1 /* Buffer manipulation primitives for GNU Emacs.
3 Copyright (C) 1985-1989, 1993-1995, 1997-2011 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22 #include <sys/types.h>
24 #include <sys/param.h>
33 #include "intervals.h"
37 #include "character.h"
38 #include "region-cache.h"
40 #include "blockinput.h"
45 struct buffer
*current_buffer
; /* the current buffer */
47 /* First buffer in chain of all buffers (in reverse order of creation).
48 Threaded through ->header.next.buffer. */
50 struct buffer
*all_buffers
;
52 /* This structure holds the default values of the buffer-local variables
53 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
54 The default value occupies the same slot in this structure
55 as an individual buffer's value occupies in that buffer.
56 Setting the default value also goes through the alist of buffers
57 and stores into each buffer that does not say it has a local value. */
59 DECL_ALIGN (struct buffer
, buffer_defaults
);
61 /* A Lisp_Object pointer to the above, used for staticpro */
63 static Lisp_Object Vbuffer_defaults
;
65 /* This structure marks which slots in a buffer have corresponding
66 default values in buffer_defaults.
67 Each such slot has a nonzero value in this structure.
68 The value has only one nonzero bit.
70 When a buffer has its own local value for a slot,
71 the entry for that slot (found in the same slot in this structure)
72 is turned on in the buffer's local_flags array.
74 If a slot in this structure is -1, then even though there may
75 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
76 and the corresponding slot in buffer_defaults is not used.
78 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
79 zero, that is a bug */
81 struct buffer buffer_local_flags
;
83 /* This structure holds the names of symbols whose values may be
84 buffer-local. It is indexed and accessed in the same way as the above. */
86 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
88 /* A Lisp_Object pointer to the above, used for staticpro */
89 static Lisp_Object Vbuffer_local_symbols
;
91 /* Return the symbol of the per-buffer variable at offset OFFSET in
92 the buffer structure. */
94 #define PER_BUFFER_SYMBOL(OFFSET) \
95 (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
97 /* Flags indicating which built-in buffer-local variables
98 are permanent locals. */
99 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
101 /* Number of per-buffer variables used. */
103 int last_per_buffer_idx
;
105 static Lisp_Object
Fset_buffer_major_mode (Lisp_Object
);
106 static Lisp_Object
Fdelete_overlay (Lisp_Object
);
107 static void call_overlay_mod_hooks (Lisp_Object list
, Lisp_Object overlay
,
108 int after
, Lisp_Object arg1
,
109 Lisp_Object arg2
, Lisp_Object arg3
);
110 static void swap_out_buffer_local_variables (struct buffer
*b
);
111 static void reset_buffer_local_variables (struct buffer
*b
, int permanent_too
);
113 /* Alist of all buffer names vs the buffers. */
114 /* This used to be a variable, but is no longer,
115 to prevent lossage due to user rplac'ing this alist or its elements. */
116 Lisp_Object Vbuffer_alist
;
118 static Lisp_Object Qkill_buffer_query_functions
;
120 /* Hook run before changing a major mode. */
121 static Lisp_Object Qchange_major_mode_hook
;
123 Lisp_Object Qfirst_change_hook
;
124 Lisp_Object Qbefore_change_functions
;
125 Lisp_Object Qafter_change_functions
;
126 static Lisp_Object Qucs_set_table_for_input
;
128 static Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
129 static Lisp_Object Qpermanent_local_hook
;
131 static Lisp_Object Qprotected_field
;
133 static Lisp_Object QSFundamental
; /* A string "Fundamental" */
135 static Lisp_Object Qkill_buffer_hook
;
136 static Lisp_Object Qbuffer_list_update_hook
;
138 static Lisp_Object Qget_file_buffer
;
140 static Lisp_Object Qoverlayp
;
142 Lisp_Object Qpriority
, Qbefore_string
, Qafter_string
;
144 static Lisp_Object Qevaporate
;
146 Lisp_Object Qmodification_hooks
;
147 Lisp_Object Qinsert_in_front_hooks
;
148 Lisp_Object Qinsert_behind_hooks
;
150 static void alloc_buffer_text (struct buffer
*, size_t);
151 static void free_buffer_text (struct buffer
*b
);
152 static struct Lisp_Overlay
* copy_overlays (struct buffer
*, struct Lisp_Overlay
*);
153 static void modify_overlay (struct buffer
*, EMACS_INT
, EMACS_INT
);
154 static Lisp_Object
buffer_lisp_local_variables (struct buffer
*);
156 /* For debugging; temporary. See set_buffer_internal. */
157 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
160 nsberror (Lisp_Object spec
)
163 error ("No buffer named %s", SDATA (spec
));
164 error ("Invalid buffer argument");
167 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
168 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
169 Value is nil if OBJECT is not a buffer or if it has been killed. */)
172 return ((BUFFERP (object
) && ! NILP (BVAR (XBUFFER (object
), name
)))
176 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
177 doc
: /* Return a list of all existing live buffers.
178 If the optional arg FRAME is a frame, we return the buffer list in the
179 proper order for that frame: the buffers show in FRAME come first,
180 followed by the rest of the buffers. */)
184 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
188 Lisp_Object framelist
, prevlist
, tail
;
192 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
193 prevlist
= Fnreverse (Fcopy_sequence
194 (XFRAME (frame
)->buried_buffer_list
));
196 /* Remove from GENERAL any buffer that duplicates one in
197 FRAMELIST or PREVLIST. */
201 general
= Fdelq (XCAR (tail
), general
);
207 general
= Fdelq (XCAR (tail
), general
);
214 return Fnconc (3, args
);
220 /* Like Fassoc, but use Fstring_equal to compare
221 (which ignores text properties),
222 and don't ever QUIT. */
225 assoc_ignore_text_properties (register Lisp_Object key
, Lisp_Object list
)
227 register Lisp_Object tail
;
228 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
230 register Lisp_Object elt
, tem
;
232 tem
= Fstring_equal (Fcar (elt
), key
);
239 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
240 doc
: /* Return the buffer named BUFFER-OR-NAME.
241 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
242 is a string and there is no buffer with that name, return nil. If
243 BUFFER-OR-NAME is a buffer, return it as given. */)
244 (register Lisp_Object buffer_or_name
)
246 if (BUFFERP (buffer_or_name
))
247 return buffer_or_name
;
248 CHECK_STRING (buffer_or_name
);
250 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
253 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
254 doc
: /* Return the buffer visiting file FILENAME (a string).
255 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
256 If there is no such live buffer, return nil.
257 See also `find-buffer-visiting'. */)
258 (register Lisp_Object filename
)
260 register Lisp_Object tail
, buf
, tem
;
263 CHECK_STRING (filename
);
264 filename
= Fexpand_file_name (filename
, Qnil
);
266 /* If the file name has special constructs in it,
267 call the corresponding file handler. */
268 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
270 return call2 (handler
, Qget_file_buffer
, filename
);
272 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
274 buf
= Fcdr (XCAR (tail
));
275 if (!BUFFERP (buf
)) continue;
276 if (!STRINGP (BVAR (XBUFFER (buf
), filename
))) continue;
277 tem
= Fstring_equal (BVAR (XBUFFER (buf
), filename
), filename
);
285 get_truename_buffer (register Lisp_Object filename
)
287 register Lisp_Object tail
, buf
, tem
;
289 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
291 buf
= Fcdr (XCAR (tail
));
292 if (!BUFFERP (buf
)) continue;
293 if (!STRINGP (BVAR (XBUFFER (buf
), file_truename
))) continue;
294 tem
= Fstring_equal (BVAR (XBUFFER (buf
), file_truename
), filename
);
301 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
302 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
303 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
304 return that buffer. If no such buffer exists, create a new buffer with
305 that name and return it. If BUFFER-OR-NAME starts with a space, the new
306 buffer does not keep undo information.
308 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
309 even if it is dead. The return value is never nil. */)
310 (register Lisp_Object buffer_or_name
)
312 register Lisp_Object buffer
, name
;
313 register struct buffer
*b
;
315 buffer
= Fget_buffer (buffer_or_name
);
319 if (SCHARS (buffer_or_name
) == 0)
320 error ("Empty string for buffer name is not allowed");
322 b
= allocate_buffer ();
324 /* An ordinary buffer uses its own struct buffer_text. */
325 b
->text
= &b
->own_text
;
328 BUF_GAP_SIZE (b
) = 20;
330 /* We allocate extra 1-byte at the tail and keep it always '\0' for
331 anchoring a search. */
332 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
334 if (! BUF_BEG_ADDR (b
))
335 buffer_memory_full (BUF_GAP_SIZE (b
) + 1);
340 b
->pt_byte
= BEG_BYTE
;
341 b
->begv_byte
= BEG_BYTE
;
342 b
->zv_byte
= BEG_BYTE
;
345 BUF_GPT_BYTE (b
) = BEG_BYTE
;
348 BUF_Z_BYTE (b
) = BEG_BYTE
;
350 BUF_CHARS_MODIFF (b
) = 1;
351 BUF_OVERLAY_MODIFF (b
) = 1;
352 BUF_SAVE_MODIFF (b
) = 1;
353 BUF_INTERVALS (b
) = 0;
354 BUF_UNCHANGED_MODIFIED (b
) = 1;
355 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
356 BUF_END_UNCHANGED (b
) = 0;
357 BUF_BEG_UNCHANGED (b
) = 0;
358 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
360 b
->newline_cache
= 0;
361 b
->width_run_cache
= 0;
362 BVAR (b
, width_table
) = Qnil
;
363 b
->prevent_redisplay_optimizations_p
= 1;
365 /* Put this on the chain of all buffers including killed ones. */
366 b
->header
.next
.buffer
= all_buffers
;
369 /* An ordinary buffer normally doesn't need markers
370 to handle BEGV and ZV. */
371 BVAR (b
, pt_marker
) = Qnil
;
372 BVAR (b
, begv_marker
) = Qnil
;
373 BVAR (b
, zv_marker
) = Qnil
;
375 name
= Fcopy_sequence (buffer_or_name
);
376 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
377 BVAR (b
, name
) = name
;
379 BVAR (b
, undo_list
) = (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
382 reset_buffer_local_variables (b
, 1);
384 BVAR (b
, mark
) = Fmake_marker ();
385 BUF_MARKERS (b
) = NULL
;
386 BVAR (b
, name
) = name
;
388 /* Put this in the alist of all live buffers. */
389 XSETBUFFER (buffer
, b
);
390 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
391 /* And run buffer-list-update-hook. */
392 if (!NILP (Vrun_hooks
))
393 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
395 /* An error in calling the function here (should someone redefine it)
396 can lead to infinite regress until you run out of stack. rms
397 says that's not worth protecting against. */
398 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
399 /* buffer is on buffer-alist, so no gcpro. */
400 call1 (Qucs_set_table_for_input
, buffer
);
406 /* Return a list of overlays which is a copy of the overlay list
407 LIST, but for buffer B. */
409 static struct Lisp_Overlay
*
410 copy_overlays (struct buffer
*b
, struct Lisp_Overlay
*list
)
413 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
415 XSETBUFFER (buffer
, b
);
417 for (; list
; list
= list
->next
)
419 Lisp_Object overlay
, start
, end
, old_overlay
;
422 XSETMISC (old_overlay
, list
);
423 charpos
= marker_position (OVERLAY_START (old_overlay
));
424 start
= Fmake_marker ();
425 Fset_marker (start
, make_number (charpos
), buffer
);
426 XMARKER (start
)->insertion_type
427 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
429 charpos
= marker_position (OVERLAY_END (old_overlay
));
430 end
= Fmake_marker ();
431 Fset_marker (end
, make_number (charpos
), buffer
);
432 XMARKER (end
)->insertion_type
433 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
435 overlay
= allocate_misc ();
436 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
437 OVERLAY_START (overlay
) = start
;
438 OVERLAY_END (overlay
) = end
;
439 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
440 XOVERLAY (overlay
)->next
= NULL
;
443 tail
= tail
->next
= XOVERLAY (overlay
);
445 result
= tail
= XOVERLAY (overlay
);
452 /* Clone per-buffer values of buffer FROM.
454 Buffer TO gets the same per-buffer values as FROM, with the
455 following exceptions: (1) TO's name is left untouched, (2) markers
456 are copied and made to refer to TO, and (3) overlay lists are
460 clone_per_buffer_values (struct buffer
*from
, struct buffer
*to
)
462 Lisp_Object to_buffer
;
465 XSETBUFFER (to_buffer
, to
);
467 /* buffer-local Lisp variables start at `undo_list',
468 tho only the ones from `name' on are GC'd normally. */
469 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
471 offset
+= sizeof (Lisp_Object
))
475 /* Don't touch the `name' which should be unique for every buffer. */
476 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
479 obj
= PER_BUFFER_VALUE (from
, offset
);
480 if (MARKERP (obj
) && XMARKER (obj
)->buffer
== from
)
482 struct Lisp_Marker
*m
= XMARKER (obj
);
483 obj
= Fmake_marker ();
484 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
485 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
488 PER_BUFFER_VALUE (to
, offset
) = obj
;
491 memcpy (to
->local_flags
, from
->local_flags
, sizeof to
->local_flags
);
493 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
494 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
496 /* Get (a copy of) the alist of Lisp-level local variables of FROM
497 and install that in TO. */
498 BVAR (to
, local_var_alist
) = buffer_lisp_local_variables (from
);
502 /* If buffer B has markers to record PT, BEGV and ZV when it is not
503 current, update these markers. */
506 record_buffer_markers (struct buffer
*b
)
508 if (! NILP (BVAR (b
, pt_marker
)))
512 eassert (!NILP (BVAR (b
, begv_marker
)));
513 eassert (!NILP (BVAR (b
, zv_marker
)));
515 XSETBUFFER (buffer
, b
);
516 set_marker_both (BVAR (b
, pt_marker
), buffer
, b
->pt
, b
->pt_byte
);
517 set_marker_both (BVAR (b
, begv_marker
), buffer
, b
->begv
, b
->begv_byte
);
518 set_marker_both (BVAR (b
, zv_marker
), buffer
, b
->zv
, b
->zv_byte
);
523 /* If buffer B has markers to record PT, BEGV and ZV when it is not
524 current, fetch these values into B->begv etc. */
527 fetch_buffer_markers (struct buffer
*b
)
529 if (! NILP (BVAR (b
, pt_marker
)))
533 eassert (!NILP (BVAR (b
, begv_marker
)));
534 eassert (!NILP (BVAR (b
, zv_marker
)));
536 m
= BVAR (b
, pt_marker
);
537 SET_BUF_PT_BOTH (b
, marker_position (m
), marker_byte_position (m
));
539 m
= BVAR (b
, begv_marker
);
540 SET_BUF_BEGV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
542 m
= BVAR (b
, zv_marker
);
543 SET_BUF_ZV_BOTH (b
, marker_position (m
), marker_byte_position (m
));
548 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
550 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
551 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
552 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
553 NAME should be a string which is not the name of an existing buffer.
554 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
555 such as major and minor modes, in the indirect buffer.
556 CLONE nil means the indirect buffer's state is reset to default values. */)
557 (Lisp_Object base_buffer
, Lisp_Object name
, Lisp_Object clone
)
559 Lisp_Object buf
, tem
;
563 buf
= Fget_buffer (name
);
565 error ("Buffer name `%s' is in use", SDATA (name
));
568 base_buffer
= Fget_buffer (base_buffer
);
569 if (NILP (base_buffer
))
570 error ("No such buffer: `%s'", SDATA (tem
));
571 if (NILP (BVAR (XBUFFER (base_buffer
), name
)))
572 error ("Base buffer has been killed");
574 if (SCHARS (name
) == 0)
575 error ("Empty string for buffer name is not allowed");
577 b
= allocate_buffer ();
579 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
580 ? XBUFFER (base_buffer
)->base_buffer
581 : XBUFFER (base_buffer
));
583 /* Use the base buffer's text object. */
584 b
->text
= b
->base_buffer
->text
;
586 b
->pt
= b
->base_buffer
->pt
;
587 b
->begv
= b
->base_buffer
->begv
;
588 b
->zv
= b
->base_buffer
->zv
;
589 b
->pt_byte
= b
->base_buffer
->pt_byte
;
590 b
->begv_byte
= b
->base_buffer
->begv_byte
;
591 b
->zv_byte
= b
->base_buffer
->zv_byte
;
593 b
->newline_cache
= 0;
594 b
->width_run_cache
= 0;
595 BVAR (b
, width_table
) = Qnil
;
597 /* Put this on the chain of all buffers including killed ones. */
598 b
->header
.next
.buffer
= all_buffers
;
601 name
= Fcopy_sequence (name
);
602 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
603 BVAR (b
, name
) = name
;
606 reset_buffer_local_variables (b
, 1);
608 /* Put this in the alist of all live buffers. */
610 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
612 BVAR (b
, mark
) = Fmake_marker ();
613 BVAR (b
, name
) = name
;
615 /* The multibyte status belongs to the base buffer. */
616 BVAR (b
, enable_multibyte_characters
) = BVAR (b
->base_buffer
, enable_multibyte_characters
);
618 /* Make sure the base buffer has markers for its narrowing. */
619 if (NILP (BVAR (b
->base_buffer
, pt_marker
)))
621 eassert (NILP (BVAR (b
->base_buffer
, begv_marker
)));
622 eassert (NILP (BVAR (b
->base_buffer
, zv_marker
)));
624 BVAR (b
->base_buffer
, pt_marker
) = Fmake_marker ();
625 set_marker_both (BVAR (b
->base_buffer
, pt_marker
), base_buffer
,
627 b
->base_buffer
->pt_byte
);
629 BVAR (b
->base_buffer
, begv_marker
) = Fmake_marker ();
630 set_marker_both (BVAR (b
->base_buffer
, begv_marker
), base_buffer
,
631 b
->base_buffer
->begv
,
632 b
->base_buffer
->begv_byte
);
634 BVAR (b
->base_buffer
, zv_marker
) = Fmake_marker ();
635 set_marker_both (BVAR (b
->base_buffer
, zv_marker
), base_buffer
,
637 b
->base_buffer
->zv_byte
);
638 XMARKER (BVAR (b
->base_buffer
, zv_marker
))->insertion_type
= 1;
643 /* Give the indirect buffer markers for its narrowing. */
644 BVAR (b
, pt_marker
) = Fmake_marker ();
645 set_marker_both (BVAR (b
, pt_marker
), buf
, b
->pt
, b
->pt_byte
);
646 BVAR (b
, begv_marker
) = Fmake_marker ();
647 set_marker_both (BVAR (b
, begv_marker
), buf
, b
->begv
, b
->begv_byte
);
648 BVAR (b
, zv_marker
) = Fmake_marker ();
649 set_marker_both (BVAR (b
, zv_marker
), buf
, b
->zv
, b
->zv_byte
);
650 XMARKER (BVAR (b
, zv_marker
))->insertion_type
= 1;
654 struct buffer
*old_b
= current_buffer
;
656 clone_per_buffer_values (b
->base_buffer
, b
);
657 BVAR (b
, filename
) = Qnil
;
658 BVAR (b
, file_truename
) = Qnil
;
659 BVAR (b
, display_count
) = make_number (0);
660 BVAR (b
, backed_up
) = Qnil
;
661 BVAR (b
, auto_save_file_name
) = Qnil
;
662 set_buffer_internal_1 (b
);
663 Fset (intern ("buffer-save-without-query"), Qnil
);
664 Fset (intern ("buffer-file-number"), Qnil
);
665 Fset (intern ("buffer-stale-function"), Qnil
);
666 set_buffer_internal_1 (old_b
);
669 /* Run buffer-list-update-hook. */
670 if (!NILP (Vrun_hooks
))
671 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
677 delete_all_overlays (struct buffer
*b
)
681 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
682 have to empty the list, otherwise we end up with overlays that
683 think they belong to this buffer while the buffer doesn't know about
685 while (b
->overlays_before
)
687 XSETMISC (overlay
, b
->overlays_before
);
688 Fdelete_overlay (overlay
);
690 while (b
->overlays_after
)
692 XSETMISC (overlay
, b
->overlays_after
);
693 Fdelete_overlay (overlay
);
695 eassert (b
->overlays_before
== NULL
);
696 eassert (b
->overlays_after
== NULL
);
699 /* Reinitialize everything about a buffer except its name and contents
701 If called on an already-initialized buffer, the list of overlays
702 should be deleted before calling this function, otherwise we end up
703 with overlays that claim to belong to the buffer but the buffer
704 claims it doesn't belong to it. */
707 reset_buffer (register struct buffer
*b
)
709 BVAR (b
, filename
) = Qnil
;
710 BVAR (b
, file_truename
) = Qnil
;
711 BVAR (b
, directory
) = (current_buffer
) ? BVAR (current_buffer
, directory
) : Qnil
;
713 b
->modtime_size
= -1;
714 XSETFASTINT (BVAR (b
, save_length
), 0);
715 b
->last_window_start
= 1;
716 /* It is more conservative to start out "changed" than "unchanged". */
718 b
->prevent_redisplay_optimizations_p
= 1;
719 BVAR (b
, backed_up
) = Qnil
;
720 BUF_AUTOSAVE_MODIFF (b
) = 0;
721 b
->auto_save_failure_time
= -1;
722 BVAR (b
, auto_save_file_name
) = Qnil
;
723 BVAR (b
, read_only
) = Qnil
;
724 b
->overlays_before
= NULL
;
725 b
->overlays_after
= NULL
;
726 b
->overlay_center
= BEG
;
727 BVAR (b
, mark_active
) = Qnil
;
728 BVAR (b
, point_before_scroll
) = Qnil
;
729 BVAR (b
, file_format
) = Qnil
;
730 BVAR (b
, auto_save_file_format
) = Qt
;
731 BVAR (b
, last_selected_window
) = Qnil
;
732 XSETINT (BVAR (b
, display_count
), 0);
733 BVAR (b
, display_time
) = Qnil
;
734 BVAR (b
, enable_multibyte_characters
) = BVAR (&buffer_defaults
, enable_multibyte_characters
);
735 BVAR (b
, cursor_type
) = BVAR (&buffer_defaults
, cursor_type
);
736 BVAR (b
, extra_line_spacing
) = BVAR (&buffer_defaults
, extra_line_spacing
);
738 b
->display_error_modiff
= 0;
741 /* Reset buffer B's local variables info.
