1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994,
3 1995, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 This file is part of GNU Emacs.
9 GNU Emacs is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation, either version 3 of the License, or
12 (at your option) any later version.
14 GNU Emacs is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
26 #include <sys/param.h>
36 #include "intervals.h"
40 #include "character.h"
41 #include "region-cache.h"
43 #include "blockinput.h"
48 struct buffer
*current_buffer
; /* the current buffer */
50 /* First buffer in chain of all buffers (in reverse order of creation).
51 Threaded through ->next. */
53 struct buffer
*all_buffers
;
55 /* This structure holds the default values of the buffer-local variables
56 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
57 The default value occupies the same slot in this structure
58 as an individual buffer's value occupies in that buffer.
59 Setting the default value also goes through the alist of buffers
60 and stores into each buffer that does not say it has a local value. */
62 DECL_ALIGN (struct buffer
, buffer_defaults
);
64 /* A Lisp_Object pointer to the above, used for staticpro */
66 static Lisp_Object Vbuffer_defaults
;
68 /* This structure marks which slots in a buffer have corresponding
69 default values in buffer_defaults.
70 Each such slot has a nonzero value in this structure.
71 The value has only one nonzero bit.
73 When a buffer has its own local value for a slot,
74 the entry for that slot (found in the same slot in this structure)
75 is turned on in the buffer's local_flags array.
77 If a slot in this structure is -1, then even though there may
78 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
79 and the corresponding slot in buffer_defaults is not used.
81 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
82 but there is a default value which is copied into each buffer.
84 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
85 zero, that is a bug */
87 struct buffer buffer_local_flags
;
89 /* This structure holds the names of symbols whose values may be
90 buffer-local. It is indexed and accessed in the same way as the above. */
92 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
94 /* A Lisp_Object pointer to the above, used for staticpro */
95 static Lisp_Object Vbuffer_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 EXFUN (Fset_buffer
, 1);
106 void set_buffer_internal
P_ ((struct buffer
*b
));
107 void set_buffer_internal_1
P_ ((struct buffer
*b
));
108 static void call_overlay_mod_hooks
P_ ((Lisp_Object list
, Lisp_Object overlay
,
109 int after
, Lisp_Object arg1
,
110 Lisp_Object arg2
, Lisp_Object arg3
));
111 static void swap_out_buffer_local_variables
P_ ((struct buffer
*b
));
112 static void reset_buffer_local_variables
P_ ((struct buffer
*b
, int permanent_too
));
114 /* Alist of all buffer names vs the buffers. */
115 /* This used to be a variable, but is no longer,
116 to prevent lossage due to user rplac'ing this alist or its elements. */
117 Lisp_Object Vbuffer_alist
;
119 /* Functions to call before and after each text change. */
120 Lisp_Object Vbefore_change_functions
;
121 Lisp_Object Vafter_change_functions
;
123 Lisp_Object Vtransient_mark_mode
;
125 /* t means ignore all read-only text properties.
126 A list means ignore such a property if its value is a member of the list.
127 Any non-nil value means ignore buffer-read-only. */
128 Lisp_Object Vinhibit_read_only
;
130 /* List of functions to call that can query about killing a buffer.
131 If any of these functions returns nil, we don't kill it. */
132 Lisp_Object Vkill_buffer_query_functions
;
133 Lisp_Object Qkill_buffer_query_functions
;
135 /* Hook run before changing a major mode. */
136 Lisp_Object Vchange_major_mode_hook
, Qchange_major_mode_hook
;
138 /* List of functions to call before changing an unmodified buffer. */
139 Lisp_Object Vfirst_change_hook
;
141 Lisp_Object Qfirst_change_hook
;
142 Lisp_Object Qbefore_change_functions
;
143 Lisp_Object Qafter_change_functions
;
144 Lisp_Object Qucs_set_table_for_input
;
146 /* If nonzero, all modification hooks are suppressed. */
147 int inhibit_modification_hooks
;
149 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
150 Lisp_Object Qpermanent_local_hook
;
152 Lisp_Object Qprotected_field
;
154 Lisp_Object QSFundamental
; /* A string "Fundamental" */
156 Lisp_Object Qkill_buffer_hook
;
158 Lisp_Object Qget_file_buffer
;
160 Lisp_Object Qoverlayp
;
162 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
164 Lisp_Object Qmodification_hooks
;
165 Lisp_Object Qinsert_in_front_hooks
;
166 Lisp_Object Qinsert_behind_hooks
;
168 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
169 static void free_buffer_text
P_ ((struct buffer
*b
));
170 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
171 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
172 static Lisp_Object buffer_lisp_local_variables
P_ ((struct buffer
*));
174 extern char * emacs_strerror
P_ ((int));
176 /* For debugging; temporary. See set_buffer_internal. */
177 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
184 error ("No buffer named %s", SDATA (spec
));
185 error ("Invalid buffer argument");
188 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
189 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
190 Value is nil if OBJECT is not a buffer or if it has been killed. */)
194 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
198 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
199 doc
: /* Return a list of all existing live buffers.
200 If the optional arg FRAME is a frame, we return the buffer list
201 in the proper order for that frame: the buffers in FRAME's `buffer-list'
202 frame parameter come first, followed by the rest of the buffers. */)
207 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
211 Lisp_Object framelist
, prevlist
, tail
;
216 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
217 prevlist
= Fnreverse (Fcopy_sequence (XFRAME (frame
)->buried_buffer_list
));
219 /* Remove from GENERAL any buffer that duplicates one in
220 FRAMELIST or PREVLIST. */
224 general
= Fdelq (XCAR (tail
), general
);
230 general
= Fdelq (XCAR (tail
), general
);
237 return Fnconc (3, args
);
243 /* Like Fassoc, but use Fstring_equal to compare
244 (which ignores text properties),
245 and don't ever QUIT. */
248 assoc_ignore_text_properties (key
, list
)
249 register Lisp_Object key
;
252 register Lisp_Object tail
;
253 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
255 register Lisp_Object elt
, tem
;
257 tem
= Fstring_equal (Fcar (elt
), key
);
264 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
265 doc
: /* Return the buffer named BUFFER-OR-NAME.
266 BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME
267 is a string and there is no buffer with that name, return nil. If
268 BUFFER-OR-NAME is a buffer, return it as given. */)
270 register Lisp_Object buffer_or_name
;
272 if (BUFFERP (buffer_or_name
))
273 return buffer_or_name
;
274 CHECK_STRING (buffer_or_name
);
276 return Fcdr (assoc_ignore_text_properties (buffer_or_name
, Vbuffer_alist
));
279 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
280 doc
: /* Return the buffer visiting file FILENAME (a string).
281 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
282 If there is no such live buffer, return nil.
283 See also `find-buffer-visiting'. */)
285 register Lisp_Object filename
;
287 register Lisp_Object tail
, buf
, tem
;
290 CHECK_STRING (filename
);
291 filename
= Fexpand_file_name (filename
, Qnil
);
293 /* If the file name has special constructs in it,
294 call the corresponding file handler. */
295 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
297 return call2 (handler
, Qget_file_buffer
, filename
);
299 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
301 buf
= Fcdr (XCAR (tail
));
302 if (!BUFFERP (buf
)) continue;
303 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
304 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
312 get_truename_buffer (filename
)
313 register Lisp_Object filename
;
315 register Lisp_Object tail
, buf
, tem
;
317 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
319 buf
= Fcdr (XCAR (tail
));
320 if (!BUFFERP (buf
)) continue;
321 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
322 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
329 /* Incremented for each buffer created, to assign the buffer number. */
332 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
333 doc
: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed.
334 If BUFFER-OR-NAME is a string and a live buffer with that name exists,
335 return that buffer. If no such buffer exists, create a new buffer with
336 that name and return it. If BUFFER-OR-NAME starts with a space, the new
337 buffer does not keep undo information.
339 If BUFFER-OR-NAME is a buffer instead of a string, return it as given,
340 even if it is dead. The return value is never nil. */)
342 register Lisp_Object buffer_or_name
;
344 register Lisp_Object buffer
, name
;
345 register struct buffer
*b
;
347 buffer
= Fget_buffer (buffer_or_name
);
351 if (SCHARS (buffer_or_name
) == 0)
352 error ("Empty string for buffer name is not allowed");
354 b
= allocate_buffer ();
356 /* An ordinary buffer uses its own struct buffer_text. */
357 b
->text
= &b
->own_text
;
360 BUF_GAP_SIZE (b
) = 20;
362 /* We allocate extra 1-byte at the tail and keep it always '\0' for
363 anchoring a search. */
364 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
366 if (! BUF_BEG_ADDR (b
))
367 buffer_memory_full ();
374 BUF_PT_BYTE (b
) = BEG_BYTE
;
375 BUF_GPT_BYTE (b
) = BEG_BYTE
;
376 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
377 BUF_ZV_BYTE (b
) = BEG_BYTE
;
378 BUF_Z_BYTE (b
) = BEG_BYTE
;
380 BUF_CHARS_MODIFF (b
) = 1;
381 BUF_OVERLAY_MODIFF (b
) = 1;
382 BUF_SAVE_MODIFF (b
) = 1;
383 BUF_INTERVALS (b
) = 0;
384 BUF_UNCHANGED_MODIFIED (b
) = 1;
385 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
386 BUF_END_UNCHANGED (b
) = 0;
387 BUF_BEG_UNCHANGED (b
) = 0;
388 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
390 b
->newline_cache
= 0;
391 b
->width_run_cache
= 0;
392 b
->width_table
= Qnil
;
393 b
->prevent_redisplay_optimizations_p
= 1;
395 /* Put this on the chain of all buffers including killed ones. */
396 b
->next
= all_buffers
;
399 /* An ordinary buffer normally doesn't need markers
400 to handle BEGV and ZV. */
402 b
->begv_marker
= Qnil
;
405 name
= Fcopy_sequence (buffer_or_name
);
406 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
409 b
->undo_list
= (SREF (name
, 0) != ' ') ? Qnil
: Qt
;
412 reset_buffer_local_variables (b
, 1);
414 b
->mark
= Fmake_marker ();
415 BUF_MARKERS (b
) = NULL
;
418 /* Put this in the alist of all live buffers. */
419 XSETBUFFER (buffer
, b
);
420 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buffer
), Qnil
));
422 /* An error in calling the function here (should someone redefine it)
423 can lead to infinite regress until you run out of stack. rms
424 says that's not worth protecting against. */
425 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
426 /* buffer is on buffer-alist, so no gcpro. */
427 call1 (Qucs_set_table_for_input
, buffer
);
433 /* Return a list of overlays which is a copy of the overlay list
434 LIST, but for buffer B. */
436 static struct Lisp_Overlay
*
437 copy_overlays (b
, list
)
439 struct Lisp_Overlay
*list
;
442 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
444 XSETBUFFER (buffer
, b
);
446 for (; list
; list
= list
->next
)
448 Lisp_Object overlay
, start
, end
, old_overlay
;
451 XSETMISC (old_overlay
, list
);
452 charpos
= marker_position (OVERLAY_START (old_overlay
));
453 start
= Fmake_marker ();
454 Fset_marker (start
, make_number (charpos
), buffer
);
455 XMARKER (start
)->insertion_type
456 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
458 charpos
= marker_position (OVERLAY_END (old_overlay
));
459 end
= Fmake_marker ();
460 Fset_marker (end
, make_number (charpos
), buffer
);
461 XMARKER (end
)->insertion_type
462 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
464 overlay
= allocate_misc ();
465 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
466 OVERLAY_START (overlay
) = start
;
467 OVERLAY_END (overlay
) = end
;
468 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
469 XOVERLAY (overlay
)->next
= NULL
;
472 tail
= tail
->next
= XOVERLAY (overlay
);
474 result
= tail
= XOVERLAY (overlay
);
481 /* Clone per-buffer values of buffer FROM.
483 Buffer TO gets the same per-buffer values as FROM, with the
484 following exceptions: (1) TO's name is left untouched, (2) markers
485 are copied and made to refer to TO, and (3) overlay lists are
489 clone_per_buffer_values (from
, to
)
490 struct buffer
*from
, *to
;
492 Lisp_Object to_buffer
;
495 XSETBUFFER (to_buffer
, to
);
497 /* buffer-local Lisp variables start at `undo_list',
498 tho only the ones from `name' on are GC'd normally. */
499 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
501 offset
+= sizeof (Lisp_Object
))
505 /* Don't touch the `name' which should be unique for every buffer. */
506 if (offset
== PER_BUFFER_VAR_OFFSET (name
))
509 obj
= PER_BUFFER_VALUE (from
, offset
);
512 struct Lisp_Marker
*m
= XMARKER (obj
);
513 obj
= Fmake_marker ();
514 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
515 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
518 PER_BUFFER_VALUE (to
, offset
) = obj
;
521 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
523 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
524 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
526 /* Get (a copy of) the alist of Lisp-level local variables of FROM
527 and install that in TO. */
528 to
->local_var_alist
= buffer_lisp_local_variables (from
);
531 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
533 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
534 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
535 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
536 NAME should be a string which is not the name of an existing buffer.
537 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
538 such as major and minor modes, in the indirect buffer.
539 CLONE nil means the indirect buffer's state is reset to default values. */)
540 (base_buffer
, name
, clone
)
541 Lisp_Object base_buffer
, name
, clone
;
543 Lisp_Object buf
, tem
;
547 buf
= Fget_buffer (name
);
549 error ("Buffer name `%s' is in use", SDATA (name
));
552 base_buffer
= Fget_buffer (base_buffer
);
553 if (NILP (base_buffer
))
554 error ("No such buffer: `%s'", SDATA (tem
));
555 if (NILP (XBUFFER (base_buffer
)->name
))
556 error ("Base buffer has been killed");
558 if (SCHARS (name
) == 0)
559 error ("Empty string for buffer name is not allowed");
561 b
= allocate_buffer ();
563 b
->base_buffer
= (XBUFFER (base_buffer
)->base_buffer
564 ? XBUFFER (base_buffer
)->base_buffer
565 : XBUFFER (base_buffer
));
567 /* Use the base buffer's text object. */
568 b
->text
= b
->base_buffer
->text
;
570 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
571 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
572 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
573 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
574 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
575 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
577 b
->newline_cache
= 0;
578 b
->width_run_cache
= 0;
579 b
->width_table
= Qnil
;
581 /* Put this on the chain of all buffers including killed ones. */
582 b
->next
= all_buffers
;
585 name
= Fcopy_sequence (name
);
586 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
590 reset_buffer_local_variables (b
, 1);
592 /* Put this in the alist of all live buffers. */
594 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
596 b
->mark
= Fmake_marker ();
599 /* The multibyte status belongs to the base buffer. */
600 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
602 /* Make sure the base buffer has markers for its narrowing. */
603 if (NILP (b
->base_buffer
->pt_marker
))
605 b
->base_buffer
->pt_marker
= Fmake_marker ();
606 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
607 BUF_PT (b
->base_buffer
),
608 BUF_PT_BYTE (b
->base_buffer
));
610 if (NILP (b
->base_buffer
->begv_marker
))
612 b
->base_buffer
->begv_marker
= Fmake_marker ();
613 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
614 BUF_BEGV (b
->base_buffer
),
615 BUF_BEGV_BYTE (b
->base_buffer
));
617 if (NILP (b
->base_buffer
->zv_marker
))
619 b
->base_buffer
->zv_marker
= Fmake_marker ();
620 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
621 BUF_ZV (b
->base_buffer
),
622 BUF_ZV_BYTE (b
->base_buffer
));
623 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
628 /* Give the indirect buffer markers for its narrowing. */
629 b
->pt_marker
= Fmake_marker ();
630 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
631 b
->begv_marker
= Fmake_marker ();
632 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
633 b
->zv_marker
= Fmake_marker ();
634 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
635 XMARKER (b
->zv_marker
)->insertion_type
= 1;
639 struct buffer
*old_b
= current_buffer
;
641 clone_per_buffer_values (b
->base_buffer
, b
);
643 b
->file_truename
= Qnil
;
644 b
->display_count
= make_number (0);
646 b
->auto_save_file_name
= Qnil
;
647 set_buffer_internal_1 (b
);
648 Fset (intern ("buffer-save-without-query"), Qnil
);
649 Fset (intern ("buffer-file-number"), Qnil
);
650 Fset (intern ("buffer-stale-function"), Qnil
);
651 set_buffer_internal_1 (old_b
);
658 delete_all_overlays (b
)
663 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
664 have to empty the list, otherwise we end up with overlays that
665 think they belong to this buffer while the buffer doesn't know about
667 while (b
->overlays_before
)
669 XSETMISC (overlay
, b
->overlays_before
);
670 Fdelete_overlay (overlay
);
672 while (b
->overlays_after
)
674 XSETMISC (overlay
, b
->overlays_after
);
675 Fdelete_overlay (overlay
);
677 eassert (b
->overlays_before
== NULL
);
678 eassert (b
->overlays_after
== NULL
);
681 /* Reinitialize everything about a buffer except its name and contents
683 If called on an already-initialized buffer, the list of overlays
684 should be deleted before calling this function, otherwise we end up
685 with overlays that claim to belong to the buffer but the buffer
686 claims it doesn't belong to it. */
690 register struct buffer
*b
;
693 b
->file_truename
= Qnil
;
694 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
696 b
->modtime_size
= -1;
697 XSETFASTINT (b
->save_length
, 0);
698 b
->last_window_start
= 1;
699 /* It is more conservative to start out "changed" than "unchanged". */
701 b
->prevent_redisplay_optimizations_p
= 1;
703 BUF_AUTOSAVE_MODIFF (b
) = 0;
704 b
->auto_save_failure_time
= -1;
705 b
->auto_save_file_name
= Qnil
;
707 b
->overlays_before
= NULL
;
708 b
->overlays_after
= NULL
;
709 b
->overlay_center
= BEG
;
710 b
->mark_active
= Qnil
;
711 b
->point_before_scroll
= Qnil
;
712 b
->file_format
= Qnil
;
713 b
->auto_save_file_format
= Qt
;
714 b
->last_selected_window
= Qnil
;
715 XSETINT (b
->display_count
, 0);
716 b
->display_time
= Qnil
;
717 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
718 b
->cursor_type
= buffer_defaults
.cursor_type
;
719 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
721 b
->display_error_modiff
= 0;
724 /* Reset buffer B's local variables info.
725 Don't use this on a buffer that has already been in use;
726 it does not treat permanent locals consistently.
727 Instead, use Fkill_all_local_variables.
729 If PERMANENT_TOO is 1, then we reset permanent
730 buffer-local variables. If PERMANENT_TOO is 0,
731 we preserve those. */
734 reset_buffer_local_variables (b
, permanent_too
)
735 register struct buffer
*b
;
741 /* Reset the major mode to Fundamental, together with all the
742 things that depend on the major mode.
743 default-major-mode is handled at a higher level.
744 We ignore it here. */
745 b
->major_mode
= Qfundamental_mode
;
747 b
->mode_name
= QSFundamental
;
748 b
->minor_modes
= Qnil
;
750 /* If the standard case table has been altered and invalidated,
751 fix up its insides first. */
752 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
753 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
754 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
755 Fset_standard_case_table (Vascii_downcase_table
);
757 b
->downcase_table
= Vascii_downcase_table
;
758 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
759 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
760 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
761 b
->invisibility_spec
= Qt
;
763 b
->buffer_file_type
= Qnil
;
766 /* Reset all (or most) per-buffer variables to their defaults. */
768 b
->local_var_alist
= Qnil
;
771 Lisp_Object tmp
, prop
, last
= Qnil
;
772 for (tmp
= b
->local_var_alist
; CONSP (tmp
); tmp
= XCDR (tmp
))
773 if (CONSP (XCAR (tmp
))
774 && SYMBOLP (XCAR (XCAR (tmp
)))
775 && !NILP (prop
= Fget (XCAR (XCAR (tmp
)), Qpermanent_local
)))
777 /* If permanent-local, keep it. */
779 if (EQ (prop
, Qpermanent_local_hook
))
781 /* This is a partially permanent hook variable.
782 Preserve only the elements that want to be preserved. */
783 Lisp_Object list
, newlist
;
784 list
= XCDR (XCAR (tmp
));
788 for (newlist
= Qnil
; CONSP (list
); list
= XCDR (list
))
790 Lisp_Object elt
= XCAR (list
);
791 /* Preserve element ELT if it's t,
792 if it is a function with a `permanent-local-hook' property,
793 or if it's not a symbol. */
796 || !NILP (Fget (elt
, Qpermanent_local_hook
)))
797 newlist
= Fcons (elt
, newlist
);
799 XSETCDR (XCAR (tmp
), Fnreverse (newlist
));
802 /* Delete this local variable. */
803 else if (NILP (last
))
804 b
->local_var_alist
= XCDR (tmp
);
806 XSETCDR (last
, XCDR (tmp
));
809 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
810 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
811 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
813 /* For each slot that has a default value,
814 copy that into the slot. */
816 /* buffer-local Lisp variables start at `undo_list',
817 tho only the ones from `name' on are GC'd normally. */
818 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
820 offset
+= sizeof (Lisp_Object
))
822 int idx
= PER_BUFFER_IDX (offset
);
825 || buffer_permanent_local_flags
[idx
] == 0))
826 /* Is -2 used anywhere? */
828 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
832 /* We split this away from generate-new-buffer, because rename-buffer
833 and set-visited-file-name ought to be able to use this to really
834 rename the buffer properly. */
836 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
838 doc
: /* Return a string that is the name of no existing buffer based on NAME.
