1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994,
3 1995, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
25 #include <sys/types.h>
27 #include <sys/param.h>
41 #include "intervals.h"
45 #include "character.h"
46 #include "region-cache.h"
48 #include "blockinput.h"
53 struct buffer
*current_buffer
; /* the current buffer */
55 /* First buffer in chain of all buffers (in reverse order of creation).
56 Threaded through ->next. */
58 struct buffer
*all_buffers
;
60 /* This structure holds the default values of the buffer-local variables
61 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
62 The default value occupies the same slot in this structure
63 as an individual buffer's value occupies in that buffer.
64 Setting the default value also goes through the alist of buffers
65 and stores into each buffer that does not say it has a local value. */
67 DECL_ALIGN (struct buffer
, buffer_defaults
);
69 /* A Lisp_Object pointer to the above, used for staticpro */
71 static Lisp_Object Vbuffer_defaults
;
73 /* This structure marks which slots in a buffer have corresponding
74 default values in buffer_defaults.
75 Each such slot has a nonzero value in this structure.
76 The value has only one nonzero bit.
78 When a buffer has its own local value for a slot,
79 the entry for that slot (found in the same slot in this structure)
80 is turned on in the buffer's local_flags array.
82 If a slot in this structure is -1, then even though there may
83 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
84 and the corresponding slot in buffer_defaults is not used.
86 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
87 but there is a default value which is copied into each buffer.
89 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
90 zero, that is a bug */
92 struct buffer buffer_local_flags
;
94 /* This structure holds the names of symbols whose values may be
95 buffer-local. It is indexed and accessed in the same way as the above. */
97 DECL_ALIGN (struct buffer
, buffer_local_symbols
);
99 /* A Lisp_Object pointer to the above, used for staticpro */
100 static Lisp_Object Vbuffer_local_symbols
;
102 /* This structure holds the required types for the values in the
103 buffer-local slots. If a slot contains Qnil, then the
104 corresponding buffer slot may contain a value of any type. If a
105 slot contains an integer, then prospective values' tags must be
106 equal to that integer (except nil is always allowed).
107 When a tag does not match, the function
108 buffer_slot_type_mismatch will signal an error.
110 If a slot here contains -1, the corresponding variable is read-only. */
111 struct buffer buffer_local_types
;
113 /* Flags indicating which built-in buffer-local variables
114 are permanent locals. */
115 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
117 /* Number of per-buffer variables used. */
119 int last_per_buffer_idx
;
121 Lisp_Object
Fset_buffer ();
122 void set_buffer_internal ();
123 void set_buffer_internal_1 ();
124 static void call_overlay_mod_hooks ();
125 static void swap_out_buffer_local_variables ();
126 static void reset_buffer_local_variables ();
128 /* Alist of all buffer names vs the buffers. */
129 /* This used to be a variable, but is no longer,
130 to prevent lossage due to user rplac'ing this alist or its elements. */
131 Lisp_Object Vbuffer_alist
;
133 /* Functions to call before and after each text change. */
134 Lisp_Object Vbefore_change_functions
;
135 Lisp_Object Vafter_change_functions
;
137 Lisp_Object Vtransient_mark_mode
;
139 /* t means ignore all read-only text properties.
140 A list means ignore such a property if its value is a member of the list.
141 Any non-nil value means ignore buffer-read-only. */
142 Lisp_Object Vinhibit_read_only
;
144 /* List of functions to call that can query about killing a buffer.
145 If any of these functions returns nil, we don't kill it. */
146 Lisp_Object Vkill_buffer_query_functions
;
147 Lisp_Object Qkill_buffer_query_functions
;
149 /* List of functions to call before changing an unmodified buffer. */
150 Lisp_Object Vfirst_change_hook
;
152 Lisp_Object Qfirst_change_hook
;
153 Lisp_Object Qbefore_change_functions
;
154 Lisp_Object Qafter_change_functions
;
155 Lisp_Object Qucs_set_table_for_input
;
157 /* If nonzero, all modification hooks are suppressed. */
158 int inhibit_modification_hooks
;
160 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
162 Lisp_Object Qprotected_field
;
164 Lisp_Object QSFundamental
; /* A string "Fundamental" */
166 Lisp_Object Qkill_buffer_hook
;
168 Lisp_Object Qget_file_buffer
;
170 Lisp_Object Qoverlayp
;
172 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
174 Lisp_Object Qmodification_hooks
;
175 Lisp_Object Qinsert_in_front_hooks
;
176 Lisp_Object Qinsert_behind_hooks
;
178 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
179 static void free_buffer_text
P_ ((struct buffer
*b
));
180 static struct Lisp_Overlay
* copy_overlays
P_ ((struct buffer
*, struct Lisp_Overlay
*));
181 static void modify_overlay
P_ ((struct buffer
*, EMACS_INT
, EMACS_INT
));
182 static Lisp_Object buffer_lisp_local_variables
P_ ((struct buffer
*));
184 extern char * emacs_strerror
P_ ((int));
186 /* For debugging; temporary. See set_buffer_internal. */
187 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
194 error ("No buffer named %s", SDATA (spec
));
195 error ("Invalid buffer argument");
198 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
199 doc
: /* Return non-nil if OBJECT is a buffer which has not been killed.
200 Value is nil if OBJECT is not a buffer or if it has been killed. */)
204 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
208 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
209 doc
: /* Return a list of all existing live buffers.
210 If the optional arg FRAME is a frame, we return the buffer list
211 in the proper order for that frame: the buffers in FRAME's `buffer-list'
212 frame parameter come first, followed by the rest of the buffers. */)
216 Lisp_Object framelist
, general
;
217 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
225 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
227 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
229 while (! NILP (tail
))
231 general
= Fdelq (XCAR (tail
), general
);
234 return nconc2 (framelist
, general
);
240 /* Like Fassoc, but use Fstring_equal to compare
241 (which ignores text properties),
242 and don't ever QUIT. */
245 assoc_ignore_text_properties (key
, list
)
246 register Lisp_Object key
;
249 register Lisp_Object tail
;
250 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
252 register Lisp_Object elt
, tem
;
254 tem
= Fstring_equal (Fcar (elt
), key
);
261 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
262 doc
: /* Return the buffer named NAME (a string).
263 If there is no live buffer named NAME, return nil.
264 NAME may also be a buffer; if so, the value is that buffer. */)
266 register Lisp_Object name
;
272 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
275 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
276 doc
: /* Return the buffer visiting file FILENAME (a string).
277 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
278 If there is no such live buffer, return nil.
279 See also `find-buffer-visiting'. */)
281 register Lisp_Object filename
;
283 register Lisp_Object tail
, buf
, tem
;
286 CHECK_STRING (filename
);
287 filename
= Fexpand_file_name (filename
, Qnil
);
289 /* If the file name has special constructs in it,
290 call the corresponding file handler. */
291 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
293 return call2 (handler
, Qget_file_buffer
, filename
);
295 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
297 buf
= Fcdr (XCAR (tail
));
298 if (!BUFFERP (buf
)) continue;
299 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
300 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
308 get_truename_buffer (filename
)
309 register Lisp_Object filename
;
311 register Lisp_Object tail
, buf
, tem
;
313 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
315 buf
= Fcdr (XCAR (tail
));
316 if (!BUFFERP (buf
)) continue;
317 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
318 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
325 /* Incremented for each buffer created, to assign the buffer number. */
328 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
329 doc
: /* Return the buffer named NAME, or create such a buffer and return it.
330 A new buffer is created if there is no live buffer named NAME.
331 If NAME starts with a space, the new buffer does not keep undo information.
332 If NAME is a buffer instead of a string, then it is the value returned.
333 The value is never nil. */)
335 register Lisp_Object name
;
337 register Lisp_Object buf
;
338 register struct buffer
*b
;
340 buf
= Fget_buffer (name
);
344 if (SCHARS (name
) == 0)
345 error ("Empty string for buffer name is not allowed");
347 b
= (struct buffer
*) allocate_buffer ();
349 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
351 /* An ordinary buffer uses its own struct buffer_text. */
352 b
->text
= &b
->own_text
;
355 BUF_GAP_SIZE (b
) = 20;
357 /* We allocate extra 1-byte at the tail and keep it always '\0' for
358 anchoring a search. */
359 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
361 if (! BUF_BEG_ADDR (b
))
362 buffer_memory_full ();
369 BUF_PT_BYTE (b
) = BEG_BYTE
;
370 BUF_GPT_BYTE (b
) = BEG_BYTE
;
371 BUF_BEGV_BYTE (b
) = BEG_BYTE
;
372 BUF_ZV_BYTE (b
) = BEG_BYTE
;
373 BUF_Z_BYTE (b
) = BEG_BYTE
;
375 BUF_OVERLAY_MODIFF (b
) = 1;
376 BUF_SAVE_MODIFF (b
) = 1;
377 BUF_INTERVALS (b
) = 0;
378 BUF_UNCHANGED_MODIFIED (b
) = 1;
379 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
380 BUF_END_UNCHANGED (b
) = 0;
381 BUF_BEG_UNCHANGED (b
) = 0;
382 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
384 b
->newline_cache
= 0;
385 b
->width_run_cache
= 0;
386 b
->width_table
= Qnil
;
387 b
->prevent_redisplay_optimizations_p
= 1;
389 /* Put this on the chain of all buffers including killed ones. */
390 b
->next
= all_buffers
;
393 /* An ordinary buffer normally doesn't need markers
394 to handle BEGV and ZV. */
396 b
->begv_marker
= Qnil
;
399 name
= Fcopy_sequence (name
);
400 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
403 if (SREF (name
, 0) != ' ')
409 reset_buffer_local_variables (b
, 1);
411 b
->mark
= Fmake_marker ();
412 BUF_MARKERS (b
) = NULL
;
415 /* Put this in the alist of all live buffers. */
417 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
419 /* An error in calling the function here (should someone redfine it)
420 can lead to infinite regress until you run out of stack. rms
421 says that's not worth protecting against. */
422 if (!NILP (Ffboundp (Qucs_set_table_for_input
)))
423 /* buf is on buffer-alist, so no gcpro. */
424 call1 (Qucs_set_table_for_input
, buf
);
430 /* Return a list of overlays which is a copy of the overlay list
431 LIST, but for buffer B. */
433 static struct Lisp_Overlay
*
434 copy_overlays (b
, list
)
436 struct Lisp_Overlay
*list
;
439 struct Lisp_Overlay
*result
= NULL
, *tail
= NULL
;
441 XSETBUFFER (buffer
, b
);
443 for (; list
; list
= list
->next
)
445 Lisp_Object overlay
, start
, end
, old_overlay
;
448 XSETMISC (old_overlay
, list
);
449 charpos
= marker_position (OVERLAY_START (old_overlay
));
450 start
= Fmake_marker ();
451 Fset_marker (start
, make_number (charpos
), buffer
);
452 XMARKER (start
)->insertion_type
453 = XMARKER (OVERLAY_START (old_overlay
))->insertion_type
;
455 charpos
= marker_position (OVERLAY_END (old_overlay
));
456 end
= Fmake_marker ();
457 Fset_marker (end
, make_number (charpos
), buffer
);
458 XMARKER (end
)->insertion_type
459 = XMARKER (OVERLAY_END (old_overlay
))->insertion_type
;
461 overlay
= allocate_misc ();
462 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
463 OVERLAY_START (overlay
) = start
;
464 OVERLAY_END (overlay
) = end
;
465 OVERLAY_PLIST (overlay
) = Fcopy_sequence (OVERLAY_PLIST (old_overlay
));
466 XOVERLAY (overlay
)->next
= NULL
;
469 tail
= tail
->next
= XOVERLAY (overlay
);
471 result
= tail
= XOVERLAY (overlay
);
478 /* Clone per-buffer values of buffer FROM.
480 Buffer TO gets the same per-buffer values as FROM, with the
481 following exceptions: (1) TO's name is left untouched, (2) markers
482 are copied and made to refer to TO, and (3) overlay lists are
486 clone_per_buffer_values (from
, to
)
487 struct buffer
*from
, *to
;
489 Lisp_Object to_buffer
;
492 XSETBUFFER (to_buffer
, to
);
494 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
496 offset
+= sizeof (Lisp_Object
))
500 obj
= PER_BUFFER_VALUE (from
, offset
);
503 struct Lisp_Marker
*m
= XMARKER (obj
);
504 obj
= Fmake_marker ();
505 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
506 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
509 PER_BUFFER_VALUE (to
, offset
) = obj
;
512 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
514 to
->overlays_before
= copy_overlays (to
, from
->overlays_before
);
515 to
->overlays_after
= copy_overlays (to
, from
->overlays_after
);
517 /* Get (a copy of) the alist of Lisp-level local variables of FROM
518 and install that in TO. */
519 to
->local_var_alist
= buffer_lisp_local_variables (from
);
522 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
524 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
525 doc
: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
526 BASE-BUFFER should be a live buffer, or the name of an existing buffer.
527 NAME should be a string which is not the name of an existing buffer.
528 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,
529 such as major and minor modes, in the indirect buffer.
530 CLONE nil means the indirect buffer's state is reset to default values. */)
531 (base_buffer
, name
, clone
)
532 Lisp_Object base_buffer
, name
, clone
;
534 Lisp_Object buf
, tem
;
538 buf
= Fget_buffer (name
);
540 error ("Buffer name `%s' is in use", SDATA (name
));
543 base_buffer
= Fget_buffer (base_buffer
);
544 if (NILP (base_buffer
))
545 error ("No such buffer: `%s'", SDATA (tem
));
546 if (NILP (XBUFFER (base_buffer
)->name
))
547 error ("Base buffer has been killed");
549 if (SCHARS (name
) == 0)
550 error ("Empty string for buffer name is not allowed");
552 b
= (struct buffer
*) allocate_buffer ();
553 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
555 if (XBUFFER (base_buffer
)->base_buffer
)
556 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
558 b
->base_buffer
= XBUFFER (base_buffer
);
560 /* Use the base buffer's text object. */
561 b
->text
= b
->base_buffer
->text
;
563 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
564 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
565 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
566 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
567 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
568 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
570 b
->newline_cache
= 0;
571 b
->width_run_cache
= 0;
572 b
->width_table
= Qnil
;
574 /* Put this on the chain of all buffers including killed ones. */
575 b
->next
= all_buffers
;
578 name
= Fcopy_sequence (name
);
579 STRING_SET_INTERVALS (name
, NULL_INTERVAL
);
583 reset_buffer_local_variables (b
, 1);
585 /* Put this in the alist of all live buffers. */
587 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
589 b
->mark
= Fmake_marker ();
592 /* The multibyte status belongs to the base buffer. */
593 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
595 /* Make sure the base buffer has markers for its narrowing. */
596 if (NILP (b
->base_buffer
->pt_marker
))
598 b
->base_buffer
->pt_marker
= Fmake_marker ();
599 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
600 BUF_PT (b
->base_buffer
),
601 BUF_PT_BYTE (b
->base_buffer
));
603 if (NILP (b
->base_buffer
->begv_marker
))
605 b
->base_buffer
->begv_marker
= Fmake_marker ();
606 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
607 BUF_BEGV (b
->base_buffer
),
608 BUF_BEGV_BYTE (b
->base_buffer
));
610 if (NILP (b
->base_buffer
->zv_marker
))
612 b
->base_buffer
->zv_marker
= Fmake_marker ();
613 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
614 BUF_ZV (b
->base_buffer
),
615 BUF_ZV_BYTE (b
->base_buffer
));
616 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
621 /* Give the indirect buffer markers for its narrowing. */
622 b
->pt_marker
= Fmake_marker ();
623 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
624 b
->begv_marker
= Fmake_marker ();
625 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
626 b
->zv_marker
= Fmake_marker ();
627 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
628 XMARKER (b
->zv_marker
)->insertion_type
= 1;
632 struct buffer
*old_b
= current_buffer
;
634 clone_per_buffer_values (b
->base_buffer
, b
);
636 b
->file_truename
= Qnil
;
637 b
->display_count
= make_number (0);
639 b
->auto_save_file_name
= Qnil
;
640 set_buffer_internal_1 (b
);
641 Fset (intern ("buffer-save-without-query"), Qnil
);
642 Fset (intern ("buffer-file-number"), Qnil
);
643 Fset (intern ("buffer-stale-function"), Qnil
);
644 set_buffer_internal_1 (old_b
);
651 delete_all_overlays (b
)
656 /* `reset_buffer' blindly sets the list of overlays to NULL, so we
657 have to empty the list, otherwise we end up with overlays that
658 think they belong to this buffer while the buffer doesn't know about
660 while (b
->overlays_before
)
662 XSETMISC (overlay
, b
->overlays_before
);
663 Fdelete_overlay (overlay
);
665 while (b
->overlays_after
)
667 XSETMISC (overlay
, b
->overlays_after
);
668 Fdelete_overlay (overlay
);
670 eassert (b
->overlays_before
== NULL
);
671 eassert (b
->overlays_after
== NULL
);
674 /* Reinitialize everything about a buffer except its name and contents
676 If called on an already-initialized buffer, the list of overlays
677 should be deleted before calling this function, otherwise we end up
678 with overlays that claim to belong to the buffer but the buffer
679 claims it doesn't belong to it. */
683 register struct buffer
*b
;
686 b
->file_truename
= Qnil
;
687 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
689 XSETFASTINT (b
->save_length
, 0);
690 b
->last_window_start
= 1;
691 /* It is more conservative to start out "changed" than "unchanged". */
693 b
->prevent_redisplay_optimizations_p
= 1;
695 b
->auto_save_modified
= 0;
696 b
->auto_save_failure_time
= -1;
697 b
->auto_save_file_name
= Qnil
;
699 b
->overlays_before
= NULL
;
700 b
->overlays_after
= NULL
;
701 b
->overlay_center
= BEG
;
702 b
->mark_active
= Qnil
;
703 b
->point_before_scroll
= Qnil
;
704 b
->file_format
= Qnil
;
705 b
->auto_save_file_format
= Qt
;
706 b
->last_selected_window
= Qnil
;
707 XSETINT (b
->display_count
, 0);
708 b
->display_time
= Qnil
;
709 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
710 b
->cursor_type
= buffer_defaults
.cursor_type
;
711 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
713 b
->display_error_modiff
= 0;
716 /* Reset buffer B's local variables info.
717 Don't use this on a buffer that has already been in use;
718 it does not treat permanent locals consistently.
719 Instead, use Fkill_all_local_variables.
721 If PERMANENT_TOO is 1, then we reset permanent built-in
722 buffer-local variables. If PERMANENT_TOO is 0,
723 we preserve those. */
726 reset_buffer_local_variables (b
, permanent_too
)
727 register struct buffer
*b
;
733 /* Reset the major mode to Fundamental, together with all the
734 things that depend on the major mode.
735 default-major-mode is handled at a higher level.
736 We ignore it here. */
737 b
->major_mode
= Qfundamental_mode
;
739 b
->mode_name
= QSFundamental
;
740 b
->minor_modes
= Qnil
;
742 /* If the standard case table has been altered and invalidated,
743 fix up its insides first. */
744 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
745 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
746 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
747 Fset_standard_case_table (Vascii_downcase_table
);
749 b
->downcase_table
= Vascii_downcase_table
;
750 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
751 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
752 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
753 b
->invisibility_spec
= Qt
;
755 b
->buffer_file_type
= Qnil
;
758 /* Reset all (or most) per-buffer variables to their defaults. */
759 b
->local_var_alist
= Qnil
;
760 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
761 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
762 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
764 /* For each slot that has a default value,
765 copy that into the slot. */
767 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
769 offset
+= sizeof (Lisp_Object
))
771 int idx
= PER_BUFFER_IDX (offset
);
774 || buffer_permanent_local_flags
[idx
] == 0))
775 /* Is -2 used anywhere? */
777 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
781 /* We split this away from generate-new-buffer, because rename-buffer
782 and set-visited-file-name ought to be able to use this to really
783 rename the buffer properly. */
785 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
787 doc
: /* Return a string that is the name of no existing buffer based on NAME.
788 If there is no live buffer named NAME, then return NAME.
789 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
790 \(starting at 2) until an unused name is found, and then return that name.
791 Optional second argument IGNORE specifies a name that is okay to use
792 \(if it is in the sequence to be tried)
793 even if a buffer with that name exists. */)
795 register Lisp_Object name
, ignore
;
797 register Lisp_Object gentemp
, tem
;
803 tem
= Fstring_equal (name
, ignore
);
806 tem
= Fget_buffer (name
);
813 sprintf (number
, "<%d>", ++count
);
814 gentemp
= concat2 (name
, build_string (number
));
815 tem
= Fstring_equal (gentemp
, ignore
);
818 tem
= Fget_buffer (gentemp
);
825 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
826 doc
: /* Return the name of BUFFER, as a string.
