buffer.
558 CLONE nil means the indirect buffer's state is reset to default values. */)
559 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
561 Lisp_Object buf
, tem
;
565 buf
= Fget_buffer (name
);
567 error ("Buffer name `%s' is in use", SDATA (name
));
570 base_buffer
= Fget_buffer (base_buffer
);
571 if (NILP (base_buffer
))
572 error ("No such buffer: `%s'", SDATA (tem
));
573 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
574 error ("Base buffer has been killed");
576 if (SCHARS (name
) == 0)
577 error ("Empty string for buffer name is not allowed");
579 b
= allocate_buffer ();
581 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
582 ? XBUFFER (base_buffer
)->base_buffer
583 : XBUFFER (base_buffer
));
585 /* Use the base buffer's text object. */
586 b
->text
= b
->base_buffer
->text
;
588 b
->pt
= b
->base_buffer
->pt
;
589 b
->begv
= b
->base_buffer
->begv
;
590 b
->zv
= b
->base_buffer
->zv
;
591 b
->pt_byte
= b
->base_buffer
->pt_byte
;
592 b
->begv_byte
= b
->base_buffer
->begv_byte
;
593 b
->zv_byte
= b
->base_buffer
->zv_byte
;
595 b
->newline_cache
= 0;
596 b
->width_run_cache
= 0;
597 BVAR (b
, width_table
) = Qnil
;
599 /* Put this on the chain of all buffers including killed ones. */
600 b
->header
.next
.buffer
= all_buffers
;
603 name
= Fcopy_sequence (name
);
604 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
605 BVAR (b
, name
) = name
;
608 reset_buffer_local_variables (b
, 1);
610 /* Put this in the alist of all live buffers. */
612 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
614 BVAR (b
, mark
) = Fmake_marker ();
615 BVAR (b
, name
) = name
;
617 /* The multibyte status belongs to the base buffer. */
618 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
620 /* Make sure the base buffer has markers for its narrowing. */
621 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
623 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
624 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
626 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
627 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
629 b
->base_buffer
->pt_byte
);
631 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
632 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
633 b
->base_buffer
->begv
,
634 b
->base_buffer
->begv_byte
);
636 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
637 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
639 b
->base_buffer
->zv_byte
);
640 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
645 /* Give the indirect buffer markers for its narrowing. */
646 BVAR (b
, pt_marker
) = Fmake_marker ();
647 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
648 BVAR (b
, begv_marker
) = Fmake_marker ();
649 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
650 BVAR (b
, zv_marker
) = Fmake_marker ();
651 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
652 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
656 struct buffer
*old_b
= current_buffer
;
658 clone_per_buffer_values (b
->base_buffer
, b
);
659 BVAR (b
, filename
) = Qnil
;
660 BVAR (b
, file_truename
) = Qnil
;
661 BVAR (b
, display_count
) = make_number (0);
662 BVAR (b
, backed_up
) = Qnil
;
663 BVAR (b
, auto_save_file_name
) = Qnil
;
664 set_buffer_internal_1 (b
);
665 Fset (intern ("buffer-save-without-query"), Qnil
);
666 Fset (intern ("buffer-file-number"), Qnil
);
667 Fset (intern ("buffer-stale-function"), Qnil
);
668 set_buffer_internal_1 (old_b
);
671 /* Run buffer-list-update-hook. */
672 if (!NILP (Vrun_hooks
))
673 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
679 delete_all_overlays (struct buffer
*b
)
683 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
684 have to empty the list, otherwise we end up with overlays that
685 think they belong to this buffer while the buffer doesn't know about
687 while (b
->overlays_before
)
689 XSETMISC (overlay
, b
->overlays_before
);
690 Fdelete_overlay (overlay
);
692 while (b
->overlays_after
)
694 XSETMISC (overlay
, b
->overlays_after
);
695 Fdelete_overlay (overlay
);
697 eassert (b
->overlays_before
== NULL
);
698 eassert (b
->overlays_after
== NULL
);
701 /* Reinitialize everything about a buffer except its name and contents
703 If called on an already-initialized buffer, the list of overlays
704 should be deleted before calling this function, otherwise we end up
705 with overlays that claim to belong to the buffer but the buffer
706 claims it doesn't belong to it. */
709 reset_buffer (register struct buffer
*b
)
711 BVAR (b
, filename
) = Qnil
;
712 BVAR (b
, file_truename
) = Qnil
;
713 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
715 b
->modtime_size
= -1;
716 XSETFASTINT (BVAR (b
, save_length
), 0);
717 b
->last_window_start
= 1;
718 /* It is more conservative to start out "changed" than "unchanged". */
720 b
->prevent_redisplay_optimizations_p
= 1;
721 BVAR (b
, backed_up
) = Qnil
;
722 BUF_AUTOSAVE_MODIFF (b
) = 0;
723 b
->auto_save_failure_time
= 0;
724 BVAR (b
, auto_save_file_name
) = Qnil
;
725 BVAR (b
, read_only
) = Qnil
;
726 b
->overlays_before
= NULL
;
727 b
->overlays_after
= NULL
;
728 b
->overlay_center
= BEG
;
729 BVAR (b
, mark_active
) = Qnil
;
730 BVAR (b
, point_before_scroll
) = Qnil
;
731 BVAR (b
, file_format
) = Qnil
;
732 BVAR (b
, auto_save_file_format
) = Qt
;
733 BVAR (b
, last_selected_window
) = Qnil
;
734 XSETINT (BVAR (b
, display_count
), 0);
735 BVAR (b
, display_time
) = Qnil
;
736 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
737 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
738 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
740 b
->display_error_modiff
= 0;
743 /* Reset buffer B's local variables info.
744 Don't use this on a buffer that has already been in use;
745 it does not treat permanent locals consistently.
746 Instead, use Fkill_all_local_variables.
748 If PERMANENT_TOO is 1, then we reset permanent
749 buffer-local variables. If PERMANENT_TOO is 0,
750 we preserve those. */
753 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
758 /* Reset the major mode to Fundamental, together with all the
759 things that depend on the major mode.
760 default-major-mode is handled at a higher level.
761 We ignore it here. */
762 BVAR (b
, major_mode
) = Qfundamental_mode
;
763 BVAR (b
, keymap
) = Qnil
;
764 BVAR (b
, mode_name
) = QSFundamental
;
765 BVAR (b
, minor_modes
) = Qnil
;
767 /* If the standard case table has been altered and invalidated,
768 fix up its insides first. */
769 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
770 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
771 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
772 Fset_standard_case_table (Vascii_downcase_table
);
774 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
775 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
776 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
777 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
778 BVAR (b
, invisibility_spec
) = Qt
;
780 /* Reset all (or most) per-buffer variables to their defaults. */
782 BVAR (b
, local_var_alist
) = Qnil
;
785 Lisp_Object tmp
, prop
, last
= Qnil
;
786 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
787 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
789 /* If permanent-local, keep it. */
791 if (EQ (prop
, Qpermanent_local_hook
))
793 /* This is a partially permanent hook variable.
794 Preserve only the elements that want to be preserved. */
795 Lisp_Object list
, newlist
;
796 list
= XCDR (XCAR (tmp
));
800 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
802 Lisp_Object elt
= XCAR (list
);
803 /* Preserve element ELT if it's t,
804 if it is a function with a `permanent-local-hook' property,
805 or if it's not a symbol. */
808 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
809 newlist
= Fcons (elt
, newlist
);
811 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
814 /* Delete this local variable. */
815 else if (NILP (last
))
816 BVAR (b
, local_var_alist
) = XCDR (tmp
);
818 XSETCDR (last
, XCDR (tmp
));
821 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
822 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
823 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
825 /* For each slot that has a default value,
826 copy that into the slot. */
828 /* buffer-local Lisp variables start at `undo_list',
829 tho only the ones from `name' on are GC'd normally. */
830 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
831 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
832 offset
+= sizeof (Lisp_Object
))
834 int idx
= PER_BUFFER_IDX (offset
);
837 || buffer_permanent_local_flags
[idx
] == 0)))
838 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
842 /* We split this away from generate-new-buffer, because rename-buffer
843 and set-visited-file-name ought to be able to use this to really
844 rename the buffer properly. */
846 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
847 Sgenerate_new_buffer_name
, 1, 2, 0,
848 doc
: /* Return a string that is the name of no existing buffer based on NAME.
849 If there is no live buffer named NAME, then return NAME.
850 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
851 \(starting at 2) until an unused name is found, and then return that name.
852 Optional second argument IGNORE specifies a name that is okay to use (if
853 it is in the sequence to be tried) even if a buffer with that name exists. */)
854 (register Lisp_Object name
, Lisp_Object ignore
)
856 register Lisp_Object gentemp
, tem
;
858 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
862 tem
= Fstring_equal (name
, ignore
);
865 tem
= Fget_buffer (name
);
872 sprintf (number
, "<%"pD
"d>", ++count
);
873 gentemp
= concat2 (name
, build_string (number
));
874 tem
= Fstring_equal (gentemp
, ignore
);
877 tem
= Fget_buffer (gentemp
);
884 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
885 doc
: /* Return the name of BUFFER, as a string.
886 BUFFER defaults to the current buffer.
887 Return nil if BUFFER has been killed. */)
888 (register Lisp_Object buffer
)
891 return BVAR (current_buffer
, name
);
892 CHECK_BUFFER (buffer
);
893 return BVAR (XBUFFER (buffer
), name
);
896 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
897 doc
: /* Return name of file BUFFER is visiting, or nil if none.
898 No argument or nil as argument means use the current buffer. */)
899 (register Lisp_Object buffer
)
902 return BVAR (current_buffer
, filename
);
903 CHECK_BUFFER (buffer
);
904 return BVAR (XBUFFER (buffer
), filename
);
907 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
909 doc
: /* Return the base buffer of indirect buffer BUFFER.
910 If BUFFER is not indirect, return nil.
911 BUFFER defaults to the current buffer. */)
912 (register Lisp_Object buffer
)
915 Lisp_Object base_buffer
;
918 base
= current_buffer
->base_buffer
;
921 CHECK_BUFFER (buffer
);
922 base
= XBUFFER (buffer
)->base_buffer
;
927 XSETBUFFER (base_buffer
, base
);
931 DEFUN ("buffer-local-value", Fbuffer_local_value
,
932 Sbuffer_local_value
, 2, 2, 0,
933 doc
: /* Return the value of VARIABLE in BUFFER.
934 If VARIABLE does not have a buffer-local binding in BUFFER, the value
935 is the default binding of the variable. */)
936 (register Lisp_Object variable
, register Lisp_Object buffer
)
938 register struct buffer
*buf
;
939 register Lisp_Object result
;
940 struct Lisp_Symbol
*sym
;
942 CHECK_SYMBOL (variable
);
943 CHECK_BUFFER (buffer
);
944 buf
= XBUFFER (buffer
);
945 sym
= XSYMBOL (variable
);
948 switch (sym
->redirect
)
950 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
951 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
952 case SYMBOL_LOCALIZED
:
953 { /* Look in local_var_alist. */
954 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
955 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
956 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
960 { /* What binding is loaded right now? */
961 Lisp_Object current_alist_element
= blv
->valcell
;
963 /* The value of the currently loaded binding is not
964 stored in it, but rather in the realvalue slot.
965 Store that value into the binding it belongs to
966 in case that is the one we are about to use. */
968 XSETCDR (current_alist_element
,
969 do_symval_forwarding (blv
->fwd
));
971 /* Now get the (perhaps updated) value out of the binding. */
972 result
= XCDR (result
);
975 result
= Fdefault_value (variable
);
978 case SYMBOL_FORWARDED
:
980 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
981 if (BUFFER_OBJFWDP (fwd
))
982 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
984 result
= Fdefault_value (variable
);
990 if (!EQ (result
, Qunbound
))
993 xsignal1 (Qvoid_variable
, variable
);
996 /* Return an alist of the Lisp-level buffer-local bindings of
997 buffer BUF. That is, don't include the variables maintained
998 in special slots in the buffer object. */
1001 buffer_lisp_local_variables (struct buffer
*buf
)
1003 Lisp_Object result
= Qnil
;
1004 register Lisp_Object tail
;
1005 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1007 Lisp_Object val
, elt
;
1011 /* Reference each variable in the alist in buf.
1012 If inquiring about the current buffer, this gets the current values,
1013 so store them into the alist so the alist is up to date.
1014 If inquiring about some other buffer, this swaps out any values
1015 for that buffer, making the alist up to date automatically. */
1016 val
= find_symbol_value (XCAR (elt
));
1017 /* Use the current buffer value only if buf is the current buffer. */
1018 if (buf
!= current_buffer
)
1021 result
= Fcons (EQ (val
, Qunbound
)
1023 : Fcons (XCAR (elt
), val
),
1030 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1031 Sbuffer_local_variables
, 0, 1, 0,
1032 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1033 Most elements look like (SYMBOL . VALUE), describing one variable.
1034 For a symbol that is locally unbound, just the symbol appears in the value.
1035 Note that storing new VALUEs in these elements doesn't change the variables.
1036 No argument or nil as argument means use current buffer as BUFFER. */)
1037 (register Lisp_Object buffer
)
1039 register struct buffer
*buf
;
1040 register Lisp_Object result
;
1043 buf
= current_buffer
;
1046 CHECK_BUFFER (buffer
);
1047 buf
= XBUFFER (buffer
);
1050 result
= buffer_lisp_local_variables (buf
);
1052 /* Add on all the variables stored in special slots. */
1056 /* buffer-local Lisp variables start at `undo_list',
1057 tho only the ones from `name' on are GC'd normally. */
1058 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
1059 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
1060 /* sizeof EMACS_INT == sizeof Lisp_Object */
1061 offset
+= (sizeof (EMACS_INT
)))
1063 idx
= PER_BUFFER_IDX (offset
);
1064 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1065 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1067 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1068 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1069 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1078 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1080 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1081 No argument or nil as argument means use current buffer as BUFFER. */)
1082 (register Lisp_Object buffer
)
1084 register struct buffer
*buf
;
1086 buf
= current_buffer
;
1089 CHECK_BUFFER (buffer
);
1090 buf
= XBUFFER (buffer
);
1093 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1096 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1098 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1099 A non-nil FLAG means mark the buffer modified. */)
1100 (register Lisp_Object flag
)
1102 register int already
;
1103 register Lisp_Object fn
;
1104 Lisp_Object buffer
, window
;
1106 #ifdef CLASH_DETECTION
1107 /* If buffer becoming modified, lock the file.
1108 If buffer becoming unmodified, unlock the file. */
1110 fn
= BVAR (current_buffer
, file_truename
);
1111 /* Test buffer-file-name so that binding it to nil is effective. */
1112 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1114 already
= SAVE_MODIFF
< MODIFF
;
1115 if (!already
&& !NILP (flag
))
1117 else if (already
&& NILP (flag
))
1120 #endif /* CLASH_DETECTION */
1122 /* Here we have a problem. SAVE_MODIFF is used here to encode
1123 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1124 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1125 modify SAVE_MODIFF to affect one, we may affect the other
1127 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1128 if SAVE_MODIFF<auto_save_modified that means we risk changing
1129 recent-auto-save-p from t to nil.
1130 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1131 we risk changing recent-auto-save-p from nil to t. */
1132 SAVE_MODIFF
= (NILP (flag
)
1133 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1135 /* Let's try to preserve recent-auto-save-p. */
1136 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1137 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1138 we can either decrease SAVE_MODIFF and auto_save_modified
1139 or increase MODIFF. */
1142 /* Set update_mode_lines only if buffer is displayed in some window.
1143 Packages like jit-lock or lazy-lock preserve a buffer's modified
1144 state by recording/restoring the state around blocks of code.
1145 Setting update_mode_lines makes redisplay consider all windows
1146 (on all frames). Stealth fontification of buffers not displayed
1147 would incur additional redisplay costs if we'd set
1148 update_modes_lines unconditionally.
1150 Ideally, I think there should be another mechanism for fontifying
1151 buffers without "modifying" buffers, or redisplay should be
1152 smarter about updating the `*' in mode lines. --gerd */
1153 XSETBUFFER (buffer
, current_buffer
);
1154 window
= Fget_buffer_window (buffer
, Qt
);
1155 if (WINDOWP (window
))
1157 ++update_mode_lines
;
1158 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1164 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1165 Srestore_buffer_modified_p
, 1, 1, 0,
1166 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1167 It is not ensured that mode lines will be updated to show the modified
1168 state of the current buffer. Use with care. */)
1171 #ifdef CLASH_DETECTION
1174 /* If buffer becoming modified, lock the file.
1175 If buffer becoming unmodified, unlock the file. */
1177 fn
= BVAR (current_buffer
, file_truename
);
1178 /* Test buffer-file-name so that binding it to nil is effective. */
1179 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1181 int already
= SAVE_MODIFF
< MODIFF
;
1182 if (!already
&& !NILP (flag
))
1184 else if (already
&& NILP (flag
))
1187 #endif /* CLASH_DETECTION */
1189 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1193 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1195 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1196 Each buffer has a tick counter which is incremented each time the
1197 text in that buffer is changed. It wraps around occasionally.