839 If there is no live buffer named NAME, then return NAME.
840 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
841 \(starting at 2) until an unused name is found, and then return that name.
842 Optional second argument IGNORE specifies a name that is okay to use (if
843 it is in the sequence to be tried) even if a buffer with that name exists. */)
845 register Lisp_Object name
, ignore
;
847 register Lisp_Object gentemp
, tem
;
853 tem
= Fstring_equal (name
, ignore
);
856 tem
= Fget_buffer (name
);
863 sprintf (number
, "<%d>", ++count
);
864 gentemp
= concat2 (name
, build_string (number
));
865 tem
= Fstring_equal (gentemp
, ignore
);
868 tem
= Fget_buffer (gentemp
);
875 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
876 doc
: /* Return the name of BUFFER, as a string.
877 BUFFER defaults to the current buffer.
878 Return nil if BUFFER has been killed. */)
880 register Lisp_Object buffer
;
883 return current_buffer
->name
;
884 CHECK_BUFFER (buffer
);
885 return XBUFFER (buffer
)->name
;
888 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
889 doc
: /* Return name of file BUFFER is visiting, or nil if none.
890 No argument or nil as argument means use the current buffer. */)
892 register Lisp_Object buffer
;
895 return current_buffer
->filename
;
896 CHECK_BUFFER (buffer
);
897 return XBUFFER (buffer
)->filename
;
900 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
902 doc
: /* Return the base buffer of indirect buffer BUFFER.
903 If BUFFER is not indirect, return nil.
904 BUFFER defaults to the current buffer. */)
906 register Lisp_Object buffer
;
909 Lisp_Object base_buffer
;
912 base
= current_buffer
->base_buffer
;
915 CHECK_BUFFER (buffer
);
916 base
= XBUFFER (buffer
)->base_buffer
;
921 XSETBUFFER (base_buffer
, base
);
925 DEFUN ("buffer-local-value", Fbuffer_local_value
,
926 Sbuffer_local_value
, 2, 2, 0,
927 doc
: /* Return the value of VARIABLE in BUFFER.
928 If VARIABLE does not have a buffer-local binding in BUFFER, the value
929 is the default binding of the variable. */)
931 register Lisp_Object variable
;
932 register Lisp_Object buffer
;
934 register struct buffer
*buf
;
935 register Lisp_Object result
;
936 struct Lisp_Symbol
*sym
;
938 CHECK_SYMBOL (variable
);
939 CHECK_BUFFER (buffer
);
940 buf
= XBUFFER (buffer
);
942 sym
= indirect_variable (XSYMBOL (variable
));
943 XSETSYMBOL (variable
, sym
);
945 /* Look in local_var_list */
946 result
= Fassoc (variable
, buf
->local_var_alist
);
952 /* Look in special slots */
953 /* buffer-local Lisp variables start at `undo_list',
954 tho only the ones from `name' on are GC'd normally. */
955 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
956 offset
< sizeof (struct buffer
);
957 /* sizeof EMACS_INT == sizeof Lisp_Object */
958 offset
+= (sizeof (EMACS_INT
)))
960 idx
= PER_BUFFER_IDX (offset
);
961 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
962 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
963 && EQ (PER_BUFFER_SYMBOL (offset
), variable
))
965 result
= PER_BUFFER_VALUE (buf
, offset
);
972 result
= Fdefault_value (variable
);
976 Lisp_Object valcontents
;
977 Lisp_Object current_alist_element
;
979 /* What binding is loaded right now? */
980 valcontents
= sym
->value
;
981 current_alist_element
982 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
984 /* The value of the currently loaded binding is not
985 stored in it, but rather in the realvalue slot.
986 Store that value into the binding it belongs to
987 in case that is the one we are about to use. */
989 Fsetcdr (current_alist_element
,
990 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
992 /* Now get the (perhaps updated) value out of the binding. */
993 result
= XCDR (result
);
996 if (!EQ (result
, Qunbound
))
999 xsignal1 (Qvoid_variable
, variable
);
1002 /* Return an alist of the Lisp-level buffer-local bindings of
1003 buffer BUF. That is, don't include the variables maintained
1004 in special slots in the buffer object. */
1007 buffer_lisp_local_variables (buf
)
1010 Lisp_Object result
= Qnil
;
1011 register Lisp_Object tail
;
1012 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1014 Lisp_Object val
, elt
;
1018 /* Reference each variable in the alist in buf.
1019 If inquiring about the current buffer, this gets the current values,
1020 so store them into the alist so the alist is up to date.
1021 If inquiring about some other buffer, this swaps out any values
1022 for that buffer, making the alist up to date automatically. */
1023 val
= find_symbol_value (XCAR (elt
));
1024 /* Use the current buffer value only if buf is the current buffer. */
1025 if (buf
!= current_buffer
)
1028 /* If symbol is unbound, put just the symbol in the list. */
1029 if (EQ (val
, Qunbound
))
1030 result
= Fcons (XCAR (elt
), result
);
1031 /* Otherwise, put (symbol . value) in the list. */
1033 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
1039 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
1040 Sbuffer_local_variables
, 0, 1, 0,
1041 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
1042 Most elements look like (SYMBOL . VALUE), describing one variable.
1043 For a symbol that is locally unbound, just the symbol appears in the value.
1044 Note that storing new VALUEs in these elements doesn't change the variables.
1045 No argument or nil as argument means use current buffer as BUFFER. */)
1047 register Lisp_Object buffer
;
1049 register struct buffer
*buf
;
1050 register Lisp_Object result
;
1053 buf
= current_buffer
;
1056 CHECK_BUFFER (buffer
);
1057 buf
= XBUFFER (buffer
);
1060 result
= buffer_lisp_local_variables (buf
);
1062 /* Add on all the variables stored in special slots. */
1066 /* buffer-local Lisp variables start at `undo_list',
1067 tho only the ones from `name' on are GC'd normally. */
1068 for (offset
= PER_BUFFER_VAR_OFFSET (undo_list
);
1069 offset
< sizeof (struct buffer
);
1070 /* sizeof EMACS_INT == sizeof Lisp_Object */
1071 offset
+= (sizeof (EMACS_INT
)))
1073 idx
= PER_BUFFER_IDX (offset
);
1074 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1075 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1076 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1077 PER_BUFFER_VALUE (buf
, offset
)),
1085 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1087 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1088 No argument or nil as argument means use current buffer as BUFFER. */)
1090 register Lisp_Object buffer
;
1092 register struct buffer
*buf
;
1094 buf
= current_buffer
;
1097 CHECK_BUFFER (buffer
);
1098 buf
= XBUFFER (buffer
);
1101 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1104 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1106 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1107 A non-nil FLAG means mark the buffer modified. */)
1109 register Lisp_Object flag
;
1111 register int already
;
1112 register Lisp_Object fn
;
1113 Lisp_Object buffer
, window
;
1115 #ifdef CLASH_DETECTION
1116 /* If buffer becoming modified, lock the file.
1117 If buffer becoming unmodified, unlock the file. */
1119 fn
= current_buffer
->file_truename
;
1120 /* Test buffer-file-name so that binding it to nil is effective. */
1121 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1123 already
= SAVE_MODIFF
< MODIFF
;
1124 if (!already
&& !NILP (flag
))
1126 else if (already
&& NILP (flag
))
1129 #endif /* CLASH_DETECTION */
1131 /* Here we have a problem. SAVE_MODIFF is used here to encode
1132 buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as
1133 recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we
1134 modify SAVE_MODIFF to affect one, we may affect the other
1136 E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but
1137 if SAVE_MODIFF<auto_save_modified that means we risk changing
1138 recent-auto-save-p from t to nil.
1139 Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified
1140 we risk changing recent-auto-save-p from nil to t. */
1141 SAVE_MODIFF
= (NILP (flag
)
1142 /* FIXME: This unavoidably sets recent-auto-save-p to nil. */
1144 /* Let's try to preserve recent-auto-save-p. */
1145 : SAVE_MODIFF
< MODIFF
? SAVE_MODIFF
1146 /* If SAVE_MODIFF == auto_save_modified == MODIFF,
1147 we can either decrease SAVE_MODIFF and auto_save_modified
1148 or increase MODIFF. */
1151 /* Set update_mode_lines only if buffer is displayed in some window.
1152 Packages like jit-lock or lazy-lock preserve a buffer's modified
1153 state by recording/restoring the state around blocks of code.
1154 Setting update_mode_lines makes redisplay consider all windows
1155 (on all frames). Stealth fontification of buffers not displayed
1156 would incur additional redisplay costs if we'd set
1157 update_modes_lines unconditionally.
1159 Ideally, I think there should be another mechanism for fontifying
1160 buffers without "modifying" buffers, or redisplay should be
1161 smarter about updating the `*' in mode lines. --gerd */
1162 XSETBUFFER (buffer
, current_buffer
);
1163 window
= Fget_buffer_window (buffer
, Qt
);
1164 if (WINDOWP (window
))
1166 ++update_mode_lines
;
1167 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1173 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1174 Srestore_buffer_modified_p
, 1, 1, 0,
1175 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1176 It is not ensured that mode lines will be updated to show the modified
1177 state of the current buffer. Use with care. */)
1181 #ifdef CLASH_DETECTION
1184 /* If buffer becoming modified, lock the file.
1185 If buffer becoming unmodified, unlock the file. */
1187 fn
= current_buffer
->file_truename
;
1188 /* Test buffer-file-name so that binding it to nil is effective. */
1189 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1191 int already
= SAVE_MODIFF
< MODIFF
;
1192 if (!already
&& !NILP (flag
))
1194 else if (already
&& NILP (flag
))
1197 #endif /* CLASH_DETECTION */
1199 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1203 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1205 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1206 Each buffer has a tick counter which is incremented each time the
1207 text in that buffer is changed. It wraps around occasionally.
1208 No argument or nil as argument means use current buffer as BUFFER. */)
1210 register Lisp_Object buffer
;
1212 register struct buffer
*buf
;
1214 buf
= current_buffer
;
1217 CHECK_BUFFER (buffer
);
1218 buf
= XBUFFER (buffer
);
1221 return make_number (BUF_MODIFF (buf
));
1224 DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick
,
1225 Sbuffer_chars_modified_tick
, 0, 1, 0,
1226 doc
: /* Return BUFFER's character-change tick counter.
1227 Each buffer has a character-change tick counter, which is set to the
1228 value of the buffer's tick counter \(see `buffer-modified-tick'), each
1229 time text in that buffer is inserted or deleted. By comparing the
1230 values returned by two individual calls of `buffer-chars-modified-tick',
1231 you can tell whether a character change occurred in that buffer in
1232 between these calls. No argument or nil as argument means use current
1233 buffer as BUFFER. */)
1235 register Lisp_Object buffer
;
1237 register struct buffer
*buf
;
1239 buf
= current_buffer
;
1242 CHECK_BUFFER (buffer
);
1243 buf
= XBUFFER (buffer
);
1246 return make_number (BUF_CHARS_MODIFF (buf
));
1249 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1250 "(list (read-string \"Rename buffer (to new name): \" \
1251 nil 'buffer-name-history (buffer-name (current-buffer))) \
1252 current-prefix-arg)",
1253 doc
: /* Change current buffer's name to NEWNAME (a string).
1254 If second arg UNIQUE is nil or omitted, it is an error if a
1255 buffer named NEWNAME already exists.
1256 If UNIQUE is non-nil, come up with a new name using
1257 `generate-new-buffer-name'.
1258 Interactively, you can set UNIQUE with a prefix argument.
1259 We return the name we actually gave the buffer.
1260 This does not change the name of the visited file (if any). */)
1262 register Lisp_Object newname
, unique
;
1264 register Lisp_Object tem
, buf
;
1266 CHECK_STRING (newname
);
1268 if (SCHARS (newname
) == 0)
1269 error ("Empty string is invalid as a buffer name");
1271 tem
= Fget_buffer (newname
);
1274 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1275 rename the buffer automatically so you can create another
1276 with the original name. It makes UNIQUE equivalent to
1277 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1278 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1279 return current_buffer
->name
;
1281 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1283 error ("Buffer name `%s' is in use", SDATA (newname
));
1286 current_buffer
->name
= newname
;
1288 /* Catch redisplay's attention. Unless we do this, the mode lines for
1289 any windows displaying current_buffer will stay unchanged. */
1290 update_mode_lines
++;
1292 XSETBUFFER (buf
, current_buffer
);
1293 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1294 if (NILP (current_buffer
->filename
)
1295 && !NILP (current_buffer
->auto_save_file_name
))
1296 call0 (intern ("rename-auto-save-file"));
1297 /* Refetch since that last call may have done GC. */
1298 return current_buffer
->name
;
1301 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1302 doc
: /* Return most recently selected buffer other than BUFFER.
1303 Buffers not visible in windows are preferred to visible buffers,
1304 unless optional second argument VISIBLE-OK is non-nil.
1305 If the optional third argument FRAME is non-nil, use that frame's
1306 buffer list instead of the selected frame's buffer list.
1307 If no other buffer exists, the buffer `*scratch*' is returned.
1308 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1309 (buffer
, visible_ok
, frame
)
1310 register Lisp_Object buffer
, visible_ok
, frame
;
1312 Lisp_Object
Fset_buffer_major_mode ();
1313 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1317 frame
= selected_frame
;
1319 tail
= Vbuffer_alist
;
1320 pred
= frame_buffer_predicate (frame
);
1322 /* Consider buffers that have been seen in the selected frame
1323 before other buffers. */
1325 tem
= frame_buffer_list (frame
);
1329 if (BUFFERP (XCAR (tem
)))
1330 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1333 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1335 for (; CONSP (tail
); tail
= XCDR (tail
))
1337 buf
= Fcdr (XCAR (tail
));
1338 if (EQ (buf
, buffer
))
1342 if (NILP (XBUFFER (buf
)->name
))
1344 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1346 /* If the selected frame has a buffer_predicate,
1347 disregard buffers that don't fit the predicate. */
1350 tem
= call1 (pred
, buf
);
1355 if (NILP (visible_ok
))
1356 tem
= Fget_buffer_window (buf
, Qvisible
);
1361 if (NILP (notsogood
))
1364 if (!NILP (notsogood
))
1366 buf
= Fget_buffer (build_string ("*scratch*"));
1369 buf
= Fget_buffer_create (build_string ("*scratch*"));
1370 Fset_buffer_major_mode (buf
);
1375 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1377 doc
: /* Start keeping undo information for buffer BUFFER.
1378 No argument or nil as argument means do this for the current buffer. */)
1380 register Lisp_Object buffer
;
1382 Lisp_Object real_buffer
;
1385 XSETBUFFER (real_buffer
, current_buffer
);
1388 real_buffer
= Fget_buffer (buffer
);
1389 if (NILP (real_buffer
))
1393 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1394 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1400 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1401 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1402 The buffer being killed will be current while the hook is running.\n\
1405 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 0, 1, "bKill buffer: ",
1406 doc
: /* Kill buffer BUFFER-OR-NAME.
1407 The argument may be a buffer or the name of an existing buffer.
1408 Argument nil or omitted means kill the current buffer. Return t if the
1409 buffer is actually killed, nil otherwise.
1411 This function calls `replace-buffer-in-windows' for cleaning up all
1412 windows currently displaying the buffer to be killed. The functions in
1413 `kill-buffer-query-functions' are called with the buffer to be killed as
1414 the current buffer. If any of them returns nil, the buffer is not
1415 killed. The hook `kill-buffer-hook' is run before the buffer is
1416 actually killed. The buffer being killed will be current while the hook
1419 Any processes that have this buffer as the `process-buffer' are killed
1422 Lisp_Object buffer_or_name
;
1425 register struct buffer
*b
;
1426 register Lisp_Object tem
;
1427 register struct Lisp_Marker
*m
;
1428 struct gcpro gcpro1
;
1430 if (NILP (buffer_or_name
))
1431 buffer
= Fcurrent_buffer ();
1433 buffer
= Fget_buffer (buffer_or_name
);
1435 nsberror (buffer_or_name
);
1437 b
= XBUFFER (buffer
);
1439 /* Avoid trouble for buffer already dead. */
1443 /* Query if the buffer is still modified. */
1444 if (INTERACTIVE
&& !NILP (b
->filename
)
1445 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1448 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1449 b
->name
, make_number (0)));
1455 /* Run hooks with the buffer to be killed the current buffer. */
1457 int count
= SPECPDL_INDEX ();
1458 Lisp_Object arglist
[1];
1460 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1461 set_buffer_internal (b
);
1463 /* First run the query functions; if any query is answered no,
1464 don't kill the buffer. */
1465 arglist
[0] = Qkill_buffer_query_functions
;
1466 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1468 return unbind_to (count
, Qnil
);
1470 /* Then run the hooks. */
1471 Frun_hooks (1, &Qkill_buffer_hook
);
1472 unbind_to (count
, Qnil
);
1475 /* We have no more questions to ask. Verify that it is valid
1476 to kill the buffer. This must be done after the questions
1477 since anything can happen within do_yes_or_no_p. */
1479 /* Don't kill the minibuffer now current. */
1480 if (EQ (buffer
, XWINDOW (minibuf_window
)->buffer
))
1486 /* When we kill a base buffer, kill all its indirect buffers.
1487 We do it at this stage so nothing terrible happens if they
1488 ask questions or their hooks get errors. */
1489 if (! b
->base_buffer
)
1491 struct buffer
*other
;
1495 for (other
= all_buffers
; other
; other
= other
->next
)
1496 /* all_buffers contains dead buffers too;
1497 don't re-kill them. */
1498 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1501 XSETBUFFER (buffer
, other
);
1502 Fkill_buffer (buffer
);
1508 /* Make this buffer not be current.
1509 In the process, notice if this is the sole visible buffer
1510 and give up if so. */
1511 if (b
== current_buffer
)
1513 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1515 if (b
== current_buffer
)
1519 /* Notice if the buffer to kill is the sole visible buffer
1520 when we're currently in the mini-buffer, and give up if so. */
1521 XSETBUFFER (tem
, current_buffer
);
1522 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1524 tem
= Fother_buffer (buffer
, Qnil
, Qnil
);
1525 if (EQ (buffer
, tem
))
1529 /* Now there is no question: we can kill the buffer. */
1531 #ifdef CLASH_DETECTION
1532 /* Unlock this buffer's file, if it is locked. */
1534 #endif /* CLASH_DETECTION */
1537 kill_buffer_processes (buffer
);
1540 /* Killing buffer processes may run sentinels which may
1541 have called kill-buffer. */
1546 clear_charpos_cache (b
);
1548 tem
= Vinhibit_quit
;
1550 replace_buffer_in_all_windows (buffer
);
1551 Vbuffer_alist
= Fdelq (Frassq (buffer
, Vbuffer_alist
), Vbuffer_alist
);
1552 frames_discard_buffer (buffer
);
1553 Vinhibit_quit
= tem
;
1555 /* Delete any auto-save file, if we saved it in this session.
1556 But not if the buffer is modified. */
1557 if (STRINGP (b
->auto_save_file_name
)
1558 && BUF_AUTOSAVE_MODIFF (b
) != 0
1559 && BUF_SAVE_MODIFF (b
) < BUF_AUTOSAVE_MODIFF (b
)
1560 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1561 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1564 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1566 internal_delete_file (b
->auto_save_file_name
);
1571 /* Unchain all markers that belong to this indirect buffer.
1572 Don't unchain the markers that belong to the base buffer
1573 or its other indirect buffers. */
1574 for (m
= BUF_MARKERS (b
); m
; )
1576 struct Lisp_Marker
*next
= m
->next
;
1584 /* Unchain all markers of this buffer and its indirect buffers.
1585 and leave them pointing nowhere. */
1586 for (m
= BUF_MARKERS (b
); m
; )
1588 struct Lisp_Marker
*next
= m
->next
;
1593 BUF_MARKERS (b
) = NULL
;
1594 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1596 /* Perhaps we should explicitly free the interval tree here... */
1599 /* Reset the local variables, so that this buffer's local values
1600 won't be protected from GC. They would be protected
1601 if they happened to remain encached in their symbols.
1602 This gets rid of them for certain. */
1603 swap_out_buffer_local_variables (b
);
1604 reset_buffer_local_variables (b
, 1);
1609 if (! b
->base_buffer
)
1610 free_buffer_text (b
);
1612 if (b
->newline_cache
)
1614 free_region_cache (b
->newline_cache
);
1615 b
->newline_cache
= 0;
1617 if (b
->width_run_cache
)
1619 free_region_cache (b
->width_run_cache
);
1620 b
->width_run_cache
= 0;
1622 b
->width_table
= Qnil
;
1624 b
->undo_list
= Qnil
;
1629 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1630 we do this each time BUF is selected visibly, the more recently
1631 selected buffers are always closer to the front of the list. This
1632 means that other_buffer is more likely to choose a relevant buffer. */
1638 register Lisp_Object link
, prev
;
1640 frame
= selected_frame
;
1643 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1645 if (EQ (XCDR (XCAR (link
)), buf
))
1650 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1651 we cannot use Fdelq itself here because it allows quitting. */
1654 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1656 XSETCDR (prev
, XCDR (XCDR (prev
)));
1658 XSETCDR (link
, Vbuffer_alist
);
1659 Vbuffer_alist
= link
;
1661 /* Effectively do a delq on buried_buffer_list. */
1664 for (link
= XFRAME (frame
)->buried_buffer_list
; CONSP (link
);
1667 if (EQ (XCAR (link
), buf
))
1670 XFRAME (frame
)->buried_buffer_list
= XCDR (link
);
1672 XSETCDR (prev
, XCDR (XCDR (prev
)));
1678 /* Now move this buffer to the front of frame_buffer_list also. */
1681 for (link
= frame_buffer_list (frame
); CONSP (link
);
1684 if (EQ (XCAR (link
), buf
))
1689 /* Effectively do delq. */
1694 set_frame_buffer_list (frame
,
1695 XCDR (frame_buffer_list (frame
)));
1697 XSETCDR (prev
, XCDR (XCDR (prev
)));
1699 XSETCDR (link
, frame_buffer_list (frame
));
1700 set_frame_buffer_list (frame
, link
);
1703 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1706 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1707 doc
: /* Set an appropriate major mode for BUFFER.
