1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000, 2001, 02, 03, 2004
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1 [probably SunOS? -stef] , param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
44 #include "intervals.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 DECL_ALIGN (struct buffer
, buffer_defaults
);
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
93 zero, that is a bug */
95 struct buffer buffer_local_flags
;
97 /* This structure holds the names of symbols whose values may be
98 buffer-local. It is indexed and accessed in the same way as the above. */
100 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
102 /* A Lisp_Object pointer to the above, used for staticpro */
103 static Lisp_Object Vbuffer_local_symbols
;
105 /* This structure holds the required types for the values in the
106 buffer-local slots. If a slot contains Qnil, then the
107 corresponding buffer slot may contain a value of any type. If a
108 slot contains an integer, then prospective values' tags must be
109 equal to that integer (except nil is always allowed).
110 When a tag does not match, the function
111 buffer_slot_type_mismatch will signal an error.
113 If a slot here contains -1, the corresponding variable is read-only. */
114 struct buffer buffer_local_types
;
116 /* Flags indicating which built-in buffer-local variables
117 are permanent locals. */
118 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
120 /* Number of per-buffer variables used. */
122 int last_per_buffer_idx
;
124 Lisp_Object
Fset_buffer ();
125 void set_buffer_internal ();
126 void set_buffer_internal_1 ();
127 static void call_overlay_mod_hooks ();
128 static void swap_out_buffer_local_variables ();
129 static void reset_buffer_local_variables ();
131 /* Alist of all buffer names vs the buffers. */
132 /* This used to be a variable, but is no longer,
133 to prevent lossage due to user rplac'ing this alist or its elements. */
134 Lisp_Object Vbuffer_alist
;
136 /* Functions to call before and after each text change. */
137 Lisp_Object Vbefore_change_functions
;
138 Lisp_Object Vafter_change_functions
;
140 Lisp_Object Vtransient_mark_mode
;
142 /* t means ignore all read-only text properties.
143 A list means ignore such a property if its value is a member of the list.
144 Any non-nil value means ignore buffer-read-only. */
145 Lisp_Object Vinhibit_read_only
;
147 /* List of functions to call that can query about killing a buffer.
148 If any of these functions returns nil, we don't kill it. */
149 Lisp_Object Vkill_buffer_query_functions
;
150 Lisp_Object Qkill_buffer_query_functions
;
152 /* List of functions to call before changing an unmodified buffer. */
153 Lisp_Object Vfirst_change_hook
;
155 Lisp_Object Qfirst_change_hook
;
156 Lisp_Object Qbefore_change_functions
;
157 Lisp_Object Qafter_change_functions
;
158 Lisp_Object Qucs_set_table_for_input
;
160 /* If nonzero, all modification hooks are suppressed. */
161 int inhibit_modification_hooks
;
163 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
165 Lisp_Object Qprotected_field
;
167 Lisp_Object QSFundamental
; /* A string "Fundamental" */
169 Lisp_Object Qkill_buffer_hook
;
171 Lisp_Object Qget_file_buffer
;
173 Lisp_Object Qoverlayp
;
175 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
177 Lisp_Object Qmodification_hooks
;
178 Lisp_Object Qinsert_in_front_hooks
;
179 Lisp_Object Qinsert_behind_hooks
;
181 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
182 static void free_buffer_text
P_ ((struct buffer
*b
));
183 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
184 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
187 /* For debugging; temporary. See set_buffer_internal. */
188 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
195 error ("No buffer named %s", SDATA (spec
));
196 error ("Invalid buffer argument");
199 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
200 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
201 Value is nil if OBJECT is not a buffer or if it has been killed. */)
205 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
209 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
210 doc
: /* Return a list of all existing live buffers.
211 If the optional arg FRAME is a frame, we return the buffer list
212 in the proper order for that frame: the buffers in FRAME's `buffer-list'
213 frame parameter come first, followed by the rest of the buffers. */)
217 Lisp_Object framelist
, general
;
218 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
226 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
228 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
230 while (! NILP (tail
))
232 general
= Fdelq (XCAR (tail
), general
);
235 return nconc2 (framelist
, general
);
241 /* Like Fassoc, but use Fstring_equal to compare
242 (which ignores text properties),
243 and don't ever QUIT. */
246 assoc_ignore_text_properties (key
, list
)
247 register Lisp_Object key
;
250 register Lisp_Object tail
;
251 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
253 register Lisp_Object elt
, tem
;
255 tem
= Fstring_equal (Fcar (elt
), key
);
262 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
263 doc
: /* Return the buffer named NAME (a string).
264 If there is no live buffer named NAME, return nil.
265 NAME may also be a buffer; if so, the value is that buffer. */)
267 register Lisp_Object name
;
273 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
276 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
277 doc
: /* Return the buffer visiting file FILENAME (a string).
278 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
279 If there is no such live buffer, return nil.
280 See also `find-buffer-visiting'. */)
282 register Lisp_Object filename
;
284 register Lisp_Object tail
, buf
, tem
;
287 CHECK_STRING (filename
);
288 filename
= Fexpand_file_name (filename
, Qnil
);
290 /* If the file name has special constructs in it,
291 call the corresponding file handler. */
292 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
294 return call2 (handler
, Qget_file_buffer
, filename
);
296 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
298 buf
= Fcdr (XCAR (tail
));
299 if (!BUFFERP (buf
)) continue;
300 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
301 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
309 get_truename_buffer (filename
)
310 register Lisp_Object filename
;
312 register Lisp_Object tail
, buf
, tem
;
314 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
316 buf
= Fcdr (XCAR (tail
));
317 if (!BUFFERP (buf
)) continue;
318 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
319 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
326 /* Incremented for each buffer created, to assign the buffer number. */
329 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
330 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
331 A new buffer is created if there is no live buffer named NAME.
332 If NAME starts with a space, the new buffer does not keep undo information.
333 If NAME is a buffer instead of a string, then it is the value returned.
334 The value is never nil. */)
336 register Lisp_Object name
;
338 register Lisp_Object buf
;
339 register struct buffer
*b
;
341 buf
= Fget_buffer (name
);
345 if (SCHARS (name
) == 0)
346 error ("Empty string for buffer name is not allowed");
348 b
= (struct buffer
*) allocate_buffer ();
350 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
352 /* An ordinary buffer uses its own struct buffer_text. */
353 b
->text
= &b
->own_text
;
356 BUF_GAP_SIZE (b
) = 20;
358 /* We allocate extra 1-byte at the tail and keep it always '\0' for
359 anchoring a search. */
360 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
362 if (! BUF_BEG_ADDR (b
))
363 buffer_memory_full ();
370 BUF_PT_BYTE (b
) = BEG_BYTE
;
371 BUF_GPT_BYTE (b
) = BEG_BYTE
;
372 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
373 BUF_ZV_BYTE (b
) = BEG_BYTE
;
374 BUF_Z_BYTE (b
) = BEG_BYTE
;
376 BUF_OVERLAY_MODIFF (b
) = 1;
377 BUF_SAVE_MODIFF (b
) = 1;
378 BUF_INTERVALS (b
) = 0;
379 BUF_UNCHANGED_MODIFIED (b
) = 1;
380 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
381 BUF_END_UNCHANGED (b
) = 0;
382 BUF_BEG_UNCHANGED (b
) = 0;
383 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
385 b
->newline_cache
= 0;
386 b
->width_run_cache
= 0;
387 b
->width_table
= Qnil
;
388 b
->prevent_redisplay_optimizations_p
= 1;
390 /* Put this on the chain of all buffers including killed ones. */
391 b
->next
= all_buffers
;
394 /* An ordinary buffer normally doesn't need markers
395 to handle BEGV and ZV. */
397 b
->begv_marker
= Qnil
;
400 name
= Fcopy_sequence (name
);
401 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
404 if (SREF (name
, 0) != ' ')
410 reset_buffer_local_variables (b
, 1);
412 b
->mark
= Fmake_marker ();
413 BUF_MARKERS (b
) = NULL
;
416 /* Put this in the alist of all live buffers. */
418 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
420 /* An error in calling the function here (should someone redfine it)
421 can lead to infinite regress until you run out of stack. rms
422 says that's not worth protecting against. */
423 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
424 /* buf is on buffer-alist, so no gcpro. */
425 call1 (Qucs_set_table_for_input
, buf
);
431 /* Return a list of overlays which is a copy of the overlay list
432 LIST, but for buffer B. */
434 static struct Lisp_Overlay
*
435 copy_overlays (b
, list
)
437 struct Lisp_Overlay
*list
;
440 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
442 XSETBUFFER (buffer
, b
);
444 for (; list
; list
= list
->next
)
446 Lisp_Object overlay
, start
, end
, old_overlay
;
449 XSETMISC (old_overlay
, list
);
450 charpos
= marker_position (OVERLAY_START (old_overlay
));
451 start
= Fmake_marker ();
452 Fset_marker (start
, make_number (charpos
), buffer
);
453 XMARKER (start
)->insertion_type
454 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
456 charpos
= marker_position (OVERLAY_END (old_overlay
));
457 end
= Fmake_marker ();
458 Fset_marker (end
, make_number (charpos
), buffer
);
459 XMARKER (end
)->insertion_type
460 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
462 overlay
= allocate_misc ();
463 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
464 OVERLAY_START (overlay
) = start
;
465 OVERLAY_END (overlay
) = end
;
466 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
467 XOVERLAY (overlay
)->next
= NULL
;
470 tail
= tail
->next
= XOVERLAY (overlay
);
472 result
= tail
= XOVERLAY (overlay
);
479 /* Clone per-buffer values of buffer FROM.
481 Buffer TO gets the same per-buffer values as FROM, with the
482 following exceptions: (1) TO's name is left untouched, (2) markers
483 are copied and made to refer to TO, and (3) overlay lists are
487 clone_per_buffer_values (from
, to
)
488 struct buffer
*from
, *to
;
490 Lisp_Object to_buffer
;
493 XSETBUFFER (to_buffer
, to
);
495 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
497 offset
+= sizeof (Lisp_Object
))
501 obj
= PER_BUFFER_VALUE (from
, offset
);
504 struct Lisp_Marker
*m
= XMARKER (obj
);
505 obj
= Fmake_marker ();
506 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
507 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
510 PER_BUFFER_VALUE (to
, offset
) = obj
;
513 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
515 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
516 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
520 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
522 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
523 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
524 BASE-BUFFER should be an existing buffer (or buffer name).
525 NAME should be a string which is not the name of an existing buffer.
526 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
527 such as major and minor modes, in the indirect buffer.
528 CLONE nil means the indirect buffer's state is reset to default values. */)
529 (base_buffer
, name
, clone
)
530 Lisp_Object base_buffer
, name
, clone
;
535 buf
= Fget_buffer (name
);
537 error ("Buffer name `%s' is in use", SDATA (name
));
539 base_buffer
= Fget_buffer (base_buffer
);
540 if (NILP (base_buffer
))
541 error ("No such buffer: `%s'", SDATA (name
));
543 if (SCHARS (name
) == 0)
544 error ("Empty string for buffer name is not allowed");
546 b
= (struct buffer
*) allocate_buffer ();
547 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
549 if (XBUFFER (base_buffer
)->base_buffer
)
550 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
552 b
->base_buffer
= XBUFFER (base_buffer
);
554 /* Use the base buffer's text object. */
555 b
->text
= b
->base_buffer
->text
;
557 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
558 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
559 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
560 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
561 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
562 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
564 b
->newline_cache
= 0;
565 b
->width_run_cache
= 0;
566 b
->width_table
= Qnil
;
568 /* Put this on the chain of all buffers including killed ones. */
569 b
->next
= all_buffers
;
572 name
= Fcopy_sequence (name
);
573 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
577 reset_buffer_local_variables (b
, 1);
579 /* Put this in the alist of all live buffers. */
581 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
583 b
->mark
= Fmake_marker ();
586 /* The multibyte status belongs to the base buffer. */
587 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
589 /* Make sure the base buffer has markers for its narrowing. */
590 if (NILP (b
->base_buffer
->pt_marker
))
592 b
->base_buffer
->pt_marker
= Fmake_marker ();
593 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
594 BUF_PT (b
->base_buffer
),
595 BUF_PT_BYTE (b
->base_buffer
));
597 if (NILP (b
->base_buffer
->begv_marker
))
599 b
->base_buffer
->begv_marker
= Fmake_marker ();
600 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
601 BUF_BEGV (b
->base_buffer
),
602 BUF_BEGV_BYTE (b
->base_buffer
));
604 if (NILP (b
->base_buffer
->zv_marker
))
606 b
->base_buffer
->zv_marker
= Fmake_marker ();
607 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
608 BUF_ZV (b
->base_buffer
),
609 BUF_ZV_BYTE (b
->base_buffer
));
610 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
615 /* Give the indirect buffer markers for its narrowing. */
616 b
->pt_marker
= Fmake_marker ();
617 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
618 b
->begv_marker
= Fmake_marker ();
619 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
620 b
->zv_marker
= Fmake_marker ();
621 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
622 XMARKER (b
->zv_marker
)->insertion_type
= 1;
625 clone_per_buffer_values (b
->base_buffer
, b
);
631 delete_all_overlays (b
)
636 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
637 have to empty the list, otherwise we end up with overlays that
638 think they belong to this buffer while the buffer doesn't know about
640 while (b
->overlays_before
)
642 XSETMISC (overlay
, b
->overlays_before
);
643 Fdelete_overlay (overlay
);
645 while (b
->overlays_after
)
647 XSETMISC (overlay
, b
->overlays_after
);
648 Fdelete_overlay (overlay
);
650 eassert (b
->overlays_before
== NULL
);
651 eassert (b
->overlays_after
== NULL
);
654 /* Reinitialize everything about a buffer except its name and contents
656 If called on an already-initialized buffer, the list of overlays
657 should be deleted before calling this function, otherwise we end up
658 with overlays that claim to belong to the buffer but the buffer
659 claims it doesn't belong to it. */
663 register struct buffer
*b
;
666 b
->file_truename
= Qnil
;
667 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
669 XSETFASTINT (b
->save_length
, 0);
670 b
->last_window_start
= 1;
671 /* It is more conservative to start out "changed" than "unchanged". */
673 b
->prevent_redisplay_optimizations_p
= 1;
675 b
->auto_save_modified
= 0;
676 b
->auto_save_failure_time
= -1;
677 b
->auto_save_file_name
= Qnil
;
679 b
->overlays_before
= NULL
;
680 b
->overlays_after
= NULL
;
681 b
->overlay_center
= BEG
;
682 b
->mark_active
= Qnil
;
683 b
->point_before_scroll
= Qnil
;
684 b
->file_format
= Qnil
;
685 b
->last_selected_window
= Qnil
;
686 XSETINT (b
->display_count
, 0);
687 b
->display_time
= Qnil
;
688 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
689 b
->cursor_type
= buffer_defaults
.cursor_type
;
690 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
692 b
->display_error_modiff
= 0;
695 /* Reset buffer B's local variables info.
696 Don't use this on a buffer that has already been in use;
697 it does not treat permanent locals consistently.
698 Instead, use Fkill_all_local_variables.
700 If PERMANENT_TOO is 1, then we reset permanent built-in
701 buffer-local variables. If PERMANENT_TOO is 0,
702 we preserve those. */
705 reset_buffer_local_variables (b
, permanent_too
)
706 register struct buffer
*b
;
712 /* Reset the major mode to Fundamental, together with all the
713 things that depend on the major mode.
714 default-major-mode is handled at a higher level.
715 We ignore it here. */
716 b
->major_mode
= Qfundamental_mode
;
718 b
->mode_name
= QSFundamental
;
719 b
->minor_modes
= Qnil
;
721 /* If the standard case table has been altered and invalidated,
722 fix up its insides first. */
723 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
724 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
725 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
726 Fset_standard_case_table (Vascii_downcase_table
);
728 b
->downcase_table
= Vascii_downcase_table
;
729 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
730 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
731 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
732 b
->invisibility_spec
= Qt
;
734 b
->buffer_file_type
= Qnil
;
737 /* Reset all (or most) per-buffer variables to their defaults. */
738 b
->local_var_alist
= Qnil
;
739 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
740 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
741 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
743 /* For each slot that has a default value,
744 copy that into the slot. */
746 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
748 offset
+= sizeof (Lisp_Object
))
750 int idx
= PER_BUFFER_IDX (offset
);
753 || buffer_permanent_local_flags
[idx
] == 0))
754 /* Is -2 used anywhere? */
756 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
760 /* We split this away from generate-new-buffer, because rename-buffer
761 and set-visited-file-name ought to be able to use this to really
762 rename the buffer properly. */
764 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
766 doc
: /* Return a string that is the name of no existing buffer based on NAME.
767 If there is no live buffer named NAME, then return NAME.
768 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
769 until an unused name is found, and then return that name.
770 Optional second argument IGNORE specifies a name that is okay to use
771 \(if it is in the sequence to be tried)
772 even if a buffer with that name exists. */)
774 register Lisp_Object name
, ignore
;
776 register Lisp_Object gentemp
, tem
;
782 tem
= Fget_buffer (name
);
789 sprintf (number
, "<%d>", ++count
);
790 gentemp
= concat2 (name
, build_string (number
));
791 tem
= Fstring_equal (gentemp
, ignore
);
794 tem
= Fget_buffer (gentemp
);
801 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
802 doc
: /* Return the name of BUFFER, as a string.
803 With no argument or nil as argument, return the name of the current buffer. */)
805 register Lisp_Object buffer
;
808 return current_buffer
->name
;
809 CHECK_BUFFER (buffer
);
810 return XBUFFER (buffer
)->name
;
813 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
814 doc
: /* Return name of file BUFFER is visiting, or nil if none.
