1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 89, 93, 94, 95, 97, 98, 99,
3 2000, 01, 02, 03, 04, 2005 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1 [probably SunOS? -stef] , param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
44 #include "intervals.h"
49 #include "region-cache.h"
51 #include "blockinput.h"
56 struct buffer
*current_buffer
; /* the current buffer */
58 /* First buffer in chain of all buffers (in reverse order of creation).
59 Threaded through ->next. */
61 struct buffer
*all_buffers
;
63 /* This structure holds the default values of the buffer-local variables
64 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
65 The default value occupies the same slot in this structure
66 as an individual buffer's value occupies in that buffer.
67 Setting the default value also goes through the alist of buffers
68 and stores into each buffer that does not say it has a local value. */
70 DECL_ALIGN (struct buffer
, buffer_defaults
);
72 /* A Lisp_Object pointer to the above, used for staticpro */
74 static Lisp_Object Vbuffer_defaults
;
76 /* This structure marks which slots in a buffer have corresponding
77 default values in buffer_defaults.
78 Each such slot has a nonzero value in this structure.
79 The value has only one nonzero bit.
81 When a buffer has its own local value for a slot,
82 the entry for that slot (found in the same slot in this structure)
83 is turned on in the buffer's local_flags array.
85 If a slot in this structure is -1, then even though there may
86 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
87 and the corresponding slot in buffer_defaults is not used.
89 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
90 but there is a default value which is copied into each buffer.
92 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
93 zero, that is a bug */
95 struct buffer buffer_local_flags
;
97 /* This structure holds the names of symbols whose values may be
98 buffer-local. It is indexed and accessed in the same way as the above. */
100 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
102 /* A Lisp_Object pointer to the above, used for staticpro */
103 static Lisp_Object Vbuffer_local_symbols
;
105 /* This structure holds the required types for the values in the
106 buffer-local slots. If a slot contains Qnil, then the
107 corresponding buffer slot may contain a value of any type. If a
108 slot contains an integer, then prospective values' tags must be
109 equal to that integer (except nil is always allowed).
110 When a tag does not match, the function
111 buffer_slot_type_mismatch will signal an error.
113 If a slot here contains -1, the corresponding variable is read-only. */
114 struct buffer buffer_local_types
;
116 /* Flags indicating which built-in buffer-local variables
117 are permanent locals. */
118 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
120 /* Number of per-buffer variables used. */
122 int last_per_buffer_idx
;
124 Lisp_Object
Fset_buffer ();
125 void set_buffer_internal ();
126 void set_buffer_internal_1 ();
127 static void call_overlay_mod_hooks ();
128 static void swap_out_buffer_local_variables ();
129 static void reset_buffer_local_variables ();
131 /* Alist of all buffer names vs the buffers. */
132 /* This used to be a variable, but is no longer,
133 to prevent lossage due to user rplac'ing this alist or its elements. */
134 Lisp_Object Vbuffer_alist
;
136 /* Functions to call before and after each text change. */
137 Lisp_Object Vbefore_change_functions
;
138 Lisp_Object Vafter_change_functions
;
140 Lisp_Object Vtransient_mark_mode
;
142 /* t means ignore all read-only text properties.
143 A list means ignore such a property if its value is a member of the list.
144 Any non-nil value means ignore buffer-read-only. */
145 Lisp_Object Vinhibit_read_only
;
147 /* List of functions to call that can query about killing a buffer.
148 If any of these functions returns nil, we don't kill it. */
149 Lisp_Object Vkill_buffer_query_functions
;
150 Lisp_Object Qkill_buffer_query_functions
;
152 /* List of functions to call before changing an unmodified buffer. */
153 Lisp_Object Vfirst_change_hook
;
155 Lisp_Object Qfirst_change_hook
;
156 Lisp_Object Qbefore_change_functions
;
157 Lisp_Object Qafter_change_functions
;
158 Lisp_Object Qucs_set_table_for_input
;
160 /* If nonzero, all modification hooks are suppressed. */
161 int inhibit_modification_hooks
;
163 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
165 Lisp_Object Qprotected_field
;
167 Lisp_Object QSFundamental
; /* A string "Fundamental" */
169 Lisp_Object Qkill_buffer_hook
;
171 Lisp_Object Qget_file_buffer
;
173 Lisp_Object Qoverlayp
;
175 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
177 Lisp_Object Qmodification_hooks
;
178 Lisp_Object Qinsert_in_front_hooks
;
179 Lisp_Object Qinsert_behind_hooks
;
181 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
182 static void free_buffer_text
P_ ((struct buffer
*b
));
183 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
184 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
185 static Lisp_Object buffer_lisp_local_variables
P_ ((struct buffer
*));
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 /* Get (a copy of) the alist of Lisp-level local variables of FROM
520 and install that in TO. */
521 to
->local_var_alist
= buffer_lisp_local_variables (from
);
524 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
526 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
527 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
528 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
529 NAME should be a string which is not the name of an existing buffer.
530 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
531 such as major and minor modes, in the indirect buffer.
532 CLONE nil means the indirect buffer's state is reset to default values. */)
533 (base_buffer
, name
, clone
)
534 Lisp_Object base_buffer
, name
, clone
;
536 Lisp_Object buf
, tem
;
540 buf
= Fget_buffer (name
);
542 error ("Buffer name `%s' is in use", SDATA (name
));
545 base_buffer
= Fget_buffer (base_buffer
);
546 if (NILP (base_buffer
))
547 error ("No such buffer: `%s'", SDATA (tem
));
548 if (NILP (XBUFFER (base_buffer
)->name
))
549 error ("Base buffer has been killed");
551 if (SCHARS (name
) == 0)
552 error ("Empty string for buffer name is not allowed");
554 b
= (struct buffer
*) allocate_buffer ();
555 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
557 if (XBUFFER (base_buffer
)->base_buffer
)
558 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
560 b
->base_buffer
= XBUFFER (base_buffer
);
562 /* Use the base buffer's text object. */
563 b
->text
= b
->base_buffer
->text
;
565 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
566 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
567 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
568 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
569 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
570 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
572 b
->newline_cache
= 0;
573 b
->width_run_cache
= 0;
574 b
->width_table
= Qnil
;
576 /* Put this on the chain of all buffers including killed ones. */
577 b
->next
= all_buffers
;
580 name
= Fcopy_sequence (name
);
581 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
585 reset_buffer_local_variables (b
, 1);
587 /* Put this in the alist of all live buffers. */
589 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
591 b
->mark
= Fmake_marker ();
594 /* The multibyte status belongs to the base buffer. */
595 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
597 /* Make sure the base buffer has markers for its narrowing. */
598 if (NILP (b
->base_buffer
->pt_marker
))
600 b
->base_buffer
->pt_marker
= Fmake_marker ();
601 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
602 BUF_PT (b
->base_buffer
),
603 BUF_PT_BYTE (b
->base_buffer
));
605 if (NILP (b
->base_buffer
->begv_marker
))
607 b
->base_buffer
->begv_marker
= Fmake_marker ();
608 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
609 BUF_BEGV (b
->base_buffer
),
610 BUF_BEGV_BYTE (b
->base_buffer
));
612 if (NILP (b
->base_buffer
->zv_marker
))
614 b
->base_buffer
->zv_marker
= Fmake_marker ();
615 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
616 BUF_ZV (b
->base_buffer
),
617 BUF_ZV_BYTE (b
->base_buffer
));
618 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
623 /* Give the indirect buffer markers for its narrowing. */
624 b
->pt_marker
= Fmake_marker ();
625 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
626 b
->begv_marker
= Fmake_marker ();
627 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
628 b
->zv_marker
= Fmake_marker ();
629 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
630 XMARKER (b
->zv_marker
)->insertion_type
= 1;
633 clone_per_buffer_values (b
->base_buffer
, b
);
639 delete_all_overlays (b
)
644 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
645 have to empty the list, otherwise we end up with overlays that
646 think they belong to this buffer while the buffer doesn't know about
648 while (b
->overlays_before
)
650 XSETMISC (overlay
, b
->overlays_before
);
651 Fdelete_overlay (overlay
);
653 while (b
->overlays_after
)
655 XSETMISC (overlay
, b
->overlays_after
);
656 Fdelete_overlay (overlay
);
658 eassert (b
->overlays_before
== NULL
);
659 eassert (b
->overlays_after
== NULL
);
662 /* Reinitialize everything about a buffer except its name and contents
664 If called on an already-initialized buffer, the list of overlays
665 should be deleted before calling this function, otherwise we end up
666 with overlays that claim to belong to the buffer but the buffer
667 claims it doesn't belong to it. */
671 register struct buffer
*b
;
674 b
->file_truename
= Qnil
;
675 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
677 XSETFASTINT (b
->save_length
, 0);
678 b
->last_window_start
= 1;
679 /* It is more conservative to start out "changed" than "unchanged". */
681 b
->prevent_redisplay_optimizations_p
= 1;
683 b
->auto_save_modified
= 0;
684 b
->auto_save_failure_time
= -1;
685 b
->auto_save_file_name
= Qnil
;
687 b
->overlays_before
= NULL
;
688 b
->overlays_after
= NULL
;
689 b
->overlay_center
= BEG
;
690 b
->mark_active
= Qnil
;
691 b
->point_before_scroll
= Qnil
;
692 b
->file_format
= Qnil
;
693 b
->auto_save_file_format
= Qt
;
694 b
->last_selected_window
= Qnil
;
695 XSETINT (b
->display_count
, 0);
696 b
->display_time
= Qnil
;
697 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
698 b
->cursor_type
= buffer_defaults
.cursor_type
;
699 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
701 b
->display_error_modiff
= 0;
704 /* Reset buffer B's local variables info.
705 Don't use this on a buffer that has already been in use;
706 it does not treat permanent locals consistently.
707 Instead, use Fkill_all_local_variables.
709 If PERMANENT_TOO is 1, then we reset permanent built-in
710 buffer-local variables. If PERMANENT_TOO is 0,
711 we preserve those. */
714 reset_buffer_local_variables (b
, permanent_too
)
715 register struct buffer
*b
;
721 /* Reset the major mode to Fundamental, together with all the
722 things that depend on the major mode.
723 default-major-mode is handled at a higher level.
724 We ignore it here. */
725 b
->major_mode
= Qfundamental_mode
;
727 b
->mode_name
= QSFundamental
;
728 b
->minor_modes
= Qnil
;
730 /* If the standard case table has been altered and invalidated,
731 fix up its insides first. */
732 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
733 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
734 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
735 Fset_standard_case_table (Vascii_downcase_table
);
737 b
->downcase_table
= Vascii_downcase_table
;
738 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
739 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
740 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
741 b
->invisibility_spec
= Qt
;
743 b
->buffer_file_type
= Qnil
;
746 /* Reset all (or most) per-buffer variables to their defaults. */
747 b
->local_var_alist
= Qnil
;
748 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
749 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
750 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
752 /* For each slot that has a default value,
753 copy that into the slot. */
755 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
757 offset
+= sizeof (Lisp_Object
))
759 int idx
= PER_BUFFER_IDX (offset
);
762 || buffer_permanent_local_flags
[idx
] == 0))
763 /* Is -2 used anywhere? */
765 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
769 /* We split this away from generate-new-buffer, because rename-buffer
770 and set-visited-file-name ought to be able to use this to really
771 rename the buffer properly. */
773 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
775 doc
: /* Return a string that is the name of no existing buffer based on NAME.
776 If there is no live buffer named NAME, then return NAME.
777 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
778 \(starting at 2) until an unused name is found, and then return that name.
779 Optional second argument IGNORE specifies a name that is okay to use
780 \(if it is in the sequence to be tried)
781 even if a buffer with that name exists. */)
783 register Lisp_Object name
, ignore
;
785 register Lisp_Object gentemp
, tem
;
791 tem
= Fstring_equal (name
, ignore
);
794 tem
= Fget_buffer (name
);
801 sprintf (number
, "<%d>", ++count
);
802 gentemp
= concat2 (name
, build_string (number
));
803 tem
= Fstring_equal (gentemp
, ignore
);
806 tem
= Fget_buffer (gentemp
);
813 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
814 doc
: /* Return the name of BUFFER, as a string.
815 With no argument or nil as argument, return the name of the current buffer. */)
817 register Lisp_Object buffer
;
820 return current_buffer
->name
;
821 CHECK_BUFFER (buffer
);
822 return XBUFFER (buffer
)->name
;
825 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
826 doc
: /* Return name of file BUFFER is visiting, or nil if none.
827 No argument or nil as argument means use the current buffer. */)
829 register Lisp_Object buffer
;
832 return current_buffer
->filename
;
833 CHECK_BUFFER (buffer
);
834 return XBUFFER (buffer
)->filename
;
837 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
839 doc
: /* Return the base buffer of indirect buffer BUFFER.
840 If BUFFER is not indirect, return nil.
841 BUFFER defaults to the current buffer. */)
843 register Lisp_Object buffer
;
846 Lisp_Object base_buffer
;
849 base
= current_buffer
->base_buffer
;
852 CHECK_BUFFER (buffer
);
853 base
= XBUFFER (buffer
)->base_buffer
;
858 XSETBUFFER (base_buffer
, base
);
862 DEFUN ("buffer-local-value", Fbuffer_local_value
,
863 Sbuffer_local_value
, 2, 2, 0,
864 doc
: /* Return the value of VARIABLE in BUFFER.
865 If VARIABLE does not have a buffer-local binding in BUFFER, the value
866 is the default binding of variable. */)
868 register Lisp_Object symbol
;
869 register Lisp_Object buffer
;
871 register struct buffer
*buf
;
872 register Lisp_Object result
;
874 CHECK_SYMBOL (symbol
);
875 CHECK_BUFFER (buffer
);
876 buf
= XBUFFER (buffer
);
878 /* Look in local_var_list */
879 result
= Fassoc (symbol
, buf
->local_var_alist
);
885 /* Look in special slots */
886 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
887 offset
< sizeof (struct buffer
);
888 /* sizeof EMACS_INT == sizeof Lisp_Object */
889 offset
+= (sizeof (EMACS_INT
)))
891 idx
= PER_BUFFER_IDX (offset
);
892 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
893 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
894 && EQ (PER_BUFFER_SYMBOL (offset
), symbol
))
896 result
= PER_BUFFER_VALUE (buf
, offset
);
903 result
= Fdefault_value (symbol
);
907 Lisp_Object valcontents
;
908 Lisp_Object current_alist_element
;
910 /* What binding is loaded right now? */
911 valcontents
= SYMBOL_VALUE (symbol
);
912 current_alist_element
913 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
915 /* The value of the currently loaded binding is not
916 stored in it, but rather in the realvalue slot.
917 Store that value into the binding it belongs to
918 in case that is the one we are about to use. */
920 Fsetcdr (current_alist_element
,
921 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
923 /* Now get the (perhaps updated) value out of the binding. */
924 result
= XCDR (result
);
927 if (EQ (result
, Qunbound
))
928 return Fsignal (Qvoid_variable
, Fcons (symbol
, Qnil
));
933 /* Return an alist of the Lisp-level buffer-local bindings of
934 buffer BUF. That is, do't include the variables maintained
935 in special slots in the buffer object. */
938 buffer_lisp_local_variables (buf
)
941 Lisp_Object result
= Qnil
;
942 register Lisp_Object tail
;
943 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
945 Lisp_Object val
, elt
;
949 /* Reference each variable in the alist in buf.
950 If inquiring about the current buffer, this gets the current values,
951 so store them into the alist so the alist is up to date.
952 If inquiring about some other buffer, this swaps out any values
953 for that buffer, making the alist up to date automatically. */
954 val
= find_symbol_value (XCAR (elt
));
955 /* Use the current buffer value only if buf is the current buffer. */
956 if (buf
!= current_buffer
)
959 /* If symbol is unbound, put just the symbol in the list. */
960 if (EQ (val
, Qunbound
))
961 result
= Fcons (XCAR (elt
), result
);
962 /* Otherwise, put (symbol . value) in the list. */
964 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
970 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
971 Sbuffer_local_variables
, 0, 1, 0,
972 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
973 Most elements look like (SYMBOL . VALUE), describing one variable.
974 For a symbol that is locally unbound, just the symbol appears in the value.
975 Note that storing new VALUEs in these elements doesn't change the variables.
976 No argument or nil as argument means use current buffer as BUFFER. */)
978 register Lisp_Object buffer
;
980 register struct buffer
*buf
;
981 register Lisp_Object result
;
984 buf
= current_buffer
;
987 CHECK_BUFFER (buffer
);
988 buf
= XBUFFER (buffer
);
991 result
= buffer_lisp_local_variables (buf
);
993 /* Add on all the variables stored in special slots. */
997 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
998 offset
< sizeof (struct buffer
);
999 /* sizeof EMACS_INT == sizeof Lisp_Object */
1000 offset
+= (sizeof (EMACS_INT
)))
1002 idx
= PER_BUFFER_IDX (offset
);
1003 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1004 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1005 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1006 PER_BUFFER_VALUE (buf
, offset
)),
1014 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1016 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1017 No argument or nil as argument means use current buffer as BUFFER. */)
1019 register Lisp_Object buffer
;
1021 register struct buffer
*buf
;
1023 buf
= current_buffer
;
1026 CHECK_BUFFER (buffer
);
1027 buf
= XBUFFER (buffer
);
1030 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1033 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1035 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1036 A non-nil FLAG means mark the buffer modified. */)
1038 register Lisp_Object flag
;
1040 register int already
;
1041 register Lisp_Object fn
;
1042 Lisp_Object buffer
, window
;
1044 #ifdef CLASH_DETECTION
1045 /* If buffer becoming modified, lock the file.
