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"
48 #include "character.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
));
186 extern char * emacs_strerror
P_ ((int));
188 /* For debugging; temporary. See set_buffer_internal. */
189 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
196 error ("No buffer named %s", SDATA (spec
));
197 error ("Invalid buffer argument");
200 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
201 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
202 Value is nil if OBJECT is not a buffer or if it has been killed. */)
206 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
210 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
211 doc
: /* Return a list of all existing live buffers.
212 If the optional arg FRAME is a frame, we return the buffer list
213 in the proper order for that frame: the buffers in FRAME's `buffer-list'
214 frame parameter come first, followed by the rest of the buffers. */)
218 Lisp_Object framelist
, general
;
219 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
227 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
229 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
231 while (! NILP (tail
))
233 general
= Fdelq (XCAR (tail
), general
);
236 return nconc2 (framelist
, general
);
242 /* Like Fassoc, but use Fstring_equal to compare
243 (which ignores text properties),
244 and don't ever QUIT. */
247 assoc_ignore_text_properties (key
, list
)
248 register Lisp_Object key
;
251 register Lisp_Object tail
;
252 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
254 register Lisp_Object elt
, tem
;
256 tem
= Fstring_equal (Fcar (elt
), key
);
263 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
264 doc
: /* Return the buffer named NAME (a string).
265 If there is no live buffer named NAME, return nil.
266 NAME may also be a buffer; if so, the value is that buffer. */)
268 register Lisp_Object name
;
274 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
277 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
278 doc
: /* Return the buffer visiting file FILENAME (a string).
279 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
280 If there is no such live buffer, return nil.
281 See also `find-buffer-visiting'. */)
283 register Lisp_Object filename
;
285 register Lisp_Object tail
, buf
, tem
;
288 CHECK_STRING (filename
);
289 filename
= Fexpand_file_name (filename
, Qnil
);
291 /* If the file name has special constructs in it,
292 call the corresponding file handler. */
293 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
295 return call2 (handler
, Qget_file_buffer
, filename
);
297 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
299 buf
= Fcdr (XCAR (tail
));
300 if (!BUFFERP (buf
)) continue;
301 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
302 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
310 get_truename_buffer (filename
)
311 register Lisp_Object filename
;
313 register Lisp_Object tail
, buf
, tem
;
315 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
317 buf
= Fcdr (XCAR (tail
));
318 if (!BUFFERP (buf
)) continue;
319 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
320 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
327 /* Incremented for each buffer created, to assign the buffer number. */
330 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
331 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
332 A new buffer is created if there is no live buffer named NAME.
333 If NAME starts with a space, the new buffer does not keep undo information.
334 If NAME is a buffer instead of a string, then it is the value returned.
335 The value is never nil. */)
337 register Lisp_Object name
;
339 register Lisp_Object buf
;
340 register struct buffer
*b
;
342 buf
= Fget_buffer (name
);
346 if (SCHARS (name
) == 0)
347 error ("Empty string for buffer name is not allowed");
349 b
= (struct buffer
*) allocate_buffer ();
351 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
353 /* An ordinary buffer uses its own struct buffer_text. */
354 b
->text
= &b
->own_text
;
357 BUF_GAP_SIZE (b
) = 20;
359 /* We allocate extra 1-byte at the tail and keep it always '\0' for
360 anchoring a search. */
361 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
363 if (! BUF_BEG_ADDR (b
))
364 buffer_memory_full ();
371 BUF_PT_BYTE (b
) = BEG_BYTE
;
372 BUF_GPT_BYTE (b
) = BEG_BYTE
;
373 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
374 BUF_ZV_BYTE (b
) = BEG_BYTE
;
375 BUF_Z_BYTE (b
) = BEG_BYTE
;
377 BUF_OVERLAY_MODIFF (b
) = 1;
378 BUF_SAVE_MODIFF (b
) = 1;
379 BUF_INTERVALS (b
) = 0;
380 BUF_UNCHANGED_MODIFIED (b
) = 1;
381 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
382 BUF_END_UNCHANGED (b
) = 0;
383 BUF_BEG_UNCHANGED (b
) = 0;
384 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
386 b
->newline_cache
= 0;
387 b
->width_run_cache
= 0;
388 b
->width_table
= Qnil
;
389 b
->prevent_redisplay_optimizations_p
= 1;
391 /* Put this on the chain of all buffers including killed ones. */
392 b
->next
= all_buffers
;
395 /* An ordinary buffer normally doesn't need markers
396 to handle BEGV and ZV. */
398 b
->begv_marker
= Qnil
;
401 name
= Fcopy_sequence (name
);
402 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
405 if (SREF (name
, 0) != ' ')
411 reset_buffer_local_variables (b
, 1);
413 b
->mark
= Fmake_marker ();
414 BUF_MARKERS (b
) = NULL
;
417 /* Put this in the alist of all live buffers. */
419 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
421 /* An error in calling the function here (should someone redfine it)
422 can lead to infinite regress until you run out of stack. rms
423 says that's not worth protecting against. */
424 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
425 /* buf is on buffer-alist, so no gcpro. */
426 call1 (Qucs_set_table_for_input
, buf
);
432 /* Return a list of overlays which is a copy of the overlay list
433 LIST, but for buffer B. */
435 static struct Lisp_Overlay
*
436 copy_overlays (b
, list
)
438 struct Lisp_Overlay
*list
;
441 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
443 XSETBUFFER (buffer
, b
);
445 for (; list
; list
= list
->next
)
447 Lisp_Object overlay
, start
, end
, old_overlay
;
450 XSETMISC (old_overlay
, list
);
451 charpos
= marker_position (OVERLAY_START (old_overlay
));
452 start
= Fmake_marker ();
453 Fset_marker (start
, make_number (charpos
), buffer
);
454 XMARKER (start
)->insertion_type
455 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
457 charpos
= marker_position (OVERLAY_END (old_overlay
));
458 end
= Fmake_marker ();
459 Fset_marker (end
, make_number (charpos
), buffer
);
460 XMARKER (end
)->insertion_type
461 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
463 overlay
= allocate_misc ();
464 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
465 OVERLAY_START (overlay
) = start
;
466 OVERLAY_END (overlay
) = end
;
467 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
468 XOVERLAY (overlay
)->next
= NULL
;
471 tail
= tail
->next
= XOVERLAY (overlay
);
473 result
= tail
= XOVERLAY (overlay
);
480 /* Clone per-buffer values of buffer FROM.
482 Buffer TO gets the same per-buffer values as FROM, with the
483 following exceptions: (1) TO's name is left untouched, (2) markers
484 are copied and made to refer to TO, and (3) overlay lists are
488 clone_per_buffer_values (from
, to
)
489 struct buffer
*from
, *to
;
491 Lisp_Object to_buffer
, tem
;
494 XSETBUFFER (to_buffer
, to
);
496 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
498 offset
+= sizeof (Lisp_Object
))
502 obj
= PER_BUFFER_VALUE (from
, offset
);
505 struct Lisp_Marker
*m
= XMARKER (obj
);
506 obj
= Fmake_marker ();
507 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
508 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
511 PER_BUFFER_VALUE (to
, offset
) = obj
;
514 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
516 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
517 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
519 /* Copy the alist of local variables,
520 and all the alist elements too. */
522 = Fcopy_sequence (from
->local_var_alist
);
523 for (tem
= to
->local_var_alist
; CONSP (tem
);
525 XSETCAR (tem
, Fcons (XCAR (XCAR (tem
)), XCDR (XCAR (tem
))));
529 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
531 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
532 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
533 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
534 NAME should be a string which is not the name of an existing buffer.
535 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
536 such as major and minor modes, in the indirect buffer.
537 CLONE nil means the indirect buffer's state is reset to default values. */)
538 (base_buffer
, name
, clone
)
539 Lisp_Object base_buffer
, name
, clone
;
541 Lisp_Object buf
, tem
;
545 buf
= Fget_buffer (name
);
547 error ("Buffer name `%s' is in use", SDATA (name
));
550 base_buffer
= Fget_buffer (base_buffer
);
551 if (NILP (base_buffer
))
552 error ("No such buffer: `%s'", SDATA (tem
));
553 if (NILP (XBUFFER (base_buffer
)->name
))
554 error ("Base buffer has been killed");
556 if (SCHARS (name
) == 0)
557 error ("Empty string for buffer name is not allowed");
559 b
= (struct buffer
*) allocate_buffer ();
560 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
562 if (XBUFFER (base_buffer
)->base_buffer
)
563 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
565 b
->base_buffer
= XBUFFER (base_buffer
);
567 /* Use the base buffer's text object. */
568 b
->text
= b
->base_buffer
->text
;
570 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
571 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
572 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
573 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
574 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
575 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
577 b
->newline_cache
= 0;
578 b
->width_run_cache
= 0;
579 b
->width_table
= Qnil
;
581 /* Put this on the chain of all buffers including killed ones. */
582 b
->next
= all_buffers
;
585 name
= Fcopy_sequence (name
);
586 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
590 reset_buffer_local_variables (b
, 1);
592 /* Put this in the alist of all live buffers. */
594 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
596 b
->mark
= Fmake_marker ();
599 /* The multibyte status belongs to the base buffer. */
600 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
602 /* Make sure the base buffer has markers for its narrowing. */
603 if (NILP (b
->base_buffer
->pt_marker
))
605 b
->base_buffer
->pt_marker
= Fmake_marker ();
606 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
607 BUF_PT (b
->base_buffer
),
608 BUF_PT_BYTE (b
->base_buffer
));
610 if (NILP (b
->base_buffer
->begv_marker
))
612 b
->base_buffer
->begv_marker
= Fmake_marker ();
613 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
614 BUF_BEGV (b
->base_buffer
),
615 BUF_BEGV_BYTE (b
->base_buffer
));
617 if (NILP (b
->base_buffer
->zv_marker
))
619 b
->base_buffer
->zv_marker
= Fmake_marker ();
620 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
621 BUF_ZV (b
->base_buffer
),
622 BUF_ZV_BYTE (b
->base_buffer
));
623 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
628 /* Give the indirect buffer markers for its narrowing. */
629 b
->pt_marker
= Fmake_marker ();
630 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
631 b
->begv_marker
= Fmake_marker ();
632 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
633 b
->zv_marker
= Fmake_marker ();
634 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
635 XMARKER (b
->zv_marker
)->insertion_type
= 1;
638 clone_per_buffer_values (b
->base_buffer
, b
);
644 delete_all_overlays (b
)
649 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
650 have to empty the list, otherwise we end up with overlays that
651 think they belong to this buffer while the buffer doesn't know about
653 while (b
->overlays_before
)
655 XSETMISC (overlay
, b
->overlays_before
);
656 Fdelete_overlay (overlay
);
658 while (b
->overlays_after
)
660 XSETMISC (overlay
, b
->overlays_after
);
661 Fdelete_overlay (overlay
);
663 eassert (b
->overlays_before
== NULL
);
664 eassert (b
->overlays_after
== NULL
);
667 /* Reinitialize everything about a buffer except its name and contents
669 If called on an already-initialized buffer, the list of overlays
670 should be deleted before calling this function, otherwise we end up
671 with overlays that claim to belong to the buffer but the buffer
672 claims it doesn't belong to it. */
676 register struct buffer
*b
;
679 b
->file_truename
= Qnil
;
680 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
682 XSETFASTINT (b
->save_length
, 0);
683 b
->last_window_start
= 1;
684 /* It is more conservative to start out "changed" than "unchanged". */
686 b
->prevent_redisplay_optimizations_p
= 1;
688 b
->auto_save_modified
= 0;
689 b
->auto_save_failure_time
= -1;
690 b
->auto_save_file_name
= Qnil
;
692 b
->overlays_before
= NULL
;
693 b
->overlays_after
= NULL
;
694 b
->overlay_center
= BEG
;
695 b
->mark_active
= Qnil
;
696 b
->point_before_scroll
= Qnil
;
697 b
->file_format
= Qnil
;
698 b
->auto_save_file_format
= Qt
;
699 b
->last_selected_window
= Qnil
;
700 XSETINT (b
->display_count
, 0);
701 b
->display_time
= Qnil
;
702 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
703 b
->cursor_type
= buffer_defaults
.cursor_type
;
704 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
706 b
->display_error_modiff
= 0;
709 /* Reset buffer B's local variables info.
710 Don't use this on a buffer that has already been in use;
711 it does not treat permanent locals consistently.
712 Instead, use Fkill_all_local_variables.
714 If PERMANENT_TOO is 1, then we reset permanent built-in
715 buffer-local variables. If PERMANENT_TOO is 0,
716 we preserve those. */
719 reset_buffer_local_variables (b
, permanent_too
)
720 register struct buffer
*b
;
726 /* Reset the major mode to Fundamental, together with all the
727 things that depend on the major mode.
728 default-major-mode is handled at a higher level.
729 We ignore it here. */
730 b
->major_mode
= Qfundamental_mode
;
732 b
->mode_name
= QSFundamental
;
733 b
->minor_modes
= Qnil
;
735 /* If the standard case table has been altered and invalidated,
736 fix up its insides first. */
737 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
738 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
739 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
740 Fset_standard_case_table (Vascii_downcase_table
);
742 b
->downcase_table
= Vascii_downcase_table
;
743 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
744 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
745 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
746 b
->invisibility_spec
= Qt
;
748 b
->buffer_file_type
= Qnil
;
751 /* Reset all (or most) per-buffer variables to their defaults. */
752 b
->local_var_alist
= Qnil
;
753 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
754 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
755 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
757 /* For each slot that has a default value,
758 copy that into the slot. */
760 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
762 offset
+= sizeof (Lisp_Object
))
764 int idx
= PER_BUFFER_IDX (offset
);
767 || buffer_permanent_local_flags
[idx
] == 0))
768 /* Is -2 used anywhere? */
770 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
774 /* We split this away from generate-new-buffer, because rename-buffer
775 and set-visited-file-name ought to be able to use this to really
776 rename the buffer properly. */
778 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
780 doc
: /* Return a string that is the name of no existing buffer based on NAME.
781 If there is no live buffer named NAME, then return NAME.
782 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
783 \(starting at 2) until an unused name is found, and then return that name.
784 Optional second argument IGNORE specifies a name that is okay to use
785 \(if it is in the sequence to be tried)
786 even if a buffer with that name exists. */)
788 register Lisp_Object name
, ignore
;
790 register Lisp_Object gentemp
, tem
;
796 tem
= Fstring_equal (name
, ignore
);
799 tem
= Fget_buffer (name
);
806 sprintf (number
, "<%d>", ++count
);
807 gentemp
= concat2 (name
, build_string (number
));
808 tem
= Fstring_equal (gentemp
, ignore
);
811 tem
= Fget_buffer (gentemp
);
818 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
819 doc
: /* Return the name of BUFFER, as a string.
820 With no argument or nil as argument, return the name of the current buffer. */)
822 register Lisp_Object buffer
;
825 return current_buffer
->name
;
826 CHECK_BUFFER (buffer
);
827 return XBUFFER (buffer
)->name
;
830 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
831 doc
: /* Return name of file BUFFER is visiting, or nil if none.
832 No argument or nil as argument means use the current buffer. */)
834 register Lisp_Object buffer
;
837 return current_buffer
->filename
;
838 CHECK_BUFFER (buffer
);
839 return XBUFFER (buffer
)->filename
;
842 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
844 doc
: /* Return the base buffer of indirect buffer BUFFER.
845 If BUFFER is not indirect, return nil.
846 BUFFER defaults to the current buffer. */)
848 register Lisp_Object buffer
;
851 Lisp_Object base_buffer
;
854 base
= current_buffer
->base_buffer
;
857 CHECK_BUFFER (buffer
);
858 base
= XBUFFER (buffer
)->base_buffer
;
863 XSETBUFFER (base_buffer
, base
);
867 DEFUN ("buffer-local-value", Fbuffer_local_value
,
868 Sbuffer_local_value
, 2, 2, 0,
869 doc
: /* Return the value of VARIABLE in BUFFER.
870 If VARIABLE does not have a buffer-local binding in BUFFER, the value
871 is the default binding of variable. */)
873 register Lisp_Object symbol
;
874 register Lisp_Object buffer
;
876 register struct buffer
*buf
;
877 register Lisp_Object result
;
879 CHECK_SYMBOL (symbol
);
880 CHECK_BUFFER (buffer
);
881 buf
= XBUFFER (buffer
);
883 /* Look in local_var_list */
884 result
= Fassoc (symbol
, buf
->local_var_alist
);
890 /* Look in special slots */
891 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
892 offset
< sizeof (struct buffer
);
893 /* sizeof EMACS_INT == sizeof Lisp_Object */
894 offset
+= (sizeof (EMACS_INT
)))
896 idx
= PER_BUFFER_IDX (offset
);
897 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
898 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
899 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
901 result
= PER_BUFFER_VALUE (buf
, offset
);
908 result
= Fdefault_value (symbol
);
912 Lisp_Object valcontents
;
913 Lisp_Object current_alist_element
;
915 /* What binding is loaded right now? */
916 valcontents
= SYMBOL_VALUE (symbol
);
917 current_alist_element
918 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
920 /* The value of the currently loaded binding is not
921 stored in it, but rather in the realvalue slot.
