1 /* Buffer manipulation primitives for GNU Emacs.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2012 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
24 #include <sys/param.h>
33 #include "intervals.h"
36 #include "character.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
45 struct buffer
*current_buffer
; /* the current buffer */
47 /* First buffer in chain of all buffers (in reverse order of creation).
48 Threaded through ->header.next.buffer. */
50 struct buffer
*all_buffers
;
52 /* This structure holds the default values of the buffer-local variables
53 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
54 The default value occupies the same slot in this structure
55 as an individual buffer's value occupies in that buffer.
56 Setting the default value also goes through the alist of buffers
57 and stores into each buffer that does not say it has a local value. */
59 DECL_ALIGN (struct buffer
, buffer_defaults
);
61 /* A Lisp_Object pointer to the above, used for staticpro */
63 static Lisp_Object Vbuffer_defaults
;
65 /* This structure marks which slots in a buffer have corresponding
66 default values in buffer_defaults.
67 Each such slot has a nonzero value in this structure.
68 The value has only one nonzero bit.
70 When a buffer has its own local value for a slot,
71 the entry for that slot (found in the same slot in this structure)
72 is turned on in the buffer's local_flags array.
74 If a slot in this structure is -1, then even though there may
75 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
76 and the corresponding slot in buffer_defaults is not used.
78 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
79 zero, that is a bug */
81 struct buffer buffer_local_flags
;
83 /* This structure holds the names of symbols whose values may be
84 buffer-local. It is indexed and accessed in the same way as the above. */
86 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
88 /* A Lisp_Object pointer to the above, used for staticpro */
89 static Lisp_Object Vbuffer_local_symbols
;
91 /* Return the symbol of the per-buffer variable at offset OFFSET in
92 the buffer structure. */
94 #define PER_BUFFER_SYMBOL(OFFSET) \
95 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
97 /* Maximum length of an overlay vector. */
98 #define OVERLAY_COUNT_MAX \
99 ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, \
100 min (PTRDIFF_MAX, SIZE_MAX) / sizeof (Lisp_Object)))
102 /* Flags indicating which built-in buffer-local variables
103 are permanent locals. */
104 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
106 /* Number of per-buffer variables used. */
108 int last_per_buffer_idx
;
110 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
111 int after
, Lisp_Object arg1
,
112 Lisp_Object arg2
, Lisp_Object arg3
);
113 static void swap_out_buffer_local_variables (struct buffer
*b
);
114 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
116 /* Alist of all buffer names vs the buffers. */
117 /* This used to be a variable, but is no longer,
118 to prevent lossage due to user rplac'ing this alist or its elements. */
119 Lisp_Object Vbuffer_alist
;
121 static Lisp_Object Qkill_buffer_query_functions
;
123 /* Hook run before changing a major mode. */
124 static Lisp_Object Qchange_major_mode_hook
;
126 Lisp_Object Qfirst_change_hook
;
127 Lisp_Object Qbefore_change_functions
;
128 Lisp_Object Qafter_change_functions
;
130 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
131 static Lisp_Object Qpermanent_local_hook
;
133 static Lisp_Object Qprotected_field
;
135 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
137 static Lisp_Object Qkill_buffer_hook
;
138 static Lisp_Object Qbuffer_list_update_hook
;
140 static Lisp_Object Qget_file_buffer
;
142 static Lisp_Object Qoverlayp
;
144 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
146 static Lisp_Object Qevaporate
;
148 Lisp_Object Qmodification_hooks
;
149 Lisp_Object Qinsert_in_front_hooks
;
150 Lisp_Object Qinsert_behind_hooks
;
152 static void alloc_buffer_text (struct buffer
*, ptrdiff_t);
153 static void free_buffer_text (struct buffer
*b
);
154 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
155 static void modify_overlay (struct buffer
*, ptrdiff_t, ptrdiff_t);
156 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*);
158 /* For debugging; temporary. See set_buffer_internal. */
159 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
162 nsberror (Lisp_Object spec
)
165 error ("No buffer named %s", SDATA (spec
));
166 error ("Invalid buffer argument");
169 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
170 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
171 Value is nil if OBJECT is not a buffer or if it has been killed. */)
174 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
178 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
179 doc
: /* Return a list of all existing live buffers.
180 If the optional arg FRAME is a frame, we return the buffer list in the
181 proper order for that frame: the buffers show in FRAME come first,
182 followed by the rest of the buffers. */)
186 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
190 Lisp_Object framelist
, prevlist
, tail
;
194 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
195 prevlist
= Fnreverse (Fcopy_sequence
196 (XFRAME (frame
)->buried_buffer_list
));
198 /* Remove from GENERAL any buffer that duplicates one in
199 FRAMELIST or PREVLIST. */
203 general
= Fdelq (XCAR (tail
), general
);
209 general
= Fdelq (XCAR (tail
), general
);
216 return Fnconc (3, args
);
222 /* Like Fassoc, but use Fstring_equal to compare
223 (which ignores text properties),
224 and don't ever QUIT. */
227 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
229 register Lisp_Object tail
;
230 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
232 register Lisp_Object elt
, tem
;
234 tem
= Fstring_equal (Fcar (elt
), key
);
241 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
242 doc
: /* Return the buffer named BUFFER-OR-NAME.
243 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
244 is a string and there is no buffer with that name, return nil. If
245 BUFFER-OR-NAME is a buffer, return it as given. */)
246 (register Lisp_Object buffer_or_name
)
248 if (BUFFERP (buffer_or_name
))
249 return buffer_or_name
;
250 CHECK_STRING (buffer_or_name
);
252 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
255 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
256 doc
: /* Return the buffer visiting file FILENAME (a string).
257 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
258 If there is no such live buffer, return nil.
259 See also `find-buffer-visiting'. */)
260 (register Lisp_Object filename
)
262 register Lisp_Object tail
, buf
, tem
;
265 CHECK_STRING (filename
);
266 filename
= Fexpand_file_name (filename
, Qnil
);
268 /* If the file name has special constructs in it,
269 call the corresponding file handler. */
270 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
273 Lisp_Object handled_buf
= call2 (handler
, Qget_file_buffer
,
275 return BUFFERP (handled_buf
) ? handled_buf
: Qnil
;
278 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
280 buf
= Fcdr (XCAR (tail
));
281 if (!BUFFERP (buf
)) continue;
282 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
283 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
291 get_truename_buffer (register Lisp_Object filename
)
293 register Lisp_Object tail
, buf
, tem
;
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
300 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
307 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
308 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
309 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
310 return that buffer. If no such buffer exists, create a new buffer with
311 that name and return it. If BUFFER-OR-NAME starts with a space, the new
312 buffer does not keep undo information.
314 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
315 even if it is dead. The return value is never nil. */)
316 (register Lisp_Object buffer_or_name
)
318 register Lisp_Object buffer
, name
;
319 register struct buffer
*b
;
321 buffer
= Fget_buffer (buffer_or_name
);
325 if (SCHARS (buffer_or_name
) == 0)
326 error ("Empty string for buffer name is not allowed");
328 b
= allocate_buffer ();
330 /* An ordinary buffer uses its own struct buffer_text. */
331 b
->text
= &b
->own_text
;
334 BUF_GAP_SIZE (b
) = 20;
336 /* We allocate extra 1-byte at the tail and keep it always '\0' for
337 anchoring a search. */
338 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
340 if (! BUF_BEG_ADDR (b
))
341 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
346 b
->pt_byte
= BEG_BYTE
;
347 b
->begv_byte
= BEG_BYTE
;
348 b
->zv_byte
= BEG_BYTE
;
351 BUF_GPT_BYTE (b
) = BEG_BYTE
;
354 BUF_Z_BYTE (b
) = BEG_BYTE
;
356 BUF_CHARS_MODIFF (b
) = 1;
357 BUF_OVERLAY_MODIFF (b
) = 1;
358 BUF_SAVE_MODIFF (b
) = 1;
359 BUF_INTERVALS (b
) = 0;
360 BUF_UNCHANGED_MODIFIED (b
) = 1;
361 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
362 BUF_END_UNCHANGED (b
) = 0;
363 BUF_BEG_UNCHANGED (b
) = 0;
364 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
365 b
->text
->inhibit_shrinking
= 0;
367 b
->newline_cache
= 0;
368 b
->width_run_cache
= 0;
369 BVAR (b
, width_table
) = Qnil
;
370 b
->prevent_redisplay_optimizations_p
= 1;
372 /* Put this on the chain of all buffers including killed ones. */
373 b
->header
.next
.buffer
= all_buffers
;
376 /* An ordinary buffer normally doesn't need markers
377 to handle BEGV and ZV. */
378 BVAR (b
, pt_marker
) = Qnil
;
379 BVAR (b
, begv_marker
) = Qnil
;
380 BVAR (b
, zv_marker
) = Qnil
;
382 name
= Fcopy_sequence (buffer_or_name
);
383 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
384 BVAR (b
, name
) = name
;
386 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
389 reset_buffer_local_variables (b
, 1);
391 BVAR (b
, mark
) = Fmake_marker ();
392 BUF_MARKERS (b
) = NULL
;
394 /* Put this in the alist of all live buffers. */
395 XSETBUFFER (buffer
, b
);
396 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
397 /* And run buffer-list-update-hook. */
398 if (!NILP (Vrun_hooks
))
399 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
405 /* Return a list of overlays which is a copy of the overlay list
406 LIST, but for buffer B. */
408 static struct Lisp_Overlay
*
409 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
412 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
414 XSETBUFFER (buffer
, b
);
416 for (; list
; list
= list
->next
)
418 Lisp_Object overlay
, start
, end
, old_overlay
;
421 XSETMISC (old_overlay
, list
);
422 charpos
= marker_position (OVERLAY_START (old_overlay
));
423 start
= Fmake_marker ();
424 Fset_marker (start
, make_number (charpos
), buffer
);
425 XMARKER (start
)->insertion_type
426 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
428 charpos
= marker_position (OVERLAY_END (old_overlay
));
429 end
= Fmake_marker ();
430 Fset_marker (end
, make_number (charpos
), buffer
);
431 XMARKER (end
)->insertion_type
432 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
434 overlay
= allocate_misc ();
435 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
436 OVERLAY_START (overlay
) = start
;
437 OVERLAY_END (overlay
) = end
;
438 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
439 XOVERLAY (overlay
)->next
= NULL
;
442 tail
= tail
->next
= XOVERLAY (overlay
);
444 result
= tail
= XOVERLAY (overlay
);
451 /* Clone per-buffer values of buffer FROM.
453 Buffer TO gets the same per-buffer values as FROM, with the
454 following exceptions: (1) TO's name is left untouched, (2) markers
455 are copied and made to refer to TO, and (3) overlay lists are
459 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
463 for_each_per_buffer_object_at (offset
)
467 /* Don't touch the `name' which should be unique for every buffer. */
468 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
471 obj
= PER_BUFFER_VALUE (from
, offset
);
472 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
474 struct Lisp_Marker
*m
= XMARKER (obj
);
476 obj
= build_marker (to
, m
->charpos
, m
->bytepos
);
477 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
480 PER_BUFFER_VALUE (to
, offset
) = obj
;
483 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
485 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
486 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
488 /* Get (a copy of) the alist of Lisp-level local variables of FROM
489 and install that in TO. */
490 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
494 /* If buffer B has markers to record PT, BEGV and ZV when it is not
495 current, update these markers. */
498 record_buffer_markers (struct buffer
*b
)
500 if (! NILP (BVAR (b
, pt_marker
)))
504 eassert (!NILP (BVAR (b
, begv_marker
)));
505 eassert (!NILP (BVAR (b
, zv_marker
)));
507 XSETBUFFER (buffer
, b
);
508 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
509 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
510 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
515 /* If buffer B has markers to record PT, BEGV and ZV when it is not
516 current, fetch these values into B->begv etc. */
519 fetch_buffer_markers (struct buffer
*b
)
521 if (! NILP (BVAR (b
, pt_marker
)))
525 eassert (!NILP (BVAR (b
, begv_marker
)));
526 eassert (!NILP (BVAR (b
, zv_marker
)));
528 m
= BVAR (b
, pt_marker
);
529 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
531 m
= BVAR (b
, begv_marker
);
532 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
534 m
= BVAR (b
, zv_marker
);
535 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
540 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
542 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
543 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
544 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
545 NAME should be a string which is not the name of an existing buffer.
546 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
547 such as major and minor modes, in the indirect buffer.
548 CLONE nil means the indirect buffer's state is reset to default values. */)
549 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
551 Lisp_Object buf
, tem
;
555 buf
= Fget_buffer (name
);
557 error ("Buffer name `%s' is in use", SDATA (name
));
560 base_buffer
= Fget_buffer (base_buffer
);
561 if (NILP (base_buffer
))
562 error ("No such buffer: `%s'", SDATA (tem
));
563 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
564 error ("Base buffer has been killed");
566 if (SCHARS (name
) == 0)
567 error ("Empty string for buffer name is not allowed");
569 b
= allocate_buffer ();
571 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
572 ? XBUFFER (base_buffer
)->base_buffer
573 : XBUFFER (base_buffer
));
575 /* Use the base buffer's text object. */
576 b
->text
= b
->base_buffer
->text
;
578 b
->pt
= b
->base_buffer
->pt
;
579 b
->begv
= b
->base_buffer
->begv
;
580 b
->zv
= b
->base_buffer
->zv
;
581 b
->pt_byte
= b
->base_buffer
->pt_byte
;
582 b
->begv_byte
= b
->base_buffer
->begv_byte
;
583 b
->zv_byte
= b
->base_buffer
->zv_byte
;
585 b
->newline_cache
= 0;
586 b
->width_run_cache
= 0;
587 BVAR (b
, width_table
) = Qnil
;
589 /* Put this on the chain of all buffers including killed ones. */
590 b
->header
.next
.buffer
= all_buffers
;
593 name
= Fcopy_sequence (name
);
594 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
595 BVAR (b
, name
) = name
;
598 reset_buffer_local_variables (b
, 1);
600 /* Put this in the alist of all live buffers. */
602 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
604 BVAR (b
, mark
) = Fmake_marker ();
606 /* The multibyte status belongs to the base buffer. */
607 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
609 /* Make sure the base buffer has markers for its narrowing. */
610 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
612 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
613 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
615 BVAR (b
->base_buffer
, pt_marker
)
616 = build_marker (b
->base_buffer
, b
->base_buffer
->pt
, b
->base_buffer
->pt_byte
);
618 BVAR (b
->base_buffer
, begv_marker
)
619 = build_marker (b
->base_buffer
, b
->base_buffer
->begv
, b
->base_buffer
->begv_byte
);
621 BVAR (b
->base_buffer
, zv_marker
)
622 = build_marker (b
->base_buffer
, b
->base_buffer
->zv
, b
->base_buffer
->zv_byte
);
624 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
629 /* Give the indirect buffer markers for its narrowing. */
630 BVAR (b
, pt_marker
) = build_marker (b
, b
->pt
, b
->pt_byte
);
631 BVAR (b
, begv_marker
) = build_marker (b
, b
->begv
, b
->begv_byte
);
632 BVAR (b
, zv_marker
) = build_marker (b
, b
->zv
, b
->zv_byte
);
633 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
637 struct buffer
*old_b
= current_buffer
;
639 clone_per_buffer_values (b
->base_buffer
, b
);
640 BVAR (b
, filename
) = Qnil
;
641 BVAR (b
, file_truename
) = Qnil
;
642 BVAR (b
, display_count
) = make_number (0);
643 BVAR (b
, backed_up
) = Qnil
;
644 BVAR (b
, auto_save_file_name
) = Qnil
;
645 set_buffer_internal_1 (b
);
646 Fset (intern ("buffer-save-without-query"), Qnil
);
647 Fset (intern ("buffer-file-number"), Qnil
);
648 Fset (intern ("buffer-stale-function"), Qnil
);
649 set_buffer_internal_1 (old_b
);
652 /* Run buffer-list-update-hook. */
653 if (!NILP (Vrun_hooks
))
654 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
659 /* Mark OV as no longer associated with B. */
662 drop_overlay (struct buffer
*b
, struct Lisp_Overlay
*ov
)
664 eassert (b
== XBUFFER (Fmarker_buffer (ov
->start
)));
665 modify_overlay (b
, marker_position (ov
->start
), marker_position (ov
->end
));
666 Fset_marker (ov
->start
, Qnil
, Qnil
);
667 Fset_marker (ov
->end
, Qnil
, Qnil
);
671 /* Delete all overlays of B and reset it's overlay lists. */
674 delete_all_overlays (struct buffer
*b
)
676 struct Lisp_Overlay
*ov
, *next
;
678 for (ov
= b
->overlays_before
; ov
; ov
= next
)
680 drop_overlay (b
, ov
);
685 for (ov
= b
->overlays_after
; ov
; ov
= next
)
687 drop_overlay (b
, ov
);
692 b
->overlays_before
= b
->overlays_after
= NULL
;
695 /* Reinitialize everything about a buffer except its name and contents
697 If called on an already-initialized buffer, the list of overlays
698 should be deleted before calling this function, otherwise we end up
699 with overlays that claim to belong to the buffer but the buffer
700 claims it doesn't belong to it. */
703 reset_buffer (register struct buffer
*b
)
705 BVAR (b
, filename
) = Qnil
;
706 BVAR (b
, file_truename
) = Qnil
;
707 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
708 EMACS_SET_SECS_NSECS (b
->modtime
, 0, UNKNOWN_MODTIME_NSECS
);
709 b
->modtime_size
= -1;
710 XSETFASTINT (BVAR (b
, save_length
), 0);
711 b
->last_window_start
= 1;
712 /* It is more conservative to start out "changed" than "unchanged". */
714 b
->prevent_redisplay_optimizations_p
= 1;
715 BVAR (b
, backed_up
) = Qnil
;
716 BUF_AUTOSAVE_MODIFF (b
) = 0;
717 b
->auto_save_failure_time
= 0;
718 BVAR (b
, auto_save_file_name
) = Qnil
;
719 BVAR (b
, read_only
) = Qnil
;
720 b
->overlays_before
= NULL
;
721 b
->overlays_after
= NULL
;
722 b
->overlay_center
= BEG
;
723 BVAR (b
, mark_active
) = Qnil
;
724 BVAR (b
, point_before_scroll
) = Qnil
;
725 BVAR (b
, file_format
) = Qnil
;
726 BVAR (b
, auto_save_file_format
) = Qt
;
727 BVAR (b
, last_selected_window
) = Qnil
;
728 XSETINT (BVAR (b
, display_count
), 0);
729 BVAR (b
, display_time
) = Qnil
;
730 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
731 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
732 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
734 b
->display_error_modiff
= 0;
737 /* Reset buffer B's local variables info.
738 Don't use this on a buffer that has already been in use;
739 it does not treat permanent locals consistently.
740 Instead, use Fkill_all_local_variables.
742 If PERMANENT_TOO is 1, then we reset permanent
743 buffer-local variables. If PERMANENT_TOO is 0,
744 we preserve those. */
747 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
752 /* Reset the major mode to Fundamental, together with all the
753 things that depend on the major mode.
754 default-major-mode is handled at a higher level.
755 We ignore it here. */
756 BVAR (b
, major_mode
) = Qfundamental_mode
;
757 BVAR (b
, keymap
) = Qnil
;
758 BVAR (b
, mode_name
) = QSFundamental
;
759 BVAR (b
, minor_modes
) = Qnil
;
761 /* If the standard case table has been altered and invalidated,
762 fix up its insides first. */
763 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
764 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
765 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
766 Fset_standard_case_table (Vascii_downcase_table
);
768 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
769 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
770 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
771 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
772 BVAR (b
, invisibility_spec
) = Qt
;
774 /* Reset all (or most) per-buffer variables to their defaults. */
776 BVAR (b
, local_var_alist
) = Qnil
;
779 Lisp_Object tmp
, prop
, last
= Qnil
;
780 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
781 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
783 /* If permanent-local, keep it. */
785 if (EQ (prop
, Qpermanent_local_hook
))
787 /* This is a partially permanent hook variable.
