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
;
396 /* Put this in the alist of all live buffers. */
397 XSETBUFFER (buffer
, b
);
398 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
399 /* And run buffer-list-update-hook. */
400 if (!NILP (Vrun_hooks
))
401 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
407 /* Return a list of overlays which is a copy of the overlay list
408 LIST, but for buffer B. */
410 static struct Lisp_Overlay
*
411 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
414 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
416 XSETBUFFER (buffer
, b
);
418 for (; list
; list
= list
->next
)
420 Lisp_Object overlay
, start
, end
, old_overlay
;
423 XSETMISC (old_overlay
, list
);
424 charpos
= marker_position (OVERLAY_START (old_overlay
));
425 start
= Fmake_marker ();
426 Fset_marker (start
, make_number (charpos
), buffer
);
427 XMARKER (start
)->insertion_type
428 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
430 charpos
= marker_position (OVERLAY_END (old_overlay
));
431 end
= Fmake_marker ();
432 Fset_marker (end
, make_number (charpos
), buffer
);
433 XMARKER (end
)->insertion_type
434 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
436 overlay
= allocate_misc ();
437 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
438 OVERLAY_START (overlay
) = start
;
439 OVERLAY_END (overlay
) = end
;
440 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
441 XOVERLAY (overlay
)->next
= NULL
;
444 tail
= tail
->next
= XOVERLAY (overlay
);
446 result
= tail
= XOVERLAY (overlay
);
453 /* Clone per-buffer values of buffer FROM.
455 Buffer TO gets the same per-buffer values as FROM, with the
456 following exceptions: (1) TO's name is left untouched, (2) markers
457 are copied and made to refer to TO, and (3) overlay lists are
461 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
463 Lisp_Object to_buffer
;
466 XSETBUFFER (to_buffer
, to
);
468 /* buffer-local Lisp variables start at `undo_list',
469 tho only the ones from `name' on are GC'd normally. */
470 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
471 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
472 offset
+= sizeof (Lisp_Object
))
476 /* Don't touch the `name' which should be unique for every buffer. */
477 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
480 obj
= PER_BUFFER_VALUE (from
, offset
);
481 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
483 struct Lisp_Marker
*m
= XMARKER (obj
);
484 obj
= Fmake_marker ();
485 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
486 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
489 PER_BUFFER_VALUE (to
, offset
) = obj
;
492 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
494 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
495 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
497 /* Get (a copy of) the alist of Lisp-level local variables of FROM
498 and install that in TO. */
499 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
503 /* If buffer B has markers to record PT, BEGV and ZV when it is not
504 current, update these markers. */
507 record_buffer_markers (struct buffer
*b
)
509 if (! NILP (BVAR (b
, pt_marker
)))
513 eassert (!NILP (BVAR (b
, begv_marker
)));
514 eassert (!NILP (BVAR (b
, zv_marker
)));
516 XSETBUFFER (buffer
, b
);
517 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
518 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
519 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
524 /* If buffer B has markers to record PT, BEGV and ZV when it is not
525 current, fetch these values into B->begv etc. */
528 fetch_buffer_markers (struct buffer
*b
)
530 if (! NILP (BVAR (b
, pt_marker
)))
534 eassert (!NILP (BVAR (b
, begv_marker
)));
535 eassert (!NILP (BVAR (b
, zv_marker
)));
537 m
= BVAR (b
, pt_marker
);
538 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
540 m
= BVAR (b
, begv_marker
);
541 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
543 m
= BVAR (b
, zv_marker
);
544 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
549 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
551 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
552 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
553 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
554 NAME should be a string which is not the name of an existing buffer.
555 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
556 such as major and minor modes, in the indirect buffer.
557 CLONE nil means the indirect buffer's state is reset to default values. */)
558 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
560 Lisp_Object buf
, tem
;
564 buf
= Fget_buffer (name
);
566 error ("Buffer name `%s' is in use", SDATA (name
));
569 base_buffer
= Fget_buffer (base_buffer
);
570 if (NILP (base_buffer
))
571 error ("No such buffer: `%s'", SDATA (tem
));
572 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
573 error ("Base buffer has been killed");
575 if (SCHARS (name
) == 0)
576 error ("Empty string for buffer name is not allowed");
578 b
= allocate_buffer ();
580 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
581 ? XBUFFER (base_buffer
)->base_buffer
582 : XBUFFER (base_buffer
));
584 /* Use the base buffer's text object. */
585 b
->text
= b
->base_buffer
->text
;
587 b
->pt
= b
->base_buffer
->pt
;
588 b
->begv
= b
->base_buffer
->begv
;
589 b
->zv
= b
->base_buffer
->zv
;
590 b
->pt_byte
= b
->base_buffer
->pt_byte
;
591 b
->begv_byte
= b
->base_buffer
->begv_byte
;
592 b
->zv_byte
= b
->base_buffer
->zv_byte
;
594 b
->newline_cache
= 0;
595 b
->width_run_cache
= 0;
596 BVAR (b
, width_table
) = Qnil
;
598 /* Put this on the chain of all buffers including killed ones. */
599 b
->header
.next
.buffer
= all_buffers
;
602 name
= Fcopy_sequence (name
);
603 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
604 BVAR (b
, name
) = name
;
607 reset_buffer_local_variables (b
, 1);
609 /* Put this in the alist of all live buffers. */
611 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
613 BVAR (b
, mark
) = Fmake_marker ();
615 /* The multibyte status belongs to the base buffer. */
616 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
618 /* Make sure the base buffer has markers for its narrowing. */
619 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
621 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
622 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
624 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
625 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
627 b
->base_buffer
->pt_byte
);
629 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
630 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
631 b
->base_buffer
->begv
,
632 b
->base_buffer
->begv_byte
);
634 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
635 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
637 b
->base_buffer
->zv_byte
);
638 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
643 /* Give the indirect buffer markers for its narrowing. */
644 BVAR (b
, pt_marker
) = Fmake_marker ();
645 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
646 BVAR (b
, begv_marker
) = Fmake_marker ();
647 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
648 BVAR (b
, zv_marker
) = Fmake_marker ();
649 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
650 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
654 struct buffer
*old_b
= current_buffer
;
656 clone_per_buffer_values (b
->base_buffer
, b
);
657 BVAR (b
, filename
) = Qnil
;
658 BVAR (b
, file_truename
) = Qnil
;
659 BVAR (b
, display_count
) = make_number (0);
660 BVAR (b
, backed_up
) = Qnil
;
661 BVAR (b
, auto_save_file_name
) = Qnil
;
662 set_buffer_internal_1 (b
);
663 Fset (intern ("buffer-save-without-query"), Qnil
);
664 Fset (intern ("buffer-file-number"), Qnil
);
665 Fset (intern ("buffer-stale-function"), Qnil
);
666 set_buffer_internal_1 (old_b
);
669 /* Run buffer-list-update-hook. */
670 if (!NILP (Vrun_hooks
))
671 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
677 delete_all_overlays (struct buffer
*b
)
681 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
682 have to empty the list, otherwise we end up with overlays that
683 think they belong to this buffer while the buffer doesn't know about
685 while (b
->overlays_before
)
687 XSETMISC (overlay
, b
->overlays_before
);
688 Fdelete_overlay (overlay
);
690 while (b
->overlays_after
)
692 XSETMISC (overlay
, b
->overlays_after
);
693 Fdelete_overlay (overlay
);
695 eassert (b
->overlays_before
== NULL
);
696 eassert (b
->overlays_after
== NULL
);
699 /* Reinitialize everything about a buffer except its name and contents
701 If called on an already-initialized buffer, the list of overlays
702 should be deleted before calling this function, otherwise we end up
703 with overlays that claim to belong to the buffer but the buffer
704 claims it doesn't belong to it. */
707 reset_buffer (register struct buffer
*b
)
709 BVAR (b
, filename
) = Qnil
;
710 BVAR (b
, file_truename
) = Qnil
;
711 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
713 b
->modtime_size
= -1;
714 XSETFASTINT (BVAR (b
, save_length
), 0);
715 b
->last_window_start
= 1;
716 /* It is more conservative to start out "changed" than "unchanged". */
718 b
->prevent_redisplay_optimizations_p
= 1;
719 BVAR (b
, backed_up
) = Qnil
;
720 BUF_AUTOSAVE_MODIFF (b
) = 0;
721 b
->auto_save_failure_time
= 0;
722 BVAR (b
, auto_save_file_name
) = Qnil
;
723 BVAR (b
, read_only
) = Qnil
;
724 b
->overlays_before
= NULL
;
725 b
->overlays_after
= NULL
;
726 b
->overlay_center
= BEG
;
727 BVAR (b
, mark_active
) = Qnil
;
728 BVAR (b
, point_before_scroll
) = Qnil
;
729 BVAR (b
, file_format
) = Qnil
;
730 BVAR (b
, auto_save_file_format
) = Qt
;
731 BVAR (b
, last_selected_window
) = Qnil
;
732 XSETINT (BVAR (b
, display_count
), 0);
733 BVAR (b
, display_time
) = Qnil
;
734 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
735 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
736 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
738 b
->display_error_modiff
= 0;
741 /* Reset buffer B's local variables info.
742 Don't use this on a buffer that has already been in use;
743 it does not treat permanent locals consistently.
744 Instead, use Fkill_all_local_variables.
746 If PERMANENT_TOO is 1, then we reset permanent
747 buffer-local variables. If PERMANENT_TOO is 0,
748 we preserve those. */
751 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
756 /* Reset the major mode to Fundamental, together with all the
757 things that depend on the major mode.
758 default-major-mode is handled at a higher level.
759 We ignore it here. */
760 BVAR (b
, major_mode
) = Qfundamental_mode
;
761 BVAR (b
, keymap
) = Qnil
;
762 BVAR (b
, mode_name
) = QSFundamental
;
763 BVAR (b
, minor_modes
) = Qnil
;
765 /* If the standard case table has been altered and invalidated,
766 fix up its insides first. */
767 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
768 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
769 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
770 Fset_standard_case_table (Vascii_downcase_table
);
772 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
773 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
774 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
775 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
776 BVAR (b
, invisibility_spec
) = Qt
;
778 /* Reset all (or most) per-buffer variables to their defaults. */
780 BVAR (b
, local_var_alist
) = Qnil
;
783 Lisp_Object tmp
, prop
, last
= Qnil
;
784 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
785 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
787 /* If permanent-local, keep it. */
789 if (EQ (prop
, Qpermanent_local_hook
))
791 /* This is a partially permanent hook variable.
792 Preserve only the elements that want to be preserved. */
793 Lisp_Object list
, newlist
;
794 list
= XCDR (XCAR (tmp
));
798 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
800 Lisp_Object elt
= XCAR (list
);
801 /* Preserve element ELT if it's t,
802 if it is a function with a `permanent-local-hook' property,
803 or if it's not a symbol. */
806 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
807 newlist
= Fcons (elt
, newlist
);
809 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
812 /* Delete this local variable. */
813 else if (NILP (last
))
814 BVAR (b
, local_var_alist
) = XCDR (tmp
);
816 XSETCDR (last
, XCDR (tmp
));
819 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
820 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
821 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
823 /* For each slot that has a default value,
824 copy that into the slot. */
826 /* buffer-local Lisp variables start at `undo_list',
827 tho only the ones from `name' on are GC'd normally. */
828 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
829 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
830 offset
+= sizeof (Lisp_Object
))
832 int idx
= PER_BUFFER_IDX (offset
);
835 || buffer_permanent_local_flags
[idx
] == 0)))
836 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
840 /* We split this away from generate-new-buffer, because rename-buffer
841 and set-visited-file-name ought to be able to use this to really
842 rename the buffer properly. */
844 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
845 Sgenerate_new_buffer_name
, 1, 2, 0,
846 doc
: /* Return a string that is the name of no existing buffer based on NAME.
847 If there is no live buffer named NAME, then return NAME.
848 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
849 \(starting at 2) until an unused name is found, and then return that name.
850 Optional second argument IGNORE specifies a name that is okay to use (if
851 it is in the sequence to be tried) even if a buffer with that name exists. */)
852 (register Lisp_Object name
, Lisp_Object ignore
)
854 register Lisp_Object gentemp
, tem
;
856 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
860 tem
= Fstring_equal (name
, ignore
);
863 tem
= Fget_buffer (name
);
870 sprintf (number
, "<%"pD
"d>", ++count
);
871 gentemp
= concat2 (name
, build_string (number
));
872 tem
= Fstring_equal (gentemp
, ignore
);
875 tem
= Fget_buffer (gentemp
);
882 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
883 doc
: /* Return the name of BUFFER, as a string.
884 BUFFER defaults to the current buffer.
885 Return nil if BUFFER has been killed. */)
886 (register Lisp_Object buffer
)
889 return BVAR (current_buffer
, name
);
890 CHECK_BUFFER (buffer
);
891 return BVAR (XBUFFER (buffer
), name
);
894 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
895 doc
: /* Return name of file BUFFER is visiting, or nil if none.
896 No argument or nil as argument means use the current buffer. */)
897 (register Lisp_Object buffer
)
900 return BVAR (current_buffer
, filename
);
901 CHECK_BUFFER (buffer
);
902 return BVAR (XBUFFER (buffer
), filename
);
905 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
907 doc
: /* Return the base buffer of indirect buffer BUFFER.
908 If BUFFER is not indirect, return nil.
909 BUFFER defaults to the current buffer. */)
910 (register Lisp_Object buffer
)
913 Lisp_Object base_buffer
;
916 base
= current_buffer
->base_buffer
;
919 CHECK_BUFFER (buffer
);
920 base
= XBUFFER (buffer
)->base_buffer
;
925 XSETBUFFER (base_buffer
, base
);
929 DEFUN ("buffer-local-value", Fbuffer_local_value
,
930 Sbuffer_local_value
, 2, 2, 0,
931 doc
: /* Return the value of VARIABLE in BUFFER.
932 If VARIABLE does not have a buffer-local binding in BUFFER, the value
933 is the default binding of the variable. */)
934 (register Lisp_Object variable
, register Lisp_Object buffer
)
936 register struct buffer
*buf
;
937 register Lisp_Object result
;
938 struct Lisp_Symbol
*sym
;
940 CHECK_SYMBOL (variable
);
941 CHECK_BUFFER (buffer
);
942 buf
= XBUFFER (buffer
);
943 sym
= XSYMBOL (variable
);
946 switch (sym
->redirect
)
948 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
949 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
950 case SYMBOL_LOCALIZED
:
951 { /* Look in local_var_alist. */
952 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
953 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
954 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
958 { /* What binding is loaded right now? */
959 Lisp_Object current_alist_element
= blv
->valcell
;
961 /* The value of the currently loaded binding is not
962 stored in it, but rather in the realvalue slot.
963 Store that value into the binding it belongs to
964 in case that is the one we are about to use. */
966 XSETCDR (current_alist_element
,
967 do_symval_forwarding (blv
->fwd
));
969 /* Now get the (perhaps updated) value out of the binding. */
970 result
= XCDR (result
);
973 result
= Fdefault_value (variable
);
976 case SYMBOL_FORWARDED
:
978 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
979 if (BUFFER_OBJFWDP (fwd
))
980 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
982 result
= Fdefault_value (variable
);
988 if (!EQ (result
, Qunbound
))
991 xsignal1 (Qvoid_variable
, variable
);
994 /* Return an alist of the Lisp-level buffer-local bindings of
995 buffer BUF. That is, don't include the variables maintained
996 in special slots in the buffer object. */
999 buffer_lisp_local_variables (struct buffer
*buf
)
1001 Lisp_Object result
= Qnil
;
1002 register Lisp_Object tail
;
1003 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1005 Lisp_Object val
, elt
;
1009 /* Reference each variable in the alist in buf.
1010 If inquiring about the current buffer, this gets the current values,
1011 so store them into the alist so the alist is up to date.
1012 If inquiring about some other buffer, this swaps out any values
1013 for that buffer, making the alist up to date automatically. */
1014 val
= find_symbol_value (XCAR (elt
));
1015 /* Use the current buffer value only if buf is the current buffer. */
1016 if (buf
!= current_buffer
)
1019 result
= Fcons (EQ (val
, Qunbound
)
1021 : Fcons (XCAR (elt
), val
),
1028 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1029 Sbuffer_local_variables
, 0, 1, 0,
1030 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1031 Most elements look like (SYMBOL . VALUE), describing one variable.
1032 For a symbol that is locally unbound, just the symbol appears in the value.
1033 Note that storing new VALUEs in these elements doesn't change the variables.
1034 No argument or nil as argument means use current buffer as BUFFER. */)
1035 (register Lisp_Object buffer
)
1037 register struct buffer
*buf
;
1038 register Lisp_Object result
;
1041 buf
= current_buffer
;
1044 CHECK_BUFFER (buffer
);
1045 buf
= XBUFFER (buffer
);
1048 result
= buffer_lisp_local_variables (buf
);
1050 /* Add on all the variables stored in special slots. */
1054 /* buffer-local Lisp variables start at `undo_list',
1055 tho only the ones from `name' on are GC'd normally. */
1056 for (offset
= PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER
);
1057 offset
<= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER
);
1058 /* sizeof EMACS_INT == sizeof Lisp_Object */
1059 offset
+= (sizeof (EMACS_INT
)))
1061 idx
= PER_BUFFER_IDX (offset
);
1062 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1063 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1065 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1066 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1067 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1076 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1078 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1079 No argument or nil as argument means use current buffer as BUFFER. */)
1080 (register Lisp_Object buffer
)
1082 register struct buffer
*buf
;
1084 buf
= current_buffer
;
1087 CHECK_BUFFER (buffer
);
1088 buf
= XBUFFER (buffer
);
1091 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1094 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1096 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1097 A non-nil FLAG means mark the buffer modified. */)
1098 (register Lisp_Object flag
)
1100 register int already
;
1101 register Lisp_Object fn
;
1102 Lisp_Object buffer
, window
;
1104 #ifdef CLASH_DETECTION
1105 /* If buffer becoming modified, lock the file.