922 Store that value into the binding it belongs to
923 in case that is the one we are about to use. */
925 Fsetcdr (current_alist_element
,
926 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
928 /* Now get the (perhaps updated) value out of the binding. */
929 result
= XCDR (result
);
932 if (EQ (result
, Qunbound
))
933 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
938 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
939 Sbuffer_local_variables
, 0, 1, 0,
940 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
941 Most elements look like (SYMBOL . VALUE), describing one variable.
942 For a symbol that is locally unbound, just the symbol appears in the value.
943 Note that storing new VALUEs in these elements doesn't change the variables.
944 No argument or nil as argument means use current buffer as BUFFER. */)
946 register Lisp_Object buffer
;
948 register struct buffer
*buf
;
949 register Lisp_Object result
;
952 buf
= current_buffer
;
955 CHECK_BUFFER (buffer
);
956 buf
= XBUFFER (buffer
);
962 register Lisp_Object tail
;
963 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
965 Lisp_Object val
, elt
;
969 /* Reference each variable in the alist in buf.
970 If inquiring about the current buffer, this gets the current values,
971 so store them into the alist so the alist is up to date.
972 If inquiring about some other buffer, this swaps out any values
973 for that buffer, making the alist up to date automatically. */
974 val
= find_symbol_value (XCAR (elt
));
975 /* Use the current buffer value only if buf is the current buffer. */
976 if (buf
!= current_buffer
)
979 /* If symbol is unbound, put just the symbol in the list. */
980 if (EQ (val
, Qunbound
))
981 result
= Fcons (XCAR (elt
), result
);
982 /* Otherwise, put (symbol . value) in the list. */
984 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
988 /* Add on all the variables stored in special slots. */
992 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
993 offset
< sizeof (struct buffer
);
994 /* sizeof EMACS_INT == sizeof Lisp_Object */
995 offset
+= (sizeof (EMACS_INT
)))
997 idx
= PER_BUFFER_IDX (offset
);
998 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
999 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1000 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1001 PER_BUFFER_VALUE (buf
, offset
)),
1010 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1012 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1013 No argument or nil as argument means use current buffer as BUFFER. */)
1015 register Lisp_Object buffer
;
1017 register struct buffer
*buf
;
1019 buf
= current_buffer
;
1022 CHECK_BUFFER (buffer
);
1023 buf
= XBUFFER (buffer
);
1026 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1029 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1031 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1032 A non-nil FLAG means mark the buffer modified. */)
1034 register Lisp_Object flag
;
1036 register int already
;
1037 register Lisp_Object fn
;
1038 Lisp_Object buffer
, window
;
1040 #ifdef CLASH_DETECTION
1041 /* If buffer becoming modified, lock the file.
1042 If buffer becoming unmodified, unlock the file. */
1044 fn
= current_buffer
->file_truename
;
1045 /* Test buffer-file-name so that binding it to nil is effective. */
1046 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1048 already
= SAVE_MODIFF
< MODIFF
;
1049 if (!already
&& !NILP (flag
))
1051 else if (already
&& NILP (flag
))
1054 #endif /* CLASH_DETECTION */
1056 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1058 /* Set update_mode_lines only if buffer is displayed in some window.
1059 Packages like jit-lock or lazy-lock preserve a buffer's modified
1060 state by recording/restoring the state around blocks of code.
1061 Setting update_mode_lines makes redisplay consider all windows
1062 (on all frames). Stealth fontification of buffers not displayed
1063 would incur additional redisplay costs if we'd set
1064 update_modes_lines unconditionally.
1066 Ideally, I think there should be another mechanism for fontifying
1067 buffers without "modifying" buffers, or redisplay should be
1068 smarter about updating the `*' in mode lines. --gerd */
1069 XSETBUFFER (buffer
, current_buffer
);
1070 window
= Fget_buffer_window (buffer
, Qt
);
1071 if (WINDOWP (window
))
1073 ++update_mode_lines
;
1074 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1080 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1081 Srestore_buffer_modified_p
, 1, 1, 0,
1082 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1083 It is not ensured that mode lines will be updated to show the modified
1084 state of the current buffer. Use with care. */)
1088 #ifdef CLASH_DETECTION
1091 /* If buffer becoming modified, lock the file.
1092 If buffer becoming unmodified, unlock the file. */
1094 fn
= current_buffer
->file_truename
;
1095 /* Test buffer-file-name so that binding it to nil is effective. */
1096 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1098 int already
= SAVE_MODIFF
< MODIFF
;
1099 if (!already
&& !NILP (flag
))
1101 else if (already
&& NILP (flag
))
1104 #endif /* CLASH_DETECTION */
1106 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1110 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1112 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1113 Each buffer has a tick counter which is incremented each time the text in
1114 that buffer is changed. It wraps around occasionally.
1115 No argument or nil as argument means use current buffer as BUFFER. */)
1117 register Lisp_Object buffer
;
1119 register struct buffer
*buf
;
1121 buf
= current_buffer
;
1124 CHECK_BUFFER (buffer
);
1125 buf
= XBUFFER (buffer
);
1128 return make_number (BUF_MODIFF (buf
));
1131 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1132 "sRename buffer (to new name): \nP",
1133 doc
: /* Change current buffer's name to NEWNAME (a string).
1134 If second arg UNIQUE is nil or omitted, it is an error if a
1135 buffer named NEWNAME already exists.
1136 If UNIQUE is non-nil, come up with a new name using
1137 `generate-new-buffer-name'.
1138 Interactively, you can set UNIQUE with a prefix argument.
1139 We return the name we actually gave the buffer.
1140 This does not change the name of the visited file (if any). */)
1142 register Lisp_Object newname
, unique
;
1144 register Lisp_Object tem
, buf
;
1146 CHECK_STRING (newname
);
1148 if (SCHARS (newname
) == 0)
1149 error ("Empty string is invalid as a buffer name");
1151 tem
= Fget_buffer (newname
);
1154 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1155 rename the buffer automatically so you can create another
1156 with the original name. It makes UNIQUE equivalent to
1157 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1158 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1159 return current_buffer
->name
;
1161 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1163 error ("Buffer name `%s' is in use", SDATA (newname
));
1166 current_buffer
->name
= newname
;
1168 /* Catch redisplay's attention. Unless we do this, the mode lines for
1169 any windows displaying current_buffer will stay unchanged. */
1170 update_mode_lines
++;
1172 XSETBUFFER (buf
, current_buffer
);
1173 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1174 if (NILP (current_buffer
->filename
)
1175 && !NILP (current_buffer
->auto_save_file_name
))
1176 call0 (intern ("rename-auto-save-file"));
1177 /* Refetch since that last call may have done GC. */
1178 return current_buffer
->name
;
1181 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1182 doc
: /* Return most recently selected buffer other than BUFFER.
1183 Buffers not visible in windows are preferred to visible buffers,
1184 unless optional second argument VISIBLE-OK is non-nil.
1185 If the optional third argument FRAME is non-nil, use that frame's
1186 buffer list instead of the selected frame's buffer list.
1187 If no other buffer exists, the buffer `*scratch*' is returned.
1188 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1189 (buffer
, visible_ok
, frame
)
1190 register Lisp_Object buffer
, visible_ok
, frame
;
1192 Lisp_Object
Fset_buffer_major_mode ();
1193 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1197 frame
= selected_frame
;
1199 tail
= Vbuffer_alist
;
1200 pred
= frame_buffer_predicate (frame
);
1202 /* Consider buffers that have been seen in the selected frame
1203 before other buffers. */
1205 tem
= frame_buffer_list (frame
);
1209 if (BUFFERP (XCAR (tem
)))
1210 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1213 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1215 for (; CONSP (tail
); tail
= XCDR (tail
))
1217 buf
= Fcdr (XCAR (tail
));
1218 if (EQ (buf
, buffer
))
1222 if (NILP (XBUFFER (buf
)->name
))
1224 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1226 /* If the selected frame has a buffer_predicate,
1227 disregard buffers that don't fit the predicate. */
1230 tem
= call1 (pred
, buf
);
1235 if (NILP (visible_ok
))
1236 tem
= Fget_buffer_window (buf
, Qvisible
);
1241 if (NILP (notsogood
))
1244 if (!NILP (notsogood
))
1246 buf
= Fget_buffer (build_string ("*scratch*"));
1249 buf
= Fget_buffer_create (build_string ("*scratch*"));
1250 Fset_buffer_major_mode (buf
);
1255 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1257 doc
: /* Make BUFFER stop keeping undo information.
1258 No argument or nil as argument means do this for the current buffer. */)
1260 register Lisp_Object buffer
;
1262 Lisp_Object real_buffer
;
1265 XSETBUFFER (real_buffer
, current_buffer
);
1268 real_buffer
= Fget_buffer (buffer
);
1269 if (NILP (real_buffer
))
1273 XBUFFER (real_buffer
)->undo_list
= Qt
;
1278 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1280 doc
: /* Start keeping undo information for buffer BUFFER.
1281 No argument or nil as argument means do this for the current buffer. */)
1283 register Lisp_Object buffer
;
1285 Lisp_Object real_buffer
;
1288 XSETBUFFER (real_buffer
, current_buffer
);
1291 real_buffer
= Fget_buffer (buffer
);
1292 if (NILP (real_buffer
))
1296 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1297 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1303 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1304 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1305 The buffer being killed will be current while the hook is running.\n\
1308 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1309 doc
: /* Kill the buffer BUFFER.
1310 The argument may be a buffer or may be the name of a buffer.
1311 An argument of nil means kill the current buffer.
1313 Value is t if the buffer is actually killed, nil if user says no.
1315 The value of `kill-buffer-hook' (which may be local to that buffer),
1316 if not void, is a list of functions to be called, with no arguments,
1317 before the buffer is actually killed. The buffer to be killed is current
1318 when the hook functions are called.
1320 Any processes that have this buffer as the `process-buffer' are killed
1326 register struct buffer
*b
;
1327 register Lisp_Object tem
;
1328 register struct Lisp_Marker
*m
;
1329 struct gcpro gcpro1
;
1332 buf
= Fcurrent_buffer ();
1334 buf
= Fget_buffer (buffer
);
1340 /* Avoid trouble for buffer already dead. */
1344 /* Query if the buffer is still modified. */
1345 if (INTERACTIVE
&& !NILP (b
->filename
)
1346 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1349 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1350 b
->name
, make_number (0)));
1356 /* Run hooks with the buffer to be killed the current buffer. */
1358 int count
= SPECPDL_INDEX ();
1359 Lisp_Object arglist
[1];
1361 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1362 set_buffer_internal (b
);
1364 /* First run the query functions; if any query is answered no,
1365 don't kill the buffer. */
1366 arglist
[0] = Qkill_buffer_query_functions
;
1367 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1368 return unbind_to (count
, Qnil
);
1370 /* Then run the hooks. */
1371 Frun_hooks (1, &Qkill_buffer_hook
);
1372 unbind_to (count
, Qnil
);
1375 /* We have no more questions to ask. Verify that it is valid
1376 to kill the buffer. This must be done after the questions
1377 since anything can happen within do_yes_or_no_p. */
1379 /* Don't kill the minibuffer now current. */
1380 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1386 /* When we kill a base buffer, kill all its indirect buffers.
1387 We do it at this stage so nothing terrible happens if they
1388 ask questions or their hooks get errors. */
1389 if (! b
->base_buffer
)
1391 struct buffer
*other
;
1395 for (other
= all_buffers
; other
; other
= other
->next
)
1396 /* all_buffers contains dead buffers too;
1397 don't re-kill them. */
1398 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1401 XSETBUFFER (buf
, other
);
1408 /* Make this buffer not be current.
1409 In the process, notice if this is the sole visible buffer
1410 and give up if so. */
1411 if (b
== current_buffer
)
1413 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1415 if (b
== current_buffer
)
1419 /* Notice if the buffer to kill is the sole visible buffer
1420 when we're currently in the mini-buffer, and give up if so. */
1421 XSETBUFFER (tem
, current_buffer
);
1422 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1424 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1429 /* Now there is no question: we can kill the buffer. */
1431 #ifdef CLASH_DETECTION
1432 /* Unlock this buffer's file, if it is locked. */
1434 #endif /* CLASH_DETECTION */
1436 kill_buffer_processes (buf
);
1437 clear_charpos_cache (b
);
1439 tem
= Vinhibit_quit
;
1441 replace_buffer_in_all_windows (buf
);
1442 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1443 frames_discard_buffer (buf
);
1444 Vinhibit_quit
= tem
;
1446 /* Delete any auto-save file, if we saved it in this session.
1447 But not if the buffer is modified. */
1448 if (STRINGP (b
->auto_save_file_name
)
1449 && b
->auto_save_modified
!= 0
1450 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1451 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1452 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1455 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1457 internal_delete_file (b
->auto_save_file_name
);
1462 /* Unchain all markers that belong to this indirect buffer.
1463 Don't unchain the markers that belong to the base buffer
1464 or its other indirect buffers. */
1465 for (m
= BUF_MARKERS (b
); m
; )
1467 struct Lisp_Marker
*next
= m
->next
;
1475 /* Unchain all markers of this buffer and its indirect buffers.
1476 and leave them pointing nowhere. */
1477 for (m
= BUF_MARKERS (b
); m
; )
1479 struct Lisp_Marker
*next
= m
->next
;
1484 BUF_MARKERS (b
) = NULL
;
1485 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1487 /* Perhaps we should explicitly free the interval tree here... */
1490 /* Reset the local variables, so that this buffer's local values
1491 won't be protected from GC. They would be protected
1492 if they happened to remain encached in their symbols.
1493 This gets rid of them for certain. */
1494 swap_out_buffer_local_variables (b
);
1495 reset_buffer_local_variables (b
, 1);
1500 if (! b
->base_buffer
)
1501 free_buffer_text (b
);
1503 if (b
->newline_cache
)
1505 free_region_cache (b
->newline_cache
);
1506 b
->newline_cache
= 0;
1508 if (b
->width_run_cache
)
1510 free_region_cache (b
->width_run_cache
);
1511 b
->width_run_cache
= 0;
1513 b
->width_table
= Qnil
;
1515 b
->undo_list
= Qnil
;
1520 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1521 we do this each time BUF is selected visibly, the more recently
1522 selected buffers are always closer to the front of the list. This
1523 means that other_buffer is more likely to choose a relevant buffer. */
1529 register Lisp_Object link
, prev
;
1531 frame
= selected_frame
;
1534 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1536 if (EQ (XCDR (XCAR (link
)), buf
))
1541 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1542 we cannot use Fdelq itself here because it allows quitting. */
1545 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1547 XSETCDR (prev
, XCDR (XCDR (prev
)));
1549 XSETCDR (link
, Vbuffer_alist
);
1550 Vbuffer_alist
= link
;
1552 /* Now move this buffer to the front of frame_buffer_list also. */
1555 for (link
= frame_buffer_list (frame
); CONSP (link
);
1558 if (EQ (XCAR (link
), buf
))
1563 /* Effectively do delq. */
1568 set_frame_buffer_list (frame
,
1569 XCDR (frame_buffer_list (frame
)));
1571 XSETCDR (prev
, XCDR (XCDR (prev
)));
1573 XSETCDR (link
, frame_buffer_list (frame
));
1574 set_frame_buffer_list (frame
, link
);
1577 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1580 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1581 doc
: /* Set an appropriate major mode for BUFFER.
1582 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1583 according to `default-major-mode'.
1584 Use this function before selecting the buffer, since it may need to inspect
1585 the current buffer's major mode. */)
1590 Lisp_Object function
;
1592 if (STRINGP (XBUFFER (buffer
)->name
)
1593 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1594 function
= find_symbol_value (intern ("initial-major-mode"));
1597 function
= buffer_defaults
.major_mode
;
1599 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1600 function
= current_buffer
->major_mode
;
1603 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1606 count
= SPECPDL_INDEX ();
1608 /* To select a nonfundamental mode,
1609 select the buffer temporarily and then call the mode function. */
1611 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1613 Fset_buffer (buffer
);
1616 return unbind_to (count
, Qnil
);
1619 /* If switching buffers in WINDOW would be an error, return
1620 a C string saying what the error would be. */
1623 no_switch_window (window
)
1627 if (EQ (minibuf_window
, window
))
1628 return "Cannot switch buffers in minibuffer window";
1629 tem
= Fwindow_dedicated_p (window
);
1631 return "Cannot switch buffers in a dedicated window";
1635 /* Switch to buffer BUFFER in the selected window.
1636 If NORECORD is non-nil, don't call record_buffer. */
1639 switch_to_buffer_1 (buffer
, norecord
)
1640 Lisp_Object buffer
, norecord
;
1642 register Lisp_Object buf
;
1645 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1648 buf
= Fget_buffer (buffer
);
1651 buf
= Fget_buffer_create (buffer
);
1652 Fset_buffer_major_mode (buf
);
1656 if (NILP (norecord
))
1657 record_buffer (buf
);
1659 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1660 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1667 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1668 doc
: /* Select buffer BUFFER in the current window.
1669 If BUFFER does not identify an existing buffer,
1670 then this function creates a buffer with that name.
1672 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1673 or nil. If BUFFER is nil, then this function chooses a buffer
1674 using `other-buffer'.
1675 Optional second arg NORECORD non-nil means
1676 do not put this buffer at the front of the list of recently selected ones.
1677 This function returns the buffer it switched to.
1679 WARNING: This is NOT the way to work on another buffer temporarily
1680 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1681 the window-buffer correspondences. */)
1683 Lisp_Object buffer
, norecord
;
1687 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1688 /* Basically a NOP. Avoid signalling an error if the selected window
1689 is dedicated, or a minibuffer, ... */
1690 return Fset_buffer (buffer
);
1692 err
= no_switch_window (selected_window
);
1693 if (err
) error (err
);
1695 return switch_to_buffer_1 (buffer
, norecord
);
1698 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1699 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1700 BUFFER may be a buffer, a string \(a buffer name), or nil.
1701 If BUFFER is a string which is not the name of an existing buffer,
1702 then this function creates a buffer with that name.