815 No argument or nil as argument means use the current buffer. */)
817 register Lisp_Object buffer
;
820 return current_buffer
->filename
;
821 CHECK_BUFFER (buffer
);
822 return XBUFFER (buffer
)->filename
;
825 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
827 doc
: /* Return the base buffer of indirect buffer BUFFER.
828 If BUFFER is not indirect, return nil. */)
830 register Lisp_Object buffer
;
833 Lisp_Object base_buffer
;
836 base
= current_buffer
->base_buffer
;
839 CHECK_BUFFER (buffer
);
840 base
= XBUFFER (buffer
)->base_buffer
;
845 XSETBUFFER (base_buffer
, base
);
849 DEFUN ("buffer-local-value", Fbuffer_local_value
,
850 Sbuffer_local_value
, 2, 2, 0,
851 doc
: /* Return the value of VARIABLE in BUFFER.
852 If VARIABLE does not have a buffer-local binding in BUFFER, the value
853 is the default binding of variable. */)
855 register Lisp_Object symbol
;
856 register Lisp_Object buffer
;
858 register struct buffer
*buf
;
859 register Lisp_Object result
;
861 CHECK_SYMBOL (symbol
);
862 CHECK_BUFFER (buffer
);
863 buf
= XBUFFER (buffer
);
865 /* Look in local_var_list */
866 result
= Fassoc (symbol
, buf
->local_var_alist
);
872 /* Look in special slots */
873 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
874 offset
< sizeof (struct buffer
);
875 /* sizeof EMACS_INT == sizeof Lisp_Object */
876 offset
+= (sizeof (EMACS_INT
)))
878 idx
= PER_BUFFER_IDX (offset
);
879 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
880 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
881 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
883 result
= PER_BUFFER_VALUE (buf
, offset
);
890 result
= Fdefault_value (symbol
);
894 Lisp_Object valcontents
;
895 Lisp_Object current_alist_element
;
897 /* What binding is loaded right now? */
898 valcontents
= SYMBOL_VALUE (symbol
);
899 current_alist_element
900 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
902 /* The value of the currently loaded binding is not
903 stored in it, but rather in the realvalue slot.
904 Store that value into the binding it belongs to
905 in case that is the one we are about to use. */
907 Fsetcdr (current_alist_element
,
908 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
910 /* Now get the (perhaps updated) value out of the binding. */
911 result
= XCDR (result
);
914 if (EQ (result
, Qunbound
))
915 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
920 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
921 Sbuffer_local_variables
, 0, 1, 0,
922 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
923 Most elements look like (SYMBOL . VALUE), describing one variable.
924 For a symbol that is locally unbound, just the symbol appears in the value.
925 Note that storing new VALUEs in these elements doesn't change the variables.
926 No argument or nil as argument means use current buffer as BUFFER. */)
928 register Lisp_Object buffer
;
930 register struct buffer
*buf
;
931 register Lisp_Object result
;
934 buf
= current_buffer
;
937 CHECK_BUFFER (buffer
);
938 buf
= XBUFFER (buffer
);
944 register Lisp_Object tail
;
945 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
947 Lisp_Object val
, elt
;
951 /* Reference each variable in the alist in buf.
952 If inquiring about the current buffer, this gets the current values,
953 so store them into the alist so the alist is up to date.
954 If inquiring about some other buffer, this swaps out any values
955 for that buffer, making the alist up to date automatically. */
956 val
= find_symbol_value (XCAR (elt
));
957 /* Use the current buffer value only if buf is the current buffer. */
958 if (buf
!= current_buffer
)
961 /* If symbol is unbound, put just the symbol in the list. */
962 if (EQ (val
, Qunbound
))
963 result
= Fcons (XCAR (elt
), result
);
964 /* Otherwise, put (symbol . value) in the list. */
966 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
970 /* Add on all the variables stored in special slots. */
974 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
975 offset
< sizeof (struct buffer
);
976 /* sizeof EMACS_INT == sizeof Lisp_Object */
977 offset
+= (sizeof (EMACS_INT
)))
979 idx
= PER_BUFFER_IDX (offset
);
980 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
981 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
982 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
983 PER_BUFFER_VALUE (buf
, offset
)),
992 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
994 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
995 No argument or nil as argument means use current buffer as BUFFER. */)
997 register Lisp_Object buffer
;
999 register struct buffer
*buf
;
1001 buf
= current_buffer
;
1004 CHECK_BUFFER (buffer
);
1005 buf
= XBUFFER (buffer
);
1008 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1011 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1013 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1014 A non-nil FLAG means mark the buffer modified. */)
1016 register Lisp_Object flag
;
1018 register int already
;
1019 register Lisp_Object fn
;
1020 Lisp_Object buffer
, window
;
1022 #ifdef CLASH_DETECTION
1023 /* If buffer becoming modified, lock the file.
1024 If buffer becoming unmodified, unlock the file. */
1026 fn
= current_buffer
->file_truename
;
1027 /* Test buffer-file-name so that binding it to nil is effective. */
1028 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1030 already
= SAVE_MODIFF
< MODIFF
;
1031 if (!already
&& !NILP (flag
))
1033 else if (already
&& NILP (flag
))
1036 #endif /* CLASH_DETECTION */
1038 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1040 /* Set update_mode_lines only if buffer is displayed in some window.
1041 Packages like jit-lock or lazy-lock preserve a buffer's modified
1042 state by recording/restoring the state around blocks of code.
1043 Setting update_mode_lines makes redisplay consider all windows
1044 (on all frames). Stealth fontification of buffers not displayed
1045 would incur additional redisplay costs if we'd set
1046 update_modes_lines unconditionally.
1048 Ideally, I think there should be another mechanism for fontifying
1049 buffers without "modifying" buffers, or redisplay should be
1050 smarter about updating the `*' in mode lines. --gerd */
1051 XSETBUFFER (buffer
, current_buffer
);
1052 window
= Fget_buffer_window (buffer
, Qt
);
1053 if (WINDOWP (window
))
1055 ++update_mode_lines
;
1056 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1062 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1063 Srestore_buffer_modified_p
, 1, 1, 0,
1064 doc
: /* Like `set-buffer-modified-p', with a differences concerning redisplay.
1065 It is not ensured that mode lines will be updated to show the modified
1066 state of the current buffer. Use with care. */)
1070 #ifdef CLASH_DETECTION
1073 /* If buffer becoming modified, lock the file.
1074 If buffer becoming unmodified, unlock the file. */
1076 fn
= current_buffer
->file_truename
;
1077 /* Test buffer-file-name so that binding it to nil is effective. */
1078 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1080 int already
= SAVE_MODIFF
< MODIFF
;
1081 if (!already
&& !NILP (flag
))
1083 else if (already
&& NILP (flag
))
1086 #endif /* CLASH_DETECTION */
1088 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1092 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1094 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1095 Each buffer has a tick counter which is incremented each time the text in
1096 that buffer is changed. It wraps around occasionally.
1097 No argument or nil as argument means use current buffer as BUFFER. */)
1099 register Lisp_Object buffer
;
1101 register struct buffer
*buf
;
1103 buf
= current_buffer
;
1106 CHECK_BUFFER (buffer
);
1107 buf
= XBUFFER (buffer
);
1110 return make_number (BUF_MODIFF (buf
));
1113 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1114 "sRename buffer (to new name): \nP",
1115 doc
: /* Change current buffer's name to NEWNAME (a string).
1116 If second arg UNIQUE is nil or omitted, it is an error if a
1117 buffer named NEWNAME already exists.
1118 If UNIQUE is non-nil, come up with a new name using
1119 `generate-new-buffer-name'.
1120 Interactively, you can set UNIQUE with a prefix argument.
1121 We return the name we actually gave the buffer.
1122 This does not change the name of the visited file (if any). */)
1124 register Lisp_Object newname
, unique
;
1126 register Lisp_Object tem
, buf
;
1128 CHECK_STRING (newname
);
1130 if (SCHARS (newname
) == 0)
1131 error ("Empty string is invalid as a buffer name");
1133 tem
= Fget_buffer (newname
);
1136 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1137 rename the buffer automatically so you can create another
1138 with the original name. It makes UNIQUE equivalent to
1139 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1140 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1141 return current_buffer
->name
;
1143 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1145 error ("Buffer name `%s' is in use", SDATA (newname
));
1148 current_buffer
->name
= newname
;
1150 /* Catch redisplay's attention. Unless we do this, the mode lines for
1151 any windows displaying current_buffer will stay unchanged. */
1152 update_mode_lines
++;
1154 XSETBUFFER (buf
, current_buffer
);
1155 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1156 if (NILP (current_buffer
->filename
)
1157 && !NILP (current_buffer
->auto_save_file_name
))
1158 call0 (intern ("rename-auto-save-file"));
1159 /* Refetch since that last call may have done GC. */
1160 return current_buffer
->name
;
1163 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1164 doc
: /* Return most recently selected buffer other than BUFFER.
1165 Buffers not visible in windows are preferred to visible buffers,
1166 unless optional second argument VISIBLE-OK is non-nil.
1167 If the optional third argument FRAME is non-nil, use that frame's
1168 buffer list instead of the selected frame's buffer list.
1169 If no other buffer exists, the buffer `*scratch*' is returned.
1170 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1171 (buffer
, visible_ok
, frame
)
1172 register Lisp_Object buffer
, visible_ok
, frame
;
1174 Lisp_Object
Fset_buffer_major_mode ();
1175 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1179 frame
= selected_frame
;
1181 tail
= Vbuffer_alist
;
1182 pred
= frame_buffer_predicate (frame
);
1184 /* Consider buffers that have been seen in the selected frame
1185 before other buffers. */
1187 tem
= frame_buffer_list (frame
);
1191 if (BUFFERP (XCAR (tem
)))
1192 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1195 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1197 for (; CONSP (tail
); tail
= XCDR (tail
))
1199 buf
= Fcdr (XCAR (tail
));
1200 if (EQ (buf
, buffer
))
1204 if (NILP (XBUFFER (buf
)->name
))
1206 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1208 /* If the selected frame has a buffer_predicate,
1209 disregard buffers that don't fit the predicate. */
1212 tem
= call1 (pred
, buf
);
1217 if (NILP (visible_ok
))
1218 tem
= Fget_buffer_window (buf
, Qvisible
);
1223 if (NILP (notsogood
))
1226 if (!NILP (notsogood
))
1228 buf
= Fget_buffer (build_string ("*scratch*"));
1231 buf
= Fget_buffer_create (build_string ("*scratch*"));
1232 Fset_buffer_major_mode (buf
);
1237 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1239 doc
: /* Make BUFFER stop keeping undo information.
1240 No argument or nil as argument means do this for the current buffer. */)
1242 register Lisp_Object buffer
;
1244 Lisp_Object real_buffer
;
1247 XSETBUFFER (real_buffer
, current_buffer
);
1250 real_buffer
= Fget_buffer (buffer
);
1251 if (NILP (real_buffer
))
1255 XBUFFER (real_buffer
)->undo_list
= Qt
;
1260 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1262 doc
: /* Start keeping undo information for buffer BUFFER.
1263 No argument or nil as argument means do this for the current buffer. */)
1265 register Lisp_Object buffer
;
1267 Lisp_Object real_buffer
;
1270 XSETBUFFER (real_buffer
, current_buffer
);
1273 real_buffer
= Fget_buffer (buffer
);
1274 if (NILP (real_buffer
))
1278 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1279 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1285 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1286 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1287 The buffer being killed will be current while the hook is running.\n\
1290 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1291 doc
: /* Kill the buffer BUFFER.
1292 The argument may be a buffer or may be the name of a buffer.
1293 An argument of nil means kill the current buffer.
1295 Value is t if the buffer is actually killed, nil if user says no.
1297 The value of `kill-buffer-hook' (which may be local to that buffer),
1298 if not void, is a list of functions to be called, with no arguments,
1299 before the buffer is actually killed. The buffer to be killed is current
1300 when the hook functions are called.
1302 Any processes that have this buffer as the `process-buffer' are killed
1308 register struct buffer
*b
;
1309 register Lisp_Object tem
;
1310 register struct Lisp_Marker
*m
;
1311 struct gcpro gcpro1
;
1314 buf
= Fcurrent_buffer ();
1316 buf
= Fget_buffer (buffer
);
1322 /* Avoid trouble for buffer already dead. */
1326 /* Query if the buffer is still modified. */
1327 if (INTERACTIVE
&& !NILP (b
->filename
)
1328 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1331 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1332 b
->name
, make_number (0)));
1338 /* Run hooks with the buffer to be killed the current buffer. */
1340 int count
= SPECPDL_INDEX ();
1341 Lisp_Object arglist
[1];
1343 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1344 set_buffer_internal (b
);
1346 /* First run the query functions; if any query is answered no,
1347 don't kill the buffer. */
1348 arglist
[0] = Qkill_buffer_query_functions
;
1349 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1350 return unbind_to (count
, Qnil
);
1352 /* Then run the hooks. */
1353 Frun_hooks (1, &Qkill_buffer_hook
);
1354 unbind_to (count
, Qnil
);
1357 /* We have no more questions to ask. Verify that it is valid
1358 to kill the buffer. This must be done after the questions
1359 since anything can happen within do_yes_or_no_p. */
1361 /* Don't kill the minibuffer now current. */
1362 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1368 /* When we kill a base buffer, kill all its indirect buffers.
1369 We do it at this stage so nothing terrible happens if they
1370 ask questions or their hooks get errors. */
1371 if (! b
->base_buffer
)
1373 struct buffer
*other
;
1377 for (other
= all_buffers
; other
; other
= other
->next
)
1378 /* all_buffers contains dead buffers too;
1379 don't re-kill them. */
1380 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1383 XSETBUFFER (buf
, other
);
1390 /* Make this buffer not be current.
1391 In the process, notice if this is the sole visible buffer
1392 and give up if so. */
1393 if (b
== current_buffer
)
1395 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1397 if (b
== current_buffer
)
1401 /* Notice if the buffer to kill is the sole visible buffer
1402 when we're currently in the mini-buffer, and give up if so. */
1403 XSETBUFFER (tem
, current_buffer
);
1404 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1406 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1411 /* Now there is no question: we can kill the buffer. */
1413 #ifdef CLASH_DETECTION
1414 /* Unlock this buffer's file, if it is locked. */
1416 #endif /* CLASH_DETECTION */
1418 kill_buffer_processes (buf
);
1419 clear_charpos_cache (b
);
1421 tem
= Vinhibit_quit
;
1423 replace_buffer_in_all_windows (buf
);
1424 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1425 frames_discard_buffer (buf
);
1426 Vinhibit_quit
= tem
;
1428 /* Delete any auto-save file, if we saved it in this session.
1429 But not if the buffer is modified. */
1430 if (STRINGP (b
->auto_save_file_name
)
1431 && b
->auto_save_modified
!= 0
1432 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1433 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1434 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1437 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1439 internal_delete_file (b
->auto_save_file_name
);
1444 /* Unchain all markers that belong to this indirect buffer.
1445 Don't unchain the markers that belong to the base buffer
1446 or its other indirect buffers. */
1447 for (m
= BUF_MARKERS (b
); m
; )
1449 struct Lisp_Marker
*next
= m
->next
;
1457 /* Unchain all markers of this buffer and its indirect buffers.
1458 and leave them pointing nowhere. */
1459 for (m
= BUF_MARKERS (b
); m
; )
1461 struct Lisp_Marker
*next
= m
->next
;
1466 BUF_MARKERS (b
) = NULL
;
1467 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1469 /* Perhaps we should explicitly free the interval tree here... */
1472 /* Reset the local variables, so that this buffer's local values
1473 won't be protected from GC. They would be protected
1474 if they happened to remain encached in their symbols.
1475 This gets rid of them for certain. */
1476 swap_out_buffer_local_variables (b
);
1477 reset_buffer_local_variables (b
, 1);
1482 if (! b
->base_buffer
)
1483 free_buffer_text (b
);
1485 if (b
->newline_cache
)
1487 free_region_cache (b
->newline_cache
);
1488 b
->newline_cache
= 0;
1490 if (b
->width_run_cache
)
1492 free_region_cache (b
->width_run_cache
);
1493 b
->width_run_cache
= 0;
1495 b
->width_table
= Qnil
;
1497 b
->undo_list
= Qnil
;
1502 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1503 we do this each time BUF is selected visibly, the more recently
1504 selected buffers are always closer to the front of the list. This
1505 means that other_buffer is more likely to choose a relevant buffer. */
1511 register Lisp_Object link
, prev
;
1513 frame
= selected_frame
;
1516 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1518 if (EQ (XCDR (XCAR (link
)), buf
))
1523 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1524 we cannot use Fdelq itself here because it allows quitting. */
1527 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1529 XSETCDR (prev
, XCDR (XCDR (prev
)));
1531 XSETCDR (link
, Vbuffer_alist
);
1532 Vbuffer_alist
= link
;
1534 /* Now move this buffer to the front of frame_buffer_list also. */
1537 for (link
= frame_buffer_list (frame
); CONSP (link
);
1540 if (EQ (XCAR (link
), buf
))
1545 /* Effectively do delq. */
1550 set_frame_buffer_list (frame
,
1551 XCDR (frame_buffer_list (frame
)));
1553 XSETCDR (prev
, XCDR (XCDR (prev
)));
1555 XSETCDR (link
, frame_buffer_list (frame
));
1556 set_frame_buffer_list (frame
, link
);
1559 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1562 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1563 doc
: /* Set an appropriate major mode for BUFFER.
1564 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1565 according to `default-major-mode'.