1106 If buffer becoming unmodified, unlock the file. */
1108 fn
= BVAR (current_buffer
, file_truename
);
1109 /* Test buffer-file-name so that binding it to nil is effective. */
1110 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1112 already
= SAVE_MODIFF
< MODIFF
;
1113 if (!already
&& !NILP (flag
))
1115 else if (already
&& NILP (flag
))
1118 #endif /* CLASH_DETECTION */
1120 /* Here we have a problem. SAVE_MODIFF is used here to encode
1121 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1122 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1123 modify SAVE_MODIFF to affect one, we may affect the other
1125 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1126 if SAVE_MODIFF<auto_save_modified that means we risk changing
1127 recent-auto-save-p from t to nil.
1128 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1129 we risk changing recent-auto-save-p from nil to t. */
1130 SAVE_MODIFF
= (NILP (flag
)
1131 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1133 /* Let's try to preserve recent-auto-save-p. */
1134 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1135 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1136 we can either decrease SAVE_MODIFF and auto_save_modified
1137 or increase MODIFF. */
1140 /* Set update_mode_lines only if buffer is displayed in some window.
1141 Packages like jit-lock or lazy-lock preserve a buffer's modified
1142 state by recording/restoring the state around blocks of code.
1143 Setting update_mode_lines makes redisplay consider all windows
1144 (on all frames). Stealth fontification of buffers not displayed
1145 would incur additional redisplay costs if we'd set
1146 update_modes_lines unconditionally.
1148 Ideally, I think there should be another mechanism for fontifying
1149 buffers without "modifying" buffers, or redisplay should be
1150 smarter about updating the `*' in mode lines. --gerd */
1151 XSETBUFFER (buffer
, current_buffer
);
1152 window
= Fget_buffer_window (buffer
, Qt
);
1153 if (WINDOWP (window
))
1155 ++update_mode_lines
;
1156 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1162 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1163 Srestore_buffer_modified_p
, 1, 1, 0,
1164 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1165 It is not ensured that mode lines will be updated to show the modified
1166 state of the current buffer. Use with care. */)
1169 #ifdef CLASH_DETECTION
1172 /* If buffer becoming modified, lock the file.
1173 If buffer becoming unmodified, unlock the file. */
1175 fn
= BVAR (current_buffer
, file_truename
);
1176 /* Test buffer-file-name so that binding it to nil is effective. */
1177 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1179 int already
= SAVE_MODIFF
< MODIFF
;
1180 if (!already
&& !NILP (flag
))
1182 else if (already
&& NILP (flag
))
1185 #endif /* CLASH_DETECTION */
1187 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1191 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1193 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1194 Each buffer has a tick counter which is incremented each time the
1195 text in that buffer is changed. It wraps around occasionally.
1196 No argument or nil as argument means use current buffer as BUFFER. */)
1197 (register Lisp_Object buffer
)
1199 register struct buffer
*buf
;
1201 buf
= current_buffer
;
1204 CHECK_BUFFER (buffer
);
1205 buf
= XBUFFER (buffer
);
1208 return make_number (BUF_MODIFF (buf
));
1211 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1212 Sbuffer_chars_modified_tick
, 0, 1, 0,
1213 doc
: /* Return BUFFER's character-change tick counter.
1214 Each buffer has a character-change tick counter, which is set to the
1215 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1216 time text in that buffer is inserted or deleted. By comparing the
1217 values returned by two individual calls of `buffer-chars-modified-tick',
1218 you can tell whether a character change occurred in that buffer in
1219 between these calls. No argument or nil as argument means use current
1220 buffer as BUFFER. */)
1221 (register Lisp_Object buffer
)
1223 register struct buffer
*buf
;
1225 buf
= current_buffer
;
1228 CHECK_BUFFER (buffer
);
1229 buf
= XBUFFER (buffer
);
1232 return make_number (BUF_CHARS_MODIFF (buf
));
1235 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1236 "(list (read-string \"Rename buffer (to new name): \" \
1237 nil 'buffer-name-history (buffer-name (current-buffer))) \
1238 current-prefix-arg)",
1239 doc
: /* Change current buffer's name to NEWNAME (a string).
1240 If second arg UNIQUE is nil or omitted, it is an error if a
1241 buffer named NEWNAME already exists.
1242 If UNIQUE is non-nil, come up with a new name using
1243 `generate-new-buffer-name'.
1244 Interactively, you can set UNIQUE with a prefix argument.
1245 We return the name we actually gave the buffer.
1246 This does not change the name of the visited file (if any). */)
1247 (register Lisp_Object newname
, Lisp_Object unique
)
1249 register Lisp_Object tem
, buf
;
1251 CHECK_STRING (newname
);
1253 if (SCHARS (newname
) == 0)
1254 error ("Empty string is invalid as a buffer name");
1256 tem
= Fget_buffer (newname
);
1259 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1260 rename the buffer automatically so you can create another
1261 with the original name. It makes UNIQUE equivalent to
1262 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1263 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1264 return BVAR (current_buffer
, name
);
1266 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1268 error ("Buffer name `%s' is in use", SDATA (newname
));
1271 BVAR (current_buffer
, name
) = newname
;
1273 /* Catch redisplay's attention. Unless we do this, the mode lines for
1274 any windows displaying current_buffer will stay unchanged. */
1275 update_mode_lines
++;
1277 XSETBUFFER (buf
, current_buffer
);
1278 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1279 if (NILP (BVAR (current_buffer
, filename
))
1280 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1281 call0 (intern ("rename-auto-save-file"));
1283 /* Run buffer-list-update-hook. */
1284 if (!NILP (Vrun_hooks
))
1285 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1287 /* Refetch since that last call may have done GC. */
1288 return BVAR (current_buffer
, name
);
1291 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1292 doc
: /* Return most recently selected buffer other than BUFFER.
1293 Buffers not visible in windows are preferred to visible buffers, unless
1294 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1295 BUFFER unless it denotes a live buffer. If the optional third argument
1296 FRAME is non-nil, use that frame's buffer list instead of the selected
1297 frame's buffer list.
1299 The buffer is found by scanning the selected or specified frame's buffer
1300 list first, followed by the list of all buffers. If no other buffer
1301 exists, return the buffer `*scratch*' (creating it if necessary). */)
1302 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1304 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1305 Lisp_Object tail
, buf
, pred
;
1306 Lisp_Object notsogood
= Qnil
;
1309 frame
= selected_frame
;
1311 CHECK_FRAME (frame
);
1313 pred
= frame_buffer_predicate (frame
);
1314 /* Consider buffers that have been seen in the frame first. */
1315 tail
= XFRAME (frame
)->buffer_list
;
1316 for (; CONSP (tail
); tail
= XCDR (tail
))
1319 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1320 && !NILP (BVAR (XBUFFER (buf
), name
))
1321 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1322 /* If the frame has a buffer_predicate, disregard buffers that
1323 don't fit the predicate. */
1324 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1326 if (!NILP (visible_ok
)
1327 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1329 else if (NILP (notsogood
))
1334 /* Consider alist of all buffers next. */
1335 tail
= Vbuffer_alist
;
1336 for (; CONSP (tail
); tail
= XCDR (tail
))
1338 buf
= Fcdr (XCAR (tail
));
1339 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1340 && !NILP (BVAR (XBUFFER (buf
), name
))
1341 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1342 /* If the frame has a buffer_predicate, disregard buffers that
1343 don't fit the predicate. */
1344 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1346 if (!NILP (visible_ok
)
1347 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1349 else if (NILP (notsogood
))
1354 if (!NILP (notsogood
))
1358 buf
= Fget_buffer (build_string ("*scratch*"));
1361 buf
= Fget_buffer_create (build_string ("*scratch*"));
1362 Fset_buffer_major_mode (buf
);
1368 /* The following function is a safe variant of Fother_buffer: It doesn't
1369 pay attention to any frame-local buffer lists, doesn't care about
1370 visibility of buffers, and doesn't evaluate any frame predicates. */
1373 other_buffer_safely (Lisp_Object buffer
)
1375 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1376 Lisp_Object tail
, buf
;
1378 tail
= Vbuffer_alist
;
1379 for (; CONSP (tail
); tail
= XCDR (tail
))
1381 buf
= Fcdr (XCAR (tail
));
1382 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1383 && !NILP (BVAR (XBUFFER (buf
), name
))
1384 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1388 buf
= Fget_buffer (build_string ("*scratch*"));
1391 buf
= Fget_buffer_create (build_string ("*scratch*"));
1392 Fset_buffer_major_mode (buf
);
1398 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1400 doc
: /* Start keeping undo information for buffer BUFFER.
1401 No argument or nil as argument means do this for the current buffer. */)
1402 (register Lisp_Object buffer
)
1404 Lisp_Object real_buffer
;
1407 XSETBUFFER (real_buffer
, current_buffer
);
1410 real_buffer
= Fget_buffer (buffer
);
1411 if (NILP (real_buffer
))
1415 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1416 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1422 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1423 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1424 The buffer being killed will be current while the hook is running.\n\
1427 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1428 doc
: /* Kill buffer BUFFER-OR-NAME.
1429 The argument may be a buffer or the name of an existing buffer.
1430 Argument nil or omitted means kill the current buffer. Return t if the
1431 buffer is actually killed, nil otherwise.
1433 This function calls `replace-buffer-in-windows' for cleaning up all
1434 windows currently displaying the buffer to be killed. The functions in
1435 `kill-buffer-query-functions' are called with the buffer to be killed as
1436 the current buffer. If any of them returns nil, the buffer is not
1437 killed. The hook `kill-buffer-hook' is run before the buffer is
1438 actually killed. The buffer being killed will be current while the hook
1441 Any processes that have this buffer as the `process-buffer' are killed
1443 (Lisp_Object buffer_or_name
)
1446 register struct buffer
*b
;
1447 register Lisp_Object tem
;
1448 register struct Lisp_Marker
*m
;
1449 struct gcpro gcpro1
;
1451 if (NILP (buffer_or_name
))
1452 buffer
= Fcurrent_buffer ();
1454 buffer
= Fget_buffer (buffer_or_name
);
1456 nsberror (buffer_or_name
);
1458 b
= XBUFFER (buffer
);
1460 /* Avoid trouble for buffer already dead. */
1461 if (NILP (BVAR (b
, name
)))
1464 /* Query if the buffer is still modified. */
1465 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1466 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1469 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1470 BVAR (b
, name
), make_number (0)));
1476 /* Run hooks with the buffer to be killed the current buffer. */
1478 ptrdiff_t count
= SPECPDL_INDEX ();
1479 Lisp_Object arglist
[1];
1481 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1482 set_buffer_internal (b
);
1484 /* First run the query functions; if any query is answered no,
1485 don't kill the buffer. */
1486 arglist
[0] = Qkill_buffer_query_functions
;
1487 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1489 return unbind_to (count
, Qnil
);
1491 /* Then run the hooks. */
1492 Frun_hooks (1, &Qkill_buffer_hook
);
1493 unbind_to (count
, Qnil
);
1496 /* We have no more questions to ask. Verify that it is valid
1497 to kill the buffer. This must be done after the questions
1498 since anything can happen within do_yes_or_no_p. */
1500 /* Don't kill the minibuffer now current. */
1501 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1504 if (NILP (BVAR (b
, name
)))
1507 /* When we kill a base buffer, kill all its indirect buffers.
1508 We do it at this stage so nothing terrible happens if they
1509 ask questions or their hooks get errors. */
1510 if (! b
->base_buffer
)
1512 struct buffer
*other
;
1516 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1517 /* all_buffers contains dead buffers too;
1518 don't re-kill them. */
1519 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1522 XSETBUFFER (buf
, other
);
1529 /* Run replace_buffer_in_windows before making another buffer current
1530 since set-window-buffer-start-and-point will refuse to make another
1531 buffer current if the selected window does not show the current
1532 buffer. (Bug#10114) */
1533 replace_buffer_in_windows (buffer
);
1535 /* Make this buffer not be current.
1536 In the process, notice if this is the sole visible buffer
1537 and give up if so. */
1538 if (b
== current_buffer
)
1540 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1542 if (b
== current_buffer
)
1546 /* Notice if the buffer to kill is the sole visible buffer
1547 when we're currently in the mini-buffer, and give up if so. */
1548 XSETBUFFER (tem
, current_buffer
);
1549 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1551 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1552 if (EQ (buffer
, tem
))
1556 /* Now there is no question: we can kill the buffer. */
1558 #ifdef CLASH_DETECTION
1559 /* Unlock this buffer's file, if it is locked. */
1561 #endif /* CLASH_DETECTION */
1564 kill_buffer_processes (buffer
);
1567 /* Killing buffer processes may run sentinels which may
1568 have called kill-buffer. */
1570 if (NILP (BVAR (b
, name
)))
1573 /* These may run Lisp code and into infinite loops (if someone
1574 insisted on circular lists) so allow quitting here. */
1575 frames_discard_buffer (buffer
);
1577 clear_charpos_cache (b
);
1579 tem
= Vinhibit_quit
;
1581 /* Remove the buffer from the list of all buffers. */
1582 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1583 /* If replace_buffer_in_windows didn't do its job correctly fix that
1585 replace_buffer_in_windows_safely (buffer
);
1586 Vinhibit_quit
= tem
;
1588 /* Delete any auto-save file, if we saved it in this session.
1589 But not if the buffer is modified. */
1590 if (STRINGP (BVAR (b
, auto_save_file_name
))
1591 && BUF_AUTOSAVE_MODIFF (b
) != 0
1592 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1593 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1594 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1597 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1598 if (! NILP (delete))
1599 internal_delete_file (BVAR (b
, auto_save_file_name
));
1604 /* Unchain all markers that belong to this indirect buffer.
1605 Don't unchain the markers that belong to the base buffer
1606 or its other indirect buffers. */
1607 for (m
= BUF_MARKERS (b
); m
; )
1609 struct Lisp_Marker
*next
= m
->next
;
1617 /* Unchain all markers of this buffer and its indirect buffers.
1618 and leave them pointing nowhere. */
1619 for (m
= BUF_MARKERS (b
); m
; )
1621 struct Lisp_Marker
*next
= m
->next
;
1626 BUF_MARKERS (b
) = NULL
;
1627 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1629 /* Perhaps we should explicitly free the interval tree here... */
1632 /* Reset the local variables, so that this buffer's local values
1633 won't be protected from GC. They would be protected
1634 if they happened to remain cached in their symbols.
1635 This gets rid of them for certain. */
1636 swap_out_buffer_local_variables (b
);
1637 reset_buffer_local_variables (b
, 1);
1639 BVAR (b
, name
) = Qnil
;
1642 if (! b
->base_buffer
)
1643 free_buffer_text (b
);
1645 if (b
->newline_cache
)
1647 free_region_cache (b
->newline_cache
);
1648 b
->newline_cache
= 0;
1650 if (b
->width_run_cache
)
1652 free_region_cache (b
->width_run_cache
);
1653 b
->width_run_cache
= 0;
1655 BVAR (b
, width_table
) = Qnil
;
1657 BVAR (b
, undo_list
) = Qnil
;
1659 /* Run buffer-list-update-hook. */
1660 if (!NILP (Vrun_hooks
))
1661 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1666 /* Move association for BUFFER to the front of buffer (a)lists. Since
1667 we do this each time BUFFER is selected visibly, the more recently
1668 selected buffers are always closer to the front of those lists. This
1669 means that other_buffer is more likely to choose a relevant buffer.
1671 Note that this moves BUFFER to the front of the buffer lists of the
1672 selected frame even if BUFFER is not shown there. If BUFFER is not
1673 shown in the selected frame, consider the present behavior a feature.
1674 `select-window' gets this right since it shows BUFFER in the selected
1675 window when calling us. */
1678 record_buffer (Lisp_Object buffer
)
1680 Lisp_Object aelt
, aelt_cons
, tem
;
1681 register struct frame
*f
= XFRAME (selected_frame
);
1683 CHECK_BUFFER (buffer
);
1685 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1686 Don't allow quitting since this might leave the buffer list in an
1687 inconsistent state. */
1688 tem
= Vinhibit_quit
;
1690 aelt
= Frassq (buffer
, Vbuffer_alist
);
1691 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1692 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1693 XSETCDR (aelt_cons
, Vbuffer_alist
);
1694 Vbuffer_alist
= aelt_cons
;
1695 Vinhibit_quit
= tem
;
1697 /* Update buffer list of selected frame. */
1698 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1699 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1701 /* Run buffer-list-update-hook. */
1702 if (!NILP (Vrun_hooks
))
1703 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1707 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1708 buffer is killed. For the selected frame's buffer list this moves
1709 BUFFER to its end even if it was never shown in that frame. If
1710 this happens we have a feature, hence `bury-buffer-internal' should be
1711 called only when BUFFER was shown in the selected frame. */
1713 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1715 doc
: /* Move BUFFER to the end of the buffer list. */)
1716 (Lisp_Object buffer
)
1718 Lisp_Object aelt
, aelt_cons
, tem
;
1719 register struct frame
*f
= XFRAME (selected_frame
);
1721 CHECK_BUFFER (buffer
);
1723 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1724 Don't allow quitting since this might leave the buffer list in an
1725 inconsistent state. */
1726 tem
= Vinhibit_quit
;
1728 aelt
= Frassq (buffer
, Vbuffer_alist
);
1729 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1730 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1731 XSETCDR (aelt_cons
, Qnil
);
1732 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1733 Vinhibit_quit
= tem
;
1735 /* Update buffer lists of selected frame. */
1736 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1737 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1739 /* Run buffer-list-update-hook. */
1740 if (!NILP (Vrun_hooks
))
1741 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1746 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1747 doc
: /* Set an appropriate major mode for BUFFER.