788 Preserve only the elements that want to be preserved. */
789 Lisp_Object list
, newlist
;
790 list
= XCDR (XCAR (tmp
));
794 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
796 Lisp_Object elt
= XCAR (list
);
797 /* Preserve element ELT if it's t,
798 if it is a function with a `permanent-local-hook' property,
799 or if it's not a symbol. */
802 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
803 newlist
= Fcons (elt
, newlist
);
805 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
808 /* Delete this local variable. */
809 else if (NILP (last
))
810 BVAR (b
, local_var_alist
) = XCDR (tmp
);
812 XSETCDR (last
, XCDR (tmp
));
815 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
816 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
817 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
819 /* For each slot that has a default value, copy that into the slot. */
820 for_each_per_buffer_object_at (offset
)
822 int idx
= PER_BUFFER_IDX (offset
);
825 || buffer_permanent_local_flags
[idx
] == 0)))
826 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
830 /* We split this away from generate-new-buffer, because rename-buffer
831 and set-visited-file-name ought to be able to use this to really
832 rename the buffer properly. */
834 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
835 Sgenerate_new_buffer_name
, 1, 2, 0,
836 doc
: /* Return a string that is the name of no existing buffer based on NAME.
837 If there is no live buffer named NAME, then return NAME.
838 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
839 \(starting at 2) until an unused name is found, and then return that name.
840 Optional second argument IGNORE specifies a name that is okay to use (if
841 it is in the sequence to be tried) even if a buffer with that name exists.
843 If NAME begins with a space (i.e., a buffer that is not normally
844 visible to users), then if buffer NAME already exists a random number
845 is first appended to NAME, to speed up finding a non-existent buffer. */)
846 (register Lisp_Object name
, Lisp_Object ignore
)
848 register Lisp_Object gentemp
, tem
, tem2
;
850 char number
[INT_BUFSIZE_BOUND (ptrdiff_t) + sizeof "<>"];
854 tem
= Fstring_equal (name
, ignore
);
857 tem
= Fget_buffer (name
);
861 if (!strncmp (SSDATA (name
), " ", 1)) /* see bug#1229 */
863 /* Note fileio.c:make_temp_name does random differently. */
864 sprintf (number
, "-%"pI
"d", XFASTINT (Frandom (make_number (999999))));
865 tem2
= concat2 (name
, build_string (number
));
866 tem
= Fget_buffer (tem2
);
876 sprintf (number
, "<%"pD
"d>", ++count
);
877 gentemp
= concat2 (tem2
, build_string (number
));
878 tem
= Fstring_equal (gentemp
, ignore
);
881 tem
= Fget_buffer (gentemp
);
888 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
889 doc
: /* Return the name of BUFFER, as a string.
890 BUFFER defaults to the current buffer.
891 Return nil if BUFFER has been killed. */)
892 (register Lisp_Object buffer
)
895 return BVAR (current_buffer
, name
);
896 CHECK_BUFFER (buffer
);
897 return BVAR (XBUFFER (buffer
), name
);
900 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
901 doc
: /* Return name of file BUFFER is visiting, or nil if none.
902 No argument or nil as argument means use the current buffer. */)
903 (register Lisp_Object buffer
)
906 return BVAR (current_buffer
, filename
);
907 CHECK_BUFFER (buffer
);
908 return BVAR (XBUFFER (buffer
), filename
);
911 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
913 doc
: /* Return the base buffer of indirect buffer BUFFER.
914 If BUFFER is not indirect, return nil.
915 BUFFER defaults to the current buffer. */)
916 (register Lisp_Object buffer
)
919 Lisp_Object base_buffer
;
922 base
= current_buffer
->base_buffer
;
925 CHECK_BUFFER (buffer
);
926 base
= XBUFFER (buffer
)->base_buffer
;
931 XSETBUFFER (base_buffer
, base
);
935 DEFUN ("buffer-local-value", Fbuffer_local_value
,
936 Sbuffer_local_value
, 2, 2, 0,
937 doc
: /* Return the value of VARIABLE in BUFFER.
938 If VARIABLE does not have a buffer-local binding in BUFFER, the value
939 is the default binding of the variable. */)
940 (register Lisp_Object variable
, register Lisp_Object buffer
)
942 register Lisp_Object result
= buffer_local_value_1 (variable
, buffer
);
944 if (EQ (result
, Qunbound
))
945 xsignal1 (Qvoid_variable
, variable
);
951 /* Like Fbuffer_local_value, but return Qunbound if the variable is
955 buffer_local_value_1 (Lisp_Object variable
, Lisp_Object buffer
)
957 register struct buffer
*buf
;
958 register Lisp_Object result
;
959 struct Lisp_Symbol
*sym
;
961 CHECK_SYMBOL (variable
);
962 CHECK_BUFFER (buffer
);
963 buf
= XBUFFER (buffer
);
964 sym
= XSYMBOL (variable
);
967 switch (sym
->redirect
)
969 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
970 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
971 case SYMBOL_LOCALIZED
:
972 { /* Look in local_var_alist. */
973 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
974 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
975 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
979 { /* What binding is loaded right now? */
980 Lisp_Object current_alist_element
= blv
->valcell
;
982 /* The value of the currently loaded binding is not
983 stored in it, but rather in the realvalue slot.
984 Store that value into the binding it belongs to
985 in case that is the one we are about to use. */
987 XSETCDR (current_alist_element
,
988 do_symval_forwarding (blv
->fwd
));
990 /* Now get the (perhaps updated) value out of the binding. */
991 result
= XCDR (result
);
994 result
= Fdefault_value (variable
);
997 case SYMBOL_FORWARDED
:
999 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
1000 if (BUFFER_OBJFWDP (fwd
))
1001 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
1003 result
= Fdefault_value (variable
);
1012 /* Return an alist of the Lisp-level buffer-local bindings of
1013 buffer BUF. That is, don't include the variables maintained
1014 in special slots in the buffer object. */
1017 buffer_lisp_local_variables (struct buffer
*buf
)
1019 Lisp_Object result
= Qnil
;
1020 register Lisp_Object tail
;
1021 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1023 Lisp_Object val
, elt
;
1027 /* Reference each variable in the alist in buf.
1028 If inquiring about the current buffer, this gets the current values,
1029 so store them into the alist so the alist is up to date.
1030 If inquiring about some other buffer, this swaps out any values
1031 for that buffer, making the alist up to date automatically. */
1032 val
= find_symbol_value (XCAR (elt
));
1033 /* Use the current buffer value only if buf is the current buffer. */
1034 if (buf
!= current_buffer
)
1037 result
= Fcons (EQ (val
, Qunbound
)
1039 : Fcons (XCAR (elt
), val
),
1046 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1047 Sbuffer_local_variables
, 0, 1, 0,
1048 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1049 Most elements look like (SYMBOL . VALUE), describing one variable.
1050 For a symbol that is locally unbound, just the symbol appears in the value.
1051 Note that storing new VALUEs in these elements doesn't change the variables.
1052 No argument or nil as argument means use current buffer as BUFFER. */)
1053 (register Lisp_Object buffer
)
1055 register struct buffer
*buf
;
1056 register Lisp_Object result
;
1059 buf
= current_buffer
;
1062 CHECK_BUFFER (buffer
);
1063 buf
= XBUFFER (buffer
);
1066 result
= buffer_lisp_local_variables (buf
);
1068 /* Add on all the variables stored in special slots. */
1072 for_each_per_buffer_object_at (offset
)
1074 idx
= PER_BUFFER_IDX (offset
);
1075 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1076 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1078 Lisp_Object sym
= PER_BUFFER_SYMBOL (offset
);
1079 Lisp_Object val
= PER_BUFFER_VALUE (buf
, offset
);
1080 result
= Fcons (EQ (val
, Qunbound
) ? sym
: Fcons (sym
, val
),
1089 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1091 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1092 No argument or nil as argument means use current buffer as BUFFER. */)
1093 (register Lisp_Object buffer
)
1095 register struct buffer
*buf
;
1097 buf
= current_buffer
;
1100 CHECK_BUFFER (buffer
);
1101 buf
= XBUFFER (buffer
);
1104 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1107 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1109 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1110 A non-nil FLAG means mark the buffer modified. */)
1111 (register Lisp_Object flag
)
1113 register int already
;
1114 register Lisp_Object fn
;
1115 Lisp_Object buffer
, window
;
1117 #ifdef CLASH_DETECTION
1118 /* If buffer becoming modified, lock the file.
1119 If buffer becoming unmodified, unlock the file. */
1121 fn
= BVAR (current_buffer
, file_truename
);
1122 /* Test buffer-file-name so that binding it to nil is effective. */
1123 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1125 already
= SAVE_MODIFF
< MODIFF
;
1126 if (!already
&& !NILP (flag
))
1128 else if (already
&& NILP (flag
))
1131 #endif /* CLASH_DETECTION */
1133 /* Here we have a problem. SAVE_MODIFF is used here to encode
1134 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1135 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1136 modify SAVE_MODIFF to affect one, we may affect the other
1138 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1139 if SAVE_MODIFF<auto_save_modified that means we risk changing
1140 recent-auto-save-p from t to nil.
1141 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1142 we risk changing recent-auto-save-p from nil to t. */
1143 SAVE_MODIFF
= (NILP (flag
)
1144 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1146 /* Let's try to preserve recent-auto-save-p. */
1147 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1148 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1149 we can either decrease SAVE_MODIFF and auto_save_modified
1150 or increase MODIFF. */
1153 /* Set update_mode_lines only if buffer is displayed in some window.
1154 Packages like jit-lock or lazy-lock preserve a buffer's modified
1155 state by recording/restoring the state around blocks of code.
1156 Setting update_mode_lines makes redisplay consider all windows
1157 (on all frames). Stealth fontification of buffers not displayed
1158 would incur additional redisplay costs if we'd set
1159 update_modes_lines unconditionally.
1161 Ideally, I think there should be another mechanism for fontifying
1162 buffers without "modifying" buffers, or redisplay should be
1163 smarter about updating the `*' in mode lines. --gerd */
1164 XSETBUFFER (buffer
, current_buffer
);
1165 window
= Fget_buffer_window (buffer
, Qt
);
1166 if (WINDOWP (window
))
1168 ++update_mode_lines
;
1169 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1175 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1176 Srestore_buffer_modified_p
, 1, 1, 0,
1177 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1178 It is not ensured that mode lines will be updated to show the modified
1179 state of the current buffer. Use with care. */)
1182 #ifdef CLASH_DETECTION
1185 /* If buffer becoming modified, lock the file.
1186 If buffer becoming unmodified, unlock the file. */
1188 fn
= BVAR (current_buffer
, file_truename
);
1189 /* Test buffer-file-name so that binding it to nil is effective. */
1190 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1192 int already
= SAVE_MODIFF
< MODIFF
;
1193 if (!already
&& !NILP (flag
))
1195 else if (already
&& NILP (flag
))
1198 #endif /* CLASH_DETECTION */
1200 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1204 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1206 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1207 Each buffer has a tick counter which is incremented each time the
1208 text in that buffer is changed. It wraps around occasionally.
1209 No argument or nil as argument means use current buffer as BUFFER. */)
1210 (register Lisp_Object buffer
)
1212 register struct buffer
*buf
;
1214 buf
= current_buffer
;
1217 CHECK_BUFFER (buffer
);
1218 buf
= XBUFFER (buffer
);
1221 return make_number (BUF_MODIFF (buf
));
1224 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1225 Sbuffer_chars_modified_tick
, 0, 1, 0,
1226 doc
: /* Return BUFFER's character-change tick counter.
1227 Each buffer has a character-change tick counter, which is set to the
1228 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1229 time text in that buffer is inserted or deleted. By comparing the
1230 values returned by two individual calls of `buffer-chars-modified-tick',
1231 you can tell whether a character change occurred in that buffer in
1232 between these calls. No argument or nil as argument means use current
1233 buffer as BUFFER. */)
1234 (register Lisp_Object buffer
)
1236 register struct buffer
*buf
;
1238 buf
= current_buffer
;
1241 CHECK_BUFFER (buffer
);
1242 buf
= XBUFFER (buffer
);
1245 return make_number (BUF_CHARS_MODIFF (buf
));
1248 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1249 "(list (read-string \"Rename buffer (to new name): \" \
1250 nil 'buffer-name-history (buffer-name (current-buffer))) \
1251 current-prefix-arg)",
1252 doc
: /* Change current buffer's name to NEWNAME (a string).
1253 If second arg UNIQUE is nil or omitted, it is an error if a
1254 buffer named NEWNAME already exists.
1255 If UNIQUE is non-nil, come up with a new name using
1256 `generate-new-buffer-name'.
1257 Interactively, you can set UNIQUE with a prefix argument.
1258 We return the name we actually gave the buffer.
1259 This does not change the name of the visited file (if any). */)
1260 (register Lisp_Object newname
, Lisp_Object unique
)
1262 register Lisp_Object tem
, buf
;
1264 CHECK_STRING (newname
);
1266 if (SCHARS (newname
) == 0)
1267 error ("Empty string is invalid as a buffer name");
1269 tem
= Fget_buffer (newname
);
1272 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1273 rename the buffer automatically so you can create another
1274 with the original name. It makes UNIQUE equivalent to
1275 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1276 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1277 return BVAR (current_buffer
, name
);
1279 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1281 error ("Buffer name `%s' is in use", SDATA (newname
));
1284 BVAR (current_buffer
, name
) = newname
;
1286 /* Catch redisplay's attention. Unless we do this, the mode lines for
1287 any windows displaying current_buffer will stay unchanged. */
1288 update_mode_lines
++;
1290 XSETBUFFER (buf
, current_buffer
);
1291 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1292 if (NILP (BVAR (current_buffer
, filename
))
1293 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1294 call0 (intern ("rename-auto-save-file"));
1296 /* Run buffer-list-update-hook. */
1297 if (!NILP (Vrun_hooks
))
1298 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1300 /* Refetch since that last call may have done GC. */
1301 return BVAR (current_buffer
, name
);
1304 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1305 doc
: /* Return most recently selected buffer other than BUFFER.
1306 Buffers not visible in windows are preferred to visible buffers, unless
1307 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1308 BUFFER unless it denotes a live buffer. If the optional third argument
1309 FRAME is non-nil, use that frame's buffer list instead of the selected
1310 frame's buffer list.
1312 The buffer is found by scanning the selected or specified frame's buffer
1313 list first, followed by the list of all buffers. If no other buffer
1314 exists, return the buffer `*scratch*' (creating it if necessary). */)
1315 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1317 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1318 Lisp_Object tail
, buf
, pred
;
1319 Lisp_Object notsogood
= Qnil
;
1322 frame
= selected_frame
;
1324 CHECK_FRAME (frame
);
1326 pred
= frame_buffer_predicate (frame
);
1327 /* Consider buffers that have been seen in the frame first. */
1328 tail
= XFRAME (frame
)->buffer_list
;
1329 for (; CONSP (tail
); tail
= XCDR (tail
))
1332 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1333 && !NILP (BVAR (XBUFFER (buf
), name
))
1334 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1335 /* If the frame has a buffer_predicate, disregard buffers that
1336 don't fit the predicate. */
1337 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1339 if (!NILP (visible_ok
)
1340 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1342 else if (NILP (notsogood
))
1347 /* Consider alist of all buffers next. */
1348 tail
= Vbuffer_alist
;
1349 for (; CONSP (tail
); tail
= XCDR (tail
))
1351 buf
= Fcdr (XCAR (tail
));
1352 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1353 && !NILP (BVAR (XBUFFER (buf
), name
))
1354 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1355 /* If the frame has a buffer_predicate, disregard buffers that
1356 don't fit the predicate. */
1357 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1359 if (!NILP (visible_ok
)
1360 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1362 else if (NILP (notsogood
))
1367 if (!NILP (notsogood
))
1371 buf
= Fget_buffer (build_string ("*scratch*"));
1374 buf
= Fget_buffer_create (build_string ("*scratch*"));
1375 Fset_buffer_major_mode (buf
);
1381 /* The following function is a safe variant of Fother_buffer: It doesn't
1382 pay attention to any frame-local buffer lists, doesn't care about
1383 visibility of buffers, and doesn't evaluate any frame predicates. */
1386 other_buffer_safely (Lisp_Object buffer
)
1388 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1389 Lisp_Object tail
, buf
;
1391 tail
= Vbuffer_alist
;
1392 for (; CONSP (tail
); tail
= XCDR (tail
))
1394 buf
= Fcdr (XCAR (tail
));
1395 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1396 && !NILP (BVAR (XBUFFER (buf
), name
))
1397 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1401 buf
= Fget_buffer (build_string ("*scratch*"));
1404 buf
= Fget_buffer_create (build_string ("*scratch*"));
1405 Fset_buffer_major_mode (buf
);
1411 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1413 doc
: /* Start keeping undo information for buffer BUFFER.
1414 No argument or nil as argument means do this for the current buffer. */)
1415 (register Lisp_Object buffer
)
1417 Lisp_Object real_buffer
;
1420 XSETBUFFER (real_buffer
, current_buffer
);
1423 real_buffer
= Fget_buffer (buffer
);
1424 if (NILP (real_buffer
))
1428 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1429 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1435 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1436 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1437 The buffer being killed will be current while the hook is running.\n\
1439 Functions run by this hook are supposed to not change the current
1440 buffer. See `kill-buffer'."
1442 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1443 doc
: /* Kill the buffer specified by BUFFER-OR-NAME.
1444 The argument may be a buffer or the name of an existing buffer.
1445 Argument nil or omitted means kill the current buffer. Return t if the
1446 buffer is actually killed, nil otherwise.
1448 The functions in `kill-buffer-query-functions' are called with the
1449 buffer to be killed as the current buffer. If any of them returns nil,
1450 the buffer is not killed. The hook `kill-buffer-hook' is run before the
1451 buffer is actually killed. The buffer being killed will be current
1452 while the hook is running. Functions called by any of these hooks are
1453 supposed to not change the current buffer.
1455 Any processes that have this buffer as the `process-buffer' are killed
1456 with SIGHUP. This function calls `replace-buffer-in-windows' for
1457 cleaning up all windows currently displaying the buffer to be killed. */)
1458 (Lisp_Object buffer_or_name
)
1461 register struct buffer
*b
;
1462 register Lisp_Object tem
;
1463 register struct Lisp_Marker
*m
;
1464 struct gcpro gcpro1
;
1466 if (NILP (buffer_or_name
))
1467 buffer
= Fcurrent_buffer ();
1469 buffer
= Fget_buffer (buffer_or_name
);
1471 nsberror (buffer_or_name
);
1473 b
= XBUFFER (buffer
);
1475 /* Avoid trouble for buffer already dead. */
1476 if (NILP (BVAR (b
, name
)))
1479 /* Query if the buffer is still modified. */
1480 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1481 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1484 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1485 BVAR (b
, name
), make_number (0)));
1491 /* Run hooks with the buffer to be killed the current buffer. */
1493 ptrdiff_t count
= SPECPDL_INDEX ();
1494 Lisp_Object arglist
[1];
1496 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1497 set_buffer_internal (b
);
1499 /* First run the query functions; if any query is answered no,
1500 don't kill the buffer. */
1501 arglist
[0] = Qkill_buffer_query_functions
;
1502 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1504 return unbind_to (count
, Qnil
);
1506 /* Then run the hooks. */
1507 Frun_hooks (1, &Qkill_buffer_hook
);
1508 unbind_to (count
, Qnil
);
1511 /* If the hooks have killed the buffer, exit now. */
1512 if (NILP (BVAR (b
, name
)))
1515 /* We have no more questions to ask. Verify that it is valid
1516 to kill the buffer. This must be done after the questions
1517 since anything can happen within do_yes_or_no_p. */
1519 /* Don't kill the minibuffer now current. */
1520 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1523 /* When we kill a base buffer, kill all its indirect buffers.