1566 Use this function before selecting the buffer, since it may need to inspect
1567 the current buffer's major mode. */)
1572 Lisp_Object function
;
1574 if (STRINGP (XBUFFER (buffer
)->name
)
1575 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1576 function
= find_symbol_value (intern ("initial-major-mode"));
1579 function
= buffer_defaults
.major_mode
;
1581 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1582 function
= current_buffer
->major_mode
;
1585 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1588 count
= SPECPDL_INDEX ();
1590 /* To select a nonfundamental mode,
1591 select the buffer temporarily and then call the mode function. */
1593 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1595 Fset_buffer (buffer
);
1598 return unbind_to (count
, Qnil
);
1601 /* If switching buffers in WINDOW would be an error, return
1602 a C string saying what the error would be. */
1605 no_switch_window (window
)
1609 if (EQ (minibuf_window
, window
))
1610 return "Cannot switch buffers in minibuffer window";
1611 tem
= Fwindow_dedicated_p (window
);
1613 return "Cannot switch buffers in a dedicated window";
1617 /* Switch to buffer BUFFER in the selected window.
1618 If NORECORD is non-nil, don't call record_buffer. */
1621 switch_to_buffer_1 (buffer
, norecord
)
1622 Lisp_Object buffer
, norecord
;
1624 register Lisp_Object buf
;
1627 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1630 buf
= Fget_buffer (buffer
);
1633 buf
= Fget_buffer_create (buffer
);
1634 Fset_buffer_major_mode (buf
);
1638 if (NILP (norecord
))
1639 record_buffer (buf
);
1641 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1642 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1649 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1650 doc
: /* Select buffer BUFFER in the current window.
1651 BUFFER may be a buffer or a buffer name.
1652 Optional second arg NORECORD non-nil means
1653 do not put this buffer at the front of the list of recently selected ones.
1655 WARNING: This is NOT the way to work on another buffer temporarily
1656 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1657 the window-buffer correspondences. */)
1659 Lisp_Object buffer
, norecord
;
1663 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1664 /* Basically a NOP. Avoid signalling an error if the selected window
1665 is dedicated, or a minibuffer, ... */
1666 return Fset_buffer (buffer
);
1668 err
= no_switch_window (selected_window
);
1669 if (err
) error (err
);
1671 return switch_to_buffer_1 (buffer
, norecord
);
1674 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1675 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1676 If BUFFER is nil, then some other buffer is chosen.
1677 If `pop-up-windows' is non-nil, windows can be split to do this.
1678 If optional second arg OTHER-WINDOW is nil, insist on finding another
1679 window even if BUFFER is already visible in the selected window,
1680 and ignore `same-window-regexps' and `same-window-buffer-names'.
1681 This uses the function `display-buffer' as a subroutine; see the documentation
1682 of `display-buffer' for additional customization information.
1684 Optional third arg NORECORD non-nil means
1685 do not put this buffer at the front of the list of recently selected ones. */)
1686 (buffer
, other_window
, norecord
)
1687 Lisp_Object buffer
, other_window
, norecord
;
1689 register Lisp_Object buf
;
1691 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1694 buf
= Fget_buffer (buffer
);
1697 buf
= Fget_buffer_create (buffer
);
1698 Fset_buffer_major_mode (buf
);
1702 if (NILP (norecord
))
1703 /* Why bother ? Fselect_window will do it for us anyway. -stef */
1704 record_buffer (buf
);
1705 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1709 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1710 doc
: /* Return the current buffer as a Lisp object. */)
1713 register Lisp_Object buf
;
1714 XSETBUFFER (buf
, current_buffer
);
1718 /* Set the current buffer to B.
1720 We previously set windows_or_buffers_changed here to invalidate
1721 global unchanged information in beg_unchanged and end_unchanged.
1722 This is no longer necessary because we now compute unchanged
1723 information on a buffer-basis. Every action affecting other
1724 windows than the selected one requires a select_window at some
1725 time, and that increments windows_or_buffers_changed. */
1728 set_buffer_internal (b
)
1729 register struct buffer
*b
;
1731 if (current_buffer
!= b
)
1732 set_buffer_internal_1 (b
);
1735 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1736 This is used by redisplay. */
1739 set_buffer_internal_1 (b
)
1740 register struct buffer
*b
;
1742 register struct buffer
*old_buf
;
1743 register Lisp_Object tail
, valcontents
;
1746 #ifdef USE_MMAP_FOR_BUFFERS
1747 if (b
->text
->beg
== NULL
)
1748 enlarge_buffer_text (b
, 0);
1749 #endif /* USE_MMAP_FOR_BUFFERS */
1751 if (current_buffer
== b
)
1754 old_buf
= current_buffer
;
1756 last_known_column_point
= -1; /* invalidate indentation cache */
1760 /* Put the undo list back in the base buffer, so that it appears
1761 that an indirect buffer shares the undo list of its base. */
1762 if (old_buf
->base_buffer
)
1763 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1765 /* If the old current buffer has markers to record PT, BEGV and ZV
1766 when it is not current, update them now. */
1767 if (! NILP (old_buf
->pt_marker
))
1770 XSETBUFFER (obuf
, old_buf
);
1771 set_marker_both (old_buf
->pt_marker
, obuf
,
1772 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1774 if (! NILP (old_buf
->begv_marker
))
1777 XSETBUFFER (obuf
, old_buf
);
1778 set_marker_both (old_buf
->begv_marker
, obuf
,
1779 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1781 if (! NILP (old_buf
->zv_marker
))
1784 XSETBUFFER (obuf
, old_buf
);
1785 set_marker_both (old_buf
->zv_marker
, obuf
,
1786 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1790 /* Get the undo list from the base buffer, so that it appears
1791 that an indirect buffer shares the undo list of its base. */
1793 b
->undo_list
= b
->base_buffer
->undo_list
;
1795 /* If the new current buffer has markers to record PT, BEGV and ZV
1796 when it is not current, fetch them now. */
1797 if (! NILP (b
->pt_marker
))
1799 BUF_PT (b
) = marker_position (b
->pt_marker
);
1800 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1802 if (! NILP (b
->begv_marker
))
1804 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1805 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1807 if (! NILP (b
->zv_marker
))
1809 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1810 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1813 /* Look down buffer's list of local Lisp variables
1814 to find and update any that forward into C variables. */
1816 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1818 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1819 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1820 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1821 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1822 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1823 /* Just reference the variable
1824 to cause it to become set for this buffer. */
1825 Fsymbol_value (XCAR (XCAR (tail
)));
1828 /* Do the same with any others that were local to the previous buffer */
1831 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1833 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1834 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1835 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1836 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1837 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1838 /* Just reference the variable
1839 to cause it to become set for this buffer. */
1840 Fsymbol_value (XCAR (XCAR (tail
)));
1844 /* Switch to buffer B temporarily for redisplay purposes.
1845 This avoids certain things that don't need to be done within redisplay. */
1851 register struct buffer
*old_buf
;
1853 if (current_buffer
== b
)
1856 old_buf
= current_buffer
;
1861 /* If the old current buffer has markers to record PT, BEGV and ZV
1862 when it is not current, update them now. */
1863 if (! NILP (old_buf
->pt_marker
))
1866 XSETBUFFER (obuf
, old_buf
);
1867 set_marker_both (old_buf
->pt_marker
, obuf
,
1868 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1870 if (! NILP (old_buf
->begv_marker
))
1873 XSETBUFFER (obuf
, old_buf
);
1874 set_marker_both (old_buf
->begv_marker
, obuf
,
1875 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1877 if (! NILP (old_buf
->zv_marker
))
1880 XSETBUFFER (obuf
, old_buf
);
1881 set_marker_both (old_buf
->zv_marker
, obuf
,
1882 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1886 /* If the new current buffer has markers to record PT, BEGV and ZV
1887 when it is not current, fetch them now. */
1888 if (! NILP (b
->pt_marker
))
1890 BUF_PT (b
) = marker_position (b
->pt_marker
);
1891 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1893 if (! NILP (b
->begv_marker
))
1895 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1896 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1898 if (! NILP (b
->zv_marker
))
1900 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1901 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1905 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1906 doc
: /* Make the buffer BUFFER current for editing operations.
1907 BUFFER may be a buffer or the name of an existing buffer.
1908 See also `save-excursion' when you want to make a buffer current temporarily.
1909 This function does not display the buffer, so its effect ends
1910 when the current command terminates.
1911 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1913 register Lisp_Object buffer
;
1915 register Lisp_Object buf
;
1916 buf
= Fget_buffer (buffer
);
1919 if (NILP (XBUFFER (buf
)->name
))
1920 error ("Selecting deleted buffer");
1921 set_buffer_internal (XBUFFER (buf
));
1925 /* Set the current buffer to BUFFER provided it is alive. */
1928 set_buffer_if_live (buffer
)
1931 if (! NILP (XBUFFER (buffer
)->name
))
1932 Fset_buffer (buffer
);
1936 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1937 Sbarf_if_buffer_read_only
, 0, 0, 0,
1938 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1941 if (!NILP (current_buffer
->read_only
)
1942 && NILP (Vinhibit_read_only
))
1943 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1947 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1948 doc
: /* Put BUFFER at the end of the list of all buffers.
1949 There it is the least likely candidate for `other-buffer' to return;
1950 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1951 If BUFFER is nil or omitted, bury the current buffer.
1952 Also, if BUFFER is nil or omitted, remove the current buffer from the
1953 selected window if it is displayed there. */)
1955 register Lisp_Object buffer
;
1957 /* Figure out what buffer we're going to bury. */
1961 XSETBUFFER (buffer
, current_buffer
);
1963 tem
= Fwindow_buffer (selected_window
);
1964 /* If we're burying the current buffer, unshow it. */
1965 if (EQ (buffer
, tem
))
1967 if (NILP (Fwindow_dedicated_p (selected_window
)))
1968 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1969 else if (NILP (XWINDOW (selected_window
)->parent
))
1970 Ficonify_frame (Fwindow_frame (selected_window
));
1972 Fdelete_window (selected_window
);
1979 buf1
= Fget_buffer (buffer
);
1985 /* Move buffer to the end of the buffer list. Do nothing if the
1986 buffer is killed. */
1987 if (!NILP (XBUFFER (buffer
)->name
))
1989 Lisp_Object aelt
, link
;
1991 aelt
= Frassq (buffer
, Vbuffer_alist
);
1992 link
= Fmemq (aelt
, Vbuffer_alist
);
1993 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1994 XSETCDR (link
, Qnil
);
1995 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1997 /* Removing BUFFER from frame-specific lists
1998 has the effect of putting BUFFER at the end
1999 of the combined list in each frame. */
2000 frames_discard_buffer (buffer
);
2006 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2007 doc
: /* Delete the entire contents of the current buffer.
2008 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2009 so the buffer is truly empty after this. */)
2016 current_buffer
->last_window_start
= 1;
2017 /* Prevent warnings, or suspension of auto saving, that would happen
2018 if future size is less than past size. Use of erase-buffer
2019 implies that the future text is not really related to the past text. */
2020 XSETFASTINT (current_buffer
->save_length
, 0);
2025 validate_region (b
, e
)
2026 register Lisp_Object
*b
, *e
;
2028 CHECK_NUMBER_COERCE_MARKER (*b
);
2029 CHECK_NUMBER_COERCE_MARKER (*e
);
2031 if (XINT (*b
) > XINT (*e
))
2034 tem
= *b
; *b
= *e
; *e
= tem
;
2037 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2038 && XINT (*e
) <= ZV
))
2039 args_out_of_range (*b
, *e
);
2042 /* Advance BYTE_POS up to a character boundary
2043 and return the adjusted position. */
2046 advance_to_char_boundary (byte_pos
)
2051 if (byte_pos
== BEG
)
2052 /* Beginning of buffer is always a character boundary. */
2055 c
= FETCH_BYTE (byte_pos
);
2056 if (! CHAR_HEAD_P (c
))
2058 /* We should advance BYTE_POS only when C is a constituent of a
2059 multibyte sequence. */
2060 int orig_byte_pos
= byte_pos
;
2065 c
= FETCH_BYTE (byte_pos
);
2067 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2069 if (byte_pos
< orig_byte_pos
)
2070 byte_pos
= orig_byte_pos
;
2071 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2072 surely advance to the correct character boundary. If C is
2073 not, BYTE_POS was unchanged. */
2079 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2081 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2082 If FLAG is t, this makes the buffer a multibyte buffer.
2083 If FLAG is nil, this makes the buffer a single-byte buffer.
2084 The buffer contents remain unchanged as a sequence of bytes
2085 but the contents viewed as characters do change.
2086 If the multibyte flag was really changed, undo information of the
2087 current buffer is cleared. */)
2091 struct Lisp_Marker
*tail
, *markers
;
2092 struct buffer
*other
;
2093 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2095 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2096 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2098 if (current_buffer
->base_buffer
)
2099 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2101 /* Do nothing if nothing actually changes. */
2102 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2105 /* It would be better to update the list,
2106 but this is good enough for now. */
2108 current_buffer
->undo_list
= Qt
;
2110 /* If the cached position is for this buffer, clear it out. */
2111 clear_charpos_cache (current_buffer
);
2114 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2116 begv
= BEGV
, zv
= ZV
;
2126 /* Do this first, so it can use CHAR_TO_BYTE
2127 to calculate the old correspondences. */
2128 set_intervals_multibyte (0);
2130 current_buffer
->enable_multibyte_characters
= Qnil
;
2136 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2139 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2140 tail
->charpos
= tail
->bytepos
;
2142 /* Convert multibyte form of 8-bit characters to unibyte. */
2157 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2158 p
+= bytes
, pos
+= bytes
;
2161 c
= STRING_CHAR (p
, stop
- pos
);
2162 /* Delete all bytes for this 8-bit character but the
2163 last one, and change the last one to the charcter
2166 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2178 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2186 /* Be sure not to have a multibyte sequence striding over the GAP.
2187 Ex: We change this: "...abc\201 _GAP_ \241def..."
2188 to: "...abc _GAP_ \201\241def..." */
2190 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2191 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2193 unsigned char *p
= GPT_ADDR
- 1;
2195 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2196 if (BASE_LEADING_CODE_P (*p
))
2198 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2200 move_gap_both (new_gpt
, new_gpt
);
2204 /* Make the buffer contents valid as multibyte by converting
2205 8-bit characters to multibyte form. */
2221 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2222 p
+= bytes
, pos
+= bytes
;
2225 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2227 bytes
= CHAR_STRING (*p
, tmp
);
2229 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2231 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2232 /* Now the gap is after the just inserted data. */
2249 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2251 /* Do this first, so that chars_in_text asks the right question.
2252 set_intervals_multibyte needs it too. */
2253 current_buffer
->enable_multibyte_characters
= Qt
;
2255 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2256 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2258 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2260 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2261 if (BEGV_BYTE
> GPT_BYTE
)
2262 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2264 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2266 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2267 if (ZV_BYTE
> GPT_BYTE
)
2268 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2270 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2273 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2276 if (pt_byte
> GPT_BYTE
)
2277 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2279 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2280 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2283 tail
= markers
= BUF_MARKERS (current_buffer
);
2285 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2286 getting confused by the markers that have not yet been updated.
2287 It is also a signal that it should never create a marker. */
2288 BUF_MARKERS (current_buffer
) = NULL
;
2290 for (; tail
; tail
= tail
->next
)
2292 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2293 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2296 /* Make sure no markers were put on the chain
2297 while the chain value was incorrect. */
2298 if (BUF_MARKERS (current_buffer
))
2301 BUF_MARKERS (current_buffer
) = markers
;
2303 /* Do this last, so it can calculate the new correspondences
2304 between chars and bytes. */
2305 set_intervals_multibyte (1);
2309 current_buffer
->undo_list
= Qnil
;
2311 /* Changing the multibyteness of a buffer means that all windows
2312 showing that buffer must be updated thoroughly. */
2313 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2314 ++windows_or_buffers_changed
;
2316 /* Copy this buffer's new multibyte status
2317 into all of its indirect buffers. */
2318 for (other
= all_buffers
; other
; other
= other
->next
)
2319 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2321 other
->enable_multibyte_characters
2322 = current_buffer
->enable_multibyte_characters
;
2323 other
->prevent_redisplay_optimizations_p
= 1;
2326 /* Restore the modifiedness of the buffer. */
2327 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2328 Fset_buffer_modified_p (Qnil
);
2331 /* Update coding systems of this buffer's process (if any). */
2333 Lisp_Object process
;
2335 process
= Fget_buffer_process (Fcurrent_buffer ());
2336 if (PROCESSP (process
))
2337 setup_process_coding_systems (process
);
2339 #endif /* subprocesses */
2344 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2346 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2347 Most local variable bindings are eliminated so that the default values
2348 become effective once more. Also, the syntax table is set from
2349 `standard-syntax-table', the local keymap is set to nil,
2350 and the abbrev table from `fundamental-mode-abbrev-table'.
2351 This function also forces redisplay of the mode line.
2353 Every function to select a new major mode starts by
2354 calling this function.
2356 As a special exception, local variables whose names have
2357 a non-nil `permanent-local' property are not eliminated by this function.
2359 The first thing this function does is run
2360 the normal hook `change-major-mode-hook'. */)
2363 register Lisp_Object alist
, sym
, tem
;
2366 if (!NILP (Vrun_hooks
))
2367 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2368 oalist
= current_buffer
->local_var_alist
;
2370 /* Make sure none of the bindings in oalist
2371 remain swapped in, in their symbols. */
2373 swap_out_buffer_local_variables (current_buffer
);
2375 /* Actually eliminate all local bindings of this buffer. */
2377 reset_buffer_local_variables (current_buffer
, 0);
2379 /* Any which are supposed to be permanent,
2380 make local again, with the same values they had. */
2382 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2384 sym
= XCAR (XCAR (alist
));
2385 tem
= Fget (sym
, Qpermanent_local
);
2388 Fmake_local_variable (sym
);
2389 Fset (sym
, XCDR (XCAR (alist
)));
2393 /* Force mode-line redisplay. Useful here because all major mode
2394 commands call this function. */
2395 update_mode_lines
++;
2400 /* Make sure no local variables remain set up with buffer B
2401 for their current values. */
2404 swap_out_buffer_local_variables (b
)
2407 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2409 XSETBUFFER (buffer
, b
);
2410 oalist
= b
->local_var_alist
;
2412 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2414 sym
= XCAR (XCAR (alist
));
2416 /* Need not do anything if some other buffer's binding is now encached. */
2417 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2418 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2420 /* Symbol is set up for this buffer's old local value.