742 Don't use this on a buffer that has already been in use;
743 it does not treat permanent locals consistently.
744 Instead, use Fkill_all_local_variables.
746 If PERMANENT_TOO is 1, then we reset permanent
747 buffer-local variables. If PERMANENT_TOO is 0,
748 we preserve those. */
751 reset_buffer_local_variables (register struct buffer
*b
, int permanent_too
)
756 /* Reset the major mode to Fundamental, together with all the
757 things that depend on the major mode.
758 default-major-mode is handled at a higher level.
759 We ignore it here. */
760 BVAR (b
, major_mode
) = Qfundamental_mode
;
761 BVAR (b
, keymap
) = Qnil
;
762 BVAR (b
, mode_name
) = QSFundamental
;
763 BVAR (b
, minor_modes
) = Qnil
;
765 /* If the standard case table has been altered and invalidated,
766 fix up its insides first. */
767 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
768 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
769 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
770 Fset_standard_case_table (Vascii_downcase_table
);
772 BVAR (b
, downcase_table
) = Vascii_downcase_table
;
773 BVAR (b
, upcase_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
774 BVAR (b
, case_canon_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
775 BVAR (b
, case_eqv_table
) = XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
776 BVAR (b
, invisibility_spec
) = Qt
;
778 /* Reset all (or most) per-buffer variables to their defaults. */
780 BVAR (b
, local_var_alist
) = Qnil
;
783 Lisp_Object tmp
, prop
, last
= Qnil
;
784 for (tmp
= BVAR (b
, local_var_alist
); CONSP (tmp
); tmp
= XCDR (tmp
))
785 if (!NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
787 /* If permanent-local, keep it. */
789 if (EQ (prop
, Qpermanent_local_hook
))
791 /* This is a partially permanent hook variable.
792 Preserve only the elements that want to be preserved. */
793 Lisp_Object list
, newlist
;
794 list
= XCDR (XCAR (tmp
));
798 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
800 Lisp_Object elt
= XCAR (list
);
801 /* Preserve element ELT if it's t,
802 if it is a function with a `permanent-local-hook' property,
803 or if it's not a symbol. */
806 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
807 newlist
= Fcons (elt
, newlist
);
809 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
812 /* Delete this local variable. */
813 else if (NILP (last
))
814 BVAR (b
, local_var_alist
) = XCDR (tmp
);
816 XSETCDR (last
, XCDR (tmp
));
819 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
820 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
821 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
823 /* For each slot that has a default value,
824 copy that into the slot. */
826 /* buffer-local Lisp variables start at `undo_list',
827 tho only the ones from `name' on are GC'd normally. */
828 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
830 offset
+= sizeof (Lisp_Object
))
832 int idx
= PER_BUFFER_IDX (offset
);
835 || buffer_permanent_local_flags
[idx
] == 0)))
836 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
840 /* We split this away from generate-new-buffer, because rename-buffer
841 and set-visited-file-name ought to be able to use this to really
842 rename the buffer properly. */
844 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
,
845 Sgenerate_new_buffer_name
, 1, 2, 0,
846 doc
: /* Return a string that is the name of no existing buffer based on NAME.
847 If there is no live buffer named NAME, then return NAME.
848 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
849 \(starting at 2) until an unused name is found, and then return that name.
850 Optional second argument IGNORE specifies a name that is okay to use (if
851 it is in the sequence to be tried) even if a buffer with that name exists. */)
852 (register Lisp_Object name
, Lisp_Object ignore
)
854 register Lisp_Object gentemp
, tem
;
856 char number
[INT_BUFSIZE_BOUND (EMACS_INT
) + sizeof "<>"];
860 tem
= Fstring_equal (name
, ignore
);
863 tem
= Fget_buffer (name
);
870 sprintf (number
, "<%"pI
"d>", ++count
);
871 gentemp
= concat2 (name
, build_string (number
));
872 tem
= Fstring_equal (gentemp
, ignore
);
875 tem
= Fget_buffer (gentemp
);
882 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
883 doc
: /* Return the name of BUFFER, as a string.
884 BUFFER defaults to the current buffer.
885 Return nil if BUFFER has been killed. */)
886 (register Lisp_Object buffer
)
889 return BVAR (current_buffer
, name
);
890 CHECK_BUFFER (buffer
);
891 return BVAR (XBUFFER (buffer
), name
);
894 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
895 doc
: /* Return name of file BUFFER is visiting, or nil if none.
896 No argument or nil as argument means use the current buffer. */)
897 (register Lisp_Object buffer
)
900 return BVAR (current_buffer
, filename
);
901 CHECK_BUFFER (buffer
);
902 return BVAR (XBUFFER (buffer
), filename
);
905 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
907 doc
: /* Return the base buffer of indirect buffer BUFFER.
908 If BUFFER is not indirect, return nil.
909 BUFFER defaults to the current buffer. */)
910 (register Lisp_Object buffer
)
913 Lisp_Object base_buffer
;
916 base
= current_buffer
->base_buffer
;
919 CHECK_BUFFER (buffer
);
920 base
= XBUFFER (buffer
)->base_buffer
;
925 XSETBUFFER (base_buffer
, base
);
929 DEFUN ("buffer-local-value", Fbuffer_local_value
,
930 Sbuffer_local_value
, 2, 2, 0,
931 doc
: /* Return the value of VARIABLE in BUFFER.
932 If VARIABLE does not have a buffer-local binding in BUFFER, the value
933 is the default binding of the variable. */)
934 (register Lisp_Object variable
, register Lisp_Object buffer
)
936 register struct buffer
*buf
;
937 register Lisp_Object result
;
938 struct Lisp_Symbol
*sym
;
940 CHECK_SYMBOL (variable
);
941 CHECK_BUFFER (buffer
);
942 buf
= XBUFFER (buffer
);
943 sym
= XSYMBOL (variable
);
946 switch (sym
->redirect
)
948 case SYMBOL_VARALIAS
: sym
= indirect_variable (sym
); goto start
;
949 case SYMBOL_PLAINVAL
: result
= SYMBOL_VAL (sym
); break;
950 case SYMBOL_LOCALIZED
:
951 { /* Look in local_var_alist. */
952 struct Lisp_Buffer_Local_Value
*blv
= SYMBOL_BLV (sym
);
953 XSETSYMBOL (variable
, sym
); /* Update In case of aliasing. */
954 result
= Fassoc (variable
, BVAR (buf
, local_var_alist
));
958 { /* What binding is loaded right now? */
959 Lisp_Object current_alist_element
= blv
->valcell
;
961 /* The value of the currently loaded binding is not
962 stored in it, but rather in the realvalue slot.
963 Store that value into the binding it belongs to
964 in case that is the one we are about to use. */
966 XSETCDR (current_alist_element
,
967 do_symval_forwarding (blv
->fwd
));
969 /* Now get the (perhaps updated) value out of the binding. */
970 result
= XCDR (result
);
973 result
= Fdefault_value (variable
);
976 case SYMBOL_FORWARDED
:
978 union Lisp_Fwd
*fwd
= SYMBOL_FWD (sym
);
979 if (BUFFER_OBJFWDP (fwd
))
980 result
= PER_BUFFER_VALUE (buf
, XBUFFER_OBJFWD (fwd
)->offset
);
982 result
= Fdefault_value (variable
);
988 if (!EQ (result
, Qunbound
))
991 xsignal1 (Qvoid_variable
, variable
);
994 /* Return an alist of the Lisp-level buffer-local bindings of
995 buffer BUF. That is, don't include the variables maintained
996 in special slots in the buffer object. */
999 buffer_lisp_local_variables (struct buffer
*buf
)
1001 Lisp_Object result
= Qnil
;
1002 register Lisp_Object tail
;
1003 for (tail
= BVAR (buf
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1005 Lisp_Object val
, elt
;
1009 /* Reference each variable in the alist in buf.
1010 If inquiring about the current buffer, this gets the current values,
1011 so store them into the alist so the alist is up to date.
1012 If inquiring about some other buffer, this swaps out any values
1013 for that buffer, making the alist up to date automatically. */
1014 val
= find_symbol_value (XCAR (elt
));
1015 /* Use the current buffer value only if buf is the current buffer. */
1016 if (buf
!= current_buffer
)
1019 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
1025 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1026 Sbuffer_local_variables
, 0, 1, 0,
1027 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1028 Most elements look like (SYMBOL . VALUE), describing one variable.
1029 For a symbol that is locally unbound, just the symbol appears in the value.
1030 Note that storing new VALUEs in these elements doesn't change the variables.
1031 No argument or nil as argument means use current buffer as BUFFER. */)
1032 (register Lisp_Object buffer
)
1034 register struct buffer
*buf
;
1035 register Lisp_Object result
;
1038 buf
= current_buffer
;
1041 CHECK_BUFFER (buffer
);
1042 buf
= XBUFFER (buffer
);
1045 result
= buffer_lisp_local_variables (buf
);
1047 /* Add on all the variables stored in special slots. */
1051 /* buffer-local Lisp variables start at `undo_list',
1052 tho only the ones from `name' on are GC'd normally. */
1053 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
1054 offset
< sizeof (struct buffer
);
1055 /* sizeof EMACS_INT == sizeof Lisp_Object */
1056 offset
+= (sizeof (EMACS_INT
)))
1058 idx
= PER_BUFFER_IDX (offset
);
1059 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1060 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1061 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1062 PER_BUFFER_VALUE (buf
, offset
)),
1070 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1072 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1073 No argument or nil as argument means use current buffer as BUFFER. */)
1074 (register Lisp_Object buffer
)
1076 register struct buffer
*buf
;
1078 buf
= current_buffer
;
1081 CHECK_BUFFER (buffer
);
1082 buf
= XBUFFER (buffer
);
1085 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1088 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1090 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1091 A non-nil FLAG means mark the buffer modified. */)
1092 (register Lisp_Object flag
)
1094 register int already
;
1095 register Lisp_Object fn
;
1096 Lisp_Object buffer
, window
;
1098 #ifdef CLASH_DETECTION
1099 /* If buffer becoming modified, lock the file.
1100 If buffer becoming unmodified, unlock the file. */
1102 fn
= BVAR (current_buffer
, file_truename
);
1103 /* Test buffer-file-name so that binding it to nil is effective. */
1104 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1106 already
= SAVE_MODIFF
< MODIFF
;
1107 if (!already
&& !NILP (flag
))
1109 else if (already
&& NILP (flag
))
1112 #endif /* CLASH_DETECTION */
1114 /* Here we have a problem. SAVE_MODIFF is used here to encode
1115 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1116 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1117 modify SAVE_MODIFF to affect one, we may affect the other
1119 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1120 if SAVE_MODIFF<auto_save_modified that means we risk changing
1121 recent-auto-save-p from t to nil.
1122 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1123 we risk changing recent-auto-save-p from nil to t. */
1124 SAVE_MODIFF
= (NILP (flag
)
1125 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1127 /* Let's try to preserve recent-auto-save-p. */
1128 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1129 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1130 we can either decrease SAVE_MODIFF and auto_save_modified
1131 or increase MODIFF. */
1134 /* Set update_mode_lines only if buffer is displayed in some window.
1135 Packages like jit-lock or lazy-lock preserve a buffer's modified
1136 state by recording/restoring the state around blocks of code.
1137 Setting update_mode_lines makes redisplay consider all windows
1138 (on all frames). Stealth fontification of buffers not displayed
1139 would incur additional redisplay costs if we'd set
1140 update_modes_lines unconditionally.
1142 Ideally, I think there should be another mechanism for fontifying
1143 buffers without "modifying" buffers, or redisplay should be
1144 smarter about updating the `*' in mode lines. --gerd */
1145 XSETBUFFER (buffer
, current_buffer
);
1146 window
= Fget_buffer_window (buffer
, Qt
);
1147 if (WINDOWP (window
))
1149 ++update_mode_lines
;
1150 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1156 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1157 Srestore_buffer_modified_p
, 1, 1, 0,
1158 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1159 It is not ensured that mode lines will be updated to show the modified
1160 state of the current buffer. Use with care. */)
1163 #ifdef CLASH_DETECTION
1166 /* If buffer becoming modified, lock the file.
1167 If buffer becoming unmodified, unlock the file. */
1169 fn
= BVAR (current_buffer
, file_truename
);
1170 /* Test buffer-file-name so that binding it to nil is effective. */
1171 if (!NILP (fn
) && ! NILP (BVAR (current_buffer
, filename
)))
1173 int already
= SAVE_MODIFF
< MODIFF
;
1174 if (!already
&& !NILP (flag
))
1176 else if (already
&& NILP (flag
))
1179 #endif /* CLASH_DETECTION */
1181 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1185 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1187 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1188 Each buffer has a tick counter which is incremented each time the
1189 text in that buffer is changed. It wraps around occasionally.
1190 No argument or nil as argument means use current buffer as BUFFER. */)
1191 (register Lisp_Object buffer
)
1193 register struct buffer
*buf
;
1195 buf
= current_buffer
;
1198 CHECK_BUFFER (buffer
);
1199 buf
= XBUFFER (buffer
);
1202 return make_number (BUF_MODIFF (buf
));
1205 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1206 Sbuffer_chars_modified_tick
, 0, 1, 0,
1207 doc
: /* Return BUFFER's character-change tick counter.
1208 Each buffer has a character-change tick counter, which is set to the
1209 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1210 time text in that buffer is inserted or deleted. By comparing the
1211 values returned by two individual calls of `buffer-chars-modified-tick',
1212 you can tell whether a character change occurred in that buffer in
1213 between these calls. No argument or nil as argument means use current
1214 buffer as BUFFER. */)
1215 (register Lisp_Object buffer
)
1217 register struct buffer
*buf
;
1219 buf
= current_buffer
;
1222 CHECK_BUFFER (buffer
);
1223 buf
= XBUFFER (buffer
);
1226 return make_number (BUF_CHARS_MODIFF (buf
));
1229 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1230 "(list (read-string \"Rename buffer (to new name): \" \
1231 nil 'buffer-name-history (buffer-name (current-buffer))) \
1232 current-prefix-arg)",
1233 doc
: /* Change current buffer's name to NEWNAME (a string).
1234 If second arg UNIQUE is nil or omitted, it is an error if a
1235 buffer named NEWNAME already exists.
1236 If UNIQUE is non-nil, come up with a new name using
1237 `generate-new-buffer-name'.
1238 Interactively, you can set UNIQUE with a prefix argument.
1239 We return the name we actually gave the buffer.
1240 This does not change the name of the visited file (if any). */)
1241 (register Lisp_Object newname
, Lisp_Object unique
)
1243 register Lisp_Object tem
, buf
;
1245 CHECK_STRING (newname
);
1247 if (SCHARS (newname
) == 0)
1248 error ("Empty string is invalid as a buffer name");
1250 tem
= Fget_buffer (newname
);
1253 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1254 rename the buffer automatically so you can create another
1255 with the original name. It makes UNIQUE equivalent to
1256 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1257 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1258 return BVAR (current_buffer
, name
);
1260 newname
= Fgenerate_new_buffer_name (newname
, BVAR (current_buffer
, name
));
1262 error ("Buffer name `%s' is in use", SDATA (newname
));
1265 BVAR (current_buffer
, name
) = newname
;
1267 /* Catch redisplay's attention. Unless we do this, the mode lines for
1268 any windows displaying current_buffer will stay unchanged. */
1269 update_mode_lines
++;
1271 XSETBUFFER (buf
, current_buffer
);
1272 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1273 if (NILP (BVAR (current_buffer
, filename
))
1274 && !NILP (BVAR (current_buffer
, auto_save_file_name
)))
1275 call0 (intern ("rename-auto-save-file"));
1277 /* Run buffer-list-update-hook. */
1278 if (!NILP (Vrun_hooks
))
1279 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1281 /* Refetch since that last call may have done GC. */
1282 return BVAR (current_buffer
, name
);
1285 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1286 doc
: /* Return most recently selected buffer other than BUFFER.
1287 Buffers not visible in windows are preferred to visible buffers, unless
1288 optional second argument VISIBLE-OK is non-nil. Ignore the argument
1289 BUFFER unless it denotes a live buffer. If the optional third argument
1290 FRAME is non-nil, use that frame's buffer list instead of the selected
1291 frame's buffer list.
1293 The buffer is found by scanning the selected or specified frame's buffer
1294 list first, followed by the list of all buffers. If no other buffer
1295 exists, return the buffer `*scratch*' (creating it if necessary). */)
1296 (register Lisp_Object buffer
, Lisp_Object visible_ok
, Lisp_Object frame
)
1298 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1299 Lisp_Object tail
, buf
, pred
;
1300 Lisp_Object notsogood
= Qnil
;
1303 frame
= selected_frame
;
1305 CHECK_FRAME (frame
);
1307 pred
= frame_buffer_predicate (frame
);
1308 /* Consider buffers that have been seen in the frame first. */
1309 tail
= XFRAME (frame
)->buffer_list
;
1310 for (; CONSP (tail
); tail
= XCDR (tail
))
1313 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1314 && !NILP (BVAR (XBUFFER (buf
), name
))
1315 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1316 /* If the frame has a buffer_predicate, disregard buffers that
1317 don't fit the predicate. */
1318 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1320 if (!NILP (visible_ok
)
1321 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1323 else if (NILP (notsogood
))
1328 /* Consider alist of all buffers next. */
1329 tail
= Vbuffer_alist
;
1330 for (; CONSP (tail
); tail
= XCDR (tail
))
1332 buf
= Fcdr (XCAR (tail
));
1333 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1334 && !NILP (BVAR (XBUFFER (buf
), name
))
1335 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' ')
1336 /* If the frame has a buffer_predicate, disregard buffers that
1337 don't fit the predicate. */
1338 && (NILP (pred
) || !NILP (call1 (pred
, buf
))))
1340 if (!NILP (visible_ok
)
1341 || NILP (Fget_buffer_window (buf
, Qvisible
)))
1343 else if (NILP (notsogood
))
1348 if (!NILP (notsogood
))
1352 buf
= Fget_buffer (build_string ("*scratch*"));
1355 buf
= Fget_buffer_create (build_string ("*scratch*"));
1356 Fset_buffer_major_mode (buf
);
1362 /* The following function is a safe variant of Fother_buffer: It doesn't
1363 pay attention to any frame-local buffer lists, doesn't care about
1364 visibility of buffers, and doesn't evaluate any frame predicates. */
1367 other_buffer_safely (Lisp_Object buffer
)
1369 Lisp_Object
Fset_buffer_major_mode (Lisp_Object buffer
);
1370 Lisp_Object tail
, buf
;
1372 tail
= Vbuffer_alist
;
1373 for (; CONSP (tail
); tail
= XCDR (tail
))
1375 buf
= Fcdr (XCAR (tail
));
1376 if (BUFFERP (buf
) && !EQ (buf
, buffer
)
1377 && !NILP (BVAR (XBUFFER (buf
), name
))
1378 && (SREF (BVAR (XBUFFER (buf
), name
), 0) != ' '))
1382 buf
= Fget_buffer (build_string ("*scratch*"));
1385 buf
= Fget_buffer_create (build_string ("*scratch*"));
1386 Fset_buffer_major_mode (buf
);
1392 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1394 doc
: /* Start keeping undo information for buffer BUFFER.
1395 No argument or nil as argument means do this for the current buffer. */)
1396 (register Lisp_Object buffer
)
1398 Lisp_Object real_buffer
;
1401 XSETBUFFER (real_buffer
, current_buffer
);
1404 real_buffer
= Fget_buffer (buffer
);
1405 if (NILP (real_buffer
))
1409 if (EQ (BVAR (XBUFFER (real_buffer
), undo_list
), Qt
))
1410 BVAR (XBUFFER (real_buffer
), undo_list
) = Qnil
;
1416 DEFVAR_LISP ("kill-buffer-hook", ..., "\
1417 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1418 The buffer being killed will be current while the hook is running.\n\
1421 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1422 doc
: /* Kill buffer BUFFER-OR-NAME.
1423 The argument may be a buffer or the name of an existing buffer.
1424 Argument nil or omitted means kill the current buffer. Return t if the
1425 buffer is actually killed, nil otherwise.