1703 If BUFFER is nil, then it chooses some other buffer.
1704 If `pop-up-windows' is non-nil, windows can be split to do this.
1705 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1706 window even if BUFFER is already visible in the selected window,
1707 and ignore `same-window-regexps' and `same-window-buffer-names'.
1708 This function returns the buffer it switched to.
1709 This uses the function `display-buffer' as a subroutine; see the documentation
1710 of `display-buffer' for additional customization information.
1712 Optional third arg NORECORD non-nil means
1713 do not put this buffer at the front of the list of recently selected ones. */)
1714 (buffer
, other_window
, norecord
)
1715 Lisp_Object buffer
, other_window
, norecord
;
1717 register Lisp_Object buf
;
1719 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1722 buf
= Fget_buffer (buffer
);
1725 buf
= Fget_buffer_create (buffer
);
1726 Fset_buffer_major_mode (buf
);
1730 if (NILP (norecord
))
1731 /* Why bother ? Fselect_window will do it for us anyway. -stef */
1732 record_buffer (buf
);
1733 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1737 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1738 doc
: /* Return the current buffer as a Lisp object. */)
1741 register Lisp_Object buf
;
1742 XSETBUFFER (buf
, current_buffer
);
1746 /* Set the current buffer to B.
1748 We previously set windows_or_buffers_changed here to invalidate
1749 global unchanged information in beg_unchanged and end_unchanged.
1750 This is no longer necessary because we now compute unchanged
1751 information on a buffer-basis. Every action affecting other
1752 windows than the selected one requires a select_window at some
1753 time, and that increments windows_or_buffers_changed. */
1756 set_buffer_internal (b
)
1757 register struct buffer
*b
;
1759 if (current_buffer
!= b
)
1760 set_buffer_internal_1 (b
);
1763 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1764 This is used by redisplay. */
1767 set_buffer_internal_1 (b
)
1768 register struct buffer
*b
;
1770 register struct buffer
*old_buf
;
1771 register Lisp_Object tail
, valcontents
;
1774 #ifdef USE_MMAP_FOR_BUFFERS
1775 if (b
->text
->beg
== NULL
)
1776 enlarge_buffer_text (b
, 0);
1777 #endif /* USE_MMAP_FOR_BUFFERS */
1779 if (current_buffer
== b
)
1782 old_buf
= current_buffer
;
1784 last_known_column_point
= -1; /* invalidate indentation cache */
1788 /* Put the undo list back in the base buffer, so that it appears
1789 that an indirect buffer shares the undo list of its base. */
1790 if (old_buf
->base_buffer
)
1791 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1793 /* If the old current buffer has markers to record PT, BEGV and ZV
1794 when it is not current, update them now. */
1795 if (! NILP (old_buf
->pt_marker
))
1798 XSETBUFFER (obuf
, old_buf
);
1799 set_marker_both (old_buf
->pt_marker
, obuf
,
1800 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1802 if (! NILP (old_buf
->begv_marker
))
1805 XSETBUFFER (obuf
, old_buf
);
1806 set_marker_both (old_buf
->begv_marker
, obuf
,
1807 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1809 if (! NILP (old_buf
->zv_marker
))
1812 XSETBUFFER (obuf
, old_buf
);
1813 set_marker_both (old_buf
->zv_marker
, obuf
,
1814 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1818 /* Get the undo list from the base buffer, so that it appears
1819 that an indirect buffer shares the undo list of its base. */
1821 b
->undo_list
= b
->base_buffer
->undo_list
;
1823 /* If the new current buffer has markers to record PT, BEGV and ZV
1824 when it is not current, fetch them now. */
1825 if (! NILP (b
->pt_marker
))
1827 BUF_PT (b
) = marker_position (b
->pt_marker
);
1828 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1830 if (! NILP (b
->begv_marker
))
1832 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1833 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1835 if (! NILP (b
->zv_marker
))
1837 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1838 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1841 /* Look down buffer's list of local Lisp variables
1842 to find and update any that forward into C variables. */
1844 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1846 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1847 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1848 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1849 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1850 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1851 /* Just reference the variable
1852 to cause it to become set for this buffer. */
1853 Fsymbol_value (XCAR (XCAR (tail
)));
1856 /* Do the same with any others that were local to the previous buffer */
1859 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1861 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1862 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1863 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1864 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1865 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1866 /* Just reference the variable
1867 to cause it to become set for this buffer. */
1868 Fsymbol_value (XCAR (XCAR (tail
)));
1872 /* Switch to buffer B temporarily for redisplay purposes.
1873 This avoids certain things that don't need to be done within redisplay. */
1879 register struct buffer
*old_buf
;
1881 if (current_buffer
== b
)
1884 old_buf
= current_buffer
;
1889 /* If the old current buffer has markers to record PT, BEGV and ZV
1890 when it is not current, update them now. */
1891 if (! NILP (old_buf
->pt_marker
))
1894 XSETBUFFER (obuf
, old_buf
);
1895 set_marker_both (old_buf
->pt_marker
, obuf
,
1896 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1898 if (! NILP (old_buf
->begv_marker
))
1901 XSETBUFFER (obuf
, old_buf
);
1902 set_marker_both (old_buf
->begv_marker
, obuf
,
1903 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1905 if (! NILP (old_buf
->zv_marker
))
1908 XSETBUFFER (obuf
, old_buf
);
1909 set_marker_both (old_buf
->zv_marker
, obuf
,
1910 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1914 /* If the new current buffer has markers to record PT, BEGV and ZV
1915 when it is not current, fetch them now. */
1916 if (! NILP (b
->pt_marker
))
1918 BUF_PT (b
) = marker_position (b
->pt_marker
);
1919 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1921 if (! NILP (b
->begv_marker
))
1923 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1924 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1926 if (! NILP (b
->zv_marker
))
1928 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1929 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1933 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1934 doc
: /* Make the buffer BUFFER current for editing operations.
1935 BUFFER may be a buffer or the name of an existing buffer.
1936 See also `save-excursion' when you want to make a buffer current temporarily.
1937 This function does not display the buffer, so its effect ends
1938 when the current command terminates.
1939 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1941 register Lisp_Object buffer
;
1943 register Lisp_Object buf
;
1944 buf
= Fget_buffer (buffer
);
1947 if (NILP (XBUFFER (buf
)->name
))
1948 error ("Selecting deleted buffer");
1949 set_buffer_internal (XBUFFER (buf
));
1953 /* Set the current buffer to BUFFER provided it is alive. */
1956 set_buffer_if_live (buffer
)
1959 if (! NILP (XBUFFER (buffer
)->name
))
1960 Fset_buffer (buffer
);
1964 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1965 Sbarf_if_buffer_read_only
, 0, 0, 0,
1966 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1969 if (!NILP (current_buffer
->read_only
)
1970 && NILP (Vinhibit_read_only
))
1971 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1975 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1976 doc
: /* Put BUFFER at the end of the list of all buffers.
1977 There it is the least likely candidate for `other-buffer' to return;
1978 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1979 If BUFFER is nil or omitted, bury the current buffer.
1980 Also, if BUFFER is nil or omitted, remove the current buffer from the
1981 selected window if it is displayed there. */)
1983 register Lisp_Object buffer
;
1985 /* Figure out what buffer we're going to bury. */
1989 XSETBUFFER (buffer
, current_buffer
);
1991 tem
= Fwindow_buffer (selected_window
);
1992 /* If we're burying the current buffer, unshow it. */
1993 if (EQ (buffer
, tem
))
1995 if (NILP (Fwindow_dedicated_p (selected_window
)))
1996 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1997 else if (NILP (XWINDOW (selected_window
)->parent
))
1998 Ficonify_frame (Fwindow_frame (selected_window
));
2000 Fdelete_window (selected_window
);
2007 buf1
= Fget_buffer (buffer
);
2013 /* Move buffer to the end of the buffer list. Do nothing if the
2014 buffer is killed. */
2015 if (!NILP (XBUFFER (buffer
)->name
))
2017 Lisp_Object aelt
, link
;
2019 aelt
= Frassq (buffer
, Vbuffer_alist
);
2020 link
= Fmemq (aelt
, Vbuffer_alist
);
2021 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2022 XSETCDR (link
, Qnil
);
2023 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2025 /* Removing BUFFER from frame-specific lists
2026 has the effect of putting BUFFER at the end
2027 of the combined list in each frame. */
2028 frames_discard_buffer (buffer
);
2034 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2035 doc
: /* Delete the entire contents of the current buffer.
2036 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2037 so the buffer is truly empty after this. */)
2044 current_buffer
->last_window_start
= 1;
2045 /* Prevent warnings, or suspension of auto saving, that would happen
2046 if future size is less than past size. Use of erase-buffer
2047 implies that the future text is not really related to the past text. */
2048 XSETFASTINT (current_buffer
->save_length
, 0);
2053 validate_region (b
, e
)
2054 register Lisp_Object
*b
, *e
;
2056 CHECK_NUMBER_COERCE_MARKER (*b
);
2057 CHECK_NUMBER_COERCE_MARKER (*e
);
2059 if (XINT (*b
) > XINT (*e
))
2062 tem
= *b
; *b
= *e
; *e
= tem
;
2065 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2066 && XINT (*e
) <= ZV
))
2067 args_out_of_range (*b
, *e
);
2070 /* Advance BYTE_POS up to a character boundary
2071 and return the adjusted position. */
2074 advance_to_char_boundary (byte_pos
)
2079 if (byte_pos
== BEG
)
2080 /* Beginning of buffer is always a character boundary. */
2083 c
= FETCH_BYTE (byte_pos
);
2084 if (! CHAR_HEAD_P (c
))
2086 /* We should advance BYTE_POS only when C is a constituent of a
2087 multibyte sequence. */
2088 int orig_byte_pos
= byte_pos
;
2093 c
= FETCH_BYTE (byte_pos
);
2095 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2097 if (byte_pos
< orig_byte_pos
)
2098 byte_pos
= orig_byte_pos
;
2099 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2100 surely advance to the correct character boundary. If C is
2101 not, BYTE_POS was unchanged. */
2107 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2109 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2110 If FLAG is t, this makes the buffer a multibyte buffer.
2111 If FLAG is nil, this makes the buffer a single-byte buffer.
2112 In these cases, the buffer contents remain unchanged as a sequence of
2113 bytes but the contents viewed as characters do change.
2114 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2115 all eight-bit bytes to eight-bit characters.
2116 If the multibyte flag was really changed, undo information of the
2117 current buffer is cleared. */)
2121 struct Lisp_Marker
*tail
, *markers
;
2122 struct buffer
*other
;
2123 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2125 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2126 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2128 if (current_buffer
->base_buffer
)
2129 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2131 /* Do nothing if nothing actually changes. */
2132 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2135 /* It would be better to update the list,
2136 but this is good enough for now. */
2138 current_buffer
->undo_list
= Qt
;
2140 /* If the cached position is for this buffer, clear it out. */
2141 clear_charpos_cache (current_buffer
);
2144 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2146 begv
= BEGV
, zv
= ZV
;
2156 /* Do this first, so it can use CHAR_TO_BYTE
2157 to calculate the old correspondences. */
2158 set_intervals_multibyte (0);
2160 current_buffer
->enable_multibyte_characters
= Qnil
;
2166 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2169 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2170 tail
->charpos
= tail
->bytepos
;
2172 /* Convert multibyte form of 8-bit characters to unibyte. */
2187 if (ASCII_BYTE_P (*p
))
2189 else if (CHAR_BYTE8_HEAD_P (*p
))
2191 c
= STRING_CHAR_AND_LENGTH (p
, stop
- pos
, bytes
);
2192 /* Delete all bytes for this 8-bit character but the
2193 last one, and change the last one to the charcter
2196 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2208 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2209 p
+= bytes
, pos
+= bytes
;
2213 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2219 unsigned char *p
, *pend
;
2221 /* Be sure not to have a multibyte sequence striding over the GAP.
2222 Ex: We change this: "...abc\302 _GAP_ \241def..."
2223 to: "...abc _GAP_ \302\241def..." */
2226 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2227 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2229 unsigned char *p
= GPT_ADDR
- 1;
2231 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2232 if (BASE_LEADING_CODE_P (*p
))
2234 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2236 move_gap_both (new_gpt
, new_gpt
);
2240 /* Make the buffer contents valid as multibyte by converting
2241 8-bit characters to multibyte form. */
2259 if (ASCII_BYTE_P (*p
))
2261 else if (EQ (flag
, Qt
) && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2262 p
+= bytes
, pos
+= bytes
;
2265 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2268 c
= BYTE8_TO_CHAR (*p
);
2269 bytes
= CHAR_STRING (c
, tmp
);
2271 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2273 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2274 /* Now the gap is after the just inserted data. */
2292 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2294 /* Do this first, so that chars_in_text asks the right question.
2295 set_intervals_multibyte needs it too. */
2296 current_buffer
->enable_multibyte_characters
= Qt
;
2298 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2299 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2301 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2303 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2304 if (BEGV_BYTE
> GPT_BYTE
)
2305 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2307 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2309 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2310 if (ZV_BYTE
> GPT_BYTE
)
2311 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2313 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2316 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2319 if (pt_byte
> GPT_BYTE
)
2320 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2322 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2323 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2326 tail
= markers
= BUF_MARKERS (current_buffer
);
2328 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2329 getting confused by the markers that have not yet been updated.
2330 It is also a signal that it should never create a marker. */
2331 BUF_MARKERS (current_buffer
) = NULL
;
2333 for (; tail
; tail
= tail
->next
)
2335 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2336 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2339 /* Make sure no markers were put on the chain
2340 while the chain value was incorrect. */
2341 if (BUF_MARKERS (current_buffer
))
2344 BUF_MARKERS (current_buffer
) = markers
;
2346 /* Do this last, so it can calculate the new correspondences
2347 between chars and bytes. */
2348 set_intervals_multibyte (1);
2352 current_buffer
->undo_list
= Qnil
;
2354 /* Changing the multibyteness of a buffer means that all windows
2355 showing that buffer must be updated thoroughly. */
2356 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2357 ++windows_or_buffers_changed
;
2359 /* Copy this buffer's new multibyte status
2360 into all of its indirect buffers. */
2361 for (other
= all_buffers
; other
; other
= other
->next
)
2362 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2364 other
->enable_multibyte_characters
2365 = current_buffer
->enable_multibyte_characters
;
2366 other
->prevent_redisplay_optimizations_p
= 1;
2369 /* Restore the modifiedness of the buffer. */
2370 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2371 Fset_buffer_modified_p (Qnil
);
2374 /* Update coding systems of this buffer's process (if any). */
2376 Lisp_Object process
;
2378 process
= Fget_buffer_process (Fcurrent_buffer ());
2379 if (PROCESSP (process
))
2380 setup_process_coding_systems (process
);
2382 #endif /* subprocesses */
2387 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2389 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2390 Most local variable bindings are eliminated so that the default values
2391 become effective once more. Also, the syntax table is set from
2392 `standard-syntax-table', the local keymap is set to nil,
2393 and the abbrev table from `fundamental-mode-abbrev-table'.
2394 This function also forces redisplay of the mode line.
2396 Every function to select a new major mode starts by
2397 calling this function.
2399 As a special exception, local variables whose names have
2400 a non-nil `permanent-local' property are not eliminated by this function.
2402 The first thing this function does is run
2403 the normal hook `change-major-mode-hook'. */)
2406 register Lisp_Object alist
, sym
, tem
;
2409 if (!NILP (Vrun_hooks
))
2410 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2411 oalist
= current_buffer
->local_var_alist
;
2413 /* Make sure none of the bindings in oalist
2414 remain swapped in, in their symbols. */
2416 swap_out_buffer_local_variables (current_buffer
);
2418 /* Actually eliminate all local bindings of this buffer. */
2420 reset_buffer_local_variables (current_buffer
, 0);
2422 /* Any which are supposed to be permanent,
2423 make local again, with the same values they had. */
2425 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2427 sym
= XCAR (XCAR (alist
));
2428 tem
= Fget (sym
, Qpermanent_local
);
2431 Fmake_local_variable (sym
);
2432 Fset (sym
, XCDR (XCAR (alist
)));
2436 /* Force mode-line redisplay. Useful here because all major mode
2437 commands call this function. */
2438 update_mode_lines
++;
2443 /* Make sure no local variables remain set up with buffer B
2444 for their current values. */
2447 swap_out_buffer_local_variables (b
)
2450 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2452 XSETBUFFER (buffer
, b
);
2453 oalist
= b
->local_var_alist
;
2455 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2457 sym
= XCAR (XCAR (alist
));
2459 /* Need not do anything if some other buffer's binding is now encached. */
2460 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2461 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2463 /* Symbol is set up for this buffer's old local value.
2464 Set it up for the current buffer with the default value. */
2466 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2467 /* Store the symbol's current value into the alist entry
2468 it is currently set up for. This is so that, if the
2469 local is marked permanent, and we make it local again
2470 later in Fkill_all_local_variables, we don't lose the value. */
2471 XSETCDR (XCAR (tem
),
2472 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2473 /* Switch to the symbol's default-value alist entry. */
2475 /* Mark it as current for buffer B. */
2476 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2477 /* Store the current value into any forwarding in the symbol. */
2478 store_symval_forwarding (sym
,
2479 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2485 /* Find all the overlays in the current buffer that contain position POS.
2486 Return the number found, and store them in a vector in *VEC_PTR.
2487 Store in *LEN_PTR the size allocated for the vector.
2488 Store in *NEXT_PTR the next position after POS where an overlay starts,
2489 or ZV if there are no more overlays.
2490 Store in *PREV_PTR the previous position before POS where an overlay ends,
2491 or where an overlay starts which ends at or after POS;
2492 or BEGV if there are no such overlays.