2421 Set it up for the current buffer with the default value. */
2423 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2424 /* Store the symbol's current value into the alist entry
2425 it is currently set up for. This is so that, if the
2426 local is marked permanent, and we make it local again
2427 later in Fkill_all_local_variables, we don't lose the value. */
2428 XSETCDR (XCAR (tem
),
2429 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2430 /* Switch to the symbol's default-value alist entry. */
2432 /* Mark it as current for buffer B. */
2433 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2434 /* Store the current value into any forwarding in the symbol. */
2435 store_symval_forwarding (sym
,
2436 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2442 /* Find all the overlays in the current buffer that contain position POS.
2443 Return the number found, and store them in a vector in *VEC_PTR.
2444 Store in *LEN_PTR the size allocated for the vector.
2445 Store in *NEXT_PTR the next position after POS where an overlay starts,
2446 or ZV if there are no more overlays.
2447 Store in *PREV_PTR the previous position before POS where an overlay ends,
2448 or where an overlay starts which ends at or after POS;
2449 or BEGV if there are no such overlays.
2450 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2452 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2453 when this function is called.
2455 If EXTEND is non-zero, we make the vector bigger if necessary.
2456 If EXTEND is zero, we never extend the vector,
2457 and we store only as many overlays as will fit.
2458 But we still return the total number of overlays.
2460 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2461 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2462 default (BEGV or ZV). */
2465 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2468 Lisp_Object
**vec_ptr
;
2474 Lisp_Object overlay
, start
, end
;
2475 struct Lisp_Overlay
*tail
;
2478 Lisp_Object
*vec
= *vec_ptr
;
2481 int inhibit_storing
= 0;
2483 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2485 int startpos
, endpos
;
2487 XSETMISC (overlay
, tail
);
2489 start
= OVERLAY_START (overlay
);
2490 end
= OVERLAY_END (overlay
);
2491 endpos
= OVERLAY_POSITION (end
);
2498 startpos
= OVERLAY_POSITION (start
);
2499 /* This one ends at or after POS
2500 so its start counts for PREV_PTR if it's before POS. */
2501 if (prev
< startpos
&& startpos
< pos
)
2505 if (startpos
<= pos
)
2509 /* The supplied vector is full.
2510 Either make it bigger, or don't store any more in it. */
2513 /* Make it work with an initial len == 0. */
2518 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2522 inhibit_storing
= 1;
2525 if (!inhibit_storing
)
2527 /* Keep counting overlays even if we can't return them all. */
2530 else if (startpos
< next
)
2534 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2536 int startpos
, endpos
;
2538 XSETMISC (overlay
, tail
);
2540 start
= OVERLAY_START (overlay
);
2541 end
= OVERLAY_END (overlay
);
2542 startpos
= OVERLAY_POSITION (start
);
2545 if (startpos
< next
)
2549 endpos
= OVERLAY_POSITION (end
);
2556 /* Make it work with an initial len == 0. */
2561 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2565 inhibit_storing
= 1;
2568 if (!inhibit_storing
)
2572 if (startpos
< pos
&& startpos
> prev
)
2575 else if (endpos
< pos
&& endpos
> prev
)
2577 else if (endpos
== pos
&& startpos
> prev
2578 && (!change_req
|| startpos
< pos
))
2589 /* Find all the overlays in the current buffer that overlap the range BEG-END
2590 or are empty at BEG.
2592 Return the number found, and store them in a vector in *VEC_PTR.
2593 Store in *LEN_PTR the size allocated for the vector.
2594 Store in *NEXT_PTR the next position after POS where an overlay starts,
2595 or ZV if there are no more overlays.
2596 Store in *PREV_PTR the previous position before POS where an overlay ends,
2597 or BEGV if there are no previous overlays.
2598 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2600 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2601 when this function is called.
2603 If EXTEND is non-zero, we make the vector bigger if necessary.
2604 If EXTEND is zero, we never extend the vector,
2605 and we store only as many overlays as will fit.
2606 But we still return the total number of overlays. */
2609 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2612 Lisp_Object
**vec_ptr
;
2617 Lisp_Object overlay
, ostart
, oend
;
2618 struct Lisp_Overlay
*tail
;
2621 Lisp_Object
*vec
= *vec_ptr
;
2624 int inhibit_storing
= 0;
2626 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2628 int startpos
, endpos
;
2630 XSETMISC (overlay
, tail
);
2632 ostart
= OVERLAY_START (overlay
);
2633 oend
= OVERLAY_END (overlay
);
2634 endpos
= OVERLAY_POSITION (oend
);
2641 startpos
= OVERLAY_POSITION (ostart
);
2642 /* Count an interval if it either overlaps the range
2643 or is empty at the start of the range. */
2644 if ((beg
< endpos
&& startpos
< end
)
2645 || (startpos
== endpos
&& beg
== endpos
))
2649 /* The supplied vector is full.
2650 Either make it bigger, or don't store any more in it. */
2653 /* Make it work with an initial len == 0. */
2658 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2662 inhibit_storing
= 1;
2665 if (!inhibit_storing
)
2667 /* Keep counting overlays even if we can't return them all. */
2670 else if (startpos
< next
)
2674 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2676 int startpos
, endpos
;
2678 XSETMISC (overlay
, tail
);
2680 ostart
= OVERLAY_START (overlay
);
2681 oend
= OVERLAY_END (overlay
);
2682 startpos
= OVERLAY_POSITION (ostart
);
2685 if (startpos
< next
)
2689 endpos
= OVERLAY_POSITION (oend
);
2690 /* Count an interval if it either overlaps the range
2691 or is empty at the start of the range. */
2692 if ((beg
< endpos
&& startpos
< end
)
2693 || (startpos
== endpos
&& beg
== endpos
))
2699 /* Make it work with an initial len == 0. */
2704 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2708 inhibit_storing
= 1;
2711 if (!inhibit_storing
)
2715 else if (endpos
< beg
&& endpos
> prev
)
2727 /* Return non-zero if there exists an overlay with a non-nil
2728 `mouse-face' property overlapping OVERLAY. */
2731 mouse_face_overlay_overlaps (overlay
)
2732 Lisp_Object overlay
;
2734 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2735 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2737 Lisp_Object
*v
, tem
;
2740 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2741 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2744 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2745 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2748 for (i
= 0; i
< n
; ++i
)
2749 if (!EQ (v
[i
], overlay
)
2750 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2759 /* Fast function to just test if we're at an overlay boundary. */
2761 overlay_touches_p (pos
)
2764 Lisp_Object overlay
;
2765 struct Lisp_Overlay
*tail
;
2767 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2771 XSETMISC (overlay
,tail
);
2772 if (!GC_OVERLAYP (overlay
))
2775 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2778 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2782 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2786 XSETMISC (overlay
, tail
);
2787 if (!GC_OVERLAYP (overlay
))
2790 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2793 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2801 Lisp_Object overlay
;
2807 compare_overlays (v1
, v2
)
2808 const void *v1
, *v2
;
2810 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2811 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2812 if (s1
->priority
!= s2
->priority
)
2813 return s1
->priority
- s2
->priority
;
2814 if (s1
->beg
!= s2
->beg
)
2815 return s1
->beg
- s2
->beg
;
2816 if (s1
->end
!= s2
->end
)
2817 return s2
->end
- s1
->end
;
2821 /* Sort an array of overlays by priority. The array is modified in place.
2822 The return value is the new size; this may be smaller than the original
2823 size if some of the overlays were invalid or were window-specific. */
2825 sort_overlays (overlay_vec
, noverlays
, w
)
2826 Lisp_Object
*overlay_vec
;
2831 struct sortvec
*sortvec
;
2832 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2834 /* Put the valid and relevant overlays into sortvec. */
2836 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2839 Lisp_Object overlay
;
2841 overlay
= overlay_vec
[i
];
2842 if (OVERLAY_VALID (overlay
)
2843 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2844 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2846 /* If we're interested in a specific window, then ignore
2847 overlays that are limited to some other window. */
2852 window
= Foverlay_get (overlay
, Qwindow
);
2853 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2857 /* This overlay is good and counts: put it into sortvec. */
2858 sortvec
[j
].overlay
= overlay
;
2859 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2860 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2861 tem
= Foverlay_get (overlay
, Qpriority
);
2863 sortvec
[j
].priority
= XINT (tem
);
2865 sortvec
[j
].priority
= 0;
2871 /* Sort the overlays into the proper order: increasing priority. */
2874 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2876 for (i
= 0; i
< noverlays
; i
++)
2877 overlay_vec
[i
] = sortvec
[i
].overlay
;
2883 Lisp_Object string
, string2
;
2890 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2891 int size
; /* Allocated length of that array. */
2892 int used
; /* How much of the array is currently in use. */
2893 int bytes
; /* Total length of the strings in buf. */
2896 /* Buffers for storing information about the overlays touching a given
2897 position. These could be automatic variables in overlay_strings, but
2898 it's more efficient to hold onto the memory instead of repeatedly
2899 allocating and freeing it. */
2900 static struct sortstrlist overlay_heads
, overlay_tails
;
2901 static unsigned char *overlay_str_buf
;
2903 /* Allocated length of overlay_str_buf. */
2904 static int overlay_str_len
;
2906 /* A comparison function suitable for passing to qsort. */
2908 cmp_for_strings (as1
, as2
)
2911 struct sortstr
*s1
= (struct sortstr
*)as1
;
2912 struct sortstr
*s2
= (struct sortstr
*)as2
;
2913 if (s1
->size
!= s2
->size
)
2914 return s2
->size
- s1
->size
;
2915 if (s1
->priority
!= s2
->priority
)
2916 return s1
->priority
- s2
->priority
;
2921 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2922 struct sortstrlist
*ssl
;
2923 Lisp_Object str
, str2
, pri
;
2928 if (ssl
->used
== ssl
->size
)
2934 ssl
->buf
= ((struct sortstr
*)
2935 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2937 ssl
->buf
[ssl
->used
].string
= str
;
2938 ssl
->buf
[ssl
->used
].string2
= str2
;
2939 ssl
->buf
[ssl
->used
].size
= size
;
2940 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2943 if (NILP (current_buffer
->enable_multibyte_characters
))
2944 nbytes
= SCHARS (str
);
2945 else if (! STRING_MULTIBYTE (str
))
2946 nbytes
= count_size_as_multibyte (SDATA (str
),
2949 nbytes
= SBYTES (str
);
2951 ssl
->bytes
+= nbytes
;
2955 if (NILP (current_buffer
->enable_multibyte_characters
))
2956 nbytes
= SCHARS (str2
);
2957 else if (! STRING_MULTIBYTE (str2
))
2958 nbytes
= count_size_as_multibyte (SDATA (str2
),
2961 nbytes
= SBYTES (str2
);
2963 ssl
->bytes
+= nbytes
;
2967 /* Return the concatenation of the strings associated with overlays that
2968 begin or end at POS, ignoring overlays that are specific to a window
2969 other than W. The strings are concatenated in the appropriate order:
2970 shorter overlays nest inside longer ones, and higher priority inside
2971 lower. Normally all of the after-strings come first, but zero-sized
2972 overlays have their after-strings ride along with the before-strings
2973 because it would look strange to print them inside-out.
2975 Returns the string length, and stores the contents indirectly through
2976 PSTR, if that variable is non-null. The string may be overwritten by
2977 subsequent calls. */
2980 overlay_strings (pos
, w
, pstr
)
2983 unsigned char **pstr
;
2985 Lisp_Object overlay
, window
, str
;
2986 struct Lisp_Overlay
*ov
;
2987 int startpos
, endpos
;
2988 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2990 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2991 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2992 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
2994 XSETMISC (overlay
, ov
);
2995 eassert (OVERLAYP (overlay
));
2997 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2998 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3001 if (endpos
!= pos
&& startpos
!= pos
)
3003 window
= Foverlay_get (overlay
, Qwindow
);
3004 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3007 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3008 record_overlay_string (&overlay_heads
, str
,
3010 ? Foverlay_get (overlay
, Qafter_string
)
3012 Foverlay_get (overlay
, Qpriority
),
3014 else if (endpos
== pos
3015 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3016 record_overlay_string (&overlay_tails
, str
, Qnil
,
3017 Foverlay_get (overlay
, Qpriority
),
3020 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3022 XSETMISC (overlay
, ov
);
3023 eassert (OVERLAYP (overlay
));
3025 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3026 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3029 if (endpos
!= pos
&& startpos
!= pos
)
3031 window
= Foverlay_get (overlay
, Qwindow
);
3032 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3035 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3036 record_overlay_string (&overlay_heads
, str
,
3038 ? Foverlay_get (overlay
, Qafter_string
)
3040 Foverlay_get (overlay
, Qpriority
),
3042 else if (endpos
== pos
3043 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3044 record_overlay_string (&overlay_tails
, str
, Qnil
,
3045 Foverlay_get (overlay
, Qpriority
),
3048 if (overlay_tails
.used
> 1)
3049 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3051 if (overlay_heads
.used
> 1)
3052 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3054 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3059 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3061 if (total
> overlay_str_len
)
3063 overlay_str_len
= total
;
3064 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3067 p
= overlay_str_buf
;
3068 for (i
= overlay_tails
.used
; --i
>= 0;)
3071 tem
= overlay_tails
.buf
[i
].string
;
3072 nbytes
= copy_text (SDATA (tem
), p
,
3074 STRING_MULTIBYTE (tem
), multibyte
);
3077 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3080 tem
= overlay_heads
.buf
[i
].string
;
3081 nbytes
= copy_text (SDATA (tem
), p
,
3083 STRING_MULTIBYTE (tem
), multibyte
);
3085 tem
= overlay_heads
.buf
[i
].string2
;
3088 nbytes
= copy_text (SDATA (tem
), p
,
3090 STRING_MULTIBYTE (tem
), multibyte
);
3094 if (p
!= overlay_str_buf
+ total
)
3097 *pstr
= overlay_str_buf
;
3103 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3106 recenter_overlay_lists (buf
, pos
)
3110 Lisp_Object overlay
, beg
, end
;
3111 struct Lisp_Overlay
*prev
, *tail
, *next
;
3113 /* See if anything in overlays_before should move to overlays_after. */
3115 /* We don't strictly need prev in this loop; it should always be nil.
3116 But we use it for symmetry and in case that should cease to be true
3117 with some future change. */
3119 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3122 XSETMISC (overlay
, tail
);
3124 /* If the overlay is not valid, get rid of it. */
3125 if (!OVERLAY_VALID (overlay
))
3130 /* Splice the cons cell TAIL out of overlays_before. */
3134 buf
->overlays_before
= next
;
3140 beg
= OVERLAY_START (overlay
);
3141 end
= OVERLAY_END (overlay
);
3143 if (OVERLAY_POSITION (end
) > pos
)
3145 /* OVERLAY needs to be moved. */
3146 int where
= OVERLAY_POSITION (beg
);
3147 struct Lisp_Overlay
*other
, *other_prev
;
3149 /* Splice the cons cell TAIL out of overlays_before. */
3153 buf
->overlays_before
= next
;
3155 /* Search thru overlays_after for where to put it. */
3157 for (other
= buf
->overlays_after
; other
;
3158 other_prev
= other
, other
= other
->next
)
3160 Lisp_Object otherbeg
, otheroverlay
;
3162 XSETMISC (otheroverlay
, other
);
3163 eassert (OVERLAY_VALID (otheroverlay
));
3165 otherbeg
= OVERLAY_START (otheroverlay
);
3166 if (OVERLAY_POSITION (otherbeg
) >= where
)
3170 /* Add TAIL to overlays_after before OTHER. */
3173 other_prev
->next
= tail
;
3175 buf
->overlays_after
= tail
;
3179 /* We've reached the things that should stay in overlays_before.
3180 All the rest of overlays_before must end even earlier,
3185 /* See if anything in overlays_after should be in overlays_before. */
3187 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3190 XSETMISC (overlay
, tail
);
3192 /* If the overlay is not valid, get rid of it. */
3193 if (!OVERLAY_VALID (overlay
))
3198 /* Splice the cons cell TAIL out of overlays_after. */
3202 buf
->overlays_after
= next
;
3208 beg
= OVERLAY_START (overlay
);
3209 end
= OVERLAY_END (overlay
);
3211 /* Stop looking, when we know that nothing further
3212 can possibly end before POS. */
3213 if (OVERLAY_POSITION (beg
) > pos
)
3216 if (OVERLAY_POSITION (end
) <= pos
)
3218 /* OVERLAY needs to be moved. */
3219 int where
= OVERLAY_POSITION (end
);
3220 struct Lisp_Overlay
*other
, *other_prev
;
3222 /* Splice the cons cell TAIL out of overlays_after. */
3226 buf
->overlays_after
= next
;
3228 /* Search thru overlays_before for where to put it. */
3230 for (other
= buf
->overlays_before
; other
;
3231 other_prev
= other
, other
= other
->next
)
3233 Lisp_Object otherend
, otheroverlay
;
3235 XSETMISC (otheroverlay
, other
);
3236 eassert (OVERLAY_VALID (otheroverlay
));
3238 otherend
= OVERLAY_END (otheroverlay
);
3239 if (OVERLAY_POSITION (otherend
) <= where
)
3243 /* Add TAIL to overlays_before before OTHER. */
3246 other_prev
->next
= tail
;
3248 buf
->overlays_before
= tail
;
3253 buf
->overlay_center
= pos
;
3257 adjust_overlays_for_insert (pos
, length
)
3261 /* After an insertion, the lists are still sorted properly,
3262 but we may need to update the value of the overlay center. */
3263 if (current_buffer
->overlay_center
>= pos
)
3264 current_buffer
->overlay_center
+= length
;
3268 adjust_overlays_for_delete (pos
, length
)
3272 if (current_buffer
->overlay_center
< pos
)
3273 /* The deletion was to our right. No change needed; the before- and
3274 after-lists are still consistent. */
3276 else if (current_buffer
->overlay_center
> pos
+ length
)
3277 /* The deletion was to our left. We need to adjust the center value
3278 to account for the change in position, but the lists are consistent
3279 given the new value. */
3280 current_buffer
->overlay_center
-= length
;
3282 /* We're right in the middle. There might be things on the after-list
3283 that now belong on the before-list. Recentering will move them,
3284 and also update the center point. */
3285 recenter_overlay_lists (current_buffer
, pos
);
3288 /* Fix up overlays that were garbled as a result of permuting markers
3289 in the range START through END. Any overlay with at least one
3290 endpoint in this range will need to be unlinked from the overlay
3291 list and reinserted in its proper place.