1427 This function calls `replace-buffer-in-windows' for cleaning up all
1428 windows currently displaying the buffer to be killed. The functions in
1429 `kill-buffer-query-functions' are called with the buffer to be killed as
1430 the current buffer. If any of them returns nil, the buffer is not
1431 killed. The hook `kill-buffer-hook' is run before the buffer is
1432 actually killed. The buffer being killed will be current while the hook
1435 Any processes that have this buffer as the `process-buffer' are killed
1437 (Lisp_Object buffer_or_name
)
1440 register struct buffer
*b
;
1441 register Lisp_Object tem
;
1442 register struct Lisp_Marker
*m
;
1443 struct gcpro gcpro1
;
1445 if (NILP (buffer_or_name
))
1446 buffer
= Fcurrent_buffer ();
1448 buffer
= Fget_buffer (buffer_or_name
);
1450 nsberror (buffer_or_name
);
1452 b
= XBUFFER (buffer
);
1454 /* Avoid trouble for buffer already dead. */
1455 if (NILP (BVAR (b
, name
)))
1458 /* Query if the buffer is still modified. */
1459 if (INTERACTIVE
&& !NILP (BVAR (b
, filename
))
1460 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1463 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1464 BVAR (b
, name
), make_number (0)));
1470 /* Run hooks with the buffer to be killed the current buffer. */
1472 int count
= SPECPDL_INDEX ();
1473 Lisp_Object arglist
[1];
1475 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1476 set_buffer_internal (b
);
1478 /* First run the query functions; if any query is answered no,
1479 don't kill the buffer. */
1480 arglist
[0] = Qkill_buffer_query_functions
;
1481 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1483 return unbind_to (count
, Qnil
);
1485 /* Then run the hooks. */
1486 Frun_hooks (1, &Qkill_buffer_hook
);
1487 unbind_to (count
, Qnil
);
1490 /* We have no more questions to ask. Verify that it is valid
1491 to kill the buffer. This must be done after the questions
1492 since anything can happen within do_yes_or_no_p. */
1494 /* Don't kill the minibuffer now current. */
1495 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1498 if (NILP (BVAR (b
, name
)))
1501 /* When we kill a base buffer, kill all its indirect buffers.
1502 We do it at this stage so nothing terrible happens if they
1503 ask questions or their hooks get errors. */
1504 if (! b
->base_buffer
)
1506 struct buffer
*other
;
1510 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
1511 /* all_buffers contains dead buffers too;
1512 don't re-kill them. */
1513 if (other
->base_buffer
== b
&& !NILP (BVAR (other
, name
)))
1516 XSETBUFFER (buf
, other
);
1523 /* Make this buffer not be current.
1524 In the process, notice if this is the sole visible buffer
1525 and give up if so. */
1526 if (b
== current_buffer
)
1528 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1530 if (b
== current_buffer
)
1534 /* Notice if the buffer to kill is the sole visible buffer
1535 when we're currently in the mini-buffer, and give up if so. */
1536 XSETBUFFER (tem
, current_buffer
);
1537 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1539 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1540 if (EQ (buffer
, tem
))
1544 /* Now there is no question: we can kill the buffer. */
1546 #ifdef CLASH_DETECTION
1547 /* Unlock this buffer's file, if it is locked. */
1549 #endif /* CLASH_DETECTION */
1552 kill_buffer_processes (buffer
);
1555 /* Killing buffer processes may run sentinels which may
1556 have called kill-buffer. */
1558 if (NILP (BVAR (b
, name
)))
1561 /* These may run Lisp code and into infinite loops (if someone
1562 insisted on circular lists) so allow quitting here. */
1563 replace_buffer_in_windows (buffer
);
1564 frames_discard_buffer (buffer
);
1566 clear_charpos_cache (b
);
1568 tem
= Vinhibit_quit
;
1570 /* Remove the buffer from the list of all buffers. */
1571 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1572 /* If replace_buffer_in_windows didn't do its job correctly fix that
1574 replace_buffer_in_windows_safely (buffer
);
1575 Vinhibit_quit
= tem
;
1577 /* Delete any auto-save file, if we saved it in this session.
1578 But not if the buffer is modified. */
1579 if (STRINGP (BVAR (b
, auto_save_file_name
))
1580 && BUF_AUTOSAVE_MODIFF (b
) != 0
1581 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1582 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1583 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1586 delete = Fsymbol_value (intern ("delete-auto-save-files"));
1587 if (! NILP (delete))
1588 internal_delete_file (BVAR (b
, auto_save_file_name
));
1593 /* Unchain all markers that belong to this indirect buffer.
1594 Don't unchain the markers that belong to the base buffer
1595 or its other indirect buffers. */
1596 for (m
= BUF_MARKERS (b
); m
; )
1598 struct Lisp_Marker
*next
= m
->next
;
1606 /* Unchain all markers of this buffer and its indirect buffers.
1607 and leave them pointing nowhere. */
1608 for (m
= BUF_MARKERS (b
); m
; )
1610 struct Lisp_Marker
*next
= m
->next
;
1615 BUF_MARKERS (b
) = NULL
;
1616 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1618 /* Perhaps we should explicitly free the interval tree here... */
1621 /* Reset the local variables, so that this buffer's local values
1622 won't be protected from GC. They would be protected
1623 if they happened to remain encached in their symbols.
1624 This gets rid of them for certain. */
1625 swap_out_buffer_local_variables (b
);
1626 reset_buffer_local_variables (b
, 1);
1628 BVAR (b
, name
) = Qnil
;
1631 if (! b
->base_buffer
)
1632 free_buffer_text (b
);
1634 if (b
->newline_cache
)
1636 free_region_cache (b
->newline_cache
);
1637 b
->newline_cache
= 0;
1639 if (b
->width_run_cache
)
1641 free_region_cache (b
->width_run_cache
);
1642 b
->width_run_cache
= 0;
1644 BVAR (b
, width_table
) = Qnil
;
1646 BVAR (b
, undo_list
) = Qnil
;
1648 /* Run buffer-list-update-hook. */
1649 if (!NILP (Vrun_hooks
))
1650 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1655 /* Move association for BUFFER to the front of buffer (a)lists. Since
1656 we do this each time BUFFER is selected visibly, the more recently
1657 selected buffers are always closer to the front of those lists. This
1658 means that other_buffer is more likely to choose a relevant buffer.
1660 Note that this moves BUFFER to the front of the buffer lists of the
1661 selected frame even if BUFFER is not shown there. If BUFFER is not
1662 shown in the selected frame, consider the present behavior a feature.
1663 `select-window' gets this right since it shows BUFFER in the selected
1664 window when calling us. */
1667 record_buffer (Lisp_Object buffer
)
1669 Lisp_Object aelt
, aelt_cons
, tem
;
1670 register struct frame
*f
= XFRAME (selected_frame
);
1672 CHECK_BUFFER (buffer
);
1674 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1675 Don't allow quitting since this might leave the buffer list in an
1676 inconsistent state. */
1677 tem
= Vinhibit_quit
;
1679 aelt
= Frassq (buffer
, Vbuffer_alist
);
1680 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1681 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1682 XSETCDR (aelt_cons
, Vbuffer_alist
);
1683 Vbuffer_alist
= aelt_cons
;
1684 Vinhibit_quit
= tem
;
1686 /* Update buffer list of selected frame. */
1687 f
->buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buffer_list
));
1688 f
->buried_buffer_list
= Fdelq (buffer
, f
->buried_buffer_list
);
1690 /* Run buffer-list-update-hook. */
1691 if (!NILP (Vrun_hooks
))
1692 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1695 DEFUN ("record-buffer", Frecord_buffer
, Srecord_buffer
, 1, 1, 0,
1696 doc
: /* Move BUFFER to the front of the buffer list.
1698 (Lisp_Object buffer
)
1700 CHECK_BUFFER (buffer
);
1702 record_buffer (buffer
);
1707 /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
1708 buffer is killed. For the selected frame's buffer list this moves
1709 BUFFER to its end even if it was never shown in that frame. If
1710 this happens we have a feature, hence `unrecord-buffer' should be
1711 called only when BUFFER was shown in the selected frame. */
1713 DEFUN ("unrecord-buffer", Funrecord_buffer
, Sunrecord_buffer
, 1, 1, 0,
1714 doc
: /* Move BUFFER to the end of the buffer list.
1716 (Lisp_Object buffer
)
1718 Lisp_Object aelt
, aelt_cons
, tem
;
1719 register struct frame
*f
= XFRAME (selected_frame
);
1721 CHECK_BUFFER (buffer
);
1723 /* Update Vbuffer_alist (we know that it has an entry for BUFFER).
1724 Don't allow quitting since this might leave the buffer list in an
1725 inconsistent state. */
1726 tem
= Vinhibit_quit
;
1728 aelt
= Frassq (buffer
, Vbuffer_alist
);
1729 aelt_cons
= Fmemq (aelt
, Vbuffer_alist
);
1730 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1731 XSETCDR (aelt_cons
, Qnil
);
1732 Vbuffer_alist
= nconc2 (Vbuffer_alist
, aelt_cons
);
1733 Vinhibit_quit
= tem
;
1735 /* Update buffer lists of selected frame. */
1736 f
->buffer_list
= Fdelq (buffer
, f
->buffer_list
);
1737 f
->buried_buffer_list
= Fcons (buffer
, Fdelq (buffer
, f
->buried_buffer_list
));
1739 /* Run buffer-list-update-hook. */
1740 if (!NILP (Vrun_hooks
))
1741 call1 (Vrun_hooks
, Qbuffer_list_update_hook
);
1746 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1747 doc
: /* Set an appropriate major mode for BUFFER.
1748 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1749 according to `default-major-mode'.
1750 Use this function before selecting the buffer, since it may need to inspect
1751 the current buffer's major mode. */)
1752 (Lisp_Object buffer
)
1755 Lisp_Object function
;
1757 CHECK_BUFFER (buffer
);
1759 if (STRINGP (BVAR (XBUFFER (buffer
), name
))
1760 && strcmp (SSDATA (BVAR (XBUFFER (buffer
), name
)), "*scratch*") == 0)
1761 function
= find_symbol_value (intern ("initial-major-mode"));
1764 function
= BVAR (&buffer_defaults
, major_mode
);
1766 && NILP (Fget (BVAR (current_buffer
, major_mode
), Qmode_class
)))
1767 function
= BVAR (current_buffer
, major_mode
);
1770 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1773 count
= SPECPDL_INDEX ();
1775 /* To select a nonfundamental mode,
1776 select the buffer temporarily and then call the mode function. */
1778 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1780 Fset_buffer (buffer
);
1783 return unbind_to (count
, Qnil
);
1786 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1787 doc
: /* Return the current buffer as a Lisp object. */)
1790 register Lisp_Object buf
;
1791 XSETBUFFER (buf
, current_buffer
);
1795 /* Set the current buffer to B.
1797 We previously set windows_or_buffers_changed here to invalidate
1798 global unchanged information in beg_unchanged and end_unchanged.
1799 This is no longer necessary because we now compute unchanged
1800 information on a buffer-basis. Every action affecting other
1801 windows than the selected one requires a select_window at some
1802 time, and that increments windows_or_buffers_changed. */
1805 set_buffer_internal (register struct buffer
*b
)
1807 if (current_buffer
!= b
)
1808 set_buffer_internal_1 (b
);
1811 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1812 This is used by redisplay. */
1815 set_buffer_internal_1 (register struct buffer
*b
)
1817 register struct buffer
*old_buf
;
1818 register Lisp_Object tail
;
1820 #ifdef USE_MMAP_FOR_BUFFERS
1821 if (b
->text
->beg
== NULL
)
1822 enlarge_buffer_text (b
, 0);
1823 #endif /* USE_MMAP_FOR_BUFFERS */
1825 if (current_buffer
== b
)
1828 old_buf
= current_buffer
;
1830 last_known_column_point
= -1; /* invalidate indentation cache */
1834 /* Put the undo list back in the base buffer, so that it appears
1835 that an indirect buffer shares the undo list of its base. */
1836 if (old_buf
->base_buffer
)
1837 BVAR (old_buf
->base_buffer
, undo_list
) = BVAR (old_buf
, undo_list
);
1839 /* If the old current buffer has markers to record PT, BEGV and ZV
1840 when it is not current, update them now. */
1841 record_buffer_markers (old_buf
);
1844 /* Get the undo list from the base buffer, so that it appears
1845 that an indirect buffer shares the undo list of its base. */
1847 BVAR (b
, undo_list
) = BVAR (b
->base_buffer
, undo_list
);
1849 /* If the new current buffer has markers to record PT, BEGV and ZV
1850 when it is not current, fetch them now. */
1851 fetch_buffer_markers (b
);
1853 /* Look down buffer's list of local Lisp variables
1854 to find and update any that forward into C variables. */
1858 for (tail
= BVAR (b
, local_var_alist
); CONSP (tail
); tail
= XCDR (tail
))
1860 Lisp_Object var
= XCAR (XCAR (tail
));
1861 struct Lisp_Symbol
*sym
= XSYMBOL (var
);
1862 if (sym
->redirect
== SYMBOL_LOCALIZED
/* Just to be sure. */
1863 && SYMBOL_BLV (sym
)->fwd
)
1864 /* Just reference the variable
1865 to cause it to become set for this buffer. */
1866 Fsymbol_value (var
);
1869 /* Do the same with any others that were local to the previous buffer */
1870 while (b
!= old_buf
&& (b
= old_buf
, b
));
1873 /* Switch to buffer B temporarily for redisplay purposes.
1874 This avoids certain things that don't need to be done within redisplay. */
1877 set_buffer_temp (struct buffer
*b
)
1879 register struct buffer
*old_buf
;
1881 if (current_buffer
== b
)
1884 old_buf
= current_buffer
;
1887 /* If the old current buffer has markers to record PT, BEGV and ZV
1888 when it is not current, update them now. */
1889 record_buffer_markers (old_buf
);
1891 /* If the new current buffer has markers to record PT, BEGV and ZV
1892 when it is not current, fetch them now. */
1893 fetch_buffer_markers (b
);
1896 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1897 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
1898 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
1899 also `save-excursion' when you want to make a buffer current
1900 temporarily. This function does not display the buffer, so its effect
1901 ends when the current command terminates. Use `switch-to-buffer' or
1902 `pop-to-buffer' to switch buffers permanently. */)
1903 (register Lisp_Object buffer_or_name
)
1905 register Lisp_Object buffer
;
1906 buffer
= Fget_buffer (buffer_or_name
);
1908 nsberror (buffer_or_name
);
1909 if (NILP (BVAR (XBUFFER (buffer
), name
)))
1910 error ("Selecting deleted buffer");
1911 set_buffer_internal (XBUFFER (buffer
));
1915 /* Set the current buffer to BUFFER provided it is alive. */
1918 set_buffer_if_live (Lisp_Object buffer
)
1920 if (! NILP (BVAR (XBUFFER (buffer
), name
)))
1921 Fset_buffer (buffer
);
1925 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1926 Sbarf_if_buffer_read_only
, 0, 0, 0,
1927 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1930 if (!NILP (BVAR (current_buffer
, read_only
))
1931 && NILP (Vinhibit_read_only
))
1932 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
1936 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1937 doc
: /* Delete the entire contents of the current buffer.
1938 Any narrowing restriction in effect (see `narrow-to-region') is removed,
1939 so the buffer is truly empty after this. */)
1946 current_buffer
->last_window_start
= 1;
1947 /* Prevent warnings, or suspension of auto saving, that would happen
1948 if future size is less than past size. Use of erase-buffer
1949 implies that the future text is not really related to the past text. */
1950 XSETFASTINT (BVAR (current_buffer
, save_length
), 0);
1955 validate_region (register Lisp_Object
*b
, register Lisp_Object
*e
)
1957 CHECK_NUMBER_COERCE_MARKER (*b
);
1958 CHECK_NUMBER_COERCE_MARKER (*e
);
1960 if (XINT (*b
) > XINT (*e
))
1963 tem
= *b
; *b
= *e
; *e
= tem
;
1966 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1967 && XINT (*e
) <= ZV
))
1968 args_out_of_range (*b
, *e
);
1971 /* Advance BYTE_POS up to a character boundary
1972 and return the adjusted position. */
1975 advance_to_char_boundary (EMACS_INT byte_pos
)
1979 if (byte_pos
== BEG
)
1980 /* Beginning of buffer is always a character boundary. */
1983 c
= FETCH_BYTE (byte_pos
);
1984 if (! CHAR_HEAD_P (c
))
1986 /* We should advance BYTE_POS only when C is a constituent of a
1987 multibyte sequence. */
1988 EMACS_INT orig_byte_pos
= byte_pos
;
1993 c
= FETCH_BYTE (byte_pos
);
1995 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1997 if (byte_pos
< orig_byte_pos
)
1998 byte_pos
= orig_byte_pos
;
1999 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2000 surely advance to the correct character boundary. If C is
2001 not, BYTE_POS was unchanged. */
2008 extern void r_alloc_reset_variable (POINTER_TYPE
*, POINTER_TYPE
*);
2009 #endif /* REL_ALLOC */
2011 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2013 doc
: /* Swap the text between current buffer and BUFFER. */)
2014 (Lisp_Object buffer
)
2016 struct buffer
*other_buffer
;
2017 CHECK_BUFFER (buffer
);
2018 other_buffer
= XBUFFER (buffer
);
2020 if (NILP (BVAR (other_buffer
, name
)))
2021 error ("Cannot swap a dead buffer's text");
2023 /* Actually, it probably works just fine.
2024 * if (other_buffer == current_buffer)
2025 * error ("Cannot swap a buffer's text with itself"); */
2027 /* Actually, this may be workable as well, tho probably only if they're
2029 if (other_buffer
->base_buffer
2030 || current_buffer
->base_buffer
)
2031 error ("Cannot swap indirect buffers's text");
2033 { /* This is probably harder to make work. */
2034 struct buffer
*other
;
2035 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2036 if (other
->base_buffer
== other_buffer
2037 || other
->base_buffer
== current_buffer
)
2038 error ("One of the buffers to swap has indirect buffers");
2041 #define swapfield(field, type) \
2043 type tmp##field = other_buffer->field; \
2044 other_buffer->field = current_buffer->field; \
2045 current_buffer->field = tmp##field; \
2047 #define swapfield_(field, type) \
2049 type tmp##field = BVAR (other_buffer, field); \
2050 BVAR (other_buffer, field) = BVAR (current_buffer, field); \
2051 BVAR (current_buffer, field) = tmp##field; \
2054 swapfield (own_text
, struct buffer_text
);
2055 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2056 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2058 r_alloc_reset_variable ((POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
,
2059 (POINTER_TYPE
**) &other_buffer
->own_text
.beg
);
2060 r_alloc_reset_variable ((POINTER_TYPE
**) &other_buffer
->own_text
.beg
,
2061 (POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
);
2062 #endif /* REL_ALLOC */
2064 swapfield (pt
, EMACS_INT
);
2065 swapfield (pt_byte
, EMACS_INT
);
2066 swapfield (begv
, EMACS_INT
);
2067 swapfield (begv_byte
, EMACS_INT
);
2068 swapfield (zv
, EMACS_INT
);
2069 swapfield (zv_byte
, EMACS_INT
);
2070 eassert (!current_buffer
->base_buffer
);
2071 eassert (!other_buffer
->base_buffer
);
2072 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2073 swapfield (newline_cache
, struct region_cache
*);
2074 swapfield (width_run_cache
, struct region_cache
*);
2075 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2076 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2077 swapfield (overlays_before
, struct Lisp_Overlay
*);
2078 swapfield (overlays_after
, struct Lisp_Overlay
*);
2079 swapfield (overlay_center
, EMACS_INT
);
2080 swapfield_ (undo_list
, Lisp_Object
);
2081 swapfield_ (mark
, Lisp_Object
);
2082 swapfield_ (enable_multibyte_characters
, Lisp_Object
);
2083 swapfield_ (bidi_display_reordering
, Lisp_Object
);
2084 swapfield_ (bidi_paragraph_direction
, Lisp_Object
);
2085 /* FIXME: Not sure what we should do with these *_marker fields.
2086 Hopefully they're just nil anyway. */
2087 swapfield_ (pt_marker
, Lisp_Object
);
2088 swapfield_ (begv_marker
, Lisp_Object
);
2089 swapfield_ (zv_marker
, Lisp_Object
);
2090 BVAR (current_buffer
, point_before_scroll
) = Qnil
;
2091 BVAR (other_buffer
, point_before_scroll
) = Qnil
;
2093 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2094 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2095 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2096 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2097 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2098 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2099 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2101 struct Lisp_Marker
*m
;
2102 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2103 if (m
->buffer
== other_buffer
)
2104 m
->buffer
= current_buffer
;
2106 /* Since there's no indirect buffer in sight, markers on
2107 BUF_MARKERS(buf) should either be for `buf' or dead. */
2108 eassert (!m
->buffer
);
2109 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2110 if (m
->buffer
== current_buffer
)
2111 m
->buffer
= other_buffer
;
2113 /* Since there's no indirect buffer in sight, markers on
2114 BUF_MARKERS(buf) should either be for `buf' or dead. */
2115 eassert (!m
->buffer
);
2117 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2118 So since we just swapped the markers between the two buffers, we need
2119 to undo the effect of this swap for window markers. */
2120 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2121 Lisp_Object buf1
, buf2
;
2122 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2124 while (NILP (Fmemq (w
, ws
)))
2127 if (MARKERP (XWINDOW (w
)->pointm
)
2128 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2129 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2130 Fset_marker (XWINDOW (w
)->pointm
,
2131 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2132 XWINDOW (w
)->buffer
);
2133 w
= Fnext_window (w
, Qt
, Qt
);
2137 if (current_buffer
->text
->intervals
)
2138 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2139 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2140 if (other_buffer
->text
->intervals
)
2141 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2142 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2147 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2149 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2150 If FLAG is t, this makes the buffer a multibyte buffer.
2151 If FLAG is nil, this makes the buffer a single-byte buffer.
2152 In these cases, the buffer contents remain unchanged as a sequence of
2153 bytes but the contents viewed as characters do change.
2154 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2155 all eight-bit bytes to eight-bit characters.