1524 We do it at this stage so nothing terrible happens if they
1525 ask questions or their hooks get errors. */
1526 if (! b
->base_buffer
)
1528 struct buffer
*other
;
1532 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1533 /* all_buffers contains dead buffers too;
1534 don't re-kill them. */
1535 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1538 XSETBUFFER (buf
, other
);
1544 /* Exit if we now have killed the base buffer (Bug#11665). */
1545 if (NILP (BVAR (b
, name
)))
1549 /* Run replace_buffer_in_windows before making another buffer current
1550 since set-window-buffer-start-and-point will refuse to make another
1551 buffer current if the selected window does not show the current
1552 buffer. (Bug#10114) */
1553 replace_buffer_in_windows (buffer
);
1555 /* Exit if replacing the buffer in windows has killed our buffer. */
1556 if (NILP (BVAR (b
, name
)))
1559 /* Make this buffer not be current. Exit if it is the sole visible
1561 if (b
== current_buffer
)
1563 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1565 if (b
== current_buffer
)
1569 /* If the buffer now current is shown in the minibuffer and our buffer
1570 is the sole other buffer give up. */
1571 XSETBUFFER (tem
, current_buffer
);
1572 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
)
1573 && EQ (buffer
, Fother_buffer (buffer
, Qnil
, Qnil
)))
1576 /* Now there is no question: we can kill the buffer. */
1578 #ifdef CLASH_DETECTION
1579 /* Unlock this buffer's file, if it is locked. */
1581 #endif /* CLASH_DETECTION */
1584 kill_buffer_processes (buffer
);
1587 /* Killing buffer processes may run sentinels which may have killed
1589 if (NILP (BVAR (b
, name
)))
1592 /* These may run Lisp code and into infinite loops (if someone
1593 insisted on circular lists) so allow quitting here. */
1594 frames_discard_buffer (buffer
);
1596 clear_charpos_cache (b
);
1598 tem
= Vinhibit_quit
;
1600 /* Remove the buffer from the list of all buffers. */
1601 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1602 /* If replace_buffer_in_windows didn't do its job fix that now. */
1603 replace_buffer_in_windows_safely (buffer
);
1604 Vinhibit_quit
= tem
;
1606 /* Delete any auto-save file, if we saved it in this session.
1607 But not if the buffer is modified. */
1608 if (STRINGP (BVAR (b
, auto_save_file_name
))
1609 && BUF_AUTOSAVE_MODIFF (b
) != 0
1610 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1611 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1612 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1615 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1616 if (! NILP (delete))
1617 internal_delete_file (BVAR (b
, auto_save_file_name
));
1620 /* Deleting an auto-save file could have killed our buffer. */
1621 if (NILP (BVAR (b
, name
)))
1626 /* Unchain all markers that belong to this indirect buffer.
1627 Don't unchain the markers that belong to the base buffer
1628 or its other indirect buffers. */
1629 for (m
= BUF_MARKERS (b
); m
; )
1631 struct Lisp_Marker
*next
= m
->next
;
1639 /* Unchain all markers of this buffer and its indirect buffers.
1640 and leave them pointing nowhere. */
1641 for (m
= BUF_MARKERS (b
); m
; )
1643 struct Lisp_Marker
*next
= m
->next
;
1648 BUF_MARKERS (b
) = NULL
;
1649 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1651 /* Perhaps we should explicitly free the interval tree here... */
1654 /* Reset the local variables, so that this buffer's local values
1655 won't be protected from GC. They would be protected
1656 if they happened to remain cached in their symbols.
1657 This gets rid of them for certain. */
1658 swap_out_buffer_local_variables (b
);
1659 reset_buffer_local_variables (b
, 1);
1661 BVAR (b
, name
) = Qnil
;
1664 if (! b
->base_buffer
)
1665 free_buffer_text (b
);
1667 if (b
->newline_cache
)
1669 free_region_cache (b
->newline_cache
);
1670 b
->newline_cache
= 0;
1672 if (b
->width_run_cache
)
1674 free_region_cache (b
->width_run_cache
);
1675 b
->width_run_cache
= 0;
1677 BVAR (b
, width_table
) = Qnil
;
1679 BVAR (b
, undo_list
) = Qnil
;
1681 /* Run buffer-list-update-hook. */
1682 if (!NILP (Vrun_hooks
))
1683 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1688 /* Move association for BUFFER to the front of buffer (a)lists. Since
1689 we do this each time BUFFER is selected visibly, the more recently
1690 selected buffers are always closer to the front of those lists. This
1691 means that other_buffer is more likely to choose a relevant buffer.
1693 Note that this moves BUFFER to the front of the buffer lists of the
1694 selected frame even if BUFFER is not shown there. If BUFFER is not
1695 shown in the selected frame, consider the present behavior a feature.
1696 `select-window' gets this right since it shows BUFFER in the selected
1697 window when calling us. */
1700 record_buffer (Lisp_Object buffer
)
1702 Lisp_Object aelt
, aelt_cons
, tem
;
1703 register struct frame
*f
= XFRAME (selected_frame
);
1705 CHECK_BUFFER (buffer
);
1707 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1708 Don't allow quitting since this might leave the buffer list in an
1709 inconsistent state. */
1710 tem
= Vinhibit_quit
;
1712 aelt
= Frassq (buffer
, Vbuffer_alist
);
1713 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1714 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1715 XSETCDR (aelt_cons
, Vbuffer_alist
);
1716 Vbuffer_alist
= aelt_cons
;
1717 Vinhibit_quit
= tem
;
1719 /* Update buffer list of selected frame. */
1720 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1721 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1723 /* Run buffer-list-update-hook. */
1724 if (!NILP (Vrun_hooks
))
1725 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1729 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1730 buffer is killed. For the selected frame's buffer list this moves
1731 BUFFER to its end even if it was never shown in that frame. If
1732 this happens we have a feature, hence `bury-buffer-internal' should be
1733 called only when BUFFER was shown in the selected frame. */
1735 DEFUN ("bury-buffer-internal", Fbury_buffer_internal
, Sbury_buffer_internal
,
1737 doc
: /* Move BUFFER to the end of the buffer list. */)
1738 (Lisp_Object buffer
)
1740 Lisp_Object aelt
, aelt_cons
, tem
;
1741 register struct frame
*f
= XFRAME (selected_frame
);
1743 CHECK_BUFFER (buffer
);
1745 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1746 Don't allow quitting since this might leave the buffer list in an
1747 inconsistent state. */
1748 tem
= Vinhibit_quit
;
1750 aelt
= Frassq (buffer
, Vbuffer_alist
);
1751 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1752 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1753 XSETCDR (aelt_cons
, Qnil
);
1754 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1755 Vinhibit_quit
= tem
;
1757 /* Update buffer lists of selected frame. */
1758 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1759 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1761 /* Run buffer-list-update-hook. */
1762 if (!NILP (Vrun_hooks
))
1763 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1768 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1769 doc
: /* Set an appropriate major mode for BUFFER.
1770 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1771 according to `default-major-mode'.
1772 Use this function before selecting the buffer, since it may need to inspect
1773 the current buffer's major mode. */)
1774 (Lisp_Object buffer
)
1777 Lisp_Object function
;
1779 CHECK_BUFFER (buffer
);
1781 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1782 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1783 function
= find_symbol_value (intern ("initial-major-mode"));
1786 function
= BVAR (&buffer_defaults
, major_mode
);
1788 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1789 function
= BVAR (current_buffer
, major_mode
);
1792 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1795 count
= SPECPDL_INDEX ();
1797 /* To select a nonfundamental mode,
1798 select the buffer temporarily and then call the mode function. */
1800 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1802 Fset_buffer (buffer
);
1805 return unbind_to (count
, Qnil
);
1808 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1809 doc
: /* Return the current buffer as a Lisp object. */)
1812 register Lisp_Object buf
;
1813 XSETBUFFER (buf
, current_buffer
);
1817 /* Set the current buffer to B.
1819 We previously set windows_or_buffers_changed here to invalidate
1820 global unchanged information in beg_unchanged and end_unchanged.
1821 This is no longer necessary because we now compute unchanged
1822 information on a buffer-basis. Every action affecting other
1823 windows than the selected one requires a select_window at some
1824 time, and that increments windows_or_buffers_changed. */
1827 set_buffer_internal (register struct buffer
*b
)
1829 if (current_buffer
!= b
)
1830 set_buffer_internal_1 (b
);
1833 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1834 This is used by redisplay. */
1837 set_buffer_internal_1 (register struct buffer
*b
)
1839 register struct buffer
*old_buf
;
1840 register Lisp_Object tail
;
1842 #ifdef USE_MMAP_FOR_BUFFERS
1843 if (b
->text
->beg
== NULL
)
1844 enlarge_buffer_text (b
, 0);
1845 #endif /* USE_MMAP_FOR_BUFFERS */
1847 if (current_buffer
== b
)
1850 old_buf
= current_buffer
;
1852 last_known_column_point
= -1; /* invalidate indentation cache */
1856 /* Put the undo list back in the base buffer, so that it appears
1857 that an indirect buffer shares the undo list of its base. */
1858 if (old_buf
->base_buffer
)
1859 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1861 /* If the old current buffer has markers to record PT, BEGV and ZV
1862 when it is not current, update them now. */
1863 record_buffer_markers (old_buf
);
1866 /* Get the undo list from the base buffer, so that it appears
1867 that an indirect buffer shares the undo list of its base. */
1869 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1871 /* If the new current buffer has markers to record PT, BEGV and ZV
1872 when it is not current, fetch them now. */
1873 fetch_buffer_markers (b
);
1875 /* Look down buffer's list of local Lisp variables
1876 to find and update any that forward into C variables. */
1880 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1882 Lisp_Object var
= XCAR (XCAR (tail
));
1883 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1884 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1885 && SYMBOL_BLV (sym
)->fwd
)
1886 /* Just reference the variable
1887 to cause it to become set for this buffer. */
1888 Fsymbol_value (var
);
1891 /* Do the same with any others that were local to the previous buffer */
1892 while (b
!= old_buf
&& (b
= old_buf
, b
));
1895 /* Switch to buffer B temporarily for redisplay purposes.
1896 This avoids certain things that don't need to be done within redisplay. */
1899 set_buffer_temp (struct buffer
*b
)
1901 register struct buffer
*old_buf
;
1903 if (current_buffer
== b
)
1906 old_buf
= current_buffer
;
1909 /* If the old current buffer has markers to record PT, BEGV and ZV
1910 when it is not current, update them now. */
1911 record_buffer_markers (old_buf
);
1913 /* If the new current buffer has markers to record PT, BEGV and ZV
1914 when it is not current, fetch them now. */
1915 fetch_buffer_markers (b
);
1918 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1919 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1920 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1921 also `save-excursion' when you want to make a buffer current
1922 temporarily. This function does not display the buffer, so its effect
1923 ends when the current command terminates. Use `switch-to-buffer' or
1924 `pop-to-buffer' to switch buffers permanently. */)
1925 (register Lisp_Object buffer_or_name
)
1927 register Lisp_Object buffer
;
1928 buffer
= Fget_buffer (buffer_or_name
);
1930 nsberror (buffer_or_name
);
1931 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1932 error ("Selecting deleted buffer");
1933 set_buffer_internal (XBUFFER (buffer
));
1937 /* Set the current buffer to BUFFER provided it is alive. */
1940 set_buffer_if_live (Lisp_Object buffer
)
1942 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1943 Fset_buffer (buffer
);
1947 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1948 Sbarf_if_buffer_read_only
, 0, 0, 0,
1949 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1952 if (!NILP (BVAR (current_buffer
, read_only
))
1953 && NILP (Vinhibit_read_only
))
1954 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1958 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1959 doc
: /* Delete the entire contents of the current buffer.
1960 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1961 so the buffer is truly empty after this. */)
1968 current_buffer
->last_window_start
= 1;
1969 /* Prevent warnings, or suspension of auto saving, that would happen
1970 if future size is less than past size. Use of erase-buffer
1971 implies that the future text is not really related to the past text. */
1972 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1977 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1979 CHECK_NUMBER_COERCE_MARKER (*b
);
1980 CHECK_NUMBER_COERCE_MARKER (*e
);
1982 if (XINT (*b
) > XINT (*e
))
1985 tem
= *b
; *b
= *e
; *e
= tem
;
1988 if (! (BEGV
<= XINT (*b
) && XINT (*e
) <= ZV
))
1989 args_out_of_range (*b
, *e
);
1992 /* Advance BYTE_POS up to a character boundary
1993 and return the adjusted position. */
1996 advance_to_char_boundary (ptrdiff_t byte_pos
)
2000 if (byte_pos
== BEG
)
2001 /* Beginning of buffer is always a character boundary. */
2004 c
= FETCH_BYTE (byte_pos
);
2005 if (! CHAR_HEAD_P (c
))
2007 /* We should advance BYTE_POS only when C is a constituent of a
2008 multibyte sequence. */
2009 ptrdiff_t orig_byte_pos
= byte_pos
;
2014 c
= FETCH_BYTE (byte_pos
);
2016 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2018 if (byte_pos
< orig_byte_pos
)
2019 byte_pos
= orig_byte_pos
;
2020 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2021 surely advance to the correct character boundary. If C is
2022 not, BYTE_POS was unchanged. */
2028 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2030 doc
: /* Swap the text between current buffer and BUFFER. */)
2031 (Lisp_Object buffer
)
2033 struct buffer
*other_buffer
;
2034 CHECK_BUFFER (buffer
);
2035 other_buffer
= XBUFFER (buffer
);
2037 if (NILP (BVAR (other_buffer
, name
)))
2038 error ("Cannot swap a dead buffer's text");
2040 /* Actually, it probably works just fine.
2041 * if (other_buffer == current_buffer)
2042 * error ("Cannot swap a buffer's text with itself"); */
2044 /* Actually, this may be workable as well, tho probably only if they're
2046 if (other_buffer
->base_buffer
2047 || current_buffer
->base_buffer
)
2048 error ("Cannot swap indirect buffers's text");
2050 { /* This is probably harder to make work. */
2051 struct buffer
*other
;
2052 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2053 if (other
->base_buffer
== other_buffer
2054 || other
->base_buffer
== current_buffer
)
2055 error ("One of the buffers to swap has indirect buffers");
2058 #define swapfield(field, type) \
2060 type tmp##field = other_buffer->field; \
2061 other_buffer->field = current_buffer->field; \
2062 current_buffer->field = tmp##field; \
2064 #define swapfield_(field, type) \
2066 type tmp##field = BVAR (other_buffer, field); \
2067 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2068 BVAR (current_buffer, field) = tmp##field; \
2071 swapfield (own_text
, struct buffer_text
);
2072 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2073 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2075 r_alloc_reset_variable ((void **) ¤t_buffer
->own_text
.beg
,
2076 (void **) &other_buffer
->own_text
.beg
);
2077 r_alloc_reset_variable ((void **) &other_buffer
->own_text
.beg
,
2078 (void **) ¤t_buffer
->own_text
.beg
);
2079 #endif /* REL_ALLOC */
2081 swapfield (pt
, ptrdiff_t);
2082 swapfield (pt_byte
, ptrdiff_t);
2083 swapfield (begv
, ptrdiff_t);
2084 swapfield (begv_byte
, ptrdiff_t);
2085 swapfield (zv
, ptrdiff_t);
2086 swapfield (zv_byte
, ptrdiff_t);
2087 eassert (!current_buffer
->base_buffer
);
2088 eassert (!other_buffer
->base_buffer
);
2089 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2090 swapfield (newline_cache
, struct region_cache
*);
2091 swapfield (width_run_cache
, struct region_cache
*);
2092 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2093 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2094 swapfield (overlays_before
, struct Lisp_Overlay
*);
2095 swapfield (overlays_after
, struct Lisp_Overlay
*);
2096 swapfield (overlay_center
, ptrdiff_t);
2097 swapfield_ (undo_list
, Lisp_Object
);
2098 swapfield_ (mark
, Lisp_Object
);
2099 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2100 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2101 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2102 /* FIXME: Not sure what we should do with these *_marker fields.
2103 Hopefully they're just nil anyway. */
2104 swapfield_ (pt_marker
, Lisp_Object
);
2105 swapfield_ (begv_marker
, Lisp_Object
);
2106 swapfield_ (zv_marker
, Lisp_Object
);
2107 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2108 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2110 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2111 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2112 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2113 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2114 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2115 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2116 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2118 struct Lisp_Marker
*m
;
2119 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2120 if (m
->buffer
== other_buffer
)
2121 m
->buffer
= current_buffer
;
2123 /* Since there's no indirect buffer in sight, markers on
2124 BUF_MARKERS(buf) should either be for `buf' or dead. */
2125 eassert (!m
->buffer
);
2126 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2127 if (m
->buffer
== current_buffer
)
2128 m
->buffer
= other_buffer
;
2130 /* Since there's no indirect buffer in sight, markers on
2131 BUF_MARKERS(buf) should either be for `buf' or dead. */
2132 eassert (!m
->buffer
);
2134 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2135 So since we just swapped the markers between the two buffers, we need
2136 to undo the effect of this swap for window markers. */
2137 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2138 Lisp_Object buf1
, buf2
;
2139 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2141 while (NILP (Fmemq (w
, ws
)))
2144 if (MARKERP (XWINDOW (w
)->pointm
)
2145 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2146 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2147 Fset_marker (XWINDOW (w
)->pointm
,
2148 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2149 XWINDOW (w
)->buffer
);
2150 w
= Fnext_window (w
, Qt
, Qt
);
2154 if (current_buffer
->text
->intervals
)
2155 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2156 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2157 if (other_buffer
->text
->intervals
)
2158 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2159 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2164 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2166 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2167 If FLAG is t, this makes the buffer a multibyte buffer.
2168 If FLAG is nil, this makes the buffer a single-byte buffer.
2169 In these cases, the buffer contents remain unchanged as a sequence of
2170 bytes but the contents viewed as characters do change.
2171 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2172 all eight-bit bytes to eight-bit characters.
2173 If the multibyte flag was really changed, undo information of the
2174 current buffer is cleared. */)
2177 struct Lisp_Marker
*tail
, *markers
;
2178 struct buffer
*other
;
2180 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2181 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2182 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2183 struct gcpro gcpro1
;
2185 if (current_buffer
->base_buffer
)
2186 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2188 /* Do nothing if nothing actually changes. */
2189 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2194 /* Don't record these buffer changes. We will put a special undo entry
2196 BVAR (current_buffer
, undo_list
) = Qt
;
2198 /* If the cached position is for this buffer, clear it out. */
2199 clear_charpos_cache (current_buffer
);
2202 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2204 begv
= BEGV
, zv
= ZV
;
2211 ptrdiff_t pos
, stop
;
2214 /* Do this first, so it can use CHAR_TO_BYTE
2215 to calculate the old correspondences. */
2216 set_intervals_multibyte (0);
2218 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2224 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2227 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2228 tail
->charpos
= tail
->bytepos
;
2230 /* Convert multibyte form of 8-bit characters to unibyte. */
2245 if (ASCII_BYTE_P (*p
))
2247 else if (CHAR_BYTE8_HEAD_P (*p
))
2249 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2250 /* Delete all bytes for this 8-bit character but the
2251 last one, and change the last one to the character
2254 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2266 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2267 p
+= bytes
, pos
+= bytes
;
2271 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2276 ptrdiff_t pos
, stop
;
2277 unsigned char *p
, *pend
;
2279 /* Be sure not to have a multibyte sequence striding over the GAP.