1198 No argument or nil as argument means use current buffer as BUFFER. */)
1199 (register Lisp_Object buffer
)
1201 register struct buffer
*buf
;
1203 buf
= current_buffer
;
1206 CHECK_BUFFER (buffer
);
1207 buf
= XBUFFER (buffer
);
1210 return make_number (BUF_MODIFF (buf
));
1213 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1214 Sbuffer_chars_modified_tick
, 0, 1, 0,
1215 doc
: /* Return BUFFER's character-change tick counter.
1216 Each buffer has a character-change tick counter, which is set to the
1217 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1218 time text in that buffer is inserted or deleted. By comparing the
1219 values returned by two individual calls of `buffer-chars-modified-tick',
1220 you can tell whether a character change occurred in that buffer in
1221 between these calls. No argument or nil as argument means use current
1222 buffer as BUFFER. */)
1223 (register Lisp_Object buffer
)
1225 register struct buffer
*buf
;
1227 buf
= current_buffer
;
1230 CHECK_BUFFER (buffer
);
1231 buf
= XBUFFER (buffer
);
1234 return make_number (BUF_CHARS_MODIFF (buf
));
1237 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1238 "(list (read-string \"Rename buffer (to new name): \" \
1239 nil 'buffer-name-history (buffer-name (current-buffer))) \
1240 current-prefix-arg)",
1241 doc
: /* Change current buffer's name to NEWNAME (a string).
1242 If second arg UNIQUE is nil or omitted, it is an error if a
1243 buffer named NEWNAME already exists.
1244 If UNIQUE is non-nil, come up with a new name using
1245 `generate-new-buffer-name'.
1246 Interactively, you can set UNIQUE with a prefix argument.
1247 We return the name we actually gave the buffer.
1248 This does not change the name of the visited file (if any). */)
1249 (register Lisp_Object newname
, Lisp_Object unique
)
1251 register Lisp_Object tem
, buf
;
1253 CHECK_STRING (newname
);
1255 if (SCHARS (newname
) == 0)
1256 error ("Empty string is invalid as a buffer name");
1258 tem
= Fget_buffer (newname
);
1261 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1262 rename the buffer automatically so you can create another
1263 with the original name. It makes UNIQUE equivalent to
1264 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1265 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1266 return BVAR (current_buffer
, name
);
1268 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1270 error ("Buffer name `%s' is in use", SDATA (newname
));
1273 BVAR (current_buffer
, name
) = newname
;
1275 /* Catch redisplay's attention. Unless we do this, the mode lines for
1276 any windows displaying current_buffer will stay unchanged. */
1277 update_mode_lines
++;
1279 XSETBUFFER (buf
, current_buffer
);
1280 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1281 if (NILP (BVAR (current_buffer
, filename
))
1282 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1283 call0 (intern ("rename-auto-save-file"));
1285 /* Run buffer-list-update-hook. */
1286 if (!NILP (Vrun_hooks
))
1287 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1289 /* Refetch since that last call may have done GC. */
1290 return BVAR (current_buffer
, name
);
1293 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1294 doc
: /* Return most recently selected buffer other than BUFFER.
1295 Buffers not visible in windows are preferred to visible buffers, unless
1296 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1297 BUFFER unless it denotes a live buffer. If the optional third argument
1298 FRAME is non-nil, use that frame's buffer list instead of the selected
1299 frame's buffer list.
1301 The buffer is found by scanning the selected or specified frame's buffer
1302 list first, followed by the list of all buffers. If no other buffer
1303 exists, return the buffer `*scratch*' (creating it if necessary). */)
1304 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1306 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1307 Lisp_Object tail
, buf
, pred
;
1308 Lisp_Object notsogood
= Qnil
;
1311 frame
= selected_frame
;
1313 CHECK_FRAME (frame
);
1315 pred
= frame_buffer_predicate (frame
);
1316 /* Consider buffers that have been seen in the frame first. */
1317 tail
= XFRAME (frame
)->buffer_list
;
1318 for (; CONSP (tail
); tail
= XCDR (tail
))
1321 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1322 && !NILP (BVAR (XBUFFER (buf
), name
))
1323 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1324 /* If the frame has a buffer_predicate, disregard buffers that
1325 don't fit the predicate. */
1326 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1328 if (!NILP (visible_ok
)
1329 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1331 else if (NILP (notsogood
))
1336 /* Consider alist of all buffers next. */
1337 tail
= Vbuffer_alist
;
1338 for (; CONSP (tail
); tail
= XCDR (tail
))
1340 buf
= Fcdr (XCAR (tail
));
1341 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1342 && !NILP (BVAR (XBUFFER (buf
), name
))
1343 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1344 /* If the frame has a buffer_predicate, disregard buffers that
1345 don't fit the predicate. */
1346 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1348 if (!NILP (visible_ok
)
1349 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1351 else if (NILP (notsogood
))
1356 if (!NILP (notsogood
))
1360 buf
= Fget_buffer (build_string ("*scratch*"));
1363 buf
= Fget_buffer_create (build_string ("*scratch*"));
1364 Fset_buffer_major_mode (buf
);
1370 /* The following function is a safe variant of Fother_buffer: It doesn't
1371 pay attention to any frame-local buffer lists, doesn't care about
1372 visibility of buffers, and doesn't evaluate any frame predicates. */
1375 other_buffer_safely (Lisp_Object buffer
)
1377 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1378 Lisp_Object tail
, buf
;
1380 tail
= Vbuffer_alist
;
1381 for (; CONSP (tail
); tail
= XCDR (tail
))
1383 buf
= Fcdr (XCAR (tail
));
1384 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1385 && !NILP (BVAR (XBUFFER (buf
), name
))
1386 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1390 buf
= Fget_buffer (build_string ("*scratch*"));
1393 buf
= Fget_buffer_create (build_string ("*scratch*"));
1394 Fset_buffer_major_mode (buf
);
1400 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1402 doc
: /* Start keeping undo information for buffer BUFFER.
1403 No argument or nil as argument means do this for the current buffer. */)
1404 (register Lisp_Object buffer
)
1406 Lisp_Object real_buffer
;
1409 XSETBUFFER (real_buffer
, current_buffer
);
1412 real_buffer
= Fget_buffer (buffer
);
1413 if (NILP (real_buffer
))
1417 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1418 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1424 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1425 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1426 The buffer being killed will be current while the hook is running.\n\
1429 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1430 doc
: /* Kill buffer BUFFER-OR-NAME.
1431 The argument may be a buffer or the name of an existing buffer.
1432 Argument nil or omitted means kill the current buffer. Return t if the
1433 buffer is actually killed, nil otherwise.
1435 This function calls `replace-buffer-in-windows' for cleaning up all
1436 windows currently displaying the buffer to be killed. The functions in
1437 `kill-buffer-query-functions' are called with the buffer to be killed as
1438 the current buffer. If any of them returns nil, the buffer is not
1439 killed. The hook `kill-buffer-hook' is run before the buffer is
1440 actually killed. The buffer being killed will be current while the hook
1443 Any processes that have this buffer as the `process-buffer' are killed
1445 (Lisp_Object buffer_or_name
)
1448 register struct buffer
*b
;
1449 register Lisp_Object tem
;
1450 register struct Lisp_Marker
*m
;
1451 struct gcpro gcpro1
;
1453 if (NILP (buffer_or_name
))
1454 buffer
= Fcurrent_buffer ();
1456 buffer
= Fget_buffer (buffer_or_name
);
1458 nsberror (buffer_or_name
);
1460 b
= XBUFFER (buffer
);
1462 /* Avoid trouble for buffer already dead. */
1463 if (NILP (BVAR (b
, name
)))
1466 /* Query if the buffer is still modified. */
1467 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1468 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1471 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1472 BVAR (b
, name
), make_number (0)));
1478 /* Run hooks with the buffer to be killed the current buffer. */
1480 ptrdiff_t count
= SPECPDL_INDEX ();
1481 Lisp_Object arglist
[1];
1483 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1484 set_buffer_internal (b
);
1486 /* First run the query functions; if any query is answered no,
1487 don't kill the buffer. */
1488 arglist
[0] = Qkill_buffer_query_functions
;
1489 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1491 return unbind_to (count
, Qnil
);
1493 /* Then run the hooks. */
1494 Frun_hooks (1, &Qkill_buffer_hook
);
1495 unbind_to (count
, Qnil
);
1498 /* We have no more questions to ask. Verify that it is valid
1499 to kill the buffer. This must be done after the questions
1500 since anything can happen within do_yes_or_no_p. */
1502 /* Don't kill the minibuffer now current. */
1503 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1506 if (NILP (BVAR (b
, name
)))
1509 /* When we kill a base buffer, kill all its indirect buffers.
1510 We do it at this stage so nothing terrible happens if they
1511 ask questions or their hooks get errors. */
1512 if (! b
->base_buffer
)
1514 struct buffer
*other
;
1518 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1519 /* all_buffers contains dead buffers too;
1520 don't re-kill them. */
1521 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1524 XSETBUFFER (buf
, other
);
1531 /* Run replace_buffer_in_windows before making another buffer current
1532 since set-window-buffer-start-and-point will refuse to make another
1533 buffer current if the selected window does not show the current
1534 buffer. (Bug#10114) */
1535 replace_buffer_in_windows (buffer
);
1537 /* Make this buffer not be current.
1538 In the process, notice if this is the sole visible buffer
1539 and give up if so. */
1540 if (b
== current_buffer
)
1542 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1544 if (b
== current_buffer
)
1548 /* Notice if the buffer to kill is the sole visible buffer
1549 when we're currently in the mini-buffer, and give up if so. */
1550 XSETBUFFER (tem
, current_buffer
);
1551 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1553 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1554 if (EQ (buffer
, tem
))
1558 /* Now there is no question: we can kill the buffer. */
1560 #ifdef CLASH_DETECTION
1561 /* Unlock this buffer's file, if it is locked. */
1563 #endif /* CLASH_DETECTION */
1566 kill_buffer_processes (buffer
);
1569 /* Killing buffer processes may run sentinels which may
1570 have called kill-buffer. */
1572 if (NILP (BVAR (b
, name
)))
1575 /* These may run Lisp code and into infinite loops (if someone
1576 insisted on circular lists) so allow quitting here. */
1577 frames_discard_buffer (buffer
);
1579 clear_charpos_cache (b
);
1581 tem
= Vinhibit_quit
;
1583 /* Remove the buffer from the list of all buffers. */
1584 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1585 /* If replace_buffer_in_windows didn't do its job correctly fix that
1587 replace_buffer_in_windows_safely (buffer
);
1588 Vinhibit_quit
= tem
;
1590 /* Delete any auto-save file, if we saved it in this session.
1591 But not if the buffer is modified. */
1592 if (STRINGP (BVAR (b
, auto_save_file_name
))
1593 && BUF_AUTOSAVE_MODIFF (b
) != 0
1594 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1595 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1596 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1599 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1600 if (! NILP (delete))
1601 internal_delete_file (BVAR (b
, auto_save_file_name
));
1606 /* Unchain all markers that belong to this indirect buffer.
1607 Don't unchain the markers that belong to the base buffer
1608 or its other indirect buffers. */
1609 for (m
= BUF_MARKERS (b
); m
; )
1611 struct Lisp_Marker
*next
= m
->next
;
1619 /* Unchain all markers of this buffer and its indirect buffers.
1620 and leave them pointing nowhere. */
1621 for (m
= BUF_MARKERS (b
); m
; )
1623 struct Lisp_Marker
*next
= m
->next
;
1628 BUF_MARKERS (b
) = NULL
;
1629 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1631 /* Perhaps we should explicitly free the interval tree here... */
1634 /* Reset the local variables, so that this buffer's local values
1635 won't be protected from GC. They would be protected
1636 if they happened to remain cached in their symbols.
1637 This gets rid of them for certain. */
1638 swap_out_buffer_local_variables (b
);
1639 reset_buffer_local_variables (b
, 1);
1641 BVAR (b
, name
) = Qnil
;
1644 if (! b
->base_buffer
)
1645 free_buffer_text (b
);
1647 if (b
->newline_cache
)
1649 free_region_cache (b
->newline_cache
);
1650 b
->newline_cache
= 0;
1652 if (b
->width_run_cache
)
1654 free_region_cache (b
->width_run_cache
);
1655 b
->width_run_cache
= 0;
1657 BVAR (b
, width_table
) = Qnil
;
1659 BVAR (b
, undo_list
) = Qnil
;
1661 /* Run buffer-list-update-hook. */
1662 if (!NILP (Vrun_hooks
))
1663 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1668 /* Move association for BUFFER to the front of buffer (a)lists. Since
1669 we do this each time BUFFER is selected visibly, the more recently
1670 selected buffers are always closer to the front of those lists. This
1671 means that other_buffer is more likely to choose a relevant buffer.
1673 Note that this moves BUFFER to the front of the buffer lists of the
1674 selected frame even if BUFFER is not shown there. If BUFFER is not
1675 shown in the selected frame, consider the present behavior a feature.
1676 `select-window' gets this right since it shows BUFFER in the selected
1677 window when calling us. */
1680 record_buffer (Lisp_Object buffer
)
1682 Lisp_Object aelt
, aelt_cons
, tem
;
1683 register struct frame
*f
= XFRAME (selected_frame
);
1685 CHECK_BUFFER (buffer
);
1687 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1688 Don't allow quitting since this might leave the buffer list in an
1689 inconsistent state. */
1690 tem
= Vinhibit_quit
;
1692 aelt
= Frassq (buffer
, Vbuffer_alist
);
1693 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1694 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1695 XSETCDR (aelt_cons
, Vbuffer_alist
);
1696 Vbuffer_alist
= aelt_cons
;
1697 Vinhibit_quit
= tem
;
1699 /* Update buffer list of selected frame. */
1700 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1701 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1703 /* Run buffer-list-update-hook. */
1704 if (!NILP (Vrun_hooks
))
1705 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1709 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1710 buffer is killed. For the selected frame's buffer list this moves
1711 BUFFER to its end even if it was never shown in that frame. If
1712 this happens we have a feature, hence `bury-buffer-internal' should be
1713 called only when BUFFER was shown in the selected frame. */
1715 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1717 doc
: /* Move BUFFER to the end of the buffer list. */)
1718 (Lisp_Object buffer
)
1720 Lisp_Object aelt
, aelt_cons
, tem
;
1721 register struct frame
*f
= XFRAME (selected_frame
);
1723 CHECK_BUFFER (buffer
);
1725 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1726 Don't allow quitting since this might leave the buffer list in an
1727 inconsistent state. */
1728 tem
= Vinhibit_quit
;
1730 aelt
= Frassq (buffer
, Vbuffer_alist
);
1731 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1732 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1733 XSETCDR (aelt_cons
, Qnil
);
1734 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1735 Vinhibit_quit
= tem
;
1737 /* Update buffer lists of selected frame. */
1738 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1739 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1741 /* Run buffer-list-update-hook. */
1742 if (!NILP (Vrun_hooks
))
1743 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1748 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1749 doc
: /* Set an appropriate major mode for BUFFER.
1750 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1751 according to `default-major-mode'.
1752 Use this function before selecting the buffer, since it may need to inspect
1753 the current buffer's major mode. */)
1754 (Lisp_Object buffer
)
1757 Lisp_Object function
;
1759 CHECK_BUFFER (buffer
);
1761 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1762 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1763 function
= find_symbol_value (intern ("initial-major-mode"));
1766 function
= BVAR (&buffer_defaults
, major_mode
);
1768 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1769 function
= BVAR (current_buffer
, major_mode
);
1772 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1775 count
= SPECPDL_INDEX ();
1777 /* To select a nonfundamental mode,
1778 select the buffer temporarily and then call the mode function. */
1780 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1782 Fset_buffer (buffer
);
1785 return unbind_to (count
, Qnil
);
1788 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1789 doc
: /* Return the current buffer as a Lisp object. */)
1792 register Lisp_Object buf
;
1793 XSETBUFFER (buf
, current_buffer
);
1797 /* Set the current buffer to B.
1799 We previously set windows_or_buffers_changed here to invalidate
1800 global unchanged information in beg_unchanged and end_unchanged.
1801 This is no longer necessary because we now compute unchanged
1802 information on a buffer-basis. Every action affecting other
1803 windows than the selected one requires a select_window at some
1804 time, and that increments windows_or_buffers_changed. */
1807 set_buffer_internal (register struct buffer
*b
)
1809 if (current_buffer
!= b
)
1810 set_buffer_internal_1 (b
);
1813 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1814 This is used by redisplay. */
1817 set_buffer_internal_1 (register struct buffer
*b
)
1819 register struct buffer
*old_buf
;
1820 register Lisp_Object tail
;
1822 #ifdef USE_MMAP_FOR_BUFFERS
1823 if (b
->text
->beg
== NULL
)
1824 enlarge_buffer_text (b
, 0);
1825 #endif /* USE_MMAP_FOR_BUFFERS */
1827 if (current_buffer
== b
)
1830 old_buf
= current_buffer
;
1832 last_known_column_point
= -1; /* invalidate indentation cache */
1836 /* Put the undo list back in the base buffer, so that it appears
1837 that an indirect buffer shares the undo list of its base. */
1838 if (old_buf
->base_buffer
)
1839 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1841 /* If the old current buffer has markers to record PT, BEGV and ZV
1842 when it is not current, update them now. */
1843 record_buffer_markers (old_buf
);
1846 /* Get the undo list from the base buffer, so that it appears
1847 that an indirect buffer shares the undo list of its base. */
1849 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1851 /* If the new current buffer has markers to record PT, BEGV and ZV
1852 when it is not current, fetch them now. */
1853 fetch_buffer_markers (b
);
1855 /* Look down buffer's list of local Lisp variables
1856 to find and update any that forward into C variables. */
1860 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1862 Lisp_Object var
= XCAR (XCAR (tail
));
1863 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1864 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1865 && SYMBOL_BLV (sym
)->fwd
)
1866 /* Just reference the variable
1867 to cause it to become set for this buffer. */
1868 Fsymbol_value (var
);
1871 /* Do the same with any others that were local to the previous buffer */
1872 while (b
!= old_buf
&& (b
= old_buf
, b
));
1875 /* Switch to buffer B temporarily for redisplay purposes.