1748 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1749 according to `default-major-mode'.
1750 Use this function before selecting the buffer, since it may need to inspect
1751 the current buffer's major mode. */)
1752 (Lisp_Object buffer
)
1755 Lisp_Object function
;
1757 CHECK_BUFFER (buffer
);
1759 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1760 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1761 function
= find_symbol_value (intern ("initial-major-mode"));
1764 function
= BVAR (&buffer_defaults
, major_mode
);
1766 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1767 function
= BVAR (current_buffer
, major_mode
);
1770 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1773 count
= SPECPDL_INDEX ();
1775 /* To select a nonfundamental mode,
1776 select the buffer temporarily and then call the mode function. */
1778 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1780 Fset_buffer (buffer
);
1783 return unbind_to (count
, Qnil
);
1786 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1787 doc
: /* Return the current buffer as a Lisp object. */)
1790 register Lisp_Object buf
;
1791 XSETBUFFER (buf
, current_buffer
);
1795 /* Set the current buffer to B.
1797 We previously set windows_or_buffers_changed here to invalidate
1798 global unchanged information in beg_unchanged and end_unchanged.
1799 This is no longer necessary because we now compute unchanged
1800 information on a buffer-basis. Every action affecting other
1801 windows than the selected one requires a select_window at some
1802 time, and that increments windows_or_buffers_changed. */
1805 set_buffer_internal (register struct buffer
*b
)
1807 if (current_buffer
!= b
)
1808 set_buffer_internal_1 (b
);
1811 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1812 This is used by redisplay. */
1815 set_buffer_internal_1 (register struct buffer
*b
)
1817 register struct buffer
*old_buf
;
1818 register Lisp_Object tail
;
1820 #ifdef USE_MMAP_FOR_BUFFERS
1821 if (b
->text
->beg
== NULL
)
1822 enlarge_buffer_text (b
, 0);
1823 #endif /* USE_MMAP_FOR_BUFFERS */
1825 if (current_buffer
== b
)
1828 old_buf
= current_buffer
;
1830 last_known_column_point
= -1; /* invalidate indentation cache */
1834 /* Put the undo list back in the base buffer, so that it appears
1835 that an indirect buffer shares the undo list of its base. */
1836 if (old_buf
->base_buffer
)
1837 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1839 /* If the old current buffer has markers to record PT, BEGV and ZV
1840 when it is not current, update them now. */
1841 record_buffer_markers (old_buf
);
1844 /* Get the undo list from the base buffer, so that it appears
1845 that an indirect buffer shares the undo list of its base. */
1847 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1849 /* If the new current buffer has markers to record PT, BEGV and ZV
1850 when it is not current, fetch them now. */
1851 fetch_buffer_markers (b
);
1853 /* Look down buffer's list of local Lisp variables
1854 to find and update any that forward into C variables. */
1858 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1860 Lisp_Object var
= XCAR (XCAR (tail
));
1861 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1862 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1863 && SYMBOL_BLV (sym
)->fwd
)
1864 /* Just reference the variable
1865 to cause it to become set for this buffer. */
1866 Fsymbol_value (var
);
1869 /* Do the same with any others that were local to the previous buffer */
1870 while (b
!= old_buf
&& (b
= old_buf
, b
));
1873 /* Switch to buffer B temporarily for redisplay purposes.
1874 This avoids certain things that don't need to be done within redisplay. */
1877 set_buffer_temp (struct buffer
*b
)
1879 register struct buffer
*old_buf
;
1881 if (current_buffer
== b
)
1884 old_buf
= current_buffer
;
1887 /* If the old current buffer has markers to record PT, BEGV and ZV
1888 when it is not current, update them now. */
1889 record_buffer_markers (old_buf
);
1891 /* If the new current buffer has markers to record PT, BEGV and ZV
1892 when it is not current, fetch them now. */
1893 fetch_buffer_markers (b
);
1896 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1897 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1898 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1899 also `save-excursion' when you want to make a buffer current
1900 temporarily. This function does not display the buffer, so its effect
1901 ends when the current command terminates. Use `switch-to-buffer' or
1902 `pop-to-buffer' to switch buffers permanently. */)
1903 (register Lisp_Object buffer_or_name
)
1905 register Lisp_Object buffer
;
1906 buffer
= Fget_buffer (buffer_or_name
);
1908 nsberror (buffer_or_name
);
1909 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1910 error ("Selecting deleted buffer");
1911 set_buffer_internal (XBUFFER (buffer
));
1915 /* Set the current buffer to BUFFER provided it is alive. */
1918 set_buffer_if_live (Lisp_Object buffer
)
1920 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1921 Fset_buffer (buffer
);
1925 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1926 Sbarf_if_buffer_read_only
, 0, 0, 0,
1927 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1930 if (!NILP (BVAR (current_buffer
, read_only
))
1931 && NILP (Vinhibit_read_only
))
1932 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1936 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1937 doc
: /* Delete the entire contents of the current buffer.
1938 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1939 so the buffer is truly empty after this. */)
1946 current_buffer
->last_window_start
= 1;
1947 /* Prevent warnings, or suspension of auto saving, that would happen
1948 if future size is less than past size. Use of erase-buffer
1949 implies that the future text is not really related to the past text. */
1950 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1955 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1957 CHECK_NUMBER_COERCE_MARKER (*b
);
1958 CHECK_NUMBER_COERCE_MARKER (*e
);
1960 if (XINT (*b
) > XINT (*e
))
1963 tem
= *b
; *b
= *e
; *e
= tem
;
1966 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
1967 args_out_of_range (*b
, *e
);
1970 /* Advance BYTE_POS up to a character boundary
1971 and return the adjusted position. */
1974 advance_to_char_boundary (ptrdiff_t byte_pos
)
1978 if (byte_pos
== BEG
)
1979 /* Beginning of buffer is always a character boundary. */
1982 c
= FETCH_BYTE (byte_pos
);
1983 if (! CHAR_HEAD_P (c
))
1985 /* We should advance BYTE_POS only when C is a constituent of a
1986 multibyte sequence. */
1987 ptrdiff_t orig_byte_pos
= byte_pos
;
1992 c
= FETCH_BYTE (byte_pos
);
1994 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1996 if (byte_pos
< orig_byte_pos
)
1997 byte_pos
= orig_byte_pos
;
1998 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1999 surely advance to the correct character boundary. If C is
2000 not, BYTE_POS was unchanged. */
2006 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2008 doc
: /* Swap the text between current buffer and BUFFER. */)
2009 (Lisp_Object buffer
)
2011 struct buffer
*other_buffer
;
2012 CHECK_BUFFER (buffer
);
2013 other_buffer
= XBUFFER (buffer
);
2015 if (NILP (BVAR (other_buffer
, name
)))
2016 error ("Cannot swap a dead buffer's text");
2018 /* Actually, it probably works just fine.
2019 * if (other_buffer == current_buffer)
2020 * error ("Cannot swap a buffer's text with itself"); */
2022 /* Actually, this may be workable as well, tho probably only if they're
2024 if (other_buffer
->base_buffer
2025 || current_buffer
->base_buffer
)
2026 error ("Cannot swap indirect buffers's text");
2028 { /* This is probably harder to make work. */
2029 struct buffer
*other
;
2030 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2031 if (other
->base_buffer
== other_buffer
2032 || other
->base_buffer
== current_buffer
)
2033 error ("One of the buffers to swap has indirect buffers");
2036 #define swapfield(field, type) \
2038 type tmp##field = other_buffer->field; \
2039 other_buffer->field = current_buffer->field; \
2040 current_buffer->field = tmp##field; \
2042 #define swapfield_(field, type) \
2044 type tmp##field = BVAR (other_buffer, field); \
2045 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2046 BVAR (current_buffer, field) = tmp##field; \
2049 swapfield (own_text
, struct buffer_text
);
2050 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2051 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2053 r_alloc_reset_variable ((void **) ¤t_buffer
->own_text
.beg
,
2054 (void **) &other_buffer
->own_text
.beg
);
2055 r_alloc_reset_variable ((void **) &other_buffer
->own_text
.beg
,
2056 (void **) ¤t_buffer
->own_text
.beg
);
2057 #endif /* REL_ALLOC */
2059 swapfield (pt
, ptrdiff_t);
2060 swapfield (pt_byte
, ptrdiff_t);
2061 swapfield (begv
, ptrdiff_t);
2062 swapfield (begv_byte
, ptrdiff_t);
2063 swapfield (zv
, ptrdiff_t);
2064 swapfield (zv_byte
, ptrdiff_t);
2065 eassert (!current_buffer
->base_buffer
);
2066 eassert (!other_buffer
->base_buffer
);
2067 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2068 swapfield (newline_cache
, struct region_cache
*);
2069 swapfield (width_run_cache
, struct region_cache
*);
2070 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2071 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2072 swapfield (overlays_before
, struct Lisp_Overlay
*);
2073 swapfield (overlays_after
, struct Lisp_Overlay
*);
2074 swapfield (overlay_center
, ptrdiff_t);
2075 swapfield_ (undo_list
, Lisp_Object
);
2076 swapfield_ (mark
, Lisp_Object
);
2077 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2078 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2079 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2080 /* FIXME: Not sure what we should do with these *_marker fields.
2081 Hopefully they're just nil anyway. */
2082 swapfield_ (pt_marker
, Lisp_Object
);
2083 swapfield_ (begv_marker
, Lisp_Object
);
2084 swapfield_ (zv_marker
, Lisp_Object
);
2085 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2086 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2088 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2089 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2090 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2091 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2092 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2093 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2094 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2096 struct Lisp_Marker
*m
;
2097 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2098 if (m
->buffer
== other_buffer
)
2099 m
->buffer
= current_buffer
;
2101 /* Since there's no indirect buffer in sight, markers on
2102 BUF_MARKERS(buf) should either be for `buf' or dead. */
2103 eassert (!m
->buffer
);
2104 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2105 if (m
->buffer
== current_buffer
)
2106 m
->buffer
= other_buffer
;
2108 /* Since there's no indirect buffer in sight, markers on
2109 BUF_MARKERS(buf) should either be for `buf' or dead. */
2110 eassert (!m
->buffer
);
2112 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2113 So since we just swapped the markers between the two buffers, we need
2114 to undo the effect of this swap for window markers. */
2115 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2116 Lisp_Object buf1
, buf2
;
2117 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2119 while (NILP (Fmemq (w
, ws
)))
2122 if (MARKERP (XWINDOW (w
)->pointm
)
2123 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2124 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2125 Fset_marker (XWINDOW (w
)->pointm
,
2126 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2127 XWINDOW (w
)->buffer
);
2128 w
= Fnext_window (w
, Qt
, Qt
);
2132 if (current_buffer
->text
->intervals
)
2133 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2134 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2135 if (other_buffer
->text
->intervals
)
2136 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2137 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2142 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2144 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2145 If FLAG is t, this makes the buffer a multibyte buffer.
2146 If FLAG is nil, this makes the buffer a single-byte buffer.
2147 In these cases, the buffer contents remain unchanged as a sequence of
2148 bytes but the contents viewed as characters do change.
2149 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2150 all eight-bit bytes to eight-bit characters.
2151 If the multibyte flag was really changed, undo information of the
2152 current buffer is cleared. */)
2155 struct Lisp_Marker
*tail
, *markers
;
2156 struct buffer
*other
;
2158 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2159 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2160 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2161 struct gcpro gcpro1
;
2163 if (current_buffer
->base_buffer
)
2164 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2166 /* Do nothing if nothing actually changes. */
2167 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2172 /* Don't record these buffer changes. We will put a special undo entry
2174 BVAR (current_buffer
, undo_list
) = Qt
;
2176 /* If the cached position is for this buffer, clear it out. */
2177 clear_charpos_cache (current_buffer
);
2180 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2182 begv
= BEGV
, zv
= ZV
;
2189 ptrdiff_t pos
, stop
;
2192 /* Do this first, so it can use CHAR_TO_BYTE
2193 to calculate the old correspondences. */
2194 set_intervals_multibyte (0);
2196 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2202 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2205 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2206 tail
->charpos
= tail
->bytepos
;
2208 /* Convert multibyte form of 8-bit characters to unibyte. */
2223 if (ASCII_BYTE_P (*p
))
2225 else if (CHAR_BYTE8_HEAD_P (*p
))
2227 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2228 /* Delete all bytes for this 8-bit character but the
2229 last one, and change the last one to the character
2232 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2244 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2245 p
+= bytes
, pos
+= bytes
;
2249 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2254 ptrdiff_t pos
, stop
;
2255 unsigned char *p
, *pend
;
2257 /* Be sure not to have a multibyte sequence striding over the GAP.
2258 Ex: We change this: "...abc\302 _GAP_ \241def..."
2259 to: "...abc _GAP_ \302\241def..." */
2262 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2263 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2265 unsigned char *q
= GPT_ADDR
- 1;
2267 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2268 if (LEADING_CODE_P (*q
))
2270 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2272 move_gap_both (new_gpt
, new_gpt
);
2276 /* Make the buffer contents valid as multibyte by converting
2277 8-bit characters to multibyte form. */
2295 if (ASCII_BYTE_P (*p
))
2297 else if (EQ (flag
, Qt
)
2298 && ! CHAR_BYTE8_HEAD_P (*p
)
2299 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2300 p
+= bytes
, pos
+= bytes
;
2303 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2306 c
= BYTE8_TO_CHAR (*p
);
2307 bytes
= CHAR_STRING (c
, tmp
);
2309 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2311 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2312 /* Now the gap is after the just inserted data. */
2330 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2332 /* Do this first, so that chars_in_text asks the right question.
2333 set_intervals_multibyte needs it too. */
2334 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2336 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2337 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2339 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2341 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2342 if (BEGV_BYTE
> GPT_BYTE
)
2343 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2345 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2347 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2348 if (ZV_BYTE
> GPT_BYTE
)
2349 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2351 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2354 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2357 if (byte
> GPT_BYTE
)
2358 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2360 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2361 TEMP_SET_PT_BOTH (position
, byte
);
2364 tail
= markers
= BUF_MARKERS (current_buffer
);
2366 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2367 getting confused by the markers that have not yet been updated.
2368 It is also a signal that it should never create a marker. */
2369 BUF_MARKERS (current_buffer
) = NULL
;
2371 for (; tail
; tail
= tail
->next
)
2373 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2374 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2377 /* Make sure no markers were put on the chain
2378 while the chain value was incorrect. */
2379 if (BUF_MARKERS (current_buffer
))
2382 BUF_MARKERS (current_buffer
) = markers
;
2384 /* Do this last, so it can calculate the new correspondences
2385 between chars and bytes. */
2386 set_intervals_multibyte (1);
2389 if (!EQ (old_undo
, Qt
))
2391 /* Represent all the above changes by a special undo entry. */
2392 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2393 intern ("set-buffer-multibyte"),
2394 NILP (flag
) ? Qt
: Qnil
),
2400 /* Changing the multibyteness of a buffer means that all windows
2401 showing that buffer must be updated thoroughly. */
2402 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2403 ++windows_or_buffers_changed
;
2405 /* Copy this buffer's new multibyte status
2406 into all of its indirect buffers. */
2407 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2408 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2410 BVAR (other
, enable_multibyte_characters
)
2411 = BVAR (current_buffer
, enable_multibyte_characters
);
2412 other
->prevent_redisplay_optimizations_p
= 1;
2415 /* Restore the modifiedness of the buffer. */
2416 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2417 Fset_buffer_modified_p (Qnil
);
2419 /* Update coding systems of this buffer's process (if any). */
2421 Lisp_Object process
;
2423 process
= Fget_buffer_process (Fcurrent_buffer ());
2424 if (PROCESSP (process
))
2425 setup_process_coding_systems (process
);
2431 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2432 Skill_all_local_variables
, 0, 0, 0,
2433 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2434 Most local variable bindings are eliminated so that the default values
2435 become effective once more. Also, the syntax table is set from
2436 `standard-syntax-table', the local keymap is set to nil,
2437 and the abbrev table from `fundamental-mode-abbrev-table'.
2438 This function also forces redisplay of the mode line.
2440 Every function to select a new major mode starts by
2441 calling this function.
2443 As a special exception, local variables whose names have
2444 a non-nil `permanent-local' property are not eliminated by this function.
2446 The first thing this function does is run
2447 the normal hook `change-major-mode-hook'. */)
2450 Frun_hooks (1, &Qchange_major_mode_hook
);
2452 /* Make sure none of the bindings in local_var_alist
2453 remain swapped in, in their symbols. */
2455 swap_out_buffer_local_variables (current_buffer
);
2457 /* Actually eliminate all local bindings of this buffer. */
2459 reset_buffer_local_variables (current_buffer
, 0);
2461 /* Force mode-line redisplay. Useful here because all major mode
2462 commands call this function. */
2463 update_mode_lines
++;
2468 /* Make sure no local variables remain set up with buffer B
2469 for their current values. */
2472 swap_out_buffer_local_variables (struct buffer
*b
)
2474 Lisp_Object oalist
, alist
, buffer
;
2476 XSETBUFFER (buffer
, b
);
2477 oalist
= BVAR (b
, local_var_alist
);
2479 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2481 Lisp_Object sym
= XCAR (XCAR (alist
));
2482 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2483 /* Need not do anything if some other buffer's binding is
2485 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2487 /* Symbol is set up for this buffer's old local value:
2489 swap_in_global_binding (XSYMBOL (sym
));
2494 /* Find all the overlays in the current buffer that contain position POS.
2495 Return the number found, and store them in a vector in *VEC_PTR.
2496 Store in *LEN_PTR the size allocated for the vector.
2497 Store in *NEXT_PTR the next position after POS where an overlay starts,
2498 or ZV if there are no more overlays between POS and ZV.