1046 If buffer becoming unmodified, unlock the file. */
1048 fn
= current_buffer
->file_truename
;
1049 /* Test buffer-file-name so that binding it to nil is effective. */
1050 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1052 already
= SAVE_MODIFF
< MODIFF
;
1053 if (!already
&& !NILP (flag
))
1055 else if (already
&& NILP (flag
))
1058 #endif /* CLASH_DETECTION */
1060 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1062 /* Set update_mode_lines only if buffer is displayed in some window.
1063 Packages like jit-lock or lazy-lock preserve a buffer's modified
1064 state by recording/restoring the state around blocks of code.
1065 Setting update_mode_lines makes redisplay consider all windows
1066 (on all frames). Stealth fontification of buffers not displayed
1067 would incur additional redisplay costs if we'd set
1068 update_modes_lines unconditionally.
1070 Ideally, I think there should be another mechanism for fontifying
1071 buffers without "modifying" buffers, or redisplay should be
1072 smarter about updating the `*' in mode lines. --gerd */
1073 XSETBUFFER (buffer
, current_buffer
);
1074 window
= Fget_buffer_window (buffer
, Qt
);
1075 if (WINDOWP (window
))
1077 ++update_mode_lines
;
1078 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1084 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1085 Srestore_buffer_modified_p
, 1, 1, 0,
1086 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1087 It is not ensured that mode lines will be updated to show the modified
1088 state of the current buffer. Use with care. */)
1092 #ifdef CLASH_DETECTION
1095 /* If buffer becoming modified, lock the file.
1096 If buffer becoming unmodified, unlock the file. */
1098 fn
= current_buffer
->file_truename
;
1099 /* Test buffer-file-name so that binding it to nil is effective. */
1100 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1102 int already
= SAVE_MODIFF
< MODIFF
;
1103 if (!already
&& !NILP (flag
))
1105 else if (already
&& NILP (flag
))
1108 #endif /* CLASH_DETECTION */
1110 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1114 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1116 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1117 Each buffer has a tick counter which is incremented each time the text in
1118 that buffer is changed. It wraps around occasionally.
1119 No argument or nil as argument means use current buffer as BUFFER. */)
1121 register Lisp_Object buffer
;
1123 register struct buffer
*buf
;
1125 buf
= current_buffer
;
1128 CHECK_BUFFER (buffer
);
1129 buf
= XBUFFER (buffer
);
1132 return make_number (BUF_MODIFF (buf
));
1135 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1136 "sRename buffer (to new name): \nP",
1137 doc
: /* Change current buffer's name to NEWNAME (a string).
1138 If second arg UNIQUE is nil or omitted, it is an error if a
1139 buffer named NEWNAME already exists.
1140 If UNIQUE is non-nil, come up with a new name using
1141 `generate-new-buffer-name'.
1142 Interactively, you can set UNIQUE with a prefix argument.
1143 We return the name we actually gave the buffer.
1144 This does not change the name of the visited file (if any). */)
1146 register Lisp_Object newname
, unique
;
1148 register Lisp_Object tem
, buf
;
1150 CHECK_STRING (newname
);
1152 if (SCHARS (newname
) == 0)
1153 error ("Empty string is invalid as a buffer name");
1155 tem
= Fget_buffer (newname
);
1158 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1159 rename the buffer automatically so you can create another
1160 with the original name. It makes UNIQUE equivalent to
1161 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1162 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1163 return current_buffer
->name
;
1165 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1167 error ("Buffer name `%s' is in use", SDATA (newname
));
1170 current_buffer
->name
= newname
;
1172 /* Catch redisplay's attention. Unless we do this, the mode lines for
1173 any windows displaying current_buffer will stay unchanged. */
1174 update_mode_lines
++;
1176 XSETBUFFER (buf
, current_buffer
);
1177 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1178 if (NILP (current_buffer
->filename
)
1179 && !NILP (current_buffer
->auto_save_file_name
))
1180 call0 (intern ("rename-auto-save-file"));
1181 /* Refetch since that last call may have done GC. */
1182 return current_buffer
->name
;
1185 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1186 doc
: /* Return most recently selected buffer other than BUFFER.
1187 Buffers not visible in windows are preferred to visible buffers,
1188 unless optional second argument VISIBLE-OK is non-nil.
1189 If the optional third argument FRAME is non-nil, use that frame's
1190 buffer list instead of the selected frame's buffer list.
1191 If no other buffer exists, the buffer `*scratch*' is returned.
1192 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1193 (buffer
, visible_ok
, frame
)
1194 register Lisp_Object buffer
, visible_ok
, frame
;
1196 Lisp_Object
Fset_buffer_major_mode ();
1197 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1201 frame
= selected_frame
;
1203 tail
= Vbuffer_alist
;
1204 pred
= frame_buffer_predicate (frame
);
1206 /* Consider buffers that have been seen in the selected frame
1207 before other buffers. */
1209 tem
= frame_buffer_list (frame
);
1213 if (BUFFERP (XCAR (tem
)))
1214 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1217 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1219 for (; CONSP (tail
); tail
= XCDR (tail
))
1221 buf
= Fcdr (XCAR (tail
));
1222 if (EQ (buf
, buffer
))
1226 if (NILP (XBUFFER (buf
)->name
))
1228 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1230 /* If the selected frame has a buffer_predicate,
1231 disregard buffers that don't fit the predicate. */
1234 tem
= call1 (pred
, buf
);
1239 if (NILP (visible_ok
))
1240 tem
= Fget_buffer_window (buf
, Qvisible
);
1245 if (NILP (notsogood
))
1248 if (!NILP (notsogood
))
1250 buf
= Fget_buffer (build_string ("*scratch*"));
1253 buf
= Fget_buffer_create (build_string ("*scratch*"));
1254 Fset_buffer_major_mode (buf
);
1259 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1261 doc
: /* Start keeping undo information for buffer BUFFER.
1262 No argument or nil as argument means do this for the current buffer. */)
1264 register Lisp_Object buffer
;
1266 Lisp_Object real_buffer
;
1269 XSETBUFFER (real_buffer
, current_buffer
);
1272 real_buffer
= Fget_buffer (buffer
);
1273 if (NILP (real_buffer
))
1277 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1278 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1284 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1285 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1286 The buffer being killed will be current while the hook is running.\n\
1289 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1290 doc
: /* Kill the buffer BUFFER.
1291 The argument may be a buffer or may be the name of a buffer.
1292 An argument of nil means kill the current buffer.
1294 Value is t if the buffer is actually killed, nil if user says no.
1296 The value of `kill-buffer-hook' (which may be local to that buffer),
1297 if not void, is a list of functions to be called, with no arguments,
1298 before the buffer is actually killed. The buffer to be killed is current
1299 when the hook functions are called.
1301 Any processes that have this buffer as the `process-buffer' are killed
1307 register struct buffer
*b
;
1308 register Lisp_Object tem
;
1309 register struct Lisp_Marker
*m
;
1310 struct gcpro gcpro1
;
1313 buf
= Fcurrent_buffer ();
1315 buf
= Fget_buffer (buffer
);
1321 /* Avoid trouble for buffer already dead. */
1325 /* Query if the buffer is still modified. */
1326 if (INTERACTIVE
&& !NILP (b
->filename
)
1327 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1330 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1331 b
->name
, make_number (0)));
1337 /* Run hooks with the buffer to be killed the current buffer. */
1339 int count
= SPECPDL_INDEX ();
1340 Lisp_Object arglist
[1];
1342 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1343 set_buffer_internal (b
);
1345 /* First run the query functions; if any query is answered no,
1346 don't kill the buffer. */
1347 arglist
[0] = Qkill_buffer_query_functions
;
1348 if (NILP (Frun_hook_with_args_until_failure (1, arglist
)))
1349 return unbind_to (count
, Qnil
);
1351 /* Then run the hooks. */
1352 Frun_hooks (1, &Qkill_buffer_hook
);
1353 unbind_to (count
, Qnil
);
1356 /* We have no more questions to ask. Verify that it is valid
1357 to kill the buffer. This must be done after the questions
1358 since anything can happen within do_yes_or_no_p. */
1360 /* Don't kill the minibuffer now current. */
1361 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1367 /* When we kill a base buffer, kill all its indirect buffers.
1368 We do it at this stage so nothing terrible happens if they
1369 ask questions or their hooks get errors. */
1370 if (! b
->base_buffer
)
1372 struct buffer
*other
;
1376 for (other
= all_buffers
; other
; other
= other
->next
)
1377 /* all_buffers contains dead buffers too;
1378 don't re-kill them. */
1379 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1382 XSETBUFFER (buf
, other
);
1389 /* Make this buffer not be current.
1390 In the process, notice if this is the sole visible buffer
1391 and give up if so. */
1392 if (b
== current_buffer
)
1394 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1396 if (b
== current_buffer
)
1400 /* Notice if the buffer to kill is the sole visible buffer
1401 when we're currently in the mini-buffer, and give up if so. */
1402 XSETBUFFER (tem
, current_buffer
);
1403 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1405 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1410 /* Now there is no question: we can kill the buffer. */
1412 #ifdef CLASH_DETECTION
1413 /* Unlock this buffer's file, if it is locked. */
1415 #endif /* CLASH_DETECTION */
1417 kill_buffer_processes (buf
);
1418 clear_charpos_cache (b
);
1420 tem
= Vinhibit_quit
;
1422 replace_buffer_in_all_windows (buf
);
1423 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1424 frames_discard_buffer (buf
);
1425 Vinhibit_quit
= tem
;
1427 /* Delete any auto-save file, if we saved it in this session.
1428 But not if the buffer is modified. */
1429 if (STRINGP (b
->auto_save_file_name
)
1430 && b
->auto_save_modified
!= 0
1431 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1432 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1433 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1436 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1438 internal_delete_file (b
->auto_save_file_name
);
1443 /* Unchain all markers that belong to this indirect buffer.
1444 Don't unchain the markers that belong to the base buffer
1445 or its other indirect buffers. */
1446 for (m
= BUF_MARKERS (b
); m
; )
1448 struct Lisp_Marker
*next
= m
->next
;
1456 /* Unchain all markers of this buffer and its indirect buffers.
1457 and leave them pointing nowhere. */
1458 for (m
= BUF_MARKERS (b
); m
; )
1460 struct Lisp_Marker
*next
= m
->next
;
1465 BUF_MARKERS (b
) = NULL
;
1466 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1468 /* Perhaps we should explicitly free the interval tree here... */
1471 /* Reset the local variables, so that this buffer's local values
1472 won't be protected from GC. They would be protected
1473 if they happened to remain encached in their symbols.
1474 This gets rid of them for certain. */
1475 swap_out_buffer_local_variables (b
);
1476 reset_buffer_local_variables (b
, 1);
1481 if (! b
->base_buffer
)
1482 free_buffer_text (b
);
1484 if (b
->newline_cache
)
1486 free_region_cache (b
->newline_cache
);
1487 b
->newline_cache
= 0;
1489 if (b
->width_run_cache
)
1491 free_region_cache (b
->width_run_cache
);
1492 b
->width_run_cache
= 0;
1494 b
->width_table
= Qnil
;
1496 b
->undo_list
= Qnil
;
1501 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1502 we do this each time BUF is selected visibly, the more recently
1503 selected buffers are always closer to the front of the list. This
1504 means that other_buffer is more likely to choose a relevant buffer. */
1510 register Lisp_Object link
, prev
;
1512 frame
= selected_frame
;
1515 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1517 if (EQ (XCDR (XCAR (link
)), buf
))
1522 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1523 we cannot use Fdelq itself here because it allows quitting. */
1526 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1528 XSETCDR (prev
, XCDR (XCDR (prev
)));
1530 XSETCDR (link
, Vbuffer_alist
);
1531 Vbuffer_alist
= link
;
1533 /* Now move this buffer to the front of frame_buffer_list also. */
1536 for (link
= frame_buffer_list (frame
); CONSP (link
);
1539 if (EQ (XCAR (link
), buf
))
1544 /* Effectively do delq. */
1549 set_frame_buffer_list (frame
,
1550 XCDR (frame_buffer_list (frame
)));
1552 XSETCDR (prev
, XCDR (XCDR (prev
)));
1554 XSETCDR (link
, frame_buffer_list (frame
));
1555 set_frame_buffer_list (frame
, link
);
1558 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1561 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1562 doc
: /* Set an appropriate major mode for BUFFER.
1563 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1564 according to `default-major-mode'.
1565 Use this function before selecting the buffer, since it may need to inspect
1566 the current buffer's major mode. */)
1571 Lisp_Object function
;
1573 if (STRINGP (XBUFFER (buffer
)->name
)
1574 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1575 function
= find_symbol_value (intern ("initial-major-mode"));
1578 function
= buffer_defaults
.major_mode
;
1580 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1581 function
= current_buffer
->major_mode
;
1584 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1587 count
= SPECPDL_INDEX ();
1589 /* To select a nonfundamental mode,
1590 select the buffer temporarily and then call the mode function. */
1592 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1594 Fset_buffer (buffer
);
1597 return unbind_to (count
, Qnil
);
1600 /* If switching buffers in WINDOW would be an error, return
1601 a C string saying what the error would be. */
1604 no_switch_window (window
)
1608 if (EQ (minibuf_window
, window
))
1609 return "Cannot switch buffers in minibuffer window";
1610 tem
= Fwindow_dedicated_p (window
);
1612 return "Cannot switch buffers in a dedicated window";
1616 /* Switch to buffer BUFFER in the selected window.
1617 If NORECORD is non-nil, don't call record_buffer. */
1620 switch_to_buffer_1 (buffer
, norecord
)
1621 Lisp_Object buffer
, norecord
;
1623 register Lisp_Object buf
;
1626 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1629 buf
= Fget_buffer (buffer
);
1632 buf
= Fget_buffer_create (buffer
);
1633 Fset_buffer_major_mode (buf
);
1637 if (NILP (norecord
))
1638 record_buffer (buf
);
1640 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1641 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1648 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1649 doc
: /* Select buffer BUFFER in the current window.
1650 If BUFFER does not identify an existing buffer,
1651 then this function creates a buffer with that name.
1653 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1654 or nil. If BUFFER is nil, then this function chooses a buffer
1655 using `other-buffer'.
1656 Optional second arg NORECORD non-nil means
1657 do not put this buffer at the front of the list of recently selected ones.
1658 This function returns the buffer it switched to.
1660 WARNING: This is NOT the way to work on another buffer temporarily
1661 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1662 the window-buffer correspondences. */)
1664 Lisp_Object buffer
, norecord
;
1668 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1669 /* Basically a NOP. Avoid signalling an error if the selected window
1670 is dedicated, or a minibuffer, ... */
1671 return Fset_buffer (buffer
);
1673 err
= no_switch_window (selected_window
);
1674 if (err
) error (err
);
1676 return switch_to_buffer_1 (buffer
, norecord
);
1679 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1680 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1681 BUFFER may be a buffer, a string \(a buffer name), or nil.
1682 If BUFFER is a string which is not the name of an existing buffer,
1683 then this function creates a buffer with that name.
1684 If BUFFER is nil, then it chooses some other buffer.
1685 If `pop-up-windows' is non-nil, windows can be split to do this.
1686 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1687 window even if BUFFER is already visible in the selected window,
1688 and ignore `same-window-regexps' and `same-window-buffer-names'.
1689 This function returns the buffer it switched to.
1690 This uses the function `display-buffer' as a subroutine; see the documentation
1691 of `display-buffer' for additional customization information.
1693 Optional third arg NORECORD non-nil means
1694 do not put this buffer at the front of the list of recently selected ones. */)
1695 (buffer
, other_window
, norecord
)
1696 Lisp_Object buffer
, other_window
, norecord
;
1698 register Lisp_Object buf
;
1700 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1703 buf
= Fget_buffer (buffer
);
1706 buf
= Fget_buffer_create (buffer
);
1707 Fset_buffer_major_mode (buf
);
1711 if (NILP (norecord
))
1712 /* Why bother ? Fselect_window will do it for us anyway. -stef */
1713 record_buffer (buf
);
1714 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1718 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1719 doc
: /* Return the current buffer as a Lisp object. */)
1722 register Lisp_Object buf
;
1723 XSETBUFFER (buf
, current_buffer
);
1727 /* Set the current buffer to B.
1729 We previously set windows_or_buffers_changed here to invalidate
1730 global unchanged information in beg_unchanged and end_unchanged.