1876 This avoids certain things that don't need to be done within redisplay. */
1879 set_buffer_temp (struct buffer
*b
)
1881 register struct buffer
*old_buf
;
1883 if (current_buffer
== b
)
1886 old_buf
= current_buffer
;
1889 /* If the old current buffer has markers to record PT, BEGV and ZV
1890 when it is not current, update them now. */
1891 record_buffer_markers (old_buf
);
1893 /* If the new current buffer has markers to record PT, BEGV and ZV
1894 when it is not current, fetch them now. */
1895 fetch_buffer_markers (b
);
1898 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1899 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1900 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1901 also `save-excursion' when you want to make a buffer current
1902 temporarily. This function does not display the buffer, so its effect
1903 ends when the current command terminates. Use `switch-to-buffer' or
1904 `pop-to-buffer' to switch buffers permanently. */)
1905 (register Lisp_Object buffer_or_name
)
1907 register Lisp_Object buffer
;
1908 buffer
= Fget_buffer (buffer_or_name
);
1910 nsberror (buffer_or_name
);
1911 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1912 error ("Selecting deleted buffer");
1913 set_buffer_internal (XBUFFER (buffer
));
1917 /* Set the current buffer to BUFFER provided it is alive. */
1920 set_buffer_if_live (Lisp_Object buffer
)
1922 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1923 Fset_buffer (buffer
);
1927 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1928 Sbarf_if_buffer_read_only
, 0, 0, 0,
1929 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1932 if (!NILP (BVAR (current_buffer
, read_only
))
1933 && NILP (Vinhibit_read_only
))
1934 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1938 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1939 doc
: /* Delete the entire contents of the current buffer.
1940 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1941 so the buffer is truly empty after this. */)
1948 current_buffer
->last_window_start
= 1;
1949 /* Prevent warnings, or suspension of auto saving, that would happen
1950 if future size is less than past size. Use of erase-buffer
1951 implies that the future text is not really related to the past text. */
1952 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1957 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1959 CHECK_NUMBER_COERCE_MARKER (*b
);
1960 CHECK_NUMBER_COERCE_MARKER (*e
);
1962 if (XINT (*b
) > XINT (*e
))
1965 tem
= *b
; *b
= *e
; *e
= tem
;
1968 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
1969 args_out_of_range (*b
, *e
);
1972 /* Advance BYTE_POS up to a character boundary
1973 and return the adjusted position. */
1976 advance_to_char_boundary (ptrdiff_t byte_pos
)
1980 if (byte_pos
== BEG
)
1981 /* Beginning of buffer is always a character boundary. */
1984 c
= FETCH_BYTE (byte_pos
);
1985 if (! CHAR_HEAD_P (c
))
1987 /* We should advance BYTE_POS only when C is a constituent of a
1988 multibyte sequence. */
1989 ptrdiff_t orig_byte_pos
= byte_pos
;
1994 c
= FETCH_BYTE (byte_pos
);
1996 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1998 if (byte_pos
< orig_byte_pos
)
1999 byte_pos
= orig_byte_pos
;
2000 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2001 surely advance to the correct character boundary. If C is
2002 not, BYTE_POS was unchanged. */
2009 extern void r_alloc_reset_variable (POINTER_TYPE
*, POINTER_TYPE
*);
2010 #endif /* REL_ALLOC */
2012 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2014 doc
: /* Swap the text between current buffer and BUFFER. */)
2015 (Lisp_Object buffer
)
2017 struct buffer
*other_buffer
;
2018 CHECK_BUFFER (buffer
);
2019 other_buffer
= XBUFFER (buffer
);
2021 if (NILP (BVAR (other_buffer
, name
)))
2022 error ("Cannot swap a dead buffer's text");
2024 /* Actually, it probably works just fine.
2025 * if (other_buffer == current_buffer)
2026 * error ("Cannot swap a buffer's text with itself"); */
2028 /* Actually, this may be workable as well, tho probably only if they're
2030 if (other_buffer
->base_buffer
2031 || current_buffer
->base_buffer
)
2032 error ("Cannot swap indirect buffers's text");
2034 { /* This is probably harder to make work. */
2035 struct buffer
*other
;
2036 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2037 if (other
->base_buffer
== other_buffer
2038 || other
->base_buffer
== current_buffer
)
2039 error ("One of the buffers to swap has indirect buffers");
2042 #define swapfield(field, type) \
2044 type tmp##field = other_buffer->field; \
2045 other_buffer->field = current_buffer->field; \
2046 current_buffer->field = tmp##field; \
2048 #define swapfield_(field, type) \
2050 type tmp##field = BVAR (other_buffer, field); \
2051 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2052 BVAR (current_buffer, field) = tmp##field; \
2055 swapfield (own_text
, struct buffer_text
);
2056 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2057 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2059 r_alloc_reset_variable ((POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
,
2060 (POINTER_TYPE
**) &other_buffer
->own_text
.beg
);
2061 r_alloc_reset_variable ((POINTER_TYPE
**) &other_buffer
->own_text
.beg
,
2062 (POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
);
2063 #endif /* REL_ALLOC */
2065 swapfield (pt
, ptrdiff_t);
2066 swapfield (pt_byte
, ptrdiff_t);
2067 swapfield (begv
, ptrdiff_t);
2068 swapfield (begv_byte
, ptrdiff_t);
2069 swapfield (zv
, ptrdiff_t);
2070 swapfield (zv_byte
, ptrdiff_t);
2071 eassert (!current_buffer
->base_buffer
);
2072 eassert (!other_buffer
->base_buffer
);
2073 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2074 swapfield (newline_cache
, struct region_cache
*);
2075 swapfield (width_run_cache
, struct region_cache
*);
2076 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2077 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2078 swapfield (overlays_before
, struct Lisp_Overlay
*);
2079 swapfield (overlays_after
, struct Lisp_Overlay
*);
2080 swapfield (overlay_center
, ptrdiff_t);
2081 swapfield_ (undo_list
, Lisp_Object
);
2082 swapfield_ (mark
, Lisp_Object
);
2083 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2084 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2085 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2086 /* FIXME: Not sure what we should do with these *_marker fields.
2087 Hopefully they're just nil anyway. */
2088 swapfield_ (pt_marker
, Lisp_Object
);
2089 swapfield_ (begv_marker
, Lisp_Object
);
2090 swapfield_ (zv_marker
, Lisp_Object
);
2091 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2092 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2094 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2095 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2096 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2097 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2098 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2099 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2100 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2102 struct Lisp_Marker
*m
;
2103 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2104 if (m
->buffer
== other_buffer
)
2105 m
->buffer
= current_buffer
;
2107 /* Since there's no indirect buffer in sight, markers on
2108 BUF_MARKERS(buf) should either be for `buf' or dead. */
2109 eassert (!m
->buffer
);
2110 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2111 if (m
->buffer
== current_buffer
)
2112 m
->buffer
= other_buffer
;
2114 /* Since there's no indirect buffer in sight, markers on
2115 BUF_MARKERS(buf) should either be for `buf' or dead. */
2116 eassert (!m
->buffer
);
2118 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2119 So since we just swapped the markers between the two buffers, we need
2120 to undo the effect of this swap for window markers. */
2121 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2122 Lisp_Object buf1
, buf2
;
2123 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2125 while (NILP (Fmemq (w
, ws
)))
2128 if (MARKERP (XWINDOW (w
)->pointm
)
2129 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2130 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2131 Fset_marker (XWINDOW (w
)->pointm
,
2132 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2133 XWINDOW (w
)->buffer
);
2134 w
= Fnext_window (w
, Qt
, Qt
);
2138 if (current_buffer
->text
->intervals
)
2139 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2140 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2141 if (other_buffer
->text
->intervals
)
2142 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2143 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2148 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2150 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2151 If FLAG is t, this makes the buffer a multibyte buffer.
2152 If FLAG is nil, this makes the buffer a single-byte buffer.
2153 In these cases, the buffer contents remain unchanged as a sequence of
2154 bytes but the contents viewed as characters do change.
2155 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2156 all eight-bit bytes to eight-bit characters.
2157 If the multibyte flag was really changed, undo information of the
2158 current buffer is cleared. */)
2161 struct Lisp_Marker
*tail
, *markers
;
2162 struct buffer
*other
;
2164 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2165 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2166 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2167 struct gcpro gcpro1
;
2169 if (current_buffer
->base_buffer
)
2170 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2172 /* Do nothing if nothing actually changes. */
2173 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2178 /* Don't record these buffer changes. We will put a special undo entry
2180 BVAR (current_buffer
, undo_list
) = Qt
;
2182 /* If the cached position is for this buffer, clear it out. */
2183 clear_charpos_cache (current_buffer
);
2186 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2188 begv
= BEGV
, zv
= ZV
;
2195 ptrdiff_t pos
, stop
;
2198 /* Do this first, so it can use CHAR_TO_BYTE
2199 to calculate the old correspondences. */
2200 set_intervals_multibyte (0);
2202 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2208 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2211 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2212 tail
->charpos
= tail
->bytepos
;
2214 /* Convert multibyte form of 8-bit characters to unibyte. */
2229 if (ASCII_BYTE_P (*p
))
2231 else if (CHAR_BYTE8_HEAD_P (*p
))
2233 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2234 /* Delete all bytes for this 8-bit character but the
2235 last one, and change the last one to the character
2238 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2250 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2251 p
+= bytes
, pos
+= bytes
;
2255 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2260 ptrdiff_t pos
, stop
;
2261 unsigned char *p
, *pend
;
2263 /* Be sure not to have a multibyte sequence striding over the GAP.
2264 Ex: We change this: "...abc\302 _GAP_ \241def..."
2265 to: "...abc _GAP_ \302\241def..." */
2268 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2269 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2271 unsigned char *q
= GPT_ADDR
- 1;
2273 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2274 if (LEADING_CODE_P (*q
))
2276 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2278 move_gap_both (new_gpt
, new_gpt
);
2282 /* Make the buffer contents valid as multibyte by converting
2283 8-bit characters to multibyte form. */
2301 if (ASCII_BYTE_P (*p
))
2303 else if (EQ (flag
, Qt
)
2304 && ! CHAR_BYTE8_HEAD_P (*p
)
2305 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2306 p
+= bytes
, pos
+= bytes
;
2309 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2312 c
= BYTE8_TO_CHAR (*p
);
2313 bytes
= CHAR_STRING (c
, tmp
);
2315 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2317 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2318 /* Now the gap is after the just inserted data. */
2336 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2338 /* Do this first, so that chars_in_text asks the right question.
2339 set_intervals_multibyte needs it too. */
2340 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2342 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2343 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2345 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2347 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2348 if (BEGV_BYTE
> GPT_BYTE
)
2349 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2351 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2353 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2354 if (ZV_BYTE
> GPT_BYTE
)
2355 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2357 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2360 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2363 if (byte
> GPT_BYTE
)
2364 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2366 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2367 TEMP_SET_PT_BOTH (position
, byte
);
2370 tail
= markers
= BUF_MARKERS (current_buffer
);
2372 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2373 getting confused by the markers that have not yet been updated.
2374 It is also a signal that it should never create a marker. */
2375 BUF_MARKERS (current_buffer
) = NULL
;
2377 for (; tail
; tail
= tail
->next
)
2379 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2380 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2383 /* Make sure no markers were put on the chain
2384 while the chain value was incorrect. */
2385 if (BUF_MARKERS (current_buffer
))
2388 BUF_MARKERS (current_buffer
) = markers
;
2390 /* Do this last, so it can calculate the new correspondences
2391 between chars and bytes. */
2392 set_intervals_multibyte (1);
2395 if (!EQ (old_undo
, Qt
))
2397 /* Represent all the above changes by a special undo entry. */
2398 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2399 intern ("set-buffer-multibyte"),
2400 NILP (flag
) ? Qt
: Qnil
),
2406 /* Changing the multibyteness of a buffer means that all windows
2407 showing that buffer must be updated thoroughly. */
2408 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2409 ++windows_or_buffers_changed
;
2411 /* Copy this buffer's new multibyte status
2412 into all of its indirect buffers. */
2413 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2414 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2416 BVAR (other
, enable_multibyte_characters
)
2417 = BVAR (current_buffer
, enable_multibyte_characters
);
2418 other
->prevent_redisplay_optimizations_p
= 1;
2421 /* Restore the modifiedness of the buffer. */
2422 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2423 Fset_buffer_modified_p (Qnil
);
2425 /* Update coding systems of this buffer's process (if any). */
2427 Lisp_Object process
;
2429 process
= Fget_buffer_process (Fcurrent_buffer ());
2430 if (PROCESSP (process
))
2431 setup_process_coding_systems (process
);
2437 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2438 Skill_all_local_variables
, 0, 0, 0,
2439 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2440 Most local variable bindings are eliminated so that the default values
2441 become effective once more. Also, the syntax table is set from
2442 `standard-syntax-table', the local keymap is set to nil,
2443 and the abbrev table from `fundamental-mode-abbrev-table'.
2444 This function also forces redisplay of the mode line.
2446 Every function to select a new major mode starts by
2447 calling this function.
2449 As a special exception, local variables whose names have
2450 a non-nil `permanent-local' property are not eliminated by this function.
2452 The first thing this function does is run
2453 the normal hook `change-major-mode-hook'. */)
2456 Frun_hooks (1, &Qchange_major_mode_hook
);
2458 /* Make sure none of the bindings in local_var_alist
2459 remain swapped in, in their symbols. */
2461 swap_out_buffer_local_variables (current_buffer
);
2463 /* Actually eliminate all local bindings of this buffer. */
2465 reset_buffer_local_variables (current_buffer
, 0);
2467 /* Force mode-line redisplay. Useful here because all major mode
2468 commands call this function. */
2469 update_mode_lines
++;
2474 /* Make sure no local variables remain set up with buffer B
2475 for their current values. */
2478 swap_out_buffer_local_variables (struct buffer
*b
)
2480 Lisp_Object oalist
, alist
, buffer
;
2482 XSETBUFFER (buffer
, b
);
2483 oalist
= BVAR (b
, local_var_alist
);
2485 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2487 Lisp_Object sym
= XCAR (XCAR (alist
));
2488 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2489 /* Need not do anything if some other buffer's binding is
2491 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2493 /* Symbol is set up for this buffer's old local value:
2495 swap_in_global_binding (XSYMBOL (sym
));
2500 /* Find all the overlays in the current buffer that contain position POS.
2501 Return the number found, and store them in a vector in *VEC_PTR.
2502 Store in *LEN_PTR the size allocated for the vector.
2503 Store in *NEXT_PTR the next position after POS where an overlay starts,
2504 or ZV if there are no more overlays between POS and ZV.
2505 Store in *PREV_PTR the previous position before POS where an overlay ends,
2506 or where an overlay starts which ends at or after POS;
2507 or BEGV if there are no such overlays from BEGV to POS.
2508 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2510 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2511 when this function is called.
2513 If EXTEND is non-zero, we make the vector bigger if necessary.
2514 If EXTEND is zero, we never extend the vector,
2515 and we store only as many overlays as will fit.
2516 But we still return the total number of overlays.
2518 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2519 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2520 default (BEGV or ZV). */
2523 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2525 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2527 Lisp_Object overlay
, start
, end
;
2528 struct Lisp_Overlay
*tail
;
2530 ptrdiff_t len
= *len_ptr
;
2531 Lisp_Object
*vec
= *vec_ptr
;
2532 ptrdiff_t next
= ZV
;
2533 ptrdiff_t prev
= BEGV
;
2534 int inhibit_storing
= 0;
2536 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2538 ptrdiff_t startpos
, endpos
;
2540 XSETMISC (overlay
, tail
);
2542 start
= OVERLAY_START (overlay
);
2543 end
= OVERLAY_END (overlay
);
2544 endpos
= OVERLAY_POSITION (end
);
2551 startpos
= OVERLAY_POSITION (start
);
2552 /* This one ends at or after POS
2553 so its start counts for PREV_PTR if it's before POS. */
2554 if (prev
< startpos
&& startpos
< pos
)
2558 if (startpos
<= pos
)
2562 /* The supplied vector is full.