1708 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1709 according to `default-major-mode'.
1710 Use this function before selecting the buffer, since it may need to inspect
1711 the current buffer's major mode. */)
1716 Lisp_Object function
;
1718 CHECK_BUFFER (buffer
);
1720 if (STRINGP (XBUFFER (buffer
)->name
)
1721 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1722 function
= find_symbol_value (intern ("initial-major-mode"));
1725 function
= buffer_defaults
.major_mode
;
1727 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1728 function
= current_buffer
->major_mode
;
1731 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1734 count
= SPECPDL_INDEX ();
1736 /* To select a nonfundamental mode,
1737 select the buffer temporarily and then call the mode function. */
1739 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1741 Fset_buffer (buffer
);
1744 return unbind_to (count
, Qnil
);
1747 /* Switch to buffer BUFFER in the selected window.
1748 If NORECORD is non-nil, don't call record_buffer. */
1751 switch_to_buffer_1 (buffer_or_name
, norecord
)
1752 Lisp_Object buffer_or_name
, norecord
;
1754 register Lisp_Object buffer
;
1756 if (NILP (buffer_or_name
))
1757 buffer
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1760 buffer
= Fget_buffer (buffer_or_name
);
1763 buffer
= Fget_buffer_create (buffer_or_name
);
1764 Fset_buffer_major_mode (buffer
);
1767 Fset_buffer (buffer
);
1768 if (NILP (norecord
))
1769 record_buffer (buffer
);
1771 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1772 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1779 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2,
1780 "(list (read-buffer-to-switch \"Switch to buffer: \"))",
1781 doc
: /* Make BUFFER-OR-NAME current and display it in selected window.
1782 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
1783 nil. Return the buffer switched to.
1785 If BUFFER-OR-NAME is a string and does not identify an existing
1786 buffer, create a new buffer with that name. Interactively, if
1787 `confirm-nonexistent-file-or-buffer' is non-nil, request
1788 confirmation before creating a new buffer. If BUFFER-OR-NAME is
1789 nil, switch to buffer returned by `other-buffer'.
1791 Optional second arg NORECORD non-nil means do not put this buffer
1792 at the front of the list of recently selected ones. This
1793 function returns the buffer it switched to as a Lisp object.
1795 If the selected window is the minibuffer window or dedicated to
1796 its buffer, use `pop-to-buffer' for displaying the buffer.
1798 WARNING: This is NOT the way to work on another buffer temporarily
1799 within a Lisp program! Use `set-buffer' instead. That avoids
1800 messing with the window-buffer correspondences. */)
1801 (buffer_or_name
, norecord
)
1802 Lisp_Object buffer_or_name
, norecord
;
1806 if (EQ (buffer_or_name
, Fwindow_buffer (selected_window
)))
1808 /* Basically a NOP. Avoid signalling an error in the case where
1809 the selected window is dedicated, or a minibuffer. */
1811 /* But do put this buffer at the front of the buffer list, unless
1812 that has been inhibited. Note that even if BUFFER-OR-NAME is
1813 at the front of the main buffer-list already, we still want to
1814 move it to the front of the frame's buffer list. */
1815 if (NILP (norecord
))
1816 record_buffer (buffer_or_name
);
1817 return Fset_buffer (buffer_or_name
);
1819 else if (EQ (minibuf_window
, selected_window
)
1820 /* If `dedicated' is neither nil nor t, it means it's
1821 dedicatedness can be overridden by an explicit request
1822 such as a call to switch-to-buffer. */
1823 || EQ (Fwindow_dedicated_p (selected_window
), Qt
))
1824 /* We can't use the selected window so let `pop-to-buffer' try some
1826 return call3 (intern ("pop-to-buffer"), buffer_or_name
, Qnil
, norecord
);
1828 return switch_to_buffer_1 (buffer_or_name
, norecord
);
1831 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1832 doc
: /* Return the current buffer as a Lisp object. */)
1835 register Lisp_Object buf
;
1836 XSETBUFFER (buf
, current_buffer
);
1840 /* Set the current buffer to B.
1842 We previously set windows_or_buffers_changed here to invalidate
1843 global unchanged information in beg_unchanged and end_unchanged.
1844 This is no longer necessary because we now compute unchanged
1845 information on a buffer-basis. Every action affecting other
1846 windows than the selected one requires a select_window at some
1847 time, and that increments windows_or_buffers_changed. */
1850 set_buffer_internal (b
)
1851 register struct buffer
*b
;
1853 if (current_buffer
!= b
)
1854 set_buffer_internal_1 (b
);
1857 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1858 This is used by redisplay. */
1861 set_buffer_internal_1 (b
)
1862 register struct buffer
*b
;
1864 register struct buffer
*old_buf
;
1865 register Lisp_Object tail
, valcontents
;
1868 #ifdef USE_MMAP_FOR_BUFFERS
1869 if (b
->text
->beg
== NULL
)
1870 enlarge_buffer_text (b
, 0);
1871 #endif /* USE_MMAP_FOR_BUFFERS */
1873 if (current_buffer
== b
)
1876 old_buf
= current_buffer
;
1878 last_known_column_point
= -1; /* invalidate indentation cache */
1882 /* Put the undo list back in the base buffer, so that it appears
1883 that an indirect buffer shares the undo list of its base. */
1884 if (old_buf
->base_buffer
)
1885 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1887 /* If the old current buffer has markers to record PT, BEGV and ZV
1888 when it is not current, update them now. */
1889 if (! NILP (old_buf
->pt_marker
))
1892 XSETBUFFER (obuf
, old_buf
);
1893 set_marker_both (old_buf
->pt_marker
, obuf
,
1894 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1896 if (! NILP (old_buf
->begv_marker
))
1899 XSETBUFFER (obuf
, old_buf
);
1900 set_marker_both (old_buf
->begv_marker
, obuf
,
1901 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1903 if (! NILP (old_buf
->zv_marker
))
1906 XSETBUFFER (obuf
, old_buf
);
1907 set_marker_both (old_buf
->zv_marker
, obuf
,
1908 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1912 /* Get the undo list from the base buffer, so that it appears
1913 that an indirect buffer shares the undo list of its base. */
1915 b
->undo_list
= b
->base_buffer
->undo_list
;
1917 /* If the new current buffer has markers to record PT, BEGV and ZV
1918 when it is not current, fetch them now. */
1919 if (! NILP (b
->pt_marker
))
1921 BUF_PT (b
) = marker_position (b
->pt_marker
);
1922 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1924 if (! NILP (b
->begv_marker
))
1926 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1927 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1929 if (! NILP (b
->zv_marker
))
1931 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1932 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1935 /* Look down buffer's list of local Lisp variables
1936 to find and update any that forward into C variables. */
1938 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1940 if (CONSP (XCAR (tail
))
1941 && SYMBOLP (XCAR (XCAR (tail
)))
1942 && (valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
))),
1943 (BUFFER_LOCAL_VALUEP (valcontents
)))
1944 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1945 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1946 /* Just reference the variable to cause it to become set for
1948 Fsymbol_value (XCAR (XCAR (tail
)));
1951 /* Do the same with any others that were local to the previous buffer */
1954 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1957 && SYMBOLP (XCAR (XCAR (tail
)))
1958 && (valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
))),
1959 (BUFFER_LOCAL_VALUEP (valcontents
)))
1960 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1961 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1962 /* Just reference the variable to cause it to become set for
1964 Fsymbol_value (XCAR (XCAR (tail
)));
1968 /* Switch to buffer B temporarily for redisplay purposes.
1969 This avoids certain things that don't need to be done within redisplay. */
1975 register struct buffer
*old_buf
;
1977 if (current_buffer
== b
)
1980 old_buf
= current_buffer
;
1985 /* If the old current buffer has markers to record PT, BEGV and ZV
1986 when it is not current, update them now. */
1987 if (! NILP (old_buf
->pt_marker
))
1990 XSETBUFFER (obuf
, old_buf
);
1991 set_marker_both (old_buf
->pt_marker
, obuf
,
1992 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1994 if (! NILP (old_buf
->begv_marker
))
1997 XSETBUFFER (obuf
, old_buf
);
1998 set_marker_both (old_buf
->begv_marker
, obuf
,
1999 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
2001 if (! NILP (old_buf
->zv_marker
))
2004 XSETBUFFER (obuf
, old_buf
);
2005 set_marker_both (old_buf
->zv_marker
, obuf
,
2006 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
2010 /* If the new current buffer has markers to record PT, BEGV and ZV
2011 when it is not current, fetch them now. */
2012 if (! NILP (b
->pt_marker
))
2014 BUF_PT (b
) = marker_position (b
->pt_marker
);
2015 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
2017 if (! NILP (b
->begv_marker
))
2019 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
2020 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
2022 if (! NILP (b
->zv_marker
))
2024 BUF_ZV (b
) = marker_position (b
->zv_marker
);
2025 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
2029 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
2030 doc
: /* Make buffer BUFFER-OR-NAME current for editing operations.
2031 BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See
2032 also `save-excursion' when you want to make a buffer current
2033 temporarily. This function does not display the buffer, so its effect
2034 ends when the current command terminates. Use `switch-to-buffer' or
2035 `pop-to-buffer' to switch buffers permanently. */)
2037 register Lisp_Object buffer_or_name
;
2039 register Lisp_Object buffer
;
2040 buffer
= Fget_buffer (buffer_or_name
);
2042 nsberror (buffer_or_name
);
2043 if (NILP (XBUFFER (buffer
)->name
))
2044 error ("Selecting deleted buffer");
2045 set_buffer_internal (XBUFFER (buffer
));
2049 /* Set the current buffer to BUFFER provided it is alive. */
2052 set_buffer_if_live (buffer
)
2055 if (! NILP (XBUFFER (buffer
)->name
))
2056 Fset_buffer (buffer
);
2060 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
2061 Sbarf_if_buffer_read_only
, 0, 0, 0,
2062 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
2065 if (!NILP (current_buffer
->read_only
)
2066 && NILP (Vinhibit_read_only
))
2067 xsignal1 (Qbuffer_read_only
, Fcurrent_buffer ());
2071 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
2072 doc
: /* Put BUFFER-OR-NAME at the end of the list of all buffers.
2073 There it is the least likely candidate for `other-buffer' to return;
2074 thus, the least likely buffer for \\[switch-to-buffer] to select by
2077 The argument may be a buffer name or an actual buffer object. If
2078 BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it
2079 from the selected window if it is displayed there. If the selected
2080 window is dedicated to its buffer, delete that window if there are other
2081 windows on the same frame. If the selected window is the only window on
2082 its frame, iconify that frame. */)
2084 register Lisp_Object buffer_or_name
;
2088 /* Figure out what buffer we're going to bury. */
2089 if (NILP (buffer_or_name
))
2092 XSETBUFFER (buffer
, current_buffer
);
2094 tem
= Fwindow_buffer (selected_window
);
2095 /* If we're burying the current buffer, unshow it. */
2096 if (EQ (buffer
, tem
))
2098 if (NILP (Fwindow_dedicated_p (selected_window
)))
2099 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
2100 else if (NILP (XWINDOW (selected_window
)->parent
))
2101 Ficonify_frame (Fwindow_frame (selected_window
));
2103 Fdelete_window (selected_window
);
2108 buffer
= Fget_buffer (buffer_or_name
);
2110 nsberror (buffer_or_name
);
2113 /* Move buffer to the end of the buffer list. Do nothing if the
2114 buffer is killed. */
2115 if (!NILP (XBUFFER (buffer
)->name
))
2117 Lisp_Object aelt
, link
;
2119 aelt
= Frassq (buffer
, Vbuffer_alist
);
2120 link
= Fmemq (aelt
, Vbuffer_alist
);
2121 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2122 XSETCDR (link
, Qnil
);
2123 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2125 XFRAME (selected_frame
)->buffer_list
2126 = Fdelq (buffer
, XFRAME (selected_frame
)->buffer_list
);
2127 XFRAME (selected_frame
)->buried_buffer_list
2128 = Fcons (buffer
, Fdelq (buffer
, XFRAME (selected_frame
)->buried_buffer_list
));
2134 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2135 doc
: /* Delete the entire contents of the current buffer.
2136 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2137 so the buffer is truly empty after this. */)
2144 current_buffer
->last_window_start
= 1;
2145 /* Prevent warnings, or suspension of auto saving, that would happen
2146 if future size is less than past size. Use of erase-buffer
2147 implies that the future text is not really related to the past text. */
2148 XSETFASTINT (current_buffer
->save_length
, 0);
2153 validate_region (b
, e
)
2154 register Lisp_Object
*b
, *e
;
2156 CHECK_NUMBER_COERCE_MARKER (*b
);
2157 CHECK_NUMBER_COERCE_MARKER (*e
);
2159 if (XINT (*b
) > XINT (*e
))
2162 tem
= *b
; *b
= *e
; *e
= tem
;
2165 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2166 && XINT (*e
) <= ZV
))
2167 args_out_of_range (*b
, *e
);
2170 /* Advance BYTE_POS up to a character boundary
2171 and return the adjusted position. */
2174 advance_to_char_boundary (byte_pos
)
2179 if (byte_pos
== BEG
)
2180 /* Beginning of buffer is always a character boundary. */
2183 c
= FETCH_BYTE (byte_pos
);
2184 if (! CHAR_HEAD_P (c
))
2186 /* We should advance BYTE_POS only when C is a constituent of a
2187 multibyte sequence. */
2188 int orig_byte_pos
= byte_pos
;
2193 c
= FETCH_BYTE (byte_pos
);
2195 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2197 if (byte_pos
< orig_byte_pos
)
2198 byte_pos
= orig_byte_pos
;
2199 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2200 surely advance to the correct character boundary. If C is
2201 not, BYTE_POS was unchanged. */
2208 extern void r_alloc_reset_variable
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
2209 #endif /* REL_ALLOC */
2211 DEFUN ("buffer-swap-text", Fbuffer_swap_text
, Sbuffer_swap_text
,
2213 doc
: /* Swap the text between current buffer and BUFFER. */)
2217 struct buffer
*other_buffer
;
2218 CHECK_BUFFER (buffer
);
2219 other_buffer
= XBUFFER (buffer
);
2221 if (NILP (other_buffer
->name
))
2222 error ("Cannot swap a dead buffer's text");
2224 /* Actually, it probably works just fine.
2225 * if (other_buffer == current_buffer)
2226 * error ("Cannot swap a buffer's text with itself"); */
2228 /* Actually, this may be workable as well, tho probably only if they're
2230 if (other_buffer
->base_buffer
2231 || current_buffer
->base_buffer
)
2232 error ("Cannot swap indirect buffers's text");
2234 { /* This is probably harder to make work. */
2235 struct buffer
*other
;
2236 for (other
= all_buffers
; other
; other
= other
->next
)
2237 if (other
->base_buffer
== other_buffer
2238 || other
->base_buffer
== current_buffer
)
2239 error ("One of the buffers to swap has indirect buffers");
2242 #define swapfield(field, type) \
2244 type tmp##field = other_buffer->field; \
2245 other_buffer->field = current_buffer->field; \
2246 current_buffer->field = tmp##field; \
2249 swapfield (own_text
, struct buffer_text
);
2250 eassert (current_buffer
->text
== ¤t_buffer
->own_text
);
2251 eassert (other_buffer
->text
== &other_buffer
->own_text
);
2253 r_alloc_reset_variable ((POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
,
2254 (POINTER_TYPE
**) &other_buffer
->own_text
.beg
);
2255 r_alloc_reset_variable ((POINTER_TYPE
**) &other_buffer
->own_text
.beg
,
2256 (POINTER_TYPE
**) ¤t_buffer
->own_text
.beg
);
2257 #endif /* REL_ALLOC */
2259 swapfield (pt
, EMACS_INT
);
2260 swapfield (pt_byte
, EMACS_INT
);
2261 swapfield (begv
, EMACS_INT
);
2262 swapfield (begv_byte
, EMACS_INT
);
2263 swapfield (zv
, EMACS_INT
);
2264 swapfield (zv_byte
, EMACS_INT
);
2265 eassert (!current_buffer
->base_buffer
);
2266 eassert (!other_buffer
->base_buffer
);
2267 current_buffer
->clip_changed
= 1; other_buffer
->clip_changed
= 1;
2268 swapfield (newline_cache
, struct region_cache
*);
2269 swapfield (width_run_cache
, struct region_cache
*);
2270 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2271 other_buffer
->prevent_redisplay_optimizations_p
= 1;
2272 swapfield (overlays_before
, struct Lisp_Overlay
*);
2273 swapfield (overlays_after
, struct Lisp_Overlay
*);
2274 swapfield (overlay_center
, EMACS_INT
);
2275 swapfield (undo_list
, Lisp_Object
);
2276 swapfield (mark
, Lisp_Object
);
2277 swapfield (enable_multibyte_characters
, Lisp_Object
);
2278 swapfield (bidi_display_reordering
, Lisp_Object
);
2279 swapfield (bidi_paragraph_direction
, Lisp_Object
);
2280 /* FIXME: Not sure what we should do with these *_marker fields.
2281 Hopefully they're just nil anyway. */
2282 swapfield (pt_marker
, Lisp_Object
);
2283 swapfield (begv_marker
, Lisp_Object
);
2284 swapfield (zv_marker
, Lisp_Object
);
2285 current_buffer
->point_before_scroll
= Qnil
;
2286 other_buffer
->point_before_scroll
= Qnil
;
2288 current_buffer
->text
->modiff
++; other_buffer
->text
->modiff
++;
2289 current_buffer
->text
->chars_modiff
++; other_buffer
->text
->chars_modiff
++;
2290 current_buffer
->text
->overlay_modiff
++; other_buffer
->text
->overlay_modiff
++;
2291 current_buffer
->text
->beg_unchanged
= current_buffer
->text
->gpt
;
2292 current_buffer
->text
->end_unchanged
= current_buffer
->text
->gpt
;
2293 other_buffer
->text
->beg_unchanged
= other_buffer
->text
->gpt
;
2294 other_buffer
->text
->end_unchanged
= other_buffer
->text
->gpt
;
2296 struct Lisp_Marker
*m
;
2297 for (m
= BUF_MARKERS (current_buffer
); m
; m
= m
->next
)
2298 if (m
->buffer
== other_buffer
)
2299 m
->buffer
= current_buffer
;
2301 /* Since there's no indirect buffer in sight, markers on
2302 BUF_MARKERS(buf) should either be for `buf' or dead. */
2303 eassert (!m
->buffer
);
2304 for (m
= BUF_MARKERS (other_buffer
); m
; m
= m
->next
)
2305 if (m
->buffer
== current_buffer
)
2306 m
->buffer
= other_buffer
;
2308 /* Since there's no indirect buffer in sight, markers on
2309 BUF_MARKERS(buf) should either be for `buf' or dead. */
2310 eassert (!m
->buffer
);
2312 { /* Some of the C code expects that w->buffer == w->pointm->buffer.
2313 So since we just swapped the markers between the two buffers, we need
2314 to undo the effect of this swap for window markers. */
2315 Lisp_Object w
= Fselected_window (), ws
= Qnil
;
2316 Lisp_Object buf1
, buf2
;
2317 XSETBUFFER (buf1
, current_buffer
); XSETBUFFER (buf2
, other_buffer
);
2319 while (NILP (Fmemq (w
, ws
)))
2322 if (MARKERP (XWINDOW (w
)->pointm
)
2323 && (EQ (XWINDOW (w
)->buffer
, buf1
)
2324 || EQ (XWINDOW (w
)->buffer
, buf2
)))
2325 Fset_marker (XWINDOW (w
)->pointm
,
2326 make_number (BUF_BEGV (XBUFFER (XWINDOW (w
)->buffer
))),
2327 XWINDOW (w
)->buffer
);
2328 w
= Fnext_window (w
, Qt
, Qt
);
2332 if (current_buffer
->text
->intervals
)
2333 (eassert (EQ (current_buffer
->text
->intervals
->up
.obj
, buffer
)),
2334 XSETBUFFER (current_buffer
->text
->intervals
->up
.obj
, current_buffer
));
2335 if (other_buffer
->text
->intervals
)
2336 (eassert (EQ (other_buffer
->text
->intervals
->up
.obj
, Fcurrent_buffer ())),
2337 XSETBUFFER (other_buffer
->text
->intervals
->up
.obj
, other_buffer
));
2342 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2344 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2345 If FLAG is t, this makes the buffer a multibyte buffer.