2499 Store in *PREV_PTR the previous position before POS where an overlay ends,
2500 or where an overlay starts which ends at or after POS;
2501 or BEGV if there are no such overlays from BEGV to POS.
2502 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2504 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2505 when this function is called.
2507 If EXTEND is non-zero, we make the vector bigger if necessary.
2508 If EXTEND is zero, we never extend the vector,
2509 and we store only as many overlays as will fit.
2510 But we still return the total number of overlays.
2512 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2513 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2514 default (BEGV or ZV). */
2517 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2519 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2521 Lisp_Object overlay
, start
, end
;
2522 struct Lisp_Overlay
*tail
;
2524 ptrdiff_t len
= *len_ptr
;
2525 Lisp_Object
*vec
= *vec_ptr
;
2526 ptrdiff_t next
= ZV
;
2527 ptrdiff_t prev
= BEGV
;
2528 int inhibit_storing
= 0;
2530 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2532 ptrdiff_t startpos
, endpos
;
2534 XSETMISC (overlay
, tail
);
2536 start
= OVERLAY_START (overlay
);
2537 end
= OVERLAY_END (overlay
);
2538 endpos
= OVERLAY_POSITION (end
);
2545 startpos
= OVERLAY_POSITION (start
);
2546 /* This one ends at or after POS
2547 so its start counts for PREV_PTR if it's before POS. */
2548 if (prev
< startpos
&& startpos
< pos
)
2552 if (startpos
<= pos
)
2556 /* The supplied vector is full.
2557 Either make it bigger, or don't store any more in it. */
2560 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2566 inhibit_storing
= 1;
2569 if (!inhibit_storing
)
2571 /* Keep counting overlays even if we can't return them all. */
2574 else if (startpos
< next
)
2578 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2580 ptrdiff_t startpos
, endpos
;
2582 XSETMISC (overlay
, tail
);
2584 start
= OVERLAY_START (overlay
);
2585 end
= OVERLAY_END (overlay
);
2586 startpos
= OVERLAY_POSITION (start
);
2589 if (startpos
< next
)
2593 endpos
= OVERLAY_POSITION (end
);
2600 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2606 inhibit_storing
= 1;
2609 if (!inhibit_storing
)
2613 if (startpos
< pos
&& startpos
> prev
)
2616 else if (endpos
< pos
&& endpos
> prev
)
2618 else if (endpos
== pos
&& startpos
> prev
2619 && (!change_req
|| startpos
< pos
))
2630 /* Find all the overlays in the current buffer that overlap the range
2631 BEG-END, or are empty at BEG, or are empty at END provided END
2632 denotes the position at the end of the current buffer.
2634 Return the number found, and store them in a vector in *VEC_PTR.
2635 Store in *LEN_PTR the size allocated for the vector.
2636 Store in *NEXT_PTR the next position after POS where an overlay starts,
2637 or ZV if there are no more overlays.
2638 Store in *PREV_PTR the previous position before POS where an overlay ends,
2639 or BEGV if there are no previous overlays.
2640 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2642 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2643 when this function is called.
2645 If EXTEND is non-zero, we make the vector bigger if necessary.
2646 If EXTEND is zero, we never extend the vector,
2647 and we store only as many overlays as will fit.
2648 But we still return the total number of overlays. */
2651 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2652 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2653 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2655 Lisp_Object overlay
, ostart
, oend
;
2656 struct Lisp_Overlay
*tail
;
2658 ptrdiff_t len
= *len_ptr
;
2659 Lisp_Object
*vec
= *vec_ptr
;
2660 ptrdiff_t next
= ZV
;
2661 ptrdiff_t prev
= BEGV
;
2662 int inhibit_storing
= 0;
2663 int end_is_Z
= end
== Z
;
2665 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2667 ptrdiff_t startpos
, endpos
;
2669 XSETMISC (overlay
, tail
);
2671 ostart
= OVERLAY_START (overlay
);
2672 oend
= OVERLAY_END (overlay
);
2673 endpos
= OVERLAY_POSITION (oend
);
2680 startpos
= OVERLAY_POSITION (ostart
);
2681 /* Count an interval if it overlaps the range, is empty at the
2682 start of the range, or is empty at END provided END denotes the
2683 end of the buffer. */
2684 if ((beg
< endpos
&& startpos
< end
)
2685 || (startpos
== endpos
2686 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2690 /* The supplied vector is full.
2691 Either make it bigger, or don't store any more in it. */
2694 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2700 inhibit_storing
= 1;
2703 if (!inhibit_storing
)
2705 /* Keep counting overlays even if we can't return them all. */
2708 else if (startpos
< next
)
2712 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2714 ptrdiff_t startpos
, endpos
;
2716 XSETMISC (overlay
, tail
);
2718 ostart
= OVERLAY_START (overlay
);
2719 oend
= OVERLAY_END (overlay
);
2720 startpos
= OVERLAY_POSITION (ostart
);
2723 if (startpos
< next
)
2727 endpos
= OVERLAY_POSITION (oend
);
2728 /* Count an interval if it overlaps the range, is empty at the
2729 start of the range, or is empty at END provided END denotes the
2730 end of the buffer. */
2731 if ((beg
< endpos
&& startpos
< end
)
2732 || (startpos
== endpos
2733 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2739 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2745 inhibit_storing
= 1;
2748 if (!inhibit_storing
)
2752 else if (endpos
< beg
&& endpos
> prev
)
2764 /* Return non-zero if there exists an overlay with a non-nil
2765 `mouse-face' property overlapping OVERLAY. */
2768 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2770 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2771 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2772 ptrdiff_t n
, i
, size
;
2773 Lisp_Object
*v
, tem
;
2776 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2777 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2780 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2781 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2784 for (i
= 0; i
< n
; ++i
)
2785 if (!EQ (v
[i
], overlay
)
2786 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2795 /* Fast function to just test if we're at an overlay boundary. */
2797 overlay_touches_p (ptrdiff_t pos
)
2799 Lisp_Object overlay
;
2800 struct Lisp_Overlay
*tail
;
2802 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2806 XSETMISC (overlay
,tail
);
2807 if (!OVERLAYP (overlay
))
2810 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2813 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2817 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2821 XSETMISC (overlay
, tail
);
2822 if (!OVERLAYP (overlay
))
2825 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2828 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2836 Lisp_Object overlay
;
2842 compare_overlays (const void *v1
, const void *v2
)
2844 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2845 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2846 if (s1
->priority
!= s2
->priority
)
2847 return s1
->priority
< s2
->priority
? -1 : 1;
2848 if (s1
->beg
!= s2
->beg
)
2849 return s1
->beg
< s2
->beg
? -1 : 1;
2850 if (s1
->end
!= s2
->end
)
2851 return s2
->end
< s1
->end
? -1 : 1;
2852 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2853 between "equal" overlays. The result can still change between
2854 invocations of Emacs, but it won't change in the middle of
2855 `find_field' (bug#6830). */
2856 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2857 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2861 /* Sort an array of overlays by priority. The array is modified in place.
2862 The return value is the new size; this may be smaller than the original
2863 size if some of the overlays were invalid or were window-specific. */
2865 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2868 struct sortvec
*sortvec
;
2869 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2871 /* Put the valid and relevant overlays into sortvec. */
2873 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2876 Lisp_Object overlay
;
2878 overlay
= overlay_vec
[i
];
2879 if (OVERLAY_VALID (overlay
)
2880 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2881 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2883 /* If we're interested in a specific window, then ignore
2884 overlays that are limited to some other window. */
2889 window
= Foverlay_get (overlay
, Qwindow
);
2890 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2894 /* This overlay is good and counts: put it into sortvec. */
2895 sortvec
[j
].overlay
= overlay
;
2896 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2897 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2898 tem
= Foverlay_get (overlay
, Qpriority
);
2900 sortvec
[j
].priority
= XINT (tem
);
2902 sortvec
[j
].priority
= 0;
2908 /* Sort the overlays into the proper order: increasing priority. */
2911 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2913 for (i
= 0; i
< noverlays
; i
++)
2914 overlay_vec
[i
] = sortvec
[i
].overlay
;
2920 Lisp_Object string
, string2
;
2927 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2928 ptrdiff_t size
; /* Allocated length of that array. */
2929 ptrdiff_t used
; /* How much of the array is currently in use. */
2930 ptrdiff_t bytes
; /* Total length of the strings in buf. */
2933 /* Buffers for storing information about the overlays touching a given
2934 position. These could be automatic variables in overlay_strings, but
2935 it's more efficient to hold onto the memory instead of repeatedly
2936 allocating and freeing it. */
2937 static struct sortstrlist overlay_heads
, overlay_tails
;
2938 static unsigned char *overlay_str_buf
;
2940 /* Allocated length of overlay_str_buf. */
2941 static ptrdiff_t overlay_str_len
;
2943 /* A comparison function suitable for passing to qsort. */
2945 cmp_for_strings (const void *as1
, const void *as2
)
2947 struct sortstr
*s1
= (struct sortstr
*)as1
;
2948 struct sortstr
*s2
= (struct sortstr
*)as2
;
2949 if (s1
->size
!= s2
->size
)
2950 return s2
->size
< s1
->size
? -1 : 1;
2951 if (s1
->priority
!= s2
->priority
)
2952 return s1
->priority
< s2
->priority
? -1 : 1;
2957 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2958 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2962 if (ssl
->used
== ssl
->size
)
2963 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
2964 ssl
->buf
[ssl
->used
].string
= str
;
2965 ssl
->buf
[ssl
->used
].string2
= str2
;
2966 ssl
->buf
[ssl
->used
].size
= size
;
2967 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2970 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2971 nbytes
= SCHARS (str
);
2972 else if (! STRING_MULTIBYTE (str
))
2973 nbytes
= count_size_as_multibyte (SDATA (str
),
2976 nbytes
= SBYTES (str
);
2978 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2979 memory_full (SIZE_MAX
);
2980 ssl
->bytes
+= nbytes
;
2984 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2985 nbytes
= SCHARS (str2
);
2986 else if (! STRING_MULTIBYTE (str2
))
2987 nbytes
= count_size_as_multibyte (SDATA (str2
),
2990 nbytes
= SBYTES (str2
);
2992 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
2993 memory_full (SIZE_MAX
);
2994 ssl
->bytes
+= nbytes
;
2998 /* Return the concatenation of the strings associated with overlays that
2999 begin or end at POS, ignoring overlays that are specific to a window
3000 other than W. The strings are concatenated in the appropriate order:
3001 shorter overlays nest inside longer ones, and higher priority inside
3002 lower. Normally all of the after-strings come first, but zero-sized
3003 overlays have their after-strings ride along with the before-strings
3004 because it would look strange to print them inside-out.
3006 Returns the string length, and stores the contents indirectly through
3007 PSTR, if that variable is non-null. The string may be overwritten by
3008 subsequent calls. */
3011 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3013 Lisp_Object overlay
, window
, str
;
3014 struct Lisp_Overlay
*ov
;
3015 ptrdiff_t startpos
, endpos
;
3016 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3018 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3019 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3020 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3022 XSETMISC (overlay
, ov
);
3023 eassert (OVERLAYP (overlay
));
3025 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3026 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3029 if (endpos
!= pos
&& startpos
!= pos
)
3031 window
= Foverlay_get (overlay
, Qwindow
);
3032 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3035 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3036 record_overlay_string (&overlay_heads
, str
,
3038 ? Foverlay_get (overlay
, Qafter_string
)
3040 Foverlay_get (overlay
, Qpriority
),
3042 else if (endpos
== pos
3043 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3044 record_overlay_string (&overlay_tails
, str
, Qnil
,
3045 Foverlay_get (overlay
, Qpriority
),
3048 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3050 XSETMISC (overlay
, ov
);
3051 eassert (OVERLAYP (overlay
));
3053 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3054 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3057 if (endpos
!= pos
&& startpos
!= pos
)
3059 window
= Foverlay_get (overlay
, Qwindow
);
3060 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3063 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3064 record_overlay_string (&overlay_heads
, str
,
3066 ? Foverlay_get (overlay
, Qafter_string
)
3068 Foverlay_get (overlay
, Qpriority
),
3070 else if (endpos
== pos
3071 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3072 record_overlay_string (&overlay_tails
, str
, Qnil
,
3073 Foverlay_get (overlay
, Qpriority
),
3076 if (overlay_tails
.used
> 1)
3077 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3079 if (overlay_heads
.used
> 1)
3080 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3082 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3089 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3090 memory_full (SIZE_MAX
);
3091 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3092 if (total
> overlay_str_len
)
3093 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3094 total
- overlay_str_len
, -1, 1);
3096 p
= overlay_str_buf
;
3097 for (i
= overlay_tails
.used
; --i
>= 0;)
3100 tem
= overlay_tails
.buf
[i
].string
;
3101 nbytes
= copy_text (SDATA (tem
), p
,
3103 STRING_MULTIBYTE (tem
), multibyte
);
3106 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3109 tem
= overlay_heads
.buf
[i
].string
;
3110 nbytes
= copy_text (SDATA (tem
), p
,
3112 STRING_MULTIBYTE (tem
), multibyte
);
3114 tem
= overlay_heads
.buf
[i
].string2
;
3117 nbytes
= copy_text (SDATA (tem
), p
,
3119 STRING_MULTIBYTE (tem
), multibyte
);
3123 if (p
!= overlay_str_buf
+ total
)
3126 *pstr
= overlay_str_buf
;
3132 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3135 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3137 Lisp_Object overlay
, beg
, end
;
3138 struct Lisp_Overlay
*prev
, *tail
, *next
;
3140 /* See if anything in overlays_before should move to overlays_after. */
3142 /* We don't strictly need prev in this loop; it should always be nil.
3143 But we use it for symmetry and in case that should cease to be true
3144 with some future change. */
3146 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3149 XSETMISC (overlay
, tail
);
3151 /* If the overlay is not valid, get rid of it. */
3152 if (!OVERLAY_VALID (overlay
))
3157 /* Splice the cons cell TAIL out of overlays_before. */
3161 buf
->overlays_before
= next
;
3167 beg
= OVERLAY_START (overlay
);
3168 end
= OVERLAY_END (overlay
);
3170 if (OVERLAY_POSITION (end
) > pos
)
3172 /* OVERLAY needs to be moved. */
3173 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3174 struct Lisp_Overlay
*other
, *other_prev
;
3176 /* Splice the cons cell TAIL out of overlays_before. */
3180 buf
->overlays_before
= next
;
3182 /* Search thru overlays_after for where to put it. */
3184 for (other
= buf
->overlays_after
; other
;
3185 other_prev
= other
, other
= other
->next
)
3187 Lisp_Object otherbeg
, otheroverlay
;
3189 XSETMISC (otheroverlay
, other
);
3190 eassert (OVERLAY_VALID (otheroverlay
));
3192 otherbeg
= OVERLAY_START (otheroverlay
);
3193 if (OVERLAY_POSITION (otherbeg
) >= where
)
3197 /* Add TAIL to overlays_after before OTHER. */
3200 other_prev
->next
= tail
;
3202 buf
->overlays_after
= tail
;
3206 /* We've reached the things that should stay in overlays_before.
3207 All the rest of overlays_before must end even earlier,
3212 /* See if anything in overlays_after should be in overlays_before. */
3214 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3217 XSETMISC (overlay
, tail
);
3219 /* If the overlay is not valid, get rid of it. */
3220 if (!OVERLAY_VALID (overlay
))
3225 /* Splice the cons cell TAIL out of overlays_after. */
3229 buf
->overlays_after
= next
;
3235 beg
= OVERLAY_START (overlay
);
3236 end
= OVERLAY_END (overlay
);
3238 /* Stop looking, when we know that nothing further
3239 can possibly end before POS. */
3240 if (OVERLAY_POSITION (beg
) > pos
)
3243 if (OVERLAY_POSITION (end
) <= pos
)
3245 /* OVERLAY needs to be moved. */
3246 ptrdiff_t where
= OVERLAY_POSITION (end
);
3247 struct Lisp_Overlay
*other
, *other_prev
;
3249 /* Splice the cons cell TAIL out of overlays_after. */
3253 buf
->overlays_after
= next
;
3255 /* Search thru overlays_before for where to put it. */
3257 for (other
= buf
->overlays_before
; other
;
3258 other_prev
= other
, other
= other
->next
)
3260 Lisp_Object otherend
, otheroverlay
;
3262 XSETMISC (otheroverlay
, other
);
3263 eassert (OVERLAY_VALID (otheroverlay
));
3265 otherend
= OVERLAY_END (otheroverlay
);
3266 if (OVERLAY_POSITION (otherend
) <= where
)
3270 /* Add TAIL to overlays_before before OTHER. */
3273 other_prev
->next
= tail
;
3275 buf
->overlays_before
= tail
;
3280 buf
->overlay_center
= pos
;
3284 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3286 /* After an insertion, the lists are still sorted properly,
3287 but we may need to update the value of the overlay center. */
3288 if (current_buffer
->overlay_center
>= pos
)
3289 current_buffer
->overlay_center
+= length
;
3293 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3295 if (current_buffer
->overlay_center
< pos
)
3296 /* The deletion was to our right. No change needed; the before- and
3297 after-lists are still consistent. */
3299 else if (current_buffer
->overlay_center
- pos
> length
)
3300 /* The deletion was to our left. We need to adjust the center value
3301 to account for the change in position, but the lists are consistent
3302 given the new value. */
3303 current_buffer
->overlay_center
-= length
;
3305 /* We're right in the middle. There might be things on the after-list
3306 that now belong on the before-list. Recentering will move them,
3307 and also update the center point. */
3308 recenter_overlay_lists (current_buffer
, pos
);
3311 /* Fix up overlays that were garbled as a result of permuting markers
3312 in the range START through END. Any overlay with at least one
3313 endpoint in this range will need to be unlinked from the overlay
3314 list and reinserted in its proper place.