2563 Either make it bigger, or don't store any more in it. */
2566 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2572 inhibit_storing
= 1;
2575 if (!inhibit_storing
)
2577 /* Keep counting overlays even if we can't return them all. */
2580 else if (startpos
< next
)
2584 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2586 ptrdiff_t startpos
, endpos
;
2588 XSETMISC (overlay
, tail
);
2590 start
= OVERLAY_START (overlay
);
2591 end
= OVERLAY_END (overlay
);
2592 startpos
= OVERLAY_POSITION (start
);
2595 if (startpos
< next
)
2599 endpos
= OVERLAY_POSITION (end
);
2606 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2612 inhibit_storing
= 1;
2615 if (!inhibit_storing
)
2619 if (startpos
< pos
&& startpos
> prev
)
2622 else if (endpos
< pos
&& endpos
> prev
)
2624 else if (endpos
== pos
&& startpos
> prev
2625 && (!change_req
|| startpos
< pos
))
2636 /* Find all the overlays in the current buffer that overlap the range
2637 BEG-END, or are empty at BEG, or are empty at END provided END
2638 denotes the position at the end of the current buffer.
2640 Return the number found, and store them in a vector in *VEC_PTR.
2641 Store in *LEN_PTR the size allocated for the vector.
2642 Store in *NEXT_PTR the next position after POS where an overlay starts,
2643 or ZV if there are no more overlays.
2644 Store in *PREV_PTR the previous position before POS where an overlay ends,
2645 or BEGV if there are no previous overlays.
2646 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2648 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2649 when this function is called.
2651 If EXTEND is non-zero, we make the vector bigger if necessary.
2652 If EXTEND is zero, we never extend the vector,
2653 and we store only as many overlays as will fit.
2654 But we still return the total number of overlays. */
2657 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2658 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2659 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2661 Lisp_Object overlay
, ostart
, oend
;
2662 struct Lisp_Overlay
*tail
;
2664 ptrdiff_t len
= *len_ptr
;
2665 Lisp_Object
*vec
= *vec_ptr
;
2666 ptrdiff_t next
= ZV
;
2667 ptrdiff_t prev
= BEGV
;
2668 int inhibit_storing
= 0;
2669 int end_is_Z
= end
== Z
;
2671 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2673 ptrdiff_t startpos
, endpos
;
2675 XSETMISC (overlay
, tail
);
2677 ostart
= OVERLAY_START (overlay
);
2678 oend
= OVERLAY_END (overlay
);
2679 endpos
= OVERLAY_POSITION (oend
);
2686 startpos
= OVERLAY_POSITION (ostart
);
2687 /* Count an interval if it overlaps the range, is empty at the
2688 start of the range, or is empty at END provided END denotes the
2689 end of the buffer. */
2690 if ((beg
< endpos
&& startpos
< end
)
2691 || (startpos
== endpos
2692 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2696 /* The supplied vector is full.
2697 Either make it bigger, or don't store any more in it. */
2700 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2706 inhibit_storing
= 1;
2709 if (!inhibit_storing
)
2711 /* Keep counting overlays even if we can't return them all. */
2714 else if (startpos
< next
)
2718 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2720 ptrdiff_t startpos
, endpos
;
2722 XSETMISC (overlay
, tail
);
2724 ostart
= OVERLAY_START (overlay
);
2725 oend
= OVERLAY_END (overlay
);
2726 startpos
= OVERLAY_POSITION (ostart
);
2729 if (startpos
< next
)
2733 endpos
= OVERLAY_POSITION (oend
);
2734 /* Count an interval if it overlaps the range, is empty at the
2735 start of the range, or is empty at END provided END denotes the
2736 end of the buffer. */
2737 if ((beg
< endpos
&& startpos
< end
)
2738 || (startpos
== endpos
2739 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2745 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2751 inhibit_storing
= 1;
2754 if (!inhibit_storing
)
2758 else if (endpos
< beg
&& endpos
> prev
)
2770 /* Return non-zero if there exists an overlay with a non-nil
2771 `mouse-face' property overlapping OVERLAY. */
2774 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2776 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2777 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2778 ptrdiff_t n
, i
, size
;
2779 Lisp_Object
*v
, tem
;
2782 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2783 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2786 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2787 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2790 for (i
= 0; i
< n
; ++i
)
2791 if (!EQ (v
[i
], overlay
)
2792 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2801 /* Fast function to just test if we're at an overlay boundary. */
2803 overlay_touches_p (ptrdiff_t pos
)
2805 Lisp_Object overlay
;
2806 struct Lisp_Overlay
*tail
;
2808 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2812 XSETMISC (overlay
,tail
);
2813 if (!OVERLAYP (overlay
))
2816 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2819 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2823 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2827 XSETMISC (overlay
, tail
);
2828 if (!OVERLAYP (overlay
))
2831 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2834 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2842 Lisp_Object overlay
;
2848 compare_overlays (const void *v1
, const void *v2
)
2850 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2851 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2852 if (s1
->priority
!= s2
->priority
)
2853 return s1
->priority
< s2
->priority
? -1 : 1;
2854 if (s1
->beg
!= s2
->beg
)
2855 return s1
->beg
< s2
->beg
? -1 : 1;
2856 if (s1
->end
!= s2
->end
)
2857 return s2
->end
< s1
->end
? -1 : 1;
2858 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2859 between "equal" overlays. The result can still change between
2860 invocations of Emacs, but it won't change in the middle of
2861 `find_field' (bug#6830). */
2862 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2863 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2867 /* Sort an array of overlays by priority. The array is modified in place.
2868 The return value is the new size; this may be smaller than the original
2869 size if some of the overlays were invalid or were window-specific. */
2871 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2874 struct sortvec
*sortvec
;
2875 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2877 /* Put the valid and relevant overlays into sortvec. */
2879 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2882 Lisp_Object overlay
;
2884 overlay
= overlay_vec
[i
];
2885 if (OVERLAY_VALID (overlay
)
2886 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2887 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2889 /* If we're interested in a specific window, then ignore
2890 overlays that are limited to some other window. */
2895 window
= Foverlay_get (overlay
, Qwindow
);
2896 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2900 /* This overlay is good and counts: put it into sortvec. */
2901 sortvec
[j
].overlay
= overlay
;
2902 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2903 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2904 tem
= Foverlay_get (overlay
, Qpriority
);
2906 sortvec
[j
].priority
= XINT (tem
);
2908 sortvec
[j
].priority
= 0;
2914 /* Sort the overlays into the proper order: increasing priority. */
2917 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2919 for (i
= 0; i
< noverlays
; i
++)
2920 overlay_vec
[i
] = sortvec
[i
].overlay
;
2926 Lisp_Object string
, string2
;
2933 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2934 ptrdiff_t size
; /* Allocated length of that array. */
2935 ptrdiff_t used
; /* How much of the array is currently in use. */
2936 ptrdiff_t bytes
; /* Total length of the strings in buf. */
2939 /* Buffers for storing information about the overlays touching a given
2940 position. These could be automatic variables in overlay_strings, but
2941 it's more efficient to hold onto the memory instead of repeatedly
2942 allocating and freeing it. */
2943 static struct sortstrlist overlay_heads
, overlay_tails
;
2944 static unsigned char *overlay_str_buf
;
2946 /* Allocated length of overlay_str_buf. */
2947 static ptrdiff_t overlay_str_len
;
2949 /* A comparison function suitable for passing to qsort. */
2951 cmp_for_strings (const void *as1
, const void *as2
)
2953 struct sortstr
*s1
= (struct sortstr
*)as1
;
2954 struct sortstr
*s2
= (struct sortstr
*)as2
;
2955 if (s1
->size
!= s2
->size
)
2956 return s2
->size
< s1
->size
? -1 : 1;
2957 if (s1
->priority
!= s2
->priority
)
2958 return s1
->priority
< s2
->priority
? -1 : 1;
2963 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2964 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2968 if (ssl
->used
== ssl
->size
)
2969 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
2970 ssl
->buf
[ssl
->used
].string
= str
;
2971 ssl
->buf
[ssl
->used
].string2
= str2
;
2972 ssl
->buf
[ssl
->used
].size
= size
;
2973 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2976 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2977 nbytes
= SCHARS (str
);
2978 else if (! STRING_MULTIBYTE (str
))
2979 nbytes
= count_size_as_multibyte (SDATA (str
),
2982 nbytes
= SBYTES (str
);
2984 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2985 memory_full (SIZE_MAX
);
2986 ssl
->bytes
+= nbytes
;
2990 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2991 nbytes
= SCHARS (str2
);
2992 else if (! STRING_MULTIBYTE (str2
))
2993 nbytes
= count_size_as_multibyte (SDATA (str2
),
2996 nbytes
= SBYTES (str2
);
2998 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2999 memory_full (SIZE_MAX
);
3000 ssl
->bytes
+= nbytes
;
3004 /* Return the concatenation of the strings associated with overlays that
3005 begin or end at POS, ignoring overlays that are specific to a window
3006 other than W. The strings are concatenated in the appropriate order:
3007 shorter overlays nest inside longer ones, and higher priority inside
3008 lower. Normally all of the after-strings come first, but zero-sized
3009 overlays have their after-strings ride along with the before-strings
3010 because it would look strange to print them inside-out.
3012 Returns the string length, and stores the contents indirectly through
3013 PSTR, if that variable is non-null. The string may be overwritten by
3014 subsequent calls. */
3017 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3019 Lisp_Object overlay
, window
, str
;
3020 struct Lisp_Overlay
*ov
;
3021 ptrdiff_t startpos
, endpos
;
3022 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3024 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3025 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3026 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3028 XSETMISC (overlay
, ov
);
3029 eassert (OVERLAYP (overlay
));
3031 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3032 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3035 if (endpos
!= pos
&& startpos
!= pos
)
3037 window
= Foverlay_get (overlay
, Qwindow
);
3038 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3041 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3042 record_overlay_string (&overlay_heads
, str
,
3044 ? Foverlay_get (overlay
, Qafter_string
)
3046 Foverlay_get (overlay
, Qpriority
),
3048 else if (endpos
== pos
3049 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3050 record_overlay_string (&overlay_tails
, str
, Qnil
,
3051 Foverlay_get (overlay
, Qpriority
),
3054 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3056 XSETMISC (overlay
, ov
);
3057 eassert (OVERLAYP (overlay
));
3059 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3060 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3063 if (endpos
!= pos
&& startpos
!= pos
)
3065 window
= Foverlay_get (overlay
, Qwindow
);
3066 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3069 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3070 record_overlay_string (&overlay_heads
, str
,
3072 ? Foverlay_get (overlay
, Qafter_string
)
3074 Foverlay_get (overlay
, Qpriority
),
3076 else if (endpos
== pos
3077 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3078 record_overlay_string (&overlay_tails
, str
, Qnil
,
3079 Foverlay_get (overlay
, Qpriority
),
3082 if (overlay_tails
.used
> 1)
3083 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3085 if (overlay_heads
.used
> 1)
3086 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3088 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3095 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3096 memory_full (SIZE_MAX
);
3097 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3098 if (total
> overlay_str_len
)
3099 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3100 total
- overlay_str_len
, -1, 1);
3102 p
= overlay_str_buf
;
3103 for (i
= overlay_tails
.used
; --i
>= 0;)
3106 tem
= overlay_tails
.buf
[i
].string
;
3107 nbytes
= copy_text (SDATA (tem
), p
,
3109 STRING_MULTIBYTE (tem
), multibyte
);
3112 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3115 tem
= overlay_heads
.buf
[i
].string
;
3116 nbytes
= copy_text (SDATA (tem
), p
,
3118 STRING_MULTIBYTE (tem
), multibyte
);
3120 tem
= overlay_heads
.buf
[i
].string2
;
3123 nbytes
= copy_text (SDATA (tem
), p
,
3125 STRING_MULTIBYTE (tem
), multibyte
);
3129 if (p
!= overlay_str_buf
+ total
)
3132 *pstr
= overlay_str_buf
;
3138 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3141 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3143 Lisp_Object overlay
, beg
, end
;
3144 struct Lisp_Overlay
*prev
, *tail
, *next
;
3146 /* See if anything in overlays_before should move to overlays_after. */
3148 /* We don't strictly need prev in this loop; it should always be nil.
3149 But we use it for symmetry and in case that should cease to be true
3150 with some future change. */
3152 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3155 XSETMISC (overlay
, tail
);
3157 /* If the overlay is not valid, get rid of it. */
3158 if (!OVERLAY_VALID (overlay
))
3163 /* Splice the cons cell TAIL out of overlays_before. */
3167 buf
->overlays_before
= next
;
3173 beg
= OVERLAY_START (overlay
);
3174 end
= OVERLAY_END (overlay
);
3176 if (OVERLAY_POSITION (end
) > pos
)
3178 /* OVERLAY needs to be moved. */
3179 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3180 struct Lisp_Overlay
*other
, *other_prev
;
3182 /* Splice the cons cell TAIL out of overlays_before. */
3186 buf
->overlays_before
= next
;
3188 /* Search thru overlays_after for where to put it. */
3190 for (other
= buf
->overlays_after
; other
;
3191 other_prev
= other
, other
= other
->next
)
3193 Lisp_Object otherbeg
, otheroverlay
;
3195 XSETMISC (otheroverlay
, other
);
3196 eassert (OVERLAY_VALID (otheroverlay
));
3198 otherbeg
= OVERLAY_START (otheroverlay
);
3199 if (OVERLAY_POSITION (otherbeg
) >= where
)
3203 /* Add TAIL to overlays_after before OTHER. */
3206 other_prev
->next
= tail
;
3208 buf
->overlays_after
= tail
;
3212 /* We've reached the things that should stay in overlays_before.
3213 All the rest of overlays_before must end even earlier,
3218 /* See if anything in overlays_after should be in overlays_before. */
3220 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3223 XSETMISC (overlay
, tail
);
3225 /* If the overlay is not valid, get rid of it. */
3226 if (!OVERLAY_VALID (overlay
))
3231 /* Splice the cons cell TAIL out of overlays_after. */
3235 buf
->overlays_after
= next
;
3241 beg
= OVERLAY_START (overlay
);
3242 end
= OVERLAY_END (overlay
);
3244 /* Stop looking, when we know that nothing further
3245 can possibly end before POS. */
3246 if (OVERLAY_POSITION (beg
) > pos
)
3249 if (OVERLAY_POSITION (end
) <= pos
)
3251 /* OVERLAY needs to be moved. */
3252 ptrdiff_t where
= OVERLAY_POSITION (end
);
3253 struct Lisp_Overlay
*other
, *other_prev
;
3255 /* Splice the cons cell TAIL out of overlays_after. */
3259 buf
->overlays_after
= next
;
3261 /* Search thru overlays_before for where to put it. */
3263 for (other
= buf
->overlays_before
; other
;
3264 other_prev
= other
, other
= other
->next
)
3266 Lisp_Object otherend
, otheroverlay
;
3268 XSETMISC (otheroverlay
, other
);
3269 eassert (OVERLAY_VALID (otheroverlay
));
3271 otherend
= OVERLAY_END (otheroverlay
);
3272 if (OVERLAY_POSITION (otherend
) <= where
)
3276 /* Add TAIL to overlays_before before OTHER. */
3279 other_prev
->next
= tail
;
3281 buf
->overlays_before
= tail
;
3286 buf
->overlay_center
= pos
;
3290 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3292 /* After an insertion, the lists are still sorted properly,
3293 but we may need to update the value of the overlay center. */
3294 if (current_buffer
->overlay_center
>= pos
)
3295 current_buffer
->overlay_center
+= length
;
3299 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3301 if (current_buffer
->overlay_center
< pos
)
3302 /* The deletion was to our right. No change needed; the before- and
3303 after-lists are still consistent. */
3305 else if (current_buffer
->overlay_center
- pos
> length
)
3306 /* The deletion was to our left. We need to adjust the center value
3307 to account for the change in position, but the lists are consistent
3308 given the new value. */
3309 current_buffer
->overlay_center
-= length
;
3311 /* We're right in the middle. There might be things on the after-list
3312 that now belong on the before-list. Recentering will move them,
3313 and also update the center point. */
3314 recenter_overlay_lists (current_buffer
, pos
);
3317 /* Fix up overlays that were garbled as a result of permuting markers
3318 in the range START through END. Any overlay with at least one
3319 endpoint in this range will need to be unlinked from the overlay
3320 list and reinserted in its proper place.
3321 Such an overlay might even have negative size at this point.
3322 If so, we'll make the overlay empty. */
3324 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3326 Lisp_Object overlay
;
3327 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3328 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3329 /* These are either nil, indicating that before_list or after_list
3330 should be assigned, or the cons cell the cdr of which should be
3332 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3333 /* 'Parent', likewise, indicates a cons cell or
3334 current_buffer->overlays_before or overlays_after, depending
3335 which loop we're in. */
3336 struct Lisp_Overlay
*tail
, *parent
;
3337 ptrdiff_t startpos
, endpos
;
3339 /* This algorithm shifts links around instead of consing and GCing.