2346 If FLAG is nil, this makes the buffer a single-byte buffer.
2347 In these cases, the buffer contents remain unchanged as a sequence of
2348 bytes but the contents viewed as characters do change.
2349 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2350 all eight-bit bytes to eight-bit characters.
2351 If the multibyte flag was really changed, undo information of the
2352 current buffer is cleared. */)
2356 struct Lisp_Marker
*tail
, *markers
;
2357 struct buffer
*other
;
2359 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2360 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2361 Lisp_Object old_undo
= current_buffer
->undo_list
;
2362 struct gcpro gcpro1
;
2364 if (current_buffer
->base_buffer
)
2365 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2367 /* Do nothing if nothing actually changes. */
2368 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2373 /* Don't record these buffer changes. We will put a special undo entry
2375 current_buffer
->undo_list
= Qt
;
2377 /* If the cached position is for this buffer, clear it out. */
2378 clear_charpos_cache (current_buffer
);
2381 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2383 begv
= BEGV
, zv
= ZV
;
2393 /* Do this first, so it can use CHAR_TO_BYTE
2394 to calculate the old correspondences. */
2395 set_intervals_multibyte (0);
2397 current_buffer
->enable_multibyte_characters
= Qnil
;
2403 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2406 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2407 tail
->charpos
= tail
->bytepos
;
2409 /* Convert multibyte form of 8-bit characters to unibyte. */
2424 if (ASCII_BYTE_P (*p
))
2426 else if (CHAR_BYTE8_HEAD_P (*p
))
2428 c
= STRING_CHAR_AND_LENGTH (p
, bytes
);
2429 /* Delete all bytes for this 8-bit character but the
2430 last one, and change the last one to the charcter
2433 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2445 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2446 p
+= bytes
, pos
+= bytes
;
2450 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2456 unsigned char *p
, *pend
;
2458 /* Be sure not to have a multibyte sequence striding over the GAP.
2459 Ex: We change this: "...abc\302 _GAP_ \241def..."
2460 to: "...abc _GAP_ \302\241def..." */
2463 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2464 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2466 unsigned char *p
= GPT_ADDR
- 1;
2468 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2469 if (BASE_LEADING_CODE_P (*p
))
2471 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2473 move_gap_both (new_gpt
, new_gpt
);
2477 /* Make the buffer contents valid as multibyte by converting
2478 8-bit characters to multibyte form. */
2496 if (ASCII_BYTE_P (*p
))
2498 else if (EQ (flag
, Qt
)
2499 && ! CHAR_BYTE8_HEAD_P (*p
)
2500 && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2501 p
+= bytes
, pos
+= bytes
;
2504 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2507 c
= BYTE8_TO_CHAR (*p
);
2508 bytes
= CHAR_STRING (c
, tmp
);
2510 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2512 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2513 /* Now the gap is after the just inserted data. */
2531 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2533 /* Do this first, so that chars_in_text asks the right question.
2534 set_intervals_multibyte needs it too. */
2535 current_buffer
->enable_multibyte_characters
= Qt
;
2537 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2538 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2540 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2542 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2543 if (BEGV_BYTE
> GPT_BYTE
)
2544 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2546 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2548 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2549 if (ZV_BYTE
> GPT_BYTE
)
2550 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2552 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2555 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2558 if (pt_byte
> GPT_BYTE
)
2559 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2561 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2562 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2565 tail
= markers
= BUF_MARKERS (current_buffer
);
2567 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2568 getting confused by the markers that have not yet been updated.
2569 It is also a signal that it should never create a marker. */
2570 BUF_MARKERS (current_buffer
) = NULL
;
2572 for (; tail
; tail
= tail
->next
)
2574 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2575 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2578 /* Make sure no markers were put on the chain
2579 while the chain value was incorrect. */
2580 if (BUF_MARKERS (current_buffer
))
2583 BUF_MARKERS (current_buffer
) = markers
;
2585 /* Do this last, so it can calculate the new correspondences
2586 between chars and bytes. */
2587 set_intervals_multibyte (1);
2590 if (!EQ (old_undo
, Qt
))
2592 /* Represent all the above changes by a special undo entry. */
2593 extern Lisp_Object Qapply
;
2594 current_buffer
->undo_list
= Fcons (list3 (Qapply
,
2595 intern ("set-buffer-multibyte"),
2596 NILP (flag
) ? Qt
: Qnil
),
2602 /* Changing the multibyteness of a buffer means that all windows
2603 showing that buffer must be updated thoroughly. */
2604 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2605 ++windows_or_buffers_changed
;
2607 /* Copy this buffer's new multibyte status
2608 into all of its indirect buffers. */
2609 for (other
= all_buffers
; other
; other
= other
->next
)
2610 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2612 other
->enable_multibyte_characters
2613 = current_buffer
->enable_multibyte_characters
;
2614 other
->prevent_redisplay_optimizations_p
= 1;
2617 /* Restore the modifiedness of the buffer. */
2618 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2619 Fset_buffer_modified_p (Qnil
);
2622 /* Update coding systems of this buffer's process (if any). */
2624 Lisp_Object process
;
2626 process
= Fget_buffer_process (Fcurrent_buffer ());
2627 if (PROCESSP (process
))
2628 setup_process_coding_systems (process
);
2630 #endif /* subprocesses */
2635 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2637 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2638 Most local variable bindings are eliminated so that the default values
2639 become effective once more. Also, the syntax table is set from
2640 `standard-syntax-table', the local keymap is set to nil,
2641 and the abbrev table from `fundamental-mode-abbrev-table'.
2642 This function also forces redisplay of the mode line.
2644 Every function to select a new major mode starts by
2645 calling this function.
2647 As a special exception, local variables whose names have
2648 a non-nil `permanent-local' property are not eliminated by this function.
2650 The first thing this function does is run
2651 the normal hook `change-major-mode-hook'. */)
2654 if (!NILP (Vrun_hooks
))
2655 call1 (Vrun_hooks
, Qchange_major_mode_hook
);
2657 /* Make sure none of the bindings in local_var_alist
2658 remain swapped in, in their symbols. */
2660 swap_out_buffer_local_variables (current_buffer
);
2662 /* Actually eliminate all local bindings of this buffer. */
2664 reset_buffer_local_variables (current_buffer
, 0);
2666 /* Force mode-line redisplay. Useful here because all major mode
2667 commands call this function. */
2668 update_mode_lines
++;
2673 /* Make sure no local variables remain set up with buffer B
2674 for their current values. */
2677 swap_out_buffer_local_variables (b
)
2680 Lisp_Object oalist
, alist
, sym
, buffer
;
2682 XSETBUFFER (buffer
, b
);
2683 oalist
= b
->local_var_alist
;
2685 for (alist
= oalist
; CONSP (alist
); alist
= XCDR (alist
))
2687 if (CONSP (XCAR (alist
))
2688 && (sym
= XCAR (XCAR (alist
)), SYMBOLP (sym
))
2689 /* Need not do anything if some other buffer's binding is
2691 && EQ (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
,
2694 /* Symbol is set up for this buffer's old local value:
2696 swap_in_global_binding (sym
);
2701 /* Find all the overlays in the current buffer that contain position POS.
2702 Return the number found, and store them in a vector in *VEC_PTR.
2703 Store in *LEN_PTR the size allocated for the vector.
2704 Store in *NEXT_PTR the next position after POS where an overlay starts,
2705 or ZV if there are no more overlays between POS and ZV.
2706 Store in *PREV_PTR the previous position before POS where an overlay ends,
2707 or where an overlay starts which ends at or after POS;
2708 or BEGV if there are no such overlays from BEGV to POS.
2709 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2711 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2712 when this function is called.
2714 If EXTEND is non-zero, we make the vector bigger if necessary.
2715 If EXTEND is zero, we never extend the vector,
2716 and we store only as many overlays as will fit.
2717 But we still return the total number of overlays.
2719 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2720 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2721 default (BEGV or ZV). */
2724 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2727 Lisp_Object
**vec_ptr
;
2729 EMACS_INT
*next_ptr
;
2730 EMACS_INT
*prev_ptr
;
2733 Lisp_Object overlay
, start
, end
;
2734 struct Lisp_Overlay
*tail
;
2737 Lisp_Object
*vec
= *vec_ptr
;
2740 int inhibit_storing
= 0;
2742 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2744 int startpos
, endpos
;
2746 XSETMISC (overlay
, tail
);
2748 start
= OVERLAY_START (overlay
);
2749 end
= OVERLAY_END (overlay
);
2750 endpos
= OVERLAY_POSITION (end
);
2757 startpos
= OVERLAY_POSITION (start
);
2758 /* This one ends at or after POS
2759 so its start counts for PREV_PTR if it's before POS. */
2760 if (prev
< startpos
&& startpos
< pos
)
2764 if (startpos
<= pos
)
2768 /* The supplied vector is full.
2769 Either make it bigger, or don't store any more in it. */
2772 /* Make it work with an initial len == 0. */
2777 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2781 inhibit_storing
= 1;
2784 if (!inhibit_storing
)
2786 /* Keep counting overlays even if we can't return them all. */
2789 else if (startpos
< next
)
2793 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2795 int startpos
, endpos
;
2797 XSETMISC (overlay
, tail
);
2799 start
= OVERLAY_START (overlay
);
2800 end
= OVERLAY_END (overlay
);
2801 startpos
= OVERLAY_POSITION (start
);
2804 if (startpos
< next
)
2808 endpos
= OVERLAY_POSITION (end
);
2815 /* Make it work with an initial len == 0. */
2820 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2824 inhibit_storing
= 1;
2827 if (!inhibit_storing
)
2831 if (startpos
< pos
&& startpos
> prev
)
2834 else if (endpos
< pos
&& endpos
> prev
)
2836 else if (endpos
== pos
&& startpos
> prev
2837 && (!change_req
|| startpos
< pos
))
2848 /* Find all the overlays in the current buffer that overlap the range
2849 BEG-END, or are empty at BEG, or are empty at END provided END
2850 denotes the position at the end of the current buffer.
2852 Return the number found, and store them in a vector in *VEC_PTR.
2853 Store in *LEN_PTR the size allocated for the vector.
2854 Store in *NEXT_PTR the next position after POS where an overlay starts,
2855 or ZV if there are no more overlays.
2856 Store in *PREV_PTR the previous position before POS where an overlay ends,
2857 or BEGV if there are no previous overlays.
2858 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2860 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2861 when this function is called.
2863 If EXTEND is non-zero, we make the vector bigger if necessary.
2864 If EXTEND is zero, we never extend the vector,
2865 and we store only as many overlays as will fit.
2866 But we still return the total number of overlays. */
2869 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2872 Lisp_Object
**vec_ptr
;
2877 Lisp_Object overlay
, ostart
, oend
;
2878 struct Lisp_Overlay
*tail
;
2881 Lisp_Object
*vec
= *vec_ptr
;
2884 int inhibit_storing
= 0;
2885 int end_is_Z
= end
== Z
;
2887 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2889 int startpos
, endpos
;
2891 XSETMISC (overlay
, tail
);
2893 ostart
= OVERLAY_START (overlay
);
2894 oend
= OVERLAY_END (overlay
);
2895 endpos
= OVERLAY_POSITION (oend
);
2902 startpos
= OVERLAY_POSITION (ostart
);
2903 /* Count an interval if it overlaps the range, is empty at the
2904 start of the range, or is empty at END provided END denotes the
2905 end of the buffer. */
2906 if ((beg
< endpos
&& startpos
< end
)
2907 || (startpos
== endpos
2908 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2912 /* The supplied vector is full.
2913 Either make it bigger, or don't store any more in it. */
2916 /* Make it work with an initial len == 0. */
2921 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2925 inhibit_storing
= 1;
2928 if (!inhibit_storing
)
2930 /* Keep counting overlays even if we can't return them all. */
2933 else if (startpos
< next
)
2937 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2939 int startpos
, endpos
;
2941 XSETMISC (overlay
, tail
);
2943 ostart
= OVERLAY_START (overlay
);
2944 oend
= OVERLAY_END (overlay
);
2945 startpos
= OVERLAY_POSITION (ostart
);
2948 if (startpos
< next
)
2952 endpos
= OVERLAY_POSITION (oend
);
2953 /* Count an interval if it overlaps the range, is empty at the
2954 start of the range, or is empty at END provided END denotes the
2955 end of the buffer. */
2956 if ((beg
< endpos
&& startpos
< end
)
2957 || (startpos
== endpos
2958 && (beg
== endpos
|| (end_is_Z
&& endpos
== end
))))
2964 /* Make it work with an initial len == 0. */
2969 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2973 inhibit_storing
= 1;
2976 if (!inhibit_storing
)
2980 else if (endpos
< beg
&& endpos
> prev
)
2992 /* Return non-zero if there exists an overlay with a non-nil
2993 `mouse-face' property overlapping OVERLAY. */
2996 mouse_face_overlay_overlaps (overlay
)
2997 Lisp_Object overlay
;
2999 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3000 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3002 Lisp_Object
*v
, tem
;
3005 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
3006 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
3009 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
3010 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
3013 for (i
= 0; i
< n
; ++i
)
3014 if (!EQ (v
[i
], overlay
)
3015 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
3024 /* Fast function to just test if we're at an overlay boundary. */
3026 overlay_touches_p (pos
)
3029 Lisp_Object overlay
;
3030 struct Lisp_Overlay
*tail
;
3032 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
3036 XSETMISC (overlay
,tail
);
3037 if (!OVERLAYP (overlay
))
3040 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3043 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
3047 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
3051 XSETMISC (overlay
, tail
);
3052 if (!OVERLAYP (overlay
))
3055 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3058 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
3066 Lisp_Object overlay
;
3072 compare_overlays (v1
, v2
)
3073 const void *v1
, *v2
;
3075 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
3076 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
3077 if (s1
->priority
!= s2
->priority
)
3078 return s1
->priority
- s2
->priority
;
3079 if (s1
->beg
!= s2
->beg
)
3080 return s1
->beg
- s2
->beg
;
3081 if (s1
->end
!= s2
->end
)
3082 return s2
->end
- s1
->end
;
3086 /* Sort an array of overlays by priority. The array is modified in place.
3087 The return value is the new size; this may be smaller than the original
3088 size if some of the overlays were invalid or were window-specific. */
3090 sort_overlays (overlay_vec
, noverlays
, w
)
3091 Lisp_Object
*overlay_vec
;
3096 struct sortvec
*sortvec
;
3097 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
3099 /* Put the valid and relevant overlays into sortvec. */
3101 for (i
= 0, j
= 0; i
< noverlays
; i
++)
3104 Lisp_Object overlay
;
3106 overlay
= overlay_vec
[i
];
3107 if (OVERLAY_VALID (overlay
)
3108 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
3109 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
3111 /* If we're interested in a specific window, then ignore
3112 overlays that are limited to some other window. */
3117 window
= Foverlay_get (overlay
, Qwindow
);
3118 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3122 /* This overlay is good and counts: put it into sortvec. */
3123 sortvec
[j
].overlay
= overlay
;
3124 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3125 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3126 tem
= Foverlay_get (overlay
, Qpriority
);
3128 sortvec
[j
].priority
= XINT (tem
);
3130 sortvec
[j
].priority
= 0;
3136 /* Sort the overlays into the proper order: increasing priority. */
3139 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
3141 for (i
= 0; i
< noverlays
; i
++)
3142 overlay_vec
[i
] = sortvec
[i
].overlay
;
3148 Lisp_Object string
, string2
;
3155 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
3156 int size
; /* Allocated length of that array. */
3157 int used
; /* How much of the array is currently in use. */
3158 int bytes
; /* Total length of the strings in buf. */
3161 /* Buffers for storing information about the overlays touching a given
3162 position. These could be automatic variables in overlay_strings, but
3163 it's more efficient to hold onto the memory instead of repeatedly
3164 allocating and freeing it. */
3165 static struct sortstrlist overlay_heads
, overlay_tails
;
3166 static unsigned char *overlay_str_buf
;
3168 /* Allocated length of overlay_str_buf. */
3169 static int overlay_str_len
;
3171 /* A comparison function suitable for passing to qsort. */
3173 cmp_for_strings (as1
, as2
)
3176 struct sortstr
*s1
= (struct sortstr
*)as1
;
3177 struct sortstr
*s2
= (struct sortstr
*)as2
;
3178 if (s1
->size
!= s2
->size
)
3179 return s2
->size
- s1
->size
;
3180 if (s1
->priority
!= s2
->priority
)
3181 return s1
->priority
- s2
->priority
;
3186 record_overlay_string (ssl
, str
, str2
, pri
, size
)
3187 struct sortstrlist
*ssl
;
3188 Lisp_Object str
, str2
, pri
;
3193 if (ssl
->used
== ssl
->size
)
3199 ssl
->buf
= ((struct sortstr
*)
3200 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
3202 ssl
->buf
[ssl
->used
].string
= str
;
3203 ssl
->buf
[ssl
->used
].string2
= str2
;
3204 ssl
->buf
[ssl
->used
].size
= size
;
3205 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
3208 if (NILP (current_buffer
->enable_multibyte_characters
))
3209 nbytes
= SCHARS (str
);
3210 else if (! STRING_MULTIBYTE (str
))
3211 nbytes
= count_size_as_multibyte (SDATA (str
),
3214 nbytes
= SBYTES (str
);
3216 ssl
->bytes
+= nbytes
;
3220 if (NILP (current_buffer
->enable_multibyte_characters
))
3221 nbytes
= SCHARS (str2
);
3222 else if (! STRING_MULTIBYTE (str2
))
3223 nbytes
= count_size_as_multibyte (SDATA (str2
),
3226 nbytes
= SBYTES (str2
);
3228 ssl
->bytes
+= nbytes
;
3232 /* Return the concatenation of the strings associated with overlays that
3233 begin or end at POS, ignoring overlays that are specific to a window
3234 other than W. The strings are concatenated in the appropriate order:
3235 shorter overlays nest inside longer ones, and higher priority inside
3236 lower. Normally all of the after-strings come first, but zero-sized
3237 overlays have their after-strings ride along with the before-strings
3238 because it would look strange to print them inside-out.
3240 Returns the string length, and stores the contents indirectly through
3241 PSTR, if that variable is non-null. The string may be overwritten by
3242 subsequent calls. */
3245 overlay_strings (pos
, w
, pstr
)
3248 unsigned char **pstr
;
3250 Lisp_Object overlay
, window
, str
;
3251 struct Lisp_Overlay
*ov
;
3252 int startpos
, endpos
;
3253 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3255 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3256 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3257 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3259 XSETMISC (overlay
, ov
);
3260 eassert (OVERLAYP (overlay
));
3262 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3263 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3266 if (endpos
!= pos
&& startpos
!= pos
)
3268 window
= Foverlay_get (overlay
, Qwindow
);
3269 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3272 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3273 record_overlay_string (&overlay_heads
, str
,
3275 ? Foverlay_get (overlay
, Qafter_string
)
3277 Foverlay_get (overlay
, Qpriority
),
3279 else if (endpos
== pos
3280 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3281 record_overlay_string (&overlay_tails
, str
, Qnil
,
3282 Foverlay_get (overlay
, Qpriority
),
3285 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3287 XSETMISC (overlay
, ov
);
3288 eassert (OVERLAYP (overlay
));
3290 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3291 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3294 if (endpos
!= pos
&& startpos
!= pos
)
3296 window
= Foverlay_get (overlay
, Qwindow
);
3297 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3300 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3301 record_overlay_string (&overlay_heads
, str
,
3303 ? Foverlay_get (overlay
, Qafter_string
)
3305 Foverlay_get (overlay
, Qpriority
),
3307 else if (endpos
== pos
3308 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3309 record_overlay_string (&overlay_tails
, str
, Qnil
,
3310 Foverlay_get (overlay
, Qpriority
),
3313 if (overlay_tails
.used
> 1)
3314 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3316 if (overlay_heads
.used
> 1)
3317 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3319 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3324 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3326 if (total
> overlay_str_len
)
3328 overlay_str_len
= total
;
3329 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3332 p
= overlay_str_buf
;
3333 for (i
= overlay_tails
.used
; --i
>= 0;)
3336 tem
= overlay_tails
.buf
[i
].string
;
3337 nbytes
= copy_text (SDATA (tem
), p
,
3339 STRING_MULTIBYTE (tem
), multibyte
);
3342 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3345 tem
= overlay_heads
.buf
[i
].string
;
3346 nbytes
= copy_text (SDATA (tem
), p
,
3348 STRING_MULTIBYTE (tem
), multibyte
);
3350 tem
= overlay_heads
.buf
[i
].string2
;
3353 nbytes
= copy_text (SDATA (tem
), p
,
3355 STRING_MULTIBYTE (tem
), multibyte
);
3359 if (p
!= overlay_str_buf
+ total
)
3362 *pstr
= overlay_str_buf
;
3368 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3371 recenter_overlay_lists (buf
, pos
)
3375 Lisp_Object overlay
, beg
, end
;
3376 struct Lisp_Overlay
*prev
, *tail
, *next
;
3378 /* See if anything in overlays_before should move to overlays_after. */
3380 /* We don't strictly need prev in this loop; it should always be nil.