2280 Ex: We change this: "...abc\302 _GAP_ \241def..."
2281 to: "...abc _GAP_ \302\241def..." */
2284 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2285 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2287 unsigned char *q
= GPT_ADDR
- 1;
2289 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2290 if (LEADING_CODE_P (*q
))
2292 ptrdiff_t new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2294 move_gap_both (new_gpt
, new_gpt
);
2298 /* Make the buffer contents valid as multibyte by converting
2299 8-bit characters to multibyte form. */
2317 if (ASCII_BYTE_P (*p
))
2319 else if (EQ (flag
, Qt
)
2320 && ! CHAR_BYTE8_HEAD_P (*p
)
2321 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2322 p
+= bytes
, pos
+= bytes
;
2325 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2328 c
= BYTE8_TO_CHAR (*p
);
2329 bytes
= CHAR_STRING (c
, tmp
);
2331 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2333 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2334 /* Now the gap is after the just inserted data. */
2352 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2354 /* Do this first, so that chars_in_text asks the right question.
2355 set_intervals_multibyte needs it too. */
2356 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2358 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2359 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2361 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2363 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2364 if (BEGV_BYTE
> GPT_BYTE
)
2365 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2367 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2369 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2370 if (ZV_BYTE
> GPT_BYTE
)
2371 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2373 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2376 ptrdiff_t byte
= advance_to_char_boundary (PT_BYTE
);
2379 if (byte
> GPT_BYTE
)
2380 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2382 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2383 TEMP_SET_PT_BOTH (position
, byte
);
2386 tail
= markers
= BUF_MARKERS (current_buffer
);
2388 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2389 getting confused by the markers that have not yet been updated.
2390 It is also a signal that it should never create a marker. */
2391 BUF_MARKERS (current_buffer
) = NULL
;
2393 for (; tail
; tail
= tail
->next
)
2395 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2396 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2399 /* Make sure no markers were put on the chain
2400 while the chain value was incorrect. */
2401 if (BUF_MARKERS (current_buffer
))
2404 BUF_MARKERS (current_buffer
) = markers
;
2406 /* Do this last, so it can calculate the new correspondences
2407 between chars and bytes. */
2408 set_intervals_multibyte (1);
2411 if (!EQ (old_undo
, Qt
))
2413 /* Represent all the above changes by a special undo entry. */
2414 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2415 intern ("set-buffer-multibyte"),
2416 NILP (flag
) ? Qt
: Qnil
),
2422 /* Changing the multibyteness of a buffer means that all windows
2423 showing that buffer must be updated thoroughly. */
2424 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2425 ++windows_or_buffers_changed
;
2427 /* Copy this buffer's new multibyte status
2428 into all of its indirect buffers. */
2429 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2430 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2432 BVAR (other
, enable_multibyte_characters
)
2433 = BVAR (current_buffer
, enable_multibyte_characters
);
2434 other
->prevent_redisplay_optimizations_p
= 1;
2437 /* Restore the modifiedness of the buffer. */
2438 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2439 Fset_buffer_modified_p (Qnil
);
2441 /* Update coding systems of this buffer's process (if any). */
2443 Lisp_Object process
;
2445 process
= Fget_buffer_process (Fcurrent_buffer ());
2446 if (PROCESSP (process
))
2447 setup_process_coding_systems (process
);
2453 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2454 Skill_all_local_variables
, 0, 0, 0,
2455 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2456 Most local variable bindings are eliminated so that the default values
2457 become effective once more. Also, the syntax table is set from
2458 `standard-syntax-table', the local keymap is set to nil,
2459 and the abbrev table from `fundamental-mode-abbrev-table'.
2460 This function also forces redisplay of the mode line.
2462 Every function to select a new major mode starts by
2463 calling this function.
2465 As a special exception, local variables whose names have
2466 a non-nil `permanent-local' property are not eliminated by this function.
2468 The first thing this function does is run
2469 the normal hook `change-major-mode-hook'. */)
2472 Frun_hooks (1, &Qchange_major_mode_hook
);
2474 /* Make sure none of the bindings in local_var_alist
2475 remain swapped in, in their symbols. */
2477 swap_out_buffer_local_variables (current_buffer
);
2479 /* Actually eliminate all local bindings of this buffer. */
2481 reset_buffer_local_variables (current_buffer
, 0);
2483 /* Force mode-line redisplay. Useful here because all major mode
2484 commands call this function. */
2485 update_mode_lines
++;
2490 /* Make sure no local variables remain set up with buffer B
2491 for their current values. */
2494 swap_out_buffer_local_variables (struct buffer
*b
)
2496 Lisp_Object oalist
, alist
, buffer
;
2498 XSETBUFFER (buffer
, b
);
2499 oalist
= BVAR (b
, local_var_alist
);
2501 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2503 Lisp_Object sym
= XCAR (XCAR (alist
));
2504 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2505 /* Need not do anything if some other buffer's binding is
2507 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2509 /* Symbol is set up for this buffer's old local value:
2511 swap_in_global_binding (XSYMBOL (sym
));
2516 /* Find all the overlays in the current buffer that contain position POS.
2517 Return the number found, and store them in a vector in *VEC_PTR.
2518 Store in *LEN_PTR the size allocated for the vector.
2519 Store in *NEXT_PTR the next position after POS where an overlay starts,
2520 or ZV if there are no more overlays between POS and ZV.
2521 Store in *PREV_PTR the previous position before POS where an overlay ends,
2522 or where an overlay starts which ends at or after POS;
2523 or BEGV if there are no such overlays from BEGV to POS.
2524 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2526 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2527 when this function is called.
2529 If EXTEND is non-zero, we make the vector bigger if necessary.
2530 If EXTEND is zero, we never extend the vector,
2531 and we store only as many overlays as will fit.
2532 But we still return the total number of overlays.
2534 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2535 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2536 default (BEGV or ZV). */
2539 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
,
2541 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
, int change_req
)
2543 Lisp_Object overlay
, start
, end
;
2544 struct Lisp_Overlay
*tail
;
2546 ptrdiff_t len
= *len_ptr
;
2547 Lisp_Object
*vec
= *vec_ptr
;
2548 ptrdiff_t next
= ZV
;
2549 ptrdiff_t prev
= BEGV
;
2550 int inhibit_storing
= 0;
2552 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2554 ptrdiff_t startpos
, endpos
;
2556 XSETMISC (overlay
, tail
);
2558 start
= OVERLAY_START (overlay
);
2559 end
= OVERLAY_END (overlay
);
2560 endpos
= OVERLAY_POSITION (end
);
2567 startpos
= OVERLAY_POSITION (start
);
2568 /* This one ends at or after POS
2569 so its start counts for PREV_PTR if it's before POS. */
2570 if (prev
< startpos
&& startpos
< pos
)
2574 if (startpos
<= pos
)
2578 /* The supplied vector is full.
2579 Either make it bigger, or don't store any more in it. */
2582 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2588 inhibit_storing
= 1;
2591 if (!inhibit_storing
)
2593 /* Keep counting overlays even if we can't return them all. */
2596 else if (startpos
< next
)
2600 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2602 ptrdiff_t startpos
, endpos
;
2604 XSETMISC (overlay
, tail
);
2606 start
= OVERLAY_START (overlay
);
2607 end
= OVERLAY_END (overlay
);
2608 startpos
= OVERLAY_POSITION (start
);
2611 if (startpos
< next
)
2615 endpos
= OVERLAY_POSITION (end
);
2622 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2628 inhibit_storing
= 1;
2631 if (!inhibit_storing
)
2635 if (startpos
< pos
&& startpos
> prev
)
2638 else if (endpos
< pos
&& endpos
> prev
)
2640 else if (endpos
== pos
&& startpos
> prev
2641 && (!change_req
|| startpos
< pos
))
2652 /* Find all the overlays in the current buffer that overlap the range
2653 BEG-END, or are empty at BEG, or are empty at END provided END
2654 denotes the position at the end of the current buffer.
2656 Return the number found, and store them in a vector in *VEC_PTR.
2657 Store in *LEN_PTR the size allocated for the vector.
2658 Store in *NEXT_PTR the next position after POS where an overlay starts,
2659 or ZV if there are no more overlays.
2660 Store in *PREV_PTR the previous position before POS where an overlay ends,
2661 or BEGV if there are no previous overlays.
2662 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2664 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2665 when this function is called.
2667 If EXTEND is non-zero, we make the vector bigger if necessary.
2668 If EXTEND is zero, we never extend the vector,
2669 and we store only as many overlays as will fit.
2670 But we still return the total number of overlays. */
2673 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2674 Lisp_Object
**vec_ptr
, ptrdiff_t *len_ptr
,
2675 ptrdiff_t *next_ptr
, ptrdiff_t *prev_ptr
)
2677 Lisp_Object overlay
, ostart
, oend
;
2678 struct Lisp_Overlay
*tail
;
2680 ptrdiff_t len
= *len_ptr
;
2681 Lisp_Object
*vec
= *vec_ptr
;
2682 ptrdiff_t next
= ZV
;
2683 ptrdiff_t prev
= BEGV
;
2684 int inhibit_storing
= 0;
2685 int end_is_Z
= end
== Z
;
2687 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2689 ptrdiff_t startpos
, endpos
;
2691 XSETMISC (overlay
, tail
);
2693 ostart
= OVERLAY_START (overlay
);
2694 oend
= OVERLAY_END (overlay
);
2695 endpos
= OVERLAY_POSITION (oend
);
2702 startpos
= OVERLAY_POSITION (ostart
);
2703 /* Count an interval if it overlaps the range, is empty at the
2704 start of the range, or is empty at END provided END denotes the
2705 end of the buffer. */
2706 if ((beg
< endpos
&& startpos
< end
)
2707 || (startpos
== endpos
2708 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2712 /* The supplied vector is full.
2713 Either make it bigger, or don't store any more in it. */
2716 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2722 inhibit_storing
= 1;
2725 if (!inhibit_storing
)
2727 /* Keep counting overlays even if we can't return them all. */
2730 else if (startpos
< next
)
2734 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2736 ptrdiff_t startpos
, endpos
;
2738 XSETMISC (overlay
, tail
);
2740 ostart
= OVERLAY_START (overlay
);
2741 oend
= OVERLAY_END (overlay
);
2742 startpos
= OVERLAY_POSITION (ostart
);
2745 if (startpos
< next
)
2749 endpos
= OVERLAY_POSITION (oend
);
2750 /* Count an interval if it overlaps the range, is empty at the
2751 start of the range, or is empty at END provided END denotes the
2752 end of the buffer. */
2753 if ((beg
< endpos
&& startpos
< end
)
2754 || (startpos
== endpos
2755 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2761 vec
= xpalloc (vec
, len_ptr
, 1, OVERLAY_COUNT_MAX
,
2767 inhibit_storing
= 1;
2770 if (!inhibit_storing
)
2774 else if (endpos
< beg
&& endpos
> prev
)
2786 /* Return non-zero if there exists an overlay with a non-nil
2787 `mouse-face' property overlapping OVERLAY. */
2790 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2792 ptrdiff_t start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2793 ptrdiff_t end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2794 ptrdiff_t n
, i
, size
;
2795 Lisp_Object
*v
, tem
;
2798 v
= alloca (size
* sizeof *v
);
2799 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2802 v
= alloca (n
* sizeof *v
);
2803 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2806 for (i
= 0; i
< n
; ++i
)
2807 if (!EQ (v
[i
], overlay
)
2808 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2817 /* Fast function to just test if we're at an overlay boundary. */
2819 overlay_touches_p (ptrdiff_t pos
)
2821 Lisp_Object overlay
;
2822 struct Lisp_Overlay
*tail
;
2824 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2828 XSETMISC (overlay
,tail
);
2829 if (!OVERLAYP (overlay
))
2832 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2835 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2839 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2843 XSETMISC (overlay
, tail
);
2844 if (!OVERLAYP (overlay
))
2847 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2850 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2858 Lisp_Object overlay
;
2864 compare_overlays (const void *v1
, const void *v2
)
2866 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2867 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2868 if (s1
->priority
!= s2
->priority
)
2869 return s1
->priority
< s2
->priority
? -1 : 1;
2870 if (s1
->beg
!= s2
->beg
)
2871 return s1
->beg
< s2
->beg
? -1 : 1;
2872 if (s1
->end
!= s2
->end
)
2873 return s2
->end
< s1
->end
? -1 : 1;
2874 /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
2875 between "equal" overlays. The result can still change between
2876 invocations of Emacs, but it won't change in the middle of
2877 `find_field' (bug#6830). */
2878 if (XHASH (s1
->overlay
) != XHASH (s2
->overlay
))
2879 return XHASH (s1
->overlay
) < XHASH (s2
->overlay
) ? -1 : 1;
2883 /* Sort an array of overlays by priority. The array is modified in place.
2884 The return value is the new size; this may be smaller than the original
2885 size if some of the overlays were invalid or were window-specific. */
2887 sort_overlays (Lisp_Object
*overlay_vec
, ptrdiff_t noverlays
, struct window
*w
)
2890 struct sortvec
*sortvec
= alloca (noverlays
* sizeof *sortvec
);
2892 /* Put the valid and relevant overlays into sortvec. */
2894 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2897 Lisp_Object overlay
;
2899 overlay
= overlay_vec
[i
];
2900 if (OVERLAY_VALID (overlay
)
2901 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2902 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2904 /* If we're interested in a specific window, then ignore
2905 overlays that are limited to some other window. */
2910 window
= Foverlay_get (overlay
, Qwindow
);
2911 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2915 /* This overlay is good and counts: put it into sortvec. */
2916 sortvec
[j
].overlay
= overlay
;
2917 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2918 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2919 tem
= Foverlay_get (overlay
, Qpriority
);
2921 sortvec
[j
].priority
= XINT (tem
);
2923 sortvec
[j
].priority
= 0;
2929 /* Sort the overlays into the proper order: increasing priority. */
2932 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2934 for (i
= 0; i
< noverlays
; i
++)
2935 overlay_vec
[i
] = sortvec
[i
].overlay
;
2941 Lisp_Object string
, string2
;
2948 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2949 ptrdiff_t size
; /* Allocated length of that array. */
2950 ptrdiff_t used
; /* How much of the array is currently in use. */
2951 ptrdiff_t bytes
; /* Total length of the strings in buf. */
2954 /* Buffers for storing information about the overlays touching a given
2955 position. These could be automatic variables in overlay_strings, but
2956 it's more efficient to hold onto the memory instead of repeatedly
2957 allocating and freeing it. */
2958 static struct sortstrlist overlay_heads
, overlay_tails
;
2959 static unsigned char *overlay_str_buf
;
2961 /* Allocated length of overlay_str_buf. */
2962 static ptrdiff_t overlay_str_len
;
2964 /* A comparison function suitable for passing to qsort. */
2966 cmp_for_strings (const void *as1
, const void *as2
)
2968 struct sortstr
*s1
= (struct sortstr
*)as1
;
2969 struct sortstr
*s2
= (struct sortstr
*)as2
;
2970 if (s1
->size
!= s2
->size
)
2971 return s2
->size
< s1
->size
? -1 : 1;
2972 if (s1
->priority
!= s2
->priority
)
2973 return s1
->priority
< s2
->priority
? -1 : 1;
2978 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2979 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2983 if (ssl
->used
== ssl
->size
)
2984 ssl
->buf
= xpalloc (ssl
->buf
, &ssl
->size
, 5, -1, sizeof *ssl
->buf
);
2985 ssl
->buf
[ssl
->used
].string
= str
;
2986 ssl
->buf
[ssl
->used
].string2
= str2
;
2987 ssl
->buf
[ssl
->used
].size
= size
;
2988 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2991 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2992 nbytes
= SCHARS (str
);
2993 else if (! STRING_MULTIBYTE (str
))
2994 nbytes
= count_size_as_multibyte (SDATA (str
),
2997 nbytes
= SBYTES (str
);
2999 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3000 memory_full (SIZE_MAX
);
3001 ssl
->bytes
+= nbytes
;
3005 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3006 nbytes
= SCHARS (str2
);
3007 else if (! STRING_MULTIBYTE (str2
))
3008 nbytes
= count_size_as_multibyte (SDATA (str2
),
3011 nbytes
= SBYTES (str2
);
3013 if (INT_ADD_OVERFLOW (ssl
->bytes
, nbytes
))
3014 memory_full (SIZE_MAX
);
3015 ssl
->bytes
+= nbytes
;
3019 /* Return the concatenation of the strings associated with overlays that
3020 begin or end at POS, ignoring overlays that are specific to a window
3021 other than W. The strings are concatenated in the appropriate order:
3022 shorter overlays nest inside longer ones, and higher priority inside
3023 lower. Normally all of the after-strings come first, but zero-sized
3024 overlays have their after-strings ride along with the before-strings
3025 because it would look strange to print them inside-out.
3027 Returns the string length, and stores the contents indirectly through
3028 PSTR, if that variable is non-null. The string may be overwritten by
3029 subsequent calls. */
3032 overlay_strings (ptrdiff_t pos
, struct window
*w
, unsigned char **pstr
)
3034 Lisp_Object overlay
, window
, str
;
3035 struct Lisp_Overlay
*ov
;
3036 ptrdiff_t startpos
, endpos
;
3037 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3039 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3040 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3041 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3043 XSETMISC (overlay
, ov
);
3044 eassert (OVERLAYP (overlay
));
3046 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3047 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3050 if (endpos
!= pos
&& startpos
!= pos
)
3052 window
= Foverlay_get (overlay
, Qwindow
);
3053 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3056 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3057 record_overlay_string (&overlay_heads
, str
,
3059 ? Foverlay_get (overlay
, Qafter_string
)
3061 Foverlay_get (overlay
, Qpriority
),
3063 else if (endpos
== pos
3064 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3065 record_overlay_string (&overlay_tails
, str
, Qnil
,
3066 Foverlay_get (overlay
, Qpriority
),
3069 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3071 XSETMISC (overlay
, ov
);
3072 eassert (OVERLAYP (overlay
));
3074 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3075 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3078 if (endpos
!= pos
&& startpos
!= pos
)
3080 window
= Foverlay_get (overlay
, Qwindow
);
3081 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3084 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3085 record_overlay_string (&overlay_heads
, str
,
3087 ? Foverlay_get (overlay
, Qafter_string
)
3089 Foverlay_get (overlay
, Qpriority
),
3091 else if (endpos
== pos
3092 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3093 record_overlay_string (&overlay_tails
, str
, Qnil
,
3094 Foverlay_get (overlay
, Qpriority
),
3097 if (overlay_tails
.used
> 1)
3098 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3100 if (overlay_heads
.used
> 1)
3101 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3103 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3110 if (INT_ADD_OVERFLOW (overlay_heads
.bytes
, overlay_tails
.bytes
))
3111 memory_full (SIZE_MAX
);
3112 total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3113 if (total
> overlay_str_len
)
3114 overlay_str_buf
= xpalloc (overlay_str_buf
, &overlay_str_len
,
3115 total
- overlay_str_len
, -1, 1);
3117 p
= overlay_str_buf
;
3118 for (i
= overlay_tails
.used
; --i
>= 0;)
3121 tem
= overlay_tails
.buf
[i
].string
;
3122 nbytes
= copy_text (SDATA (tem
), p
,
3124 STRING_MULTIBYTE (tem
), multibyte
);
3127 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3130 tem
= overlay_heads
.buf
[i
].string
;
3131 nbytes
= copy_text (SDATA (tem
), p
,
3133 STRING_MULTIBYTE (tem
), multibyte
);
3135 tem
= overlay_heads
.buf
[i
].string2
;
3138 nbytes
= copy_text (SDATA (tem
), p
,
3140 STRING_MULTIBYTE (tem
), multibyte
);
3144 if (p
!= overlay_str_buf
+ total
)
3147 *pstr
= overlay_str_buf
;
3153 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3156 recenter_overlay_lists (struct buffer
*buf
, ptrdiff_t pos
)
3158 Lisp_Object overlay
, beg
, end
;
3159 struct Lisp_Overlay
*prev
, *tail
, *next
;
3161 /* See if anything in overlays_before should move to overlays_after. */
3163 /* We don't strictly need prev in this loop; it should always be nil.