1731 This is no longer necessary because we now compute unchanged
1732 information on a buffer-basis. Every action affecting other
1733 windows than the selected one requires a select_window at some
1734 time, and that increments windows_or_buffers_changed. */
1737 set_buffer_internal (b
)
1738 register struct buffer
*b
;
1740 if (current_buffer
!= b
)
1741 set_buffer_internal_1 (b
);
1744 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1745 This is used by redisplay. */
1748 set_buffer_internal_1 (b
)
1749 register struct buffer
*b
;
1751 register struct buffer
*old_buf
;
1752 register Lisp_Object tail
, valcontents
;
1755 #ifdef USE_MMAP_FOR_BUFFERS
1756 if (b
->text
->beg
== NULL
)
1757 enlarge_buffer_text (b
, 0);
1758 #endif /* USE_MMAP_FOR_BUFFERS */
1760 if (current_buffer
== b
)
1763 old_buf
= current_buffer
;
1765 last_known_column_point
= -1; /* invalidate indentation cache */
1769 /* Put the undo list back in the base buffer, so that it appears
1770 that an indirect buffer shares the undo list of its base. */
1771 if (old_buf
->base_buffer
)
1772 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1774 /* If the old current buffer has markers to record PT, BEGV and ZV
1775 when it is not current, update them now. */
1776 if (! NILP (old_buf
->pt_marker
))
1779 XSETBUFFER (obuf
, old_buf
);
1780 set_marker_both (old_buf
->pt_marker
, obuf
,
1781 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1783 if (! NILP (old_buf
->begv_marker
))
1786 XSETBUFFER (obuf
, old_buf
);
1787 set_marker_both (old_buf
->begv_marker
, obuf
,
1788 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1790 if (! NILP (old_buf
->zv_marker
))
1793 XSETBUFFER (obuf
, old_buf
);
1794 set_marker_both (old_buf
->zv_marker
, obuf
,
1795 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1799 /* Get the undo list from the base buffer, so that it appears
1800 that an indirect buffer shares the undo list of its base. */
1802 b
->undo_list
= b
->base_buffer
->undo_list
;
1804 /* If the new current buffer has markers to record PT, BEGV and ZV
1805 when it is not current, fetch them now. */
1806 if (! NILP (b
->pt_marker
))
1808 BUF_PT (b
) = marker_position (b
->pt_marker
);
1809 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1811 if (! NILP (b
->begv_marker
))
1813 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1814 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1816 if (! NILP (b
->zv_marker
))
1818 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1819 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1822 /* Look down buffer's list of local Lisp variables
1823 to find and update any that forward into C variables. */
1825 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1827 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1828 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1829 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1830 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1831 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1832 /* Just reference the variable
1833 to cause it to become set for this buffer. */
1834 Fsymbol_value (XCAR (XCAR (tail
)));
1837 /* Do the same with any others that were local to the previous buffer */
1840 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1842 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1843 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1844 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1845 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1846 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1847 /* Just reference the variable
1848 to cause it to become set for this buffer. */
1849 Fsymbol_value (XCAR (XCAR (tail
)));
1853 /* Switch to buffer B temporarily for redisplay purposes.
1854 This avoids certain things that don't need to be done within redisplay. */
1860 register struct buffer
*old_buf
;
1862 if (current_buffer
== b
)
1865 old_buf
= current_buffer
;
1870 /* If the old current buffer has markers to record PT, BEGV and ZV
1871 when it is not current, update them now. */
1872 if (! NILP (old_buf
->pt_marker
))
1875 XSETBUFFER (obuf
, old_buf
);
1876 set_marker_both (old_buf
->pt_marker
, obuf
,
1877 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1879 if (! NILP (old_buf
->begv_marker
))
1882 XSETBUFFER (obuf
, old_buf
);
1883 set_marker_both (old_buf
->begv_marker
, obuf
,
1884 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1886 if (! NILP (old_buf
->zv_marker
))
1889 XSETBUFFER (obuf
, old_buf
);
1890 set_marker_both (old_buf
->zv_marker
, obuf
,
1891 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1895 /* If the new current buffer has markers to record PT, BEGV and ZV
1896 when it is not current, fetch them now. */
1897 if (! NILP (b
->pt_marker
))
1899 BUF_PT (b
) = marker_position (b
->pt_marker
);
1900 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1902 if (! NILP (b
->begv_marker
))
1904 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1905 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1907 if (! NILP (b
->zv_marker
))
1909 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1910 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1914 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1915 doc
: /* Make the buffer BUFFER current for editing operations.
1916 BUFFER may be a buffer or the name of an existing buffer.
1917 See also `save-excursion' when you want to make a buffer current temporarily.
1918 This function does not display the buffer, so its effect ends
1919 when the current command terminates.
1920 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1922 register Lisp_Object buffer
;
1924 register Lisp_Object buf
;
1925 buf
= Fget_buffer (buffer
);
1928 if (NILP (XBUFFER (buf
)->name
))
1929 error ("Selecting deleted buffer");
1930 set_buffer_internal (XBUFFER (buf
));
1934 /* Set the current buffer to BUFFER provided it is alive. */
1937 set_buffer_if_live (buffer
)
1940 if (! NILP (XBUFFER (buffer
)->name
))
1941 Fset_buffer (buffer
);
1945 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1946 Sbarf_if_buffer_read_only
, 0, 0, 0,
1947 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1950 if (!NILP (current_buffer
->read_only
)
1951 && NILP (Vinhibit_read_only
))
1952 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1956 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1957 doc
: /* Put BUFFER at the end of the list of all buffers.
1958 There it is the least likely candidate for `other-buffer' to return;
1959 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1960 You can specify a buffer name as BUFFER, or an actual buffer object.
1961 If BUFFER is nil or omitted, bury the current buffer.
1962 Also, if BUFFER is nil or omitted, remove the current buffer from the
1963 selected window if it is displayed there. */)
1965 register Lisp_Object buffer
;
1967 /* Figure out what buffer we're going to bury. */
1971 XSETBUFFER (buffer
, current_buffer
);
1973 tem
= Fwindow_buffer (selected_window
);
1974 /* If we're burying the current buffer, unshow it. */
1975 if (EQ (buffer
, tem
))
1977 if (NILP (Fwindow_dedicated_p (selected_window
)))
1978 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1979 else if (NILP (XWINDOW (selected_window
)->parent
))
1980 Ficonify_frame (Fwindow_frame (selected_window
));
1982 Fdelete_window (selected_window
);
1989 buf1
= Fget_buffer (buffer
);
1995 /* Move buffer to the end of the buffer list. Do nothing if the
1996 buffer is killed. */
1997 if (!NILP (XBUFFER (buffer
)->name
))
1999 Lisp_Object aelt
, link
;
2001 aelt
= Frassq (buffer
, Vbuffer_alist
);
2002 link
= Fmemq (aelt
, Vbuffer_alist
);
2003 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2004 XSETCDR (link
, Qnil
);
2005 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2007 /* Removing BUFFER from frame-specific lists
2008 has the effect of putting BUFFER at the end
2009 of the combined list in each frame. */
2010 frames_discard_buffer (buffer
);
2016 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2017 doc
: /* Delete the entire contents of the current buffer.
2018 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2019 so the buffer is truly empty after this. */)
2026 current_buffer
->last_window_start
= 1;
2027 /* Prevent warnings, or suspension of auto saving, that would happen
2028 if future size is less than past size. Use of erase-buffer
2029 implies that the future text is not really related to the past text. */
2030 XSETFASTINT (current_buffer
->save_length
, 0);
2035 validate_region (b
, e
)
2036 register Lisp_Object
*b
, *e
;
2038 CHECK_NUMBER_COERCE_MARKER (*b
);
2039 CHECK_NUMBER_COERCE_MARKER (*e
);
2041 if (XINT (*b
) > XINT (*e
))
2044 tem
= *b
; *b
= *e
; *e
= tem
;
2047 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2048 && XINT (*e
) <= ZV
))
2049 args_out_of_range (*b
, *e
);
2052 /* Advance BYTE_POS up to a character boundary
2053 and return the adjusted position. */
2056 advance_to_char_boundary (byte_pos
)
2061 if (byte_pos
== BEG
)
2062 /* Beginning of buffer is always a character boundary. */
2065 c
= FETCH_BYTE (byte_pos
);
2066 if (! CHAR_HEAD_P (c
))
2068 /* We should advance BYTE_POS only when C is a constituent of a
2069 multibyte sequence. */
2070 int orig_byte_pos
= byte_pos
;
2075 c
= FETCH_BYTE (byte_pos
);
2077 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2079 if (byte_pos
< orig_byte_pos
)
2080 byte_pos
= orig_byte_pos
;
2081 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2082 surely advance to the correct character boundary. If C is
2083 not, BYTE_POS was unchanged. */
2089 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2091 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2092 If FLAG is t, this makes the buffer a multibyte buffer.
2093 If FLAG is nil, this makes the buffer a single-byte buffer.
2094 The buffer contents remain unchanged as a sequence of bytes
2095 but the contents viewed as characters do change.
2096 If the multibyte flag was really changed, undo information of the
2097 current buffer is cleared. */)
2101 struct Lisp_Marker
*tail
, *markers
;
2102 struct buffer
*other
;
2103 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2105 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2106 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2108 if (current_buffer
->base_buffer
)
2109 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2111 /* Do nothing if nothing actually changes. */
2112 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2115 /* It would be better to update the list,
2116 but this is good enough for now. */
2118 current_buffer
->undo_list
= Qt
;
2120 /* If the cached position is for this buffer, clear it out. */
2121 clear_charpos_cache (current_buffer
);
2124 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2126 begv
= BEGV
, zv
= ZV
;
2136 /* Do this first, so it can use CHAR_TO_BYTE
2137 to calculate the old correspondences. */
2138 set_intervals_multibyte (0);
2140 current_buffer
->enable_multibyte_characters
= Qnil
;
2146 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2149 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2150 tail
->charpos
= tail
->bytepos
;
2152 /* Convert multibyte form of 8-bit characters to unibyte. */
2167 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
2168 p
+= bytes
, pos
+= bytes
;
2171 c
= STRING_CHAR (p
, stop
- pos
);
2172 /* Delete all bytes for this 8-bit character but the
2173 last one, and change the last one to the charcter
2176 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2188 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2196 /* Be sure not to have a multibyte sequence striding over the GAP.
2197 Ex: We change this: "...abc\201 _GAP_ \241def..."
2198 to: "...abc _GAP_ \201\241def..." */
2200 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2201 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2203 unsigned char *p
= GPT_ADDR
- 1;
2205 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2206 if (BASE_LEADING_CODE_P (*p
))
2208 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2210 move_gap_both (new_gpt
, new_gpt
);
2214 /* Make the buffer contents valid as multibyte by converting
2215 8-bit characters to multibyte form. */
2231 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2232 p
+= bytes
, pos
+= bytes
;
2235 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2237 bytes
= CHAR_STRING (*p
, tmp
);
2239 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2241 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2242 /* Now the gap is after the just inserted data. */
2259 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2261 /* Do this first, so that chars_in_text asks the right question.
2262 set_intervals_multibyte needs it too. */
2263 current_buffer
->enable_multibyte_characters
= Qt
;
2265 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2266 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2268 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2270 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2271 if (BEGV_BYTE
> GPT_BYTE
)
2272 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2274 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2276 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2277 if (ZV_BYTE
> GPT_BYTE
)
2278 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2280 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2283 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2286 if (pt_byte
> GPT_BYTE
)
2287 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2289 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2290 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2293 tail
= markers
= BUF_MARKERS (current_buffer
);
2295 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2296 getting confused by the markers that have not yet been updated.
2297 It is also a signal that it should never create a marker. */
2298 BUF_MARKERS (current_buffer
) = NULL
;
2300 for (; tail
; tail
= tail
->next
)
2302 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2303 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2306 /* Make sure no markers were put on the chain
2307 while the chain value was incorrect. */
2308 if (BUF_MARKERS (current_buffer
))
2311 BUF_MARKERS (current_buffer
) = markers
;
2313 /* Do this last, so it can calculate the new correspondences
2314 between chars and bytes. */
2315 set_intervals_multibyte (1);
2319 current_buffer
->undo_list
= Qnil
;
2321 /* Changing the multibyteness of a buffer means that all windows
2322 showing that buffer must be updated thoroughly. */
2323 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2324 ++windows_or_buffers_changed
;
2326 /* Copy this buffer's new multibyte status
2327 into all of its indirect buffers. */
2328 for (other
= all_buffers
; other
; other
= other
->next
)
2329 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2331 other
->enable_multibyte_characters
2332 = current_buffer
->enable_multibyte_characters
;
2333 other
->prevent_redisplay_optimizations_p
= 1;
2336 /* Restore the modifiedness of the buffer. */
2337 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2338 Fset_buffer_modified_p (Qnil
);
2341 /* Update coding systems of this buffer's process (if any). */
2343 Lisp_Object process
;
2345 process
= Fget_buffer_process (Fcurrent_buffer ());
2346 if (PROCESSP (process
))
2347 setup_process_coding_systems (process
);
2349 #endif /* subprocesses */
2354 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2356 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2357 Most local variable bindings are eliminated so that the default values
2358 become effective once more. Also, the syntax table is set from
2359 `standard-syntax-table', the local keymap is set to nil,
2360 and the abbrev table from `fundamental-mode-abbrev-table'.
2361 This function also forces redisplay of the mode line.
2363 Every function to select a new major mode starts by
2364 calling this function.
2366 As a special exception, local variables whose names have
2367 a non-nil `permanent-local' property are not eliminated by this function.
2369 The first thing this function does is run
2370 the normal hook `change-major-mode-hook'. */)
2373 register Lisp_Object alist
, sym
, tem
;
2376 if (!NILP (Vrun_hooks
))
2377 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2378 oalist
= current_buffer
->local_var_alist
;
2380 /* Make sure none of the bindings in oalist
2381 remain swapped in, in their symbols. */
2383 swap_out_buffer_local_variables (current_buffer
);
2385 /* Actually eliminate all local bindings of this buffer. */
2387 reset_buffer_local_variables (current_buffer
, 0);
2389 /* Any which are supposed to be permanent,
2390 make local again, with the same values they had. */
2392 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2394 sym
= XCAR (XCAR (alist
));
2395 tem
= Fget (sym
, Qpermanent_local
);
2398 Fmake_local_variable (sym
);
2399 Fset (sym
, XCDR (XCAR (alist
)));
2403 /* Force mode-line redisplay. Useful here because all major mode
2404 commands call this function. */
2405 update_mode_lines
++;
2410 /* Make sure no local variables remain set up with buffer B
2411 for their current values. */
2414 swap_out_buffer_local_variables (b
)
2417 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2419 XSETBUFFER (buffer
, b
);
2420 oalist
= b
->local_var_alist
;
2422 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2424 sym
= XCAR (XCAR (alist
));
2426 /* Need not do anything if some other buffer's binding is now encached. */
2427 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2428 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2430 /* Symbol is set up for this buffer's old local value.
2431 Set it up for the current buffer with the default value. */
2433 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2434 /* Store the symbol's current value into the alist entry
2435 it is currently set up for. This is so that, if the
2436 local is marked permanent, and we make it local again
2437 later in Fkill_all_local_variables, we don't lose the value. */
2438 XSETCDR (XCAR (tem
),
2439 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2440 /* Switch to the symbol's default-value alist entry. */
2442 /* Mark it as current for buffer B. */
2443 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2444 /* Store the current value into any forwarding in the symbol. */
2445 store_symval_forwarding (sym
,
2446 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2452 /* Find all the overlays in the current buffer that contain position POS.
2453 Return the number found, and store them in a vector in *VEC_PTR.
2454 Store in *LEN_PTR the size allocated for the vector.
2455 Store in *NEXT_PTR the next position after POS where an overlay starts,
2456 or ZV if there are no more overlays.
2457 Store in *PREV_PTR the previous position before POS where an overlay ends,
2458 or where an overlay starts which ends at or after POS;
2459 or BEGV if there are no such overlays.
2460 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2462 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2463 when this function is called.
2465 If EXTEND is non-zero, we make the vector bigger if necessary.
2466 If EXTEND is zero, we never extend the vector,
2467 and we store only as many overlays as will fit.
2468 But we still return the total number of overlays.
2470 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2471 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2472 default (BEGV or ZV). */
2475 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2478 Lisp_Object
**vec_ptr
;
2484 Lisp_Object overlay
, start
, end
;
2485 struct Lisp_Overlay
*tail
;
2488 Lisp_Object
*vec
= *vec_ptr
;
2491 int inhibit_storing
= 0;
2493 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2495 int startpos
, endpos
;
2497 XSETMISC (overlay
, tail
);
2499 start
= OVERLAY_START (overlay
);
2500 end
= OVERLAY_END (overlay
);
2501 endpos
= OVERLAY_POSITION (end
);
2508 startpos
= OVERLAY_POSITION (start
);
2509 /* This one ends at or after POS
2510 so its start counts for PREV_PTR if it's before POS. */
2511 if (prev
< startpos
&& startpos
< pos
)
2515 if (startpos
<= pos
)
2519 /* The supplied vector is full.
2520 Either make it bigger, or don't store any more in it. */
2523 /* Make it work with an initial len == 0. */
2528 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2532 inhibit_storing
= 1;
2535 if (!inhibit_storing
)
2537 /* Keep counting overlays even if we can't return them all. */
2540 else if (startpos
< next
)
2544 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2546 int startpos
, endpos
;
2548 XSETMISC (overlay
, tail
);
2550 start
= OVERLAY_START (overlay
);
2551 end
= OVERLAY_END (overlay
);
2552 startpos
= OVERLAY_POSITION (start
);
2555 if (startpos
< next
)
2559 endpos
= OVERLAY_POSITION (end
);
2566 /* Make it work with an initial len == 0. */
2571 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2575 inhibit_storing
= 1;
2578 if (!inhibit_storing
)
2582 if (startpos
< pos
&& startpos
> prev
)
2585 else if (endpos
< pos
&& endpos
> prev
)
2587 else if (endpos
== pos
&& startpos
> prev
2588 && (!change_req
|| startpos
< pos
))
2599 /* Find all the overlays in the current buffer that overlap the range BEG-END
2600 or are empty at BEG.