3381 But we use it for symmetry and in case that should cease to be true
3382 with some future change. */
3384 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3387 XSETMISC (overlay
, tail
);
3389 /* If the overlay is not valid, get rid of it. */
3390 if (!OVERLAY_VALID (overlay
))
3395 /* Splice the cons cell TAIL out of overlays_before. */
3399 buf
->overlays_before
= next
;
3405 beg
= OVERLAY_START (overlay
);
3406 end
= OVERLAY_END (overlay
);
3408 if (OVERLAY_POSITION (end
) > pos
)
3410 /* OVERLAY needs to be moved. */
3411 int where
= OVERLAY_POSITION (beg
);
3412 struct Lisp_Overlay
*other
, *other_prev
;
3414 /* Splice the cons cell TAIL out of overlays_before. */
3418 buf
->overlays_before
= next
;
3420 /* Search thru overlays_after for where to put it. */
3422 for (other
= buf
->overlays_after
; other
;
3423 other_prev
= other
, other
= other
->next
)
3425 Lisp_Object otherbeg
, otheroverlay
;
3427 XSETMISC (otheroverlay
, other
);
3428 eassert (OVERLAY_VALID (otheroverlay
));
3430 otherbeg
= OVERLAY_START (otheroverlay
);
3431 if (OVERLAY_POSITION (otherbeg
) >= where
)
3435 /* Add TAIL to overlays_after before OTHER. */
3438 other_prev
->next
= tail
;
3440 buf
->overlays_after
= tail
;
3444 /* We've reached the things that should stay in overlays_before.
3445 All the rest of overlays_before must end even earlier,
3450 /* See if anything in overlays_after should be in overlays_before. */
3452 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3455 XSETMISC (overlay
, tail
);
3457 /* If the overlay is not valid, get rid of it. */
3458 if (!OVERLAY_VALID (overlay
))
3463 /* Splice the cons cell TAIL out of overlays_after. */
3467 buf
->overlays_after
= next
;
3473 beg
= OVERLAY_START (overlay
);
3474 end
= OVERLAY_END (overlay
);
3476 /* Stop looking, when we know that nothing further
3477 can possibly end before POS. */
3478 if (OVERLAY_POSITION (beg
) > pos
)
3481 if (OVERLAY_POSITION (end
) <= pos
)
3483 /* OVERLAY needs to be moved. */
3484 int where
= OVERLAY_POSITION (end
);
3485 struct Lisp_Overlay
*other
, *other_prev
;
3487 /* Splice the cons cell TAIL out of overlays_after. */
3491 buf
->overlays_after
= next
;
3493 /* Search thru overlays_before for where to put it. */
3495 for (other
= buf
->overlays_before
; other
;
3496 other_prev
= other
, other
= other
->next
)
3498 Lisp_Object otherend
, otheroverlay
;
3500 XSETMISC (otheroverlay
, other
);
3501 eassert (OVERLAY_VALID (otheroverlay
));
3503 otherend
= OVERLAY_END (otheroverlay
);
3504 if (OVERLAY_POSITION (otherend
) <= where
)
3508 /* Add TAIL to overlays_before before OTHER. */
3511 other_prev
->next
= tail
;
3513 buf
->overlays_before
= tail
;
3518 buf
->overlay_center
= pos
;
3522 adjust_overlays_for_insert (pos
, length
)
3526 /* After an insertion, the lists are still sorted properly,
3527 but we may need to update the value of the overlay center. */
3528 if (current_buffer
->overlay_center
>= pos
)
3529 current_buffer
->overlay_center
+= length
;
3533 adjust_overlays_for_delete (pos
, length
)
3537 if (current_buffer
->overlay_center
< pos
)
3538 /* The deletion was to our right. No change needed; the before- and
3539 after-lists are still consistent. */
3541 else if (current_buffer
->overlay_center
> pos
+ length
)
3542 /* The deletion was to our left. We need to adjust the center value
3543 to account for the change in position, but the lists are consistent
3544 given the new value. */
3545 current_buffer
->overlay_center
-= length
;
3547 /* We're right in the middle. There might be things on the after-list
3548 that now belong on the before-list. Recentering will move them,
3549 and also update the center point. */
3550 recenter_overlay_lists (current_buffer
, pos
);
3553 /* Fix up overlays that were garbled as a result of permuting markers
3554 in the range START through END. Any overlay with at least one
3555 endpoint in this range will need to be unlinked from the overlay
3556 list and reinserted in its proper place.
3557 Such an overlay might even have negative size at this point.
3558 If so, we'll make the overlay empty. */
3560 fix_start_end_in_overlays (start
, end
)
3561 register int start
, end
;
3563 Lisp_Object overlay
;
3564 struct Lisp_Overlay
*before_list
, *after_list
;
3565 /* These are either nil, indicating that before_list or after_list
3566 should be assigned, or the cons cell the cdr of which should be
3568 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3569 /* 'Parent', likewise, indicates a cons cell or
3570 current_buffer->overlays_before or overlays_after, depending
3571 which loop we're in. */
3572 struct Lisp_Overlay
*tail
, *parent
;
3573 int startpos
, endpos
;
3575 /* This algorithm shifts links around instead of consing and GCing.
3576 The loop invariant is that before_list (resp. after_list) is a
3577 well-formed list except that its last element, the CDR of beforep
3578 (resp. afterp) if beforep (afterp) isn't nil or before_list
3579 (after_list) if it is, is still uninitialized. So it's not a bug
3580 that before_list isn't initialized, although it may look
3582 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3584 XSETMISC (overlay
, tail
);
3586 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3587 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3589 /* If the overlay is backwards, make it empty. */
3590 if (endpos
< startpos
)
3593 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3601 || (startpos
>= start
&& startpos
< end
))
3603 /* Add it to the end of the wrong list. Later on,
3604 recenter_overlay_lists will move it to the right place. */
3605 if (endpos
< current_buffer
->overlay_center
)
3610 afterp
->next
= tail
;
3618 beforep
->next
= tail
;
3622 current_buffer
->overlays_before
= tail
->next
;
3624 parent
->next
= tail
->next
;
3628 parent
= tail
, tail
= parent
->next
;
3630 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3632 XSETMISC (overlay
, tail
);
3634 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3635 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3637 /* If the overlay is backwards, make it empty. */
3638 if (endpos
< startpos
)
3641 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3645 if (startpos
>= end
)
3648 if (startpos
>= start
3649 || (endpos
>= start
&& endpos
< end
))
3651 if (endpos
< current_buffer
->overlay_center
)
3656 afterp
->next
= tail
;
3664 beforep
->next
= tail
;
3668 current_buffer
->overlays_after
= tail
->next
;
3670 parent
->next
= tail
->next
;
3674 parent
= tail
, tail
= parent
->next
;
3677 /* Splice the constructed (wrong) lists into the buffer's lists,
3678 and let the recenter function make it sane again. */
3681 beforep
->next
= current_buffer
->overlays_before
;
3682 current_buffer
->overlays_before
= before_list
;
3684 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3688 afterp
->next
= current_buffer
->overlays_after
;
3689 current_buffer
->overlays_after
= after_list
;
3691 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3694 /* We have two types of overlay: the one whose ending marker is
3695 after-insertion-marker (this is the usual case) and the one whose
3696 ending marker is before-insertion-marker. When `overlays_before'
3697 contains overlays of the latter type and the former type in this
3698 order and both overlays end at inserting position, inserting a text
3699 increases only the ending marker of the latter type, which results
3700 in incorrect ordering of `overlays_before'.
3702 This function fixes ordering of overlays in the slot
3703 `overlays_before' of the buffer *BP. Before the insertion, `point'
3704 was at PREV, and now is at POS. */
3707 fix_overlays_before (bp
, prev
, pos
)
3709 EMACS_INT prev
, pos
;
3711 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3712 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3716 /* After the insertion, the several overlays may be in incorrect
3717 order. The possibility is that, in the list `overlays_before',
3718 an overlay which ends at POS appears after an overlay which ends
3719 at PREV. Since POS is greater than PREV, we must fix the
3720 ordering of these overlays, by moving overlays ends at POS before
3721 the overlays ends at PREV. */
3723 /* At first, find a place where disordered overlays should be linked
3724 in. It is where an overlay which end before POS exists. (i.e. an
3725 overlay whose ending marker is after-insertion-marker if disorder
3728 && (XSETMISC (tem
, tail
),
3729 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3735 /* If we don't find such an overlay,
3736 or the found one ends before PREV,
3737 or the found one is the last one in the list,
3738 we don't have to fix anything. */
3739 if (!tail
|| end
< prev
|| !tail
->next
)
3742 right_pair
= parent
;
3746 /* Now, end position of overlays in the list TAIL should be before
3747 or equal to PREV. In the loop, an overlay which ends at POS is
3748 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3749 we found an overlay which ends before PREV, the remaining
3750 overlays are in correct order. */
3753 XSETMISC (tem
, tail
);
3754 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3757 { /* This overlay is disordered. */
3758 struct Lisp_Overlay
*found
= tail
;
3760 /* Unlink the found overlay. */
3762 parent
->next
= tail
;
3763 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3764 and link it into the right place. */
3767 found
->next
= bp
->overlays_before
;
3768 bp
->overlays_before
= found
;
3772 found
->next
= right_pair
->next
;
3773 right_pair
->next
= found
;
3776 else if (end
== prev
)
3781 else /* No more disordered overlay. */
3786 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3787 doc
: /* Return t if OBJECT is an overlay. */)
3791 return (OVERLAYP (object
) ? Qt
: Qnil
);
3794 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3795 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3796 If omitted, BUFFER defaults to the current buffer.
3797 BEG and END may be integers or markers.
3798 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3799 for the front of the overlay advance when text is inserted there
3800 \(which means the text *is not* included in the overlay).
3801 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3802 for the rear of the overlay advance when text is inserted there
3803 \(which means the text *is* included in the overlay). */)
3804 (beg
, end
, buffer
, front_advance
, rear_advance
)
3805 Lisp_Object beg
, end
, buffer
;
3806 Lisp_Object front_advance
, rear_advance
;
3808 Lisp_Object overlay
;
3812 XSETBUFFER (buffer
, current_buffer
);
3814 CHECK_BUFFER (buffer
);
3816 && ! EQ (Fmarker_buffer (beg
), buffer
))
3817 error ("Marker points into wrong buffer");
3819 && ! EQ (Fmarker_buffer (end
), buffer
))
3820 error ("Marker points into wrong buffer");
3822 CHECK_NUMBER_COERCE_MARKER (beg
);
3823 CHECK_NUMBER_COERCE_MARKER (end
);
3825 if (XINT (beg
) > XINT (end
))
3828 temp
= beg
; beg
= end
; end
= temp
;
3831 b
= XBUFFER (buffer
);
3833 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3834 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3836 if (!NILP (front_advance
))
3837 XMARKER (beg
)->insertion_type
= 1;
3838 if (!NILP (rear_advance
))
3839 XMARKER (end
)->insertion_type
= 1;
3841 overlay
= allocate_misc ();
3842 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3843 XOVERLAY (overlay
)->start
= beg
;
3844 XOVERLAY (overlay
)->end
= end
;
3845 XOVERLAY (overlay
)->plist
= Qnil
;
3846 XOVERLAY (overlay
)->next
= NULL
;
3848 /* Put the new overlay on the wrong list. */
3849 end
= OVERLAY_END (overlay
);
3850 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3852 if (b
->overlays_after
)
3853 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3854 b
->overlays_after
= XOVERLAY (overlay
);
3858 if (b
->overlays_before
)
3859 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3860 b
->overlays_before
= XOVERLAY (overlay
);
3863 /* This puts it in the right list, and in the right order. */
3864 recenter_overlay_lists (b
, b
->overlay_center
);
3866 /* We don't need to redisplay the region covered by the overlay, because
3867 the overlay has no properties at the moment. */
3872 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3875 modify_overlay (buf
, start
, end
)
3877 EMACS_INT start
, end
;
3886 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3888 /* If this is a buffer not in the selected window,
3889 we must do other windows. */
3890 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3891 windows_or_buffers_changed
= 1;
3892 /* If multiple windows show this buffer, we must do other windows. */
3893 else if (buffer_shared
> 1)
3894 windows_or_buffers_changed
= 1;
3895 /* If we modify an overlay at the end of the buffer, we cannot
3896 be sure that window end is still valid. */
3897 else if (end
>= ZV
&& start
<= ZV
)
3898 windows_or_buffers_changed
= 1;
3900 ++BUF_OVERLAY_MODIFF (buf
);
3904 Lisp_Object
Fdelete_overlay ();
3906 static struct Lisp_Overlay
*
3907 unchain_overlay (list
, overlay
)
3908 struct Lisp_Overlay
*list
, *overlay
;
3910 struct Lisp_Overlay
*tmp
, *prev
;
3911 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3915 prev
->next
= tmp
->next
;
3918 overlay
->next
= NULL
;
3924 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3925 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3926 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3927 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3929 (overlay
, beg
, end
, buffer
)
3930 Lisp_Object overlay
, beg
, end
, buffer
;
3932 struct buffer
*b
, *ob
;
3933 Lisp_Object obuffer
;
3934 int count
= SPECPDL_INDEX ();
3936 CHECK_OVERLAY (overlay
);
3938 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3940 XSETBUFFER (buffer
, current_buffer
);
3941 CHECK_BUFFER (buffer
);
3944 && ! EQ (Fmarker_buffer (beg
), buffer
))
3945 error ("Marker points into wrong buffer");
3947 && ! EQ (Fmarker_buffer (end
), buffer
))
3948 error ("Marker points into wrong buffer");
3950 CHECK_NUMBER_COERCE_MARKER (beg
);
3951 CHECK_NUMBER_COERCE_MARKER (end
);
3953 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3954 return Fdelete_overlay (overlay
);
3956 if (XINT (beg
) > XINT (end
))
3959 temp
= beg
; beg
= end
; end
= temp
;
3962 specbind (Qinhibit_quit
, Qt
);
3964 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3965 b
= XBUFFER (buffer
);
3966 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3968 /* If the overlay has changed buffers, do a thorough redisplay. */
3969 if (!EQ (buffer
, obuffer
))
3971 /* Redisplay where the overlay was. */
3972 if (!NILP (obuffer
))
3977 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3978 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3980 modify_overlay (ob
, o_beg
, o_end
);
3983 /* Redisplay where the overlay is going to be. */
3984 modify_overlay (b
, XINT (beg
), XINT (end
));
3987 /* Redisplay the area the overlay has just left, or just enclosed. */
3991 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3992 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3994 if (o_beg
== XINT (beg
))
3995 modify_overlay (b
, o_end
, XINT (end
));
3996 else if (o_end
== XINT (end
))
3997 modify_overlay (b
, o_beg
, XINT (beg
));
4000 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
4001 if (XINT (end
) > o_end
) o_end
= XINT (end
);
4002 modify_overlay (b
, o_beg
, o_end
);
4006 if (!NILP (obuffer
))
4009 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
4011 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
4012 eassert (XOVERLAY (overlay
)->next
== NULL
);
4015 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
4016 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
4018 /* Put the overlay on the wrong list. */
4019 end
= OVERLAY_END (overlay
);
4020 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
4022 XOVERLAY (overlay
)->next
= b
->overlays_after
;
4023 b
->overlays_after
= XOVERLAY (overlay
);
4027 XOVERLAY (overlay
)->next
= b
->overlays_before
;
4028 b
->overlays_before
= XOVERLAY (overlay
);
4031 /* This puts it in the right list, and in the right order. */
4032 recenter_overlay_lists (b
, b
->overlay_center
);
4034 return unbind_to (count
, overlay
);
4037 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
4038 doc
: /* Delete the overlay OVERLAY from its buffer. */)
4040 Lisp_Object overlay
;
4044 int count
= SPECPDL_INDEX ();
4046 CHECK_OVERLAY (overlay
);
4048 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4052 b
= XBUFFER (buffer
);
4053 specbind (Qinhibit_quit
, Qt
);
4055 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
4056 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
4057 eassert (XOVERLAY (overlay
)->next
== NULL
);
4059 marker_position (OVERLAY_START (overlay
)),
4060 marker_position (OVERLAY_END (overlay
)));
4061 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
4062 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
4064 /* When deleting an overlay with before or after strings, turn off
4065 display optimizations for the affected buffer, on the basis that
4066 these strings may contain newlines. This is easier to do than to
4067 check for that situation during redisplay. */
4068 if (!windows_or_buffers_changed
4069 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
4070 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
4071 b
->prevent_redisplay_optimizations_p
= 1;
4073 return unbind_to (count
, Qnil
);
4076 /* Overlay dissection functions. */
4078 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
4079 doc
: /* Return the position at which OVERLAY starts. */)
4081 Lisp_Object overlay
;
4083 CHECK_OVERLAY (overlay
);
4085 return (Fmarker_position (OVERLAY_START (overlay
)));
4088 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
4089 doc
: /* Return the position at which OVERLAY ends. */)
4091 Lisp_Object overlay
;
4093 CHECK_OVERLAY (overlay
);
4095 return (Fmarker_position (OVERLAY_END (overlay
)));
4098 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
4099 doc
: /* Return the buffer OVERLAY belongs to.
4100 Return nil if OVERLAY has been deleted. */)
4102 Lisp_Object overlay
;
4104 CHECK_OVERLAY (overlay
);
4106 return Fmarker_buffer (OVERLAY_START (overlay
));
4109 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
4110 doc
: /* Return a list of the properties on OVERLAY.
4111 This is a copy of OVERLAY's plist; modifying its conses has no effect on
4114 Lisp_Object overlay
;
4116 CHECK_OVERLAY (overlay
);
4118 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
4122 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
4123 doc
: /* Return a list of the overlays that contain the character at POS. */)
4128 Lisp_Object
*overlay_vec
;
4132 CHECK_NUMBER_COERCE_MARKER (pos
);
4135 /* We can't use alloca here because overlays_at can call xrealloc. */
4136 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4138 /* Put all the overlays we want in a vector in overlay_vec.
4139 Store the length in len. */
4140 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4141 (EMACS_INT
*) 0, (EMACS_INT
*) 0, 0);
4143 /* Make a list of them all. */
4144 result
= Flist (noverlays
, overlay_vec
);
4146 xfree (overlay_vec
);
4150 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
4151 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
4152 Overlap means that at least one character is contained within the overlay
4153 and also contained within the specified region.
4154 Empty overlays are included in the result if they are located at BEG,
4155 between BEG and END, or at END provided END denotes the position at the
4156 end of the buffer. */)
4158 Lisp_Object beg
, end
;
4161 Lisp_Object
*overlay_vec
;
4165 CHECK_NUMBER_COERCE_MARKER (beg
);
4166 CHECK_NUMBER_COERCE_MARKER (end
);
4169 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4171 /* Put all the overlays we want in a vector in overlay_vec.
4172 Store the length in len. */
4173 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
4174 (int *) 0, (int *) 0);
4176 /* Make a list of them all. */
4177 result
= Flist (noverlays
, overlay_vec
);
4179 xfree (overlay_vec
);
4183 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
4185 doc
: /* Return the next position after POS where an overlay starts or ends.
4186 If there are no overlay boundaries from POS to (point-max),
4187 the value is (point-max). */)
4193 Lisp_Object
*overlay_vec
;
4197 CHECK_NUMBER_COERCE_MARKER (pos
);
4200 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4202 /* Put all the overlays we want in a vector in overlay_vec.
4203 Store the length in len.
4204 endpos gets the position where the next overlay starts. */
4205 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4206 &endpos
, (EMACS_INT
*) 0, 1);
4208 /* If any of these overlays ends before endpos,
4209 use its ending point instead. */
4210 for (i
= 0; i
< noverlays
; i
++)
4215 oend
= OVERLAY_END (overlay_vec
[i
]);
4216 oendpos
= OVERLAY_POSITION (oend
);
4217 if (oendpos
< endpos
)
4221 xfree (overlay_vec
);
4222 return make_number (endpos
);
4225 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
4226 Sprevious_overlay_change
, 1, 1, 0,
4227 doc
: /* Return the previous position before POS where an overlay starts or ends.
4228 If there are no overlay boundaries from (point-min) to POS,
4229 the value is (point-min). */)
4235 Lisp_Object
*overlay_vec
;
4238 CHECK_NUMBER_COERCE_MARKER (pos
);
4240 /* At beginning of buffer, we know the answer;
4241 avoid bug subtracting 1 below. */
4242 if (XINT (pos
) == BEGV
)
4246 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4248 /* Put all the overlays we want in a vector in overlay_vec.
4249 Store the length in len.
4250 prevpos gets the position of the previous change. */
4251 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4252 (EMACS_INT
*) 0, &prevpos
, 1);
4254 xfree (overlay_vec
);
4255 return make_number (prevpos
);
4258 /* These functions are for debugging overlays. */
4260 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4261 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4262 The car has all the overlays before the overlay center;
4263 the cdr has all the overlays after the overlay center.
4264 Recentering overlays moves overlays between these lists.
4265 The lists you get are copies, so that changing them has no effect.
4266 However, the overlays you get are the real objects that the buffer uses. */)
4269 struct Lisp_Overlay
*ol
;
4270 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4271 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4274 before
= Fcons (tmp
, before
);
4276 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4279 after
= Fcons (tmp
, after
);
4281 return Fcons (Fnreverse (before
), Fnreverse (after
));
4284 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4285 doc
: /* Recenter the overlays of the current buffer around position POS.