827 With no argument or nil as argument, return the name of the current buffer. */)
829 register Lisp_Object buffer
;
832 return current_buffer
->name
;
833 CHECK_BUFFER (buffer
);
834 return XBUFFER (buffer
)->name
;
837 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
838 doc
: /* Return name of file BUFFER is visiting, or nil if none.
839 No argument or nil as argument means use the current buffer. */)
841 register Lisp_Object buffer
;
844 return current_buffer
->filename
;
845 CHECK_BUFFER (buffer
);
846 return XBUFFER (buffer
)->filename
;
849 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
851 doc
: /* Return the base buffer of indirect buffer BUFFER.
852 If BUFFER is not indirect, return nil.
853 BUFFER defaults to the current buffer. */)
855 register Lisp_Object buffer
;
858 Lisp_Object base_buffer
;
861 base
= current_buffer
->base_buffer
;
864 CHECK_BUFFER (buffer
);
865 base
= XBUFFER (buffer
)->base_buffer
;
870 XSETBUFFER (base_buffer
, base
);
874 DEFUN ("buffer-local-value", Fbuffer_local_value
,
875 Sbuffer_local_value
, 2, 2, 0,
876 doc
: /* Return the value of VARIABLE in BUFFER.
877 If VARIABLE does not have a buffer-local binding in BUFFER, the value
878 is the default binding of the variable. */)
880 register Lisp_Object variable
;
881 register Lisp_Object buffer
;
883 register struct buffer
*buf
;
884 register Lisp_Object result
;
886 CHECK_SYMBOL (variable
);
887 CHECK_BUFFER (buffer
);
888 buf
= XBUFFER (buffer
);
890 if (SYMBOLP (variable
))
891 variable
= indirect_variable (variable
);
893 /* Look in local_var_list */
894 result
= Fassoc (variable
, buf
->local_var_alist
);
900 /* Look in special slots */
901 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
902 offset
< sizeof (struct buffer
);
903 /* sizeof EMACS_INT == sizeof Lisp_Object */
904 offset
+= (sizeof (EMACS_INT
)))
906 idx
= PER_BUFFER_IDX (offset
);
907 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
908 && SYMBOLP (PER_BUFFER_SYMBOL (offset
))
909 && EQ (PER_BUFFER_SYMBOL (offset
), variable
))
911 result
= PER_BUFFER_VALUE (buf
, offset
);
918 result
= Fdefault_value (variable
);
922 Lisp_Object valcontents
;
923 Lisp_Object current_alist_element
;
925 /* What binding is loaded right now? */
926 valcontents
= SYMBOL_VALUE (variable
);
927 current_alist_element
928 = XCAR (XBUFFER_LOCAL_VALUE (valcontents
)->cdr
);
930 /* The value of the currently loaded binding is not
931 stored in it, but rather in the realvalue slot.
932 Store that value into the binding it belongs to
933 in case that is the one we are about to use. */
935 Fsetcdr (current_alist_element
,
936 do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
));
938 /* Now get the (perhaps updated) value out of the binding. */
939 result
= XCDR (result
);
942 if (EQ (result
, Qunbound
))
943 return Fsignal (Qvoid_variable
, Fcons (variable
, Qnil
));
948 /* Return an alist of the Lisp-level buffer-local bindings of
949 buffer BUF. That is, don't include the variables maintained
950 in special slots in the buffer object. */
953 buffer_lisp_local_variables (buf
)
956 Lisp_Object result
= Qnil
;
957 register Lisp_Object tail
;
958 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
960 Lisp_Object val
, elt
;
964 /* Reference each variable in the alist in buf.
965 If inquiring about the current buffer, this gets the current values,
966 so store them into the alist so the alist is up to date.
967 If inquiring about some other buffer, this swaps out any values
968 for that buffer, making the alist up to date automatically. */
969 val
= find_symbol_value (XCAR (elt
));
970 /* Use the current buffer value only if buf is the current buffer. */
971 if (buf
!= current_buffer
)
974 /* If symbol is unbound, put just the symbol in the list. */
975 if (EQ (val
, Qunbound
))
976 result
= Fcons (XCAR (elt
), result
);
977 /* Otherwise, put (symbol . value) in the list. */
979 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
985 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
986 Sbuffer_local_variables
, 0, 1, 0,
987 doc
: /* Return an alist of variables that are buffer-local in BUFFER.
988 Most elements look like (SYMBOL . VALUE), describing one variable.
989 For a symbol that is locally unbound, just the symbol appears in the value.
990 Note that storing new VALUEs in these elements doesn't change the variables.
991 No argument or nil as argument means use current buffer as BUFFER. */)
993 register Lisp_Object buffer
;
995 register struct buffer
*buf
;
996 register Lisp_Object result
;
999 buf
= current_buffer
;
1002 CHECK_BUFFER (buffer
);
1003 buf
= XBUFFER (buffer
);
1006 result
= buffer_lisp_local_variables (buf
);
1008 /* Add on all the variables stored in special slots. */
1012 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
1013 offset
< sizeof (struct buffer
);
1014 /* sizeof EMACS_INT == sizeof Lisp_Object */
1015 offset
+= (sizeof (EMACS_INT
)))
1017 idx
= PER_BUFFER_IDX (offset
);
1018 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
1019 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
1020 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
1021 PER_BUFFER_VALUE (buf
, offset
)),
1029 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
1031 doc
: /* Return t if BUFFER was modified since its file was last read or saved.
1032 No argument or nil as argument means use current buffer as BUFFER. */)
1034 register Lisp_Object buffer
;
1036 register struct buffer
*buf
;
1038 buf
= current_buffer
;
1041 CHECK_BUFFER (buffer
);
1042 buf
= XBUFFER (buffer
);
1045 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
1048 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
1050 doc
: /* Mark current buffer as modified or unmodified according to FLAG.
1051 A non-nil FLAG means mark the buffer modified. */)
1053 register Lisp_Object flag
;
1055 register int already
;
1056 register Lisp_Object fn
;
1057 Lisp_Object buffer
, window
;
1059 #ifdef CLASH_DETECTION
1060 /* If buffer becoming modified, lock the file.
1061 If buffer becoming unmodified, unlock the file. */
1063 fn
= current_buffer
->file_truename
;
1064 /* Test buffer-file-name so that binding it to nil is effective. */
1065 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1067 already
= SAVE_MODIFF
< MODIFF
;
1068 if (!already
&& !NILP (flag
))
1070 else if (already
&& NILP (flag
))
1073 #endif /* CLASH_DETECTION */
1075 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1077 /* Set update_mode_lines only if buffer is displayed in some window.
1078 Packages like jit-lock or lazy-lock preserve a buffer's modified
1079 state by recording/restoring the state around blocks of code.
1080 Setting update_mode_lines makes redisplay consider all windows
1081 (on all frames). Stealth fontification of buffers not displayed
1082 would incur additional redisplay costs if we'd set
1083 update_modes_lines unconditionally.
1085 Ideally, I think there should be another mechanism for fontifying
1086 buffers without "modifying" buffers, or redisplay should be
1087 smarter about updating the `*' in mode lines. --gerd */
1088 XSETBUFFER (buffer
, current_buffer
);
1089 window
= Fget_buffer_window (buffer
, Qt
);
1090 if (WINDOWP (window
))
1092 ++update_mode_lines
;
1093 current_buffer
->prevent_redisplay_optimizations_p
= 1;
1099 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
1100 Srestore_buffer_modified_p
, 1, 1, 0,
1101 doc
: /* Like `set-buffer-modified-p', with a difference concerning redisplay.
1102 It is not ensured that mode lines will be updated to show the modified
1103 state of the current buffer. Use with care. */)
1107 #ifdef CLASH_DETECTION
1110 /* If buffer becoming modified, lock the file.
1111 If buffer becoming unmodified, unlock the file. */
1113 fn
= current_buffer
->file_truename
;
1114 /* Test buffer-file-name so that binding it to nil is effective. */
1115 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
1117 int already
= SAVE_MODIFF
< MODIFF
;
1118 if (!already
&& !NILP (flag
))
1120 else if (already
&& NILP (flag
))
1123 #endif /* CLASH_DETECTION */
1125 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
1129 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
1131 doc
: /* Return BUFFER's tick counter, incremented for each change in text.
1132 Each buffer has a tick counter which is incremented each time the text in
1133 that buffer is changed. It wraps around occasionally.
1134 No argument or nil as argument means use current buffer as BUFFER. */)
1136 register Lisp_Object buffer
;
1138 register struct buffer
*buf
;
1140 buf
= current_buffer
;
1143 CHECK_BUFFER (buffer
);
1144 buf
= XBUFFER (buffer
);
1147 return make_number (BUF_MODIFF (buf
));
1150 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
1151 "sRename buffer (to new name): \nP",
1152 doc
: /* Change current buffer's name to NEWNAME (a string).
1153 If second arg UNIQUE is nil or omitted, it is an error if a
1154 buffer named NEWNAME already exists.
1155 If UNIQUE is non-nil, come up with a new name using
1156 `generate-new-buffer-name'.
1157 Interactively, you can set UNIQUE with a prefix argument.
1158 We return the name we actually gave the buffer.
1159 This does not change the name of the visited file (if any). */)
1161 register Lisp_Object newname
, unique
;
1163 register Lisp_Object tem
, buf
;
1165 CHECK_STRING (newname
);
1167 if (SCHARS (newname
) == 0)
1168 error ("Empty string is invalid as a buffer name");
1170 tem
= Fget_buffer (newname
);
1173 /* Don't short-circuit if UNIQUE is t. That is a useful way to
1174 rename the buffer automatically so you can create another
1175 with the original name. It makes UNIQUE equivalent to
1176 (rename-buffer (generate-new-buffer-name NEWNAME)). */
1177 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
1178 return current_buffer
->name
;
1180 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
1182 error ("Buffer name `%s' is in use", SDATA (newname
));
1185 current_buffer
->name
= newname
;
1187 /* Catch redisplay's attention. Unless we do this, the mode lines for
1188 any windows displaying current_buffer will stay unchanged. */
1189 update_mode_lines
++;
1191 XSETBUFFER (buf
, current_buffer
);
1192 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
1193 if (NILP (current_buffer
->filename
)
1194 && !NILP (current_buffer
->auto_save_file_name
))
1195 call0 (intern ("rename-auto-save-file"));
1196 /* Refetch since that last call may have done GC. */
1197 return current_buffer
->name
;
1200 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1201 doc
: /* Return most recently selected buffer other than BUFFER.
1202 Buffers not visible in windows are preferred to visible buffers,
1203 unless optional second argument VISIBLE-OK is non-nil.
1204 If the optional third argument FRAME is non-nil, use that frame's
1205 buffer list instead of the selected frame's buffer list.
1206 If no other buffer exists, the buffer `*scratch*' is returned.
1207 If BUFFER is omitted or nil, some interesting buffer is returned. */)
1208 (buffer
, visible_ok
, frame
)
1209 register Lisp_Object buffer
, visible_ok
, frame
;
1211 Lisp_Object
Fset_buffer_major_mode ();
1212 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1216 frame
= selected_frame
;
1218 tail
= Vbuffer_alist
;
1219 pred
= frame_buffer_predicate (frame
);
1221 /* Consider buffers that have been seen in the selected frame
1222 before other buffers. */
1224 tem
= frame_buffer_list (frame
);
1228 if (BUFFERP (XCAR (tem
)))
1229 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1232 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1234 for (; CONSP (tail
); tail
= XCDR (tail
))
1236 buf
= Fcdr (XCAR (tail
));
1237 if (EQ (buf
, buffer
))
1241 if (NILP (XBUFFER (buf
)->name
))
1243 if (SREF (XBUFFER (buf
)->name
, 0) == ' ')
1245 /* If the selected frame has a buffer_predicate,
1246 disregard buffers that don't fit the predicate. */
1249 tem
= call1 (pred
, buf
);
1254 if (NILP (visible_ok
))
1255 tem
= Fget_buffer_window (buf
, Qvisible
);
1260 if (NILP (notsogood
))
1263 if (!NILP (notsogood
))
1265 buf
= Fget_buffer (build_string ("*scratch*"));
1268 buf
= Fget_buffer_create (build_string ("*scratch*"));
1269 Fset_buffer_major_mode (buf
);
1274 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1276 doc
: /* Start keeping undo information for buffer BUFFER.
1277 No argument or nil as argument means do this for the current buffer. */)
1279 register Lisp_Object buffer
;
1281 Lisp_Object real_buffer
;
1284 XSETBUFFER (real_buffer
, current_buffer
);
1287 real_buffer
= Fget_buffer (buffer
);
1288 if (NILP (real_buffer
))
1292 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1293 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1299 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1300 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1301 The buffer being killed will be current while the hook is running.\n\
1304 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1305 doc
: /* Kill the buffer BUFFER.
1306 The argument may be a buffer or may be the name of a buffer.
1307 An argument of nil means kill the current buffer.
1309 Value is t if the buffer is actually killed, nil if user says no.
1311 The value of `kill-buffer-hook' (which may be local to that buffer),
1312 if not void, is a list of functions to be called, with no arguments,
1313 before the buffer is actually killed. The buffer to be killed is current
1314 when the hook functions are called.
1316 Any processes that have this buffer as the `process-buffer' are killed
1322 register struct buffer
*b
;
1323 register Lisp_Object tem
;
1324 register struct Lisp_Marker
*m
;
1325 struct gcpro gcpro1
;
1328 buf
= Fcurrent_buffer ();
1330 buf
= Fget_buffer (buffer
);
1336 /* Avoid trouble for buffer already dead. */
1340 /* Query if the buffer is still modified. */
1341 if (INTERACTIVE
&& !NILP (b
->filename
)
1342 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1345 tem
= do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ",
1346 b
->name
, make_number (0)));
1352 /* Run hooks with the buffer to be killed the current buffer. */
1354 int count
= SPECPDL_INDEX ();
1355 Lisp_Object arglist
[1];
1357 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1358 set_buffer_internal (b
);
1360 /* First run the query functions; if any query is answered no,
1361 don't kill the buffer. */
1362 arglist
[0] = Qkill_buffer_query_functions
;
1363 tem
= Frun_hook_with_args_until_failure (1, arglist
);
1365 return unbind_to (count
, Qnil
);
1367 /* Then run the hooks. */
1368 Frun_hooks (1, &Qkill_buffer_hook
);
1369 unbind_to (count
, Qnil
);
1372 /* We have no more questions to ask. Verify that it is valid
1373 to kill the buffer. This must be done after the questions
1374 since anything can happen within do_yes_or_no_p. */
1376 /* Don't kill the minibuffer now current. */
1377 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1383 /* When we kill a base buffer, kill all its indirect buffers.
1384 We do it at this stage so nothing terrible happens if they
1385 ask questions or their hooks get errors. */
1386 if (! b
->base_buffer
)
1388 struct buffer
*other
;
1392 for (other
= all_buffers
; other
; other
= other
->next
)
1393 /* all_buffers contains dead buffers too;
1394 don't re-kill them. */
1395 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1398 XSETBUFFER (buf
, other
);
1405 /* Make this buffer not be current.
1406 In the process, notice if this is the sole visible buffer
1407 and give up if so. */
1408 if (b
== current_buffer
)
1410 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1412 if (b
== current_buffer
)
1416 /* Notice if the buffer to kill is the sole visible buffer
1417 when we're currently in the mini-buffer, and give up if so. */
1418 XSETBUFFER (tem
, current_buffer
);
1419 if (EQ (tem
, XWINDOW (minibuf_window
)->buffer
))
1421 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1426 /* Now there is no question: we can kill the buffer. */
1428 #ifdef CLASH_DETECTION
1429 /* Unlock this buffer's file, if it is locked. */
1431 #endif /* CLASH_DETECTION */
1433 kill_buffer_processes (buf
);
1434 clear_charpos_cache (b
);
1436 tem
= Vinhibit_quit
;
1438 replace_buffer_in_all_windows (buf
);
1439 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1440 frames_discard_buffer (buf
);
1441 Vinhibit_quit
= tem
;
1443 /* Delete any auto-save file, if we saved it in this session.
1444 But not if the buffer is modified. */
1445 if (STRINGP (b
->auto_save_file_name
)
1446 && b
->auto_save_modified
!= 0
1447 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
1448 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
1449 && NILP (Fsymbol_value (intern ("auto-save-visited-file-name"))))
1452 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1454 internal_delete_file (b
->auto_save_file_name
);
1459 /* Unchain all markers that belong to this indirect buffer.
1460 Don't unchain the markers that belong to the base buffer
1461 or its other indirect buffers. */
1462 for (m
= BUF_MARKERS (b
); m
; )
1464 struct Lisp_Marker
*next
= m
->next
;
1472 /* Unchain all markers of this buffer and its indirect buffers.
1473 and leave them pointing nowhere. */
1474 for (m
= BUF_MARKERS (b
); m
; )
1476 struct Lisp_Marker
*next
= m
->next
;
1481 BUF_MARKERS (b
) = NULL
;
1482 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1484 /* Perhaps we should explicitly free the interval tree here... */
1487 /* Reset the local variables, so that this buffer's local values
1488 won't be protected from GC. They would be protected
1489 if they happened to remain encached in their symbols.
1490 This gets rid of them for certain. */
1491 swap_out_buffer_local_variables (b
);
1492 reset_buffer_local_variables (b
, 1);
1497 if (! b
->base_buffer
)
1498 free_buffer_text (b
);
1500 if (b
->newline_cache
)
1502 free_region_cache (b
->newline_cache
);
1503 b
->newline_cache
= 0;
1505 if (b
->width_run_cache
)
1507 free_region_cache (b
->width_run_cache
);
1508 b
->width_run_cache
= 0;
1510 b
->width_table
= Qnil
;
1512 b
->undo_list
= Qnil
;
1517 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1518 we do this each time BUF is selected visibly, the more recently
1519 selected buffers are always closer to the front of the list. This
1520 means that other_buffer is more likely to choose a relevant buffer. */
1526 register Lisp_Object link
, prev
;
1528 frame
= selected_frame
;
1531 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1533 if (EQ (XCDR (XCAR (link
)), buf
))
1538 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1539 we cannot use Fdelq itself here because it allows quitting. */
1542 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1544 XSETCDR (prev
, XCDR (XCDR (prev
)));
1546 XSETCDR (link
, Vbuffer_alist
);
1547 Vbuffer_alist
= link
;
1549 /* Now move this buffer to the front of frame_buffer_list also. */
1552 for (link
= frame_buffer_list (frame
); CONSP (link
);
1555 if (EQ (XCAR (link
), buf
))
1560 /* Effectively do delq. */
1565 set_frame_buffer_list (frame
,
1566 XCDR (frame_buffer_list (frame
)));
1568 XSETCDR (prev
, XCDR (XCDR (prev
)));
1570 XSETCDR (link
, frame_buffer_list (frame
));
1571 set_frame_buffer_list (frame
, link
);
1574 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1577 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1578 doc
: /* Set an appropriate major mode for BUFFER.
1579 For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode
1580 according to `default-major-mode'.
1581 Use this function before selecting the buffer, since it may need to inspect
1582 the current buffer's major mode. */)
1587 Lisp_Object function
;
1589 if (STRINGP (XBUFFER (buffer
)->name
)
1590 && strcmp (SDATA (XBUFFER (buffer
)->name
), "*scratch*") == 0)
1591 function
= find_symbol_value (intern ("initial-major-mode"));
1594 function
= buffer_defaults
.major_mode
;
1596 && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1597 function
= current_buffer
->major_mode
;
1600 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1603 count
= SPECPDL_INDEX ();
1605 /* To select a nonfundamental mode,
1606 select the buffer temporarily and then call the mode function. */
1608 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1610 Fset_buffer (buffer
);
1613 return unbind_to (count
, Qnil
);
1616 /* If switching buffers in WINDOW would be an error, return
1617 a C string saying what the error would be. */
1620 no_switch_window (window
)
1624 if (EQ (minibuf_window
, window
))
1625 return "Cannot switch buffers in minibuffer window";
1626 tem
= Fwindow_dedicated_p (window
);
1628 return "Cannot switch buffers in a dedicated window";
1632 /* Switch to buffer BUFFER in the selected window.