3340 The loop invariant is that before_list (resp. after_list) is a
3341 well-formed list except that its last element, the CDR of beforep
3342 (resp. afterp) if beforep (afterp) isn't nil or before_list
3343 (after_list) if it is, is still uninitialized. So it's not a bug
3344 that before_list isn't initialized, although it may look
3346 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3348 XSETMISC (overlay
, tail
);
3350 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3351 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3353 /* If the overlay is backwards, make it empty. */
3354 if (endpos
< startpos
)
3357 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3365 || (startpos
>= start
&& startpos
< end
))
3367 /* Add it to the end of the wrong list. Later on,
3368 recenter_overlay_lists will move it to the right place. */
3369 if (endpos
< current_buffer
->overlay_center
)
3374 afterp
->next
= tail
;
3382 beforep
->next
= tail
;
3386 current_buffer
->overlays_before
= tail
->next
;
3388 parent
->next
= tail
->next
;
3392 parent
= tail
, tail
= parent
->next
;
3394 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3396 XSETMISC (overlay
, tail
);
3398 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3399 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3401 /* If the overlay is backwards, make it empty. */
3402 if (endpos
< startpos
)
3405 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3409 if (startpos
>= end
)
3412 if (startpos
>= start
3413 || (endpos
>= start
&& endpos
< end
))
3415 if (endpos
< current_buffer
->overlay_center
)
3420 afterp
->next
= tail
;
3428 beforep
->next
= tail
;
3432 current_buffer
->overlays_after
= tail
->next
;
3434 parent
->next
= tail
->next
;
3438 parent
= tail
, tail
= parent
->next
;
3441 /* Splice the constructed (wrong) lists into the buffer's lists,
3442 and let the recenter function make it sane again. */
3445 beforep
->next
= current_buffer
->overlays_before
;
3446 current_buffer
->overlays_before
= before_list
;
3448 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3452 afterp
->next
= current_buffer
->overlays_after
;
3453 current_buffer
->overlays_after
= after_list
;
3455 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3458 /* We have two types of overlay: the one whose ending marker is
3459 after-insertion-marker (this is the usual case) and the one whose
3460 ending marker is before-insertion-marker. When `overlays_before'
3461 contains overlays of the latter type and the former type in this
3462 order and both overlays end at inserting position, inserting a text
3463 increases only the ending marker of the latter type, which results
3464 in incorrect ordering of `overlays_before'.
3466 This function fixes ordering of overlays in the slot
3467 `overlays_before' of the buffer *BP. Before the insertion, `point'
3468 was at PREV, and now is at POS. */
3471 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3473 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3474 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3476 ptrdiff_t end
IF_LINT (= 0);
3478 /* After the insertion, the several overlays may be in incorrect
3479 order. The possibility is that, in the list `overlays_before',
3480 an overlay which ends at POS appears after an overlay which ends
3481 at PREV. Since POS is greater than PREV, we must fix the
3482 ordering of these overlays, by moving overlays ends at POS before
3483 the overlays ends at PREV. */
3485 /* At first, find a place where disordered overlays should be linked
3486 in. It is where an overlay which end before POS exists. (i.e. an
3487 overlay whose ending marker is after-insertion-marker if disorder
3490 && (XSETMISC (tem
, tail
),
3491 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3497 /* If we don't find such an overlay,
3498 or the found one ends before PREV,
3499 or the found one is the last one in the list,
3500 we don't have to fix anything. */
3501 if (!tail
|| end
< prev
|| !tail
->next
)
3504 right_pair
= parent
;
3508 /* Now, end position of overlays in the list TAIL should be before
3509 or equal to PREV. In the loop, an overlay which ends at POS is
3510 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3511 we found an overlay which ends before PREV, the remaining
3512 overlays are in correct order. */
3515 XSETMISC (tem
, tail
);
3516 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3519 { /* This overlay is disordered. */
3520 struct Lisp_Overlay
*found
= tail
;
3522 /* Unlink the found overlay. */
3524 parent
->next
= tail
;
3525 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3526 and link it into the right place. */
3529 found
->next
= bp
->overlays_before
;
3530 bp
->overlays_before
= found
;
3534 found
->next
= right_pair
->next
;
3535 right_pair
->next
= found
;
3538 else if (end
== prev
)
3543 else /* No more disordered overlay. */
3548 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3549 doc
: /* Return t if OBJECT is an overlay. */)
3550 (Lisp_Object object
)
3552 return (OVERLAYP (object
) ? Qt
: Qnil
);
3555 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3556 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3557 If omitted, BUFFER defaults to the current buffer.
3558 BEG and END may be integers or markers.
3559 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3560 for the front of the overlay advance when text is inserted there
3561 \(which means the text *is not* included in the overlay).
3562 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3563 for the rear of the overlay advance when text is inserted there
3564 \(which means the text *is* included in the overlay). */)
3565 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3567 Lisp_Object overlay
;
3571 XSETBUFFER (buffer
, current_buffer
);
3573 CHECK_BUFFER (buffer
);
3575 && ! EQ (Fmarker_buffer (beg
), buffer
))
3576 error ("Marker points into wrong buffer");
3578 && ! EQ (Fmarker_buffer (end
), buffer
))
3579 error ("Marker points into wrong buffer");
3581 CHECK_NUMBER_COERCE_MARKER (beg
);
3582 CHECK_NUMBER_COERCE_MARKER (end
);
3584 if (XINT (beg
) > XINT (end
))
3587 temp
= beg
; beg
= end
; end
= temp
;
3590 b
= XBUFFER (buffer
);
3592 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3593 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3595 if (!NILP (front_advance
))
3596 XMARKER (beg
)->insertion_type
= 1;
3597 if (!NILP (rear_advance
))
3598 XMARKER (end
)->insertion_type
= 1;
3600 overlay
= allocate_misc ();
3601 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3602 XOVERLAY (overlay
)->start
= beg
;
3603 XOVERLAY (overlay
)->end
= end
;
3604 XOVERLAY (overlay
)->plist
= Qnil
;
3605 XOVERLAY (overlay
)->next
= NULL
;
3607 /* Put the new overlay on the wrong list. */
3608 end
= OVERLAY_END (overlay
);
3609 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3611 if (b
->overlays_after
)
3612 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3613 b
->overlays_after
= XOVERLAY (overlay
);
3617 if (b
->overlays_before
)
3618 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3619 b
->overlays_before
= XOVERLAY (overlay
);
3622 /* This puts it in the right list, and in the right order. */
3623 recenter_overlay_lists (b
, b
->overlay_center
);
3625 /* We don't need to redisplay the region covered by the overlay, because
3626 the overlay has no properties at the moment. */
3631 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3634 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3638 ptrdiff_t temp
= start
;
3643 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3645 /* If this is a buffer not in the selected window,
3646 we must do other windows. */
3647 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3648 windows_or_buffers_changed
= 1;
3649 /* If multiple windows show this buffer, we must do other windows. */
3650 else if (buffer_shared
> 1)
3651 windows_or_buffers_changed
= 1;
3652 /* If we modify an overlay at the end of the buffer, we cannot
3653 be sure that window end is still valid. */
3654 else if (end
>= ZV
&& start
<= ZV
)
3655 windows_or_buffers_changed
= 1;
3657 ++BUF_OVERLAY_MODIFF (buf
);
3661 static struct Lisp_Overlay
*
3662 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3664 struct Lisp_Overlay
*tmp
, *prev
;
3665 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3669 prev
->next
= tmp
->next
;
3672 overlay
->next
= NULL
;
3678 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3679 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3680 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3681 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3683 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3685 struct buffer
*b
, *ob
;
3686 Lisp_Object obuffer
;
3687 ptrdiff_t count
= SPECPDL_INDEX ();
3688 ptrdiff_t n_beg
, n_end
;
3690 CHECK_OVERLAY (overlay
);
3692 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3694 XSETBUFFER (buffer
, current_buffer
);
3695 CHECK_BUFFER (buffer
);
3698 && ! EQ (Fmarker_buffer (beg
), buffer
))
3699 error ("Marker points into wrong buffer");
3701 && ! EQ (Fmarker_buffer (end
), buffer
))
3702 error ("Marker points into wrong buffer");
3704 CHECK_NUMBER_COERCE_MARKER (beg
);
3705 CHECK_NUMBER_COERCE_MARKER (end
);
3707 if (XINT (beg
) > XINT (end
))
3710 temp
= beg
; beg
= end
; end
= temp
;
3713 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3714 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3715 n_beg
= marker_position (OVERLAY_START (overlay
));
3716 n_end
= marker_position (OVERLAY_END (overlay
));
3718 if (n_beg
== n_end
&& ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3719 return Fdelete_overlay (overlay
);
3721 specbind (Qinhibit_quit
, Qt
);
3723 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3724 b
= XBUFFER (buffer
);
3725 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3727 /* If the overlay has changed buffers, do a thorough redisplay. */
3728 if (!EQ (buffer
, obuffer
))
3730 /* Redisplay where the overlay was. */
3731 if (!NILP (obuffer
))
3736 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3737 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3739 modify_overlay (ob
, o_beg
, o_end
);
3742 /* Redisplay where the overlay is going to be. */
3743 modify_overlay (b
, n_beg
, n_end
);
3746 /* Redisplay the area the overlay has just left, or just enclosed. */
3748 ptrdiff_t o_beg
, o_end
;
3750 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3751 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3754 modify_overlay (b
, o_end
, n_end
);
3755 else if (o_end
== n_end
)
3756 modify_overlay (b
, o_beg
, n_beg
);
3758 modify_overlay (b
, min (o_beg
, n_beg
), max (o_end
, n_end
));
3761 if (!NILP (obuffer
))
3764 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3766 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3767 eassert (XOVERLAY (overlay
)->next
== NULL
);
3770 /* Put the overlay on the wrong list. */
3771 if (n_end
< b
->overlay_center
)
3773 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3774 b
->overlays_after
= XOVERLAY (overlay
);
3778 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3779 b
->overlays_before
= XOVERLAY (overlay
);
3782 /* This puts it in the right list, and in the right order. */
3783 recenter_overlay_lists (b
, b
->overlay_center
);
3785 return unbind_to (count
, overlay
);
3788 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3789 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3790 (Lisp_Object overlay
)
3794 ptrdiff_t count
= SPECPDL_INDEX ();
3796 CHECK_OVERLAY (overlay
);
3798 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3802 b
= XBUFFER (buffer
);
3803 specbind (Qinhibit_quit
, Qt
);
3805 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3806 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3807 eassert (XOVERLAY (overlay
)->next
== NULL
);
3809 marker_position (OVERLAY_START (overlay
)),
3810 marker_position (OVERLAY_END (overlay
)));
3811 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3812 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3814 /* When deleting an overlay with before or after strings, turn off
3815 display optimizations for the affected buffer, on the basis that
3816 these strings may contain newlines. This is easier to do than to
3817 check for that situation during redisplay. */
3818 if (!windows_or_buffers_changed
3819 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3820 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3821 b
->prevent_redisplay_optimizations_p
= 1;
3823 return unbind_to (count
, Qnil
);
3826 /* Overlay dissection functions. */
3828 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3829 doc
: /* Return the position at which OVERLAY starts. */)
3830 (Lisp_Object overlay
)
3832 CHECK_OVERLAY (overlay
);
3834 return (Fmarker_position (OVERLAY_START (overlay
)));
3837 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3838 doc
: /* Return the position at which OVERLAY ends. */)
3839 (Lisp_Object overlay
)
3841 CHECK_OVERLAY (overlay
);
3843 return (Fmarker_position (OVERLAY_END (overlay
)));
3846 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3847 doc
: /* Return the buffer OVERLAY belongs to.
3848 Return nil if OVERLAY has been deleted. */)
3849 (Lisp_Object overlay
)
3851 CHECK_OVERLAY (overlay
);
3853 return Fmarker_buffer (OVERLAY_START (overlay
));
3856 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3857 doc
: /* Return a list of the properties on OVERLAY.
3858 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3860 (Lisp_Object overlay
)
3862 CHECK_OVERLAY (overlay
);
3864 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3868 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3869 doc
: /* Return a list of the overlays that contain the character at POS. */)
3872 ptrdiff_t len
, noverlays
;
3873 Lisp_Object
*overlay_vec
;
3876 CHECK_NUMBER_COERCE_MARKER (pos
);
3879 /* We can't use alloca here because overlays_at can call xrealloc. */
3880 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3882 /* Put all the overlays we want in a vector in overlay_vec.
3883 Store the length in len. */
3884 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3887 /* Make a list of them all. */
3888 result
= Flist (noverlays
, overlay_vec
);
3890 xfree (overlay_vec
);
3894 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3895 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3896 Overlap means that at least one character is contained within the overlay
3897 and also contained within the specified region.
3898 Empty overlays are included in the result if they are located at BEG,
3899 between BEG and END, or at END provided END denotes the position at the
3900 end of the buffer. */)
3901 (Lisp_Object beg
, Lisp_Object end
)
3903 ptrdiff_t len
, noverlays
;
3904 Lisp_Object
*overlay_vec
;
3907 CHECK_NUMBER_COERCE_MARKER (beg
);
3908 CHECK_NUMBER_COERCE_MARKER (end
);
3911 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3913 /* Put all the overlays we want in a vector in overlay_vec.
3914 Store the length in len. */
3915 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3918 /* Make a list of them all. */
3919 result
= Flist (noverlays
, overlay_vec
);
3921 xfree (overlay_vec
);
3925 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3927 doc
: /* Return the next position after POS where an overlay starts or ends.
3928 If there are no overlay boundaries from POS to (point-max),
3929 the value is (point-max). */)
3932 ptrdiff_t i
, len
, noverlays
;
3934 Lisp_Object
*overlay_vec
;
3936 CHECK_NUMBER_COERCE_MARKER (pos
);
3939 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3941 /* Put all the overlays we want in a vector in overlay_vec.
3942 Store the length in len.
3943 endpos gets the position where the next overlay starts. */
3944 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3947 /* If any of these overlays ends before endpos,
3948 use its ending point instead. */
3949 for (i
= 0; i
< noverlays
; i
++)
3954 oend
= OVERLAY_END (overlay_vec
[i
]);
3955 oendpos
= OVERLAY_POSITION (oend
);
3956 if (oendpos
< endpos
)
3960 xfree (overlay_vec
);
3961 return make_number (endpos
);
3964 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3965 Sprevious_overlay_change
, 1, 1, 0,
3966 doc
: /* Return the previous position before POS where an overlay starts or ends.
3967 If there are no overlay boundaries from (point-min) to POS,
3968 the value is (point-min). */)
3972 Lisp_Object
*overlay_vec
;
3975 CHECK_NUMBER_COERCE_MARKER (pos
);
3977 /* At beginning of buffer, we know the answer;
3978 avoid bug subtracting 1 below. */
3979 if (XINT (pos
) == BEGV
)
3983 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3985 /* Put all the overlays we want in a vector in overlay_vec.
3986 Store the length in len.
3987 prevpos gets the position of the previous change. */
3988 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3991 xfree (overlay_vec
);
3992 return make_number (prevpos
);
3995 /* These functions are for debugging overlays. */
3997 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3998 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3999 The car has all the overlays before the overlay center;
4000 the cdr has all the overlays after the overlay center.
4001 Recentering overlays moves overlays between these lists.
4002 The lists you get are copies, so that changing them has no effect.
4003 However, the overlays you get are the real objects that the buffer uses. */)
4006 struct Lisp_Overlay
*ol
;
4007 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4008 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4011 before
= Fcons (tmp
, before
);
4013 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4016 after
= Fcons (tmp
, after
);
4018 return Fcons (Fnreverse (before
), Fnreverse (after
));
4021 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4022 doc
: /* Recenter the overlays of the current buffer around position POS.
4023 That makes overlay lookup faster for positions near POS (but perhaps slower
4024 for positions far away from POS). */)
4028 CHECK_NUMBER_COERCE_MARKER (pos
);
4030 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4031 recenter_overlay_lists (current_buffer
, p
);
4035 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4036 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4037 (Lisp_Object overlay
, Lisp_Object prop
)
4039 CHECK_OVERLAY (overlay
);
4040 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4043 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4044 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4045 VALUE will be returned.*/)
4046 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4048 Lisp_Object tail
, buffer
;
4051 CHECK_OVERLAY (overlay
);
4053 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4055 for (tail
= XOVERLAY (overlay
)->plist
;
4056 CONSP (tail
) && CONSP (XCDR (tail
));
4057 tail
= XCDR (XCDR (tail
)))
4058 if (EQ (XCAR (tail
), prop
))
4060 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4061 XSETCAR (XCDR (tail
), value
);
4064 /* It wasn't in the list, so add it to the front. */
4065 changed
= !NILP (value
);
4066 XOVERLAY (overlay
)->plist
4067 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4069 if (! NILP (buffer
))
4072 modify_overlay (XBUFFER (buffer
),
4073 marker_position (OVERLAY_START (overlay
)),
4074 marker_position (OVERLAY_END (overlay
)));
4075 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4076 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4077 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4078 Fdelete_overlay (overlay
);
4084 /* Subroutine of report_overlay_modification. */
4086 /* Lisp vector holding overlay hook functions to call.
4087 Vector elements come in pairs.
4088 Each even-index element is a list of hook functions.
4089 The following odd-index element is the overlay they came from.
4091 Before the buffer change, we fill in this vector
4092 as we call overlay hook functions.
4093 After the buffer change, we get the functions to call from this vector.
4094 This way we always call the same functions before and after the change. */
4095 static Lisp_Object last_overlay_modification_hooks
;
4097 /* Number of elements actually used in last_overlay_modification_hooks. */
4098 static ptrdiff_t last_overlay_modification_hooks_used
;
4100 /* Add one functionlist/overlay pair
4101 to the end of last_overlay_modification_hooks. */
4104 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4106 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4108 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4109 last_overlay_modification_hooks
=
4110 larger_vector (last_overlay_modification_hooks
, 2, -1);
4111 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4112 functionlist
); last_overlay_modification_hooks_used
++;
4113 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4114 overlay
); last_overlay_modification_hooks_used
++;
4117 /* Run the modification-hooks of overlays that include
4118 any part of the text in START to END.