2493 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2495 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2496 when this function is called.
2498 If EXTEND is non-zero, we make the vector bigger if necessary.
2499 If EXTEND is zero, we never extend the vector,
2500 and we store only as many overlays as will fit.
2501 But we still return the total number of overlays.
2503 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2504 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2505 default (BEGV or ZV). */
2508 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2511 Lisp_Object
**vec_ptr
;
2517 Lisp_Object overlay
, start
, end
;
2518 struct Lisp_Overlay
*tail
;
2521 Lisp_Object
*vec
= *vec_ptr
;
2524 int inhibit_storing
= 0;
2526 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2528 int startpos
, endpos
;
2530 XSETMISC (overlay
, tail
);
2532 start
= OVERLAY_START (overlay
);
2533 end
= OVERLAY_END (overlay
);
2534 endpos
= OVERLAY_POSITION (end
);
2541 startpos
= OVERLAY_POSITION (start
);
2542 /* This one ends at or after POS
2543 so its start counts for PREV_PTR if it's before POS. */
2544 if (prev
< startpos
&& startpos
< pos
)
2548 if (startpos
<= pos
)
2552 /* The supplied vector is full.
2553 Either make it bigger, or don't store any more in it. */
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
)
2570 /* Keep counting overlays even if we can't return them all. */
2573 else if (startpos
< next
)
2577 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2579 int startpos
, endpos
;
2581 XSETMISC (overlay
, tail
);
2583 start
= OVERLAY_START (overlay
);
2584 end
= OVERLAY_END (overlay
);
2585 startpos
= OVERLAY_POSITION (start
);
2588 if (startpos
< next
)
2592 endpos
= OVERLAY_POSITION (end
);
2599 /* Make it work with an initial len == 0. */
2604 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2608 inhibit_storing
= 1;
2611 if (!inhibit_storing
)
2615 if (startpos
< pos
&& startpos
> prev
)
2618 else if (endpos
< pos
&& endpos
> prev
)
2620 else if (endpos
== pos
&& startpos
> prev
2621 && (!change_req
|| startpos
< pos
))
2632 /* Find all the overlays in the current buffer that overlap the range BEG-END
2633 or are empty at BEG.
2635 Return the number found, and store them in a vector in *VEC_PTR.
2636 Store in *LEN_PTR the size allocated for the vector.
2637 Store in *NEXT_PTR the next position after POS where an overlay starts,
2638 or ZV if there are no more overlays.
2639 Store in *PREV_PTR the previous position before POS where an overlay ends,
2640 or BEGV if there are no previous overlays.
2641 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2643 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2644 when this function is called.
2646 If EXTEND is non-zero, we make the vector bigger if necessary.
2647 If EXTEND is zero, we never extend the vector,
2648 and we store only as many overlays as will fit.
2649 But we still return the total number of overlays. */
2652 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2655 Lisp_Object
**vec_ptr
;
2660 Lisp_Object overlay
, ostart
, oend
;
2661 struct Lisp_Overlay
*tail
;
2664 Lisp_Object
*vec
= *vec_ptr
;
2667 int inhibit_storing
= 0;
2669 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2671 int startpos
, endpos
;
2673 XSETMISC (overlay
, tail
);
2675 ostart
= OVERLAY_START (overlay
);
2676 oend
= OVERLAY_END (overlay
);
2677 endpos
= OVERLAY_POSITION (oend
);
2684 startpos
= OVERLAY_POSITION (ostart
);
2685 /* Count an interval if it either overlaps the range
2686 or is empty at the start of the range. */
2687 if ((beg
< endpos
&& startpos
< end
)
2688 || (startpos
== endpos
&& beg
== endpos
))
2692 /* The supplied vector is full.
2693 Either make it bigger, or don't store any more in it. */
2696 /* Make it work with an initial len == 0. */
2701 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2705 inhibit_storing
= 1;
2708 if (!inhibit_storing
)
2710 /* Keep counting overlays even if we can't return them all. */
2713 else if (startpos
< next
)
2717 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2719 int startpos
, endpos
;
2721 XSETMISC (overlay
, tail
);
2723 ostart
= OVERLAY_START (overlay
);
2724 oend
= OVERLAY_END (overlay
);
2725 startpos
= OVERLAY_POSITION (ostart
);
2728 if (startpos
< next
)
2732 endpos
= OVERLAY_POSITION (oend
);
2733 /* Count an interval if it either overlaps the range
2734 or is empty at the start of the range. */
2735 if ((beg
< endpos
&& startpos
< end
)
2736 || (startpos
== endpos
&& beg
== endpos
))
2742 /* Make it work with an initial len == 0. */
2747 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2751 inhibit_storing
= 1;
2754 if (!inhibit_storing
)
2758 else if (endpos
< beg
&& endpos
> prev
)
2770 /* Return non-zero if there exists an overlay with a non-nil
2771 `mouse-face' property overlapping OVERLAY. */
2774 mouse_face_overlay_overlaps (overlay
)
2775 Lisp_Object overlay
;
2777 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2778 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2780 Lisp_Object
*v
, tem
;
2783 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2784 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2787 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2788 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2791 for (i
= 0; i
< n
; ++i
)
2792 if (!EQ (v
[i
], overlay
)
2793 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2802 /* Fast function to just test if we're at an overlay boundary. */
2804 overlay_touches_p (pos
)
2807 Lisp_Object overlay
;
2808 struct Lisp_Overlay
*tail
;
2810 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2814 XSETMISC (overlay
,tail
);
2815 if (!GC_OVERLAYP (overlay
))
2818 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2821 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2825 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2829 XSETMISC (overlay
, tail
);
2830 if (!GC_OVERLAYP (overlay
))
2833 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2836 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2844 Lisp_Object overlay
;
2850 compare_overlays (v1
, v2
)
2851 const void *v1
, *v2
;
2853 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2854 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2855 if (s1
->priority
!= s2
->priority
)
2856 return s1
->priority
- s2
->priority
;
2857 if (s1
->beg
!= s2
->beg
)
2858 return s1
->beg
- s2
->beg
;
2859 if (s1
->end
!= s2
->end
)
2860 return s2
->end
- s1
->end
;
2864 /* Sort an array of overlays by priority. The array is modified in place.
2865 The return value is the new size; this may be smaller than the original
2866 size if some of the overlays were invalid or were window-specific. */
2868 sort_overlays (overlay_vec
, noverlays
, w
)
2869 Lisp_Object
*overlay_vec
;
2874 struct sortvec
*sortvec
;
2875 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2877 /* Put the valid and relevant overlays into sortvec. */
2879 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2882 Lisp_Object overlay
;
2884 overlay
= overlay_vec
[i
];
2885 if (OVERLAY_VALID (overlay
)
2886 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2887 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2889 /* If we're interested in a specific window, then ignore
2890 overlays that are limited to some other window. */
2895 window
= Foverlay_get (overlay
, Qwindow
);
2896 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2900 /* This overlay is good and counts: put it into sortvec. */
2901 sortvec
[j
].overlay
= overlay
;
2902 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2903 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2904 tem
= Foverlay_get (overlay
, Qpriority
);
2906 sortvec
[j
].priority
= XINT (tem
);
2908 sortvec
[j
].priority
= 0;
2914 /* Sort the overlays into the proper order: increasing priority. */
2917 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2919 for (i
= 0; i
< noverlays
; i
++)
2920 overlay_vec
[i
] = sortvec
[i
].overlay
;
2926 Lisp_Object string
, string2
;
2933 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2934 int size
; /* Allocated length of that array. */
2935 int used
; /* How much of the array is currently in use. */
2936 int bytes
; /* Total length of the strings in buf. */
2939 /* Buffers for storing information about the overlays touching a given
2940 position. These could be automatic variables in overlay_strings, but
2941 it's more efficient to hold onto the memory instead of repeatedly
2942 allocating and freeing it. */
2943 static struct sortstrlist overlay_heads
, overlay_tails
;
2944 static unsigned char *overlay_str_buf
;
2946 /* Allocated length of overlay_str_buf. */
2947 static int overlay_str_len
;
2949 /* A comparison function suitable for passing to qsort. */
2951 cmp_for_strings (as1
, as2
)
2954 struct sortstr
*s1
= (struct sortstr
*)as1
;
2955 struct sortstr
*s2
= (struct sortstr
*)as2
;
2956 if (s1
->size
!= s2
->size
)
2957 return s2
->size
- s1
->size
;
2958 if (s1
->priority
!= s2
->priority
)
2959 return s1
->priority
- s2
->priority
;
2964 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2965 struct sortstrlist
*ssl
;
2966 Lisp_Object str
, str2
, pri
;
2971 if (ssl
->used
== ssl
->size
)
2977 ssl
->buf
= ((struct sortstr
*)
2978 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2980 ssl
->buf
[ssl
->used
].string
= str
;
2981 ssl
->buf
[ssl
->used
].string2
= str2
;
2982 ssl
->buf
[ssl
->used
].size
= size
;
2983 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2986 if (NILP (current_buffer
->enable_multibyte_characters
))
2987 nbytes
= SCHARS (str
);
2988 else if (! STRING_MULTIBYTE (str
))
2989 nbytes
= count_size_as_multibyte (SDATA (str
),
2992 nbytes
= SBYTES (str
);
2994 ssl
->bytes
+= nbytes
;
2998 if (NILP (current_buffer
->enable_multibyte_characters
))
2999 nbytes
= SCHARS (str2
);
3000 else if (! STRING_MULTIBYTE (str2
))
3001 nbytes
= count_size_as_multibyte (SDATA (str2
),
3004 nbytes
= SBYTES (str2
);
3006 ssl
->bytes
+= nbytes
;
3010 /* Return the concatenation of the strings associated with overlays that
3011 begin or end at POS, ignoring overlays that are specific to a window
3012 other than W. The strings are concatenated in the appropriate order:
3013 shorter overlays nest inside longer ones, and higher priority inside
3014 lower. Normally all of the after-strings come first, but zero-sized
3015 overlays have their after-strings ride along with the before-strings
3016 because it would look strange to print them inside-out.
3018 Returns the string length, and stores the contents indirectly through
3019 PSTR, if that variable is non-null. The string may be overwritten by
3020 subsequent calls. */
3023 overlay_strings (pos
, w
, pstr
)
3026 unsigned char **pstr
;
3028 Lisp_Object overlay
, window
, str
;
3029 struct Lisp_Overlay
*ov
;
3030 int startpos
, endpos
;
3031 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3033 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3034 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3035 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3037 XSETMISC (overlay
, ov
);
3038 eassert (OVERLAYP (overlay
));
3040 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3041 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3044 if (endpos
!= pos
&& startpos
!= pos
)
3046 window
= Foverlay_get (overlay
, Qwindow
);
3047 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3050 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3051 record_overlay_string (&overlay_heads
, str
,
3053 ? Foverlay_get (overlay
, Qafter_string
)
3055 Foverlay_get (overlay
, Qpriority
),
3057 else if (endpos
== pos
3058 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3059 record_overlay_string (&overlay_tails
, str
, Qnil
,
3060 Foverlay_get (overlay
, Qpriority
),
3063 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3065 XSETMISC (overlay
, ov
);
3066 eassert (OVERLAYP (overlay
));
3068 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3069 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3072 if (endpos
!= pos
&& startpos
!= pos
)
3074 window
= Foverlay_get (overlay
, Qwindow
);
3075 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3078 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3079 record_overlay_string (&overlay_heads
, str
,
3081 ? Foverlay_get (overlay
, Qafter_string
)
3083 Foverlay_get (overlay
, Qpriority
),
3085 else if (endpos
== pos
3086 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3087 record_overlay_string (&overlay_tails
, str
, Qnil
,
3088 Foverlay_get (overlay
, Qpriority
),
3091 if (overlay_tails
.used
> 1)
3092 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3094 if (overlay_heads
.used
> 1)
3095 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3097 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3102 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3104 if (total
> overlay_str_len
)
3106 overlay_str_len
= total
;
3107 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3110 p
= overlay_str_buf
;
3111 for (i
= overlay_tails
.used
; --i
>= 0;)
3114 tem
= overlay_tails
.buf
[i
].string
;
3115 nbytes
= copy_text (SDATA (tem
), p
,
3117 STRING_MULTIBYTE (tem
), multibyte
);
3120 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3123 tem
= overlay_heads
.buf
[i
].string
;
3124 nbytes
= copy_text (SDATA (tem
), p
,
3126 STRING_MULTIBYTE (tem
), multibyte
);
3128 tem
= overlay_heads
.buf
[i
].string2
;
3131 nbytes
= copy_text (SDATA (tem
), p
,
3133 STRING_MULTIBYTE (tem
), multibyte
);
3137 if (p
!= overlay_str_buf
+ total
)
3140 *pstr
= overlay_str_buf
;
3146 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3149 recenter_overlay_lists (buf
, pos
)
3153 Lisp_Object overlay
, beg
, end
;
3154 struct Lisp_Overlay
*prev
, *tail
, *next
;
3156 /* See if anything in overlays_before should move to overlays_after. */
3158 /* We don't strictly need prev in this loop; it should always be nil.
3159 But we use it for symmetry and in case that should cease to be true
3160 with some future change. */
3162 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3165 XSETMISC (overlay
, tail
);
3167 /* If the overlay is not valid, get rid of it. */
3168 if (!OVERLAY_VALID (overlay
))
3173 /* Splice the cons cell TAIL out of overlays_before. */
3177 buf
->overlays_before
= next
;
3183 beg
= OVERLAY_START (overlay
);
3184 end
= OVERLAY_END (overlay
);
3186 if (OVERLAY_POSITION (end
) > pos
)
3188 /* OVERLAY needs to be moved. */
3189 int where
= OVERLAY_POSITION (beg
);
3190 struct Lisp_Overlay
*other
, *other_prev
;
3192 /* Splice the cons cell TAIL out of overlays_before. */
3196 buf
->overlays_before
= next
;
3198 /* Search thru overlays_after for where to put it. */
3200 for (other
= buf
->overlays_after
; other
;
3201 other_prev
= other
, other
= other
->next
)
3203 Lisp_Object otherbeg
, otheroverlay
;
3205 XSETMISC (otheroverlay
, other
);
3206 eassert (OVERLAY_VALID (otheroverlay
));
3208 otherbeg
= OVERLAY_START (otheroverlay
);
3209 if (OVERLAY_POSITION (otherbeg
) >= where
)
3213 /* Add TAIL to overlays_after before OTHER. */
3216 other_prev
->next
= tail
;
3218 buf
->overlays_after
= tail
;
3222 /* We've reached the things that should stay in overlays_before.
3223 All the rest of overlays_before must end even earlier,
3228 /* See if anything in overlays_after should be in overlays_before. */
3230 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3233 XSETMISC (overlay
, tail
);
3235 /* If the overlay is not valid, get rid of it. */
3236 if (!OVERLAY_VALID (overlay
))
3241 /* Splice the cons cell TAIL out of overlays_after. */
3245 buf
->overlays_after
= next
;
3251 beg
= OVERLAY_START (overlay
);
3252 end
= OVERLAY_END (overlay
);
3254 /* Stop looking, when we know that nothing further
3255 can possibly end before POS. */
3256 if (OVERLAY_POSITION (beg
) > pos
)
3259 if (OVERLAY_POSITION (end
) <= pos
)
3261 /* OVERLAY needs to be moved. */
3262 int where
= OVERLAY_POSITION (end
);
3263 struct Lisp_Overlay
*other
, *other_prev
;
3265 /* Splice the cons cell TAIL out of overlays_after. */
3269 buf
->overlays_after
= next
;
3271 /* Search thru overlays_before for where to put it. */
3273 for (other
= buf
->overlays_before
; other
;
3274 other_prev
= other
, other
= other
->next
)
3276 Lisp_Object otherend
, otheroverlay
;
3278 XSETMISC (otheroverlay
, other
);
3279 eassert (OVERLAY_VALID (otheroverlay
));
3281 otherend
= OVERLAY_END (otheroverlay
);
3282 if (OVERLAY_POSITION (otherend
) <= where
)
3286 /* Add TAIL to overlays_before before OTHER. */
3289 other_prev
->next
= tail
;
3291 buf
->overlays_before
= tail
;
3296 buf
->overlay_center
= pos
;
3300 adjust_overlays_for_insert (pos
, length
)
3304 /* After an insertion, the lists are still sorted properly,
3305 but we may need to update the value of the overlay center. */
3306 if (current_buffer
->overlay_center
>= pos
)
3307 current_buffer
->overlay_center
+= length
;
3311 adjust_overlays_for_delete (pos
, length
)
3315 if (current_buffer
->overlay_center
< pos
)
3316 /* The deletion was to our right. No change needed; the before- and
3317 after-lists are still consistent. */
3319 else if (current_buffer
->overlay_center
> pos
+ length
)
3320 /* The deletion was to our left. We need to adjust the center value
3321 to account for the change in position, but the lists are consistent
3322 given the new value. */
3323 current_buffer
->overlay_center
-= length
;
3325 /* We're right in the middle. There might be things on the after-list
3326 that now belong on the before-list. Recentering will move them,
3327 and also update the center point. */
3328 recenter_overlay_lists (current_buffer
, pos
);
3331 /* Fix up overlays that were garbled as a result of permuting markers
3332 in the range START through END. Any overlay with at least one
3333 endpoint in this range will need to be unlinked from the overlay
3334 list and reinserted in its proper place.