3164 But we use it for symmetry and in case that should cease to be true
3165 with some future change. */
3167 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3170 XSETMISC (overlay
, tail
);
3172 /* If the overlay is not valid, get rid of it. */
3173 if (!OVERLAY_VALID (overlay
))
3178 /* Splice the cons cell TAIL out of overlays_before. */
3182 buf
->overlays_before
= next
;
3188 beg
= OVERLAY_START (overlay
);
3189 end
= OVERLAY_END (overlay
);
3191 if (OVERLAY_POSITION (end
) > pos
)
3193 /* OVERLAY needs to be moved. */
3194 ptrdiff_t where
= OVERLAY_POSITION (beg
);
3195 struct Lisp_Overlay
*other
, *other_prev
;
3197 /* Splice the cons cell TAIL out of overlays_before. */
3201 buf
->overlays_before
= next
;
3203 /* Search thru overlays_after for where to put it. */
3205 for (other
= buf
->overlays_after
; other
;
3206 other_prev
= other
, other
= other
->next
)
3208 Lisp_Object otherbeg
, otheroverlay
;
3210 XSETMISC (otheroverlay
, other
);
3211 eassert (OVERLAY_VALID (otheroverlay
));
3213 otherbeg
= OVERLAY_START (otheroverlay
);
3214 if (OVERLAY_POSITION (otherbeg
) >= where
)
3218 /* Add TAIL to overlays_after before OTHER. */
3221 other_prev
->next
= tail
;
3223 buf
->overlays_after
= tail
;
3227 /* We've reached the things that should stay in overlays_before.
3228 All the rest of overlays_before must end even earlier,
3233 /* See if anything in overlays_after should be in overlays_before. */
3235 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3238 XSETMISC (overlay
, tail
);
3240 /* If the overlay is not valid, get rid of it. */
3241 if (!OVERLAY_VALID (overlay
))
3246 /* Splice the cons cell TAIL out of overlays_after. */
3250 buf
->overlays_after
= next
;
3256 beg
= OVERLAY_START (overlay
);
3257 end
= OVERLAY_END (overlay
);
3259 /* Stop looking, when we know that nothing further
3260 can possibly end before POS. */
3261 if (OVERLAY_POSITION (beg
) > pos
)
3264 if (OVERLAY_POSITION (end
) <= pos
)
3266 /* OVERLAY needs to be moved. */
3267 ptrdiff_t where
= OVERLAY_POSITION (end
);
3268 struct Lisp_Overlay
*other
, *other_prev
;
3270 /* Splice the cons cell TAIL out of overlays_after. */
3274 buf
->overlays_after
= next
;
3276 /* Search thru overlays_before for where to put it. */
3278 for (other
= buf
->overlays_before
; other
;
3279 other_prev
= other
, other
= other
->next
)
3281 Lisp_Object otherend
, otheroverlay
;
3283 XSETMISC (otheroverlay
, other
);
3284 eassert (OVERLAY_VALID (otheroverlay
));
3286 otherend
= OVERLAY_END (otheroverlay
);
3287 if (OVERLAY_POSITION (otherend
) <= where
)
3291 /* Add TAIL to overlays_before before OTHER. */
3294 other_prev
->next
= tail
;
3296 buf
->overlays_before
= tail
;
3301 buf
->overlay_center
= pos
;
3305 adjust_overlays_for_insert (ptrdiff_t pos
, ptrdiff_t length
)
3307 /* After an insertion, the lists are still sorted properly,
3308 but we may need to update the value of the overlay center. */
3309 if (current_buffer
->overlay_center
>= pos
)
3310 current_buffer
->overlay_center
+= length
;
3314 adjust_overlays_for_delete (ptrdiff_t pos
, ptrdiff_t length
)
3316 if (current_buffer
->overlay_center
< pos
)
3317 /* The deletion was to our right. No change needed; the before- and
3318 after-lists are still consistent. */
3320 else if (current_buffer
->overlay_center
- pos
> length
)
3321 /* The deletion was to our left. We need to adjust the center value
3322 to account for the change in position, but the lists are consistent
3323 given the new value. */
3324 current_buffer
->overlay_center
-= length
;
3326 /* We're right in the middle. There might be things on the after-list
3327 that now belong on the before-list. Recentering will move them,
3328 and also update the center point. */
3329 recenter_overlay_lists (current_buffer
, pos
);
3332 /* Fix up overlays that were garbled as a result of permuting markers
3333 in the range START through END. Any overlay with at least one
3334 endpoint in this range will need to be unlinked from the overlay
3335 list and reinserted in its proper place.
3336 Such an overlay might even have negative size at this point.
3337 If so, we'll make the overlay empty. */
3339 fix_start_end_in_overlays (register ptrdiff_t start
, register ptrdiff_t end
)
3341 Lisp_Object overlay
;
3342 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3343 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3344 /* These are either nil, indicating that before_list or after_list
3345 should be assigned, or the cons cell the cdr of which should be
3347 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3348 /* 'Parent', likewise, indicates a cons cell or
3349 current_buffer->overlays_before or overlays_after, depending
3350 which loop we're in. */
3351 struct Lisp_Overlay
*tail
, *parent
;
3352 ptrdiff_t startpos
, endpos
;
3354 /* This algorithm shifts links around instead of consing and GCing.
3355 The loop invariant is that before_list (resp. after_list) is a
3356 well-formed list except that its last element, the CDR of beforep
3357 (resp. afterp) if beforep (afterp) isn't nil or before_list
3358 (after_list) if it is, is still uninitialized. So it's not a bug
3359 that before_list isn't initialized, although it may look
3361 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3363 XSETMISC (overlay
, tail
);
3365 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3366 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3368 /* If the overlay is backwards, make it empty. */
3369 if (endpos
< startpos
)
3372 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3380 || (startpos
>= start
&& startpos
< end
))
3382 /* Add it to the end of the wrong list. Later on,
3383 recenter_overlay_lists will move it to the right place. */
3384 if (endpos
< current_buffer
->overlay_center
)
3389 afterp
->next
= tail
;
3397 beforep
->next
= tail
;
3401 current_buffer
->overlays_before
= tail
->next
;
3403 parent
->next
= tail
->next
;
3407 parent
= tail
, tail
= parent
->next
;
3409 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3411 XSETMISC (overlay
, tail
);
3413 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3414 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3416 /* If the overlay is backwards, make it empty. */
3417 if (endpos
< startpos
)
3420 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3424 if (startpos
>= end
)
3427 if (startpos
>= start
3428 || (endpos
>= start
&& endpos
< end
))
3430 if (endpos
< current_buffer
->overlay_center
)
3435 afterp
->next
= tail
;
3443 beforep
->next
= tail
;
3447 current_buffer
->overlays_after
= tail
->next
;
3449 parent
->next
= tail
->next
;
3453 parent
= tail
, tail
= parent
->next
;
3456 /* Splice the constructed (wrong) lists into the buffer's lists,
3457 and let the recenter function make it sane again. */
3460 beforep
->next
= current_buffer
->overlays_before
;
3461 current_buffer
->overlays_before
= before_list
;
3463 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3467 afterp
->next
= current_buffer
->overlays_after
;
3468 current_buffer
->overlays_after
= after_list
;
3470 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3473 /* We have two types of overlay: the one whose ending marker is
3474 after-insertion-marker (this is the usual case) and the one whose
3475 ending marker is before-insertion-marker. When `overlays_before'
3476 contains overlays of the latter type and the former type in this
3477 order and both overlays end at inserting position, inserting a text
3478 increases only the ending marker of the latter type, which results
3479 in incorrect ordering of `overlays_before'.
3481 This function fixes ordering of overlays in the slot
3482 `overlays_before' of the buffer *BP. Before the insertion, `point'
3483 was at PREV, and now is at POS. */
3486 fix_overlays_before (struct buffer
*bp
, ptrdiff_t prev
, ptrdiff_t pos
)
3488 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3489 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3491 ptrdiff_t end
IF_LINT (= 0);
3493 /* After the insertion, the several overlays may be in incorrect
3494 order. The possibility is that, in the list `overlays_before',
3495 an overlay which ends at POS appears after an overlay which ends
3496 at PREV. Since POS is greater than PREV, we must fix the
3497 ordering of these overlays, by moving overlays ends at POS before
3498 the overlays ends at PREV. */
3500 /* At first, find a place where disordered overlays should be linked
3501 in. It is where an overlay which end before POS exists. (i.e. an
3502 overlay whose ending marker is after-insertion-marker if disorder
3505 && (XSETMISC (tem
, tail
),
3506 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3512 /* If we don't find such an overlay,
3513 or the found one ends before PREV,
3514 or the found one is the last one in the list,
3515 we don't have to fix anything. */
3516 if (!tail
|| end
< prev
|| !tail
->next
)
3519 right_pair
= parent
;
3523 /* Now, end position of overlays in the list TAIL should be before
3524 or equal to PREV. In the loop, an overlay which ends at POS is
3525 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3526 we found an overlay which ends before PREV, the remaining
3527 overlays are in correct order. */
3530 XSETMISC (tem
, tail
);
3531 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3534 { /* This overlay is disordered. */
3535 struct Lisp_Overlay
*found
= tail
;
3537 /* Unlink the found overlay. */
3539 parent
->next
= tail
;
3540 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3541 and link it into the right place. */
3544 found
->next
= bp
->overlays_before
;
3545 bp
->overlays_before
= found
;
3549 found
->next
= right_pair
->next
;
3550 right_pair
->next
= found
;
3553 else if (end
== prev
)
3558 else /* No more disordered overlay. */
3563 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3564 doc
: /* Return t if OBJECT is an overlay. */)
3565 (Lisp_Object object
)
3567 return (OVERLAYP (object
) ? Qt
: Qnil
);
3570 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3571 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3572 If omitted, BUFFER defaults to the current buffer.
3573 BEG and END may be integers or markers.
3574 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3575 for the front of the overlay advance when text is inserted there
3576 \(which means the text *is not* included in the overlay).
3577 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3578 for the rear of the overlay advance when text is inserted there
3579 \(which means the text *is* included in the overlay). */)
3580 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3582 Lisp_Object overlay
;
3586 XSETBUFFER (buffer
, current_buffer
);
3588 CHECK_BUFFER (buffer
);
3590 && ! EQ (Fmarker_buffer (beg
), buffer
))
3591 error ("Marker points into wrong buffer");
3593 && ! EQ (Fmarker_buffer (end
), buffer
))
3594 error ("Marker points into wrong buffer");
3596 CHECK_NUMBER_COERCE_MARKER (beg
);
3597 CHECK_NUMBER_COERCE_MARKER (end
);
3599 if (XINT (beg
) > XINT (end
))
3602 temp
= beg
; beg
= end
; end
= temp
;
3605 b
= XBUFFER (buffer
);
3607 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3608 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3610 if (!NILP (front_advance
))
3611 XMARKER (beg
)->insertion_type
= 1;
3612 if (!NILP (rear_advance
))
3613 XMARKER (end
)->insertion_type
= 1;
3615 overlay
= allocate_misc ();
3616 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3617 XOVERLAY (overlay
)->start
= beg
;
3618 XOVERLAY (overlay
)->end
= end
;
3619 XOVERLAY (overlay
)->plist
= Qnil
;
3620 XOVERLAY (overlay
)->next
= NULL
;
3622 /* Put the new overlay on the wrong list. */
3623 end
= OVERLAY_END (overlay
);
3624 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3626 if (b
->overlays_after
)
3627 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3628 b
->overlays_after
= XOVERLAY (overlay
);
3632 if (b
->overlays_before
)
3633 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3634 b
->overlays_before
= XOVERLAY (overlay
);
3637 /* This puts it in the right list, and in the right order. */
3638 recenter_overlay_lists (b
, b
->overlay_center
);
3640 /* We don't need to redisplay the region covered by the overlay, because
3641 the overlay has no properties at the moment. */
3646 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3649 modify_overlay (struct buffer
*buf
, ptrdiff_t start
, ptrdiff_t end
)
3653 ptrdiff_t temp
= start
;
3658 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3660 /* If this is a buffer not in the selected window,
3661 we must do other windows. */
3662 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3663 windows_or_buffers_changed
= 1;
3664 /* If multiple windows show this buffer, we must do other windows. */
3665 else if (buffer_shared
> 1)
3666 windows_or_buffers_changed
= 1;
3667 /* If we modify an overlay at the end of the buffer, we cannot
3668 be sure that window end is still valid. */
3669 else if (end
>= ZV
&& start
<= ZV
)
3670 windows_or_buffers_changed
= 1;
3672 ++BUF_OVERLAY_MODIFF (buf
);
3675 /* Remove OVERLAY from LIST. */
3677 static struct Lisp_Overlay
*
3678 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3680 register struct Lisp_Overlay
*tail
, **prev
= &list
;
3682 for (tail
= list
; tail
; prev
= &tail
->next
, tail
= *prev
)
3683 if (tail
== overlay
)
3685 *prev
= overlay
->next
;
3686 overlay
->next
= NULL
;
3692 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3693 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3694 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3695 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3697 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3699 struct buffer
*b
, *ob
= 0;
3700 Lisp_Object obuffer
;
3701 ptrdiff_t count
= SPECPDL_INDEX ();
3702 ptrdiff_t n_beg
, n_end
, o_beg
IF_LINT (= 0), o_end
IF_LINT (= 0);
3704 CHECK_OVERLAY (overlay
);
3706 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3708 XSETBUFFER (buffer
, current_buffer
);
3709 CHECK_BUFFER (buffer
);
3711 if (NILP (Fbuffer_live_p (buffer
)))
3712 error ("Attempt to move overlay to a dead buffer");
3715 && ! EQ (Fmarker_buffer (beg
), buffer
))
3716 error ("Marker points into wrong buffer");
3718 && ! EQ (Fmarker_buffer (end
), buffer
))
3719 error ("Marker points into wrong buffer");
3721 CHECK_NUMBER_COERCE_MARKER (beg
);
3722 CHECK_NUMBER_COERCE_MARKER (end
);
3724 if (XINT (beg
) > XINT (end
))
3727 temp
= beg
; beg
= end
; end
= temp
;
3730 specbind (Qinhibit_quit
, Qt
);
3732 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3733 b
= XBUFFER (buffer
);
3735 if (!NILP (obuffer
))
3737 ob
= XBUFFER (obuffer
);
3739 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3740 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3742 ob
->overlays_before
=
3743 unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3744 ob
->overlays_after
=
3745 unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3746 eassert (XOVERLAY (overlay
)->next
== NULL
);
3749 /* Set the overlay boundaries, which may clip them. */
3750 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3751 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3753 n_beg
= marker_position (OVERLAY_START (overlay
));
3754 n_end
= marker_position (OVERLAY_END (overlay
));
3756 /* If the overlay has changed buffers, do a thorough redisplay. */
3757 if (!EQ (buffer
, obuffer
))
3759 /* Redisplay where the overlay was. */
3761 modify_overlay (ob
, o_beg
, o_end
);
3763 /* Redisplay where the overlay is going to be. */
3764 modify_overlay (b
, n_beg
, n_end
);
3767 /* Redisplay the area the overlay has just left, or just enclosed. */
3770 modify_overlay (b
, o_end
, n_end
);
3771 else if (o_end
== n_end
)
3772 modify_overlay (b
, o_beg
, n_beg
);
3774 modify_overlay (b
, min (o_beg
, n_beg
), max (o_end
, n_end
));
3777 /* Delete the overlay if it is empty after clipping and has the
3778 evaporate property. */
3779 if (n_beg
== n_end
&& !NILP (Foverlay_get (overlay
, Qevaporate
)))
3780 return unbind_to (count
, Fdelete_overlay (overlay
));
3782 /* Put the overlay into the new buffer's overlay lists, first on the
3784 if (n_end
< b
->overlay_center
)
3786 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3787 b
->overlays_after
= XOVERLAY (overlay
);
3791 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3792 b
->overlays_before
= XOVERLAY (overlay
);
3795 /* This puts it in the right list, and in the right order. */
3796 recenter_overlay_lists (b
, b
->overlay_center
);
3798 return unbind_to (count
, overlay
);
3801 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3802 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3803 (Lisp_Object overlay
)
3807 ptrdiff_t count
= SPECPDL_INDEX ();
3809 CHECK_OVERLAY (overlay
);
3811 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3815 b
= XBUFFER (buffer
);
3816 specbind (Qinhibit_quit
, Qt
);
3819 = unchain_overlay (b
->overlays_before
, XOVERLAY (overlay
));
3821 = unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3822 eassert (XOVERLAY (overlay
)->next
== NULL
);
3824 drop_overlay (b
, XOVERLAY (overlay
));
3826 /* When deleting an overlay with before or after strings, turn off
3827 display optimizations for the affected buffer, on the basis that
3828 these strings may contain newlines. This is easier to do than to
3829 check for that situation during redisplay. */
3830 if (!windows_or_buffers_changed
3831 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3832 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3833 b
->prevent_redisplay_optimizations_p
= 1;
3835 return unbind_to (count
, Qnil
);
3838 /* Overlay dissection functions. */
3840 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3841 doc
: /* Return the position at which OVERLAY starts. */)
3842 (Lisp_Object overlay
)
3844 CHECK_OVERLAY (overlay
);
3846 return (Fmarker_position (OVERLAY_START (overlay
)));
3849 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3850 doc
: /* Return the position at which OVERLAY ends. */)
3851 (Lisp_Object overlay
)
3853 CHECK_OVERLAY (overlay
);
3855 return (Fmarker_position (OVERLAY_END (overlay
)));
3858 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3859 doc
: /* Return the buffer OVERLAY belongs to.
3860 Return nil if OVERLAY has been deleted. */)
3861 (Lisp_Object overlay
)
3863 CHECK_OVERLAY (overlay
);
3865 return Fmarker_buffer (OVERLAY_START (overlay
));
3868 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3869 doc
: /* Return a list of the properties on OVERLAY.
3870 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3872 (Lisp_Object overlay
)
3874 CHECK_OVERLAY (overlay
);
3876 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3880 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3881 doc
: /* Return a list of the overlays that contain the character at POS. */)
3884 ptrdiff_t len
, noverlays
;
3885 Lisp_Object
*overlay_vec
;
3888 CHECK_NUMBER_COERCE_MARKER (pos
);
3891 /* We can't use alloca here because overlays_at can call xrealloc. */
3892 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3894 /* Put all the overlays we want in a vector in overlay_vec.
3895 Store the length in len. */
3896 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3899 /* Make a list of them all. */
3900 result
= Flist (noverlays
, overlay_vec
);
3902 xfree (overlay_vec
);
3906 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3907 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3908 Overlap means that at least one character is contained within the overlay
3909 and also contained within the specified region.
3910 Empty overlays are included in the result if they are located at BEG,
3911 between BEG and END, or at END provided END denotes the position at the
3912 end of the buffer. */)
3913 (Lisp_Object beg
, Lisp_Object end
)
3915 ptrdiff_t len
, noverlays
;
3916 Lisp_Object
*overlay_vec
;
3919 CHECK_NUMBER_COERCE_MARKER (beg
);
3920 CHECK_NUMBER_COERCE_MARKER (end
);
3923 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3925 /* Put all the overlays we want in a vector in overlay_vec.
3926 Store the length in len. */
3927 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3930 /* Make a list of them all. */
3931 result
= Flist (noverlays
, overlay_vec
);
3933 xfree (overlay_vec
);
3937 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3939 doc
: /* Return the next position after POS where an overlay starts or ends.