4119 If this change is an insertion, also
4120 run the insert-before-hooks of overlay starting at END,
4121 and the insert-after-hooks of overlay ending at START.
4123 This is called both before and after the modification.
4124 AFTER is nonzero when we call after the modification.
4126 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4127 When AFTER is nonzero, they are the start position,
4128 the position after the inserted new text,
4129 and the length of deleted or replaced old text. */
4132 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4133 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4135 Lisp_Object prop
, overlay
;
4136 struct Lisp_Overlay
*tail
;
4137 /* 1 if this change is an insertion. */
4138 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4139 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4144 /* We used to run the functions as soon as we found them and only register
4145 them in last_overlay_modification_hooks for the purpose of the `after'
4146 case. But running elisp code as we traverse the list of overlays is
4147 painful because the list can be modified by the elisp code so we had to
4148 copy at several places. We now simply do a read-only traversal that
4149 only collects the functions to run and we run them afterwards. It's
4150 simpler, especially since all the code was already there. -stef */
4154 /* We are being called before a change.
4155 Scan the overlays to find the functions to call. */
4156 last_overlay_modification_hooks_used
= 0;
4157 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4159 ptrdiff_t startpos
, endpos
;
4160 Lisp_Object ostart
, oend
;
4162 XSETMISC (overlay
, tail
);
4164 ostart
= OVERLAY_START (overlay
);
4165 oend
= OVERLAY_END (overlay
);
4166 endpos
= OVERLAY_POSITION (oend
);
4167 if (XFASTINT (start
) > endpos
)
4169 startpos
= OVERLAY_POSITION (ostart
);
4170 if (insertion
&& (XFASTINT (start
) == startpos
4171 || XFASTINT (end
) == startpos
))
4173 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4175 add_overlay_mod_hooklist (prop
, overlay
);
4177 if (insertion
&& (XFASTINT (start
) == endpos
4178 || XFASTINT (end
) == endpos
))
4180 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4182 add_overlay_mod_hooklist (prop
, overlay
);
4184 /* Test for intersecting intervals. This does the right thing
4185 for both insertion and deletion. */
4186 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4188 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4190 add_overlay_mod_hooklist (prop
, overlay
);
4194 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4196 ptrdiff_t startpos
, endpos
;
4197 Lisp_Object ostart
, oend
;
4199 XSETMISC (overlay
, tail
);
4201 ostart
= OVERLAY_START (overlay
);
4202 oend
= OVERLAY_END (overlay
);
4203 startpos
= OVERLAY_POSITION (ostart
);
4204 endpos
= OVERLAY_POSITION (oend
);
4205 if (XFASTINT (end
) < startpos
)
4207 if (insertion
&& (XFASTINT (start
) == startpos
4208 || XFASTINT (end
) == startpos
))
4210 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4212 add_overlay_mod_hooklist (prop
, overlay
);
4214 if (insertion
&& (XFASTINT (start
) == endpos
4215 || XFASTINT (end
) == endpos
))
4217 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4219 add_overlay_mod_hooklist (prop
, overlay
);
4221 /* Test for intersecting intervals. This does the right thing
4222 for both insertion and deletion. */
4223 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4225 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4227 add_overlay_mod_hooklist (prop
, overlay
);
4232 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4234 /* Call the functions recorded in last_overlay_modification_hooks.
4235 First copy the vector contents, in case some of these hooks
4236 do subsequent modification of the buffer. */
4237 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4238 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4241 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4242 size
* sizeof (Lisp_Object
));
4244 gcpro1
.nvars
= size
;
4246 for (i
= 0; i
< size
;)
4248 Lisp_Object prop_i
, overlay_i
;
4250 overlay_i
= copy
[i
++];
4251 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4258 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4259 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4261 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4263 GCPRO4 (list
, arg1
, arg2
, arg3
);
4265 while (CONSP (list
))
4268 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4270 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4276 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4279 evaporate_overlays (ptrdiff_t pos
)
4281 Lisp_Object overlay
, hit_list
;
4282 struct Lisp_Overlay
*tail
;
4285 if (pos
<= current_buffer
->overlay_center
)
4286 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4289 XSETMISC (overlay
, tail
);
4290 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4293 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4294 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4295 hit_list
= Fcons (overlay
, hit_list
);
4298 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4301 XSETMISC (overlay
, tail
);
4302 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4305 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4306 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4307 hit_list
= Fcons (overlay
, hit_list
);
4309 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4310 Fdelete_overlay (XCAR (hit_list
));
4313 /* Somebody has tried to store a value with an unacceptable type
4314 in the slot with offset OFFSET. */
4317 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4319 Lisp_Object predicate
;
4323 case_Lisp_Int
: predicate
= Qintegerp
; break;
4324 case Lisp_String
: predicate
= Qstringp
; break;
4325 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4329 wrong_type_argument (predicate
, newval
);
4333 /***********************************************************************
4334 Allocation with mmap
4335 ***********************************************************************/
4337 #ifdef USE_MMAP_FOR_BUFFERS
4339 #include <sys/types.h>
4340 #include <sys/mman.h>
4343 #ifdef MAP_ANONYMOUS
4344 #define MAP_ANON MAP_ANONYMOUS
4351 #define MAP_FAILED ((void *) -1)
4363 /* Memory is allocated in regions which are mapped using mmap(2).
4364 The current implementation lets the system select mapped
4365 addresses; we're not using MAP_FIXED in general, except when
4366 trying to enlarge regions.
4368 Each mapped region starts with a mmap_region structure, the user
4369 area starts after that structure, aligned to MEM_ALIGN.
4371 +-----------------------+
4372 | struct mmap_info + |
4374 +-----------------------+
4378 +-----------------------+ */
4382 /* User-specified size. */
4383 size_t nbytes_specified
;
4385 /* Number of bytes mapped */
4386 size_t nbytes_mapped
;
4388 /* Pointer to the location holding the address of the memory
4389 allocated with the mmap'd block. The variable actually points
4390 after this structure. */
4393 /* Next and previous in list of all mmap'd regions. */
4394 struct mmap_region
*next
, *prev
;
4397 /* Doubly-linked list of mmap'd regions. */
4399 static struct mmap_region
*mmap_regions
;
4401 /* File descriptor for mmap. If we don't have anonymous mapping,
4402 /dev/zero will be opened on it. */
4406 /* Temporary storage for mmap_set_vars, see there. */
4408 static struct mmap_region
*mmap_regions_1
;
4409 static int mmap_fd_1
;
4411 /* Page size on this system. */
4413 static int mmap_page_size
;
4415 /* 1 means mmap has been initialized. */
4417 static int mmap_initialized_p
;
4419 /* Value is X rounded up to the next multiple of N. */
4421 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4423 /* Size of mmap_region structure plus padding. */
4425 #define MMAP_REGION_STRUCT_SIZE \
4426 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4428 /* Given a pointer P to the start of the user-visible part of a mapped
4429 region, return a pointer to the start of the region. */
4431 #define MMAP_REGION(P) \
4432 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4434 /* Given a pointer P to the start of a mapped region, return a pointer
4435 to the start of the user-visible part of the region. */
4437 #define MMAP_USER_AREA(P) \
4438 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4440 #define MEM_ALIGN sizeof (double)
4442 /* Predicate returning true if part of the address range [START .. END]
4443 is currently mapped. Used to prevent overwriting an existing
4446 Default is to conservatively assume the address range is occupied by
4447 something else. This can be overridden by system configuration
4448 files if system-specific means to determine this exists. */
4450 #ifndef MMAP_ALLOCATED_P
4451 #define MMAP_ALLOCATED_P(start, end) 1
4454 /* Perform necessary initializations for the use of mmap. */
4460 /* The value of mmap_fd is initially 0 in temacs, and -1
4461 in a dumped Emacs. */
4464 /* No anonymous mmap -- we need the file descriptor. */
4465 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4467 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4469 #endif /* MAP_ANON == 0 */
4471 if (mmap_initialized_p
)
4473 mmap_initialized_p
= 1;
4479 mmap_page_size
= getpagesize ();
4482 /* Return a region overlapping address range START...END, or null if
4483 none. END is not including, i.e. the last byte in the range
4486 static struct mmap_region
*
4487 mmap_find (POINTER_TYPE
*start
, POINTER_TYPE
*end
)
4489 struct mmap_region
*r
;
4490 char *s
= (char *) start
, *e
= (char *) end
;
4492 for (r
= mmap_regions
; r
; r
= r
->next
)
4494 char *rstart
= (char *) r
;
4495 char *rend
= rstart
+ r
->nbytes_mapped
;
4497 if (/* First byte of range, i.e. START, in this region? */
4498 (s
>= rstart
&& s
< rend
)
4499 /* Last byte of range, i.e. END - 1, in this region? */
4500 || (e
> rstart
&& e
<= rend
)
4501 /* First byte of this region in the range? */
4502 || (rstart
>= s
&& rstart
< e
)
4503 /* Last byte of this region in the range? */
4504 || (rend
> s
&& rend
<= e
))
4512 /* Unmap a region. P is a pointer to the start of the user-araa of
4513 the region. Value is non-zero if successful. */
4516 mmap_free_1 (struct mmap_region
*r
)
4519 r
->next
->prev
= r
->prev
;
4521 r
->prev
->next
= r
->next
;
4523 mmap_regions
= r
->next
;
4525 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4527 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4535 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4536 Value is non-zero if successful. */
4539 mmap_enlarge (struct mmap_region
*r
, int npages
)
4541 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4547 /* Unmap pages at the end of the region. */
4548 nbytes
= - npages
* mmap_page_size
;
4549 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4550 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4553 r
->nbytes_mapped
-= nbytes
;
4557 else if (npages
> 0)
4559 nbytes
= npages
* mmap_page_size
;
4561 /* Try to map additional pages at the end of the region. We
4562 cannot do this if the address range is already occupied by
4563 something else because mmap deletes any previous mapping.
4564 I'm not sure this is worth doing, let's see. */
4565 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4569 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4570 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4571 if (p
== MAP_FAILED
)
4572 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4573 else if (p
!= (POINTER_TYPE
*) region_end
)
4575 /* Kernels are free to choose a different address. In
4576 that case, unmap what we've mapped above; we have
4578 if (munmap (p
, nbytes
) == -1)
4579 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4583 r
->nbytes_mapped
+= nbytes
;
4593 /* Set or reset variables holding references to mapped regions. If
4594 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4595 non-zero, set all variables to the start of the user-areas
4598 This function is called from Fdump_emacs to ensure that the dumped
4599 Emacs doesn't contain references to memory that won't be mapped
4600 when Emacs starts. */
4603 mmap_set_vars (int restore_p
)
4605 struct mmap_region
*r
;
4609 mmap_regions
= mmap_regions_1
;
4610 mmap_fd
= mmap_fd_1
;
4611 for (r
= mmap_regions
; r
; r
= r
->next
)
4612 *r
->var
= MMAP_USER_AREA (r
);
4616 for (r
= mmap_regions
; r
; r
= r
->next
)
4618 mmap_regions_1
= mmap_regions
;
4619 mmap_regions
= NULL
;
4620 mmap_fd_1
= mmap_fd
;
4626 /* Allocate a block of storage large enough to hold NBYTES bytes of
4627 data. A pointer to the data is returned in *VAR. VAR is thus the
4628 address of some variable which will use the data area.
4630 The allocation of 0 bytes is valid.
4632 If we can't allocate the necessary memory, set *VAR to null, and
4635 static POINTER_TYPE
*
4636 mmap_alloc (POINTER_TYPE
**var
, size_t nbytes
)
4643 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4644 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4647 if (p
== MAP_FAILED
)
4649 if (errno
!= ENOMEM
)
4650 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4655 struct mmap_region
*r
= (struct mmap_region
*) p
;
4657 r
->nbytes_specified
= nbytes
;
4658 r
->nbytes_mapped
= map
;
4661 r
->next
= mmap_regions
;
4666 p
= MMAP_USER_AREA (p
);
4673 /* Free a block of relocatable storage whose data is pointed to by
4674 PTR. Store 0 in *PTR to show there's no block allocated. */
4677 mmap_free (POINTER_TYPE
**var
)
4683 mmap_free_1 (MMAP_REGION (*var
));
4689 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4690 resize it to size NBYTES. Change *VAR to reflect the new block,
4691 and return this value. If more memory cannot be allocated, then
4692 leave *VAR unchanged, and return null. */
4694 static POINTER_TYPE
*
4695 mmap_realloc (POINTER_TYPE
**var
, size_t nbytes
)
4697 POINTER_TYPE
*result
;
4702 result
= mmap_alloc (var
, nbytes
);
4703 else if (nbytes
== 0)
4706 result
= mmap_alloc (var
, nbytes
);
4710 struct mmap_region
*r
= MMAP_REGION (*var
);
4711 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4716 POINTER_TYPE
*old_ptr
= *var
;
4718 /* Try to map additional pages at the end of the region.
4719 If that fails, allocate a new region, copy data
4720 from the old region, then free it. */
4721 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4724 r
->nbytes_specified
= nbytes
;
4725 *var
= result
= old_ptr
;
4727 else if (mmap_alloc (var
, nbytes
))
4729 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4730 mmap_free_1 (MMAP_REGION (old_ptr
));
4732 r
= MMAP_REGION (result
);
4733 r
->nbytes_specified
= nbytes
;
4741 else if (room
- nbytes
>= mmap_page_size
)
4743 /* Shrinking by at least a page. Let's give some
4744 memory back to the system.
4746 The extra parens are to make the division happens first,
4747 on positive values, so we know it will round towards
4749 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4751 r
->nbytes_specified
= nbytes
;
4755 /* Leave it alone. */
4757 r
->nbytes_specified
= nbytes
;
4765 #endif /* USE_MMAP_FOR_BUFFERS */
4769 /***********************************************************************
4770 Buffer-text Allocation
4771 ***********************************************************************/
4774 extern POINTER_TYPE
*r_alloc (POINTER_TYPE
**, size_t);
4775 extern POINTER_TYPE
*r_re_alloc (POINTER_TYPE
**, size_t);
4776 extern void r_alloc_free (POINTER_TYPE
**ptr
);
4777 #endif /* REL_ALLOC */
4780 /* Allocate NBYTES bytes for buffer B's text buffer. */
4783 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4788 #if defined USE_MMAP_FOR_BUFFERS
4789 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4790 #elif defined REL_ALLOC
4791 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4793 p
= xmalloc (nbytes
);
4799 memory_full (nbytes
);
4802 b
->text
->beg
= (unsigned char *) p
;
4806 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4810 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4813 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4816 #if defined USE_MMAP_FOR_BUFFERS
4817 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4818 #elif defined REL_ALLOC
4819 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4821 p
= xrealloc (b
->text
->beg
, nbytes
);
4827 memory_full (nbytes
);
4830 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4835 /* Free buffer B's text buffer. */
4838 free_buffer_text (struct buffer
*b
)
4842 #if defined USE_MMAP_FOR_BUFFERS
4843 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4844 #elif defined REL_ALLOC
4845 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4847 xfree (b
->text
->beg
);
4850 BUF_BEG_ADDR (b
) = NULL
;
4856 /***********************************************************************
4858 ***********************************************************************/
4861 init_buffer_once (void)
4865 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4867 /* Make sure all markable slots in buffer_defaults
4868 are initialized reasonably, so mark_buffer won't choke. */
4869 reset_buffer (&buffer_defaults
);
4870 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4871 reset_buffer_local_variables (&buffer_defaults
, 1);
4872 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4873 reset_buffer (&buffer_local_symbols
);
4874 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4875 /* Prevent GC from getting confused. */
4876 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4877 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4878 BUF_INTERVALS (&buffer_defaults
) = 0;
4879 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4880 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, 0);
4881 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4882 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, 0);
4883 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4885 /* Set up the default values of various buffer slots. */
4886 /* Must do these before making the first buffer! */
4888 /* real setup is done in bindings.el */
4889 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4890 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4891 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4892 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4893 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4894 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4895 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4897 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4899 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4900 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4901 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4902 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4903 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4904 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4905 buffer_defaults
.overlays_before
= NULL
;
4906 buffer_defaults
.overlays_after
= NULL
;
4907 buffer_defaults
.overlay_center
= BEG
;
4909 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4910 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4911 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4912 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4913 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4914 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4915 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4916 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4917 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4919 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4920 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4921 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4922 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4923 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4924 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4925 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4926 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4927 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4928 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4929 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4930 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4931 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4932 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4933 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4934 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4935 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4936 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4937 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4938 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4939 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4941 /* Assign the local-flags to the slots that have default values.
4942 The local flag is a bit that is used in the buffer
4943 to say that it has its own local value for the slot.