2602 Return the number found, and store them in a vector in *VEC_PTR.
2603 Store in *LEN_PTR the size allocated for the vector.
2604 Store in *NEXT_PTR the next position after POS where an overlay starts,
2605 or ZV if there are no more overlays.
2606 Store in *PREV_PTR the previous position before POS where an overlay ends,
2607 or BEGV if there are no previous overlays.
2608 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2610 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2611 when this function is called.
2613 If EXTEND is non-zero, we make the vector bigger if necessary.
2614 If EXTEND is zero, we never extend the vector,
2615 and we store only as many overlays as will fit.
2616 But we still return the total number of overlays. */
2619 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2622 Lisp_Object
**vec_ptr
;
2627 Lisp_Object overlay
, ostart
, oend
;
2628 struct Lisp_Overlay
*tail
;
2631 Lisp_Object
*vec
= *vec_ptr
;
2634 int inhibit_storing
= 0;
2636 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2638 int startpos
, endpos
;
2640 XSETMISC (overlay
, tail
);
2642 ostart
= OVERLAY_START (overlay
);
2643 oend
= OVERLAY_END (overlay
);
2644 endpos
= OVERLAY_POSITION (oend
);
2651 startpos
= OVERLAY_POSITION (ostart
);
2652 /* Count an interval if it either overlaps the range
2653 or is empty at the start of the range. */
2654 if ((beg
< endpos
&& startpos
< end
)
2655 || (startpos
== endpos
&& beg
== endpos
))
2659 /* The supplied vector is full.
2660 Either make it bigger, or don't store any more in it. */
2663 /* Make it work with an initial len == 0. */
2668 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2672 inhibit_storing
= 1;
2675 if (!inhibit_storing
)
2677 /* Keep counting overlays even if we can't return them all. */
2680 else if (startpos
< next
)
2684 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2686 int startpos
, endpos
;
2688 XSETMISC (overlay
, tail
);
2690 ostart
= OVERLAY_START (overlay
);
2691 oend
= OVERLAY_END (overlay
);
2692 startpos
= OVERLAY_POSITION (ostart
);
2695 if (startpos
< next
)
2699 endpos
= OVERLAY_POSITION (oend
);
2700 /* Count an interval if it either overlaps the range
2701 or is empty at the start of the range. */
2702 if ((beg
< endpos
&& startpos
< end
)
2703 || (startpos
== endpos
&& beg
== endpos
))
2709 /* Make it work with an initial len == 0. */
2714 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2718 inhibit_storing
= 1;
2721 if (!inhibit_storing
)
2725 else if (endpos
< beg
&& endpos
> prev
)
2737 /* Return non-zero if there exists an overlay with a non-nil
2738 `mouse-face' property overlapping OVERLAY. */
2741 mouse_face_overlay_overlaps (overlay
)
2742 Lisp_Object overlay
;
2744 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2745 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2747 Lisp_Object
*v
, tem
;
2750 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2751 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2754 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2755 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2758 for (i
= 0; i
< n
; ++i
)
2759 if (!EQ (v
[i
], overlay
)
2760 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2769 /* Fast function to just test if we're at an overlay boundary. */
2771 overlay_touches_p (pos
)
2774 Lisp_Object overlay
;
2775 struct Lisp_Overlay
*tail
;
2777 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2781 XSETMISC (overlay
,tail
);
2782 if (!GC_OVERLAYP (overlay
))
2785 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2788 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2792 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2796 XSETMISC (overlay
, tail
);
2797 if (!GC_OVERLAYP (overlay
))
2800 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2803 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2811 Lisp_Object overlay
;
2817 compare_overlays (v1
, v2
)
2818 const void *v1
, *v2
;
2820 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2821 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2822 if (s1
->priority
!= s2
->priority
)
2823 return s1
->priority
- s2
->priority
;
2824 if (s1
->beg
!= s2
->beg
)
2825 return s1
->beg
- s2
->beg
;
2826 if (s1
->end
!= s2
->end
)
2827 return s2
->end
- s1
->end
;
2831 /* Sort an array of overlays by priority. The array is modified in place.
2832 The return value is the new size; this may be smaller than the original
2833 size if some of the overlays were invalid or were window-specific. */
2835 sort_overlays (overlay_vec
, noverlays
, w
)
2836 Lisp_Object
*overlay_vec
;
2841 struct sortvec
*sortvec
;
2842 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2844 /* Put the valid and relevant overlays into sortvec. */
2846 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2849 Lisp_Object overlay
;
2851 overlay
= overlay_vec
[i
];
2852 if (OVERLAY_VALID (overlay
)
2853 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2854 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2856 /* If we're interested in a specific window, then ignore
2857 overlays that are limited to some other window. */
2862 window
= Foverlay_get (overlay
, Qwindow
);
2863 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2867 /* This overlay is good and counts: put it into sortvec. */
2868 sortvec
[j
].overlay
= overlay
;
2869 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2870 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2871 tem
= Foverlay_get (overlay
, Qpriority
);
2873 sortvec
[j
].priority
= XINT (tem
);
2875 sortvec
[j
].priority
= 0;
2881 /* Sort the overlays into the proper order: increasing priority. */
2884 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2886 for (i
= 0; i
< noverlays
; i
++)
2887 overlay_vec
[i
] = sortvec
[i
].overlay
;
2893 Lisp_Object string
, string2
;
2900 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2901 int size
; /* Allocated length of that array. */
2902 int used
; /* How much of the array is currently in use. */
2903 int bytes
; /* Total length of the strings in buf. */
2906 /* Buffers for storing information about the overlays touching a given
2907 position. These could be automatic variables in overlay_strings, but
2908 it's more efficient to hold onto the memory instead of repeatedly
2909 allocating and freeing it. */
2910 static struct sortstrlist overlay_heads
, overlay_tails
;
2911 static unsigned char *overlay_str_buf
;
2913 /* Allocated length of overlay_str_buf. */
2914 static int overlay_str_len
;
2916 /* A comparison function suitable for passing to qsort. */
2918 cmp_for_strings (as1
, as2
)
2921 struct sortstr
*s1
= (struct sortstr
*)as1
;
2922 struct sortstr
*s2
= (struct sortstr
*)as2
;
2923 if (s1
->size
!= s2
->size
)
2924 return s2
->size
- s1
->size
;
2925 if (s1
->priority
!= s2
->priority
)
2926 return s1
->priority
- s2
->priority
;
2931 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2932 struct sortstrlist
*ssl
;
2933 Lisp_Object str
, str2
, pri
;
2938 if (ssl
->used
== ssl
->size
)
2944 ssl
->buf
= ((struct sortstr
*)
2945 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2947 ssl
->buf
[ssl
->used
].string
= str
;
2948 ssl
->buf
[ssl
->used
].string2
= str2
;
2949 ssl
->buf
[ssl
->used
].size
= size
;
2950 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2953 if (NILP (current_buffer
->enable_multibyte_characters
))
2954 nbytes
= SCHARS (str
);
2955 else if (! STRING_MULTIBYTE (str
))
2956 nbytes
= count_size_as_multibyte (SDATA (str
),
2959 nbytes
= SBYTES (str
);
2961 ssl
->bytes
+= nbytes
;
2965 if (NILP (current_buffer
->enable_multibyte_characters
))
2966 nbytes
= SCHARS (str2
);
2967 else if (! STRING_MULTIBYTE (str2
))
2968 nbytes
= count_size_as_multibyte (SDATA (str2
),
2971 nbytes
= SBYTES (str2
);
2973 ssl
->bytes
+= nbytes
;
2977 /* Return the concatenation of the strings associated with overlays that
2978 begin or end at POS, ignoring overlays that are specific to a window
2979 other than W. The strings are concatenated in the appropriate order:
2980 shorter overlays nest inside longer ones, and higher priority inside
2981 lower. Normally all of the after-strings come first, but zero-sized
2982 overlays have their after-strings ride along with the before-strings
2983 because it would look strange to print them inside-out.
2985 Returns the string length, and stores the contents indirectly through
2986 PSTR, if that variable is non-null. The string may be overwritten by
2987 subsequent calls. */
2990 overlay_strings (pos
, w
, pstr
)
2993 unsigned char **pstr
;
2995 Lisp_Object overlay
, window
, str
;
2996 struct Lisp_Overlay
*ov
;
2997 int startpos
, endpos
;
2998 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3000 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3001 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3002 for (ov
= current_buffer
->overlays_before
; ov
; ov
= ov
->next
)
3004 XSETMISC (overlay
, ov
);
3005 eassert (OVERLAYP (overlay
));
3007 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3008 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3011 if (endpos
!= pos
&& startpos
!= pos
)
3013 window
= Foverlay_get (overlay
, Qwindow
);
3014 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3017 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3018 record_overlay_string (&overlay_heads
, str
,
3020 ? Foverlay_get (overlay
, Qafter_string
)
3022 Foverlay_get (overlay
, Qpriority
),
3024 else if (endpos
== pos
3025 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3026 record_overlay_string (&overlay_tails
, str
, Qnil
,
3027 Foverlay_get (overlay
, Qpriority
),
3030 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3032 XSETMISC (overlay
, ov
);
3033 eassert (OVERLAYP (overlay
));
3035 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3036 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3039 if (endpos
!= pos
&& startpos
!= pos
)
3041 window
= Foverlay_get (overlay
, Qwindow
);
3042 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3045 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3046 record_overlay_string (&overlay_heads
, str
,
3048 ? Foverlay_get (overlay
, Qafter_string
)
3050 Foverlay_get (overlay
, Qpriority
),
3052 else if (endpos
== pos
3053 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3054 record_overlay_string (&overlay_tails
, str
, Qnil
,
3055 Foverlay_get (overlay
, Qpriority
),
3058 if (overlay_tails
.used
> 1)
3059 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3061 if (overlay_heads
.used
> 1)
3062 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3064 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3069 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3071 if (total
> overlay_str_len
)
3073 overlay_str_len
= total
;
3074 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3077 p
= overlay_str_buf
;
3078 for (i
= overlay_tails
.used
; --i
>= 0;)
3081 tem
= overlay_tails
.buf
[i
].string
;
3082 nbytes
= copy_text (SDATA (tem
), p
,
3084 STRING_MULTIBYTE (tem
), multibyte
);
3087 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3090 tem
= overlay_heads
.buf
[i
].string
;
3091 nbytes
= copy_text (SDATA (tem
), p
,
3093 STRING_MULTIBYTE (tem
), multibyte
);
3095 tem
= overlay_heads
.buf
[i
].string2
;
3098 nbytes
= copy_text (SDATA (tem
), p
,
3100 STRING_MULTIBYTE (tem
), multibyte
);
3104 if (p
!= overlay_str_buf
+ total
)
3107 *pstr
= overlay_str_buf
;
3113 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3116 recenter_overlay_lists (buf
, pos
)
3120 Lisp_Object overlay
, beg
, end
;
3121 struct Lisp_Overlay
*prev
, *tail
, *next
;
3123 /* See if anything in overlays_before should move to overlays_after. */
3125 /* We don't strictly need prev in this loop; it should always be nil.
3126 But we use it for symmetry and in case that should cease to be true
3127 with some future change. */
3129 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3132 XSETMISC (overlay
, tail
);
3134 /* If the overlay is not valid, get rid of it. */
3135 if (!OVERLAY_VALID (overlay
))
3140 /* Splice the cons cell TAIL out of overlays_before. */
3144 buf
->overlays_before
= next
;
3150 beg
= OVERLAY_START (overlay
);
3151 end
= OVERLAY_END (overlay
);
3153 if (OVERLAY_POSITION (end
) > pos
)
3155 /* OVERLAY needs to be moved. */
3156 int where
= OVERLAY_POSITION (beg
);
3157 struct Lisp_Overlay
*other
, *other_prev
;
3159 /* Splice the cons cell TAIL out of overlays_before. */
3163 buf
->overlays_before
= next
;
3165 /* Search thru overlays_after for where to put it. */
3167 for (other
= buf
->overlays_after
; other
;
3168 other_prev
= other
, other
= other
->next
)
3170 Lisp_Object otherbeg
, otheroverlay
;
3172 XSETMISC (otheroverlay
, other
);
3173 eassert (OVERLAY_VALID (otheroverlay
));
3175 otherbeg
= OVERLAY_START (otheroverlay
);
3176 if (OVERLAY_POSITION (otherbeg
) >= where
)
3180 /* Add TAIL to overlays_after before OTHER. */
3183 other_prev
->next
= tail
;
3185 buf
->overlays_after
= tail
;
3189 /* We've reached the things that should stay in overlays_before.
3190 All the rest of overlays_before must end even earlier,
3195 /* See if anything in overlays_after should be in overlays_before. */
3197 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3200 XSETMISC (overlay
, tail
);
3202 /* If the overlay is not valid, get rid of it. */
3203 if (!OVERLAY_VALID (overlay
))
3208 /* Splice the cons cell TAIL out of overlays_after. */
3212 buf
->overlays_after
= next
;
3218 beg
= OVERLAY_START (overlay
);
3219 end
= OVERLAY_END (overlay
);
3221 /* Stop looking, when we know that nothing further
3222 can possibly end before POS. */
3223 if (OVERLAY_POSITION (beg
) > pos
)
3226 if (OVERLAY_POSITION (end
) <= pos
)
3228 /* OVERLAY needs to be moved. */
3229 int where
= OVERLAY_POSITION (end
);
3230 struct Lisp_Overlay
*other
, *other_prev
;
3232 /* Splice the cons cell TAIL out of overlays_after. */
3236 buf
->overlays_after
= next
;
3238 /* Search thru overlays_before for where to put it. */
3240 for (other
= buf
->overlays_before
; other
;
3241 other_prev
= other
, other
= other
->next
)
3243 Lisp_Object otherend
, otheroverlay
;
3245 XSETMISC (otheroverlay
, other
);
3246 eassert (OVERLAY_VALID (otheroverlay
));
3248 otherend
= OVERLAY_END (otheroverlay
);
3249 if (OVERLAY_POSITION (otherend
) <= where
)
3253 /* Add TAIL to overlays_before before OTHER. */
3256 other_prev
->next
= tail
;
3258 buf
->overlays_before
= tail
;
3263 buf
->overlay_center
= pos
;
3267 adjust_overlays_for_insert (pos
, length
)
3271 /* After an insertion, the lists are still sorted properly,
3272 but we may need to update the value of the overlay center. */
3273 if (current_buffer
->overlay_center
>= pos
)
3274 current_buffer
->overlay_center
+= length
;
3278 adjust_overlays_for_delete (pos
, length
)
3282 if (current_buffer
->overlay_center
< pos
)
3283 /* The deletion was to our right. No change needed; the before- and
3284 after-lists are still consistent. */
3286 else if (current_buffer
->overlay_center
> pos
+ length
)
3287 /* The deletion was to our left. We need to adjust the center value
3288 to account for the change in position, but the lists are consistent
3289 given the new value. */
3290 current_buffer
->overlay_center
-= length
;
3292 /* We're right in the middle. There might be things on the after-list
3293 that now belong on the before-list. Recentering will move them,
3294 and also update the center point. */
3295 recenter_overlay_lists (current_buffer
, pos
);
3298 /* Fix up overlays that were garbled as a result of permuting markers
3299 in the range START through END. Any overlay with at least one
3300 endpoint in this range will need to be unlinked from the overlay
3301 list and reinserted in its proper place.
3302 Such an overlay might even have negative size at this point.
3303 If so, we'll make the overlay empty. */
3305 fix_start_end_in_overlays (start
, end
)
3306 register int start
, end
;
3308 Lisp_Object overlay
;
3309 struct Lisp_Overlay
*before_list
, *after_list
;
3310 /* These are either nil, indicating that before_list or after_list
3311 should be assigned, or the cons cell the cdr of which should be
3313 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3314 /* 'Parent', likewise, indicates a cons cell or
3315 current_buffer->overlays_before or overlays_after, depending
3316 which loop we're in. */
3317 struct Lisp_Overlay
*tail
, *parent
;
3318 int startpos
, endpos
;
3320 /* This algorithm shifts links around instead of consing and GCing.
3321 The loop invariant is that before_list (resp. after_list) is a
3322 well-formed list except that its last element, the CDR of beforep
3323 (resp. afterp) if beforep (afterp) isn't nil or before_list
3324 (after_list) if it is, is still uninitialized. So it's not a bug
3325 that before_list isn't initialized, although it may look
3327 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3329 XSETMISC (overlay
, tail
);
3331 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3332 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3334 /* If the overlay is backwards, make it empty. */
3335 if (endpos
< startpos
)
3338 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3346 || (startpos
>= start
&& startpos
< end
))
3348 /* Add it to the end of the wrong list. Later on,
3349 recenter_overlay_lists will move it to the right place. */
3350 if (endpos
< current_buffer
->overlay_center
)
3355 afterp
->next
= tail
;
3363 beforep
->next
= tail
;
3367 current_buffer
->overlays_before
= tail
->next
;
3369 parent
->next
= tail
->next
;
3373 parent
= tail
, tail
= parent
->next
;
3375 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3377 XSETMISC (overlay
, tail
);
3379 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3380 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3382 /* If the overlay is backwards, make it empty. */
3383 if (endpos
< startpos
)
3386 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3390 if (startpos
>= end
)
3393 if (startpos
>= start
3394 || (endpos
>= start
&& endpos
< end
))
3396 if (endpos
< current_buffer
->overlay_center
)
3401 afterp
->next
= tail
;
3409 beforep
->next
= tail
;
3413 current_buffer
->overlays_after
= tail
->next
;
3415 parent
->next
= tail
->next
;
3419 parent
= tail
, tail
= parent
->next
;
3422 /* Splice the constructed (wrong) lists into the buffer's lists,
3423 and let the recenter function make it sane again. */
3426 beforep
->next
= current_buffer
->overlays_before
;
3427 current_buffer
->overlays_before
= before_list
;
3429 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3433 afterp
->next
= current_buffer
->overlays_after
;
3434 current_buffer
->overlays_after
= after_list
;
3436 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3439 /* We have two types of overlay: the one whose ending marker is
3440 after-insertion-marker (this is the usual case) and the one whose
3441 ending marker is before-insertion-marker. When `overlays_before'
3442 contains overlays of the latter type and the former type in this
3443 order and both overlays end at inserting position, inserting a text
3444 increases only the ending marker of the latter type, which results
3445 in incorrect ordering of `overlays_before'.