3940 If there are no overlay boundaries from POS to (point-max),
3941 the value is (point-max). */)
3944 ptrdiff_t i
, len
, noverlays
;
3946 Lisp_Object
*overlay_vec
;
3948 CHECK_NUMBER_COERCE_MARKER (pos
);
3951 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3953 /* Put all the overlays we want in a vector in overlay_vec.
3954 Store the length in len.
3955 endpos gets the position where the next overlay starts. */
3956 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3959 /* If any of these overlays ends before endpos,
3960 use its ending point instead. */
3961 for (i
= 0; i
< noverlays
; i
++)
3966 oend
= OVERLAY_END (overlay_vec
[i
]);
3967 oendpos
= OVERLAY_POSITION (oend
);
3968 if (oendpos
< endpos
)
3972 xfree (overlay_vec
);
3973 return make_number (endpos
);
3976 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3977 Sprevious_overlay_change
, 1, 1, 0,
3978 doc
: /* Return the previous position before POS where an overlay starts or ends.
3979 If there are no overlay boundaries from (point-min) to POS,
3980 the value is (point-min). */)
3984 Lisp_Object
*overlay_vec
;
3987 CHECK_NUMBER_COERCE_MARKER (pos
);
3989 /* At beginning of buffer, we know the answer;
3990 avoid bug subtracting 1 below. */
3991 if (XINT (pos
) == BEGV
)
3995 overlay_vec
= xmalloc (len
* sizeof *overlay_vec
);
3997 /* Put all the overlays we want in a vector in overlay_vec.
3998 Store the length in len.
3999 prevpos gets the position of the previous change. */
4000 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4003 xfree (overlay_vec
);
4004 return make_number (prevpos
);
4007 /* These functions are for debugging overlays. */
4009 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4010 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4011 The car has all the overlays before the overlay center;
4012 the cdr has all the overlays after the overlay center.
4013 Recentering overlays moves overlays between these lists.
4014 The lists you get are copies, so that changing them has no effect.
4015 However, the overlays you get are the real objects that the buffer uses. */)
4018 struct Lisp_Overlay
*ol
;
4019 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4020 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4023 before
= Fcons (tmp
, before
);
4025 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4028 after
= Fcons (tmp
, after
);
4030 return Fcons (Fnreverse (before
), Fnreverse (after
));
4033 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4034 doc
: /* Recenter the overlays of the current buffer around position POS.
4035 That makes overlay lookup faster for positions near POS (but perhaps slower
4036 for positions far away from POS). */)
4040 CHECK_NUMBER_COERCE_MARKER (pos
);
4042 p
= clip_to_bounds (PTRDIFF_MIN
, XINT (pos
), PTRDIFF_MAX
);
4043 recenter_overlay_lists (current_buffer
, p
);
4047 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4048 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4049 (Lisp_Object overlay
, Lisp_Object prop
)
4051 CHECK_OVERLAY (overlay
);
4052 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4055 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4056 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE.
4057 VALUE will be returned.*/)
4058 (Lisp_Object overlay
, Lisp_Object prop
, Lisp_Object value
)
4060 Lisp_Object tail
, buffer
;
4063 CHECK_OVERLAY (overlay
);
4065 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4067 for (tail
= XOVERLAY (overlay
)->plist
;
4068 CONSP (tail
) && CONSP (XCDR (tail
));
4069 tail
= XCDR (XCDR (tail
)))
4070 if (EQ (XCAR (tail
), prop
))
4072 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4073 XSETCAR (XCDR (tail
), value
);
4076 /* It wasn't in the list, so add it to the front. */
4077 changed
= !NILP (value
);
4078 XOVERLAY (overlay
)->plist
4079 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4081 if (! NILP (buffer
))
4084 modify_overlay (XBUFFER (buffer
),
4085 marker_position (OVERLAY_START (overlay
)),
4086 marker_position (OVERLAY_END (overlay
)));
4087 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4088 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4089 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4090 Fdelete_overlay (overlay
);
4096 /* Subroutine of report_overlay_modification. */
4098 /* Lisp vector holding overlay hook functions to call.
4099 Vector elements come in pairs.
4100 Each even-index element is a list of hook functions.
4101 The following odd-index element is the overlay they came from.
4103 Before the buffer change, we fill in this vector
4104 as we call overlay hook functions.
4105 After the buffer change, we get the functions to call from this vector.
4106 This way we always call the same functions before and after the change. */
4107 static Lisp_Object last_overlay_modification_hooks
;
4109 /* Number of elements actually used in last_overlay_modification_hooks. */
4110 static ptrdiff_t last_overlay_modification_hooks_used
;
4112 /* Add one functionlist/overlay pair
4113 to the end of last_overlay_modification_hooks. */
4116 add_overlay_mod_hooklist (Lisp_Object functionlist
, Lisp_Object overlay
)
4118 ptrdiff_t oldsize
= ASIZE (last_overlay_modification_hooks
);
4120 if (oldsize
- 1 <= last_overlay_modification_hooks_used
)
4121 last_overlay_modification_hooks
=
4122 larger_vector (last_overlay_modification_hooks
, 2, -1);
4123 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4124 functionlist
); last_overlay_modification_hooks_used
++;
4125 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4126 overlay
); last_overlay_modification_hooks_used
++;
4129 /* Run the modification-hooks of overlays that include
4130 any part of the text in START to END.
4131 If this change is an insertion, also
4132 run the insert-before-hooks of overlay starting at END,
4133 and the insert-after-hooks of overlay ending at START.
4135 This is called both before and after the modification.
4136 AFTER is nonzero when we call after the modification.
4138 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4139 When AFTER is nonzero, they are the start position,
4140 the position after the inserted new text,
4141 and the length of deleted or replaced old text. */
4144 report_overlay_modification (Lisp_Object start
, Lisp_Object end
, int after
,
4145 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4147 Lisp_Object prop
, overlay
;
4148 struct Lisp_Overlay
*tail
;
4149 /* 1 if this change is an insertion. */
4150 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4151 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4156 /* We used to run the functions as soon as we found them and only register
4157 them in last_overlay_modification_hooks for the purpose of the `after'
4158 case. But running elisp code as we traverse the list of overlays is
4159 painful because the list can be modified by the elisp code so we had to
4160 copy at several places. We now simply do a read-only traversal that
4161 only collects the functions to run and we run them afterwards. It's
4162 simpler, especially since all the code was already there. -stef */
4166 /* We are being called before a change.
4167 Scan the overlays to find the functions to call. */
4168 last_overlay_modification_hooks_used
= 0;
4169 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4171 ptrdiff_t startpos
, endpos
;
4172 Lisp_Object ostart
, oend
;
4174 XSETMISC (overlay
, tail
);
4176 ostart
= OVERLAY_START (overlay
);
4177 oend
= OVERLAY_END (overlay
);
4178 endpos
= OVERLAY_POSITION (oend
);
4179 if (XFASTINT (start
) > endpos
)
4181 startpos
= OVERLAY_POSITION (ostart
);
4182 if (insertion
&& (XFASTINT (start
) == startpos
4183 || XFASTINT (end
) == startpos
))
4185 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4187 add_overlay_mod_hooklist (prop
, overlay
);
4189 if (insertion
&& (XFASTINT (start
) == endpos
4190 || XFASTINT (end
) == endpos
))
4192 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4194 add_overlay_mod_hooklist (prop
, overlay
);
4196 /* Test for intersecting intervals. This does the right thing
4197 for both insertion and deletion. */
4198 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4200 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4202 add_overlay_mod_hooklist (prop
, overlay
);
4206 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4208 ptrdiff_t startpos
, endpos
;
4209 Lisp_Object ostart
, oend
;
4211 XSETMISC (overlay
, tail
);
4213 ostart
= OVERLAY_START (overlay
);
4214 oend
= OVERLAY_END (overlay
);
4215 startpos
= OVERLAY_POSITION (ostart
);
4216 endpos
= OVERLAY_POSITION (oend
);
4217 if (XFASTINT (end
) < startpos
)
4219 if (insertion
&& (XFASTINT (start
) == startpos
4220 || XFASTINT (end
) == startpos
))
4222 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4224 add_overlay_mod_hooklist (prop
, overlay
);
4226 if (insertion
&& (XFASTINT (start
) == endpos
4227 || XFASTINT (end
) == endpos
))
4229 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4231 add_overlay_mod_hooklist (prop
, overlay
);
4233 /* Test for intersecting intervals. This does the right thing
4234 for both insertion and deletion. */
4235 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4237 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4239 add_overlay_mod_hooklist (prop
, overlay
);
4244 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4246 /* Call the functions recorded in last_overlay_modification_hooks.
4247 First copy the vector contents, in case some of these hooks
4248 do subsequent modification of the buffer. */
4249 ptrdiff_t size
= last_overlay_modification_hooks_used
;
4250 Lisp_Object
*copy
= alloca (size
* sizeof *copy
);
4253 memcpy (copy
, XVECTOR (last_overlay_modification_hooks
)->contents
,
4254 size
* sizeof (Lisp_Object
));
4256 gcpro1
.nvars
= size
;
4258 for (i
= 0; i
< size
;)
4260 Lisp_Object prop_i
, overlay_i
;
4262 overlay_i
= copy
[i
++];
4263 call_overlay_mod_hooks (prop_i
, overlay_i
, after
, arg1
, arg2
, arg3
);
4270 call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
, int after
,
4271 Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
4273 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4275 GCPRO4 (list
, arg1
, arg2
, arg3
);
4277 while (CONSP (list
))
4280 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4282 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4288 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4291 evaporate_overlays (ptrdiff_t pos
)
4293 Lisp_Object overlay
, hit_list
;
4294 struct Lisp_Overlay
*tail
;
4297 if (pos
<= current_buffer
->overlay_center
)
4298 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4301 XSETMISC (overlay
, tail
);
4302 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4305 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4306 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4307 hit_list
= Fcons (overlay
, hit_list
);
4310 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4313 XSETMISC (overlay
, tail
);
4314 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4317 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4318 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4319 hit_list
= Fcons (overlay
, hit_list
);
4321 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4322 Fdelete_overlay (XCAR (hit_list
));
4325 /* Somebody has tried to store a value with an unacceptable type
4326 in the slot with offset OFFSET. */
4329 buffer_slot_type_mismatch (Lisp_Object newval
, int type
)
4331 Lisp_Object predicate
;
4335 case_Lisp_Int
: predicate
= Qintegerp
; break;
4336 case Lisp_String
: predicate
= Qstringp
; break;
4337 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4341 wrong_type_argument (predicate
, newval
);
4345 /***********************************************************************
4346 Allocation with mmap
4347 ***********************************************************************/
4349 #ifdef USE_MMAP_FOR_BUFFERS
4351 #include <sys/types.h>
4352 #include <sys/mman.h>
4355 #ifdef MAP_ANONYMOUS
4356 #define MAP_ANON MAP_ANONYMOUS
4363 #define MAP_FAILED ((void *) -1)
4375 /* Memory is allocated in regions which are mapped using mmap(2).
4376 The current implementation lets the system select mapped
4377 addresses; we're not using MAP_FIXED in general, except when
4378 trying to enlarge regions.
4380 Each mapped region starts with a mmap_region structure, the user
4381 area starts after that structure, aligned to MEM_ALIGN.
4383 +-----------------------+
4384 | struct mmap_info + |
4386 +-----------------------+
4390 +-----------------------+ */
4394 /* User-specified size. */
4395 size_t nbytes_specified
;
4397 /* Number of bytes mapped */
4398 size_t nbytes_mapped
;
4400 /* Pointer to the location holding the address of the memory
4401 allocated with the mmap'd block. The variable actually points
4402 after this structure. */
4405 /* Next and previous in list of all mmap'd regions. */
4406 struct mmap_region
*next
, *prev
;
4409 /* Doubly-linked list of mmap'd regions. */
4411 static struct mmap_region
*mmap_regions
;
4413 /* File descriptor for mmap. If we don't have anonymous mapping,
4414 /dev/zero will be opened on it. */
4418 /* Temporary storage for mmap_set_vars, see there. */
4420 static struct mmap_region
*mmap_regions_1
;
4421 static int mmap_fd_1
;
4423 /* Page size on this system. */
4425 static int mmap_page_size
;
4427 /* 1 means mmap has been initialized. */
4429 static int mmap_initialized_p
;
4431 /* Value is X rounded up to the next multiple of N. */
4433 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4435 /* Size of mmap_region structure plus padding. */
4437 #define MMAP_REGION_STRUCT_SIZE \
4438 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4440 /* Given a pointer P to the start of the user-visible part of a mapped
4441 region, return a pointer to the start of the region. */
4443 #define MMAP_REGION(P) \
4444 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4446 /* Given a pointer P to the start of a mapped region, return a pointer
4447 to the start of the user-visible part of the region. */
4449 #define MMAP_USER_AREA(P) \
4450 ((void *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4452 #define MEM_ALIGN sizeof (double)
4454 /* Predicate returning true if part of the address range [START .. END]
4455 is currently mapped. Used to prevent overwriting an existing
4458 Default is to conservatively assume the address range is occupied by
4459 something else. This can be overridden by system configuration
4460 files if system-specific means to determine this exists. */
4462 #ifndef MMAP_ALLOCATED_P
4463 #define MMAP_ALLOCATED_P(start, end) 1
4466 /* Perform necessary initializations for the use of mmap. */
4472 /* The value of mmap_fd is initially 0 in temacs, and -1
4473 in a dumped Emacs. */
4476 /* No anonymous mmap -- we need the file descriptor. */
4477 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4479 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4481 #endif /* MAP_ANON == 0 */
4483 if (mmap_initialized_p
)
4485 mmap_initialized_p
= 1;
4491 mmap_page_size
= getpagesize ();
4494 /* Return a region overlapping address range START...END, or null if
4495 none. END is not including, i.e. the last byte in the range
4498 static struct mmap_region
*
4499 mmap_find (void *start
, void *end
)
4501 struct mmap_region
*r
;
4502 char *s
= (char *) start
, *e
= (char *) end
;
4504 for (r
= mmap_regions
; r
; r
= r
->next
)
4506 char *rstart
= (char *) r
;
4507 char *rend
= rstart
+ r
->nbytes_mapped
;
4509 if (/* First byte of range, i.e. START, in this region? */
4510 (s
>= rstart
&& s
< rend
)
4511 /* Last byte of range, i.e. END - 1, in this region? */
4512 || (e
> rstart
&& e
<= rend
)
4513 /* First byte of this region in the range? */
4514 || (rstart
>= s
&& rstart
< e
)
4515 /* Last byte of this region in the range? */
4516 || (rend
> s
&& rend
<= e
))
4524 /* Unmap a region. P is a pointer to the start of the user-araa of
4525 the region. Value is non-zero if successful. */
4528 mmap_free_1 (struct mmap_region
*r
)
4531 r
->next
->prev
= r
->prev
;
4533 r
->prev
->next
= r
->next
;
4535 mmap_regions
= r
->next
;
4537 if (munmap (r
, r
->nbytes_mapped
) == -1)
4539 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4547 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4548 Value is non-zero if successful. */
4551 mmap_enlarge (struct mmap_region
*r
, int npages
)
4553 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4559 /* Unmap pages at the end of the region. */
4560 nbytes
= - npages
* mmap_page_size
;
4561 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4562 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4565 r
->nbytes_mapped
-= nbytes
;
4569 else if (npages
> 0)
4571 nbytes
= npages
* mmap_page_size
;
4573 /* Try to map additional pages at the end of the region. We
4574 cannot do this if the address range is already occupied by
4575 something else because mmap deletes any previous mapping.
4576 I'm not sure this is worth doing, let's see. */
4577 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4581 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4582 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4583 if (p
== MAP_FAILED
)
4584 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4585 else if (p
!= region_end
)
4587 /* Kernels are free to choose a different address. In
4588 that case, unmap what we've mapped above; we have
4590 if (munmap (p
, nbytes
) == -1)
4591 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4595 r
->nbytes_mapped
+= nbytes
;
4605 /* Set or reset variables holding references to mapped regions. If
4606 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4607 non-zero, set all variables to the start of the user-areas
4610 This function is called from Fdump_emacs to ensure that the dumped
4611 Emacs doesn't contain references to memory that won't be mapped
4612 when Emacs starts. */
4615 mmap_set_vars (int restore_p
)
4617 struct mmap_region
*r
;
4621 mmap_regions
= mmap_regions_1
;
4622 mmap_fd
= mmap_fd_1
;
4623 for (r
= mmap_regions
; r
; r
= r
->next
)
4624 *r
->var
= MMAP_USER_AREA (r
);
4628 for (r
= mmap_regions
; r
; r
= r
->next
)
4630 mmap_regions_1
= mmap_regions
;
4631 mmap_regions
= NULL
;
4632 mmap_fd_1
= mmap_fd
;
4638 /* Allocate a block of storage large enough to hold NBYTES bytes of
4639 data. A pointer to the data is returned in *VAR. VAR is thus the
4640 address of some variable which will use the data area.
4642 The allocation of 0 bytes is valid.
4644 If we can't allocate the necessary memory, set *VAR to null, and
4648 mmap_alloc (void **var
, size_t nbytes
)
4655 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4656 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4659 if (p
== MAP_FAILED
)
4661 if (errno
!= ENOMEM
)
4662 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4667 struct mmap_region
*r
= (struct mmap_region
*) p
;
4669 r
->nbytes_specified
= nbytes
;
4670 r
->nbytes_mapped
= map
;
4673 r
->next
= mmap_regions
;
4678 p
= MMAP_USER_AREA (p
);
4685 /* Free a block of relocatable storage whose data is pointed to by
4686 PTR. Store 0 in *PTR to show there's no block allocated. */
4689 mmap_free (void **var
)
4695 mmap_free_1 (MMAP_REGION (*var
));
4701 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4702 resize it to size NBYTES. Change *VAR to reflect the new block,
4703 and return this value. If more memory cannot be allocated, then
4704 leave *VAR unchanged, and return null. */
4707 mmap_realloc (void **var
, size_t nbytes
)
4714 result
= mmap_alloc (var
, nbytes
);
4715 else if (nbytes
== 0)
4718 result
= mmap_alloc (var
, nbytes
);
4722 struct mmap_region
*r
= MMAP_REGION (*var
);
4723 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4728 void *old_ptr
= *var
;
4730 /* Try to map additional pages at the end of the region.
4731 If that fails, allocate a new region, copy data
4732 from the old region, then free it. */
4733 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4736 r
->nbytes_specified
= nbytes
;
4737 *var
= result
= old_ptr
;
4739 else if (mmap_alloc (var
, nbytes
))
4741 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4742 mmap_free_1 (MMAP_REGION (old_ptr
));
4744 r
= MMAP_REGION (result
);
4745 r
->nbytes_specified
= nbytes
;
4753 else if (room
- nbytes
>= mmap_page_size
)
4755 /* Shrinking by at least a page. Let's give some
4756 memory back to the system.