3335 Such an overlay might even have negative size at this point.
3336 If so, we'll make the overlay empty. */
3338 fix_start_end_in_overlays (start
, end
)
3339 register int start
, end
;
3341 Lisp_Object overlay
;
3342 struct Lisp_Overlay
*before_list
, *after_list
;
3343 /* These are either nil, indicating that before_list or after_list
3344 should be assigned, or the cons cell the cdr of which should be
3346 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3347 /* 'Parent', likewise, indicates a cons cell or
3348 current_buffer->overlays_before or overlays_after, depending
3349 which loop we're in. */
3350 struct Lisp_Overlay
*tail
, *parent
;
3351 int startpos
, endpos
;
3353 /* This algorithm shifts links around instead of consing and GCing.
3354 The loop invariant is that before_list (resp. after_list) is a
3355 well-formed list except that its last element, the CDR of beforep
3356 (resp. afterp) if beforep (afterp) isn't nil or before_list
3357 (after_list) if it is, is still uninitialized. So it's not a bug
3358 that before_list isn't initialized, although it may look
3360 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3362 XSETMISC (overlay
, tail
);
3364 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3365 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3367 /* If the overlay is backwards, make it empty. */
3368 if (endpos
< startpos
)
3371 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3379 || (startpos
>= start
&& startpos
< end
))
3381 /* Add it to the end of the wrong list. Later on,
3382 recenter_overlay_lists will move it to the right place. */
3383 if (endpos
< current_buffer
->overlay_center
)
3388 afterp
->next
= tail
;
3396 beforep
->next
= tail
;
3400 current_buffer
->overlays_before
= tail
->next
;
3402 parent
->next
= tail
->next
;
3406 parent
= tail
, tail
= parent
->next
;
3408 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3410 XSETMISC (overlay
, tail
);
3412 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3413 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3415 /* If the overlay is backwards, make it empty. */
3416 if (endpos
< startpos
)
3419 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3423 if (startpos
>= end
)
3426 if (startpos
>= start
3427 || (endpos
>= start
&& endpos
< end
))
3429 if (endpos
< current_buffer
->overlay_center
)
3434 afterp
->next
= tail
;
3442 beforep
->next
= tail
;
3446 current_buffer
->overlays_after
= tail
->next
;
3448 parent
->next
= tail
->next
;
3452 parent
= tail
, tail
= parent
->next
;
3455 /* Splice the constructed (wrong) lists into the buffer's lists,
3456 and let the recenter function make it sane again. */
3459 beforep
->next
= current_buffer
->overlays_before
;
3460 current_buffer
->overlays_before
= before_list
;
3462 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3466 afterp
->next
= current_buffer
->overlays_after
;
3467 current_buffer
->overlays_after
= after_list
;
3469 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3472 /* We have two types of overlay: the one whose ending marker is
3473 after-insertion-marker (this is the usual case) and the one whose
3474 ending marker is before-insertion-marker. When `overlays_before'
3475 contains overlays of the latter type and the former type in this
3476 order and both overlays end at inserting position, inserting a text
3477 increases only the ending marker of the latter type, which results
3478 in incorrect ordering of `overlays_before'.
3480 This function fixes ordering of overlays in the slot
3481 `overlays_before' of the buffer *BP. Before the insertion, `point'
3482 was at PREV, and now is at POS. */
3485 fix_overlays_before (bp
, prev
, pos
)
3487 EMACS_INT prev
, pos
;
3489 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3490 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3494 /* After the insertion, the several overlays may be in incorrect
3495 order. The possibility is that, in the list `overlays_before',
3496 an overlay which ends at POS appears after an overlay which ends
3497 at PREV. Since POS is greater than PREV, we must fix the
3498 ordering of these overlays, by moving overlays ends at POS before
3499 the overlays ends at PREV. */
3501 /* At first, find a place where disordered overlays should be linked
3502 in. It is where an overlay which end before POS exists. (i.e. an
3503 overlay whose ending marker is after-insertion-marker if disorder
3506 && (XSETMISC (tem
, tail
),
3507 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3513 /* If we don't find such an overlay,
3514 or the found one ends before PREV,
3515 or the found one is the last one in the list,
3516 we don't have to fix anything. */
3517 if (!tail
|| end
< prev
|| !tail
->next
)
3520 right_pair
= parent
;
3524 /* Now, end position of overlays in the list TAIL should be before
3525 or equal to PREV. In the loop, an overlay which ends at POS is
3526 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3527 we found an overlay which ends before PREV, the remaining
3528 overlays are in correct order. */
3531 XSETMISC (tem
, tail
);
3532 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3535 { /* This overlay is disordered. */
3536 struct Lisp_Overlay
*found
= tail
;
3538 /* Unlink the found overlay. */
3540 parent
->next
= tail
;
3541 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3542 and link it into the right place. */
3545 found
->next
= bp
->overlays_before
;
3546 bp
->overlays_before
= found
;
3550 found
->next
= right_pair
->next
;
3551 right_pair
->next
= found
;
3554 else if (end
== prev
)
3559 else /* No more disordered overlay. */
3564 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3565 doc
: /* Return t if OBJECT is an overlay. */)
3569 return (OVERLAYP (object
) ? Qt
: Qnil
);
3572 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3573 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3574 If omitted, BUFFER defaults to the current buffer.
3575 BEG and END may be integers or markers.
3576 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3577 front delimiter advance when text is inserted there.
3578 The fifth arg REAR-ADVANCE, if non-nil, makes the
3579 rear delimiter advance when text is inserted there. */)
3580 (beg
, end
, buffer
, front_advance
, rear_advance
)
3581 Lisp_Object beg
, end
, buffer
;
3582 Lisp_Object front_advance
, rear_advance
;
3584 Lisp_Object overlay
;
3588 XSETBUFFER (buffer
, current_buffer
);
3590 CHECK_BUFFER (buffer
);
3592 && ! EQ (Fmarker_buffer (beg
), buffer
))
3593 error ("Marker points into wrong buffer");
3595 && ! EQ (Fmarker_buffer (end
), buffer
))
3596 error ("Marker points into wrong buffer");
3598 CHECK_NUMBER_COERCE_MARKER (beg
);
3599 CHECK_NUMBER_COERCE_MARKER (end
);
3601 if (XINT (beg
) > XINT (end
))
3604 temp
= beg
; beg
= end
; end
= temp
;
3607 b
= XBUFFER (buffer
);
3609 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3610 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3612 if (!NILP (front_advance
))
3613 XMARKER (beg
)->insertion_type
= 1;
3614 if (!NILP (rear_advance
))
3615 XMARKER (end
)->insertion_type
= 1;
3617 overlay
= allocate_misc ();
3618 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3619 XOVERLAY (overlay
)->start
= beg
;
3620 XOVERLAY (overlay
)->end
= end
;
3621 XOVERLAY (overlay
)->plist
= Qnil
;
3622 XOVERLAY (overlay
)->next
= NULL
;
3624 /* Put the new overlay on the wrong list. */
3625 end
= OVERLAY_END (overlay
);
3626 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3628 if (b
->overlays_after
)
3629 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3630 b
->overlays_after
= XOVERLAY (overlay
);
3634 if (b
->overlays_before
)
3635 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3636 b
->overlays_before
= XOVERLAY (overlay
);
3639 /* This puts it in the right list, and in the right order. */
3640 recenter_overlay_lists (b
, b
->overlay_center
);
3642 /* We don't need to redisplay the region covered by the overlay, because
3643 the overlay has no properties at the moment. */
3648 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3651 modify_overlay (buf
, start
, end
)
3653 EMACS_INT start
, end
;
3662 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3664 /* If this is a buffer not in the selected window,
3665 we must do other windows. */
3666 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3667 windows_or_buffers_changed
= 1;
3668 /* If multiple windows show this buffer, we must do other windows. */
3669 else if (buffer_shared
> 1)
3670 windows_or_buffers_changed
= 1;
3672 ++BUF_OVERLAY_MODIFF (buf
);
3676 Lisp_Object
Fdelete_overlay ();
3678 static struct Lisp_Overlay
*
3679 unchain_overlay (list
, overlay
)
3680 struct Lisp_Overlay
*list
, *overlay
;
3682 struct Lisp_Overlay
*tmp
, *prev
;
3683 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3687 prev
->next
= tmp
->next
;
3690 overlay
->next
= NULL
;
3696 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3697 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3698 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3699 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3701 (overlay
, beg
, end
, buffer
)
3702 Lisp_Object overlay
, beg
, end
, buffer
;
3704 struct buffer
*b
, *ob
;
3705 Lisp_Object obuffer
;
3706 int count
= SPECPDL_INDEX ();
3708 CHECK_OVERLAY (overlay
);
3710 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3712 XSETBUFFER (buffer
, current_buffer
);
3713 CHECK_BUFFER (buffer
);
3716 && ! EQ (Fmarker_buffer (beg
), buffer
))
3717 error ("Marker points into wrong buffer");
3719 && ! EQ (Fmarker_buffer (end
), buffer
))
3720 error ("Marker points into wrong buffer");
3722 CHECK_NUMBER_COERCE_MARKER (beg
);
3723 CHECK_NUMBER_COERCE_MARKER (end
);
3725 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3726 return Fdelete_overlay (overlay
);
3728 if (XINT (beg
) > XINT (end
))
3731 temp
= beg
; beg
= end
; end
= temp
;
3734 specbind (Qinhibit_quit
, Qt
);
3736 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3737 b
= XBUFFER (buffer
);
3738 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3740 /* If the overlay has changed buffers, do a thorough redisplay. */
3741 if (!EQ (buffer
, obuffer
))
3743 /* Redisplay where the overlay was. */
3744 if (!NILP (obuffer
))
3749 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3750 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3752 modify_overlay (ob
, o_beg
, o_end
);
3755 /* Redisplay where the overlay is going to be. */
3756 modify_overlay (b
, XINT (beg
), XINT (end
));
3759 /* Redisplay the area the overlay has just left, or just enclosed. */
3763 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3764 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3766 if (o_beg
== XINT (beg
))
3767 modify_overlay (b
, o_end
, XINT (end
));
3768 else if (o_end
== XINT (end
))
3769 modify_overlay (b
, o_beg
, XINT (beg
));
3772 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3773 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3774 modify_overlay (b
, o_beg
, o_end
);
3778 if (!NILP (obuffer
))
3781 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3783 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3784 eassert (XOVERLAY (overlay
)->next
== NULL
);
3787 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3788 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3790 /* Put the overlay on the wrong list. */
3791 end
= OVERLAY_END (overlay
);
3792 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3794 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3795 b
->overlays_after
= XOVERLAY (overlay
);
3799 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3800 b
->overlays_before
= XOVERLAY (overlay
);
3803 /* This puts it in the right list, and in the right order. */
3804 recenter_overlay_lists (b
, b
->overlay_center
);
3806 return unbind_to (count
, overlay
);
3809 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3810 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3812 Lisp_Object overlay
;
3816 int count
= SPECPDL_INDEX ();
3818 CHECK_OVERLAY (overlay
);
3820 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3824 b
= XBUFFER (buffer
);
3825 specbind (Qinhibit_quit
, Qt
);
3827 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3828 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3829 eassert (XOVERLAY (overlay
)->next
== NULL
);
3831 marker_position (OVERLAY_START (overlay
)),
3832 marker_position (OVERLAY_END (overlay
)));
3833 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3834 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3836 /* When deleting an overlay with before or after strings, turn off
3837 display optimizations for the affected buffer, on the basis that
3838 these strings may contain newlines. This is easier to do than to
3839 check for that situation during redisplay. */
3840 if (!windows_or_buffers_changed
3841 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3842 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3843 b
->prevent_redisplay_optimizations_p
= 1;
3845 return unbind_to (count
, Qnil
);
3848 /* Overlay dissection functions. */
3850 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3851 doc
: /* Return the position at which OVERLAY starts. */)
3853 Lisp_Object overlay
;
3855 CHECK_OVERLAY (overlay
);
3857 return (Fmarker_position (OVERLAY_START (overlay
)));
3860 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3861 doc
: /* Return the position at which OVERLAY ends. */)
3863 Lisp_Object overlay
;
3865 CHECK_OVERLAY (overlay
);
3867 return (Fmarker_position (OVERLAY_END (overlay
)));
3870 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3871 doc
: /* Return the buffer OVERLAY belongs to. */)
3873 Lisp_Object overlay
;
3875 CHECK_OVERLAY (overlay
);
3877 return Fmarker_buffer (OVERLAY_START (overlay
));
3880 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3881 doc
: /* Return a list of the properties on OVERLAY.
3882 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3885 Lisp_Object overlay
;
3887 CHECK_OVERLAY (overlay
);
3889 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3893 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3894 doc
: /* Return a list of the overlays that contain position POS. */)
3899 Lisp_Object
*overlay_vec
;
3903 CHECK_NUMBER_COERCE_MARKER (pos
);
3906 /* We can't use alloca here because overlays_at can call xrealloc. */
3907 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3909 /* Put all the overlays we want in a vector in overlay_vec.
3910 Store the length in len. */
3911 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3912 (int *) 0, (int *) 0, 0);
3914 /* Make a list of them all. */
3915 result
= Flist (noverlays
, overlay_vec
);
3917 xfree (overlay_vec
);
3921 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3922 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3923 Overlap means that at least one character is contained within the overlay
3924 and also contained within the specified region.
3925 Empty overlays are included in the result if they are located at BEG
3926 or between BEG and END. */)
3928 Lisp_Object beg
, end
;
3931 Lisp_Object
*overlay_vec
;
3935 CHECK_NUMBER_COERCE_MARKER (beg
);
3936 CHECK_NUMBER_COERCE_MARKER (end
);
3939 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3941 /* Put all the overlays we want in a vector in overlay_vec.
3942 Store the length in len. */
3943 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3944 (int *) 0, (int *) 0);
3946 /* Make a list of them all. */
3947 result
= Flist (noverlays
, overlay_vec
);
3949 xfree (overlay_vec
);
3953 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3955 doc
: /* Return the next position after POS where an overlay starts or ends.
3956 If there are no more overlay boundaries after POS, return (point-max). */)
3962 Lisp_Object
*overlay_vec
;
3966 CHECK_NUMBER_COERCE_MARKER (pos
);
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 endpos gets the position where the next overlay starts. */
3974 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3975 &endpos
, (int *) 0, 1);
3977 /* If any of these overlays ends before endpos,
3978 use its ending point instead. */
3979 for (i
= 0; i
< noverlays
; i
++)
3984 oend
= OVERLAY_END (overlay_vec
[i
]);
3985 oendpos
= OVERLAY_POSITION (oend
);
3986 if (oendpos
< endpos
)
3990 xfree (overlay_vec
);
3991 return make_number (endpos
);
3994 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3995 Sprevious_overlay_change
, 1, 1, 0,
3996 doc
: /* Return the previous position before POS where an overlay starts or ends.
3997 If there are no more overlay boundaries before POS, return (point-min). */)
4003 Lisp_Object
*overlay_vec
;
4006 CHECK_NUMBER_COERCE_MARKER (pos
);
4008 /* At beginning of buffer, we know the answer;
4009 avoid bug subtracting 1 below. */
4010 if (XINT (pos
) == BEGV
)
4014 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4016 /* Put all the overlays we want in a vector in overlay_vec.
4017 Store the length in len.
4018 prevpos gets the position of the previous change. */
4019 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4020 (int *) 0, &prevpos
, 1);
4022 xfree (overlay_vec
);
4023 return make_number (prevpos
);
4026 /* These functions are for debugging overlays. */
4028 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4029 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4030 The car has all the overlays before the overlay center;
4031 the cdr has all the overlays after the overlay center.
4032 Recentering overlays moves overlays between these lists.
4033 The lists you get are copies, so that changing them has no effect.
4034 However, the overlays you get are the real objects that the buffer uses. */)
4037 struct Lisp_Overlay
*ol
;
4038 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4039 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4042 before
= Fcons (tmp
, before
);
4044 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4047 after
= Fcons (tmp
, after
);
4049 return Fcons (Fnreverse (before
), Fnreverse (after
));
4052 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4053 doc
: /* Recenter the overlays of the current buffer around position POS.
4054 That makes overlay lookup faster for positions near POS (but perhaps slower
4055 for positions far away from POS). */)
4059 CHECK_NUMBER_COERCE_MARKER (pos
);
4061 recenter_overlay_lists (current_buffer
, XINT (pos
));
4065 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4066 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4068 Lisp_Object overlay
, prop
;
4070 CHECK_OVERLAY (overlay
);
4071 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4074 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4075 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4076 (overlay
, prop
, value
)
4077 Lisp_Object overlay
, prop
, value
;
4079 Lisp_Object tail
, buffer
;
4082 CHECK_OVERLAY (overlay
);
4084 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4086 for (tail
= XOVERLAY (overlay
)->plist
;
4087 CONSP (tail
) && CONSP (XCDR (tail
));
4088 tail
= XCDR (XCDR (tail
)))
4089 if (EQ (XCAR (tail
), prop
))
4091 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4092 XSETCAR (XCDR (tail
), value
);
4095 /* It wasn't in the list, so add it to the front. */
4096 changed
= !NILP (value
);
4097 XOVERLAY (overlay
)->plist
4098 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4100 if (! NILP (buffer
))
4103 modify_overlay (XBUFFER (buffer
),
4104 marker_position (OVERLAY_START (overlay
)),
4105 marker_position (OVERLAY_END (overlay
)));
4106 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4107 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4108 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4109 Fdelete_overlay (overlay
);
4114 /* Subroutine of report_overlay_modification. */
4116 /* Lisp vector holding overlay hook functions to call.
4117 Vector elements come in pairs.
4118 Each even-index element is a list of hook functions.
4119 The following odd-index element is the overlay they came from.
4121 Before the buffer change, we fill in this vector
4122 as we call overlay hook functions.