3447 This function fixes ordering of overlays in the slot
3448 `overlays_before' of the buffer *BP. Before the insertion, `point'
3449 was at PREV, and now is at POS. */
3452 fix_overlays_before (bp
, prev
, pos
)
3454 EMACS_INT prev
, pos
;
3456 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3457 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3461 /* After the insertion, the several overlays may be in incorrect
3462 order. The possibility is that, in the list `overlays_before',
3463 an overlay which ends at POS appears after an overlay which ends
3464 at PREV. Since POS is greater than PREV, we must fix the
3465 ordering of these overlays, by moving overlays ends at POS before
3466 the overlays ends at PREV. */
3468 /* At first, find a place where disordered overlays should be linked
3469 in. It is where an overlay which end before POS exists. (i.e. an
3470 overlay whose ending marker is after-insertion-marker if disorder
3473 && (XSETMISC (tem
, tail
),
3474 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3480 /* If we don't find such an overlay,
3481 or the found one ends before PREV,
3482 or the found one is the last one in the list,
3483 we don't have to fix anything. */
3484 if (!tail
|| end
< prev
|| !tail
->next
)
3487 right_pair
= parent
;
3491 /* Now, end position of overlays in the list TAIL should be before
3492 or equal to PREV. In the loop, an overlay which ends at POS is
3493 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3494 we found an overlay which ends before PREV, the remaining
3495 overlays are in correct order. */
3498 XSETMISC (tem
, tail
);
3499 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3502 { /* This overlay is disordered. */
3503 struct Lisp_Overlay
*found
= tail
;
3505 /* Unlink the found overlay. */
3507 parent
->next
= tail
;
3508 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3509 and link it into the right place. */
3512 found
->next
= bp
->overlays_before
;
3513 bp
->overlays_before
= found
;
3517 found
->next
= right_pair
->next
;
3518 right_pair
->next
= found
;
3521 else if (end
== prev
)
3526 else /* No more disordered overlay. */
3531 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3532 doc
: /* Return t if OBJECT is an overlay. */)
3536 return (OVERLAYP (object
) ? Qt
: Qnil
);
3539 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3540 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3541 If omitted, BUFFER defaults to the current buffer.
3542 BEG and END may be integers or markers.
3543 The fourth arg FRONT-ADVANCE, if non-nil, makes the
3544 front delimiter advance when text is inserted there.
3545 The fifth arg REAR-ADVANCE, if non-nil, makes the
3546 rear delimiter advance when text is inserted there. */)
3547 (beg
, end
, buffer
, front_advance
, rear_advance
)
3548 Lisp_Object beg
, end
, buffer
;
3549 Lisp_Object front_advance
, rear_advance
;
3551 Lisp_Object overlay
;
3555 XSETBUFFER (buffer
, current_buffer
);
3557 CHECK_BUFFER (buffer
);
3559 && ! EQ (Fmarker_buffer (beg
), buffer
))
3560 error ("Marker points into wrong buffer");
3562 && ! EQ (Fmarker_buffer (end
), buffer
))
3563 error ("Marker points into wrong buffer");
3565 CHECK_NUMBER_COERCE_MARKER (beg
);
3566 CHECK_NUMBER_COERCE_MARKER (end
);
3568 if (XINT (beg
) > XINT (end
))
3571 temp
= beg
; beg
= end
; end
= temp
;
3574 b
= XBUFFER (buffer
);
3576 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3577 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3579 if (!NILP (front_advance
))
3580 XMARKER (beg
)->insertion_type
= 1;
3581 if (!NILP (rear_advance
))
3582 XMARKER (end
)->insertion_type
= 1;
3584 overlay
= allocate_misc ();
3585 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3586 XOVERLAY (overlay
)->start
= beg
;
3587 XOVERLAY (overlay
)->end
= end
;
3588 XOVERLAY (overlay
)->plist
= Qnil
;
3589 XOVERLAY (overlay
)->next
= NULL
;
3591 /* Put the new overlay on the wrong list. */
3592 end
= OVERLAY_END (overlay
);
3593 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3595 if (b
->overlays_after
)
3596 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3597 b
->overlays_after
= XOVERLAY (overlay
);
3601 if (b
->overlays_before
)
3602 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3603 b
->overlays_before
= XOVERLAY (overlay
);
3606 /* This puts it in the right list, and in the right order. */
3607 recenter_overlay_lists (b
, b
->overlay_center
);
3609 /* We don't need to redisplay the region covered by the overlay, because
3610 the overlay has no properties at the moment. */
3615 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3618 modify_overlay (buf
, start
, end
)
3620 EMACS_INT start
, end
;
3629 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3631 /* If this is a buffer not in the selected window,
3632 we must do other windows. */
3633 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3634 windows_or_buffers_changed
= 1;
3635 /* If multiple windows show this buffer, we must do other windows. */
3636 else if (buffer_shared
> 1)
3637 windows_or_buffers_changed
= 1;
3639 ++BUF_OVERLAY_MODIFF (buf
);
3643 Lisp_Object
Fdelete_overlay ();
3645 static struct Lisp_Overlay
*
3646 unchain_overlay (list
, overlay
)
3647 struct Lisp_Overlay
*list
, *overlay
;
3649 struct Lisp_Overlay
*tmp
, *prev
;
3650 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3654 prev
->next
= tmp
->next
;
3657 overlay
->next
= NULL
;
3663 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3664 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3665 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3666 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3668 (overlay
, beg
, end
, buffer
)
3669 Lisp_Object overlay
, beg
, end
, buffer
;
3671 struct buffer
*b
, *ob
;
3672 Lisp_Object obuffer
;
3673 int count
= SPECPDL_INDEX ();
3675 CHECK_OVERLAY (overlay
);
3677 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3679 XSETBUFFER (buffer
, current_buffer
);
3680 CHECK_BUFFER (buffer
);
3683 && ! EQ (Fmarker_buffer (beg
), buffer
))
3684 error ("Marker points into wrong buffer");
3686 && ! EQ (Fmarker_buffer (end
), buffer
))
3687 error ("Marker points into wrong buffer");
3689 CHECK_NUMBER_COERCE_MARKER (beg
);
3690 CHECK_NUMBER_COERCE_MARKER (end
);
3692 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3693 return Fdelete_overlay (overlay
);
3695 if (XINT (beg
) > XINT (end
))
3698 temp
= beg
; beg
= end
; end
= temp
;
3701 specbind (Qinhibit_quit
, Qt
);
3703 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3704 b
= XBUFFER (buffer
);
3705 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3707 /* If the overlay has changed buffers, do a thorough redisplay. */
3708 if (!EQ (buffer
, obuffer
))
3710 /* Redisplay where the overlay was. */
3711 if (!NILP (obuffer
))
3716 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3717 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3719 modify_overlay (ob
, o_beg
, o_end
);
3722 /* Redisplay where the overlay is going to be. */
3723 modify_overlay (b
, XINT (beg
), XINT (end
));
3726 /* Redisplay the area the overlay has just left, or just enclosed. */
3730 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3731 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3733 if (o_beg
== XINT (beg
))
3734 modify_overlay (b
, o_end
, XINT (end
));
3735 else if (o_end
== XINT (end
))
3736 modify_overlay (b
, o_beg
, XINT (beg
));
3739 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3740 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3741 modify_overlay (b
, o_beg
, o_end
);
3745 if (!NILP (obuffer
))
3748 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3750 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3751 eassert (XOVERLAY (overlay
)->next
== NULL
);
3754 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3755 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3757 /* Put the overlay on the wrong list. */
3758 end
= OVERLAY_END (overlay
);
3759 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3761 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3762 b
->overlays_after
= XOVERLAY (overlay
);
3766 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3767 b
->overlays_before
= XOVERLAY (overlay
);
3770 /* This puts it in the right list, and in the right order. */
3771 recenter_overlay_lists (b
, b
->overlay_center
);
3773 return unbind_to (count
, overlay
);
3776 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3777 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3779 Lisp_Object overlay
;
3783 int count
= SPECPDL_INDEX ();
3785 CHECK_OVERLAY (overlay
);
3787 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3791 b
= XBUFFER (buffer
);
3792 specbind (Qinhibit_quit
, Qt
);
3794 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3795 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3796 eassert (XOVERLAY (overlay
)->next
== NULL
);
3798 marker_position (OVERLAY_START (overlay
)),
3799 marker_position (OVERLAY_END (overlay
)));
3800 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3801 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3803 /* When deleting an overlay with before or after strings, turn off
3804 display optimizations for the affected buffer, on the basis that
3805 these strings may contain newlines. This is easier to do than to
3806 check for that situation during redisplay. */
3807 if (!windows_or_buffers_changed
3808 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3809 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3810 b
->prevent_redisplay_optimizations_p
= 1;
3812 return unbind_to (count
, Qnil
);
3815 /* Overlay dissection functions. */
3817 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3818 doc
: /* Return the position at which OVERLAY starts. */)
3820 Lisp_Object overlay
;
3822 CHECK_OVERLAY (overlay
);
3824 return (Fmarker_position (OVERLAY_START (overlay
)));
3827 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3828 doc
: /* Return the position at which OVERLAY ends. */)
3830 Lisp_Object overlay
;
3832 CHECK_OVERLAY (overlay
);
3834 return (Fmarker_position (OVERLAY_END (overlay
)));
3837 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3838 doc
: /* Return the buffer OVERLAY belongs to.
3839 Return nil if OVERLAY has been deleted. */)
3841 Lisp_Object overlay
;
3843 CHECK_OVERLAY (overlay
);
3845 return Fmarker_buffer (OVERLAY_START (overlay
));
3848 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3849 doc
: /* Return a list of the properties on OVERLAY.
3850 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3853 Lisp_Object overlay
;
3855 CHECK_OVERLAY (overlay
);
3857 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3861 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3862 doc
: /* Return a list of the overlays that contain position POS. */)
3867 Lisp_Object
*overlay_vec
;
3871 CHECK_NUMBER_COERCE_MARKER (pos
);
3874 /* We can't use alloca here because overlays_at can call xrealloc. */
3875 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3877 /* Put all the overlays we want in a vector in overlay_vec.
3878 Store the length in len. */
3879 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3880 (int *) 0, (int *) 0, 0);
3882 /* Make a list of them all. */
3883 result
= Flist (noverlays
, overlay_vec
);
3885 xfree (overlay_vec
);
3889 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3890 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3891 Overlap means that at least one character is contained within the overlay
3892 and also contained within the specified region.
3893 Empty overlays are included in the result if they are located at BEG
3894 or between BEG and END. */)
3896 Lisp_Object beg
, end
;
3899 Lisp_Object
*overlay_vec
;
3903 CHECK_NUMBER_COERCE_MARKER (beg
);
3904 CHECK_NUMBER_COERCE_MARKER (end
);
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_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3912 (int *) 0, (int *) 0);
3914 /* Make a list of them all. */
3915 result
= Flist (noverlays
, overlay_vec
);
3917 xfree (overlay_vec
);
3921 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3923 doc
: /* Return the next position after POS where an overlay starts or ends.
3924 If there are no more overlay boundaries after POS, return (point-max). */)
3930 Lisp_Object
*overlay_vec
;
3934 CHECK_NUMBER_COERCE_MARKER (pos
);
3937 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3939 /* Put all the overlays we want in a vector in overlay_vec.
3940 Store the length in len.
3941 endpos gets the position where the next overlay starts. */
3942 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3943 &endpos
, (int *) 0, 1);
3945 /* If any of these overlays ends before endpos,
3946 use its ending point instead. */
3947 for (i
= 0; i
< noverlays
; i
++)
3952 oend
= OVERLAY_END (overlay_vec
[i
]);
3953 oendpos
= OVERLAY_POSITION (oend
);
3954 if (oendpos
< endpos
)
3958 xfree (overlay_vec
);
3959 return make_number (endpos
);
3962 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3963 Sprevious_overlay_change
, 1, 1, 0,
3964 doc
: /* Return the previous position before POS where an overlay starts or ends.
3965 If there are no more overlay boundaries before POS, return (point-min). */)
3971 Lisp_Object
*overlay_vec
;
3974 CHECK_NUMBER_COERCE_MARKER (pos
);
3976 /* At beginning of buffer, we know the answer;
3977 avoid bug subtracting 1 below. */
3978 if (XINT (pos
) == BEGV
)
3982 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3984 /* Put all the overlays we want in a vector in overlay_vec.
3985 Store the length in len.
3986 prevpos gets the position of the previous change. */
3987 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3988 (int *) 0, &prevpos
, 1);
3990 xfree (overlay_vec
);
3991 return make_number (prevpos
);
3994 /* These functions are for debugging overlays. */
3996 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3997 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
3998 The car has all the overlays before the overlay center;
3999 the cdr has all the overlays after the overlay center.
4000 Recentering overlays moves overlays between these lists.
4001 The lists you get are copies, so that changing them has no effect.
4002 However, the overlays you get are the real objects that the buffer uses. */)
4005 struct Lisp_Overlay
*ol
;
4006 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4007 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4010 before
= Fcons (tmp
, before
);
4012 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4015 after
= Fcons (tmp
, after
);
4017 return Fcons (Fnreverse (before
), Fnreverse (after
));
4020 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4021 doc
: /* Recenter the overlays of the current buffer around position POS.
4022 That makes overlay lookup faster for positions near POS (but perhaps slower
4023 for positions far away from POS). */)
4027 CHECK_NUMBER_COERCE_MARKER (pos
);
4029 recenter_overlay_lists (current_buffer
, XINT (pos
));
4033 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4034 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4036 Lisp_Object overlay
, prop
;
4038 CHECK_OVERLAY (overlay
);
4039 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4042 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4043 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4044 (overlay
, prop
, value
)
4045 Lisp_Object overlay
, prop
, value
;
4047 Lisp_Object tail
, buffer
;
4050 CHECK_OVERLAY (overlay
);
4052 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4054 for (tail
= XOVERLAY (overlay
)->plist
;
4055 CONSP (tail
) && CONSP (XCDR (tail
));
4056 tail
= XCDR (XCDR (tail
)))
4057 if (EQ (XCAR (tail
), prop
))
4059 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4060 XSETCAR (XCDR (tail
), value
);
4063 /* It wasn't in the list, so add it to the front. */
4064 changed
= !NILP (value
);
4065 XOVERLAY (overlay
)->plist
4066 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4068 if (! NILP (buffer
))
4071 modify_overlay (XBUFFER (buffer
),
4072 marker_position (OVERLAY_START (overlay
)),
4073 marker_position (OVERLAY_END (overlay
)));
4074 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4075 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4076 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4077 Fdelete_overlay (overlay
);
4082 /* Subroutine of report_overlay_modification. */
4084 /* Lisp vector holding overlay hook functions to call.
4085 Vector elements come in pairs.
4086 Each even-index element is a list of hook functions.
4087 The following odd-index element is the overlay they came from.
4089 Before the buffer change, we fill in this vector
4090 as we call overlay hook functions.
4091 After the buffer change, we get the functions to call from this vector.
4092 This way we always call the same functions before and after the change. */
4093 static Lisp_Object last_overlay_modification_hooks
;
4095 /* Number of elements actually used in last_overlay_modification_hooks. */
4096 static int last_overlay_modification_hooks_used
;
4098 /* Add one functionlist/overlay pair
4099 to the end of last_overlay_modification_hooks. */
4102 add_overlay_mod_hooklist (functionlist
, overlay
)
4103 Lisp_Object functionlist
, overlay
;
4105 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4107 if (last_overlay_modification_hooks_used
== oldsize
)
4110 old
= last_overlay_modification_hooks
;
4111 last_overlay_modification_hooks
4112 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4113 bcopy (XVECTOR (old
)->contents
,
4114 XVECTOR (last_overlay_modification_hooks
)->contents
,
4115 sizeof (Lisp_Object
) * oldsize
);
4117 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4118 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4121 /* Run the modification-hooks of overlays that include
4122 any part of the text in START to END.
4123 If this change is an insertion, also
4124 run the insert-before-hooks of overlay starting at END,
4125 and the insert-after-hooks of overlay ending at START.