4758 The extra parens are to make the division happens first,
4759 on positive values, so we know it will round towards
4761 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4763 r
->nbytes_specified
= nbytes
;
4767 /* Leave it alone. */
4769 r
->nbytes_specified
= nbytes
;
4777 #endif /* USE_MMAP_FOR_BUFFERS */
4781 /***********************************************************************
4782 Buffer-text Allocation
4783 ***********************************************************************/
4785 /* Allocate NBYTES bytes for buffer B's text buffer. */
4788 alloc_buffer_text (struct buffer
*b
, ptrdiff_t nbytes
)
4793 #if defined USE_MMAP_FOR_BUFFERS
4794 p
= mmap_alloc ((void **) &b
->text
->beg
, nbytes
);
4795 #elif defined REL_ALLOC
4796 p
= r_alloc ((void **) &b
->text
->beg
, nbytes
);
4798 p
= xmalloc (nbytes
);
4804 memory_full (nbytes
);
4807 b
->text
->beg
= (unsigned char *) p
;
4811 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4815 enlarge_buffer_text (struct buffer
*b
, ptrdiff_t delta
)
4818 ptrdiff_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4821 #if defined USE_MMAP_FOR_BUFFERS
4822 p
= mmap_realloc ((void **) &b
->text
->beg
, nbytes
);
4823 #elif defined REL_ALLOC
4824 p
= r_re_alloc ((void **) &b
->text
->beg
, nbytes
);
4826 p
= xrealloc (b
->text
->beg
, nbytes
);
4832 memory_full (nbytes
);
4835 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4840 /* Free buffer B's text buffer. */
4843 free_buffer_text (struct buffer
*b
)
4847 #if defined USE_MMAP_FOR_BUFFERS
4848 mmap_free ((void **) &b
->text
->beg
);
4849 #elif defined REL_ALLOC
4850 r_alloc_free ((void **) &b
->text
->beg
);
4852 xfree (b
->text
->beg
);
4855 BUF_BEG_ADDR (b
) = NULL
;
4861 /***********************************************************************
4863 ***********************************************************************/
4866 init_buffer_once (void)
4869 /* If you add, remove, or reorder Lisp_Objects in a struct buffer, make
4870 sure that this is still correct. Otherwise, mark_vectorlike may not
4871 trace all Lisp_Objects in buffer_defaults and buffer_local_symbols. */
4873 = (offsetof (struct buffer
, own_text
) - sizeof (struct vectorlike_header
))
4874 / sizeof (Lisp_Object
);
4876 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4878 /* Make sure all markable slots in buffer_defaults
4879 are initialized reasonably, so mark_buffer won't choke. */
4880 reset_buffer (&buffer_defaults
);
4881 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4882 reset_buffer_local_variables (&buffer_defaults
, 1);
4883 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4884 reset_buffer (&buffer_local_symbols
);
4885 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4886 /* Prevent GC from getting confused. */
4887 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4888 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4889 BUF_INTERVALS (&buffer_defaults
) = 0;
4890 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4891 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, pvecsize
);
4892 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4893 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, pvecsize
);
4894 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4896 /* Set up the default values of various buffer slots. */
4897 /* Must do these before making the first buffer! */
4899 /* real setup is done in bindings.el */
4900 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4901 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4902 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4903 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4904 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4905 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4906 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4907 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4908 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4909 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4910 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4911 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4912 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4913 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4914 buffer_defaults
.overlays_before
= NULL
;
4915 buffer_defaults
.overlays_after
= NULL
;
4916 buffer_defaults
.overlay_center
= BEG
;
4918 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4919 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4920 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4921 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4922 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qt
;
4923 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4924 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4925 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4926 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4928 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4929 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4930 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4931 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4932 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4933 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4934 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4935 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4936 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4937 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4938 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4939 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4940 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4941 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4942 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4943 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4944 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4945 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4946 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4947 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4948 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4950 /* Assign the local-flags to the slots that have default values.
4951 The local flag is a bit that is used in the buffer
4952 to say that it has its own local value for the slot.
4953 The local flag bits are in the local_var_flags slot of the buffer. */
4955 /* Nothing can work if this isn't true */
4956 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4958 /* 0 means not a lisp var, -1 means always local, else mask */
4959 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4960 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4961 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4962 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4963 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4964 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4965 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4966 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4967 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4968 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4969 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4970 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4971 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4972 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4973 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4974 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4975 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
4976 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
4977 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
4980 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
4981 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
4982 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
4983 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
4984 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
4985 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
4986 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
4987 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
4988 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
4989 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
4990 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
4991 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
4992 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
4993 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
4994 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
4995 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
4996 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
4997 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
4998 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
4999 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
5000 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
5001 /* Make this one a permanent local. */
5002 buffer_permanent_local_flags
[idx
++] = 1;
5003 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
5004 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
5005 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
5006 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5007 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5008 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5010 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5012 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5013 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5014 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5015 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5016 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5017 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5018 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5019 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5021 /* Need more room? */
5022 if (idx
>= MAX_PER_BUFFER_VARS
)
5024 last_per_buffer_idx
= idx
;
5026 Vbuffer_alist
= Qnil
;
5030 QSFundamental
= make_pure_c_string ("Fundamental");
5032 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5033 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5035 Qmode_class
= intern_c_string ("mode-class");
5037 Qprotected_field
= intern_c_string ("protected-field");
5039 Qpermanent_local
= intern_c_string ("permanent-local");
5041 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5042 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5044 /* super-magic invisible buffer */
5045 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5046 Vbuffer_alist
= Qnil
;
5048 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5050 inhibit_modification_hooks
= 0;
5060 #ifdef USE_MMAP_FOR_BUFFERS
5062 /* When using the ralloc implementation based on mmap(2), buffer
5063 text pointers will have been set to null in the dumped Emacs.
5067 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5068 if (b
->text
->beg
== NULL
)
5069 enlarge_buffer_text (b
, 0);
5071 #endif /* USE_MMAP_FOR_BUFFERS */
5073 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5074 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5075 Fset_buffer_multibyte (Qnil
);
5077 pwd
= get_current_dir_name ();
5080 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5082 /* Maybe this should really use some standard subroutine
5083 whose definition is filename syntax dependent. */
5085 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5087 /* Grow buffer to add directory separator and '\0'. */
5088 pwd
= realloc (pwd
, len
+ 2);
5090 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5091 pwd
[len
] = DIRECTORY_SEP
;
5092 pwd
[len
+ 1] = '\0';
5095 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5096 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5097 /* At this moment, we still don't know how to decode the
5098 directory name. So, we keep the bytes in multibyte form so
5099 that ENCODE_FILE correctly gets the original bytes. */
5100 BVAR (current_buffer
, directory
)
5101 = string_to_multibyte (BVAR (current_buffer
, directory
));
5103 /* Add /: to the front of the name
5104 if it would otherwise be treated as magic. */
5105 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5107 /* If the default dir is just /, TEMP is non-nil
5108 because of the ange-ftp completion handler.
5109 However, it is not necessary to turn / into /:/.
5110 So avoid doing that. */
5111 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5112 BVAR (current_buffer
, directory
)
5113 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5115 temp
= get_minibuffer (0);
5116 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5121 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5122 Object stored in the current buffer. address is the address of the slot
5123 in the buffer that is current now. */
5125 /* TYPE is nil for a general Lisp variable.
5126 An integer specifies a type; then only Lisp values
5127 with that type code are allowed (except that nil is allowed too).
5128 LNAME is the Lisp-level variable name.
5129 VNAME is the name of the buffer slot.
5130 DOC is a dummy where you write the doc string as a comment. */
5131 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5133 static struct Lisp_Buffer_Objfwd bo_fwd; \
5134 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5138 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5139 Lisp_Object
*address
, Lisp_Object type
)
5141 struct Lisp_Symbol
*sym
;
5144 sym
= XSYMBOL (intern (namestring
));
5145 offset
= (char *)address
- (char *)current_buffer
;
5147 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5148 bo_fwd
->offset
= offset
;
5149 bo_fwd
->slottype
= type
;
5150 sym
->declared_special
= 1;
5151 sym
->redirect
= SYMBOL_FORWARDED
;
5153 /* I tried to do the job without a cast, but it seems impossible.
5154 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5155 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5157 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5159 if (PER_BUFFER_IDX (offset
) == 0)
5160 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5161 slot of buffer_local_flags */
5166 /* initialize the buffer routines */
5168 syms_of_buffer (void)
5170 staticpro (&last_overlay_modification_hooks
);
5171 last_overlay_modification_hooks
5172 = Fmake_vector (make_number (10), Qnil
);
5174 staticpro (&Vbuffer_defaults
);
5175 staticpro (&Vbuffer_local_symbols
);
5176 staticpro (&Qfundamental_mode
);
5177 staticpro (&Qmode_class
);
5178 staticpro (&QSFundamental
);
5179 staticpro (&Vbuffer_alist
);
5180 staticpro (&Qprotected_field
);
5181 staticpro (&Qpermanent_local
);
5182 staticpro (&Qkill_buffer_hook
);
5184 DEFSYM (Qpermanent_local_hook
, "permanent-local-hook");
5185 DEFSYM (Qoverlayp
, "overlayp");
5186 DEFSYM (Qevaporate
, "evaporate");
5187 DEFSYM (Qmodification_hooks
, "modification-hooks");
5188 DEFSYM (Qinsert_in_front_hooks
, "insert-in-front-hooks");
5189 DEFSYM (Qinsert_behind_hooks
, "insert-behind-hooks");
5190 DEFSYM (Qget_file_buffer
, "get-file-buffer");
5191 DEFSYM (Qpriority
, "priority");
5192 DEFSYM (Qbefore_string
, "before-string");
5193 DEFSYM (Qafter_string
, "after-string");
5194 DEFSYM (Qfirst_change_hook
, "first-change-hook");
5195 DEFSYM (Qbefore_change_functions
, "before-change-functions");
5196 DEFSYM (Qafter_change_functions
, "after-change-functions");
5197 DEFSYM (Qkill_buffer_query_functions
, "kill-buffer-query-functions");
5199 Fput (Qprotected_field
, Qerror_conditions
,
5200 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5201 Fput (Qprotected_field
, Qerror_message
,
5202 make_pure_c_string ("Attempt to modify a protected field"));
5204 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5206 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5207 This is the same as (default-value 'mode-line-format). */);
5209 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5211 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5212 This is the same as (default-value 'header-line-format). */);
5214 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5215 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5216 This is the same as (default-value 'cursor-type). */);
5218 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5220 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5221 This is the same as (default-value 'line-spacing). */);
5223 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5224 cursor_in_non_selected_windows
,
5225 doc
: /* Default value of `cursor-in-non-selected-windows'.
5226 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5228 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5230 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5231 This is the same as (default-value 'abbrev-mode). */);
5233 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5235 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5236 This is the same as (default-value 'ctl-arrow). */);
5238 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5239 enable_multibyte_characters
,
5240 doc
: /* Default value of `enable-multibyte-characters' for buffers not overriding it.
5241 This is the same as (default-value 'enable-multibyte-characters). */);
5243 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5244 buffer_file_coding_system
,
5245 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5246 This is the same as (default-value 'buffer-file-coding-system). */);
5248 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5250 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5251 This is the same as (default-value 'truncate-lines). */);
5253 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5255 doc
: /* Default value of `fill-column' for buffers that do not override it.
5256 This is the same as (default-value 'fill-column). */);
5258 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5260 doc
: /* Default value of `left-margin' for buffers that do not override it.
5261 This is the same as (default-value 'left-margin). */);
5263 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5265 doc
: /* Default value of `tab-width' for buffers that do not override it.
5266 This is the same as (default-value 'tab-width). */);
5268 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5270 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5271 This is the same as (default-value 'case-fold-search). */);
5273 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5275 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5276 This is the same as (default-value 'left-margin-width). */);
5278 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5280 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5281 This is the same as (default-value 'right-margin-width). */);
5283 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5285 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5286 This is the same as (default-value 'left-fringe-width). */);
5288 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5290 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5291 This is the same as (default-value 'right-fringe-width). */);
5293 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5294 fringes_outside_margins
,
5295 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5296 This is the same as (default-value 'fringes-outside-margins). */);
5298 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5300 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5301 This is the same as (default-value 'scroll-bar-width). */);
5303 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5304 vertical_scroll_bar_type
,
5305 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5306 This is the same as (default-value 'vertical-scroll-bar). */);
5308 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5309 indicate_empty_lines
,
5310 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5311 This is the same as (default-value 'indicate-empty-lines). */);
5313 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5314 indicate_buffer_boundaries
,
5315 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5316 This is the same as (default-value 'indicate-buffer-boundaries). */);
5318 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5319 fringe_indicator_alist
,
5320 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5321 This is the same as (default-value 'fringe-indicator-alist'). */);
5323 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5324 fringe_cursor_alist
,
5325 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5326 This is the same as (default-value 'fringe-cursor-alist'). */);
5328 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5329 scroll_up_aggressively
,
5330 doc
: /* Default value of `scroll-up-aggressively'.
5331 This value applies in buffers that don't have their own local values.
5332 This is the same as (default-value 'scroll-up-aggressively). */);
5334 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5335 scroll_down_aggressively
,
5336 doc
: /* Default value of `scroll-down-aggressively'.
5337 This value applies in buffers that don't have their own local values.
5338 This is the same as (default-value 'scroll-down-aggressively). */);
5340 DEFVAR_PER_BUFFER ("header-line-format",
5341 &BVAR (current_buffer
, header_line_format
),
5343 doc
: /* Analogous to `mode-line-format', but controls the header line.
5344 The header line appears, optionally, at the top of a window;
5345 the mode line appears at the bottom. */);
5347 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5349 doc
: /* Template for displaying mode line for current buffer.
5351 The value may be nil, a string, a symbol or a list.
5353 A value of nil means don't display a mode line.
5355 For any symbol other than t or nil, the symbol's value is processed as
5356 a mode line construct. As a special exception, if that value is a
5357 string, the string is processed verbatim, without handling any
5358 %-constructs (see below). Also, unless the symbol has a non-nil
5359 `risky-local-variable' property, all properties in any strings, as
5360 well as all :eval and :propertize forms in the value, are ignored.
5362 A list whose car is a string or list is processed by processing each
5363 of the list elements recursively, as separate mode line constructs,
5364 and concatenating the results.
5366 A list of the form `(:eval FORM)' is processed by evaluating FORM and
5367 using the result as a mode line construct. Be careful--FORM should
5368 not load any files, because that can cause an infinite recursion.
5370 A list of the form `(:propertize ELT PROPS...)' is processed by
5371 processing ELT as the mode line construct, and adding the text
5372 properties PROPS to the result.
5374 A list whose car is a symbol is processed by examining the symbol's
5375 value, and, if that value is non-nil, processing the cadr of the list
5376 recursively; and if that value is nil, processing the caddr of the
5379 A list whose car is an integer is processed by processing the cadr of
5380 the list, and padding (if the number is positive) or truncating (if
5381 negative) to the width specified by that number.
5383 A string is printed verbatim in the mode line except for %-constructs:
5384 %b -- print buffer name. %f -- print visited file name.
5385 %F -- print frame name.
5386 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5387 %& is like %*, but ignore read-only-ness.
5388 % means buffer is read-only and * means it is modified.
5389 For a modified read-only buffer, %* gives % and %+ gives *.
5390 %s -- print process status. %l -- print the current line number.
5391 %c -- print the current column number (this makes editing slower).
5392 To make the column number update correctly in all cases,
5393 `column-number-mode' must be non-nil.
5394 %i -- print the size of the buffer.
5395 %I -- like %i, but use k, M, G, etc., to abbreviate.
5396 %p -- print percent of buffer above top of window, or Top, Bot or All.
5397 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5398 or print Bottom or All.
5399 %n -- print Narrow if appropriate.
5400 %t -- visited file is text or binary (if OS supports this distinction).
5401 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5402 %Z -- like %z, but including the end-of-line format.
5403 %e -- print error message about full memory.
5404 %@ -- print @ or hyphen. @ means that default-directory is on a
5406 %[ -- print one [ for each recursive editing level. %] similar.
5407 %% -- print %. %- -- print infinitely many dashes.
5408 Decimal digits after the % specify field width to which to pad. */);
5410 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5411 doc
: /* Value of `major-mode' for new buffers. */);
5413 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5414 make_number (Lisp_Symbol
),
5415 doc
: /* Symbol for current buffer's major mode.
5416 The default value (normally `fundamental-mode') affects new buffers.
5417 A value of nil means to use the current buffer's major mode, provided
5418 it is not marked as "special".
5420 When a mode is used by default, `find-file' switches to it before it
5421 reads the contents into the buffer and before it finishes setting up
5422 the buffer. Thus, the mode and its hooks should not expect certain
5423 variables such as `buffer-read-only' and `buffer-file-coding-system'
5426 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5428 doc
: /* Pretty name of current buffer's major mode.
5429 Usually a string, but can use any of the constructs for `mode-line-format',
5431 Format with `format-mode-line' to produce a string value. */);
5433 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5434 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5436 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5437 doc
: /* Non-nil if Abbrev mode is enabled.
5438 Use the command `abbrev-mode' to change this variable. */);
5440 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5442 doc
: /* Non-nil if searches and matches should ignore case. */);
5444 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5445 make_number (LISP_INT_TAG
),
5446 doc
: /* Column beyond which automatic line-wrapping should happen.
5447 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5449 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5450 make_number (LISP_INT_TAG
),
5451 doc
: /* Column for the default `indent-line-function' to indent to.
5452 Linefeed indents to this column in Fundamental mode. */);
5454 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5455 make_number (LISP_INT_TAG
),
5456 doc
: /* Distance between tab stops (for display of tab characters), in columns.
5457 This should be an integer greater than zero. */);
5459 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5460 doc
: /* Non-nil means display control chars with uparrow.
5461 A value of nil means use backslash and octal digits.
5462 This variable does not apply to characters whose display is specified
5463 in the current display table (if there is one). */);
5465 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5466 &BVAR (current_buffer
, enable_multibyte_characters
),
5468 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5469 Otherwise they are regarded as unibyte. This affects the display,
5470 file I/O and the behavior of various editing commands.
5472 This variable is buffer-local but you cannot set it directly;
5473 use the function `set-buffer-multibyte' to change a buffer's representation.
5474 See also Info node `(elisp)Text Representations'. */);
5475 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5477 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5478 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5479 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5480 This variable applies to saving the buffer, and also to `write-region'
5481 and other functions that use `write-region'.
5482 It does not apply to sending output to subprocesses, however.
5484 If this is nil, the buffer is saved without any code conversion
5485 unless some coding system is specified in `file-coding-system-alist'
5486 for the buffer file.
5488 If the text to be saved cannot be encoded as specified by this variable,
5489 an alternative encoding is selected by `select-safe-coding-system', which see.
5491 The variable `coding-system-for-write', if non-nil, overrides this variable.
5493 This variable is never applied to a way of decoding a file while reading it. */);
5495 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5496 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5497 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5499 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5500 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5501 doc
: /* If non-nil, forces directionality of text paragraphs in the buffer.
5503 If this is nil (the default), the direction of each paragraph is
5504 determined by the first strong directional character of its text.
5505 The values of `right-to-left' and `left-to-right' override that.
5506 Any other value is treated as nil.
5508 This variable has no effect unless the buffer's value of
5509 \`bidi-display-reordering' is non-nil. */);
5511 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5512 doc
: /* Non-nil means do not display continuation lines.
5513 Instead, give each line of text just one screen line.
5515 Note that this is overridden by the variable
5516 `truncate-partial-width-windows' if that variable is non-nil
5517 and this buffer is not full-frame width.
5519 Minibuffers set this variable to nil. */);
5521 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5522 doc
: /* Non-nil means to use word-wrapping for continuation lines.
5523 When word-wrapping is on, continuation lines are wrapped at the space
5524 or tab character nearest to the right window edge.
5525 If nil, continuation lines are wrapped at the right screen edge.
5527 This variable has no effect if long lines are truncated (see
5528 `truncate-lines' and `truncate-partial-width-windows'). If you use
5529 word-wrapping, you might want to reduce the value of
5530 `truncate-partial-width-windows', since wrapping can make text readable
5531 in narrower windows.
5533 Instead of setting this variable directly, most users should use
5534 Visual Line mode . Visual Line mode, when enabled, sets `word-wrap'
5535 to t, and additionally redefines simple editing commands to act on
5536 visual lines rather than logical lines. See the documentation of
5537 `visual-line-mode'. */);
5539 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5540 make_number (Lisp_String
),
5541 doc
: /* Name of default directory of current buffer. Should end with slash.