1633 If NORECORD is non-nil, don't call record_buffer. */
1636 switch_to_buffer_1 (buffer
, norecord
)
1637 Lisp_Object buffer
, norecord
;
1639 register Lisp_Object buf
;
1642 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1645 buf
= Fget_buffer (buffer
);
1648 buf
= Fget_buffer_create (buffer
);
1649 Fset_buffer_major_mode (buf
);
1653 if (NILP (norecord
))
1654 record_buffer (buf
);
1656 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1657 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1664 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1665 doc
: /* Select buffer BUFFER in the current window.
1666 If BUFFER does not identify an existing buffer,
1667 then this function creates a buffer with that name.
1669 When called from Lisp, BUFFER may be a buffer, a string \(a buffer name),
1670 or nil. If BUFFER is nil, then this function chooses a buffer
1671 using `other-buffer'.
1672 Optional second arg NORECORD non-nil means
1673 do not put this buffer at the front of the list of recently selected ones.
1674 This function returns the buffer it switched to.
1676 WARNING: This is NOT the way to work on another buffer temporarily
1677 within a Lisp program! Use `set-buffer' instead. That avoids messing with
1678 the window-buffer correspondences. */)
1680 Lisp_Object buffer
, norecord
;
1684 if (EQ (buffer
, Fwindow_buffer (selected_window
)))
1685 /* Basically a NOP. Avoid signalling an error if the selected window
1686 is dedicated, or a minibuffer, ... */
1687 return Fset_buffer (buffer
);
1689 err
= no_switch_window (selected_window
);
1690 if (err
) error (err
);
1692 return switch_to_buffer_1 (buffer
, norecord
);
1695 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1696 doc
: /* Select buffer BUFFER in some window, preferably a different one.
1697 BUFFER may be a buffer, a string \(a buffer name), or nil.
1698 If BUFFER is a string which is not the name of an existing buffer,
1699 then this function creates a buffer with that name.
1700 If BUFFER is nil, then it chooses some other buffer.
1701 If `pop-up-windows' is non-nil, windows can be split to do this.
1702 If optional second arg OTHER-WINDOW is non-nil, insist on finding another
1703 window even if BUFFER is already visible in the selected window,
1704 and ignore `same-window-regexps' and `same-window-buffer-names'.
1705 This function returns the buffer it switched to.
1706 This uses the function `display-buffer' as a subroutine; see the documentation
1707 of `display-buffer' for additional customization information.
1709 Optional third arg NORECORD non-nil means
1710 do not put this buffer at the front of the list of recently selected ones. */)
1711 (buffer
, other_window
, norecord
)
1712 Lisp_Object buffer
, other_window
, norecord
;
1714 register Lisp_Object buf
;
1716 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1719 buf
= Fget_buffer (buffer
);
1722 buf
= Fget_buffer_create (buffer
);
1723 Fset_buffer_major_mode (buf
);
1727 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
), norecord
);
1731 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1732 doc
: /* Return the current buffer as a Lisp object. */)
1735 register Lisp_Object buf
;
1736 XSETBUFFER (buf
, current_buffer
);
1740 /* Set the current buffer to B.
1742 We previously set windows_or_buffers_changed here to invalidate
1743 global unchanged information in beg_unchanged and end_unchanged.
1744 This is no longer necessary because we now compute unchanged
1745 information on a buffer-basis. Every action affecting other
1746 windows than the selected one requires a select_window at some
1747 time, and that increments windows_or_buffers_changed. */
1750 set_buffer_internal (b
)
1751 register struct buffer
*b
;
1753 if (current_buffer
!= b
)
1754 set_buffer_internal_1 (b
);
1757 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1758 This is used by redisplay. */
1761 set_buffer_internal_1 (b
)
1762 register struct buffer
*b
;
1764 register struct buffer
*old_buf
;
1765 register Lisp_Object tail
, valcontents
;
1768 #ifdef USE_MMAP_FOR_BUFFERS
1769 if (b
->text
->beg
== NULL
)
1770 enlarge_buffer_text (b
, 0);
1771 #endif /* USE_MMAP_FOR_BUFFERS */
1773 if (current_buffer
== b
)
1776 old_buf
= current_buffer
;
1778 last_known_column_point
= -1; /* invalidate indentation cache */
1782 /* Put the undo list back in the base buffer, so that it appears
1783 that an indirect buffer shares the undo list of its base. */
1784 if (old_buf
->base_buffer
)
1785 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1787 /* If the old current buffer has markers to record PT, BEGV and ZV
1788 when it is not current, update them now. */
1789 if (! NILP (old_buf
->pt_marker
))
1792 XSETBUFFER (obuf
, old_buf
);
1793 set_marker_both (old_buf
->pt_marker
, obuf
,
1794 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1796 if (! NILP (old_buf
->begv_marker
))
1799 XSETBUFFER (obuf
, old_buf
);
1800 set_marker_both (old_buf
->begv_marker
, obuf
,
1801 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1803 if (! NILP (old_buf
->zv_marker
))
1806 XSETBUFFER (obuf
, old_buf
);
1807 set_marker_both (old_buf
->zv_marker
, obuf
,
1808 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1812 /* Get the undo list from the base buffer, so that it appears
1813 that an indirect buffer shares the undo list of its base. */
1815 b
->undo_list
= b
->base_buffer
->undo_list
;
1817 /* If the new current buffer has markers to record PT, BEGV and ZV
1818 when it is not current, fetch them now. */
1819 if (! NILP (b
->pt_marker
))
1821 BUF_PT (b
) = marker_position (b
->pt_marker
);
1822 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1824 if (! NILP (b
->begv_marker
))
1826 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1827 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1829 if (! NILP (b
->zv_marker
))
1831 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1832 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1835 /* Look down buffer's list of local Lisp variables
1836 to find and update any that forward into C variables. */
1838 for (tail
= b
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1840 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1841 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1842 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1843 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1844 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1845 /* Just reference the variable
1846 to cause it to become set for this buffer. */
1847 Fsymbol_value (XCAR (XCAR (tail
)));
1850 /* Do the same with any others that were local to the previous buffer */
1853 for (tail
= old_buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
1855 valcontents
= SYMBOL_VALUE (XCAR (XCAR (tail
)));
1856 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1857 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1858 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1859 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1860 /* Just reference the variable
1861 to cause it to become set for this buffer. */
1862 Fsymbol_value (XCAR (XCAR (tail
)));
1866 /* Switch to buffer B temporarily for redisplay purposes.
1867 This avoids certain things that don't need to be done within redisplay. */
1873 register struct buffer
*old_buf
;
1875 if (current_buffer
== b
)
1878 old_buf
= current_buffer
;
1883 /* If the old current buffer has markers to record PT, BEGV and ZV
1884 when it is not current, update them now. */
1885 if (! NILP (old_buf
->pt_marker
))
1888 XSETBUFFER (obuf
, old_buf
);
1889 set_marker_both (old_buf
->pt_marker
, obuf
,
1890 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1892 if (! NILP (old_buf
->begv_marker
))
1895 XSETBUFFER (obuf
, old_buf
);
1896 set_marker_both (old_buf
->begv_marker
, obuf
,
1897 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1899 if (! NILP (old_buf
->zv_marker
))
1902 XSETBUFFER (obuf
, old_buf
);
1903 set_marker_both (old_buf
->zv_marker
, obuf
,
1904 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1908 /* If the new current buffer has markers to record PT, BEGV and ZV
1909 when it is not current, fetch them now. */
1910 if (! NILP (b
->pt_marker
))
1912 BUF_PT (b
) = marker_position (b
->pt_marker
);
1913 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1915 if (! NILP (b
->begv_marker
))
1917 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1918 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1920 if (! NILP (b
->zv_marker
))
1922 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1923 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1927 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1928 doc
: /* Make the buffer BUFFER current for editing operations.
1929 BUFFER may be a buffer or the name of an existing buffer.
1930 See also `save-excursion' when you want to make a buffer current temporarily.
1931 This function does not display the buffer, so its effect ends
1932 when the current command terminates.
1933 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */)
1935 register Lisp_Object buffer
;
1937 register Lisp_Object buf
;
1938 buf
= Fget_buffer (buffer
);
1941 if (NILP (XBUFFER (buf
)->name
))
1942 error ("Selecting deleted buffer");
1943 set_buffer_internal (XBUFFER (buf
));
1947 /* Set the current buffer to BUFFER provided it is alive. */
1950 set_buffer_if_live (buffer
)
1953 if (! NILP (XBUFFER (buffer
)->name
))
1954 Fset_buffer (buffer
);
1958 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1959 Sbarf_if_buffer_read_only
, 0, 0, 0,
1960 doc
: /* Signal a `buffer-read-only' error if the current buffer is read-only. */)
1963 if (!NILP (current_buffer
->read_only
)
1964 && NILP (Vinhibit_read_only
))
1965 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1969 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1970 doc
: /* Put BUFFER at the end of the list of all buffers.
1971 There it is the least likely candidate for `other-buffer' to return;
1972 thus, the least likely buffer for \\[switch-to-buffer] to select by default.
1973 You can specify a buffer name as BUFFER, or an actual buffer object.
1974 If BUFFER is nil or omitted, bury the current buffer.
1975 Also, if BUFFER is nil or omitted, remove the current buffer from the
1976 selected window if it is displayed there. */)
1978 register Lisp_Object buffer
;
1980 /* Figure out what buffer we're going to bury. */
1984 XSETBUFFER (buffer
, current_buffer
);
1986 tem
= Fwindow_buffer (selected_window
);
1987 /* If we're burying the current buffer, unshow it. */
1988 if (EQ (buffer
, tem
))
1990 if (NILP (Fwindow_dedicated_p (selected_window
)))
1991 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1992 else if (NILP (XWINDOW (selected_window
)->parent
))
1993 Ficonify_frame (Fwindow_frame (selected_window
));
1995 Fdelete_window (selected_window
);
2002 buf1
= Fget_buffer (buffer
);
2008 /* Move buffer to the end of the buffer list. Do nothing if the
2009 buffer is killed. */
2010 if (!NILP (XBUFFER (buffer
)->name
))
2012 Lisp_Object aelt
, link
;
2014 aelt
= Frassq (buffer
, Vbuffer_alist
);
2015 link
= Fmemq (aelt
, Vbuffer_alist
);
2016 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
2017 XSETCDR (link
, Qnil
);
2018 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
2020 /* Removing BUFFER from frame-specific lists
2021 has the effect of putting BUFFER at the end
2022 of the combined list in each frame. */
2023 frames_discard_buffer (buffer
);
2029 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
2030 doc
: /* Delete the entire contents of the current buffer.
2031 Any narrowing restriction in effect (see `narrow-to-region') is removed,
2032 so the buffer is truly empty after this. */)
2039 current_buffer
->last_window_start
= 1;
2040 /* Prevent warnings, or suspension of auto saving, that would happen
2041 if future size is less than past size. Use of erase-buffer
2042 implies that the future text is not really related to the past text. */
2043 XSETFASTINT (current_buffer
->save_length
, 0);
2048 validate_region (b
, e
)
2049 register Lisp_Object
*b
, *e
;
2051 CHECK_NUMBER_COERCE_MARKER (*b
);
2052 CHECK_NUMBER_COERCE_MARKER (*e
);
2054 if (XINT (*b
) > XINT (*e
))
2057 tem
= *b
; *b
= *e
; *e
= tem
;
2060 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
2061 && XINT (*e
) <= ZV
))
2062 args_out_of_range (*b
, *e
);
2065 /* Advance BYTE_POS up to a character boundary
2066 and return the adjusted position. */
2069 advance_to_char_boundary (byte_pos
)
2074 if (byte_pos
== BEG
)
2075 /* Beginning of buffer is always a character boundary. */
2078 c
= FETCH_BYTE (byte_pos
);
2079 if (! CHAR_HEAD_P (c
))
2081 /* We should advance BYTE_POS only when C is a constituent of a
2082 multibyte sequence. */
2083 int orig_byte_pos
= byte_pos
;
2088 c
= FETCH_BYTE (byte_pos
);
2090 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
2092 if (byte_pos
< orig_byte_pos
)
2093 byte_pos
= orig_byte_pos
;
2094 /* If C is a constituent of a multibyte sequence, BYTE_POS was
2095 surely advance to the correct character boundary. If C is
2096 not, BYTE_POS was unchanged. */
2102 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
2104 doc
: /* Set the multibyte flag of the current buffer to FLAG.
2105 If FLAG is t, this makes the buffer a multibyte buffer.
2106 If FLAG is nil, this makes the buffer a single-byte buffer.
2107 In these cases, the buffer contents remain unchanged as a sequence of
2108 bytes but the contents viewed as characters do change.
2109 If FLAG is `to', this makes the buffer a multibyte buffer by changing
2110 all eight-bit bytes to eight-bit characters.
2111 If the multibyte flag was really changed, undo information of the
2112 current buffer is cleared. */)
2116 struct Lisp_Marker
*tail
, *markers
;
2117 struct buffer
*other
;
2118 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
2120 int narrowed
= (BEG
!= BEGV
|| Z
!= ZV
);
2121 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
2123 if (current_buffer
->base_buffer
)
2124 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
2126 /* Do nothing if nothing actually changes. */
2127 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
2130 /* It would be better to update the list,
2131 but this is good enough for now. */
2133 current_buffer
->undo_list
= Qt
;
2135 /* If the cached position is for this buffer, clear it out. */
2136 clear_charpos_cache (current_buffer
);
2139 begv
= BEGV_BYTE
, zv
= ZV_BYTE
;
2141 begv
= BEGV
, zv
= ZV
;
2151 /* Do this first, so it can use CHAR_TO_BYTE
2152 to calculate the old correspondences. */
2153 set_intervals_multibyte (0);
2155 current_buffer
->enable_multibyte_characters
= Qnil
;
2161 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
2164 for (tail
= BUF_MARKERS (current_buffer
); tail
; tail
= tail
->next
)
2165 tail
->charpos
= tail
->bytepos
;
2167 /* Convert multibyte form of 8-bit characters to unibyte. */
2182 if (ASCII_BYTE_P (*p
))
2184 else if (CHAR_BYTE8_HEAD_P (*p
))
2186 c
= STRING_CHAR_AND_LENGTH (p
, stop
- pos
, bytes
);
2187 /* Delete all bytes for this 8-bit character but the
2188 last one, and change the last one to the charcter
2191 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
2203 bytes
= BYTES_BY_CHAR_HEAD (*p
);
2204 p
+= bytes
, pos
+= bytes
;
2208 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2214 unsigned char *p
, *pend
;
2216 /* Be sure not to have a multibyte sequence striding over the GAP.
2217 Ex: We change this: "...abc\302 _GAP_ \241def..."
2218 to: "...abc _GAP_ \302\241def..." */
2221 && GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
2222 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
2224 unsigned char *p
= GPT_ADDR
- 1;
2226 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
2227 if (BASE_LEADING_CODE_P (*p
))
2229 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
2231 move_gap_both (new_gpt
, new_gpt
);
2235 /* Make the buffer contents valid as multibyte by converting
2236 8-bit characters to multibyte form. */
2254 if (ASCII_BYTE_P (*p
))
2256 else if (EQ (flag
, Qt
) && (bytes
= MULTIBYTE_LENGTH (p
, pend
)) > 0)
2257 p
+= bytes
, pos
+= bytes
;
2260 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2263 c
= BYTE8_TO_CHAR (*p
);
2264 bytes
= CHAR_STRING (c
, tmp
);
2266 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2268 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2269 /* Now the gap is after the just inserted data. */
2287 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2289 /* Do this first, so that chars_in_text asks the right question.
2290 set_intervals_multibyte needs it too. */
2291 current_buffer
->enable_multibyte_characters
= Qt
;
2293 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2294 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2296 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2298 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2299 if (BEGV_BYTE
> GPT_BYTE
)
2300 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2302 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2304 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2305 if (ZV_BYTE
> GPT_BYTE
)
2306 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2308 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2311 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2314 if (pt_byte
> GPT_BYTE
)
2315 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2317 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2318 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2321 tail
= markers
= BUF_MARKERS (current_buffer
);
2323 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2324 getting confused by the markers that have not yet been updated.
2325 It is also a signal that it should never create a marker. */
2326 BUF_MARKERS (current_buffer
) = NULL
;
2328 for (; tail
; tail
= tail
->next
)
2330 tail
->bytepos
= advance_to_char_boundary (tail
->bytepos
);
2331 tail
->charpos
= BYTE_TO_CHAR (tail
->bytepos
);
2334 /* Make sure no markers were put on the chain
2335 while the chain value was incorrect. */
2336 if (BUF_MARKERS (current_buffer
))
2339 BUF_MARKERS (current_buffer
) = markers
;
2341 /* Do this last, so it can calculate the new correspondences
2342 between chars and bytes. */
2343 set_intervals_multibyte (1);
2347 current_buffer
->undo_list
= Qnil
;
2349 /* Changing the multibyteness of a buffer means that all windows
2350 showing that buffer must be updated thoroughly. */
2351 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2352 ++windows_or_buffers_changed
;
2354 /* Copy this buffer's new multibyte status
2355 into all of its indirect buffers. */
2356 for (other
= all_buffers
; other
; other
= other
->next
)
2357 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2359 other
->enable_multibyte_characters
2360 = current_buffer
->enable_multibyte_characters
;
2361 other
->prevent_redisplay_optimizations_p
= 1;
2364 /* Restore the modifiedness of the buffer. */
2365 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2366 Fset_buffer_modified_p (Qnil
);
2369 /* Update coding systems of this buffer's process (if any). */
2371 Lisp_Object process
;
2373 process
= Fget_buffer_process (Fcurrent_buffer ());
2374 if (PROCESSP (process
))
2375 setup_process_coding_systems (process
);
2377 #endif /* subprocesses */
2382 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2384 doc
: /* Switch to Fundamental mode by killing current buffer's local variables.
2385 Most local variable bindings are eliminated so that the default values
2386 become effective once more. Also, the syntax table is set from
2387 `standard-syntax-table', the local keymap is set to nil,
2388 and the abbrev table from `fundamental-mode-abbrev-table'.
2389 This function also forces redisplay of the mode line.
2391 Every function to select a new major mode starts by
2392 calling this function.
2394 As a special exception, local variables whose names have
2395 a non-nil `permanent-local' property are not eliminated by this function.
2397 The first thing this function does is run
2398 the normal hook `change-major-mode-hook'. */)
2401 register Lisp_Object alist
, sym
, tem
;
2404 if (!NILP (Vrun_hooks
))
2405 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2406 oalist
= current_buffer
->local_var_alist
;
2408 /* Make sure none of the bindings in oalist
2409 remain swapped in, in their symbols. */
2411 swap_out_buffer_local_variables (current_buffer
);
2413 /* Actually eliminate all local bindings of this buffer. */
2415 reset_buffer_local_variables (current_buffer
, 0);
2417 /* Any which are supposed to be permanent,
2418 make local again, with the same values they had. */
2420 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2422 sym
= XCAR (XCAR (alist
));
2423 tem
= Fget (sym
, Qpermanent_local
);
2426 Fmake_local_variable (sym
);
2427 Fset (sym
, XCDR (XCAR (alist
)));
2431 /* Force mode-line redisplay. Useful here because all major mode
2432 commands call this function. */
2433 update_mode_lines
++;
2438 /* Make sure no local variables remain set up with buffer B
2439 for their current values. */
2442 swap_out_buffer_local_variables (b
)
2445 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2447 XSETBUFFER (buffer
, b
);
2448 oalist
= b
->local_var_alist
;
2450 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2452 sym
= XCAR (XCAR (alist
));
2454 /* Need not do anything if some other buffer's binding is now encached. */
2455 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
;
2456 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2458 /* Symbol is set up for this buffer's old local value.
2459 Set it up for the current buffer with the default value. */
2461 tem
= XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->cdr
;
2462 /* Store the symbol's current value into the alist entry
2463 it is currently set up for. This is so that, if the
2464 local is marked permanent, and we make it local again
2465 later in Fkill_all_local_variables, we don't lose the value. */
2466 XSETCDR (XCAR (tem
),
2467 do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
));
2468 /* Switch to the symbol's default-value alist entry. */
2470 /* Mark it as current for buffer B. */
2471 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->buffer
= buffer
;
2472 /* Store the current value into any forwarding in the symbol. */
2473 store_symval_forwarding (sym
,
2474 XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym
))->realvalue
,
2480 /* Find all the overlays in the current buffer that contain position POS.