3315 Such an overlay might even have negative size at this point.
3316 If so, we'll make the overlay empty. */
3318 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3320 Lisp_Object overlay
;
3321 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3322 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3323 /* These are either nil, indicating that before_list or after_list
3324 should be assigned, or the cons cell the cdr of which should be
3326 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3327 /* 'Parent', likewise, indicates a cons cell or
3328 current_buffer->overlays_before or overlays_after, depending
3329 which loop we're in. */
3330 struct Lisp_Overlay
*tail
, *parent
;
3331 ptrdiff_t startpos
, endpos
;
3333 /* This algorithm shifts links around instead of consing and GCing.
3334 The loop invariant is that before_list (resp. after_list) is a
3335 well-formed list except that its last element, the CDR of beforep
3336 (resp. afterp) if beforep (afterp) isn't nil or before_list
3337 (after_list) if it is, is still uninitialized. So it's not a bug
3338 that before_list isn't initialized, although it may look
3340 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3342 XSETMISC (overlay
, tail
);
3344 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3345 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3347 /* If the overlay is backwards, make it empty. */
3348 if (endpos
< startpos
)
3351 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3359 || (startpos
>= start
&& startpos
< end
))
3361 /* Add it to the end of the wrong list. Later on,
3362 recenter_overlay_lists will move it to the right place. */
3363 if (endpos
< current_buffer
->overlay_center
)
3368 afterp
->next
= tail
;
3376 beforep
->next
= tail
;
3380 current_buffer
->overlays_before
= tail
->next
;
3382 parent
->next
= tail
->next
;
3386 parent
= tail
, tail
= parent
->next
;
3388 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3390 XSETMISC (overlay
, tail
);
3392 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3393 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3395 /* If the overlay is backwards, make it empty. */
3396 if (endpos
< startpos
)
3399 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3403 if (startpos
>= end
)
3406 if (startpos
>= start
3407 || (endpos
>= start
&& endpos
< end
))
3409 if (endpos
< current_buffer
->overlay_center
)
3414 afterp
->next
= tail
;
3422 beforep
->next
= tail
;
3426 current_buffer
->overlays_after
= tail
->next
;
3428 parent
->next
= tail
->next
;
3432 parent
= tail
, tail
= parent
->next
;
3435 /* Splice the constructed (wrong) lists into the buffer's lists,
3436 and let the recenter function make it sane again. */
3439 beforep
->next
= current_buffer
->overlays_before
;
3440 current_buffer
->overlays_before
= before_list
;
3442 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3446 afterp
->next
= current_buffer
->overlays_after
;
3447 current_buffer
->overlays_after
= after_list
;
3449 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3452 /* We have two types of overlay: the one whose ending marker is
3453 after-insertion-marker (this is the usual case) and the one whose
3454 ending marker is before-insertion-marker. When `overlays_before'
3455 contains overlays of the latter type and the former type in this
3456 order and both overlays end at inserting position, inserting a text
3457 increases only the ending marker of the latter type, which results
3458 in incorrect ordering of `overlays_before'.
3460 This function fixes ordering of overlays in the slot
3461 `overlays_before' of the buffer *BP. Before the insertion, `point'
3462 was at PREV, and now is at POS. */
3465 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3467 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3468 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3470 ptrdiff_t end
IF_LINT (= 0);
3472 /* After the insertion, the several overlays may be in incorrect
3473 order. The possibility is that, in the list `overlays_before',
3474 an overlay which ends at POS appears after an overlay which ends
3475 at PREV. Since POS is greater than PREV, we must fix the
3476 ordering of these overlays, by moving overlays ends at POS before
3477 the overlays ends at PREV. */
3479 /* At first, find a place where disordered overlays should be linked
3480 in. It is where an overlay which end before POS exists. (i.e. an
3481 overlay whose ending marker is after-insertion-marker if disorder
3484 && (XSETMISC (tem
, tail
),
3485 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3491 /* If we don't find such an overlay,
3492 or the found one ends before PREV,
3493 or the found one is the last one in the list,
3494 we don't have to fix anything. */
3495 if (!tail
|| end
< prev
|| !tail
->next
)
3498 right_pair
= parent
;
3502 /* Now, end position of overlays in the list TAIL should be before
3503 or equal to PREV. In the loop, an overlay which ends at POS is
3504 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3505 we found an overlay which ends before PREV, the remaining
3506 overlays are in correct order. */
3509 XSETMISC (tem
, tail
);
3510 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3513 { /* This overlay is disordered. */
3514 struct Lisp_Overlay
*found
= tail
;
3516 /* Unlink the found overlay. */
3518 parent
->next
= tail
;
3519 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3520 and link it into the right place. */
3523 found
->next
= bp
->overlays_before
;
3524 bp
->overlays_before
= found
;
3528 found
->next
= right_pair
->next
;
3529 right_pair
->next
= found
;
3532 else if (end
== prev
)
3537 else /* No more disordered overlay. */
3542 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3543 doc
: /* Return t if OBJECT is an overlay. */)
3544 (Lisp_Object object
)
3546 return (OVERLAYP (object
) ? Qt
: Qnil
);
3549 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3550 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3551 If omitted, BUFFER defaults to the current buffer.
3552 BEG and END may be integers or markers.
3553 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3554 for the front of the overlay advance when text is inserted there
3555 \(which means the text *is not* included in the overlay).
3556 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3557 for the rear of the overlay advance when text is inserted there
3558 \(which means the text *is* included in the overlay). */)
3559 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3561 Lisp_Object overlay
;
3565 XSETBUFFER (buffer
, current_buffer
);
3567 CHECK_BUFFER (buffer
);
3569 && ! EQ (Fmarker_buffer (beg
), buffer
))
3570 error ("Marker points into wrong buffer");
3572 && ! EQ (Fmarker_buffer (end
), buffer
))
3573 error ("Marker points into wrong buffer");
3575 CHECK_NUMBER_COERCE_MARKER (beg
);
3576 CHECK_NUMBER_COERCE_MARKER (end
);
3578 if (XINT (beg
) > XINT (end
))
3581 temp
= beg
; beg
= end
; end
= temp
;
3584 b
= XBUFFER (buffer
);
3586 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3587 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3589 if (!NILP (front_advance
))
3590 XMARKER (beg
)->insertion_type
= 1;
3591 if (!NILP (rear_advance
))
3592 XMARKER (end
)->insertion_type
= 1;
3594 overlay
= allocate_misc ();
3595 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3596 XOVERLAY (overlay
)->start
= beg
;
3597 XOVERLAY (overlay
)->end
= end
;
3598 XOVERLAY (overlay
)->plist
= Qnil
;
3599 XOVERLAY (overlay
)->next
= NULL
;
3601 /* Put the new overlay on the wrong list. */
3602 end
= OVERLAY_END (overlay
);
3603 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3605 if (b
->overlays_after
)
3606 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3607 b
->overlays_after
= XOVERLAY (overlay
);
3611 if (b
->overlays_before
)
3612 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3613 b
->overlays_before
= XOVERLAY (overlay
);
3616 /* This puts it in the right list, and in the right order. */
3617 recenter_overlay_lists (b
, b
->overlay_center
);
3619 /* We don't need to redisplay the region covered by the overlay, because
3620 the overlay has no properties at the moment. */
3625 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3628 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3632 ptrdiff_t temp
= start
;
3637 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3639 /* If this is a buffer not in the selected window,
3640 we must do other windows. */
3641 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3642 windows_or_buffers_changed
= 1;
3643 /* If multiple windows show this buffer, we must do other windows. */
3644 else if (buffer_shared
> 1)
3645 windows_or_buffers_changed
= 1;
3646 /* If we modify an overlay at the end of the buffer, we cannot
3647 be sure that window end is still valid. */
3648 else if (end
>= ZV
&& start
<= ZV
)
3649 windows_or_buffers_changed
= 1;
3651 ++BUF_OVERLAY_MODIFF (buf
);
3655 static struct Lisp_Overlay
*
3656 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3658 struct Lisp_Overlay
*tmp
, *prev
;
3659 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3663 prev
->next
= tmp
->next
;
3666 overlay
->next
= NULL
;
3672 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3673 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3674 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3675 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3677 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3679 struct buffer
*b
, *ob
= 0;
3680 Lisp_Object obuffer
;
3681 ptrdiff_t count
= SPECPDL_INDEX ();
3682 ptrdiff_t n_beg
, n_end
, o_beg
IF_LINT (= 0), o_end
IF_LINT (= 0);
3684 CHECK_OVERLAY (overlay
);
3686 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3688 XSETBUFFER (buffer
, current_buffer
);
3689 CHECK_BUFFER (buffer
);
3691 if (NILP (Fbuffer_live_p (buffer
)))
3692 error ("Attempt to move overlay to a dead buffer");
3695 && ! EQ (Fmarker_buffer (beg
), buffer
))
3696 error ("Marker points into wrong buffer");
3698 && ! EQ (Fmarker_buffer (end
), buffer
))
3699 error ("Marker points into wrong buffer");
3701 CHECK_NUMBER_COERCE_MARKER (beg
);
3702 CHECK_NUMBER_COERCE_MARKER (end
);
3704 if (XINT (beg
) > XINT (end
))
3707 temp
= beg
; beg
= end
; end
= temp
;
3710 specbind (Qinhibit_quit
, Qt
);
3712 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3713 b
= XBUFFER (buffer
);
3715 if (!NILP (obuffer
))
3717 ob
= XBUFFER (obuffer
);
3719 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3720 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3722 ob
->overlays_before
=
3723 unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3724 ob
->overlays_after
=
3725 unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3726 eassert (XOVERLAY (overlay
)->next
== NULL
);
3729 /* Set the overlay boundaries, which may clip them. */
3730 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3731 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3733 n_beg
= marker_position (OVERLAY_START (overlay
));
3734 n_end
= marker_position (OVERLAY_END (overlay
));
3736 /* If the overlay has changed buffers, do a thorough redisplay. */
3737 if (!EQ (buffer
, obuffer
))
3739 /* Redisplay where the overlay was. */
3741 modify_overlay (ob
, o_beg
, o_end
);
3743 /* Redisplay where the overlay is going to be. */
3744 modify_overlay (b
, n_beg
, n_end
);
3747 /* Redisplay the area the overlay has just left, or just enclosed. */
3750 modify_overlay (b
, o_end
, n_end
);
3751 else if (o_end
== n_end
)
3752 modify_overlay (b
, o_beg
, n_beg
);
3754 modify_overlay (b
, min (o_beg
, n_beg
), max (o_end
, n_end
));
3757 /* Delete the overlay if it is empty after clipping and has the
3758 evaporate property. */
3759 if (n_beg
== n_end
&& !NILP (Foverlay_get (overlay
, Qevaporate
)))
3760 return unbind_to (count
, Fdelete_overlay (overlay
));
3762 /* Put the overlay into the new buffer's overlay lists, first on the
3764 if (n_end
< b
->overlay_center
)
3766 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3767 b
->overlays_after
= XOVERLAY (overlay
);
3771 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3772 b
->overlays_before
= XOVERLAY (overlay
);
3775 /* This puts it in the right list, and in the right order. */
3776 recenter_overlay_lists (b
, b
->overlay_center
);
3778 return unbind_to (count
, overlay
);
3781 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3782 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3783 (Lisp_Object overlay
)
3787 ptrdiff_t count
= SPECPDL_INDEX ();
3789 CHECK_OVERLAY (overlay
);
3791 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3795 b
= XBUFFER (buffer
);
3796 specbind (Qinhibit_quit
, Qt
);
3799 = unchain_overlay (b
->overlays_before
, XOVERLAY (overlay
));
3801 = unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3802 eassert (XOVERLAY (overlay
)->next
== NULL
);
3805 marker_position (OVERLAY_START (overlay
)),
3806 marker_position (OVERLAY_END (overlay
)));
3807 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3808 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3810 /* When deleting an overlay with before or after strings, turn off
3811 display optimizations for the affected buffer, on the basis that
3812 these strings may contain newlines. This is easier to do than to
3813 check for that situation during redisplay. */
3814 if (!windows_or_buffers_changed
3815 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3816 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3817 b
->prevent_redisplay_optimizations_p
= 1;
3819 return unbind_to (count
, Qnil
);
3822 /* Overlay dissection functions. */
3824 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3825 doc
: /* Return the position at which OVERLAY starts. */)
3826 (Lisp_Object overlay
)
3828 CHECK_OVERLAY (overlay
);
3830 return (Fmarker_position (OVERLAY_START (overlay
)));
3833 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3834 doc
: /* Return the position at which OVERLAY ends. */)
3835 (Lisp_Object overlay
)
3837 CHECK_OVERLAY (overlay
);
3839 return (Fmarker_position (OVERLAY_END (overlay
)));
3842 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3843 doc
: /* Return the buffer OVERLAY belongs to.
3844 Return nil if OVERLAY has been deleted. */)
3845 (Lisp_Object overlay
)
3847 CHECK_OVERLAY (overlay
);
3849 return Fmarker_buffer (OVERLAY_START (overlay
));
3852 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3853 doc
: /* Return a list of the properties on OVERLAY.
3854 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3856 (Lisp_Object overlay
)
3858 CHECK_OVERLAY (overlay
);
3860 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3864 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3865 doc
: /* Return a list of the overlays that contain the character at POS. */)
3868 ptrdiff_t len
, noverlays
;
3869 Lisp_Object
*overlay_vec
;
3872 CHECK_NUMBER_COERCE_MARKER (pos
);
3875 /* We can't use alloca here because overlays_at can call xrealloc. */
3876 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3878 /* Put all the overlays we want in a vector in overlay_vec.
3879 Store the length in len. */
3880 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3883 /* Make a list of them all. */
3884 result
= Flist (noverlays
, overlay_vec
);
3886 xfree (overlay_vec
);
3890 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3891 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3892 Overlap means that at least one character is contained within the overlay
3893 and also contained within the specified region.
3894 Empty overlays are included in the result if they are located at BEG,
3895 between BEG and END, or at END provided END denotes the position at the
3896 end of the buffer. */)
3897 (Lisp_Object beg
, Lisp_Object end
)
3899 ptrdiff_t len
, noverlays
;
3900 Lisp_Object
*overlay_vec
;
3903 CHECK_NUMBER_COERCE_MARKER (beg
);
3904 CHECK_NUMBER_COERCE_MARKER (end
);
3907 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3909 /* Put all the overlays we want in a vector in overlay_vec.
3910 Store the length in len. */
3911 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3914 /* Make a list of them all. */
3915 result
= Flist (noverlays
, overlay_vec
);
3917 xfree (overlay_vec
);
3921 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3923 doc
: /* Return the next position after POS where an overlay starts or ends.
3924 If there are no overlay boundaries from POS to (point-max),
3925 the value is (point-max). */)
3928 ptrdiff_t i
, len
, noverlays
;
3930 Lisp_Object
*overlay_vec
;
3932 CHECK_NUMBER_COERCE_MARKER (pos
);
3935 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3937 /* Put all the overlays we want in a vector in overlay_vec.
3938 Store the length in len.
3939 endpos gets the position where the next overlay starts. */
3940 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3943 /* If any of these overlays ends before endpos,
3944 use its ending point instead. */
3945 for (i
= 0; i
< noverlays
; i
++)
3950 oend
= OVERLAY_END (overlay_vec
[i
]);
3951 oendpos
= OVERLAY_POSITION (oend
);
3952 if (oendpos
< endpos
)
3956 xfree (overlay_vec
);
3957 return make_number (endpos
);
3960 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3961 Sprevious_overlay_change
, 1, 1, 0,
3962 doc
: /* Return the previous position before POS where an overlay starts or ends.
3963 If there are no overlay boundaries from (point-min) to POS,
3964 the value is (point-min). */)
3968 Lisp_Object
*overlay_vec
;
3971 CHECK_NUMBER_COERCE_MARKER (pos
);
3973 /* At beginning of buffer, we know the answer;
3974 avoid bug subtracting 1 below. */
3975 if (XINT (pos
) == BEGV
)
3979 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3981 /* Put all the overlays we want in a vector in overlay_vec.
3982 Store the length in len.
3983 prevpos gets the position of the previous change. */
3984 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3987 xfree (overlay_vec
);
3988 return make_number (prevpos
);
3991 /* These functions are for debugging overlays. */
3993 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3994 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3995 The car has all the overlays before the overlay center;
3996 the cdr has all the overlays after the overlay center.
3997 Recentering overlays moves overlays between these lists.
3998 The lists you get are copies, so that changing them has no effect.
3999 However, the overlays you get are the real objects that the buffer uses. */)
4002 struct Lisp_Overlay
*ol
;
4003 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4004 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4007 before
= Fcons (tmp
, before
);
4009 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4012 after
= Fcons (tmp
, after
);
4014 return Fcons (Fnreverse (before
), Fnreverse (after
));
4017 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4018 doc
: /* Recenter the overlays of the current buffer around position POS.
4019 That makes overlay lookup faster for positions near POS (but perhaps slower
4020 for positions far away from POS). */)
4024 CHECK_NUMBER_COERCE_MARKER (pos
);
4026 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4027 recenter_overlay_lists (current_buffer
, p
);
4031 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4032 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4033 (Lisp_Object overlay
, Lisp_Object prop
)
4035 CHECK_OVERLAY (overlay
);
4036 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4039 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4040 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4041 VALUE will be returned.*/)
4042 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4044 Lisp_Object tail
, buffer
;
4047 CHECK_OVERLAY (overlay
);
4049 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4051 for (tail
= XOVERLAY (overlay
)->plist
;
4052 CONSP (tail
) && CONSP (XCDR (tail
));
4053 tail
= XCDR (XCDR (tail
)))
4054 if (EQ (XCAR (tail
), prop
))
4056 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4057 XSETCAR (XCDR (tail
), value
);
4060 /* It wasn't in the list, so add it to the front. */
4061 changed
= !NILP (value
);
4062 XOVERLAY (overlay
)->plist
4063 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4065 if (! NILP (buffer
))
4068 modify_overlay (XBUFFER (buffer
),
4069 marker_position (OVERLAY_START (overlay
)),
4070 marker_position (OVERLAY_END (overlay
)));
4071 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4072 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4073 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4074 Fdelete_overlay (overlay
);
4080 /* Subroutine of report_overlay_modification. */
4082 /* Lisp vector holding overlay hook functions to call.