4123 After the buffer change, we get the functions to call from this vector.
4124 This way we always call the same functions before and after the change. */
4125 static Lisp_Object last_overlay_modification_hooks
;
4127 /* Number of elements actually used in last_overlay_modification_hooks. */
4128 static int last_overlay_modification_hooks_used
;
4130 /* Add one functionlist/overlay pair
4131 to the end of last_overlay_modification_hooks. */
4134 add_overlay_mod_hooklist (functionlist
, overlay
)
4135 Lisp_Object functionlist
, overlay
;
4137 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4139 if (last_overlay_modification_hooks_used
== oldsize
)
4142 old
= last_overlay_modification_hooks
;
4143 last_overlay_modification_hooks
4144 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4145 bcopy (XVECTOR (old
)->contents
,
4146 XVECTOR (last_overlay_modification_hooks
)->contents
,
4147 sizeof (Lisp_Object
) * oldsize
);
4149 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4150 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4153 /* Run the modification-hooks of overlays that include
4154 any part of the text in START to END.
4155 If this change is an insertion, also
4156 run the insert-before-hooks of overlay starting at END,
4157 and the insert-after-hooks of overlay ending at START.
4159 This is called both before and after the modification.
4160 AFTER is nonzero when we call after the modification.
4162 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4163 When AFTER is nonzero, they are the start position,
4164 the position after the inserted new text,
4165 and the length of deleted or replaced old text. */
4168 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4169 Lisp_Object start
, end
;
4171 Lisp_Object arg1
, arg2
, arg3
;
4173 Lisp_Object prop
, overlay
;
4174 struct Lisp_Overlay
*tail
;
4175 /* 1 if this change is an insertion. */
4176 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4177 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4182 /* We used to run the functions as soon as we found them and only register
4183 them in last_overlay_modification_hooks for the purpose of the `after'
4184 case. But running elisp code as we traverse the list of overlays is
4185 painful because the list can be modified by the elisp code so we had to
4186 copy at several places. We now simply do a read-only traversal that
4187 only collects the functions to run and we run them afterwards. It's
4188 simpler, especially since all the code was already there. -stef */
4192 /* We are being called before a change.
4193 Scan the overlays to find the functions to call. */
4194 last_overlay_modification_hooks_used
= 0;
4195 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4197 int startpos
, endpos
;
4198 Lisp_Object ostart
, oend
;
4200 XSETMISC (overlay
, tail
);
4202 ostart
= OVERLAY_START (overlay
);
4203 oend
= OVERLAY_END (overlay
);
4204 endpos
= OVERLAY_POSITION (oend
);
4205 if (XFASTINT (start
) > endpos
)
4207 startpos
= OVERLAY_POSITION (ostart
);
4208 if (insertion
&& (XFASTINT (start
) == startpos
4209 || XFASTINT (end
) == startpos
))
4211 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4213 add_overlay_mod_hooklist (prop
, overlay
);
4215 if (insertion
&& (XFASTINT (start
) == endpos
4216 || XFASTINT (end
) == endpos
))
4218 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4220 add_overlay_mod_hooklist (prop
, overlay
);
4222 /* Test for intersecting intervals. This does the right thing
4223 for both insertion and deletion. */
4224 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4226 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4228 add_overlay_mod_hooklist (prop
, overlay
);
4232 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4234 int startpos
, endpos
;
4235 Lisp_Object ostart
, oend
;
4237 XSETMISC (overlay
, tail
);
4239 ostart
= OVERLAY_START (overlay
);
4240 oend
= OVERLAY_END (overlay
);
4241 startpos
= OVERLAY_POSITION (ostart
);
4242 endpos
= OVERLAY_POSITION (oend
);
4243 if (XFASTINT (end
) < startpos
)
4245 if (insertion
&& (XFASTINT (start
) == startpos
4246 || XFASTINT (end
) == startpos
))
4248 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4250 add_overlay_mod_hooklist (prop
, overlay
);
4252 if (insertion
&& (XFASTINT (start
) == endpos
4253 || XFASTINT (end
) == endpos
))
4255 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4257 add_overlay_mod_hooklist (prop
, overlay
);
4259 /* Test for intersecting intervals. This does the right thing
4260 for both insertion and deletion. */
4261 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4263 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4265 add_overlay_mod_hooklist (prop
, overlay
);
4270 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4272 /* Call the functions recorded in last_overlay_modification_hooks.
4273 First copy the vector contents, in case some of these hooks
4274 do subsequent modification of the buffer. */
4275 int size
= last_overlay_modification_hooks_used
;
4276 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4279 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4280 copy
, size
* sizeof (Lisp_Object
));
4282 gcpro1
.nvars
= size
;
4284 for (i
= 0; i
< size
;)
4286 Lisp_Object prop
, overlay
;
4288 overlay
= copy
[i
++];
4289 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4296 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4297 Lisp_Object list
, overlay
;
4299 Lisp_Object arg1
, arg2
, arg3
;
4301 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4303 GCPRO4 (list
, arg1
, arg2
, arg3
);
4305 while (CONSP (list
))
4308 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4310 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4316 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4319 evaporate_overlays (pos
)
4322 Lisp_Object overlay
, hit_list
;
4323 struct Lisp_Overlay
*tail
;
4326 if (pos
<= current_buffer
->overlay_center
)
4327 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4330 XSETMISC (overlay
, tail
);
4331 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4334 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4335 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4336 hit_list
= Fcons (overlay
, hit_list
);
4339 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4342 XSETMISC (overlay
, tail
);
4343 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4346 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4347 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4348 hit_list
= Fcons (overlay
, hit_list
);
4350 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4351 Fdelete_overlay (XCAR (hit_list
));
4354 /* Somebody has tried to store a value with an unacceptable type
4355 in the slot with offset OFFSET. */
4358 buffer_slot_type_mismatch (offset
)
4364 switch (XINT (PER_BUFFER_TYPE (offset
)))
4367 type_name
= "integers";
4371 type_name
= "strings";
4375 type_name
= "symbols";
4382 sym
= PER_BUFFER_SYMBOL (offset
);
4383 error ("Only %s should be stored in the buffer-local variable %s",
4384 type_name
, SDATA (SYMBOL_NAME (sym
)));
4388 /***********************************************************************
4389 Allocation with mmap
4390 ***********************************************************************/
4392 #ifdef USE_MMAP_FOR_BUFFERS
4394 #include <sys/types.h>
4395 #include <sys/mman.h>
4398 #ifdef MAP_ANONYMOUS
4399 #define MAP_ANON MAP_ANONYMOUS
4406 #define MAP_FAILED ((void *) -1)
4419 /* Memory is allocated in regions which are mapped using mmap(2).
4420 The current implementation lets the system select mapped
4421 addresses; we're not using MAP_FIXED in general, except when
4422 trying to enlarge regions.
4424 Each mapped region starts with a mmap_region structure, the user
4425 area starts after that structure, aligned to MEM_ALIGN.
4427 +-----------------------+
4428 | struct mmap_info + |
4430 +-----------------------+
4434 +-----------------------+ */
4438 /* User-specified size. */
4439 size_t nbytes_specified
;
4441 /* Number of bytes mapped */
4442 size_t nbytes_mapped
;
4444 /* Pointer to the location holding the address of the memory
4445 allocated with the mmap'd block. The variable actually points
4446 after this structure. */
4449 /* Next and previous in list of all mmap'd regions. */
4450 struct mmap_region
*next
, *prev
;
4453 /* Doubly-linked list of mmap'd regions. */
4455 static struct mmap_region
*mmap_regions
;
4457 /* File descriptor for mmap. If we don't have anonymous mapping,
4458 /dev/zero will be opened on it. */
4462 /* Temporary storage for mmap_set_vars, see there. */
4464 static struct mmap_region
*mmap_regions_1
;
4465 static int mmap_fd_1
;
4467 /* Page size on this system. */
4469 static int mmap_page_size
;
4471 /* 1 means mmap has been intialized. */
4473 static int mmap_initialized_p
;
4475 /* Value is X rounded up to the next multiple of N. */
4477 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4479 /* Size of mmap_region structure plus padding. */
4481 #define MMAP_REGION_STRUCT_SIZE \
4482 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4484 /* Given a pointer P to the start of the user-visible part of a mapped
4485 region, return a pointer to the start of the region. */
4487 #define MMAP_REGION(P) \
4488 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4490 /* Given a pointer P to the start of a mapped region, return a pointer
4491 to the start of the user-visible part of the region. */
4493 #define MMAP_USER_AREA(P) \
4494 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4496 #define MEM_ALIGN sizeof (double)
4498 /* Predicate returning true if part of the address range [START .. END]
4499 is currently mapped. Used to prevent overwriting an existing
4502 Default is to conservativly assume the address range is occupied by
4503 something else. This can be overridden by system configuration
4504 files if system-specific means to determine this exists. */
4506 #ifndef MMAP_ALLOCATED_P
4507 #define MMAP_ALLOCATED_P(start, end) 1
4510 /* Function prototypes. */
4512 static int mmap_free_1
P_ ((struct mmap_region
*));
4513 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4514 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4515 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4516 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4517 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4518 static void mmap_init
P_ ((void));
4521 /* Return a region overlapping address range START...END, or null if
4522 none. END is not including, i.e. the last byte in the range
4525 static struct mmap_region
*
4526 mmap_find (start
, end
)
4527 POINTER_TYPE
*start
, *end
;
4529 struct mmap_region
*r
;
4530 char *s
= (char *) start
, *e
= (char *) end
;
4532 for (r
= mmap_regions
; r
; r
= r
->next
)
4534 char *rstart
= (char *) r
;
4535 char *rend
= rstart
+ r
->nbytes_mapped
;
4537 if (/* First byte of range, i.e. START, in this region? */
4538 (s
>= rstart
&& s
< rend
)
4539 /* Last byte of range, i.e. END - 1, in this region? */
4540 || (e
> rstart
&& e
<= rend
)
4541 /* First byte of this region in the range? */
4542 || (rstart
>= s
&& rstart
< e
)
4543 /* Last byte of this region in the range? */
4544 || (rend
> s
&& rend
<= e
))
4552 /* Unmap a region. P is a pointer to the start of the user-araa of
4553 the region. Value is non-zero if successful. */
4557 struct mmap_region
*r
;
4560 r
->next
->prev
= r
->prev
;
4562 r
->prev
->next
= r
->next
;
4564 mmap_regions
= r
->next
;
4566 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4568 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4576 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4577 Value is non-zero if successful. */
4580 mmap_enlarge (r
, npages
)
4581 struct mmap_region
*r
;
4584 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4590 /* Unmap pages at the end of the region. */
4591 nbytes
= - npages
* mmap_page_size
;
4592 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4593 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4596 r
->nbytes_mapped
-= nbytes
;
4600 else if (npages
> 0)
4602 nbytes
= npages
* mmap_page_size
;
4604 /* Try to map additional pages at the end of the region. We
4605 cannot do this if the address range is already occupied by
4606 something else because mmap deletes any previous mapping.
4607 I'm not sure this is worth doing, let's see. */
4608 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4612 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4613 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4614 if (p
== MAP_FAILED
)
4615 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4616 else if (p
!= (POINTER_TYPE
*) region_end
)
4618 /* Kernels are free to choose a different address. In
4619 that case, unmap what we've mapped above; we have
4621 if (munmap (p
, nbytes
) == -1)
4622 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4626 r
->nbytes_mapped
+= nbytes
;
4636 /* Set or reset variables holding references to mapped regions. If
4637 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4638 non-zero, set all variables to the start of the user-areas
4641 This function is called from Fdump_emacs to ensure that the dumped
4642 Emacs doesn't contain references to memory that won't be mapped
4643 when Emacs starts. */
4646 mmap_set_vars (restore_p
)
4649 struct mmap_region
*r
;
4653 mmap_regions
= mmap_regions_1
;
4654 mmap_fd
= mmap_fd_1
;
4655 for (r
= mmap_regions
; r
; r
= r
->next
)
4656 *r
->var
= MMAP_USER_AREA (r
);
4660 for (r
= mmap_regions
; r
; r
= r
->next
)
4662 mmap_regions_1
= mmap_regions
;
4663 mmap_regions
= NULL
;
4664 mmap_fd_1
= mmap_fd
;
4670 /* Allocate a block of storage large enough to hold NBYTES bytes of
4671 data. A pointer to the data is returned in *VAR. VAR is thus the
4672 address of some variable which will use the data area.
4674 The allocation of 0 bytes is valid.
4676 If we can't allocate the necessary memory, set *VAR to null, and
4679 static POINTER_TYPE
*
4680 mmap_alloc (var
, nbytes
)
4689 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4690 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4693 if (p
== MAP_FAILED
)
4695 if (errno
!= ENOMEM
)
4696 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4701 struct mmap_region
*r
= (struct mmap_region
*) p
;
4703 r
->nbytes_specified
= nbytes
;
4704 r
->nbytes_mapped
= map
;
4707 r
->next
= mmap_regions
;
4712 p
= MMAP_USER_AREA (p
);
4719 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4720 resize it to size NBYTES. Change *VAR to reflect the new block,
4721 and return this value. If more memory cannot be allocated, then
4722 leave *VAR unchanged, and return null. */
4724 static POINTER_TYPE
*
4725 mmap_realloc (var
, nbytes
)
4729 POINTER_TYPE
*result
;
4734 result
= mmap_alloc (var
, nbytes
);
4735 else if (nbytes
== 0)
4738 result
= mmap_alloc (var
, nbytes
);
4742 struct mmap_region
*r
= MMAP_REGION (*var
);
4743 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4748 POINTER_TYPE
*old_ptr
= *var
;
4750 /* Try to map additional pages at the end of the region.
4751 If that fails, allocate a new region, copy data
4752 from the old region, then free it. */
4753 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4756 r
->nbytes_specified
= nbytes
;
4757 *var
= result
= old_ptr
;
4759 else if (mmap_alloc (var
, nbytes
))
4761 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4762 mmap_free_1 (MMAP_REGION (old_ptr
));
4764 r
= MMAP_REGION (result
);
4765 r
->nbytes_specified
= nbytes
;
4773 else if (room
- nbytes
>= mmap_page_size
)
4775 /* Shrinking by at least a page. Let's give some
4776 memory back to the system.
4778 The extra parens are to make the division happens first,
4779 on positive values, so we know it will round towards
4781 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4783 r
->nbytes_specified
= nbytes
;
4787 /* Leave it alone. */
4789 r
->nbytes_specified
= nbytes
;
4797 /* Free a block of relocatable storage whose data is pointed to by
4798 PTR. Store 0 in *PTR to show there's no block allocated. */
4808 mmap_free_1 (MMAP_REGION (*var
));
4814 /* Perform necessary intializations for the use of mmap. */
4820 /* The value of mmap_fd is initially 0 in temacs, and -1
4821 in a dumped Emacs. */
4824 /* No anonymous mmap -- we need the file descriptor. */
4825 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4827 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4829 #endif /* MAP_ANON == 0 */
4831 if (mmap_initialized_p
)
4833 mmap_initialized_p
= 1;
4839 mmap_page_size
= getpagesize ();
4842 #endif /* USE_MMAP_FOR_BUFFERS */
4846 /***********************************************************************
4847 Buffer-text Allocation
4848 ***********************************************************************/
4851 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4852 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4853 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4854 #endif /* REL_ALLOC */
4857 /* Allocate NBYTES bytes for buffer B's text buffer. */
4860 alloc_buffer_text (b
, nbytes
)
4867 #if defined USE_MMAP_FOR_BUFFERS
4868 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4869 #elif defined REL_ALLOC
4870 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4872 p
= xmalloc (nbytes
);
4881 b
->text
->beg
= (unsigned char *) p
;
4885 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4889 enlarge_buffer_text (b
, delta
)
4894 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4897 #if defined USE_MMAP_FOR_BUFFERS
4898 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4899 #elif defined REL_ALLOC
4900 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4902 p
= xrealloc (b
->text
->beg
, nbytes
);
4911 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4916 /* Free buffer B's text buffer. */
4919 free_buffer_text (b
)
4924 #if defined USE_MMAP_FOR_BUFFERS
4925 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4926 #elif defined REL_ALLOC
4927 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4929 xfree (b
->text
->beg
);
4932 BUF_BEG_ADDR (b
) = NULL
;
4938 /***********************************************************************
4940 ***********************************************************************/
4947 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4949 /* Make sure all markable slots in buffer_defaults
4950 are initialized reasonably, so mark_buffer won't choke. */
4951 reset_buffer (&buffer_defaults
);
4952 reset_buffer_local_variables (&buffer_defaults
, 1);
4953 reset_buffer (&buffer_local_symbols
);
4954 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4955 /* Prevent GC from getting confused. */
4956 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4957 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4958 BUF_INTERVALS (&buffer_defaults
) = 0;
4959 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4960 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4961 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4963 /* Set up the default values of various buffer slots. */
4964 /* Must do these before making the first buffer! */
4966 /* real setup is done in bindings.el */
4967 buffer_defaults
.mode_line_format
= build_string ("%-");
4968 buffer_defaults
.header_line_format
= Qnil
;
4969 buffer_defaults
.abbrev_mode
= Qnil
;
4970 buffer_defaults
.overwrite_mode
= Qnil
;
4971 buffer_defaults
.case_fold_search
= Qt
;
4972 buffer_defaults
.auto_fill_function
= Qnil
;
4973 buffer_defaults
.selective_display
= Qnil
;
4975 buffer_defaults
.selective_display_ellipses
= Qt
;
4977 buffer_defaults
.abbrev_table
= Qnil
;
4978 buffer_defaults
.display_table
= Qnil
;
4979 buffer_defaults
.undo_list
= Qnil
;
4980 buffer_defaults
.mark_active
= Qnil
;
4981 buffer_defaults
.file_format
= Qnil
;
4982 buffer_defaults
.auto_save_file_format
= Qt
;
4983 buffer_defaults
.overlays_before
= NULL
;
4984 buffer_defaults
.overlays_after
= NULL
;
4985 buffer_defaults
.overlay_center
= BEG
;
4987 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4988 buffer_defaults
.truncate_lines
= Qnil
;
4989 buffer_defaults
.ctl_arrow
= Qt
;
4990 buffer_defaults
.direction_reversed
= Qnil
;
4991 buffer_defaults
.cursor_type
= Qt
;
4992 buffer_defaults
.extra_line_spacing
= Qnil
;
4995 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4997 buffer_defaults
.enable_multibyte_characters
= Qt
;
4998 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4999 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5000 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5001 buffer_defaults
.cache_long_line_scans
= Qnil
;
5002 buffer_defaults
.file_truename
= Qnil
;
5003 XSETFASTINT (buffer_defaults
.display_count
, 0);
5004 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5005 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5006 buffer_defaults
.left_fringe_width
= Qnil
;
5007 buffer_defaults
.right_fringe_width
= Qnil
;
5008 buffer_defaults
.fringes_outside_margins
= Qnil
;
5009 buffer_defaults
.scroll_bar_width
= Qnil
;
5010 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5011 buffer_defaults
.indicate_empty_lines
= Qnil
;
5012 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5013 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5014 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5015 buffer_defaults
.display_time
= Qnil
;
5017 /* Assign the local-flags to the slots that have default values.