4127 This is called both before and after the modification.
4128 AFTER is nonzero when we call after the modification.
4130 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4131 When AFTER is nonzero, they are the start position,
4132 the position after the inserted new text,
4133 and the length of deleted or replaced old text. */
4136 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4137 Lisp_Object start
, end
;
4139 Lisp_Object arg1
, arg2
, arg3
;
4141 Lisp_Object prop
, overlay
;
4142 struct Lisp_Overlay
*tail
;
4143 /* 1 if this change is an insertion. */
4144 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4145 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4150 /* We used to run the functions as soon as we found them and only register
4151 them in last_overlay_modification_hooks for the purpose of the `after'
4152 case. But running elisp code as we traverse the list of overlays is
4153 painful because the list can be modified by the elisp code so we had to
4154 copy at several places. We now simply do a read-only traversal that
4155 only collects the functions to run and we run them afterwards. It's
4156 simpler, especially since all the code was already there. -stef */
4160 /* We are being called before a change.
4161 Scan the overlays to find the functions to call. */
4162 last_overlay_modification_hooks_used
= 0;
4163 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4165 int startpos
, endpos
;
4166 Lisp_Object ostart
, oend
;
4168 XSETMISC (overlay
, tail
);
4170 ostart
= OVERLAY_START (overlay
);
4171 oend
= OVERLAY_END (overlay
);
4172 endpos
= OVERLAY_POSITION (oend
);
4173 if (XFASTINT (start
) > endpos
)
4175 startpos
= OVERLAY_POSITION (ostart
);
4176 if (insertion
&& (XFASTINT (start
) == startpos
4177 || XFASTINT (end
) == startpos
))
4179 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4181 add_overlay_mod_hooklist (prop
, overlay
);
4183 if (insertion
&& (XFASTINT (start
) == endpos
4184 || XFASTINT (end
) == endpos
))
4186 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4188 add_overlay_mod_hooklist (prop
, overlay
);
4190 /* Test for intersecting intervals. This does the right thing
4191 for both insertion and deletion. */
4192 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4194 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4196 add_overlay_mod_hooklist (prop
, overlay
);
4200 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4202 int startpos
, endpos
;
4203 Lisp_Object ostart
, oend
;
4205 XSETMISC (overlay
, tail
);
4207 ostart
= OVERLAY_START (overlay
);
4208 oend
= OVERLAY_END (overlay
);
4209 startpos
= OVERLAY_POSITION (ostart
);
4210 endpos
= OVERLAY_POSITION (oend
);
4211 if (XFASTINT (end
) < startpos
)
4213 if (insertion
&& (XFASTINT (start
) == startpos
4214 || XFASTINT (end
) == startpos
))
4216 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4218 add_overlay_mod_hooklist (prop
, overlay
);
4220 if (insertion
&& (XFASTINT (start
) == endpos
4221 || XFASTINT (end
) == endpos
))
4223 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4225 add_overlay_mod_hooklist (prop
, overlay
);
4227 /* Test for intersecting intervals. This does the right thing
4228 for both insertion and deletion. */
4229 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4231 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4233 add_overlay_mod_hooklist (prop
, overlay
);
4238 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4240 /* Call the functions recorded in last_overlay_modification_hooks.
4241 First copy the vector contents, in case some of these hooks
4242 do subsequent modification of the buffer. */
4243 int size
= last_overlay_modification_hooks_used
;
4244 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4247 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4248 copy
, size
* sizeof (Lisp_Object
));
4250 gcpro1
.nvars
= size
;
4252 for (i
= 0; i
< size
;)
4254 Lisp_Object prop
, overlay
;
4256 overlay
= copy
[i
++];
4257 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4264 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4265 Lisp_Object list
, overlay
;
4267 Lisp_Object arg1
, arg2
, arg3
;
4269 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4271 GCPRO4 (list
, arg1
, arg2
, arg3
);
4273 while (CONSP (list
))
4276 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4278 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4284 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4287 evaporate_overlays (pos
)
4290 Lisp_Object overlay
, hit_list
;
4291 struct Lisp_Overlay
*tail
;
4294 if (pos
<= current_buffer
->overlay_center
)
4295 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4298 XSETMISC (overlay
, tail
);
4299 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4302 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4303 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4304 hit_list
= Fcons (overlay
, hit_list
);
4307 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4310 XSETMISC (overlay
, tail
);
4311 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4314 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4315 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4316 hit_list
= Fcons (overlay
, hit_list
);
4318 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4319 Fdelete_overlay (XCAR (hit_list
));
4322 /* Somebody has tried to store a value with an unacceptable type
4323 in the slot with offset OFFSET. */
4326 buffer_slot_type_mismatch (offset
)
4332 switch (XINT (PER_BUFFER_TYPE (offset
)))
4335 type_name
= "integers";
4339 type_name
= "strings";
4343 type_name
= "symbols";
4350 sym
= PER_BUFFER_SYMBOL (offset
);
4351 error ("Only %s should be stored in the buffer-local variable %s",
4352 type_name
, SDATA (SYMBOL_NAME (sym
)));
4356 /***********************************************************************
4357 Allocation with mmap
4358 ***********************************************************************/
4360 #ifdef USE_MMAP_FOR_BUFFERS
4362 #include <sys/types.h>
4363 #include <sys/mman.h>
4366 #ifdef MAP_ANONYMOUS
4367 #define MAP_ANON MAP_ANONYMOUS
4374 #define MAP_FAILED ((void *) -1)
4387 /* Memory is allocated in regions which are mapped using mmap(2).
4388 The current implementation lets the system select mapped
4389 addresses; we're not using MAP_FIXED in general, except when
4390 trying to enlarge regions.
4392 Each mapped region starts with a mmap_region structure, the user
4393 area starts after that structure, aligned to MEM_ALIGN.
4395 +-----------------------+
4396 | struct mmap_info + |
4398 +-----------------------+
4402 +-----------------------+ */
4406 /* User-specified size. */
4407 size_t nbytes_specified
;
4409 /* Number of bytes mapped */
4410 size_t nbytes_mapped
;
4412 /* Pointer to the location holding the address of the memory
4413 allocated with the mmap'd block. The variable actually points
4414 after this structure. */
4417 /* Next and previous in list of all mmap'd regions. */
4418 struct mmap_region
*next
, *prev
;
4421 /* Doubly-linked list of mmap'd regions. */
4423 static struct mmap_region
*mmap_regions
;
4425 /* File descriptor for mmap. If we don't have anonymous mapping,
4426 /dev/zero will be opened on it. */
4430 /* Temporary storage for mmap_set_vars, see there. */
4432 static struct mmap_region
*mmap_regions_1
;
4433 static int mmap_fd_1
;
4435 /* Page size on this system. */
4437 static int mmap_page_size
;
4439 /* 1 means mmap has been intialized. */
4441 static int mmap_initialized_p
;
4443 /* Value is X rounded up to the next multiple of N. */
4445 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4447 /* Size of mmap_region structure plus padding. */
4449 #define MMAP_REGION_STRUCT_SIZE \
4450 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4452 /* Given a pointer P to the start of the user-visible part of a mapped
4453 region, return a pointer to the start of the region. */
4455 #define MMAP_REGION(P) \
4456 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4458 /* Given a pointer P to the start of a mapped region, return a pointer
4459 to the start of the user-visible part of the region. */
4461 #define MMAP_USER_AREA(P) \
4462 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4464 #define MEM_ALIGN sizeof (double)
4466 /* Predicate returning true if part of the address range [START .. END]
4467 is currently mapped. Used to prevent overwriting an existing
4470 Default is to conservativly assume the address range is occupied by
4471 something else. This can be overridden by system configuration
4472 files if system-specific means to determine this exists. */
4474 #ifndef MMAP_ALLOCATED_P
4475 #define MMAP_ALLOCATED_P(start, end) 1
4478 /* Function prototypes. */
4480 static int mmap_free_1
P_ ((struct mmap_region
*));
4481 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4482 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4483 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4484 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4485 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4486 static void mmap_init
P_ ((void));
4489 /* Return a region overlapping address range START...END, or null if
4490 none. END is not including, i.e. the last byte in the range
4493 static struct mmap_region
*
4494 mmap_find (start
, end
)
4495 POINTER_TYPE
*start
, *end
;
4497 struct mmap_region
*r
;
4498 char *s
= (char *) start
, *e
= (char *) end
;
4500 for (r
= mmap_regions
; r
; r
= r
->next
)
4502 char *rstart
= (char *) r
;
4503 char *rend
= rstart
+ r
->nbytes_mapped
;
4505 if (/* First byte of range, i.e. START, in this region? */
4506 (s
>= rstart
&& s
< rend
)
4507 /* Last byte of range, i.e. END - 1, in this region? */
4508 || (e
> rstart
&& e
<= rend
)
4509 /* First byte of this region in the range? */
4510 || (rstart
>= s
&& rstart
< e
)
4511 /* Last byte of this region in the range? */
4512 || (rend
> s
&& rend
<= e
))
4520 /* Unmap a region. P is a pointer to the start of the user-araa of
4521 the region. Value is non-zero if successful. */
4525 struct mmap_region
*r
;
4528 r
->next
->prev
= r
->prev
;
4530 r
->prev
->next
= r
->next
;
4532 mmap_regions
= r
->next
;
4534 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4536 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4544 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4545 Value is non-zero if successful. */
4548 mmap_enlarge (r
, npages
)
4549 struct mmap_region
*r
;
4552 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4558 /* Unmap pages at the end of the region. */
4559 nbytes
= - npages
* mmap_page_size
;
4560 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4561 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4564 r
->nbytes_mapped
-= nbytes
;
4568 else if (npages
> 0)
4570 nbytes
= npages
* mmap_page_size
;
4572 /* Try to map additional pages at the end of the region. We
4573 cannot do this if the address range is already occupied by
4574 something else because mmap deletes any previous mapping.
4575 I'm not sure this is worth doing, let's see. */
4576 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4580 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4581 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4582 if (p
== MAP_FAILED
)
4583 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4584 else if (p
!= (POINTER_TYPE
*) region_end
)
4586 /* Kernels are free to choose a different address. In
4587 that case, unmap what we've mapped above; we have
4589 if (munmap (p
, nbytes
) == -1)
4590 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4594 r
->nbytes_mapped
+= nbytes
;
4604 /* Set or reset variables holding references to mapped regions. If
4605 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4606 non-zero, set all variables to the start of the user-areas
4609 This function is called from Fdump_emacs to ensure that the dumped
4610 Emacs doesn't contain references to memory that won't be mapped
4611 when Emacs starts. */
4614 mmap_set_vars (restore_p
)
4617 struct mmap_region
*r
;
4621 mmap_regions
= mmap_regions_1
;
4622 mmap_fd
= mmap_fd_1
;
4623 for (r
= mmap_regions
; r
; r
= r
->next
)
4624 *r
->var
= MMAP_USER_AREA (r
);
4628 for (r
= mmap_regions
; r
; r
= r
->next
)
4630 mmap_regions_1
= mmap_regions
;
4631 mmap_regions
= NULL
;
4632 mmap_fd_1
= mmap_fd
;
4638 /* Allocate a block of storage large enough to hold NBYTES bytes of
4639 data. A pointer to the data is returned in *VAR. VAR is thus the
4640 address of some variable which will use the data area.
4642 The allocation of 0 bytes is valid.
4644 If we can't allocate the necessary memory, set *VAR to null, and
4647 static POINTER_TYPE
*
4648 mmap_alloc (var
, nbytes
)
4657 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4658 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4661 if (p
== MAP_FAILED
)
4663 if (errno
!= ENOMEM
)
4664 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4669 struct mmap_region
*r
= (struct mmap_region
*) p
;
4671 r
->nbytes_specified
= nbytes
;
4672 r
->nbytes_mapped
= map
;
4675 r
->next
= mmap_regions
;
4680 p
= MMAP_USER_AREA (p
);
4687 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4688 resize it to size NBYTES. Change *VAR to reflect the new block,
4689 and return this value. If more memory cannot be allocated, then
4690 leave *VAR unchanged, and return null. */
4692 static POINTER_TYPE
*
4693 mmap_realloc (var
, nbytes
)
4697 POINTER_TYPE
*result
;
4702 result
= mmap_alloc (var
, nbytes
);
4703 else if (nbytes
== 0)
4706 result
= mmap_alloc (var
, nbytes
);
4710 struct mmap_region
*r
= MMAP_REGION (*var
);
4711 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4716 POINTER_TYPE
*old_ptr
= *var
;
4718 /* Try to map additional pages at the end of the region.
4719 If that fails, allocate a new region, copy data
4720 from the old region, then free it. */
4721 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4724 r
->nbytes_specified
= nbytes
;
4725 *var
= result
= old_ptr
;
4727 else if (mmap_alloc (var
, nbytes
))
4729 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4730 mmap_free_1 (MMAP_REGION (old_ptr
));
4732 r
= MMAP_REGION (result
);
4733 r
->nbytes_specified
= nbytes
;
4741 else if (room
- nbytes
>= mmap_page_size
)
4743 /* Shrinking by at least a page. Let's give some
4744 memory back to the system.
4746 The extra parens are to make the division happens first,
4747 on positive values, so we know it will round towards
4749 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4751 r
->nbytes_specified
= nbytes
;
4755 /* Leave it alone. */
4757 r
->nbytes_specified
= nbytes
;
4765 /* Free a block of relocatable storage whose data is pointed to by
4766 PTR. Store 0 in *PTR to show there's no block allocated. */
4776 mmap_free_1 (MMAP_REGION (*var
));
4782 /* Perform necessary intializations for the use of mmap. */
4788 /* The value of mmap_fd is initially 0 in temacs, and -1
4789 in a dumped Emacs. */
4792 /* No anonymous mmap -- we need the file descriptor. */
4793 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4795 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4797 #endif /* MAP_ANON == 0 */
4799 if (mmap_initialized_p
)
4801 mmap_initialized_p
= 1;
4807 mmap_page_size
= getpagesize ();
4810 #endif /* USE_MMAP_FOR_BUFFERS */
4814 /***********************************************************************
4815 Buffer-text Allocation
4816 ***********************************************************************/
4819 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4820 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4821 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4822 #endif /* REL_ALLOC */
4825 /* Allocate NBYTES bytes for buffer B's text buffer. */
4828 alloc_buffer_text (b
, nbytes
)
4835 #if defined USE_MMAP_FOR_BUFFERS
4836 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4837 #elif defined REL_ALLOC
4838 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4840 p
= xmalloc (nbytes
);
4849 b
->text
->beg
= (unsigned char *) p
;
4853 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4857 enlarge_buffer_text (b
, delta
)
4862 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4865 #if defined USE_MMAP_FOR_BUFFERS
4866 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4867 #elif defined REL_ALLOC
4868 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4870 p
= xrealloc (b
->text
->beg
, nbytes
);
4879 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4884 /* Free buffer B's text buffer. */
4887 free_buffer_text (b
)
4892 #if defined USE_MMAP_FOR_BUFFERS
4893 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4894 #elif defined REL_ALLOC
4895 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4897 xfree (b
->text
->beg
);
4900 BUF_BEG_ADDR (b
) = NULL
;
4906 /***********************************************************************
4908 ***********************************************************************/
4915 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4917 /* Make sure all markable slots in buffer_defaults
4918 are initialized reasonably, so mark_buffer won't choke. */
4919 reset_buffer (&buffer_defaults
);
4920 reset_buffer_local_variables (&buffer_defaults
, 1);
4921 reset_buffer (&buffer_local_symbols
);
4922 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4923 /* Prevent GC from getting confused. */
4924 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4925 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4926 BUF_INTERVALS (&buffer_defaults
) = 0;
4927 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4928 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4929 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4931 /* Set up the default values of various buffer slots. */
4932 /* Must do these before making the first buffer! */
4934 /* real setup is done in bindings.el */
4935 buffer_defaults
.mode_line_format
= build_string ("%-");
4936 buffer_defaults
.header_line_format
= Qnil
;
4937 buffer_defaults
.abbrev_mode
= Qnil
;
4938 buffer_defaults
.overwrite_mode
= Qnil
;
4939 buffer_defaults
.case_fold_search
= Qt
;
4940 buffer_defaults
.auto_fill_function
= Qnil
;
4941 buffer_defaults
.selective_display
= Qnil
;
4943 buffer_defaults
.selective_display_ellipses
= Qt
;
4945 buffer_defaults
.abbrev_table
= Qnil
;
4946 buffer_defaults
.display_table
= Qnil
;
4947 buffer_defaults
.undo_list
= Qnil
;
4948 buffer_defaults
.mark_active
= Qnil
;
4949 buffer_defaults
.file_format
= Qnil
;
4950 buffer_defaults
.auto_save_file_format
= Qt
;
4951 buffer_defaults
.overlays_before
= NULL
;
4952 buffer_defaults
.overlays_after
= NULL
;
4953 buffer_defaults
.overlay_center
= BEG
;
4955 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4956 buffer_defaults
.truncate_lines
= Qnil
;
4957 buffer_defaults
.ctl_arrow
= Qt
;
4958 buffer_defaults
.direction_reversed
= Qnil
;
4959 buffer_defaults
.cursor_type
= Qt
;
4960 buffer_defaults
.extra_line_spacing
= Qnil
;
4963 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4965 buffer_defaults
.enable_multibyte_characters
= Qt
;
4966 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4967 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4968 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4969 buffer_defaults
.cache_long_line_scans
= Qnil
;
4970 buffer_defaults
.file_truename
= Qnil
;
4971 XSETFASTINT (buffer_defaults
.display_count
, 0);
4972 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
4973 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
4974 buffer_defaults
.left_fringe_width
= Qnil
;
4975 buffer_defaults
.right_fringe_width
= Qnil
;
4976 buffer_defaults
.fringes_outside_margins
= Qnil
;
4977 buffer_defaults
.scroll_bar_width
= Qnil
;
4978 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
4979 buffer_defaults
.indicate_empty_lines
= Qnil
;
4980 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
4981 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4982 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4983 buffer_defaults
.display_time
= Qnil
;
4985 /* Assign the local-flags to the slots that have default values.