4083 Vector elements come in pairs.
4084 Each even-index element is a list of hook functions.
4085 The following odd-index element is the overlay they came from.
4087 Before the buffer change, we fill in this vector
4088 as we call overlay hook functions.
4089 After the buffer change, we get the functions to call from this vector.
4090 This way we always call the same functions before and after the change. */
4091 static Lisp_Object last_overlay_modification_hooks
;
4093 /* Number of elements actually used in last_overlay_modification_hooks. */
4094 static ptrdiff_t last_overlay_modification_hooks_used
;
4096 /* Add one functionlist/overlay pair
4097 to the end of last_overlay_modification_hooks. */
4100 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4102 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4104 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4105 last_overlay_modification_hooks
=
4106 larger_vector (last_overlay_modification_hooks
, 2, -1);
4107 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4108 functionlist
); last_overlay_modification_hooks_used
++;
4109 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4110 overlay
); last_overlay_modification_hooks_used
++;
4113 /* Run the modification-hooks of overlays that include
4114 any part of the text in START to END.
4115 If this change is an insertion, also
4116 run the insert-before-hooks of overlay starting at END,
4117 and the insert-after-hooks of overlay ending at START.
4119 This is called both before and after the modification.
4120 AFTER is nonzero when we call after the modification.
4122 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4123 When AFTER is nonzero, they are the start position,
4124 the position after the inserted new text,
4125 and the length of deleted or replaced old text. */
4128 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4129 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4131 Lisp_Object prop
, overlay
;
4132 struct Lisp_Overlay
*tail
;
4133 /* 1 if this change is an insertion. */
4134 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4135 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4140 /* We used to run the functions as soon as we found them and only register
4141 them in last_overlay_modification_hooks for the purpose of the `after'
4142 case. But running elisp code as we traverse the list of overlays is
4143 painful because the list can be modified by the elisp code so we had to
4144 copy at several places. We now simply do a read-only traversal that
4145 only collects the functions to run and we run them afterwards. It's
4146 simpler, especially since all the code was already there. -stef */
4150 /* We are being called before a change.
4151 Scan the overlays to find the functions to call. */
4152 last_overlay_modification_hooks_used
= 0;
4153 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4155 ptrdiff_t startpos
, endpos
;
4156 Lisp_Object ostart
, oend
;
4158 XSETMISC (overlay
, tail
);
4160 ostart
= OVERLAY_START (overlay
);
4161 oend
= OVERLAY_END (overlay
);
4162 endpos
= OVERLAY_POSITION (oend
);
4163 if (XFASTINT (start
) > endpos
)
4165 startpos
= OVERLAY_POSITION (ostart
);
4166 if (insertion
&& (XFASTINT (start
) == startpos
4167 || XFASTINT (end
) == startpos
))
4169 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4171 add_overlay_mod_hooklist (prop
, overlay
);
4173 if (insertion
&& (XFASTINT (start
) == endpos
4174 || XFASTINT (end
) == endpos
))
4176 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4178 add_overlay_mod_hooklist (prop
, overlay
);
4180 /* Test for intersecting intervals. This does the right thing
4181 for both insertion and deletion. */
4182 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4184 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4186 add_overlay_mod_hooklist (prop
, overlay
);
4190 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4192 ptrdiff_t startpos
, endpos
;
4193 Lisp_Object ostart
, oend
;
4195 XSETMISC (overlay
, tail
);
4197 ostart
= OVERLAY_START (overlay
);
4198 oend
= OVERLAY_END (overlay
);
4199 startpos
= OVERLAY_POSITION (ostart
);
4200 endpos
= OVERLAY_POSITION (oend
);
4201 if (XFASTINT (end
) < startpos
)
4203 if (insertion
&& (XFASTINT (start
) == startpos
4204 || XFASTINT (end
) == startpos
))
4206 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4208 add_overlay_mod_hooklist (prop
, overlay
);
4210 if (insertion
&& (XFASTINT (start
) == endpos
4211 || XFASTINT (end
) == endpos
))
4213 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4215 add_overlay_mod_hooklist (prop
, overlay
);
4217 /* Test for intersecting intervals. This does the right thing
4218 for both insertion and deletion. */
4219 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4221 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4223 add_overlay_mod_hooklist (prop
, overlay
);
4228 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4230 /* Call the functions recorded in last_overlay_modification_hooks.
4231 First copy the vector contents, in case some of these hooks
4232 do subsequent modification of the buffer. */
4233 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4234 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4237 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4238 size
* sizeof (Lisp_Object
));
4240 gcpro1
.nvars
= size
;
4242 for (i
= 0; i
< size
;)
4244 Lisp_Object prop_i
, overlay_i
;
4246 overlay_i
= copy
[i
++];
4247 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4254 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4255 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4257 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4259 GCPRO4 (list
, arg1
, arg2
, arg3
);
4261 while (CONSP (list
))
4264 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4266 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4272 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4275 evaporate_overlays (ptrdiff_t pos
)
4277 Lisp_Object overlay
, hit_list
;
4278 struct Lisp_Overlay
*tail
;
4281 if (pos
<= current_buffer
->overlay_center
)
4282 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4285 XSETMISC (overlay
, tail
);
4286 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4289 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4290 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4291 hit_list
= Fcons (overlay
, hit_list
);
4294 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4297 XSETMISC (overlay
, tail
);
4298 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4301 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4302 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4303 hit_list
= Fcons (overlay
, hit_list
);
4305 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4306 Fdelete_overlay (XCAR (hit_list
));
4309 /* Somebody has tried to store a value with an unacceptable type
4310 in the slot with offset OFFSET. */
4313 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4315 Lisp_Object predicate
;
4319 case_Lisp_Int
: predicate
= Qintegerp
; break;
4320 case Lisp_String
: predicate
= Qstringp
; break;
4321 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4325 wrong_type_argument (predicate
, newval
);
4329 /***********************************************************************
4330 Allocation with mmap
4331 ***********************************************************************/
4333 #ifdef USE_MMAP_FOR_BUFFERS
4335 #include <sys/types.h>
4336 #include <sys/mman.h>
4339 #ifdef MAP_ANONYMOUS
4340 #define MAP_ANON MAP_ANONYMOUS
4347 #define MAP_FAILED ((void *) -1)
4359 /* Memory is allocated in regions which are mapped using mmap(2).
4360 The current implementation lets the system select mapped
4361 addresses; we're not using MAP_FIXED in general, except when
4362 trying to enlarge regions.
4364 Each mapped region starts with a mmap_region structure, the user
4365 area starts after that structure, aligned to MEM_ALIGN.
4367 +-----------------------+
4368 | struct mmap_info + |
4370 +-----------------------+
4374 +-----------------------+ */
4378 /* User-specified size. */
4379 size_t nbytes_specified
;
4381 /* Number of bytes mapped */
4382 size_t nbytes_mapped
;
4384 /* Pointer to the location holding the address of the memory
4385 allocated with the mmap'd block. The variable actually points
4386 after this structure. */
4389 /* Next and previous in list of all mmap'd regions. */
4390 struct mmap_region
*next
, *prev
;
4393 /* Doubly-linked list of mmap'd regions. */
4395 static struct mmap_region
*mmap_regions
;
4397 /* File descriptor for mmap. If we don't have anonymous mapping,
4398 /dev/zero will be opened on it. */
4402 /* Temporary storage for mmap_set_vars, see there. */
4404 static struct mmap_region
*mmap_regions_1
;
4405 static int mmap_fd_1
;
4407 /* Page size on this system. */
4409 static int mmap_page_size
;
4411 /* 1 means mmap has been initialized. */
4413 static int mmap_initialized_p
;
4415 /* Value is X rounded up to the next multiple of N. */
4417 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4419 /* Size of mmap_region structure plus padding. */
4421 #define MMAP_REGION_STRUCT_SIZE \
4422 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4424 /* Given a pointer P to the start of the user-visible part of a mapped
4425 region, return a pointer to the start of the region. */
4427 #define MMAP_REGION(P) \
4428 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4430 /* Given a pointer P to the start of a mapped region, return a pointer
4431 to the start of the user-visible part of the region. */
4433 #define MMAP_USER_AREA(P) \
4434 ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4436 #define MEM_ALIGN sizeof (double)
4438 /* Predicate returning true if part of the address range [START .. END]
4439 is currently mapped. Used to prevent overwriting an existing
4442 Default is to conservatively assume the address range is occupied by
4443 something else. This can be overridden by system configuration
4444 files if system-specific means to determine this exists. */
4446 #ifndef MMAP_ALLOCATED_P
4447 #define MMAP_ALLOCATED_P(start, end) 1
4450 /* Perform necessary initializations for the use of mmap. */
4456 /* The value of mmap_fd is initially 0 in temacs, and -1
4457 in a dumped Emacs. */
4460 /* No anonymous mmap -- we need the file descriptor. */
4461 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4463 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4465 #endif /* MAP_ANON == 0 */
4467 if (mmap_initialized_p
)
4469 mmap_initialized_p
= 1;
4475 mmap_page_size
= getpagesize ();
4478 /* Return a region overlapping address range START...END, or null if
4479 none. END is not including, i.e. the last byte in the range
4482 static struct mmap_region
*
4483 mmap_find (void *start
, void *end
)
4485 struct mmap_region
*r
;
4486 char *s
= (char *) start
, *e
= (char *) end
;
4488 for (r
= mmap_regions
; r
; r
= r
->next
)
4490 char *rstart
= (char *) r
;
4491 char *rend
= rstart
+ r
->nbytes_mapped
;
4493 if (/* First byte of range, i.e. START, in this region? */
4494 (s
>= rstart
&& s
< rend
)
4495 /* Last byte of range, i.e. END - 1, in this region? */
4496 || (e
> rstart
&& e
<= rend
)
4497 /* First byte of this region in the range? */
4498 || (rstart
>= s
&& rstart
< e
)
4499 /* Last byte of this region in the range? */
4500 || (rend
> s
&& rend
<= e
))
4508 /* Unmap a region. P is a pointer to the start of the user-araa of
4509 the region. Value is non-zero if successful. */
4512 mmap_free_1 (struct mmap_region
*r
)
4515 r
->next
->prev
= r
->prev
;
4517 r
->prev
->next
= r
->next
;
4519 mmap_regions
= r
->next
;
4521 if (munmap (r
, r
->nbytes_mapped
) == -1)
4523 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4531 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4532 Value is non-zero if successful. */
4535 mmap_enlarge (struct mmap_region
*r
, int npages
)
4537 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4543 /* Unmap pages at the end of the region. */
4544 nbytes
= - npages
* mmap_page_size
;
4545 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4546 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4549 r
->nbytes_mapped
-= nbytes
;
4553 else if (npages
> 0)
4555 nbytes
= npages
* mmap_page_size
;
4557 /* Try to map additional pages at the end of the region. We
4558 cannot do this if the address range is already occupied by
4559 something else because mmap deletes any previous mapping.
4560 I'm not sure this is worth doing, let's see. */
4561 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4565 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4566 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4567 if (p
== MAP_FAILED
)
4568 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4569 else if (p
!= region_end
)
4571 /* Kernels are free to choose a different address. In
4572 that case, unmap what we've mapped above; we have
4574 if (munmap (p
, nbytes
) == -1)
4575 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4579 r
->nbytes_mapped
+= nbytes
;
4589 /* Set or reset variables holding references to mapped regions. If
4590 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4591 non-zero, set all variables to the start of the user-areas
4594 This function is called from Fdump_emacs to ensure that the dumped
4595 Emacs doesn't contain references to memory that won't be mapped
4596 when Emacs starts. */
4599 mmap_set_vars (int restore_p
)
4601 struct mmap_region
*r
;
4605 mmap_regions
= mmap_regions_1
;
4606 mmap_fd
= mmap_fd_1
;
4607 for (r
= mmap_regions
; r
; r
= r
->next
)
4608 *r
->var
= MMAP_USER_AREA (r
);
4612 for (r
= mmap_regions
; r
; r
= r
->next
)
4614 mmap_regions_1
= mmap_regions
;
4615 mmap_regions
= NULL
;
4616 mmap_fd_1
= mmap_fd
;
4622 /* Allocate a block of storage large enough to hold NBYTES bytes of
4623 data. A pointer to the data is returned in *VAR. VAR is thus the
4624 address of some variable which will use the data area.
4626 The allocation of 0 bytes is valid.
4628 If we can't allocate the necessary memory, set *VAR to null, and
4632 mmap_alloc (void **var
, size_t nbytes
)
4639 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4640 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4643 if (p
== MAP_FAILED
)
4645 if (errno
!= ENOMEM
)
4646 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4651 struct mmap_region
*r
= (struct mmap_region
*) p
;
4653 r
->nbytes_specified
= nbytes
;
4654 r
->nbytes_mapped
= map
;
4657 r
->next
= mmap_regions
;
4662 p
= MMAP_USER_AREA (p
);
4669 /* Free a block of relocatable storage whose data is pointed to by
4670 PTR. Store 0 in *PTR to show there's no block allocated. */
4673 mmap_free (void **var
)
4679 mmap_free_1 (MMAP_REGION (*var
));
4685 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4686 resize it to size NBYTES. Change *VAR to reflect the new block,
4687 and return this value. If more memory cannot be allocated, then
4688 leave *VAR unchanged, and return null. */
4691 mmap_realloc (void **var
, size_t nbytes
)
4698 result
= mmap_alloc (var
, nbytes
);
4699 else if (nbytes
== 0)
4702 result
= mmap_alloc (var
, nbytes
);
4706 struct mmap_region
*r
= MMAP_REGION (*var
);
4707 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4712 void *old_ptr
= *var
;
4714 /* Try to map additional pages at the end of the region.
4715 If that fails, allocate a new region, copy data
4716 from the old region, then free it. */
4717 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4720 r
->nbytes_specified
= nbytes
;
4721 *var
= result
= old_ptr
;
4723 else if (mmap_alloc (var
, nbytes
))
4725 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4726 mmap_free_1 (MMAP_REGION (old_ptr
));
4728 r
= MMAP_REGION (result
);
4729 r
->nbytes_specified
= nbytes
;
4737 else if (room
- nbytes
>= mmap_page_size
)
4739 /* Shrinking by at least a page. Let's give some
4740 memory back to the system.
4742 The extra parens are to make the division happens first,
4743 on positive values, so we know it will round towards
4745 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4747 r
->nbytes_specified
= nbytes
;
4751 /* Leave it alone. */
4753 r
->nbytes_specified
= nbytes
;
4761 #endif /* USE_MMAP_FOR_BUFFERS */
4765 /***********************************************************************
4766 Buffer-text Allocation
4767 ***********************************************************************/
4769 /* Allocate NBYTES bytes for buffer B's text buffer. */
4772 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4777 #if defined USE_MMAP_FOR_BUFFERS
4778 p
= mmap_alloc ((void **) &b
->text
->beg
, nbytes
);
4779 #elif defined REL_ALLOC
4780 p
= r_alloc ((void **) &b
->text
->beg
, nbytes
);
4782 p
= xmalloc (nbytes
);
4788 memory_full (nbytes
);
4791 b
->text
->beg
= (unsigned char *) p
;
4795 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4799 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4802 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4805 #if defined USE_MMAP_FOR_BUFFERS
4806 p
= mmap_realloc ((void **) &b
->text
->beg
, nbytes
);
4807 #elif defined REL_ALLOC
4808 p
= r_re_alloc ((void **) &b
->text
->beg
, nbytes
);
4810 p
= xrealloc (b
->text
->beg
, nbytes
);
4816 memory_full (nbytes
);
4819 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4824 /* Free buffer B's text buffer. */
4827 free_buffer_text (struct buffer
*b
)
4831 #if defined USE_MMAP_FOR_BUFFERS
4832 mmap_free ((void **) &b
->text
->beg
);
4833 #elif defined REL_ALLOC
4834 r_alloc_free ((void **) &b
->text
->beg
);
4836 xfree (b
->text
->beg
);
4839 BUF_BEG_ADDR (b
) = NULL
;
4845 /***********************************************************************
4847 ***********************************************************************/
4850 init_buffer_once (void)
4854 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4856 /* Make sure all markable slots in buffer_defaults
4857 are initialized reasonably, so mark_buffer won't choke. */
4858 reset_buffer (&buffer_defaults
);
4859 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4860 reset_buffer_local_variables (&buffer_defaults
, 1);
4861 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4862 reset_buffer (&buffer_local_symbols
);
4863 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4864 /* Prevent GC from getting confused. */
4865 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4866 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4867 BUF_INTERVALS (&buffer_defaults
) = 0;
4868 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4869 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, 0);
4870 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4871 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, 0);
4872 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4874 /* Set up the default values of various buffer slots. */
4875 /* Must do these before making the first buffer! */
4877 /* real setup is done in bindings.el */
4878 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4879 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4880 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4881 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4882 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4883 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4884 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4886 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4888 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4889 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4890 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4891 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4892 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4893 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4894 buffer_defaults
.overlays_before
= NULL
;
4895 buffer_defaults
.overlays_after
= NULL
;
4896 buffer_defaults
.overlay_center
= BEG
;
4898 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4899 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4900 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4901 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4902 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4903 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4904 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4905 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4906 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4908 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4909 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4910 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4911 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4912 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4913 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4914 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4915 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4916 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4917 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4918 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4919 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4920 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4921 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4922 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4923 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4924 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4925 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4926 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4927 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4928 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4930 /* Assign the local-flags to the slots that have default values.