4286 That makes overlay lookup faster for positions near POS (but perhaps slower
4287 for positions far away from POS). */)
4291 CHECK_NUMBER_COERCE_MARKER (pos
);
4293 recenter_overlay_lists (current_buffer
, XINT (pos
));
4297 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4298 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4300 Lisp_Object overlay
, prop
;
4302 CHECK_OVERLAY (overlay
);
4303 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4306 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4307 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4308 (overlay
, prop
, value
)
4309 Lisp_Object overlay
, prop
, value
;
4311 Lisp_Object tail
, buffer
;
4314 CHECK_OVERLAY (overlay
);
4316 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4318 for (tail
= XOVERLAY (overlay
)->plist
;
4319 CONSP (tail
) && CONSP (XCDR (tail
));
4320 tail
= XCDR (XCDR (tail
)))
4321 if (EQ (XCAR (tail
), prop
))
4323 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4324 XSETCAR (XCDR (tail
), value
);
4327 /* It wasn't in the list, so add it to the front. */
4328 changed
= !NILP (value
);
4329 XOVERLAY (overlay
)->plist
4330 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4332 if (! NILP (buffer
))
4335 modify_overlay (XBUFFER (buffer
),
4336 marker_position (OVERLAY_START (overlay
)),
4337 marker_position (OVERLAY_END (overlay
)));
4338 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4339 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4340 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4341 Fdelete_overlay (overlay
);
4347 /* Subroutine of report_overlay_modification. */
4349 /* Lisp vector holding overlay hook functions to call.
4350 Vector elements come in pairs.
4351 Each even-index element is a list of hook functions.
4352 The following odd-index element is the overlay they came from.
4354 Before the buffer change, we fill in this vector
4355 as we call overlay hook functions.
4356 After the buffer change, we get the functions to call from this vector.
4357 This way we always call the same functions before and after the change. */
4358 static Lisp_Object last_overlay_modification_hooks
;
4360 /* Number of elements actually used in last_overlay_modification_hooks. */
4361 static int last_overlay_modification_hooks_used
;
4363 /* Add one functionlist/overlay pair
4364 to the end of last_overlay_modification_hooks. */
4367 add_overlay_mod_hooklist (functionlist
, overlay
)
4368 Lisp_Object functionlist
, overlay
;
4370 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4372 if (last_overlay_modification_hooks_used
== oldsize
)
4373 last_overlay_modification_hooks
= larger_vector
4374 (last_overlay_modification_hooks
, oldsize
* 2, Qnil
);
4375 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4376 functionlist
); last_overlay_modification_hooks_used
++;
4377 ASET (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
,
4378 overlay
); last_overlay_modification_hooks_used
++;
4381 /* Run the modification-hooks of overlays that include
4382 any part of the text in START to END.
4383 If this change is an insertion, also
4384 run the insert-before-hooks of overlay starting at END,
4385 and the insert-after-hooks of overlay ending at START.
4387 This is called both before and after the modification.
4388 AFTER is nonzero when we call after the modification.
4390 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4391 When AFTER is nonzero, they are the start position,
4392 the position after the inserted new text,
4393 and the length of deleted or replaced old text. */
4396 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4397 Lisp_Object start
, end
;
4399 Lisp_Object arg1
, arg2
, arg3
;
4401 Lisp_Object prop
, overlay
;
4402 struct Lisp_Overlay
*tail
;
4403 /* 1 if this change is an insertion. */
4404 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4405 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4410 /* We used to run the functions as soon as we found them and only register
4411 them in last_overlay_modification_hooks for the purpose of the `after'
4412 case. But running elisp code as we traverse the list of overlays is
4413 painful because the list can be modified by the elisp code so we had to
4414 copy at several places. We now simply do a read-only traversal that
4415 only collects the functions to run and we run them afterwards. It's
4416 simpler, especially since all the code was already there. -stef */
4420 /* We are being called before a change.
4421 Scan the overlays to find the functions to call. */
4422 last_overlay_modification_hooks_used
= 0;
4423 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4425 int startpos
, endpos
;
4426 Lisp_Object ostart
, oend
;
4428 XSETMISC (overlay
, tail
);
4430 ostart
= OVERLAY_START (overlay
);
4431 oend
= OVERLAY_END (overlay
);
4432 endpos
= OVERLAY_POSITION (oend
);
4433 if (XFASTINT (start
) > endpos
)
4435 startpos
= OVERLAY_POSITION (ostart
);
4436 if (insertion
&& (XFASTINT (start
) == startpos
4437 || XFASTINT (end
) == startpos
))
4439 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4441 add_overlay_mod_hooklist (prop
, overlay
);
4443 if (insertion
&& (XFASTINT (start
) == endpos
4444 || XFASTINT (end
) == endpos
))
4446 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4448 add_overlay_mod_hooklist (prop
, overlay
);
4450 /* Test for intersecting intervals. This does the right thing
4451 for both insertion and deletion. */
4452 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4454 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4456 add_overlay_mod_hooklist (prop
, overlay
);
4460 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4462 int startpos
, endpos
;
4463 Lisp_Object ostart
, oend
;
4465 XSETMISC (overlay
, tail
);
4467 ostart
= OVERLAY_START (overlay
);
4468 oend
= OVERLAY_END (overlay
);
4469 startpos
= OVERLAY_POSITION (ostart
);
4470 endpos
= OVERLAY_POSITION (oend
);
4471 if (XFASTINT (end
) < startpos
)
4473 if (insertion
&& (XFASTINT (start
) == startpos
4474 || XFASTINT (end
) == startpos
))
4476 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4478 add_overlay_mod_hooklist (prop
, overlay
);
4480 if (insertion
&& (XFASTINT (start
) == endpos
4481 || XFASTINT (end
) == endpos
))
4483 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4485 add_overlay_mod_hooklist (prop
, overlay
);
4487 /* Test for intersecting intervals. This does the right thing
4488 for both insertion and deletion. */
4489 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4491 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4493 add_overlay_mod_hooklist (prop
, overlay
);
4498 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4500 /* Call the functions recorded in last_overlay_modification_hooks.
4501 First copy the vector contents, in case some of these hooks
4502 do subsequent modification of the buffer. */
4503 int size
= last_overlay_modification_hooks_used
;
4504 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4507 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4508 copy
, size
* sizeof (Lisp_Object
));
4510 gcpro1
.nvars
= size
;
4512 for (i
= 0; i
< size
;)
4514 Lisp_Object prop
, overlay
;
4516 overlay
= copy
[i
++];
4517 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4524 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4525 Lisp_Object list
, overlay
;
4527 Lisp_Object arg1
, arg2
, arg3
;
4529 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4531 GCPRO4 (list
, arg1
, arg2
, arg3
);
4533 while (CONSP (list
))
4536 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4538 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4544 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4547 evaporate_overlays (pos
)
4550 Lisp_Object overlay
, hit_list
;
4551 struct Lisp_Overlay
*tail
;
4554 if (pos
<= current_buffer
->overlay_center
)
4555 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4558 XSETMISC (overlay
, tail
);
4559 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4562 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4563 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4564 hit_list
= Fcons (overlay
, hit_list
);
4567 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4570 XSETMISC (overlay
, tail
);
4571 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4574 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4575 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4576 hit_list
= Fcons (overlay
, hit_list
);
4578 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4579 Fdelete_overlay (XCAR (hit_list
));
4582 /* Somebody has tried to store a value with an unacceptable type
4583 in the slot with offset OFFSET. */
4586 buffer_slot_type_mismatch (newval
, type
)
4590 Lisp_Object predicate
;
4594 case_Lisp_Int
: predicate
= Qintegerp
; break;
4595 case Lisp_String
: predicate
= Qstringp
; break;
4596 case Lisp_Symbol
: predicate
= Qsymbolp
; break;
4600 wrong_type_argument (predicate
, newval
);
4604 /***********************************************************************
4605 Allocation with mmap
4606 ***********************************************************************/
4608 #ifdef USE_MMAP_FOR_BUFFERS
4610 #include <sys/types.h>
4611 #include <sys/mman.h>
4614 #ifdef MAP_ANONYMOUS
4615 #define MAP_ANON MAP_ANONYMOUS
4622 #define MAP_FAILED ((void *) -1)
4634 /* Memory is allocated in regions which are mapped using mmap(2).
4635 The current implementation lets the system select mapped
4636 addresses; we're not using MAP_FIXED in general, except when
4637 trying to enlarge regions.
4639 Each mapped region starts with a mmap_region structure, the user
4640 area starts after that structure, aligned to MEM_ALIGN.
4642 +-----------------------+
4643 | struct mmap_info + |
4645 +-----------------------+
4649 +-----------------------+ */
4653 /* User-specified size. */
4654 size_t nbytes_specified
;
4656 /* Number of bytes mapped */
4657 size_t nbytes_mapped
;
4659 /* Pointer to the location holding the address of the memory
4660 allocated with the mmap'd block. The variable actually points
4661 after this structure. */
4664 /* Next and previous in list of all mmap'd regions. */
4665 struct mmap_region
*next
, *prev
;
4668 /* Doubly-linked list of mmap'd regions. */
4670 static struct mmap_region
*mmap_regions
;
4672 /* File descriptor for mmap. If we don't have anonymous mapping,
4673 /dev/zero will be opened on it. */
4677 /* Temporary storage for mmap_set_vars, see there. */
4679 static struct mmap_region
*mmap_regions_1
;
4680 static int mmap_fd_1
;
4682 /* Page size on this system. */
4684 static int mmap_page_size
;
4686 /* 1 means mmap has been intialized. */
4688 static int mmap_initialized_p
;
4690 /* Value is X rounded up to the next multiple of N. */
4692 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4694 /* Size of mmap_region structure plus padding. */
4696 #define MMAP_REGION_STRUCT_SIZE \
4697 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4699 /* Given a pointer P to the start of the user-visible part of a mapped
4700 region, return a pointer to the start of the region. */
4702 #define MMAP_REGION(P) \
4703 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4705 /* Given a pointer P to the start of a mapped region, return a pointer
4706 to the start of the user-visible part of the region. */
4708 #define MMAP_USER_AREA(P) \
4709 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4711 #define MEM_ALIGN sizeof (double)
4713 /* Predicate returning true if part of the address range [START .. END]
4714 is currently mapped. Used to prevent overwriting an existing
4717 Default is to conservativly assume the address range is occupied by
4718 something else. This can be overridden by system configuration
4719 files if system-specific means to determine this exists. */
4721 #ifndef MMAP_ALLOCATED_P
4722 #define MMAP_ALLOCATED_P(start, end) 1
4725 /* Function prototypes. */
4727 static int mmap_free_1
P_ ((struct mmap_region
*));
4728 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4729 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4730 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4731 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4732 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4733 static void mmap_init
P_ ((void));
4736 /* Return a region overlapping address range START...END, or null if
4737 none. END is not including, i.e. the last byte in the range
4740 static struct mmap_region
*
4741 mmap_find (start
, end
)
4742 POINTER_TYPE
*start
, *end
;
4744 struct mmap_region
*r
;
4745 char *s
= (char *) start
, *e
= (char *) end
;
4747 for (r
= mmap_regions
; r
; r
= r
->next
)
4749 char *rstart
= (char *) r
;
4750 char *rend
= rstart
+ r
->nbytes_mapped
;
4752 if (/* First byte of range, i.e. START, in this region? */
4753 (s
>= rstart
&& s
< rend
)
4754 /* Last byte of range, i.e. END - 1, in this region? */
4755 || (e
> rstart
&& e
<= rend
)
4756 /* First byte of this region in the range? */
4757 || (rstart
>= s
&& rstart
< e
)
4758 /* Last byte of this region in the range? */
4759 || (rend
> s
&& rend
<= e
))
4767 /* Unmap a region. P is a pointer to the start of the user-araa of
4768 the region. Value is non-zero if successful. */
4772 struct mmap_region
*r
;
4775 r
->next
->prev
= r
->prev
;
4777 r
->prev
->next
= r
->next
;
4779 mmap_regions
= r
->next
;
4781 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4783 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4791 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4792 Value is non-zero if successful. */
4795 mmap_enlarge (r
, npages
)
4796 struct mmap_region
*r
;
4799 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4805 /* Unmap pages at the end of the region. */
4806 nbytes
= - npages
* mmap_page_size
;
4807 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4808 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4811 r
->nbytes_mapped
-= nbytes
;
4815 else if (npages
> 0)
4817 nbytes
= npages
* mmap_page_size
;
4819 /* Try to map additional pages at the end of the region. We
4820 cannot do this if the address range is already occupied by
4821 something else because mmap deletes any previous mapping.
4822 I'm not sure this is worth doing, let's see. */
4823 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4827 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4828 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4829 if (p
== MAP_FAILED
)
4830 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4831 else if (p
!= (POINTER_TYPE
*) region_end
)
4833 /* Kernels are free to choose a different address. In
4834 that case, unmap what we've mapped above; we have
4836 if (munmap (p
, nbytes
) == -1)
4837 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4841 r
->nbytes_mapped
+= nbytes
;
4851 /* Set or reset variables holding references to mapped regions. If
4852 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4853 non-zero, set all variables to the start of the user-areas
4856 This function is called from Fdump_emacs to ensure that the dumped
4857 Emacs doesn't contain references to memory that won't be mapped
4858 when Emacs starts. */
4861 mmap_set_vars (restore_p
)
4864 struct mmap_region
*r
;
4868 mmap_regions
= mmap_regions_1
;
4869 mmap_fd
= mmap_fd_1
;
4870 for (r
= mmap_regions
; r
; r
= r
->next
)
4871 *r
->var
= MMAP_USER_AREA (r
);
4875 for (r
= mmap_regions
; r
; r
= r
->next
)
4877 mmap_regions_1
= mmap_regions
;
4878 mmap_regions
= NULL
;
4879 mmap_fd_1
= mmap_fd
;
4885 /* Allocate a block of storage large enough to hold NBYTES bytes of
4886 data. A pointer to the data is returned in *VAR. VAR is thus the
4887 address of some variable which will use the data area.
4889 The allocation of 0 bytes is valid.
4891 If we can't allocate the necessary memory, set *VAR to null, and
4894 static POINTER_TYPE
*
4895 mmap_alloc (var
, nbytes
)
4904 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4905 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4908 if (p
== MAP_FAILED
)
4910 if (errno
!= ENOMEM
)
4911 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4916 struct mmap_region
*r
= (struct mmap_region
*) p
;
4918 r
->nbytes_specified
= nbytes
;
4919 r
->nbytes_mapped
= map
;
4922 r
->next
= mmap_regions
;
4927 p
= MMAP_USER_AREA (p
);
4934 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4935 resize it to size NBYTES. Change *VAR to reflect the new block,
4936 and return this value. If more memory cannot be allocated, then
4937 leave *VAR unchanged, and return null. */
4939 static POINTER_TYPE
*
4940 mmap_realloc (var
, nbytes
)
4944 POINTER_TYPE
*result
;
4949 result
= mmap_alloc (var
, nbytes
);
4950 else if (nbytes
== 0)
4953 result
= mmap_alloc (var
, nbytes
);
4957 struct mmap_region
*r
= MMAP_REGION (*var
);
4958 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4963 POINTER_TYPE
*old_ptr
= *var
;
4965 /* Try to map additional pages at the end of the region.
4966 If that fails, allocate a new region, copy data
4967 from the old region, then free it. */
4968 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4971 r
->nbytes_specified
= nbytes
;
4972 *var
= result
= old_ptr
;
4974 else if (mmap_alloc (var
, nbytes
))
4976 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4977 mmap_free_1 (MMAP_REGION (old_ptr
));
4979 r
= MMAP_REGION (result
);
4980 r
->nbytes_specified
= nbytes
;
4988 else if (room
- nbytes
>= mmap_page_size
)
4990 /* Shrinking by at least a page. Let's give some
4991 memory back to the system.
4993 The extra parens are to make the division happens first,
4994 on positive values, so we know it will round towards
4996 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4998 r
->nbytes_specified
= nbytes
;
5002 /* Leave it alone. */
5004 r
->nbytes_specified
= nbytes
;
5012 /* Free a block of relocatable storage whose data is pointed to by
5013 PTR. Store 0 in *PTR to show there's no block allocated. */
5023 mmap_free_1 (MMAP_REGION (*var
));
5029 /* Perform necessary intializations for the use of mmap. */
5035 /* The value of mmap_fd is initially 0 in temacs, and -1
5036 in a dumped Emacs. */
5039 /* No anonymous mmap -- we need the file descriptor. */
5040 mmap_fd
= open ("/dev/zero", O_RDONLY
);
5042 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
5044 #endif /* MAP_ANON == 0 */
5046 if (mmap_initialized_p
)
5048 mmap_initialized_p
= 1;
5054 mmap_page_size
= getpagesize ();
5057 #endif /* USE_MMAP_FOR_BUFFERS */
5061 /***********************************************************************
5062 Buffer-text Allocation
5063 ***********************************************************************/
5066 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
5067 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
5068 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
5069 #endif /* REL_ALLOC */
5072 /* Allocate NBYTES bytes for buffer B's text buffer. */
5075 alloc_buffer_text (b
, nbytes
)
5082 #if defined USE_MMAP_FOR_BUFFERS
5083 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
5084 #elif defined REL_ALLOC
5085 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
5087 p
= xmalloc (nbytes
);
5096 b
->text
->beg
= (unsigned char *) p
;
5100 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
5104 enlarge_buffer_text (struct buffer
*b
, EMACS_INT delta
)
5107 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
5110 #if defined USE_MMAP_FOR_BUFFERS
5111 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
5112 #elif defined REL_ALLOC
5113 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
5115 p
= xrealloc (b
->text
->beg
, nbytes
);
5124 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
5129 /* Free buffer B's text buffer. */
5132 free_buffer_text (b
)
5137 #if defined USE_MMAP_FOR_BUFFERS
5138 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
5139 #elif defined REL_ALLOC
5140 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
5142 xfree (b
->text
->beg
);
5145 BUF_BEG_ADDR (b
) = NULL
;
5151 /***********************************************************************
5153 ***********************************************************************/
5160 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
5162 /* Make sure all markable slots in buffer_defaults
5163 are initialized reasonably, so mark_buffer won't choke. */
5164 reset_buffer (&buffer_defaults
);
5165 reset_buffer_local_variables (&buffer_defaults
, 1);
5166 reset_buffer (&buffer_local_symbols
);
5167 reset_buffer_local_variables (&buffer_local_symbols
, 1);
5168 /* Prevent GC from getting confused. */
5169 buffer_defaults
.text
= &buffer_defaults
.own_text
;
5170 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
5171 BUF_INTERVALS (&buffer_defaults
) = 0;
5172 BUF_INTERVALS (&buffer_local_symbols
) = 0;
5173 XSETPVECTYPE (&buffer_defaults
, PVEC_BUFFER
);
5174 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
5175 XSETPVECTYPE (&buffer_local_symbols
, PVEC_BUFFER
);
5176 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
5178 /* Set up the default values of various buffer slots. */
5179 /* Must do these before making the first buffer! */
5181 /* real setup is done in bindings.el */
5182 buffer_defaults
.mode_line_format
= make_pure_c_string ("%-");
5183 buffer_defaults
.header_line_format
= Qnil
;
5184 buffer_defaults
.abbrev_mode
= Qnil
;
5185 buffer_defaults
.overwrite_mode
= Qnil
;
5186 buffer_defaults
.case_fold_search
= Qt
;
5187 buffer_defaults
.auto_fill_function
= Qnil
;
5188 buffer_defaults
.selective_display
= Qnil
;
5190 buffer_defaults
.selective_display_ellipses
= Qt
;
5192 buffer_defaults
.abbrev_table
= Qnil
;
5193 buffer_defaults
.display_table
= Qnil
;
5194 buffer_defaults
.undo_list
= Qnil
;
5195 buffer_defaults
.mark_active
= Qnil
;
5196 buffer_defaults
.file_format
= Qnil
;
5197 buffer_defaults
.auto_save_file_format
= Qt
;
5198 buffer_defaults
.overlays_before
= NULL
;
5199 buffer_defaults
.overlays_after
= NULL
;
5200 buffer_defaults
.overlay_center
= BEG
;
5202 XSETFASTINT (buffer_defaults
.tab_width
, 8);
5203 buffer_defaults
.truncate_lines
= Qnil
;
5204 buffer_defaults
.word_wrap
= Qnil
;
5205 buffer_defaults
.ctl_arrow
= Qt
;
5206 buffer_defaults
.bidi_display_reordering
= Qnil
;
5207 buffer_defaults
.direction_reversed
= Qnil
;
5208 buffer_defaults
.bidi_paragraph_direction
= Qnil
;
5209 buffer_defaults
.cursor_type
= Qt
;
5210 buffer_defaults
.extra_line_spacing
= Qnil
;
5211 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
5214 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5216 buffer_defaults
.enable_multibyte_characters
= Qt
;
5217 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5218 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5219 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5220 buffer_defaults
.cache_long_line_scans
= Qnil
;
5221 buffer_defaults
.file_truename
= Qnil
;
5222 XSETFASTINT (buffer_defaults
.display_count
, 0);
5223 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5224 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5225 buffer_defaults
.left_fringe_width
= Qnil
;
5226 buffer_defaults
.right_fringe_width
= Qnil
;
5227 buffer_defaults
.fringes_outside_margins
= Qnil
;
5228 buffer_defaults
.scroll_bar_width
= Qnil
;
5229 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5230 buffer_defaults
.indicate_empty_lines
= Qnil
;
5231 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5232 buffer_defaults
.fringe_indicator_alist
= Qnil
;
5233 buffer_defaults
.fringe_cursor_alist
= Qnil
;
5234 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5235 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5236 buffer_defaults
.display_time
= Qnil
;
5238 /* Assign the local-flags to the slots that have default values.