2481 Return the number found, and store them in a vector in *VEC_PTR.
2482 Store in *LEN_PTR the size allocated for the vector.
2483 Store in *NEXT_PTR the next position after POS where an overlay starts,
2484 or ZV if there are no more overlays between POS and ZV.
2485 Store in *PREV_PTR the previous position before POS where an overlay ends,
2486 or where an overlay starts which ends at or after POS;
2487 or BEGV if there are no such overlays from BEGV to POS.
2488 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2490 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2491 when this function is called.
2493 If EXTEND is non-zero, we make the vector bigger if necessary.
2494 If EXTEND is zero, we never extend the vector,
2495 and we store only as many overlays as will fit.
2496 But we still return the total number of overlays.
2498 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2499 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2500 default (BEGV or ZV). */
2503 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2506 Lisp_Object
**vec_ptr
;
2512 Lisp_Object overlay
, start
, end
;
2513 struct Lisp_Overlay
*tail
;
2516 Lisp_Object
*vec
= *vec_ptr
;
2519 int inhibit_storing
= 0;
2521 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2523 int startpos
, endpos
;
2525 XSETMISC (overlay
, tail
);
2527 start
= OVERLAY_START (overlay
);
2528 end
= OVERLAY_END (overlay
);
2529 endpos
= OVERLAY_POSITION (end
);
2536 startpos
= OVERLAY_POSITION (start
);
2537 /* This one ends at or after POS
2538 so its start counts for PREV_PTR if it's before POS. */
2539 if (prev
< startpos
&& startpos
< pos
)
2543 if (startpos
<= pos
)
2547 /* The supplied vector is full.
2548 Either make it bigger, or don't store any more in it. */
2551 /* Make it work with an initial len == 0. */
2556 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2560 inhibit_storing
= 1;
2563 if (!inhibit_storing
)
2565 /* Keep counting overlays even if we can't return them all. */
2568 else if (startpos
< next
)
2572 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2574 int startpos
, endpos
;
2576 XSETMISC (overlay
, tail
);
2578 start
= OVERLAY_START (overlay
);
2579 end
= OVERLAY_END (overlay
);
2580 startpos
= OVERLAY_POSITION (start
);
2583 if (startpos
< next
)
2587 endpos
= OVERLAY_POSITION (end
);
2594 /* Make it work with an initial len == 0. */
2599 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2603 inhibit_storing
= 1;
2606 if (!inhibit_storing
)
2610 if (startpos
< pos
&& startpos
> prev
)
2613 else if (endpos
< pos
&& endpos
> prev
)
2615 else if (endpos
== pos
&& startpos
> prev
2616 && (!change_req
|| startpos
< pos
))
2627 /* Find all the overlays in the current buffer that overlap the range BEG-END
2628 or are empty at BEG.
2630 Return the number found, and store them in a vector in *VEC_PTR.
2631 Store in *LEN_PTR the size allocated for the vector.
2632 Store in *NEXT_PTR the next position after POS where an overlay starts,
2633 or ZV if there are no more overlays.
2634 Store in *PREV_PTR the previous position before POS where an overlay ends,
2635 or BEGV if there are no previous overlays.
2636 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2638 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2639 when this function is called.
2641 If EXTEND is non-zero, we make the vector bigger if necessary.
2642 If EXTEND is zero, we never extend the vector,
2643 and we store only as many overlays as will fit.
2644 But we still return the total number of overlays. */
2647 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2650 Lisp_Object
**vec_ptr
;
2655 Lisp_Object overlay
, ostart
, oend
;
2656 struct Lisp_Overlay
*tail
;
2659 Lisp_Object
*vec
= *vec_ptr
;
2662 int inhibit_storing
= 0;
2664 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2666 int startpos
, endpos
;
2668 XSETMISC (overlay
, tail
);
2670 ostart
= OVERLAY_START (overlay
);
2671 oend
= OVERLAY_END (overlay
);
2672 endpos
= OVERLAY_POSITION (oend
);
2679 startpos
= OVERLAY_POSITION (ostart
);
2680 /* Count an interval if it either overlaps the range
2681 or is empty at the start of the range. */
2682 if ((beg
< endpos
&& startpos
< end
)
2683 || (startpos
== endpos
&& beg
== endpos
))
2687 /* The supplied vector is full.
2688 Either make it bigger, or don't store any more in it. */
2691 /* Make it work with an initial len == 0. */
2696 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2700 inhibit_storing
= 1;
2703 if (!inhibit_storing
)
2705 /* Keep counting overlays even if we can't return them all. */
2708 else if (startpos
< next
)
2712 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2714 int startpos
, endpos
;
2716 XSETMISC (overlay
, tail
);
2718 ostart
= OVERLAY_START (overlay
);
2719 oend
= OVERLAY_END (overlay
);
2720 startpos
= OVERLAY_POSITION (ostart
);
2723 if (startpos
< next
)
2727 endpos
= OVERLAY_POSITION (oend
);
2728 /* Count an interval if it either overlaps the range
2729 or is empty at the start of the range. */
2730 if ((beg
< endpos
&& startpos
< end
)
2731 || (startpos
== endpos
&& beg
== endpos
))
2737 /* Make it work with an initial len == 0. */
2742 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2746 inhibit_storing
= 1;
2749 if (!inhibit_storing
)
2753 else if (endpos
< beg
&& endpos
> prev
)
2765 /* Return non-zero if there exists an overlay with a non-nil
2766 `mouse-face' property overlapping OVERLAY. */
2769 mouse_face_overlay_overlaps (overlay
)
2770 Lisp_Object overlay
;
2772 int start
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2773 int end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2775 Lisp_Object
*v
, tem
;
2778 v
= (Lisp_Object
*) alloca (size
* sizeof *v
);
2779 n
= overlays_in (start
, end
, 0, &v
, &size
, NULL
, NULL
);
2782 v
= (Lisp_Object
*) alloca (n
* sizeof *v
);
2783 overlays_in (start
, end
, 0, &v
, &n
, NULL
, NULL
);
2786 for (i
= 0; i
< n
; ++i
)
2787 if (!EQ (v
[i
], overlay
)
2788 && (tem
= Foverlay_get (overlay
, Qmouse_face
),
2797 /* Fast function to just test if we're at an overlay boundary. */
2799 overlay_touches_p (pos
)
2802 Lisp_Object overlay
;
2803 struct Lisp_Overlay
*tail
;
2805 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
2809 XSETMISC (overlay
,tail
);
2810 if (!GC_OVERLAYP (overlay
))
2813 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2816 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2820 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
2824 XSETMISC (overlay
, tail
);
2825 if (!GC_OVERLAYP (overlay
))
2828 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2831 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2839 Lisp_Object overlay
;
2845 compare_overlays (v1
, v2
)
2846 const void *v1
, *v2
;
2848 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2849 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2850 if (s1
->priority
!= s2
->priority
)
2851 return s1
->priority
- s2
->priority
;
2852 if (s1
->beg
!= s2
->beg
)
2853 return s1
->beg
- s2
->beg
;
2854 if (s1
->end
!= s2
->end
)
2855 return s2
->end
- s1
->end
;
2859 /* Sort an array of overlays by priority. The array is modified in place.
2860 The return value is the new size; this may be smaller than the original
2861 size if some of the overlays were invalid or were window-specific. */
2863 sort_overlays (overlay_vec
, noverlays
, w
)
2864 Lisp_Object
*overlay_vec
;
2869 struct sortvec
*sortvec
;
2870 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2872 /* Put the valid and relevant overlays into sortvec. */
2874 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2877 Lisp_Object overlay
;
2879 overlay
= overlay_vec
[i
];
2880 if (OVERLAY_VALID (overlay
)
2881 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2882 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2884 /* If we're interested in a specific window, then ignore
2885 overlays that are limited to some other window. */
2890 window
= Foverlay_get (overlay
, Qwindow
);
2891 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2895 /* This overlay is good and counts: put it into sortvec. */
2896 sortvec
[j
].overlay
= overlay
;
2897 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2898 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2899 tem
= Foverlay_get (overlay
, Qpriority
);
2901 sortvec
[j
].priority
= XINT (tem
);
2903 sortvec
[j
].priority
= 0;
2909 /* Sort the overlays into the proper order: increasing priority. */
2912 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2914 for (i
= 0; i
< noverlays
; i
++)
2915 overlay_vec
[i
] = sortvec
[i
].overlay
;
2921 Lisp_Object string
, string2
;
2928 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2929 int size
; /* Allocated length of that array. */
2930 int used
; /* How much of the array is currently in use. */
2931 int bytes
; /* Total length of the strings in buf. */
2934 /* Buffers for storing information about the overlays touching a given
2935 position. These could be automatic variables in overlay_strings, but
2936 it's more efficient to hold onto the memory instead of repeatedly
2937 allocating and freeing it. */
2938 static struct sortstrlist overlay_heads
, overlay_tails
;
2939 static unsigned char *overlay_str_buf
;
2941 /* Allocated length of overlay_str_buf. */
2942 static int overlay_str_len
;
2944 /* A comparison function suitable for passing to qsort. */
2946 cmp_for_strings (as1
, as2
)
2949 struct sortstr
*s1
= (struct sortstr
*)as1
;
2950 struct sortstr
*s2
= (struct sortstr
*)as2
;
2951 if (s1
->size
!= s2
->size
)
2952 return s2
->size
- s1
->size
;
2953 if (s1
->priority
!= s2
->priority
)
2954 return s1
->priority
- s2
->priority
;
2959 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2960 struct sortstrlist
*ssl
;
2961 Lisp_Object str
, str2
, pri
;
2966 if (ssl
->used
== ssl
->size
)
2972 ssl
->buf
= ((struct sortstr
*)
2973 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2975 ssl
->buf
[ssl
->used
].string
= str
;
2976 ssl
->buf
[ssl
->used
].string2
= str2
;
2977 ssl
->buf
[ssl
->used
].size
= size
;
2978 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2981 if (NILP (current_buffer
->enable_multibyte_characters
))
2982 nbytes
= SCHARS (str
);
2983 else if (! STRING_MULTIBYTE (str
))
2984 nbytes
= count_size_as_multibyte (SDATA (str
),
2987 nbytes
= SBYTES (str
);
2989 ssl
->bytes
+= nbytes
;
2993 if (NILP (current_buffer
->enable_multibyte_characters
))
2994 nbytes
= SCHARS (str2
);
2995 else if (! STRING_MULTIBYTE (str2
))
2996 nbytes
= count_size_as_multibyte (SDATA (str2
),
2999 nbytes
= SBYTES (str2
);
3001 ssl
->bytes
+= nbytes
;
3005 /* Return the concatenation of the strings associated with overlays that
3006 begin or end at POS, ignoring overlays that are specific to a window
3007 other than W. The strings are concatenated in the appropriate order:
3008 shorter overlays nest inside longer ones, and higher priority inside
3009 lower. Normally all of the after-strings come first, but zero-sized
3010 overlays have their after-strings ride along with the before-strings
3011 because it would look strange to print them inside-out.
3013 Returns the string length, and stores the contents indirectly through
3014 PSTR, if that variable is non-null. The string may be overwritten by
3015 subsequent calls. */
3018 overlay_strings (pos
, w
, pstr
)
3021 unsigned char **pstr
;
3023 Lisp_Object overlay
, window
, str
;
3024 struct Lisp_Overlay
*ov
;
3025 int startpos
, endpos
;
3026 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
3028 overlay_heads
.used
= overlay_heads
.bytes
= 0;
3029 overlay_tails
.used
= overlay_tails
.bytes
= 0;
3030 for (ov
= current_buffer
->overlays_before
; 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 for (ov
= current_buffer
->overlays_after
; ov
; ov
= ov
->next
)
3060 XSETMISC (overlay
, ov
);
3061 eassert (OVERLAYP (overlay
));
3063 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3064 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3067 if (endpos
!= pos
&& startpos
!= pos
)
3069 window
= Foverlay_get (overlay
, Qwindow
);
3070 if (WINDOWP (window
) && XWINDOW (window
) != w
)
3073 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
3074 record_overlay_string (&overlay_heads
, str
,
3076 ? Foverlay_get (overlay
, Qafter_string
)
3078 Foverlay_get (overlay
, Qpriority
),
3080 else if (endpos
== pos
3081 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
3082 record_overlay_string (&overlay_tails
, str
, Qnil
,
3083 Foverlay_get (overlay
, Qpriority
),
3086 if (overlay_tails
.used
> 1)
3087 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
3089 if (overlay_heads
.used
> 1)
3090 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
3092 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
3097 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
3099 if (total
> overlay_str_len
)
3101 overlay_str_len
= total
;
3102 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
3105 p
= overlay_str_buf
;
3106 for (i
= overlay_tails
.used
; --i
>= 0;)
3109 tem
= overlay_tails
.buf
[i
].string
;
3110 nbytes
= copy_text (SDATA (tem
), p
,
3112 STRING_MULTIBYTE (tem
), multibyte
);
3115 for (i
= 0; i
< overlay_heads
.used
; ++i
)
3118 tem
= overlay_heads
.buf
[i
].string
;
3119 nbytes
= copy_text (SDATA (tem
), p
,
3121 STRING_MULTIBYTE (tem
), multibyte
);
3123 tem
= overlay_heads
.buf
[i
].string2
;
3126 nbytes
= copy_text (SDATA (tem
), p
,
3128 STRING_MULTIBYTE (tem
), multibyte
);
3132 if (p
!= overlay_str_buf
+ total
)
3135 *pstr
= overlay_str_buf
;
3141 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
3144 recenter_overlay_lists (buf
, pos
)
3148 Lisp_Object overlay
, beg
, end
;
3149 struct Lisp_Overlay
*prev
, *tail
, *next
;
3151 /* See if anything in overlays_before should move to overlays_after. */
3153 /* We don't strictly need prev in this loop; it should always be nil.
3154 But we use it for symmetry and in case that should cease to be true
3155 with some future change. */
3157 for (tail
= buf
->overlays_before
; tail
; prev
= tail
, tail
= next
)
3160 XSETMISC (overlay
, tail
);
3162 /* If the overlay is not valid, get rid of it. */
3163 if (!OVERLAY_VALID (overlay
))
3168 /* Splice the cons cell TAIL out of overlays_before. */
3172 buf
->overlays_before
= next
;
3178 beg
= OVERLAY_START (overlay
);
3179 end
= OVERLAY_END (overlay
);
3181 if (OVERLAY_POSITION (end
) > pos
)
3183 /* OVERLAY needs to be moved. */
3184 int where
= OVERLAY_POSITION (beg
);
3185 struct Lisp_Overlay
*other
, *other_prev
;
3187 /* Splice the cons cell TAIL out of overlays_before. */
3191 buf
->overlays_before
= next
;
3193 /* Search thru overlays_after for where to put it. */
3195 for (other
= buf
->overlays_after
; other
;
3196 other_prev
= other
, other
= other
->next
)
3198 Lisp_Object otherbeg
, otheroverlay
;
3200 XSETMISC (otheroverlay
, other
);
3201 eassert (OVERLAY_VALID (otheroverlay
));
3203 otherbeg
= OVERLAY_START (otheroverlay
);
3204 if (OVERLAY_POSITION (otherbeg
) >= where
)
3208 /* Add TAIL to overlays_after before OTHER. */
3211 other_prev
->next
= tail
;
3213 buf
->overlays_after
= tail
;
3217 /* We've reached the things that should stay in overlays_before.
3218 All the rest of overlays_before must end even earlier,
3223 /* See if anything in overlays_after should be in overlays_before. */
3225 for (tail
= buf
->overlays_after
; tail
; prev
= tail
, tail
= next
)
3228 XSETMISC (overlay
, tail
);
3230 /* If the overlay is not valid, get rid of it. */
3231 if (!OVERLAY_VALID (overlay
))
3236 /* Splice the cons cell TAIL out of overlays_after. */
3240 buf
->overlays_after
= next
;
3246 beg
= OVERLAY_START (overlay
);
3247 end
= OVERLAY_END (overlay
);
3249 /* Stop looking, when we know that nothing further
3250 can possibly end before POS. */
3251 if (OVERLAY_POSITION (beg
) > pos
)
3254 if (OVERLAY_POSITION (end
) <= pos
)
3256 /* OVERLAY needs to be moved. */
3257 int where
= OVERLAY_POSITION (end
);
3258 struct Lisp_Overlay
*other
, *other_prev
;
3260 /* Splice the cons cell TAIL out of overlays_after. */
3264 buf
->overlays_after
= next
;
3266 /* Search thru overlays_before for where to put it. */
3268 for (other
= buf
->overlays_before
; other
;
3269 other_prev
= other
, other
= other
->next
)
3271 Lisp_Object otherend
, otheroverlay
;
3273 XSETMISC (otheroverlay
, other
);
3274 eassert (OVERLAY_VALID (otheroverlay
));
3276 otherend
= OVERLAY_END (otheroverlay
);
3277 if (OVERLAY_POSITION (otherend
) <= where
)
3281 /* Add TAIL to overlays_before before OTHER. */
3284 other_prev
->next
= tail
;
3286 buf
->overlays_before
= tail
;
3291 buf
->overlay_center
= pos
;
3295 adjust_overlays_for_insert (pos
, length
)
3299 /* After an insertion, the lists are still sorted properly,
3300 but we may need to update the value of the overlay center. */
3301 if (current_buffer
->overlay_center
>= pos
)
3302 current_buffer
->overlay_center
+= length
;
3306 adjust_overlays_for_delete (pos
, length
)
3310 if (current_buffer
->overlay_center
< pos
)
3311 /* The deletion was to our right. No change needed; the before- and
3312 after-lists are still consistent. */
3314 else if (current_buffer
->overlay_center
> pos
+ length
)
3315 /* The deletion was to our left. We need to adjust the center value
3316 to account for the change in position, but the lists are consistent
3317 given the new value. */
3318 current_buffer
->overlay_center
-= length
;
3320 /* We're right in the middle. There might be things on the after-list
3321 that now belong on the before-list. Recentering will move them,
3322 and also update the center point. */
3323 recenter_overlay_lists (current_buffer
, pos
);
3326 /* Fix up overlays that were garbled as a result of permuting markers
3327 in the range START through END. Any overlay with at least one
3328 endpoint in this range will need to be unlinked from the overlay
3329 list and reinserted in its proper place.
3330 Such an overlay might even have negative size at this point.
3331 If so, we'll make the overlay empty. */
3333 fix_start_end_in_overlays (start
, end
)
3334 register int start
, end
;
3336 Lisp_Object overlay
;
3337 struct Lisp_Overlay
*before_list
, *after_list
;
3338 /* These are either nil, indicating that before_list or after_list
3339 should be assigned, or the cons cell the cdr of which should be
3341 struct Lisp_Overlay
*beforep
= NULL
, *afterp
= NULL
;
3342 /* 'Parent', likewise, indicates a cons cell or
3343 current_buffer->overlays_before or overlays_after, depending
3344 which loop we're in. */
3345 struct Lisp_Overlay
*tail
, *parent
;
3346 int startpos
, endpos
;
3348 /* This algorithm shifts links around instead of consing and GCing.
3349 The loop invariant is that before_list (resp. after_list) is a
3350 well-formed list except that its last element, the CDR of beforep
3351 (resp. afterp) if beforep (afterp) isn't nil or before_list
3352 (after_list) if it is, is still uninitialized. So it's not a bug
3353 that before_list isn't initialized, although it may look
3355 for (parent
= NULL
, tail
= current_buffer
->overlays_before
; tail
;)
3357 XSETMISC (overlay
, tail
);
3359 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3360 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3362 /* If the overlay is backwards, make it empty. */
3363 if (endpos
< startpos
)
3366 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3374 || (startpos
>= start
&& startpos
< end
))
3376 /* Add it to the end of the wrong list. Later on,
3377 recenter_overlay_lists will move it to the right place. */
3378 if (endpos
< current_buffer
->overlay_center
)
3383 afterp
->next
= tail
;
3391 beforep
->next
= tail
;
3395 current_buffer
->overlays_before
= tail
->next
;
3397 parent
->next
= tail
->next
;
3401 parent
= tail
, tail
= parent
->next
;
3403 for (parent
= NULL
, tail
= current_buffer
->overlays_after
; tail
;)
3405 XSETMISC (overlay
, tail
);
3407 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3408 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3410 /* If the overlay is backwards, make it empty. */
3411 if (endpos
< startpos
)
3414 Fset_marker (OVERLAY_START (overlay
), make_number (startpos
),
3418 if (startpos
>= end
)
3421 if (startpos
>= start
3422 || (endpos
>= start
&& endpos
< end
))
3424 if (endpos
< current_buffer
->overlay_center
)
3429 afterp
->next
= tail
;
3437 beforep
->next
= tail
;
3441 current_buffer
->overlays_after
= tail
->next
;
3443 parent
->next
= tail
->next
;
3447 parent
= tail
, tail
= parent
->next
;
3450 /* Splice the constructed (wrong) lists into the buffer's lists,
3451 and let the recenter function make it sane again. */
3454 beforep
->next
= current_buffer
->overlays_before
;
3455 current_buffer
->overlays_before
= before_list
;
3457 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3461 afterp
->next
= current_buffer
->overlays_after
;
3462 current_buffer
->overlays_after
= after_list
;
3464 recenter_overlay_lists (current_buffer
, current_buffer
->overlay_center
);
3467 /* We have two types of overlay: the one whose ending marker is
3468 after-insertion-marker (this is the usual case) and the one whose
3469 ending marker is before-insertion-marker. When `overlays_before'
3470 contains overlays of the latter type and the former type in this
3471 order and both overlays end at inserting position, inserting a text
3472 increases only the ending marker of the latter type, which results
3473 in incorrect ordering of `overlays_before'.