4931 The local flag is a bit that is used in the buffer
4932 to say that it has its own local value for the slot.
4933 The local flag bits are in the local_var_flags slot of the buffer. */
4935 /* Nothing can work if this isn't true */
4936 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4938 /* 0 means not a lisp var, -1 means always local, else mask */
4939 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4940 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4941 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4942 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4943 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4944 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4945 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4946 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4947 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4948 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4949 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4950 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4951 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4952 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4953 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4954 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4955 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4956 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4957 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4960 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4961 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4962 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4963 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4964 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4965 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4967 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4969 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4970 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4971 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4972 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4973 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4974 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4975 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
4976 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
4977 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
4978 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
4979 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
4980 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
4981 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
4982 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
4983 /* Make this one a permanent local. */
4984 buffer_permanent_local_flags
[idx
++] = 1;
4985 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
4986 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
4988 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
4990 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
4992 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
4994 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
4995 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5000 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5001 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5003 /* Need more room? */
5004 if (idx
>= MAX_PER_BUFFER_VARS
)
5006 last_per_buffer_idx
= idx
;
5008 Vbuffer_alist
= Qnil
;
5012 QSFundamental
= make_pure_c_string ("Fundamental");
5014 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5015 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5017 Qmode_class
= intern_c_string ("mode-class");
5019 Qprotected_field
= intern_c_string ("protected-field");
5021 Qpermanent_local
= intern_c_string ("permanent-local");
5023 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5024 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5026 /* super-magic invisible buffer */
5027 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5028 Vbuffer_alist
= Qnil
;
5030 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5032 inhibit_modification_hooks
= 0;
5042 #ifdef USE_MMAP_FOR_BUFFERS
5044 /* When using the ralloc implementation based on mmap(2), buffer
5045 text pointers will have been set to null in the dumped Emacs.
5049 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5050 if (b
->text
->beg
== NULL
)
5051 enlarge_buffer_text (b
, 0);
5053 #endif /* USE_MMAP_FOR_BUFFERS */
5055 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5056 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5057 Fset_buffer_multibyte (Qnil
);
5059 pwd
= get_current_dir_name ();
5062 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5064 /* Maybe this should really use some standard subroutine
5065 whose definition is filename syntax dependent. */
5067 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5069 /* Grow buffer to add directory separator and '\0'. */
5070 pwd
= (char *) realloc (pwd
, len
+ 2);
5072 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5073 pwd
[len
] = DIRECTORY_SEP
;
5074 pwd
[len
+ 1] = '\0';
5077 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5078 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5079 /* At this moment, we still don't know how to decode the
5080 directory name. So, we keep the bytes in multibyte form so
5081 that ENCODE_FILE correctly gets the original bytes. */
5082 BVAR (current_buffer
, directory
)
5083 = string_to_multibyte (BVAR (current_buffer
, directory
));
5085 /* Add /: to the front of the name
5086 if it would otherwise be treated as magic. */
5087 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5089 /* If the default dir is just /, TEMP is non-nil
5090 because of the ange-ftp completion handler.
5091 However, it is not necessary to turn / into /:/.
5092 So avoid doing that. */
5093 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5094 BVAR (current_buffer
, directory
)
5095 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5097 temp
= get_minibuffer (0);
5098 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5103 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5104 Object stored in the current buffer. address is the address of the slot
5105 in the buffer that is current now. */
5107 /* TYPE is nil for a general Lisp variable.
5108 An integer specifies a type; then only Lisp values
5109 with that type code are allowed (except that nil is allowed too).
5110 LNAME is the Lisp-level variable name.
5111 VNAME is the name of the buffer slot.
5112 DOC is a dummy where you write the doc string as a comment. */
5113 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5115 static struct Lisp_Buffer_Objfwd bo_fwd; \
5116 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5120 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5121 Lisp_Object
*address
, Lisp_Object type
)
5123 struct Lisp_Symbol
*sym
;
5126 sym
= XSYMBOL (intern (namestring
));
5127 offset
= (char *)address
- (char *)current_buffer
;
5129 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5130 bo_fwd
->offset
= offset
;
5131 bo_fwd
->slottype
= type
;
5132 sym
->declared_special
= 1;
5133 sym
->redirect
= SYMBOL_FORWARDED
;
5135 /* I tried to do the job without a cast, but it seems impossible.
5136 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5137 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5139 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5141 if (PER_BUFFER_IDX (offset
) == 0)
5142 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5143 slot of buffer_local_flags */
5148 /* initialize the buffer routines */
5150 syms_of_buffer (void)
5152 staticpro (&last_overlay_modification_hooks
);
5153 last_overlay_modification_hooks
5154 = Fmake_vector (make_number (10), Qnil
);
5156 staticpro (&Vbuffer_defaults
);
5157 staticpro (&Vbuffer_local_symbols
);
5158 staticpro (&Qfundamental_mode
);
5159 staticpro (&Qmode_class
);
5160 staticpro (&QSFundamental
);
5161 staticpro (&Vbuffer_alist
);
5162 staticpro (&Qprotected_field
);
5163 staticpro (&Qpermanent_local
);
5164 staticpro (&Qkill_buffer_hook
);
5166 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5167 DEFSYM (Qoverlayp
, "overlayp");
5168 DEFSYM (Qevaporate
, "evaporate");
5169 DEFSYM (Qmodification_hooks
, "modification-hooks");
5170 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5171 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5172 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5173 DEFSYM (Qpriority
, "priority");
5174 DEFSYM (Qbefore_string
, "before-string");
5175 DEFSYM (Qafter_string
, "after-string");
5176 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5177 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5178 DEFSYM (Qafter_change_functions
, "after-change-functions");
5179 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5181 Fput (Qprotected_field
, Qerror_conditions
,
5182 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5183 Fput (Qprotected_field
, Qerror_message
,
5184 make_pure_c_string ("Attempt to modify a protected field"));
5186 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5188 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5189 This is the same as (default-value 'mode-line-format). */);
5191 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5193 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5194 This is the same as (default-value 'header-line-format). */);
5196 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5197 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5198 This is the same as (default-value 'cursor-type). */);
5200 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5202 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5203 This is the same as (default-value 'line-spacing). */);
5205 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5206 cursor_in_non_selected_windows
,
5207 doc
: /* Default value of `cursor-in-non-selected-windows'.
5208 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5210 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5212 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5213 This is the same as (default-value 'abbrev-mode). */);
5215 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5217 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5218 This is the same as (default-value 'ctl-arrow). */);
5220 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5221 enable_multibyte_characters
,
5222 doc
: /* Default value of `enable-multibyte-characters' for buffers not overriding it.
5223 This is the same as (default-value 'enable-multibyte-characters). */);
5225 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5226 buffer_file_coding_system
,
5227 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5228 This is the same as (default-value 'buffer-file-coding-system). */);
5230 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5232 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5233 This is the same as (default-value 'truncate-lines). */);
5235 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5237 doc
: /* Default value of `fill-column' for buffers that do not override it.
5238 This is the same as (default-value 'fill-column). */);
5240 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5242 doc
: /* Default value of `left-margin' for buffers that do not override it.
5243 This is the same as (default-value 'left-margin). */);
5245 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5247 doc
: /* Default value of `tab-width' for buffers that do not override it.
5248 This is the same as (default-value 'tab-width). */);
5250 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5252 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5253 This is the same as (default-value 'case-fold-search). */);
5255 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5257 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5258 This is the same as (default-value 'left-margin-width). */);
5260 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5262 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5263 This is the same as (default-value 'right-margin-width). */);
5265 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5267 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5268 This is the same as (default-value 'left-fringe-width). */);
5270 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5272 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5273 This is the same as (default-value 'right-fringe-width). */);
5275 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5276 fringes_outside_margins
,
5277 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5278 This is the same as (default-value 'fringes-outside-margins). */);
5280 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5282 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5283 This is the same as (default-value 'scroll-bar-width). */);
5285 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5286 vertical_scroll_bar_type
,
5287 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5288 This is the same as (default-value 'vertical-scroll-bar). */);
5290 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5291 indicate_empty_lines
,
5292 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5293 This is the same as (default-value 'indicate-empty-lines). */);
5295 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5296 indicate_buffer_boundaries
,
5297 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5298 This is the same as (default-value 'indicate-buffer-boundaries). */);
5300 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5301 fringe_indicator_alist
,
5302 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5303 This is the same as (default-value 'fringe-indicator-alist'). */);
5305 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5306 fringe_cursor_alist
,
5307 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5308 This is the same as (default-value 'fringe-cursor-alist'). */);
5310 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5311 scroll_up_aggressively
,
5312 doc
: /* Default value of `scroll-up-aggressively'.
5313 This value applies in buffers that don't have their own local values.
5314 This is the same as (default-value 'scroll-up-aggressively). */);
5316 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5317 scroll_down_aggressively
,
5318 doc
: /* Default value of `scroll-down-aggressively'.
5319 This value applies in buffers that don't have their own local values.
5320 This is the same as (default-value 'scroll-down-aggressively). */);
5322 DEFVAR_PER_BUFFER ("header-line-format",
5323 &BVAR (current_buffer
, header_line_format
),
5325 doc
: /* Analogous to `mode-line-format', but controls the header line.
5326 The header line appears, optionally, at the top of a window;
5327 the mode line appears at the bottom. */);
5329 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5331 doc
: /* Template for displaying mode line for current buffer.
5332 Each buffer has its own value of this variable.
5333 Value may be nil, a string, a symbol or a list or cons cell.
5334 A value of nil means don't display a mode line.
5335 For a symbol, its value is used (but it is ignored if t or nil).
5336 A string appearing directly as the value of a symbol is processed verbatim
5337 in that the %-constructs below are not recognized.
5338 Note that unless the symbol is marked as a `risky-local-variable', all
5339 properties in any strings, as well as all :eval and :propertize forms
5340 in the value of that symbol will be ignored.
5341 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5342 is used as a mode line element. Be careful--FORM should not load any files,
5343 because that can cause an infinite recursion.
5344 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5345 with the specified properties PROPS applied.
5346 For a list whose car is a symbol, the symbol's value is taken,
5347 and if that is non-nil, the cadr of the list is processed recursively.
5348 Otherwise, the caddr of the list (if there is one) is processed.
5349 For a list whose car is a string or list, each element is processed
5350 recursively and the results are effectively concatenated.
5351 For a list whose car is an integer, the cdr of the list is processed
5352 and padded (if the number is positive) or truncated (if negative)
5353 to the width specified by that number.
5354 A string is printed verbatim in the mode line except for %-constructs:
5355 (%-constructs are allowed when the string is the entire mode-line-format
5356 or when it is found in a cons-cell or a list)
5357 %b -- print buffer name. %f -- print visited file name.
5358 %F -- print frame name.
5359 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5360 %& is like %*, but ignore read-only-ness.
5361 % means buffer is read-only and * means it is modified.
5362 For a modified read-only buffer, %* gives % and %+ gives *.
5363 %s -- print process status. %l -- print the current line number.
5364 %c -- print the current column number (this makes editing slower).
5365 To make the column number update correctly in all cases,
5366 `column-number-mode' must be non-nil.
5367 %i -- print the size of the buffer.
5368 %I -- like %i, but use k, M, G, etc., to abbreviate.
5369 %p -- print percent of buffer above top of window, or Top, Bot or All.
5370 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5371 or print Bottom or All.
5372 %n -- print Narrow if appropriate.
5373 %t -- visited file is text or binary (if OS supports this distinction).
5374 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5375 %Z -- like %z, but including the end-of-line format.
5376 %e -- print error message about full memory.
5377 %@ -- print @ or hyphen. @ means that default-directory is on a
5379 %[ -- print one [ for each recursive editing level. %] similar.
5380 %% -- print %. %- -- print infinitely many dashes.
5381 Decimal digits after the % specify field width to which to pad. */);
5383 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5384 doc
: /* Value of `major-mode' for new buffers. */);
5386 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5387 make_number (Lisp_Symbol
),
5388 doc
: /* Symbol for current buffer's major mode.
5389 The default value (normally `fundamental-mode') affects new buffers.
5390 A value of nil means to use the current buffer's major mode, provided
5391 it is not marked as "special".
5393 When a mode is used by default, `find-file' switches to it before it
5394 reads the contents into the buffer and before it finishes setting up
5395 the buffer. Thus, the mode and its hooks should not expect certain
5396 variables such as `buffer-read-only' and `buffer-file-coding-system'
5399 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5401 doc
: /* Pretty name of current buffer's major mode.
5402 Usually a string, but can use any of the constructs for `mode-line-format',
5404 Format with `format-mode-line' to produce a string value. */);
5406 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5407 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5409 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5410 doc
: /* Non-nil if Abbrev mode is enabled.
5411 Use the command `abbrev-mode' to change this variable. */);
5413 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5415 doc
: /* Non-nil if searches and matches should ignore case. */);
5417 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5418 make_number (LISP_INT_TAG
),
5419 doc
: /* Column beyond which automatic line-wrapping should happen.
5420 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5422 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5423 make_number (LISP_INT_TAG
),
5424 doc
: /* Column for the default `indent-line-function' to indent to.
5425 Linefeed indents to this column in Fundamental mode. */);
5427 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5428 make_number (LISP_INT_TAG
),
5429 doc
: /* Distance between tab stops (for display of tab characters), in columns.
5430 This should be an integer greater than zero. */);
5432 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5433 doc
: /* Non-nil means display control chars with uparrow.
5434 A value of nil means use backslash and octal digits.
5435 This variable does not apply to characters whose display is specified
5436 in the current display table (if there is one). */);
5438 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5439 &BVAR (current_buffer
, enable_multibyte_characters
),
5441 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5442 Otherwise they are regarded as unibyte. This affects the display,
5443 file I/O and the behavior of various editing commands.
5445 This variable is buffer-local but you cannot set it directly;
5446 use the function `set-buffer-multibyte' to change a buffer's representation.
5447 See also Info node `(elisp)Text Representations'. */);
5448 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5450 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5451 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5452 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5453 This variable applies to saving the buffer, and also to `write-region'
5454 and other functions that use `write-region'.
5455 It does not apply to sending output to subprocesses, however.
5457 If this is nil, the buffer is saved without any code conversion
5458 unless some coding system is specified in `file-coding-system-alist'
5459 for the buffer file.
5461 If the text to be saved cannot be encoded as specified by this variable,
5462 an alternative encoding is selected by `select-safe-coding-system', which see.
5464 The variable `coding-system-for-write', if non-nil, overrides this variable.
5466 This variable is never applied to a way of decoding a file while reading it. */);
5468 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5469 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5470 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5472 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5473 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5474 doc
: /* If non-nil, forces directionality of text paragraphs in the buffer.
5476 If this is nil (the default), the direction of each paragraph is
5477 determined by the first strong directional character of its text.
5478 The values of `right-to-left' and `left-to-right' override that.
5479 Any other value is treated as nil.
5481 This variable has no effect unless the buffer's value of
5482 \`bidi-display-reordering' is non-nil. */);
5484 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5485 doc
: /* Non-nil means do not display continuation lines.
5486 Instead, give each line of text just one screen line.
5488 Note that this is overridden by the variable
5489 `truncate-partial-width-windows' if that variable is non-nil
5490 and this buffer is not full-frame width.
5492 Minibuffers set this variable to nil. */);
5494 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5495 doc
: /* Non-nil means to use word-wrapping for continuation lines.
5496 When word-wrapping is on, continuation lines are wrapped at the space
5497 or tab character nearest to the right window edge.
5498 If nil, continuation lines are wrapped at the right screen edge.
5500 This variable has no effect if long lines are truncated (see
5501 `truncate-lines' and `truncate-partial-width-windows'). If you use
5502 word-wrapping, you might want to reduce the value of
5503 `truncate-partial-width-windows', since wrapping can make text readable
5504 in narrower windows. */);
5506 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5507 make_number (Lisp_String
),
5508 doc
: /* Name of default directory of current buffer. Should end with slash.
5509 To interactively change the default directory, use command `cd'. */);
5511 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5513 doc
: /* Function called (if non-nil) to perform auto-fill.
5514 It is called after self-inserting any character specified in
5515 the `auto-fill-chars' table.
5516 NOTE: This variable is not a hook;
5517 its value may not be a list of functions. */);
5519 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5520 make_number (Lisp_String
),
5521 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5523 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5524 make_number (Lisp_String
),
5525 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5526 The truename of a file is calculated by `file-truename'
5527 and then abbreviated with `abbreviate-file-name'. */);
5529 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5530 &BVAR (current_buffer
, auto_save_file_name
),
5531 make_number (Lisp_String
),
5532 doc
: /* Name of file for auto-saving current buffer.
5533 If it is nil, that means don't auto-save this buffer. */);
5535 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5536 doc
: /* Non-nil if this buffer is read-only. */);
5538 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5539 doc
: /* Non-nil if this buffer's file has been backed up.
5540 Backing up is done before the first time the file is saved. */);
5542 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5543 make_number (LISP_INT_TAG
),
5544 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5546 -1 means auto-saving turned off until next real save.
5548 If you set this to -2, that means don't turn off auto-saving in this buffer
5549 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5550 you probably should set this to -2 in that buffer. */);
5552 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5554 doc
: /* Non-nil enables selective display.
5555 An integer N as value means display only lines
5556 that start with less than N columns of space.
5557 A value of t means that the character ^M makes itself and
5558 all the rest of the line invisible; also, when saving the buffer
5559 in a file, save the ^M as a newline. */);
5562 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5563 &BVAR (current_buffer
, selective_display_ellipses
),
5565 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5568 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5569 doc
: /* Non-nil if self-insertion should replace existing text.