2156 If the multibyte flag was really changed, undo information of the
2157 current buffer is cleared. */)
2160 struct Lisp_Marker
*tail
, *markers
;
2161 struct buffer
*other
;
2163 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2164 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2165 Lisp_Object old_undo
= BVAR (current_buffer
, undo_list
);
2166 struct gcpro gcpro1
;
2168 if (current_buffer
->base_buffer
)
2169 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2171 /* Do nothing if nothing actually changes. */
2172 if (NILP (flag
) == NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2177 /* Don't record these buffer changes. We will put a special undo entry
2179 BVAR (current_buffer
, undo_list
) = Qt
;
2181 /* If the cached position is for this buffer, clear it out. */
2182 clear_charpos_cache (current_buffer
);
2185 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2187 begv
= BEGV
, zv
= ZV
;
2194 EMACS_INT pos
, stop
;
2197 /* Do this first, so it can use CHAR_TO_BYTE
2198 to calculate the old correspondences. */
2199 set_intervals_multibyte (0);
2201 BVAR (current_buffer
, enable_multibyte_characters
) = Qnil
;
2207 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2210 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2211 tail
->charpos
= tail
->bytepos
;
2213 /* Convert multibyte form of 8-bit characters to unibyte. */
2228 if (ASCII_BYTE_P (*p
))
2230 else if (CHAR_BYTE8_HEAD_P (*p
))
2232 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2233 /* Delete all bytes for this 8-bit character but the
2234 last one, and change the last one to the character
2237 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2249 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2250 p
+= bytes
, pos
+= bytes
;
2254 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2259 EMACS_INT pos
, stop
;
2260 unsigned char *p
, *pend
;
2262 /* Be sure not to have a multibyte sequence striding over the GAP.
2263 Ex: We change this: "...abc\302 _GAP_ \241def..."
2264 to: "...abc _GAP_ \302\241def..." */
2267 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2268 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2270 unsigned char *q
= GPT_ADDR
- 1;
2272 while (! CHAR_HEAD_P (*q
) && q
> BEG_ADDR
) q
--;
2273 if (LEADING_CODE_P (*q
))
2275 EMACS_INT new_gpt
= GPT_BYTE
- (GPT_ADDR
- q
);
2277 move_gap_both (new_gpt
, new_gpt
);
2281 /* Make the buffer contents valid as multibyte by converting
2282 8-bit characters to multibyte form. */
2300 if (ASCII_BYTE_P (*p
))
2302 else if (EQ (flag
, Qt
)
2303 && ! CHAR_BYTE8_HEAD_P (*p
)
2304 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2305 p
+= bytes
, pos
+= bytes
;
2308 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2311 c
= BYTE8_TO_CHAR (*p
);
2312 bytes
= CHAR_STRING (c
, tmp
);
2314 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2316 insert_1_both ((char *) tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2317 /* Now the gap is after the just inserted data. */
2335 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2337 /* Do this first, so that chars_in_text asks the right question.
2338 set_intervals_multibyte needs it too. */
2339 BVAR (current_buffer
, enable_multibyte_characters
) = Qt
;
2341 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2342 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2344 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2346 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2347 if (BEGV_BYTE
> GPT_BYTE
)
2348 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2350 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2352 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2353 if (ZV_BYTE
> GPT_BYTE
)
2354 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2356 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2359 EMACS_INT byte
= advance_to_char_boundary (PT_BYTE
);
2362 if (byte
> GPT_BYTE
)
2363 position
= chars_in_text (GAP_END_ADDR
, byte
- GPT_BYTE
) + GPT
;
2365 position
= chars_in_text (BEG_ADDR
, byte
- BEG_BYTE
) + BEG
;
2366 TEMP_SET_PT_BOTH (position
, byte
);
2369 tail
= markers
= BUF_MARKERS (current_buffer
);
2371 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2372 getting confused by the markers that have not yet been updated.
2373 It is also a signal that it should never create a marker. */
2374 BUF_MARKERS (current_buffer
) = NULL
;
2376 for (; tail
; tail
= tail
->next
)
2378 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2379 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2382 /* Make sure no markers were put on the chain
2383 while the chain value was incorrect. */
2384 if (BUF_MARKERS (current_buffer
))
2387 BUF_MARKERS (current_buffer
) = markers
;
2389 /* Do this last, so it can calculate the new correspondences
2390 between chars and bytes. */
2391 set_intervals_multibyte (1);
2394 if (!EQ (old_undo
, Qt
))
2396 /* Represent all the above changes by a special undo entry. */
2397 BVAR (current_buffer
, undo_list
) = Fcons (list3 (Qapply
,
2398 intern ("set-buffer-multibyte"),
2399 NILP (flag
) ? Qt
: Qnil
),
2405 /* Changing the multibyteness of a buffer means that all windows
2406 showing that buffer must be updated thoroughly. */
2407 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2408 ++windows_or_buffers_changed
;
2410 /* Copy this buffer's new multibyte status
2411 into all of its indirect buffers. */
2412 for (other
= all_buffers
; other
; other
= other
->header
.next
.buffer
)
2413 if (other
->base_buffer
== current_buffer
&& !NILP (BVAR (other
, name
)))
2415 BVAR (other
, enable_multibyte_characters
)
2416 = BVAR (current_buffer
, enable_multibyte_characters
);
2417 other
->prevent_redisplay_optimizations_p
= 1;
2420 /* Restore the modifiedness of the buffer. */
2421 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2422 Fset_buffer_modified_p (Qnil
);
2424 /* Update coding systems of this buffer's process (if any). */
2426 Lisp_Object process
;
2428 process
= Fget_buffer_process (Fcurrent_buffer ());
2429 if (PROCESSP (process
))
2430 setup_process_coding_systems (process
);
2436 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
,
2437 Skill_all_local_variables
, 0, 0, 0,
2438 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2439 Most local variable bindings are eliminated so that the default values
2440 become effective once more. Also, the syntax table is set from
2441 `standard-syntax-table', the local keymap is set to nil,
2442 and the abbrev table from `fundamental-mode-abbrev-table'.
2443 This function also forces redisplay of the mode line.
2445 Every function to select a new major mode starts by
2446 calling this function.
2448 As a special exception, local variables whose names have
2449 a non-nil `permanent-local' property are not eliminated by this function.
2451 The first thing this function does is run
2452 the normal hook `change-major-mode-hook'. */)
2455 Frun_hooks (1, &Qchange_major_mode_hook
);
2457 /* Make sure none of the bindings in local_var_alist
2458 remain swapped in, in their symbols. */
2460 swap_out_buffer_local_variables (current_buffer
);
2462 /* Actually eliminate all local bindings of this buffer. */
2464 reset_buffer_local_variables (current_buffer
, 0);
2466 /* Force mode-line redisplay. Useful here because all major mode
2467 commands call this function. */
2468 update_mode_lines
++;
2473 /* Make sure no local variables remain set up with buffer B
2474 for their current values. */
2477 swap_out_buffer_local_variables (struct buffer
*b
)
2479 Lisp_Object oalist
, alist
, buffer
;
2481 XSETBUFFER (buffer
, b
);
2482 oalist
= BVAR (b
, local_var_alist
);
2484 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2486 Lisp_Object sym
= XCAR (XCAR (alist
));
2487 eassert (XSYMBOL (sym
)->redirect
== SYMBOL_LOCALIZED
);
2488 /* Need not do anything if some other buffer's binding is
2490 if (EQ (SYMBOL_BLV (XSYMBOL (sym
))->where
, buffer
))
2492 /* Symbol is set up for this buffer's old local value:
2494 swap_in_global_binding (XSYMBOL (sym
));
2499 /* Find all the overlays in the current buffer that contain position POS.
2500 Return the number found, and store them in a vector in *VEC_PTR.
2501 Store in *LEN_PTR the size allocated for the vector.
2502 Store in *NEXT_PTR the next position after POS where an overlay starts,
2503 or ZV if there are no more overlays between POS and ZV.
2504 Store in *PREV_PTR the previous position before POS where an overlay ends,
2505 or where an overlay starts which ends at or after POS;
2506 or BEGV if there are no such overlays from BEGV to POS.
2507 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2509 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2510 when this function is called.
2512 If EXTEND is non-zero, we make the vector bigger if necessary.
2513 If EXTEND is zero, we never extend the vector,
2514 and we store only as many overlays as will fit.
2515 But we still return the total number of overlays.
2517 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2518 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2519 default (BEGV or ZV). */
2522 overlays_at (EMACS_INT pos
, int extend
, Lisp_Object
**vec_ptr
, int *len_ptr
,
2523 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
, int change_req
)
2525 Lisp_Object overlay
, start
, end
;
2526 struct Lisp_Overlay
*tail
;
2529 Lisp_Object
*vec
= *vec_ptr
;
2530 EMACS_INT next
= ZV
;
2531 EMACS_INT prev
= BEGV
;
2532 int inhibit_storing
= 0;
2534 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2536 EMACS_INT startpos
, endpos
;
2538 XSETMISC (overlay
, tail
);
2540 start
= OVERLAY_START (overlay
);
2541 end
= OVERLAY_END (overlay
);
2542 endpos
= OVERLAY_POSITION (end
);
2549 startpos
= OVERLAY_POSITION (start
);
2550 /* This one ends at or after POS
2551 so its start counts for PREV_PTR if it's before POS. */
2552 if (prev
< startpos
&& startpos
< pos
)
2556 if (startpos
<= pos
)
2560 /* The supplied vector is full.
2561 Either make it bigger, or don't store any more in it. */
2564 /* Make it work with an initial len == 0. */
2569 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2573 inhibit_storing
= 1;
2576 if (!inhibit_storing
)
2578 /* Keep counting overlays even if we can't return them all. */
2581 else if (startpos
< next
)
2585 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2587 EMACS_INT startpos
, endpos
;
2589 XSETMISC (overlay
, tail
);
2591 start
= OVERLAY_START (overlay
);
2592 end
= OVERLAY_END (overlay
);
2593 startpos
= OVERLAY_POSITION (start
);
2596 if (startpos
< next
)
2600 endpos
= OVERLAY_POSITION (end
);
2607 /* Make it work with an initial len == 0. */
2612 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2616 inhibit_storing
= 1;
2619 if (!inhibit_storing
)
2623 if (startpos
< pos
&& startpos
> prev
)
2626 else if (endpos
< pos
&& endpos
> prev
)
2628 else if (endpos
== pos
&& startpos
> prev
2629 && (!change_req
|| startpos
< pos
))
2640 /* Find all the overlays in the current buffer that overlap the range
2641 BEG-END, or are empty at BEG, or are empty at END provided END
2642 denotes the position at the end of the current buffer.
2644 Return the number found, and store them in a vector in *VEC_PTR.
2645 Store in *LEN_PTR the size allocated for the vector.
2646 Store in *NEXT_PTR the next position after POS where an overlay starts,
2647 or ZV if there are no more overlays.
2648 Store in *PREV_PTR the previous position before POS where an overlay ends,
2649 or BEGV if there are no previous overlays.
2650 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2652 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2653 when this function is called.
2655 If EXTEND is non-zero, we make the vector bigger if necessary.
2656 If EXTEND is zero, we never extend the vector,
2657 and we store only as many overlays as will fit.
2658 But we still return the total number of overlays. */
2661 overlays_in (EMACS_INT beg
, EMACS_INT end
, int extend
,
2662 Lisp_Object
**vec_ptr
, int *len_ptr
,
2663 EMACS_INT
*next_ptr
, EMACS_INT
*prev_ptr
)
2665 Lisp_Object overlay
, ostart
, oend
;
2666 struct Lisp_Overlay
*tail
;
2669 Lisp_Object
*vec
= *vec_ptr
;
2670 EMACS_INT next
= ZV
;
2671 EMACS_INT prev
= BEGV
;
2672 int inhibit_storing
= 0;
2673 int end_is_Z
= end
== Z
;
2675 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2677 EMACS_INT startpos
, endpos
;
2679 XSETMISC (overlay
, tail
);
2681 ostart
= OVERLAY_START (overlay
);
2682 oend
= OVERLAY_END (overlay
);
2683 endpos
= OVERLAY_POSITION (oend
);
2690 startpos
= OVERLAY_POSITION (ostart
);
2691 /* Count an interval if it overlaps the range, is empty at the
2692 start of the range, or is empty at END provided END denotes the
2693 end of the buffer. */
2694 if ((beg
< endpos
&& startpos
< end
)
2695 || (startpos
== endpos
2696 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2700 /* The supplied vector is full.
2701 Either make it bigger, or don't store any more in it. */
2704 /* Make it work with an initial len == 0. */
2709 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2713 inhibit_storing
= 1;
2716 if (!inhibit_storing
)
2718 /* Keep counting overlays even if we can't return them all. */
2721 else if (startpos
< next
)
2725 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2727 EMACS_INT startpos
, endpos
;
2729 XSETMISC (overlay
, tail
);
2731 ostart
= OVERLAY_START (overlay
);
2732 oend
= OVERLAY_END (overlay
);
2733 startpos
= OVERLAY_POSITION (ostart
);
2736 if (startpos
< next
)
2740 endpos
= OVERLAY_POSITION (oend
);
2741 /* Count an interval if it overlaps the range, is empty at the
2742 start of the range, or is empty at END provided END denotes the
2743 end of the buffer. */
2744 if ((beg
< endpos
&& startpos
< end
)
2745 || (startpos
== endpos
2746 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2752 /* Make it work with an initial len == 0. */
2757 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2761 inhibit_storing
= 1;
2764 if (!inhibit_storing
)
2768 else if (endpos
< beg
&& endpos
> prev
)
2780 /* Return non-zero if there exists an overlay with a non-nil
2781 `mouse-face' property overlapping OVERLAY. */
2784 mouse_face_overlay_overlaps (Lisp_Object overlay
)
2786 EMACS_INT start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2787 EMACS_INT end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2789 Lisp_Object
*v
, tem
;
2792 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2793 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2796 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2797 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2800 for (i
= 0; i
< n
; ++i
)
2801 if (!EQ (v
[i
], overlay
)
2802 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2811 /* Fast function to just test if we're at an overlay boundary. */
2813 overlay_touches_p (EMACS_INT pos
)
2815 Lisp_Object overlay
;
2816 struct Lisp_Overlay
*tail
;
2818 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2822 XSETMISC (overlay
,tail
);
2823 if (!OVERLAYP (overlay
))
2826 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2829 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2833 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2837 XSETMISC (overlay
, tail
);
2838 if (!OVERLAYP (overlay
))
2841 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2844 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2852 Lisp_Object overlay
;
2858 compare_overlays (const void *v1
, const void *v2
)
2860 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2861 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2862 if (s1
->priority
!= s2
->priority
)
2863 return s1
->priority
< s2
->priority
? -1 : 1;
2864 if (s1
->beg
!= s2
->beg
)
2865 return s1
->beg
< s2
->beg
? -1 : 1;
2866 if (s1
->end
!= s2
->end
)
2867 return s2
->end
< s1
->end
? -1 : 1;
2871 /* Sort an array of overlays by priority. The array is modified in place.
2872 The return value is the new size; this may be smaller than the original
2873 size if some of the overlays were invalid or were window-specific. */
2875 sort_overlays (Lisp_Object
*overlay_vec
, int noverlays
, struct window
*w
)
2878 struct sortvec
*sortvec
;
2879 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2881 /* Put the valid and relevant overlays into sortvec. */
2883 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2886 Lisp_Object overlay
;
2888 overlay
= overlay_vec
[i
];
2889 if (OVERLAY_VALID (overlay
)
2890 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2891 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2893 /* If we're interested in a specific window, then ignore
2894 overlays that are limited to some other window. */
2899 window
= Foverlay_get (overlay
, Qwindow
);
2900 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2904 /* This overlay is good and counts: put it into sortvec. */
2905 sortvec
[j
].overlay
= overlay
;
2906 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2907 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2908 tem
= Foverlay_get (overlay
, Qpriority
);
2910 sortvec
[j
].priority
= XINT (tem
);
2912 sortvec
[j
].priority
= 0;
2918 /* Sort the overlays into the proper order: increasing priority. */
2921 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2923 for (i
= 0; i
< noverlays
; i
++)
2924 overlay_vec
[i
] = sortvec
[i
].overlay
;
2930 Lisp_Object string
, string2
;
2937 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2938 ptrdiff_t size
; /* Allocated length of that array. */
2939 ptrdiff_t used
; /* How much of the array is currently in use. */
2940 EMACS_INT bytes
; /* Total length of the strings in buf. */
2943 /* Buffers for storing information about the overlays touching a given
2944 position. These could be automatic variables in overlay_strings, but
2945 it's more efficient to hold onto the memory instead of repeatedly
2946 allocating and freeing it. */
2947 static struct sortstrlist overlay_heads
, overlay_tails
;
2948 static unsigned char *overlay_str_buf
;
2950 /* Allocated length of overlay_str_buf. */
2951 static EMACS_INT overlay_str_len
;
2953 /* A comparison function suitable for passing to qsort. */
2955 cmp_for_strings (const void *as1
, const void *as2
)
2957 struct sortstr
*s1
= (struct sortstr
*)as1
;
2958 struct sortstr
*s2
= (struct sortstr
*)as2
;
2959 if (s1
->size
!= s2
->size
)
2960 return s2
->size
< s1
->size
? -1 : 1;
2961 if (s1
->priority
!= s2
->priority
)
2962 return s1
->priority
< s2
->priority
? -1 : 1;
2967 record_overlay_string (struct sortstrlist
*ssl
, Lisp_Object str
,
2968 Lisp_Object str2
, Lisp_Object pri
, ptrdiff_t size
)
2972 if (ssl
->used
== ssl
->size
)
2974 if (min (PTRDIFF_MAX
, SIZE_MAX
) / (sizeof (struct sortstr
) * 2)
2976 memory_full (SIZE_MAX
);
2977 else if (0 < ssl
->size
)
2981 ssl
->buf
= ((struct sortstr
*)
2982 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2984 ssl
->buf
[ssl
->used
].string
= str
;
2985 ssl
->buf
[ssl
->used
].string2
= str2
;
2986 ssl
->buf
[ssl
->used
].size
= size
;
2987 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2990 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2991 nbytes
= SCHARS (str
);
2992 else if (! STRING_MULTIBYTE (str
))
2993 nbytes
= count_size_as_multibyte (SDATA (str
),
2996 nbytes
= SBYTES (str
);
2998 ssl
->bytes
+= nbytes
;
3002 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3003 nbytes
= SCHARS (str2
);
3004 else if (! STRING_MULTIBYTE (str2
))
3005 nbytes
= count_size_as_multibyte (SDATA (str2
),
3008 nbytes
= SBYTES (str2
);
3010 ssl
->bytes
+= nbytes
;
3014 /* Return the concatenation of the strings associated with overlays that
3015 begin or end at POS, ignoring overlays that are specific to a window
3016 other than W. The strings are concatenated in the appropriate order:
3017 shorter overlays nest inside longer ones, and higher priority inside
3018 lower. Normally all of the after-strings come first, but zero-sized
3019 overlays have their after-strings ride along with the before-strings
3020 because it would look strange to print them inside-out.
3022 Returns the string length, and stores the contents indirectly through
3023 PSTR, if that variable is non-null. The string may be overwritten by
3024 subsequent calls. */
3027 overlay_strings (EMACS_INT pos
, struct window
*w
, unsigned char **pstr
)
3029 Lisp_Object overlay
, window
, str
;
3030 struct Lisp_Overlay
*ov
;
3031 EMACS_INT startpos
, endpos
;
3032 int multibyte
= ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3034 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3035 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3036 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3038 XSETMISC (overlay
, ov
);
3039 eassert (OVERLAYP (overlay
));
3041 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3042 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3045 if (endpos
!= pos
&& startpos
!= pos
)
3047 window
= Foverlay_get (overlay
, Qwindow
);
3048 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3051 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3052 record_overlay_string (&overlay_heads
, str
,
3054 ? Foverlay_get (overlay
, Qafter_string
)
3056 Foverlay_get (overlay
, Qpriority
),
3058 else if (endpos
== pos
3059 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3060 record_overlay_string (&overlay_tails
, str
, Qnil
,
3061 Foverlay_get (overlay
, Qpriority
),
3064 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3066 XSETMISC (overlay
, ov
);
3067 eassert (OVERLAYP (overlay
));
3069 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3070 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3073 if (endpos
!= pos
&& startpos
!= pos
)
3075 window
= Foverlay_get (overlay
, Qwindow
);
3076 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3079 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3080 record_overlay_string (&overlay_heads
, str
,
3082 ? Foverlay_get (overlay
, Qafter_string
)
3084 Foverlay_get (overlay
, Qpriority
),
3086 else if (endpos
== pos
3087 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3088 record_overlay_string (&overlay_tails
, str
, Qnil
,
3089 Foverlay_get (overlay
, Qpriority
),
3092 if (overlay_tails
.used
> 1)
3093 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3095 if (overlay_heads
.used
> 1)
3096 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3098 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3103 EMACS_INT total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3105 if (total
> overlay_str_len
)
3107 overlay_str_len
= total
;
3108 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3111 p
= overlay_str_buf
;
3112 for (i
= overlay_tails
.used
; --i
>= 0;)
3115 tem
= overlay_tails
.buf
[i
].string
;
3116 nbytes
= copy_text (SDATA (tem
), p
,
3118 STRING_MULTIBYTE (tem
), multibyte
);
3121 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3124 tem
= overlay_heads
.buf
[i
].string
;
3125 nbytes
= copy_text (SDATA (tem
), p
,
3127 STRING_MULTIBYTE (tem
), multibyte
);
3129 tem
= overlay_heads
.buf
[i
].string2
;
3132 nbytes
= copy_text (SDATA (tem
), p
,
3134 STRING_MULTIBYTE (tem
), multibyte
);
3138 if (p
!= overlay_str_buf
+ total
)
3141 *pstr
= overlay_str_buf
;
3147 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3150 recenter_overlay_lists (struct buffer
*buf
, EMACS_INT pos
)
3152 Lisp_Object overlay
, beg
, end
;
3153 struct Lisp_Overlay
*prev
, *tail
, *next
;
3155 /* See if anything in overlays_before should move to overlays_after. */
3157 /* We don't strictly need prev in this loop; it should always be nil.