4944 The local flag bits are in the local_var_flags slot of the buffer. */
4946 /* Nothing can work if this isn't true */
4947 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4949 /* 0 means not a lisp var, -1 means always local, else mask */
4950 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4951 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4952 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4953 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4954 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4955 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4956 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4957 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4958 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4959 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4960 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4961 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4962 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4963 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4964 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4965 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4966 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4967 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4968 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4971 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4972 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4973 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4974 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4975 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4976 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4978 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4980 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4981 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4982 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4983 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4984 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4985 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4986 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
4988 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
4990 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
4992 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
4994 /* Make this one a permanent local. */
4995 buffer_permanent_local_flags
[idx
++] = 1;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5000 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5001 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5002 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5003 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5004 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5005 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5006 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5007 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5008 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5010 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5012 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5014 /* Need more room? */
5015 if (idx
>= MAX_PER_BUFFER_VARS
)
5017 last_per_buffer_idx
= idx
;
5019 Vbuffer_alist
= Qnil
;
5023 QSFundamental
= make_pure_c_string ("Fundamental");
5025 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5026 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5028 Qmode_class
= intern_c_string ("mode-class");
5030 Qprotected_field
= intern_c_string ("protected-field");
5032 Qpermanent_local
= intern_c_string ("permanent-local");
5034 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5035 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5037 /* super-magic invisible buffer */
5038 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5039 Vbuffer_alist
= Qnil
;
5041 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5043 inhibit_modification_hooks
= 0;
5053 #ifdef USE_MMAP_FOR_BUFFERS
5055 /* When using the ralloc implementation based on mmap(2), buffer
5056 text pointers will have been set to null in the dumped Emacs.
5060 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5061 if (b
->text
->beg
== NULL
)
5062 enlarge_buffer_text (b
, 0);
5064 #endif /* USE_MMAP_FOR_BUFFERS */
5066 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5067 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5068 Fset_buffer_multibyte (Qnil
);
5070 pwd
= get_current_dir_name ();
5073 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5075 /* Maybe this should really use some standard subroutine
5076 whose definition is filename syntax dependent. */
5078 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5080 /* Grow buffer to add directory separator and '\0'. */
5081 pwd
= (char *) realloc (pwd
, len
+ 2);
5083 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5084 pwd
[len
] = DIRECTORY_SEP
;
5085 pwd
[len
+ 1] = '\0';
5088 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5089 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5090 /* At this moment, we still don't know how to decode the
5091 directory name. So, we keep the bytes in multibyte form so
5092 that ENCODE_FILE correctly gets the original bytes. */
5093 BVAR (current_buffer
, directory
)
5094 = string_to_multibyte (BVAR (current_buffer
, directory
));
5096 /* Add /: to the front of the name
5097 if it would otherwise be treated as magic. */
5098 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5100 /* If the default dir is just /, TEMP is non-nil
5101 because of the ange-ftp completion handler.
5102 However, it is not necessary to turn / into /:/.
5103 So avoid doing that. */
5104 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5105 BVAR (current_buffer
, directory
)
5106 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5108 temp
= get_minibuffer (0);
5109 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5114 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5115 Object stored in the current buffer. address is the address of the slot
5116 in the buffer that is current now. */
5118 /* TYPE is nil for a general Lisp variable.
5119 An integer specifies a type; then only Lisp values
5120 with that type code are allowed (except that nil is allowed too).
5121 LNAME is the Lisp-level variable name.
5122 VNAME is the name of the buffer slot.
5123 DOC is a dummy where you write the doc string as a comment. */
5124 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5126 static struct Lisp_Buffer_Objfwd bo_fwd; \
5127 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5131 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5132 Lisp_Object
*address
, Lisp_Object type
)
5134 struct Lisp_Symbol
*sym
;
5137 sym
= XSYMBOL (intern (namestring
));
5138 offset
= (char *)address
- (char *)current_buffer
;
5140 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5141 bo_fwd
->offset
= offset
;
5142 bo_fwd
->slottype
= type
;
5143 sym
->declared_special
= 1;
5144 sym
->redirect
= SYMBOL_FORWARDED
;
5146 /* I tried to do the job without a cast, but it seems impossible.
5147 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5148 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5150 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5152 if (PER_BUFFER_IDX (offset
) == 0)
5153 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5154 slot of buffer_local_flags */
5159 /* initialize the buffer routines */
5161 syms_of_buffer (void)
5163 staticpro (&last_overlay_modification_hooks
);
5164 last_overlay_modification_hooks
5165 = Fmake_vector (make_number (10), Qnil
);
5167 staticpro (&Vbuffer_defaults
);
5168 staticpro (&Vbuffer_local_symbols
);
5169 staticpro (&Qfundamental_mode
);
5170 staticpro (&Qmode_class
);
5171 staticpro (&QSFundamental
);
5172 staticpro (&Vbuffer_alist
);
5173 staticpro (&Qprotected_field
);
5174 staticpro (&Qpermanent_local
);
5175 staticpro (&Qkill_buffer_hook
);
5177 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5178 DEFSYM (Qoverlayp
, "overlayp");
5179 DEFSYM (Qevaporate
, "evaporate");
5180 DEFSYM (Qmodification_hooks
, "modification-hooks");
5181 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5182 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5183 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5184 DEFSYM (Qpriority
, "priority");
5185 DEFSYM (Qbefore_string
, "before-string");
5186 DEFSYM (Qafter_string
, "after-string");
5187 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5188 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5189 DEFSYM (Qafter_change_functions
, "after-change-functions");
5190 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5192 Fput (Qprotected_field
, Qerror_conditions
,
5193 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5194 Fput (Qprotected_field
, Qerror_message
,
5195 make_pure_c_string ("Attempt to modify a protected field"));
5197 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5199 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5200 This is the same as (default-value 'mode-line-format). */);
5202 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5204 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5205 This is the same as (default-value 'header-line-format). */);
5207 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5208 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5209 This is the same as (default-value 'cursor-type). */);
5211 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5213 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5214 This is the same as (default-value 'line-spacing). */);
5216 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5217 cursor_in_non_selected_windows
,
5218 doc
: /* Default value of `cursor-in-non-selected-windows'.
5219 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5221 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5223 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5224 This is the same as (default-value 'abbrev-mode). */);
5226 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5228 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5229 This is the same as (default-value 'ctl-arrow). */);
5231 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5232 enable_multibyte_characters
,
5233 doc
: /* Default value of `enable-multibyte-characters' for buffers not overriding it.
5234 This is the same as (default-value 'enable-multibyte-characters). */);
5236 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5237 buffer_file_coding_system
,
5238 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5239 This is the same as (default-value 'buffer-file-coding-system). */);
5241 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5243 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5244 This is the same as (default-value 'truncate-lines). */);
5246 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5248 doc
: /* Default value of `fill-column' for buffers that do not override it.
5249 This is the same as (default-value 'fill-column). */);
5251 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5253 doc
: /* Default value of `left-margin' for buffers that do not override it.
5254 This is the same as (default-value 'left-margin). */);
5256 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5258 doc
: /* Default value of `tab-width' for buffers that do not override it.
5259 This is the same as (default-value 'tab-width). */);
5261 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5263 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5264 This is the same as (default-value 'case-fold-search). */);
5266 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5268 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5269 This is the same as (default-value 'left-margin-width). */);
5271 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5273 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5274 This is the same as (default-value 'right-margin-width). */);
5276 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5278 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5279 This is the same as (default-value 'left-fringe-width). */);
5281 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5283 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5284 This is the same as (default-value 'right-fringe-width). */);
5286 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5287 fringes_outside_margins
,
5288 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5289 This is the same as (default-value 'fringes-outside-margins). */);
5291 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5293 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5294 This is the same as (default-value 'scroll-bar-width). */);
5296 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5297 vertical_scroll_bar_type
,
5298 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5299 This is the same as (default-value 'vertical-scroll-bar). */);
5301 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5302 indicate_empty_lines
,
5303 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5304 This is the same as (default-value 'indicate-empty-lines). */);
5306 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5307 indicate_buffer_boundaries
,
5308 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5309 This is the same as (default-value 'indicate-buffer-boundaries). */);
5311 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5312 fringe_indicator_alist
,
5313 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5314 This is the same as (default-value 'fringe-indicator-alist'). */);
5316 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5317 fringe_cursor_alist
,
5318 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5319 This is the same as (default-value 'fringe-cursor-alist'). */);
5321 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5322 scroll_up_aggressively
,
5323 doc
: /* Default value of `scroll-up-aggressively'.
5324 This value applies in buffers that don't have their own local values.
5325 This is the same as (default-value 'scroll-up-aggressively). */);
5327 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5328 scroll_down_aggressively
,
5329 doc
: /* Default value of `scroll-down-aggressively'.
5330 This value applies in buffers that don't have their own local values.
5331 This is the same as (default-value 'scroll-down-aggressively). */);
5333 DEFVAR_PER_BUFFER ("header-line-format",
5334 &BVAR (current_buffer
, header_line_format
),
5336 doc
: /* Analogous to `mode-line-format', but controls the header line.
5337 The header line appears, optionally, at the top of a window;
5338 the mode line appears at the bottom. */);
5340 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5342 doc
: /* Template for displaying mode line for current buffer.
5343 Each buffer has its own value of this variable.
5344 Value may be nil, a string, a symbol or a list or cons cell.
5345 A value of nil means don't display a mode line.
5346 For a symbol, its value is used (but it is ignored if t or nil).
5347 A string appearing directly as the value of a symbol is processed verbatim
5348 in that the %-constructs below are not recognized.
5349 Note that unless the symbol is marked as a `risky-local-variable', all
5350 properties in any strings, as well as all :eval and :propertize forms
5351 in the value of that symbol will be ignored.
5352 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5353 is used as a mode line element. Be careful--FORM should not load any files,
5354 because that can cause an infinite recursion.
5355 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5356 with the specified properties PROPS applied.
5357 For a list whose car is a symbol, the symbol's value is taken,
5358 and if that is non-nil, the cadr of the list is processed recursively.
5359 Otherwise, the caddr of the list (if there is one) is processed.
5360 For a list whose car is a string or list, each element is processed
5361 recursively and the results are effectively concatenated.
5362 For a list whose car is an integer, the cdr of the list is processed
5363 and padded (if the number is positive) or truncated (if negative)
5364 to the width specified by that number.
5365 A string is printed verbatim in the mode line except for %-constructs:
5366 (%-constructs are allowed when the string is the entire mode-line-format
5367 or when it is found in a cons-cell or a list)
5368 %b -- print buffer name. %f -- print visited file name.
5369 %F -- print frame name.
5370 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5371 %& is like %*, but ignore read-only-ness.
5372 % means buffer is read-only and * means it is modified.
5373 For a modified read-only buffer, %* gives % and %+ gives *.
5374 %s -- print process status. %l -- print the current line number.
5375 %c -- print the current column number (this makes editing slower).
5376 To make the column number update correctly in all cases,
5377 `column-number-mode' must be non-nil.
5378 %i -- print the size of the buffer.
5379 %I -- like %i, but use k, M, G, etc., to abbreviate.
5380 %p -- print percent of buffer above top of window, or Top, Bot or All.
5381 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5382 or print Bottom or All.
5383 %n -- print Narrow if appropriate.
5384 %t -- visited file is text or binary (if OS supports this distinction).
5385 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5386 %Z -- like %z, but including the end-of-line format.
5387 %e -- print error message about full memory.
5388 %@ -- print @ or hyphen. @ means that default-directory is on a
5390 %[ -- print one [ for each recursive editing level. %] similar.
5391 %% -- print %. %- -- print infinitely many dashes.
5392 Decimal digits after the % specify field width to which to pad. */);
5394 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5395 doc
: /* Value of `major-mode' for new buffers. */);
5397 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5398 make_number (Lisp_Symbol
),
5399 doc
: /* Symbol for current buffer's major mode.
5400 The default value (normally `fundamental-mode') affects new buffers.
5401 A value of nil means to use the current buffer's major mode, provided
5402 it is not marked as "special".
5404 When a mode is used by default, `find-file' switches to it before it
5405 reads the contents into the buffer and before it finishes setting up
5406 the buffer. Thus, the mode and its hooks should not expect certain
5407 variables such as `buffer-read-only' and `buffer-file-coding-system'
5410 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5412 doc
: /* Pretty name of current buffer's major mode.
5413 Usually a string, but can use any of the constructs for `mode-line-format',
5415 Format with `format-mode-line' to produce a string value. */);
5417 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5418 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5420 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5421 doc
: /* Non-nil if Abbrev mode is enabled.
5422 Use the command `abbrev-mode' to change this variable. */);
5424 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5426 doc
: /* Non-nil if searches and matches should ignore case. */);
5428 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5429 make_number (LISP_INT_TAG
),
5430 doc
: /* Column beyond which automatic line-wrapping should happen.
5431 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5433 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5434 make_number (LISP_INT_TAG
),
5435 doc
: /* Column for the default `indent-line-function' to indent to.
5436 Linefeed indents to this column in Fundamental mode. */);
5438 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5439 make_number (LISP_INT_TAG
),
5440 doc
: /* Distance between tab stops (for display of tab characters), in columns.
5441 This should be an integer greater than zero. */);
5443 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5444 doc
: /* Non-nil means display control chars with uparrow.
5445 A value of nil means use backslash and octal digits.
5446 This variable does not apply to characters whose display is specified
5447 in the current display table (if there is one). */);
5449 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5450 &BVAR (current_buffer
, enable_multibyte_characters
),
5452 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5453 Otherwise they are regarded as unibyte. This affects the display,
5454 file I/O and the behavior of various editing commands.
5456 This variable is buffer-local but you cannot set it directly;
5457 use the function `set-buffer-multibyte' to change a buffer's representation.
5458 See also Info node `(elisp)Text Representations'. */);
5459 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5461 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5462 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5463 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5464 This variable applies to saving the buffer, and also to `write-region'
5465 and other functions that use `write-region'.
5466 It does not apply to sending output to subprocesses, however.
5468 If this is nil, the buffer is saved without any code conversion
5469 unless some coding system is specified in `file-coding-system-alist'
5470 for the buffer file.
5472 If the text to be saved cannot be encoded as specified by this variable,
5473 an alternative encoding is selected by `select-safe-coding-system', which see.
5475 The variable `coding-system-for-write', if non-nil, overrides this variable.
5477 This variable is never applied to a way of decoding a file while reading it. */);
5479 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5480 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5481 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5483 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5484 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5485 doc
: /* If non-nil, forces directionality of text paragraphs in the buffer.
5487 If this is nil (the default), the direction of each paragraph is
5488 determined by the first strong directional character of its text.
5489 The values of `right-to-left' and `left-to-right' override that.
5490 Any other value is treated as nil.
5492 This variable has no effect unless the buffer's value of
5493 \`bidi-display-reordering' is non-nil. */);
5495 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5496 doc
: /* Non-nil means do not display continuation lines.
5497 Instead, give each line of text just one screen line.
5499 Note that this is overridden by the variable
5500 `truncate-partial-width-windows' if that variable is non-nil
5501 and this buffer is not full-frame width.
5503 Minibuffers set this variable to nil. */);
5505 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5506 doc
: /* Non-nil means to use word-wrapping for continuation lines.
5507 When word-wrapping is on, continuation lines are wrapped at the space
5508 or tab character nearest to the right window edge.
5509 If nil, continuation lines are wrapped at the right screen edge.
5511 This variable has no effect if long lines are truncated (see
5512 `truncate-lines' and `truncate-partial-width-windows'). If you use
5513 word-wrapping, you might want to reduce the value of
5514 `truncate-partial-width-windows', since wrapping can make text readable
5515 in narrower windows. */);
5517 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5518 make_number (Lisp_String
),
5519 doc
: /* Name of default directory of current buffer. Should end with slash.
5520 To interactively change the default directory, use command `cd'. */);
5522 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5524 doc
: /* Function called (if non-nil) to perform auto-fill.
5525 It is called after self-inserting any character specified in
5526 the `auto-fill-chars' table.
5527 NOTE: This variable is not a hook;
5528 its value may not be a list of functions. */);
5530 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5531 make_number (Lisp_String
),
5532 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5534 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5535 make_number (Lisp_String
),
5536 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5537 The truename of a file is calculated by `file-truename'
5538 and then abbreviated with `abbreviate-file-name'. */);
5540 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5541 &BVAR (current_buffer
, auto_save_file_name
),
5542 make_number (Lisp_String
),
5543 doc
: /* Name of file for auto-saving current buffer.
5544 If it is nil, that means don't auto-save this buffer. */);
5546 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5547 doc
: /* Non-nil if this buffer is read-only. */);
5549 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5550 doc
: /* Non-nil if this buffer's file has been backed up.
5551 Backing up is done before the first time the file is saved. */);
5553 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5554 make_number (LISP_INT_TAG
),
5555 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5557 -1 means auto-saving turned off until next real save.
5559 If you set this to -2, that means don't turn off auto-saving in this buffer
5560 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5561 you probably should set this to -2 in that buffer. */);
5563 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5565 doc
: /* Non-nil enables selective display.
5566 An integer N as value means display only lines
5567 that start with less than N columns of space.
5568 A value of t means that the character ^M makes itself and
5569 all the rest of the line invisible; also, when saving the buffer
5570 in a file, save the ^M as a newline. */);
5573 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5574 &BVAR (current_buffer
, selective_display_ellipses
),
5576 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5579 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5580 doc
: /* Non-nil if self-insertion should replace existing text.
5581 The value should be one of `overwrite-mode-textual',
5582 `overwrite-mode-binary', or nil.
5583 If it is `overwrite-mode-textual', self-insertion still
5584 inserts at the end of a line, and inserts when point is before a tab,
5585 until the tab is filled in.
5586 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5588 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5590 doc
: /* Display table that controls display of the contents of current buffer.
5592 If this variable is nil, the value of `standard-display-table' is used.
5593 Each window can have its own, overriding display table, see
5594 `set-window-display-table' and `window-display-table'.