5570 The value should be one of `overwrite-mode-textual',
5571 `overwrite-mode-binary', or nil.
5572 If it is `overwrite-mode-textual', self-insertion still
5573 inserts at the end of a line, and inserts when point is before a tab,
5574 until the tab is filled in.
5575 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5577 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5579 doc
: /* Display table that controls display of the contents of current buffer.
5581 If this variable is nil, the value of `standard-display-table' is used.
5582 Each window can have its own, overriding display table, see
5583 `set-window-display-table' and `window-display-table'.
5585 The display table is a char-table created with `make-display-table'.
5586 A char-table is an array indexed by character codes. Normal array
5587 primitives `aref' and `aset' can be used to access elements of a char-table.
5589 Each of the char-table elements control how to display the corresponding
5590 text character: the element at index C in the table says how to display
5591 the character whose code is C. Each element should be a vector of
5592 characters or nil. The value nil means display the character in the
5593 default fashion; otherwise, the characters from the vector are delivered
5594 to the screen instead of the original character.
5596 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5597 to display a capital Y instead of each X character.
5599 In addition, a char-table has six extra slots to control the display of:
5601 the end of a truncated screen line (extra-slot 0, a single character);
5602 the end of a continued line (extra-slot 1, a single character);
5603 the escape character used to display character codes in octal
5604 (extra-slot 2, a single character);
5605 the character used as an arrow for control characters (extra-slot 3,
5606 a single character);
5607 the decoration indicating the presence of invisible lines (extra-slot 4,
5608 a vector of characters);
5609 the character used to draw the border between side-by-side windows
5610 (extra-slot 5, a single character).
5612 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5614 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5616 doc
: /* Width of left marginal area for display of a buffer.
5617 A value of nil means no marginal area. */);
5619 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5621 doc
: /* Width of right marginal area for display of a buffer.
5622 A value of nil means no marginal area. */);
5624 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5626 doc
: /* Width of this buffer's left fringe (in pixels).
5627 A value of 0 means no left fringe is shown in this buffer's window.
5628 A value of nil means to use the left fringe width from the window's frame. */);
5630 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5632 doc
: /* Width of this buffer's right fringe (in pixels).
5633 A value of 0 means no right fringe is shown in this buffer's window.
5634 A value of nil means to use the right fringe width from the window's frame. */);
5636 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5638 doc
: /* Non-nil means to display fringes outside display margins.
5639 A value of nil means to display fringes between margins and buffer text. */);
5641 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5643 doc
: /* Width of this buffer's scroll bars in pixels.
5644 A value of nil means to use the scroll bar width from the window's frame. */);
5646 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5648 doc
: /* Position of this buffer's vertical scroll bar.
5649 The value takes effect whenever you tell a window to display this buffer;
5650 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5652 A value of `left' or `right' means put the vertical scroll bar at that side
5653 of the window; a value of nil means don't show any vertical scroll bars.
5654 A value of t (the default) means do whatever the window's frame specifies. */);
5656 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5657 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5658 doc
: /* Visually indicate empty lines after the buffer end.
5659 If non-nil, a bitmap is displayed in the left fringe of a window on
5660 window-systems. */);
5662 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5663 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5664 doc
: /* Visually indicate buffer boundaries and scrolling.
5665 If non-nil, the first and last line of the buffer are marked in the fringe
5666 of a window on window-systems with angle bitmaps, or if the window can be
5667 scrolled, the top and bottom line of the window are marked with up and down
5670 If value is a symbol `left' or `right', both angle and arrow bitmaps
5671 are displayed in the left or right fringe, resp. Any other value
5672 that doesn't look like an alist means display the angle bitmaps in
5673 the left fringe but no arrows.
5675 You can exercise more precise control by using an alist as the
5676 value. Each alist element (INDICATOR . POSITION) specifies
5677 where to show one of the indicators. INDICATOR is one of `top',
5678 `bottom', `up', `down', or t, which specifies the default position,
5679 and POSITION is one of `left', `right', or nil, meaning do not show
5682 For example, ((top . left) (t . right)) places the top angle bitmap in
5683 left fringe, the bottom angle bitmap in right fringe, and both arrow
5684 bitmaps in right fringe. To show just the angle bitmaps in the left
5685 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5687 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5688 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5689 doc
: /* Mapping from logical to physical fringe indicator bitmaps.
5690 The value is an alist where each element (INDICATOR . BITMAPS)
5691 specifies the fringe bitmaps used to display a specific logical
5694 INDICATOR specifies the logical indicator type which is one of the
5695 following symbols: `truncation' , `continuation', `overlay-arrow',
5696 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5698 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5699 the actual bitmap shown in the left or right fringe for the logical
5700 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5701 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5702 are used only for the `bottom' and `top-bottom' indicators when the
5703 last (only) line has no final newline. BITMAPS may also be a single
5704 symbol which is used in both left and right fringes. */);
5706 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5707 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5708 doc
: /* Mapping from logical to physical fringe cursor bitmaps.
5709 The value is an alist where each element (CURSOR . BITMAP)
5710 specifies the fringe bitmaps used to display a specific logical
5711 cursor type in the fringe.
5713 CURSOR specifies the logical cursor type which is one of the following
5714 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5715 one is used to show a hollow cursor on narrow lines display lines
5716 where the normal hollow cursor will not fit.
5718 BITMAP is the corresponding fringe bitmap shown for the logical
5721 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5722 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5723 doc
: /* How far to scroll windows upward.
5724 If you move point off the bottom, the window scrolls automatically.
5725 This variable controls how far it scrolls. The value nil, the default,
5726 means scroll to center point. A fraction means scroll to put point
5727 that fraction of the window's height from the bottom of the window.
5728 When the value is 0.0, point goes at the bottom line, which in the
5729 simple case that you moved off with C-f means scrolling just one line.
5730 1.0 means point goes at the top, so that in that simple case, the
5731 window scrolls by a full window height. Meaningful values are
5732 between 0.0 and 1.0, inclusive. */);
5734 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5735 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5736 doc
: /* How far to scroll windows downward.
5737 If you move point off the top, the window scrolls automatically.
5738 This variable controls how far it scrolls. The value nil, the default,
5739 means scroll to center point. A fraction means scroll to put point
5740 that fraction of the window's height from the top of the window.
5741 When the value is 0.0, point goes at the top line, which in the
5742 simple case that you moved off with C-b means scrolling just one line.
5743 1.0 means point goes at the bottom, so that in that simple case, the
5744 window scrolls by a full window height. Meaningful values are
5745 between 0.0 and 1.0, inclusive. */);
5747 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5751 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5752 doc
: /* List of functions to call before each text change.
5753 Two arguments are passed to each function: the positions of
5754 the beginning and end of the range of old text to be changed.
5755 \(For an insertion, the beginning and end are at the same place.)
5756 No information is given about the length of the text after the change.
5758 Buffer changes made while executing the `before-change-functions'
5759 don't call any before-change or after-change functions.
5760 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5762 If an unhandled error happens in running these functions,
5763 the variable's value remains nil. That prevents the error
5764 from happening repeatedly and making Emacs nonfunctional. */);
5765 Vbefore_change_functions
= Qnil
;
5767 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5768 doc
: /* List of functions to call after each text change.
5769 Three arguments are passed to each function: the positions of
5770 the beginning and end of the range of changed text,
5771 and the length in bytes of the pre-change text replaced by that range.
5772 \(For an insertion, the pre-change length is zero;
5773 for a deletion, that length is the number of bytes deleted,
5774 and the post-change beginning and end are at the same place.)
5776 Buffer changes made while executing the `after-change-functions'
5777 don't call any before-change or after-change functions.
5778 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5780 If an unhandled error happens in running these functions,
5781 the variable's value remains nil. That prevents the error
5782 from happening repeatedly and making Emacs nonfunctional. */);
5783 Vafter_change_functions
= Qnil
;
5785 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5786 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5787 The functions are run using the `run-hooks' function. */);
5788 Vfirst_change_hook
= Qnil
;
5790 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5791 doc
: /* List of undo entries in current buffer.
5792 Recent changes come first; older changes follow newer.
5794 An entry (BEG . END) represents an insertion which begins at
5795 position BEG and ends at position END.
5797 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5798 from (abs POSITION). If POSITION is positive, point was at the front
5799 of the text being deleted; if negative, point was at the end.
5801 An entry (t HIGH . LOW) indicates that the buffer previously had
5802 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5803 of the visited file's modification time, as of that time. If the
5804 modification time of the most recent save is different, this entry is
5807 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5808 was modified between BEG and END. PROPERTY is the property name,
5809 and VALUE is the old value.
5811 An entry (apply FUN-NAME . ARGS) means undo the change with
5812 \(apply FUN-NAME ARGS).
5814 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5815 in the active region. BEG and END is the range affected by this entry
5816 and DELTA is the number of bytes added or deleted in that range by
5819 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5820 was adjusted in position by the offset DISTANCE (an integer).
5822 An entry of the form POSITION indicates that point was at the buffer
5823 location given by the integer. Undoing an entry of this form places
5826 Entries with value `nil' mark undo boundaries. The undo command treats
5827 the changes between two undo boundaries as a single step to be undone.
5829 If the value of the variable is t, undo information is not recorded. */);
5831 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5832 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5834 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5835 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5837 Normally, the line-motion functions work by scanning the buffer for
5838 newlines. Columnar operations (like `move-to-column' and
5839 `compute-motion') also work by scanning the buffer, summing character
5840 widths as they go. This works well for ordinary text, but if the
5841 buffer's lines are very long (say, more than 500 characters), these
5842 motion functions will take longer to execute. Emacs may also take
5843 longer to update the display.
5845 If `cache-long-line-scans' is non-nil, these motion functions cache the
5846 results of their scans, and consult the cache to avoid rescanning
5847 regions of the buffer until the text is modified. The caches are most
5848 beneficial when they prevent the most searching---that is, when the
5849 buffer contains long lines and large regions of characters with the
5850 same, fixed screen width.
5852 When `cache-long-line-scans' is non-nil, processing short lines will
5853 become slightly slower (because of the overhead of consulting the
5854 cache), and the caches will use memory roughly proportional to the
5855 number of newlines and characters whose screen width varies.
5857 The caches require no explicit maintenance; their accuracy is
5858 maintained internally by the Emacs primitives. Enabling or disabling
5859 the cache should not affect the behavior of any of the motion
5860 functions; it should only affect their performance. */);
5862 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5863 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5865 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5866 doc
: /* List of formats to use when saving this buffer.
5867 Formats are defined by `format-alist'. This variable is
5868 set when a file is visited. */);
5870 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5871 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5872 doc
: /* Format in which to write auto-save files.
5873 Should be a list of symbols naming formats that are defined in `format-alist'.
5874 If it is t, which is the default, auto-save files are written in the
5875 same format as a regular save would use. */);
5877 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5878 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5879 doc
: /* Invisibility spec of this buffer.
5880 The default is t, which means that text is invisible
5881 if it has a non-nil `invisible' property.
5882 If the value is a list, a text character is invisible if its `invisible'
5883 property is an element in that list (or is a list with members in common).
5884 If an element is a cons cell of the form (PROP . ELLIPSIS),
5885 then characters with property value PROP are invisible,
5886 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5888 DEFVAR_PER_BUFFER ("buffer-display-count",
5889 &BVAR (current_buffer
, display_count
), Qnil
,
5890 doc
: /* A number incremented each time this buffer is displayed in a window.
5891 The function `set-window-buffer' increments it. */);
5893 DEFVAR_PER_BUFFER ("buffer-display-time",
5894 &BVAR (current_buffer
, display_time
), Qnil
,
5895 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5896 The function `set-window-buffer' updates this variable
5897 to the value obtained by calling `current-time'.
5898 If the buffer has never been shown in a window, the value is nil. */);
5900 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5901 doc
: /* Non-nil if Transient Mark mode is enabled.
5902 See the command `transient-mark-mode' for a description of this minor mode.
5904 Non-nil also enables highlighting of the region whenever the mark is active.
5905 The variable `highlight-nonselected-windows' controls whether to highlight
5906 all windows or just the selected window.
5908 Lisp programs may give this variable certain special values:
5910 - A value of `lambda' enables Transient Mark mode temporarily.
5911 It is disabled again after any subsequent action that would
5912 normally deactivate the mark (e.g. buffer modification).
5914 - A value of (only . OLDVAL) enables Transient Mark mode
5915 temporarily. After any subsequent point motion command that is
5916 not shift-translated, or any other action that would normally
5917 deactivate the mark (e.g. buffer modification), the value of
5918 `transient-mark-mode' is set to OLDVAL. */);
5919 Vtransient_mark_mode
= Qnil
;
5921 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5922 doc
: /* Non-nil means disregard read-only status of buffers or characters.
5923 If the value is t, disregard `buffer-read-only' and all `read-only'
5924 text properties. If the value is a list, disregard `buffer-read-only'
5925 and disregard a `read-only' text property if the property value
5926 is a member of the list. */);
5927 Vinhibit_read_only
= Qnil
;
5929 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5930 doc
: /* Cursor to use when this buffer is in the selected window.
5931 Values are interpreted as follows:
5933 t use the cursor specified for the frame
5934 nil don't display a cursor
5935 box display a filled box cursor
5936 hollow display a hollow box cursor
5937 bar display a vertical bar cursor with default width
5938 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5939 hbar display a horizontal bar cursor with default height
5940 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5941 ANYTHING ELSE display a hollow box cursor
5943 When the buffer is displayed in a non-selected window, the
5944 cursor's appearance is instead controlled by the variable
5945 `cursor-in-non-selected-windows'. */);
5947 DEFVAR_PER_BUFFER ("line-spacing",
5948 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5949 doc
: /* Additional space to put between lines when displaying a buffer.
5950 The space is measured in pixels, and put below lines on graphic displays,
5951 see `display-graphic-p'.
5952 If value is a floating point number, it specifies the spacing relative
5953 to the default frame line height. A value of nil means add no extra space. */);
5955 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5956 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5957 doc
: /* Non-nil means show a cursor in non-selected windows.
5958 If nil, only shows a cursor in the selected window.
5959 If t, displays a cursor related to the usual cursor type
5960 \(a solid box becomes hollow, a bar becomes a narrower bar).
5961 You can also specify the cursor type as in the `cursor-type' variable.
5962 Use Custom to set this variable and update the display." */);
5964 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5965 doc
: /* List of functions called with no args to query before killing a buffer.
5966 The buffer being killed will be current while the functions are running.
5967 If any of them returns nil, the buffer is not killed. */);
5968 Vkill_buffer_query_functions
= Qnil
;
5970 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
5971 doc
: /* Normal hook run before changing the major mode of a buffer.
5972 The function `kill-all-local-variables' runs this before doing anything else. */);
5973 Vchange_major_mode_hook
= Qnil
;
5974 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
5976 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
5977 doc
: /* Hook run when the buffer list changes.
5978 Functions running this hook are `get-buffer-create',
5979 `make-indirect-buffer', `rename-buffer', `kill-buffer',
5980 and `bury-buffer-internal'. */);
5981 Vbuffer_list_update_hook
= Qnil
;
5982 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
5984 defsubr (&Sbuffer_live_p
);
5985 defsubr (&Sbuffer_list
);
5986 defsubr (&Sget_buffer
);
5987 defsubr (&Sget_file_buffer
);
5988 defsubr (&Sget_buffer_create
);
5989 defsubr (&Smake_indirect_buffer
);
5990 defsubr (&Sgenerate_new_buffer_name
);
5991 defsubr (&Sbuffer_name
);
5992 /*defsubr (&Sbuffer_number);*/
5993 defsubr (&Sbuffer_file_name
);
5994 defsubr (&Sbuffer_base_buffer
);
5995 defsubr (&Sbuffer_local_value
);
5996 defsubr (&Sbuffer_local_variables
);
5997 defsubr (&Sbuffer_modified_p
);
5998 defsubr (&Sset_buffer_modified_p
);
5999 defsubr (&Sbuffer_modified_tick
);
6000 defsubr (&Sbuffer_chars_modified_tick
);
6001 defsubr (&Srename_buffer
);
6002 defsubr (&Sother_buffer
);
6003 defsubr (&Sbuffer_enable_undo
);
6004 defsubr (&Skill_buffer
);
6005 defsubr (&Sbury_buffer_internal
);
6006 defsubr (&Sset_buffer_major_mode
);
6007 defsubr (&Scurrent_buffer
);
6008 defsubr (&Sset_buffer
);
6009 defsubr (&Sbarf_if_buffer_read_only
);
6010 defsubr (&Serase_buffer
);
6011 defsubr (&Sbuffer_swap_text
);
6012 defsubr (&Sset_buffer_multibyte
);
6013 defsubr (&Skill_all_local_variables
);
6015 defsubr (&Soverlayp
);
6016 defsubr (&Smake_overlay
);
6017 defsubr (&Sdelete_overlay
);
6018 defsubr (&Smove_overlay
);
6019 defsubr (&Soverlay_start
);
6020 defsubr (&Soverlay_end
);
6021 defsubr (&Soverlay_buffer
);
6022 defsubr (&Soverlay_properties
);
6023 defsubr (&Soverlays_at
);
6024 defsubr (&Soverlays_in
);
6025 defsubr (&Snext_overlay_change
);
6026 defsubr (&Sprevious_overlay_change
);
6027 defsubr (&Soverlay_recenter
);
6028 defsubr (&Soverlay_lists
);
6029 defsubr (&Soverlay_get
);
6030 defsubr (&Soverlay_put
);
6031 defsubr (&Srestore_buffer_modified_p
);
6035 keys_of_buffer (void)
6037 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6038 initial_define_key (control_x_map
, 'k', "kill-buffer");
6040 /* This must not be in syms_of_buffer, because Qdisabled is not
6041 initialized when that function gets called. */
6042 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);