3292 Such an overlay might even have negative size at this point.
3293 If so, we'll reverse the endpoints. Can you think of anything
3294 better to do in this situation? */
3296 fix_overlays_in_range (start
, end
)
3297 register int start
, end
;
3299 Lisp_Object overlay
;
3300 struct Lisp_Overlay
*before_list
, *after_list
;
3301 /* These are either nil, indicating that before_list or after_list
3302 should be assigned, or the cons cell the cdr of which should be
3304 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3305 /* 'Parent', likewise, indicates a cons cell or
3306 current_buffer->overlays_before or overlays_after, depending
3307 which loop we're in. */
3308 struct Lisp_Overlay
*tail
, *parent
;
3309 int startpos
, endpos
;
3311 /* This algorithm shifts links around instead of consing and GCing.
3312 The loop invariant is that before_list (resp. after_list) is a
3313 well-formed list except that its last element, the CDR of beforep
3314 (resp. afterp) if beforep (afterp) isn't nil or before_list
3315 (after_list) if it is, is still uninitialized. So it's not a bug
3316 that before_list isn't initialized, although it may look
3318 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3320 XSETMISC (overlay
, tail
);
3321 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3324 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3326 || (startpos
>= start
&& startpos
< end
))
3328 /* If the overlay is backwards, fix that now. */
3329 if (startpos
> endpos
)
3332 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3334 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3336 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3338 /* Add it to the end of the wrong list. Later on,
3339 recenter_overlay_lists will move it to the right place. */
3340 if (endpos
< current_buffer
->overlay_center
)
3345 afterp
->next
= tail
;
3353 beforep
->next
= tail
;
3357 current_buffer
->overlays_before
= tail
->next
;
3359 parent
->next
= tail
->next
;
3363 parent
= tail
, tail
= parent
->next
;
3365 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3367 XSETMISC (overlay
, tail
);
3368 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3369 if (startpos
>= end
)
3371 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3372 if (startpos
>= start
3373 || (endpos
>= start
&& endpos
< end
))
3375 if (startpos
> endpos
)
3378 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3380 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3382 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3384 if (endpos
< current_buffer
->overlay_center
)
3389 afterp
->next
= tail
;
3397 beforep
->next
= tail
;
3401 current_buffer
->overlays_after
= tail
->next
;
3403 parent
->next
= tail
->next
;
3407 parent
= tail
, tail
= parent
->next
;
3410 /* Splice the constructed (wrong) lists into the buffer's lists,
3411 and let the recenter function make it sane again. */
3414 beforep
->next
= current_buffer
->overlays_before
;
3415 current_buffer
->overlays_before
= before_list
;
3417 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3421 afterp
->next
= current_buffer
->overlays_after
;
3422 current_buffer
->overlays_after
= after_list
;
3424 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3427 /* We have two types of overlay: the one whose ending marker is
3428 after-insertion-marker (this is the usual case) and the one whose
3429 ending marker is before-insertion-marker. When `overlays_before'
3430 contains overlays of the latter type and the former type in this
3431 order and both overlays end at inserting position, inserting a text
3432 increases only the ending marker of the latter type, which results
3433 in incorrect ordering of `overlays_before'.
3435 This function fixes ordering of overlays in the slot
3436 `overlays_before' of the buffer *BP. Before the insertion, `point'
3437 was at PREV, and now is at POS. */
3440 fix_overlays_before (bp
, prev
, pos
)
3442 EMACS_INT prev
, pos
;
3444 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3445 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3449 /* After the insertion, the several overlays may be in incorrect
3450 order. The possibility is that, in the list `overlays_before',
3451 an overlay which ends at POS appears after an overlay which ends
3452 at PREV. Since POS is greater than PREV, we must fix the
3453 ordering of these overlays, by moving overlays ends at POS before
3454 the overlays ends at PREV. */
3456 /* At first, find a place where disordered overlays should be linked
3457 in. It is where an overlay which end before POS exists. (i.e. an
3458 overlay whose ending marker is after-insertion-marker if disorder
3461 && (XSETMISC (tem
, tail
),
3462 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3468 /* If we don't find such an overlay,
3469 or the found one ends before PREV,
3470 or the found one is the last one in the list,
3471 we don't have to fix anything. */
3472 if (!tail
|| end
< prev
|| !tail
->next
)
3475 right_pair
= parent
;
3479 /* Now, end position of overlays in the list TAIL should be before
3480 or equal to PREV. In the loop, an overlay which ends at POS is
3481 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3482 we found an overlay which ends before PREV, the remaining
3483 overlays are in correct order. */
3486 XSETMISC (tem
, tail
);
3487 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3490 { /* This overlay is disordered. */
3491 struct Lisp_Overlay
*found
= tail
;
3493 /* Unlink the found overlay. */
3495 parent
->next
= tail
;
3496 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3497 and link it into the right place. */
3500 found
->next
= bp
->overlays_before
;
3501 bp
->overlays_before
= found
;
3505 found
->next
= right_pair
->next
;
3506 right_pair
->next
= found
;
3509 else if (end
== prev
)
3514 else /* No more disordered overlay. */
3519 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3520 doc
: /* Return t if OBJECT is an overlay. */)
3524 return (OVERLAYP (object
) ? Qt
: Qnil
);
3527 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3528 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3529 If omitted, BUFFER defaults to the current buffer.
3530 BEG and END may be integers or markers.
3531 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3532 front delimiter advance when text is inserted there.
3533 The fifth arg REAR-ADVANCE, if non-nil, makes the
3534 rear delimiter advance when text is inserted there. */)
3535 (beg
, end
, buffer
, front_advance
, rear_advance
)
3536 Lisp_Object beg
, end
, buffer
;
3537 Lisp_Object front_advance
, rear_advance
;
3539 Lisp_Object overlay
;
3543 XSETBUFFER (buffer
, current_buffer
);
3545 CHECK_BUFFER (buffer
);
3547 && ! EQ (Fmarker_buffer (beg
), buffer
))
3548 error ("Marker points into wrong buffer");
3550 && ! EQ (Fmarker_buffer (end
), buffer
))
3551 error ("Marker points into wrong buffer");
3553 CHECK_NUMBER_COERCE_MARKER (beg
);
3554 CHECK_NUMBER_COERCE_MARKER (end
);
3556 if (XINT (beg
) > XINT (end
))
3559 temp
= beg
; beg
= end
; end
= temp
;
3562 b
= XBUFFER (buffer
);
3564 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3565 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3567 if (!NILP (front_advance
))
3568 XMARKER (beg
)->insertion_type
= 1;
3569 if (!NILP (rear_advance
))
3570 XMARKER (end
)->insertion_type
= 1;
3572 overlay
= allocate_misc ();
3573 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3574 XOVERLAY (overlay
)->start
= beg
;
3575 XOVERLAY (overlay
)->end
= end
;
3576 XOVERLAY (overlay
)->plist
= Qnil
;
3577 XOVERLAY (overlay
)->next
= NULL
;
3579 /* Put the new overlay on the wrong list. */
3580 end
= OVERLAY_END (overlay
);
3581 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3583 if (b
->overlays_after
)
3584 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3585 b
->overlays_after
= XOVERLAY (overlay
);
3589 if (b
->overlays_before
)
3590 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3591 b
->overlays_before
= XOVERLAY (overlay
);
3594 /* This puts it in the right list, and in the right order. */
3595 recenter_overlay_lists (b
, b
->overlay_center
);
3597 /* We don't need to redisplay the region covered by the overlay, because
3598 the overlay has no properties at the moment. */
3603 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3606 modify_overlay (buf
, start
, end
)
3608 EMACS_INT start
, end
;
3617 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3619 /* If this is a buffer not in the selected window,
3620 we must do other windows. */
3621 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3622 windows_or_buffers_changed
= 1;
3623 /* If multiple windows show this buffer, we must do other windows. */
3624 else if (buffer_shared
> 1)
3625 windows_or_buffers_changed
= 1;
3627 ++BUF_OVERLAY_MODIFF (buf
);
3631 Lisp_Object
Fdelete_overlay ();
3633 static struct Lisp_Overlay
*
3634 unchain_overlay (list
, overlay
)
3635 struct Lisp_Overlay
*list
, *overlay
;
3637 struct Lisp_Overlay
*tmp
, *prev
;
3638 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3642 prev
->next
= tmp
->next
;
3645 overlay
->next
= NULL
;
3651 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3652 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3653 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3654 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3656 (overlay
, beg
, end
, buffer
)
3657 Lisp_Object overlay
, beg
, end
, buffer
;
3659 struct buffer
*b
, *ob
;
3660 Lisp_Object obuffer
;
3661 int count
= SPECPDL_INDEX ();
3663 CHECK_OVERLAY (overlay
);
3665 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3667 XSETBUFFER (buffer
, current_buffer
);
3668 CHECK_BUFFER (buffer
);
3671 && ! EQ (Fmarker_buffer (beg
), buffer
))
3672 error ("Marker points into wrong buffer");
3674 && ! EQ (Fmarker_buffer (end
), buffer
))
3675 error ("Marker points into wrong buffer");
3677 CHECK_NUMBER_COERCE_MARKER (beg
);
3678 CHECK_NUMBER_COERCE_MARKER (end
);
3680 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3681 return Fdelete_overlay (overlay
);
3683 if (XINT (beg
) > XINT (end
))
3686 temp
= beg
; beg
= end
; end
= temp
;
3689 specbind (Qinhibit_quit
, Qt
);
3691 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3692 b
= XBUFFER (buffer
);
3693 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3695 /* If the overlay has changed buffers, do a thorough redisplay. */
3696 if (!EQ (buffer
, obuffer
))
3698 /* Redisplay where the overlay was. */
3699 if (!NILP (obuffer
))
3704 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3705 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3707 modify_overlay (ob
, o_beg
, o_end
);
3710 /* Redisplay where the overlay is going to be. */
3711 modify_overlay (b
, XINT (beg
), XINT (end
));
3714 /* Redisplay the area the overlay has just left, or just enclosed. */
3718 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3719 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3721 if (o_beg
== XINT (beg
))
3722 modify_overlay (b
, o_end
, XINT (end
));
3723 else if (o_end
== XINT (end
))
3724 modify_overlay (b
, o_beg
, XINT (beg
));
3727 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3728 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3729 modify_overlay (b
, o_beg
, o_end
);
3733 if (!NILP (obuffer
))
3736 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3738 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3739 eassert (XOVERLAY (overlay
)->next
== NULL
);
3742 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3743 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3745 /* Put the overlay on the wrong list. */
3746 end
= OVERLAY_END (overlay
);
3747 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3749 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3750 b
->overlays_after
= XOVERLAY (overlay
);
3754 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3755 b
->overlays_before
= XOVERLAY (overlay
);
3758 /* This puts it in the right list, and in the right order. */
3759 recenter_overlay_lists (b
, b
->overlay_center
);
3761 return unbind_to (count
, overlay
);
3764 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3765 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3767 Lisp_Object overlay
;
3771 int count
= SPECPDL_INDEX ();
3773 CHECK_OVERLAY (overlay
);
3775 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3779 b
= XBUFFER (buffer
);
3780 specbind (Qinhibit_quit
, Qt
);
3782 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3783 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3784 eassert (XOVERLAY (overlay
)->next
== NULL
);
3786 marker_position (OVERLAY_START (overlay
)),
3787 marker_position (OVERLAY_END (overlay
)));
3788 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3789 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3791 /* When deleting an overlay with before or after strings, turn off
3792 display optimizations for the affected buffer, on the basis that
3793 these strings may contain newlines. This is easier to do than to
3794 check for that situation during redisplay. */
3795 if (!windows_or_buffers_changed
3796 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3797 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3798 b
->prevent_redisplay_optimizations_p
= 1;
3800 return unbind_to (count
, Qnil
);
3803 /* Overlay dissection functions. */
3805 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3806 doc
: /* Return the position at which OVERLAY starts. */)
3808 Lisp_Object overlay
;
3810 CHECK_OVERLAY (overlay
);
3812 return (Fmarker_position (OVERLAY_START (overlay
)));
3815 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3816 doc
: /* Return the position at which OVERLAY ends. */)
3818 Lisp_Object overlay
;
3820 CHECK_OVERLAY (overlay
);
3822 return (Fmarker_position (OVERLAY_END (overlay
)));
3825 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3826 doc
: /* Return the buffer OVERLAY belongs to. */)
3828 Lisp_Object overlay
;
3830 CHECK_OVERLAY (overlay
);
3832 return Fmarker_buffer (OVERLAY_START (overlay
));
3835 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3836 doc
: /* Return a list of the properties on OVERLAY.
3837 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3840 Lisp_Object overlay
;
3842 CHECK_OVERLAY (overlay
);
3844 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3848 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3849 doc
: /* Return a list of the overlays that contain position POS. */)
3854 Lisp_Object
*overlay_vec
;
3858 CHECK_NUMBER_COERCE_MARKER (pos
);
3861 /* We can't use alloca here because overlays_at can call xrealloc. */
3862 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3864 /* Put all the overlays we want in a vector in overlay_vec.
3865 Store the length in len. */
3866 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3867 (int *) 0, (int *) 0, 0);
3869 /* Make a list of them all. */
3870 result
= Flist (noverlays
, overlay_vec
);
3872 xfree (overlay_vec
);
3876 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3877 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3878 Overlap means that at least one character is contained within the overlay
3879 and also contained within the specified region.
3880 Empty overlays are included in the result if they are located at BEG
3881 or between BEG and END. */)
3883 Lisp_Object beg
, end
;
3886 Lisp_Object
*overlay_vec
;
3890 CHECK_NUMBER_COERCE_MARKER (beg
);
3891 CHECK_NUMBER_COERCE_MARKER (end
);
3894 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3896 /* Put all the overlays we want in a vector in overlay_vec.
3897 Store the length in len. */
3898 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3899 (int *) 0, (int *) 0);
3901 /* Make a list of them all. */
3902 result
= Flist (noverlays
, overlay_vec
);
3904 xfree (overlay_vec
);
3908 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3910 doc
: /* Return the next position after POS where an overlay starts or ends.
3911 If there are no more overlay boundaries after POS, return (point-max). */)
3917 Lisp_Object
*overlay_vec
;
3921 CHECK_NUMBER_COERCE_MARKER (pos
);
3924 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3926 /* Put all the overlays we want in a vector in overlay_vec.
3927 Store the length in len.
3928 endpos gets the position where the next overlay starts. */
3929 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3930 &endpos
, (int *) 0, 1);
3932 /* If any of these overlays ends before endpos,
3933 use its ending point instead. */
3934 for (i
= 0; i
< noverlays
; i
++)
3939 oend
= OVERLAY_END (overlay_vec
[i
]);
3940 oendpos
= OVERLAY_POSITION (oend
);
3941 if (oendpos
< endpos
)
3945 xfree (overlay_vec
);
3946 return make_number (endpos
);
3949 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3950 Sprevious_overlay_change
, 1, 1, 0,
3951 doc
: /* Return the previous position before POS where an overlay starts or ends.
3952 If there are no more overlay boundaries before POS, return (point-min). */)
3958 Lisp_Object
*overlay_vec
;
3961 CHECK_NUMBER_COERCE_MARKER (pos
);
3963 /* At beginning of buffer, we know the answer;
3964 avoid bug subtracting 1 below. */
3965 if (XINT (pos
) == BEGV
)
3969 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3971 /* Put all the overlays we want in a vector in overlay_vec.
3972 Store the length in len.
3973 prevpos gets the position of the previous change. */
3974 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3975 (int *) 0, &prevpos
, 1);
3977 xfree (overlay_vec
);
3978 return make_number (prevpos
);
3981 /* These functions are for debugging overlays. */
3983 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3984 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3985 The car has all the overlays before the overlay center;
3986 the cdr has all the overlays after the overlay center.
3987 Recentering overlays moves overlays between these lists.
3988 The lists you get are copies, so that changing them has no effect.
3989 However, the overlays you get are the real objects that the buffer uses. */)
3992 struct Lisp_Overlay
*ol
;
3993 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
3994 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
3997 before
= Fcons (tmp
, before
);
3999 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4002 after
= Fcons (tmp
, after
);
4004 return Fcons (Fnreverse (before
), Fnreverse (after
));
4007 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4008 doc
: /* Recenter the overlays of the current buffer around position POS.