3475 This function fixes ordering of overlays in the slot
3476 `overlays_before' of the buffer *BP. Before the insertion, `point'
3477 was at PREV, and now is at POS. */
3480 fix_overlays_before (bp
, prev
, pos
)
3482 EMACS_INT prev
, pos
;
3484 /* If parent is nil, replace overlays_before; otherwise, parent->next. */
3485 struct Lisp_Overlay
*tail
= bp
->overlays_before
, *parent
= NULL
, *right_pair
;
3489 /* After the insertion, the several overlays may be in incorrect
3490 order. The possibility is that, in the list `overlays_before',
3491 an overlay which ends at POS appears after an overlay which ends
3492 at PREV. Since POS is greater than PREV, we must fix the
3493 ordering of these overlays, by moving overlays ends at POS before
3494 the overlays ends at PREV. */
3496 /* At first, find a place where disordered overlays should be linked
3497 in. It is where an overlay which end before POS exists. (i.e. an
3498 overlay whose ending marker is after-insertion-marker if disorder
3501 && (XSETMISC (tem
, tail
),
3502 (end
= OVERLAY_POSITION (OVERLAY_END (tem
))) >= pos
))
3508 /* If we don't find such an overlay,
3509 or the found one ends before PREV,
3510 or the found one is the last one in the list,
3511 we don't have to fix anything. */
3512 if (!tail
|| end
< prev
|| !tail
->next
)
3515 right_pair
= parent
;
3519 /* Now, end position of overlays in the list TAIL should be before
3520 or equal to PREV. In the loop, an overlay which ends at POS is
3521 moved ahead to the place indicated by the CDR of RIGHT_PAIR. If
3522 we found an overlay which ends before PREV, the remaining
3523 overlays are in correct order. */
3526 XSETMISC (tem
, tail
);
3527 end
= OVERLAY_POSITION (OVERLAY_END (tem
));
3530 { /* This overlay is disordered. */
3531 struct Lisp_Overlay
*found
= tail
;
3533 /* Unlink the found overlay. */
3535 parent
->next
= tail
;
3536 /* Move an overlay at RIGHT_PLACE to the next of the found one,
3537 and link it into the right place. */
3540 found
->next
= bp
->overlays_before
;
3541 bp
->overlays_before
= found
;
3545 found
->next
= right_pair
->next
;
3546 right_pair
->next
= found
;
3549 else if (end
== prev
)
3554 else /* No more disordered overlay. */
3559 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3560 doc
: /* Return t if OBJECT is an overlay. */)
3564 return (OVERLAYP (object
) ? Qt
: Qnil
);
3567 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3568 doc
: /* Create a new overlay with range BEG to END in BUFFER.
3569 If omitted, BUFFER defaults to the current buffer.
3570 BEG and END may be integers or markers.
3571 The fourth arg FRONT-ADVANCE, if non-nil, makes the marker
3572 for the front of the overlay advance when text is inserted there
3573 \(which means the text *is not* included in the overlay).
3574 The fifth arg REAR-ADVANCE, if non-nil, makes the marker
3575 for the rear of the overlay advance when text is inserted there
3576 \(which means the text *is* included in the overlay). */)
3577 (beg
, end
, buffer
, front_advance
, rear_advance
)
3578 Lisp_Object beg
, end
, buffer
;
3579 Lisp_Object front_advance
, rear_advance
;
3581 Lisp_Object overlay
;
3585 XSETBUFFER (buffer
, current_buffer
);
3587 CHECK_BUFFER (buffer
);
3589 && ! EQ (Fmarker_buffer (beg
), buffer
))
3590 error ("Marker points into wrong buffer");
3592 && ! EQ (Fmarker_buffer (end
), buffer
))
3593 error ("Marker points into wrong buffer");
3595 CHECK_NUMBER_COERCE_MARKER (beg
);
3596 CHECK_NUMBER_COERCE_MARKER (end
);
3598 if (XINT (beg
) > XINT (end
))
3601 temp
= beg
; beg
= end
; end
= temp
;
3604 b
= XBUFFER (buffer
);
3606 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3607 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3609 if (!NILP (front_advance
))
3610 XMARKER (beg
)->insertion_type
= 1;
3611 if (!NILP (rear_advance
))
3612 XMARKER (end
)->insertion_type
= 1;
3614 overlay
= allocate_misc ();
3615 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3616 XOVERLAY (overlay
)->start
= beg
;
3617 XOVERLAY (overlay
)->end
= end
;
3618 XOVERLAY (overlay
)->plist
= Qnil
;
3619 XOVERLAY (overlay
)->next
= NULL
;
3621 /* Put the new overlay on the wrong list. */
3622 end
= OVERLAY_END (overlay
);
3623 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3625 if (b
->overlays_after
)
3626 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3627 b
->overlays_after
= XOVERLAY (overlay
);
3631 if (b
->overlays_before
)
3632 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3633 b
->overlays_before
= XOVERLAY (overlay
);
3636 /* This puts it in the right list, and in the right order. */
3637 recenter_overlay_lists (b
, b
->overlay_center
);
3639 /* We don't need to redisplay the region covered by the overlay, because
3640 the overlay has no properties at the moment. */
3645 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3648 modify_overlay (buf
, start
, end
)
3650 EMACS_INT start
, end
;
3659 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3661 /* If this is a buffer not in the selected window,
3662 we must do other windows. */
3663 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3664 windows_or_buffers_changed
= 1;
3665 /* If multiple windows show this buffer, we must do other windows. */
3666 else if (buffer_shared
> 1)
3667 windows_or_buffers_changed
= 1;
3668 /* If we modify an overlay at the end of the buffer, we cannot
3669 be sure that window end is still valid. */
3670 else if (end
>= ZV
&& start
<= ZV
)
3671 windows_or_buffers_changed
= 1;
3673 ++BUF_OVERLAY_MODIFF (buf
);
3677 Lisp_Object
Fdelete_overlay ();
3679 static struct Lisp_Overlay
*
3680 unchain_overlay (list
, overlay
)
3681 struct Lisp_Overlay
*list
, *overlay
;
3683 struct Lisp_Overlay
*tmp
, *prev
;
3684 for (tmp
= list
, prev
= NULL
; tmp
; prev
= tmp
, tmp
= tmp
->next
)
3688 prev
->next
= tmp
->next
;
3691 overlay
->next
= NULL
;
3697 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3698 doc
: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
3699 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
3700 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current
3702 (overlay
, beg
, end
, buffer
)
3703 Lisp_Object overlay
, beg
, end
, buffer
;
3705 struct buffer
*b
, *ob
;
3706 Lisp_Object obuffer
;
3707 int count
= SPECPDL_INDEX ();
3709 CHECK_OVERLAY (overlay
);
3711 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3713 XSETBUFFER (buffer
, current_buffer
);
3714 CHECK_BUFFER (buffer
);
3717 && ! EQ (Fmarker_buffer (beg
), buffer
))
3718 error ("Marker points into wrong buffer");
3720 && ! EQ (Fmarker_buffer (end
), buffer
))
3721 error ("Marker points into wrong buffer");
3723 CHECK_NUMBER_COERCE_MARKER (beg
);
3724 CHECK_NUMBER_COERCE_MARKER (end
);
3726 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3727 return Fdelete_overlay (overlay
);
3729 if (XINT (beg
) > XINT (end
))
3732 temp
= beg
; beg
= end
; end
= temp
;
3735 specbind (Qinhibit_quit
, Qt
);
3737 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3738 b
= XBUFFER (buffer
);
3739 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3741 /* If the overlay has changed buffers, do a thorough redisplay. */
3742 if (!EQ (buffer
, obuffer
))
3744 /* Redisplay where the overlay was. */
3745 if (!NILP (obuffer
))
3750 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3751 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3753 modify_overlay (ob
, o_beg
, o_end
);
3756 /* Redisplay where the overlay is going to be. */
3757 modify_overlay (b
, XINT (beg
), XINT (end
));
3760 /* Redisplay the area the overlay has just left, or just enclosed. */
3764 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3765 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3767 if (o_beg
== XINT (beg
))
3768 modify_overlay (b
, o_end
, XINT (end
));
3769 else if (o_end
== XINT (end
))
3770 modify_overlay (b
, o_beg
, XINT (beg
));
3773 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3774 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3775 modify_overlay (b
, o_beg
, o_end
);
3779 if (!NILP (obuffer
))
3782 = unchain_overlay (ob
->overlays_before
, XOVERLAY (overlay
));
3784 = unchain_overlay (ob
->overlays_after
, XOVERLAY (overlay
));
3785 eassert (XOVERLAY (overlay
)->next
== NULL
);
3788 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3789 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3791 /* Put the overlay on the wrong list. */
3792 end
= OVERLAY_END (overlay
);
3793 if (OVERLAY_POSITION (end
) < b
->overlay_center
)
3795 XOVERLAY (overlay
)->next
= b
->overlays_after
;
3796 b
->overlays_after
= XOVERLAY (overlay
);
3800 XOVERLAY (overlay
)->next
= b
->overlays_before
;
3801 b
->overlays_before
= XOVERLAY (overlay
);
3804 /* This puts it in the right list, and in the right order. */
3805 recenter_overlay_lists (b
, b
->overlay_center
);
3807 return unbind_to (count
, overlay
);
3810 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3811 doc
: /* Delete the overlay OVERLAY from its buffer. */)
3813 Lisp_Object overlay
;
3817 int count
= SPECPDL_INDEX ();
3819 CHECK_OVERLAY (overlay
);
3821 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3825 b
= XBUFFER (buffer
);
3826 specbind (Qinhibit_quit
, Qt
);
3828 b
->overlays_before
= unchain_overlay (b
->overlays_before
,XOVERLAY (overlay
));
3829 b
->overlays_after
= unchain_overlay (b
->overlays_after
, XOVERLAY (overlay
));
3830 eassert (XOVERLAY (overlay
)->next
== NULL
);
3832 marker_position (OVERLAY_START (overlay
)),
3833 marker_position (OVERLAY_END (overlay
)));
3834 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3835 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3837 /* When deleting an overlay with before or after strings, turn off
3838 display optimizations for the affected buffer, on the basis that
3839 these strings may contain newlines. This is easier to do than to
3840 check for that situation during redisplay. */
3841 if (!windows_or_buffers_changed
3842 && (!NILP (Foverlay_get (overlay
, Qbefore_string
))
3843 || !NILP (Foverlay_get (overlay
, Qafter_string
))))
3844 b
->prevent_redisplay_optimizations_p
= 1;
3846 return unbind_to (count
, Qnil
);
3849 /* Overlay dissection functions. */
3851 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3852 doc
: /* Return the position at which OVERLAY starts. */)
3854 Lisp_Object overlay
;
3856 CHECK_OVERLAY (overlay
);
3858 return (Fmarker_position (OVERLAY_START (overlay
)));
3861 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3862 doc
: /* Return the position at which OVERLAY ends. */)
3864 Lisp_Object overlay
;
3866 CHECK_OVERLAY (overlay
);
3868 return (Fmarker_position (OVERLAY_END (overlay
)));
3871 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3872 doc
: /* Return the buffer OVERLAY belongs to.
3873 Return nil if OVERLAY has been deleted. */)
3875 Lisp_Object overlay
;
3877 CHECK_OVERLAY (overlay
);
3879 return Fmarker_buffer (OVERLAY_START (overlay
));
3882 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3883 doc
: /* Return a list of the properties on OVERLAY.
3884 This is a copy of OVERLAY's plist; modifying its conses has no effect on
3887 Lisp_Object overlay
;
3889 CHECK_OVERLAY (overlay
);
3891 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3895 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3896 doc
: /* Return a list of the overlays that contain position POS. */)
3901 Lisp_Object
*overlay_vec
;
3905 CHECK_NUMBER_COERCE_MARKER (pos
);
3908 /* We can't use alloca here because overlays_at can call xrealloc. */
3909 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3911 /* Put all the overlays we want in a vector in overlay_vec.
3912 Store the length in len. */
3913 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3914 (int *) 0, (int *) 0, 0);
3916 /* Make a list of them all. */
3917 result
= Flist (noverlays
, overlay_vec
);
3919 xfree (overlay_vec
);
3923 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3924 doc
: /* Return a list of the overlays that overlap the region BEG ... END.
3925 Overlap means that at least one character is contained within the overlay
3926 and also contained within the specified region.
3927 Empty overlays are included in the result if they are located at BEG
3928 or between BEG and END. */)
3930 Lisp_Object beg
, end
;
3933 Lisp_Object
*overlay_vec
;
3937 CHECK_NUMBER_COERCE_MARKER (beg
);
3938 CHECK_NUMBER_COERCE_MARKER (end
);
3941 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3943 /* Put all the overlays we want in a vector in overlay_vec.
3944 Store the length in len. */
3945 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3946 (int *) 0, (int *) 0);
3948 /* Make a list of them all. */
3949 result
= Flist (noverlays
, overlay_vec
);
3951 xfree (overlay_vec
);
3955 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3957 doc
: /* Return the next position after POS where an overlay starts or ends.
3958 If there are no overlay boundaries from POS to (point-max),
3959 the value is (point-max). */)
3965 Lisp_Object
*overlay_vec
;
3969 CHECK_NUMBER_COERCE_MARKER (pos
);
3972 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3974 /* Put all the overlays we want in a vector in overlay_vec.
3975 Store the length in len.
3976 endpos gets the position where the next overlay starts. */
3977 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3978 &endpos
, (int *) 0, 1);
3980 /* If any of these overlays ends before endpos,
3981 use its ending point instead. */
3982 for (i
= 0; i
< noverlays
; i
++)
3987 oend
= OVERLAY_END (overlay_vec
[i
]);
3988 oendpos
= OVERLAY_POSITION (oend
);
3989 if (oendpos
< endpos
)
3993 xfree (overlay_vec
);
3994 return make_number (endpos
);
3997 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3998 Sprevious_overlay_change
, 1, 1, 0,
3999 doc
: /* Return the previous position before POS where an overlay starts or ends.
4000 If there are no overlay boundaries from (point-min) to POS,
4001 the value is (point-min). */)
4007 Lisp_Object
*overlay_vec
;
4010 CHECK_NUMBER_COERCE_MARKER (pos
);
4012 /* At beginning of buffer, we know the answer;
4013 avoid bug subtracting 1 below. */
4014 if (XINT (pos
) == BEGV
)
4018 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
4020 /* Put all the overlays we want in a vector in overlay_vec.
4021 Store the length in len.
4022 prevpos gets the position of the previous change. */
4023 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
4024 (int *) 0, &prevpos
, 1);
4026 xfree (overlay_vec
);
4027 return make_number (prevpos
);
4030 /* These functions are for debugging overlays. */
4032 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
4033 doc
: /* Return a pair of lists giving all the overlays of the current buffer.
4034 The car has all the overlays before the overlay center;
4035 the cdr has all the overlays after the overlay center.
4036 Recentering overlays moves overlays between these lists.
4037 The lists you get are copies, so that changing them has no effect.
4038 However, the overlays you get are the real objects that the buffer uses. */)
4041 struct Lisp_Overlay
*ol
;
4042 Lisp_Object before
= Qnil
, after
= Qnil
, tmp
;
4043 for (ol
= current_buffer
->overlays_before
; ol
; ol
= ol
->next
)
4046 before
= Fcons (tmp
, before
);
4048 for (ol
= current_buffer
->overlays_after
; ol
; ol
= ol
->next
)
4051 after
= Fcons (tmp
, after
);
4053 return Fcons (Fnreverse (before
), Fnreverse (after
));
4056 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
4057 doc
: /* Recenter the overlays of the current buffer around position POS.
4058 That makes overlay lookup faster for positions near POS (but perhaps slower
4059 for positions far away from POS). */)
4063 CHECK_NUMBER_COERCE_MARKER (pos
);
4065 recenter_overlay_lists (current_buffer
, XINT (pos
));
4069 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
4070 doc
: /* Get the property of overlay OVERLAY with property name PROP. */)
4072 Lisp_Object overlay
, prop
;
4074 CHECK_OVERLAY (overlay
);
4075 return lookup_char_property (XOVERLAY (overlay
)->plist
, prop
, 0);
4078 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
4079 doc
: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */)
4080 (overlay
, prop
, value
)
4081 Lisp_Object overlay
, prop
, value
;
4083 Lisp_Object tail
, buffer
;
4086 CHECK_OVERLAY (overlay
);
4088 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
4090 for (tail
= XOVERLAY (overlay
)->plist
;
4091 CONSP (tail
) && CONSP (XCDR (tail
));
4092 tail
= XCDR (XCDR (tail
)))
4093 if (EQ (XCAR (tail
), prop
))
4095 changed
= !EQ (XCAR (XCDR (tail
)), value
);
4096 XSETCAR (XCDR (tail
), value
);
4099 /* It wasn't in the list, so add it to the front. */
4100 changed
= !NILP (value
);
4101 XOVERLAY (overlay
)->plist
4102 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
4104 if (! NILP (buffer
))
4107 modify_overlay (XBUFFER (buffer
),
4108 marker_position (OVERLAY_START (overlay
)),
4109 marker_position (OVERLAY_END (overlay
)));
4110 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
4111 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
4112 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
4113 Fdelete_overlay (overlay
);
4119 /* Subroutine of report_overlay_modification. */
4121 /* Lisp vector holding overlay hook functions to call.
4122 Vector elements come in pairs.
4123 Each even-index element is a list of hook functions.
4124 The following odd-index element is the overlay they came from.
4126 Before the buffer change, we fill in this vector
4127 as we call overlay hook functions.
4128 After the buffer change, we get the functions to call from this vector.
4129 This way we always call the same functions before and after the change. */
4130 static Lisp_Object last_overlay_modification_hooks
;
4132 /* Number of elements actually used in last_overlay_modification_hooks. */
4133 static int last_overlay_modification_hooks_used
;
4135 /* Add one functionlist/overlay pair
4136 to the end of last_overlay_modification_hooks. */
4139 add_overlay_mod_hooklist (functionlist
, overlay
)
4140 Lisp_Object functionlist
, overlay
;
4142 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
4144 if (last_overlay_modification_hooks_used
== oldsize
)
4147 old
= last_overlay_modification_hooks
;
4148 last_overlay_modification_hooks
4149 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
4150 bcopy (XVECTOR (old
)->contents
,
4151 XVECTOR (last_overlay_modification_hooks
)->contents
,
4152 sizeof (Lisp_Object
) * oldsize
);
4154 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = functionlist
;
4155 AREF (last_overlay_modification_hooks
, last_overlay_modification_hooks_used
++) = overlay
;
4158 /* Run the modification-hooks of overlays that include
4159 any part of the text in START to END.
4160 If this change is an insertion, also
4161 run the insert-before-hooks of overlay starting at END,
4162 and the insert-after-hooks of overlay ending at START.