3158 But we use it for symmetry and in case that should cease to be true
3159 with some future change. */
3161 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3164 XSETMISC (overlay
, tail
);
3166 /* If the overlay is not valid, get rid of it. */
3167 if (!OVERLAY_VALID (overlay
))
3172 /* Splice the cons cell TAIL out of overlays_before. */
3176 buf
->overlays_before
= next
;
3182 beg
= OVERLAY_START (overlay
);
3183 end
= OVERLAY_END (overlay
);
3185 if (OVERLAY_POSITION (end
) > pos
)
3187 /* OVERLAY needs to be moved. */
3188 EMACS_INT where
= OVERLAY_POSITION (beg
);
3189 struct Lisp_Overlay
*other
, *other_prev
;
3191 /* Splice the cons cell TAIL out of overlays_before. */
3195 buf
->overlays_before
= next
;
3197 /* Search thru overlays_after for where to put it. */
3199 for (other
= buf
->overlays_after
; other
;
3200 other_prev
= other
, other
= other
->next
)
3202 Lisp_Object otherbeg
, otheroverlay
;
3204 XSETMISC (otheroverlay
, other
);
3205 eassert (OVERLAY_VALID (otheroverlay
));
3207 otherbeg
= OVERLAY_START (otheroverlay
);
3208 if (OVERLAY_POSITION (otherbeg
) >= where
)
3212 /* Add TAIL to overlays_after before OTHER. */
3215 other_prev
->next
= tail
;
3217 buf
->overlays_after
= tail
;
3221 /* We've reached the things that should stay in overlays_before.
3222 All the rest of overlays_before must end even earlier,
3227 /* See if anything in overlays_after should be in overlays_before. */
3229 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3232 XSETMISC (overlay
, tail
);
3234 /* If the overlay is not valid, get rid of it. */
3235 if (!OVERLAY_VALID (overlay
))
3240 /* Splice the cons cell TAIL out of overlays_after. */
3244 buf
->overlays_after
= next
;
3250 beg
= OVERLAY_START (overlay
);
3251 end
= OVERLAY_END (overlay
);
3253 /* Stop looking, when we know that nothing further
3254 can possibly end before POS. */
3255 if (OVERLAY_POSITION (beg
) > pos
)
3258 if (OVERLAY_POSITION (end
) <= pos
)
3260 /* OVERLAY needs to be moved. */
3261 EMACS_INT where
= OVERLAY_POSITION (end
);
3262 struct Lisp_Overlay
*other
, *other_prev
;
3264 /* Splice the cons cell TAIL out of overlays_after. */
3268 buf
->overlays_after
= next
;
3270 /* Search thru overlays_before for where to put it. */
3272 for (other
= buf
->overlays_before
; other
;
3273 other_prev
= other
, other
= other
->next
)
3275 Lisp_Object otherend
, otheroverlay
;
3277 XSETMISC (otheroverlay
, other
);
3278 eassert (OVERLAY_VALID (otheroverlay
));
3280 otherend
= OVERLAY_END (otheroverlay
);
3281 if (OVERLAY_POSITION (otherend
) <= where
)
3285 /* Add TAIL to overlays_before before OTHER. */
3288 other_prev
->next
= tail
;
3290 buf
->overlays_before
= tail
;
3295 buf
->overlay_center
= pos
;
3299 adjust_overlays_for_insert (EMACS_INT pos
, EMACS_INT length
)
3301 /* After an insertion, the lists are still sorted properly,
3302 but we may need to update the value of the overlay center. */
3303 if (current_buffer
->overlay_center
>= pos
)
3304 current_buffer
->overlay_center
+= length
;
3308 adjust_overlays_for_delete (EMACS_INT pos
, EMACS_INT length
)
3310 if (current_buffer
->overlay_center
< pos
)
3311 /* The deletion was to our right. No change needed; the before- and
3312 after-lists are still consistent. */
3314 else if (current_buffer
->overlay_center
> pos
+ length
)
3315 /* The deletion was to our left. We need to adjust the center value
3316 to account for the change in position, but the lists are consistent
3317 given the new value. */
3318 current_buffer
->overlay_center
-= length
;
3320 /* We're right in the middle. There might be things on the after-list
3321 that now belong on the before-list. Recentering will move them,
3322 and also update the center point. */
3323 recenter_overlay_lists (current_buffer
, pos
);
3326 /* Fix up overlays that were garbled as a result of permuting markers
3327 in the range START through END. Any overlay with at least one
3328 endpoint in this range will need to be unlinked from the overlay
3329 list and reinserted in its proper place.
3330 Such an overlay might even have negative size at this point.
3331 If so, we'll make the overlay empty. */
3333 fix_start_end_in_overlays (register EMACS_INT start
, register EMACS_INT end
)
3335 Lisp_Object overlay
;
3336 struct Lisp_Overlay
*before_list
IF_LINT (= NULL
);
3337 struct Lisp_Overlay
*after_list
IF_LINT (= NULL
);
3338 /* These are either nil, indicating that before_list or after_list
3339 should be assigned, or the cons cell the cdr of which should be
3341 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3342 /* 'Parent', likewise, indicates a cons cell or
3343 current_buffer->overlays_before or overlays_after, depending
3344 which loop we're in. */
3345 struct Lisp_Overlay
*tail
, *parent
;
3346 EMACS_INT startpos
, endpos
;
3348 /* This algorithm shifts links around instead of consing and GCing.
3349 The loop invariant is that before_list (resp. after_list) is a
3350 well-formed list except that its last element, the CDR of beforep
3351 (resp. afterp) if beforep (afterp) isn't nil or before_list
3352 (after_list) if it is, is still uninitialized. So it's not a bug
3353 that before_list isn't initialized, although it may look
3355 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3357 XSETMISC (overlay
, tail
);
3359 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3360 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3362 /* If the overlay is backwards, make it empty. */
3363 if (endpos
< startpos
)
3366 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3374 || (startpos
>= start
&& startpos
< end
))
3376 /* Add it to the end of the wrong list. Later on,
3377 recenter_overlay_lists will move it to the right place. */
3378 if (endpos
< current_buffer
->overlay_center
)
3383 afterp
->next
= tail
;
3391 beforep
->next
= tail
;
3395 current_buffer
->overlays_before
= tail
->next
;
3397 parent
->next
= tail
->next
;
3401 parent
= tail
, tail
= parent
->next
;
3403 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3405 XSETMISC (overlay
, tail
);
3407 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3408 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3410 /* If the overlay is backwards, make it empty. */
3411 if (endpos
< startpos
)
3414 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3418 if (startpos
>= end
)
3421 if (startpos
>= start
3422 || (endpos
>= start
&& endpos
< end
))
3424 if (endpos
< current_buffer
->overlay_center
)
3429 afterp
->next
= tail
;
3437 beforep
->next
= tail
;
3441 current_buffer
->overlays_after
= tail
->next
;
3443 parent
->next
= tail
->next
;
3447 parent
= tail
, tail
= parent
->next
;
3450 /* Splice the constructed (wrong) lists into the buffer's lists,
3451 and let the recenter function make it sane again. */
3454 beforep
->next
= current_buffer
->overlays_before
;
3455 current_buffer
->overlays_before
= before_list
;
3457 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3461 afterp
->next
= current_buffer
->overlays_after
;
3462 current_buffer
->overlays_after
= after_list
;
3464 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3467 /* We have two types of overlay: the one whose ending marker is
3468 after-insertion-marker (this is the usual case) and the one whose
3469 ending marker is before-insertion-marker. When `overlays_before'
3470 contains overlays of the latter type and the former type in this
3471 order and both overlays end at inserting position, inserting a text
3472 increases only the ending marker of the latter type, which results
3473 in incorrect ordering of `overlays_before'.
3475 This function fixes ordering of overlays in the slot
3476 `overlays_before' of the buffer *BP. Before the insertion, `point'
3477 was at PREV, and now is at POS. */
3480 fix_overlays_before (struct buffer
*bp
, EMACS_INT prev
, EMACS_INT pos
)
3482 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3483 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3485 EMACS_INT end
IF_LINT (= 0);
3487 /* After the insertion, the several overlays may be in incorrect
3488 order. The possibility is that, in the list `overlays_before',
3489 an overlay which ends at POS appears after an overlay which ends
3490 at PREV. Since POS is greater than PREV, we must fix the
3491 ordering of these overlays, by moving overlays ends at POS before
3492 the overlays ends at PREV. */
3494 /* At first, find a place where disordered overlays should be linked
3495 in. It is where an overlay which end before POS exists. (i.e. an
3496 overlay whose ending marker is after-insertion-marker if disorder
3499 && (XSETMISC (tem
, tail
),
3500 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3506 /* If we don't find such an overlay,
3507 or the found one ends before PREV,
3508 or the found one is the last one in the list,
3509 we don't have to fix anything. */
3510 if (!tail
|| end
< prev
|| !tail
->next
)
3513 right_pair
= parent
;
3517 /* Now, end position of overlays in the list TAIL should be before
3518 or equal to PREV. In the loop, an overlay which ends at POS is
3519 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3520 we found an overlay which ends before PREV, the remaining
3521 overlays are in correct order. */
3524 XSETMISC (tem
, tail
);
3525 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3528 { /* This overlay is disordered. */
3529 struct Lisp_Overlay
*found
= tail
;
3531 /* Unlink the found overlay. */
3533 parent
->next
= tail
;
3534 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3535 and link it into the right place. */
3538 found
->next
= bp
->overlays_before
;
3539 bp
->overlays_before
= found
;
3543 found
->next
= right_pair
->next
;
3544 right_pair
->next
= found
;
3547 else if (end
== prev
)
3552 else /* No more disordered overlay. */
3557 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3558 doc
: /* Return t if OBJECT is an overlay. */)
3559 (Lisp_Object object
)
3561 return (OVERLAYP (object
) ? Qt
: Qnil
);
3564 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3565 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3566 If omitted, BUFFER defaults to the current buffer.
3567 BEG and END may be integers or markers.
3568 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3569 for the front of the overlay advance when text is inserted there
3570 \(which means the text *is not* included in the overlay).
3571 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3572 for the rear of the overlay advance when text is inserted there
3573 \(which means the text *is* included in the overlay). */)
3574 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
, Lisp_Object front_advance
, Lisp_Object rear_advance
)
3576 Lisp_Object overlay
;
3580 XSETBUFFER (buffer
, current_buffer
);
3582 CHECK_BUFFER (buffer
);
3584 && ! EQ (Fmarker_buffer (beg
), buffer
))
3585 error ("Marker points into wrong buffer");
3587 && ! EQ (Fmarker_buffer (end
), buffer
))
3588 error ("Marker points into wrong buffer");
3590 CHECK_NUMBER_COERCE_MARKER (beg
);
3591 CHECK_NUMBER_COERCE_MARKER (end
);
3593 if (XINT (beg
) > XINT (end
))
3596 temp
= beg
; beg
= end
; end
= temp
;
3599 b
= XBUFFER (buffer
);
3601 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3602 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3604 if (!NILP (front_advance
))
3605 XMARKER (beg
)->insertion_type
= 1;
3606 if (!NILP (rear_advance
))
3607 XMARKER (end
)->insertion_type
= 1;
3609 overlay
= allocate_misc ();
3610 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3611 XOVERLAY (overlay
)->start
= beg
;
3612 XOVERLAY (overlay
)->end
= end
;
3613 XOVERLAY (overlay
)->plist
= Qnil
;
3614 XOVERLAY (overlay
)->next
= NULL
;
3616 /* Put the new overlay on the wrong list. */
3617 end
= OVERLAY_END (overlay
);
3618 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3620 if (b
->overlays_after
)
3621 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3622 b
->overlays_after
= XOVERLAY (overlay
);
3626 if (b
->overlays_before
)
3627 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3628 b
->overlays_before
= XOVERLAY (overlay
);
3631 /* This puts it in the right list, and in the right order. */
3632 recenter_overlay_lists (b
, b
->overlay_center
);
3634 /* We don't need to redisplay the region covered by the overlay, because
3635 the overlay has no properties at the moment. */
3640 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3643 modify_overlay (struct buffer
*buf
, EMACS_INT start
, EMACS_INT end
)
3647 EMACS_INT temp
= start
;
3652 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3654 /* If this is a buffer not in the selected window,
3655 we must do other windows. */
3656 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3657 windows_or_buffers_changed
= 1;
3658 /* If multiple windows show this buffer, we must do other windows. */
3659 else if (buffer_shared
> 1)
3660 windows_or_buffers_changed
= 1;
3661 /* If we modify an overlay at the end of the buffer, we cannot
3662 be sure that window end is still valid. */
3663 else if (end
>= ZV
&& start
<= ZV
)
3664 windows_or_buffers_changed
= 1;
3666 ++BUF_OVERLAY_MODIFF (buf
);
3670 static struct Lisp_Overlay
*
3671 unchain_overlay (struct Lisp_Overlay
*list
, struct Lisp_Overlay
*overlay
)
3673 struct Lisp_Overlay
*tmp
, *prev
;
3674 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3678 prev
->next
= tmp
->next
;
3681 overlay
->next
= NULL
;
3687 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3688 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3689 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3690 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3692 (Lisp_Object overlay
, Lisp_Object beg
, Lisp_Object end
, Lisp_Object buffer
)
3694 struct buffer
*b
, *ob
;
3695 Lisp_Object obuffer
;
3696 int count
= SPECPDL_INDEX ();
3698 CHECK_OVERLAY (overlay
);
3700 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3702 XSETBUFFER (buffer
, current_buffer
);
3703 CHECK_BUFFER (buffer
);
3706 && ! EQ (Fmarker_buffer (beg
), buffer
))
3707 error ("Marker points into wrong buffer");
3709 && ! EQ (Fmarker_buffer (end
), buffer
))
3710 error ("Marker points into wrong buffer");
3712 CHECK_NUMBER_COERCE_MARKER (beg
);
3713 CHECK_NUMBER_COERCE_MARKER (end
);
3715 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3716 return Fdelete_overlay (overlay
);
3718 if (XINT (beg
) > XINT (end
))
3721 temp
= beg
; beg
= end
; end
= temp
;
3724 specbind (Qinhibit_quit
, Qt
);
3726 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3727 b
= XBUFFER (buffer
);
3728 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3730 /* If the overlay has changed buffers, do a thorough redisplay. */
3731 if (!EQ (buffer
, obuffer
))
3733 /* Redisplay where the overlay was. */
3734 if (!NILP (obuffer
))
3739 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3740 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3742 modify_overlay (ob
, o_beg
, o_end
);
3745 /* Redisplay where the overlay is going to be. */
3746 modify_overlay (b
, XINT (beg
), XINT (end
));
3749 /* Redisplay the area the overlay has just left, or just enclosed. */
3751 EMACS_INT o_beg
, o_end
;
3753 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3754 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3756 if (o_beg
== XINT (beg
))
3757 modify_overlay (b
, o_end
, XINT (end
));
3758 else if (o_end
== XINT (end
))
3759 modify_overlay (b
, o_beg
, XINT (beg
));
3762 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3763 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3764 modify_overlay (b
, o_beg
, o_end
);
3768 if (!NILP (obuffer
))
3771 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3773 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3774 eassert (XOVERLAY (overlay
)->next
== NULL
);
3777 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3778 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3780 /* Put the overlay on the wrong list. */
3781 end
= OVERLAY_END (overlay
);
3782 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3784 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3785 b
->overlays_after
= XOVERLAY (overlay
);
3789 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3790 b
->overlays_before
= XOVERLAY (overlay
);
3793 /* This puts it in the right list, and in the right order. */
3794 recenter_overlay_lists (b
, b
->overlay_center
);
3796 return unbind_to (count
, overlay
);
3799 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3800 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3801 (Lisp_Object overlay
)
3805 int count
= SPECPDL_INDEX ();
3807 CHECK_OVERLAY (overlay
);
3809 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3813 b
= XBUFFER (buffer
);
3814 specbind (Qinhibit_quit
, Qt
);
3816 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3817 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3818 eassert (XOVERLAY (overlay
)->next
== NULL
);
3820 marker_position (OVERLAY_START (overlay
)),
3821 marker_position (OVERLAY_END (overlay
)));
3822 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3823 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3825 /* When deleting an overlay with before or after strings, turn off
3826 display optimizations for the affected buffer, on the basis that
3827 these strings may contain newlines. This is easier to do than to
3828 check for that situation during redisplay. */
3829 if (!windows_or_buffers_changed
3830 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3831 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3832 b
->prevent_redisplay_optimizations_p
= 1;
3834 return unbind_to (count
, Qnil
);
3837 /* Overlay dissection functions. */
3839 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3840 doc
: /* Return the position at which OVERLAY starts. */)
3841 (Lisp_Object overlay
)
3843 CHECK_OVERLAY (overlay
);
3845 return (Fmarker_position (OVERLAY_START (overlay
)));
3848 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3849 doc
: /* Return the position at which OVERLAY ends. */)
3850 (Lisp_Object overlay
)
3852 CHECK_OVERLAY (overlay
);
3854 return (Fmarker_position (OVERLAY_END (overlay
)));
3857 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3858 doc
: /* Return the buffer OVERLAY belongs to.
3859 Return nil if OVERLAY has been deleted. */)
3860 (Lisp_Object overlay
)
3862 CHECK_OVERLAY (overlay
);
3864 return Fmarker_buffer (OVERLAY_START (overlay
));
3867 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3868 doc
: /* Return a list of the properties on OVERLAY.
3869 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3871 (Lisp_Object overlay
)
3873 CHECK_OVERLAY (overlay
);
3875 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3879 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3880 doc
: /* Return a list of the overlays that contain the character at POS. */)
3884 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
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
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
,
3897 (EMACS_INT
*) 0, (EMACS_INT
*) 0, 0);
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
)
3916 Lisp_Object
*overlay_vec
;
3920 CHECK_NUMBER_COERCE_MARKER (beg
);
3921 CHECK_NUMBER_COERCE_MARKER (end
);
3924 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3926 /* Put all the overlays we want in a vector in overlay_vec.
3927 Store the length in len. */
3928 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3931 /* Make a list of them all. */
3932 result
= Flist (noverlays
, overlay_vec
);
3934 xfree (overlay_vec
);
3938 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3940 doc
: /* Return the next position after POS where an overlay starts or ends.
3941 If there are no overlay boundaries from POS to (point-max),
3942 the value is (point-max). */)
3947 Lisp_Object
*overlay_vec
;
3951 CHECK_NUMBER_COERCE_MARKER (pos
);
3954 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3956 /* Put all the overlays we want in a vector in overlay_vec.
3957 Store the length in len.
3958 endpos gets the position where the next overlay starts. */
3959 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3960 &endpos
, (EMACS_INT
*) 0, 1);
3962 /* If any of these overlays ends before endpos,
3963 use its ending point instead. */
3964 for (i
= 0; i
< noverlays
; i
++)
3969 oend
= OVERLAY_END (overlay_vec
[i
]);
3970 oendpos
= OVERLAY_POSITION (oend
);
3971 if (oendpos
< endpos
)
3975 xfree (overlay_vec
);
3976 return make_number (endpos
);
3979 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3980 Sprevious_overlay_change
, 1, 1, 0,
3981 doc
: /* Return the previous position before POS where an overlay starts or ends.
3982 If there are no overlay boundaries from (point-min) to POS,
3983 the value is (point-min). */)
3987 Lisp_Object
*overlay_vec
;
3990 CHECK_NUMBER_COERCE_MARKER (pos
);
3992 /* At beginning of buffer, we know the answer;
3993 avoid bug subtracting 1 below. */
3994 if (XINT (pos
) == BEGV
)
3998 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4000 /* Put all the overlays we want in a vector in overlay_vec.
4001 Store the length in len.
4002 prevpos gets the position of the previous change. */
4003 overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4004 (EMACS_INT
*) 0, &prevpos
, 1);
4006 xfree (overlay_vec
);
4007 return make_number (prevpos
);
4010 /* These functions are for debugging overlays. */
4012 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4013 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4014 The car has all the overlays before the overlay center;
4015 the cdr has all the overlays after the overlay center.
4016 Recentering overlays moves overlays between these lists.
4017 The lists you get are copies, so that changing them has no effect.
4018 However, the overlays you get are the real objects that the buffer uses. */)
4021 struct Lisp_Overlay
*ol
;
4022 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4023 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4026 before
= Fcons (tmp
, before
);
4028 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4031 after
= Fcons (tmp
, after
);
4033 return Fcons (Fnreverse (before
), Fnreverse (after
));
4036 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4037 doc
: /* Recenter the overlays of the current buffer around position POS.