4986 The local flag is a bit that is used in the buffer
4987 to say that it has its own local value for the slot.
4988 The local flag bits are in the local_var_flags slot of the buffer. */
4990 /* Nothing can work if this isn't true */
4991 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4993 /* 0 means not a lisp var, -1 means always local, else mask */
4994 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4995 XSETINT (buffer_local_flags
.filename
, -1);
4996 XSETINT (buffer_local_flags
.directory
, -1);
4997 XSETINT (buffer_local_flags
.backed_up
, -1);
4998 XSETINT (buffer_local_flags
.save_length
, -1);
4999 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5000 XSETINT (buffer_local_flags
.read_only
, -1);
5001 XSETINT (buffer_local_flags
.major_mode
, -1);
5002 XSETINT (buffer_local_flags
.mode_name
, -1);
5003 XSETINT (buffer_local_flags
.undo_list
, -1);
5004 XSETINT (buffer_local_flags
.mark_active
, -1);
5005 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5006 XSETINT (buffer_local_flags
.file_truename
, -1);
5007 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5008 XSETINT (buffer_local_flags
.file_format
, -1);
5009 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5010 XSETINT (buffer_local_flags
.display_count
, -1);
5011 XSETINT (buffer_local_flags
.display_time
, -1);
5012 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5015 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5016 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5017 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5018 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5019 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5020 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5022 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5024 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5025 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5026 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5027 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5028 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5029 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5030 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5032 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5033 /* Make this one a permanent local. */
5034 buffer_permanent_local_flags
[idx
++] = 1;
5036 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5037 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5038 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5039 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5040 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5041 /* Make this one a permanent local. */
5042 buffer_permanent_local_flags
[idx
++] = 1;
5043 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5044 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5045 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5046 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5047 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5048 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5049 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5050 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5051 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5052 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5053 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5054 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5055 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5056 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5058 /* Need more room? */
5059 if (idx
>= MAX_PER_BUFFER_VARS
)
5061 last_per_buffer_idx
= idx
;
5063 Vbuffer_alist
= Qnil
;
5067 QSFundamental
= build_string ("Fundamental");
5069 Qfundamental_mode
= intern ("fundamental-mode");
5070 buffer_defaults
.major_mode
= Qfundamental_mode
;
5072 Qmode_class
= intern ("mode-class");
5074 Qprotected_field
= intern ("protected-field");
5076 Qpermanent_local
= intern ("permanent-local");
5078 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5079 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5081 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5083 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5085 /* super-magic invisible buffer */
5086 Vbuffer_alist
= Qnil
;
5088 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5090 inhibit_modification_hooks
= 0;
5096 char buf
[MAXPATHLEN
+ 1];
5098 struct stat dotstat
, pwdstat
;
5102 #ifdef USE_MMAP_FOR_BUFFERS
5104 /* When using the ralloc implementation based on mmap(2), buffer
5105 text pointers will have been set to null in the dumped Emacs.
5109 for (b
= all_buffers
; b
; b
= b
->next
)
5110 if (b
->text
->beg
== NULL
)
5111 enlarge_buffer_text (b
, 0);
5113 #endif /* USE_MMAP_FOR_BUFFERS */
5115 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5116 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5117 Fset_buffer_multibyte (Qnil
);
5119 /* If PWD is accurate, use it instead of calling getwd. PWD is
5120 sometimes a nicer name, and using it may avoid a fatal error if a
5121 parent directory is searchable but not readable. */
5122 if ((pwd
= getenv ("PWD")) != 0
5123 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
5124 && stat (pwd
, &pwdstat
) == 0
5125 && stat (".", &dotstat
) == 0
5126 && dotstat
.st_ino
== pwdstat
.st_ino
5127 && dotstat
.st_dev
== pwdstat
.st_dev
5128 && strlen (pwd
) < MAXPATHLEN
)
5131 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
5132 fatal ("`getcwd' failed: %s\n", strerror (errno
));
5134 else if (getwd (buf
) == 0)
5135 fatal ("`getwd' failed: %s\n", buf
);
5139 /* Maybe this should really use some standard subroutine
5140 whose definition is filename syntax dependent. */
5142 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
5144 buf
[rc
] = DIRECTORY_SEP
;
5147 #endif /* not VMS */
5149 current_buffer
->directory
= make_unibyte_string (buf
, strlen (buf
));
5150 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5151 /* At this momemnt, we still don't know how to decode the
5152 direcotry name. So, we keep the bytes in multibyte form so
5153 that ENCODE_FILE correctly gets the original bytes. */
5154 current_buffer
->directory
5155 = string_to_multibyte (current_buffer
->directory
);
5157 /* Add /: to the front of the name
5158 if it would otherwise be treated as magic. */
5159 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5161 /* If the default dir is just /, TEMP is non-nil
5162 because of the ange-ftp completion handler.
5163 However, it is not necessary to turn / into /:/.
5164 So avoid doing that. */
5165 && strcmp ("/", SDATA (current_buffer
->directory
)))
5166 current_buffer
->directory
5167 = concat2 (build_string ("/:"), current_buffer
->directory
);
5169 temp
= get_minibuffer (0);
5170 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5173 /* initialize the buffer routines */
5177 staticpro (&last_overlay_modification_hooks
);
5178 last_overlay_modification_hooks
5179 = Fmake_vector (make_number (10), Qnil
);
5181 staticpro (&Vbuffer_defaults
);
5182 staticpro (&Vbuffer_local_symbols
);
5183 staticpro (&Qfundamental_mode
);
5184 staticpro (&Qmode_class
);
5185 staticpro (&QSFundamental
);
5186 staticpro (&Vbuffer_alist
);
5187 staticpro (&Qprotected_field
);
5188 staticpro (&Qpermanent_local
);
5189 staticpro (&Qkill_buffer_hook
);
5190 Qoverlayp
= intern ("overlayp");
5191 staticpro (&Qoverlayp
);
5192 Qevaporate
= intern ("evaporate");
5193 staticpro (&Qevaporate
);
5194 Qmodification_hooks
= intern ("modification-hooks");
5195 staticpro (&Qmodification_hooks
);
5196 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5197 staticpro (&Qinsert_in_front_hooks
);
5198 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5199 staticpro (&Qinsert_behind_hooks
);
5200 Qget_file_buffer
= intern ("get-file-buffer");
5201 staticpro (&Qget_file_buffer
);
5202 Qpriority
= intern ("priority");
5203 staticpro (&Qpriority
);
5204 Qwindow
= intern ("window");
5205 staticpro (&Qwindow
);
5206 Qbefore_string
= intern ("before-string");
5207 staticpro (&Qbefore_string
);
5208 Qafter_string
= intern ("after-string");
5209 staticpro (&Qafter_string
);
5210 Qfirst_change_hook
= intern ("first-change-hook");
5211 staticpro (&Qfirst_change_hook
);
5212 Qbefore_change_functions
= intern ("before-change-functions");
5213 staticpro (&Qbefore_change_functions
);
5214 Qafter_change_functions
= intern ("after-change-functions");
5215 staticpro (&Qafter_change_functions
);
5216 staticpro (&Qucs_set_table_for_input
);
5218 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5219 staticpro (&Qkill_buffer_query_functions
);
5221 Fput (Qprotected_field
, Qerror_conditions
,
5222 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5223 Fput (Qprotected_field
, Qerror_message
,
5224 build_string ("Attempt to modify a protected field"));
5226 /* All these use DEFVAR_LISP_NOPRO because the slots in
5227 buffer_defaults will all be marked via Vbuffer_defaults. */
5229 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5230 &buffer_defaults
.mode_line_format
,
5231 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5232 This is the same as (default-value 'mode-line-format). */);
5234 DEFVAR_LISP_NOPRO ("default-header-line-format",
5235 &buffer_defaults
.header_line_format
,
5236 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5237 This is the same as (default-value 'header-line-format). */);
5239 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5240 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5241 This is the same as (default-value 'cursor-type). */);
5243 DEFVAR_LISP_NOPRO ("default-line-spacing",
5244 &buffer_defaults
.extra_line_spacing
,
5245 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5246 This is the same as (default-value 'line-spacing). */);
5248 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5249 &buffer_defaults
.abbrev_mode
,
5250 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5251 This is the same as (default-value 'abbrev-mode). */);
5253 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5254 &buffer_defaults
.ctl_arrow
,
5255 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5256 This is the same as (default-value 'ctl-arrow). */);
5258 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5259 &buffer_defaults
.direction_reversed
,
5260 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5261 This is the same as (default-value 'direction-reversed). */);
5263 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5264 &buffer_defaults
.enable_multibyte_characters
,
5265 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5266 This is the same as (default-value 'enable-multibyte-characters). */);
5268 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5269 &buffer_defaults
.buffer_file_coding_system
,
5270 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5271 This is the same as (default-value 'buffer-file-coding-system). */);
5273 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5274 &buffer_defaults
.truncate_lines
,
5275 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5276 This is the same as (default-value 'truncate-lines). */);
5278 DEFVAR_LISP_NOPRO ("default-fill-column",
5279 &buffer_defaults
.fill_column
,
5280 doc
: /* Default value of `fill-column' for buffers that do not override it.
5281 This is the same as (default-value 'fill-column). */);
5283 DEFVAR_LISP_NOPRO ("default-left-margin",
5284 &buffer_defaults
.left_margin
,
5285 doc
: /* Default value of `left-margin' for buffers that do not override it.
5286 This is the same as (default-value 'left-margin). */);
5288 DEFVAR_LISP_NOPRO ("default-tab-width",
5289 &buffer_defaults
.tab_width
,
5290 doc
: /* Default value of `tab-width' for buffers that do not override it.
5291 This is the same as (default-value 'tab-width). */);
5293 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5294 &buffer_defaults
.case_fold_search
,
5295 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5296 This is the same as (default-value 'case-fold-search). */);
5299 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5300 &buffer_defaults
.buffer_file_type
,
5301 doc
: /* Default file type for buffers that do not override it.
5302 This is the same as (default-value 'buffer-file-type).
5303 The file type is nil for text, t for binary. */);
5306 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5307 &buffer_defaults
.left_margin_cols
,
5308 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5309 This is the same as (default-value 'left-margin-width). */);
5311 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5312 &buffer_defaults
.right_margin_cols
,
5313 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5314 This is the same as (default-value 'right-margin-width). */);
5316 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5317 &buffer_defaults
.left_fringe_width
,
5318 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5319 This is the same as (default-value 'left-fringe-width). */);
5321 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5322 &buffer_defaults
.right_fringe_width
,
5323 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5324 This is the same as (default-value 'right-fringe-width). */);
5326 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5327 &buffer_defaults
.fringes_outside_margins
,
5328 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5329 This is the same as (default-value 'fringes-outside-margins). */);
5331 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5332 &buffer_defaults
.scroll_bar_width
,
5333 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5334 This is the same as (default-value 'scroll-bar-width). */);
5336 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5337 &buffer_defaults
.vertical_scroll_bar_type
,
5338 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5339 This is the same as (default-value 'vertical-scroll-bar). */);
5341 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5342 &buffer_defaults
.indicate_empty_lines
,
5343 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5344 This is the same as (default-value 'indicate-empty-lines). */);
5346 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5347 &buffer_defaults
.indicate_buffer_boundaries
,
5348 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5349 This is the same as (default-value 'indicate-buffer-boundaries). */);
5351 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5352 &buffer_defaults
.scroll_up_aggressively
,
5353 doc
: /* Default value of `scroll-up-aggressively'.
5354 This value applies in buffers that don't have their own local values.
5355 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5357 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5358 &buffer_defaults
.scroll_down_aggressively
,
5359 doc
: /* Default value of `scroll-down-aggressively'.
5360 This value applies in buffers that don't have their own local values.
5361 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5363 DEFVAR_PER_BUFFER ("header-line-format",
5364 ¤t_buffer
->header_line_format
,
5366 doc
: /* Analogous to `mode-line-format', but controls the header line.
5367 The header line appears, optionally, at the top of a window;
5368 the mode line appears at the bottom. */);
5370 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5372 doc
: /* Template for displaying mode line for current buffer.
5373 Each buffer has its own value of this variable.
5374 Value may be nil, a string, a symbol or a list or cons cell.
5375 A value of nil means don't display a mode line.
5376 For a symbol, its value is used (but it is ignored if t or nil).
5377 A string appearing directly as the value of a symbol is processed verbatim
5378 in that the %-constructs below are not recognized.
5379 Note that unless the symbol is marked as a `risky-local-variable', all
5380 properties in any strings, as well as all :eval and :propertize forms
5381 in the value of that symbol will be ignored.
5382 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5383 is used as a mode line element. Be careful--FORM should not load any files,
5384 because that can cause an infinite recursion.
5385 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5386 with the specified properties PROPS applied.
5387 For a list whose car is a symbol, the symbol's value is taken,
5388 and if that is non-nil, the cadr of the list is processed recursively.
5389 Otherwise, the caddr of the list (if there is one) is processed.
5390 For a list whose car is a string or list, each element is processed
5391 recursively and the results are effectively concatenated.
5392 For a list whose car is an integer, the cdr of the list is processed
5393 and padded (if the number is positive) or truncated (if negative)
5394 to the width specified by that number.
5395 A string is printed verbatim in the mode line except for %-constructs:
5396 (%-constructs are allowed when the string is the entire mode-line-format
5397 or when it is found in a cons-cell or a list)
5398 %b -- print buffer name. %f -- print visited file name.
5399 %F -- print frame name.
5400 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5401 %& is like %*, but ignore read-only-ness.
5402 % means buffer is read-only and * means it is modified.
5403 For a modified read-only buffer, %* gives % and %+ gives *.
5404 %s -- print process status. %l -- print the current line number.
5405 %c -- print the current column number (this makes editing slower).
5406 To make the column number update correctly in all cases,
5407 `column-number-mode' must be non-nil.
5408 %i -- print the size of the buffer.
5409 %I -- like %i, but use k, M, G, etc., to abbreviate.
5410 %p -- print percent of buffer above top of window, or Top, Bot or All.
5411 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5412 or print Bottom or All.
5413 %m -- print the mode name.
5414 %n -- print Narrow if appropriate.
5415 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5416 %Z -- like %z, but including the end-of-line format.
5417 %[ -- print one [ for each recursive editing level. %] similar.
5418 %% -- print %. %- -- print infinitely many dashes.
5419 Decimal digits after the % specify field width to which to pad. */);
5421 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5422 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5423 nil here means use current buffer's major mode, provided it is not
5424 marked as "special".
5426 When a mode is used by default, `find-file' switches to it
5427 before it reads the contents into the buffer and before
5428 it finishes setting up the buffer. Thus, the mode and
5429 its hooks should not expect certain variables such as
5430 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5432 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5433 make_number (Lisp_Symbol
),
5434 doc
: /* Symbol for current buffer's major mode. */);
5436 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5438 doc
: /* Pretty name of current buffer's major mode (a string). */);
5440 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5441 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5443 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5445 doc
: /* *Non-nil if searches and matches should ignore case. */);
5447 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5448 make_number (Lisp_Int
),
5449 doc
: /* *Column beyond which automatic line-wrapping should happen.
5450 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5452 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5453 make_number (Lisp_Int
),
5454 doc
: /* *Column for the default indent-line-function to indent to.
5455 Linefeed indents to this column in Fundamental mode. */);
5457 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5458 make_number (Lisp_Int
),
5459 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5461 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5462 doc
: /* *Non-nil means display control chars with uparrow.
5463 A value of nil means use backslash and octal digits.
5464 This variable does not apply to characters whose display is specified
5465 in the current display table (if there is one). */);
5467 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5468 ¤t_buffer
->enable_multibyte_characters
,
5470 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5471 Otherwise they are regarded as unibyte. This affects the display,
5472 file I/O and the behavior of various editing commands.
5474 This variable is buffer-local but you cannot set it directly;
5475 use the function `set-buffer-multibyte' to change a buffer's representation.
5476 Changing its default value with `setq-default' is supported.
5477 See also variable `default-enable-multibyte-characters' and Info node
5478 `(elisp)Text Representations'. */);
5479 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5481 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5482 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5483 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5484 This variable applies to saving the buffer, and also to `write-region'
5485 and other functions that use `write-region'.
5486 It does not apply to sending output to subprocesses, however.
5488 If this is nil, the buffer is saved without any code conversion
5489 unless some coding system is specified in `file-coding-system-alist'
5490 for the buffer file.
5492 If the text to be saved cannot be encoded as specified by this variable,
5493 an alternative encoding is selected by `select-safe-coding-system', which see.
5495 The variable `coding-system-for-write', if non-nil, overrides this variable.
5497 This variable is never applied to a way of decoding a file while reading it. */);
5499 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5501 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5503 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5504 doc
: /* *Non-nil means do not display continuation lines.
5505 Instead, give each line of text just one screen line.
5507 Note that this is overridden by the variable
5508 `truncate-partial-width-windows' if that variable is non-nil
5509 and this buffer is not full-frame width. */);
5512 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5514 doc
: /* Non-nil if the visited file is a binary file.