4009 That makes overlay lookup faster for positions near POS (but perhaps slower
4010 for positions far away from POS). */)
4014 CHECK_NUMBER_COERCE_MARKER (pos
);
4016 recenter_overlay_lists (current_buffer
, XINT (pos
));
4020 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4021 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4023 Lisp_Object overlay
, prop
;
4025 CHECK_OVERLAY (overlay
);
4026 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4029 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4030 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4031 (overlay
, prop
, value
)
4032 Lisp_Object overlay
, prop
, value
;
4034 Lisp_Object tail
, buffer
;
4037 CHECK_OVERLAY (overlay
);
4039 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4041 for (tail
= XOVERLAY (overlay
)->plist
;
4042 CONSP (tail
) && CONSP (XCDR (tail
));
4043 tail
= XCDR (XCDR (tail
)))
4044 if (EQ (XCAR (tail
), prop
))
4046 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4047 XSETCAR (XCDR (tail
), value
);
4050 /* It wasn't in the list, so add it to the front. */
4051 changed
= !NILP (value
);
4052 XOVERLAY (overlay
)->plist
4053 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4055 if (! NILP (buffer
))
4058 modify_overlay (XBUFFER (buffer
),
4059 marker_position (OVERLAY_START (overlay
)),
4060 marker_position (OVERLAY_END (overlay
)));
4061 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4062 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4063 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4064 Fdelete_overlay (overlay
);
4069 /* Subroutine of report_overlay_modification. */
4071 /* Lisp vector holding overlay hook functions to call.
4072 Vector elements come in pairs.
4073 Each even-index element is a list of hook functions.
4074 The following odd-index element is the overlay they came from.
4076 Before the buffer change, we fill in this vector
4077 as we call overlay hook functions.
4078 After the buffer change, we get the functions to call from this vector.
4079 This way we always call the same functions before and after the change. */
4080 static Lisp_Object last_overlay_modification_hooks
;
4082 /* Number of elements actually used in last_overlay_modification_hooks. */
4083 static int last_overlay_modification_hooks_used
;
4085 /* Add one functionlist/overlay pair
4086 to the end of last_overlay_modification_hooks. */
4089 add_overlay_mod_hooklist (functionlist
, overlay
)
4090 Lisp_Object functionlist
, overlay
;
4092 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4094 if (last_overlay_modification_hooks_used
== oldsize
)
4097 old
= last_overlay_modification_hooks
;
4098 last_overlay_modification_hooks
4099 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4100 bcopy (XVECTOR (old
)->contents
,
4101 XVECTOR (last_overlay_modification_hooks
)->contents
,
4102 sizeof (Lisp_Object
) * oldsize
);
4104 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4105 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4108 /* Run the modification-hooks of overlays that include
4109 any part of the text in START to END.
4110 If this change is an insertion, also
4111 run the insert-before-hooks of overlay starting at END,
4112 and the insert-after-hooks of overlay ending at START.
4114 This is called both before and after the modification.
4115 AFTER is nonzero when we call after the modification.
4117 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4118 When AFTER is nonzero, they are the start position,
4119 the position after the inserted new text,
4120 and the length of deleted or replaced old text. */
4123 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4124 Lisp_Object start
, end
;
4126 Lisp_Object arg1
, arg2
, arg3
;
4128 Lisp_Object prop
, overlay
;
4129 struct Lisp_Overlay
*tail
;
4130 /* 1 if this change is an insertion. */
4131 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4132 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4137 /* We used to run the functions as soon as we found them and only register
4138 them in last_overlay_modification_hooks for the purpose of the `after'
4139 case. But running elisp code as we traverse the list of overlays is
4140 painful because the list can be modified by the elisp code so we had to
4141 copy at several places. We now simply do a read-only traversal that
4142 only collects the functions to run and we run them afterwards. It's
4143 simpler, especially since all the code was already there. -stef */
4147 /* We are being called before a change.
4148 Scan the overlays to find the functions to call. */
4149 last_overlay_modification_hooks_used
= 0;
4150 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4152 int startpos
, endpos
;
4153 Lisp_Object ostart
, oend
;
4155 XSETMISC (overlay
, tail
);
4157 ostart
= OVERLAY_START (overlay
);
4158 oend
= OVERLAY_END (overlay
);
4159 endpos
= OVERLAY_POSITION (oend
);
4160 if (XFASTINT (start
) > endpos
)
4162 startpos
= OVERLAY_POSITION (ostart
);
4163 if (insertion
&& (XFASTINT (start
) == startpos
4164 || XFASTINT (end
) == startpos
))
4166 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4168 add_overlay_mod_hooklist (prop
, overlay
);
4170 if (insertion
&& (XFASTINT (start
) == endpos
4171 || XFASTINT (end
) == endpos
))
4173 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4175 add_overlay_mod_hooklist (prop
, overlay
);
4177 /* Test for intersecting intervals. This does the right thing
4178 for both insertion and deletion. */
4179 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4181 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4183 add_overlay_mod_hooklist (prop
, overlay
);
4187 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4189 int startpos
, endpos
;
4190 Lisp_Object ostart
, oend
;
4192 XSETMISC (overlay
, tail
);
4194 ostart
= OVERLAY_START (overlay
);
4195 oend
= OVERLAY_END (overlay
);
4196 startpos
= OVERLAY_POSITION (ostart
);
4197 endpos
= OVERLAY_POSITION (oend
);
4198 if (XFASTINT (end
) < startpos
)
4200 if (insertion
&& (XFASTINT (start
) == startpos
4201 || XFASTINT (end
) == startpos
))
4203 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4205 add_overlay_mod_hooklist (prop
, overlay
);
4207 if (insertion
&& (XFASTINT (start
) == endpos
4208 || XFASTINT (end
) == endpos
))
4210 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4212 add_overlay_mod_hooklist (prop
, overlay
);
4214 /* Test for intersecting intervals. This does the right thing
4215 for both insertion and deletion. */
4216 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4218 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4220 add_overlay_mod_hooklist (prop
, overlay
);
4225 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4227 /* Call the functions recorded in last_overlay_modification_hooks.
4228 First copy the vector contents, in case some of these hooks
4229 do subsequent modification of the buffer. */
4230 int size
= last_overlay_modification_hooks_used
;
4231 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4234 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4235 copy
, size
* sizeof (Lisp_Object
));
4237 gcpro1
.nvars
= size
;
4239 for (i
= 0; i
< size
;)
4241 Lisp_Object prop
, overlay
;
4243 overlay
= copy
[i
++];
4244 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4251 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4252 Lisp_Object list
, overlay
;
4254 Lisp_Object arg1
, arg2
, arg3
;
4256 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4258 GCPRO4 (list
, arg1
, arg2
, arg3
);
4260 while (CONSP (list
))
4263 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4265 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4271 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4274 evaporate_overlays (pos
)
4277 Lisp_Object overlay
, hit_list
;
4278 struct Lisp_Overlay
*tail
;
4281 if (pos
<= current_buffer
->overlay_center
)
4282 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4285 XSETMISC (overlay
, tail
);
4286 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4289 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4290 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4291 hit_list
= Fcons (overlay
, hit_list
);
4294 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4297 XSETMISC (overlay
, tail
);
4298 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4301 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4302 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4303 hit_list
= Fcons (overlay
, hit_list
);
4305 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4306 Fdelete_overlay (XCAR (hit_list
));
4309 /* Somebody has tried to store a value with an unacceptable type
4310 in the slot with offset OFFSET. */
4313 buffer_slot_type_mismatch (offset
)
4319 switch (XINT (PER_BUFFER_TYPE (offset
)))
4322 type_name
= "integers";
4326 type_name
= "strings";
4330 type_name
= "symbols";
4337 sym
= PER_BUFFER_SYMBOL (offset
);
4338 error ("Only %s should be stored in the buffer-local variable %s",
4339 type_name
, SDATA (SYMBOL_NAME (sym
)));
4343 /***********************************************************************
4344 Allocation with mmap
4345 ***********************************************************************/
4347 #ifdef USE_MMAP_FOR_BUFFERS
4349 #include <sys/types.h>
4350 #include <sys/mman.h>
4353 #ifdef MAP_ANONYMOUS
4354 #define MAP_ANON MAP_ANONYMOUS
4361 #define MAP_FAILED ((void *) -1)
4374 /* Memory is allocated in regions which are mapped using mmap(2).
4375 The current implementation lets the system select mapped
4376 addresses; we're not using MAP_FIXED in general, except when
4377 trying to enlarge regions.
4379 Each mapped region starts with a mmap_region structure, the user
4380 area starts after that structure, aligned to MEM_ALIGN.
4382 +-----------------------+
4383 | struct mmap_info + |
4385 +-----------------------+
4389 +-----------------------+ */
4393 /* User-specified size. */
4394 size_t nbytes_specified
;
4396 /* Number of bytes mapped */
4397 size_t nbytes_mapped
;
4399 /* Pointer to the location holding the address of the memory
4400 allocated with the mmap'd block. The variable actually points
4401 after this structure. */
4404 /* Next and previous in list of all mmap'd regions. */
4405 struct mmap_region
*next
, *prev
;
4408 /* Doubly-linked list of mmap'd regions. */
4410 static struct mmap_region
*mmap_regions
;
4412 /* File descriptor for mmap. If we don't have anonymous mapping,
4413 /dev/zero will be opened on it. */
4417 /* Temporary storage for mmap_set_vars, see there. */
4419 static struct mmap_region
*mmap_regions_1
;
4420 static int mmap_fd_1
;
4422 /* Page size on this system. */
4424 static int mmap_page_size
;
4426 /* 1 means mmap has been intialized. */
4428 static int mmap_initialized_p
;
4430 /* Value is X rounded up to the next multiple of N. */
4432 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4434 /* Size of mmap_region structure plus padding. */
4436 #define MMAP_REGION_STRUCT_SIZE \
4437 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4439 /* Given a pointer P to the start of the user-visible part of a mapped
4440 region, return a pointer to the start of the region. */
4442 #define MMAP_REGION(P) \
4443 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4445 /* Given a pointer P to the start of a mapped region, return a pointer
4446 to the start of the user-visible part of the region. */
4448 #define MMAP_USER_AREA(P) \
4449 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4451 #define MEM_ALIGN sizeof (double)
4453 /* Predicate returning true if part of the address range [START .. END]
4454 is currently mapped. Used to prevent overwriting an existing
4457 Default is to conservativly assume the address range is occupied by
4458 something else. This can be overridden by system configuration
4459 files if system-specific means to determine this exists. */
4461 #ifndef MMAP_ALLOCATED_P
4462 #define MMAP_ALLOCATED_P(start, end) 1
4465 /* Function prototypes. */
4467 static int mmap_free_1
P_ ((struct mmap_region
*));
4468 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4469 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4470 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4471 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4472 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4473 static void mmap_init
P_ ((void));
4476 /* Return a region overlapping address range START...END, or null if
4477 none. END is not including, i.e. the last byte in the range
4480 static struct mmap_region
*
4481 mmap_find (start
, end
)
4482 POINTER_TYPE
*start
, *end
;
4484 struct mmap_region
*r
;
4485 char *s
= (char *) start
, *e
= (char *) end
;
4487 for (r
= mmap_regions
; r
; r
= r
->next
)
4489 char *rstart
= (char *) r
;
4490 char *rend
= rstart
+ r
->nbytes_mapped
;
4492 if (/* First byte of range, i.e. START, in this region? */
4493 (s
>= rstart
&& s
< rend
)
4494 /* Last byte of range, i.e. END - 1, in this region? */
4495 || (e
> rstart
&& e
<= rend
)
4496 /* First byte of this region in the range? */
4497 || (rstart
>= s
&& rstart
< e
)
4498 /* Last byte of this region in the range? */
4499 || (rend
> s
&& rend
<= e
))
4507 /* Unmap a region. P is a pointer to the start of the user-araa of
4508 the region. Value is non-zero if successful. */
4512 struct mmap_region
*r
;
4515 r
->next
->prev
= r
->prev
;
4517 r
->prev
->next
= r
->next
;
4519 mmap_regions
= r
->next
;
4521 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4523 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4531 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4532 Value is non-zero if successful. */
4535 mmap_enlarge (r
, npages
)
4536 struct mmap_region
*r
;
4539 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4545 /* Unmap pages at the end of the region. */
4546 nbytes
= - npages
* mmap_page_size
;
4547 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4548 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4551 r
->nbytes_mapped
-= nbytes
;
4555 else if (npages
> 0)
4557 nbytes
= npages
* mmap_page_size
;
4559 /* Try to map additional pages at the end of the region. We
4560 cannot do this if the address range is already occupied by
4561 something else because mmap deletes any previous mapping.
4562 I'm not sure this is worth doing, let's see. */
4563 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4567 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4568 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4569 if (p
== MAP_FAILED
)
4570 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4571 else if (p
!= (POINTER_TYPE
*) region_end
)
4573 /* Kernels are free to choose a different address. In
4574 that case, unmap what we've mapped above; we have
4576 if (munmap (p
, nbytes
) == -1)
4577 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4581 r
->nbytes_mapped
+= nbytes
;
4591 /* Set or reset variables holding references to mapped regions. If
4592 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4593 non-zero, set all variables to the start of the user-areas
4596 This function is called from Fdump_emacs to ensure that the dumped
4597 Emacs doesn't contain references to memory that won't be mapped
4598 when Emacs starts. */
4601 mmap_set_vars (restore_p
)
4604 struct mmap_region
*r
;
4608 mmap_regions
= mmap_regions_1
;
4609 mmap_fd
= mmap_fd_1
;
4610 for (r
= mmap_regions
; r
; r
= r
->next
)
4611 *r
->var
= MMAP_USER_AREA (r
);
4615 for (r
= mmap_regions
; r
; r
= r
->next
)
4617 mmap_regions_1
= mmap_regions
;
4618 mmap_regions
= NULL
;
4619 mmap_fd_1
= mmap_fd
;
4625 /* Allocate a block of storage large enough to hold NBYTES bytes of
4626 data. A pointer to the data is returned in *VAR. VAR is thus the
4627 address of some variable which will use the data area.
4629 The allocation of 0 bytes is valid.
4631 If we can't allocate the necessary memory, set *VAR to null, and
4634 static POINTER_TYPE
*
4635 mmap_alloc (var
, nbytes
)
4644 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4645 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4648 if (p
== MAP_FAILED
)
4650 if (errno
!= ENOMEM
)
4651 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4656 struct mmap_region
*r
= (struct mmap_region
*) p
;
4658 r
->nbytes_specified
= nbytes
;
4659 r
->nbytes_mapped
= map
;
4662 r
->next
= mmap_regions
;
4667 p
= MMAP_USER_AREA (p
);
4674 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4675 resize it to size NBYTES. Change *VAR to reflect the new block,
4676 and return this value. If more memory cannot be allocated, then
4677 leave *VAR unchanged, and return null. */
4679 static POINTER_TYPE
*
4680 mmap_realloc (var
, nbytes
)
4684 POINTER_TYPE
*result
;
4689 result
= mmap_alloc (var
, nbytes
);
4690 else if (nbytes
== 0)
4693 result
= mmap_alloc (var
, nbytes
);
4697 struct mmap_region
*r
= MMAP_REGION (*var
);
4698 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4703 POINTER_TYPE
*old_ptr
= *var
;
4705 /* Try to map additional pages at the end of the region.
4706 If that fails, allocate a new region, copy data
4707 from the old region, then free it. */
4708 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4711 r
->nbytes_specified
= nbytes
;
4712 *var
= result
= old_ptr
;
4714 else if (mmap_alloc (var
, nbytes
))
4716 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4717 mmap_free_1 (MMAP_REGION (old_ptr
));
4719 r
= MMAP_REGION (result
);
4720 r
->nbytes_specified
= nbytes
;
4728 else if (room
- nbytes
>= mmap_page_size
)
4730 /* Shrinking by at least a page. Let's give some
4731 memory back to the system.