4164 This is called both before and after the modification.
4165 AFTER is nonzero when we call after the modification.
4167 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
4168 When AFTER is nonzero, they are the start position,
4169 the position after the inserted new text,
4170 and the length of deleted or replaced old text. */
4173 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
4174 Lisp_Object start
, end
;
4176 Lisp_Object arg1
, arg2
, arg3
;
4178 Lisp_Object prop
, overlay
;
4179 struct Lisp_Overlay
*tail
;
4180 /* 1 if this change is an insertion. */
4181 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
4182 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4187 /* We used to run the functions as soon as we found them and only register
4188 them in last_overlay_modification_hooks for the purpose of the `after'
4189 case. But running elisp code as we traverse the list of overlays is
4190 painful because the list can be modified by the elisp code so we had to
4191 copy at several places. We now simply do a read-only traversal that
4192 only collects the functions to run and we run them afterwards. It's
4193 simpler, especially since all the code was already there. -stef */
4197 /* We are being called before a change.
4198 Scan the overlays to find the functions to call. */
4199 last_overlay_modification_hooks_used
= 0;
4200 for (tail
= current_buffer
->overlays_before
; 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 endpos
= OVERLAY_POSITION (oend
);
4210 if (XFASTINT (start
) > endpos
)
4212 startpos
= OVERLAY_POSITION (ostart
);
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
);
4237 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4239 int startpos
, endpos
;
4240 Lisp_Object ostart
, oend
;
4242 XSETMISC (overlay
, tail
);
4244 ostart
= OVERLAY_START (overlay
);
4245 oend
= OVERLAY_END (overlay
);
4246 startpos
= OVERLAY_POSITION (ostart
);
4247 endpos
= OVERLAY_POSITION (oend
);
4248 if (XFASTINT (end
) < startpos
)
4250 if (insertion
&& (XFASTINT (start
) == startpos
4251 || XFASTINT (end
) == startpos
))
4253 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
4255 add_overlay_mod_hooklist (prop
, overlay
);
4257 if (insertion
&& (XFASTINT (start
) == endpos
4258 || XFASTINT (end
) == endpos
))
4260 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
4262 add_overlay_mod_hooklist (prop
, overlay
);
4264 /* Test for intersecting intervals. This does the right thing
4265 for both insertion and deletion. */
4266 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
4268 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
4270 add_overlay_mod_hooklist (prop
, overlay
);
4275 GCPRO4 (overlay
, arg1
, arg2
, arg3
);
4277 /* Call the functions recorded in last_overlay_modification_hooks.
4278 First copy the vector contents, in case some of these hooks
4279 do subsequent modification of the buffer. */
4280 int size
= last_overlay_modification_hooks_used
;
4281 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
4284 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
4285 copy
, size
* sizeof (Lisp_Object
));
4287 gcpro1
.nvars
= size
;
4289 for (i
= 0; i
< size
;)
4291 Lisp_Object prop
, overlay
;
4293 overlay
= copy
[i
++];
4294 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
4301 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
4302 Lisp_Object list
, overlay
;
4304 Lisp_Object arg1
, arg2
, arg3
;
4306 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
4308 GCPRO4 (list
, arg1
, arg2
, arg3
);
4310 while (CONSP (list
))
4313 call4 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
4315 call5 (XCAR (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
4321 /* Delete any zero-sized overlays at position POS, if the `evaporate'
4324 evaporate_overlays (pos
)
4327 Lisp_Object overlay
, hit_list
;
4328 struct Lisp_Overlay
*tail
;
4331 if (pos
<= current_buffer
->overlay_center
)
4332 for (tail
= current_buffer
->overlays_before
; tail
; tail
= tail
->next
)
4335 XSETMISC (overlay
, tail
);
4336 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4339 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4340 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4341 hit_list
= Fcons (overlay
, hit_list
);
4344 for (tail
= current_buffer
->overlays_after
; tail
; tail
= tail
->next
)
4347 XSETMISC (overlay
, tail
);
4348 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4351 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4352 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4353 hit_list
= Fcons (overlay
, hit_list
);
4355 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4356 Fdelete_overlay (XCAR (hit_list
));
4359 /* Somebody has tried to store a value with an unacceptable type
4360 in the slot with offset OFFSET. */
4363 buffer_slot_type_mismatch (offset
)
4369 switch (XINT (PER_BUFFER_TYPE (offset
)))
4372 type_name
= "integers";
4376 type_name
= "strings";
4380 type_name
= "symbols";
4387 sym
= PER_BUFFER_SYMBOL (offset
);
4388 error ("Only %s should be stored in the buffer-local variable %s",
4389 type_name
, SDATA (SYMBOL_NAME (sym
)));
4393 /***********************************************************************
4394 Allocation with mmap
4395 ***********************************************************************/
4397 #ifdef USE_MMAP_FOR_BUFFERS
4399 #include <sys/types.h>
4400 #include <sys/mman.h>
4403 #ifdef MAP_ANONYMOUS
4404 #define MAP_ANON MAP_ANONYMOUS
4411 #define MAP_FAILED ((void *) -1)
4424 /* Memory is allocated in regions which are mapped using mmap(2).
4425 The current implementation lets the system select mapped
4426 addresses; we're not using MAP_FIXED in general, except when
4427 trying to enlarge regions.
4429 Each mapped region starts with a mmap_region structure, the user
4430 area starts after that structure, aligned to MEM_ALIGN.
4432 +-----------------------+
4433 | struct mmap_info + |
4435 +-----------------------+
4439 +-----------------------+ */
4443 /* User-specified size. */
4444 size_t nbytes_specified
;
4446 /* Number of bytes mapped */
4447 size_t nbytes_mapped
;
4449 /* Pointer to the location holding the address of the memory
4450 allocated with the mmap'd block. The variable actually points
4451 after this structure. */
4454 /* Next and previous in list of all mmap'd regions. */
4455 struct mmap_region
*next
, *prev
;
4458 /* Doubly-linked list of mmap'd regions. */
4460 static struct mmap_region
*mmap_regions
;
4462 /* File descriptor for mmap. If we don't have anonymous mapping,
4463 /dev/zero will be opened on it. */
4467 /* Temporary storage for mmap_set_vars, see there. */
4469 static struct mmap_region
*mmap_regions_1
;
4470 static int mmap_fd_1
;
4472 /* Page size on this system. */
4474 static int mmap_page_size
;
4476 /* 1 means mmap has been intialized. */
4478 static int mmap_initialized_p
;
4480 /* Value is X rounded up to the next multiple of N. */
4482 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4484 /* Size of mmap_region structure plus padding. */
4486 #define MMAP_REGION_STRUCT_SIZE \
4487 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4489 /* Given a pointer P to the start of the user-visible part of a mapped
4490 region, return a pointer to the start of the region. */
4492 #define MMAP_REGION(P) \
4493 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4495 /* Given a pointer P to the start of a mapped region, return a pointer
4496 to the start of the user-visible part of the region. */
4498 #define MMAP_USER_AREA(P) \
4499 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4501 #define MEM_ALIGN sizeof (double)
4503 /* Predicate returning true if part of the address range [START .. END]
4504 is currently mapped. Used to prevent overwriting an existing
4507 Default is to conservativly assume the address range is occupied by
4508 something else. This can be overridden by system configuration
4509 files if system-specific means to determine this exists. */
4511 #ifndef MMAP_ALLOCATED_P
4512 #define MMAP_ALLOCATED_P(start, end) 1
4515 /* Function prototypes. */
4517 static int mmap_free_1
P_ ((struct mmap_region
*));
4518 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4519 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4520 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4521 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4522 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4523 static void mmap_init
P_ ((void));
4526 /* Return a region overlapping address range START...END, or null if
4527 none. END is not including, i.e. the last byte in the range
4530 static struct mmap_region
*
4531 mmap_find (start
, end
)
4532 POINTER_TYPE
*start
, *end
;
4534 struct mmap_region
*r
;
4535 char *s
= (char *) start
, *e
= (char *) end
;
4537 for (r
= mmap_regions
; r
; r
= r
->next
)
4539 char *rstart
= (char *) r
;
4540 char *rend
= rstart
+ r
->nbytes_mapped
;
4542 if (/* First byte of range, i.e. START, in this region? */
4543 (s
>= rstart
&& s
< rend
)
4544 /* Last byte of range, i.e. END - 1, in this region? */
4545 || (e
> rstart
&& e
<= rend
)
4546 /* First byte of this region in the range? */
4547 || (rstart
>= s
&& rstart
< e
)
4548 /* Last byte of this region in the range? */
4549 || (rend
> s
&& rend
<= e
))
4557 /* Unmap a region. P is a pointer to the start of the user-araa of
4558 the region. Value is non-zero if successful. */
4562 struct mmap_region
*r
;
4565 r
->next
->prev
= r
->prev
;
4567 r
->prev
->next
= r
->next
;
4569 mmap_regions
= r
->next
;
4571 if (munmap ((POINTER_TYPE
*) r
, r
->nbytes_mapped
) == -1)
4573 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4581 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4582 Value is non-zero if successful. */
4585 mmap_enlarge (r
, npages
)
4586 struct mmap_region
*r
;
4589 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4595 /* Unmap pages at the end of the region. */
4596 nbytes
= - npages
* mmap_page_size
;
4597 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4598 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4601 r
->nbytes_mapped
-= nbytes
;
4605 else if (npages
> 0)
4607 nbytes
= npages
* mmap_page_size
;
4609 /* Try to map additional pages at the end of the region. We
4610 cannot do this if the address range is already occupied by
4611 something else because mmap deletes any previous mapping.
4612 I'm not sure this is worth doing, let's see. */
4613 if (!MMAP_ALLOCATED_P (region_end
, region_end
+ nbytes
))
4617 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4618 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4619 if (p
== MAP_FAILED
)
4620 ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */
4621 else if (p
!= (POINTER_TYPE
*) region_end
)
4623 /* Kernels are free to choose a different address. In
4624 that case, unmap what we've mapped above; we have
4626 if (munmap (p
, nbytes
) == -1)
4627 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4631 r
->nbytes_mapped
+= nbytes
;
4641 /* Set or reset variables holding references to mapped regions. If
4642 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4643 non-zero, set all variables to the start of the user-areas
4646 This function is called from Fdump_emacs to ensure that the dumped
4647 Emacs doesn't contain references to memory that won't be mapped
4648 when Emacs starts. */
4651 mmap_set_vars (restore_p
)
4654 struct mmap_region
*r
;
4658 mmap_regions
= mmap_regions_1
;
4659 mmap_fd
= mmap_fd_1
;
4660 for (r
= mmap_regions
; r
; r
= r
->next
)
4661 *r
->var
= MMAP_USER_AREA (r
);
4665 for (r
= mmap_regions
; r
; r
= r
->next
)
4667 mmap_regions_1
= mmap_regions
;
4668 mmap_regions
= NULL
;
4669 mmap_fd_1
= mmap_fd
;
4675 /* Allocate a block of storage large enough to hold NBYTES bytes of
4676 data. A pointer to the data is returned in *VAR. VAR is thus the
4677 address of some variable which will use the data area.
4679 The allocation of 0 bytes is valid.
4681 If we can't allocate the necessary memory, set *VAR to null, and
4684 static POINTER_TYPE
*
4685 mmap_alloc (var
, nbytes
)
4694 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4695 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4698 if (p
== MAP_FAILED
)
4700 if (errno
!= ENOMEM
)
4701 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4706 struct mmap_region
*r
= (struct mmap_region
*) p
;
4708 r
->nbytes_specified
= nbytes
;
4709 r
->nbytes_mapped
= map
;
4712 r
->next
= mmap_regions
;
4717 p
= MMAP_USER_AREA (p
);
4724 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4725 resize it to size NBYTES. Change *VAR to reflect the new block,
4726 and return this value. If more memory cannot be allocated, then
4727 leave *VAR unchanged, and return null. */
4729 static POINTER_TYPE
*
4730 mmap_realloc (var
, nbytes
)
4734 POINTER_TYPE
*result
;
4739 result
= mmap_alloc (var
, nbytes
);
4740 else if (nbytes
== 0)
4743 result
= mmap_alloc (var
, nbytes
);
4747 struct mmap_region
*r
= MMAP_REGION (*var
);
4748 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4753 POINTER_TYPE
*old_ptr
= *var
;
4755 /* Try to map additional pages at the end of the region.
4756 If that fails, allocate a new region, copy data
4757 from the old region, then free it. */
4758 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4761 r
->nbytes_specified
= nbytes
;
4762 *var
= result
= old_ptr
;
4764 else if (mmap_alloc (var
, nbytes
))
4766 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4767 mmap_free_1 (MMAP_REGION (old_ptr
));
4769 r
= MMAP_REGION (result
);
4770 r
->nbytes_specified
= nbytes
;
4778 else if (room
- nbytes
>= mmap_page_size
)
4780 /* Shrinking by at least a page. Let's give some
4781 memory back to the system.
4783 The extra parens are to make the division happens first,
4784 on positive values, so we know it will round towards
4786 mmap_enlarge (r
, - ((room
- nbytes
) / mmap_page_size
));
4788 r
->nbytes_specified
= nbytes
;
4792 /* Leave it alone. */
4794 r
->nbytes_specified
= nbytes
;
4802 /* Free a block of relocatable storage whose data is pointed to by
4803 PTR. Store 0 in *PTR to show there's no block allocated. */
4813 mmap_free_1 (MMAP_REGION (*var
));
4819 /* Perform necessary intializations for the use of mmap. */
4825 /* The value of mmap_fd is initially 0 in temacs, and -1
4826 in a dumped Emacs. */
4829 /* No anonymous mmap -- we need the file descriptor. */
4830 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4832 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4834 #endif /* MAP_ANON == 0 */
4836 if (mmap_initialized_p
)
4838 mmap_initialized_p
= 1;
4844 mmap_page_size
= getpagesize ();
4847 #endif /* USE_MMAP_FOR_BUFFERS */
4851 /***********************************************************************
4852 Buffer-text Allocation
4853 ***********************************************************************/
4856 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4857 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4858 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4859 #endif /* REL_ALLOC */
4862 /* Allocate NBYTES bytes for buffer B's text buffer. */
4865 alloc_buffer_text (b
, nbytes
)
4872 #if defined USE_MMAP_FOR_BUFFERS
4873 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4874 #elif defined REL_ALLOC
4875 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4877 p
= xmalloc (nbytes
);
4886 b
->text
->beg
= (unsigned char *) p
;
4890 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4894 enlarge_buffer_text (b
, delta
)
4899 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4902 #if defined USE_MMAP_FOR_BUFFERS
4903 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4904 #elif defined REL_ALLOC
4905 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4907 p
= xrealloc (b
->text
->beg
, nbytes
);
4916 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4921 /* Free buffer B's text buffer. */
4924 free_buffer_text (b
)
4929 #if defined USE_MMAP_FOR_BUFFERS
4930 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4931 #elif defined REL_ALLOC
4932 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4934 xfree (b
->text
->beg
);
4937 BUF_BEG_ADDR (b
) = NULL
;
4943 /***********************************************************************
4945 ***********************************************************************/
4952 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4954 /* Make sure all markable slots in buffer_defaults
4955 are initialized reasonably, so mark_buffer won't choke. */
4956 reset_buffer (&buffer_defaults
);
4957 reset_buffer_local_variables (&buffer_defaults
, 1);
4958 reset_buffer (&buffer_local_symbols
);
4959 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4960 /* Prevent GC from getting confused. */
4961 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4962 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4963 BUF_INTERVALS (&buffer_defaults
) = 0;
4964 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4965 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4966 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4968 /* Set up the default values of various buffer slots. */
4969 /* Must do these before making the first buffer! */
4971 /* real setup is done in bindings.el */
4972 buffer_defaults
.mode_line_format
= build_string ("%-");
4973 buffer_defaults
.header_line_format
= Qnil
;
4974 buffer_defaults
.abbrev_mode
= Qnil
;
4975 buffer_defaults
.overwrite_mode
= Qnil
;
4976 buffer_defaults
.case_fold_search
= Qt
;
4977 buffer_defaults
.auto_fill_function
= Qnil
;
4978 buffer_defaults
.selective_display
= Qnil
;
4980 buffer_defaults
.selective_display_ellipses
= Qt
;
4982 buffer_defaults
.abbrev_table
= Qnil
;
4983 buffer_defaults
.display_table
= Qnil
;
4984 buffer_defaults
.undo_list
= Qnil
;
4985 buffer_defaults
.mark_active
= Qnil
;
4986 buffer_defaults
.file_format
= Qnil
;
4987 buffer_defaults
.auto_save_file_format
= Qt
;
4988 buffer_defaults
.overlays_before
= NULL
;
4989 buffer_defaults
.overlays_after
= NULL
;
4990 buffer_defaults
.overlay_center
= BEG
;
4992 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4993 buffer_defaults
.truncate_lines
= Qnil
;
4994 buffer_defaults
.ctl_arrow
= Qt
;
4995 buffer_defaults
.direction_reversed
= Qnil
;
4996 buffer_defaults
.cursor_type
= Qt
;
4997 buffer_defaults
.extra_line_spacing
= Qnil
;
4998 buffer_defaults
.cursor_in_non_selected_windows
= Qt
;
5001 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
5003 buffer_defaults
.enable_multibyte_characters
= Qt
;
5004 buffer_defaults
.buffer_file_coding_system
= Qnil
;
5005 XSETFASTINT (buffer_defaults
.fill_column
, 70);
5006 XSETFASTINT (buffer_defaults
.left_margin
, 0);
5007 buffer_defaults
.cache_long_line_scans
= Qnil
;
5008 buffer_defaults
.file_truename
= Qnil
;
5009 XSETFASTINT (buffer_defaults
.display_count
, 0);
5010 XSETFASTINT (buffer_defaults
.left_margin_cols
, 0);
5011 XSETFASTINT (buffer_defaults
.right_margin_cols
, 0);
5012 buffer_defaults
.left_fringe_width
= Qnil
;
5013 buffer_defaults
.right_fringe_width
= Qnil
;
5014 buffer_defaults
.fringes_outside_margins
= Qnil
;
5015 buffer_defaults
.scroll_bar_width
= Qnil
;
5016 buffer_defaults
.vertical_scroll_bar_type
= Qt
;
5017 buffer_defaults
.indicate_empty_lines
= Qnil
;
5018 buffer_defaults
.indicate_buffer_boundaries
= Qnil
;
5019 buffer_defaults
.fringe_indicator_alist
= Qnil
;
5020 buffer_defaults
.fringe_cursor_alist
= Qnil
;
5021 buffer_defaults
.scroll_up_aggressively
= Qnil
;
5022 buffer_defaults
.scroll_down_aggressively
= Qnil
;
5023 buffer_defaults
.display_time
= Qnil
;
5025 /* Assign the local-flags to the slots that have default values.
5026 The local flag is a bit that is used in the buffer
5027 to say that it has its own local value for the slot.