4038 That makes overlay lookup faster for positions near POS (but perhaps slower
4039 for positions far away from POS). */)
4042 CHECK_NUMBER_COERCE_MARKER (pos
);
4044 recenter_overlay_lists (current_buffer
, XINT (pos
));
4048 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4049 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4050 (Lisp_Object overlay
, Lisp_Object prop
)
4052 CHECK_OVERLAY (overlay
);
4053 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4056 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4057 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
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 int 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 int oldsize
= ASIZE (last_overlay_modification_hooks
);
4120 if (last_overlay_modification_hooks_used
== oldsize
)
4121 last_overlay_modification_hooks
= larger_vector
4122 (last_overlay_modification_hooks
, oldsize
* 2, Qnil
);
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 EMACS_INT 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 EMACS_INT 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 int size
= last_overlay_modification_hooks_used
;
4250 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
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 (EMACS_INT 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 intialized. */
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 ((POINTER_TYPE *) ((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 conservativly 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 /* Function prototypes. */
4468 static int mmap_free_1 (struct mmap_region
*);
4469 static int mmap_enlarge (struct mmap_region
*, int);
4470 static struct mmap_region
*mmap_find (POINTER_TYPE
*, POINTER_TYPE
*);
4471 static POINTER_TYPE
*mmap_alloc (POINTER_TYPE
**, size_t);
4472 static POINTER_TYPE
*mmap_realloc (POINTER_TYPE
**, size_t);
4473 static void mmap_free (POINTER_TYPE
**ptr
);
4474 static void mmap_init (void);
4477 /* Return a region overlapping address range START...END, or null if
4478 none. END is not including, i.e. the last byte in the range
4481 static struct mmap_region
*
4482 mmap_find (start
, end
)
4483 POINTER_TYPE
*start
, *end
;
4485 struct mmap_region
*r
;
4486 char *s
= (char *) start
, *e
= (char *) end
;
4488 for (r
= mmap_regions
; r
; r
= r
->next
)
4490 char *rstart
= (char *) r
;
4491 char *rend
= rstart
+ r
->nbytes_mapped
;
4493 if (/* First byte of range, i.e. START, in this region? */
4494 (s
>= rstart
&& s
< rend
)
4495 /* Last byte of range, i.e. END - 1, in this region? */
4496 || (e
> rstart
&& e
<= rend
)
4497 /* First byte of this region in the range? */
4498 || (rstart
>= s
&& rstart
< e
)
4499 /* Last byte of this region in the range? */
4500 || (rend
> s
&& rend
<= e
))
4508 /* Unmap a region. P is a pointer to the start of the user-araa of
4509 the region. Value is non-zero if successful. */
4513 struct mmap_region
*r
;
4516 r
->next
->prev
= r
->prev
;
4518 r
->prev
->next
= r
->next
;
4520 mmap_regions
= r
->next
;
4522 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4524 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4532 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4533 Value is non-zero if successful. */
4536 mmap_enlarge (r
, npages
)
4537 struct mmap_region
*r
;
4540 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4546 /* Unmap pages at the end of the region. */
4547 nbytes
= - npages
* mmap_page_size
;
4548 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4549 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4552 r
->nbytes_mapped
-= nbytes
;
4556 else if (npages
> 0)
4558 nbytes
= npages
* mmap_page_size
;
4560 /* Try to map additional pages at the end of the region. We
4561 cannot do this if the address range is already occupied by
4562 something else because mmap deletes any previous mapping.
4563 I'm not sure this is worth doing, let's see. */
4564 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4568 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4569 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4570 if (p
== MAP_FAILED
)
4571 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4572 else if (p
!= (POINTER_TYPE
*) region_end
)
4574 /* Kernels are free to choose a different address. In
4575 that case, unmap what we've mapped above; we have
4577 if (munmap (p
, nbytes
) == -1)
4578 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4582 r
->nbytes_mapped
+= nbytes
;
4592 /* Set or reset variables holding references to mapped regions. If
4593 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4594 non-zero, set all variables to the start of the user-areas
4597 This function is called from Fdump_emacs to ensure that the dumped
4598 Emacs doesn't contain references to memory that won't be mapped
4599 when Emacs starts. */
4602 mmap_set_vars (restore_p
)
4605 struct mmap_region
*r
;
4609 mmap_regions
= mmap_regions_1
;
4610 mmap_fd
= mmap_fd_1
;
4611 for (r
= mmap_regions
; r
; r
= r
->next
)
4612 *r
->var
= MMAP_USER_AREA (r
);
4616 for (r
= mmap_regions
; r
; r
= r
->next
)
4618 mmap_regions_1
= mmap_regions
;
4619 mmap_regions
= NULL
;
4620 mmap_fd_1
= mmap_fd
;
4626 /* Allocate a block of storage large enough to hold NBYTES bytes of
4627 data. A pointer to the data is returned in *VAR. VAR is thus the
4628 address of some variable which will use the data area.
4630 The allocation of 0 bytes is valid.
4632 If we can't allocate the necessary memory, set *VAR to null, and
4635 static POINTER_TYPE
*
4636 mmap_alloc (var
, nbytes
)
4645 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4646 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4649 if (p
== MAP_FAILED
)
4651 if (errno
!= ENOMEM
)
4652 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4657 struct mmap_region
*r
= (struct mmap_region
*) p
;
4659 r
->nbytes_specified
= nbytes
;
4660 r
->nbytes_mapped
= map
;
4663 r
->next
= mmap_regions
;
4668 p
= MMAP_USER_AREA (p
);
4675 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4676 resize it to size NBYTES. Change *VAR to reflect the new block,
4677 and return this value. If more memory cannot be allocated, then
4678 leave *VAR unchanged, and return null. */
4680 static POINTER_TYPE
*
4681 mmap_realloc (var
, nbytes
)
4685 POINTER_TYPE
*result
;
4690 result
= mmap_alloc (var
, nbytes
);
4691 else if (nbytes
== 0)
4694 result
= mmap_alloc (var
, nbytes
);
4698 struct mmap_region
*r
= MMAP_REGION (*var
);
4699 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4704 POINTER_TYPE
*old_ptr
= *var
;
4706 /* Try to map additional pages at the end of the region.
4707 If that fails, allocate a new region, copy data
4708 from the old region, then free it. */
4709 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4712 r
->nbytes_specified
= nbytes
;
4713 *var
= result
= old_ptr
;
4715 else if (mmap_alloc (var
, nbytes
))
4717 memcpy (*var
, old_ptr
, r
->nbytes_specified
);
4718 mmap_free_1 (MMAP_REGION (old_ptr
));
4720 r
= MMAP_REGION (result
);
4721 r
->nbytes_specified
= nbytes
;
4729 else if (room
- nbytes
>= mmap_page_size
)
4731 /* Shrinking by at least a page. Let's give some
4732 memory back to the system.
4734 The extra parens are to make the division happens first,
4735 on positive values, so we know it will round towards
4737 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4739 r
->nbytes_specified
= nbytes
;
4743 /* Leave it alone. */
4745 r
->nbytes_specified
= nbytes
;
4753 /* Free a block of relocatable storage whose data is pointed to by
4754 PTR. Store 0 in *PTR to show there's no block allocated. */
4764 mmap_free_1 (MMAP_REGION (*var
));
4770 /* Perform necessary intializations for the use of mmap. */
4776 /* The value of mmap_fd is initially 0 in temacs, and -1
4777 in a dumped Emacs. */
4780 /* No anonymous mmap -- we need the file descriptor. */
4781 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4783 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4785 #endif /* MAP_ANON == 0 */
4787 if (mmap_initialized_p
)
4789 mmap_initialized_p
= 1;
4795 mmap_page_size
= getpagesize ();
4798 #endif /* USE_MMAP_FOR_BUFFERS */
4802 /***********************************************************************
4803 Buffer-text Allocation
4804 ***********************************************************************/
4807 extern POINTER_TYPE
*r_alloc (POINTER_TYPE
**, size_t);
4808 extern POINTER_TYPE
*r_re_alloc (POINTER_TYPE
**, size_t);
4809 extern void r_alloc_free (POINTER_TYPE
**ptr
);
4810 #endif /* REL_ALLOC */
4813 /* Allocate NBYTES bytes for buffer B's text buffer. */
4816 alloc_buffer_text (struct buffer
*b
, size_t nbytes
)
4821 #if defined USE_MMAP_FOR_BUFFERS
4822 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4823 #elif defined REL_ALLOC
4824 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4826 p
= xmalloc (nbytes
);
4832 memory_full (nbytes
);
4835 b
->text
->beg
= (unsigned char *) p
;
4839 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4843 enlarge_buffer_text (struct buffer
*b
, EMACS_INT delta
)
4846 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4849 #if defined USE_MMAP_FOR_BUFFERS
4850 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4851 #elif defined REL_ALLOC
4852 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4854 p
= xrealloc (b
->text
->beg
, nbytes
);
4860 memory_full (nbytes
);
4863 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4868 /* Free buffer B's text buffer. */
4871 free_buffer_text (struct buffer
*b
)
4875 #if defined USE_MMAP_FOR_BUFFERS
4876 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4877 #elif defined REL_ALLOC
4878 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4880 xfree (b
->text
->beg
);
4883 BUF_BEG_ADDR (b
) = NULL
;
4889 /***********************************************************************
4891 ***********************************************************************/
4894 init_buffer_once (void)
4898 memset (buffer_permanent_local_flags
, 0, sizeof buffer_permanent_local_flags
);
4900 /* Make sure all markable slots in buffer_defaults
4901 are initialized reasonably, so mark_buffer won't choke. */
4902 reset_buffer (&buffer_defaults
);
4903 eassert (EQ (BVAR (&buffer_defaults
, name
), make_number (0)));
4904 reset_buffer_local_variables (&buffer_defaults
, 1);
4905 eassert (EQ (BVAR (&buffer_local_symbols
, name
), make_number (0)));
4906 reset_buffer (&buffer_local_symbols
);
4907 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4908 /* Prevent GC from getting confused. */
4909 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4910 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4911 BUF_INTERVALS (&buffer_defaults
) = 0;
4912 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4913 XSETPVECTYPESIZE (&buffer_defaults
, PVEC_BUFFER
, 0);
4914 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4915 XSETPVECTYPESIZE (&buffer_local_symbols
, PVEC_BUFFER
, 0);
4916 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4918 /* Set up the default values of various buffer slots. */
4919 /* Must do these before making the first buffer! */
4921 /* real setup is done in bindings.el */
4922 BVAR (&buffer_defaults
, mode_line_format
) = make_pure_c_string ("%-");
4923 BVAR (&buffer_defaults
, header_line_format
) = Qnil
;
4924 BVAR (&buffer_defaults
, abbrev_mode
) = Qnil
;
4925 BVAR (&buffer_defaults
, overwrite_mode
) = Qnil
;
4926 BVAR (&buffer_defaults
, case_fold_search
) = Qt
;
4927 BVAR (&buffer_defaults
, auto_fill_function
) = Qnil
;
4928 BVAR (&buffer_defaults
, selective_display
) = Qnil
;
4930 BVAR (&buffer_defaults
, selective_display_ellipses
) = Qt
;
4932 BVAR (&buffer_defaults
, abbrev_table
) = Qnil
;
4933 BVAR (&buffer_defaults
, display_table
) = Qnil
;
4934 BVAR (&buffer_defaults
, undo_list
) = Qnil
;
4935 BVAR (&buffer_defaults
, mark_active
) = Qnil
;
4936 BVAR (&buffer_defaults
, file_format
) = Qnil
;
4937 BVAR (&buffer_defaults
, auto_save_file_format
) = Qt
;
4938 buffer_defaults
.overlays_before
= NULL
;
4939 buffer_defaults
.overlays_after
= NULL
;
4940 buffer_defaults
.overlay_center
= BEG
;
4942 XSETFASTINT (BVAR (&buffer_defaults
, tab_width
), 8);
4943 BVAR (&buffer_defaults
, truncate_lines
) = Qnil
;
4944 BVAR (&buffer_defaults
, word_wrap
) = Qnil
;
4945 BVAR (&buffer_defaults
, ctl_arrow
) = Qt
;
4946 BVAR (&buffer_defaults
, bidi_display_reordering
) = Qnil
;
4947 BVAR (&buffer_defaults
, bidi_paragraph_direction
) = Qnil
;
4948 BVAR (&buffer_defaults
, cursor_type
) = Qt
;
4949 BVAR (&buffer_defaults
, extra_line_spacing
) = Qnil
;
4950 BVAR (&buffer_defaults
, cursor_in_non_selected_windows
) = Qt
;
4952 BVAR (&buffer_defaults
, enable_multibyte_characters
) = Qt
;
4953 BVAR (&buffer_defaults
, buffer_file_coding_system
) = Qnil
;
4954 XSETFASTINT (BVAR (&buffer_defaults
, fill_column
), 70);
4955 XSETFASTINT (BVAR (&buffer_defaults
, left_margin
), 0);
4956 BVAR (&buffer_defaults
, cache_long_line_scans
) = Qnil
;
4957 BVAR (&buffer_defaults
, file_truename
) = Qnil
;
4958 XSETFASTINT (BVAR (&buffer_defaults
, display_count
), 0);
4959 XSETFASTINT (BVAR (&buffer_defaults
, left_margin_cols
), 0);
4960 XSETFASTINT (BVAR (&buffer_defaults
, right_margin_cols
), 0);
4961 BVAR (&buffer_defaults
, left_fringe_width
) = Qnil
;
4962 BVAR (&buffer_defaults
, right_fringe_width
) = Qnil
;
4963 BVAR (&buffer_defaults
, fringes_outside_margins
) = Qnil
;
4964 BVAR (&buffer_defaults
, scroll_bar_width
) = Qnil
;
4965 BVAR (&buffer_defaults
, vertical_scroll_bar_type
) = Qt
;
4966 BVAR (&buffer_defaults
, indicate_empty_lines
) = Qnil
;
4967 BVAR (&buffer_defaults
, indicate_buffer_boundaries
) = Qnil
;
4968 BVAR (&buffer_defaults
, fringe_indicator_alist
) = Qnil
;
4969 BVAR (&buffer_defaults
, fringe_cursor_alist
) = Qnil
;
4970 BVAR (&buffer_defaults
, scroll_up_aggressively
) = Qnil
;
4971 BVAR (&buffer_defaults
, scroll_down_aggressively
) = Qnil
;
4972 BVAR (&buffer_defaults
, display_time
) = Qnil
;
4974 /* Assign the local-flags to the slots that have default values.
4975 The local flag is a bit that is used in the buffer
4976 to say that it has its own local value for the slot.
4977 The local flag bits are in the local_var_flags slot of the buffer. */
4979 /* Nothing can work if this isn't true */
4980 { verify (sizeof (EMACS_INT
) == sizeof (Lisp_Object
)); }
4982 /* 0 means not a lisp var, -1 means always local, else mask */
4983 memset (&buffer_local_flags
, 0, sizeof buffer_local_flags
);
4984 XSETINT (BVAR (&buffer_local_flags
, filename
), -1);
4985 XSETINT (BVAR (&buffer_local_flags
, directory
), -1);
4986 XSETINT (BVAR (&buffer_local_flags
, backed_up
), -1);
4987 XSETINT (BVAR (&buffer_local_flags
, save_length
), -1);
4988 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_name
), -1);
4989 XSETINT (BVAR (&buffer_local_flags
, read_only
), -1);
4990 XSETINT (BVAR (&buffer_local_flags
, major_mode
), -1);
4991 XSETINT (BVAR (&buffer_local_flags
, mode_name
), -1);
4992 XSETINT (BVAR (&buffer_local_flags
, undo_list
), -1);
4993 XSETINT (BVAR (&buffer_local_flags
, mark_active
), -1);
4994 XSETINT (BVAR (&buffer_local_flags
, point_before_scroll
), -1);
4995 XSETINT (BVAR (&buffer_local_flags
, file_truename
), -1);
4996 XSETINT (BVAR (&buffer_local_flags
, invisibility_spec
), -1);
4997 XSETINT (BVAR (&buffer_local_flags
, file_format
), -1);
4998 XSETINT (BVAR (&buffer_local_flags
, auto_save_file_format
), -1);
4999 XSETINT (BVAR (&buffer_local_flags
, display_count
), -1);
5000 XSETINT (BVAR (&buffer_local_flags
, display_time
), -1);
5001 XSETINT (BVAR (&buffer_local_flags
, enable_multibyte_characters
), -1);
5004 XSETFASTINT (BVAR (&buffer_local_flags
, mode_line_format
), idx
); ++idx
;
5005 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_mode
), idx
); ++idx
;
5006 XSETFASTINT (BVAR (&buffer_local_flags
, overwrite_mode
), idx
); ++idx
;
5007 XSETFASTINT (BVAR (&buffer_local_flags
, case_fold_search
), idx
); ++idx
;
5008 XSETFASTINT (BVAR (&buffer_local_flags
, auto_fill_function
), idx
); ++idx
;
5009 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display
), idx
); ++idx
;
5011 XSETFASTINT (BVAR (&buffer_local_flags
, selective_display_ellipses
), idx
); ++idx
;
5013 XSETFASTINT (BVAR (&buffer_local_flags
, tab_width
), idx
); ++idx
;
5014 XSETFASTINT (BVAR (&buffer_local_flags
, truncate_lines
), idx
); ++idx
;
5015 XSETFASTINT (BVAR (&buffer_local_flags
, word_wrap
), idx
); ++idx
;
5016 XSETFASTINT (BVAR (&buffer_local_flags
, ctl_arrow
), idx
); ++idx
;
5017 XSETFASTINT (BVAR (&buffer_local_flags
, fill_column
), idx
); ++idx
;
5018 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin
), idx
); ++idx
;
5019 XSETFASTINT (BVAR (&buffer_local_flags
, abbrev_table
), idx
); ++idx
;
5020 XSETFASTINT (BVAR (&buffer_local_flags
, display_table
), idx
); ++idx
;
5021 XSETFASTINT (BVAR (&buffer_local_flags
, syntax_table
), idx
); ++idx
;
5022 XSETFASTINT (BVAR (&buffer_local_flags
, cache_long_line_scans
), idx
); ++idx
;
5023 XSETFASTINT (BVAR (&buffer_local_flags
, category_table
), idx
); ++idx
;
5024 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_display_reordering
), idx
); ++idx
;
5025 XSETFASTINT (BVAR (&buffer_local_flags
, bidi_paragraph_direction
), idx
); ++idx
;
5026 XSETFASTINT (BVAR (&buffer_local_flags
, buffer_file_coding_system
), idx
);
5027 /* Make this one a permanent local. */
5028 buffer_permanent_local_flags
[idx
++] = 1;
5029 XSETFASTINT (BVAR (&buffer_local_flags
, left_margin_cols
), idx
); ++idx
;
5030 XSETFASTINT (BVAR (&buffer_local_flags
, right_margin_cols
), idx
); ++idx
;
5031 XSETFASTINT (BVAR (&buffer_local_flags
, left_fringe_width
), idx
); ++idx
;
5032 XSETFASTINT (BVAR (&buffer_local_flags
, right_fringe_width
), idx
); ++idx
;
5033 XSETFASTINT (BVAR (&buffer_local_flags
, fringes_outside_margins
), idx
); ++idx
;
5034 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_bar_width
), idx
); ++idx
;
5035 XSETFASTINT (BVAR (&buffer_local_flags
, vertical_scroll_bar_type
), idx
); ++idx
;
5036 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_empty_lines
), idx
); ++idx
;
5037 XSETFASTINT (BVAR (&buffer_local_flags
, indicate_buffer_boundaries
), idx
); ++idx
;
5038 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_indicator_alist
), idx
); ++idx
;
5039 XSETFASTINT (BVAR (&buffer_local_flags
, fringe_cursor_alist
), idx
); ++idx
;
5040 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_up_aggressively
), idx
); ++idx
;
5041 XSETFASTINT (BVAR (&buffer_local_flags
, scroll_down_aggressively
), idx
); ++idx
;
5042 XSETFASTINT (BVAR (&buffer_local_flags
, header_line_format
), idx
); ++idx
;
5043 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_type
), idx
); ++idx
;
5044 XSETFASTINT (BVAR (&buffer_local_flags
, extra_line_spacing
), idx
); ++idx
;
5045 XSETFASTINT (BVAR (&buffer_local_flags
, cursor_in_non_selected_windows
), idx
); ++idx
;
5047 /* Need more room? */
5048 if (idx
>= MAX_PER_BUFFER_VARS
)
5050 last_per_buffer_idx
= idx
;
5052 Vbuffer_alist
= Qnil
;
5056 QSFundamental
= make_pure_c_string ("Fundamental");
5058 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5059 BVAR (&buffer_defaults
, major_mode
) = Qfundamental_mode
;
5061 Qmode_class
= intern_c_string ("mode-class");
5063 Qprotected_field
= intern_c_string ("protected-field");
5065 Qpermanent_local
= intern_c_string ("permanent-local");
5067 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5068 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5070 Qucs_set_table_for_input
= intern_c_string ("ucs-set-table-for-input");
5072 /* super-magic invisible buffer */
5073 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5074 Vbuffer_alist
= Qnil
;
5076 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5078 inhibit_modification_hooks
= 0;
5088 #ifdef USE_MMAP_FOR_BUFFERS
5090 /* When using the ralloc implementation based on mmap(2), buffer
5091 text pointers will have been set to null in the dumped Emacs.