4733 The extra parens are to make the division happens first,
4734 on positive values, so we know it will round towards
4736 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4738 r
->nbytes_specified
= nbytes
;
4742 /* Leave it alone. */
4744 r
->nbytes_specified
= nbytes
;
4752 /* Free a block of relocatable storage whose data is pointed to by
4753 PTR. Store 0 in *PTR to show there's no block allocated. */
4763 mmap_free_1 (MMAP_REGION (*var
));
4769 /* Perform necessary intializations for the use of mmap. */
4775 /* The value of mmap_fd is initially 0 in temacs, and -1
4776 in a dumped Emacs. */
4779 /* No anonymous mmap -- we need the file descriptor. */
4780 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4782 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4784 #endif /* MAP_ANON == 0 */
4786 if (mmap_initialized_p
)
4788 mmap_initialized_p
= 1;
4794 mmap_page_size
= getpagesize ();
4797 #endif /* USE_MMAP_FOR_BUFFERS */
4801 /***********************************************************************
4802 Buffer-text Allocation
4803 ***********************************************************************/
4806 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4807 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4808 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4809 #endif /* REL_ALLOC */
4812 /* Allocate NBYTES bytes for buffer B's text buffer. */
4815 alloc_buffer_text (b
, nbytes
)
4822 #if defined USE_MMAP_FOR_BUFFERS
4823 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4824 #elif defined REL_ALLOC
4825 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4827 p
= xmalloc (nbytes
);
4836 b
->text
->beg
= (unsigned char *) p
;
4840 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4844 enlarge_buffer_text (b
, delta
)
4849 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4852 #if defined USE_MMAP_FOR_BUFFERS
4853 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4854 #elif defined REL_ALLOC
4855 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4857 p
= xrealloc (b
->text
->beg
, nbytes
);
4866 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4871 /* Free buffer B's text buffer. */
4874 free_buffer_text (b
)
4879 #if defined USE_MMAP_FOR_BUFFERS
4880 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4881 #elif defined REL_ALLOC
4882 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4884 xfree (b
->text
->beg
);
4887 BUF_BEG_ADDR (b
) = NULL
;
4893 /***********************************************************************
4895 ***********************************************************************/
4902 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4904 /* Make sure all markable slots in buffer_defaults
4905 are initialized reasonably, so mark_buffer won't choke. */
4906 reset_buffer (&buffer_defaults
);
4907 reset_buffer_local_variables (&buffer_defaults
, 1);
4908 reset_buffer (&buffer_local_symbols
);
4909 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4910 /* Prevent GC from getting confused. */
4911 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4912 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4913 BUF_INTERVALS (&buffer_defaults
) = 0;
4914 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4915 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4916 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4918 /* Set up the default values of various buffer slots. */
4919 /* Must do these before making the first buffer! */
4921 /* real setup is done in bindings.el */
4922 buffer_defaults
.mode_line_format
= build_string ("%-");
4923 buffer_defaults
.header_line_format
= Qnil
;
4924 buffer_defaults
.abbrev_mode
= Qnil
;
4925 buffer_defaults
.overwrite_mode
= Qnil
;
4926 buffer_defaults
.case_fold_search
= Qt
;
4927 buffer_defaults
.auto_fill_function
= Qnil
;
4928 buffer_defaults
.selective_display
= Qnil
;
4930 buffer_defaults
.selective_display_ellipses
= Qt
;
4932 buffer_defaults
.abbrev_table
= Qnil
;
4933 buffer_defaults
.display_table
= Qnil
;
4934 buffer_defaults
.undo_list
= Qnil
;
4935 buffer_defaults
.mark_active
= Qnil
;
4936 buffer_defaults
.file_format
= Qnil
;
4937 buffer_defaults
.overlays_before
= NULL
;
4938 buffer_defaults
.overlays_after
= NULL
;
4939 buffer_defaults
.overlay_center
= BEG
;
4941 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4942 buffer_defaults
.truncate_lines
= Qnil
;
4943 buffer_defaults
.ctl_arrow
= Qt
;
4944 buffer_defaults
.direction_reversed
= Qnil
;
4945 buffer_defaults
.cursor_type
= Qt
;
4946 buffer_defaults
.extra_line_spacing
= Qnil
;
4949 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4951 buffer_defaults
.enable_multibyte_characters
= Qt
;
4952 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4953 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4954 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4955 buffer_defaults
.cache_long_line_scans
= Qnil
;
4956 buffer_defaults
.file_truename
= Qnil
;
4957 XSETFASTINT (buffer_defaults
.display_count
, 0);
4958 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
4959 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
4960 buffer_defaults
.left_fringe_width
= Qnil
;
4961 buffer_defaults
.right_fringe_width
= Qnil
;
4962 buffer_defaults
.fringes_outside_margins
= Qnil
;
4963 buffer_defaults
.scroll_bar_width
= Qnil
;
4964 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
4965 buffer_defaults
.indicate_empty_lines
= Qnil
;
4966 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
4967 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4968 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4969 buffer_defaults
.display_time
= Qnil
;
4971 /* Assign the local-flags to the slots that have default values.
4972 The local flag is a bit that is used in the buffer
4973 to say that it has its own local value for the slot.
4974 The local flag bits are in the local_var_flags slot of the buffer. */
4976 /* Nothing can work if this isn't true */
4977 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4979 /* 0 means not a lisp var, -1 means always local, else mask */
4980 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4981 XSETINT (buffer_local_flags
.filename
, -1);
4982 XSETINT (buffer_local_flags
.directory
, -1);
4983 XSETINT (buffer_local_flags
.backed_up
, -1);
4984 XSETINT (buffer_local_flags
.save_length
, -1);
4985 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4986 XSETINT (buffer_local_flags
.read_only
, -1);
4987 XSETINT (buffer_local_flags
.major_mode
, -1);
4988 XSETINT (buffer_local_flags
.mode_name
, -1);
4989 XSETINT (buffer_local_flags
.undo_list
, -1);
4990 XSETINT (buffer_local_flags
.mark_active
, -1);
4991 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4992 XSETINT (buffer_local_flags
.file_truename
, -1);
4993 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4994 XSETINT (buffer_local_flags
.file_format
, -1);
4995 XSETINT (buffer_local_flags
.display_count
, -1);
4996 XSETINT (buffer_local_flags
.display_time
, -1);
4997 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5000 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5001 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5002 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5003 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5004 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5005 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5007 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5009 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5010 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5011 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5012 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5013 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5014 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5015 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5017 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5018 /* Make this one a permanent local. */
5019 buffer_permanent_local_flags
[idx
++] = 1;
5021 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5022 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5023 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5024 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5025 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5026 /* Make this one a permanent local. */
5027 buffer_permanent_local_flags
[idx
++] = 1;
5028 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5029 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5030 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5031 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5032 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5033 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5034 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5035 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5036 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5037 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5038 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5039 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5040 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5041 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5043 /* Need more room? */
5044 if (idx
>= MAX_PER_BUFFER_VARS
)
5046 last_per_buffer_idx
= idx
;
5048 Vbuffer_alist
= Qnil
;
5052 QSFundamental
= build_string ("Fundamental");
5054 Qfundamental_mode
= intern ("fundamental-mode");
5055 buffer_defaults
.major_mode
= Qfundamental_mode
;
5057 Qmode_class
= intern ("mode-class");
5059 Qprotected_field
= intern ("protected-field");
5061 Qpermanent_local
= intern ("permanent-local");
5063 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5064 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5066 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5068 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5070 /* super-magic invisible buffer */
5071 Vbuffer_alist
= Qnil
;
5073 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5075 inhibit_modification_hooks
= 0;
5081 char buf
[MAXPATHLEN
+ 1];
5083 struct stat dotstat
, pwdstat
;
5087 #ifdef USE_MMAP_FOR_BUFFERS
5089 /* When using the ralloc implementation based on mmap(2), buffer
5090 text pointers will have been set to null in the dumped Emacs.
5094 for (b
= all_buffers
; b
; b
= b
->next
)
5095 if (b
->text
->beg
== NULL
)
5096 enlarge_buffer_text (b
, 0);
5098 #endif /* USE_MMAP_FOR_BUFFERS */
5100 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5101 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5102 Fset_buffer_multibyte (Qnil
);
5104 /* If PWD is accurate, use it instead of calling getwd. PWD is
5105 sometimes a nicer name, and using it may avoid a fatal error if a
5106 parent directory is searchable but not readable. */
5107 if ((pwd
= getenv ("PWD")) != 0
5108 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5109 && stat (pwd
, &pwdstat
) == 0
5110 && stat (".", &dotstat
) == 0
5111 && dotstat
.st_ino
== pwdstat
.st_ino
5112 && dotstat
.st_dev
== pwdstat
.st_dev
5113 && strlen (pwd
) < MAXPATHLEN
)
5116 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5117 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5119 else if (getwd (buf
) == 0)
5120 fatal ("`getwd' failed: %s\n", buf
);
5124 /* Maybe this should really use some standard subroutine
5125 whose definition is filename syntax dependent. */
5127 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5129 buf
[rc
] = DIRECTORY_SEP
;
5132 #endif /* not VMS */
5134 current_buffer
->directory
= build_string (buf
);
5136 /* Add /: to the front of the name
5137 if it would otherwise be treated as magic. */
5138 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5140 /* If the default dir is just /, TEMP is non-nil
5141 because of the ange-ftp completion handler.
5142 However, it is not necessary to turn / into /:/.
5143 So avoid doing that. */
5144 && strcmp ("/", SDATA (current_buffer
->directory
)))
5145 current_buffer
->directory
5146 = concat2 (build_string ("/:"), current_buffer
->directory
);
5148 temp
= get_minibuffer (0);
5149 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5152 /* initialize the buffer routines */
5156 staticpro (&last_overlay_modification_hooks
);
5157 last_overlay_modification_hooks
5158 = Fmake_vector (make_number (10), Qnil
);
5160 staticpro (&Vbuffer_defaults
);
5161 staticpro (&Vbuffer_local_symbols
);
5162 staticpro (&Qfundamental_mode
);
5163 staticpro (&Qmode_class
);
5164 staticpro (&QSFundamental
);
5165 staticpro (&Vbuffer_alist
);
5166 staticpro (&Qprotected_field
);
5167 staticpro (&Qpermanent_local
);
5168 staticpro (&Qkill_buffer_hook
);
5169 Qoverlayp
= intern ("overlayp");
5170 staticpro (&Qoverlayp
);
5171 Qevaporate
= intern ("evaporate");
5172 staticpro (&Qevaporate
);
5173 Qmodification_hooks
= intern ("modification-hooks");
5174 staticpro (&Qmodification_hooks
);
5175 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5176 staticpro (&Qinsert_in_front_hooks
);
5177 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5178 staticpro (&Qinsert_behind_hooks
);
5179 Qget_file_buffer
= intern ("get-file-buffer");
5180 staticpro (&Qget_file_buffer
);
5181 Qpriority
= intern ("priority");
5182 staticpro (&Qpriority
);
5183 Qwindow
= intern ("window");
5184 staticpro (&Qwindow
);
5185 Qbefore_string
= intern ("before-string");
5186 staticpro (&Qbefore_string
);
5187 Qafter_string
= intern ("after-string");
5188 staticpro (&Qafter_string
);
5189 Qfirst_change_hook
= intern ("first-change-hook");
5190 staticpro (&Qfirst_change_hook
);
5191 Qbefore_change_functions
= intern ("before-change-functions");
5192 staticpro (&Qbefore_change_functions
);
5193 Qafter_change_functions
= intern ("after-change-functions");
5194 staticpro (&Qafter_change_functions
);
5195 staticpro (&Qucs_set_table_for_input
);
5197 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5198 staticpro (&Qkill_buffer_query_functions
);
5200 Fput (Qprotected_field
, Qerror_conditions
,
5201 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5202 Fput (Qprotected_field
, Qerror_message
,
5203 build_string ("Attempt to modify a protected field"));
5205 /* All these use DEFVAR_LISP_NOPRO because the slots in
5206 buffer_defaults will all be marked via Vbuffer_defaults. */
5208 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5209 &buffer_defaults
.mode_line_format
,
5210 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5211 This is the same as (default-value 'mode-line-format). */);
5213 DEFVAR_LISP_NOPRO ("default-header-line-format",
5214 &buffer_defaults
.header_line_format
,
5215 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5216 This is the same as (default-value 'header-line-format). */);
5218 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5219 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5220 This is the same as (default-value 'cursor-type). */);
5222 DEFVAR_LISP_NOPRO ("default-line-spacing",
5223 &buffer_defaults
.extra_line_spacing
,
5224 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5225 This is the same as (default-value 'line-spacing). */);
5227 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5228 &buffer_defaults
.abbrev_mode
,
5229 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5230 This is the same as (default-value 'abbrev-mode). */);
5232 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5233 &buffer_defaults
.ctl_arrow
,
5234 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5235 This is the same as (default-value 'ctl-arrow). */);
5237 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5238 &buffer_defaults
.direction_reversed
,
5239 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5240 This is the same as (default-value 'direction-reversed). */);
5242 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5243 &buffer_defaults
.enable_multibyte_characters
,
5244 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5245 This is the same as (default-value 'enable-multibyte-characters). */);
5247 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5248 &buffer_defaults
.buffer_file_coding_system
,
5249 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5250 This is the same as (default-value 'buffer-file-coding-system). */);
5252 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5253 &buffer_defaults
.truncate_lines
,
5254 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5255 This is the same as (default-value 'truncate-lines). */);
5257 DEFVAR_LISP_NOPRO ("default-fill-column",
5258 &buffer_defaults
.fill_column
,
5259 doc
: /* Default value of `fill-column' for buffers that do not override it.
5260 This is the same as (default-value 'fill-column). */);
5262 DEFVAR_LISP_NOPRO ("default-left-margin",
5263 &buffer_defaults
.left_margin
,
5264 doc
: /* Default value of `left-margin' for buffers that do not override it.
5265 This is the same as (default-value 'left-margin). */);
5267 DEFVAR_LISP_NOPRO ("default-tab-width",
5268 &buffer_defaults
.tab_width
,
5269 doc
: /* Default value of `tab-width' for buffers that do not override it.
5270 This is the same as (default-value 'tab-width). */);
5272 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5273 &buffer_defaults
.case_fold_search
,
5274 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5275 This is the same as (default-value 'case-fold-search). */);
5278 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5279 &buffer_defaults
.buffer_file_type
,
5280 doc
: /* Default file type for buffers that do not override it.
5281 This is the same as (default-value 'buffer-file-type).
5282 The file type is nil for text, t for binary. */);
5285 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5286 &buffer_defaults
.left_margin_cols
,
5287 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5288 This is the same as (default-value 'left-margin-width). */);
5290 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5291 &buffer_defaults
.right_margin_cols
,
5292 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5293 This is the same as (default-value 'right-margin-width). */);
5295 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5296 &buffer_defaults
.left_fringe_width
,
5297 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5298 This is the same as (default-value 'left-fringe-width). */);
5300 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5301 &buffer_defaults
.right_fringe_width
,
5302 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5303 This is the same as (default-value 'right-fringe-width). */);
5305 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5306 &buffer_defaults
.fringes_outside_margins
,
5307 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5308 This is the same as (default-value 'fringes-outside-margins). */);
5310 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5311 &buffer_defaults
.scroll_bar_width
,
5312 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5313 This is the same as (default-value 'scroll-bar-width). */);
5315 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5316 &buffer_defaults
.vertical_scroll_bar_type
,
5317 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5318 This is the same as (default-value 'vertical-scroll-bar). */);
5320 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5321 &buffer_defaults
.indicate_empty_lines
,
5322 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5323 This is the same as (default-value 'indicate-empty-lines). */);
5325 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5326 &buffer_defaults
.indicate_buffer_boundaries
,
5327 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5328 This is the same as (default-value 'indicate-buffer-boundaries). */);
5330 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5331 &buffer_defaults
.scroll_up_aggressively
,
5332 doc
: /* Default value of `scroll-up-aggressively'.
5333 This value applies in buffers that don't have their own local values.
5334 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5336 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5337 &buffer_defaults
.scroll_down_aggressively
,
5338 doc
: /* Default value of `scroll-down-aggressively'.
5339 This value applies in buffers that don't have their own local values.
5340 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5342 DEFVAR_PER_BUFFER ("header-line-format",
5343 ¤t_buffer
->header_line_format
,
5345 doc
: /* Analogous to `mode-line-format', but controls the header line.
5346 The header line appears, optionally, at the top of a window;
5347 the mode line appears at the bottom. */);
5349 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5351 doc
: /* Template for displaying mode line for current buffer.
5352 Each buffer has its own value of this variable.
5353 Value may be nil, a string, a symbol or a list or cons cell.
5354 A value of nil means don't display a mode line.
5355 For a symbol, its value is used (but it is ignored if t or nil).
5356 A string appearing directly as the value of a symbol is processed verbatim
5357 in that the %-constructs below are not recognized.
5358 Note that unless the symbol is marked as a `risky-local-variable', all
5359 properties in any strings, as well as all :eval and :propertize forms
5360 in the value of that symbol will be ignored.
5361 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5362 is used as a mode line element. Be careful--FORM should not load any files,
5363 because that can cause an infinite recursion.
5364 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5365 with the specified properties PROPS applied.
5366 For a list whose car is a symbol, the symbol's value is taken,
5367 and if that is non-nil, the cadr of the list is processed recursively.
5368 Otherwise, the caddr of the list (if there is one) is processed.
5369 For a list whose car is a string or list, each element is processed
5370 recursively and the results are effectively concatenated.
5371 For a list whose car is an integer, the cdr of the list is processed
5372 and padded (if the number is positive) or truncated (if negative)
5373 to the width specified by that number.
5374 A string is printed verbatim in the mode line except for %-constructs:
5375 (%-constructs are allowed when the string is the entire mode-line-format
5376 or when it is found in a cons-cell or a list)
5377 %b -- print buffer name. %f -- print visited file name.
5378 %F -- print frame name.
5379 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5380 %& is like %*, but ignore read-only-ness.
5381 % means buffer is read-only and * means it is modified.
5382 For a modified read-only buffer, %* gives % and %+ gives *.
5383 %s -- print process status. %l -- print the current line number.
5384 %c -- print the current column number (this makes editing slower).
5385 To make the column number update correctly in all cases,
5386 `column-number-mode' must be non-nil.
5387 %i -- print the size of the buffer.
5388 %I -- like %i, but use k, M, G, etc., to abbreviate.
5389 %p -- print percent of buffer above top of window, or Top, Bot or All.
5390 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5391 or print Bottom or All.
5392 %m -- print the mode name.
5393 %n -- print Narrow if appropriate.
5394 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5395 %Z -- like %z, but including the end-of-line format.
5396 %[ -- print one [ for each recursive editing level. %] similar.
5397 %% -- print %. %- -- print infinitely many dashes.
5398 Decimal digits after the % specify field width to which to pad. */);
5400 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5401 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5402 nil here means use current buffer's major mode. */);
5404 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5405 make_number (Lisp_Symbol
),
5406 doc
: /* Symbol for current buffer's major mode. */);
5408 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5410 doc
: /* Pretty name of current buffer's major mode (a string). */);
5412 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5413 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5415 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5417 doc
: /* *Non-nil if searches and matches should ignore case. */);
5419 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5420 make_number (Lisp_Int
),
5421 doc
: /* *Column beyond which automatic line-wrapping should happen.
5422 Interactively, you can set this using \\[set-fill-column]. */);
5424 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5425 make_number (Lisp_Int
),
5426 doc
: /* *Column for the default indent-line-function to indent to.
5427 Linefeed indents to this column in Fundamental mode. */);
5429 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5430 make_number (Lisp_Int
),
5431 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5433 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5434 doc
: /* *Non-nil means display control chars with uparrow.