5515 This variable is meaningful on MS-DOG and Windows NT.
5516 On those systems, it is automatically local in every buffer.
5517 On other systems, this variable is normally always nil. */);
5520 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5521 make_number (Lisp_String
),
5522 doc
: /* Name of default directory of current buffer. Should end with slash.
5523 To interactively change the default directory, use command `cd'. */);
5525 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5527 doc
: /* Function called (if non-nil) to perform auto-fill.
5528 It is called after self-inserting any character specified in
5529 the `auto-fill-chars' table.
5530 NOTE: This variable is not a hook;
5531 its value may not be a list of functions. */);
5533 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5534 make_number (Lisp_String
),
5535 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5537 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5538 make_number (Lisp_String
),
5539 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5540 The truename of a file is calculated by `file-truename'
5541 and then abbreviated with `abbreviate-file-name'. */);
5543 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5544 ¤t_buffer
->auto_save_file_name
,
5545 make_number (Lisp_String
),
5546 doc
: /* Name of file for auto-saving current buffer.
5547 If it is nil, that means don't auto-save this buffer. */);
5549 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5550 doc
: /* Non-nil if this buffer is read-only. */);
5552 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5553 doc
: /* Non-nil if this buffer's file has been backed up.
5554 Backing up is done before the first time the file is saved. */);
5556 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5557 make_number (Lisp_Int
),
5558 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5561 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5563 doc
: /* Non-nil enables selective display.
5564 An Integer N as value means display only lines
5565 that start with less than n columns of space.
5566 A value of t means that the character ^M makes itself and
5567 all the rest of the line invisible; also, when saving the buffer
5568 in a file, save the ^M as a newline. */);
5571 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5572 ¤t_buffer
->selective_display_ellipses
,
5574 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5577 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5578 doc
: /* Non-nil if self-insertion should replace existing text.
5579 The value should be one of `overwrite-mode-textual',
5580 `overwrite-mode-binary', or nil.
5581 If it is `overwrite-mode-textual', self-insertion still
5582 inserts at the end of a line, and inserts when point is before a tab,
5583 until the tab is filled in.
5584 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5586 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5588 doc
: /* Display table that controls display of the contents of current buffer.
5590 If this variable is nil, the value of `standard-display-table' is used.
5591 Each window can have its own, overriding display table, see
5592 `set-window-display-table' and `window-display-table'.
5594 The display table is a char-table created with `make-display-table'.
5595 A char-table is an array indexed by character codes. Normal array
5596 primitives `aref' and `aset' can be used to access elements of a char-table.
5598 Each of the char-table elements control how to display the corresponding
5599 text character: the element at index C in the table says how to display
5600 the character whose code is C. Each element should be a vector of
5601 characters or nil. nil means display the character in the default fashion;
5602 otherwise, the characters from the vector are delivered to the screen
5603 instead of the original character.
5605 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5606 a capital Y instead of each X character.
5608 In addition, a char-table has six extra slots to control the display of:
5610 the end of a truncated screen line (extra-slot 0, a single character);
5611 the end of a continued line (extra-slot 1, a single character);
5612 the escape character used to display character codes in octal
5613 (extra-slot 2, a single character);
5614 the character used as an arrow for control characters (extra-slot 3,
5615 a single character);
5616 the decoration indicating the presence of invisible lines (extra-slot 4,
5617 a vector of characters);
5618 the character used to draw the border between side-by-side windows
5619 (extra-slot 5, a single character).
5621 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5623 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5625 doc
: /* *Width of left marginal area for display of a buffer.
5626 A value of nil means no marginal area. */);
5628 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5630 doc
: /* *Width of right marginal area for display of a buffer.
5631 A value of nil means no marginal area. */);
5633 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5635 doc
: /* *Width of this buffer's left fringe (in pixels).
5636 A value of 0 means no left fringe is shown in this buffer's window.
5637 A value of nil means to use the left fringe width from the window's frame. */);
5639 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5641 doc
: /* *Width of this buffer's right fringe (in pixels).
5642 A value of 0 means no right fringe is shown in this buffer's window.
5643 A value of nil means to use the right fringe width from the window's frame. */);
5645 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5647 doc
: /* *Non-nil means to display fringes outside display margins.
5648 A value of nil means to display fringes between margins and buffer text. */);
5650 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5652 doc
: /* *Width of this buffer's scroll bars in pixels.
5653 A value of nil means to use the scroll bar width from the window's frame. */);
5655 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5657 doc
: /* *Position of this buffer's vertical scroll bar.
5658 The value takes effect whenever you tell a window to display this buffer;
5659 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5661 A value of `left' or `right' means put the vertical scroll bar at that side
5662 of the window; a value of nil means don't show any vertical scroll bars.
5663 A value of t (the default) means do whatever the window's frame specifies. */);
5665 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5666 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5667 doc
: /* *Visually indicate empty lines after the buffer end.
5668 If non-nil, a bitmap is displayed in the left fringe of a window on
5669 window-systems. */);
5671 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5672 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5673 doc
: /* *Visually indicate buffer boundaries and scrolling.
5674 If non-nil, the first and last line of the buffer are marked in the fringe
5675 of a window on window-systems with angle bitmaps, or if the window can be
5676 scrolled, the top and bottom line of the window are marked with up and down
5679 If value is a symbol `left' or `right', both angle and arrow bitmaps
5680 are displayed in the left or right fringe, resp. Any other value
5681 that doesn't look like an alist means display the angle bitmaps in
5682 the left fringe but no arrows.
5684 You can exercise more precise control by using an alist as the
5685 value. Each alist element (INDICATOR . POSITION) specifies
5686 where to show one of the indicators. INDICATOR is one of `top',
5687 `bottom', `up', `down', or t, which specifies the default position,
5688 and POSITION is one of `left', `right', or nil, meaning do not show
5691 For example, ((top . left) (t . right)) places the top angle bitmap in
5692 left fringe, the bottom angle bitmap in right fringe, and both arrow
5693 bitmaps in right fringe. To show just the angle bitmaps in the left
5694 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5696 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5697 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5698 doc
: /* How far to scroll windows upward.
5699 If you move point off the bottom, the window scrolls automatically.
5700 This variable controls how far it scrolls. nil, the default,
5701 means scroll to center point. A fraction means scroll to put point
5702 that fraction of the window's height from the bottom of the window.
5703 When the value is 0.0, point goes at the bottom line, which in the simple
5704 case that you moved off with C-f means scrolling just one line. 1.0 means
5705 point goes at the top, so that in that simple case, the window
5706 window scrolls by a full window height. Meaningful values are
5707 between 0.0 and 1.0, inclusive. */);
5709 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5710 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5711 doc
: /* How far to scroll windows downward.
5712 If you move point off the top, the window scrolls automatically.
5713 This variable controls how far it scrolls. nil, the default,
5714 means scroll to center point. A fraction means scroll to put point
5715 that fraction of the window's height from the top of the window.
5716 When the value is 0.0, point goes at the top line, which in the simple
5717 case that you moved off with C-b means scrolling just one line. 1.0 means
5718 point goes at the bottom, so that in that simple case, the window
5719 window scrolls by a full window height. Meaningful values are
5720 between 0.0 and 1.0, inclusive. */);
5722 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5726 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5727 doc
: /* List of functions to call before each text change.
5728 Two arguments are passed to each function: the positions of
5729 the beginning and end of the range of old text to be changed.
5730 \(For an insertion, the beginning and end are at the same place.)
5731 No information is given about the length of the text after the change.
5733 Buffer changes made while executing the `before-change-functions'
5734 don't call any before-change or after-change functions.
5735 That's because these variables are temporarily set to nil.
5736 As a result, a hook function cannot straightforwardly alter the value of
5737 these variables. See the Emacs Lisp manual for a way of
5738 accomplishing an equivalent result by using other variables.
5740 If an unhandled error happens in running these functions,
5741 the variable's value remains nil. That prevents the error
5742 from happening repeatedly and making Emacs nonfunctional. */);
5743 Vbefore_change_functions
= Qnil
;
5745 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5746 doc
: /* List of functions to call after each text change.
5747 Three arguments are passed to each function: the positions of
5748 the beginning and end of the range of changed text,
5749 and the length in bytes of the pre-change text replaced by that range.
5750 \(For an insertion, the pre-change length is zero;
5751 for a deletion, that length is the number of bytes deleted,
5752 and the post-change beginning and end are at the same place.)
5754 Buffer changes made while executing the `after-change-functions'
5755 don't call any before-change or after-change functions.
5756 That's because these variables are temporarily set to nil.
5757 As a result, a hook function cannot straightforwardly alter the value of
5758 these variables. See the Emacs Lisp manual for a way of
5759 accomplishing an equivalent result by using other variables.
5761 If an unhandled error happens in running these functions,
5762 the variable's value remains nil. That prevents the error
5763 from happening repeatedly and making Emacs nonfunctional. */);
5764 Vafter_change_functions
= Qnil
;
5766 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5767 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5768 The functions are run using the `run-hooks' function. */);
5769 Vfirst_change_hook
= Qnil
;
5771 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5772 doc
: /* List of undo entries in current buffer.
5773 Recent changes come first; older changes follow newer.
5775 An entry (BEG . END) represents an insertion which begins at
5776 position BEG and ends at position END.
5778 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5779 from (abs POSITION). If POSITION is positive, point was at the front
5780 of the text being deleted; if negative, point was at the end.
5782 An entry (t HIGH . LOW) indicates that the buffer previously had
5783 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5784 of the visited file's modification time, as of that time. If the
5785 modification time of the most recent save is different, this entry is
5788 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5789 was modified between BEG and END. PROPERTY is the property name,
5790 and VALUE is the old value.
5792 An entry (apply FUN-NAME . ARGS) means undo the change with
5793 \(apply FUN-NAME ARGS).
5795 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5796 in the active region. BEG and END is the range affected by this entry
5797 and DELTA is the number of bytes added or deleted in that range by
5800 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5801 was adjusted in position by the offset DISTANCE (an integer).
5803 An entry of the form POSITION indicates that point was at the buffer
5804 location given by the integer. Undoing an entry of this form places
5807 nil marks undo boundaries. The undo command treats the changes
5808 between two undo boundaries as a single step to be undone.
5810 If the value of the variable is t, undo information is not recorded. */);
5812 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5813 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5815 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5816 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5818 Normally, the line-motion functions work by scanning the buffer for
5819 newlines. Columnar operations (like `move-to-column' and
5820 `compute-motion') also work by scanning the buffer, summing character
5821 widths as they go. This works well for ordinary text, but if the
5822 buffer's lines are very long (say, more than 500 characters), these
5823 motion functions will take longer to execute. Emacs may also take
5824 longer to update the display.
5826 If `cache-long-line-scans' is non-nil, these motion functions cache the
5827 results of their scans, and consult the cache to avoid rescanning
5828 regions of the buffer until the text is modified. The caches are most
5829 beneficial when they prevent the most searching---that is, when the
5830 buffer contains long lines and large regions of characters with the
5831 same, fixed screen width.
5833 When `cache-long-line-scans' is non-nil, processing short lines will
5834 become slightly slower (because of the overhead of consulting the
5835 cache), and the caches will use memory roughly proportional to the
5836 number of newlines and characters whose screen width varies.
5838 The caches require no explicit maintenance; their accuracy is
5839 maintained internally by the Emacs primitives. Enabling or disabling
5840 the cache should not affect the behavior of any of the motion
5841 functions; it should only affect their performance. */);
5843 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5844 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5846 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5847 doc
: /* List of formats to use when saving this buffer.
5848 Formats are defined by `format-alist'. This variable is
5849 set when a file is visited. */);
5851 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5852 ¤t_buffer
->auto_save_file_format
, Qnil
,
5853 doc
: /* *Format in which to write auto-save files.
5854 Should be a list of symbols naming formats that are defined in `format-alist'.
5855 If it is t, which is the default, auto-save files are written in the
5856 same format as a regular save would use. */);
5858 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5859 ¤t_buffer
->invisibility_spec
, Qnil
,
5860 doc
: /* Invisibility spec of this buffer.
5861 The default is t, which means that text is invisible
5862 if it has a non-nil `invisible' property.
5863 If the value is a list, a text character is invisible if its `invisible'
5864 property is an element in that list.
5865 If an element is a cons cell of the form (PROP . ELLIPSIS),
5866 then characters with property value PROP are invisible,
5867 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5869 DEFVAR_PER_BUFFER ("buffer-display-count",
5870 ¤t_buffer
->display_count
, Qnil
,
5871 doc
: /* A number incremented each time this buffer is displayed in a window.
5872 The function `set-window-buffer' increments it. */);
5874 DEFVAR_PER_BUFFER ("buffer-display-time",
5875 ¤t_buffer
->display_time
, Qnil
,
5876 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5877 The function `set-window-buffer' updates this variable
5878 to the value obtained by calling `current-time'.
5879 If the buffer has never been shown in a window, the value is nil. */);
5881 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5882 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5883 Non-nil also enables highlighting of the region whenever the mark is active.
5884 The variable `highlight-nonselected-windows' controls whether to highlight
5885 all windows or just the selected window.
5887 If the value is `lambda', that enables Transient Mark mode temporarily
5888 until the next buffer modification. If a command sets the value to `only',
5889 that enables Transient Mark mode for the following command only.
5890 During that following command, the value of `transient-mark-mode'
5891 is `identity'. If it is still `identity' at the end of that command,
5892 it changes to nil. */);
5893 Vtransient_mark_mode
= Qnil
;
5895 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5896 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5897 If the value is t, disregard `buffer-read-only' and all `read-only'
5898 text properties. If the value is a list, disregard `buffer-read-only'
5899 and disregard a `read-only' text property if the property value
5900 is a member of the list. */);
5901 Vinhibit_read_only
= Qnil
;
5903 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5904 doc
: /* Cursor to use when this buffer is in the selected window.
5905 Values are interpreted as follows:
5907 t use the cursor specified for the frame
5908 nil don't display a cursor
5909 box display a filled box cursor
5910 hollow display a hollow box cursor
5911 bar display a vertical bar cursor with default width
5912 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5913 hbar display a horizontal bar cursor with default width
5914 (hbar . WIDTH) display a horizontal bar cursor with width WIDTH
5915 ANYTHING ELSE display a hollow box cursor.
5917 When the buffer is displayed in a nonselected window,
5918 this variable has no effect; the cursor appears as a hollow box. */);
5920 DEFVAR_PER_BUFFER ("line-spacing",
5921 ¤t_buffer
->extra_line_spacing
, Qnil
,
5922 doc
: /* Additional space to put between lines when displaying a buffer.
5923 The space is measured in pixels, and put below lines on window systems.
5924 If value is a floating point number, it specifies the spacing relative
5925 to the default frame line height. */);
5927 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5928 doc
: /* List of functions called with no args to query before killing a buffer. */);
5929 Vkill_buffer_query_functions
= Qnil
;
5931 defsubr (&Sbuffer_live_p
);
5932 defsubr (&Sbuffer_list
);
5933 defsubr (&Sget_buffer
);
5934 defsubr (&Sget_file_buffer
);
5935 defsubr (&Sget_buffer_create
);
5936 defsubr (&Smake_indirect_buffer
);
5937 defsubr (&Sgenerate_new_buffer_name
);
5938 defsubr (&Sbuffer_name
);
5939 /*defsubr (&Sbuffer_number);*/
5940 defsubr (&Sbuffer_file_name
);
5941 defsubr (&Sbuffer_base_buffer
);
5942 defsubr (&Sbuffer_local_value
);
5943 defsubr (&Sbuffer_local_variables
);
5944 defsubr (&Sbuffer_modified_p
);
5945 defsubr (&Sset_buffer_modified_p
);
5946 defsubr (&Sbuffer_modified_tick
);
5947 defsubr (&Srename_buffer
);
5948 defsubr (&Sother_buffer
);
5949 defsubr (&Sbuffer_enable_undo
);
5950 defsubr (&Skill_buffer
);
5951 defsubr (&Sset_buffer_major_mode
);
5952 defsubr (&Sswitch_to_buffer
);
5953 defsubr (&Spop_to_buffer
);
5954 defsubr (&Scurrent_buffer
);
5955 defsubr (&Sset_buffer
);
5956 defsubr (&Sbarf_if_buffer_read_only
);
5957 defsubr (&Sbury_buffer
);
5958 defsubr (&Serase_buffer
);
5959 defsubr (&Sset_buffer_multibyte
);
5960 defsubr (&Skill_all_local_variables
);
5962 defsubr (&Soverlayp
);
5963 defsubr (&Smake_overlay
);
5964 defsubr (&Sdelete_overlay
);
5965 defsubr (&Smove_overlay
);
5966 defsubr (&Soverlay_start
);
5967 defsubr (&Soverlay_end
);
5968 defsubr (&Soverlay_buffer
);
5969 defsubr (&Soverlay_properties
);
5970 defsubr (&Soverlays_at
);
5971 defsubr (&Soverlays_in
);
5972 defsubr (&Snext_overlay_change
);
5973 defsubr (&Sprevious_overlay_change
);
5974 defsubr (&Soverlay_recenter
);
5975 defsubr (&Soverlay_lists
);
5976 defsubr (&Soverlay_get
);
5977 defsubr (&Soverlay_put
);
5978 defsubr (&Srestore_buffer_modified_p
);
5984 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5985 initial_define_key (control_x_map
, 'k', "kill-buffer");
5987 /* This must not be in syms_of_buffer, because Qdisabled is not
5988 initialized when that function gets called. */
5989 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
5992 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
5993 (do not change this comment) */