5095 for (b
= all_buffers
; b
; b
= b
->header
.next
.buffer
)
5096 if (b
->text
->beg
== NULL
)
5097 enlarge_buffer_text (b
, 0);
5099 #endif /* USE_MMAP_FOR_BUFFERS */
5101 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5102 if (NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5103 Fset_buffer_multibyte (Qnil
);
5105 pwd
= get_current_dir_name ();
5108 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5110 /* Maybe this should really use some standard subroutine
5111 whose definition is filename syntax dependent. */
5113 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5115 /* Grow buffer to add directory separator and '\0'. */
5116 pwd
= (char *) realloc (pwd
, len
+ 2);
5118 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5119 pwd
[len
] = DIRECTORY_SEP
;
5120 pwd
[len
+ 1] = '\0';
5123 BVAR (current_buffer
, directory
) = make_unibyte_string (pwd
, strlen (pwd
));
5124 if (! NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
)))
5125 /* At this moment, we still don't know how to decode the
5126 directory name. So, we keep the bytes in multibyte form so
5127 that ENCODE_FILE correctly gets the original bytes. */
5128 BVAR (current_buffer
, directory
)
5129 = string_to_multibyte (BVAR (current_buffer
, directory
));
5131 /* Add /: to the front of the name
5132 if it would otherwise be treated as magic. */
5133 temp
= Ffind_file_name_handler (BVAR (current_buffer
, directory
), Qt
);
5135 /* If the default dir is just /, TEMP is non-nil
5136 because of the ange-ftp completion handler.
5137 However, it is not necessary to turn / into /:/.
5138 So avoid doing that. */
5139 && strcmp ("/", SSDATA (BVAR (current_buffer
, directory
))))
5140 BVAR (current_buffer
, directory
)
5141 = concat2 (build_string ("/:"), BVAR (current_buffer
, directory
));
5143 temp
= get_minibuffer (0);
5144 BVAR (XBUFFER (temp
), directory
) = BVAR (current_buffer
, directory
);
5149 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5150 Object stored in the current buffer. address is the address of the slot
5151 in the buffer that is current now. */
5153 /* TYPE is nil for a general Lisp variable.
5154 An integer specifies a type; then only Lisp values
5155 with that type code are allowed (except that nil is allowed too).
5156 LNAME is the Lisp-level variable name.
5157 VNAME is the name of the buffer slot.
5158 DOC is a dummy where you write the doc string as a comment. */
5159 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5161 static struct Lisp_Buffer_Objfwd bo_fwd; \
5162 defvar_per_buffer (&bo_fwd, lname, vname, type); \
5166 defvar_per_buffer (struct Lisp_Buffer_Objfwd
*bo_fwd
, const char *namestring
,
5167 Lisp_Object
*address
, Lisp_Object type
)
5169 struct Lisp_Symbol
*sym
;
5172 sym
= XSYMBOL (intern (namestring
));
5173 offset
= (char *)address
- (char *)current_buffer
;
5175 bo_fwd
->type
= Lisp_Fwd_Buffer_Obj
;
5176 bo_fwd
->offset
= offset
;
5177 bo_fwd
->slottype
= type
;
5178 sym
->declared_special
= 1;
5179 sym
->redirect
= SYMBOL_FORWARDED
;
5181 /* I tried to do the job without a cast, but it seems impossible.
5182 union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
5183 SET_SYMBOL_FWD (sym
, (union Lisp_Fwd
*)bo_fwd
);
5185 XSETSYMBOL (PER_BUFFER_SYMBOL (offset
), sym
);
5187 if (PER_BUFFER_IDX (offset
) == 0)
5188 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5189 slot of buffer_local_flags */
5194 /* initialize the buffer routines */
5196 syms_of_buffer (void)
5198 staticpro (&last_overlay_modification_hooks
);
5199 last_overlay_modification_hooks
5200 = Fmake_vector (make_number (10), Qnil
);
5202 staticpro (&Vbuffer_defaults
);
5203 staticpro (&Vbuffer_local_symbols
);
5204 staticpro (&Qfundamental_mode
);
5205 staticpro (&Qmode_class
);
5206 staticpro (&QSFundamental
);
5207 staticpro (&Vbuffer_alist
);
5208 staticpro (&Qprotected_field
);
5209 staticpro (&Qpermanent_local
);
5210 Qpermanent_local_hook
= intern_c_string ("permanent-local-hook");
5211 staticpro (&Qpermanent_local_hook
);
5212 staticpro (&Qkill_buffer_hook
);
5213 Qoverlayp
= intern_c_string ("overlayp");
5214 staticpro (&Qoverlayp
);
5215 Qevaporate
= intern_c_string ("evaporate");
5216 staticpro (&Qevaporate
);
5217 Qmodification_hooks
= intern_c_string ("modification-hooks");
5218 staticpro (&Qmodification_hooks
);
5219 Qinsert_in_front_hooks
= intern_c_string ("insert-in-front-hooks");
5220 staticpro (&Qinsert_in_front_hooks
);
5221 Qinsert_behind_hooks
= intern_c_string ("insert-behind-hooks");
5222 staticpro (&Qinsert_behind_hooks
);
5223 Qget_file_buffer
= intern_c_string ("get-file-buffer");
5224 staticpro (&Qget_file_buffer
);
5225 Qpriority
= intern_c_string ("priority");
5226 staticpro (&Qpriority
);
5227 Qbefore_string
= intern_c_string ("before-string");
5228 staticpro (&Qbefore_string
);
5229 Qafter_string
= intern_c_string ("after-string");
5230 staticpro (&Qafter_string
);
5231 Qfirst_change_hook
= intern_c_string ("first-change-hook");
5232 staticpro (&Qfirst_change_hook
);
5233 Qbefore_change_functions
= intern_c_string ("before-change-functions");
5234 staticpro (&Qbefore_change_functions
);
5235 Qafter_change_functions
= intern_c_string ("after-change-functions");
5236 staticpro (&Qafter_change_functions
);
5237 /* The next one is initialized in init_buffer_once. */
5238 staticpro (&Qucs_set_table_for_input
);
5240 Qkill_buffer_query_functions
= intern_c_string ("kill-buffer-query-functions");
5241 staticpro (&Qkill_buffer_query_functions
);
5243 Fput (Qprotected_field
, Qerror_conditions
,
5244 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5245 Fput (Qprotected_field
, Qerror_message
,
5246 make_pure_c_string ("Attempt to modify a protected field"));
5248 DEFVAR_BUFFER_DEFAULTS ("default-mode-line-format",
5250 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5251 This is the same as (default-value 'mode-line-format). */);
5253 DEFVAR_BUFFER_DEFAULTS ("default-header-line-format",
5255 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5256 This is the same as (default-value 'header-line-format). */);
5258 DEFVAR_BUFFER_DEFAULTS ("default-cursor-type", cursor_type
,
5259 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5260 This is the same as (default-value 'cursor-type). */);
5262 DEFVAR_BUFFER_DEFAULTS ("default-line-spacing",
5264 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5265 This is the same as (default-value 'line-spacing). */);
5267 DEFVAR_BUFFER_DEFAULTS ("default-cursor-in-non-selected-windows",
5268 cursor_in_non_selected_windows
,
5269 doc
: /* Default value of `cursor-in-non-selected-windows'.
5270 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5272 DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode",
5274 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5275 This is the same as (default-value 'abbrev-mode). */);
5277 DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow",
5279 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5280 This is the same as (default-value 'ctl-arrow). */);
5282 DEFVAR_BUFFER_DEFAULTS ("default-enable-multibyte-characters",
5283 enable_multibyte_characters
,
5284 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5285 This is the same as (default-value 'enable-multibyte-characters). */);
5287 DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system",
5288 buffer_file_coding_system
,
5289 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5290 This is the same as (default-value 'buffer-file-coding-system). */);
5292 DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines",
5294 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5295 This is the same as (default-value 'truncate-lines). */);
5297 DEFVAR_BUFFER_DEFAULTS ("default-fill-column",
5299 doc
: /* Default value of `fill-column' for buffers that do not override it.
5300 This is the same as (default-value 'fill-column). */);
5302 DEFVAR_BUFFER_DEFAULTS ("default-left-margin",
5304 doc
: /* Default value of `left-margin' for buffers that do not override it.
5305 This is the same as (default-value 'left-margin). */);
5307 DEFVAR_BUFFER_DEFAULTS ("default-tab-width",
5309 doc
: /* Default value of `tab-width' for buffers that do not override it.
5310 This is the same as (default-value 'tab-width). */);
5312 DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search",
5314 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5315 This is the same as (default-value 'case-fold-search). */);
5317 DEFVAR_BUFFER_DEFAULTS ("default-left-margin-width",
5319 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5320 This is the same as (default-value 'left-margin-width). */);
5322 DEFVAR_BUFFER_DEFAULTS ("default-right-margin-width",
5324 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5325 This is the same as (default-value 'right-margin-width). */);
5327 DEFVAR_BUFFER_DEFAULTS ("default-left-fringe-width",
5329 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5330 This is the same as (default-value 'left-fringe-width). */);
5332 DEFVAR_BUFFER_DEFAULTS ("default-right-fringe-width",
5334 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5335 This is the same as (default-value 'right-fringe-width). */);
5337 DEFVAR_BUFFER_DEFAULTS ("default-fringes-outside-margins",
5338 fringes_outside_margins
,
5339 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5340 This is the same as (default-value 'fringes-outside-margins). */);
5342 DEFVAR_BUFFER_DEFAULTS ("default-scroll-bar-width",
5344 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5345 This is the same as (default-value 'scroll-bar-width). */);
5347 DEFVAR_BUFFER_DEFAULTS ("default-vertical-scroll-bar",
5348 vertical_scroll_bar_type
,
5349 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5350 This is the same as (default-value 'vertical-scroll-bar). */);
5352 DEFVAR_BUFFER_DEFAULTS ("default-indicate-empty-lines",
5353 indicate_empty_lines
,
5354 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5355 This is the same as (default-value 'indicate-empty-lines). */);
5357 DEFVAR_BUFFER_DEFAULTS ("default-indicate-buffer-boundaries",
5358 indicate_buffer_boundaries
,
5359 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5360 This is the same as (default-value 'indicate-buffer-boundaries). */);
5362 DEFVAR_BUFFER_DEFAULTS ("default-fringe-indicator-alist",
5363 fringe_indicator_alist
,
5364 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5365 This is the same as (default-value 'fringe-indicator-alist'). */);
5367 DEFVAR_BUFFER_DEFAULTS ("default-fringe-cursor-alist",
5368 fringe_cursor_alist
,
5369 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5370 This is the same as (default-value 'fringe-cursor-alist'). */);
5372 DEFVAR_BUFFER_DEFAULTS ("default-scroll-up-aggressively",
5373 scroll_up_aggressively
,
5374 doc
: /* Default value of `scroll-up-aggressively'.
5375 This value applies in buffers that don't have their own local values.
5376 This is the same as (default-value 'scroll-up-aggressively). */);
5378 DEFVAR_BUFFER_DEFAULTS ("default-scroll-down-aggressively",
5379 scroll_down_aggressively
,
5380 doc
: /* Default value of `scroll-down-aggressively'.
5381 This value applies in buffers that don't have their own local values.
5382 This is the same as (default-value 'scroll-down-aggressively). */);
5384 DEFVAR_PER_BUFFER ("header-line-format",
5385 &BVAR (current_buffer
, header_line_format
),
5387 doc
: /* Analogous to `mode-line-format', but controls the header line.
5388 The header line appears, optionally, at the top of a window;
5389 the mode line appears at the bottom. */);
5391 DEFVAR_PER_BUFFER ("mode-line-format", &BVAR (current_buffer
, mode_line_format
),
5393 doc
: /* Template for displaying mode line for current buffer.
5394 Each buffer has its own value of this variable.
5395 Value may be nil, a string, a symbol or a list or cons cell.
5396 A value of nil means don't display a mode line.
5397 For a symbol, its value is used (but it is ignored if t or nil).
5398 A string appearing directly as the value of a symbol is processed verbatim
5399 in that the %-constructs below are not recognized.
5400 Note that unless the symbol is marked as a `risky-local-variable', all
5401 properties in any strings, as well as all :eval and :propertize forms
5402 in the value of that symbol will be ignored.
5403 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5404 is used as a mode line element. Be careful--FORM should not load any files,
5405 because that can cause an infinite recursion.
5406 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5407 with the specified properties PROPS applied.
5408 For a list whose car is a symbol, the symbol's value is taken,
5409 and if that is non-nil, the cadr of the list is processed recursively.
5410 Otherwise, the caddr of the list (if there is one) is processed.
5411 For a list whose car is a string or list, each element is processed
5412 recursively and the results are effectively concatenated.
5413 For a list whose car is an integer, the cdr of the list is processed
5414 and padded (if the number is positive) or truncated (if negative)
5415 to the width specified by that number.
5416 A string is printed verbatim in the mode line except for %-constructs:
5417 (%-constructs are allowed when the string is the entire mode-line-format
5418 or when it is found in a cons-cell or a list)
5419 %b -- print buffer name. %f -- print visited file name.
5420 %F -- print frame name.
5421 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5422 %& is like %*, but ignore read-only-ness.
5423 % means buffer is read-only and * means it is modified.
5424 For a modified read-only buffer, %* gives % and %+ gives *.
5425 %s -- print process status. %l -- print the current line number.
5426 %c -- print the current column number (this makes editing slower).
5427 To make the column number update correctly in all cases,
5428 `column-number-mode' must be non-nil.
5429 %i -- print the size of the buffer.
5430 %I -- like %i, but use k, M, G, etc., to abbreviate.
5431 %p -- print percent of buffer above top of window, or Top, Bot or All.
5432 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5433 or print Bottom or All.
5434 %n -- print Narrow if appropriate.
5435 %t -- visited file is text or binary (if OS supports this distinction).
5436 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5437 %Z -- like %z, but including the end-of-line format.
5438 %e -- print error message about full memory.
5439 %@ -- print @ or hyphen. @ means that default-directory is on a
5441 %[ -- print one [ for each recursive editing level. %] similar.
5442 %% -- print %. %- -- print infinitely many dashes.
5443 Decimal digits after the % specify field width to which to pad. */);
5445 DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode
,
5446 doc
: /* *Value of `major-mode' for new buffers. */);
5448 DEFVAR_PER_BUFFER ("major-mode", &BVAR (current_buffer
, major_mode
),
5449 make_number (Lisp_Symbol
),
5450 doc
: /* Symbol for current buffer's major mode.
5451 The default value (normally `fundamental-mode') affects new buffers.
5452 A value of nil means to use the current buffer's major mode, provided
5453 it is not marked as "special".
5455 When a mode is used by default, `find-file' switches to it before it
5456 reads the contents into the buffer and before it finishes setting up
5457 the buffer. Thus, the mode and its hooks should not expect certain
5458 variables such as `buffer-read-only' and `buffer-file-coding-system'
5461 DEFVAR_PER_BUFFER ("mode-name", &BVAR (current_buffer
, mode_name
),
5463 doc
: /* Pretty name of current buffer's major mode.
5464 Usually a string, but can use any of the constructs for `mode-line-format',
5466 Format with `format-mode-line' to produce a string value. */);
5468 DEFVAR_PER_BUFFER ("local-abbrev-table", &BVAR (current_buffer
, abbrev_table
), Qnil
,
5469 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5471 DEFVAR_PER_BUFFER ("abbrev-mode", &BVAR (current_buffer
, abbrev_mode
), Qnil
,
5472 doc
: /* Non-nil if Abbrev mode is enabled.
5473 Use the command `abbrev-mode' to change this variable. */);
5475 DEFVAR_PER_BUFFER ("case-fold-search", &BVAR (current_buffer
, case_fold_search
),
5477 doc
: /* *Non-nil if searches and matches should ignore case. */);
5479 DEFVAR_PER_BUFFER ("fill-column", &BVAR (current_buffer
, fill_column
),
5480 make_number (LISP_INT_TAG
),
5481 doc
: /* *Column beyond which automatic line-wrapping should happen.
5482 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5484 DEFVAR_PER_BUFFER ("left-margin", &BVAR (current_buffer
, left_margin
),
5485 make_number (LISP_INT_TAG
),
5486 doc
: /* *Column for the default `indent-line-function' to indent to.
5487 Linefeed indents to this column in Fundamental mode. */);
5489 DEFVAR_PER_BUFFER ("tab-width", &BVAR (current_buffer
, tab_width
),
5490 make_number (LISP_INT_TAG
),
5491 doc
: /* *Distance between tab stops (for display of tab characters), in columns.
5492 This should be an integer greater than zero. */);
5494 DEFVAR_PER_BUFFER ("ctl-arrow", &BVAR (current_buffer
, ctl_arrow
), Qnil
,
5495 doc
: /* *Non-nil means display control chars with uparrow.
5496 A value of nil means use backslash and octal digits.
5497 This variable does not apply to characters whose display is specified
5498 in the current display table (if there is one). */);
5500 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5501 &BVAR (current_buffer
, enable_multibyte_characters
),
5503 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5504 Otherwise they are regarded as unibyte. This affects the display,
5505 file I/O and the behavior of various editing commands.
5507 This variable is buffer-local but you cannot set it directly;
5508 use the function `set-buffer-multibyte' to change a buffer's representation.
5509 Changing its default value with `setq-default' is supported.
5510 See also variable `default-enable-multibyte-characters' and Info node
5511 `(elisp)Text Representations'. */);
5512 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5514 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5515 &BVAR (current_buffer
, buffer_file_coding_system
), Qnil
,
5516 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5517 This variable applies to saving the buffer, and also to `write-region'
5518 and other functions that use `write-region'.
5519 It does not apply to sending output to subprocesses, however.
5521 If this is nil, the buffer is saved without any code conversion
5522 unless some coding system is specified in `file-coding-system-alist'
5523 for the buffer file.
5525 If the text to be saved cannot be encoded as specified by this variable,
5526 an alternative encoding is selected by `select-safe-coding-system', which see.
5528 The variable `coding-system-for-write', if non-nil, overrides this variable.
5530 This variable is never applied to a way of decoding a file while reading it. */);
5532 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5533 &BVAR (current_buffer
, bidi_display_reordering
), Qnil
,
5534 doc
: /* Non-nil means reorder bidirectional text for display in the visual order. */);
5536 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5537 &BVAR (current_buffer
, bidi_paragraph_direction
), Qnil
,
5538 doc
: /* *If non-nil, forces directionality of text paragraphs in the buffer.
5540 If this is nil (the default), the direction of each paragraph is
5541 determined by the first strong directional character of its text.
5542 The values of `right-to-left' and `left-to-right' override that.
5543 Any other value is treated as nil.
5545 This variable has no effect unless the buffer's value of
5546 \`bidi-display-reordering' is non-nil. */);
5548 DEFVAR_PER_BUFFER ("truncate-lines", &BVAR (current_buffer
, truncate_lines
), Qnil
,
5549 doc
: /* *Non-nil means do not display continuation lines.
5550 Instead, give each line of text just one screen line.
5552 Note that this is overridden by the variable
5553 `truncate-partial-width-windows' if that variable is non-nil
5554 and this buffer is not full-frame width. */);
5556 DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer
, word_wrap
), Qnil
,
5557 doc
: /* *Non-nil means to use word-wrapping for continuation lines.
5558 When word-wrapping is on, continuation lines are wrapped at the space
5559 or tab character nearest to the right window edge.
5560 If nil, continuation lines are wrapped at the right screen edge.
5562 This variable has no effect if long lines are truncated (see
5563 `truncate-lines' and `truncate-partial-width-windows'). If you use
5564 word-wrapping, you might want to reduce the value of
5565 `truncate-partial-width-windows', since wrapping can make text readable
5566 in narrower windows. */);
5568 DEFVAR_PER_BUFFER ("default-directory", &BVAR (current_buffer
, directory
),
5569 make_number (Lisp_String
),
5570 doc
: /* Name of default directory of current buffer. Should end with slash.
5571 To interactively change the default directory, use command `cd'. */);
5573 DEFVAR_PER_BUFFER ("auto-fill-function", &BVAR (current_buffer
, auto_fill_function
),
5575 doc
: /* Function called (if non-nil) to perform auto-fill.
5576 It is called after self-inserting any character specified in
5577 the `auto-fill-chars' table.
5578 NOTE: This variable is not a hook;
5579 its value may not be a list of functions. */);
5581 DEFVAR_PER_BUFFER ("buffer-file-name", &BVAR (current_buffer
, filename
),
5582 make_number (Lisp_String
),
5583 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5585 DEFVAR_PER_BUFFER ("buffer-file-truename", &BVAR (current_buffer
, file_truename
),
5586 make_number (Lisp_String
),
5587 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5588 The truename of a file is calculated by `file-truename'
5589 and then abbreviated with `abbreviate-file-name'. */);
5591 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5592 &BVAR (current_buffer
, auto_save_file_name
),
5593 make_number (Lisp_String
),
5594 doc
: /* Name of file for auto-saving current buffer.
5595 If it is nil, that means don't auto-save this buffer. */);
5597 DEFVAR_PER_BUFFER ("buffer-read-only", &BVAR (current_buffer
, read_only
), Qnil
,
5598 doc
: /* Non-nil if this buffer is read-only. */);
5600 DEFVAR_PER_BUFFER ("buffer-backed-up", &BVAR (current_buffer
, backed_up
), Qnil
,
5601 doc
: /* Non-nil if this buffer's file has been backed up.
5602 Backing up is done before the first time the file is saved. */);
5604 DEFVAR_PER_BUFFER ("buffer-saved-size", &BVAR (current_buffer
, save_length
),
5605 make_number (LISP_INT_TAG
),
5606 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5608 -1 means auto-saving turned off until next real save.
5610 If you set this to -2, that means don't turn off auto-saving in this buffer
5611 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5612 you probably should set this to -2 in that buffer. */);
5614 DEFVAR_PER_BUFFER ("selective-display", &BVAR (current_buffer
, selective_display
),
5616 doc
: /* Non-nil enables selective display.
5617 An integer N as value means display only lines
5618 that start with less than N columns of space.