5435 A value of nil means use backslash and octal digits.
5436 This variable does not apply to characters whose display is specified
5437 in the current display table (if there is one). */);
5439 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5440 ¤t_buffer
->enable_multibyte_characters
,
5442 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5443 Otherwise they are regarded as unibyte. This affects the display,
5444 file I/O and the behavior of various editing commands.
5446 This variable is buffer-local but you cannot set it directly;
5447 use the function `set-buffer-multibyte' to change a buffer's representation.
5448 Changing its default value with `setq-default' is supported.
5449 See also variable `default-enable-multibyte-characters' and Info node
5450 `(elisp)Text Representations'. */);
5451 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5453 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5454 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5455 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5456 This variable applies to saving the buffer, and also to `write-region'
5457 and other functions that use `write-region'.
5458 It does not apply to sending output to subprocesses, however.
5460 If this is nil, the buffer is saved without any code conversion
5461 unless some coding system is specified in `file-coding-system-alist'
5462 for the buffer file.
5464 If the text to be saved cannot be encoded as specified by this variable,
5465 an alternative encoding is selected by `select-safe-coding-system', which see.
5467 The variable `coding-system-for-write', if non-nil, overrides this variable.
5469 This variable is never applied to a way of decoding a file while reading it. */);
5471 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5473 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5475 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5476 doc
: /* *Non-nil means do not display continuation lines.
5477 Instead, give each line of text just one screen line.
5479 Note that this is overridden by the variable
5480 `truncate-partial-width-windows' if that variable is non-nil
5481 and this buffer is not full-frame width. */);
5484 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5486 doc
: /* Non-nil if the visited file is a binary file.
5487 This variable is meaningful on MS-DOG and Windows NT.
5488 On those systems, it is automatically local in every buffer.
5489 On other systems, this variable is normally always nil. */);
5492 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5493 make_number (Lisp_String
),
5494 doc
: /* Name of default directory of current buffer. Should end with slash.
5495 To interactively change the default directory, use command `cd'. */);
5497 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5499 doc
: /* Function called (if non-nil) to perform auto-fill.
5500 It is called after self-inserting any character specified in
5501 the `auto-fill-chars' table.
5502 NOTE: This variable is not a hook;
5503 its value may not be a list of functions. */);
5505 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5506 make_number (Lisp_String
),
5507 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5509 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5510 make_number (Lisp_String
),
5511 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5512 The truename of a file is calculated by `file-truename'
5513 and then abbreviated with `abbreviate-file-name'. */);
5515 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5516 ¤t_buffer
->auto_save_file_name
,
5517 make_number (Lisp_String
),
5518 doc
: /* Name of file for auto-saving current buffer.
5519 If it is nil, that means don't auto-save this buffer. */);
5521 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5522 doc
: /* Non-nil if this buffer is read-only. */);
5524 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5525 doc
: /* Non-nil if this buffer's file has been backed up.
5526 Backing up is done before the first time the file is saved. */);
5528 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5529 make_number (Lisp_Int
),
5530 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5533 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5535 doc
: /* Non-nil enables selective display.
5536 An Integer N as value means display only lines
5537 that start with less than n columns of space.
5538 A value of t means that the character ^M makes itself and
5539 all the rest of the line invisible; also, when saving the buffer
5540 in a file, save the ^M as a newline. */);
5543 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5544 ¤t_buffer
->selective_display_ellipses
,
5546 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5549 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5550 doc
: /* Non-nil if self-insertion should replace existing text.
5551 The value should be one of `overwrite-mode-textual',
5552 `overwrite-mode-binary', or nil.
5553 If it is `overwrite-mode-textual', self-insertion still
5554 inserts at the end of a line, and inserts when point is before a tab,
5555 until the tab is filled in.
5556 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5558 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5560 doc
: /* Display table that controls display of the contents of current buffer.
5562 If this variable is nil, the value of `standard-display-table' is used.
5563 Each window can have its own, overriding display table, see
5564 `set-window-display-table' and `window-display-table'.
5566 The display table is a char-table created with `make-display-table'.
5567 A char-table is an array indexed by character codes. Normal array
5568 primitives `aref' and `aset' can be used to access elements of a char-table.
5570 Each of the char-table elements control how to display the corresponding
5571 text character: the element at index C in the table says how to display
5572 the character whose code is C. Each element should be a vector of
5573 characters or nil. nil means display the character in the default fashion;
5574 otherwise, the characters from the vector are delivered to the screen
5575 instead of the original character.
5577 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5578 a capital Y instead of each X character.
5580 In addition, a char-table has six extra slots to control the display of:
5582 the end of a truncated screen line (extra-slot 0, a single character);
5583 the end of a continued line (extra-slot 1, a single character);
5584 the escape character used to display character codes in octal
5585 (extra-slot 2, a single character);
5586 the character used as an arrow for control characters (extra-slot 3,
5587 a single character);
5588 the decoration indicating the presence of invisible lines (extra-slot 4,
5589 a vector of characters);
5590 the character used to draw the border between side-by-side windows
5591 (extra-slot 5, a single character).
5593 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5595 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5597 doc
: /* *Width of left marginal area for display of a buffer.
5598 A value of nil means no marginal area. */);
5600 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5602 doc
: /* *Width of right marginal area for display of a buffer.
5603 A value of nil means no marginal area. */);
5605 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5607 doc
: /* *Width of this buffer's left fringe (in pixels).
5608 A value of 0 means no left fringe is shown in this buffer's window.
5609 A value of nil means to use the left fringe width from the window's frame. */);
5611 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5613 doc
: /* *Width of this buffer's right fringe (in pixels).
5614 A value of 0 means no right fringe is shown in this buffer's window.
5615 A value of nil means to use the right fringe width from the window's frame. */);
5617 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5619 doc
: /* *Non-nil means to display fringes outside display margins.
5620 A value of nil means to display fringes between margins and buffer text. */);
5622 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5624 doc
: /* *Width of this buffer's scroll bars in pixels.
5625 A value of nil means to use the scroll bar width from the window's frame. */);
5627 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5629 doc
: /* *Position of this buffer's vertical scroll bar.
5630 A value of left or right means to place the vertical scroll bar at that side
5631 of the window; a value of nil means that this window has no vertical scroll bar.
5632 A value of t means to use the vertical scroll bar type from the window's frame. */);
5634 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5635 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5636 doc
: /* *Visually indicate empty lines after the buffer end.
5637 If non-nil, a bitmap is displayed in the left fringe of a window on
5638 window-systems. */);
5640 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5641 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5642 doc
: /* *Visually indicate buffer boundaries and scrolling.
5643 If non-nil, the first and last line of the buffer are marked in the fringe
5644 of a window on window-systems with angle bitmaps, or if the window can be
5645 scrolled, the top and bottom line of the window are marked with up and down
5647 If value is `left' or `right', both angle and arrow bitmaps are displayed in
5648 the left or right fringe, resp. Any other non-nil value causes the
5649 bitmap on the top line to be displayed in the left fringe, and the
5650 bitmap on the bottom line in the right fringe.
5651 If value is a cons (ANGLES . ARROWS), the car specifies the position
5652 of the angle bitmaps, and the cdr specifies the position of the arrow
5653 bitmaps. For example, (t . right) places the top angle bitmap in left
5654 fringe, the bottom angle bitmap in right fringe, and both arrow
5655 bitmaps in right fringe. To show just the angle bitmaps in the left
5656 fringe, but no arrow bitmaps, use (left . nil). */);
5658 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5659 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5660 doc
: /* How far to scroll windows upward.
5661 If you move point off the bottom, the window scrolls automatically.
5662 This variable controls how far it scrolls. nil, the default,
5663 means scroll to center point. A fraction means scroll to put point
5664 that fraction of the window's height from the bottom of the window.
5665 When the value is 0.0, point goes at the bottom line, which in the simple
5666 case that you moved off with C-f means scrolling just one line. 1.0 means
5667 point goes at the top, so that in that simple case, the window
5668 window scrolls by a full window height. Meaningful values are
5669 between 0.0 and 1.0, inclusive. */);
5671 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5672 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5673 doc
: /* How far to scroll windows downward.
5674 If you move point off the top, the window scrolls automatically.
5675 This variable controls how far it scrolls. nil, the default,
5676 means scroll to center point. A fraction means scroll to put point
5677 that fraction of the window's height from the top of the window.
5678 When the value is 0.0, point goes at the top line, which in the simple
5679 case that you moved off with C-b means scrolling just one line. 1.0 means
5680 point goes at the bottom, so that in that simple case, the window
5681 window scrolls by a full window height. Meaningful values are
5682 between 0.0 and 1.0, inclusive. */);
5684 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5688 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5689 doc
: /* List of functions to call before each text change.
5690 Two arguments are passed to each function: the positions of
5691 the beginning and end of the range of old text to be changed.
5692 \(For an insertion, the beginning and end are at the same place.)
5693 No information is given about the length of the text after the change.
5695 Buffer changes made while executing the `before-change-functions'
5696 don't call any before-change or after-change functions.
5697 That's because these variables are temporarily set to nil.
5698 As a result, a hook function cannot straightforwardly alter the value of
5699 these variables. See the Emacs Lisp manual for a way of
5700 accomplishing an equivalent result by using other variables.
5702 If an unhandled error happens in running these functions,
5703 the variable's value remains nil. That prevents the error
5704 from happening repeatedly and making Emacs nonfunctional. */);
5705 Vbefore_change_functions
= Qnil
;
5707 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5708 doc
: /* List of functions to call after each text change.
5709 Three arguments are passed to each function: the positions of
5710 the beginning and end of the range of changed text,
5711 and the length in bytes of the pre-change text replaced by that range.
5712 \(For an insertion, the pre-change length is zero;
5713 for a deletion, that length is the number of bytes deleted,
5714 and the post-change beginning and end are at the same place.)
5716 Buffer changes made while executing the `after-change-functions'
5717 don't call any before-change or after-change functions.
5718 That's because these variables are temporarily set to nil.
5719 As a result, a hook function cannot straightforwardly alter the value of
5720 these variables. See the Emacs Lisp manual for a way of
5721 accomplishing an equivalent result by using other variables.
5723 If an unhandled error happens in running these functions,
5724 the variable's value remains nil. That prevents the error
5725 from happening repeatedly and making Emacs nonfunctional. */);
5726 Vafter_change_functions
= Qnil
;
5728 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5729 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5730 The functions are run using the `run-hooks' function. */);
5731 Vfirst_change_hook
= Qnil
;
5733 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5734 doc
: /* List of undo entries in current buffer.
5735 Recent changes come first; older changes follow newer.
5737 An entry (BEG . END) represents an insertion which begins at
5738 position BEG and ends at position END.
5740 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5741 from (abs POSITION). If POSITION is positive, point was at the front
5742 of the text being deleted; if negative, point was at the end.
5744 An entry (t HIGH . LOW) indicates that the buffer previously had
5745 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5746 of the visited file's modification time, as of that time. If the
5747 modification time of the most recent save is different, this entry is
5750 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5751 was modified between BEG and END. PROPERTY is the property name,
5752 and VALUE is the old value.
5754 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5755 was adjusted in position by the offset DISTANCE (an integer).
5757 An entry of the form POSITION indicates that point was at the buffer
5758 location given by the integer. Undoing an entry of this form places
5761 nil marks undo boundaries. The undo command treats the changes
5762 between two undo boundaries as a single step to be undone.
5764 If the value of the variable is t, undo information is not recorded. */);
5766 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5767 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5769 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5770 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5772 Normally, the line-motion functions work by scanning the buffer for
5773 newlines. Columnar operations (like move-to-column and
5774 compute-motion) also work by scanning the buffer, summing character
5775 widths as they go. This works well for ordinary text, but if the
5776 buffer's lines are very long (say, more than 500 characters), these
5777 motion functions will take longer to execute. Emacs may also take
5778 longer to update the display.
5780 If cache-long-line-scans is non-nil, these motion functions cache the
5781 results of their scans, and consult the cache to avoid rescanning
5782 regions of the buffer until the text is modified. The caches are most
5783 beneficial when they prevent the most searching---that is, when the
5784 buffer contains long lines and large regions of characters with the
5785 same, fixed screen width.
5787 When cache-long-line-scans is non-nil, processing short lines will
5788 become slightly slower (because of the overhead of consulting the
5789 cache), and the caches will use memory roughly proportional to the
5790 number of newlines and characters whose screen width varies.
5792 The caches require no explicit maintenance; their accuracy is
5793 maintained internally by the Emacs primitives. Enabling or disabling
5794 the cache should not affect the behavior of any of the motion
5795 functions; it should only affect their performance. */);
5797 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5798 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5800 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5801 doc
: /* List of formats to use when saving this buffer.
5802 Formats are defined by `format-alist'. This variable is
5803 set when a file is visited. */);
5805 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5806 ¤t_buffer
->invisibility_spec
, Qnil
,
5807 doc
: /* Invisibility spec of this buffer.
5808 The default is t, which means that text is invisible
5809 if it has a non-nil `invisible' property.
5810 If the value is a list, a text character is invisible if its `invisible'
5811 property is an element in that list.
5812 If an element is a cons cell of the form (PROP . ELLIPSIS),
5813 then characters with property value PROP are invisible,
5814 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5816 DEFVAR_PER_BUFFER ("buffer-display-count",
5817 ¤t_buffer
->display_count
, Qnil
,
5818 doc
: /* A number incremented each time this buffer is displayed in a window.
5819 The function `set-window-buffer' increments it. */);
5821 DEFVAR_PER_BUFFER ("buffer-display-time",
5822 ¤t_buffer
->display_time
, Qnil
,
5823 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5824 The function `set-window-buffer' updates this variable
5825 to the value obtained by calling `current-time'.
5826 If the buffer has never been shown in a window, the value is nil. */);
5828 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5829 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5830 Non-nil also enables highlighting of the region whenever the mark is active.
5831 The variable `highlight-nonselected-windows' controls whether to highlight
5832 all windows or just the selected window. */);
5833 Vtransient_mark_mode
= Qnil
;
5835 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5836 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5837 If the value is t, disregard `buffer-read-only' and all `read-only'
5838 text properties. If the value is a list, disregard `buffer-read-only'
5839 and disregard a `read-only' text property if the property value
5840 is a member of the list. */);
5841 Vinhibit_read_only
= Qnil
;
5843 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5844 doc
: /* Cursor to use when this buffer is in the selected window.
5845 Values are interpreted as follows:
5847 t use the cursor specified for the frame
5848 nil don't display a cursor
5849 bar display a bar cursor with default width
5850 (bar . WIDTH) display a bar cursor with width WIDTH
5851 ANYTHING ELSE display a box cursor.
5853 When the buffer is displayed in a nonselected window,
5854 this variable has no effect; the cursor appears as a hollow box. */);
5856 DEFVAR_PER_BUFFER ("line-spacing",
5857 ¤t_buffer
->extra_line_spacing
, Qnil
,
5858 doc
: /* Additional space to put between lines when displaying a buffer.
5859 The space is measured in pixels, and put below lines on window systems. */);
5861 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5862 doc
: /* List of functions called with no args to query before killing a buffer. */);
5863 Vkill_buffer_query_functions
= Qnil
;
5865 defsubr (&Sbuffer_live_p
);
5866 defsubr (&Sbuffer_list
);
5867 defsubr (&Sget_buffer
);
5868 defsubr (&Sget_file_buffer
);
5869 defsubr (&Sget_buffer_create
);
5870 defsubr (&Smake_indirect_buffer
);
5871 defsubr (&Sgenerate_new_buffer_name
);
5872 defsubr (&Sbuffer_name
);
5873 /*defsubr (&Sbuffer_number);*/
5874 defsubr (&Sbuffer_file_name
);
5875 defsubr (&Sbuffer_base_buffer
);
5876 defsubr (&Sbuffer_local_value
);
5877 defsubr (&Sbuffer_local_variables
);
5878 defsubr (&Sbuffer_modified_p
);
5879 defsubr (&Sset_buffer_modified_p
);
5880 defsubr (&Sbuffer_modified_tick
);
5881 defsubr (&Srename_buffer
);
5882 defsubr (&Sother_buffer
);
5883 defsubr (&Sbuffer_disable_undo
);
5884 defsubr (&Sbuffer_enable_undo
);
5885 defsubr (&Skill_buffer
);
5886 defsubr (&Sset_buffer_major_mode
);
5887 defsubr (&Sswitch_to_buffer
);
5888 defsubr (&Spop_to_buffer
);
5889 defsubr (&Scurrent_buffer
);
5890 defsubr (&Sset_buffer
);
5891 defsubr (&Sbarf_if_buffer_read_only
);
5892 defsubr (&Sbury_buffer
);
5893 defsubr (&Serase_buffer
);
5894 defsubr (&Sset_buffer_multibyte
);
5895 defsubr (&Skill_all_local_variables
);
5897 defsubr (&Soverlayp
);
5898 defsubr (&Smake_overlay
);
5899 defsubr (&Sdelete_overlay
);
5900 defsubr (&Smove_overlay
);
5901 defsubr (&Soverlay_start
);
5902 defsubr (&Soverlay_end
);
5903 defsubr (&Soverlay_buffer
);
5904 defsubr (&Soverlay_properties
);
5905 defsubr (&Soverlays_at
);
5906 defsubr (&Soverlays_in
);
5907 defsubr (&Snext_overlay_change
);
5908 defsubr (&Sprevious_overlay_change
);
5909 defsubr (&Soverlay_recenter
);
5910 defsubr (&Soverlay_lists
);
5911 defsubr (&Soverlay_get
);
5912 defsubr (&Soverlay_put
);
5913 defsubr (&Srestore_buffer_modified_p
);
5919 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5920 initial_define_key (control_x_map
, 'k', "kill-buffer");
5922 /* This must not be in syms_of_buffer, because Qdisabled is not
5923 initialized when that function gets called. */
5924 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
5927 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
5928 (do not change this comment) */