5596 The display table is a char-table created with `make-display-table'.
5597 A char-table is an array indexed by character codes. Normal array
5598 primitives `aref' and `aset' can be used to access elements of a char-table.
5600 Each of the char-table elements control how to display the corresponding
5601 text character: the element at index C in the table says how to display
5602 the character whose code is C. Each element should be a vector of
5603 characters or nil. The value nil means display the character in the
5604 default fashion; otherwise, the characters from the vector are delivered
5605 to the screen instead of the original character.
5607 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5608 to display a capital Y instead of each X character.
5610 In addition, a char-table has six extra slots to control the display of:
5612 the end of a truncated screen line (extra-slot 0, a single character);
5613 the end of a continued line (extra-slot 1, a single character);
5614 the escape character used to display character codes in octal
5615 (extra-slot 2, a single character);
5616 the character used as an arrow for control characters (extra-slot 3,
5617 a single character);
5618 the decoration indicating the presence of invisible lines (extra-slot 4,
5619 a vector of characters);
5620 the character used to draw the border between side-by-side windows
5621 (extra-slot 5, a single character).
5623 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5625 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5627 doc
: /* Width of left marginal area for display of a buffer.
5628 A value of nil means no marginal area. */);
5630 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5632 doc
: /* Width of right marginal area for display of a buffer.
5633 A value of nil means no marginal area. */);
5635 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5637 doc
: /* Width of this buffer's left fringe (in pixels).
5638 A value of 0 means no left fringe is shown in this buffer's window.
5639 A value of nil means to use the left fringe width from the window's frame. */);
5641 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5643 doc
: /* Width of this buffer's right fringe (in pixels).
5644 A value of 0 means no right fringe is shown in this buffer's window.
5645 A value of nil means to use the right fringe width from the window's frame. */);
5647 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5649 doc
: /* Non-nil means to display fringes outside display margins.
5650 A value of nil means to display fringes between margins and buffer text. */);
5652 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5654 doc
: /* Width of this buffer's scroll bars in pixels.
5655 A value of nil means to use the scroll bar width from the window's frame. */);
5657 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5659 doc
: /* Position of this buffer's vertical scroll bar.
5660 The value takes effect whenever you tell a window to display this buffer;
5661 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5663 A value of `left' or `right' means put the vertical scroll bar at that side
5664 of the window; a value of nil means don't show any vertical scroll bars.
5665 A value of t (the default) means do whatever the window's frame specifies. */);
5667 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5668 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5669 doc
: /* Visually indicate empty lines after the buffer end.
5670 If non-nil, a bitmap is displayed in the left fringe of a window on
5671 window-systems. */);
5673 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5674 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5675 doc
: /* Visually indicate buffer boundaries and scrolling.
5676 If non-nil, the first and last line of the buffer are marked in the fringe
5677 of a window on window-systems with angle bitmaps, or if the window can be
5678 scrolled, the top and bottom line of the window are marked with up and down
5681 If value is a symbol `left' or `right', both angle and arrow bitmaps
5682 are displayed in the left or right fringe, resp. Any other value
5683 that doesn't look like an alist means display the angle bitmaps in
5684 the left fringe but no arrows.
5686 You can exercise more precise control by using an alist as the
5687 value. Each alist element (INDICATOR . POSITION) specifies
5688 where to show one of the indicators. INDICATOR is one of `top',
5689 `bottom', `up', `down', or t, which specifies the default position,
5690 and POSITION is one of `left', `right', or nil, meaning do not show
5693 For example, ((top . left) (t . right)) places the top angle bitmap in
5694 left fringe, the bottom angle bitmap in right fringe, and both arrow
5695 bitmaps in right fringe. To show just the angle bitmaps in the left
5696 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5698 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5699 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5700 doc
: /* Mapping from logical to physical fringe indicator bitmaps.
5701 The value is an alist where each element (INDICATOR . BITMAPS)
5702 specifies the fringe bitmaps used to display a specific logical
5705 INDICATOR specifies the logical indicator type which is one of the
5706 following symbols: `truncation' , `continuation', `overlay-arrow',
5707 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5709 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5710 the actual bitmap shown in the left or right fringe for the logical
5711 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5712 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5713 are used only for the `bottom' and `top-bottom' indicators when the
5714 last (only) line has no final newline. BITMAPS may also be a single
5715 symbol which is used in both left and right fringes. */);
5717 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5718 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5719 doc
: /* Mapping from logical to physical fringe cursor bitmaps.
5720 The value is an alist where each element (CURSOR . BITMAP)
5721 specifies the fringe bitmaps used to display a specific logical
5722 cursor type in the fringe.
5724 CURSOR specifies the logical cursor type which is one of the following
5725 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5726 one is used to show a hollow cursor on narrow lines display lines
5727 where the normal hollow cursor will not fit.
5729 BITMAP is the corresponding fringe bitmap shown for the logical
5732 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5733 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5734 doc
: /* How far to scroll windows upward.
5735 If you move point off the bottom, the window scrolls automatically.
5736 This variable controls how far it scrolls. The value nil, the default,
5737 means scroll to center point. A fraction means scroll to put point
5738 that fraction of the window's height from the bottom of the window.
5739 When the value is 0.0, point goes at the bottom line, which in the
5740 simple case that you moved off with C-f means scrolling just one line.
5741 1.0 means point goes at the top, so that in that simple case, the
5742 window scrolls by a full window height. Meaningful values are
5743 between 0.0 and 1.0, inclusive. */);
5745 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5746 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5747 doc
: /* How far to scroll windows downward.
5748 If you move point off the top, the window scrolls automatically.
5749 This variable controls how far it scrolls. The value nil, the default,
5750 means scroll to center point. A fraction means scroll to put point
5751 that fraction of the window's height from the top of the window.
5752 When the value is 0.0, point goes at the top line, which in the
5753 simple case that you moved off with C-b means scrolling just one line.
5754 1.0 means point goes at the bottom, so that in that simple case, the
5755 window scrolls by a full window height. Meaningful values are
5756 between 0.0 and 1.0, inclusive. */);
5758 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5762 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5763 doc
: /* List of functions to call before each text change.
5764 Two arguments are passed to each function: the positions of
5765 the beginning and end of the range of old text to be changed.
5766 \(For an insertion, the beginning and end are at the same place.)
5767 No information is given about the length of the text after the change.
5769 Buffer changes made while executing the `before-change-functions'
5770 don't call any before-change or after-change functions.
5771 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5773 If an unhandled error happens in running these functions,
5774 the variable's value remains nil. That prevents the error
5775 from happening repeatedly and making Emacs nonfunctional. */);
5776 Vbefore_change_functions
= Qnil
;
5778 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5779 doc
: /* List of functions to call after each text change.
5780 Three arguments are passed to each function: the positions of
5781 the beginning and end of the range of changed text,
5782 and the length in bytes of the pre-change text replaced by that range.
5783 \(For an insertion, the pre-change length is zero;
5784 for a deletion, that length is the number of bytes deleted,
5785 and the post-change beginning and end are at the same place.)
5787 Buffer changes made while executing the `after-change-functions'
5788 don't call any before-change or after-change functions.
5789 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5791 If an unhandled error happens in running these functions,
5792 the variable's value remains nil. That prevents the error
5793 from happening repeatedly and making Emacs nonfunctional. */);
5794 Vafter_change_functions
= Qnil
;
5796 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5797 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5798 The functions are run using the `run-hooks' function. */);
5799 Vfirst_change_hook
= Qnil
;
5801 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5802 doc
: /* List of undo entries in current buffer.
5803 Recent changes come first; older changes follow newer.
5805 An entry (BEG . END) represents an insertion which begins at
5806 position BEG and ends at position END.
5808 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5809 from (abs POSITION). If POSITION is positive, point was at the front
5810 of the text being deleted; if negative, point was at the end.
5812 An entry (t HIGH . LOW) indicates that the buffer previously had
5813 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5814 of the visited file's modification time, as of that time. If the
5815 modification time of the most recent save is different, this entry is
5818 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5819 was modified between BEG and END. PROPERTY is the property name,
5820 and VALUE is the old value.
5822 An entry (apply FUN-NAME . ARGS) means undo the change with
5823 \(apply FUN-NAME ARGS).
5825 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5826 in the active region. BEG and END is the range affected by this entry
5827 and DELTA is the number of bytes added or deleted in that range by
5830 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5831 was adjusted in position by the offset DISTANCE (an integer).
5833 An entry of the form POSITION indicates that point was at the buffer
5834 location given by the integer. Undoing an entry of this form places
5837 Entries with value `nil' mark undo boundaries. The undo command treats
5838 the changes between two undo boundaries as a single step to be undone.
5840 If the value of the variable is t, undo information is not recorded. */);
5842 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5843 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5845 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5846 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5848 Normally, the line-motion functions work by scanning the buffer for
5849 newlines. Columnar operations (like `move-to-column' and
5850 `compute-motion') also work by scanning the buffer, summing character
5851 widths as they go. This works well for ordinary text, but if the
5852 buffer's lines are very long (say, more than 500 characters), these
5853 motion functions will take longer to execute. Emacs may also take
5854 longer to update the display.
5856 If `cache-long-line-scans' is non-nil, these motion functions cache the
5857 results of their scans, and consult the cache to avoid rescanning
5858 regions of the buffer until the text is modified. The caches are most
5859 beneficial when they prevent the most searching---that is, when the
5860 buffer contains long lines and large regions of characters with the
5861 same, fixed screen width.
5863 When `cache-long-line-scans' is non-nil, processing short lines will
5864 become slightly slower (because of the overhead of consulting the
5865 cache), and the caches will use memory roughly proportional to the
5866 number of newlines and characters whose screen width varies.
5868 The caches require no explicit maintenance; their accuracy is
5869 maintained internally by the Emacs primitives. Enabling or disabling
5870 the cache should not affect the behavior of any of the motion
5871 functions; it should only affect their performance. */);
5873 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5874 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5876 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5877 doc
: /* List of formats to use when saving this buffer.
5878 Formats are defined by `format-alist'. This variable is
5879 set when a file is visited. */);
5881 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5882 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5883 doc
: /* Format in which to write auto-save files.
5884 Should be a list of symbols naming formats that are defined in `format-alist'.
5885 If it is t, which is the default, auto-save files are written in the
5886 same format as a regular save would use. */);
5888 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5889 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5890 doc
: /* Invisibility spec of this buffer.
5891 The default is t, which means that text is invisible
5892 if it has a non-nil `invisible' property.
5893 If the value is a list, a text character is invisible if its `invisible'
5894 property is an element in that list (or is a list with members in common).
5895 If an element is a cons cell of the form (PROP . ELLIPSIS),
5896 then characters with property value PROP are invisible,
5897 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5899 DEFVAR_PER_BUFFER ("buffer-display-count",
5900 &BVAR (current_buffer
, display_count
), Qnil
,
5901 doc
: /* A number incremented each time this buffer is displayed in a window.
5902 The function `set-window-buffer' increments it. */);
5904 DEFVAR_PER_BUFFER ("buffer-display-time",
5905 &BVAR (current_buffer
, display_time
), Qnil
,
5906 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5907 The function `set-window-buffer' updates this variable
5908 to the value obtained by calling `current-time'.
5909 If the buffer has never been shown in a window, the value is nil. */);
5911 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5912 doc
: /* Non-nil if Transient Mark mode is enabled.
5913 See the command `transient-mark-mode' for a description of this minor mode.
5915 Non-nil also enables highlighting of the region whenever the mark is active.
5916 The variable `highlight-nonselected-windows' controls whether to highlight
5917 all windows or just the selected window.
5919 Lisp programs may give this variable certain special values:
5921 - A value of `lambda' enables Transient Mark mode temporarily.
5922 It is disabled again after any subsequent action that would
5923 normally deactivate the mark (e.g. buffer modification).
5925 - A value of (only . OLDVAL) enables Transient Mark mode
5926 temporarily. After any subsequent point motion command that is
5927 not shift-translated, or any other action that would normally
5928 deactivate the mark (e.g. buffer modification), the value of
5929 `transient-mark-mode' is set to OLDVAL. */);
5930 Vtransient_mark_mode
= Qnil
;
5932 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5933 doc
: /* Non-nil means disregard read-only status of buffers or characters.
5934 If the value is t, disregard `buffer-read-only' and all `read-only'
5935 text properties. If the value is a list, disregard `buffer-read-only'
5936 and disregard a `read-only' text property if the property value
5937 is a member of the list. */);
5938 Vinhibit_read_only
= Qnil
;
5940 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5941 doc
: /* Cursor to use when this buffer is in the selected window.
5942 Values are interpreted as follows:
5944 t use the cursor specified for the frame
5945 nil don't display a cursor
5946 box display a filled box cursor
5947 hollow display a hollow box cursor
5948 bar display a vertical bar cursor with default width
5949 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5950 hbar display a horizontal bar cursor with default height
5951 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5952 ANYTHING ELSE display a hollow box cursor
5954 When the buffer is displayed in a non-selected window, the
5955 cursor's appearance is instead controlled by the variable
5956 `cursor-in-non-selected-windows'. */);
5958 DEFVAR_PER_BUFFER ("line-spacing",
5959 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5960 doc
: /* Additional space to put between lines when displaying a buffer.
5961 The space is measured in pixels, and put below lines on graphic displays,
5962 see `display-graphic-p'.
5963 If value is a floating point number, it specifies the spacing relative
5964 to the default frame line height. A value of nil means add no extra space. */);
5966 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5967 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5968 doc
: /* Non-nil means show a cursor in non-selected windows.
5969 If nil, only shows a cursor in the selected window.
5970 If t, displays a cursor related to the usual cursor type
5971 \(a solid box becomes hollow, a bar becomes a narrower bar).
5972 You can also specify the cursor type as in the `cursor-type' variable.
5973 Use Custom to set this variable and update the display." */);
5975 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5976 doc
: /* List of functions called with no args to query before killing a buffer.
5977 The buffer being killed will be current while the functions are running.
5978 If any of them returns nil, the buffer is not killed. */);
5979 Vkill_buffer_query_functions
= Qnil
;
5981 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
5982 doc
: /* Normal hook run before changing the major mode of a buffer.
5983 The function `kill-all-local-variables' runs this before doing anything else. */);
5984 Vchange_major_mode_hook
= Qnil
;
5985 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
5987 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
5988 doc
: /* Hook run when the buffer list changes.
5989 Functions running this hook are `get-buffer-create',
5990 `make-indirect-buffer', `rename-buffer', `kill-buffer',
5991 and `bury-buffer-internal'. */);
5992 Vbuffer_list_update_hook
= Qnil
;
5993 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
5995 defsubr (&Sbuffer_live_p
);
5996 defsubr (&Sbuffer_list
);
5997 defsubr (&Sget_buffer
);
5998 defsubr (&Sget_file_buffer
);
5999 defsubr (&Sget_buffer_create
);
6000 defsubr (&Smake_indirect_buffer
);
6001 defsubr (&Sgenerate_new_buffer_name
);
6002 defsubr (&Sbuffer_name
);
6003 /*defsubr (&Sbuffer_number);*/
6004 defsubr (&Sbuffer_file_name
);
6005 defsubr (&Sbuffer_base_buffer
);
6006 defsubr (&Sbuffer_local_value
);
6007 defsubr (&Sbuffer_local_variables
);
6008 defsubr (&Sbuffer_modified_p
);
6009 defsubr (&Sset_buffer_modified_p
);
6010 defsubr (&Sbuffer_modified_tick
);
6011 defsubr (&Sbuffer_chars_modified_tick
);
6012 defsubr (&Srename_buffer
);
6013 defsubr (&Sother_buffer
);
6014 defsubr (&Sbuffer_enable_undo
);
6015 defsubr (&Skill_buffer
);
6016 defsubr (&Sbury_buffer_internal
);
6017 defsubr (&Sset_buffer_major_mode
);
6018 defsubr (&Scurrent_buffer
);
6019 defsubr (&Sset_buffer
);
6020 defsubr (&Sbarf_if_buffer_read_only
);
6021 defsubr (&Serase_buffer
);
6022 defsubr (&Sbuffer_swap_text
);
6023 defsubr (&Sset_buffer_multibyte
);
6024 defsubr (&Skill_all_local_variables
);
6026 defsubr (&Soverlayp
);
6027 defsubr (&Smake_overlay
);
6028 defsubr (&Sdelete_overlay
);
6029 defsubr (&Smove_overlay
);
6030 defsubr (&Soverlay_start
);
6031 defsubr (&Soverlay_end
);
6032 defsubr (&Soverlay_buffer
);
6033 defsubr (&Soverlay_properties
);
6034 defsubr (&Soverlays_at
);
6035 defsubr (&Soverlays_in
);
6036 defsubr (&Snext_overlay_change
);
6037 defsubr (&Sprevious_overlay_change
);
6038 defsubr (&Soverlay_recenter
);
6039 defsubr (&Soverlay_lists
);
6040 defsubr (&Soverlay_get
);
6041 defsubr (&Soverlay_put
);
6042 defsubr (&Srestore_buffer_modified_p
);
6046 keys_of_buffer (void)
6048 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6049 initial_define_key (control_x_map
, 'k', "kill-buffer");
6051 /* This must not be in syms_of_buffer, because Qdisabled is not
6052 initialized when that function gets called. */
6053 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);