5619 A value of t means that the character ^M makes itself and
5620 all the rest of the line invisible; also, when saving the buffer
5621 in a file, save the ^M as a newline. */);
5624 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5625 &BVAR (current_buffer
, selective_display_ellipses
),
5627 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5630 DEFVAR_PER_BUFFER ("overwrite-mode", &BVAR (current_buffer
, overwrite_mode
), Qnil
,
5631 doc
: /* Non-nil if self-insertion should replace existing text.
5632 The value should be one of `overwrite-mode-textual',
5633 `overwrite-mode-binary', or nil.
5634 If it is `overwrite-mode-textual', self-insertion still
5635 inserts at the end of a line, and inserts when point is before a tab,
5636 until the tab is filled in.
5637 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5639 DEFVAR_PER_BUFFER ("buffer-display-table", &BVAR (current_buffer
, display_table
),
5641 doc
: /* Display table that controls display of the contents of current buffer.
5643 If this variable is nil, the value of `standard-display-table' is used.
5644 Each window can have its own, overriding display table, see
5645 `set-window-display-table' and `window-display-table'.
5647 The display table is a char-table created with `make-display-table'.
5648 A char-table is an array indexed by character codes. Normal array
5649 primitives `aref' and `aset' can be used to access elements of a char-table.
5651 Each of the char-table elements control how to display the corresponding
5652 text character: the element at index C in the table says how to display
5653 the character whose code is C. Each element should be a vector of
5654 characters or nil. The value nil means display the character in the
5655 default fashion; otherwise, the characters from the vector are delivered
5656 to the screen instead of the original character.
5658 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5659 to display a capital Y instead of each X character.
5661 In addition, a char-table has six extra slots to control the display of:
5663 the end of a truncated screen line (extra-slot 0, a single character);
5664 the end of a continued line (extra-slot 1, a single character);
5665 the escape character used to display character codes in octal
5666 (extra-slot 2, a single character);
5667 the character used as an arrow for control characters (extra-slot 3,
5668 a single character);
5669 the decoration indicating the presence of invisible lines (extra-slot 4,
5670 a vector of characters);
5671 the character used to draw the border between side-by-side windows
5672 (extra-slot 5, a single character).
5674 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5676 DEFVAR_PER_BUFFER ("left-margin-width", &BVAR (current_buffer
, left_margin_cols
),
5678 doc
: /* *Width of left marginal area for display of a buffer.
5679 A value of nil means no marginal area. */);
5681 DEFVAR_PER_BUFFER ("right-margin-width", &BVAR (current_buffer
, right_margin_cols
),
5683 doc
: /* *Width of right marginal area for display of a buffer.
5684 A value of nil means no marginal area. */);
5686 DEFVAR_PER_BUFFER ("left-fringe-width", &BVAR (current_buffer
, left_fringe_width
),
5688 doc
: /* *Width of this buffer's left fringe (in pixels).
5689 A value of 0 means no left fringe is shown in this buffer's window.
5690 A value of nil means to use the left fringe width from the window's frame. */);
5692 DEFVAR_PER_BUFFER ("right-fringe-width", &BVAR (current_buffer
, right_fringe_width
),
5694 doc
: /* *Width of this buffer's right fringe (in pixels).
5695 A value of 0 means no right fringe is shown in this buffer's window.
5696 A value of nil means to use the right fringe width from the window's frame. */);
5698 DEFVAR_PER_BUFFER ("fringes-outside-margins", &BVAR (current_buffer
, fringes_outside_margins
),
5700 doc
: /* *Non-nil means to display fringes outside display margins.
5701 A value of nil means to display fringes between margins and buffer text. */);
5703 DEFVAR_PER_BUFFER ("scroll-bar-width", &BVAR (current_buffer
, scroll_bar_width
),
5705 doc
: /* *Width of this buffer's scroll bars in pixels.
5706 A value of nil means to use the scroll bar width from the window's frame. */);
5708 DEFVAR_PER_BUFFER ("vertical-scroll-bar", &BVAR (current_buffer
, vertical_scroll_bar_type
),
5710 doc
: /* *Position of this buffer's vertical scroll bar.
5711 The value takes effect whenever you tell a window to display this buffer;
5712 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5714 A value of `left' or `right' means put the vertical scroll bar at that side
5715 of the window; a value of nil means don't show any vertical scroll bars.
5716 A value of t (the default) means do whatever the window's frame specifies. */);
5718 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5719 &BVAR (current_buffer
, indicate_empty_lines
), Qnil
,
5720 doc
: /* *Visually indicate empty lines after the buffer end.
5721 If non-nil, a bitmap is displayed in the left fringe of a window on
5722 window-systems. */);
5724 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5725 &BVAR (current_buffer
, indicate_buffer_boundaries
), Qnil
,
5726 doc
: /* *Visually indicate buffer boundaries and scrolling.
5727 If non-nil, the first and last line of the buffer are marked in the fringe
5728 of a window on window-systems with angle bitmaps, or if the window can be
5729 scrolled, the top and bottom line of the window are marked with up and down
5732 If value is a symbol `left' or `right', both angle and arrow bitmaps
5733 are displayed in the left or right fringe, resp. Any other value
5734 that doesn't look like an alist means display the angle bitmaps in
5735 the left fringe but no arrows.
5737 You can exercise more precise control by using an alist as the
5738 value. Each alist element (INDICATOR . POSITION) specifies
5739 where to show one of the indicators. INDICATOR is one of `top',
5740 `bottom', `up', `down', or t, which specifies the default position,
5741 and POSITION is one of `left', `right', or nil, meaning do not show
5744 For example, ((top . left) (t . right)) places the top angle bitmap in
5745 left fringe, the bottom angle bitmap in right fringe, and both arrow
5746 bitmaps in right fringe. To show just the angle bitmaps in the left
5747 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5749 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5750 &BVAR (current_buffer
, fringe_indicator_alist
), Qnil
,
5751 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5752 The value is an alist where each element (INDICATOR . BITMAPS)
5753 specifies the fringe bitmaps used to display a specific logical
5756 INDICATOR specifies the logical indicator type which is one of the
5757 following symbols: `truncation' , `continuation', `overlay-arrow',
5758 `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'.
5760 BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5761 the actual bitmap shown in the left or right fringe for the logical
5762 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5763 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5764 are used only for the `bottom' and `top-bottom' indicators when the
5765 last (only) line has no final newline. BITMAPS may also be a single
5766 symbol which is used in both left and right fringes. */);
5768 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5769 &BVAR (current_buffer
, fringe_cursor_alist
), Qnil
,
5770 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5771 The value is an alist where each element (CURSOR . BITMAP)
5772 specifies the fringe bitmaps used to display a specific logical
5773 cursor type in the fringe.
5775 CURSOR specifies the logical cursor type which is one of the following
5776 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5777 one is used to show a hollow cursor on narrow lines display lines
5778 where the normal hollow cursor will not fit.
5780 BITMAP is the corresponding fringe bitmap shown for the logical
5783 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5784 &BVAR (current_buffer
, scroll_up_aggressively
), Qnil
,
5785 doc
: /* How far to scroll windows upward.
5786 If you move point off the bottom, the window scrolls automatically.
5787 This variable controls how far it scrolls. The value nil, the default,
5788 means scroll to center point. A fraction means scroll to put point
5789 that fraction of the window's height from the bottom of the window.
5790 When the value is 0.0, point goes at the bottom line, which in the
5791 simple case that you moved off with C-f means scrolling just one line.
5792 1.0 means point goes at the top, so that in that simple case, the
5793 window scrolls by a full window height. Meaningful values are
5794 between 0.0 and 1.0, inclusive. */);
5796 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5797 &BVAR (current_buffer
, scroll_down_aggressively
), Qnil
,
5798 doc
: /* How far to scroll windows downward.
5799 If you move point off the top, the window scrolls automatically.
5800 This variable controls how far it scrolls. The value nil, the default,
5801 means scroll to center point. A fraction means scroll to put point
5802 that fraction of the window's height from the top of the window.
5803 When the value is 0.0, point goes at the top line, which in the
5804 simple case that you moved off with C-b means scrolling just one line.
5805 1.0 means point goes at the bottom, so that in that simple case, the
5806 window scrolls by a full window height. Meaningful values are
5807 between 0.0 and 1.0, inclusive. */);
5809 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5813 DEFVAR_LISP ("before-change-functions", Vbefore_change_functions
,
5814 doc
: /* List of functions to call before each text change.
5815 Two arguments are passed to each function: the positions of
5816 the beginning and end of the range of old text to be changed.
5817 \(For an insertion, the beginning and end are at the same place.)
5818 No information is given about the length of the text after the change.
5820 Buffer changes made while executing the `before-change-functions'
5821 don't call any before-change or after-change functions.
5822 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5824 If an unhandled error happens in running these functions,
5825 the variable's value remains nil. That prevents the error
5826 from happening repeatedly and making Emacs nonfunctional. */);
5827 Vbefore_change_functions
= Qnil
;
5829 DEFVAR_LISP ("after-change-functions", Vafter_change_functions
,
5830 doc
: /* List of functions to call after each text change.
5831 Three arguments are passed to each function: the positions of
5832 the beginning and end of the range of changed text,
5833 and the length in bytes of the pre-change text replaced by that range.
5834 \(For an insertion, the pre-change length is zero;
5835 for a deletion, that length is the number of bytes deleted,
5836 and the post-change beginning and end are at the same place.)
5838 Buffer changes made while executing the `after-change-functions'
5839 don't call any before-change or after-change functions.
5840 That's because `inhibit-modification-hooks' is temporarily set non-nil.
5842 If an unhandled error happens in running these functions,
5843 the variable's value remains nil. That prevents the error
5844 from happening repeatedly and making Emacs nonfunctional. */);
5845 Vafter_change_functions
= Qnil
;
5847 DEFVAR_LISP ("first-change-hook", Vfirst_change_hook
,
5848 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5849 The functions are run using the `run-hooks' function. */);
5850 Vfirst_change_hook
= Qnil
;
5852 DEFVAR_PER_BUFFER ("buffer-undo-list", &BVAR (current_buffer
, undo_list
), Qnil
,
5853 doc
: /* List of undo entries in current buffer.
5854 Recent changes come first; older changes follow newer.
5856 An entry (BEG . END) represents an insertion which begins at
5857 position BEG and ends at position END.
5859 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5860 from (abs POSITION). If POSITION is positive, point was at the front
5861 of the text being deleted; if negative, point was at the end.
5863 An entry (t HIGH . LOW) indicates that the buffer previously had
5864 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5865 of the visited file's modification time, as of that time. If the
5866 modification time of the most recent save is different, this entry is
5869 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5870 was modified between BEG and END. PROPERTY is the property name,
5871 and VALUE is the old value.
5873 An entry (apply FUN-NAME . ARGS) means undo the change with
5874 \(apply FUN-NAME ARGS).
5876 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5877 in the active region. BEG and END is the range affected by this entry
5878 and DELTA is the number of bytes added or deleted in that range by
5881 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5882 was adjusted in position by the offset DISTANCE (an integer).
5884 An entry of the form POSITION indicates that point was at the buffer
5885 location given by the integer. Undoing an entry of this form places
5888 Entries with value `nil' mark undo boundaries. The undo command treats
5889 the changes between two undo boundaries as a single step to be undone.
5891 If the value of the variable is t, undo information is not recorded. */);
5893 DEFVAR_PER_BUFFER ("mark-active", &BVAR (current_buffer
, mark_active
), Qnil
,
5894 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5896 DEFVAR_PER_BUFFER ("cache-long-line-scans", &BVAR (current_buffer
, cache_long_line_scans
), Qnil
,
5897 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5899 Normally, the line-motion functions work by scanning the buffer for
5900 newlines. Columnar operations (like `move-to-column' and
5901 `compute-motion') also work by scanning the buffer, summing character
5902 widths as they go. This works well for ordinary text, but if the
5903 buffer's lines are very long (say, more than 500 characters), these
5904 motion functions will take longer to execute. Emacs may also take
5905 longer to update the display.
5907 If `cache-long-line-scans' is non-nil, these motion functions cache the
5908 results of their scans, and consult the cache to avoid rescanning
5909 regions of the buffer until the text is modified. The caches are most
5910 beneficial when they prevent the most searching---that is, when the
5911 buffer contains long lines and large regions of characters with the
5912 same, fixed screen width.
5914 When `cache-long-line-scans' is non-nil, processing short lines will
5915 become slightly slower (because of the overhead of consulting the
5916 cache), and the caches will use memory roughly proportional to the
5917 number of newlines and characters whose screen width varies.
5919 The caches require no explicit maintenance; their accuracy is
5920 maintained internally by the Emacs primitives. Enabling or disabling
5921 the cache should not affect the behavior of any of the motion
5922 functions; it should only affect their performance. */);
5924 DEFVAR_PER_BUFFER ("point-before-scroll", &BVAR (current_buffer
, point_before_scroll
), Qnil
,
5925 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5927 DEFVAR_PER_BUFFER ("buffer-file-format", &BVAR (current_buffer
, file_format
), Qnil
,
5928 doc
: /* List of formats to use when saving this buffer.
5929 Formats are defined by `format-alist'. This variable is
5930 set when a file is visited. */);
5932 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5933 &BVAR (current_buffer
, auto_save_file_format
), Qnil
,
5934 doc
: /* *Format in which to write auto-save files.
5935 Should be a list of symbols naming formats that are defined in `format-alist'.
5936 If it is t, which is the default, auto-save files are written in the
5937 same format as a regular save would use. */);
5939 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5940 &BVAR (current_buffer
, invisibility_spec
), Qnil
,
5941 doc
: /* Invisibility spec of this buffer.
5942 The default is t, which means that text is invisible
5943 if it has a non-nil `invisible' property.
5944 If the value is a list, a text character is invisible if its `invisible'
5945 property is an element in that list (or is a list with members in common).
5946 If an element is a cons cell of the form (PROP . ELLIPSIS),
5947 then characters with property value PROP are invisible,
5948 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5950 DEFVAR_PER_BUFFER ("buffer-display-count",
5951 &BVAR (current_buffer
, display_count
), Qnil
,
5952 doc
: /* A number incremented each time this buffer is displayed in a window.
5953 The function `set-window-buffer' increments it. */);
5955 DEFVAR_PER_BUFFER ("buffer-display-time",
5956 &BVAR (current_buffer
, display_time
), Qnil
,
5957 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5958 The function `set-window-buffer' updates this variable
5959 to the value obtained by calling `current-time'.
5960 If the buffer has never been shown in a window, the value is nil. */);
5962 DEFVAR_LISP ("transient-mark-mode", Vtransient_mark_mode
,
5963 doc
: /* Non-nil if Transient Mark mode is enabled.
5964 See the command `transient-mark-mode' for a description of this minor mode.
5966 Non-nil also enables highlighting of the region whenever the mark is active.
5967 The variable `highlight-nonselected-windows' controls whether to highlight
5968 all windows or just the selected window.
5970 Lisp programs may give this variable certain special values:
5972 - A value of `lambda' enables Transient Mark mode temporarily.
5973 It is disabled again after any subsequent action that would
5974 normally deactivate the mark (e.g. buffer modification).
5976 - A value of (only . OLDVAL) enables Transient Mark mode
5977 temporarily. After any subsequent point motion command that is
5978 not shift-translated, or any other action that would normally
5979 deactivate the mark (e.g. buffer modification), the value of
5980 `transient-mark-mode' is set to OLDVAL. */);
5981 Vtransient_mark_mode
= Qnil
;
5983 DEFVAR_LISP ("inhibit-read-only", Vinhibit_read_only
,
5984 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5985 If the value is t, disregard `buffer-read-only' and all `read-only'
5986 text properties. If the value is a list, disregard `buffer-read-only'
5987 and disregard a `read-only' text property if the property value
5988 is a member of the list. */);
5989 Vinhibit_read_only
= Qnil
;
5991 DEFVAR_PER_BUFFER ("cursor-type", &BVAR (current_buffer
, cursor_type
), Qnil
,
5992 doc
: /* Cursor to use when this buffer is in the selected window.
5993 Values are interpreted as follows:
5995 t use the cursor specified for the frame
5996 nil don't display a cursor
5997 box display a filled box cursor
5998 hollow display a hollow box cursor
5999 bar display a vertical bar cursor with default width
6000 (bar . WIDTH) display a vertical bar cursor with width WIDTH
6001 hbar display a horizontal bar cursor with default height
6002 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6003 ANYTHING ELSE display a hollow box cursor
6005 When the buffer is displayed in a non-selected window, the
6006 cursor's appearance is instead controlled by the variable
6007 `cursor-in-non-selected-windows'. */);
6009 DEFVAR_PER_BUFFER ("line-spacing",
6010 &BVAR (current_buffer
, extra_line_spacing
), Qnil
,
6011 doc
: /* Additional space to put between lines when displaying a buffer.
6012 The space is measured in pixels, and put below lines on graphic displays,
6013 see `display-graphic-p'.
6014 If value is a floating point number, it specifies the spacing relative
6015 to the default frame line height. A value of nil means add no extra space. */);
6017 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6018 &BVAR (current_buffer
, cursor_in_non_selected_windows
), Qnil
,
6019 doc
: /* *Non-nil means show a cursor in non-selected windows.
6020 If nil, only shows a cursor in the selected window.
6021 If t, displays a cursor related to the usual cursor type
6022 \(a solid box becomes hollow, a bar becomes a narrower bar).
6023 You can also specify the cursor type as in the `cursor-type' variable.
6024 Use Custom to set this variable and update the display." */);
6026 DEFVAR_LISP ("kill-buffer-query-functions", Vkill_buffer_query_functions
,
6027 doc
: /* List of functions called with no args to query before killing a buffer.
6028 The buffer being killed will be current while the functions are running.
6029 If any of them returns nil, the buffer is not killed. */);
6030 Vkill_buffer_query_functions
= Qnil
;
6032 DEFVAR_LISP ("change-major-mode-hook", Vchange_major_mode_hook
,
6033 doc
: /* Normal hook run before changing the major mode of a buffer.
6034 The function `kill-all-local-variables' runs this before doing anything else. */);
6035 Vchange_major_mode_hook
= Qnil
;
6036 Qchange_major_mode_hook
= intern_c_string ("change-major-mode-hook");
6037 staticpro (&Qchange_major_mode_hook
);
6039 DEFVAR_LISP ("buffer-list-update-hook", Vbuffer_list_update_hook
,
6040 doc
: /* Hook run when the buffer list changes.
6041 Functions running this hook are `get-buffer-create',
6042 `make-indirect-buffer', `rename-buffer', `kill-buffer',
6043 `record-buffer' and `unrecord-buffer'. */);
6044 Vbuffer_list_update_hook
= Qnil
;
6045 Qbuffer_list_update_hook
= intern_c_string ("buffer-list-update-hook");
6046 staticpro (&Qbuffer_list_update_hook
);
6048 defsubr (&Sbuffer_live_p
);
6049 defsubr (&Sbuffer_list
);
6050 defsubr (&Sget_buffer
);
6051 defsubr (&Sget_file_buffer
);
6052 defsubr (&Sget_buffer_create
);
6053 defsubr (&Smake_indirect_buffer
);
6054 defsubr (&Sgenerate_new_buffer_name
);
6055 defsubr (&Sbuffer_name
);
6056 /*defsubr (&Sbuffer_number);*/
6057 defsubr (&Sbuffer_file_name
);
6058 defsubr (&Sbuffer_base_buffer
);
6059 defsubr (&Sbuffer_local_value
);
6060 defsubr (&Sbuffer_local_variables
);
6061 defsubr (&Sbuffer_modified_p
);
6062 defsubr (&Sset_buffer_modified_p
);
6063 defsubr (&Sbuffer_modified_tick
);
6064 defsubr (&Sbuffer_chars_modified_tick
);
6065 defsubr (&Srename_buffer
);
6066 defsubr (&Sother_buffer
);
6067 defsubr (&Sbuffer_enable_undo
);
6068 defsubr (&Skill_buffer
);
6069 defsubr (&Srecord_buffer
);
6070 defsubr (&Sunrecord_buffer
);
6071 defsubr (&Sset_buffer_major_mode
);
6072 defsubr (&Scurrent_buffer
);
6073 defsubr (&Sset_buffer
);
6074 defsubr (&Sbarf_if_buffer_read_only
);
6075 defsubr (&Serase_buffer
);
6076 defsubr (&Sbuffer_swap_text
);
6077 defsubr (&Sset_buffer_multibyte
);
6078 defsubr (&Skill_all_local_variables
);
6080 defsubr (&Soverlayp
);
6081 defsubr (&Smake_overlay
);
6082 defsubr (&Sdelete_overlay
);
6083 defsubr (&Smove_overlay
);
6084 defsubr (&Soverlay_start
);
6085 defsubr (&Soverlay_end
);
6086 defsubr (&Soverlay_buffer
);
6087 defsubr (&Soverlay_properties
);
6088 defsubr (&Soverlays_at
);
6089 defsubr (&Soverlays_in
);
6090 defsubr (&Snext_overlay_change
);
6091 defsubr (&Sprevious_overlay_change
);
6092 defsubr (&Soverlay_recenter
);
6093 defsubr (&Soverlay_lists
);
6094 defsubr (&Soverlay_get
);
6095 defsubr (&Soverlay_put
);
6096 defsubr (&Srestore_buffer_modified_p
);
6100 keys_of_buffer (void)
6102 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6103 initial_define_key (control_x_map
, 'k', "kill-buffer");
6105 /* This must not be in syms_of_buffer, because Qdisabled is not
6106 initialized when that function gets called. */
6107 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);