5239 The local flag is a bit that is used in the buffer
5240 to say that it has its own local value for the slot.
5241 The local flag bits are in the local_var_flags slot of the buffer. */
5243 /* Nothing can work if this isn't true */
5244 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5246 /* 0 means not a lisp var, -1 means always local, else mask */
5247 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5248 XSETINT (buffer_local_flags
.filename
, -1);
5249 XSETINT (buffer_local_flags
.directory
, -1);
5250 XSETINT (buffer_local_flags
.backed_up
, -1);
5251 XSETINT (buffer_local_flags
.save_length
, -1);
5252 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5253 XSETINT (buffer_local_flags
.read_only
, -1);
5254 XSETINT (buffer_local_flags
.major_mode
, -1);
5255 XSETINT (buffer_local_flags
.mode_name
, -1);
5256 XSETINT (buffer_local_flags
.undo_list
, -1);
5257 XSETINT (buffer_local_flags
.mark_active
, -1);
5258 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5259 XSETINT (buffer_local_flags
.file_truename
, -1);
5260 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5261 XSETINT (buffer_local_flags
.file_format
, -1);
5262 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5263 XSETINT (buffer_local_flags
.display_count
, -1);
5264 XSETINT (buffer_local_flags
.display_time
, -1);
5265 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5268 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5269 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5270 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5271 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5272 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5273 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5275 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5277 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5278 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5279 XSETFASTINT (buffer_local_flags
.word_wrap
, idx
); ++idx
;
5280 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5281 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5282 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5283 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5284 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5286 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5287 /* Make this one a permanent local. */
5288 buffer_permanent_local_flags
[idx
++] = 1;
5290 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5291 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5292 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5293 XSETFASTINT (buffer_local_flags
.bidi_display_reordering
, idx
); ++idx
;
5294 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5295 XSETFASTINT (buffer_local_flags
.bidi_paragraph_direction
, idx
); ++idx
;
5296 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5297 /* Make this one a permanent local. */
5298 buffer_permanent_local_flags
[idx
++] = 1;
5299 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5300 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5301 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5302 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5303 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5304 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5305 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5306 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5307 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5308 XSETFASTINT (buffer_local_flags
.fringe_indicator_alist
, idx
); ++idx
;
5309 XSETFASTINT (buffer_local_flags
.fringe_cursor_alist
, idx
); ++idx
;
5310 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5311 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5312 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5313 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5314 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5315 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5317 /* Need more room? */
5318 if (idx
>= MAX_PER_BUFFER_VARS
)
5320 last_per_buffer_idx
= idx
;
5322 Vbuffer_alist
= Qnil
;
5326 QSFundamental
= make_pure_c_string ("Fundamental");
5328 Qfundamental_mode
= intern_c_string ("fundamental-mode");
5329 buffer_defaults
.major_mode
= Qfundamental_mode
;
5331 Qmode_class
= intern_c_string ("mode-class");
5333 Qprotected_field
= intern_c_string ("protected-field");
5335 Qpermanent_local
= intern_c_string ("permanent-local");
5337 Qkill_buffer_hook
= intern_c_string ("kill-buffer-hook");
5338 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5340 Qucs_set_table_for_input
= intern_c_string ("ucs-set-table-for-input");
5342 /* super-magic invisible buffer */
5343 Vprin1_to_string_buffer
= Fget_buffer_create (make_pure_c_string (" prin1"));
5344 Vbuffer_alist
= Qnil
;
5346 Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*")));
5348 inhibit_modification_hooks
= 0;
5358 #ifdef USE_MMAP_FOR_BUFFERS
5360 /* When using the ralloc implementation based on mmap(2), buffer
5361 text pointers will have been set to null in the dumped Emacs.
5365 for (b
= all_buffers
; b
; b
= b
->next
)
5366 if (b
->text
->beg
== NULL
)
5367 enlarge_buffer_text (b
, 0);
5369 #endif /* USE_MMAP_FOR_BUFFERS */
5371 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5372 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5373 Fset_buffer_multibyte (Qnil
);
5375 pwd
= get_current_dir_name ();
5378 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5380 /* Maybe this should really use some standard subroutine
5381 whose definition is filename syntax dependent. */
5383 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5385 /* Grow buffer to add directory separator and '\0'. */
5386 pwd
= (char *) realloc (pwd
, len
+ 2);
5388 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5389 pwd
[len
] = DIRECTORY_SEP
;
5390 pwd
[len
+ 1] = '\0';
5393 current_buffer
->directory
= make_unibyte_string (pwd
, strlen (pwd
));
5394 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5395 /* At this moment, we still don't know how to decode the
5396 directory name. So, we keep the bytes in multibyte form so
5397 that ENCODE_FILE correctly gets the original bytes. */
5398 current_buffer
->directory
5399 = string_to_multibyte (current_buffer
->directory
);
5401 /* Add /: to the front of the name
5402 if it would otherwise be treated as magic. */
5403 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5405 /* If the default dir is just /, TEMP is non-nil
5406 because of the ange-ftp completion handler.
5407 However, it is not necessary to turn / into /:/.
5408 So avoid doing that. */
5409 && strcmp ("/", SDATA (current_buffer
->directory
)))
5410 current_buffer
->directory
5411 = concat2 (build_string ("/:"), current_buffer
->directory
);
5413 temp
= get_minibuffer (0);
5414 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5419 /* Similar to defvar_lisp but define a variable whose value is the Lisp
5420 Object stored in the current buffer. address is the address of the slot
5421 in the buffer that is current now. */
5423 /* TYPE is nil for a general Lisp variable.
5424 An integer specifies a type; then only LIsp values
5425 with that type code are allowed (except that nil is allowed too).
5426 LNAME is the LIsp-level variable name.
5427 VNAME is the name of the buffer slot.
5428 DOC is a dummy where you write the doc string as a comment. */
5429 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
5430 defvar_per_buffer (lname, vname, type, 0)
5433 defvar_per_buffer (namestring
, address
, type
, doc
)
5435 Lisp_Object
*address
;
5439 Lisp_Object sym
, val
;
5442 sym
= intern (namestring
);
5443 val
= allocate_misc ();
5444 offset
= (char *)address
- (char *)current_buffer
;
5446 XMISCTYPE (val
) = Lisp_Misc_Buffer_Objfwd
;
5447 XBUFFER_OBJFWD (val
)->offset
= offset
;
5448 XBUFFER_OBJFWD (val
)->slottype
= type
;
5449 SET_SYMBOL_VALUE (sym
, val
);
5450 PER_BUFFER_SYMBOL (offset
) = sym
;
5452 if (PER_BUFFER_IDX (offset
) == 0)
5453 /* Did a DEFVAR_PER_BUFFER without initializing the corresponding
5454 slot of buffer_local_flags */
5459 /* initialize the buffer routines */
5463 staticpro (&last_overlay_modification_hooks
);
5464 last_overlay_modification_hooks
5465 = Fmake_vector (make_number (10), Qnil
);
5467 staticpro (&Vbuffer_defaults
);
5468 staticpro (&Vbuffer_local_symbols
);
5469 staticpro (&Qfundamental_mode
);
5470 staticpro (&Qmode_class
);
5471 staticpro (&QSFundamental
);
5472 staticpro (&Vbuffer_alist
);
5473 staticpro (&Qprotected_field
);
5474 staticpro (&Qpermanent_local
);
5475 Qpermanent_local_hook
= intern_c_string ("permanent-local-hook");
5476 staticpro (&Qpermanent_local_hook
);
5477 staticpro (&Qkill_buffer_hook
);
5478 Qoverlayp
= intern_c_string ("overlayp");
5479 staticpro (&Qoverlayp
);
5480 Qevaporate
= intern_c_string ("evaporate");
5481 staticpro (&Qevaporate
);
5482 Qmodification_hooks
= intern_c_string ("modification-hooks");
5483 staticpro (&Qmodification_hooks
);
5484 Qinsert_in_front_hooks
= intern_c_string ("insert-in-front-hooks");
5485 staticpro (&Qinsert_in_front_hooks
);
5486 Qinsert_behind_hooks
= intern_c_string ("insert-behind-hooks");
5487 staticpro (&Qinsert_behind_hooks
);
5488 Qget_file_buffer
= intern_c_string ("get-file-buffer");
5489 staticpro (&Qget_file_buffer
);
5490 Qpriority
= intern_c_string ("priority");
5491 staticpro (&Qpriority
);
5492 Qwindow
= intern_c_string ("window");
5493 staticpro (&Qwindow
);
5494 Qbefore_string
= intern_c_string ("before-string");
5495 staticpro (&Qbefore_string
);
5496 Qafter_string
= intern_c_string ("after-string");
5497 staticpro (&Qafter_string
);
5498 Qfirst_change_hook
= intern_c_string ("first-change-hook");
5499 staticpro (&Qfirst_change_hook
);
5500 Qbefore_change_functions
= intern_c_string ("before-change-functions");
5501 staticpro (&Qbefore_change_functions
);
5502 Qafter_change_functions
= intern_c_string ("after-change-functions");
5503 staticpro (&Qafter_change_functions
);
5504 /* The next one is initialized in init_buffer_once. */
5505 staticpro (&Qucs_set_table_for_input
);
5507 Qkill_buffer_query_functions
= intern_c_string ("kill-buffer-query-functions");
5508 staticpro (&Qkill_buffer_query_functions
);
5510 Fput (Qprotected_field
, Qerror_conditions
,
5511 pure_cons (Qprotected_field
, pure_cons (Qerror
, Qnil
)));
5512 Fput (Qprotected_field
, Qerror_message
,
5513 make_pure_c_string ("Attempt to modify a protected field"));
5515 /* All these use DEFVAR_LISP_NOPRO because the slots in
5516 buffer_defaults will all be marked via Vbuffer_defaults. */
5518 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5519 &buffer_defaults
.mode_line_format
,
5520 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5521 This is the same as (default-value 'mode-line-format). */);
5523 DEFVAR_LISP_NOPRO ("default-header-line-format",
5524 &buffer_defaults
.header_line_format
,
5525 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5526 This is the same as (default-value 'header-line-format). */);
5528 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5529 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5530 This is the same as (default-value 'cursor-type). */);
5532 DEFVAR_LISP_NOPRO ("default-line-spacing",
5533 &buffer_defaults
.extra_line_spacing
,
5534 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5535 This is the same as (default-value 'line-spacing). */);
5537 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5538 &buffer_defaults
.cursor_in_non_selected_windows
,
5539 doc
: /* Default value of `cursor-in-non-selected-windows'.
5540 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5542 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5543 &buffer_defaults
.abbrev_mode
,
5544 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5545 This is the same as (default-value 'abbrev-mode). */);
5547 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5548 &buffer_defaults
.ctl_arrow
,
5549 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5550 This is the same as (default-value 'ctl-arrow). */);
5552 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5553 &buffer_defaults
.enable_multibyte_characters
,
5554 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5555 This is the same as (default-value 'enable-multibyte-characters). */);
5557 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5558 &buffer_defaults
.buffer_file_coding_system
,
5559 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5560 This is the same as (default-value 'buffer-file-coding-system). */);
5562 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5563 &buffer_defaults
.truncate_lines
,
5564 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5565 This is the same as (default-value 'truncate-lines). */);
5567 DEFVAR_LISP_NOPRO ("default-fill-column",
5568 &buffer_defaults
.fill_column
,
5569 doc
: /* Default value of `fill-column' for buffers that do not override it.
5570 This is the same as (default-value 'fill-column). */);
5572 DEFVAR_LISP_NOPRO ("default-left-margin",
5573 &buffer_defaults
.left_margin
,
5574 doc
: /* Default value of `left-margin' for buffers that do not override it.
5575 This is the same as (default-value 'left-margin). */);
5577 DEFVAR_LISP_NOPRO ("default-tab-width",
5578 &buffer_defaults
.tab_width
,
5579 doc
: /* Default value of `tab-width' for buffers that do not override it.
5580 This is the same as (default-value 'tab-width). */);
5582 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5583 &buffer_defaults
.case_fold_search
,
5584 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5585 This is the same as (default-value 'case-fold-search). */);
5588 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5589 &buffer_defaults
.buffer_file_type
,
5590 doc
: /* Default file type for buffers that do not override it.
5591 This is the same as (default-value 'buffer-file-type).
5592 The file type is nil for text, t for binary. */);
5595 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5596 &buffer_defaults
.left_margin_cols
,
5597 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5598 This is the same as (default-value 'left-margin-width). */);
5600 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5601 &buffer_defaults
.right_margin_cols
,
5602 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5603 This is the same as (default-value 'right-margin-width). */);
5605 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5606 &buffer_defaults
.left_fringe_width
,
5607 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5608 This is the same as (default-value 'left-fringe-width). */);
5610 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5611 &buffer_defaults
.right_fringe_width
,
5612 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5613 This is the same as (default-value 'right-fringe-width). */);
5615 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5616 &buffer_defaults
.fringes_outside_margins
,
5617 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5618 This is the same as (default-value 'fringes-outside-margins). */);
5620 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5621 &buffer_defaults
.scroll_bar_width
,
5622 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5623 This is the same as (default-value 'scroll-bar-width). */);
5625 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5626 &buffer_defaults
.vertical_scroll_bar_type
,
5627 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5628 This is the same as (default-value 'vertical-scroll-bar). */);
5630 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5631 &buffer_defaults
.indicate_empty_lines
,
5632 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5633 This is the same as (default-value 'indicate-empty-lines). */);
5635 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5636 &buffer_defaults
.indicate_buffer_boundaries
,
5637 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5638 This is the same as (default-value 'indicate-buffer-boundaries). */);
5640 DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
5641 &buffer_defaults
.fringe_indicator_alist
,
5642 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5643 This is the same as (default-value 'fringe-indicator-alist'). */);
5645 DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
5646 &buffer_defaults
.fringe_cursor_alist
,
5647 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5648 This is the same as (default-value 'fringe-cursor-alist'). */);
5650 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5651 &buffer_defaults
.scroll_up_aggressively
,
5652 doc
: /* Default value of `scroll-up-aggressively'.
5653 This value applies in buffers that don't have their own local values.
5654 This is the same as (default-value 'scroll-up-aggressively). */);
5656 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5657 &buffer_defaults
.scroll_down_aggressively
,
5658 doc
: /* Default value of `scroll-down-aggressively'.
5659 This value applies in buffers that don't have their own local values.
5660 This is the same as (default-value 'scroll-down-aggressively). */);
5662 DEFVAR_PER_BUFFER ("header-line-format",
5663 ¤t_buffer
->header_line_format
,
5665 doc
: /* Analogous to `mode-line-format', but controls the header line.
5666 The header line appears, optionally, at the top of a window;
5667 the mode line appears at the bottom. */);
5669 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5671 doc
: /* Template for displaying mode line for current buffer.
5672 Each buffer has its own value of this variable.
5673 Value may be nil, a string, a symbol or a list or cons cell.
5674 A value of nil means don't display a mode line.
5675 For a symbol, its value is used (but it is ignored if t or nil).
5676 A string appearing directly as the value of a symbol is processed verbatim
5677 in that the %-constructs below are not recognized.
5678 Note that unless the symbol is marked as a `risky-local-variable', all
5679 properties in any strings, as well as all :eval and :propertize forms
5680 in the value of that symbol will be ignored.
5681 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5682 is used as a mode line element. Be careful--FORM should not load any files,
5683 because that can cause an infinite recursion.
5684 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5685 with the specified properties PROPS applied.
5686 For a list whose car is a symbol, the symbol's value is taken,
5687 and if that is non-nil, the cadr of the list is processed recursively.
5688 Otherwise, the caddr of the list (if there is one) is processed.
5689 For a list whose car is a string or list, each element is processed
5690 recursively and the results are effectively concatenated.
5691 For a list whose car is an integer, the cdr of the list is processed
5692 and padded (if the number is positive) or truncated (if negative)
5693 to the width specified by that number.
5694 A string is printed verbatim in the mode line except for %-constructs:
5695 (%-constructs are allowed when the string is the entire mode-line-format
5696 or when it is found in a cons-cell or a list)
5697 %b -- print buffer name. %f -- print visited file name.
5698 %F -- print frame name.
5699 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5700 %& is like %*, but ignore read-only-ness.
5701 % means buffer is read-only and * means it is modified.
5702 For a modified read-only buffer, %* gives % and %+ gives *.
5703 %s -- print process status. %l -- print the current line number.
5704 %c -- print the current column number (this makes editing slower).
5705 To make the column number update correctly in all cases,
5706 `column-number-mode' must be non-nil.
5707 %i -- print the size of the buffer.
5708 %I -- like %i, but use k, M, G, etc., to abbreviate.
5709 %p -- print percent of buffer above top of window, or Top, Bot or All.
5710 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5711 or print Bottom or All.
5712 %n -- print Narrow if appropriate.
5713 %t -- visited file is text or binary (if OS supports this distinction).
5714 %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
5715 %Z -- like %z, but including the end-of-line format.
5716 %e -- print error message about full memory.
5717 %@ -- print @ or hyphen. @ means that default-directory is on a
5719 %[ -- print one [ for each recursive editing level. %] similar.
5720 %% -- print %. %- -- print infinitely many dashes.
5721 Decimal digits after the % specify field width to which to pad. */);
5723 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5724 doc
: /* *Value of `major-mode' for new buffers. */);
5726 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5727 make_number (Lisp_Symbol
),
5728 doc
: /* Symbol for current buffer's major mode.
5729 The default value (normally `fundamental-mode') affects new buffers.
5730 A value of nil means to use the current buffer's major mode, provided
5731 it is not marked as "special".
5733 When a mode is used by default, `find-file' switches to it before it
5734 reads the contents into the buffer and before it finishes setting up
5735 the buffer. Thus, the mode and its hooks should not expect certain
5736 variables such as `buffer-read-only' and `buffer-file-coding-system'
5739 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5741 doc
: /* Pretty name of current buffer's major mode.
5742 Usually a string, but can use any of the constructs for `mode-line-format',
5744 Format with `format-mode-line' to produce a string value. */);
5746 DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer
->abbrev_table
, Qnil
,
5747 doc
: /* Local (mode-specific) abbrev table of current buffer. */);
5749 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5750 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5752 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5754 doc
: /* *Non-nil if searches and matches should ignore case. */);
5756 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5757 make_number (LISP_INT_TAG
),
5758 doc
: /* *Column beyond which automatic line-wrapping should happen.
5759 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5761 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5762 make_number (LISP_INT_TAG
),
5763 doc
: /* *Column for the default `indent-line-function' to indent to.
5764 Linefeed indents to this column in Fundamental mode. */);
5766 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5767 make_number (LISP_INT_TAG
),
5768 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5770 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5771 doc
: /* *Non-nil means display control chars with uparrow.
5772 A value of nil means use backslash and octal digits.
5773 This variable does not apply to characters whose display is specified
5774 in the current display table (if there is one). */);
5776 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5777 ¤t_buffer
->enable_multibyte_characters
,
5779 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5780 Otherwise they are regarded as unibyte. This affects the display,
5781 file I/O and the behavior of various editing commands.
5783 This variable is buffer-local but you cannot set it directly;
5784 use the function `set-buffer-multibyte' to change a buffer's representation.
5785 Changing its default value with `setq-default' is supported.
5786 See also variable `default-enable-multibyte-characters' and Info node
5787 `(elisp)Text Representations'. */);
5788 XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant
= 1;
5790 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5791 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5792 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5793 This variable applies to saving the buffer, and also to `write-region'
5794 and other functions that use `write-region'.
5795 It does not apply to sending output to subprocesses, however.
5797 If this is nil, the buffer is saved without any code conversion
5798 unless some coding system is specified in `file-coding-system-alist'
5799 for the buffer file.
5801 If the text to be saved cannot be encoded as specified by this variable,
5802 an alternative encoding is selected by `select-safe-coding-system', which see.
5804 The variable `coding-system-for-write', if non-nil, overrides this variable.
5806 This variable is never applied to a way of decoding a file while reading it. */);
5808 DEFVAR_PER_BUFFER ("direction-reversed",
5809 ¤t_buffer
->direction_reversed
, Qnil
,
5810 doc
: /* Non-nil means set beginning of lines at the right edge of the window.
5811 See also the variable `bidi-display-reordering'. */);
5813 DEFVAR_PER_BUFFER ("bidi-display-reordering",
5814 ¤t_buffer
->bidi_display_reordering
, Qnil
,
5815 doc
: /* Non-nil means reorder bidirectional text for display in the visual order.
5816 See also the variable `direction-reversed'. */);
5818 DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
5819 ¤t_buffer
->bidi_paragraph_direction
, Qnil
,
5820 doc
: /* *If non-nil, forces directionality of text paragraphs in the buffer.
5822 If this is nil (the default), the direction of each paragraph is
5823 determined by the first strong directional character of its text.