5542 To interactively change the default directory, use command `cd'. */);
5544 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5546 doc
: /* Function called (if non-nil) to perform auto-fill.
5547 It is called after self-inserting any character specified in
5548 the `auto-fill-chars' table.
5549 NOTE: This variable is not a hook;
5550 its value may not be a list of functions. */);
5552 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5553 make_number (Lisp_String
),
5554 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5556 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5557 make_number (Lisp_String
),
5558 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5559 The truename of a file is calculated by `file-truename'
5560 and then abbreviated with `abbreviate-file-name'. */);
5562 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5563 &BVAR (current_buffer
, auto_save_file_name
),
5564 make_number (Lisp_String
),
5565 doc
: /* Name of file for auto-saving current buffer.
5566 If it is nil, that means don't auto-save this buffer. */);
5568 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5569 doc
: /* Non-nil if this buffer is read-only. */);
5571 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5572 doc
: /* Non-nil if this buffer's file has been backed up.
5573 Backing up is done before the first time the file is saved. */);
5575 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5576 make_number (LISP_INT_TAG
),
5577 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5579 -1 means auto-saving turned off until next real save.
5581 If you set this to -2, that means don't turn off auto-saving in this buffer
5582 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5583 you probably should set this to -2 in that buffer. */);
5585 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5587 doc
: /* Non-nil enables selective display.
5588 An integer N as value means display only lines
5589 that start with less than N columns of space.
5590 A value of t means that the character ^M makes itself and
5591 all the rest of the line invisible; also, when saving the buffer
5592 in a file, save the ^M as a newline. */);
5594 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5595 &BVAR (current_buffer
, selective_display_ellipses
),
5597 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5599 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5600 doc
: /* Non-nil if self-insertion should replace existing text.
5601 The value should be one of `overwrite-mode-textual',
5602 `overwrite-mode-binary', or nil.
5603 If it is `overwrite-mode-textual', self-insertion still
5604 inserts at the end of a line, and inserts when point is before a tab,
5605 until the tab is filled in.
5606 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5608 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5610 doc
: /* Display table that controls display of the contents of current buffer.
5612 If this variable is nil, the value of `standard-display-table' is used.
5613 Each window can have its own, overriding display table, see
5614 `set-window-display-table' and `window-display-table'.
5616 The display table is a char-table created with `make-display-table'.
5617 A char-table is an array indexed by character codes. Normal array
5618 primitives `aref' and `aset' can be used to access elements of a char-table.
5620 Each of the char-table elements control how to display the corresponding
5621 text character: the element at index C in the table says how to display
5622 the character whose code is C. Each element should be a vector of
5623 characters or nil. The value nil means display the character in the
5624 default fashion; otherwise, the characters from the vector are delivered
5625 to the screen instead of the original character.
5627 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5628 to display a capital Y instead of each X character.
5630 In addition, a char-table has six extra slots to control the display of:
5632 the end of a truncated screen line (extra-slot 0, a single character);
5633 the end of a continued line (extra-slot 1, a single character);
5634 the escape character used to display character codes in octal
5635 (extra-slot 2, a single character);
5636 the character used as an arrow for control characters (extra-slot 3,
5637 a single character);
5638 the decoration indicating the presence of invisible lines (extra-slot 4,
5639 a vector of characters);
5640 the character used to draw the border between side-by-side windows
5641 (extra-slot 5, a single character).
5643 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5645 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5647 doc
: /* Width of left marginal area for display of a buffer.
5648 A value of nil means no marginal area. */);
5650 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5652 doc
: /* Width of right marginal area for display of a buffer.
5653 A value of nil means no marginal area. */);
5655 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5657 doc
: /* Width of this buffer's left fringe (in pixels).
5658 A value of 0 means no left fringe is shown in this buffer's window.
5659 A value of nil means to use the left fringe width from the window's frame. */);
5661 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5663 doc
: /* Width of this buffer's right fringe (in pixels).
5664 A value of 0 means no right fringe is shown in this buffer's window.
5665 A value of nil means to use the right fringe width from the window's frame. */);
5667 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5669 doc
: /* Non-nil means to display fringes outside display margins.
5670 A value of nil means to display fringes between margins and buffer text. */);
5672 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5674 doc
: /* Width of this buffer's scroll bars in pixels.
5675 A value of nil means to use the scroll bar width from the window's frame. */);
5677 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5679 doc
: /* Position of this buffer's vertical scroll bar.
5680 The value takes effect whenever you tell a window to display this buffer;
5681 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5683 A value of `left' or `right' means put the vertical scroll bar at that side
5684 of the window; a value of nil means don't show any vertical scroll bars.
5685 A value of t (the default) means do whatever the window's frame specifies. */);
5687 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5688 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5689 doc
: /* Visually indicate empty lines after the buffer end.
5690 If non-nil, a bitmap is displayed in the left fringe of a window on
5691 window-systems. */);
5693 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5694 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5695 doc
: /* Visually indicate buffer boundaries and scrolling.
5696 If non-nil, the first and last line of the buffer are marked in the fringe
5697 of a window on window-systems with angle bitmaps, or if the window can be
5698 scrolled, the top and bottom line of the window are marked with up and down
5701 If value is a symbol `left' or `right', both angle and arrow bitmaps
5702 are displayed in the left or right fringe, resp. Any other value
5703 that doesn't look like an alist means display the angle bitmaps in
5704 the left fringe but no arrows.
5706 You can exercise more precise control by using an alist as the
5707 value. Each alist element (INDICATOR . POSITION) specifies
5708 where to show one of the indicators. INDICATOR is one of `top',
5709 `bottom', `up', `down', or t, which specifies the default position,
5710 and POSITION is one of `left', `right', or nil, meaning do not show
5713 For example, ((top . left) (t . right)) places the top angle bitmap in
5714 left fringe, the bottom angle bitmap in right fringe, and both arrow
5715 bitmaps in right fringe. To show just the angle bitmaps in the left
5716 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5718 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5719 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5720 doc
: /* Mapping from logical to physical fringe indicator bitmaps.
5721 The value is an alist where each element (INDICATOR . BITMAPS)
5722 specifies the fringe bitmaps used to display a specific logical
5725 INDICATOR specifies the logical indicator type which is one of the
5726 following symbols: `truncation' , `continuation', `overlay-arrow',
5727 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5729 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5730 the actual bitmap shown in the left or right fringe for the logical
5731 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5732 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5733 are used only for the `bottom' and `top-bottom' indicators when the
5734 last (only) line has no final newline. BITMAPS may also be a single
5735 symbol which is used in both left and right fringes. */);
5737 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5738 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5739 doc
: /* Mapping from logical to physical fringe cursor bitmaps.
5740 The value is an alist where each element (CURSOR . BITMAP)
5741 specifies the fringe bitmaps used to display a specific logical
5742 cursor type in the fringe.
5744 CURSOR specifies the logical cursor type which is one of the following
5745 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5746 one is used to show a hollow cursor on narrow lines display lines
5747 where the normal hollow cursor will not fit.
5749 BITMAP is the corresponding fringe bitmap shown for the logical
5752 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5753 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5754 doc
: /* How far to scroll windows upward.
5755 If you move point off the bottom, the window scrolls automatically.
5756 This variable controls how far it scrolls. The value nil, the default,
5757 means scroll to center point. A fraction means scroll to put point
5758 that fraction of the window's height from the bottom of the window.
5759 When the value is 0.0, point goes at the bottom line, which in the
5760 simple case that you moved off with C-f means scrolling just one line.
5761 1.0 means point goes at the top, so that in that simple case, the
5762 window scrolls by a full window height. Meaningful values are
5763 between 0.0 and 1.0, inclusive. */);
5765 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5766 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5767 doc
: /* How far to scroll windows downward.
5768 If you move point off the top, the window scrolls automatically.
5769 This variable controls how far it scrolls. The value nil, the default,
5770 means scroll to center point. A fraction means scroll to put point
5771 that fraction of the window's height from the top of the window.
5772 When the value is 0.0, point goes at the top line, which in the
5773 simple case that you moved off with C-b means scrolling just one line.
5774 1.0 means point goes at the bottom, so that in that simple case, the
5775 window scrolls by a full window height. Meaningful values are
5776 between 0.0 and 1.0, inclusive. */);
5778 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5782 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5783 doc
: /* List of functions to call before each text change.
5784 Two arguments are passed to each function: the positions of
5785 the beginning and end of the range of old text to be changed.
5786 \(For an insertion, the beginning and end are at the same place.)
5787 No information is given about the length of the text after the change.
5789 Buffer changes made while executing the `before-change-functions'
5790 don't call any before-change or after-change functions.
5791 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5793 If an unhandled error happens in running these functions,
5794 the variable's value remains nil. That prevents the error
5795 from happening repeatedly and making Emacs nonfunctional. */);
5796 Vbefore_change_functions
= Qnil
;
5798 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5799 doc
: /* List of functions to call after each text change.
5800 Three arguments are passed to each function: the positions of
5801 the beginning and end of the range of changed text,
5802 and the length in bytes of the pre-change text replaced by that range.
5803 \(For an insertion, the pre-change length is zero;
5804 for a deletion, that length is the number of bytes deleted,
5805 and the post-change beginning and end are at the same place.)
5807 Buffer changes made while executing the `after-change-functions'
5808 don't call any before-change or after-change functions.
5809 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5811 If an unhandled error happens in running these functions,
5812 the variable's value remains nil. That prevents the error
5813 from happening repeatedly and making Emacs nonfunctional. */);
5814 Vafter_change_functions
= Qnil
;
5816 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5817 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5818 The functions are run using the `run-hooks' function. */);
5819 Vfirst_change_hook
= Qnil
;
5821 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5822 doc
: /* List of undo entries in current buffer.
5823 Recent changes come first; older changes follow newer.
5825 An entry (BEG . END) represents an insertion which begins at
5826 position BEG and ends at position END.
5828 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5829 from (abs POSITION). If POSITION is positive, point was at the front
5830 of the text being deleted; if negative, point was at the end.
5832 An entry (t HIGH LOW USEC PSEC) indicates that the buffer was previously
5833 unmodified; (HIGH LOW USEC PSEC) is in the same style as (current-time)
5834 and is the visited file's modification time, as of that time. If the
5835 modification time of the most recent save is different, this entry is
5838 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5839 was modified between BEG and END. PROPERTY is the property name,
5840 and VALUE is the old value.
5842 An entry (apply FUN-NAME . ARGS) means undo the change with
5843 \(apply FUN-NAME ARGS).
5845 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5846 in the active region. BEG and END is the range affected by this entry
5847 and DELTA is the number of bytes added or deleted in that range by
5850 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5851 was adjusted in position by the offset DISTANCE (an integer).
5853 An entry of the form POSITION indicates that point was at the buffer
5854 location given by the integer. Undoing an entry of this form places
5857 Entries with value `nil' mark undo boundaries. The undo command treats
5858 the changes between two undo boundaries as a single step to be undone.
5860 If the value of the variable is t, undo information is not recorded. */);
5862 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5863 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5865 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5866 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5868 Normally, the line-motion functions work by scanning the buffer for
5869 newlines. Columnar operations (like `move-to-column' and
5870 `compute-motion') also work by scanning the buffer, summing character
5871 widths as they go. This works well for ordinary text, but if the
5872 buffer's lines are very long (say, more than 500 characters), these
5873 motion functions will take longer to execute. Emacs may also take
5874 longer to update the display.
5876 If `cache-long-line-scans' is non-nil, these motion functions cache the
5877 results of their scans, and consult the cache to avoid rescanning
5878 regions of the buffer until the text is modified. The caches are most
5879 beneficial when they prevent the most searching---that is, when the
5880 buffer contains long lines and large regions of characters with the
5881 same, fixed screen width.
5883 When `cache-long-line-scans' is non-nil, processing short lines will
5884 become slightly slower (because of the overhead of consulting the
5885 cache), and the caches will use memory roughly proportional to the
5886 number of newlines and characters whose screen width varies.
5888 The caches require no explicit maintenance; their accuracy is
5889 maintained internally by the Emacs primitives. Enabling or disabling
5890 the cache should not affect the behavior of any of the motion
5891 functions; it should only affect their performance. */);
5893 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5894 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5896 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5897 doc
: /* List of formats to use when saving this buffer.
5898 Formats are defined by `format-alist'. This variable is
5899 set when a file is visited. */);
5901 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5902 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5903 doc
: /* Format in which to write auto-save files.
5904 Should be a list of symbols naming formats that are defined in `format-alist'.
5905 If it is t, which is the default, auto-save files are written in the
5906 same format as a regular save would use. */);
5908 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5909 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5910 doc
: /* Invisibility spec of this buffer.
5911 The default is t, which means that text is invisible
5912 if it has a non-nil `invisible' property.
5913 If the value is a list, a text character is invisible if its `invisible'
5914 property is an element in that list (or is a list with members in common).
5915 If an element is a cons cell of the form (PROP . ELLIPSIS),
5916 then characters with property value PROP are invisible,
5917 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5919 DEFVAR_PER_BUFFER ("buffer-display-count",
5920 &BVAR (current_buffer
, display_count
), Qnil
,
5921 doc
: /* A number incremented each time this buffer is displayed in a window.
5922 The function `set-window-buffer' increments it. */);
5924 DEFVAR_PER_BUFFER ("buffer-display-time",
5925 &BVAR (current_buffer
, display_time
), Qnil
,
5926 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5927 The function `set-window-buffer' updates this variable
5928 to the value obtained by calling `current-time'.
5929 If the buffer has never been shown in a window, the value is nil. */);
5931 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5932 doc
: /* Non-nil if Transient Mark mode is enabled.
5933 See the command `transient-mark-mode' for a description of this minor mode.
5935 Non-nil also enables highlighting of the region whenever the mark is active.
5936 The variable `highlight-nonselected-windows' controls whether to highlight
5937 all windows or just the selected window.
5939 Lisp programs may give this variable certain special values:
5941 - A value of `lambda' enables Transient Mark mode temporarily.
5942 It is disabled again after any subsequent action that would
5943 normally deactivate the mark (e.g. buffer modification).
5945 - A value of (only . OLDVAL) enables Transient Mark mode
5946 temporarily. After any subsequent point motion command that is
5947 not shift-translated, or any other action that would normally
5948 deactivate the mark (e.g. buffer modification), the value of
5949 `transient-mark-mode' is set to OLDVAL. */);
5950 Vtransient_mark_mode
= Qnil
;
5952 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5953 doc
: /* Non-nil means disregard read-only status of buffers or characters.
5954 If the value is t, disregard `buffer-read-only' and all `read-only'
5955 text properties. If the value is a list, disregard `buffer-read-only'
5956 and disregard a `read-only' text property if the property value
5957 is a member of the list. */);
5958 Vinhibit_read_only
= Qnil
;
5960 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5961 doc
: /* Cursor to use when this buffer is in the selected window.
5962 Values are interpreted as follows:
5964 t use the cursor specified for the frame
5965 nil don't display a cursor
5966 box display a filled box cursor
5967 hollow display a hollow box cursor
5968 bar display a vertical bar cursor with default width
5969 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5970 hbar display a horizontal bar cursor with default height
5971 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5972 ANYTHING ELSE display a hollow box cursor
5974 When the buffer is displayed in a non-selected window, the
5975 cursor's appearance is instead controlled by the variable
5976 `cursor-in-non-selected-windows'. */);
5978 DEFVAR_PER_BUFFER ("line-spacing",
5979 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
5980 doc
: /* Additional space to put between lines when displaying a buffer.
5981 The space is measured in pixels, and put below lines on graphic displays,
5982 see `display-graphic-p'.
5983 If value is a floating point number, it specifies the spacing relative
5984 to the default frame line height. A value of nil means add no extra space. */);
5986 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
5987 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
5988 doc
: /* Non-nil means show a cursor in non-selected windows.
5989 If nil, only shows a cursor in the selected window.
5990 If t, displays a cursor related to the usual cursor type
5991 \(a solid box becomes hollow, a bar becomes a narrower bar).
5992 You can also specify the cursor type as in the `cursor-type' variable.
5993 Use Custom to set this variable and update the display." */);
5995 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
5996 doc
: /* List of functions called with no args to query before killing a buffer.
5997 The buffer being killed will be current while the functions are running.
5999 If any of them returns nil, the buffer is not killed. Functions run by
6000 this hook are supposed to not change the current buffer. */);
6001 Vkill_buffer_query_functions
= Qnil
;
6003 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
6004 doc
: /* Normal hook run before changing the major mode of a buffer.
6005 The function `kill-all-local-variables' runs this before doing anything else. */);
6006 Vchange_major_mode_hook
= Qnil
;
6007 DEFSYM (Qchange_major_mode_hook
, "change-major-mode-hook");
6009 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
6010 doc
: /* Hook run when the buffer list changes.
6011 Functions running this hook are `get-buffer-create',
6012 `make-indirect-buffer', `rename-buffer', `kill-buffer',
6013 and `bury-buffer-internal'. */);
6014 Vbuffer_list_update_hook
= Qnil
;
6015 DEFSYM (Qbuffer_list_update_hook
, "buffer-list-update-hook");
6017 defsubr (&Sbuffer_live_p
);
6018 defsubr (&Sbuffer_list
);
6019 defsubr (&Sget_buffer
);
6020 defsubr (&Sget_file_buffer
);
6021 defsubr (&Sget_buffer_create
);
6022 defsubr (&Smake_indirect_buffer
);
6023 defsubr (&Sgenerate_new_buffer_name
);
6024 defsubr (&Sbuffer_name
);
6025 /*defsubr (&Sbuffer_number);*/
6026 defsubr (&Sbuffer_file_name
);
6027 defsubr (&Sbuffer_base_buffer
);
6028 defsubr (&Sbuffer_local_value
);
6029 defsubr (&Sbuffer_local_variables
);
6030 defsubr (&Sbuffer_modified_p
);
6031 defsubr (&Sset_buffer_modified_p
);
6032 defsubr (&Sbuffer_modified_tick
);
6033 defsubr (&Sbuffer_chars_modified_tick
);
6034 defsubr (&Srename_buffer
);
6035 defsubr (&Sother_buffer
);
6036 defsubr (&Sbuffer_enable_undo
);
6037 defsubr (&Skill_buffer
);
6038 defsubr (&Sbury_buffer_internal
);
6039 defsubr (&Sset_buffer_major_mode
);
6040 defsubr (&Scurrent_buffer
);
6041 defsubr (&Sset_buffer
);
6042 defsubr (&Sbarf_if_buffer_read_only
);
6043 defsubr (&Serase_buffer
);
6044 defsubr (&Sbuffer_swap_text
);
6045 defsubr (&Sset_buffer_multibyte
);
6046 defsubr (&Skill_all_local_variables
);
6048 defsubr (&Soverlayp
);
6049 defsubr (&Smake_overlay
);
6050 defsubr (&Sdelete_overlay
);
6051 defsubr (&Smove_overlay
);
6052 defsubr (&Soverlay_start
);
6053 defsubr (&Soverlay_end
);
6054 defsubr (&Soverlay_buffer
);
6055 defsubr (&Soverlay_properties
);
6056 defsubr (&Soverlays_at
);
6057 defsubr (&Soverlays_in
);
6058 defsubr (&Snext_overlay_change
);
6059 defsubr (&Sprevious_overlay_change
);
6060 defsubr (&Soverlay_recenter
);
6061 defsubr (&Soverlay_lists
);
6062 defsubr (&Soverlay_get
);
6063 defsubr (&Soverlay_put
);
6064 defsubr (&Srestore_buffer_modified_p
);
6068 keys_of_buffer (void)
6070 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6071 initial_define_key (control_x_map
, 'k', "kill-buffer");
6073 /* This must not be in syms_of_buffer, because Qdisabled is not
6074 initialized when that function gets called. */
6075 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);