5028 The local flag bits are in the local_var_flags slot of the buffer. */
5030 /* Nothing can work if this isn't true */
5031 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
5033 /* 0 means not a lisp var, -1 means always local, else mask */
5034 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
5035 XSETINT (buffer_local_flags
.filename
, -1);
5036 XSETINT (buffer_local_flags
.directory
, -1);
5037 XSETINT (buffer_local_flags
.backed_up
, -1);
5038 XSETINT (buffer_local_flags
.save_length
, -1);
5039 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
5040 XSETINT (buffer_local_flags
.read_only
, -1);
5041 XSETINT (buffer_local_flags
.major_mode
, -1);
5042 XSETINT (buffer_local_flags
.mode_name
, -1);
5043 XSETINT (buffer_local_flags
.undo_list
, -1);
5044 XSETINT (buffer_local_flags
.mark_active
, -1);
5045 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
5046 XSETINT (buffer_local_flags
.file_truename
, -1);
5047 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
5048 XSETINT (buffer_local_flags
.file_format
, -1);
5049 XSETINT (buffer_local_flags
.auto_save_file_format
, -1);
5050 XSETINT (buffer_local_flags
.display_count
, -1);
5051 XSETINT (buffer_local_flags
.display_time
, -1);
5052 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
5055 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
5056 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
5057 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
5058 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
5059 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
5060 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
5062 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
5064 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
5065 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
5066 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
5067 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
5068 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
5069 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
5070 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
5072 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
5073 /* Make this one a permanent local. */
5074 buffer_permanent_local_flags
[idx
++] = 1;
5076 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
5077 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
5078 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
5079 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
5080 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
5081 /* Make this one a permanent local. */
5082 buffer_permanent_local_flags
[idx
++] = 1;
5083 XSETFASTINT (buffer_local_flags
.left_margin_cols
, idx
); ++idx
;
5084 XSETFASTINT (buffer_local_flags
.right_margin_cols
, idx
); ++idx
;
5085 XSETFASTINT (buffer_local_flags
.left_fringe_width
, idx
); ++idx
;
5086 XSETFASTINT (buffer_local_flags
.right_fringe_width
, idx
); ++idx
;
5087 XSETFASTINT (buffer_local_flags
.fringes_outside_margins
, idx
); ++idx
;
5088 XSETFASTINT (buffer_local_flags
.scroll_bar_width
, idx
); ++idx
;
5089 XSETFASTINT (buffer_local_flags
.vertical_scroll_bar_type
, idx
); ++idx
;
5090 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
5091 XSETFASTINT (buffer_local_flags
.indicate_buffer_boundaries
, idx
); ++idx
;
5092 XSETFASTINT (buffer_local_flags
.fringe_indicator_alist
, idx
); ++idx
;
5093 XSETFASTINT (buffer_local_flags
.fringe_cursor_alist
, idx
); ++idx
;
5094 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
5095 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
5096 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
5097 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
5098 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
5099 XSETFASTINT (buffer_local_flags
.cursor_in_non_selected_windows
, idx
); ++idx
;
5101 /* Need more room? */
5102 if (idx
>= MAX_PER_BUFFER_VARS
)
5104 last_per_buffer_idx
= idx
;
5106 Vbuffer_alist
= Qnil
;
5110 QSFundamental
= build_string ("Fundamental");
5112 Qfundamental_mode
= intern ("fundamental-mode");
5113 buffer_defaults
.major_mode
= Qfundamental_mode
;
5115 Qmode_class
= intern ("mode-class");
5117 Qprotected_field
= intern ("protected-field");
5119 Qpermanent_local
= intern ("permanent-local");
5121 Qkill_buffer_hook
= intern ("kill-buffer-hook");
5122 Fput (Qkill_buffer_hook
, Qpermanent_local
, Qt
);
5124 Qucs_set_table_for_input
= intern ("ucs-set-table-for-input");
5126 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
5128 /* super-magic invisible buffer */
5129 Vbuffer_alist
= Qnil
;
5131 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5133 inhibit_modification_hooks
= 0;
5143 #ifdef USE_MMAP_FOR_BUFFERS
5145 /* When using the ralloc implementation based on mmap(2), buffer
5146 text pointers will have been set to null in the dumped Emacs.
5150 for (b
= all_buffers
; b
; b
= b
->next
)
5151 if (b
->text
->beg
== NULL
)
5152 enlarge_buffer_text (b
, 0);
5154 #endif /* USE_MMAP_FOR_BUFFERS */
5156 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
5157 if (NILP (buffer_defaults
.enable_multibyte_characters
))
5158 Fset_buffer_multibyte (Qnil
);
5160 pwd
= get_current_dir_name ();
5163 fatal ("`get_current_dir_name' failed: %s\n", strerror (errno
));
5166 /* Maybe this should really use some standard subroutine
5167 whose definition is filename syntax dependent. */
5169 if (!(IS_DIRECTORY_SEP (pwd
[len
- 1])))
5171 /* Grow buffer to add directory separator and '\0'. */
5172 pwd
= (char *) xrealloc (pwd
, len
+ 2);
5173 pwd
[len
] = DIRECTORY_SEP
;
5174 pwd
[len
+ 1] = '\0';
5176 #endif /* not VMS */
5178 current_buffer
->directory
= make_unibyte_string (pwd
, strlen (pwd
));
5179 if (! NILP (buffer_defaults
.enable_multibyte_characters
))
5180 /* At this moment, we still don't know how to decode the
5181 directory name. So, we keep the bytes in multibyte form so
5182 that ENCODE_FILE correctly gets the original bytes. */
5183 current_buffer
->directory
5184 = string_to_multibyte (current_buffer
->directory
);
5186 /* Add /: to the front of the name
5187 if it would otherwise be treated as magic. */
5188 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
5190 /* If the default dir is just /, TEMP is non-nil
5191 because of the ange-ftp completion handler.
5192 However, it is not necessary to turn / into /:/.
5193 So avoid doing that. */
5194 && strcmp ("/", SDATA (current_buffer
->directory
)))
5195 current_buffer
->directory
5196 = concat2 (build_string ("/:"), current_buffer
->directory
);
5198 temp
= get_minibuffer (0);
5199 XBUFFER (temp
)->directory
= current_buffer
->directory
;
5204 /* initialize the buffer routines */
5208 staticpro (&last_overlay_modification_hooks
);
5209 last_overlay_modification_hooks
5210 = Fmake_vector (make_number (10), Qnil
);
5212 staticpro (&Vbuffer_defaults
);
5213 staticpro (&Vbuffer_local_symbols
);
5214 staticpro (&Qfundamental_mode
);
5215 staticpro (&Qmode_class
);
5216 staticpro (&QSFundamental
);
5217 staticpro (&Vbuffer_alist
);
5218 staticpro (&Qprotected_field
);
5219 staticpro (&Qpermanent_local
);
5220 staticpro (&Qkill_buffer_hook
);
5221 Qoverlayp
= intern ("overlayp");
5222 staticpro (&Qoverlayp
);
5223 Qevaporate
= intern ("evaporate");
5224 staticpro (&Qevaporate
);
5225 Qmodification_hooks
= intern ("modification-hooks");
5226 staticpro (&Qmodification_hooks
);
5227 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
5228 staticpro (&Qinsert_in_front_hooks
);
5229 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
5230 staticpro (&Qinsert_behind_hooks
);
5231 Qget_file_buffer
= intern ("get-file-buffer");
5232 staticpro (&Qget_file_buffer
);
5233 Qpriority
= intern ("priority");
5234 staticpro (&Qpriority
);
5235 Qwindow
= intern ("window");
5236 staticpro (&Qwindow
);
5237 Qbefore_string
= intern ("before-string");
5238 staticpro (&Qbefore_string
);
5239 Qafter_string
= intern ("after-string");
5240 staticpro (&Qafter_string
);
5241 Qfirst_change_hook
= intern ("first-change-hook");
5242 staticpro (&Qfirst_change_hook
);
5243 Qbefore_change_functions
= intern ("before-change-functions");
5244 staticpro (&Qbefore_change_functions
);
5245 Qafter_change_functions
= intern ("after-change-functions");
5246 staticpro (&Qafter_change_functions
);
5247 staticpro (&Qucs_set_table_for_input
);
5249 Qkill_buffer_query_functions
= intern ("kill-buffer-query-functions");
5250 staticpro (&Qkill_buffer_query_functions
);
5252 Fput (Qprotected_field
, Qerror_conditions
,
5253 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
5254 Fput (Qprotected_field
, Qerror_message
,
5255 build_string ("Attempt to modify a protected field"));
5257 /* All these use DEFVAR_LISP_NOPRO because the slots in
5258 buffer_defaults will all be marked via Vbuffer_defaults. */
5260 DEFVAR_LISP_NOPRO ("default-mode-line-format",
5261 &buffer_defaults
.mode_line_format
,
5262 doc
: /* Default value of `mode-line-format' for buffers that don't override it.
5263 This is the same as (default-value 'mode-line-format). */);
5265 DEFVAR_LISP_NOPRO ("default-header-line-format",
5266 &buffer_defaults
.header_line_format
,
5267 doc
: /* Default value of `header-line-format' for buffers that don't override it.
5268 This is the same as (default-value 'header-line-format). */);
5270 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
5271 doc
: /* Default value of `cursor-type' for buffers that don't override it.
5272 This is the same as (default-value 'cursor-type). */);
5274 DEFVAR_LISP_NOPRO ("default-line-spacing",
5275 &buffer_defaults
.extra_line_spacing
,
5276 doc
: /* Default value of `line-spacing' for buffers that don't override it.
5277 This is the same as (default-value 'line-spacing). */);
5279 DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows",
5280 &buffer_defaults
.cursor_in_non_selected_windows
,
5281 doc
: /* Default value of `cursor-in-non-selected-windows'.
5282 This is the same as (default-value 'cursor-in-non-selected-windows). */);
5284 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
5285 &buffer_defaults
.abbrev_mode
,
5286 doc
: /* Default value of `abbrev-mode' for buffers that do not override it.
5287 This is the same as (default-value 'abbrev-mode). */);
5289 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
5290 &buffer_defaults
.ctl_arrow
,
5291 doc
: /* Default value of `ctl-arrow' for buffers that do not override it.
5292 This is the same as (default-value 'ctl-arrow). */);
5294 DEFVAR_LISP_NOPRO ("default-direction-reversed",
5295 &buffer_defaults
.direction_reversed
,
5296 doc
: /* Default value of `direction-reversed' for buffers that do not override it.
5297 This is the same as (default-value 'direction-reversed). */);
5299 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
5300 &buffer_defaults
.enable_multibyte_characters
,
5301 doc
: /* *Default value of `enable-multibyte-characters' for buffers not overriding it.
5302 This is the same as (default-value 'enable-multibyte-characters). */);
5304 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
5305 &buffer_defaults
.buffer_file_coding_system
,
5306 doc
: /* Default value of `buffer-file-coding-system' for buffers not overriding it.
5307 This is the same as (default-value 'buffer-file-coding-system). */);
5309 DEFVAR_LISP_NOPRO ("default-truncate-lines",
5310 &buffer_defaults
.truncate_lines
,
5311 doc
: /* Default value of `truncate-lines' for buffers that do not override it.
5312 This is the same as (default-value 'truncate-lines). */);
5314 DEFVAR_LISP_NOPRO ("default-fill-column",
5315 &buffer_defaults
.fill_column
,
5316 doc
: /* Default value of `fill-column' for buffers that do not override it.
5317 This is the same as (default-value 'fill-column). */);
5319 DEFVAR_LISP_NOPRO ("default-left-margin",
5320 &buffer_defaults
.left_margin
,
5321 doc
: /* Default value of `left-margin' for buffers that do not override it.
5322 This is the same as (default-value 'left-margin). */);
5324 DEFVAR_LISP_NOPRO ("default-tab-width",
5325 &buffer_defaults
.tab_width
,
5326 doc
: /* Default value of `tab-width' for buffers that do not override it.
5327 This is the same as (default-value 'tab-width). */);
5329 DEFVAR_LISP_NOPRO ("default-case-fold-search",
5330 &buffer_defaults
.case_fold_search
,
5331 doc
: /* Default value of `case-fold-search' for buffers that don't override it.
5332 This is the same as (default-value 'case-fold-search). */);
5335 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
5336 &buffer_defaults
.buffer_file_type
,
5337 doc
: /* Default file type for buffers that do not override it.
5338 This is the same as (default-value 'buffer-file-type).
5339 The file type is nil for text, t for binary. */);
5342 DEFVAR_LISP_NOPRO ("default-left-margin-width",
5343 &buffer_defaults
.left_margin_cols
,
5344 doc
: /* Default value of `left-margin-width' for buffers that don't override it.
5345 This is the same as (default-value 'left-margin-width). */);
5347 DEFVAR_LISP_NOPRO ("default-right-margin-width",
5348 &buffer_defaults
.right_margin_cols
,
5349 doc
: /* Default value of `right-margin-width' for buffers that don't override it.
5350 This is the same as (default-value 'right-margin-width). */);
5352 DEFVAR_LISP_NOPRO ("default-left-fringe-width",
5353 &buffer_defaults
.left_fringe_width
,
5354 doc
: /* Default value of `left-fringe-width' for buffers that don't override it.
5355 This is the same as (default-value 'left-fringe-width). */);
5357 DEFVAR_LISP_NOPRO ("default-right-fringe-width",
5358 &buffer_defaults
.right_fringe_width
,
5359 doc
: /* Default value of `right-fringe-width' for buffers that don't override it.
5360 This is the same as (default-value 'right-fringe-width). */);
5362 DEFVAR_LISP_NOPRO ("default-fringes-outside-margins",
5363 &buffer_defaults
.fringes_outside_margins
,
5364 doc
: /* Default value of `fringes-outside-margins' for buffers that don't override it.
5365 This is the same as (default-value 'fringes-outside-margins). */);
5367 DEFVAR_LISP_NOPRO ("default-scroll-bar-width",
5368 &buffer_defaults
.scroll_bar_width
,
5369 doc
: /* Default value of `scroll-bar-width' for buffers that don't override it.
5370 This is the same as (default-value 'scroll-bar-width). */);
5372 DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar",
5373 &buffer_defaults
.vertical_scroll_bar_type
,
5374 doc
: /* Default value of `vertical-scroll-bar' for buffers that don't override it.
5375 This is the same as (default-value 'vertical-scroll-bar). */);
5377 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
5378 &buffer_defaults
.indicate_empty_lines
,
5379 doc
: /* Default value of `indicate-empty-lines' for buffers that don't override it.
5380 This is the same as (default-value 'indicate-empty-lines). */);
5382 DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries",
5383 &buffer_defaults
.indicate_buffer_boundaries
,
5384 doc
: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it.
5385 This is the same as (default-value 'indicate-buffer-boundaries). */);
5387 DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist",
5388 &buffer_defaults
.fringe_indicator_alist
,
5389 doc
: /* Default value of `fringe-indicator-alist' for buffers that don't override it.
5390 This is the same as (default-value 'fringe-indicator-alist'). */);
5392 DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist",
5393 &buffer_defaults
.fringe_cursor_alist
,
5394 doc
: /* Default value of `fringe-cursor-alist' for buffers that don't override it.
5395 This is the same as (default-value 'fringe-cursor-alist'). */);
5397 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
5398 &buffer_defaults
.scroll_up_aggressively
,
5399 doc
: /* Default value of `scroll-up-aggressively'.
5400 This value applies in buffers that don't have their own local values.
5401 This variable is an alias for (default-value 'scroll-up-aggressively). */);
5403 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
5404 &buffer_defaults
.scroll_down_aggressively
,
5405 doc
: /* Default value of `scroll-down-aggressively'.
5406 This value applies in buffers that don't have their own local values.
5407 This variable is an alias for (default-value 'scroll-down-aggressively). */);
5409 DEFVAR_PER_BUFFER ("header-line-format",
5410 ¤t_buffer
->header_line_format
,
5412 doc
: /* Analogous to `mode-line-format', but controls the header line.
5413 The header line appears, optionally, at the top of a window;
5414 the mode line appears at the bottom. */);
5416 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5418 doc
: /* Template for displaying mode line for current buffer.
5419 Each buffer has its own value of this variable.
5420 Value may be nil, a string, a symbol or a list or cons cell.
5421 A value of nil means don't display a mode line.
5422 For a symbol, its value is used (but it is ignored if t or nil).
5423 A string appearing directly as the value of a symbol is processed verbatim
5424 in that the %-constructs below are not recognized.
5425 Note that unless the symbol is marked as a `risky-local-variable', all
5426 properties in any strings, as well as all :eval and :propertize forms
5427 in the value of that symbol will be ignored.
5428 For a list of the form `(:eval FORM)', FORM is evaluated and the result
5429 is used as a mode line element. Be careful--FORM should not load any files,
5430 because that can cause an infinite recursion.
5431 For a list of the form `(:propertize ELT PROPS...)', ELT is displayed
5432 with the specified properties PROPS applied.
5433 For a list whose car is a symbol, the symbol's value is taken,
5434 and if that is non-nil, the cadr of the list is processed recursively.
5435 Otherwise, the caddr of the list (if there is one) is processed.
5436 For a list whose car is a string or list, each element is processed
5437 recursively and the results are effectively concatenated.
5438 For a list whose car is an integer, the cdr of the list is processed
5439 and padded (if the number is positive) or truncated (if negative)
5440 to the width specified by that number.
5441 A string is printed verbatim in the mode line except for %-constructs:
5442 (%-constructs are allowed when the string is the entire mode-line-format
5443 or when it is found in a cons-cell or a list)
5444 %b -- print buffer name. %f -- print visited file name.
5445 %F -- print frame name.
5446 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
5447 %& is like %*, but ignore read-only-ness.
5448 % means buffer is read-only and * means it is modified.
5449 For a modified read-only buffer, %* gives % and %+ gives *.
5450 %s -- print process status. %l -- print the current line number.
5451 %c -- print the current column number (this makes editing slower).
5452 To make the column number update correctly in all cases,
5453 `column-number-mode' must be non-nil.
5454 %i -- print the size of the buffer.
5455 %I -- like %i, but use k, M, G, etc., to abbreviate.
5456 %p -- print percent of buffer above top of window, or Top, Bot or All.
5457 %P -- print percent of buffer above bottom of window, perhaps plus Top,
5458 or print Bottom or All.
5459 %n -- print Narrow if appropriate.
5460 %t -- visited file is text or binary (if OS supports this distinction).
5461 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.
5462 %Z -- like %z, but including the end-of-line format.
5463 %e -- print error message about full memory.
5464 %[ -- print one [ for each recursive editing level. %] similar.
5465 %% -- print %. %- -- print infinitely many dashes.
5466 Decimal digits after the % specify field width to which to pad. */);
5468 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5469 doc
: /* *Major mode for new buffers. Defaults to `fundamental-mode'.
5470 nil here means use current buffer's major mode, provided it is not
5471 marked as "special".
5473 When a mode is used by default, `find-file' switches to it
5474 before it reads the contents into the buffer and before
5475 it finishes setting up the buffer. Thus, the mode and
5476 its hooks should not expect certain variables such as
5477 `buffer-read-only' and `buffer-file-coding-system' to be set up. */);
5479 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5480 make_number (Lisp_Symbol
),
5481 doc
: /* Symbol for current buffer's major mode. */);
5483 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5485 doc
: /* Pretty name of current buffer's major mode (a string). */);
5487 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5488 doc
: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */);
5490 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5492 doc
: /* *Non-nil if searches and matches should ignore case. */);
5494 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5495 make_number (Lisp_Int
),
5496 doc
: /* *Column beyond which automatic line-wrapping should happen.
5497 Interactively, you can set the buffer local value using \\[set-fill-column]. */);
5499 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5500 make_number (Lisp_Int
),
5501 doc
: /* *Column for the default indent-line-function to indent to.
5502 Linefeed indents to this column in Fundamental mode. */);
5504 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5505 make_number (Lisp_Int
),
5506 doc
: /* *Distance between tab stops (for display of tab characters), in columns. */);
5508 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5509 doc
: /* *Non-nil means display control chars with uparrow.
5510 A value of nil means use backslash and octal digits.
5511 This variable does not apply to characters whose display is specified
5512 in the current display table (if there is one). */);
5514 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5515 ¤t_buffer
->enable_multibyte_characters
,
5517 doc
: /* Non-nil means the buffer contents are regarded as multi-byte characters.
5518 Otherwise they are regarded as unibyte. This affects the display,
5519 file I/O and the behavior of various editing commands.
5521 This variable is buffer-local but you cannot set it directly;
5522 use the function `set-buffer-multibyte' to change a buffer's representation.
5523 Changing its default value with `setq-default' is supported.
5524 See also variable `default-enable-multibyte-characters' and Info node
5525 `(elisp)Text Representations'. */);
5526 XSYMBOL (intern ("enable-multibyte-characters"))->constant
= 1;
5528 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5529 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5530 doc
: /* Coding system to be used for encoding the buffer contents on saving.
5531 This variable applies to saving the buffer, and also to `write-region'
5532 and other functions that use `write-region'.
5533 It does not apply to sending output to subprocesses, however.
5535 If this is nil, the buffer is saved without any code conversion
5536 unless some coding system is specified in `file-coding-system-alist'
5537 for the buffer file.
5539 If the text to be saved cannot be encoded as specified by this variable,
5540 an alternative encoding is selected by `select-safe-coding-system', which see.
5542 The variable `coding-system-for-write', if non-nil, overrides this variable.
5544 This variable is never applied to a way of decoding a file while reading it. */);
5546 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5548 doc
: /* *Non-nil means lines in the buffer are displayed right to left. */);
5550 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5551 doc
: /* *Non-nil means do not display continuation lines.
5552 Instead, give each line of text just one screen line.
5554 Note that this is overridden by the variable
5555 `truncate-partial-width-windows' if that variable is non-nil
5556 and this buffer is not full-frame width. */);
5559 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5561 doc
: /* Non-nil if the visited file is a binary file.
5562 This variable is meaningful on MS-DOG and Windows NT.
5563 On those systems, it is automatically local in every buffer.
5564 On other systems, this variable is normally always nil. */);
5567 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5568 make_number (Lisp_String
),
5569 doc
: /* Name of default directory of current buffer. Should end with slash.
5570 To interactively change the default directory, use command `cd'. */);
5572 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5574 doc
: /* Function called (if non-nil) to perform auto-fill.