5018 The local flag is a bit that is used in the buffer
5019 to say that it has its own local value for the slot.
5020 The local flag bits are in the local_var_flags slot of the buffer. */
5022 /* Nothing can work if this isn't true */
5023 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5025 /* 0 means not a lisp var, -1 means always local, else mask */
5026 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5027 XSETINT (buffer_local_flags
.filename
, -1);
5028 XSETINT (buffer_local_flags
.directory
, -1);
5029 XSETINT (buffer_local_flags
.backed_up
, -1);
5030 XSETINT (buffer_local_flags
.save_length
, -1);
5031 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5032 XSETINT (buffer_local_flags
.read_only
, -1);
5033 XSETINT (buffer_local_flags
.major_mode
, -1);
5034 XSETINT (buffer_local_flags
.mode_name
, -1);
5035 XSETINT (buffer_local_flags
.undo_list
, -1);
5036 XSETINT (buffer_local_flags
.mark_active
, -1);
5037 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5038 XSETINT (buffer_local_flags
.file_truename
, -1);
5039 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5040 XSETINT (buffer_local_flags
.file_format
, -1);
5041 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5042 XSETINT (buffer_local_flags
.display_count
, -1);
5043 XSETINT (buffer_local_flags
.display_time
, -1);
5044 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5047 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5048 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5049 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5050 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5051 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5052 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5054 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5056 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5057 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5058 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5059 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5060 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5061 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5062 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5064 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5065 /* Make this one a permanent local. */
5066 buffer_permanent_local_flags
[idx
++] = 1;
5068 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5069 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5070 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5071 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5072 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5073 /* Make this one a permanent local. */
5074 buffer_permanent_local_flags
[idx
++] = 1;
5075 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5076 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5077 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5078 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5079 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5080 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5081 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5082 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5083 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5084 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5085 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5086 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5087 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5088 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5090 /* Need more room? */
5091 if (idx
>= MAX_PER_BUFFER_VARS
)
5093 last_per_buffer_idx
= idx
;
5095 Vbuffer_alist
= Qnil
;
5099 QSFundamental
= build_string ("Fundamental");
5101 Qfundamental_mode
= intern ("fundamental-mode");
5102 buffer_defaults
.major_mode
= Qfundamental_mode
;
5104 Qmode_class
= intern ("mode-class");
5106 Qprotected_field
= intern ("protected-field");
5108 Qpermanent_local
= intern ("permanent-local");
5110 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5111 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5113 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5115 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5117 /* super-magic invisible buffer */
5118 Vbuffer_alist
= Qnil
;
5120 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5122 inhibit_modification_hooks
= 0;
5128 char buf
[MAXPATHLEN
+ 1];
5130 struct stat dotstat
, pwdstat
;
5134 #ifdef USE_MMAP_FOR_BUFFERS
5136 /* When using the ralloc implementation based on mmap(2), buffer
5137 text pointers will have been set to null in the dumped Emacs.
5141 for (b
= all_buffers
; b
; b
= b
->next
)
5142 if (b
->text
->beg
== NULL
)
5143 enlarge_buffer_text (b
, 0);
5145 #endif /* USE_MMAP_FOR_BUFFERS */
5147 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5148 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5149 Fset_buffer_multibyte (Qnil
);
5151 /* If PWD is accurate, use it instead of calling getwd. PWD is
5152 sometimes a nicer name, and using it may avoid a fatal error if a
5153 parent directory is searchable but not readable. */
5154 if ((pwd
= getenv ("PWD")) != 0
5155 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5156 && stat (pwd
, &pwdstat
) == 0
5157 && stat (".", &dotstat
) == 0
5158 && dotstat
.st_ino
== pwdstat
.st_ino
5159 && dotstat
.st_dev
== pwdstat
.st_dev
5160 && strlen (pwd
) < MAXPATHLEN
)
5163 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5164 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5166 else if (getwd (buf
) == 0)
5167 fatal ("`getwd' failed: %s\n", buf
);
5171 /* Maybe this should really use some standard subroutine
5172 whose definition is filename syntax dependent. */
5174 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5176 buf
[rc
] = DIRECTORY_SEP
;
5179 #endif /* not VMS */
5181 current_buffer
->directory
= build_string (buf
);
5183 /* Add /: to the front of the name
5184 if it would otherwise be treated as magic. */
5185 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5187 /* If the default dir is just /, TEMP is non-nil
5188 because of the ange-ftp completion handler.
5189 However, it is not necessary to turn / into /:/.
5190 So avoid doing that. */
5191 && strcmp ("/", SDATA (current_buffer
->directory
)))
5192 current_buffer
->directory
5193 = concat2 (build_string ("/:"), current_buffer
->directory
);
5195 temp
= get_minibuffer (0);
5196 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5199 /* initialize the buffer routines */
5203 staticpro (&last_overlay_modification_hooks
);
5204 last_overlay_modification_hooks
5205 = Fmake_vector (make_number (10), Qnil
);
5207 staticpro (&Vbuffer_defaults
);
5208 staticpro (&Vbuffer_local_symbols
);
5209 staticpro (&Qfundamental_mode
);
5210 staticpro (&Qmode_class
);
5211 staticpro (&QSFundamental
);
5212 staticpro (&Vbuffer_alist
);
5213 staticpro (&Qprotected_field
);
5214 staticpro (&Qpermanent_local
);
5215 staticpro (&Qkill_buffer_hook
);
5216 Qoverlayp
= intern ("overlayp");
5217 staticpro (&Qoverlayp
);
5218 Qevaporate
= intern ("evaporate");
5219 staticpro (&Qevaporate
);
5220 Qmodification_hooks
= intern ("modification-hooks");
5221 staticpro (&Qmodification_hooks
);
5222 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5223 staticpro (&Qinsert_in_front_hooks
);
5224 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5225 staticpro (&Qinsert_behind_hooks
);
5226 Qget_file_buffer
= intern ("get-file-buffer");
5227 staticpro (&Qget_file_buffer
);
5228 Qpriority
= intern ("priority");
5229 staticpro (&Qpriority
);
5230 Qwindow
= intern ("window");
5231 staticpro (&Qwindow
);
5232 Qbefore_string
= intern ("before-string");
5233 staticpro (&Qbefore_string
);
5234 Qafter_string
= intern ("after-string");
5235 staticpro (&Qafter_string
);
5236 Qfirst_change_hook
= intern ("first-change-hook");
5237 staticpro (&Qfirst_change_hook
);
5238 Qbefore_change_functions
= intern ("before-change-functions");
5239 staticpro (&Qbefore_change_functions
);
5240 Qafter_change_functions
= intern ("after-change-functions");
5241 staticpro (&Qafter_change_functions
);
5242 staticpro (&Qucs_set_table_for_input
);
5244 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5245 staticpro (&Qkill_buffer_query_functions
);
5247 Fput (Qprotected_field
, Qerror_conditions
,
5248 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5249 Fput (Qprotected_field
, Qerror_message
,
5250 build_string ("Attempt to modify a protected field"));
5252 /* All these use DEFVAR_LISP_NOPRO because the slots in
5253 buffer_defaults will all be marked via Vbuffer_defaults. */
5255 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5256 &buffer_defaults
.mode_line_format
,
5257 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5258 This is the same as (default-value 'mode-line-format). */);
5260 DEFVAR_LISP_NOPRO ("default-header-line-format",
5261 &buffer_defaults
.header_line_format
,
5262 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5263 This is the same as (default-value 'header-line-format). */);
5265 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5266 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5267 This is the same as (default-value 'cursor-type). */);
5269 DEFVAR_LISP_NOPRO ("default-line-spacing",
5270 &buffer_defaults
.extra_line_spacing
,
5271 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5272 This is the same as (default-value 'line-spacing). */);
5274 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5275 &buffer_defaults
.abbrev_mode
,
5276 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5277 This is the same as (default-value 'abbrev-mode). */);
5279 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5280 &buffer_defaults
.ctl_arrow
,
5281 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5282 This is the same as (default-value 'ctl-arrow). */);
5284 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5285 &buffer_defaults
.direction_reversed
,
5286 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5287 This is the same as (default-value 'direction-reversed). */);
5289 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5290 &buffer_defaults
.enable_multibyte_characters
,
5291 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5292 This is the same as (default-value 'enable-multibyte-characters). */);
5294 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5295 &buffer_defaults
.buffer_file_coding_system
,
5296 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5297 This is the same as (default-value 'buffer-file-coding-system). */);
5299 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5300 &buffer_defaults
.truncate_lines
,
5301 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5302 This is the same as (default-value 'truncate-lines). */);
5304 DEFVAR_LISP_NOPRO ("default-fill-column",
5305 &buffer_defaults
.fill_column
,
5306 doc
: /* Default value of `fill-column' for buffers that do not override it.
5307 This is the same as (default-value 'fill-column). */);
5309 DEFVAR_LISP_NOPRO ("default-left-margin",
5310 &buffer_defaults
.left_margin
,
5311 doc
: /* Default value of `left-margin' for buffers that do not override it.
5312 This is the same as (default-value 'left-margin). */);
5314 DEFVAR_LISP_NOPRO ("default-tab-width",
5315 &buffer_defaults
.tab_width
,
5316 doc
: /* Default value of `tab-width' for buffers that do not override it.
5317 This is the same as (default-value 'tab-width). */);
5319 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5320 &buffer_defaults
.case_fold_search
,
5321 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5322 This is the same as (default-value 'case-fold-search). */);
5325 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5326 &buffer_defaults
.buffer_file_type
,
5327 doc
: /* Default file type for buffers that do not override it.
5328 This is the same as (default-value 'buffer-file-type).
5329 The file type is nil for text, t for binary. */);
5332 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5333 &buffer_defaults
.left_margin_cols
,
5334 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5335 This is the same as (default-value 'left-margin-width). */);
5337 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5338 &buffer_defaults
.right_margin_cols
,
5339 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5340 This is the same as (default-value 'right-margin-width). */);
5342 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5343 &buffer_defaults
.left_fringe_width
,
5344 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5345 This is the same as (default-value 'left-fringe-width). */);
5347 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5348 &buffer_defaults
.right_fringe_width
,
5349 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5350 This is the same as (default-value 'right-fringe-width). */);
5352 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5353 &buffer_defaults
.fringes_outside_margins
,
5354 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5355 This is the same as (default-value 'fringes-outside-margins). */);
5357 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5358 &buffer_defaults
.scroll_bar_width
,
5359 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5360 This is the same as (default-value 'scroll-bar-width). */);
5362 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5363 &buffer_defaults
.vertical_scroll_bar_type
,
5364 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5365 This is the same as (default-value 'vertical-scroll-bar). */);
5367 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5368 &buffer_defaults
.indicate_empty_lines
,
5369 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5370 This is the same as (default-value 'indicate-empty-lines). */);
5372 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5373 &buffer_defaults
.indicate_buffer_boundaries
,
5374 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5375 This is the same as (default-value 'indicate-buffer-boundaries). */);
5377 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5378 &buffer_defaults
.scroll_up_aggressively
,
5379 doc
: /* Default value of `scroll-up-aggressively'.
5380 This value applies in buffers that don't have their own local values.
5381 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5383 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5384 &buffer_defaults
.scroll_down_aggressively
,
5385 doc
: /* Default value of `scroll-down-aggressively'.
5386 This value applies in buffers that don't have their own local values.
5387 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5389 DEFVAR_PER_BUFFER ("header-line-format",
5390 ¤t_buffer
->header_line_format
,
5392 doc
: /* Analogous to `mode-line-format', but controls the header line.
5393 The header line appears, optionally, at the top of a window;
5394 the mode line appears at the bottom. */);
5396 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5398 doc
: /* Template for displaying mode line for current buffer.
5399 Each buffer has its own value of this variable.
5400 Value may be nil, a string, a symbol or a list or cons cell.
5401 A value of nil means don't display a mode line.
5402 For a symbol, its value is used (but it is ignored if t or nil).
5403 A string appearing directly as the value of a symbol is processed verbatim
5404 in that the %-constructs below are not recognized.
5405 Note that unless the symbol is marked as a `risky-local-variable', all
5406 properties in any strings, as well as all :eval and :propertize forms
5407 in the value of that symbol will be ignored.
5408 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5409 is used as a mode line element. Be careful--FORM should not load any files,
5410 because that can cause an infinite recursion.
5411 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5412 with the specified properties PROPS applied.
5413 For a list whose car is a symbol, the symbol's value is taken,
5414 and if that is non-nil, the cadr of the list is processed recursively.
5415 Otherwise, the caddr of the list (if there is one) is processed.
5416 For a list whose car is a string or list, each element is processed
5417 recursively and the results are effectively concatenated.
5418 For a list whose car is an integer, the cdr of the list is processed
5419 and padded (if the number is positive) or truncated (if negative)
5420 to the width specified by that number.
5421 A string is printed verbatim in the mode line except for %-constructs:
5422 (%-constructs are allowed when the string is the entire mode-line-format
5423 or when it is found in a cons-cell or a list)
5424 %b -- print buffer name. %f -- print visited file name.
5425 %F -- print frame name.
5426 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5427 %& is like %*, but ignore read-only-ness.
5428 % means buffer is read-only and * means it is modified.
5429 For a modified read-only buffer, %* gives % and %+ gives *.
5430 %s -- print process status. %l -- print the current line number.
5431 %c -- print the current column number (this makes editing slower).
5432 To make the column number update correctly in all cases,
5433 `column-number-mode' must be non-nil.
5434 %i -- print the size of the buffer.
5435 %I -- like %i, but use k, M, G, etc., to abbreviate.
5436 %p -- print percent of buffer above top of window, or Top, Bot or All.
5437 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5438 or print Bottom or All.
5439 %m -- print the mode name.
5440 %n -- print Narrow if appropriate.
5441 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5442 %Z -- like %z, but including the end-of-line format.
5443 %[ -- print one [ for each recursive editing level. %] similar.
5444 %% -- print %. %- -- print infinitely many dashes.
5445 Decimal digits after the % specify field width to which to pad. */);
5447 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5448 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5449 nil here means use current buffer's major mode, provided it is not
5450 marked as "special".
5452 When a mode is used by default, `find-file' switches to it
5453 before it reads the contents into the buffer and before
5454 it finishes setting up the buffer. Thus, the mode and
5455 its hooks should not expect certain variables such as
5456 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5458 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5459 make_number (Lisp_Symbol
),
5460 doc
: /* Symbol for current buffer's major mode. */);
5462 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5464 doc
: /* Pretty name of current buffer's major mode (a string). */);
5466 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5467 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5469 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5471 doc
: /* *Non-nil if searches and matches should ignore case. */);
5473 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5474 make_number (Lisp_Int
),
5475 doc
: /* *Column beyond which automatic line-wrapping should happen.
5476 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5478 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5479 make_number (Lisp_Int
),
5480 doc
: /* *Column for the default indent-line-function to indent to.
5481 Linefeed indents to this column in Fundamental mode. */);
5483 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5484 make_number (Lisp_Int
),
5485 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5487 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5488 doc
: /* *Non-nil means display control chars with uparrow.
5489 A value of nil means use backslash and octal digits.
5490 This variable does not apply to characters whose display is specified
5491 in the current display table (if there is one). */);
5493 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5494 ¤t_buffer
->enable_multibyte_characters
,
5496 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5497 Otherwise they are regarded as unibyte. This affects the display,
5498 file I/O and the behavior of various editing commands.
5500 This variable is buffer-local but you cannot set it directly;
5501 use the function `set-buffer-multibyte' to change a buffer's representation.
5502 Changing its default value with `setq-default' is supported.
5503 See also variable `default-enable-multibyte-characters' and Info node
5504 `(elisp)Text Representations'. */);
5505 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5507 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5508 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5509 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5510 This variable applies to saving the buffer, and also to `write-region'
5511 and other functions that use `write-region'.
5512 It does not apply to sending output to subprocesses, however.
5514 If this is nil, the buffer is saved without any code conversion
5515 unless some coding system is specified in `file-coding-system-alist'
5516 for the buffer file.
5518 If the text to be saved cannot be encoded as specified by this variable,
5519 an alternative encoding is selected by `select-safe-coding-system', which see.