5824 The values of `right-to-left' and `left-to-right' override that.
5825 Any other value is treated as nil.
5827 This variable has no effect unless the buffer's value of
5828 \`bidi-display-reordering' is non-nil. */);
5830 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5831 doc
: /* *Non-nil means do not display continuation lines.
5832 Instead, give each line of text just one screen line.
5834 Note that this is overridden by the variable
5835 `truncate-partial-width-windows' if that variable is non-nil
5836 and this buffer is not full-frame width. */);
5838 DEFVAR_PER_BUFFER ("word-wrap", ¤t_buffer
->word_wrap
, Qnil
,
5839 doc
: /* *Non-nil means to use word-wrapping for continuation lines.
5840 When word-wrapping is on, continuation lines are wrapped at the space
5841 or tab character nearest to the right window edge.
5842 If nil, continuation lines are wrapped at the right screen edge.
5844 This variable has no effect if long lines are truncated (see
5845 `truncate-lines' and `truncate-partial-width-windows'). If you use
5846 word-wrapping, you might want to reduce the value of
5847 `truncate-partial-width-windows', since wrapping can make text readable
5848 in narrower windows. */);
5851 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5853 doc
: /* Non-nil if the visited file is a binary file.
5854 This variable is meaningful on MS-DOG and Windows NT.
5855 On those systems, it is automatically local in every buffer.
5856 On other systems, this variable is normally always nil. */);
5859 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5860 make_number (Lisp_String
),
5861 doc
: /* Name of default directory of current buffer. Should end with slash.
5862 To interactively change the default directory, use command `cd'. */);
5864 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5866 doc
: /* Function called (if non-nil) to perform auto-fill.
5867 It is called after self-inserting any character specified in
5868 the `auto-fill-chars' table.
5869 NOTE: This variable is not a hook;
5870 its value may not be a list of functions. */);
5872 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5873 make_number (Lisp_String
),
5874 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5876 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5877 make_number (Lisp_String
),
5878 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5879 The truename of a file is calculated by `file-truename'
5880 and then abbreviated with `abbreviate-file-name'. */);
5882 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5883 ¤t_buffer
->auto_save_file_name
,
5884 make_number (Lisp_String
),
5885 doc
: /* Name of file for auto-saving current buffer.
5886 If it is nil, that means don't auto-save this buffer. */);
5888 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5889 doc
: /* Non-nil if this buffer is read-only. */);
5891 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5892 doc
: /* Non-nil if this buffer's file has been backed up.
5893 Backing up is done before the first time the file is saved. */);
5895 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5896 make_number (LISP_INT_TAG
),
5897 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5899 -1 means auto-saving turned off until next real save.
5901 If you set this to -2, that means don't turn off auto-saving in this buffer
5902 if its text size shrinks. If you use `buffer-swap-text' on a buffer,
5903 you probably should set this to -2 in that buffer. */);
5905 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5907 doc
: /* Non-nil enables selective display.
5908 An integer N as value means display only lines
5909 that start with less than N columns of space.
5910 A value of t means that the character ^M makes itself and
5911 all the rest of the line invisible; also, when saving the buffer
5912 in a file, save the ^M as a newline. */);
5915 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5916 ¤t_buffer
->selective_display_ellipses
,
5918 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5921 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5922 doc
: /* Non-nil if self-insertion should replace existing text.
5923 The value should be one of `overwrite-mode-textual',
5924 `overwrite-mode-binary', or nil.
5925 If it is `overwrite-mode-textual', self-insertion still
5926 inserts at the end of a line, and inserts when point is before a tab,
5927 until the tab is filled in.
5928 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5930 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5932 doc
: /* Display table that controls display of the contents of current buffer.
5934 If this variable is nil, the value of `standard-display-table' is used.
5935 Each window can have its own, overriding display table, see
5936 `set-window-display-table' and `window-display-table'.
5938 The display table is a char-table created with `make-display-table'.
5939 A char-table is an array indexed by character codes. Normal array
5940 primitives `aref' and `aset' can be used to access elements of a char-table.
5942 Each of the char-table elements control how to display the corresponding
5943 text character: the element at index C in the table says how to display
5944 the character whose code is C. Each element should be a vector of
5945 characters or nil. The value nil means display the character in the
5946 default fashion; otherwise, the characters from the vector are delivered
5947 to the screen instead of the original character.
5949 For example, (aset buffer-display-table ?X [?Y]) tells Emacs
5950 to display a capital Y instead of each X character.
5952 In addition, a char-table has six extra slots to control the display of:
5954 the end of a truncated screen line (extra-slot 0, a single character);
5955 the end of a continued line (extra-slot 1, a single character);
5956 the escape character used to display character codes in octal
5957 (extra-slot 2, a single character);
5958 the character used as an arrow for control characters (extra-slot 3,
5959 a single character);
5960 the decoration indicating the presence of invisible lines (extra-slot 4,
5961 a vector of characters);
5962 the character used to draw the border between side-by-side windows
5963 (extra-slot 5, a single character).
5965 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5967 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5969 doc
: /* *Width of left marginal area for display of a buffer.
5970 A value of nil means no marginal area. */);
5972 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5974 doc
: /* *Width of right marginal area for display of a buffer.
5975 A value of nil means no marginal area. */);
5977 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5979 doc
: /* *Width of this buffer's left fringe (in pixels).
5980 A value of 0 means no left fringe is shown in this buffer's window.
5981 A value of nil means to use the left fringe width from the window's frame. */);
5983 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5985 doc
: /* *Width of this buffer's right fringe (in pixels).
5986 A value of 0 means no right fringe is shown in this buffer's window.
5987 A value of nil means to use the right fringe width from the window's frame. */);
5989 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5991 doc
: /* *Non-nil means to display fringes outside display margins.
5992 A value of nil means to display fringes between margins and buffer text. */);
5994 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5996 doc
: /* *Width of this buffer's scroll bars in pixels.
5997 A value of nil means to use the scroll bar width from the window's frame. */);
5999 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
6001 doc
: /* *Position of this buffer's vertical scroll bar.
6002 The value takes effect whenever you tell a window to display this buffer;
6003 for instance, with `set-window-buffer' or when `display-buffer' displays it.
6005 A value of `left' or `right' means put the vertical scroll bar at that side
6006 of the window; a value of nil means don't show any vertical scroll bars.
6007 A value of t (the default) means do whatever the window's frame specifies. */);
6009 DEFVAR_PER_BUFFER ("indicate-empty-lines",
6010 ¤t_buffer
->indicate_empty_lines
, Qnil
,
6011 doc
: /* *Visually indicate empty lines after the buffer end.
6012 If non-nil, a bitmap is displayed in the left fringe of a window on
6013 window-systems. */);
6015 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
6016 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
6017 doc
: /* *Visually indicate buffer boundaries and scrolling.
6018 If non-nil, the first and last line of the buffer are marked in the fringe
6019 of a window on window-systems with angle bitmaps, or if the window can be
6020 scrolled, the top and bottom line of the window are marked with up and down
6023 If value is a symbol `left' or `right', both angle and arrow bitmaps
6024 are displayed in the left or right fringe, resp. Any other value
6025 that doesn't look like an alist means display the angle bitmaps in
6026 the left fringe but no arrows.
6028 You can exercise more precise control by using an alist as the
6029 value. Each alist element (INDICATOR . POSITION) specifies
6030 where to show one of the indicators. INDICATOR is one of `top',
6031 `bottom', `up', `down', or t, which specifies the default position,
6032 and POSITION is one of `left', `right', or nil, meaning do not show
6035 For example, ((top . left) (t . right)) places the top angle bitmap in
6036 left fringe, the bottom angle bitmap in right fringe, and both arrow
6037 bitmaps in right fringe. To show just the angle bitmaps in the left
6038 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
6040 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
6041 ¤t_buffer
->fringe_indicator_alist
, Qnil
,
6042 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
6043 The value is an alist where each element (INDICATOR . BITMAPS)
6044 specifies the fringe bitmaps used to display a specific logical
6047 INDICATOR specifies the logical indicator type which is one of the
6048 following symbols: `truncation' , `continuation', `overlay-arrow',
6049 `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'.
6051 BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
6052 the actual bitmap shown in the left or right fringe for the logical
6053 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
6054 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
6055 are used only for the `bottom' and `one-line' indicators when the last
6056 \(only) line in has no final newline. BITMAPS may also be a single
6057 symbol which is used in both left and right fringes. */);
6059 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
6060 ¤t_buffer
->fringe_cursor_alist
, Qnil
,
6061 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
6062 The value is an alist where each element (CURSOR . BITMAP)
6063 specifies the fringe bitmaps used to display a specific logical
6064 cursor type in the fringe.
6066 CURSOR specifies the logical cursor type which is one of the following
6067 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
6068 one is used to show a hollow cursor on narrow lines display lines
6069 where the normal hollow cursor will not fit.
6071 BITMAP is the corresponding fringe bitmap shown for the logical
6074 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
6075 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
6076 doc
: /* How far to scroll windows upward.
6077 If you move point off the bottom, the window scrolls automatically.
6078 This variable controls how far it scrolls. The value nil, the default,
6079 means scroll to center point. A fraction means scroll to put point
6080 that fraction of the window's height from the bottom of the window.
6081 When the value is 0.0, point goes at the bottom line, which in the
6082 simple case that you moved off with C-f means scrolling just one line.
6083 1.0 means point goes at the top, so that in that simple case, the
6084 window scrolls by a full window height. Meaningful values are
6085 between 0.0 and 1.0, inclusive. */);
6087 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
6088 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
6089 doc
: /* How far to scroll windows downward.
6090 If you move point off the top, the window scrolls automatically.
6091 This variable controls how far it scrolls. The value nil, the default,
6092 means scroll to center point. A fraction means scroll to put point
6093 that fraction of the window's height from the top of the window.
6094 When the value is 0.0, point goes at the top line, which in the
6095 simple case that you moved off with C-b means scrolling just one line.
6096 1.0 means point goes at the bottom, so that in that simple case, the
6097 window scrolls by a full window height. Meaningful values are
6098 between 0.0 and 1.0, inclusive. */);
6100 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
6104 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
6105 doc
: /* List of functions to call before each text change.
6106 Two arguments are passed to each function: the positions of
6107 the beginning and end of the range of old text to be changed.
6108 \(For an insertion, the beginning and end are at the same place.)
6109 No information is given about the length of the text after the change.
6111 Buffer changes made while executing the `before-change-functions'
6112 don't call any before-change or after-change functions.
6113 That's because these variables are temporarily set to nil.
6114 As a result, a hook function cannot straightforwardly alter the
6115 value of these variables. See the Emacs Lisp manual for a way of
6116 accomplishing an equivalent result by using other variables.
6118 If an unhandled error happens in running these functions,
6119 the variable's value remains nil. That prevents the error
6120 from happening repeatedly and making Emacs nonfunctional. */);
6121 Vbefore_change_functions
= Qnil
;
6123 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
6124 doc
: /* List of functions to call after each text change.
6125 Three arguments are passed to each function: the positions of
6126 the beginning and end of the range of changed text,
6127 and the length in bytes of the pre-change text replaced by that range.
6128 \(For an insertion, the pre-change length is zero;
6129 for a deletion, that length is the number of bytes deleted,
6130 and the post-change beginning and end are at the same place.)
6132 Buffer changes made while executing the `after-change-functions'
6133 don't call any before-change or after-change functions.
6134 That's because these variables are temporarily set to nil.
6135 As a result, a hook function cannot straightforwardly alter the
6136 value of these variables. See the Emacs Lisp manual for a way of
6137 accomplishing an equivalent result by using other variables.
6139 If an unhandled error happens in running these functions,
6140 the variable's value remains nil. That prevents the error
6141 from happening repeatedly and making Emacs nonfunctional. */);
6142 Vafter_change_functions
= Qnil
;
6144 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
6145 doc
: /* A list of functions to call before changing a buffer which is unmodified.
6146 The functions are run using the `run-hooks' function. */);
6147 Vfirst_change_hook
= Qnil
;
6149 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
6150 doc
: /* List of undo entries in current buffer.
6151 Recent changes come first; older changes follow newer.
6153 An entry (BEG . END) represents an insertion which begins at
6154 position BEG and ends at position END.
6156 An entry (TEXT . POSITION) represents the deletion of the string TEXT
6157 from (abs POSITION). If POSITION is positive, point was at the front
6158 of the text being deleted; if negative, point was at the end.
6160 An entry (t HIGH . LOW) indicates that the buffer previously had
6161 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
6162 of the visited file's modification time, as of that time. If the
6163 modification time of the most recent save is different, this entry is
6166 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
6167 was modified between BEG and END. PROPERTY is the property name,
6168 and VALUE is the old value.
6170 An entry (apply FUN-NAME . ARGS) means undo the change with
6171 \(apply FUN-NAME ARGS).
6173 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
6174 in the active region. BEG and END is the range affected by this entry
6175 and DELTA is the number of bytes added or deleted in that range by
6178 An entry (MARKER . DISTANCE) indicates that the marker MARKER
6179 was adjusted in position by the offset DISTANCE (an integer).
6181 An entry of the form POSITION indicates that point was at the buffer
6182 location given by the integer. Undoing an entry of this form places
6185 Entries with value `nil' mark undo boundaries. The undo command treats
6186 the changes between two undo boundaries as a single step to be undone.
6188 If the value of the variable is t, undo information is not recorded. */);
6190 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
6191 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
6193 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
6194 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
6196 Normally, the line-motion functions work by scanning the buffer for
6197 newlines. Columnar operations (like `move-to-column' and
6198 `compute-motion') also work by scanning the buffer, summing character
6199 widths as they go. This works well for ordinary text, but if the
6200 buffer's lines are very long (say, more than 500 characters), these
6201 motion functions will take longer to execute. Emacs may also take
6202 longer to update the display.
6204 If `cache-long-line-scans' is non-nil, these motion functions cache the
6205 results of their scans, and consult the cache to avoid rescanning
6206 regions of the buffer until the text is modified. The caches are most
6207 beneficial when they prevent the most searching---that is, when the
6208 buffer contains long lines and large regions of characters with the
6209 same, fixed screen width.
6211 When `cache-long-line-scans' is non-nil, processing short lines will
6212 become slightly slower (because of the overhead of consulting the
6213 cache), and the caches will use memory roughly proportional to the
6214 number of newlines and characters whose screen width varies.
6216 The caches require no explicit maintenance; their accuracy is
6217 maintained internally by the Emacs primitives. Enabling or disabling
6218 the cache should not affect the behavior of any of the motion
6219 functions; it should only affect their performance. */);
6221 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
6222 doc
: /* Value of point before the last series of scroll operations, or nil. */);
6224 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
6225 doc
: /* List of formats to use when saving this buffer.
6226 Formats are defined by `format-alist'. This variable is
6227 set when a file is visited. */);
6229 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
6230 ¤t_buffer
->auto_save_file_format
, Qnil
,
6231 doc
: /* *Format in which to write auto-save files.
6232 Should be a list of symbols naming formats that are defined in `format-alist'.
6233 If it is t, which is the default, auto-save files are written in the
6234 same format as a regular save would use. */);
6236 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
6237 ¤t_buffer
->invisibility_spec
, Qnil
,
6238 doc
: /* Invisibility spec of this buffer.
6239 The default is t, which means that text is invisible
6240 if it has a non-nil `invisible' property.
6241 If the value is a list, a text character is invisible if its `invisible'
6242 property is an element in that list (or is a list with members in common).
6243 If an element is a cons cell of the form (PROP . ELLIPSIS),
6244 then characters with property value PROP are invisible,
6245 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
6247 DEFVAR_PER_BUFFER ("buffer-display-count",
6248 ¤t_buffer
->display_count
, Qnil
,
6249 doc
: /* A number incremented each time this buffer is displayed in a window.
6250 The function `set-window-buffer' increments it. */);
6252 DEFVAR_PER_BUFFER ("buffer-display-time",
6253 ¤t_buffer
->display_time
, Qnil
,
6254 doc
: /* Time stamp updated each time this buffer is displayed in a window.
6255 The function `set-window-buffer' updates this variable
6256 to the value obtained by calling `current-time'.
6257 If the buffer has never been shown in a window, the value is nil. */);
6259 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
6261 Vtransient_mark_mode
= Qnil
;
6262 /* The docstring is in simple.el. If we put it here, it would be
6263 overwritten when transient-mark-mode is defined using
6264 define-minor-mode. */
6266 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
6267 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
6268 If the value is t, disregard `buffer-read-only' and all `read-only'
6269 text properties. If the value is a list, disregard `buffer-read-only'
6270 and disregard a `read-only' text property if the property value
6271 is a member of the list. */);
6272 Vinhibit_read_only
= Qnil
;
6274 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
6275 doc
: /* Cursor to use when this buffer is in the selected window.
6276 Values are interpreted as follows:
6278 t use the cursor specified for the frame
6279 nil don't display a cursor
6280 box display a filled box cursor
6281 hollow display a hollow box cursor
6282 bar display a vertical bar cursor with default width
6283 (bar . WIDTH) display a vertical bar cursor with width WIDTH
6284 hbar display a horizontal bar cursor with default height
6285 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
6286 ANYTHING ELSE display a hollow box cursor
6288 When the buffer is displayed in a non-selected window, the
6289 cursor's appearance is instead controlled by the variable
6290 `cursor-in-non-selected-windows'. */);
6292 DEFVAR_PER_BUFFER ("line-spacing",
6293 ¤t_buffer
->extra_line_spacing
, Qnil
,
6294 doc
: /* Additional space to put between lines when displaying a buffer.
6295 The space is measured in pixels, and put below lines on graphic displays,
6296 see `display-graphic-p'.
6297 If value is a floating point number, it specifies the spacing relative
6298 to the default frame line height. A value of nil means add no extra space. */);
6300 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6301 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
6302 doc
: /* *Cursor type to display in non-selected windows.
6303 The value t means to use hollow box cursor. See `cursor-type' for other values. */);
6305 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
6306 doc
: /* List of functions called with no args to query before killing a buffer.
6307 The buffer being killed will be current while the functions are running.
6308 If any of them returns nil, the buffer is not killed. */);
6309 Vkill_buffer_query_functions
= Qnil
;
6311 DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook
,
6312 doc
: /* Normal hook run before changing the major mode of a buffer.
6313 The function `kill-all-local-variables' runs this before doing anything else. */);
6314 Vchange_major_mode_hook
= Qnil
;
6315 Qchange_major_mode_hook
= intern_c_string ("change-major-mode-hook");
6316 staticpro (&Qchange_major_mode_hook
);
6318 defsubr (&Sbuffer_live_p
);
6319 defsubr (&Sbuffer_list
);
6320 defsubr (&Sget_buffer
);
6321 defsubr (&Sget_file_buffer
);
6322 defsubr (&Sget_buffer_create
);
6323 defsubr (&Smake_indirect_buffer
);
6324 defsubr (&Sgenerate_new_buffer_name
);
6325 defsubr (&Sbuffer_name
);
6326 /*defsubr (&Sbuffer_number);*/
6327 defsubr (&Sbuffer_file_name
);
6328 defsubr (&Sbuffer_base_buffer
);
6329 defsubr (&Sbuffer_local_value
);
6330 defsubr (&Sbuffer_local_variables
);
6331 defsubr (&Sbuffer_modified_p
);
6332 defsubr (&Sset_buffer_modified_p
);
6333 defsubr (&Sbuffer_modified_tick
);
6334 defsubr (&Sbuffer_chars_modified_tick
);
6335 defsubr (&Srename_buffer
);
6336 defsubr (&Sother_buffer
);
6337 defsubr (&Sbuffer_enable_undo
);
6338 defsubr (&Skill_buffer
);
6339 defsubr (&Sset_buffer_major_mode
);
6340 defsubr (&Sswitch_to_buffer
);
6341 defsubr (&Scurrent_buffer
);
6342 defsubr (&Sset_buffer
);
6343 defsubr (&Sbarf_if_buffer_read_only
);
6344 defsubr (&Sbury_buffer
);
6345 defsubr (&Serase_buffer
);
6346 defsubr (&Sbuffer_swap_text
);
6347 defsubr (&Sset_buffer_multibyte
);
6348 defsubr (&Skill_all_local_variables
);
6350 defsubr (&Soverlayp
);
6351 defsubr (&Smake_overlay
);
6352 defsubr (&Sdelete_overlay
);
6353 defsubr (&Smove_overlay
);
6354 defsubr (&Soverlay_start
);
6355 defsubr (&Soverlay_end
);
6356 defsubr (&Soverlay_buffer
);
6357 defsubr (&Soverlay_properties
);
6358 defsubr (&Soverlays_at
);
6359 defsubr (&Soverlays_in
);
6360 defsubr (&Snext_overlay_change
);
6361 defsubr (&Sprevious_overlay_change
);
6362 defsubr (&Soverlay_recenter
);
6363 defsubr (&Soverlay_lists
);
6364 defsubr (&Soverlay_get
);
6365 defsubr (&Soverlay_put
);
6366 defsubr (&Srestore_buffer_modified_p
);
6372 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6373 initial_define_key (control_x_map
, 'k', "kill-buffer");
6375 /* This must not be in syms_of_buffer, because Qdisabled is not
6376 initialized when that function gets called. */
6377 Fput (intern_c_string ("erase-buffer"), Qdisabled
, Qt
);
6380 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6381 (do not change this comment) */