5575 It is called after self-inserting any character specified in
5576 the `auto-fill-chars' table.
5577 NOTE: This variable is not a hook;
5578 its value may not be a list of functions. */);
5580 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5581 make_number (Lisp_String
),
5582 doc
: /* Name of file visited in current buffer, or nil if not visiting a file. */);
5584 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5585 make_number (Lisp_String
),
5586 doc
: /* Abbreviated truename of file visited in current buffer, or nil if none.
5587 The truename of a file is calculated by `file-truename'
5588 and then abbreviated with `abbreviate-file-name'. */);
5590 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5591 ¤t_buffer
->auto_save_file_name
,
5592 make_number (Lisp_String
),
5593 doc
: /* Name of file for auto-saving current buffer.
5594 If it is nil, that means don't auto-save this buffer. */);
5596 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5597 doc
: /* Non-nil if this buffer is read-only. */);
5599 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5600 doc
: /* Non-nil if this buffer's file has been backed up.
5601 Backing up is done before the first time the file is saved. */);
5603 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5604 make_number (Lisp_Int
),
5605 doc
: /* Length of current buffer when last read in, saved or auto-saved.
5608 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5610 doc
: /* Non-nil enables selective display.
5611 An Integer N as value means display only lines
5612 that start with less than n columns of space.
5613 A value of t means that the character ^M makes itself and
5614 all the rest of the line invisible; also, when saving the buffer
5615 in a file, save the ^M as a newline. */);
5618 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5619 ¤t_buffer
->selective_display_ellipses
,
5621 doc
: /* Non-nil means display ... on previous line when a line is invisible. */);
5624 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5625 doc
: /* Non-nil if self-insertion should replace existing text.
5626 The value should be one of `overwrite-mode-textual',
5627 `overwrite-mode-binary', or nil.
5628 If it is `overwrite-mode-textual', self-insertion still
5629 inserts at the end of a line, and inserts when point is before a tab,
5630 until the tab is filled in.
5631 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */);
5633 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5635 doc
: /* Display table that controls display of the contents of current buffer.
5637 If this variable is nil, the value of `standard-display-table' is used.
5638 Each window can have its own, overriding display table, see
5639 `set-window-display-table' and `window-display-table'.
5641 The display table is a char-table created with `make-display-table'.
5642 A char-table is an array indexed by character codes. Normal array
5643 primitives `aref' and `aset' can be used to access elements of a char-table.
5645 Each of the char-table elements control how to display the corresponding
5646 text character: the element at index C in the table says how to display
5647 the character whose code is C. Each element should be a vector of
5648 characters or nil. nil means display the character in the default fashion;
5649 otherwise, the characters from the vector are delivered to the screen
5650 instead of the original character.
5652 For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display
5653 a capital Y instead of each X character.
5655 In addition, a char-table has six extra slots to control the display of:
5657 the end of a truncated screen line (extra-slot 0, a single character);
5658 the end of a continued line (extra-slot 1, a single character);
5659 the escape character used to display character codes in octal
5660 (extra-slot 2, a single character);
5661 the character used as an arrow for control characters (extra-slot 3,
5662 a single character);
5663 the decoration indicating the presence of invisible lines (extra-slot 4,
5664 a vector of characters);
5665 the character used to draw the border between side-by-side windows
5666 (extra-slot 5, a single character).
5668 See also the functions `display-table-slot' and `set-display-table-slot'. */);
5670 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_cols
,
5672 doc
: /* *Width of left marginal area for display of a buffer.
5673 A value of nil means no marginal area. */);
5675 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_cols
,
5677 doc
: /* *Width of right marginal area for display of a buffer.
5678 A value of nil means no marginal area. */);
5680 DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer
->left_fringe_width
,
5682 doc
: /* *Width of this buffer's left fringe (in pixels).
5683 A value of 0 means no left fringe is shown in this buffer's window.
5684 A value of nil means to use the left fringe width from the window's frame. */);
5686 DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer
->right_fringe_width
,
5688 doc
: /* *Width of this buffer's right fringe (in pixels).
5689 A value of 0 means no right fringe is shown in this buffer's window.
5690 A value of nil means to use the right fringe width from the window's frame. */);
5692 DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer
->fringes_outside_margins
,
5694 doc
: /* *Non-nil means to display fringes outside display margins.
5695 A value of nil means to display fringes between margins and buffer text. */);
5697 DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer
->scroll_bar_width
,
5699 doc
: /* *Width of this buffer's scroll bars in pixels.
5700 A value of nil means to use the scroll bar width from the window's frame. */);
5702 DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer
->vertical_scroll_bar_type
,
5704 doc
: /* *Position of this buffer's vertical scroll bar.
5705 The value takes effect whenever you tell a window to display this buffer;
5706 for instance, with `set-window-buffer' or when `display-buffer' displays it.
5708 A value of `left' or `right' means put the vertical scroll bar at that side
5709 of the window; a value of nil means don't show any vertical scroll bars.
5710 A value of t (the default) means do whatever the window's frame specifies. */);
5712 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5713 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5714 doc
: /* *Visually indicate empty lines after the buffer end.
5715 If non-nil, a bitmap is displayed in the left fringe of a window on
5716 window-systems. */);
5718 DEFVAR_PER_BUFFER ("indicate-buffer-boundaries",
5719 ¤t_buffer
->indicate_buffer_boundaries
, Qnil
,
5720 doc
: /* *Visually indicate buffer boundaries and scrolling.
5721 If non-nil, the first and last line of the buffer are marked in the fringe
5722 of a window on window-systems with angle bitmaps, or if the window can be
5723 scrolled, the top and bottom line of the window are marked with up and down
5726 If value is a symbol `left' or `right', both angle and arrow bitmaps
5727 are displayed in the left or right fringe, resp. Any other value
5728 that doesn't look like an alist means display the angle bitmaps in
5729 the left fringe but no arrows.
5731 You can exercise more precise control by using an alist as the
5732 value. Each alist element (INDICATOR . POSITION) specifies
5733 where to show one of the indicators. INDICATOR is one of `top',
5734 `bottom', `up', `down', or t, which specifies the default position,
5735 and POSITION is one of `left', `right', or nil, meaning do not show
5738 For example, ((top . left) (t . right)) places the top angle bitmap in
5739 left fringe, the bottom angle bitmap in right fringe, and both arrow
5740 bitmaps in right fringe. To show just the angle bitmaps in the left
5741 fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */);
5743 DEFVAR_PER_BUFFER ("fringe-indicator-alist",
5744 ¤t_buffer
->fringe_indicator_alist
, Qnil
,
5745 doc
: /* *Mapping from logical to physical fringe indicator bitmaps.
5746 The value is an alist where each element (INDICATOR . BITMAPS)
5747 specifies the fringe bitmaps used to display a specific logical
5750 INDICATOR specifies the logical indicator type which is one of the
5751 following symbols: `truncation' , `continuation', `overlay-arrow',
5752 `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'.
5754 BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies
5755 the actual bitmap shown in the left or right fringe for the logical
5756 indicator. LEFT and RIGHT are the bitmaps shown in the left and/or
5757 right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps
5758 are used only for the `bottom' and `one-line' indicators when the last
5759 \(only) line in has no final newline. BITMAPS may also be a single
5760 symbol which is used in both left and right fringes. */);
5762 DEFVAR_PER_BUFFER ("fringe-cursor-alist",
5763 ¤t_buffer
->fringe_cursor_alist
, Qnil
,
5764 doc
: /* *Mapping from logical to physical fringe cursor bitmaps.
5765 The value is an alist where each element (CURSOR . BITMAP)
5766 specifies the fringe bitmaps used to display a specific logical
5767 cursor type in the fringe.
5769 CURSOR specifies the logical cursor type which is one of the following
5770 symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last
5771 one is used to show a hollow cursor on narrow lines display lines
5772 where the normal hollow cursor will not fit.
5774 BITMAP is the corresponding fringe bitmap shown for the logical
5777 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5778 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5779 doc
: /* How far to scroll windows upward.
5780 If you move point off the bottom, the window scrolls automatically.
5781 This variable controls how far it scrolls. nil, the default,
5782 means scroll to center point. A fraction means scroll to put point
5783 that fraction of the window's height from the bottom of the window.
5784 When the value is 0.0, point goes at the bottom line, which in the simple
5785 case that you moved off with C-f means scrolling just one line. 1.0 means
5786 point goes at the top, so that in that simple case, the window
5787 scrolls by a full window height. Meaningful values are
5788 between 0.0 and 1.0, inclusive. */);
5790 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5791 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5792 doc
: /* How far to scroll windows downward.
5793 If you move point off the top, the window scrolls automatically.
5794 This variable controls how far it scrolls. nil, the default,
5795 means scroll to center point. A fraction means scroll to put point
5796 that fraction of the window's height from the top of the window.
5797 When the value is 0.0, point goes at the top line, which in the simple
5798 case that you moved off with C-b means scrolling just one line. 1.0 means
5799 point goes at the bottom, so that in that simple case, the window
5800 scrolls by a full window height. Meaningful values are
5801 between 0.0 and 1.0, inclusive. */);
5803 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5807 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5808 doc
: /* List of functions to call before each text change.
5809 Two arguments are passed to each function: the positions of
5810 the beginning and end of the range of old text to be changed.
5811 \(For an insertion, the beginning and end are at the same place.)
5812 No information is given about the length of the text after the change.
5814 Buffer changes made while executing the `before-change-functions'
5815 don't call any before-change or after-change functions.
5816 That's because these variables are temporarily set to nil.
5817 As a result, a hook function cannot straightforwardly alter the value of
5818 these variables. See the Emacs Lisp manual for a way of
5819 accomplishing an equivalent result by using other variables.
5821 If an unhandled error happens in running these functions,
5822 the variable's value remains nil. That prevents the error
5823 from happening repeatedly and making Emacs nonfunctional. */);
5824 Vbefore_change_functions
= Qnil
;
5826 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5827 doc
: /* List of functions to call after each text change.
5828 Three arguments are passed to each function: the positions of
5829 the beginning and end of the range of changed text,
5830 and the length in bytes of the pre-change text replaced by that range.
5831 \(For an insertion, the pre-change length is zero;
5832 for a deletion, that length is the number of bytes deleted,
5833 and the post-change beginning and end are at the same place.)
5835 Buffer changes made while executing the `after-change-functions'
5836 don't call any before-change or after-change functions.
5837 That's because these variables are temporarily set to nil.
5838 As a result, a hook function cannot straightforwardly alter the value of
5839 these variables. See the Emacs Lisp manual for a way of
5840 accomplishing an equivalent result by using other variables.
5842 If an unhandled error happens in running these functions,
5843 the variable's value remains nil. That prevents the error
5844 from happening repeatedly and making Emacs nonfunctional. */);
5845 Vafter_change_functions
= Qnil
;
5847 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5848 doc
: /* A list of functions to call before changing a buffer which is unmodified.
5849 The functions are run using the `run-hooks' function. */);
5850 Vfirst_change_hook
= Qnil
;
5852 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5853 doc
: /* List of undo entries in current buffer.
5854 Recent changes come first; older changes follow newer.
5856 An entry (BEG . END) represents an insertion which begins at
5857 position BEG and ends at position END.
5859 An entry (TEXT . POSITION) represents the deletion of the string TEXT
5860 from (abs POSITION). If POSITION is positive, point was at the front
5861 of the text being deleted; if negative, point was at the end.
5863 An entry (t HIGH . LOW) indicates that the buffer previously had
5864 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions
5865 of the visited file's modification time, as of that time. If the
5866 modification time of the most recent save is different, this entry is
5869 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
5870 was modified between BEG and END. PROPERTY is the property name,
5871 and VALUE is the old value.
5873 An entry (apply FUN-NAME . ARGS) means undo the change with
5874 \(apply FUN-NAME ARGS).
5876 An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo
5877 in the active region. BEG and END is the range affected by this entry
5878 and DELTA is the number of bytes added or deleted in that range by
5881 An entry (MARKER . DISTANCE) indicates that the marker MARKER
5882 was adjusted in position by the offset DISTANCE (an integer).
5884 An entry of the form POSITION indicates that point was at the buffer
5885 location given by the integer. Undoing an entry of this form places
5888 nil marks undo boundaries. The undo command treats the changes
5889 between two undo boundaries as a single step to be undone.
5891 If the value of the variable is t, undo information is not recorded. */);
5893 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5894 doc
: /* Non-nil means the mark and region are currently active in this buffer. */);
5896 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5897 doc
: /* Non-nil means that Emacs should use caches to handle long lines more quickly.
5899 Normally, the line-motion functions work by scanning the buffer for
5900 newlines. Columnar operations (like `move-to-column' and
5901 `compute-motion') also work by scanning the buffer, summing character
5902 widths as they go. This works well for ordinary text, but if the
5903 buffer's lines are very long (say, more than 500 characters), these
5904 motion functions will take longer to execute. Emacs may also take
5905 longer to update the display.
5907 If `cache-long-line-scans' is non-nil, these motion functions cache the
5908 results of their scans, and consult the cache to avoid rescanning
5909 regions of the buffer until the text is modified. The caches are most
5910 beneficial when they prevent the most searching---that is, when the
5911 buffer contains long lines and large regions of characters with the
5912 same, fixed screen width.
5914 When `cache-long-line-scans' is non-nil, processing short lines will
5915 become slightly slower (because of the overhead of consulting the
5916 cache), and the caches will use memory roughly proportional to the
5917 number of newlines and characters whose screen width varies.
5919 The caches require no explicit maintenance; their accuracy is
5920 maintained internally by the Emacs primitives. Enabling or disabling
5921 the cache should not affect the behavior of any of the motion
5922 functions; it should only affect their performance. */);
5924 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5925 doc
: /* Value of point before the last series of scroll operations, or nil. */);
5927 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5928 doc
: /* List of formats to use when saving this buffer.
5929 Formats are defined by `format-alist'. This variable is
5930 set when a file is visited. */);
5932 DEFVAR_PER_BUFFER ("buffer-auto-save-file-format",
5933 ¤t_buffer
->auto_save_file_format
, Qnil
,
5934 doc
: /* *Format in which to write auto-save files.
5935 Should be a list of symbols naming formats that are defined in `format-alist'.
5936 If it is t, which is the default, auto-save files are written in the
5937 same format as a regular save would use. */);
5939 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5940 ¤t_buffer
->invisibility_spec
, Qnil
,
5941 doc
: /* Invisibility spec of this buffer.
5942 The default is t, which means that text is invisible
5943 if it has a non-nil `invisible' property.
5944 If the value is a list, a text character is invisible if its `invisible'
5945 property is an element in that list.
5946 If an element is a cons cell of the form (PROP . ELLIPSIS),
5947 then characters with property value PROP are invisible,
5948 and they have an ellipsis as well if ELLIPSIS is non-nil. */);
5950 DEFVAR_PER_BUFFER ("buffer-display-count",
5951 ¤t_buffer
->display_count
, Qnil
,
5952 doc
: /* A number incremented each time this buffer is displayed in a window.
5953 The function `set-window-buffer' increments it. */);
5955 DEFVAR_PER_BUFFER ("buffer-display-time",
5956 ¤t_buffer
->display_time
, Qnil
,
5957 doc
: /* Time stamp updated each time this buffer is displayed in a window.
5958 The function `set-window-buffer' updates this variable
5959 to the value obtained by calling `current-time'.
5960 If the buffer has never been shown in a window, the value is nil. */);
5962 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5963 doc
: /* *Non-nil means deactivate the mark when the buffer contents change.
5964 Non-nil also enables highlighting of the region whenever the mark is active.
5965 The variable `highlight-nonselected-windows' controls whether to highlight
5966 all windows or just the selected window.
5968 If the value is `lambda', that enables Transient Mark mode temporarily
5969 until the next buffer modification. If a command sets the value to `only',
5970 that enables Transient Mark mode for the following command only.
5971 During that following command, the value of `transient-mark-mode'
5972 is `identity'. If it is still `identity' at the end of that command,
5973 it changes to nil. */);
5974 Vtransient_mark_mode
= Qnil
;
5976 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5977 doc
: /* *Non-nil means disregard read-only status of buffers or characters.
5978 If the value is t, disregard `buffer-read-only' and all `read-only'
5979 text properties. If the value is a list, disregard `buffer-read-only'
5980 and disregard a `read-only' text property if the property value
5981 is a member of the list. */);
5982 Vinhibit_read_only
= Qnil
;
5984 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5985 doc
: /* Cursor to use when this buffer is in the selected window.
5986 Values are interpreted as follows:
5988 t use the cursor specified for the frame
5989 nil don't display a cursor
5990 box display a filled box cursor
5991 hollow display a hollow box cursor
5992 bar display a vertical bar cursor with default width
5993 (bar . WIDTH) display a vertical bar cursor with width WIDTH
5994 hbar display a horizontal bar cursor with default height
5995 (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT
5996 ANYTHING ELSE display a hollow box cursor
5998 When the buffer is displayed in a nonselected window,
5999 this variable has no effect; the cursor appears as a hollow box. */);
6001 DEFVAR_PER_BUFFER ("line-spacing",
6002 ¤t_buffer
->extra_line_spacing
, Qnil
,
6003 doc
: /* Additional space to put between lines when displaying a buffer.
6004 The space is measured in pixels, and put below lines on window systems.
6005 If value is a floating point number, it specifies the spacing relative
6006 to the default frame line height. nil means add no extra space. */);
6008 DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows",
6009 ¤t_buffer
->cursor_in_non_selected_windows
, Qnil
,
6010 doc
: /* *Cursor type to display in non-selected windows.
6011 t means to use hollow box cursor. See `cursor-type' for other values. */);
6013 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
6014 doc
: /* List of functions called with no args to query before killing a buffer. */);
6015 Vkill_buffer_query_functions
= Qnil
;
6017 defsubr (&Sbuffer_live_p
);
6018 defsubr (&Sbuffer_list
);
6019 defsubr (&Sget_buffer
);
6020 defsubr (&Sget_file_buffer
);
6021 defsubr (&Sget_buffer_create
);
6022 defsubr (&Smake_indirect_buffer
);
6023 defsubr (&Sgenerate_new_buffer_name
);
6024 defsubr (&Sbuffer_name
);
6025 /*defsubr (&Sbuffer_number);*/
6026 defsubr (&Sbuffer_file_name
);
6027 defsubr (&Sbuffer_base_buffer
);
6028 defsubr (&Sbuffer_local_value
);
6029 defsubr (&Sbuffer_local_variables
);
6030 defsubr (&Sbuffer_modified_p
);
6031 defsubr (&Sset_buffer_modified_p
);
6032 defsubr (&Sbuffer_modified_tick
);
6033 defsubr (&Srename_buffer
);
6034 defsubr (&Sother_buffer
);
6035 defsubr (&Sbuffer_enable_undo
);
6036 defsubr (&Skill_buffer
);
6037 defsubr (&Sset_buffer_major_mode
);
6038 defsubr (&Sswitch_to_buffer
);
6039 defsubr (&Spop_to_buffer
);
6040 defsubr (&Scurrent_buffer
);
6041 defsubr (&Sset_buffer
);
6042 defsubr (&Sbarf_if_buffer_read_only
);
6043 defsubr (&Sbury_buffer
);
6044 defsubr (&Serase_buffer
);
6045 defsubr (&Sset_buffer_multibyte
);
6046 defsubr (&Skill_all_local_variables
);
6048 defsubr (&Soverlayp
);
6049 defsubr (&Smake_overlay
);
6050 defsubr (&Sdelete_overlay
);
6051 defsubr (&Smove_overlay
);
6052 defsubr (&Soverlay_start
);
6053 defsubr (&Soverlay_end
);
6054 defsubr (&Soverlay_buffer
);
6055 defsubr (&Soverlay_properties
);
6056 defsubr (&Soverlays_at
);
6057 defsubr (&Soverlays_in
);
6058 defsubr (&Snext_overlay_change
);
6059 defsubr (&Sprevious_overlay_change
);
6060 defsubr (&Soverlay_recenter
);
6061 defsubr (&Soverlay_lists
);
6062 defsubr (&Soverlay_get
);
6063 defsubr (&Soverlay_put
);
6064 defsubr (&Srestore_buffer_modified_p
);
6070 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
6071 initial_define_key (control_x_map
, 'k', "kill-buffer");
6073 /* This must not be in syms_of_buffer, because Qdisabled is not
6074 initialized when that function gets called. */
6075 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);
6078 /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1
6079 (do not change this comment) */