5521 The variable `coding-system-for-write', if non-nil, overrides this variable.
5523 This variable is never applied to a way of decoding a file while reading it. */);
5525 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5527 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5529 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5530 doc
: /* *Non-nil means do not display continuation lines.
5531 Instead, give each line of text just one screen line.
5533 Note that this is overridden by the variable
5534 `truncate-partial-width-windows' if that variable is non-nil
5535 and this buffer is not full-frame width. */);
5538 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5540 doc
: /* Non-nil if the visited file is a binary file.
5541 This variable is meaningful on MS-DOG and Windows NT.
5542 On those systems, it is automatically local in every buffer.
5543 On other systems, this variable is normally always nil. */);
5546 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5547 make_number (Lisp_String
),
5548 doc
: /* Name of default directory of current buffer. Should end with slash.
5549 To interactively change the default directory, use command `cd'. */);
5551 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5553 doc
: /* Function called (if non-nil) to perform auto-fill.
5554 It is called after self-inserting any character specified in
5555 the `auto-fill-chars' table.
5556 NOTE: This variable is not a hook;
5557 its value may not be a list of functions. */);
5559 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5560 make_number (Lisp_String
),
5561 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5563 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5564 make_number (Lisp_String
),
5565 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5566 The truename of a file is calculated by `file-truename'
5567 and then abbreviated with `abbreviate-file-name'. */);
5569 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5570 ¤t_buffer
->auto_save_file_name
,
5571 make_number (Lisp_String
),
5572 doc
: /* Name of file for auto-saving current buffer.
5573 If it is nil, that means don't auto-save this buffer. */);
5575 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5576 doc
: /* Non-nil if this buffer is read-only. */);
5578 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5579 doc
: /* Non-nil if this buffer's file has been backed up.
5580 Backing up is done before the first time the file is saved. */);
5582 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5583 make_number (Lisp_Int
),
5584 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5587 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5589 doc
: /* Non-nil enables selective display.
5590 An Integer N as value means display only lines
5591 that start with less than n columns of space.
5592 A value of t means that the character ^M makes itself and
5593 all the rest of the line invisible; also, when saving the buffer
5594 in a file, save the ^M as a newline. */);
5597 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5598 ¤t_buffer
->selective_display_ellipses
,
5600 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5603 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5604 doc
: /* Non-nil if self-insertion should replace existing text.
5605 The value should be one of `overwrite-mode-textual',
5606 `overwrite-mode-binary', or nil.
5607 If it is `overwrite-mode-textual', self-insertion still
5608 inserts at the end of a line, and inserts when point is before a tab,
5609 until the tab is filled in.
5610 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5612 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5614 doc
: /* Display table that controls display of the contents of current buffer.
5616 If this variable is nil, the value of `standard-display-table' is used.
5617 Each window can have its own, overriding display table, see
5618 `set-window-display-table' and `window-display-table'.
5620 The display table is a char-table created with `make-display-table'.
5621 A char-table is an array indexed by character codes. Normal array
5622 primitives `aref' and `aset' can be used to access elements of a char-table.
5624 Each of the char-table elements control how to display the corresponding
5625 text character: the element at index C in the table says how to display
5626 the character whose code is C. Each element should be a vector of
5627 characters or nil. nil means display the character in the default fashion;
5628 otherwise, the characters from the vector are delivered to the screen
5629 instead of the original character.
5631 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5632 a capital Y instead of each X character.
5634 In addition, a char-table has six extra slots to control the display of:
5636 the end of a truncated screen line (extra-slot 0, a single character);
5637 the end of a continued line (extra-slot 1, a single character);
5638 the escape character used to display character codes in octal
5639 (extra-slot 2, a single character);
5640 the character used as an arrow for control characters (extra-slot 3,
5641 a single character);
5642 the decoration indicating the presence of invisible lines (extra-slot 4,
5643 a vector of characters);
5644 the character used to draw the border between side-by-side windows
5645 (extra-slot 5, a single character).
5647 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5649 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5651 doc
: /* *Width of left marginal area for display of a buffer.
5652 A value of nil means no marginal area. */);
5654 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5656 doc
: /* *Width of right marginal area for display of a buffer.
5657 A value of nil means no marginal area. */);
5659 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5661 doc
: /* *Width of this buffer's left fringe (in pixels).
5662 A value of 0 means no left fringe is shown in this buffer's window.
5663 A value of nil means to use the left fringe width from the window's frame. */);
5665 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5667 doc
: /* *Width of this buffer's right fringe (in pixels).
5668 A value of 0 means no right fringe is shown in this buffer's window.
5669 A value of nil means to use the right fringe width from the window's frame. */);
5671 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5673 doc
: /* *Non-nil means to display fringes outside display margins.
5674 A value of nil means to display fringes between margins and buffer text. */);
5676 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5678 doc
: /* *Width of this buffer's scroll bars in pixels.
5679 A value of nil means to use the scroll bar width from the window's frame. */);
5681 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5683 doc
: /* *Position of this buffer's vertical scroll bar.
5684 A value of left or right means to place the vertical scroll bar at that side
5685 of the window; a value of nil means that this window has no vertical scroll bar.
5686 A value of t means to use the vertical scroll bar type from the window's frame. */);
5688 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5689 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5690 doc
: /* *Visually indicate empty lines after the buffer end.
5691 If non-nil, a bitmap is displayed in the left fringe of a window on
5692 window-systems. */);
5694 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5695 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5696 doc
: /* *Visually indicate buffer boundaries and scrolling.
5697 If non-nil, the first and last line of the buffer are marked in the fringe
5698 of a window on window-systems with angle bitmaps, or if the window can be
5699 scrolled, the top and bottom line of the window are marked with up and down
5702 If value is a symbol `left' or `right', both angle and arrow bitmaps
5703 are displayed in the left or right fringe, resp.
5705 If value is an alist, each element (INDICATOR . POSITION) specifies
5706 the position of one of the indicators. INDICATOR is one of `top',
5707 `bottom', `up', `down', or t, which specifies the default position,
5708 and POSITION is one of `left', `right', or nil, meaning do not show
5711 For example, ((top . left) (t . right)) places the top angle bitmap in
5712 left fringe, the bottom angle bitmap in right fringe, and both arrow
5713 bitmaps in right fringe. To show just the angle bitmaps in the left
5714 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5716 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5717 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5718 doc
: /* How far to scroll windows upward.
5719 If you move point off the bottom, the window scrolls automatically.
5720 This variable controls how far it scrolls. nil, the default,
5721 means scroll to center point. A fraction means scroll to put point
5722 that fraction of the window's height from the bottom of the window.
5723 When the value is 0.0, point goes at the bottom line, which in the simple
5724 case that you moved off with C-f means scrolling just one line. 1.0 means
5725 point goes at the top, so that in that simple case, the window
5726 window scrolls by a full window height. Meaningful values are
5727 between 0.0 and 1.0, inclusive. */);
5729 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5730 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5731 doc
: /* How far to scroll windows downward.
5732 If you move point off the top, the window scrolls automatically.
5733 This variable controls how far it scrolls. nil, the default,
5734 means scroll to center point. A fraction means scroll to put point
5735 that fraction of the window's height from the top of the window.
5736 When the value is 0.0, point goes at the top line, which in the simple
5737 case that you moved off with C-b means scrolling just one line. 1.0 means
5738 point goes at the bottom, so that in that simple case, the window
5739 window scrolls by a full window height. Meaningful values are
5740 between 0.0 and 1.0, inclusive. */);
5742 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5746 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5747 doc
: /* List of functions to call before each text change.
5748 Two arguments are passed to each function: the positions of
5749 the beginning and end of the range of old text to be changed.
5750 \(For an insertion, the beginning and end are at the same place.)
5751 No information is given about the length of the text after the change.
5753 Buffer changes made while executing the `before-change-functions'
5754 don't call any before-change or after-change functions.
5755 That's because these variables are temporarily set to nil.
5756 As a result, a hook function cannot straightforwardly alter the value of
5757 these variables. See the Emacs Lisp manual for a way of
5758 accomplishing an equivalent result by using other variables.
5760 If an unhandled error happens in running these functions,
5761 the variable's value remains nil. That prevents the error
5762 from happening repeatedly and making Emacs nonfunctional. */);
5763 Vbefore_change_functions
= Qnil
;
5765 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5766 doc
: /* List of functions to call after each text change.
5767 Three arguments are passed to each function: the positions of
5768 the beginning and end of the range of changed text,
5769 and the length in bytes of the pre-change text replaced by that range.
5770 \(For an insertion, the pre-change length is zero;
5771 for a deletion, that length is the number of bytes deleted,
5772 and the post-change beginning and end are at the same place.)
5774 Buffer changes made while executing the `after-change-functions'
5775 don't call any before-change or after-change functions.
5776 That's because these variables are temporarily set to nil.
5777 As a result, a hook function cannot straightforwardly alter the value of
5778 these variables. See the Emacs Lisp manual for a way of
5779 accomplishing an equivalent result by using other variables.
5781 If an unhandled error happens in running these functions,
5782 the variable's value remains nil. That prevents the error
5783 from happening repeatedly and making Emacs nonfunctional. */);
5784 Vafter_change_functions
= Qnil
;
5786 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5787 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5788 The functions are run using the `run-hooks' function. */);
5789 Vfirst_change_hook
= Qnil
;
5791 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5792 doc
: /* List of undo entries in current buffer.
5793 Recent changes come first; older changes follow newer.
5795 An entry (BEG . END) represents an insertion which begins at
5796 position BEG and ends at position END.
5798 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5799 from (abs POSITION). If POSITION is positive, point was at the front
5800 of the text being deleted; if negative, point was at the end.
5802 An entry (t HIGH . LOW) indicates that the buffer previously had
5803 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5804 of the visited file's modification time, as of that time. If the
5805 modification time of the most recent save is different, this entry is
5808 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5809 was modified between BEG and END. PROPERTY is the property name,
5810 and VALUE is the old value.
5812 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5813 was adjusted in position by the offset DISTANCE (an integer).
5815 An entry of the form POSITION indicates that point was at the buffer
5816 location given by the integer. Undoing an entry of this form places
5819 nil marks undo boundaries. The undo command treats the changes
5820 between two undo boundaries as a single step to be undone.
5822 If the value of the variable is t, undo information is not recorded. */);
5824 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5825 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5827 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5828 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5830 Normally, the line-motion functions work by scanning the buffer for
5831 newlines. Columnar operations (like `move-to-column' and
5832 `compute-motion') also work by scanning the buffer, summing character
5833 widths as they go. This works well for ordinary text, but if the
5834 buffer's lines are very long (say, more than 500 characters), these
5835 motion functions will take longer to execute. Emacs may also take
5836 longer to update the display.
5838 If `cache-long-line-scans' is non-nil, these motion functions cache the
5839 results of their scans, and consult the cache to avoid rescanning
5840 regions of the buffer until the text is modified. The caches are most
5841 beneficial when they prevent the most searching---that is, when the
5842 buffer contains long lines and large regions of characters with the
5843 same, fixed screen width.
5845 When `cache-long-line-scans' is non-nil, processing short lines will
5846 become slightly slower (because of the overhead of consulting the
5847 cache), and the caches will use memory roughly proportional to the
5848 number of newlines and characters whose screen width varies.
5850 The caches require no explicit maintenance; their accuracy is
5851 maintained internally by the Emacs primitives. Enabling or disabling
5852 the cache should not affect the behavior of any of the motion
5853 functions; it should only affect their performance. */);
5855 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5856 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5858 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5859 doc
: /* List of formats to use when saving this buffer.
5860 Formats are defined by `format-alist'. This variable is
5861 set when a file is visited. */);
5863 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5864 ¤t_buffer
->auto_save_file_format
, Qnil
,
5865 doc
: /* *Format in which to write auto-save files.
5866 Should be a list of symbols naming formats that are defined in `format-alist'.
5867 If it is t, which is the default, auto-save files are written in the
5868 same format as a regular save would use. */);
5870 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5871 ¤t_buffer
->invisibility_spec
, Qnil
,
5872 doc
: /* Invisibility spec of this buffer.
5873 The default is t, which means that text is invisible
5874 if it has a non-nil `invisible' property.
5875 If the value is a list, a text character is invisible if its `invisible'
5876 property is an element in that list.
5877 If an element is a cons cell of the form (PROP . ELLIPSIS),
5878 then characters with property value PROP are invisible,
5879 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5881 DEFVAR_PER_BUFFER ("buffer-display-count",
5882 ¤t_buffer
->display_count
, Qnil
,
5883 doc
: /* A number incremented each time this buffer is displayed in a window.
5884 The function `set-window-buffer' increments it. */);
5886 DEFVAR_PER_BUFFER ("buffer-display-time",
5887 ¤t_buffer
->display_time
, Qnil
,
5888 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5889 The function `set-window-buffer' updates this variable
5890 to the value obtained by calling `current-time'.
5891 If the buffer has never been shown in a window, the value is nil. */);
5893 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5894 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5895 Non-nil also enables highlighting of the region whenever the mark is active.
5896 The variable `highlight-nonselected-windows' controls whether to highlight
5897 all windows or just the selected window.
5899 If the value is `lambda', that enables Transient Mark mode temporarily
5900 until the next buffer modification. If a command sets the value to `only',
5901 that enables Transient Mark mode for the following command only.
5902 During that following command, the value of `transient-mark-mode'
5903 is `identity'. If it is still `identity' at the end of that command,
5904 it changes to nil. */);
5905 Vtransient_mark_mode
= Qnil
;
5907 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5908 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5909 If the value is t, disregard `buffer-read-only' and all `read-only'
5910 text properties. If the value is a list, disregard `buffer-read-only'
5911 and disregard a `read-only' text property if the property value
5912 is a member of the list. */);
5913 Vinhibit_read_only
= Qnil
;
5915 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5916 doc
: /* Cursor to use when this buffer is in the selected window.
5917 Values are interpreted as follows:
5919 t use the cursor specified for the frame
5920 nil don't display a cursor
5921 box display a filled box cursor
5922 hollow display a hollow box cursor
5923 bar display a vertical bar cursor with default width
5924 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5925 hbar display a horizontal bar cursor with default width
5926 (hbar . WIDTH) display a horizontal bar cursor with width WIDTH
5927 ANYTHING ELSE display a hollow box cursor.
5929 When the buffer is displayed in a nonselected window,
5930 this variable has no effect; the cursor appears as a hollow box. */);
5932 DEFVAR_PER_BUFFER ("line-spacing",
5933 ¤t_buffer
->extra_line_spacing
, Qnil
,
5934 doc
: /* Additional space to put between lines when displaying a buffer.
5935 The space is measured in pixels, and put below lines on window systems.
5936 If value is a floating point number, it specifies the spacing relative
5937 to the default frame line height. */);
5939 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5940 doc
: /* List of functions called with no args to query before killing a buffer. */);
5941 Vkill_buffer_query_functions
= Qnil
;
5943 defsubr (&Sbuffer_live_p
);
5944 defsubr (&Sbuffer_list
);
5945 defsubr (&Sget_buffer
);
5946 defsubr (&Sget_file_buffer
);
5947 defsubr (&Sget_buffer_create
);
5948 defsubr (&Smake_indirect_buffer
);
5949 defsubr (&Sgenerate_new_buffer_name
);
5950 defsubr (&Sbuffer_name
);
5951 /*defsubr (&Sbuffer_number);*/
5952 defsubr (&Sbuffer_file_name
);
5953 defsubr (&Sbuffer_base_buffer
);
5954 defsubr (&Sbuffer_local_value
);
5955 defsubr (&Sbuffer_local_variables
);
5956 defsubr (&Sbuffer_modified_p
);
5957 defsubr (&Sset_buffer_modified_p
);
5958 defsubr (&Sbuffer_modified_tick
);
5959 defsubr (&Srename_buffer
);
5960 defsubr (&Sother_buffer
);
5961 defsubr (&Sbuffer_disable_undo
);
5962 defsubr (&Sbuffer_enable_undo
);
5963 defsubr (&Skill_buffer
);
5964 defsubr (&Sset_buffer_major_mode
);
5965 defsubr (&Sswitch_to_buffer
);
5966 defsubr (&Spop_to_buffer
);
5967 defsubr (&Scurrent_buffer
);
5968 defsubr (&Sset_buffer
);
5969 defsubr (&Sbarf_if_buffer_read_only
);
5970 defsubr (&Sbury_buffer
);
5971 defsubr (&Serase_buffer
);
5972 defsubr (&Sset_buffer_multibyte
);
5973 defsubr (&Skill_all_local_variables
);
5975 defsubr (&Soverlayp
);
5976 defsubr (&Smake_overlay
);
5977 defsubr (&Sdelete_overlay
);
5978 defsubr (&Smove_overlay
);
5979 defsubr (&Soverlay_start
);
5980 defsubr (&Soverlay_end
);
5981 defsubr (&Soverlay_buffer
);
5982 defsubr (&Soverlay_properties
);
5983 defsubr (&Soverlays_at
);
5984 defsubr (&Soverlays_in
);
5985 defsubr (&Snext_overlay_change
);
5986 defsubr (&Sprevious_overlay_change
);
5987 defsubr (&Soverlay_recenter
);
5988 defsubr (&Soverlay_lists
);
5989 defsubr (&Soverlay_get
);
5990 defsubr (&Soverlay_put
);
5991 defsubr (&Srestore_buffer_modified_p
);
5997 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5998 initial_define_key (control_x_map
, 'k', "kill-buffer");
6000 /* This must not be in syms_of_buffer, because Qdisabled is not
6001 initialized when that function gets called. */
6002 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
6005 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6006 (do not change this comment) */